ipath_file_ops.c revision 124b4dcb1dd3a6fb80051f1785117a732d785f70
17f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/* 2c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved. 37f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved. 47f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 57f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This software is available to you under a choice of one of two 67f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * licenses. You may choose to be licensed under the terms of the GNU 77f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * General Public License (GPL) Version 2, available from the file 87f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * COPYING in the main directory of this source tree, or the 97f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * OpenIB.org BSD license below: 107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Redistribution and use in source and binary forms, with or 127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * without modification, are permitted provided that the following 137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * conditions are met: 147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * - Redistributions of source code must retain the above 167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * copyright notice, this list of conditions and the following 177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * disclaimer. 187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * - Redistributions in binary form must reproduce the above 207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * copyright notice, this list of conditions and the following 217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * disclaimer in the documentation and/or other materials 227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * provided with the distribution. 237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * SOFTWARE. 327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/pci.h> 357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/poll.h> 367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/cdev.h> 377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/swap.h> 387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/vmalloc.h> 39124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson#include <linux/highmem.h> 40124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson#include <linux/io.h> 41124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson#include <linux/jiffies.h> 427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <asm/pgtable.h> 437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include "ipath_kernel.h" 4527b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan#include "ipath_common.h" 46124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson#include "ipath_user_sdma.h" 477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_open(struct inode *, struct file *); 497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_close(struct inode *, struct file *); 507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic ssize_t ipath_write(struct file *, const char __user *, size_t, 517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan loff_t *); 52124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olsonstatic ssize_t ipath_writev(struct kiocb *, const struct iovec *, 53124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson unsigned long , loff_t); 547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic unsigned int ipath_poll(struct file *, struct poll_table_struct *); 557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_mmap(struct file *, struct vm_area_struct *); 567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 572b8693c0617e972fc0b2fd1ebf8de97e15b656c3Arjan van de Venstatic const struct file_operations ipath_file_ops = { 587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .owner = THIS_MODULE, 597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .write = ipath_write, 60124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson .aio_write = ipath_writev, 617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .open = ipath_open, 627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .release = ipath_close, 637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .poll = ipath_poll, 647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .mmap = ipath_mmap 657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan}; 667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 670a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell/* 680a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell * Convert kernel virtual addresses to physical addresses so they don't 690a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell * potentially conflict with the chip addresses used as mmap offsets. 700a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell * It doesn't really matter what mmap offset we use as long as we can 710a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell * interpret it correctly. 720a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell */ 730a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbellstatic u64 cvt_kvaddr(void *p) 740a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell{ 750a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell struct page *page; 760a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell u64 paddr = 0; 770a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell 780a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell page = vmalloc_to_page(p); 790a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (page) 800a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell paddr = page_to_pfn(page) << PAGE_SHIFT; 810a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell 820a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell return paddr; 830a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell} 840a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell 859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_get_base_info(struct file *fp, 867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan void __user *ubase, size_t ubase_size) 877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd = port_fp(fp); 897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_base_info *kinfo = NULL; 917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned subport_cnt; 939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int shared, master; 949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t sz; 959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_cnt = pd->port_subport_cnt; 979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!subport_cnt) { 989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan shared = 0; 999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan master = 0; 1009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_cnt = 1; 1019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 1029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan shared = 1; 1039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan master = !subport_fp(fp); 1049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 1057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan sz = sizeof(*kinfo); 1079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* If port sharing is not requested, allow the old size structure */ 1089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!shared) 109c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage sz -= 7 * sizeof(u64); 1109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ubase_size < sz) { 1117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, 1129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "Base size %zu, need %zu (version mismatch?)\n", 1139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ubase_size, sz); 1147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 1157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 1167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo = kzalloc(sizeof(*kinfo), GFP_KERNEL); 1197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (kinfo == NULL) { 1207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 1217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 1227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = dd->ipath_f_get_base_info(pd, kinfo); 1257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 1267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 1277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdr_cnt = dd->ipath_rcvhdrcnt; 1297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdrent_size = dd->ipath_rcvhdrentsize; 1307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_tidegrcnt = dd->ipath_rcvegrcnt; 1317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbufsize = dd->ipath_rcvegrbufsize; 1327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * have to mmap whole thing 1347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbuftotlen = 1367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size; 1377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrperchunk = pd->port_rcvegrbufs_perchunk; 1387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrchunksize = kinfo->spi_rcv_egrbuftotlen / 1397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_chunks; 1409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_tidcnt = dd->ipath_rcvtidcnt / subport_cnt; 1419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (master) 1429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_tidcnt += dd->ipath_rcvtidcnt % subport_cnt; 1437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for this use, may be ipath_cfgports summed over all chips that 1457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * are are configured and present 1467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_nports = dd->ipath_cfgports; 1487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* unit (chip/board) our port is on */ 1497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_unit = dd->ipath_unit; 1507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for now, only a single page */ 1517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_tid_maxsize = PAGE_SIZE; 1527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Doing this per port, and based on the skip value, etc. This has 1557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * to be the actual buffer size, since the protocol code treats it 1567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * as an array. 1577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 1587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * These have to be set to user addresses in the user code via mmap. 1597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * These values are used on return to user code for the mmap target 1607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * addresses only. For 32 bit, same 44 bit address problem, so use 1617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the physical address, not virtual. Before 2.6.11, using the 1627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * page_address() macro worked, but in 2.6.11, even that returns the 1637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * full 64 bit address (upper bits all 1's). So far, using the 1647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * physical addresses (or chip offsets, for chip mapping) works, but 1659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * no doubt some future kernel release will change that, and we'll be 1669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * on to yet another method of dealing with this. 1677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdr_base = (u64) pd->port_rcvhdrq_phys; 1699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_rcvhdr_tailaddr = (u64) pd->port_rcvhdrqtailaddr_phys; 1707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbufs = (u64) pd->port_rcvegr_phys; 1717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_pioavailaddr = (u64) dd->ipath_pioavailregs_phys; 1727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_status = (u64) kinfo->spi_pioavailaddr + 1737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) dd->ipath_statusp - 1747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) dd->ipath_pioavailregs_dma; 1759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!shared) { 1769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piocnt = dd->ipath_pbufsport; 1779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piobufbase = (u64) pd->port_piobufs; 1789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->__spi_uregbase = (u64) dd->ipath_uregbase + 179a18e26ae442001de62f6b84a923e8613347dc35fRalph Campbell dd->ipath_ureg_align * pd->port_port; 1809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (master) { 1819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piocnt = (dd->ipath_pbufsport / subport_cnt) + 1829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_pbufsport % subport_cnt); 1839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Master's PIO buffers are after all the slave's */ 1849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piobufbase = (u64) pd->port_piobufs + 1859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign * 1869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_pbufsport - kinfo->spi_piocnt); 1879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 1889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned slave = subport_fp(fp) - 1; 1897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piocnt = dd->ipath_pbufsport / subport_cnt; 1919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piobufbase = (u64) pd->port_piobufs + 1929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign * kinfo->spi_piocnt * slave; 193c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } 1941d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson 1951d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson /* 1961d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson * Set the PIO avail update threshold to no larger 1971d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson * than the number of buffers per process. Note that 1981d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson * we decrease it here, but won't ever increase it. 1991d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson */ 2001d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson if (dd->ipath_pioupd_thresh && 2011d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson kinfo->spi_piocnt < dd->ipath_pioupd_thresh) { 2021d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson unsigned long flags; 2031d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson 2041d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson dd->ipath_pioupd_thresh = kinfo->spi_piocnt; 2051d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson ipath_dbg("Decreased pio update threshold to %u\n", 2061d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson dd->ipath_pioupd_thresh); 2071d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); 2081d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson dd->ipath_sendctrl &= ~(INFINIPATH_S_UPDTHRESH_MASK 2091d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson << INFINIPATH_S_UPDTHRESH_SHIFT); 2101d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson dd->ipath_sendctrl |= dd->ipath_pioupd_thresh 2111d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson << INFINIPATH_S_UPDTHRESH_SHIFT; 2121d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, 2131d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson dd->ipath_sendctrl); 2141d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); 2151d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson } 2161d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson 217c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage if (shared) { 218c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port_uregbase = (u64) dd->ipath_uregbase + 219a18e26ae442001de62f6b84a923e8613347dc35fRalph Campbell dd->ipath_ureg_align * pd->port_port; 220c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port_rcvegrbuf = kinfo->spi_rcv_egrbufs; 221c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port_rcvhdr_base = kinfo->spi_rcvhdr_base; 222c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port_rcvhdr_tailaddr = kinfo->spi_rcvhdr_tailaddr; 223c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage 2240a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell kinfo->__spi_uregbase = cvt_kvaddr(pd->subport_uregbase + 225c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage PAGE_SIZE * subport_fp(fp)); 2269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 2270a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell kinfo->spi_rcvhdr_base = cvt_kvaddr(pd->subport_rcvhdr_base + 228c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvhdrq_size * subport_fp(fp)); 229947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell kinfo->spi_rcvhdr_tailaddr = 0; 2300a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell kinfo->spi_rcv_egrbufs = cvt_kvaddr(pd->subport_rcvegrbuf + 231c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size * 232c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage subport_fp(fp)); 233c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage 234c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_subport_uregbase = 235c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage cvt_kvaddr(pd->subport_uregbase); 236c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_subport_rcvegrbuf = 237c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage cvt_kvaddr(pd->subport_rcvegrbuf); 238c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_subport_rcvhdr_base = 239c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage cvt_kvaddr(pd->subport_rcvhdr_base); 240c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage ipath_cdbg(PROC, "port %u flags %x %llx %llx %llx\n", 241c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port, kinfo->spi_runtime_flags, 242c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage (unsigned long long) kinfo->spi_subport_uregbase, 243c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage (unsigned long long) kinfo->spi_subport_rcvegrbuf, 244c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage (unsigned long long) kinfo->spi_subport_rcvhdr_base); 2459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 2469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 2479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_pioindex = (kinfo->spi_piobufbase - dd->ipath_piobufbase) / 2489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign; 2497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_pioalign = dd->ipath_palign; 2507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_qpair = IPATH_KD_QP; 252826d801009fb3c82832f2d92149446cce354bf61Dave Olson /* 253826d801009fb3c82832f2d92149446cce354bf61Dave Olson * user mode PIO buffers are always 2KB, even when 4KB can 254826d801009fb3c82832f2d92149446cce354bf61Dave Olson * be received, and sent via the kernel; this is ibmaxlen 255826d801009fb3c82832f2d92149446cce354bf61Dave Olson * for 2K MTU. 256826d801009fb3c82832f2d92149446cce354bf61Dave Olson */ 257826d801009fb3c82832f2d92149446cce354bf61Dave Olson kinfo->spi_piosize = dd->ipath_piosize2k - 2 * sizeof(u32); 2587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_mtu = dd->ipath_ibmaxlen; /* maxlen, not ibmtu */ 2597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_port = pd->port_port; 2609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_subport = subport_fp(fp); 261eaf6733bc176742fb08def2269441684e963c275Bryan O'Sullivan kinfo->spi_sw_version = IPATH_KERN_SWVERSION; 2627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_hw_version = dd->ipath_revision; 2637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (master) { 2659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_runtime_flags |= IPATH_RUNTIME_MASTER; 2669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 2679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 268c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage sz = (ubase_size < sizeof(*kinfo)) ? ubase_size : sizeof(*kinfo); 269c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage if (copy_to_user(ubase, kinfo, sz)) 2707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 2717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 2737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kfree(kinfo); 2747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 2757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 2767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 2787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_tid_update - update a port TID 2797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 2809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * @fp: the ipath device file 2817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @ti: the TID information 2827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * The new implementation as of Oct 2004 is that the driver assigns 2847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the tid and returns it to the caller. To make it easier to 2857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * catch bugs, and to reduce search time, we keep a cursor for 2867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * each port, walking the shadow tid array to find one that's not 2877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in use. 2887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * For now, if we can't allocate the full list, we fail, although 2907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in the long run, we'll allocate as many as we can, and the 2917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * caller will deal with that by trying the remaining pages later. 2927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * That means that when we fail, we have to mark the tids as not in 2937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * use again, in our shadow copy. 2947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * It's up to the caller to free the tids when they are done. 2967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We'll unlock the pages as they free them. 2977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Also, right now we are locking one page at a time, but since 2997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the intended use of this routine is for a single group of 3007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * virtually contiguous pages, that should change to improve 3017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * performance. 