ipath_file_ops.c revision 6038f373a3dc1f1c26496e60b6c40b164716f07e
17f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/* 2e7eacd36865ae0707f5efae8e4dda421ffcd1b66Ralph Campbell * Copyright (c) 2006, 2007, 2008 QLogic Corporation. All rights reserved. 37f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved. 47f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 57f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This software is available to you under a choice of one of two 67f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * licenses. You may choose to be licensed under the terms of the GNU 77f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * General Public License (GPL) Version 2, available from the file 87f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * COPYING in the main directory of this source tree, or the 97f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * OpenIB.org BSD license below: 107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Redistribution and use in source and binary forms, with or 127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * without modification, are permitted provided that the following 137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * conditions are met: 147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * - Redistributions of source code must retain the above 167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * copyright notice, this list of conditions and the following 177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * disclaimer. 187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * - Redistributions in binary form must reproduce the above 207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * copyright notice, this list of conditions and the following 217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * disclaimer in the documentation and/or other materials 227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * provided with the distribution. 237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * SOFTWARE. 327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/pci.h> 357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/poll.h> 367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/cdev.h> 377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/swap.h> 387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/vmalloc.h> 395a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 40124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson#include <linux/highmem.h> 41124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson#include <linux/io.h> 42124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson#include <linux/jiffies.h> 43f2b9857eee17797541b845782ade4d7a9d50f843Jonathan Corbet#include <linux/smp_lock.h> 447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <asm/pgtable.h> 457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include "ipath_kernel.h" 4727b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan#include "ipath_common.h" 48124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson#include "ipath_user_sdma.h" 497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_open(struct inode *, struct file *); 517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_close(struct inode *, struct file *); 527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic ssize_t ipath_write(struct file *, const char __user *, size_t, 537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan loff_t *); 54124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olsonstatic ssize_t ipath_writev(struct kiocb *, const struct iovec *, 55124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson unsigned long , loff_t); 567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic unsigned int ipath_poll(struct file *, struct poll_table_struct *); 577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_mmap(struct file *, struct vm_area_struct *); 587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 592b8693c0617e972fc0b2fd1ebf8de97e15b656c3Arjan van de Venstatic const struct file_operations ipath_file_ops = { 607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .owner = THIS_MODULE, 617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .write = ipath_write, 62124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson .aio_write = ipath_writev, 637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .open = ipath_open, 647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .release = ipath_close, 657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .poll = ipath_poll, 666038f373a3dc1f1c26496e60b6c40b164716f07eArnd Bergmann .mmap = ipath_mmap, 676038f373a3dc1f1c26496e60b6c40b164716f07eArnd Bergmann .llseek = noop_llseek, 687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan}; 697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 700a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell/* 710a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell * Convert kernel virtual addresses to physical addresses so they don't 720a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell * potentially conflict with the chip addresses used as mmap offsets. 730a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell * It doesn't really matter what mmap offset we use as long as we can 740a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell * interpret it correctly. 750a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell */ 760a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbellstatic u64 cvt_kvaddr(void *p) 770a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell{ 780a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell struct page *page; 790a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell u64 paddr = 0; 800a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell 810a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell page = vmalloc_to_page(p); 820a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (page) 830a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell paddr = page_to_pfn(page) << PAGE_SHIFT; 840a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell 850a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell return paddr; 860a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell} 870a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell 889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_get_base_info(struct file *fp, 897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan void __user *ubase, size_t ubase_size) 907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd = port_fp(fp); 927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_base_info *kinfo = NULL; 947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned subport_cnt; 969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int shared, master; 979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t sz; 989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_cnt = pd->port_subport_cnt; 1009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!subport_cnt) { 1019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan shared = 0; 1029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan master = 0; 1039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_cnt = 1; 1049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 1059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan shared = 1; 1069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan master = !subport_fp(fp); 1079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 1087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan sz = sizeof(*kinfo); 1109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* If port sharing is not requested, allow the old size structure */ 1119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!shared) 112c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage sz -= 7 * sizeof(u64); 1139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ubase_size < sz) { 1147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, 1159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "Base size %zu, need %zu (version mismatch?)\n", 1169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ubase_size, sz); 1177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 1187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 1197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo = kzalloc(sizeof(*kinfo), GFP_KERNEL); 1227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (kinfo == NULL) { 1237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 1247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 1257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = dd->ipath_f_get_base_info(pd, kinfo); 1287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 1297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 1307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdr_cnt = dd->ipath_rcvhdrcnt; 1327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdrent_size = dd->ipath_rcvhdrentsize; 1337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_tidegrcnt = dd->ipath_rcvegrcnt; 1347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbufsize = dd->ipath_rcvegrbufsize; 1357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * have to mmap whole thing 1377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbuftotlen = 1397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size; 1407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrperchunk = pd->port_rcvegrbufs_perchunk; 1417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrchunksize = kinfo->spi_rcv_egrbuftotlen / 1427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_chunks; 1439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_tidcnt = dd->ipath_rcvtidcnt / subport_cnt; 1449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (master) 1459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_tidcnt += dd->ipath_rcvtidcnt % subport_cnt; 1467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for this use, may be ipath_cfgports summed over all chips that 1487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * are are configured and present 1497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_nports = dd->ipath_cfgports; 1517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* unit (chip/board) our port is on */ 1527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_unit = dd->ipath_unit; 1537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for now, only a single page */ 1547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_tid_maxsize = PAGE_SIZE; 1557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Doing this per port, and based on the skip value, etc. This has 1587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * to be the actual buffer size, since the protocol code treats it 1597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * as an array. 