ipath_file_ops.c revision 60948a415859cb859e24f0dfe739069d66577466
17f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/* 2c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved. 37f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved. 47f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 57f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This software is available to you under a choice of one of two 67f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * licenses. You may choose to be licensed under the terms of the GNU 77f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * General Public License (GPL) Version 2, available from the file 87f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * COPYING in the main directory of this source tree, or the 97f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * OpenIB.org BSD license below: 107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Redistribution and use in source and binary forms, with or 127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * without modification, are permitted provided that the following 137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * conditions are met: 147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * - Redistributions of source code must retain the above 167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * copyright notice, this list of conditions and the following 177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * disclaimer. 187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * - Redistributions in binary form must reproduce the above 207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * copyright notice, this list of conditions and the following 217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * disclaimer in the documentation and/or other materials 227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * provided with the distribution. 237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * SOFTWARE. 327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/pci.h> 357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/poll.h> 367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/cdev.h> 377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/swap.h> 387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/vmalloc.h> 397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <asm/pgtable.h> 407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include "ipath_kernel.h" 4227b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan#include "ipath_common.h" 437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_open(struct inode *, struct file *); 457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_close(struct inode *, struct file *); 467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic ssize_t ipath_write(struct file *, const char __user *, size_t, 477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan loff_t *); 487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic unsigned int ipath_poll(struct file *, struct poll_table_struct *); 497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_mmap(struct file *, struct vm_area_struct *); 507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 512b8693c0617e972fc0b2fd1ebf8de97e15b656c3Arjan van de Venstatic const struct file_operations ipath_file_ops = { 527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .owner = THIS_MODULE, 537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .write = ipath_write, 547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .open = ipath_open, 557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .release = ipath_close, 567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .poll = ipath_poll, 577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .mmap = ipath_mmap 587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan}; 597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 600a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell/* 610a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell * Convert kernel virtual addresses to physical addresses so they don't 620a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell * potentially conflict with the chip addresses used as mmap offsets. 630a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell * It doesn't really matter what mmap offset we use as long as we can 640a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell * interpret it correctly. 650a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell */ 660a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbellstatic u64 cvt_kvaddr(void *p) 670a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell{ 680a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell struct page *page; 690a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell u64 paddr = 0; 700a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell 710a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell page = vmalloc_to_page(p); 720a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (page) 730a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell paddr = page_to_pfn(page) << PAGE_SHIFT; 740a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell 750a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell return paddr; 760a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell} 770a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell 789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_get_base_info(struct file *fp, 797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan void __user *ubase, size_t ubase_size) 807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd = port_fp(fp); 827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_base_info *kinfo = NULL; 847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned subport_cnt; 869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int shared, master; 879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t sz; 889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_cnt = pd->port_subport_cnt; 909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!subport_cnt) { 919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan shared = 0; 929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan master = 0; 939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_cnt = 1; 949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan shared = 1; 969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan master = !subport_fp(fp); 979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan sz = sizeof(*kinfo); 1009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* If port sharing is not requested, allow the old size structure */ 1019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!shared) 102c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage sz -= 7 * sizeof(u64); 1039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ubase_size < sz) { 1047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, 1059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "Base size %zu, need %zu (version mismatch?)\n", 1069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ubase_size, sz); 1077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 1087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 1097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo = kzalloc(sizeof(*kinfo), GFP_KERNEL); 1127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (kinfo == NULL) { 1137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 1147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 1157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = dd->ipath_f_get_base_info(pd, kinfo); 1187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 1197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 1207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdr_cnt = dd->ipath_rcvhdrcnt; 1227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdrent_size = dd->ipath_rcvhdrentsize; 1237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_tidegrcnt = dd->ipath_rcvegrcnt; 1247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbufsize = dd->ipath_rcvegrbufsize; 1257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * have to mmap whole thing 1277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbuftotlen = 1297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size; 1307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrperchunk = pd->port_rcvegrbufs_perchunk; 1317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrchunksize = kinfo->spi_rcv_egrbuftotlen / 1327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_chunks; 1339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_tidcnt = dd->ipath_rcvtidcnt / subport_cnt; 1349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (master) 1359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_tidcnt += dd->ipath_rcvtidcnt % subport_cnt; 1367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for this use, may be ipath_cfgports summed over all chips that 1387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * are are configured and present 1397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_nports = dd->ipath_cfgports; 1417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* unit (chip/board) our port is on */ 1427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_unit = dd->ipath_unit; 1437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for now, only a single page */ 1447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_tid_maxsize = PAGE_SIZE; 1457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Doing this per port, and based on the skip value, etc. This has 1487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * to be the actual buffer size, since the protocol code treats it 1497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * as an array. 1507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 1517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * These have to be set to user addresses in the user code via mmap. 1527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * These values are used on return to user code for the mmap target 1537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * addresses only. For 32 bit, same 44 bit address problem, so use 1547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the physical address, not virtual. Before 2.6.11, using the 1557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * page_address() macro worked, but in 2.6.11, even that returns the 1567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * full 64 bit address (upper bits all 1's). So far, using the 1577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * physical addresses (or chip offsets, for chip mapping) works, but 1589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * no doubt some future kernel release will change that, and we'll be 1599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * on to yet another method of dealing with this. 1607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdr_base = (u64) pd->port_rcvhdrq_phys; 1629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_rcvhdr_tailaddr = (u64) pd->port_rcvhdrqtailaddr_phys; 1637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbufs = (u64) pd->port_rcvegr_phys; 1647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_pioavailaddr = (u64) dd->ipath_pioavailregs_phys; 1657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_status = (u64) kinfo->spi_pioavailaddr + 1667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) dd->ipath_statusp - 1677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) dd->ipath_pioavailregs_dma; 1689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!shared) { 1699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piocnt = dd->ipath_pbufsport; 1709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piobufbase = (u64) pd->port_piobufs; 1719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->__spi_uregbase = (u64) dd->ipath_uregbase + 172a18e26ae442001de62f6b84a923e8613347dc35fRalph Campbell dd->ipath_ureg_align * pd->port_port; 1739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (master) { 1749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piocnt = (dd->ipath_pbufsport / subport_cnt) + 1759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_pbufsport % subport_cnt); 1769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Master's PIO buffers are after all the slave's */ 1779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piobufbase = (u64) pd->port_piobufs + 1789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign * 1799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_pbufsport - kinfo->spi_piocnt); 1809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 1819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned slave = subport_fp(fp) - 1; 1827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piocnt = dd->ipath_pbufsport / subport_cnt; 1849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piobufbase = (u64) pd->port_piobufs + 1859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign * kinfo->spi_piocnt * slave; 186c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } 187c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage if (shared) { 188c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port_uregbase = (u64) dd->ipath_uregbase + 189a18e26ae442001de62f6b84a923e8613347dc35fRalph Campbell dd->ipath_ureg_align * pd->port_port; 190c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port_rcvegrbuf = kinfo->spi_rcv_egrbufs; 191c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port_rcvhdr_base = kinfo->spi_rcvhdr_base; 192c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port_rcvhdr_tailaddr = kinfo->spi_rcvhdr_tailaddr; 193c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage 1940a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell kinfo->__spi_uregbase = cvt_kvaddr(pd->subport_uregbase + 195c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage PAGE_SIZE * subport_fp(fp)); 1969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1970a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell kinfo->spi_rcvhdr_base = cvt_kvaddr(pd->subport_rcvhdr_base + 198c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvhdrq_size * subport_fp(fp)); 199947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell kinfo->spi_rcvhdr_tailaddr = 0; 2000a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell kinfo->spi_rcv_egrbufs = cvt_kvaddr(pd->subport_rcvegrbuf + 201c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size * 202c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage subport_fp(fp)); 203c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage 204c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_subport_uregbase = 205c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage cvt_kvaddr(pd->subport_uregbase); 206c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_subport_rcvegrbuf = 207c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage cvt_kvaddr(pd->subport_rcvegrbuf); 208c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_subport_rcvhdr_base = 209c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage cvt_kvaddr(pd->subport_rcvhdr_base); 210c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage ipath_cdbg(PROC, "port %u flags %x %llx %llx %llx\n", 211c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port, kinfo->spi_runtime_flags, 212c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage (unsigned long long) kinfo->spi_subport_uregbase, 213c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage (unsigned long long) kinfo->spi_subport_rcvegrbuf, 214c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage (unsigned long long) kinfo->spi_subport_rcvhdr_base); 2159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 2169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 2179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_pioindex = (kinfo->spi_piobufbase - dd->ipath_piobufbase) / 2189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign; 2197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_pioalign = dd->ipath_palign; 2207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_qpair = IPATH_KD_QP; 2227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_piosize = dd->ipath_ibmaxlen; 2237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_mtu = dd->ipath_ibmaxlen; /* maxlen, not ibmtu */ 2247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_port = pd->port_port; 2259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_subport = subport_fp(fp); 226eaf6733bc176742fb08def2269441684e963c275Bryan O'Sullivan kinfo->spi_sw_version = IPATH_KERN_SWVERSION; 2277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_hw_version = dd->ipath_revision; 2287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (master) { 2309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_runtime_flags |= IPATH_RUNTIME_MASTER; 2319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 2329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 233c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage sz = (ubase_size < sizeof(*kinfo)) ? ubase_size : sizeof(*kinfo); 234c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage if (copy_to_user(ubase, kinfo, sz)) 2357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 2367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 2387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kfree(kinfo); 2397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 2407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 2417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 2437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_tid_update - update a port TID 2447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 2459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * @fp: the ipath device file 2467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @ti: the TID information 2477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * The new implementation as of Oct 2004 is that the driver assigns 2497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the tid and returns it to the caller. To make it easier to 2507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * catch bugs, and to reduce search time, we keep a cursor for 2517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * each port, walking the shadow tid array to find one that's not 2527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in use. 2537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * For now, if we can't allocate the full list, we fail, although 2557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in the long run, we'll allocate as many as we can, and the 2567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * caller will deal with that by trying the remaining pages later. 2577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * That means that when we fail, we have to mark the tids as not in 2587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * use again, in our shadow copy. 2597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * It's up to the caller to free the tids when they are done. 2617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We'll unlock the pages as they free them. 2627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Also, right now we are locking one page at a time, but since 2647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the intended use of this routine is for a single group of 2657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * virtually contiguous pages, that should change to improve 2667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * performance. 