3027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_tid_update(struct ipath_portdata *pd, struct file *fp, 3047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_tid_info *ti) 3057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 3067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0, ntids; 3079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan u32 tid, porttid, cnt, i, tidcnt, tidoff; 3087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u16 *tidlist; 3097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 3107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 physaddr; 3117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long vaddr; 3127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 __iomem *tidbase; 3137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long tidmap[8]; 3147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct page **pagep = NULL; 3159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned subport = subport_fp(fp); 3167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow) { 3187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 3197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt = ti->tidcnt; 3237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cnt) { 3247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("After copyin, tidcnt 0, tidlist %llx\n", 3257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) ti->tidlist); 3267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 3277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Should we treat as success? likely a bug 3287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 3307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid = pd->port_port * dd->ipath_rcvtidcnt; 3339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) { 3349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt; 3359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tid = pd->port_tidcursor; 3369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidoff = 0; 3379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (!subport) { 3389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) + 3399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_rcvtidcnt % pd->port_subport_cnt); 3409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidoff = dd->ipath_rcvtidcnt - tidcnt; 3419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += tidoff; 3429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tid = tidcursor_fp(fp); 3439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 3449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt; 3459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidoff = tidcnt * (subport - 1); 3469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += tidoff; 3479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tid = tidcursor_fp(fp); 3489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 3499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (cnt > tidcnt) { 3507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* make sure it all fits in port_tid_pg_list */ 3517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "Process tried to allocate %u " 3527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "TIDs, only trying max (%u)\n", cnt, tidcnt); 3537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt = tidcnt; 3547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pagep = &((struct page **) pd->port_tid_pg_list)[tidoff]; 3569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidlist = &((u16 *) &pagep[dd->ipath_rcvtidcnt])[tidoff]; 3577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan memset(tidmap, 0, sizeof(tidmap)); 3597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* before decrement; chip actual # */ 3607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ntids = tidcnt; 3617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidbase = (u64 __iomem *) (((char __iomem *) dd->ipath_kregbase) + 3627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidbase + 3637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid * sizeof(*tidbase)); 3647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port%u %u tids, cursor %u, tidbase %p\n", 3667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, cnt, tid, tidbase); 3677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* virtual address of first page in transfer */ 3697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vaddr = ti->tidvaddr; 3707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!access_ok(VERIFY_WRITE, (void __user *) vaddr, 3717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt * PAGE_SIZE)) { 3727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Fail vaddr %p, %u pages, !access_ok\n", 3737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *)vaddr, cnt); 3747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 3757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_get_user_pages(vaddr, cnt, pagep); 3787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) { 3797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret == -EBUSY) { 3807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to lock addr %p, %u pages " 3817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(already locked)\n", 3827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) vaddr, cnt); 3837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 3847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for now, continue, and see what happens but with 3857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the new implementation, this should never happen, 3867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * unless perhaps the user has mpin'ed the pages 3877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * themselves (something we need to test) 3887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 3907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 3917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 3927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "Failed to lock addr %p, %u pages: " 3937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "errno %d\n", (void *) vaddr, cnt, -ret); 3947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < cnt; i++, vaddr += PAGE_SIZE) { 3987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (; ntids--; tid++) { 3997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (tid == tidcnt) 4007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = 0; 4017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow[porttid + tid]) 4027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 4037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ntids < 0) { 4057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 4067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * oops, wrapped all the way through their TIDs, 4077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * and didn't have enough free; see comments at 4087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * start of routine 4097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Not enough free TIDs for %u pages " 4117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(index %d), failing\n", cnt, i); 4127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan i--; /* last tidlist[i] not filled in */ 4137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 4147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 4157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidlist[i] = tid + tidoff; 4177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Updating idx %u to TID %u, " 4189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "vaddr %lx\n", i, tid + tidoff, vaddr); 4197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* we "know" system pages and TID pages are same size */ 4207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[porttid + tid] = pagep[i]; 4211fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_physshadow[porttid + tid] = ipath_map_page( 4221fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->pcidev, pagep[i], 0, PAGE_SIZE, 4231fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PCI_DMA_FROMDEVICE); 4247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 4257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * don't need atomic or it's overhead 4267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan __set_bit(tid, tidmap); 4281fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan physaddr = dd->ipath_physshadow[porttid + tid]; 4297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pagelocks++; 4307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, 4317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "TID %u, vaddr %lx, physaddr %llx pgp %p\n", 4327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid, vaddr, (unsigned long long) physaddr, 4337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pagep[i]); 434f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger dd->ipath_f_put_tid(dd, &tidbase[tid], RCVHQ_RCV_TYPE_EXPECTED, 435f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger physaddr); 4367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 4377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * don't check this tid in ipath_portshadow, since we 4387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * just filled it in; start with the next one. 4397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid++; 4417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) { 4447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 limit; 4457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cleanup: 4467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* jump here if copy out of updated info failed... */ 4477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("After failure (ret=%d), undo %d of %d entries\n", 4487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan -ret, i, cnt); 4497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* same code that's in ipath_free_tid() */ 4507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = sizeof(tidmap) * BITS_PER_BYTE; 4517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (limit > tidcnt) 4527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* just in case size changes in future */ 4537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = tidcnt; 4547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = find_first_bit((const unsigned long *)tidmap, limit); 4557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (; tid < limit; tid++) { 4567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!test_bit(tid, tidmap)) 4577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 4587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pageshadow[porttid + tid]) { 4597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Freeing TID %u\n", 4607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid); 461f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger dd->ipath_f_put_tid(dd, &tidbase[tid], 462f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger RCVHQ_RCV_TYPE_EXPECTED, 4637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_tidinvalid); 4641fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pci_unmap_page(dd->pcidev, 4651fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_physshadow[porttid + tid], 4661fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PAGE_SIZE, PCI_DMA_FROMDEVICE); 4677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[porttid + tid] = NULL; 4687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 4697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_release_user_pages(pagep, cnt); 4727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 4737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 4747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Copy the updated array, with ipath_tid's filled in, back 4757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * to user. Since we did the copy in already, this "should 4767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * never fail" If it does, we have to clean up... 4777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user((void __user *) 4797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) ti->tidlist, 4807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidlist, cnt * sizeof(*tidlist))) { 4817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 4827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto cleanup; 4837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user((void __user *) (unsigned long) ti->tidmap, 4857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidmap, sizeof tidmap)) { 4867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 4877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto cleanup; 4887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (tid == tidcnt) 4907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = 0; 4919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) 4929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_tidcursor = tid; 4939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else 4949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcursor_fp(fp) = tid; 4957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 4987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 4997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to map %u TID pages, failing with %d\n", 5007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, -ret); 5017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 5027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 5037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 5057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_tid_free - free a port TID 5067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 5079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * @subport: the subport 5087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @ti: the TID info 5097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 5107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * right now we are unlocking one page at a time, but since 5117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the intended use of this routine is for a single group of 5127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * virtually contiguous pages, that should change to improve 5137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * performance. We check that the TID is in range for this port 5147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * but otherwise don't check validity; if user has an error and 5157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * frees the wrong tid, it's only their own data that can thereby 5167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * be corrupted. We do check that the TID was in use, for sanity 5177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We always use our idea of the saved address, not the address that 5187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * they pass in to us. 5197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 5207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_tid_free(struct ipath_portdata *pd, unsigned subport, 5227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_tid_info *ti) 5237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 5247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 5257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 tid, porttid, cnt, limit, tidcnt; 5267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 5277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 __iomem *tidbase; 5287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long tidmap[8]; 5297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow) { 5317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 5327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 5337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_from_user(tidmap, (void __user *)(unsigned long)ti->tidmap, 5367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan sizeof tidmap)) { 5377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 5387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 5397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid = pd->port_port * dd->ipath_rcvtidcnt; 5429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) 5439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt; 5449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (!subport) { 5459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) + 5469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_rcvtidcnt % pd->port_subport_cnt); 5479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += dd->ipath_rcvtidcnt - tidcnt; 5489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 5499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt; 5509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += tidcnt * (subport - 1); 5519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 5527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) + 5537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidbase + 5547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid * sizeof(*tidbase)); 5557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = sizeof(tidmap) * BITS_PER_BYTE; 5577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (limit > tidcnt) 5587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* just in case size changes in future */ 5597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = tidcnt; 5607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = find_first_bit(tidmap, limit); 5617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port%u free %u tids; first bit (max=%d) " 5627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "set is %d, porttid %u\n", pd->port_port, ti->tidcnt, 5637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit, tid, porttid); 5647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (cnt = 0; tid < limit; tid++) { 5657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 5667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * small optimization; if we detect a run of 3 or so without 5677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * any set, use find_first_bit again. That's mainly to 5687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * accelerate the case where we wrapped, so we have some at 5697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the beginning, and some at the end, and a big gap 5707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in the middle. 5717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 5727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!test_bit(tid, tidmap)) 5737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 5747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt++; 5757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pageshadow[porttid + tid]) { 5763ac8c70f74ca67111c570f4ba828cc4b6fc229f4Dave Olson struct page *p; 5773ac8c70f74ca67111c570f4ba828cc4b6fc229f4Dave Olson p = dd->ipath_pageshadow[porttid + tid]; 5783ac8c70f74ca67111c570f4ba828cc4b6fc229f4Dave Olson dd->ipath_pageshadow[porttid + tid] = NULL; 5797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "PID %u freeing TID %u\n", 5807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pid, tid); 581f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger dd->ipath_f_put_tid(dd, &tidbase[tid], 582f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger RCVHQ_RCV_TYPE_EXPECTED, 5837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_tidinvalid); 5841fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pci_unmap_page(dd->pcidev, 5851fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_physshadow[porttid + tid], 5861fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PAGE_SIZE, PCI_DMA_FROMDEVICE); 5873ac8c70f74ca67111c570f4ba828cc4b6fc229f4Dave Olson ipath_release_user_pages(&p, 1); 5887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 5897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else 5907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Unused tid %u, ignoring\n", tid); 5917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cnt != ti->tidcnt) 5937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("passed in tidcnt %d, only %d bits set in map\n", 5947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, cnt); 5957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 5967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 5977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to unmap %u TID pages, failing with %d\n", 5987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, -ret); 5997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 6007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 6017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 6037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_set_part_key - set a partition key 6047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 6057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @key: the key 6067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 6077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We can have up to 4 active at a time (other than the default, which is 6087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * always allowed). This is somewhat tricky, since multiple ports may set 6097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the same key, so we reference count them, and clean up at exit. All 4 6107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * partition keys are packed into a single infinipath register. It's an 6117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * error for a process to set the same pkey multiple times. We provide no 6127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * mechanism to de-allocate a pkey at this time, we may eventually need to 6137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * do that. I've used the atomic operations, and no locking, and only make 6147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * a single pass through what's available. This should be more than 6157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * adequate for some time. I'll think about spinlocks or the like if and as 6167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * it's necessary. 