ipath_file_ops.c revision 3d0890985ac4dff781b7feba19fedda547314749
17f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/* 2e7eacd36865ae0707f5efae8e4dda421ffcd1b66Ralph Campbell * Copyright (c) 2006, 2007, 2008 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> 42f2b9857eee17797541b845782ade4d7a9d50f843Jonathan Corbet#include <linux/smp_lock.h> 437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <asm/pgtable.h> 447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include "ipath_kernel.h" 4627b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan#include "ipath_common.h" 47124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson#include "ipath_user_sdma.h" 487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_open(struct inode *, struct file *); 507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_close(struct inode *, struct file *); 517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic ssize_t ipath_write(struct file *, const char __user *, size_t, 527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan loff_t *); 53124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olsonstatic ssize_t ipath_writev(struct kiocb *, const struct iovec *, 54124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson unsigned long , loff_t); 557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic unsigned int ipath_poll(struct file *, struct poll_table_struct *); 567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_mmap(struct file *, struct vm_area_struct *); 577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 582b8693c0617e972fc0b2fd1ebf8de97e15b656c3Arjan van de Venstatic const struct file_operations ipath_file_ops = { 597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .owner = THIS_MODULE, 607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .write = ipath_write, 61124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson .aio_write = ipath_writev, 627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .open = ipath_open, 637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .release = ipath_close, 647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .poll = ipath_poll, 657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .mmap = ipath_mmap 667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan}; 677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 680a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell/* 690a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell * Convert kernel virtual addresses to physical addresses so they don't 700a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell * potentially conflict with the chip addresses used as mmap offsets. 710a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell * It doesn't really matter what mmap offset we use as long as we can 720a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell * interpret it correctly. 730a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell */ 740a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbellstatic u64 cvt_kvaddr(void *p) 750a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell{ 760a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell struct page *page; 770a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell u64 paddr = 0; 780a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell 790a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell page = vmalloc_to_page(p); 800a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (page) 810a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell paddr = page_to_pfn(page) << PAGE_SHIFT; 820a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell 830a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell return paddr; 840a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell} 850a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell 869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_get_base_info(struct file *fp, 877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan void __user *ubase, size_t ubase_size) 887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd = port_fp(fp); 907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_base_info *kinfo = NULL; 927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned subport_cnt; 949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int shared, master; 959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t sz; 969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_cnt = pd->port_subport_cnt; 989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!subport_cnt) { 999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan shared = 0; 1009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan master = 0; 1019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_cnt = 1; 1029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 1039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan shared = 1; 1049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan master = !subport_fp(fp); 1059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 1067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan sz = sizeof(*kinfo); 1089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* If port sharing is not requested, allow the old size structure */ 1099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!shared) 110c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage sz -= 7 * sizeof(u64); 1119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ubase_size < sz) { 1127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, 1139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "Base size %zu, need %zu (version mismatch?)\n", 1149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ubase_size, sz); 1157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 1167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 1177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo = kzalloc(sizeof(*kinfo), GFP_KERNEL); 1207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (kinfo == NULL) { 1217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 1227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 1237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = dd->ipath_f_get_base_info(pd, kinfo); 1267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 1277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 1287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdr_cnt = dd->ipath_rcvhdrcnt; 1307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdrent_size = dd->ipath_rcvhdrentsize; 1317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_tidegrcnt = dd->ipath_rcvegrcnt; 1327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbufsize = dd->ipath_rcvegrbufsize; 1337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * have to mmap whole thing 1357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbuftotlen = 1377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size; 1387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrperchunk = pd->port_rcvegrbufs_perchunk; 1397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrchunksize = kinfo->spi_rcv_egrbuftotlen / 1407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_chunks; 1419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_tidcnt = dd->ipath_rcvtidcnt / subport_cnt; 1429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (master) 1439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_tidcnt += dd->ipath_rcvtidcnt % subport_cnt; 1447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for this use, may be ipath_cfgports summed over all chips that 1467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * are are configured and present 1477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_nports = dd->ipath_cfgports; 1497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* unit (chip/board) our port is on */ 1507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_unit = dd->ipath_unit; 1517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for now, only a single page */ 1527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_tid_maxsize = PAGE_SIZE; 1537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Doing this per port, and based on the skip value, etc. This has 1567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * to be the actual buffer size, since the protocol code treats it 1577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * as an array. 1587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 1597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * These have to be set to user addresses in the user code via mmap. 1607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * These values are used on return to user code for the mmap target 1617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * addresses only. For 32 bit, same 44 bit address problem, so use 1627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the physical address, not virtual. Before 2.6.11, using the 1637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * page_address() macro worked, but in 2.6.11, even that returns the 1647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * full 64 bit address (upper bits all 1's). So far, using the 1657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * physical addresses (or chip offsets, for chip mapping) works, but 1669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * no doubt some future kernel release will change that, and we'll be 1679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * on to yet another method of dealing with this. 1687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdr_base = (u64) pd->port_rcvhdrq_phys; 1709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_rcvhdr_tailaddr = (u64) pd->port_rcvhdrqtailaddr_phys; 1717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbufs = (u64) pd->port_rcvegr_phys; 1727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_pioavailaddr = (u64) dd->ipath_pioavailregs_phys; 1737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_status = (u64) kinfo->spi_pioavailaddr + 1747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) dd->ipath_statusp - 1757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) dd->ipath_pioavailregs_dma; 1769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!shared) { 177e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson kinfo->spi_piocnt = pd->port_piocnt; 1789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piobufbase = (u64) pd->port_piobufs; 1799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->__spi_uregbase = (u64) dd->ipath_uregbase + 180a18e26ae442001de62f6b84a923e8613347dc35fRalph Campbell dd->ipath_ureg_align * pd->port_port; 1819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (master) { 182e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson kinfo->spi_piocnt = (pd->port_piocnt / subport_cnt) + 183e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson (pd->port_piocnt % subport_cnt); 1849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Master's PIO buffers are after all the slave's */ 1859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piobufbase = (u64) pd->port_piobufs + 1869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign * 187e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson (pd->port_piocnt - kinfo->spi_piocnt); 1889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 1899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned slave = subport_fp(fp) - 1; 1907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 191e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson kinfo->spi_piocnt = pd->port_piocnt / subport_cnt; 1929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piobufbase = (u64) pd->port_piobufs + 1939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign * kinfo->spi_piocnt * slave; 194c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } 1951d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson 196c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage if (shared) { 197c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port_uregbase = (u64) dd->ipath_uregbase + 198a18e26ae442001de62f6b84a923e8613347dc35fRalph Campbell dd->ipath_ureg_align * pd->port_port; 199c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port_rcvegrbuf = kinfo->spi_rcv_egrbufs; 200c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port_rcvhdr_base = kinfo->spi_rcvhdr_base; 201c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port_rcvhdr_tailaddr = kinfo->spi_rcvhdr_tailaddr; 202c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage 2030a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell kinfo->__spi_uregbase = cvt_kvaddr(pd->subport_uregbase + 204c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage PAGE_SIZE * subport_fp(fp)); 2059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 2060a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell kinfo->spi_rcvhdr_base = cvt_kvaddr(pd->subport_rcvhdr_base + 207c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvhdrq_size * subport_fp(fp)); 208947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell kinfo->spi_rcvhdr_tailaddr = 0; 2090a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell kinfo->spi_rcv_egrbufs = cvt_kvaddr(pd->subport_rcvegrbuf + 210c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size * 211c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage subport_fp(fp)); 212c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage 213c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_subport_uregbase = 214c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage cvt_kvaddr(pd->subport_uregbase); 215c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_subport_rcvegrbuf = 216c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage cvt_kvaddr(pd->subport_rcvegrbuf); 217c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_subport_rcvhdr_base = 218c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage cvt_kvaddr(pd->subport_rcvhdr_base); 219c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage ipath_cdbg(PROC, "port %u flags %x %llx %llx %llx\n", 220c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port, kinfo->spi_runtime_flags, 221c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage (unsigned long long) kinfo->spi_subport_uregbase, 222c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage (unsigned long long) kinfo->spi_subport_rcvegrbuf, 223c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage (unsigned long long) kinfo->spi_subport_rcvhdr_base); 2249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 2259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 2261bf7724e093cf3071d943d53bfa4de8b8e50426bDave Olson /* 2271bf7724e093cf3071d943d53bfa4de8b8e50426bDave Olson * All user buffers are 2KB buffers. If we ever support 2281bf7724e093cf3071d943d53bfa4de8b8e50426bDave Olson * giving 4KB buffers to user processes, this will need some 2291bf7724e093cf3071d943d53bfa4de8b8e50426bDave Olson * work. 2301bf7724e093cf3071d943d53bfa4de8b8e50426bDave Olson */ 2311bf7724e093cf3071d943d53bfa4de8b8e50426bDave Olson kinfo->spi_pioindex = (kinfo->spi_piobufbase - 2321bf7724e093cf3071d943d53bfa4de8b8e50426bDave Olson (dd->ipath_piobufbase & 0xffffffff)) / dd->ipath_palign; 2337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_pioalign = dd->ipath_palign; 2347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_qpair = IPATH_KD_QP; 236826d801009fb3c82832f2d92149446cce354bf61Dave Olson /* 237826d801009fb3c82832f2d92149446cce354bf61Dave Olson * user mode PIO buffers are always 2KB, even when 4KB can 238826d801009fb3c82832f2d92149446cce354bf61Dave Olson * be received, and sent via the kernel; this is ibmaxlen 239826d801009fb3c82832f2d92149446cce354bf61Dave Olson * for 2K MTU. 240826d801009fb3c82832f2d92149446cce354bf61Dave Olson */ 241826d801009fb3c82832f2d92149446cce354bf61Dave Olson kinfo->spi_piosize = dd->ipath_piosize2k - 2 * sizeof(u32); 2427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_mtu = dd->ipath_ibmaxlen; /* maxlen, not ibmtu */ 2437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_port = pd->port_port; 2449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_subport = subport_fp(fp); 245eaf6733bc176742fb08def2269441684e963c275Bryan O'Sullivan kinfo->spi_sw_version = IPATH_KERN_SWVERSION; 2467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_hw_version = dd->ipath_revision; 2477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (master) { 2499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_runtime_flags |= IPATH_RUNTIME_MASTER; 2509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 2519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 252c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage sz = (ubase_size < sizeof(*kinfo)) ? ubase_size : sizeof(*kinfo); 253c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage if (copy_to_user(ubase, kinfo, sz)) 2547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 2557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 2577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kfree(kinfo); 2587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 2597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 2607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 2627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_tid_update - update a port TID 2637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 2649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * @fp: the ipath device file 2657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @ti: the TID information 2667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * The new implementation as of Oct 2004 is that the driver assigns 2687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the tid and returns it to the caller. To make it easier to 2697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * catch bugs, and to reduce search time, we keep a cursor for 2707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * each port, walking the shadow tid array to find one that's not 2717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in use. 2727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * For now, if we can't allocate the full list, we fail, although 2747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in the long run, we'll allocate as many as we can, and the 2757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * caller will deal with that by trying the remaining pages later. 2767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * That means that when we fail, we have to mark the tids as not in 2777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * use again, in our shadow copy. 2787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * It's up to the caller to free the tids when they are done. 2807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We'll unlock the pages as they free them. 2817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Also, right now we are locking one page at a time, but since 2837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the intended use of this routine is for a single group of 2847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * virtually contiguous pages, that should change to improve 2857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * performance. 2867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 2879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_tid_update(struct ipath_portdata *pd, struct file *fp, 2887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_tid_info *ti) 2897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 2907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0, ntids; 2919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan u32 tid, porttid, cnt, i, tidcnt, tidoff; 2927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u16 *tidlist; 2937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 2947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 physaddr; 2957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long vaddr; 2967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 __iomem *tidbase; 2977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long tidmap[8]; 2987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct page **pagep = NULL; 2999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned subport = subport_fp(fp); 3007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow) { 3027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 3037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt = ti->tidcnt; 3077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cnt) { 3087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("After copyin, tidcnt 0, tidlist %llx\n", 3097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) ti->tidlist); 3107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 3117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Should we treat as success? likely a bug 3127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 3147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid = pd->port_port * dd->ipath_rcvtidcnt; 3179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) { 3189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt; 3199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tid = pd->port_tidcursor; 3209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidoff = 0; 3219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (!subport) { 3229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) + 3239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_rcvtidcnt % pd->port_subport_cnt); 3249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidoff = dd->ipath_rcvtidcnt - tidcnt; 3259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += tidoff; 3269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tid = tidcursor_fp(fp); 3279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 3289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt; 3299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidoff = tidcnt * (subport - 1); 3309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += tidoff; 3319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tid = tidcursor_fp(fp); 3329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 3339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (cnt > tidcnt) { 3347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* make sure it all fits in port_tid_pg_list */ 3357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "Process tried to allocate %u " 3367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "TIDs, only trying max (%u)\n", cnt, tidcnt); 3377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt = tidcnt; 3387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pagep = &((struct page **) pd->port_tid_pg_list)[tidoff]; 3409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidlist = &((u16 *) &pagep[dd->ipath_rcvtidcnt])[tidoff]; 3417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan memset(tidmap, 0, sizeof(tidmap)); 3437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* before decrement; chip actual # */ 3447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ntids = tidcnt; 3457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidbase = (u64 __iomem *) (((char __iomem *) dd->ipath_kregbase) + 3467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidbase + 3477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid * sizeof(*tidbase)); 3487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port%u %u tids, cursor %u, tidbase %p\n", 3507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, cnt, tid, tidbase); 3517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* virtual address of first page in transfer */ 3537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vaddr = ti->tidvaddr; 3547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!access_ok(VERIFY_WRITE, (void __user *) vaddr, 3557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt * PAGE_SIZE)) { 3567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Fail vaddr %p, %u pages, !access_ok\n", 3577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *)vaddr, cnt); 3587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 3597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_get_user_pages(vaddr, cnt, pagep); 3627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) { 3637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret == -EBUSY) { 3647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to lock addr %p, %u pages " 3657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(already locked)\n", 3667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) vaddr, cnt); 3677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 3687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for now, continue, and see what happens but with 3697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the new implementation, this should never happen, 3707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * unless perhaps the user has mpin'ed the pages 3717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * themselves (something we need to test) 3727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 3747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 3757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 3767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "Failed to lock addr %p, %u pages: " 3777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "errno %d\n", (void *) vaddr, cnt, -ret); 3787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < cnt; i++, vaddr += PAGE_SIZE) { 3827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (; ntids--; tid++) { 3837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (tid == tidcnt) 3847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = 0; 3857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow[porttid + tid]) 3867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 3877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ntids < 0) { 3897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 3907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * oops, wrapped all the way through their TIDs, 3917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * and didn't have enough free; see comments at 3927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * start of routine 3937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Not enough free TIDs for %u pages " 3957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(index %d), failing\n", cnt, i); 3967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan i--; /* last tidlist[i] not filled in */ 3977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 3987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 3997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidlist[i] = tid + tidoff; 4017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Updating idx %u to TID %u, " 4029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "vaddr %lx\n", i, tid + tidoff, vaddr); 4037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* we "know" system pages and TID pages are same size */ 4047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[porttid + tid] = pagep[i]; 4051fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_physshadow[porttid + tid] = ipath_map_page( 4061fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->pcidev, pagep[i], 0, PAGE_SIZE, 4071fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PCI_DMA_FROMDEVICE); 4087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 4097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * don't need atomic or it's overhead 4107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan __set_bit(tid, tidmap); 4121fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan physaddr = dd->ipath_physshadow[porttid + tid]; 4137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pagelocks++; 4147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, 4157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "TID %u, vaddr %lx, physaddr %llx pgp %p\n", 4167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid, vaddr, (unsigned long long) physaddr, 4177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pagep[i]); 418f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger dd->ipath_f_put_tid(dd, &tidbase[tid], RCVHQ_RCV_TYPE_EXPECTED, 419f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger physaddr); 4207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 4217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * don't check this tid in ipath_portshadow, since we 4227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * just filled it in; start with the next one. 4237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid++; 4257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) { 4287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 limit; 4297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cleanup: 4307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* jump here if copy out of updated info failed... */ 4317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("After failure (ret=%d), undo %d of %d entries\n", 4327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan -ret, i, cnt); 4337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* same code that's in ipath_free_tid() */ 4347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = sizeof(tidmap) * BITS_PER_BYTE; 4357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (limit > tidcnt) 4367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* just in case size changes in future */ 4377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = tidcnt; 4387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = find_first_bit((const unsigned long *)tidmap, limit); 4397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (; tid < limit; tid++) { 4407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!test_bit(tid, tidmap)) 4417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 4427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pageshadow[porttid + tid]) { 4437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Freeing TID %u\n", 4447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid); 445f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger dd->ipath_f_put_tid(dd, &tidbase[tid], 446f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger RCVHQ_RCV_TYPE_EXPECTED, 4477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_tidinvalid); 4481fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pci_unmap_page(dd->pcidev, 4491fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_physshadow[porttid + tid], 4501fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PAGE_SIZE, PCI_DMA_FROMDEVICE); 4517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[porttid + tid] = NULL; 4527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 4537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_release_user_pages(pagep, cnt); 4567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 4577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 4587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Copy the updated array, with ipath_tid's filled in, back 4597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * to user. Since we did the copy in already, this "should 4607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * never fail" If it does, we have to clean up... 4617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user((void __user *) 4637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) ti->tidlist, 4647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidlist, cnt * sizeof(*tidlist))) { 4657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 4667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto cleanup; 4677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user((void __user *) (unsigned long) ti->tidmap, 4697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidmap, sizeof tidmap)) { 4707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 4717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto cleanup; 4727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (tid == tidcnt) 4747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = 0; 4759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) 4769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_tidcursor = tid; 4779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else 4789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcursor_fp(fp) = tid; 4797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 4827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 4837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to map %u TID pages, failing with %d\n", 4847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, -ret); 4857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 4867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 4877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 4897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_tid_free - free a port TID 4907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 4919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * @subport: the subport 4927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @ti: the TID info 4937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 4947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * right now we are unlocking one page at a time, but since 4957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the intended use of this routine is for a single group of 4967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * virtually contiguous pages, that should change to improve 4977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * performance. We check that the TID is in range for this port 4987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * but otherwise don't check validity; if user has an error and 4997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * frees the wrong tid, it's only their own data that can thereby 5007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * be corrupted. We do check that the TID was in use, for sanity 5017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We always use our idea of the saved address, not the address that 5027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * they pass in to us. 5037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 5047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_tid_free(struct ipath_portdata *pd, unsigned subport, 5067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_tid_info *ti) 5077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 5087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 5097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 tid, porttid, cnt, limit, tidcnt; 5107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 5117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 __iomem *tidbase; 5127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long tidmap[8]; 5137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow) { 5157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 5167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 5177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_from_user(tidmap, (void __user *)(unsigned long)ti->tidmap, 5207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan sizeof tidmap)) { 5217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 5227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 5237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid = pd->port_port * dd->ipath_rcvtidcnt; 5269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) 5279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt; 5289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (!subport) { 5299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) + 5309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_rcvtidcnt % pd->port_subport_cnt); 5319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += dd->ipath_rcvtidcnt - tidcnt; 5329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 5339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt; 5349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += tidcnt * (subport - 1); 5359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 5367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) + 5377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidbase + 5387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid * sizeof(*tidbase)); 5397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = sizeof(tidmap) * BITS_PER_BYTE; 5417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (limit > tidcnt) 5427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* just in case size changes in future */ 5437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = tidcnt; 5447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = find_first_bit(tidmap, limit); 5457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port%u free %u tids; first bit (max=%d) " 5467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "set is %d, porttid %u\n", pd->port_port, ti->tidcnt, 5477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit, tid, porttid); 5487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (cnt = 0; tid < limit; tid++) { 5497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 5507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * small optimization; if we detect a run of 3 or so without 5517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * any set, use find_first_bit again. That's mainly to 5527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * accelerate the case where we wrapped, so we have some at 5537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the beginning, and some at the end, and a big gap 5547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in the middle. 5557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 5567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!test_bit(tid, tidmap)) 5577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 5587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt++; 5597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pageshadow[porttid + tid]) { 5603ac8c70f74ca67111c570f4ba828cc4b6fc229f4Dave Olson struct page *p; 5613ac8c70f74ca67111c570f4ba828cc4b6fc229f4Dave Olson p = dd->ipath_pageshadow[porttid + tid]; 5623ac8c70f74ca67111c570f4ba828cc4b6fc229f4Dave Olson dd->ipath_pageshadow[porttid + tid] = NULL; 5637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "PID %u freeing TID %u\n", 56440d97692fbfe52ef68fa771d8121394b2210fd67Pavel Emelyanov pid_nr(pd->port_pid), tid); 565f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger dd->ipath_f_put_tid(dd, &tidbase[tid], 566f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger RCVHQ_RCV_TYPE_EXPECTED, 5677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_tidinvalid); 5681fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pci_unmap_page(dd->pcidev, 5691fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_physshadow[porttid + tid], 5701fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PAGE_SIZE, PCI_DMA_FROMDEVICE); 5713ac8c70f74ca67111c570f4ba828cc4b6fc229f4Dave Olson ipath_release_user_pages(&p, 1); 5727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 5737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else 5747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Unused tid %u, ignoring\n", tid); 5757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cnt != ti->tidcnt) 5777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("passed in tidcnt %d, only %d bits set in map\n", 5787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, cnt); 5797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 5807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 5817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to unmap %u TID pages, failing with %d\n", 5827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, -ret); 5837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 5847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 5857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 5877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_set_part_key - set a partition key 5887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 5897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @key: the key 5907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 5917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We can have up to 4 active at a time (other than the default, which is 5927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * always allowed). This is somewhat tricky, since multiple ports may set 5937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the same key, so we reference count them, and clean up at exit. All 4 5947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * partition keys are packed into a single infinipath register. It's an 5957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * error for a process to set the same pkey multiple times. We provide no 5967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * mechanism to de-allocate a pkey at this time, we may eventually need to 5977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * do that. I've used the atomic operations, and no locking, and only make 5987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * a single pass through what's available. This should be more than 5997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * adequate for some time. I'll think about spinlocks or the like if and as 6007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * it's necessary. 6017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_set_part_key(struct ipath_portdata *pd, u16 key) 6037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 6047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 6057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, any = 0, pidx = -1; 6067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u16 lkey = key & 0x7FFF; 6077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 6087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 60927b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan if (lkey == (IPATH_DEFAULT_P_KEY & 0x7FFF)) { 6107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* nothing to do; this key always valid */ 6117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 6127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u try to set pkey %hx, current keys " 6167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%hx:%x %hx:%x %hx:%x %hx:%x\n", 6177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, dd->ipath_pkeys[0], 6187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[0]), dd->ipath_pkeys[1], 6197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[1]), dd->ipath_pkeys[2], 6207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[2]), dd->ipath_pkeys[3], 6217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[3])); 6227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!lkey) { 6247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "p%u tries to set key 0, not allowed\n", 6257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port); 6267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 6277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 6317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Set the full membership bit, because it has to be 6327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * set in the register or the packet, and it seems 6337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * cleaner to set in the register than to force all 6347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * callers to set it. (see bug 4331) 6357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan key |= 0x8000; 6377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) { 6397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_pkeys[i] && pidx == -1) 6407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pidx = i; 6417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_pkeys[i] == key) { 6427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u tries to set same pkey " 6437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(%x) more than once\n", 6447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key); 6457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EEXIST; 6467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pidx == -1) { 6507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("All pkeys for port %u already in use, " 6517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 6527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 6537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) { 6567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pkeys[i]) { 6577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan any++; 6587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 6597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pkeys[i] == key) { 6617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_t *pkrefs = &dd->ipath_pkeyrefs[i]; 6627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_inc_return(pkrefs) > 1) { 6647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[pidx] = key; 6657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u set key %x " 6667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "matches #%d, count now %d\n", 6677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, i, 6687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(pkrefs)); 6697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 6707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 6727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 6737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * lost race, decrement count, catch below 6747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_dec(pkrefs); 6767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Lost race, count was " 6777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "0, after dec, it's %d\n", 6787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(pkrefs)); 6797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan any++; 6807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) { 6837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 6847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * It makes no sense to have both the limited and 6857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * full membership PKEY set at the same time since 6867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the unlimited one will disable the limited one. 6877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EEXIST; 