2677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 2689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_tid_update(struct ipath_portdata *pd, struct file *fp, 2697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_tid_info *ti) 2707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 2717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0, ntids; 2729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan u32 tid, porttid, cnt, i, tidcnt, tidoff; 2737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u16 *tidlist; 2747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 2757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 physaddr; 2767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long vaddr; 2777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 __iomem *tidbase; 2787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long tidmap[8]; 2797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct page **pagep = NULL; 2809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned subport = subport_fp(fp); 2817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow) { 2837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 2847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 2857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt = ti->tidcnt; 2887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cnt) { 2897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("After copyin, tidcnt 0, tidlist %llx\n", 2907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) ti->tidlist); 2917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 2927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Should we treat as success? likely a bug 2937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 2947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 2957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 2967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid = pd->port_port * dd->ipath_rcvtidcnt; 2989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) { 2999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt; 3009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tid = pd->port_tidcursor; 3019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidoff = 0; 3029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (!subport) { 3039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) + 3049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_rcvtidcnt % pd->port_subport_cnt); 3059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidoff = dd->ipath_rcvtidcnt - tidcnt; 3069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += tidoff; 3079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tid = tidcursor_fp(fp); 3089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 3099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt; 3109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidoff = tidcnt * (subport - 1); 3119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += tidoff; 3129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tid = tidcursor_fp(fp); 3139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 3149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (cnt > tidcnt) { 3157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* make sure it all fits in port_tid_pg_list */ 3167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "Process tried to allocate %u " 3177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "TIDs, only trying max (%u)\n", cnt, tidcnt); 3187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt = tidcnt; 3197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pagep = &((struct page **) pd->port_tid_pg_list)[tidoff]; 3219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidlist = &((u16 *) &pagep[dd->ipath_rcvtidcnt])[tidoff]; 3227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan memset(tidmap, 0, sizeof(tidmap)); 3247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* before decrement; chip actual # */ 3257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ntids = tidcnt; 3267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidbase = (u64 __iomem *) (((char __iomem *) dd->ipath_kregbase) + 3277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidbase + 3287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid * sizeof(*tidbase)); 3297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port%u %u tids, cursor %u, tidbase %p\n", 3317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, cnt, tid, tidbase); 3327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* virtual address of first page in transfer */ 3347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vaddr = ti->tidvaddr; 3357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!access_ok(VERIFY_WRITE, (void __user *) vaddr, 3367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt * PAGE_SIZE)) { 3377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Fail vaddr %p, %u pages, !access_ok\n", 3387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *)vaddr, cnt); 3397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 3407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_get_user_pages(vaddr, cnt, pagep); 3437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) { 3447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret == -EBUSY) { 3457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to lock addr %p, %u pages " 3467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(already locked)\n", 3477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) vaddr, cnt); 3487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 3497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for now, continue, and see what happens but with 3507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the new implementation, this should never happen, 3517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * unless perhaps the user has mpin'ed the pages 3527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * themselves (something we need to test) 3537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 3557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 3567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 3577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "Failed to lock addr %p, %u pages: " 3587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "errno %d\n", (void *) vaddr, cnt, -ret); 3597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < cnt; i++, vaddr += PAGE_SIZE) { 3637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (; ntids--; tid++) { 3647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (tid == tidcnt) 3657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = 0; 3667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow[porttid + tid]) 3677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 3687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ntids < 0) { 3707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 3717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * oops, wrapped all the way through their TIDs, 3727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * and didn't have enough free; see comments at 3737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * start of routine 3747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Not enough free TIDs for %u pages " 3767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(index %d), failing\n", cnt, i); 3777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan i--; /* last tidlist[i] not filled in */ 3787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 3797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 3807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidlist[i] = tid + tidoff; 3827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Updating idx %u to TID %u, " 3839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "vaddr %lx\n", i, tid + tidoff, vaddr); 3847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* we "know" system pages and TID pages are same size */ 3857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[porttid + tid] = pagep[i]; 3861fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_physshadow[porttid + tid] = ipath_map_page( 3871fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->pcidev, pagep[i], 0, PAGE_SIZE, 3881fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PCI_DMA_FROMDEVICE); 3897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 3907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * don't need atomic or it's overhead 3917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan __set_bit(tid, tidmap); 3931fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan physaddr = dd->ipath_physshadow[porttid + tid]; 3947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pagelocks++; 3957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, 3967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "TID %u, vaddr %lx, physaddr %llx pgp %p\n", 3977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid, vaddr, (unsigned long long) physaddr, 3987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pagep[i]); 399f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger dd->ipath_f_put_tid(dd, &tidbase[tid], RCVHQ_RCV_TYPE_EXPECTED, 400f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger physaddr); 4017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 4027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * don't check this tid in ipath_portshadow, since we 4037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * just filled it in; start with the next one. 4047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid++; 4067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) { 4097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 limit; 4107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cleanup: 4117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* jump here if copy out of updated info failed... */ 4127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("After failure (ret=%d), undo %d of %d entries\n", 4137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan -ret, i, cnt); 4147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* same code that's in ipath_free_tid() */ 4157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = sizeof(tidmap) * BITS_PER_BYTE; 4167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (limit > tidcnt) 4177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* just in case size changes in future */ 4187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = tidcnt; 4197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = find_first_bit((const unsigned long *)tidmap, limit); 4207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (; tid < limit; tid++) { 4217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!test_bit(tid, tidmap)) 4227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 4237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pageshadow[porttid + tid]) { 4247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Freeing TID %u\n", 4257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid); 426f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger dd->ipath_f_put_tid(dd, &tidbase[tid], 427f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger RCVHQ_RCV_TYPE_EXPECTED, 4287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_tidinvalid); 4291fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pci_unmap_page(dd->pcidev, 4301fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_physshadow[porttid + tid], 4311fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PAGE_SIZE, PCI_DMA_FROMDEVICE); 4327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[porttid + tid] = NULL; 4337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 4347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_release_user_pages(pagep, cnt); 4377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 4387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 4397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Copy the updated array, with ipath_tid's filled in, back 4407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * to user. Since we did the copy in already, this "should 4417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * never fail" If it does, we have to clean up... 4427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user((void __user *) 4447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) ti->tidlist, 4457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidlist, cnt * sizeof(*tidlist))) { 4467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 4477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto cleanup; 4487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user((void __user *) (unsigned long) ti->tidmap, 4507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidmap, sizeof tidmap)) { 4517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 4527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto cleanup; 4537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (tid == tidcnt) 4557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = 0; 4569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) 4579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_tidcursor = tid; 4589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else 4599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcursor_fp(fp) = tid; 4607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 4637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 4647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to map %u TID pages, failing with %d\n", 4657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, -ret); 4667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 4677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 4687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 4707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_tid_free - free a port TID 4717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 4729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * @subport: the subport 4737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @ti: the TID info 4747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 4757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * right now we are unlocking one page at a time, but since 4767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the intended use of this routine is for a single group of 4777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * virtually contiguous pages, that should change to improve 4787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * performance. We check that the TID is in range for this port 4797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * but otherwise don't check validity; if user has an error and 4807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * frees the wrong tid, it's only their own data that can thereby 4817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * be corrupted. We do check that the TID was in use, for sanity 4827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We always use our idea of the saved address, not the address that 4837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * they pass in to us. 4847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_tid_free(struct ipath_portdata *pd, unsigned subport, 4877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_tid_info *ti) 4887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 4897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 4907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 tid, porttid, cnt, limit, tidcnt; 4917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 4927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 __iomem *tidbase; 4937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long tidmap[8]; 4947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow) { 4967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 4977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 4987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_from_user(tidmap, (void __user *)(unsigned long)ti->tidmap, 5017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan sizeof tidmap)) { 5027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 5037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 5047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid = pd->port_port * dd->ipath_rcvtidcnt; 5079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) 5089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt; 5099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (!subport) { 5109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) + 5119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_rcvtidcnt % pd->port_subport_cnt); 5129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += dd->ipath_rcvtidcnt - tidcnt; 5139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 5149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt; 5159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += tidcnt * (subport - 1); 5169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 5177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) + 5187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidbase + 5197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid * sizeof(*tidbase)); 5207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = sizeof(tidmap) * BITS_PER_BYTE; 5227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (limit > tidcnt) 5237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* just in case size changes in future */ 5247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = tidcnt; 5257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = find_first_bit(tidmap, limit); 5267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port%u free %u tids; first bit (max=%d) " 5277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "set is %d, porttid %u\n", pd->port_port, ti->tidcnt, 5287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit, tid, porttid); 5297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (cnt = 0; tid < limit; tid++) { 5307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 5317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * small optimization; if we detect a run of 3 or so without 5327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * any set, use find_first_bit again. That's mainly to 5337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * accelerate the case where we wrapped, so we have some at 5347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the beginning, and some at the end, and a big gap 5357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in the middle. 5367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 5377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!test_bit(tid, tidmap)) 5387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 5397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt++; 5407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pageshadow[porttid + tid]) { 5413ac8c70f74ca67111c570f4ba828cc4b6fc229f4Dave Olson struct page *p; 5423ac8c70f74ca67111c570f4ba828cc4b6fc229f4Dave Olson p = dd->ipath_pageshadow[porttid + tid]; 5433ac8c70f74ca67111c570f4ba828cc4b6fc229f4Dave Olson dd->ipath_pageshadow[porttid + tid] = NULL; 5447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "PID %u freeing TID %u\n", 5457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pid, tid); 546f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger dd->ipath_f_put_tid(dd, &tidbase[tid], 547f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger RCVHQ_RCV_TYPE_EXPECTED, 5487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_tidinvalid); 5491fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pci_unmap_page(dd->pcidev, 5501fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_physshadow[porttid + tid], 5511fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PAGE_SIZE, PCI_DMA_FROMDEVICE); 5523ac8c70f74ca67111c570f4ba828cc4b6fc229f4Dave Olson ipath_release_user_pages(&p, 1); 5537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 5547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else 5557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Unused tid %u, ignoring\n", tid); 5567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cnt != ti->tidcnt) 5587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("passed in tidcnt %d, only %d bits set in map\n", 5597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, cnt); 5607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 5617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 5627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to unmap %u TID pages, failing with %d\n", 5637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, -ret); 5647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 5657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 5667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 5687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_set_part_key - set a partition key 5697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 5707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @key: the key 5717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 5727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We can have up to 4 active at a time (other than the default, which is 5737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * always allowed). This is somewhat tricky, since multiple ports may set 5747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the same key, so we reference count them, and clean up at exit. All 4 5757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * partition keys are packed into a single infinipath register. It's an 5767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * error for a process to set the same pkey multiple times. We provide no 5777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * mechanism to de-allocate a pkey at this time, we may eventually need to 5787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * do that. I've used the atomic operations, and no locking, and only make 5797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * a single pass through what's available. This should be more than 5807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * adequate for some time. I'll think about spinlocks or the like if and as 5817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * it's necessary. 