6177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_set_part_key(struct ipath_portdata *pd, u16 key) 6197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 6207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 6217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, any = 0, pidx = -1; 6227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u16 lkey = key & 0x7FFF; 6237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 6247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 62527b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan if (lkey == (IPATH_DEFAULT_P_KEY & 0x7FFF)) { 6267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* nothing to do; this key always valid */ 6277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 6287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u try to set pkey %hx, current keys " 6327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%hx:%x %hx:%x %hx:%x %hx:%x\n", 6337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, dd->ipath_pkeys[0], 6347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[0]), dd->ipath_pkeys[1], 6357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[1]), dd->ipath_pkeys[2], 6367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[2]), dd->ipath_pkeys[3], 6377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[3])); 6387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!lkey) { 6407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "p%u tries to set key 0, not allowed\n", 6417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port); 6427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 6437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 6477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Set the full membership bit, because it has to be 6487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * set in the register or the packet, and it seems 6497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * cleaner to set in the register than to force all 6507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * callers to set it. (see bug 4331) 6517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan key |= 0x8000; 6537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) { 6557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_pkeys[i] && pidx == -1) 6567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pidx = i; 6577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_pkeys[i] == key) { 6587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u tries to set same pkey " 6597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(%x) more than once\n", 6607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key); 6617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EEXIST; 6627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pidx == -1) { 6667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("All pkeys for port %u already in use, " 6677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 6687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 6697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) { 6727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pkeys[i]) { 6737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan any++; 6747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 6757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pkeys[i] == key) { 6777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_t *pkrefs = &dd->ipath_pkeyrefs[i]; 6787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_inc_return(pkrefs) > 1) { 6807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[pidx] = key; 6817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u set key %x " 6827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "matches #%d, count now %d\n", 6837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, i, 6847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(pkrefs)); 6857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 6867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 6887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 6897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * lost race, decrement count, catch below 6907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_dec(pkrefs); 6927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Lost race, count was " 6937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "0, after dec, it's %d\n", 6947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(pkrefs)); 6957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan any++; 6967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) { 6997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 7007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * It makes no sense to have both the limited and 7017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * full membership PKEY set at the same time since 7027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the unlimited one will disable the limited one. 7037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 7047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EEXIST; 7057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 7067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!any) { 7097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u, all pkeys already in use, " 7107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 7117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 7127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 7137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) { 7157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pkeys[i] && 7167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) { 7177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pkey; 7187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for ipathstats, etc. */ 7207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pkeys[i] = lkey; 7217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[pidx] = dd->ipath_pkeys[i] = key; 7227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pkey = 7237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (u64) dd->ipath_pkeys[0] | 7247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 7257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 7267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 7277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "p%u set key %x in #%d, " 7287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "portidx %d, new pkey reg %llx\n", 7297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, i, pidx, 7307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pkey); 7317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg( 7327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd, dd->ipath_kregs->kr_partitionkey, pkey); 7337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 7357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 7367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u, all pkeys already in use 2nd pass, " 7397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 7407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 7417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 7437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 7447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 7457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 7477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_manage_rcvq - manage a port's receive queue 7487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 7499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * @subport: the subport 7507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @start_stop: action to carry out 7517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 7527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * start_stop == 0 disables receive on the port, for use in queue 7537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * overflow conditions. start_stop==1 re-enables, to be used to 7547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * re-init the software copy of the head register 7557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 7569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_manage_rcvq(struct ipath_portdata *pd, unsigned subport, 7579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int start_stop) 7587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 7597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 7607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(PROC, "%sabling rcv for unit %u port %u:%u\n", 7627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan start_stop ? "en" : "dis", dd->ipath_unit, 7639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, subport); 7649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (subport) 7659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 7667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* atomically clear receive enable port. */ 7677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (start_stop) { 7687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 7697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * On enable, force in-memory copy of the tail register to 7707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 0, so that protocol code doesn't have to worry about 7717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * whether or not the chip has yet updated the in-memory 7727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * copy or not on return from the system call. The chip 7737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * always resets it's tail register back to 0 on a 7747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * transition from disabled to enabled. This could cause a 7757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * problem if software was broken, and did the enable w/o 7767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the disable, but eventually the in-memory copy will be 7777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * updated and correct itself, even in the face of software 7787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * bugs. 7797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 780c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell if (pd->port_rcvhdrtail_kvaddr) 781c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell ipath_clear_rcvhdrtail(pd); 782d8274869d742c3d8082e1428de47e54d12104928Dave Olson set_bit(dd->ipath_r_portenable_shift + pd->port_port, 7837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_rcvctrl); 7847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else 785d8274869d742c3d8082e1428de47e54d12104928Dave Olson clear_bit(dd->ipath_r_portenable_shift + pd->port_port, 7867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_rcvctrl); 7877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 7887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl); 7897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* now be sure chip saw it before we return */ 79044f8e3f3f7d8e61b4aafced278403955fe18ad88Roland Dreier ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); 7917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (start_stop) { 7927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 7937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * And try to be sure that tail reg update has happened too. 7947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This should in theory interlock with the RXE changes to 7957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the tail register. Don't assign it to the tail register 7967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in memory copy, since we could overwrite an update by the 7977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * chip if we did. 7987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 79944f8e3f3f7d8e61b4aafced278403955fe18ad88Roland Dreier ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); 8007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* always; new head should be equal to new tail; see above */ 8029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 8037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return 0; 8047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 8057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void ipath_clean_part_key(struct ipath_portdata *pd, 8077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd) 8087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 8097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, j, pchanged = 0; 8107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 oldpkey; 8117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for debugging only */ 8137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan oldpkey = (u64) dd->ipath_pkeys[0] | 8147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 8157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 8167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 8177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) { 8197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_pkeys[i]) 8207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 8217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "look for key[%d] %hx in pkeys\n", i, 8227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i]); 8237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (j = 0; j < ARRAY_SIZE(dd->ipath_pkeys); j++) { 8247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* check for match independent of the global bit */ 8257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((dd->ipath_pkeys[j] & 0x7fff) != 8267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (pd->port_pkeys[i] & 0x7fff)) 8277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 8287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_dec_and_test(&dd->ipath_pkeyrefs[j])) { 8297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u clear key " 8307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%x matches #%d\n", 8317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, 8327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i], j); 8337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pkeys[j] = 8347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pkeys[j] = 0; 8357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pchanged++; 8367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else ipath_cdbg( 8387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan VERBOSE, "p%u key %x matches #%d, " 8397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "but ref still %d\n", pd->port_port, 8407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i], j, 8417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[j])); 8427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 8437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i] = 0; 8457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pchanged) { 8477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pkey = (u64) dd->ipath_pkeys[0] | 8487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 8497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 8507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 8517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u old pkey reg %llx, " 8527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "new pkey reg %llx\n", pd->port_port, 8537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) oldpkey, 8547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pkey); 8557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey, 8567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pkey); 8577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 8597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan/* 8619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Initialize the port data with the receive buffer sizes 8629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * so this can be done while the master port is locked. 8639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Otherwise, there is a race with a slave opening the port 8649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * and seeing these fields uninitialized. 8659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 8669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic void init_user_egr_sizes(struct ipath_portdata *pd) 8679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 8689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 8699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned egrperchunk, egrcnt, size; 8709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 8719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 8729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * to avoid wasting a lot of memory, we allocate 32KB chunks of 8739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * physically contiguous memory, advance through it until used up 8749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * and then allocate more. Of course, we need memory to store those 8759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * extra pointers, now. Started out with 256KB, but under heavy 8769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * memory pressure (creating large files and then copying them over 8779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * NFS while doing lots of MPI jobs), we hit some allocation 8789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * failures, even though we can sleep... (2.6.10) Still get 8799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * failures at 64K. 32K is the lowest we can go without wasting 8809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * additional memory. 8819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 8829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = 0x8000; 8839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan egrperchunk = size / dd->ipath_rcvegrbufsize; 8849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan egrcnt = dd->ipath_rcvegrcnt; 8859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf_chunks = (egrcnt + egrperchunk - 1) / egrperchunk; 8869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbufs_perchunk = egrperchunk; 8879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf_size = size; 8889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 8899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 8907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 8917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_create_user_egr - allocate eager TID buffers 8927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port to allocate TID buffers for 8937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 8947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This routine is now quite different for user and kernel, because 8957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the kernel uses skb's, for the accelerated network performance 8967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This is the user port version 8977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 8987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Allocate the eager TID buffers and program them into infinipath 8997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * They are no longer completely contiguous, we do multiple allocation 9007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * calls. 9017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 9027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_create_user_egr(struct ipath_portdata *pd) 9037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 9047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 9059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned e, egrcnt, egrperchunk, chunk, egrsize, egroff; 9067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t size; 9077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 9080ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan gfp_t gfp_flags; 9090ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan 9100ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan /* 9110ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * GFP_USER, but without GFP_FS, so buffer cache can be 9120ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * coalesced (we hope); otherwise, even at order 4, 9130ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * heavy filesystem activity makes these fail, and we can 9140ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * use compound pages. 9150ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan */ 9160ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan gfp_flags = __GFP_WAIT | __GFP_IO | __GFP_COMP; 9177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egrcnt = dd->ipath_rcvegrcnt; 9197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* TID number offset for this port */ 92060948a415859cb859e24f0dfe739069d66577466Ralph Campbell egroff = (pd->port_port - 1) * egrcnt + dd->ipath_p0_rcvegrcnt; 9217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egrsize = dd->ipath_rcvegrbufsize; 9227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Allocating %d egr buffers, at egrtid " 9237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "offset %x, egrsize %u\n", egrcnt, egroff, egrsize); 9247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan chunk = pd->port_rcvegrbuf_chunks; 9269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan egrperchunk = pd->port_rcvegrbufs_perchunk; 9279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = pd->port_rcvegrbuf_size; 9289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf = kmalloc(chunk * sizeof(pd->port_rcvegrbuf[0]), 9299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan GFP_KERNEL); 9307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf) { 9317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 9327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 9337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys = 9359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kmalloc(chunk * sizeof(pd->port_rcvegrbuf_phys[0]), 9369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan GFP_KERNEL); 9377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf_phys) { 9387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 9397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail_rcvegrbuf; 9407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) { 9427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf[e] = dma_alloc_coherent( 9447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->pcidev->dev, size, &pd->port_rcvegrbuf_phys[e], 9457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan gfp_flags); 9467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf[e]) { 9487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 9497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail_rcvegrbuf_phys; 9507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegr_phys = pd->port_rcvegrbuf_phys[0]; 9547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = chunk = 0; chunk < pd->port_rcvegrbuf_chunks; chunk++) { 9567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dma_addr_t pa = pd->port_rcvegrbuf_phys[chunk]; 9577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned i; 9587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; e < egrcnt && i < egrperchunk; e++, i++) { 9607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_f_put_tid(dd, e + egroff + 9617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (u64 __iomem *) 9627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((char __iomem *) 9637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_kregbase + 964f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger dd->ipath_rcvegrbase), 965f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger RCVHQ_RCV_TYPE_EAGER, pa); 9667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pa += egrsize; 9677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cond_resched(); /* don't hog the cpu */ 9697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 9727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 9737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail_rcvegrbuf_phys: 9757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = 0; e < pd->port_rcvegrbuf_chunks && 976f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan pd->port_rcvegrbuf[e]; e++) { 9777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dma_free_coherent(&dd->pcidev->dev, size, 9787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf[e], 9797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys[e]); 9807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 981f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 9829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(pd->port_rcvegrbuf_phys); 9837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys = NULL; 9847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail_rcvegrbuf: 9859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(pd->port_rcvegrbuf); 9867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf = NULL; 9877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 9887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 9897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 9907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 991f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 992f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan/* common code for the mappings on dma_alloc_coherent mem */ 993f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivanstatic int ipath_mmap_mem(struct vm_area_struct *vma, 