6897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!any) { 6937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u, all pkeys already in use, " 6947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 6957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 6967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) { 6997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pkeys[i] && 7007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) { 7017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pkey; 7027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for ipathstats, etc. */ 7047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pkeys[i] = lkey; 7057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[pidx] = dd->ipath_pkeys[i] = key; 7067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pkey = 7077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (u64) dd->ipath_pkeys[0] | 7087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 7097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 7107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 7117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "p%u set key %x in #%d, " 7127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "portidx %d, new pkey reg %llx\n", 7137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, i, pidx, 7147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pkey); 7157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg( 7167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd, dd->ipath_kregs->kr_partitionkey, pkey); 7177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 7197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 7207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u, all pkeys already in use 2nd pass, " 7237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 7247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 7257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 7277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 7287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 7297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 7317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_manage_rcvq - manage a port's receive queue 7327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 7339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * @subport: the subport 7347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @start_stop: action to carry out 7357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 7367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * start_stop == 0 disables receive on the port, for use in queue 7377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * overflow conditions. start_stop==1 re-enables, to be used to 7387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * re-init the software copy of the head register 7397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 7409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_manage_rcvq(struct ipath_portdata *pd, unsigned subport, 7419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int start_stop) 7427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 7437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 7447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(PROC, "%sabling rcv for unit %u port %u:%u\n", 7467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan start_stop ? "en" : "dis", dd->ipath_unit, 7479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, subport); 7489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (subport) 7499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 7507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* atomically clear receive enable port. */ 7517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (start_stop) { 7527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 7537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * On enable, force in-memory copy of the tail register to 7547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 0, so that protocol code doesn't have to worry about 7557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * whether or not the chip has yet updated the in-memory 7567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * copy or not on return from the system call. The chip 7577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * always resets it's tail register back to 0 on a 7587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * transition from disabled to enabled. This could cause a 7597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * problem if software was broken, and did the enable w/o 7607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the disable, but eventually the in-memory copy will be 7617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * updated and correct itself, even in the face of software 7627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * bugs. 7637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 764c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell if (pd->port_rcvhdrtail_kvaddr) 765c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell ipath_clear_rcvhdrtail(pd); 766d8274869d742c3d8082e1428de47e54d12104928Dave Olson set_bit(dd->ipath_r_portenable_shift + pd->port_port, 7677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_rcvctrl); 7687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else 769d8274869d742c3d8082e1428de47e54d12104928Dave Olson clear_bit(dd->ipath_r_portenable_shift + pd->port_port, 7707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_rcvctrl); 7717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 7727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl); 7737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* now be sure chip saw it before we return */ 77444f8e3f3f7d8e61b4aafced278403955fe18ad88Roland Dreier ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); 7757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (start_stop) { 7767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 7777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * And try to be sure that tail reg update has happened too. 7787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This should in theory interlock with the RXE changes to 7797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the tail register. Don't assign it to the tail register 7807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in memory copy, since we could overwrite an update by the 7817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * chip if we did. 7827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 78344f8e3f3f7d8e61b4aafced278403955fe18ad88Roland Dreier ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); 7847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* always; new head should be equal to new tail; see above */ 7869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 7877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return 0; 7887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 7897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void ipath_clean_part_key(struct ipath_portdata *pd, 7917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd) 7927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 7937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, j, pchanged = 0; 7947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 oldpkey; 7957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for debugging only */ 7977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan oldpkey = (u64) dd->ipath_pkeys[0] | 7987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 7997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 8007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 8017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) { 8037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_pkeys[i]) 8047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 8057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "look for key[%d] %hx in pkeys\n", i, 8067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i]); 8077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (j = 0; j < ARRAY_SIZE(dd->ipath_pkeys); j++) { 8087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* check for match independent of the global bit */ 8097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((dd->ipath_pkeys[j] & 0x7fff) != 8107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (pd->port_pkeys[i] & 0x7fff)) 8117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 8127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_dec_and_test(&dd->ipath_pkeyrefs[j])) { 8137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u clear key " 8147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%x matches #%d\n", 8157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, 8167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i], j); 8177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pkeys[j] = 8187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pkeys[j] = 0; 8197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pchanged++; 8207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else ipath_cdbg( 8227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan VERBOSE, "p%u key %x matches #%d, " 8237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "but ref still %d\n", pd->port_port, 8247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i], j, 8257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[j])); 8267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 8277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i] = 0; 8297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pchanged) { 8317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pkey = (u64) dd->ipath_pkeys[0] | 8327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 8337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 8347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 8357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u old pkey reg %llx, " 8367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "new pkey reg %llx\n", pd->port_port, 8377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) oldpkey, 8387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pkey); 8397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey, 8407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pkey); 8417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 8437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan/* 8459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Initialize the port data with the receive buffer sizes 8469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * so this can be done while the master port is locked. 8479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Otherwise, there is a race with a slave opening the port 8489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * and seeing these fields uninitialized. 8499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 8509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic void init_user_egr_sizes(struct ipath_portdata *pd) 8519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 8529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 8539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned egrperchunk, egrcnt, size; 8549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 8559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 8569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * to avoid wasting a lot of memory, we allocate 32KB chunks of 8579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * physically contiguous memory, advance through it until used up 8589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * and then allocate more. Of course, we need memory to store those 8599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * extra pointers, now. Started out with 256KB, but under heavy 8609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * memory pressure (creating large files and then copying them over 8619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * NFS while doing lots of MPI jobs), we hit some allocation 8629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * failures, even though we can sleep... (2.6.10) Still get 8639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * failures at 64K. 32K is the lowest we can go without wasting 8649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * additional memory. 8659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 8669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = 0x8000; 8679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan egrperchunk = size / dd->ipath_rcvegrbufsize; 8689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan egrcnt = dd->ipath_rcvegrcnt; 8699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf_chunks = (egrcnt + egrperchunk - 1) / egrperchunk; 8709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbufs_perchunk = egrperchunk; 8719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf_size = size; 8729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 8739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 8747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 8757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_create_user_egr - allocate eager TID buffers 8767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port to allocate TID buffers for 8777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 8787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This routine is now quite different for user and kernel, because 8797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the kernel uses skb's, for the accelerated network performance 8807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This is the user port version 8817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 8827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Allocate the eager TID buffers and program them into infinipath 8837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * They are no longer completely contiguous, we do multiple allocation 8847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * calls. 8857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 8867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_create_user_egr(struct ipath_portdata *pd) 8877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 8887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 8899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned e, egrcnt, egrperchunk, chunk, egrsize, egroff; 8907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t size; 8917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 8920ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan gfp_t gfp_flags; 8930ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan 8940ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan /* 8950ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * GFP_USER, but without GFP_FS, so buffer cache can be 8960ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * coalesced (we hope); otherwise, even at order 4, 8970ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * heavy filesystem activity makes these fail, and we can 8980ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * use compound pages. 8990ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan */ 9000ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan gfp_flags = __GFP_WAIT | __GFP_IO | __GFP_COMP; 9017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egrcnt = dd->ipath_rcvegrcnt; 9037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* TID number offset for this port */ 90460948a415859cb859e24f0dfe739069d66577466Ralph Campbell egroff = (pd->port_port - 1) * egrcnt + dd->ipath_p0_rcvegrcnt; 9057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egrsize = dd->ipath_rcvegrbufsize; 9067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Allocating %d egr buffers, at egrtid " 9077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "offset %x, egrsize %u\n", egrcnt, egroff, egrsize); 9087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan chunk = pd->port_rcvegrbuf_chunks; 9109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan egrperchunk = pd->port_rcvegrbufs_perchunk; 9119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = pd->port_rcvegrbuf_size; 9129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf = kmalloc(chunk * sizeof(pd->port_rcvegrbuf[0]), 9139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan GFP_KERNEL); 9147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf) { 9157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 9167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 9177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys = 9199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kmalloc(chunk * sizeof(pd->port_rcvegrbuf_phys[0]), 9209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan GFP_KERNEL); 9217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf_phys) { 9227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 9237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail_rcvegrbuf; 9247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) { 9267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf[e] = dma_alloc_coherent( 9287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->pcidev->dev, size, &pd->port_rcvegrbuf_phys[e], 9297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan gfp_flags); 9307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf[e]) { 9327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 9337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail_rcvegrbuf_phys; 9347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegr_phys = pd->port_rcvegrbuf_phys[0]; 9387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = chunk = 0; chunk < pd->port_rcvegrbuf_chunks; chunk++) { 9407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dma_addr_t pa = pd->port_rcvegrbuf_phys[chunk]; 9417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned i; 9427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; e < egrcnt && i < egrperchunk; e++, i++) { 9447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_f_put_tid(dd, e + egroff + 9457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (u64 __iomem *) 9467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((char __iomem *) 9477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_kregbase + 948f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger dd->ipath_rcvegrbase), 949f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger RCVHQ_RCV_TYPE_EAGER, pa); 9507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pa += egrsize; 9517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cond_resched(); /* don't hog the cpu */ 9537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 9567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 9577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail_rcvegrbuf_phys: 9597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = 0; e < pd->port_rcvegrbuf_chunks && 960f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan pd->port_rcvegrbuf[e]; e++) { 9617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dma_free_coherent(&dd->pcidev->dev, size, 9627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf[e], 9637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys[e]); 9647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 965f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 9669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(pd->port_rcvegrbuf_phys); 9677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys = NULL; 9687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail_rcvegrbuf: 9699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(pd->port_rcvegrbuf); 9707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf = NULL; 9717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 9727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 9737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 9747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 975f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 976f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan/* common code for the mappings on dma_alloc_coherent mem */ 977f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivanstatic int ipath_mmap_mem(struct vm_area_struct *vma, 9781fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan struct ipath_portdata *pd, unsigned len, int write_ok, 9791fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan void *kvaddr, char *what) 980f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan{ 981f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 9821fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan unsigned long pfn; 983f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan int ret; 984f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 985f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > len) { 986f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dev_info(&dd->pcidev->dev, 987f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "FAIL on %s: len %lx > %x\n", what, 988f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_end - vma->vm_start, len); 989f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = -EFAULT; 990f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan goto bail; 991f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 992f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 993f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (!write_ok) { 994f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (vma->vm_flags & VM_WRITE) { 995f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dev_info(&dd->pcidev->dev, 996f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "%s must be mapped readonly\n", what); 997f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = -EPERM; 998f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan goto bail; 999f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 1000f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 1001f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* don't allow them to later change with mprotect */ 1002f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYWRITE; 1003f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 1004f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 10051fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pfn = virt_to_phys(kvaddr) >> PAGE_SHIFT; 1006f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = remap_pfn_range(vma, vma->vm_start, pfn, 1007f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan len, vma->vm_page_prot); 1008f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (ret) 10091fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dev_info(&dd->pcidev->dev, "%s port%u mmap of %lx, %x " 10101fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan "bytes r%c failed: %d\n", what, pd->port_port, 10111fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pfn, len, write_ok?'w':'o', ret); 1012f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan else 10131fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan ipath_cdbg(VERBOSE, "%s port%u mmaped %lx, %x bytes " 10141fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan "r%c\n", what, pd->port_port, pfn, len, 