5827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 5837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_set_part_key(struct ipath_portdata *pd, u16 key) 5847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 5857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 5867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, any = 0, pidx = -1; 5877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u16 lkey = key & 0x7FFF; 5887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 5897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 59027b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan if (lkey == (IPATH_DEFAULT_P_KEY & 0x7FFF)) { 5917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* nothing to do; this key always valid */ 5927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 5937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 5947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u try to set pkey %hx, current keys " 5977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%hx:%x %hx:%x %hx:%x %hx:%x\n", 5987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, dd->ipath_pkeys[0], 5997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[0]), dd->ipath_pkeys[1], 6007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[1]), dd->ipath_pkeys[2], 6017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[2]), dd->ipath_pkeys[3], 6027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[3])); 6037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!lkey) { 6057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "p%u tries to set key 0, not allowed\n", 6067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port); 6077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 6087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 6127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Set the full membership bit, because it has to be 6137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * set in the register or the packet, and it seems 6147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * cleaner to set in the register than to force all 6157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * callers to set it. (see bug 4331) 6167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan key |= 0x8000; 6187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) { 6207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_pkeys[i] && pidx == -1) 6217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pidx = i; 6227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_pkeys[i] == key) { 6237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u tries to set same pkey " 6247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(%x) more than once\n", 6257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key); 6267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EEXIST; 6277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pidx == -1) { 6317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("All pkeys for port %u already in use, " 6327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 6337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 6347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) { 6377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pkeys[i]) { 6387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan any++; 6397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 6407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pkeys[i] == key) { 6427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_t *pkrefs = &dd->ipath_pkeyrefs[i]; 6437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_inc_return(pkrefs) > 1) { 6457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[pidx] = key; 6467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u set key %x " 6477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "matches #%d, count now %d\n", 6487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, i, 6497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(pkrefs)); 6507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 6517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 6537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 6547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * lost race, decrement count, catch below 6557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_dec(pkrefs); 6577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Lost race, count was " 6587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "0, after dec, it's %d\n", 6597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(pkrefs)); 6607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan any++; 6617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) { 6647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 6657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * It makes no sense to have both the limited and 6667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * full membership PKEY set at the same time since 6677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the unlimited one will disable the limited one. 6687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EEXIST; 6707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!any) { 6747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u, all pkeys already in use, " 6757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 6767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 6777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) { 6807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pkeys[i] && 6817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) { 6827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pkey; 6837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for ipathstats, etc. */ 6857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pkeys[i] = lkey; 6867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[pidx] = dd->ipath_pkeys[i] = key; 6877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pkey = 6887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (u64) dd->ipath_pkeys[0] | 6897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 6907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 6917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 6927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "p%u set key %x in #%d, " 6937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "portidx %d, new pkey reg %llx\n", 6947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, i, pidx, 6957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pkey); 6967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg( 6977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd, dd->ipath_kregs->kr_partitionkey, pkey); 6987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 7007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 7017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u, all pkeys already in use 2nd pass, " 7047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 7057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 7067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 7087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 7097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 7107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 7127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_manage_rcvq - manage a port's receive queue 7137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 7149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * @subport: the subport 7157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @start_stop: action to carry out 7167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 7177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * start_stop == 0 disables receive on the port, for use in queue 7187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * overflow conditions. start_stop==1 re-enables, to be used to 7197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * re-init the software copy of the head register 7207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 7219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_manage_rcvq(struct ipath_portdata *pd, unsigned subport, 7229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int start_stop) 7237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 7247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 7257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(PROC, "%sabling rcv for unit %u port %u:%u\n", 7277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan start_stop ? "en" : "dis", dd->ipath_unit, 7289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, subport); 7299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (subport) 7309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 7317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* atomically clear receive enable port. */ 7327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (start_stop) { 7337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 7347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * On enable, force in-memory copy of the tail register to 7357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 0, so that protocol code doesn't have to worry about 7367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * whether or not the chip has yet updated the in-memory 7377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * copy or not on return from the system call. The chip 7387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * always resets it's tail register back to 0 on a 7397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * transition from disabled to enabled. This could cause a 7407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * problem if software was broken, and did the enable w/o 7417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the disable, but eventually the in-memory copy will be 7427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * updated and correct itself, even in the face of software 7437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * bugs. 7447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 745c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell if (pd->port_rcvhdrtail_kvaddr) 746c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell ipath_clear_rcvhdrtail(pd); 747d8274869d742c3d8082e1428de47e54d12104928Dave Olson set_bit(dd->ipath_r_portenable_shift + pd->port_port, 7487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_rcvctrl); 7497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else 750d8274869d742c3d8082e1428de47e54d12104928Dave Olson clear_bit(dd->ipath_r_portenable_shift + pd->port_port, 7517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_rcvctrl); 7527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 7537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl); 7547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* now be sure chip saw it before we return */ 75544f8e3f3f7d8e61b4aafced278403955fe18ad88Roland Dreier ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); 7567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (start_stop) { 7577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 7587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * And try to be sure that tail reg update has happened too. 7597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This should in theory interlock with the RXE changes to 7607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the tail register. Don't assign it to the tail register 7617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in memory copy, since we could overwrite an update by the 7627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * chip if we did. 7637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 76444f8e3f3f7d8e61b4aafced278403955fe18ad88Roland Dreier ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); 7657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* always; new head should be equal to new tail; see above */ 7679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 7687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return 0; 7697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 7707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void ipath_clean_part_key(struct ipath_portdata *pd, 7727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd) 7737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 7747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, j, pchanged = 0; 7757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 oldpkey; 7767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for debugging only */ 7787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan oldpkey = (u64) dd->ipath_pkeys[0] | 7797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 7807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 7817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 7827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) { 7847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_pkeys[i]) 7857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 7867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "look for key[%d] %hx in pkeys\n", i, 7877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i]); 7887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (j = 0; j < ARRAY_SIZE(dd->ipath_pkeys); j++) { 7897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* check for match independent of the global bit */ 7907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((dd->ipath_pkeys[j] & 0x7fff) != 7917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (pd->port_pkeys[i] & 0x7fff)) 7927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 7937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_dec_and_test(&dd->ipath_pkeyrefs[j])) { 7947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u clear key " 7957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%x matches #%d\n", 7967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, 7977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i], j); 7987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pkeys[j] = 7997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pkeys[j] = 0; 8007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pchanged++; 8017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else ipath_cdbg( 8037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan VERBOSE, "p%u key %x matches #%d, " 8047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "but ref still %d\n", pd->port_port, 8057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i], j, 8067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[j])); 8077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 8087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i] = 0; 8107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pchanged) { 8127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pkey = (u64) dd->ipath_pkeys[0] | 8137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 8147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 8157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 8167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u old pkey reg %llx, " 8177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "new pkey reg %llx\n", pd->port_port, 8187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) oldpkey, 8197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pkey); 8207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey, 8217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pkey); 8227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 8247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan/* 8269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Initialize the port data with the receive buffer sizes 8279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * so this can be done while the master port is locked. 8289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Otherwise, there is a race with a slave opening the port 8299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * and seeing these fields uninitialized. 8309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 8319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic void init_user_egr_sizes(struct ipath_portdata *pd) 8329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 8339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 8349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned egrperchunk, egrcnt, size; 8359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 8369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 8379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * to avoid wasting a lot of memory, we allocate 32KB chunks of 8389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * physically contiguous memory, advance through it until used up 8399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * and then allocate more. Of course, we need memory to store those 8409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * extra pointers, now. Started out with 256KB, but under heavy 8419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * memory pressure (creating large files and then copying them over 8429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * NFS while doing lots of MPI jobs), we hit some allocation 8439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * failures, even though we can sleep... (2.6.10) Still get 8449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * failures at 64K. 32K is the lowest we can go without wasting 8459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * additional memory. 8469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 8479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = 0x8000; 8489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan egrperchunk = size / dd->ipath_rcvegrbufsize; 8499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan egrcnt = dd->ipath_rcvegrcnt; 8509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf_chunks = (egrcnt + egrperchunk - 1) / egrperchunk; 8519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbufs_perchunk = egrperchunk; 8529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf_size = size; 8539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 8549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 8557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 8567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_create_user_egr - allocate eager TID buffers 8577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port to allocate TID buffers for 8587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 8597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This routine is now quite different for user and kernel, because 8607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the kernel uses skb's, for the accelerated network performance 8617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This is the user port version 8627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 8637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Allocate the eager TID buffers and program them into infinipath 8647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * They are no longer completely contiguous, we do multiple allocation 8657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * calls. 8667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 8677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_create_user_egr(struct ipath_portdata *pd) 8687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 8697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 8709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned e, egrcnt, egrperchunk, chunk, egrsize, egroff; 8717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t size; 8727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 8730ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan gfp_t gfp_flags; 8740ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan 8750ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan /* 8760ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * GFP_USER, but without GFP_FS, so buffer cache can be 8770ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * coalesced (we hope); otherwise, even at order 4, 8780ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * heavy filesystem activity makes these fail, and we can 8790ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * use compound pages. 8800ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan */ 8810ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan gfp_flags = __GFP_WAIT | __GFP_IO | __GFP_COMP; 8827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egrcnt = dd->ipath_rcvegrcnt; 8847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* TID number offset for this port */ 88560948a415859cb859e24f0dfe739069d66577466Ralph Campbell egroff = (pd->port_port - 1) * egrcnt + dd->ipath_p0_rcvegrcnt; 8867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egrsize = dd->ipath_rcvegrbufsize; 8877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Allocating %d egr buffers, at egrtid " 8887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "offset %x, egrsize %u\n", egrcnt, egroff, egrsize); 8897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan chunk = pd->port_rcvegrbuf_chunks; 8919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan egrperchunk = pd->port_rcvegrbufs_perchunk; 8929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = pd->port_rcvegrbuf_size; 8939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf = kmalloc(chunk * sizeof(pd->port_rcvegrbuf[0]), 8949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan GFP_KERNEL); 8957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf) { 8967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 8977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 8987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys = 9009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kmalloc(chunk * sizeof(pd->port_rcvegrbuf_phys[0]), 9019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan GFP_KERNEL); 9027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf_phys) { 9037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 9047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail_rcvegrbuf; 9057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) { 9077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf[e] = dma_alloc_coherent( 9097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->pcidev->dev, size, &pd->port_rcvegrbuf_phys[e], 9107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan gfp_flags); 9117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf[e]) { 9137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 9147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail_rcvegrbuf_phys; 9157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegr_phys = pd->port_rcvegrbuf_phys[0]; 9197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = chunk = 0; chunk < pd->port_rcvegrbuf_chunks; chunk++) { 9217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dma_addr_t pa = pd->port_rcvegrbuf_phys[chunk]; 9227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned i; 9237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; e < egrcnt && i < egrperchunk; e++, i++) { 9257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_f_put_tid(dd, e + egroff + 9267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (u64 __iomem *) 9277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((char __iomem *) 9287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_kregbase + 929f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger dd->ipath_rcvegrbase), 930f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger RCVHQ_RCV_TYPE_EAGER, pa); 9317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pa += egrsize; 9327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cond_resched(); /* don't hog the cpu */ 9347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 9377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 9387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail_rcvegrbuf_phys: 9407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = 0; e < pd->port_rcvegrbuf_chunks && 941f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan pd->port_rcvegrbuf[e]; e++) { 9427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dma_free_coherent(&dd->pcidev->dev, size, 9437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf[e], 9447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys[e]); 9457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 