9941fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan struct ipath_portdata *pd, unsigned len, int write_ok, 9951fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan void *kvaddr, char *what) 996f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan{ 997f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 9981fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan unsigned long pfn; 999f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan int ret; 1000f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 1001f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > len) { 1002f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dev_info(&dd->pcidev->dev, 1003f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "FAIL on %s: len %lx > %x\n", what, 1004f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_end - vma->vm_start, len); 1005f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = -EFAULT; 1006f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan goto bail; 1007f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 1008f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 1009f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (!write_ok) { 1010f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (vma->vm_flags & VM_WRITE) { 1011f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dev_info(&dd->pcidev->dev, 1012f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "%s must be mapped readonly\n", what); 1013f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = -EPERM; 1014f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan goto bail; 1015f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 1016f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 1017f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* don't allow them to later change with mprotect */ 1018f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYWRITE; 1019f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 1020f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 10211fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pfn = virt_to_phys(kvaddr) >> PAGE_SHIFT; 1022f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = remap_pfn_range(vma, vma->vm_start, pfn, 1023f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan len, vma->vm_page_prot); 1024f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (ret) 10251fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dev_info(&dd->pcidev->dev, "%s port%u mmap of %lx, %x " 10261fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan "bytes r%c failed: %d\n", what, pd->port_port, 10271fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pfn, len, write_ok?'w':'o', ret); 1028f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan else 10291fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan ipath_cdbg(VERBOSE, "%s port%u mmaped %lx, %x bytes " 10301fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan "r%c\n", what, pd->port_port, pfn, len, 10311fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan write_ok?'w':'o'); 1032f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivanbail: 1033f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan return ret; 1034f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan} 1035f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 10367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_ureg(struct vm_area_struct *vma, struct ipath_devdata *dd, 10377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 ureg) 10387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long phys; 10407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 10417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1042f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* 1043f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * This is real hardware, so use io_remap. This is the mechanism 1044f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * for the user process to update the head registers for their port 1045f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * in the chip. 1046f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan */ 10477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > PAGE_SIZE) { 10487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL mmap userreg: reqlen " 10497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%lx > PAGE\n", vma->vm_end - vma->vm_start); 10507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 10517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 10527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys = dd->ipath_physaddr + ureg; 10537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 10547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; 10567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = io_remap_pfn_range(vma, vma->vm_start, 10577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys >> PAGE_SHIFT, 10587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 10597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot); 10607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 10627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 10637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_piobufs(struct vm_area_struct *vma, 10657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd, 10669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd, 10679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned piobufs, unsigned piocnt) 10687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long phys; 10707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 10717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1073f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * When we map the PIO buffers in the chip, we want to map them as 1074f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * writeonly, no read possible. This prevents access to previous 1075f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * process data, and catches users who might try to read the i/o 1076f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * space due to a bug. 10777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 10789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > (piocnt * dd->ipath_palign)) { 10797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL mmap piobufs: " 10807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "reqlen %lx > PAGE\n", 10817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start); 10829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 10837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan phys = dd->ipath_physaddr + piobufs; 1087f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 1088eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan#if defined(__powerpc__) 1089eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan /* There isn't a generic way to specify writethrough mappings */ 1090eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; 1091eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) |= _PAGE_WRITETHRU; 1092eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) &= ~_PAGE_GUARDED; 1093eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan#endif 1094eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan 1095367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan /* 1096367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan * don't allow them to later change to readable with mprotect (for when 1097367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan * not initially mapped readable, as is normally the case) 1098367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan */ 1099f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYREAD; 11007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; 11017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = io_remap_pfn_range(vma, vma->vm_start, phys >> PAGE_SHIFT, 11037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 11047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot); 11057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 11067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 11077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 11087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_rcvegrbufs(struct vm_area_struct *vma, 11107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd) 11117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 11127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 11137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long start, size; 11147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t total_size, i; 11151fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan unsigned long pfn; 11167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 11177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size = pd->port_rcvegrbuf_size; 11197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan total_size = pd->port_rcvegrbuf_chunks * size; 11207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > total_size) { 11217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL on egr bufs: " 11227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "reqlen %lx > actual %lx\n", 11237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 11247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) total_size); 11259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 11267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 11277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 11287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (vma->vm_flags & VM_WRITE) { 11307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "Can't map eager buffers as " 11317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "writable (flags=%lx)\n", vma->vm_flags); 11327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EPERM; 11337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 11347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1135f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* don't allow them to later change to writeable with mprotect */ 1136f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYWRITE; 11377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan start = vma->vm_start; 11397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < pd->port_rcvegrbuf_chunks; i++, start += size) { 11411fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pfn = virt_to_phys(pd->port_rcvegrbuf[i]) >> PAGE_SHIFT; 11421fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan ret = remap_pfn_range(vma, start, pfn, size, 11431fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan vma->vm_page_prot); 11447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 11457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 11467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 11477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 11487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 11507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 11517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 11527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan/* 11543c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin * ipath_file_vma_fault - handle a VMA page fault. 11559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 11563c8450860ba9d6279dbc969633eacf99161860d9Nick Pigginstatic int ipath_file_vma_fault(struct vm_area_struct *vma, 11573c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin struct vm_fault *vmf) 11589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 11593c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin struct page *page; 11609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11613c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT)); 11629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!page) 11633c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin return VM_FAULT_SIGBUS; 11649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan get_page(page); 11653c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin vmf->page = page; 11663c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin 11673c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin return 0; 11689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 11699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic struct vm_operations_struct ipath_file_vm_ops = { 11713c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin .fault = ipath_file_vma_fault, 11729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan}; 11739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int mmap_kvaddr(struct vm_area_struct *vma, u64 pgaddr, 11759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd, unsigned subport) 11769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 11779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned long len; 11789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_devdata *dd; 11799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan void *addr; 11809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t size; 11810a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell int ret = 0; 11829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* If the port is not shared, all addresses should be physical */ 11840a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (!pd->port_subport_cnt) 11859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 11869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd = pd->port_dd; 11889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size; 11899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 1191c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * Each process has all the subport uregbase, rcvhdrq, and 1192c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * rcvegrbufs mmapped - as an array for all the processes, 1193c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * and also separately for this process. 11949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 1195c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage if (pgaddr == cvt_kvaddr(pd->subport_uregbase)) { 1196c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_uregbase; 1197c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size = PAGE_SIZE * pd->port_subport_cnt; 1198c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base)) { 1199c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_rcvhdr_base; 1200c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size = pd->port_rcvhdrq_size * pd->port_subport_cnt; 1201c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf)) { 1202c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_rcvegrbuf; 1203c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size *= pd->port_subport_cnt; 1204c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_uregbase + 1205c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage PAGE_SIZE * subport)) { 1206c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_uregbase + PAGE_SIZE * subport; 1207c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size = PAGE_SIZE; 1208c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base + 1209c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvhdrq_size * subport)) { 1210c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_rcvhdr_base + 1211c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvhdrq_size * subport; 1212c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size = pd->port_rcvhdrq_size; 1213c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf + 1214c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size * subport)) { 1215c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_rcvegrbuf + size * subport; 1216c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage /* rcvegrbufs are read-only on the slave */ 1217c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage if (vma->vm_flags & VM_WRITE) { 1218c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage dev_info(&dd->pcidev->dev, 1219c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage "Can't map eager buffers as " 1220c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage "writable (flags=%lx)\n", vma->vm_flags); 1221c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage ret = -EPERM; 1222c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage goto bail; 1223c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } 1224c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage /* 1225c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * Don't allow permission to later change to writeable 1226c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * with mprotect. 1227c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage */ 1228c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage vma->vm_flags &= ~VM_MAYWRITE; 1229c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else { 12309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 1231c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } 12329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan len = vma->vm_end - vma->vm_start; 12339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (len > size) { 12349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(MM, "FAIL: reqlen %lx > %zx\n", len, size); 12359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 12369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 12379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 12389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_pgoff = (unsigned long) addr >> PAGE_SHIFT; 12409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_ops = &ipath_file_vm_ops; 12419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_flags |= VM_RESERVED | VM_DONTEXPAND; 12420a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell ret = 1; 12439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 12459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 12469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 12479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 12497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_mmap - mmap various structures into user space 12507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @fp: the file pointer 12517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @vma: the VM area 12527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 12537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We use this to have a shared buffer between the kernel and the user code 12547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for the rcvhdr queue, egr buffers, and the per-port user regs and pio 12557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * buffers in the chip. We have the open and close entries so we can bump 12567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the ref count and keep the driver from being unloaded while still mapped. 12577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_mmap(struct file *fp, struct vm_area_struct *vma) 12597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 12607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 12617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 12627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pgaddr, ureg; 12639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned piobufs, piocnt; 12647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 12657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 12679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd) { 12689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 12699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 12709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 12717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 1272f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 12737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 12747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This is the ipath_do_user_init() code, mapping the shared buffers 12757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * into the user process. The address referred to by vm_pgoff is the 12769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * file offset passed via mmap(). For shared ports, this is the 12779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * kernel vmalloc() address of the pages to share with the master. 12789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * For non-shared or master ports, this is a physical address. 12799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * We only do one mmap for each space mapped. 12807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pgaddr = vma->vm_pgoff << PAGE_SHIFT; 12827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 12849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Check for 0 in case one of the allocations failed, but user 12859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * called mmap anyway. 12867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pgaddr) { 12889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 12899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 1290f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 12917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(MM, "pgaddr %llx vm_start=%lx len %lx port %u:%u:%u\n", 12937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pgaddr, vma->vm_start, 12949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_end - vma->vm_start, dd->ipath_unit, 12959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, subport_fp(fp)); 12967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 12989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Physical addresses must fit in 40 bits for our hardware. 12999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Check for kernel virtual addresses first, anything else must 13009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * match a HW or memory address. 13019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 13020a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell ret = mmap_kvaddr(vma, pgaddr, pd, subport_fp(fp)); 13030a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (ret) { 13040a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (ret > 0) 13050a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell ret = 0; 13069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 13079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 13089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1309a18e26ae442001de62f6b84a923e8613347dc35fRalph Campbell ureg = dd->ipath_uregbase + dd->ipath_ureg_align * pd->port_port; 13109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) { 13119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* port is not shared */ 13129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piocnt = dd->ipath_pbufsport; 13139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piobufs = pd->port_piobufs; 13149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (!subport_fp(fp)) { 13159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* caller is the master */ 13169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piocnt = (dd->ipath_pbufsport / pd->port_subport_cnt) + 13179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_pbufsport % pd->port_subport_cnt); 13189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piobufs = pd->port_piobufs + 13199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign * (dd->ipath_pbufsport - piocnt); 13209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 13219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned slave = subport_fp(fp) - 1; 13229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 13239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* caller is a slave */ 13249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piocnt = dd->ipath_pbufsport / pd->port_subport_cnt; 13259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piobufs = pd->port_piobufs + dd->ipath_palign * piocnt * slave; 1326f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 13279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 13289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (pgaddr == ureg) 13297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_ureg(vma, dd, ureg); 13309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == piobufs) 13319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = mmap_piobufs(vma, dd, pd, piobufs, piocnt); 13329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == dd->ipath_pioavailregs_phys) 13339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* in-memory copy of pioavail registers */ 13349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0, 13351fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan (void *) dd->ipath_pioavailregs_dma, 13369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "pioavail registers"); 13379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == pd->port_rcvegr_phys) 13387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_rcvegrbufs(vma, pd); 13399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == (u64) pd->port_rcvhdrq_phys) 1340f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* 1341525d0ca1d452ed336c1d907fb20c104467a8a47bBryan O'Sullivan * The rcvhdrq itself; readonly except on HT (so have 1342f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * to allow writable mapping), multiple pages, contiguous 1343f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * from an i/o perspective. 