10151fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan write_ok?'w':'o'); 1016f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivanbail: 1017f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan return ret; 1018f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan} 1019f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 10207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_ureg(struct vm_area_struct *vma, struct ipath_devdata *dd, 10217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 ureg) 10227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long phys; 10247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 10257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1026f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* 1027f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * This is real hardware, so use io_remap. This is the mechanism 1028f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * for the user process to update the head registers for their port 1029f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * in the chip. 1030f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan */ 10317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > PAGE_SIZE) { 10327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL mmap userreg: reqlen " 10337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%lx > PAGE\n", vma->vm_end - vma->vm_start); 10347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 10357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 10367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys = dd->ipath_physaddr + ureg; 10377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 10387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; 10407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = io_remap_pfn_range(vma, vma->vm_start, 10417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys >> PAGE_SHIFT, 10427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 10437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot); 10447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 10467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 10477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_piobufs(struct vm_area_struct *vma, 10497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd, 10509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd, 10519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned piobufs, unsigned piocnt) 10527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long phys; 10547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 10557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1057f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * When we map the PIO buffers in the chip, we want to map them as 1058f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * writeonly, no read possible. This prevents access to previous 1059f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * process data, and catches users who might try to read the i/o 1060f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * space due to a bug. 10617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 10629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > (piocnt * dd->ipath_palign)) { 10637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL mmap piobufs: " 10647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "reqlen %lx > PAGE\n", 10657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start); 10669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 10677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan phys = dd->ipath_physaddr + piobufs; 1071f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 1072eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan#if defined(__powerpc__) 1073eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan /* There isn't a generic way to specify writethrough mappings */ 1074eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; 1075eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) |= _PAGE_WRITETHRU; 1076eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) &= ~_PAGE_GUARDED; 1077eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan#endif 1078eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan 1079367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan /* 1080367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan * don't allow them to later change to readable with mprotect (for when 1081367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan * not initially mapped readable, as is normally the case) 1082367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan */ 1083f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYREAD; 10847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; 10857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = io_remap_pfn_range(vma, vma->vm_start, phys >> PAGE_SHIFT, 10877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 10887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot); 10897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 10907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 10917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 10927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_rcvegrbufs(struct vm_area_struct *vma, 10947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd) 10957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 10977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long start, size; 10987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t total_size, i; 10991fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan unsigned long pfn; 11007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 11017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size = pd->port_rcvegrbuf_size; 11037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan total_size = pd->port_rcvegrbuf_chunks * size; 11047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > total_size) { 11057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL on egr bufs: " 11067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "reqlen %lx > actual %lx\n", 11077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 11087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) total_size); 11099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 11107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 11117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 11127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (vma->vm_flags & VM_WRITE) { 11147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "Can't map eager buffers as " 11157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "writable (flags=%lx)\n", vma->vm_flags); 11167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EPERM; 11177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 11187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1119f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* don't allow them to later change to writeable with mprotect */ 1120f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYWRITE; 11217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan start = vma->vm_start; 11237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < pd->port_rcvegrbuf_chunks; i++, start += size) { 11251fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pfn = virt_to_phys(pd->port_rcvegrbuf[i]) >> PAGE_SHIFT; 11261fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan ret = remap_pfn_range(vma, start, pfn, size, 11271fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan vma->vm_page_prot); 11287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 11297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 11307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 11317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 11327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 11347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 11357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 11367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan/* 11383c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin * ipath_file_vma_fault - handle a VMA page fault. 11399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 11403c8450860ba9d6279dbc969633eacf99161860d9Nick Pigginstatic int ipath_file_vma_fault(struct vm_area_struct *vma, 11413c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin struct vm_fault *vmf) 11429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 11433c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin struct page *page; 11449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11453c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT)); 11469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!page) 11473c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin return VM_FAULT_SIGBUS; 11489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan get_page(page); 11493c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin vmf->page = page; 11503c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin 11513c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin return 0; 11529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 11539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic struct vm_operations_struct ipath_file_vm_ops = { 11553c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin .fault = ipath_file_vma_fault, 11569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan}; 11579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int mmap_kvaddr(struct vm_area_struct *vma, u64 pgaddr, 11599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd, unsigned subport) 11609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 11619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned long len; 11629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_devdata *dd; 11639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan void *addr; 11649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t size; 11650a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell int ret = 0; 11669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* If the port is not shared, all addresses should be physical */ 11680a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (!pd->port_subport_cnt) 11699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 11709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd = pd->port_dd; 11729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size; 11739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 1175c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * Each process has all the subport uregbase, rcvhdrq, and 1176c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * rcvegrbufs mmapped - as an array for all the processes, 1177c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * and also separately for this process. 11789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 1179c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage if (pgaddr == cvt_kvaddr(pd->subport_uregbase)) { 1180c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_uregbase; 1181c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size = PAGE_SIZE * pd->port_subport_cnt; 1182c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base)) { 1183c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_rcvhdr_base; 1184c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size = pd->port_rcvhdrq_size * pd->port_subport_cnt; 1185c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf)) { 1186c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_rcvegrbuf; 1187c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size *= pd->port_subport_cnt; 1188c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_uregbase + 1189c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage PAGE_SIZE * subport)) { 1190c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_uregbase + PAGE_SIZE * subport; 1191c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size = PAGE_SIZE; 1192c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base + 1193c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvhdrq_size * subport)) { 1194c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_rcvhdr_base + 1195c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvhdrq_size * subport; 1196c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size = pd->port_rcvhdrq_size; 1197c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf + 1198c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size * subport)) { 1199c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_rcvegrbuf + size * subport; 1200c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage /* rcvegrbufs are read-only on the slave */ 1201c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage if (vma->vm_flags & VM_WRITE) { 1202c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage dev_info(&dd->pcidev->dev, 1203c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage "Can't map eager buffers as " 1204c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage "writable (flags=%lx)\n", vma->vm_flags); 1205c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage ret = -EPERM; 1206c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage goto bail; 1207c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } 1208c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage /* 1209c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * Don't allow permission to later change to writeable 1210c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * with mprotect. 1211c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage */ 1212c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage vma->vm_flags &= ~VM_MAYWRITE; 1213c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else { 12149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 1215c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } 12169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan len = vma->vm_end - vma->vm_start; 12179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (len > size) { 12189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(MM, "FAIL: reqlen %lx > %zx\n", len, size); 12199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 12209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 12219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 12229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_pgoff = (unsigned long) addr >> PAGE_SHIFT; 12249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_ops = &ipath_file_vm_ops; 12259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_flags |= VM_RESERVED | VM_DONTEXPAND; 12260a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell ret = 1; 12279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 12299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 12309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 12319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 12337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_mmap - mmap various structures into user space 12347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @fp: the file pointer 12357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @vma: the VM area 12367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 12377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We use this to have a shared buffer between the kernel and the user code 12387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for the rcvhdr queue, egr buffers, and the per-port user regs and pio 12397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * buffers in the chip. We have the open and close entries so we can bump 12407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the ref count and keep the driver from being unloaded while still mapped. 12417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_mmap(struct file *fp, struct vm_area_struct *vma) 12437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 12447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 12457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 12467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pgaddr, ureg; 12479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned piobufs, piocnt; 12487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 12497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 12519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd) { 12529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 12539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 12549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 12557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 1256f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 12577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 12587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This is the ipath_do_user_init() code, mapping the shared buffers 12597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * into the user process. The address referred to by vm_pgoff is the 12609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * file offset passed via mmap(). For shared ports, this is the 12619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * kernel vmalloc() address of the pages to share with the master. 12629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * For non-shared or master ports, this is a physical address. 12639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * We only do one mmap for each space mapped. 12647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pgaddr = vma->vm_pgoff << PAGE_SHIFT; 12667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 12689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Check for 0 in case one of the allocations failed, but user 12699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * called mmap anyway. 12707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pgaddr) { 12729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 12739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 1274f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 12757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(MM, "pgaddr %llx vm_start=%lx len %lx port %u:%u:%u\n", 12777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pgaddr, vma->vm_start, 12789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_end - vma->vm_start, dd->ipath_unit, 12799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, subport_fp(fp)); 12807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 12829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Physical addresses must fit in 40 bits for our hardware. 12839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Check for kernel virtual addresses first, anything else must 12849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * match a HW or memory address. 12859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 12860a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell ret = mmap_kvaddr(vma, pgaddr, pd, subport_fp(fp)); 12870a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (ret) { 12880a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (ret > 0) 12890a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell ret = 0; 12909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 12919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 12929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1293a18e26ae442001de62f6b84a923e8613347dc35fRalph Campbell ureg = dd->ipath_uregbase + dd->ipath_ureg_align * pd->port_port; 12949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) { 12959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* port is not shared */ 1296e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson piocnt = pd->port_piocnt; 12979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piobufs = pd->port_piobufs; 12989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (!subport_fp(fp)) { 12999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* caller is the master */ 1300e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson piocnt = (pd->port_piocnt / pd->port_subport_cnt) + 1301e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson (pd->port_piocnt % pd->port_subport_cnt); 13029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piobufs = pd->port_piobufs + 1303e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson dd->ipath_palign * (pd->port_piocnt - piocnt); 13049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 13059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned slave = subport_fp(fp) - 1; 13069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 13079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* caller is a slave */ 1308e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson piocnt = pd->port_piocnt / pd->port_subport_cnt; 13099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piobufs = pd->port_piobufs + dd->ipath_palign * piocnt * slave; 1310f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 13119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 13129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (pgaddr == ureg) 13137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_ureg(vma, dd, ureg); 13149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == piobufs) 13159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = mmap_piobufs(vma, dd, pd, piobufs, piocnt); 13169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == dd->ipath_pioavailregs_phys) 13179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* in-memory copy of pioavail registers */ 13189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0, 13191fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan (void *) dd->ipath_pioavailregs_dma, 13209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "pioavail registers"); 13219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == pd->port_rcvegr_phys) 13227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_rcvegrbufs(vma, pd); 13239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == (u64) pd->port_rcvhdrq_phys) 1324f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* 1325525d0ca1d452ed336c1d907fb20c104467a8a47bBryan O'Sullivan * The rcvhdrq itself; readonly except on HT (so have 1326f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * to allow writable mapping), multiple pages, contiguous 1327f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * from an i/o perspective. 