946f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 9479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(pd->port_rcvegrbuf_phys); 9487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys = NULL; 9497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail_rcvegrbuf: 9509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(pd->port_rcvegrbuf); 9517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf = NULL; 9527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 9537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 9547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 9557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 956f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 957f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan/* common code for the mappings on dma_alloc_coherent mem */ 958f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivanstatic int ipath_mmap_mem(struct vm_area_struct *vma, 9591fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan struct ipath_portdata *pd, unsigned len, int write_ok, 9601fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan void *kvaddr, char *what) 961f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan{ 962f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 9631fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan unsigned long pfn; 964f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan int ret; 965f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 966f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > len) { 967f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dev_info(&dd->pcidev->dev, 968f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "FAIL on %s: len %lx > %x\n", what, 969f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_end - vma->vm_start, len); 970f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = -EFAULT; 971f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan goto bail; 972f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 973f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 974f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (!write_ok) { 975f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (vma->vm_flags & VM_WRITE) { 976f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dev_info(&dd->pcidev->dev, 977f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "%s must be mapped readonly\n", what); 978f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = -EPERM; 979f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan goto bail; 980f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 981f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 982f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* don't allow them to later change with mprotect */ 983f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYWRITE; 984f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 985f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 9861fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pfn = virt_to_phys(kvaddr) >> PAGE_SHIFT; 987f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = remap_pfn_range(vma, vma->vm_start, pfn, 988f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan len, vma->vm_page_prot); 989f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (ret) 9901fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dev_info(&dd->pcidev->dev, "%s port%u mmap of %lx, %x " 9911fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan "bytes r%c failed: %d\n", what, pd->port_port, 9921fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pfn, len, write_ok?'w':'o', ret); 993f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan else 9941fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan ipath_cdbg(VERBOSE, "%s port%u mmaped %lx, %x bytes " 9951fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan "r%c\n", what, pd->port_port, pfn, len, 9961fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan write_ok?'w':'o'); 997f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivanbail: 998f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan return ret; 999f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan} 1000f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 10017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_ureg(struct vm_area_struct *vma, struct ipath_devdata *dd, 10027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 ureg) 10037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long phys; 10057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 10067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1007f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* 1008f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * This is real hardware, so use io_remap. This is the mechanism 1009f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * for the user process to update the head registers for their port 1010f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * in the chip. 1011f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan */ 10127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > PAGE_SIZE) { 10137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL mmap userreg: reqlen " 10147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%lx > PAGE\n", vma->vm_end - vma->vm_start); 10157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 10167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 10177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys = dd->ipath_physaddr + ureg; 10187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 10197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; 10217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = io_remap_pfn_range(vma, vma->vm_start, 10227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys >> PAGE_SHIFT, 10237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 10247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot); 10257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 10277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 10287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_piobufs(struct vm_area_struct *vma, 10307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd, 10319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd, 10329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned piobufs, unsigned piocnt) 10337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long phys; 10357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 10367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1038f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * When we map the PIO buffers in the chip, we want to map them as 1039f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * writeonly, no read possible. This prevents access to previous 1040f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * process data, and catches users who might try to read the i/o 1041f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * space due to a bug. 10427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 10439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > (piocnt * dd->ipath_palign)) { 10447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL mmap piobufs: " 10457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "reqlen %lx > PAGE\n", 10467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start); 10479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 10487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan phys = dd->ipath_physaddr + piobufs; 1052f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 1053eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan#if defined(__powerpc__) 1054eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan /* There isn't a generic way to specify writethrough mappings */ 1055eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; 1056eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) |= _PAGE_WRITETHRU; 1057eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) &= ~_PAGE_GUARDED; 1058eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan#endif 1059eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan 1060367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan /* 1061367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan * don't allow them to later change to readable with mprotect (for when 1062367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan * not initially mapped readable, as is normally the case) 1063367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan */ 1064f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYREAD; 10657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; 10667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = io_remap_pfn_range(vma, vma->vm_start, phys >> PAGE_SHIFT, 10687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 10697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot); 10707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 10717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 10727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 10737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_rcvegrbufs(struct vm_area_struct *vma, 10757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd) 10767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 10787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long start, size; 10797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t total_size, i; 10801fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan unsigned long pfn; 10817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 10827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size = pd->port_rcvegrbuf_size; 10847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan total_size = pd->port_rcvegrbuf_chunks * size; 10857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > total_size) { 10867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL on egr bufs: " 10877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "reqlen %lx > actual %lx\n", 10887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 10897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) total_size); 10909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 10917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (vma->vm_flags & VM_WRITE) { 10957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "Can't map eager buffers as " 10967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "writable (flags=%lx)\n", vma->vm_flags); 10977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EPERM; 10987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1100f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* don't allow them to later change to writeable with mprotect */ 1101f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYWRITE; 11027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan start = vma->vm_start; 11047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < pd->port_rcvegrbuf_chunks; i++, start += size) { 11061fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pfn = virt_to_phys(pd->port_rcvegrbuf[i]) >> PAGE_SHIFT; 11071fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan ret = remap_pfn_range(vma, start, pfn, size, 11081fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan vma->vm_page_prot); 11097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 11107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 11117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 11127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 11137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 11157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 11167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 11177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan/* 11193c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin * ipath_file_vma_fault - handle a VMA page fault. 11209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 11213c8450860ba9d6279dbc969633eacf99161860d9Nick Pigginstatic int ipath_file_vma_fault(struct vm_area_struct *vma, 11223c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin struct vm_fault *vmf) 11239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 11243c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin struct page *page; 11259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11263c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT)); 11279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!page) 11283c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin return VM_FAULT_SIGBUS; 11299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan get_page(page); 11303c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin vmf->page = page; 11313c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin 11323c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin return 0; 11339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 11349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic struct vm_operations_struct ipath_file_vm_ops = { 11363c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin .fault = ipath_file_vma_fault, 11379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan}; 11389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int mmap_kvaddr(struct vm_area_struct *vma, u64 pgaddr, 11409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd, unsigned subport) 11419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 11429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned long len; 11439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_devdata *dd; 11449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan void *addr; 11459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t size; 11460a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell int ret = 0; 11479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* If the port is not shared, all addresses should be physical */ 11490a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (!pd->port_subport_cnt) 11509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 11519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd = pd->port_dd; 11539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size; 11549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 1156c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * Each process has all the subport uregbase, rcvhdrq, and 1157c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * rcvegrbufs mmapped - as an array for all the processes, 1158c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * and also separately for this process. 11599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 1160c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage if (pgaddr == cvt_kvaddr(pd->subport_uregbase)) { 1161c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_uregbase; 1162c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size = PAGE_SIZE * pd->port_subport_cnt; 1163c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base)) { 1164c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_rcvhdr_base; 1165c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size = pd->port_rcvhdrq_size * pd->port_subport_cnt; 1166c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf)) { 1167c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_rcvegrbuf; 1168c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size *= pd->port_subport_cnt; 1169c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_uregbase + 1170c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage PAGE_SIZE * subport)) { 1171c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_uregbase + PAGE_SIZE * subport; 1172c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size = PAGE_SIZE; 1173c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base + 1174c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvhdrq_size * subport)) { 1175c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_rcvhdr_base + 1176c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvhdrq_size * subport; 1177c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size = pd->port_rcvhdrq_size; 1178c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf + 1179c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size * subport)) { 1180c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_rcvegrbuf + size * subport; 1181c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage /* rcvegrbufs are read-only on the slave */ 1182c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage if (vma->vm_flags & VM_WRITE) { 1183c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage dev_info(&dd->pcidev->dev, 1184c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage "Can't map eager buffers as " 1185c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage "writable (flags=%lx)\n", vma->vm_flags); 1186c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage ret = -EPERM; 1187c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage goto bail; 1188c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } 1189c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage /* 1190c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * Don't allow permission to later change to writeable 1191c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * with mprotect. 1192c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage */ 1193c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage vma->vm_flags &= ~VM_MAYWRITE; 1194c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else { 11959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 1196c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } 11979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan len = vma->vm_end - vma->vm_start; 11989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (len > size) { 11999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(MM, "FAIL: reqlen %lx > %zx\n", len, size); 12009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 12019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 12029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 12039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_pgoff = (unsigned long) addr >> PAGE_SHIFT; 12059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_ops = &ipath_file_vm_ops; 12069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_flags |= VM_RESERVED | VM_DONTEXPAND; 12070a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell ret = 1; 12089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 12109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 12119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 12129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 12147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_mmap - mmap various structures into user space 12157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @fp: the file pointer 12167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @vma: the VM area 12177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 12187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We use this to have a shared buffer between the kernel and the user code 12197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for the rcvhdr queue, egr buffers, and the per-port user regs and pio 12207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * buffers in the chip. We have the open and close entries so we can bump 12217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the ref count and keep the driver from being unloaded while still mapped. 12227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_mmap(struct file *fp, struct vm_area_struct *vma) 12247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 12257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 12267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 12277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pgaddr, ureg; 12289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned piobufs, piocnt; 12297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 12307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 12329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd) { 12339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 12349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 12359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 12367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 1237f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 12387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 12397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This is the ipath_do_user_init() code, mapping the shared buffers 12407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * into the user process. The address referred to by vm_pgoff is the 12419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * file offset passed via mmap(). For shared ports, this is the 12429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * kernel vmalloc() address of the pages to share with the master. 12439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * For non-shared or master ports, this is a physical address. 12449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * We only do one mmap for each space mapped. 12457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pgaddr = vma->vm_pgoff << PAGE_SHIFT; 12477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 12499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Check for 0 in case one of the allocations failed, but user 12509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * called mmap anyway. 12517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pgaddr) { 12539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 12549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 1255f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 12567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(MM, "pgaddr %llx vm_start=%lx len %lx port %u:%u:%u\n", 12587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pgaddr, vma->vm_start, 12599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_end - vma->vm_start, dd->ipath_unit, 12609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, subport_fp(fp)); 12617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 12639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Physical addresses must fit in 40 bits for our hardware. 