1344f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan */ 13459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, pd->port_rcvhdrq_size, 1, 13461fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pd->port_rcvhdrq, 1347f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "rcvhdrq"); 13489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == (u64) pd->port_rcvhdrqtailaddr_phys) 1349f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* in-memory copy of rcvhdrq tail register */ 1350f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0, 13511fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pd->port_rcvhdrtail_kvaddr, 1352f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "rcvhdrq tail"); 13537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else 13547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 13557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_private_data = NULL; 13577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 13597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 13609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "Failure %d on off %llx len %lx\n", 13619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan -ret, (unsigned long long)pgaddr, 13629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_end - vma->vm_start); 13639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 13647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 13657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 13667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 136770c51da2c4f84317bb13a2b564600afdcebd686fArthur Jonesstatic unsigned ipath_poll_hdrqfull(struct ipath_portdata *pd) 136870c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones{ 136970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones unsigned pollflag = 0; 137070c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 137170c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones if ((pd->poll_type & IPATH_POLL_TYPE_OVERFLOW) && 137270c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_hdrqfull != pd->port_hdrqfull_poll) { 137370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pollflag |= POLLIN | POLLRDNORM; 137470c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_hdrqfull_poll = pd->port_hdrqfull; 137570c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones } 137670c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 137770c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones return pollflag; 137870c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones} 137970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 1380f2d042313e420002b06715675963cfab48ed2597Robert Walshstatic unsigned int ipath_poll_urgent(struct ipath_portdata *pd, 1381f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct file *fp, 1382f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct poll_table_struct *pt) 13837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 1384e35d710d0c5b74bc9833d6a3791706bd577a3724Bryan O'Sullivan unsigned pollflag = 0; 13857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 13867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 13887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 138970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* variable access in ipath_poll_hdrqfull() needs this */ 139070c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones rmb(); 139170c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pollflag = ipath_poll_hdrqfull(pd); 13927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 139370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones if (pd->port_urgent != pd->port_urgent_poll) { 1394f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag |= POLLIN | POLLRDNORM; 139570c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_urgent_poll = pd->port_urgent; 1396f2d042313e420002b06715675963cfab48ed2597Robert Walsh } 13977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1398f2d042313e420002b06715675963cfab48ed2597Robert Walsh if (!pollflag) { 139970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* this saves a spin_lock/unlock in interrupt handler... */ 1400f2d042313e420002b06715675963cfab48ed2597Robert Walsh set_bit(IPATH_PORT_WAITING_URG, &pd->port_flag); 140170c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* flush waiting flag so don't miss an event... */ 140270c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones wmb(); 1403f2d042313e420002b06715675963cfab48ed2597Robert Walsh poll_wait(fp, &pd->port_wait, pt); 1404f2d042313e420002b06715675963cfab48ed2597Robert Walsh } 1405f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1406f2d042313e420002b06715675963cfab48ed2597Robert Walsh return pollflag; 1407f2d042313e420002b06715675963cfab48ed2597Robert Walsh} 1408f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1409f2d042313e420002b06715675963cfab48ed2597Robert Walshstatic unsigned int ipath_poll_next(struct ipath_portdata *pd, 1410f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct file *fp, 1411f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct poll_table_struct *pt) 1412f2d042313e420002b06715675963cfab48ed2597Robert Walsh{ 141370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones u32 head; 141470c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones u32 tail; 1415f2d042313e420002b06715675963cfab48ed2597Robert Walsh unsigned pollflag = 0; 1416f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct ipath_devdata *dd; 1417f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1418f2d042313e420002b06715675963cfab48ed2597Robert Walsh dd = pd->port_dd; 14197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 142070c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* variable access in ipath_poll_hdrqfull() needs this */ 142170c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones rmb(); 142270c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pollflag = ipath_poll_hdrqfull(pd); 142370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 14247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan head = ipath_read_ureg32(dd, ur_rcvhdrhead, pd->port_port); 1425c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell if (pd->port_rcvhdrtail_kvaddr) 1426c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell tail = ipath_get_rcvhdrtail(pd); 1427c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell else 1428c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell tail = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); 1429f2d042313e420002b06715675963cfab48ed2597Robert Walsh 143070c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones if (head != tail) 1431f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag |= POLLIN | POLLRDNORM; 143270c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones else { 143370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* this saves a spin_lock/unlock in interrupt handler */ 14347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan set_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag); 143570c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* flush waiting flag so we don't miss an event */ 143670c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones wmb(); 1437f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1438d8274869d742c3d8082e1428de47e54d12104928Dave Olson set_bit(pd->port_port + dd->ipath_r_intravail_shift, 1439f2d042313e420002b06715675963cfab48ed2597Robert Walsh &dd->ipath_rcvctrl); 1440f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1441f2d042313e420002b06715675963cfab48ed2597Robert Walsh ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 1442f2d042313e420002b06715675963cfab48ed2597Robert Walsh dd->ipath_rcvctrl); 1443f2d042313e420002b06715675963cfab48ed2597Robert Walsh 14449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (dd->ipath_rhdrhead_intr_off) /* arm rcv interrupt */ 1445f2d042313e420002b06715675963cfab48ed2597Robert Walsh ipath_write_ureg(dd, ur_rcvhdrhead, 1446f2d042313e420002b06715675963cfab48ed2597Robert Walsh dd->ipath_rhdrhead_intr_off | head, 1447f2d042313e420002b06715675963cfab48ed2597Robert Walsh pd->port_port); 14487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1449f2d042313e420002b06715675963cfab48ed2597Robert Walsh poll_wait(fp, &pd->port_wait, pt); 14507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 14517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1452f2d042313e420002b06715675963cfab48ed2597Robert Walsh return pollflag; 1453f2d042313e420002b06715675963cfab48ed2597Robert Walsh} 1454f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1455f2d042313e420002b06715675963cfab48ed2597Robert Walshstatic unsigned int ipath_poll(struct file *fp, 1456f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct poll_table_struct *pt) 1457f2d042313e420002b06715675963cfab48ed2597Robert Walsh{ 1458f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct ipath_portdata *pd; 1459f2d042313e420002b06715675963cfab48ed2597Robert Walsh unsigned pollflag; 1460f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1461f2d042313e420002b06715675963cfab48ed2597Robert Walsh pd = port_fp(fp); 1462f2d042313e420002b06715675963cfab48ed2597Robert Walsh if (!pd) 1463f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag = 0; 1464f2d042313e420002b06715675963cfab48ed2597Robert Walsh else if (pd->poll_type & IPATH_POLL_TYPE_URGENT) 1465f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag = ipath_poll_urgent(pd, fp, pt); 1466f2d042313e420002b06715675963cfab48ed2597Robert Walsh else 1467f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag = ipath_poll_next(pd, fp, pt); 14687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1469e35d710d0c5b74bc9833d6a3791706bd577a3724Bryan O'Sullivan return pollflag; 14707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 14717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14720df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbagestatic int ipath_supports_subports(int user_swmajor, int user_swminor) 14730df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage{ 14740df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* no subport implementation prior to software version 1.3 */ 14750df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return (user_swmajor > 1) || (user_swminor >= 3); 14760df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage} 14770df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage 14780df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbagestatic int ipath_compatible_subports(int user_swmajor, int user_swminor) 14790df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage{ 14800df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* this code is written long-hand for clarity */ 14810df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (IPATH_USER_SWMAJOR != user_swmajor) { 14820df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* no promise of compatibility if major mismatch */ 14830df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return 0; 14840df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage } 14850df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (IPATH_USER_SWMAJOR == 1) { 14860df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage switch (IPATH_USER_SWMINOR) { 14870df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage case 0: 14880df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage case 1: 14890df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage case 2: 14900df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* no subport implementation so cannot be compatible */ 14910df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return 0; 14920df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage case 3: 14930df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* 3 is only compatible with itself */ 14940df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return user_swminor == 3; 14950df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage default: 14960df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* >= 4 are compatible (or are expected to be) */ 14970df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return user_swminor >= 4; 14980df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage } 14990df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage } 15000df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* make no promises yet for future major versions */ 15010df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return 0; 15020df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage} 15030df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage 15049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int init_subports(struct ipath_devdata *dd, 15059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd, 15069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 15079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 15089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret = 0; 1509c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage unsigned num_subports; 15109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t size; 15119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 15129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 1513bacf4013530e7fc230a8aa0c6ea3c17fc2f47665Mark Debbage * If the user is requesting zero subports, 15149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * skip the subport allocation. 15159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 1516bacf4013530e7fc230a8aa0c6ea3c17fc2f47665Mark Debbage if (uinfo->spu_subport_cnt <= 0) 15179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 1518c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage 15190df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* Self-consistency check for ipath_compatible_subports() */ 15200df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (ipath_supports_subports(IPATH_USER_SWMAJOR, IPATH_USER_SWMINOR) && 15210df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage !ipath_compatible_subports(IPATH_USER_SWMAJOR, 15220df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage IPATH_USER_SWMINOR)) { 1523c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage dev_info(&dd->pcidev->dev, 15240df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage "Inconsistent ipath_compatible_subports()\n"); 15250df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage goto bail; 15260df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage } 15270df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage 15280df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* Check for subport compatibility */ 15290df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (!ipath_compatible_subports(uinfo->spu_userversion >> 16, 15300df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage uinfo->spu_userversion & 0xffff)) { 15310df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage dev_info(&dd->pcidev->dev, 15320df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage "Mismatched user version (%d.%d) and driver " 15330df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage "version (%d.%d) while port sharing. Ensure " 1534c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage "that driver and library are from the same " 1535c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage "release.\n", 15360df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage (int) (uinfo->spu_userversion >> 16), 1537c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage (int) (uinfo->spu_userversion & 0xffff), 15380df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage IPATH_USER_SWMAJOR, 1539c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage IPATH_USER_SWMINOR); 1540c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage goto bail; 1541c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } 15420a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (uinfo->spu_subport_cnt > INFINIPATH_MAX_SUBPORT) { 15439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 15449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 15459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 15469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1547c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage num_subports = uinfo->spu_subport_cnt; 1548c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->subport_uregbase = vmalloc(PAGE_SIZE * num_subports); 15499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->subport_uregbase) { 15509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENOMEM; 15519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 15529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 15539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Note: pd->port_rcvhdrq_size isn't initialized yet. */ 15549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize * 1555c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage sizeof(u32), PAGE_SIZE) * num_subports; 15569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->subport_rcvhdr_base = vmalloc(size); 15579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->subport_rcvhdr_base) { 15589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENOMEM; 15599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail_ureg; 15609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 15619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 15629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->subport_rcvegrbuf = vmalloc(pd->port_rcvegrbuf_chunks * 15639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf_size * 1564c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage num_subports); 15659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->subport_rcvegrbuf) { 15669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENOMEM; 15679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail_rhdr; 15689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 15699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 15709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_subport_cnt = uinfo->spu_subport_cnt; 15719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_subport_id = uinfo->spu_subport_id; 15729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->active_slaves = 1; 1573947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell set_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag); 1574c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage memset(pd->subport_uregbase, 0, PAGE_SIZE * num_subports); 1575c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage memset(pd->subport_rcvhdr_base, 0, size); 1576c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage memset(pd->subport_rcvegrbuf, 0, pd->port_rcvegrbuf_chunks * 1577c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvegrbuf_size * 1578c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage num_subports); 15799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 15809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 15819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail_rhdr: 15829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vfree(pd->subport_rcvhdr_base); 15839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail_ureg: 15849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vfree(pd->subport_uregbase); 15859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->subport_uregbase = NULL; 15869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 15879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 15889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 15899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 15907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int try_alloc_port(struct ipath_devdata *dd, int port, 15919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct file *fp, 15929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 15937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 15949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd; 15957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 15967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!(pd = dd->ipath_pd[port])) { 15989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan void *ptmp; 15997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd = kzalloc(sizeof(struct ipath_portdata), GFP_KERNEL); 16017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 16037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Allocate memory for use in ipath_tid_update() just once 16047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * at open, not per call. Reduces cost of expected send 16057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * setup. 