1328f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan */ 13299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, pd->port_rcvhdrq_size, 1, 13301fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pd->port_rcvhdrq, 1331f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "rcvhdrq"); 13329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == (u64) pd->port_rcvhdrqtailaddr_phys) 1333f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* in-memory copy of rcvhdrq tail register */ 1334f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0, 13351fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pd->port_rcvhdrtail_kvaddr, 1336f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "rcvhdrq tail"); 13377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else 13387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 13397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_private_data = NULL; 13417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 13437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 13449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "Failure %d on off %llx len %lx\n", 13459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan -ret, (unsigned long long)pgaddr, 13469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_end - vma->vm_start); 13479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 13487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 13497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 13507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 135170c51da2c4f84317bb13a2b564600afdcebd686fArthur Jonesstatic unsigned ipath_poll_hdrqfull(struct ipath_portdata *pd) 135270c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones{ 135370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones unsigned pollflag = 0; 135470c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 135570c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones if ((pd->poll_type & IPATH_POLL_TYPE_OVERFLOW) && 135670c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_hdrqfull != pd->port_hdrqfull_poll) { 135770c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pollflag |= POLLIN | POLLRDNORM; 135870c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_hdrqfull_poll = pd->port_hdrqfull; 135970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones } 136070c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 136170c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones return pollflag; 136270c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones} 136370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 1364f2d042313e420002b06715675963cfab48ed2597Robert Walshstatic unsigned int ipath_poll_urgent(struct ipath_portdata *pd, 1365f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct file *fp, 1366f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct poll_table_struct *pt) 13677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 1368e35d710d0c5b74bc9833d6a3791706bd577a3724Bryan O'Sullivan unsigned pollflag = 0; 13697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 13707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 13727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 137370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* variable access in ipath_poll_hdrqfull() needs this */ 137470c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones rmb(); 137570c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pollflag = ipath_poll_hdrqfull(pd); 13767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 137770c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones if (pd->port_urgent != pd->port_urgent_poll) { 1378f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag |= POLLIN | POLLRDNORM; 137970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_urgent_poll = pd->port_urgent; 1380f2d042313e420002b06715675963cfab48ed2597Robert Walsh } 13817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1382f2d042313e420002b06715675963cfab48ed2597Robert Walsh if (!pollflag) { 138370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* this saves a spin_lock/unlock in interrupt handler... */ 1384f2d042313e420002b06715675963cfab48ed2597Robert Walsh set_bit(IPATH_PORT_WAITING_URG, &pd->port_flag); 138570c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* flush waiting flag so don't miss an event... */ 138670c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones wmb(); 1387f2d042313e420002b06715675963cfab48ed2597Robert Walsh poll_wait(fp, &pd->port_wait, pt); 1388f2d042313e420002b06715675963cfab48ed2597Robert Walsh } 1389f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1390f2d042313e420002b06715675963cfab48ed2597Robert Walsh return pollflag; 1391f2d042313e420002b06715675963cfab48ed2597Robert Walsh} 1392f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1393f2d042313e420002b06715675963cfab48ed2597Robert Walshstatic unsigned int ipath_poll_next(struct ipath_portdata *pd, 1394f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct file *fp, 1395f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct poll_table_struct *pt) 1396f2d042313e420002b06715675963cfab48ed2597Robert Walsh{ 139770c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones u32 head; 139870c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones u32 tail; 1399f2d042313e420002b06715675963cfab48ed2597Robert Walsh unsigned pollflag = 0; 1400f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct ipath_devdata *dd; 1401f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1402f2d042313e420002b06715675963cfab48ed2597Robert Walsh dd = pd->port_dd; 14037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 140470c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* variable access in ipath_poll_hdrqfull() needs this */ 140570c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones rmb(); 140670c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pollflag = ipath_poll_hdrqfull(pd); 140770c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 14087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan head = ipath_read_ureg32(dd, ur_rcvhdrhead, pd->port_port); 1409c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell if (pd->port_rcvhdrtail_kvaddr) 1410c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell tail = ipath_get_rcvhdrtail(pd); 1411c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell else 1412c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell tail = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); 1413f2d042313e420002b06715675963cfab48ed2597Robert Walsh 141470c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones if (head != tail) 1415f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag |= POLLIN | POLLRDNORM; 141670c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones else { 141770c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* this saves a spin_lock/unlock in interrupt handler */ 14187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan set_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag); 141970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* flush waiting flag so we don't miss an event */ 142070c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones wmb(); 1421f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1422d8274869d742c3d8082e1428de47e54d12104928Dave Olson set_bit(pd->port_port + dd->ipath_r_intravail_shift, 1423f2d042313e420002b06715675963cfab48ed2597Robert Walsh &dd->ipath_rcvctrl); 1424f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1425f2d042313e420002b06715675963cfab48ed2597Robert Walsh ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 1426f2d042313e420002b06715675963cfab48ed2597Robert Walsh dd->ipath_rcvctrl); 1427f2d042313e420002b06715675963cfab48ed2597Robert Walsh 14289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (dd->ipath_rhdrhead_intr_off) /* arm rcv interrupt */ 1429f2d042313e420002b06715675963cfab48ed2597Robert Walsh ipath_write_ureg(dd, ur_rcvhdrhead, 1430f2d042313e420002b06715675963cfab48ed2597Robert Walsh dd->ipath_rhdrhead_intr_off | head, 1431f2d042313e420002b06715675963cfab48ed2597Robert Walsh pd->port_port); 14327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1433f2d042313e420002b06715675963cfab48ed2597Robert Walsh poll_wait(fp, &pd->port_wait, pt); 14347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 14357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1436f2d042313e420002b06715675963cfab48ed2597Robert Walsh return pollflag; 1437f2d042313e420002b06715675963cfab48ed2597Robert Walsh} 1438f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1439f2d042313e420002b06715675963cfab48ed2597Robert Walshstatic unsigned int ipath_poll(struct file *fp, 1440f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct poll_table_struct *pt) 1441f2d042313e420002b06715675963cfab48ed2597Robert Walsh{ 1442f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct ipath_portdata *pd; 1443f2d042313e420002b06715675963cfab48ed2597Robert Walsh unsigned pollflag; 1444f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1445f2d042313e420002b06715675963cfab48ed2597Robert Walsh pd = port_fp(fp); 1446f2d042313e420002b06715675963cfab48ed2597Robert Walsh if (!pd) 1447f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag = 0; 1448f2d042313e420002b06715675963cfab48ed2597Robert Walsh else if (pd->poll_type & IPATH_POLL_TYPE_URGENT) 1449f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag = ipath_poll_urgent(pd, fp, pt); 1450f2d042313e420002b06715675963cfab48ed2597Robert Walsh else 1451f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag = ipath_poll_next(pd, fp, pt); 14527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1453e35d710d0c5b74bc9833d6a3791706bd577a3724Bryan O'Sullivan return pollflag; 14547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 14557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14560df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbagestatic int ipath_supports_subports(int user_swmajor, int user_swminor) 14570df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage{ 14580df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* no subport implementation prior to software version 1.3 */ 14590df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return (user_swmajor > 1) || (user_swminor >= 3); 14600df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage} 14610df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage 14620df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbagestatic int ipath_compatible_subports(int user_swmajor, int user_swminor) 14630df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage{ 14640df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* this code is written long-hand for clarity */ 14650df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (IPATH_USER_SWMAJOR != user_swmajor) { 14660df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* no promise of compatibility if major mismatch */ 14670df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return 0; 14680df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage } 14690df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (IPATH_USER_SWMAJOR == 1) { 14700df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage switch (IPATH_USER_SWMINOR) { 14710df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage case 0: 14720df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage case 1: 14730df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage case 2: 14740df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* no subport implementation so cannot be compatible */ 14750df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return 0; 14760df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage case 3: 14770df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* 3 is only compatible with itself */ 14780df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return user_swminor == 3; 14790df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage default: 14800df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* >= 4 are compatible (or are expected to be) */ 14810df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return user_swminor >= 4; 14820df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage } 14830df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage } 14840df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* make no promises yet for future major versions */ 14850df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return 0; 14860df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage} 14870df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage 14889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int init_subports(struct ipath_devdata *dd, 14899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd, 14909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 14919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 14929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret = 0; 1493c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage unsigned num_subports; 14949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t size; 14959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 14969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 1497bacf4013530e7fc230a8aa0c6ea3c17fc2f47665Mark Debbage * If the user is requesting zero subports, 14989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * skip the subport allocation. 14999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 1500bacf4013530e7fc230a8aa0c6ea3c17fc2f47665Mark Debbage if (uinfo->spu_subport_cnt <= 0) 15019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 1502c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage 15030df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* Self-consistency check for ipath_compatible_subports() */ 15040df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (ipath_supports_subports(IPATH_USER_SWMAJOR, IPATH_USER_SWMINOR) && 15050df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage !ipath_compatible_subports(IPATH_USER_SWMAJOR, 15060df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage IPATH_USER_SWMINOR)) { 1507c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage dev_info(&dd->pcidev->dev, 15080df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage "Inconsistent ipath_compatible_subports()\n"); 15090df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage goto bail; 15100df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage } 15110df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage 15120df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* Check for subport compatibility */ 15130df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (!ipath_compatible_subports(uinfo->spu_userversion >> 16, 15140df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage uinfo->spu_userversion & 0xffff)) { 15150df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage dev_info(&dd->pcidev->dev, 15160df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage "Mismatched user version (%d.%d) and driver " 15170df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage "version (%d.%d) while port sharing. Ensure " 1518c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage "that driver and library are from the same " 1519c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage "release.\n", 15200df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage (int) (uinfo->spu_userversion >> 16), 1521c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage (int) (uinfo->spu_userversion & 0xffff), 15220df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage IPATH_USER_SWMAJOR, 1523c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage IPATH_USER_SWMINOR); 1524c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage goto bail; 1525c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } 15260a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (uinfo->spu_subport_cnt > INFINIPATH_MAX_SUBPORT) { 15279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 15289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 15299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 15309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1531c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage num_subports = uinfo->spu_subport_cnt; 1532c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->subport_uregbase = vmalloc(PAGE_SIZE * num_subports); 15339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->subport_uregbase) { 15349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENOMEM; 15359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 15369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 15379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Note: pd->port_rcvhdrq_size isn't initialized yet. */ 15389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize * 1539c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage sizeof(u32), PAGE_SIZE) * num_subports; 15409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->subport_rcvhdr_base = vmalloc(size); 15419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->subport_rcvhdr_base) { 15429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENOMEM; 15439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail_ureg; 15449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 15459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 15469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->subport_rcvegrbuf = vmalloc(pd->port_rcvegrbuf_chunks * 15479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf_size * 1548c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage num_subports); 15499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->subport_rcvegrbuf) { 15509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENOMEM; 15519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail_rhdr; 15529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 15539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 15549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_subport_cnt = uinfo->spu_subport_cnt; 15559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_subport_id = uinfo->spu_subport_id; 15569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->active_slaves = 1; 1557947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell set_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag); 1558c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage memset(pd->subport_uregbase, 0, PAGE_SIZE * num_subports); 1559c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage memset(pd->subport_rcvhdr_base, 0, size); 1560c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage memset(pd->subport_rcvegrbuf, 0, pd->port_rcvegrbuf_chunks * 1561c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvegrbuf_size * 1562c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage num_subports); 15639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 15649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 15659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail_rhdr: 15669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vfree(pd->subport_rcvhdr_base); 15679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail_ureg: 15689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vfree(pd->subport_uregbase); 15699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->subport_uregbase = NULL; 15709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 15719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 15729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 15739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 15747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int try_alloc_port(struct ipath_devdata *dd, int port, 15759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct file *fp, 15769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 15777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 15789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd; 15797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 15807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!(pd = dd->ipath_pd[port])) { 15829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan void *ptmp; 15837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd = kzalloc(sizeof(struct ipath_portdata), GFP_KERNEL); 15857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 15877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Allocate memory for use in ipath_tid_update() just once 15887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * at open, not per call. Reduces cost of expected send 15897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * setup. 15907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 15917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ptmp = kmalloc(dd->ipath_rcvtidcnt * sizeof(u16) + 15927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidcnt * sizeof(struct page **), 15937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan GFP_KERNEL); 15949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd || !ptmp) { 15957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Unable to allocate portdata " 15967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "memory, failing open\n"); 15977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 15989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(pd); 15997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kfree(ptmp); 16007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_pd[port] = pd; 16037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_port = port; 16047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_dd = dd; 16057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_tid_pg_list = ptmp; 16067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan init_waitqueue_head(&dd->ipath_pd[port]->port_wait); 16077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_cnt) { 16099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->userversion = uinfo->spu_userversion; 16109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan init_user_egr_sizes(pd); 16119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if ((ret = init_subports(dd, pd, uinfo)) != 0) 16129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 16137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] opened unit:port %u:%u\n", 16147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, dd->ipath_unit, 16157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan port); 16169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_cnt = 1; 16179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan port_fp(fp) = pd; 161840d97692fbfe52ef68fa771d8121394b2210fd67Pavel Emelyanov pd->port_pid = get_pid(task_pid(current)); 16199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan strncpy(pd->port_comm, current->comm, sizeof(pd->port_comm)); 16207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_ports++; 16217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 16229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else 16239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EBUSY; 16247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 16267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 16277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 16287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic inline int usable(struct ipath_devdata *dd) 16307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 16317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return dd && 16327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (dd->ipath_flags & IPATH_PRESENT) && 16337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_kregbase && 16347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_lid && 16357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan !(dd->ipath_flags & (IPATH_LINKDOWN | IPATH_DISABLED 16367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan | IPATH_LINKUNK)); 16377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 16387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int find_free_port(int unit, struct file *fp, 16409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 16417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 16427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(unit); 16437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret, i; 16447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd) { 16467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENODEV; 16477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!usable(dd)) { 16517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENETDOWN; 16527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan for (i = 1; i < dd->ipath_cfgports; i++) { 16569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = try_alloc_port(dd, i, fp, uinfo); 16577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret != -EBUSY) 16587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 16617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 16637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 16647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 16657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int find_best_unit(struct file *fp, 16679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 16687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 16697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0, i, prefunit = -1, devmax; 16707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int maxofallports, npresent, nup; 16717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ndev; 16727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan devmax = ipath_count_units(&npresent, &nup, &maxofallports); 16747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 16767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This code is present to allow a knowledgeable person to 16777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * specify the layout of processes to processors before opening 16787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * this driver, and then we'll assign the process to the "closest" 1679525d0ca1d452ed336c1d907fb20c104467a8a47bBryan O'Sullivan * InfiniPath chip to that processor (we assume reasonable connectivity, 16807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for now). This code assumes that if affinity has been set 16817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * before this point, that at most one cpu is set; for now this 16827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * is reasonable. I check for both cpus_empty() and cpus_full(), 16837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in case some kernel variant sets none of the bits when no 16847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * affinity is set. 2.6.11 and 12 kernels have all present 16857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * cpus set. Some day we'll have to fix it up further to handle 1686525d0ca1d452ed336c1d907fb20c104467a8a47bBryan O'Sullivan * a cpu subset. This algorithm fails for two HT chips connected 16877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in tunnel fashion. Eventually this needs real topology 16887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * information. There may be some issues with dual core numbering 16897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * as well. This needs more work prior to release. 16907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 16917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cpus_empty(current->cpus_allowed) && 16927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan !cpus_full(current->cpus_allowed)) { 1693f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan int ncpus = num_online_cpus(), curcpu = -1, nset = 0; 16947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ncpus; i++) 16957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cpu_isset(i, current->cpus_allowed)) { 16967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] affinity set for " 1697f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan "cpu %d/%d\n", current->comm, 1698f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan current->pid, i, ncpus); 16997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan curcpu = i; 1700f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan nset++; 17017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1702f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan if (curcpu != -1 && nset != ncpus) { 17037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (npresent) { 17047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit = curcpu / (ncpus / npresent); 1705c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage ipath_cdbg(PROC,"%s[%u] %d chips, %d cpus, " 17067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%d cpus/chip, select unit %d\n", 17077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, 17087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan npresent, ncpus, ncpus / npresent, 17097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit); 17107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 17157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * user ports start at 1, kernel port is 0 17167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * For now, we do round-robin access across all chips 17177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 17187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (prefunit != -1) 17207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan devmax = prefunit + 1; 17217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanrecheck: 17227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 1; i < maxofallports; i++) { 17237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (ndev = prefunit != -1 ? prefunit : 0; ndev < devmax; 17247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ndev++) { 17257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(ndev); 17267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!usable(dd)) 17287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; /* can't use this unit */ 17297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (i >= dd->ipath_cfgports) 17307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 17317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Maxed out on users of this unit. Try 17327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * next. 17337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 17347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 17359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = try_alloc_port(dd, i, fp, uinfo); 17367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!ret) 17377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 17387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (npresent) { 17427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (nup == 0) { 17437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENETDOWN; 17447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No ports available (none initialized " 17457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "and ready)\n"); 17467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 17477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (prefunit > 0) { 17487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* if started above 0, retry from 0 */ 17497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, 17507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%s[%u] no ports on prefunit " 17517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%d, clear and re-check\n", 17527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, 17537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit); 17547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan devmax = ipath_count_units(NULL, NULL, 17557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan NULL); 17567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit = -1; 17577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto recheck; 17587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 17607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No ports available\n"); 17617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 17637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENXIO; 17647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No boards found\n"); 17657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 17687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 17697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 17707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int find_shared_port(struct file *fp, 17729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 17739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 17749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int devmax, ndev, i; 17759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret = 0; 17769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan devmax = ipath_count_units(NULL, NULL, NULL); 17789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan for (ndev = 0; ndev < devmax; ndev++) { 17809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(ndev); 17819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17825d1ce03dd335abaef50dc615137cac2a22c5cee0Dave Olson if (!usable(dd)) 17839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan continue; 17849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan for (i = 1; i < dd->ipath_cfgports; i++) { 17859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd = dd->ipath_pd[i]; 17869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Skip ports which are not yet open */ 17889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd || !pd->port_cnt) 17899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan continue; 17909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Skip port if it doesn't match the requested one */ 17919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (pd->port_subport_id != uinfo->spu_subport_id) 17929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan continue; 17939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Verify the sharing process matches the master */ 17949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (pd->port_subport_cnt != uinfo->spu_subport_cnt || 17959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->userversion != uinfo->spu_userversion || 17969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_cnt >= pd->port_subport_cnt) { 17979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 17989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 17999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan port_fp(fp) = pd; 18019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_fp(fp) = pd->port_cnt++; 180240d97692fbfe52ef68fa771d8121394b2210fd67Pavel Emelyanov pd->port_subpid[subport_fp(fp)] = 180340d97692fbfe52ef68fa771d8121394b2210fd67Pavel Emelyanov get_pid(task_pid(current)); 18049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcursor_fp(fp) = 0; 18059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->active_slaves |= 1 << subport_fp(fp); 18069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(PROC, 18079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "%s[%u] %u sharing %s[%u] unit:port %u:%u\n", 18089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan current->comm, current->pid, 18099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_fp(fp), 181040d97692fbfe52ef68fa771d8121394b2210fd67Pavel Emelyanov pd->port_comm, pid_nr(pd->port_pid), 18119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_unit, pd->port_port); 18129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = 1; 18139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 18149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivandone: 18189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 18199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 18209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_open(struct inode *in, struct file *fp) 18227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 1823c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan /* The real work is performed later in ipath_assign_port() */ 1824f2b9857eee17797541b845782ade4d7a9d50f843Jonathan Corbet cycle_kernel_lock(); 18259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan fp->private_data = kzalloc(sizeof(struct ipath_filedata), GFP_KERNEL); 18269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return fp->private_data ? 0 : -ENOMEM; 18279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 18289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1829c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan/* Get port early, so can set affinity prior to memory allocation */ 1830c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivanstatic int ipath_assign_port(struct file *fp, 18319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 18329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 18339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret; 18349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int i_minor; 18350df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage unsigned swmajor, swminor; 18369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Check to be sure we haven't already initialized this file */ 18389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (port_fp(fp)) { 18399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 18409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 18419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* for now, if major version is different, bail */ 18440df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage swmajor = uinfo->spu_userversion >> 16; 18450df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (swmajor != IPATH_USER_SWMAJOR) { 18469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_dbg("User major version %d not same as driver " 18479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "major %d\n", uinfo->spu_userversion >> 16, 18489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan IPATH_USER_SWMAJOR); 18499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENODEV; 18509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 18519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan swminor = uinfo->spu_userversion & 0xffff; 18549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (swminor != IPATH_USER_SWMINOR) 18559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_dbg("User minor version %d not same as driver " 18569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "minor %d\n", swminor, IPATH_USER_SWMINOR); 18577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_lock(&ipath_mutex); 18597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18600df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (ipath_compatible_subports(swmajor, swminor) && 18610df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage uinfo->spu_subport_cnt && 18629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (ret = find_shared_port(fp, uinfo))) { 18639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret > 0) 18649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = 0; 1865124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson goto done_chk_sdma; 18669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18681cfd6e648b5ea21b0d48bf6f18b129e4576557d5Josef Sipek i_minor = iminor(fp->f_path.dentry->d_inode) - IPATH_USER_MINOR_BASE; 18697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "open on dev %lx (minor %d)\n", 18701cfd6e648b5ea21b0d48bf6f18b129e4576557d5Josef Sipek (long)fp->f_path.dentry->d_inode->i_rdev, i_minor); 18717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (i_minor) 18739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = find_free_port(i_minor - 1, fp, uinfo); 18747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else 18759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = find_best_unit(fp, uinfo); 18767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1877124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olsondone_chk_sdma: 1878124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (!ret) { 1879124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct ipath_filedata *fd = fp->private_data; 1880124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson const struct ipath_portdata *pd = fd->pd; 1881124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson const struct ipath_devdata *dd = pd->port_dd; 1882124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 1883124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson fd->pq = ipath_user_sdma_queue_create(&dd->pcidev->dev, 1884124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson dd->ipath_unit, 1885124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson pd->port_port, 1886124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson fd->subport); 1887124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 1888124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (!fd->pq) 1889124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson ret = -ENOMEM; 1890124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson } 1891124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 18927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_unlock(&ipath_mutex); 18939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1894c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivandone: 1895c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan return ret; 1896c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan} 1897c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan 1898c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan 1899c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivanstatic int ipath_do_user_init(struct file *fp, 1900c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan const struct ipath_user_info *uinfo) 1901c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan{ 1902c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan int ret; 1903947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell struct ipath_portdata *pd = port_fp(fp); 1904c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan struct ipath_devdata *dd; 1905c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan u32 head32; 19069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1907947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell /* Subports don't need to initialize anything since master did it. */ 1908947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell if (subport_fp(fp)) { 1909947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell ret = wait_event_interruptible(pd->port_wait, 1910947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell !test_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag)); 1911947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell goto done; 1912947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell } 1913947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell 19149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd = pd->port_dd; 19159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 19169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (uinfo->spu_rcvhdrsize) { 19179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_setrcvhdrsize(dd, uinfo->spu_rcvhdrsize); 19189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret) 19199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 19209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 19219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 19229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* for now we do nothing with rcvhdrcnt: uinfo->spu_rcvhdrcnt */ 19239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1924e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson /* some ports may get extra buffers, calculate that here */ 1925e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson if (pd->port_port <= dd->ipath_ports_extrabuf) 1926e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson pd->port_piocnt = dd->ipath_pbufsport + 1; 1927e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson else 1928e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson pd->port_piocnt = dd->ipath_pbufsport; 1929e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson 19309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* for right now, kernel piobufs are at end, so port 1 is at 0 */ 1931e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson if (pd->port_port <= dd->ipath_ports_extrabuf) 1932e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson pd->port_pio_base = (dd->ipath_pbufsport + 1) 1933e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson * (pd->port_port - 1); 1934e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson else 1935e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson pd->port_pio_base = dd->ipath_ports_extrabuf + 1936e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson dd->ipath_pbufsport * (pd->port_port - 1); 19379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_piobufs = dd->ipath_piobufbase + 1938e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson pd->port_pio_base * dd->ipath_palign; 1939e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson ipath_cdbg(VERBOSE, "piobuf base for port %u is 0x%x, piocnt %u," 1940e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson " first pio %u\n", pd->port_port, pd->port_piobufs, 1941e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson pd->port_piocnt, pd->port_pio_base); 1942e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson ipath_chg_pioavailkernel(dd, pd->port_pio_base, pd->port_piocnt, 0); 19439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 19449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 19459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Now allocate the rcvhdr Q and eager TIDs; skip the TID 19469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * array for time being. If pd->port_port > chip-supported, 19479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * we need to do extra stuff here to handle by handling overflow 19489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * through port 0, someday 19499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 19509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_create_rcvhdrq(dd, pd); 19519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!ret) 19529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_create_user_egr(pd); 19539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret) 19549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 19559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 19569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 19579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * set the eager head register for this port to the current values 19589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * of the tail pointers, since we don't know if they were 19599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * updated on last use of the port. 19609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 19619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan head32 = ipath_read_ureg32(dd, ur_rcvegrindextail, pd->port_port); 19629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_write_ureg(dd, ur_rcvegrindexhead, head32, pd->port_port); 1963755807a296f77ca7c31dc000afdfe1e5172bbf72Dave Olson pd->port_lastrcvhdrqtail = -1; 19649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(VERBOSE, "Wrote port%d egrhead %x from tail regs\n", 19659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, head32); 19669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_tidcursor = 0; /* start at beginning after open */ 196770c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 196870c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* initialize poll variables... */ 196970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_urgent = 0; 197070c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_urgent_poll = 0; 197170c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_hdrqfull_poll = pd->port_hdrqfull; 197270c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 19739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 19749355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * Now enable the port for receive. 