12649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Check for kernel virtual addresses first, anything else must 12659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * match a HW or memory address. 12669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 12670a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell ret = mmap_kvaddr(vma, pgaddr, pd, subport_fp(fp)); 12680a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (ret) { 12690a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (ret > 0) 12700a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell ret = 0; 12719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 12729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 12739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1274a18e26ae442001de62f6b84a923e8613347dc35fRalph Campbell ureg = dd->ipath_uregbase + dd->ipath_ureg_align * pd->port_port; 12759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) { 12769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* port is not shared */ 12779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piocnt = dd->ipath_pbufsport; 12789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piobufs = pd->port_piobufs; 12799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (!subport_fp(fp)) { 12809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* caller is the master */ 12819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piocnt = (dd->ipath_pbufsport / pd->port_subport_cnt) + 12829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_pbufsport % pd->port_subport_cnt); 12839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piobufs = pd->port_piobufs + 12849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign * (dd->ipath_pbufsport - piocnt); 12859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 12869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned slave = subport_fp(fp) - 1; 12879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* caller is a slave */ 12899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piocnt = dd->ipath_pbufsport / pd->port_subport_cnt; 12909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piobufs = pd->port_piobufs + dd->ipath_palign * piocnt * slave; 1291f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 12929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (pgaddr == ureg) 12947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_ureg(vma, dd, ureg); 12959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == piobufs) 12969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = mmap_piobufs(vma, dd, pd, piobufs, piocnt); 12979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == dd->ipath_pioavailregs_phys) 12989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* in-memory copy of pioavail registers */ 12999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0, 13001fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan (void *) dd->ipath_pioavailregs_dma, 13019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "pioavail registers"); 13029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == pd->port_rcvegr_phys) 13037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_rcvegrbufs(vma, pd); 13049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == (u64) pd->port_rcvhdrq_phys) 1305f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* 1306525d0ca1d452ed336c1d907fb20c104467a8a47bBryan O'Sullivan * The rcvhdrq itself; readonly except on HT (so have 1307f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * to allow writable mapping), multiple pages, contiguous 1308f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * from an i/o perspective. 1309f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan */ 13109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, pd->port_rcvhdrq_size, 1, 13111fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pd->port_rcvhdrq, 1312f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "rcvhdrq"); 13139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == (u64) pd->port_rcvhdrqtailaddr_phys) 1314f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* in-memory copy of rcvhdrq tail register */ 1315f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0, 13161fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pd->port_rcvhdrtail_kvaddr, 1317f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "rcvhdrq tail"); 13187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else 13197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 13207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_private_data = NULL; 13227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 13247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 13259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "Failure %d on off %llx len %lx\n", 13269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan -ret, (unsigned long long)pgaddr, 13279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_end - vma->vm_start); 13289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 13297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 13307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 13317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 133270c51da2c4f84317bb13a2b564600afdcebd686fArthur Jonesstatic unsigned ipath_poll_hdrqfull(struct ipath_portdata *pd) 133370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones{ 133470c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones unsigned pollflag = 0; 133570c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 133670c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones if ((pd->poll_type & IPATH_POLL_TYPE_OVERFLOW) && 133770c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_hdrqfull != pd->port_hdrqfull_poll) { 133870c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pollflag |= POLLIN | POLLRDNORM; 133970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_hdrqfull_poll = pd->port_hdrqfull; 134070c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones } 134170c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 134270c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones return pollflag; 134370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones} 134470c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 1345f2d042313e420002b06715675963cfab48ed2597Robert Walshstatic unsigned int ipath_poll_urgent(struct ipath_portdata *pd, 1346f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct file *fp, 1347f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct poll_table_struct *pt) 13487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 1349e35d710d0c5b74bc9833d6a3791706bd577a3724Bryan O'Sullivan unsigned pollflag = 0; 13507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 13517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 13537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 135470c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* variable access in ipath_poll_hdrqfull() needs this */ 135570c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones rmb(); 135670c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pollflag = ipath_poll_hdrqfull(pd); 13577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 135870c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones if (pd->port_urgent != pd->port_urgent_poll) { 1359f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag |= POLLIN | POLLRDNORM; 136070c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_urgent_poll = pd->port_urgent; 1361f2d042313e420002b06715675963cfab48ed2597Robert Walsh } 13627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1363f2d042313e420002b06715675963cfab48ed2597Robert Walsh if (!pollflag) { 136470c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* this saves a spin_lock/unlock in interrupt handler... */ 1365f2d042313e420002b06715675963cfab48ed2597Robert Walsh set_bit(IPATH_PORT_WAITING_URG, &pd->port_flag); 136670c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* flush waiting flag so don't miss an event... */ 136770c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones wmb(); 1368f2d042313e420002b06715675963cfab48ed2597Robert Walsh poll_wait(fp, &pd->port_wait, pt); 1369f2d042313e420002b06715675963cfab48ed2597Robert Walsh } 1370f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1371f2d042313e420002b06715675963cfab48ed2597Robert Walsh return pollflag; 1372f2d042313e420002b06715675963cfab48ed2597Robert Walsh} 1373f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1374f2d042313e420002b06715675963cfab48ed2597Robert Walshstatic unsigned int ipath_poll_next(struct ipath_portdata *pd, 1375f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct file *fp, 1376f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct poll_table_struct *pt) 1377f2d042313e420002b06715675963cfab48ed2597Robert Walsh{ 137870c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones u32 head; 137970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones u32 tail; 1380f2d042313e420002b06715675963cfab48ed2597Robert Walsh unsigned pollflag = 0; 1381f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct ipath_devdata *dd; 1382f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1383f2d042313e420002b06715675963cfab48ed2597Robert Walsh dd = pd->port_dd; 13847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 138570c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* variable access in ipath_poll_hdrqfull() needs this */ 138670c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones rmb(); 138770c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pollflag = ipath_poll_hdrqfull(pd); 138870c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 13897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan head = ipath_read_ureg32(dd, ur_rcvhdrhead, pd->port_port); 1390c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell if (pd->port_rcvhdrtail_kvaddr) 1391c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell tail = ipath_get_rcvhdrtail(pd); 1392c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell else 1393c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell tail = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); 1394f2d042313e420002b06715675963cfab48ed2597Robert Walsh 139570c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones if (head != tail) 1396f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag |= POLLIN | POLLRDNORM; 139770c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones else { 139870c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* this saves a spin_lock/unlock in interrupt handler */ 13997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan set_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag); 140070c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* flush waiting flag so we don't miss an event */ 140170c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones wmb(); 1402f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1403d8274869d742c3d8082e1428de47e54d12104928Dave Olson set_bit(pd->port_port + dd->ipath_r_intravail_shift, 1404f2d042313e420002b06715675963cfab48ed2597Robert Walsh &dd->ipath_rcvctrl); 1405f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1406f2d042313e420002b06715675963cfab48ed2597Robert Walsh ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 1407f2d042313e420002b06715675963cfab48ed2597Robert Walsh dd->ipath_rcvctrl); 1408f2d042313e420002b06715675963cfab48ed2597Robert Walsh 14099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (dd->ipath_rhdrhead_intr_off) /* arm rcv interrupt */ 1410f2d042313e420002b06715675963cfab48ed2597Robert Walsh ipath_write_ureg(dd, ur_rcvhdrhead, 1411f2d042313e420002b06715675963cfab48ed2597Robert Walsh dd->ipath_rhdrhead_intr_off | head, 1412f2d042313e420002b06715675963cfab48ed2597Robert Walsh pd->port_port); 14137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1414f2d042313e420002b06715675963cfab48ed2597Robert Walsh poll_wait(fp, &pd->port_wait, pt); 14157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 14167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1417f2d042313e420002b06715675963cfab48ed2597Robert Walsh return pollflag; 1418f2d042313e420002b06715675963cfab48ed2597Robert Walsh} 1419f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1420f2d042313e420002b06715675963cfab48ed2597Robert Walshstatic unsigned int ipath_poll(struct file *fp, 1421f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct poll_table_struct *pt) 1422f2d042313e420002b06715675963cfab48ed2597Robert Walsh{ 1423f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct ipath_portdata *pd; 1424f2d042313e420002b06715675963cfab48ed2597Robert Walsh unsigned pollflag; 1425f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1426f2d042313e420002b06715675963cfab48ed2597Robert Walsh pd = port_fp(fp); 1427f2d042313e420002b06715675963cfab48ed2597Robert Walsh if (!pd) 1428f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag = 0; 1429f2d042313e420002b06715675963cfab48ed2597Robert Walsh else if (pd->poll_type & IPATH_POLL_TYPE_URGENT) 1430f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag = ipath_poll_urgent(pd, fp, pt); 1431f2d042313e420002b06715675963cfab48ed2597Robert Walsh else 1432f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag = ipath_poll_next(pd, fp, pt); 14337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1434e35d710d0c5b74bc9833d6a3791706bd577a3724Bryan O'Sullivan return pollflag; 14357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 14367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14370df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbagestatic int ipath_supports_subports(int user_swmajor, int user_swminor) 14380df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage{ 14390df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* no subport implementation prior to software version 1.3 */ 14400df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return (user_swmajor > 1) || (user_swminor >= 3); 14410df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage} 14420df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage 14430df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbagestatic int ipath_compatible_subports(int user_swmajor, int user_swminor) 14440df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage{ 14450df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* this code is written long-hand for clarity */ 14460df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (IPATH_USER_SWMAJOR != user_swmajor) { 14470df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* no promise of compatibility if major mismatch */ 14480df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return 0; 14490df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage } 14500df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (IPATH_USER_SWMAJOR == 1) { 14510df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage switch (IPATH_USER_SWMINOR) { 14520df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage case 0: 14530df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage case 1: 14540df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage case 2: 14550df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* no subport implementation so cannot be compatible */ 14560df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return 0; 14570df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage case 3: 14580df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* 3 is only compatible with itself */ 14590df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return user_swminor == 3; 14600df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage default: 14610df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* >= 4 are compatible (or are expected to be) */ 14620df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return user_swminor >= 4; 14630df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage } 14640df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage } 14650df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* make no promises yet for future major versions */ 14660df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return 0; 14670df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage} 14680df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage 14699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int init_subports(struct ipath_devdata *dd, 14709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd, 14719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 14729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 14739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret = 0; 1474c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage unsigned num_subports; 14759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t size; 14769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 14779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 1478bacf4013530e7fc230a8aa0c6ea3c17fc2f47665Mark Debbage * If the user is requesting zero subports, 14799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * skip the subport allocation. 14809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 1481bacf4013530e7fc230a8aa0c6ea3c17fc2f47665Mark Debbage if (uinfo->spu_subport_cnt <= 0) 14829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 1483c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage 14840df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* Self-consistency check for ipath_compatible_subports() */ 14850df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (ipath_supports_subports(IPATH_USER_SWMAJOR, IPATH_USER_SWMINOR) && 14860df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage !ipath_compatible_subports(IPATH_USER_SWMAJOR, 14870df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage IPATH_USER_SWMINOR)) { 1488c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage dev_info(&dd->pcidev->dev, 14890df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage "Inconsistent ipath_compatible_subports()\n"); 14900df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage goto bail; 14910df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage } 14920df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage 14930df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* Check for subport compatibility */ 14940df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (!ipath_compatible_subports(uinfo->spu_userversion >> 16, 14950df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage uinfo->spu_userversion & 0xffff)) { 14960df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage dev_info(&dd->pcidev->dev, 14970df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage "Mismatched user version (%d.%d) and driver " 14980df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage "version (%d.%d) while port sharing. Ensure " 1499c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage "that driver and library are from the same " 1500c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage "release.\n", 15010df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage (int) (uinfo->spu_userversion >> 16), 1502c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage (int) (uinfo->spu_userversion & 0xffff), 15030df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage IPATH_USER_SWMAJOR, 1504c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage IPATH_USER_SWMINOR); 1505c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage goto bail; 1506c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } 15070a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (uinfo->spu_subport_cnt > INFINIPATH_MAX_SUBPORT) { 15089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 15099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 15109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 15119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1512c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage num_subports = uinfo->spu_subport_cnt; 1513c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->subport_uregbase = vmalloc(PAGE_SIZE * num_subports); 15149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->subport_uregbase) { 15159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENOMEM; 15169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 15179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 15189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Note: pd->port_rcvhdrq_size isn't initialized yet. */ 15199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize * 1520c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage sizeof(u32), PAGE_SIZE) * num_subports; 15219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->subport_rcvhdr_base = vmalloc(size); 15229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->subport_rcvhdr_base) { 15239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENOMEM; 15249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail_ureg; 15259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 15269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 15279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->subport_rcvegrbuf = vmalloc(pd->port_rcvegrbuf_chunks * 15289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf_size * 1529c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage num_subports); 15309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->subport_rcvegrbuf) { 15319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENOMEM; 15329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail_rhdr; 15339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 15349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 15359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_subport_cnt = uinfo->spu_subport_cnt; 15369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_subport_id = uinfo->spu_subport_id; 15379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->active_slaves = 1; 1538947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell set_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag); 1539c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage memset(pd->subport_uregbase, 0, PAGE_SIZE * num_subports); 1540c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage memset(pd->subport_rcvhdr_base, 0, size); 1541c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage memset(pd->subport_rcvegrbuf, 0, pd->port_rcvegrbuf_chunks * 1542c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvegrbuf_size * 1543c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage num_subports); 15449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 15459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 15469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail_rhdr: 15479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vfree(pd->subport_rcvhdr_base); 15489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail_ureg: 15499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vfree(pd->subport_uregbase); 15509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->subport_uregbase = NULL; 15519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 15529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 15539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 15549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 15557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int try_alloc_port(struct ipath_devdata *dd, int port, 15569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct file *fp, 15579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 15587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 15599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd; 15607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 15617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!