16067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 16077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ptmp = kmalloc(dd->ipath_rcvtidcnt * sizeof(u16) + 16087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidcnt * sizeof(struct page **), 16097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan GFP_KERNEL); 16109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd || !ptmp) { 16117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Unable to allocate portdata " 16127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "memory, failing open\n"); 16137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 16149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(pd); 16157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kfree(ptmp); 16167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_pd[port] = pd; 16197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_port = port; 16207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_dd = dd; 16217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_tid_pg_list = ptmp; 16227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan init_waitqueue_head(&dd->ipath_pd[port]->port_wait); 16237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_cnt) { 16259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->userversion = uinfo->spu_userversion; 16269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan init_user_egr_sizes(pd); 16279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if ((ret = init_subports(dd, pd, uinfo)) != 0) 16289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 16297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] opened unit:port %u:%u\n", 16307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, dd->ipath_unit, 16317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan port); 16329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_cnt = 1; 16339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan port_fp(fp) = pd; 16349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_pid = current->pid; 16359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan strncpy(pd->port_comm, current->comm, sizeof(pd->port_comm)); 1636c4b4d16e090e1b68d1d4d20a28757070982b9725Ralph Campbell ipath_chg_pioavailkernel(dd, 1637c4b4d16e090e1b68d1d4d20a28757070982b9725Ralph Campbell dd->ipath_pbufsport * (pd->port_port - 1), 1638c4b4d16e090e1b68d1d4d20a28757070982b9725Ralph Campbell dd->ipath_pbufsport, 0); 16397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_ports++; 16407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 16419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else 16429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EBUSY; 16437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 16457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 16467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 16477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic inline int usable(struct ipath_devdata *dd) 16497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 16507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return dd && 16517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (dd->ipath_flags & IPATH_PRESENT) && 16527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_kregbase && 16537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_lid && 16547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan !(dd->ipath_flags & (IPATH_LINKDOWN | IPATH_DISABLED 16557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan | IPATH_LINKUNK)); 16567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 16577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int find_free_port(int unit, struct file *fp, 16599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 16607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 16617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(unit); 16627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret, i; 16637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd) { 16657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENODEV; 16667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!usable(dd)) { 16707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENETDOWN; 16717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan for (i = 1; i < dd->ipath_cfgports; i++) { 16759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = try_alloc_port(dd, i, fp, uinfo); 16767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret != -EBUSY) 16777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 16807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 16827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 16837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 16847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int find_best_unit(struct file *fp, 16869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 16877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 16887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0, i, prefunit = -1, devmax; 16897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int maxofallports, npresent, nup; 16907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ndev; 16917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan devmax = ipath_count_units(&npresent, &nup, &maxofallports); 16937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 16957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This code is present to allow a knowledgeable person to 16967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * specify the layout of processes to processors before opening 16977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * this driver, and then we'll assign the process to the "closest" 1698525d0ca1d452ed336c1d907fb20c104467a8a47bBryan O'Sullivan * InfiniPath chip to that processor (we assume reasonable connectivity, 16997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for now). This code assumes that if affinity has been set 17007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * before this point, that at most one cpu is set; for now this 17017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * is reasonable. I check for both cpus_empty() and cpus_full(), 17027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in case some kernel variant sets none of the bits when no 17037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * affinity is set. 2.6.11 and 12 kernels have all present 17047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * cpus set. Some day we'll have to fix it up further to handle 1705525d0ca1d452ed336c1d907fb20c104467a8a47bBryan O'Sullivan * a cpu subset. This algorithm fails for two HT chips connected 17067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in tunnel fashion. Eventually this needs real topology 17077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * information. There may be some issues with dual core numbering 17087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * as well. This needs more work prior to release. 17097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 17107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cpus_empty(current->cpus_allowed) && 17117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan !cpus_full(current->cpus_allowed)) { 1712f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan int ncpus = num_online_cpus(), curcpu = -1, nset = 0; 17137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ncpus; i++) 17147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cpu_isset(i, current->cpus_allowed)) { 17157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] affinity set for " 1716f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan "cpu %d/%d\n", current->comm, 1717f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan current->pid, i, ncpus); 17187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan curcpu = i; 1719f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan nset++; 17207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1721f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan if (curcpu != -1 && nset != ncpus) { 17227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (npresent) { 17237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit = curcpu / (ncpus / npresent); 1724c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage ipath_cdbg(PROC,"%s[%u] %d chips, %d cpus, " 17257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%d cpus/chip, select unit %d\n", 17267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, 17277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan npresent, ncpus, ncpus / npresent, 17287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit); 17297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 17347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * user ports start at 1, kernel port is 0 17357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * For now, we do round-robin access across all chips 17367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 17377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (prefunit != -1) 17397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan devmax = prefunit + 1; 17407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanrecheck: 17417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 1; i < maxofallports; i++) { 17427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (ndev = prefunit != -1 ? prefunit : 0; ndev < devmax; 17437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ndev++) { 17447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(ndev); 17457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!usable(dd)) 17477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; /* can't use this unit */ 17487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (i >= dd->ipath_cfgports) 17497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 17507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Maxed out on users of this unit. Try 17517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * next. 17527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 17537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 17549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = try_alloc_port(dd, i, fp, uinfo); 17557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!ret) 17567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 17577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (npresent) { 17617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (nup == 0) { 17627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENETDOWN; 17637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No ports available (none initialized " 17647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "and ready)\n"); 17657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 17667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (prefunit > 0) { 17677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* if started above 0, retry from 0 */ 17687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, 17697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%s[%u] no ports on prefunit " 17707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%d, clear and re-check\n", 17717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, 17727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit); 17737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan devmax = ipath_count_units(NULL, NULL, 17747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan NULL); 17757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit = -1; 17767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto recheck; 17777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 17797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No ports available\n"); 17807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 17827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENXIO; 17837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No boards found\n"); 17847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 17877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 17887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 17897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int find_shared_port(struct file *fp, 17919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 17929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 17939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int devmax, ndev, i; 17949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret = 0; 17959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan devmax = ipath_count_units(NULL, NULL, NULL); 17979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan for (ndev = 0; ndev < devmax; ndev++) { 17999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(ndev); 18009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18015d1ce03dd335abaef50dc615137cac2a22c5cee0Dave Olson if (!usable(dd)) 18029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan continue; 18039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan for (i = 1; i < dd->ipath_cfgports; i++) { 18049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd = dd->ipath_pd[i]; 18059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Skip ports which are not yet open */ 18079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd || !pd->port_cnt) 18089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan continue; 18099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Skip port if it doesn't match the requested one */ 18109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (pd->port_subport_id != uinfo->spu_subport_id) 18119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan continue; 18129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Verify the sharing process matches the master */ 18139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (pd->port_subport_cnt != uinfo->spu_subport_cnt || 18149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->userversion != uinfo->spu_userversion || 18159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_cnt >= pd->port_subport_cnt) { 18169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 18179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 18189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan port_fp(fp) = pd; 18209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_fp(fp) = pd->port_cnt++; 1821755807a296f77ca7c31dc000afdfe1e5172bbf72Dave Olson pd->port_subpid[subport_fp(fp)] = current->pid; 18229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcursor_fp(fp) = 0; 18239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->active_slaves |= 1 << subport_fp(fp); 18249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(PROC, 18259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "%s[%u] %u sharing %s[%u] unit:port %u:%u\n", 18269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan current->comm, current->pid, 18279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_fp(fp), 18289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_comm, pd->port_pid, 18299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_unit, pd->port_port); 18309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = 1; 18319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 18329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivandone: 18369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 18379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 18389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_open(struct inode *in, struct file *fp) 18407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 1841c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan /* The real work is performed later in ipath_assign_port() */ 18429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan fp->private_data = kzalloc(sizeof(struct ipath_filedata), GFP_KERNEL); 18439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return fp->private_data ? 0 : -ENOMEM; 18449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 18459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1846c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan/* Get port early, so can set affinity prior to memory allocation */ 1847c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivanstatic int ipath_assign_port(struct file *fp, 18489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 18499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 18509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret; 18519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int i_minor; 18520df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage unsigned swmajor, swminor; 18539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Check to be sure we haven't already initialized this file */ 18559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (port_fp(fp)) { 18569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 18579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 18589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* for now, if major version is different, bail */ 18610df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage swmajor = uinfo->spu_userversion >> 16; 18620df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (swmajor != IPATH_USER_SWMAJOR) { 18639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_dbg("User major version %d not same as driver " 18649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "major %d\n", uinfo->spu_userversion >> 16, 18659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan IPATH_USER_SWMAJOR); 18669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENODEV; 18679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 18689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan swminor = uinfo->spu_userversion & 0xffff; 18719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (swminor != IPATH_USER_SWMINOR) 18729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_dbg("User minor version %d not same as driver " 18739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "minor %d\n", swminor, IPATH_USER_SWMINOR); 18747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_lock(&ipath_mutex); 18767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18770df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (ipath_compatible_subports(swmajor, swminor) && 18780df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage uinfo->spu_subport_cnt && 18799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (ret = find_shared_port(fp, uinfo))) { 18809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret > 0) 18819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = 0; 1882124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson goto done_chk_sdma; 18839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18851cfd6e648b5ea21b0d48bf6f18b129e4576557d5Josef Sipek i_minor = iminor(fp->f_path.dentry->d_inode) - IPATH_USER_MINOR_BASE; 18867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "open on dev %lx (minor %d)\n", 18871cfd6e648b5ea21b0d48bf6f18b129e4576557d5Josef Sipek (long)fp->f_path.dentry->d_inode->i_rdev, i_minor); 18887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (i_minor) 18909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = find_free_port(i_minor - 1, fp, uinfo); 18917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else 18929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = find_best_unit(fp, uinfo); 18937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1894124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olsondone_chk_sdma: 1895124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (!ret) { 1896124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct ipath_filedata *fd = fp->private_data; 1897124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson const struct ipath_portdata *pd = fd->pd; 1898124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson const struct ipath_devdata *dd = pd->port_dd; 1899124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 1900124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson fd->pq = ipath_user_sdma_queue_create(&dd->pcidev->dev, 1901124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson dd->ipath_unit, 1902124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson pd->port_port, 1903124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson fd->subport); 1904124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 1905124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (!fd->pq) 1906124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson ret = -ENOMEM; 1907124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson } 1908124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 19097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_unlock(&ipath_mutex); 19109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1911c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivandone: 1912c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan return ret; 1913c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan} 1914c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan 1915c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan 1916c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivanstatic int ipath_do_user_init(struct file *fp, 1917c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan const struct ipath_user_info *uinfo) 1918c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan{ 1919c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan int ret; 1920947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell struct ipath_portdata *pd = port_fp(fp); 1921c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan struct ipath_devdata *dd; 1922c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan u32 head32; 19239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1924947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell /* Subports don't need to initialize anything since master did it. */ 1925947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell if (subport_fp(fp)) { 1926947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell ret = wait_event_interruptible(pd->port_wait, 1927947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell !test_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag)); 1928947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell goto done; 1929947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell } 1930947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell 19319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd = pd->port_dd; 19329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 19339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (uinfo->spu_rcvhdrsize) { 19349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_setrcvhdrsize(dd, uinfo->spu_rcvhdrsize); 19359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret) 19369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 19379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 19389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 19399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* for now we do nothing with rcvhdrcnt: uinfo->spu_rcvhdrcnt */ 19409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 19419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* for right now, kernel piobufs are at end, so port 1 is at 0 */ 19429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_piobufs = dd->ipath_piobufbase + 19439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_pbufsport * (pd->port_port - 1) * dd->ipath_palign; 19449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(VERBOSE, "Set base of piobufs for port %u to 0x%x\n", 19459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, pd->port_piobufs); 19469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 19479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 19489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Now allocate the rcvhdr Q and eager TIDs; skip the TID 19499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * array for time being. If pd->port_port > chip-supported, 19509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * we need to do extra stuff here to handle by handling overflow 19519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * through port 0, someday 19529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 19539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_create_rcvhdrq(dd, pd); 19549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!ret) 19559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_create_user_egr(pd); 19569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret) 19579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 19589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 19599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 19609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * set the eager head register for this port to the current values 19619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * of the tail pointers, since we don't know if they were 19629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * updated on last use of the port. 19639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 19649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan head32 = ipath_read_ureg32(dd, ur_rcvegrindextail, pd->port_port); 19659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_write_ureg(dd, ur_rcvegrindexhead, head32, pd->port_port); 1966755807a296f77ca7c31dc000afdfe1e5172bbf72Dave Olson pd->port_lastrcvhdrqtail = -1; 19679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(VERBOSE, "Wrote port%d egrhead %x from tail regs\n", 19689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, head32); 19699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_tidcursor = 0; /* start at beginning after open */ 197070c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 197170c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* initialize poll variables... */ 197270c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_urgent = 0; 197370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_urgent_poll = 0; 197470c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_hdrqfull_poll = pd->port_hdrqfull; 197570c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 19769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 19779355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * Now enable the port for receive. 