19759355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * For chips that are set to DMA the tail register to memory 19769355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * when they change (and when the update bit transitions from 19779355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * 0 to 1. So for those chips, we turn it off and then back on. 19789355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * This will (very briefly) affect any other open ports, but the 19799355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * duration is very short, and therefore isn't an issue. We 19809355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * explictly set the in-memory tail copy to 0 beforehand, so we 19819355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * don't have to wait to be sure the DMA update has happened 19829355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * (chip resets head/tail to 0 on transition to enable). 19839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 1984d8274869d742c3d8082e1428de47e54d12104928Dave Olson set_bit(dd->ipath_r_portenable_shift + pd->port_port, 19859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan &dd->ipath_rcvctrl); 19869355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell if (!(dd->ipath_flags & IPATH_NODMA_RTAIL)) { 19879355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell if (pd->port_rcvhdrtail_kvaddr) 19889355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell ipath_clear_rcvhdrtail(pd); 19899355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 1990d8274869d742c3d8082e1428de47e54d12104928Dave Olson dd->ipath_rcvctrl & 1991d8274869d742c3d8082e1428de47e54d12104928Dave Olson ~(1ULL << dd->ipath_r_tailupd_shift)); 19929355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell } 19939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 19949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_rcvctrl); 1995947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell /* Notify any waiting slaves */ 1996947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell if (pd->port_subport_cnt) { 1997947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell clear_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag); 1998947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell wake_up(&pd->port_wait); 1999947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell } 20009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivandone: 20017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 20027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 20037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 20057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * unlock_exptid - unlock any expected TID entries port still had in use 20067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: port 20077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 20087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We don't actually update the chip here, because we do a bulk update 20097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * below, using ipath_f_clear_tids. 20107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 20117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void unlock_expected_tids(struct ipath_portdata *pd) 20127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 20137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 20147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int port_tidbase = pd->port_port * dd->ipath_rcvtidcnt; 20157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, cnt = 0, maxtid = port_tidbase + dd->ipath_rcvtidcnt; 20167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port %u unlocking any locked expTID pages\n", 20187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port); 20197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = port_tidbase; i < maxtid; i++) { 20209355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell struct page *ps = dd->ipath_pageshadow[i]; 20219355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell 20229355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell if (!ps) 20237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 20247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20259355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell dd->ipath_pageshadow[i] = NULL; 20261fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pci_unmap_page(dd->pcidev, dd->ipath_physshadow[i], 20271fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PAGE_SIZE, PCI_DMA_FROMDEVICE); 20289355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell ipath_release_user_pages_on_close(&ps, 1); 20297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt++; 20307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 20317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 20327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cnt) 20337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port %u locked %u expTID entries\n", 20347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, cnt); 20357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ipath_stats.sps_pagelocks || ipath_stats.sps_pageunlocks) 20377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "%llu pages locked, %llu unlocked\n", 20387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) ipath_stats.sps_pagelocks, 20397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) 20407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks); 20417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 20427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_close(struct inode *in, struct file *fp) 20447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 20457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 20469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_filedata *fd; 20477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 20487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 20493d0890985ac4dff781b7feba19fedda547314749Dave Olson unsigned long flags; 20507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned port; 20513d0890985ac4dff781b7feba19fedda547314749Dave Olson struct pid *pid; 20527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "close on dev %lx, private data %p\n", 20547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (long)in->i_rdev, fp->private_data); 20557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_lock(&ipath_mutex); 20577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan fd = (struct ipath_filedata *) fp->private_data; 20597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan fp->private_data = NULL; 20609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd = fd->pd; 20619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd) { 20629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan mutex_unlock(&ipath_mutex); 20639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 20649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 2065124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2066124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson dd = pd->port_dd; 2067124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2068124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson /* drain user sdma queue */ 2069124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson ipath_user_sdma_queue_drain(dd, fd->pq); 2070124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson ipath_user_sdma_queue_destroy(fd->pq); 2071124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 20729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (--pd->port_cnt) { 20739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 20749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * XXX If the master closes the port before the slave(s), 20759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * revoke the mmap for the eager receive queue so 20769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * the slave(s) don't wait for receive data forever. 20779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 20789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->active_slaves &= ~(1 << fd->subport); 207940d97692fbfe52ef68fa771d8121394b2210fd67Pavel Emelyanov put_pid(pd->port_subpid[fd->subport]); 208040d97692fbfe52ef68fa771d8121394b2210fd67Pavel Emelyanov pd->port_subpid[fd->subport] = NULL; 20819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan mutex_unlock(&ipath_mutex); 20829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 20839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 20843d0890985ac4dff781b7feba19fedda547314749Dave Olson /* early; no interrupt users after this */ 20853d0890985ac4dff781b7feba19fedda547314749Dave Olson spin_lock_irqsave(&dd->ipath_uctxt_lock, flags); 20869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan port = pd->port_port; 20873d0890985ac4dff781b7feba19fedda547314749Dave Olson dd->ipath_pd[port] = NULL; 20883d0890985ac4dff781b7feba19fedda547314749Dave Olson pid = pd->port_pid; 20893d0890985ac4dff781b7feba19fedda547314749Dave Olson pd->port_pid = NULL; 20903d0890985ac4dff781b7feba19fedda547314749Dave Olson spin_unlock_irqrestore(&dd->ipath_uctxt_lock, flags); 20917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_rcvwait_to || pd->port_piowait_to 20937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan || pd->port_rcvnowait || pd->port_pionowait) { 20947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "port%u, %u rcv, %u pio wait timeo; " 20957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%u rcv %u, pio already\n", 20967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, pd->port_rcvwait_to, 20977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_piowait_to, pd->port_rcvnowait, 20987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pionowait); 20997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvwait_to = pd->port_piowait_to = 21007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvnowait = pd->port_pionowait = 0; 21017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_flag) { 2103bb9171448deb1f7ece27674e2e431e4f267fd453Arthur Jones ipath_cdbg(PROC, "port %u port_flag set: 0x%lx\n", 21047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, pd->port_flag); 21057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_flag = 0; 21067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_kregbase) { 210970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* atomically clear receive enable port and intr avail. */ 2110d8274869d742c3d8082e1428de47e54d12104928Dave Olson clear_bit(dd->ipath_r_portenable_shift + port, 211135783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan &dd->ipath_rcvctrl); 2112d8274869d742c3d8082e1428de47e54d12104928Dave Olson clear_bit(pd->port_port + dd->ipath_r_intravail_shift, 211370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones &dd->ipath_rcvctrl); 211435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg( dd, dd->ipath_kregs->kr_rcvctrl, 211535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_rcvctrl); 211635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan /* and read back from chip to be sure that nothing 211735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * else is in flight when we do the rest */ 211835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan (void)ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); 21197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* clean up the pkeys for this port user */ 21217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_clean_part_key(pd, dd); 212235783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan /* 212335783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * be paranoid, and never write 0's to these, just use an 212435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * unused part of the port 0 tail page. Of course, 212535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * rcvhdraddr points to a large chunk of memory, so this 212635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * could still trash things, but at least it won't trash 212735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * page 0, and by disabling the port, it should stop "soon", 212835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * even if a packet or two is in already in flight after we 212935783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * disabled the port. 213035783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan */ 213135783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg_port(dd, 213235783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_kregs->kr_rcvhdrtailaddr, port, 213335783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_dummy_hdrq_phys); 213435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdraddr, 213535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan pd->port_port, dd->ipath_dummy_hdrq_phys); 213635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan 2137e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson ipath_disarm_piobufs(dd, pd->port_pio_base, pd->port_piocnt); 2138e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson ipath_chg_pioavailkernel(dd, pd->port_pio_base, 2139e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson pd->port_piocnt, 1); 214035783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan 21411fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_f_clear_tids(dd, pd->port_port); 21421fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan 214335783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan if (dd->ipath_pageshadow) 214435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan unlock_expected_tids(pd); 214535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_stats.sps_ports--; 214635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] closed port %u:%u\n", 21473d0890985ac4dff781b7feba19fedda547314749Dave Olson pd->port_comm, pid_nr(pid), 214835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_unit, port); 21497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21513d0890985ac4dff781b7feba19fedda547314749Dave Olson put_pid(pid); 21527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_unlock(&ipath_mutex); 2153f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ipath_free_pddata(dd, pd); /* after releasing the mutex */ 21547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 21569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(fd); 21577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 21587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 21597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_port_info(struct ipath_portdata *pd, u16 subport, 21617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_port_info __user *uinfo) 21627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 21637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_port_info info; 21647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int nup; 21657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 21669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t sz; 21677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void) ipath_count_units(NULL, &nup, NULL); 21697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.num_active = nup; 21707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.unit = pd->port_dd->ipath_unit; 21717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.port = pd->port_port; 21729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan info.subport = subport; 21739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Don't return new fields if old library opened the port. */ 21740df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (ipath_supports_subports(pd->userversion >> 16, 21750df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage pd->userversion & 0xffff)) { 21769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Number of user ports available for this device. */ 21779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan info.num_ports = pd->port_dd->ipath_cfgports - 1; 21789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan info.num_subports = pd->port_subport_cnt; 21799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan sz = sizeof(info); 21809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else 21819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan sz = sizeof(info) - 2 * sizeof(u16); 21827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (copy_to_user(uinfo, &info, sz)) { 21847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 21857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 21867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 21887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 21907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 21917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 21927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_get_slave_info(struct ipath_portdata *pd, 21949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan void __user *slave_mask_addr) 21959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 21969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret = 0; 21979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 21989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (copy_to_user(slave_mask_addr, &pd->active_slaves, sizeof(u32))) 21999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EFAULT; 22009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 22019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 22029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 2203124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olsonstatic int ipath_sdma_get_inflight(struct ipath_user_sdma_queue *pq, 2204124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson u32 __user *inflightp) 2205124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson{ 2206124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson const u32 val = ipath_user_sdma_inflight_counter(pq); 2207124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2208124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (put_user(val, inflightp)) 2209124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return -EFAULT; 2210124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2211124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return 0; 2212124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson} 2213124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2214124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olsonstatic int ipath_sdma_get_complete(struct ipath_devdata *dd, 2215124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct ipath_user_sdma_queue *pq, 2216124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson u32 __user *completep) 2217124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson{ 2218124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson u32 val; 2219124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson int err; 2220124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2221124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson err = ipath_user_sdma_make_progress(dd, pq); 2222124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (err < 0) 2223124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return err; 2224124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2225124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson val = ipath_user_sdma_complete_counter(pq); 2226124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (put_user(val, completep)) 2227124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return -EFAULT; 2228124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2229124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return 0; 2230124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson} 2231124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 22327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic ssize_t ipath_write(struct file *fp, const char __user *data, 22337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t count, loff_t *off) 22347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 22357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_cmd __user *ucmd; 22367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 22377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const void __user *src; 22387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t consumed, copy; 22397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_cmd cmd; 22407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ssize_t ret = 0; 22417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan void *dest; 22427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (count < sizeof(cmd.type)) { 22447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 22457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 22467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 22477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ucmd = (const struct ipath_cmd __user *) data; 22497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_from_user(&cmd.type, &ucmd->type, sizeof(cmd.type))) { 22517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 22527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 22537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 22547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan consumed = sizeof(cmd.type); 22567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan switch (cmd.type) { 2258c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case IPATH_CMD_ASSIGN_PORT: 2259c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case __IPATH_CMD_USER_INIT: 22607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_USER_INIT: 22617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.user_info); 22627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.user_info; 22637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.user_info; 22647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_RECV_CTRL: 22667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.recv_ctrl); 22677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.recv_ctrl; 22687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.recv_ctrl; 22697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_PORT_INFO: 22717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.port_info); 22727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.port_info; 22737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.port_info; 22747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_UPDATE: 22767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_FREE: 