(pd = dd->ipath_pd[port])) { 15639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan void *ptmp; 15647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd = kzalloc(sizeof(struct ipath_portdata), GFP_KERNEL); 15667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 15687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Allocate memory for use in ipath_tid_update() just once 15697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * at open, not per call. Reduces cost of expected send 15707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * setup. 15717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 15727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ptmp = kmalloc(dd->ipath_rcvtidcnt * sizeof(u16) + 15737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidcnt * sizeof(struct page **), 15747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan GFP_KERNEL); 15759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd || !ptmp) { 15767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Unable to allocate portdata " 15777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "memory, failing open\n"); 15787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 15799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(pd); 15807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kfree(ptmp); 15817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 15827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_pd[port] = pd; 15847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_port = port; 15857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_dd = dd; 15867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_tid_pg_list = ptmp; 15877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan init_waitqueue_head(&dd->ipath_pd[port]->port_wait); 15887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_cnt) { 15909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->userversion = uinfo->spu_userversion; 15919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan init_user_egr_sizes(pd); 15929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if ((ret = init_subports(dd, pd, uinfo)) != 0) 15939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 15947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] opened unit:port %u:%u\n", 15957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, dd->ipath_unit, 15967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan port); 15979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_cnt = 1; 15989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan port_fp(fp) = pd; 15999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_pid = current->pid; 16009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan strncpy(pd->port_comm, current->comm, sizeof(pd->port_comm)); 16017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_ports++; 16027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 16039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else 16049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EBUSY; 16057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 16077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 16087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 16097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic inline int usable(struct ipath_devdata *dd) 16117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 16127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return dd && 16137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (dd->ipath_flags & IPATH_PRESENT) && 16147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_kregbase && 16157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_lid && 16167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan !(dd->ipath_flags & (IPATH_LINKDOWN | IPATH_DISABLED 16177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan | IPATH_LINKUNK)); 16187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 16197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int find_free_port(int unit, struct file *fp, 16219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 16227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 16237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(unit); 16247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret, i; 16257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd) { 16277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENODEV; 16287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!usable(dd)) { 16327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENETDOWN; 16337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan for (i = 1; i < dd->ipath_cfgports; i++) { 16379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = try_alloc_port(dd, i, fp, uinfo); 16387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret != -EBUSY) 16397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 16427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 16447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 16457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 16467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int find_best_unit(struct file *fp, 16489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 16497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 16507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0, i, prefunit = -1, devmax; 16517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int maxofallports, npresent, nup; 16527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ndev; 16537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan devmax = ipath_count_units(&npresent, &nup, &maxofallports); 16557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 16577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This code is present to allow a knowledgeable person to 16587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * specify the layout of processes to processors before opening 16597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * this driver, and then we'll assign the process to the "closest" 1660525d0ca1d452ed336c1d907fb20c104467a8a47bBryan O'Sullivan * InfiniPath chip to that processor (we assume reasonable connectivity, 16617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for now). This code assumes that if affinity has been set 16627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * before this point, that at most one cpu is set; for now this 16637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * is reasonable. I check for both cpus_empty() and cpus_full(), 16647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in case some kernel variant sets none of the bits when no 16657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * affinity is set. 2.6.11 and 12 kernels have all present 16667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * cpus set. Some day we'll have to fix it up further to handle 1667525d0ca1d452ed336c1d907fb20c104467a8a47bBryan O'Sullivan * a cpu subset. This algorithm fails for two HT chips connected 16687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in tunnel fashion. Eventually this needs real topology 16697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * information. There may be some issues with dual core numbering 16707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * as well. This needs more work prior to release. 16717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 16727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cpus_empty(current->cpus_allowed) && 16737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan !cpus_full(current->cpus_allowed)) { 1674f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan int ncpus = num_online_cpus(), curcpu = -1, nset = 0; 16757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ncpus; i++) 16767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cpu_isset(i, current->cpus_allowed)) { 16777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] affinity set for " 1678f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan "cpu %d/%d\n", current->comm, 1679f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan current->pid, i, ncpus); 16807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan curcpu = i; 1681f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan nset++; 16827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1683f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan if (curcpu != -1 && nset != ncpus) { 16847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (npresent) { 16857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit = curcpu / (ncpus / npresent); 1686c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage ipath_cdbg(PROC,"%s[%u] %d chips, %d cpus, " 16877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%d cpus/chip, select unit %d\n", 16887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, 16897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan npresent, ncpus, ncpus / npresent, 16907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit); 16917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 16967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * user ports start at 1, kernel port is 0 16977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * For now, we do round-robin access across all chips 16987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 16997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (prefunit != -1) 17017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan devmax = prefunit + 1; 17027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanrecheck: 17037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 1; i < maxofallports; i++) { 17047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (ndev = prefunit != -1 ? prefunit : 0; ndev < devmax; 17057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ndev++) { 17067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(ndev); 17077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!usable(dd)) 17097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; /* can't use this unit */ 17107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (i >= dd->ipath_cfgports) 17117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 17127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Maxed out on users of this unit. Try 17137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * next. 17147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 17157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 17169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = try_alloc_port(dd, i, fp, uinfo); 17177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!ret) 17187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 17197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (npresent) { 17237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (nup == 0) { 17247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENETDOWN; 17257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No ports available (none initialized " 17267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "and ready)\n"); 17277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 17287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (prefunit > 0) { 17297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* if started above 0, retry from 0 */ 17307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, 17317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%s[%u] no ports on prefunit " 17327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%d, clear and re-check\n", 17337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, 17347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit); 17357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan devmax = ipath_count_units(NULL, NULL, 17367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan NULL); 17377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit = -1; 17387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto recheck; 17397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 17417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No ports available\n"); 17427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 17447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENXIO; 17457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No boards found\n"); 17467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 17497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 17507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 17517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int find_shared_port(struct file *fp, 17539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 17549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 17559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int devmax, ndev, i; 17569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret = 0; 17579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan devmax = ipath_count_units(NULL, NULL, NULL); 17599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan for (ndev = 0; ndev < devmax; ndev++) { 17619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(ndev); 17629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!dd) 17649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan continue; 17659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan for (i = 1; i < dd->ipath_cfgports; i++) { 17669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd = dd->ipath_pd[i]; 17679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Skip ports which are not yet open */ 17699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd || !pd->port_cnt) 17709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan continue; 17719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Skip port if it doesn't match the requested one */ 17729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (pd->port_subport_id != uinfo->spu_subport_id) 17739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan continue; 17749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Verify the sharing process matches the master */ 17759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (pd->port_subport_cnt != uinfo->spu_subport_cnt || 17769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->userversion != uinfo->spu_userversion || 17779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_cnt >= pd->port_subport_cnt) { 17789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 17799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 17809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 17819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan port_fp(fp) = pd; 17829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_fp(fp) = pd->port_cnt++; 1783755807a296f77ca7c31dc000afdfe1e5172bbf72Dave Olson pd->port_subpid[subport_fp(fp)] = current->pid; 17849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcursor_fp(fp) = 0; 17859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->active_slaves |= 1 << subport_fp(fp); 17869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(PROC, 17879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "%s[%u] %u sharing %s[%u] unit:port %u:%u\n", 17889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan current->comm, current->pid, 17899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_fp(fp), 17909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_comm, pd->port_pid, 17919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_unit, pd->port_port); 17929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = 1; 17939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 17949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 17959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 17969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivandone: 17989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 17999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 18009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_open(struct inode *in, struct file *fp) 18027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 1803c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan /* The real work is performed later in ipath_assign_port() */ 18049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan fp->private_data = kzalloc(sizeof(struct ipath_filedata), GFP_KERNEL); 18059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return fp->private_data ? 0 : -ENOMEM; 18069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 18079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1808c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan/* Get port early, so can set affinity prior to memory allocation */ 1809c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivanstatic int ipath_assign_port(struct file *fp, 18109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 18119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 18129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret; 18139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int i_minor; 18140df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage unsigned swmajor, swminor; 18159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Check to be sure we haven't already initialized this file */ 18179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (port_fp(fp)) { 18189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 18199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 18209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* for now, if major version is different, bail */ 18230df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage swmajor = uinfo->spu_userversion >> 16; 18240df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (swmajor != IPATH_USER_SWMAJOR) { 18259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_dbg("User major version %d not same as driver " 18269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "major %d\n", uinfo->spu_userversion >> 16, 18279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan IPATH_USER_SWMAJOR); 18289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENODEV; 18299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 18309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan swminor = uinfo->spu_userversion & 0xffff; 18339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (swminor != IPATH_USER_SWMINOR) 18349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_dbg("User minor version %d not same as driver " 18359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "minor %d\n", swminor, IPATH_USER_SWMINOR); 18367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_lock(&ipath_mutex); 18387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18390df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (ipath_compatible_subports(swmajor, swminor) && 18400df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage uinfo->spu_subport_cnt && 18419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (ret = find_shared_port(fp, uinfo))) { 18429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan mutex_unlock(&ipath_mutex); 18439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret > 0) 18449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = 0; 18459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 18469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18481cfd6e648b5ea21b0d48bf6f18b129e4576557d5Josef Sipek i_minor = iminor(fp->f_path.dentry->d_inode) - IPATH_USER_MINOR_BASE; 18497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "open on dev %lx (minor %d)\n", 18501cfd6e648b5ea21b0d48bf6f18b129e4576557d5Josef Sipek (long)fp->f_path.dentry->d_inode->i_rdev, i_minor); 18517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (i_minor) 18539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = find_free_port(i_minor - 1, fp, uinfo); 18547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else 18559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = find_best_unit(fp, uinfo); 18567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_unlock(&ipath_mutex); 18589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1859c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivandone: 1860c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan return ret; 1861c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan} 1862c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan 1863c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan 1864c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivanstatic int ipath_do_user_init(struct file *fp, 1865c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan const struct ipath_user_info *uinfo) 1866c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan{ 1867c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan int ret; 