1607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 1617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * These have to be set to user addresses in the user code via mmap. 1627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * These values are used on return to user code for the mmap target 1637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * addresses only. For 32 bit, same 44 bit address problem, so use 1647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the physical address, not virtual. Before 2.6.11, using the 1657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * page_address() macro worked, but in 2.6.11, even that returns the 1667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * full 64 bit address (upper bits all 1's). So far, using the 1677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * physical addresses (or chip offsets, for chip mapping) works, but 1689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * no doubt some future kernel release will change that, and we'll be 1699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * on to yet another method of dealing with this. 1707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdr_base = (u64) pd->port_rcvhdrq_phys; 1729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_rcvhdr_tailaddr = (u64) pd->port_rcvhdrqtailaddr_phys; 1737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbufs = (u64) pd->port_rcvegr_phys; 1747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_pioavailaddr = (u64) dd->ipath_pioavailregs_phys; 1757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_status = (u64) kinfo->spi_pioavailaddr + 1767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) dd->ipath_statusp - 1777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) dd->ipath_pioavailregs_dma; 1789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!shared) { 179e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson kinfo->spi_piocnt = pd->port_piocnt; 1809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piobufbase = (u64) pd->port_piobufs; 1819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->__spi_uregbase = (u64) dd->ipath_uregbase + 182a18e26ae442001de62f6b84a923e8613347dc35fRalph Campbell dd->ipath_ureg_align * pd->port_port; 1839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (master) { 184e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson kinfo->spi_piocnt = (pd->port_piocnt / subport_cnt) + 185e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson (pd->port_piocnt % subport_cnt); 1869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Master's PIO buffers are after all the slave's */ 1879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piobufbase = (u64) pd->port_piobufs + 1889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign * 189e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson (pd->port_piocnt - kinfo->spi_piocnt); 1909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 1919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned slave = subport_fp(fp) - 1; 1927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 193e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson kinfo->spi_piocnt = pd->port_piocnt / subport_cnt; 1949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piobufbase = (u64) pd->port_piobufs + 1959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign * kinfo->spi_piocnt * slave; 196c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } 1971d7c2e529fb6d4143d294ade7d99e29cb6b3775fDave Olson 198c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage if (shared) { 199c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port_uregbase = (u64) dd->ipath_uregbase + 200a18e26ae442001de62f6b84a923e8613347dc35fRalph Campbell dd->ipath_ureg_align * pd->port_port; 201c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port_rcvegrbuf = kinfo->spi_rcv_egrbufs; 202c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port_rcvhdr_base = kinfo->spi_rcvhdr_base; 203c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port_rcvhdr_tailaddr = kinfo->spi_rcvhdr_tailaddr; 204c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage 2050a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell kinfo->__spi_uregbase = cvt_kvaddr(pd->subport_uregbase + 206c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage PAGE_SIZE * subport_fp(fp)); 2079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 2080a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell kinfo->spi_rcvhdr_base = cvt_kvaddr(pd->subport_rcvhdr_base + 209c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvhdrq_size * subport_fp(fp)); 210947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell kinfo->spi_rcvhdr_tailaddr = 0; 2110a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell kinfo->spi_rcv_egrbufs = cvt_kvaddr(pd->subport_rcvegrbuf + 212c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size * 213c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage subport_fp(fp)); 214c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage 215c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_subport_uregbase = 216c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage cvt_kvaddr(pd->subport_uregbase); 217c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_subport_rcvegrbuf = 218c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage cvt_kvaddr(pd->subport_rcvegrbuf); 219c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_subport_rcvhdr_base = 220c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage cvt_kvaddr(pd->subport_rcvhdr_base); 221c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage ipath_cdbg(PROC, "port %u flags %x %llx %llx %llx\n", 222c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage kinfo->spi_port, kinfo->spi_runtime_flags, 223c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage (unsigned long long) kinfo->spi_subport_uregbase, 224c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage (unsigned long long) kinfo->spi_subport_rcvegrbuf, 225c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage (unsigned long long) kinfo->spi_subport_rcvhdr_base); 2269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 2279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 2281bf7724e093cf3071d943d53bfa4de8b8e50426bDave Olson /* 2291bf7724e093cf3071d943d53bfa4de8b8e50426bDave Olson * All user buffers are 2KB buffers. If we ever support 2301bf7724e093cf3071d943d53bfa4de8b8e50426bDave Olson * giving 4KB buffers to user processes, this will need some 2311bf7724e093cf3071d943d53bfa4de8b8e50426bDave Olson * work. 2321bf7724e093cf3071d943d53bfa4de8b8e50426bDave Olson */ 2331bf7724e093cf3071d943d53bfa4de8b8e50426bDave Olson kinfo->spi_pioindex = (kinfo->spi_piobufbase - 2341bf7724e093cf3071d943d53bfa4de8b8e50426bDave Olson (dd->ipath_piobufbase & 0xffffffff)) / dd->ipath_palign; 2357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_pioalign = dd->ipath_palign; 2367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_qpair = IPATH_KD_QP; 238826d801009fb3c82832f2d92149446cce354bf61Dave Olson /* 239826d801009fb3c82832f2d92149446cce354bf61Dave Olson * user mode PIO buffers are always 2KB, even when 4KB can 240826d801009fb3c82832f2d92149446cce354bf61Dave Olson * be received, and sent via the kernel; this is ibmaxlen 241826d801009fb3c82832f2d92149446cce354bf61Dave Olson * for 2K MTU. 242826d801009fb3c82832f2d92149446cce354bf61Dave Olson */ 243826d801009fb3c82832f2d92149446cce354bf61Dave Olson kinfo->spi_piosize = dd->ipath_piosize2k - 2 * sizeof(u32); 2447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_mtu = dd->ipath_ibmaxlen; /* maxlen, not ibmtu */ 2457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_port = pd->port_port; 2469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_subport = subport_fp(fp); 247eaf6733bc176742fb08def2269441684e963c275Bryan O'Sullivan kinfo->spi_sw_version = IPATH_KERN_SWVERSION; 2487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_hw_version = dd->ipath_revision; 2497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (master) { 2519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_runtime_flags |= IPATH_RUNTIME_MASTER; 2529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 2539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 254c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage sz = (ubase_size < sizeof(*kinfo)) ? ubase_size : sizeof(*kinfo); 255c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage if (copy_to_user(ubase, kinfo, sz)) 2567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 2577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 2597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kfree(kinfo); 2607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 2617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 2627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 2647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_tid_update - update a port TID 2657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 2669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * @fp: the ipath device file 2677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @ti: the TID information 2687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * The new implementation as of Oct 2004 is that the driver assigns 2707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the tid and returns it to the caller. To make it easier to 2717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * catch bugs, and to reduce search time, we keep a cursor for 2727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * each port, walking the shadow tid array to find one that's not 2737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in use. 2747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * For now, if we can't allocate the full list, we fail, although 2767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in the long run, we'll allocate as many as we can, and the 2777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * caller will deal with that by trying the remaining pages later. 2787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * That means that when we fail, we have to mark the tids as not in 2797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * use again, in our shadow copy. 2807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * It's up to the caller to free the tids when they are done. 2827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We'll unlock the pages as they free them. 2837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Also, right now we are locking one page at a time, but since 2857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the intended use of this routine is for a single group of 2867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * virtually contiguous pages, that should change to improve 2877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * performance. 