22777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.tid_info); 22787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.tid_info; 22797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.tid_info; 22807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_SET_PART_KEY: 22827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.part_key); 22837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.part_key; 22847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.part_key; 22857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 2286c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage case __IPATH_CMD_SLAVE_INFO: 22879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan copy = sizeof(cmd.cmd.slave_mask_addr); 22889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dest = &cmd.cmd.slave_mask_addr; 22899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan src = &ucmd->cmd.slave_mask_addr; 22909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan break; 2291569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones case IPATH_CMD_PIOAVAILUPD: // force an update of PIOAvail reg 2292569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones copy = 0; 2293569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones src = NULL; 2294569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones dest = NULL; 2295569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones break; 2296f2d042313e420002b06715675963cfab48ed2597Robert Walsh case IPATH_CMD_POLL_TYPE: 2297f2d042313e420002b06715675963cfab48ed2597Robert Walsh copy = sizeof(cmd.cmd.poll_type); 2298f2d042313e420002b06715675963cfab48ed2597Robert Walsh dest = &cmd.cmd.poll_type; 2299f2d042313e420002b06715675963cfab48ed2597Robert Walsh src = &ucmd->cmd.poll_type; 2300f2d042313e420002b06715675963cfab48ed2597Robert Walsh break; 23016ac50727bda29e961385e4c40318dadbb5730193Dave Olson case IPATH_CMD_ARMLAUNCH_CTRL: 23026ac50727bda29e961385e4c40318dadbb5730193Dave Olson copy = sizeof(cmd.cmd.armlaunch_ctrl); 23036ac50727bda29e961385e4c40318dadbb5730193Dave Olson dest = &cmd.cmd.armlaunch_ctrl; 23046ac50727bda29e961385e4c40318dadbb5730193Dave Olson src = &ucmd->cmd.armlaunch_ctrl; 23056ac50727bda29e961385e4c40318dadbb5730193Dave Olson break; 2306124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson case IPATH_CMD_SDMA_INFLIGHT: 2307124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson copy = sizeof(cmd.cmd.sdma_inflight); 2308124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson dest = &cmd.cmd.sdma_inflight; 2309124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson src = &ucmd->cmd.sdma_inflight; 2310124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson break; 2311124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson case IPATH_CMD_SDMA_COMPLETE: 2312124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson copy = sizeof(cmd.cmd.sdma_complete); 2313124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson dest = &cmd.cmd.sdma_complete; 2314124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson src = &ucmd->cmd.sdma_complete; 2315124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson break; 23167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan default: 23177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 23187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 23197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 23207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2321569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones if (copy) { 2322569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones if ((count - consumed) < copy) { 2323569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones ret = -EINVAL; 2324569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones goto bail; 2325569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones } 23267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2327569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones if (copy_from_user(dest, src, copy)) { 2328569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones ret = -EFAULT; 2329569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones goto bail; 2330569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones } 2331569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones 2332569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones consumed += copy; 23337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 23347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 2336c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan if (!pd && cmd.type != __IPATH_CMD_USER_INIT && 2337c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan cmd.type != IPATH_CMD_ASSIGN_PORT) { 23389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 23399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 23409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 23417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan switch (cmd.type) { 2343c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case IPATH_CMD_ASSIGN_PORT: 2344c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan ret = ipath_assign_port(fp, &cmd.cmd.user_info); 2345c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan if (ret) 2346c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan goto bail; 2347c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan break; 2348c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case __IPATH_CMD_USER_INIT: 2349c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan /* backwards compatibility, get port first */ 2350c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan ret = ipath_assign_port(fp, &cmd.cmd.user_info); 2351c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan if (ret) 2352c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan goto bail; 2353c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan /* and fall through to current version. */ 23547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_USER_INIT: 23559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_do_user_init(fp, &cmd.cmd.user_info); 23569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret) 23577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 23587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_get_base_info( 23599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan fp, (void __user *) (unsigned long) 23607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cmd.cmd.user_info.spu_base_info, 23617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cmd.cmd.user_info.spu_base_info_size); 23627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 23637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_RECV_CTRL: 23649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_manage_rcvq(pd, subport_fp(fp), cmd.cmd.recv_ctrl); 23657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 23667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_PORT_INFO: 23679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_port_info(pd, subport_fp(fp), 23687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (struct ipath_port_info __user *) 23697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) cmd.cmd.port_info); 23707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 23717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_UPDATE: 23729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_tid_update(pd, fp, &cmd.cmd.tid_info); 23737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 23747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_FREE: 23759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_tid_free(pd, subport_fp(fp), &cmd.cmd.tid_info); 23767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 23777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_SET_PART_KEY: 23787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_set_part_key(pd, cmd.cmd.part_key); 23797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 2380c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage case __IPATH_CMD_SLAVE_INFO: 23819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_get_slave_info(pd, 23829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (void __user *) (unsigned long) 23839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan cmd.cmd.slave_mask_addr); 23849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan break; 2385569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones case IPATH_CMD_PIOAVAILUPD: 2386c4b4d16e090e1b68d1d4d20a28757070982b9725Ralph Campbell ipath_force_pio_avail_update(pd->port_dd); 2387569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones break; 2388f2d042313e420002b06715675963cfab48ed2597Robert Walsh case IPATH_CMD_POLL_TYPE: 2389f2d042313e420002b06715675963cfab48ed2597Robert Walsh pd->poll_type = cmd.cmd.poll_type; 2390f2d042313e420002b06715675963cfab48ed2597Robert Walsh break; 23916ac50727bda29e961385e4c40318dadbb5730193Dave Olson case IPATH_CMD_ARMLAUNCH_CTRL: 23926ac50727bda29e961385e4c40318dadbb5730193Dave Olson if (cmd.cmd.armlaunch_ctrl) 23936ac50727bda29e961385e4c40318dadbb5730193Dave Olson ipath_enable_armlaunch(pd->port_dd); 23946ac50727bda29e961385e4c40318dadbb5730193Dave Olson else 23956ac50727bda29e961385e4c40318dadbb5730193Dave Olson ipath_disable_armlaunch(pd->port_dd); 23966ac50727bda29e961385e4c40318dadbb5730193Dave Olson break; 2397124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson case IPATH_CMD_SDMA_INFLIGHT: 2398124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson ret = ipath_sdma_get_inflight(user_sdma_queue_fp(fp), 2399124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson (u32 __user *) (unsigned long) 2400124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson cmd.cmd.sdma_inflight); 2401124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson break; 2402124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson case IPATH_CMD_SDMA_COMPLETE: 2403124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson ret = ipath_sdma_get_complete(pd->port_dd, 2404124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson user_sdma_queue_fp(fp), 2405124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson (u32 __user *) (unsigned long) 2406124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson cmd.cmd.sdma_complete); 2407124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson break; 24087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret >= 0) 24117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = consumed; 24127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 24147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 24157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 24167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2417124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olsonstatic ssize_t ipath_writev(struct kiocb *iocb, const struct iovec *iov, 2418124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson unsigned long dim, loff_t off) 2419124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson{ 2420124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct file *filp = iocb->ki_filp; 2421124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct ipath_filedata *fp = filp->private_data; 2422124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct ipath_portdata *pd = port_fp(filp); 2423124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct ipath_user_sdma_queue *pq = fp->pq; 2424124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2425124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (!dim) 2426124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return -EINVAL; 2427124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2428124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return ipath_user_sdma_writev(pd->port_dd, pq, iov, dim); 2429124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson} 2430124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 24317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct class *ipath_class; 24327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24332b8693c0617e972fc0b2fd1ebf8de97e15b656c3Arjan van de Venstatic int init_cdev(int minor, char *name, const struct file_operations *fops, 2434f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones struct cdev **cdevp, struct device **devp) 24357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 24367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const dev_t dev = MKDEV(IPATH_MAJOR, minor); 24377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct cdev *cdev = NULL; 2438f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones struct device *device = NULL; 24397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 24407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev = cdev_alloc(); 24427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cdev) { 24437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME 24447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ": Could not allocate cdev for minor %d, %s\n", 24457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name); 24467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 24477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 24487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev->owner = THIS_MODULE; 24517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev->ops = fops; 24527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kobject_set_name(&cdev->kobj, name); 24537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = cdev_add(cdev, dev, 1); 24557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 24567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME 24577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ": Could not add cdev for minor %d, %s (err %d)\n", 24587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name, -ret); 24597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto err_cdev; 24607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 246291bd418fdc8526ee70a0e8f7970b584c8870ae10Greg Kroah-Hartman device = device_create(ipath_class, NULL, dev, NULL, name); 24637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2464f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones if (IS_ERR(device)) { 2465f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones ret = PTR_ERR(device); 24667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not create " 2467f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones "device for minor %d, %s (err %d)\n", 24687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name, -ret); 24697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto err_cdev; 24707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 24737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanerr_cdev: 24757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev_del(cdev); 24767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev = NULL; 24777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 24797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret >= 0) { 24807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = cdev; 2481f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones *devp = device; 24827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 24837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = NULL; 2484f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones *devp = NULL; 24857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 24887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 24897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24902b8693c0617e972fc0b2fd1ebf8de97e15b656c3Arjan van de Venint ipath_cdev_init(int minor, char *name, const struct file_operations *fops, 2491f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones struct cdev **cdevp, struct device **devp) 24927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 2493f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones return init_cdev(minor, name, fops, cdevp, devp); 24947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 24957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void cleanup_cdev(struct cdev **cdevp, 2497f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones struct device **devp) 24987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 2499f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones struct device *dev = *devp; 25007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2501f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones if (dev) { 2502f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones device_unregister(dev); 2503f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones *devp = NULL; 25047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (*cdevp) { 25077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev_del(*cdevp); 25087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = NULL; 25097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 25117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanvoid ipath_cdev_cleanup(struct cdev **cdevp, 2513f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones struct device **devp) 25147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 2515f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones cleanup_cdev(cdevp, devp); 25167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 25177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct cdev *wildcard_cdev; 2519f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jonesstatic struct device *wildcard_dev; 25207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic const dev_t dev = MKDEV(IPATH_MAJOR, 0); 25227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int user_init(void) 25247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 25257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 25267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = register_chrdev_region(dev, IPATH_NMINORS, IPATH_DRV_NAME); 25287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 25297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not register " 25307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "chrdev region (err %d)\n", -ret); 25317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 25327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_class = class_create(THIS_MODULE, IPATH_DRV_NAME); 25357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (IS_ERR(ipath_class)) { 25377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = PTR_ERR(ipath_class); 25387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not create " 25397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "device class (err %d)\n", -ret); 25407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 25417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 25447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 25457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unregister_chrdev_region(dev, IPATH_NMINORS); 25467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 25477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 25487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 25497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void user_cleanup(void) 25517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 25527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ipath_class) { 25537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan class_destroy(ipath_class); 25547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_class = NULL; 25557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unregister_chrdev_region(dev, IPATH_NMINORS); 25587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 25597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic atomic_t user_count = ATOMIC_INIT(0); 25617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic atomic_t user_setup = ATOMIC_INIT(0); 25627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanint ipath_user_add(struct ipath_devdata *dd) 25647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 25657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan char name[10]; 25667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 25677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_inc_return(&user_count) == 1) { 25697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = user_init(); 25707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 25717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Unable to set up user support: " 25727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "error %d\n", -ret); 25737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 25747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = init_cdev(0, "ipath", &ipath_file_ops, &wildcard_cdev, 2576f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones &wildcard_dev); 25777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 25787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Could not create wildcard " 25797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "minor: error %d\n", -ret); 25800fd41363e0785247b7c19127318abc8b5eacc86bBryan O'Sullivan goto bail_user; 25817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_set(&user_setup, 1); 25847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan snprintf(name, sizeof(name), "ipath%d", dd->ipath_unit); 25877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = init_cdev(dd->ipath_unit + 1, name, &ipath_file_ops, 2589f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones &dd->user_cdev, &dd->user_dev); 25907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 25917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Could not create user minor %d, %s\n", 25927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_unit + 1, name); 25937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 25957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25960fd41363e0785247b7c19127318abc8b5eacc86bBryan O'Sullivanbail_user: 25977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan user_cleanup(); 25987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 25997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 26007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 26017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2602a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivanvoid ipath_user_remove(struct ipath_devdata *dd) 26037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 2604f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones cleanup_cdev(&dd->user_cdev, &dd->user_dev); 26057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 26067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_dec_return(&user_count) == 0) { 26077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_read(&user_setup) == 0) 26087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 26097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2610f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones cleanup_cdev(&wildcard_cdev, &wildcard_dev); 26117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan user_cleanup(); 26127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 26137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_set(&user_setup, 0); 26147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 26157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 26167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return; 26177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 2618