1868947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell struct ipath_portdata *pd = port_fp(fp); 1869c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan struct ipath_devdata *dd; 1870c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan u32 head32; 18719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1872947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell /* Subports don't need to initialize anything since master did it. */ 1873947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell if (subport_fp(fp)) { 1874947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell ret = wait_event_interruptible(pd->port_wait, 1875947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell !test_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag)); 1876947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell goto done; 1877947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell } 1878947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell 18799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd = pd->port_dd; 18809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (uinfo->spu_rcvhdrsize) { 18829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_setrcvhdrsize(dd, uinfo->spu_rcvhdrsize); 18839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret) 18849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 18859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* for now we do nothing with rcvhdrcnt: uinfo->spu_rcvhdrcnt */ 18889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* for right now, kernel piobufs are at end, so port 1 is at 0 */ 18909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_piobufs = dd->ipath_piobufbase + 18919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_pbufsport * (pd->port_port - 1) * dd->ipath_palign; 18929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(VERBOSE, "Set base of piobufs for port %u to 0x%x\n", 18939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, pd->port_piobufs); 18949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 18969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Now allocate the rcvhdr Q and eager TIDs; skip the TID 18979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * array for time being. If pd->port_port > chip-supported, 18989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * we need to do extra stuff here to handle by handling overflow 18999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * through port 0, someday 19009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 19019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_create_rcvhdrq(dd, pd); 19029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!ret) 19039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_create_user_egr(pd); 19049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret) 19059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 19069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 19079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 19089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * set the eager head register for this port to the current values 19099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * of the tail pointers, since we don't know if they were 19109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * updated on last use of the port. 19119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 19129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan head32 = ipath_read_ureg32(dd, ur_rcvegrindextail, pd->port_port); 19139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_write_ureg(dd, ur_rcvegrindexhead, head32, pd->port_port); 1914755807a296f77ca7c31dc000afdfe1e5172bbf72Dave Olson pd->port_lastrcvhdrqtail = -1; 19159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(VERBOSE, "Wrote port%d egrhead %x from tail regs\n", 19169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, head32); 19179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_tidcursor = 0; /* start at beginning after open */ 191870c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 191970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* initialize poll variables... */ 192070c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_urgent = 0; 192170c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_urgent_poll = 0; 192270c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_hdrqfull_poll = pd->port_hdrqfull; 192370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 19249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 19259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * now enable the port; the tail registers will be written to memory 19269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * by the chip as soon as it sees the write to 19279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * dd->ipath_kregs->kr_rcvctrl. The update only happens on 19289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * transition from 0 to 1, so clear it first, then set it as part of 19299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * enabling the port. This will (very briefly) affect any other 19309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * open ports, but it shouldn't be long enough to be an issue. 19319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * We explictly set the in-memory copy to 0 beforehand, so we don't 19329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * have to wait to be sure the DMA update has happened. 19339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 1934c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell if (pd->port_rcvhdrtail_kvaddr) 1935c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell ipath_clear_rcvhdrtail(pd); 1936d8274869d742c3d8082e1428de47e54d12104928Dave Olson set_bit(dd->ipath_r_portenable_shift + pd->port_port, 19379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan &dd->ipath_rcvctrl); 19389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 1939d8274869d742c3d8082e1428de47e54d12104928Dave Olson dd->ipath_rcvctrl & 1940d8274869d742c3d8082e1428de47e54d12104928Dave Olson ~(1ULL << dd->ipath_r_tailupd_shift)); 19419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 19429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_rcvctrl); 1943947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell /* Notify any waiting slaves */ 1944947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell if (pd->port_subport_cnt) { 1945947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell clear_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag); 1946947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell wake_up(&pd->port_wait); 1947947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell } 19489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivandone: 19497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 19507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 19517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 19527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 19537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * unlock_exptid - unlock any expected TID entries port still had in use 19547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: port 19557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 19567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We don't actually update the chip here, because we do a bulk update 19577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * below, using ipath_f_clear_tids. 19587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 19597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void unlock_expected_tids(struct ipath_portdata *pd) 19607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 19617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 19627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int port_tidbase = pd->port_port * dd->ipath_rcvtidcnt; 19637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, cnt = 0, maxtid = port_tidbase + dd->ipath_rcvtidcnt; 19647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 19657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port %u unlocking any locked expTID pages\n", 19667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port); 19677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = port_tidbase; i < maxtid; i++) { 19687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow[i]) 19697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 19707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 19711fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pci_unmap_page(dd->pcidev, dd->ipath_physshadow[i], 19721fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PAGE_SIZE, PCI_DMA_FROMDEVICE); 19737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_release_user_pages_on_close(&dd->ipath_pageshadow[i], 19747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1); 19757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[i] = NULL; 19767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt++; 19777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 19787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 19797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cnt) 19807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port %u locked %u expTID entries\n", 19817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, cnt); 19827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 19837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ipath_stats.sps_pagelocks || ipath_stats.sps_pageunlocks) 19847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "%llu pages locked, %llu unlocked\n", 19857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) ipath_stats.sps_pagelocks, 19867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) 19877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks); 19887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 19897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 19907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_close(struct inode *in, struct file *fp) 19917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 19927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 19939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_filedata *fd; 19947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 19957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 19967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned port; 19977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 19987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "close on dev %lx, private data %p\n", 19997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (long)in->i_rdev, fp->private_data); 20007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_lock(&ipath_mutex); 20027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan fd = (struct ipath_filedata *) fp->private_data; 20047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan fp->private_data = NULL; 20059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd = fd->pd; 20069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd) { 20079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan mutex_unlock(&ipath_mutex); 20089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 20099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 20109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (--pd->port_cnt) { 20119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 20129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * XXX If the master closes the port before the slave(s), 20139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * revoke the mmap for the eager receive queue so 20149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * the slave(s) don't wait for receive data forever. 20159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 20169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->active_slaves &= ~(1 << fd->subport); 2017755807a296f77ca7c31dc000afdfe1e5172bbf72Dave Olson pd->port_subpid[fd->subport] = 0; 20189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan mutex_unlock(&ipath_mutex); 20199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 20209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 20219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan port = pd->port_port; 20227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 20237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_hdrqfull) { 20257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] had %u rcvhdrqfull errors " 20267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "during run\n", pd->port_comm, pd->port_pid, 20277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_hdrqfull); 20287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_hdrqfull = 0; 20297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 20307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_rcvwait_to || pd->port_piowait_to 20327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan || pd->port_rcvnowait || pd->port_pionowait) { 20337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "port%u, %u rcv, %u pio wait timeo; " 20347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%u rcv %u, pio already\n", 20357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, pd->port_rcvwait_to, 20367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_piowait_to, pd->port_rcvnowait, 20377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pionowait); 20387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvwait_to = pd->port_piowait_to = 20397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvnowait = pd->port_pionowait = 0; 20407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 20417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_flag) { 20427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u port_flag still set to 0x%lx\n", 20437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, pd->port_flag); 20447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_flag = 0; 20457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 20467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_kregbase) { 204835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan int i; 204970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* atomically clear receive enable port and intr avail. */ 2050d8274869d742c3d8082e1428de47e54d12104928Dave Olson clear_bit(dd->ipath_r_portenable_shift + port, 205135783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan &dd->ipath_rcvctrl); 2052d8274869d742c3d8082e1428de47e54d12104928Dave Olson clear_bit(pd->port_port + dd->ipath_r_intravail_shift, 205370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones &dd->ipath_rcvctrl); 205435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg( dd, dd->ipath_kregs->kr_rcvctrl, 205535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_rcvctrl); 205635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan /* and read back from chip to be sure that nothing 205735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * else is in flight when we do the rest */ 205835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan (void)ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); 20597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* clean up the pkeys for this port user */ 20617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_clean_part_key(pd, dd); 206235783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan /* 206335783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * be paranoid, and never write 0's to these, just use an 206435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * unused part of the port 0 tail page. Of course, 206535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * rcvhdraddr points to a large chunk of memory, so this 206635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * could still trash things, but at least it won't trash 206735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * page 0, and by disabling the port, it should stop "soon", 206835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * even if a packet or two is in already in flight after we 206935783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * disabled the port. 207035783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan */ 207135783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg_port(dd, 207235783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_kregs->kr_rcvhdrtailaddr, port, 207335783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_dummy_hdrq_phys); 207435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdraddr, 207535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan pd->port_port, dd->ipath_dummy_hdrq_phys); 207635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan 207735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan i = dd->ipath_pbufsport * (port - 1); 207835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_disarm_piobufs(dd, i, dd->ipath_pbufsport); 207935783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan 20801fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_f_clear_tids(dd, pd->port_port); 20811fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan 208235783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan if (dd->ipath_pageshadow) 208335783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan unlock_expected_tids(pd); 208435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_stats.sps_ports--; 208535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] closed port %u:%u\n", 208635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan pd->port_comm, pd->port_pid, 208735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_unit, port); 20887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 20897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pid = 0; 2091f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dd->ipath_pd[pd->port_port] = NULL; /* before releasing mutex */ 20927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_unlock(&ipath_mutex); 2093f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ipath_free_pddata(dd, pd); /* after releasing the mutex */ 20947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 20969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(fd); 20977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 20987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 20997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_port_info(struct ipath_portdata *pd, u16 subport, 21017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_port_info __user *uinfo) 21027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 21037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_port_info info; 21047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int nup; 21057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 21069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t sz; 21077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void) ipath_count_units(NULL, &nup, NULL); 21097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.num_active = nup; 21107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.unit = pd->port_dd->ipath_unit; 21117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.port = pd->port_port; 21129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan info.subport = subport; 21139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Don't return new fields if old library opened the port. */ 21140df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (ipath_supports_subports(pd->userversion >> 16, 21150df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage pd->userversion & 0xffff)) { 21169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Number of user ports available for this device. */ 21179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan info.num_ports = pd->port_dd->ipath_cfgports - 1; 21189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan info.num_subports = pd->port_subport_cnt; 21199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan sz = sizeof(info); 21209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else 21219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan sz = sizeof(info) - 2 * sizeof(u16); 21227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (copy_to_user(uinfo, &info, sz)) { 21247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 21257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 21267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 21287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 21307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 21317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 21327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_get_slave_info(struct ipath_portdata *pd, 21349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan void __user *slave_mask_addr) 21359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 21369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret = 0; 21379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 21389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (copy_to_user(slave_mask_addr, &pd->active_slaves, sizeof(u32))) 21399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EFAULT; 21409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 21419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 21429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 2143569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jonesstatic int ipath_force_pio_avail_update(struct ipath_devdata *dd) 2144569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones{ 2145e342c119172f87f2d812bccfd0283f62e1bc1c2aJohn Gregor unsigned long flags; 2146569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones 2147e342c119172f87f2d812bccfd0283f62e1bc1c2aJohn Gregor spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); 2148e342c119172f87f2d812bccfd0283f62e1bc1c2aJohn Gregor ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, 2149e342c119172f87f2d812bccfd0283f62e1bc1c2aJohn Gregor dd->ipath_sendctrl & ~INFINIPATH_S_PIOBUFAVAILUPD); 2150e342c119172f87f2d812bccfd0283f62e1bc1c2aJohn Gregor ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); 2151569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, dd->ipath_sendctrl); 