2887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 2899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_tid_update(struct ipath_portdata *pd, struct file *fp, 2907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_tid_info *ti) 2917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 2927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0, ntids; 2939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan u32 tid, porttid, cnt, i, tidcnt, tidoff; 2947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u16 *tidlist; 2957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 2967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 physaddr; 2977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long vaddr; 2987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 __iomem *tidbase; 2997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long tidmap[8]; 3007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct page **pagep = NULL; 3019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned subport = subport_fp(fp); 3027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow) { 3047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 3057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt = ti->tidcnt; 3097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cnt) { 3107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("After copyin, tidcnt 0, tidlist %llx\n", 3117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) ti->tidlist); 3127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 3137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Should we treat as success? likely a bug 3147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 3167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid = pd->port_port * dd->ipath_rcvtidcnt; 3199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) { 3209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt; 3219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tid = pd->port_tidcursor; 3229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidoff = 0; 3239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (!subport) { 3249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) + 3259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_rcvtidcnt % pd->port_subport_cnt); 3269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidoff = dd->ipath_rcvtidcnt - tidcnt; 3279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += tidoff; 3289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tid = tidcursor_fp(fp); 3299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 3309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt; 3319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidoff = tidcnt * (subport - 1); 3329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += tidoff; 3339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tid = tidcursor_fp(fp); 3349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 3359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (cnt > tidcnt) { 3367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* make sure it all fits in port_tid_pg_list */ 3377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "Process tried to allocate %u " 3387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "TIDs, only trying max (%u)\n", cnt, tidcnt); 3397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt = tidcnt; 3407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pagep = &((struct page **) pd->port_tid_pg_list)[tidoff]; 3429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidlist = &((u16 *) &pagep[dd->ipath_rcvtidcnt])[tidoff]; 3437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan memset(tidmap, 0, sizeof(tidmap)); 3457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* before decrement; chip actual # */ 3467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ntids = tidcnt; 3477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidbase = (u64 __iomem *) (((char __iomem *) dd->ipath_kregbase) + 3487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidbase + 3497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid * sizeof(*tidbase)); 3507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port%u %u tids, cursor %u, tidbase %p\n", 3527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, cnt, tid, tidbase); 3537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* virtual address of first page in transfer */ 3557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vaddr = ti->tidvaddr; 3567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!access_ok(VERIFY_WRITE, (void __user *) vaddr, 3577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt * PAGE_SIZE)) { 3587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Fail vaddr %p, %u pages, !access_ok\n", 3597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *)vaddr, cnt); 3607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 3617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_get_user_pages(vaddr, cnt, pagep); 3647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) { 3657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret == -EBUSY) { 3667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to lock addr %p, %u pages " 3677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(already locked)\n", 3687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) vaddr, cnt); 3697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 3707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for now, continue, and see what happens but with 3717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the new implementation, this should never happen, 3727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * unless perhaps the user has mpin'ed the pages 3737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * themselves (something we need to test) 3747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 3767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 3777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 3787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "Failed to lock addr %p, %u pages: " 3797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "errno %d\n", (void *) vaddr, cnt, -ret); 3807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < cnt; i++, vaddr += PAGE_SIZE) { 3847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (; ntids--; tid++) { 3857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (tid == tidcnt) 3867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = 0; 3877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow[porttid + tid]) 3887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 3897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ntids < 0) { 3917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 3927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * oops, wrapped all the way through their TIDs, 3937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * and didn't have enough free; see comments at 3947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * start of routine 3957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Not enough free TIDs for %u pages " 3977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(index %d), failing\n", cnt, i); 3987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan i--; /* last tidlist[i] not filled in */ 3997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 4007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 4017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidlist[i] = tid + tidoff; 4037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Updating idx %u to TID %u, " 4049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "vaddr %lx\n", i, tid + tidoff, vaddr); 4057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* we "know" system pages and TID pages are same size */ 4067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[porttid + tid] = pagep[i]; 4071fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_physshadow[porttid + tid] = ipath_map_page( 4081fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->pcidev, pagep[i], 0, PAGE_SIZE, 4091fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PCI_DMA_FROMDEVICE); 4107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 4117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * don't need atomic or it's overhead 4127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan __set_bit(tid, tidmap); 4141fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan physaddr = dd->ipath_physshadow[porttid + tid]; 4157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pagelocks++; 4167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, 4177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "TID %u, vaddr %lx, physaddr %llx pgp %p\n", 4187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid, vaddr, (unsigned long long) physaddr, 4197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pagep[i]); 420f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger dd->ipath_f_put_tid(dd, &tidbase[tid], RCVHQ_RCV_TYPE_EXPECTED, 421f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger physaddr); 4227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 4237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * don't check this tid in ipath_portshadow, since we 4247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * just filled it in; start with the next one. 4257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid++; 4277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) { 4307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 limit; 4317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cleanup: 4327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* jump here if copy out of updated info failed... */ 4337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("After failure (ret=%d), undo %d of %d entries\n", 4347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan -ret, i, cnt); 4357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* same code that's in ipath_free_tid() */ 4367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = sizeof(tidmap) * BITS_PER_BYTE; 4377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (limit > tidcnt) 4387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* just in case size changes in future */ 4397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = tidcnt; 4407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = find_first_bit((const unsigned long *)tidmap, limit); 4417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (; tid < limit; tid++) { 4427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!test_bit(tid, tidmap)) 4437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 4447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pageshadow[porttid + tid]) { 4457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Freeing TID %u\n", 4467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid); 447f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger dd->ipath_f_put_tid(dd, &tidbase[tid], 448f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger RCVHQ_RCV_TYPE_EXPECTED, 4497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_tidinvalid); 4501fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pci_unmap_page(dd->pcidev, 4511fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_physshadow[porttid + tid], 4521fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PAGE_SIZE, PCI_DMA_FROMDEVICE); 4537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[porttid + tid] = NULL; 4547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 4557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_release_user_pages(pagep, cnt); 4587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 4597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 4607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Copy the updated array, with ipath_tid's filled in, back 4617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * to user. Since we did the copy in already, this "should 4627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * never fail" If it does, we have to clean up... 4637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user((void __user *) 4657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) ti->tidlist, 4667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidlist, cnt * sizeof(*tidlist))) { 4677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 4687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto cleanup; 4697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user((void __user *) (unsigned long) ti->tidmap, 4717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidmap, sizeof tidmap)) { 4727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 4737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto cleanup; 4747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (tid == tidcnt) 4767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = 0; 4779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) 4789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_tidcursor = tid; 4799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else 4809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcursor_fp(fp) = tid; 4817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 4847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 4857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to map %u TID pages, failing with %d\n", 4867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, -ret); 4877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 4887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 4897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 4917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_tid_free - free a port TID 4927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 4939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * @subport: the subport 4947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @ti: the TID info 4957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 4967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * right now we are unlocking one page at a time, but since 4977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the intended use of this routine is for a single group of 4987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * virtually contiguous pages, that should change to improve 4997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * performance. We check that the TID is in range for this port 5007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * but otherwise don't check validity; if user has an error and 5017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * frees the wrong tid, it's only their own data that can thereby 5027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * be corrupted. We do check that the TID was in use, for sanity 5037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We always use our idea of the saved address, not the address that 5047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * they pass in to us. 5057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 5067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_tid_free(struct ipath_portdata *pd, unsigned subport, 5087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_tid_info *ti) 5097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 5107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 5117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 tid, porttid, cnt, limit, tidcnt; 5127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 5137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 __iomem *tidbase; 5147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long tidmap[8]; 5157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow) { 5177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 5187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 5197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_from_user(tidmap, (void __user *)(unsigned long)ti->tidmap, 5227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan sizeof tidmap)) { 5237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 5247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 5257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid = pd->port_port * dd->ipath_rcvtidcnt; 5289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) 5299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt; 5309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (!subport) { 5319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) + 5329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_rcvtidcnt % pd->port_subport_cnt); 5339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += dd->ipath_rcvtidcnt - tidcnt; 5349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 5359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt; 5369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += tidcnt * (subport - 1); 5379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 5387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) + 5397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidbase + 5407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid * sizeof(*tidbase)); 5417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = sizeof(tidmap) * BITS_PER_BYTE; 5437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (limit > tidcnt) 5447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* just in case size changes in future */ 5457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = tidcnt; 5467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = find_first_bit(tidmap, limit); 5477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port%u free %u tids; first bit (max=%d) " 5487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "set is %d, porttid %u\n", pd->port_port, ti->tidcnt, 5497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit, tid, porttid); 5507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (cnt = 0; tid < limit; tid++) { 5517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 5527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * small optimization; if we detect a run of 3 or so without 5537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * any set, use find_first_bit again. That's mainly to 5547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * accelerate the case where we wrapped, so we have some at 5557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the beginning, and some at the end, and a big gap 5567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in the middle. 5577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 5587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!test_bit(tid, tidmap)) 5597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 5607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt++; 5617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pageshadow[porttid + tid]) { 5623ac8c70f74ca67111c570f4ba828cc4b6fc229f4Dave Olson struct page *p; 5633ac8c70f74ca67111c570f4ba828cc4b6fc229f4Dave Olson p = dd->ipath_pageshadow[porttid + tid]; 5643ac8c70f74ca67111c570f4ba828cc4b6fc229f4Dave Olson dd->ipath_pageshadow[porttid + tid] = NULL; 5657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "PID %u freeing TID %u\n", 56640d97692fbfe52ef68fa771d8121394b2210fd67Pavel Emelyanov pid_nr(pd->port_pid), tid); 567f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger dd->ipath_f_put_tid(dd, &tidbase[tid], 568f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger RCVHQ_RCV_TYPE_EXPECTED, 5697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_tidinvalid); 5701fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pci_unmap_page(dd->pcidev, 5711fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_physshadow[porttid + tid], 5721fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PAGE_SIZE, PCI_DMA_FROMDEVICE); 5733ac8c70f74ca67111c570f4ba828cc4b6fc229f4Dave Olson ipath_release_user_pages(&p, 1); 5747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 5757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else 5767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Unused tid %u, ignoring\n", tid); 5777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cnt != ti->tidcnt) 5797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("passed in tidcnt %d, only %d bits set in map\n", 5807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, cnt); 5817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 5827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 5837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to unmap %u TID pages, failing with %d\n", 5847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, -ret); 5857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 5867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 5877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 5897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_set_part_key - set a partition key 5907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 5917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @key: the key 5927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 5937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We can have up to 4 active at a time (other than the default, which is 5947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * always allowed). This is somewhat tricky, since multiple ports may set 5957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the same key, so we reference count them, and clean up at exit. All 4 5967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * partition keys are packed into a single infinipath register. It's an 5977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * error for a process to set the same pkey multiple times. We provide no 5987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * mechanism to de-allocate a pkey at this time, we may eventually need to 5997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * do that. I've used the atomic operations, and no locking, and only make 6007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * a single pass through what's available. This should be more than 6017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * adequate for some time. I'll think about spinlocks or the like if and as 6027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * it's necessary. 6037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_set_part_key(struct ipath_portdata *pd, u16 key) 6057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 6067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 6077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, any = 0, pidx = -1; 6087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u16 lkey = key & 0x7FFF; 6097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 6107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 61127b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan if (lkey == (IPATH_DEFAULT_P_KEY & 0x7FFF)) { 6127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* nothing to do; this key always valid */ 6137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 6147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u try to set pkey %hx, current keys " 6187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%hx:%x %hx:%x %hx:%x %hx:%x\n", 6197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, dd->ipath_pkeys[0], 6207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[0]), dd->ipath_pkeys[1], 6217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[1]), dd->ipath_pkeys[2], 6227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[2]), dd->ipath_pkeys[3], 6237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[3])); 6247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!lkey) { 6267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "p%u tries to set key 0, not allowed\n", 6277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port); 6287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 6297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 6337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Set the full membership bit, because it has to be 6347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * set in the register or the packet, and it seems 6357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * cleaner to set in the register than to force all 6367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * callers to set it. (see bug 4331) 6377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan key |= 0x8000; 6397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) { 6417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_pkeys[i] && pidx == -1) 6427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pidx = i; 6437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_pkeys[i] == key) { 6447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u tries to set same pkey " 6457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(%x) more than once\n", 6467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key); 6477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EEXIST; 6487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pidx == -1) { 6527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("All pkeys for port %u already in use, " 6537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 6547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 6557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) { 6587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pkeys[i]) { 6597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan any++; 6607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 6617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pkeys[i] == key) { 6637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_t *pkrefs = &dd->ipath_pkeyrefs[i]; 6647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_inc_return(pkrefs) > 1) { 6667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[pidx] = key; 6677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u set key %x " 6687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "matches #%d, count now %d\n", 6697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, i, 6707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(pkrefs)); 6717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 6727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 6747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 6757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * lost race, decrement count, catch below 6767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_dec(pkrefs); 6787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Lost race, count was " 6797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "0, after dec, it's %d\n", 6807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(pkrefs)); 6817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan any++; 6827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) { 6857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 6867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * It makes no sense to have both the limited and 6877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * full membership PKEY set at the same time since 6887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the unlimited one will disable the limited one. 6897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EEXIST; 6917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!any) { 6957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u, all pkeys already in use, " 6967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 6977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 6987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) { 7017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pkeys[i] && 7027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) { 7037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pkey; 7047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for ipathstats, etc. */ 7067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pkeys[i] = lkey; 7077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[pidx] = dd->ipath_pkeys[i] = key; 7087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pkey = 7097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (u64) dd->ipath_pkeys[0] | 7107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 7117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 7127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 7137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "p%u set key %x in #%d, " 7147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "portidx %d, new pkey reg %llx\n", 7157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, i, pidx, 7167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pkey); 7177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg( 7187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd, dd->ipath_kregs->kr_partitionkey, pkey); 7197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 7217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 7227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u, all pkeys already in use 2nd pass, " 7257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 7267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 7277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 7297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 7307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 7317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 7337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_manage_rcvq - manage a port's receive queue 7347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 7359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * @subport: the subport 7367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @start_stop: action to carry out 7377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 7387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * start_stop == 0 disables receive on the port, for use in queue 7397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * overflow conditions. start_stop==1 re-enables, to be used to 7407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * re-init the software copy of the head register 7417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 7429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_manage_rcvq(struct ipath_portdata *pd, unsigned subport, 7439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int start_stop) 7447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 7457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 7467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(PROC, "%sabling rcv for unit %u port %u:%u\n", 7487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan start_stop ? "en" : "dis", dd->ipath_unit, 7499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, subport); 7509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (subport) 7519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 7527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* atomically clear receive enable port. */ 7537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (start_stop) { 7547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 7557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * On enable, force in-memory copy of the tail register to 7567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 0, so that protocol code doesn't have to worry about 7577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * whether or not the chip has yet updated the in-memory 7587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * copy or not on return from the system call. The chip 7597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * always resets it's tail register back to 0 on a 7607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * transition from disabled to enabled. This could cause a 7617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * problem if software was broken, and did the enable w/o 7627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the disable, but eventually the in-memory copy will be 7637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * updated and correct itself, even in the face of software 7647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * bugs. 7657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 766c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell if (pd->port_rcvhdrtail_kvaddr) 767c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell ipath_clear_rcvhdrtail(pd); 768d8274869d742c3d8082e1428de47e54d12104928Dave Olson set_bit(dd->ipath_r_portenable_shift + pd->port_port, 7697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_rcvctrl); 7707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else 771d8274869d742c3d8082e1428de47e54d12104928Dave Olson clear_bit(dd->ipath_r_portenable_shift + pd->port_port, 7727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_rcvctrl); 7737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 7747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl); 7757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* now be sure chip saw it before we return */ 77644f8e3f3f7d8e61b4aafced278403955fe18ad88Roland Dreier ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); 7777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (start_stop) { 7787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 7797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * And try to be sure that tail reg update has happened too. 7807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This should in theory interlock with the RXE changes to 7817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the tail register. Don't assign it to the tail register 7827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in memory copy, since we could overwrite an update by the 7837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * chip if we did. 7847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 78544f8e3f3f7d8e61b4aafced278403955fe18ad88Roland Dreier ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); 7867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* always; new head should be equal to new tail; see above */ 7889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 7897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return 0; 7907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 7917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void ipath_clean_part_key(struct ipath_portdata *pd, 7937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd) 7947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 7957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, j, pchanged = 0; 7967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 oldpkey; 7977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for debugging only */ 7997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan oldpkey = (u64) dd->ipath_pkeys[0] | 8007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 8017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 8027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 8037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) { 8057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_pkeys[i]) 8067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 8077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "look for key[%d] %hx in pkeys\n", i, 8087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i]); 8097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (j = 0; j < ARRAY_SIZE(dd->ipath_pkeys); j++) { 8107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* check for match independent of the global bit */ 8117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((dd->ipath_pkeys[j] & 0x7fff) != 8127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (pd->port_pkeys[i] & 0x7fff)) 8137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 8147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_dec_and_test(&dd->ipath_pkeyrefs[j])) { 8157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u