19789355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * For chips that are set to DMA the tail register to memory 19799355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * when they change (and when the update bit transitions from 19809355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * 0 to 1. So for those chips, we turn it off and then back on. 19819355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * This will (very briefly) affect any other open ports, but the 19829355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * duration is very short, and therefore isn't an issue. We 19839355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * explictly set the in-memory tail copy to 0 beforehand, so we 19849355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * don't have to wait to be sure the DMA update has happened 19859355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * (chip resets head/tail to 0 on transition to enable). 19869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 1987d8274869d742c3d8082e1428de47e54d12104928Dave Olson set_bit(dd->ipath_r_portenable_shift + pd->port_port, 19889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan &dd->ipath_rcvctrl); 19899355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell if (!(dd->ipath_flags & IPATH_NODMA_RTAIL)) { 19909355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell if (pd->port_rcvhdrtail_kvaddr) 19919355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell ipath_clear_rcvhdrtail(pd); 19929355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 1993d8274869d742c3d8082e1428de47e54d12104928Dave Olson dd->ipath_rcvctrl & 1994d8274869d742c3d8082e1428de47e54d12104928Dave Olson ~(1ULL << dd->ipath_r_tailupd_shift)); 19959355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell } 19969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 19979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_rcvctrl); 1998947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell /* Notify any waiting slaves */ 1999947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell if (pd->port_subport_cnt) { 2000947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell clear_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag); 2001947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell wake_up(&pd->port_wait); 2002947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell } 20039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivandone: 20047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 20057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 20067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 20087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * unlock_exptid - unlock any expected TID entries port still had in use 20097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: port 20107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 20117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We don't actually update the chip here, because we do a bulk update 20127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * below, using ipath_f_clear_tids. 20137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 20147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void unlock_expected_tids(struct ipath_portdata *pd) 20157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 20167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 20177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int port_tidbase = pd->port_port * dd->ipath_rcvtidcnt; 20187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, cnt = 0, maxtid = port_tidbase + dd->ipath_rcvtidcnt; 20197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port %u unlocking any locked expTID pages\n", 20217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port); 20227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = port_tidbase; i < maxtid; i++) { 20239355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell struct page *ps = dd->ipath_pageshadow[i]; 20249355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell 20259355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell if (!ps) 20267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 20277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20289355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell dd->ipath_pageshadow[i] = NULL; 20291fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pci_unmap_page(dd->pcidev, dd->ipath_physshadow[i], 20301fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PAGE_SIZE, PCI_DMA_FROMDEVICE); 20319355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell ipath_release_user_pages_on_close(&ps, 1); 20327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt++; 20337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 20347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 20357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cnt) 20367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port %u locked %u expTID entries\n", 20377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, cnt); 20387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ipath_stats.sps_pagelocks || ipath_stats.sps_pageunlocks) 20407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "%llu pages locked, %llu unlocked\n", 20417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) ipath_stats.sps_pagelocks, 20427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) 20437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks); 20447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 20457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_close(struct inode *in, struct file *fp) 20477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 20487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 20499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_filedata *fd; 20507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 20517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 20527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned port; 20537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "close on dev %lx, private data %p\n", 20557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (long)in->i_rdev, fp->private_data); 20567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_lock(&ipath_mutex); 20587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan fd = (struct ipath_filedata *) fp->private_data; 20607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan fp->private_data = NULL; 20619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd = fd->pd; 20629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd) { 20639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan mutex_unlock(&ipath_mutex); 20649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 20659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 2066124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2067124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson dd = pd->port_dd; 2068124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2069124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson /* drain user sdma queue */ 2070124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson ipath_user_sdma_queue_drain(dd, fd->pq); 2071124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson ipath_user_sdma_queue_destroy(fd->pq); 2072124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 20739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (--pd->port_cnt) { 20749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 20759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * XXX If the master closes the port before the slave(s), 20769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * revoke the mmap for the eager receive queue so 20779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * the slave(s) don't wait for receive data forever. 20789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 20799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->active_slaves &= ~(1 << fd->subport); 2080755807a296f77ca7c31dc000afdfe1e5172bbf72Dave Olson pd->port_subpid[fd->subport] = 0; 20819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan mutex_unlock(&ipath_mutex); 20829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 20839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 20849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan port = pd->port_port; 20857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_hdrqfull) { 20877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] had %u rcvhdrqfull errors " 20887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "during run\n", pd->port_comm, pd->port_pid, 20897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_hdrqfull); 20907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_hdrqfull = 0; 20917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 20927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_rcvwait_to || pd->port_piowait_to 20947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan || pd->port_rcvnowait || pd->port_pionowait) { 20957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "port%u, %u rcv, %u pio wait timeo; " 20967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%u rcv %u, pio already\n", 20977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, pd->port_rcvwait_to, 20987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_piowait_to, pd->port_rcvnowait, 20997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pionowait); 21007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvwait_to = pd->port_piowait_to = 21017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvnowait = pd->port_pionowait = 0; 21027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_flag) { 2104bb9171448deb1f7ece27674e2e431e4f267fd453Arthur Jones ipath_cdbg(PROC, "port %u port_flag set: 0x%lx\n", 21057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, pd->port_flag); 21067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_flag = 0; 21077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_kregbase) { 211035783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan int i; 211170c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* atomically clear receive enable port and intr avail. */ 2112d8274869d742c3d8082e1428de47e54d12104928Dave Olson clear_bit(dd->ipath_r_portenable_shift + port, 211335783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan &dd->ipath_rcvctrl); 2114d8274869d742c3d8082e1428de47e54d12104928Dave Olson clear_bit(pd->port_port + dd->ipath_r_intravail_shift, 211570c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones &dd->ipath_rcvctrl); 211635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg( dd, dd->ipath_kregs->kr_rcvctrl, 211735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_rcvctrl); 211835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan /* and read back from chip to be sure that nothing 211935783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * else is in flight when we do the rest */ 212035783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan (void)ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); 21217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* clean up the pkeys for this port user */ 21237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_clean_part_key(pd, dd); 212435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan /* 212535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * be paranoid, and never write 0's to these, just use an 212635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * unused part of the port 0 tail page. Of course, 212735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * rcvhdraddr points to a large chunk of memory, so this 212835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * could still trash things, but at least it won't trash 212935783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * page 0, and by disabling the port, it should stop "soon", 213035783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * even if a packet or two is in already in flight after we 213135783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * disabled the port. 213235783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan */ 213335783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg_port(dd, 213435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_kregs->kr_rcvhdrtailaddr, port, 213535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_dummy_hdrq_phys); 213635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdraddr, 213735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan pd->port_port, dd->ipath_dummy_hdrq_phys); 213835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan 213935783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan i = dd->ipath_pbufsport * (port - 1); 214035783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_disarm_piobufs(dd, i, dd->ipath_pbufsport); 2141c4b4d16e090e1b68d1d4d20a28757070982b9725Ralph Campbell ipath_chg_pioavailkernel(dd, i, dd->ipath_pbufsport, 1); 214235783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan 21431fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_f_clear_tids(dd, pd->port_port); 21441fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan 214535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan if (dd->ipath_pageshadow) 214635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan unlock_expected_tids(pd); 214735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_stats.sps_ports--; 214835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] closed port %u:%u\n", 214935783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan pd->port_comm, pd->port_pid, 215035783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_unit, port); 21517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pid = 0; 2154f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dd->ipath_pd[pd->port_port] = NULL; /* before releasing mutex */ 21557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_unlock(&ipath_mutex); 2156f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ipath_free_pddata(dd, pd); /* after releasing the mutex */ 21577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 21599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(fd); 21607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 21617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 21627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_port_info(struct ipath_portdata *pd, u16 subport, 21647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_port_info __user *uinfo) 21657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 21667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_port_info info; 21677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int nup; 21687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 21699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t sz; 21707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void) ipath_count_units(NULL, &nup, NULL); 21727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.num_active = nup; 21737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.unit = pd->port_dd->ipath_unit; 21747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.port = pd->port_port; 21759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan info.subport = subport; 21769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Don't return new fields if old library opened the port. */ 21770df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (ipath_supports_subports(pd->userversion >> 16, 21780df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage pd->userversion & 0xffff)) { 21799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Number of user ports available for this device. */ 21809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan info.num_ports = pd->port_dd->ipath_cfgports - 1; 21819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan info.num_subports = pd->port_subport_cnt; 21829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan sz = sizeof(info); 21839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else 21849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan sz = sizeof(info) - 2 * sizeof(u16); 21857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (copy_to_user(uinfo, &info, sz)) { 21877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 21887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 21897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 21917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 21937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 21947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 21957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_get_slave_info(struct ipath_portdata *pd, 21979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan void __user *slave_mask_addr) 21989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 21999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret = 0; 22009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 22019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (copy_to_user(slave_mask_addr, &pd->active_slaves, sizeof(u32))) 22029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EFAULT; 22039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 22049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 22059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 2206124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olsonstatic int ipath_sdma_get_inflight(struct ipath_user_sdma_queue *pq, 2207124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson u32 __user *inflightp) 2208124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson{ 2209124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson const u32 val = ipath_user_sdma_inflight_counter(pq); 2210124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2211124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (put_user(val, inflightp)) 2212124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return -EFAULT; 2213124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2214124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return 0; 2215124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson} 2216124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2217124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olsonstatic int ipath_sdma_get_complete(struct ipath_devdata *dd, 2218124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct ipath_user_sdma_queue *pq, 2219124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson u32 __user *completep) 2220124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson{ 2221124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson u32 val; 2222124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson int err; 2223124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2224124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson err = ipath_user_sdma_make_progress(dd, pq); 2225124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (err < 0) 2226124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return err; 2227124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2228124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson val = ipath_user_sdma_complete_counter(pq); 2229124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (put_user(val, completep)) 2230124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return -EFAULT; 2231124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2232124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return 0; 2233124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson} 2234124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 22357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic ssize_t ipath_write(struct file *fp, const char __user *data, 22367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t count, loff_t *off) 22377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 22387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_cmd __user *ucmd; 22397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 22407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const void __user *src; 22417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t consumed, copy; 22427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_cmd cmd; 22437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ssize_t ret = 0; 22447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan void *dest; 22457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (count < sizeof(cmd.type)) { 22477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 22487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 22497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 22507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ucmd = (const struct ipath_cmd __user *) data; 22527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_from_user(&cmd.type, &ucmd->type, sizeof(cmd.type))) { 22547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 22557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 22567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 22577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan consumed = sizeof(cmd.type); 22597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan switch (cmd.type) { 2261c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case IPATH_CMD_ASSIGN_PORT: 2262c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case __IPATH_CMD_USER_INIT: 22637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_USER_INIT: 22647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.user_info); 22657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.user_info; 22667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.user_info; 22677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_RECV_CTRL: 22697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.recv_ctrl); 22707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.recv_ctrl; 22717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.recv_ctrl; 