2152e342c119172f87f2d812bccfd0283f62e1bc1c2aJohn Gregor ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); 2153e342c119172f87f2d812bccfd0283f62e1bc1c2aJohn Gregor spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); 2154569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones 2155569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones return 0; 2156569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones} 2157569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones 21587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic ssize_t ipath_write(struct file *fp, const char __user *data, 21597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t count, loff_t *off) 21607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 21617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_cmd __user *ucmd; 21627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 21637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const void __user *src; 21647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t consumed, copy; 21657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_cmd cmd; 21667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ssize_t ret = 0; 21677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan void *dest; 21687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (count < sizeof(cmd.type)) { 21707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 21717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 21727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ucmd = (const struct ipath_cmd __user *) data; 21757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_from_user(&cmd.type, &ucmd->type, sizeof(cmd.type))) { 21777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 21787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 21797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan consumed = sizeof(cmd.type); 21827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan switch (cmd.type) { 2184c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case IPATH_CMD_ASSIGN_PORT: 2185c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case __IPATH_CMD_USER_INIT: 21867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_USER_INIT: 21877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.user_info); 21887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.user_info; 21897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.user_info; 21907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 21917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_RECV_CTRL: 21927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.recv_ctrl); 21937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.recv_ctrl; 21947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.recv_ctrl; 21957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 21967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_PORT_INFO: 21977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.port_info); 21987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.port_info; 21997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.port_info; 22007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_UPDATE: 22027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_FREE: 22037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.tid_info); 22047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.tid_info; 22057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.tid_info; 22067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_SET_PART_KEY: 22087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.part_key); 22097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.part_key; 22107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.part_key; 22117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 2212c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage case __IPATH_CMD_SLAVE_INFO: 22139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan copy = sizeof(cmd.cmd.slave_mask_addr); 22149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dest = &cmd.cmd.slave_mask_addr; 22159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan src = &ucmd->cmd.slave_mask_addr; 22169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan break; 2217569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones case IPATH_CMD_PIOAVAILUPD: // force an update of PIOAvail reg 2218569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones copy = 0; 2219569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones src = NULL; 2220569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones dest = NULL; 2221569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones break; 2222f2d042313e420002b06715675963cfab48ed2597Robert Walsh case IPATH_CMD_POLL_TYPE: 2223f2d042313e420002b06715675963cfab48ed2597Robert Walsh copy = sizeof(cmd.cmd.poll_type); 2224f2d042313e420002b06715675963cfab48ed2597Robert Walsh dest = &cmd.cmd.poll_type; 2225f2d042313e420002b06715675963cfab48ed2597Robert Walsh src = &ucmd->cmd.poll_type; 2226f2d042313e420002b06715675963cfab48ed2597Robert Walsh break; 22277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan default: 22287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 22297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 22307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 22317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2232569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones if (copy) { 2233569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones if ((count - consumed) < copy) { 2234569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones ret = -EINVAL; 2235569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones goto bail; 2236569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones } 22377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2238569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones if (copy_from_user(dest, src, copy)) { 2239569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones ret = -EFAULT; 2240569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones goto bail; 2241569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones } 2242569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones 2243569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones consumed += copy; 22447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 22457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 2247c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan if (!pd && cmd.type != __IPATH_CMD_USER_INIT && 2248c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan cmd.type != IPATH_CMD_ASSIGN_PORT) { 22499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 22509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 22519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 22527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan switch (cmd.type) { 2254c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case IPATH_CMD_ASSIGN_PORT: 2255c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan ret = ipath_assign_port(fp, &cmd.cmd.user_info); 2256c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan if (ret) 2257c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan goto bail; 2258c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan break; 2259c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case __IPATH_CMD_USER_INIT: 2260c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan /* backwards compatibility, get port first */ 2261c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan ret = ipath_assign_port(fp, &cmd.cmd.user_info); 2262c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan if (ret) 2263c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan goto bail; 2264c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan /* and fall through to current version. */ 22657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_USER_INIT: 22669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_do_user_init(fp, &cmd.cmd.user_info); 22679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret) 22687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 22697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_get_base_info( 22709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan fp, (void __user *) (unsigned long) 22717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cmd.cmd.user_info.spu_base_info, 22727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cmd.cmd.user_info.spu_base_info_size); 22737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_RECV_CTRL: 22759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_manage_rcvq(pd, subport_fp(fp), cmd.cmd.recv_ctrl); 22767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_PORT_INFO: 22789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_port_info(pd, subport_fp(fp), 22797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (struct ipath_port_info __user *) 22807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) cmd.cmd.port_info); 22817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_UPDATE: 22839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_tid_update(pd, fp, &cmd.cmd.tid_info); 22847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_FREE: 22869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_tid_free(pd, subport_fp(fp), &cmd.cmd.tid_info); 22877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_SET_PART_KEY: 22897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_set_part_key(pd, cmd.cmd.part_key); 22907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 2291c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage case __IPATH_CMD_SLAVE_INFO: 22929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_get_slave_info(pd, 22939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (void __user *) (unsigned long) 22949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan cmd.cmd.slave_mask_addr); 22959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan break; 2296569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones case IPATH_CMD_PIOAVAILUPD: 2297569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones ret = ipath_force_pio_avail_update(pd->port_dd); 2298569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones break; 2299f2d042313e420002b06715675963cfab48ed2597Robert Walsh case IPATH_CMD_POLL_TYPE: 2300f2d042313e420002b06715675963cfab48ed2597Robert Walsh pd->poll_type = cmd.cmd.poll_type; 2301f2d042313e420002b06715675963cfab48ed2597Robert Walsh break; 23027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 23037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret >= 0) 23057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = consumed; 23067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 23087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 23097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 23107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct class *ipath_class; 23127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23132b8693c0617e972fc0b2fd1ebf8de97e15b656c3Arjan van de Venstatic int init_cdev(int minor, char *name, const struct file_operations *fops, 23147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct cdev **cdevp, struct class_device **class_devp) 23157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 23167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const dev_t dev = MKDEV(IPATH_MAJOR, minor); 23177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct cdev *cdev = NULL; 23187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device *class_dev = NULL; 23197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 23207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev = cdev_alloc(); 23227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cdev) { 23237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME 23247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ": Could not allocate cdev for minor %d, %s\n", 23257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name); 23267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 23277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 23287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 23297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev->owner = THIS_MODULE; 23317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev->ops = fops; 23327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kobject_set_name(&cdev->kobj, name); 23337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = cdev_add(cdev, dev, 1); 23357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 23367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME 23377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ": Could not add cdev for minor %d, %s (err %d)\n", 23387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name, -ret); 23397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto err_cdev; 23407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 23417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan class_dev = class_device_create(ipath_class, NULL, dev, NULL, name); 23437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (IS_ERR(class_dev)) { 23457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = PTR_ERR(class_dev); 23467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not create " 23477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "class_dev for minor %d, %s (err %d)\n", 23487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name, -ret); 23497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto err_cdev; 23507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 23517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 23537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanerr_cdev: 23557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev_del(cdev); 23567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev = NULL; 23577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 23597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret >= 0) { 23607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = cdev; 23617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *class_devp = class_dev; 23627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 23637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = NULL; 23647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *class_devp = NULL; 23657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 23667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 23687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 23697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23702b8693c0617e972fc0b2fd1ebf8de97e15b656c3Arjan van de Venint ipath_cdev_init(int minor, char *name, const struct file_operations *fops, 23717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct cdev **cdevp, struct class_device **class_devp) 23727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 23737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return init_cdev(minor, name, fops, cdevp, class_devp); 23747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 23757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void cleanup_cdev(struct cdev **cdevp, 23777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device **class_devp) 23787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 23797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device *class_dev = *class_devp; 23807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (class_dev) { 23827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan class_device_unregister(class_dev); 23837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *class_devp = NULL; 23847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 23857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (*cdevp) { 23877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev_del(*cdevp); 23887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = NULL; 23897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 23907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 23917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanvoid ipath_cdev_cleanup(struct cdev **cdevp, 23937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device **class_devp) 23947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 23957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cleanup_cdev(cdevp, class_devp); 23967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 23977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct cdev *wildcard_cdev; 23997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct class_device *wildcard_class_dev; 24007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic const dev_t dev = MKDEV(IPATH_MAJOR, 0); 24027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int user_init(void) 24047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 24057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 24067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = register_chrdev_region(dev, IPATH_NMINORS, IPATH_DRV_NAME); 24087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 24097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not register " 24107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "chrdev region (err %d)\n", -ret); 24117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 24127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_class = class_create(THIS_MODULE, IPATH_DRV_NAME); 24157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (IS_ERR(ipath_class)) { 24177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = PTR_ERR(ipath_class); 24187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not create " 24197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "device class (err %d)\n", -ret); 24207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 24217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 24247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 24257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unregister_chrdev_region(dev, IPATH_NMINORS); 24267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 24277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 24287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 24297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void user_cleanup(void) 24317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 24327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ipath_class) { 24337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan class_destroy(ipath_class); 24347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_class = NULL; 24357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unregister_chrdev_region(dev, IPATH_NMINORS); 24387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 24397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic atomic_t user_count = ATOMIC_INIT(0); 24417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic atomic_t user_setup = ATOMIC_INIT(0); 24427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanint ipath_user_add(struct ipath_devdata *dd) 24447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 24457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan char name[10]; 24467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 24477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_inc_return(&user_count) == 1) { 24497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = user_init(); 24507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 24517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Unable to set up user support: " 24527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "error %d\n", -ret); 24537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 24547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = init_cdev(0, "ipath", &ipath_file_ops, &wildcard_cdev, 24567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &wildcard_class_dev); 24577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 24587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Could not create wildcard " 24597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "minor: error %d\n", -ret); 24600fd41363e0785247b7c19127318abc8b5eacc86bBryan O'Sullivan goto bail_user; 24617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_set(&user_setup, 1); 24647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan snprintf(name, sizeof(name), "ipath%d", dd->ipath_unit); 24677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = init_cdev(dd->ipath_unit + 1, name, &ipath_file_ops, 2469a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan &dd->user_cdev, &dd->user_class_dev); 24707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 24717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Could not create user minor %d, %s\n", 24727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_unit + 1, name); 24737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 24757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24760fd41363e0785247b7c19127318abc8b5eacc86bBryan O'Sullivanbail_user: 24777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan user_cleanup(); 24787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 24797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 24807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 24817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2482a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivanvoid ipath_user_remove(struct ipath_devdata *dd) 24837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 2484a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan cleanup_cdev(&dd->user_cdev, &dd->user_class_dev); 24857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_dec_return(&user_count) == 0) { 24877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_read(&user_setup) == 0) 24887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 24897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cleanup_cdev(&wildcard_cdev, &wildcard_class_dev); 24917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan user_cleanup(); 24927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_set(&user_setup, 0); 24947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 24967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return; 24977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 2498