clear key " 8167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%x matches #%d\n", 8177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, 8187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i], j); 8197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pkeys[j] = 8207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pkeys[j] = 0; 8217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pchanged++; 8227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else ipath_cdbg( 8247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan VERBOSE, "p%u key %x matches #%d, " 8257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "but ref still %d\n", pd->port_port, 8267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i], j, 8277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[j])); 8287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 8297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i] = 0; 8317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pchanged) { 8337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pkey = (u64) dd->ipath_pkeys[0] | 8347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 8357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 8367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 8377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u old pkey reg %llx, " 8387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "new pkey reg %llx\n", pd->port_port, 8397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) oldpkey, 8407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pkey); 8417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey, 8427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pkey); 8437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 8457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan/* 8479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Initialize the port data with the receive buffer sizes 8489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * so this can be done while the master port is locked. 8499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Otherwise, there is a race with a slave opening the port 8509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * and seeing these fields uninitialized. 8519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 8529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic void init_user_egr_sizes(struct ipath_portdata *pd) 8539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 8549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 8559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned egrperchunk, egrcnt, size; 8569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 8579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 8589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * to avoid wasting a lot of memory, we allocate 32KB chunks of 8599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * physically contiguous memory, advance through it until used up 8609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * and then allocate more. Of course, we need memory to store those 8619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * extra pointers, now. Started out with 256KB, but under heavy 8629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * memory pressure (creating large files and then copying them over 8639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * NFS while doing lots of MPI jobs), we hit some allocation 8649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * failures, even though we can sleep... (2.6.10) Still get 8659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * failures at 64K. 32K is the lowest we can go without wasting 8669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * additional memory. 8679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 8689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = 0x8000; 8699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan egrperchunk = size / dd->ipath_rcvegrbufsize; 8709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan egrcnt = dd->ipath_rcvegrcnt; 8719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf_chunks = (egrcnt + egrperchunk - 1) / egrperchunk; 8729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbufs_perchunk = egrperchunk; 8739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf_size = size; 8749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 8759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 8767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 8777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_create_user_egr - allocate eager TID buffers 8787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port to allocate TID buffers for 8797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 8807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This routine is now quite different for user and kernel, because 8817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the kernel uses skb's, for the accelerated network performance 8827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This is the user port version 8837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 8847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Allocate the eager TID buffers and program them into infinipath 8857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * They are no longer completely contiguous, we do multiple allocation 8867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * calls. 8877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 8887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_create_user_egr(struct ipath_portdata *pd) 8897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 8907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 8919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned e, egrcnt, egrperchunk, chunk, egrsize, egroff; 8927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t size; 8937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 8940ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan gfp_t gfp_flags; 8950ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan 8960ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan /* 8970ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * GFP_USER, but without GFP_FS, so buffer cache can be 8980ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * coalesced (we hope); otherwise, even at order 4, 8990ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * heavy filesystem activity makes these fail, and we can 9000ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * use compound pages. 9010ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan */ 9020ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan gfp_flags = __GFP_WAIT | __GFP_IO | __GFP_COMP; 9037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egrcnt = dd->ipath_rcvegrcnt; 9057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* TID number offset for this port */ 90660948a415859cb859e24f0dfe739069d66577466Ralph Campbell egroff = (pd->port_port - 1) * egrcnt + dd->ipath_p0_rcvegrcnt; 9077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egrsize = dd->ipath_rcvegrbufsize; 9087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Allocating %d egr buffers, at egrtid " 9097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "offset %x, egrsize %u\n", egrcnt, egroff, egrsize); 9107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan chunk = pd->port_rcvegrbuf_chunks; 9129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan egrperchunk = pd->port_rcvegrbufs_perchunk; 9139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = pd->port_rcvegrbuf_size; 9149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf = kmalloc(chunk * sizeof(pd->port_rcvegrbuf[0]), 9159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan GFP_KERNEL); 9167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf) { 9177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 9187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 9197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys = 9219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kmalloc(chunk * sizeof(pd->port_rcvegrbuf_phys[0]), 9229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan GFP_KERNEL); 9237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf_phys) { 9247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 9257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail_rcvegrbuf; 9267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) { 9287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf[e] = dma_alloc_coherent( 9307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->pcidev->dev, size, &pd->port_rcvegrbuf_phys[e], 9317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan gfp_flags); 9327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf[e]) { 9347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 9357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail_rcvegrbuf_phys; 9367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegr_phys = pd->port_rcvegrbuf_phys[0]; 9407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = chunk = 0; chunk < pd->port_rcvegrbuf_chunks; chunk++) { 9427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dma_addr_t pa = pd->port_rcvegrbuf_phys[chunk]; 9437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned i; 9447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; e < egrcnt && i < egrperchunk; e++, i++) { 9467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_f_put_tid(dd, e + egroff + 9477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (u64 __iomem *) 9487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((char __iomem *) 9497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_kregbase + 950f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger dd->ipath_rcvegrbase), 951f716cdfe57f217966f41a7add190d6f5b9fd0769Joan Eslinger RCVHQ_RCV_TYPE_EAGER, pa); 9527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pa += egrsize; 9537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cond_resched(); /* don't hog the cpu */ 9557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 9587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 9597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail_rcvegrbuf_phys: 9617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = 0; e < pd->port_rcvegrbuf_chunks && 962f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan pd->port_rcvegrbuf[e]; e++) { 9637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dma_free_coherent(&dd->pcidev->dev, size, 9647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf[e], 9657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys[e]); 9667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 967f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 9689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(pd->port_rcvegrbuf_phys); 9697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys = NULL; 9707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail_rcvegrbuf: 9719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(pd->port_rcvegrbuf); 9727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf = NULL; 9737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 9747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 9757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 9767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 977f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 978f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan/* common code for the mappings on dma_alloc_coherent