22727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_PORT_INFO: 22747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.port_info); 22757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.port_info; 22767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.port_info; 22777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_UPDATE: 22797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_FREE: 22807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.tid_info); 22817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.tid_info; 22827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.tid_info; 22837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_SET_PART_KEY: 22857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.part_key); 22867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.part_key; 22877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.part_key; 22887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 2289c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage case __IPATH_CMD_SLAVE_INFO: 22909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan copy = sizeof(cmd.cmd.slave_mask_addr); 22919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dest = &cmd.cmd.slave_mask_addr; 22929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan src = &ucmd->cmd.slave_mask_addr; 22939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan break; 2294569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones case IPATH_CMD_PIOAVAILUPD: // force an update of PIOAvail reg 2295569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones copy = 0; 2296569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones src = NULL; 2297569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones dest = NULL; 2298569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones break; 2299f2d042313e420002b06715675963cfab48ed2597Robert Walsh case IPATH_CMD_POLL_TYPE: 2300f2d042313e420002b06715675963cfab48ed2597Robert Walsh copy = sizeof(cmd.cmd.poll_type); 2301f2d042313e420002b06715675963cfab48ed2597Robert Walsh dest = &cmd.cmd.poll_type; 2302f2d042313e420002b06715675963cfab48ed2597Robert Walsh src = &ucmd->cmd.poll_type; 2303f2d042313e420002b06715675963cfab48ed2597Robert Walsh break; 23046ac50727bda29e961385e4c40318dadbb5730193Dave Olson case IPATH_CMD_ARMLAUNCH_CTRL: 23056ac50727bda29e961385e4c40318dadbb5730193Dave Olson copy = sizeof(cmd.cmd.armlaunch_ctrl); 23066ac50727bda29e961385e4c40318dadbb5730193Dave Olson dest = &cmd.cmd.armlaunch_ctrl; 23076ac50727bda29e961385e4c40318dadbb5730193Dave Olson src = &ucmd->cmd.armlaunch_ctrl; 23086ac50727bda29e961385e4c40318dadbb5730193Dave Olson break; 2309124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson case IPATH_CMD_SDMA_INFLIGHT: 2310124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson copy = sizeof(cmd.cmd.sdma_inflight); 2311124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson dest = &cmd.cmd.sdma_inflight; 2312124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson src = &ucmd->cmd.sdma_inflight; 2313124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson break; 2314124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson case IPATH_CMD_SDMA_COMPLETE: 2315124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson copy = sizeof(cmd.cmd.sdma_complete); 2316124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson dest = &cmd.cmd.sdma_complete; 2317124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson src = &ucmd->cmd.sdma_complete; 2318124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson break; 23197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan default: 23207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 23217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 23227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 23237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2324569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones if (copy) { 2325569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones if ((count - consumed) < copy) { 2326569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones ret = -EINVAL; 2327569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones goto bail; 2328569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones } 23297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2330569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones if (copy_from_user(dest, src, copy)) { 2331569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones ret = -EFAULT; 2332569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones goto bail; 2333569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones } 2334569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones 2335569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones consumed += copy; 23367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 23377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 2339c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan if (!pd && cmd.type != __IPATH_CMD_USER_INIT && 2340c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan cmd.type != IPATH_CMD_ASSIGN_PORT) { 23419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 23429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 23439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 23447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan switch (cmd.type) { 2346c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case IPATH_CMD_ASSIGN_PORT: 2347c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan ret = ipath_assign_port(fp, &cmd.cmd.user_info); 2348c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan if (ret) 2349c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan goto bail; 2350c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan break; 2351c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case __IPATH_CMD_USER_INIT: 2352c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan /* backwards compatibility, get port first */ 2353c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan ret = ipath_assign_port(fp, &cmd.cmd.user_info); 2354c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan if (ret) 2355c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan goto bail; 2356c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan /* and fall through to current version. */ 23577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_USER_INIT: 23589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_do_user_init(fp, &cmd.cmd.user_info); 23599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret) 23607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 23617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_get_base_info( 23629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan fp, (void __user *) (unsigned long) 23637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cmd.cmd.user_info.spu_base_info, 23647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cmd.cmd.user_info.spu_base_info_size); 23657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 23667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_RECV_CTRL: 23679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_manage_rcvq(pd, subport_fp(fp), cmd.cmd.recv_ctrl); 23687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 23697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_PORT_INFO: 23709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_port_info(pd, subport_fp(fp), 23717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (struct ipath_port_info __user *) 23727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) cmd.cmd.port_info); 23737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 23747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_UPDATE: 23759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_tid_update(pd, fp, &cmd.cmd.tid_info); 23767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 23777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_FREE: 23789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_tid_free(pd, subport_fp(fp), &cmd.cmd.tid_info); 23797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 23807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_SET_PART_KEY: 23817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_set_part_key(pd, cmd.cmd.part_key); 23827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 2383c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage case __IPATH_CMD_SLAVE_INFO: 23849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_get_slave_info(pd, 23859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (void __user *) (unsigned long) 23869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan cmd.cmd.slave_mask_addr); 23879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan break; 2388569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones case IPATH_CMD_PIOAVAILUPD: 2389c4b4d16e090e1b68d1d4d20a28757070982b9725Ralph Campbell ipath_force_pio_avail_update(pd->port_dd); 2390569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones break; 2391f2d042313e420002b06715675963cfab48ed2597Robert Walsh case IPATH_CMD_POLL_TYPE: 2392f2d042313e420002b06715675963cfab48ed2597Robert Walsh pd->poll_type = cmd.cmd.poll_type; 2393f2d042313e420002b06715675963cfab48ed2597Robert Walsh break; 23946ac50727bda29e961385e4c40318dadbb5730193Dave Olson case IPATH_CMD_ARMLAUNCH_CTRL: 23956ac50727bda29e961385e4c40318dadbb5730193Dave Olson if (cmd.cmd.armlaunch_ctrl) 23966ac50727bda29e961385e4c40318dadbb5730193Dave Olson ipath_enable_armlaunch(pd->port_dd); 23976ac50727bda29e961385e4c40318dadbb5730193Dave Olson else 23986ac50727bda29e961385e4c40318dadbb5730193Dave Olson ipath_disable_armlaunch(pd->port_dd); 23996ac50727bda29e961385e4c40318dadbb5730193Dave Olson break; 2400124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson case IPATH_CMD_SDMA_INFLIGHT: 2401124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson ret = ipath_sdma_get_inflight(user_sdma_queue_fp(fp), 2402124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson (u32 __user *) (unsigned long) 2403124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson cmd.cmd.sdma_inflight); 2404124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson break; 2405124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson case IPATH_CMD_SDMA_COMPLETE: 2406124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson ret = ipath_sdma_get_complete(pd->port_dd, 2407124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson user_sdma_queue_fp(fp), 2408124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson (u32 __user *) (unsigned long) 2409124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson cmd.cmd.sdma_complete); 2410124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson break; 24117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret >= 0) 24147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = consumed; 24157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 24177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 24187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 24197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2420124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olsonstatic ssize_t ipath_writev(struct kiocb *iocb, const struct iovec *iov, 2421124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson unsigned long dim, loff_t off) 2422124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson{ 2423124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct file *filp = iocb->ki_filp; 2424124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct ipath_filedata *fp = filp->private_data; 2425124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct ipath_portdata *pd = port_fp(filp); 2426124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct ipath_user_sdma_queue *pq = fp->pq; 2427124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2428124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (!dim) 2429124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return -EINVAL; 2430124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2431124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return ipath_user_sdma_writev(pd->port_dd, pq, iov, dim); 2432124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson} 2433124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 24347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct class *ipath_class; 24357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24362b8693c0617e972fc0b2fd1ebf8de97e15b656c3Arjan van de Venstatic int init_cdev(int minor, char *name, const struct file_operations *fops, 24377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct cdev **cdevp, struct class_device **class_devp) 24387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 24397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const dev_t dev = MKDEV(IPATH_MAJOR, minor); 24407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct cdev *cdev = NULL; 24417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device *class_dev = NULL; 24427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 24437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev = cdev_alloc(); 24457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cdev) { 24467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME 24477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ": Could not allocate cdev for minor %d, %s\n", 24487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name); 24497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 24507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 24517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev->owner = THIS_MODULE; 24547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev->ops = fops; 24557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kobject_set_name(&cdev->kobj, name); 24567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = cdev_add(cdev, dev, 1); 24587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 24597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME 24607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ": Could not add cdev for minor %d, %s (err %d)\n", 24617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name, -ret); 24627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto err_cdev; 24637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan class_dev = class_device_create(ipath_class, NULL, dev, NULL, name); 24667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (IS_ERR(class_dev)) { 24687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = PTR_ERR(class_dev); 24697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not create " 24707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "class_dev for minor %d, %s (err %d)\n", 24717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name, -ret); 24727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto err_cdev; 24737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 24767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanerr_cdev: 24787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev_del(cdev); 24797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev = NULL; 24807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 24827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret >= 0) { 24837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = cdev; 24847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *class_devp = class_dev; 24857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 24867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = NULL; 24877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *class_devp = NULL; 24887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 24917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 24927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24932b8693c0617e972fc0b2fd1ebf8de97e15b656c3Arjan van de Venint ipath_cdev_init(int minor, char *name, const struct file_operations *fops, 24947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct cdev **cdevp, struct class_device **class_devp) 24957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 24967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return init_cdev(minor, name, fops, cdevp, class_devp); 24977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 24987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void cleanup_cdev(struct cdev **cdevp, 25007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device **class_devp) 25017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 25027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device *class_dev = *class_devp; 25037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (class_dev) { 25057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan class_device_unregister(class_dev); 25067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *class_devp = NULL; 25077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (*cdevp) { 25107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev_del(*cdevp); 25117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = NULL; 25127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 25147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanvoid ipath_cdev_cleanup(struct cdev **cdevp, 25167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device **class_devp) 25177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 25187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cleanup_cdev(cdevp, class_devp); 25197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 25207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct cdev *wildcard_cdev; 25227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct class_device *wildcard_class_dev; 25237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic const dev_t dev = MKDEV(IPATH_MAJOR, 0); 25257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int user_init(void) 25277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 25287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 25297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = register_chrdev_region(dev, IPATH_NMINORS, IPATH_DRV_NAME); 25317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 25327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not register " 25337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "chrdev region (err %d)\n", -ret); 25347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 25357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_class = class_create(THIS_MODULE, IPATH_DRV_NAME); 25387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (IS_ERR(ipath_class)) { 25407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = PTR_ERR(ipath_class); 25417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not create " 25427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "device class (err %d)\n", -ret); 25437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 25447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 25477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 25487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unregister_chrdev_region(dev, IPATH_NMINORS); 25497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 25507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 25517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 25527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void user_cleanup(void) 25547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 25557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ipath_class) { 25567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan class_destroy(ipath_class); 25577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_class = NULL; 25587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unregister_chrdev_region(dev, IPATH_NMINORS); 25617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 25627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic atomic_t user_count = ATOMIC_INIT(0); 25647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic atomic_t user_setup = ATOMIC_INIT(0); 25657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanint ipath_user_add(struct ipath_devdata *dd) 25677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 25687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan char name[10]; 25697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 25707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_inc_return(&user_count) == 1) { 25727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = user_init(); 25737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 25747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Unable to set up user support: " 25757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "error %d\n", -ret); 25767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 25777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = init_cdev(0, "ipath", &ipath_file_ops, &wildcard_cdev, 25797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &wildcard_class_dev); 25807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 25817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Could not create wildcard " 25827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "minor: error %d\n", -ret); 25830fd41363e0785247b7c19127318abc8b5eacc86bBryan O'Sullivan goto bail_user; 25847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_set(&user_setup, 1); 25877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan snprintf(name, sizeof(name), "ipath%d", dd->ipath_unit); 25907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = init_cdev(dd->ipath_unit + 1, name, &ipath_file_ops, 2592a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan &dd->user_cdev, &dd->user_class_dev); 25937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 25947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Could not create user minor %d, %s\n", 25957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_unit + 1, name); 25967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 25987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25990fd41363e0785247b7c19127318abc8b5eacc86bBryan O'Sullivanbail_user: 26007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan user_cleanup(); 26017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 26027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 26037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 26047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2605a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivanvoid ipath_user_remove(struct ipath_devdata *dd) 26067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 2607a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan cleanup_cdev(&dd->user_cdev, &dd->user_class_dev); 26087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 26097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_dec_return(&user_count) == 0) { 26107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_read(&user_setup) == 0) 26117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 26127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 26137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cleanup_cdev(&wildcard_cdev, &wildcard_class_dev); 26147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan user_cleanup(); 26157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 26167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_set(&user_setup, 0); 26177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 26187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 26197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return; 26207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 2621