mem */ 979f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivanstatic int ipath_mmap_mem(struct vm_area_struct *vma, 9801fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan struct ipath_portdata *pd, unsigned len, int write_ok, 9811fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan void *kvaddr, char *what) 982f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan{ 983f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 9841fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan unsigned long pfn; 985f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan int ret; 986f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 987f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > len) { 988f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dev_info(&dd->pcidev->dev, 989f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "FAIL on %s: len %lx > %x\n", what, 990f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_end - vma->vm_start, len); 991f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = -EFAULT; 992f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan goto bail; 993f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 994f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 995f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (!write_ok) { 996f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (vma->vm_flags & VM_WRITE) { 997f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dev_info(&dd->pcidev->dev, 998f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "%s must be mapped readonly\n", what); 999f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = -EPERM; 1000f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan goto bail; 1001f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 1002f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 1003f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* don't allow them to later change with mprotect */ 1004f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYWRITE; 1005f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 1006f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 10071fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pfn = virt_to_phys(kvaddr) >> PAGE_SHIFT; 1008f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = remap_pfn_range(vma, vma->vm_start, pfn, 1009f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan len, vma->vm_page_prot); 1010f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (ret) 10111fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dev_info(&dd->pcidev->dev, "%s port%u mmap of %lx, %x " 10121fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan "bytes r%c failed: %d\n", what, pd->port_port, 10131fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pfn, len, write_ok?'w':'o', ret); 1014f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan else 10151fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan ipath_cdbg(VERBOSE, "%s port%u mmaped %lx, %x bytes " 10161fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan "r%c\n", what, pd->port_port, pfn, len, 10171fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan write_ok?'w':'o'); 1018f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivanbail: 1019f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan return ret; 1020f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan} 1021f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 10227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_ureg(struct vm_area_struct *vma, struct ipath_devdata *dd, 10237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 ureg) 10247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long phys; 10267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 10277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1028f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* 1029f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * This is real hardware, so use io_remap. This is the mechanism 1030f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * for the user process to update the head registers for their port 1031f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * in the chip. 1032f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan */ 10337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > PAGE_SIZE) { 10347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL mmap userreg: reqlen " 10357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%lx > PAGE\n", vma->vm_end - vma->vm_start); 10367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 10377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 10387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys = dd->ipath_physaddr + ureg; 10397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 10407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; 10427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = io_remap_pfn_range(vma, vma->vm_start, 10437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys >> PAGE_SHIFT, 10447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 10457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot); 10467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 10487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 10497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_piobufs(struct vm_area_struct *vma, 10517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd, 10529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd, 10539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned piobufs, unsigned piocnt) 10547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long phys; 10567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 10577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1059f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * When we map the PIO buffers in the chip, we want to map them as 1060f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * writeonly, no read possible. This prevents access to previous 1061f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * process data, and catches users who might try to read the i/o 1062f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * space due to a bug. 10637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 10649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > (piocnt * dd->ipath_palign)) { 10657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL mmap piobufs: " 10667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "reqlen %lx > PAGE\n", 10677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start); 10689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 10697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan phys = dd->ipath_physaddr + piobufs; 1073f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 1074eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan#if defined(__powerpc__) 1075eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan /* There isn't a generic way to specify writethrough mappings */ 1076eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; 1077eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) |= _PAGE_WRITETHRU; 1078eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) &= ~_PAGE_GUARDED; 1079eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan#endif 1080eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan 1081367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan /* 1082367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan * don't allow them to later change to readable with mprotect (for when 1083367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan * not initially mapped readable, as is normally the case) 1084367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan */ 1085f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYREAD; 10867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; 10877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = io_remap_pfn_range(vma, vma->vm_start, phys >> PAGE_SHIFT, 10897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 10907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot); 10917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 10927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 10937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 10947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_rcvegrbufs(struct vm_area_struct *vma, 10967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd) 10977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 10997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long start, size; 11007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t total_size, i; 11011fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan unsigned long pfn; 11027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 11037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size = pd->port_rcvegrbuf_size; 11057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan total_size = pd->port_rcvegrbuf_chunks * size; 11067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > total_size) { 11077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL on egr bufs: " 11087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "reqlen %lx > actual %lx\n", 11097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 11107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) total_size); 11119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 11127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 11137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 11147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (vma->vm_flags & VM_WRITE) { 11167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "Can't map eager buffers as " 11177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "writable (flags=%lx)\n", vma->vm_flags); 11187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EPERM; 11197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 11207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1121f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* don't allow them to later change to writeable with mprotect */ 1122f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYWRITE; 11237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan start = vma->vm_start; 11257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < pd->port_rcvegrbuf_chunks; i++, start += size) { 11271fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pfn = virt_to_phys(pd->port_rcvegrbuf[i]) >> PAGE_SHIFT; 11281fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan ret = remap_pfn_range(vma, start, pfn, size, 11291fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan vma->vm_page_prot); 11307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 11317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 11327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 11337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 11347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 11367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 11377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 11387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan/* 11403c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin * ipath_file_vma_fault - handle a VMA page fault. 11419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 11423c8450860ba9d6279dbc969633eacf99161860d9Nick Pigginstatic int ipath_file_vma_fault(struct vm_area_struct *vma, 11433c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin struct vm_fault *vmf) 11449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 11453c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin struct page *page; 11469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11473c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT)); 11489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!page) 11493c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin return VM_FAULT_SIGBUS; 11509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan get_page(page); 11513c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin vmf->page = page; 11523c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin 11533c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin return 0; 11549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 11559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1156f0f37e2f77731b3473fa6bd5ee53255d9a9cdb40Alexey Dobriyanstatic const struct vm_operations_struct ipath_file_vm_ops = { 11573c8450860ba9d6279dbc969633eacf99161860d9Nick Piggin .fault = ipath_file_vma_fault, 11589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan}; 11599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int mmap_kvaddr(struct vm_area_struct *vma, u64 pgaddr, 11619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd, unsigned subport) 11629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 11639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned long len; 11649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_devdata *dd; 11659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan void *addr; 11669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t size; 11670a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell int ret = 0; 11689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* If the port is not shared, all addresses should be physical */ 11700a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (!pd->port_subport_cnt) 11719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 11729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd = pd->port_dd; 11749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size; 11759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 1177c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * Each process has all the subport uregbase, rcvhdrq, and 1178c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * rcvegrbufs mmapped - as an array for all the processes, 1179c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * and also separately for this process. 11809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 1181c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage if (pgaddr == cvt_kvaddr(pd->subport_uregbase)) { 1182c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_uregbase; 1183c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size = PAGE_SIZE * pd->port_subport_cnt; 1184c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base)) { 1185c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_rcvhdr_base; 1186c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size = pd->port_rcvhdrq_size * pd->port_subport_cnt; 1187c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf)) { 1188c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_rcvegrbuf; 1189c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size *= pd->port_subport_cnt; 1190c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_uregbase + 1191c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage PAGE_SIZE * subport)) { 1192c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_uregbase + PAGE_SIZE * subport; 1193c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size = PAGE_SIZE; 1194c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base + 1195c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvhdrq_size * subport)) { 1196c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_rcvhdr_base + 1197c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvhdrq_size * subport; 1198c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size = pd->port_rcvhdrq_size; 1199c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf + 1200c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage size * subport)) { 1201c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage addr = pd->subport_rcvegrbuf + size * subport; 1202c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage /* rcvegrbufs are read-only on the slave */ 1203c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage if (vma->vm_flags & VM_WRITE) { 1204c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage dev_info(&dd->pcidev->dev, 1205c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage "Can't map eager buffers as " 1206c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage "writable (flags=%lx)\n", vma->vm_flags); 1207c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage ret = -EPERM; 1208c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage goto bail; 1209c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } 1210c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage /* 1211c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * Don't allow permission to later change to writeable 1212c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage * with mprotect. 1213c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage */ 1214c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage vma->vm_flags &= ~VM_MAYWRITE; 1215c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } else { 12169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 1217c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } 12189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan len = vma->vm_end - vma->vm_start; 12199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (len > size) { 12209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(MM, "FAIL: reqlen %lx > %zx\n", len, size); 12219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 12229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 12239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 12249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_pgoff = (unsigned long) addr >> PAGE_SHIFT; 12269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_ops = &ipath_file_vm_ops; 12279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_flags |= VM_RESERVED | VM_DONTEXPAND; 12280a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell ret = 1; 12299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 12319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 12329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 12339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 12357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_mmap - mmap various structures into user space 12367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @fp: the file pointer 12377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @vma: the VM area 12387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 12397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We use this to have a shared buffer between the kernel and the user code 12407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for the rcvhdr queue, egr buffers, and the per-port user regs and pio 12417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * buffers in the chip. We have the open and close entries so we can bump 12427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the ref count and keep the driver from being unloaded while still mapped. 12437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_mmap(struct file *fp, struct vm_area_struct *vma) 12457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 12467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 12477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 12487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pgaddr, ureg; 12499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned piobufs, piocnt; 12507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 12517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 12539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd) { 12549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 12559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 12569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 12577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 1258f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 12597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 12607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This is the ipath_do_user_init() code, mapping the shared buffers 12617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * into the user process. The address referred to by vm_pgoff is the 12629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * file offset passed via mmap(). For shared ports, this is the 12639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * kernel vmalloc() address of the pages to share with the master. 12649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * For non-shared or master ports, this is a physical address. 12659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * We only do one mmap for each space mapped. 12667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pgaddr = vma->vm_pgoff << PAGE_SHIFT; 12687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 12709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Check for 0 in case one of the allocations failed, but user 12719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * called mmap anyway. 12727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pgaddr) { 12749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 12759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 1276f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 12777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(MM, "pgaddr %llx vm_start=%lx len %lx port %u:%u:%u\n", 12797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pgaddr, vma->vm_start, 12809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_end - vma->vm_start, dd->ipath_unit, 12819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, subport_fp(fp)); 12827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 12849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Physical addresses must fit in 40 bits for our hardware. 12859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Check for kernel virtual addresses first, anything else must 12869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * match a HW or memory address. 12879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 12880a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell ret = mmap_kvaddr(vma, pgaddr, pd, subport_fp(fp)); 12890a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (ret) { 12900a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (ret > 0) 12910a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell ret = 0; 12929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 12939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 12949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1295a18e26ae442001de62f6b84a923e8613347dc35fRalph Campbell ureg = dd->ipath_uregbase + dd->ipath_ureg_align * pd->port_port; 12969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) { 12979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* port is not shared */ 1298e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson piocnt = pd->port_piocnt; 12999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piobufs = pd->port_piobufs; 13009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (!subport_fp(fp)) { 13019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* caller is the master */ 1302e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson piocnt = (pd->port_piocnt / pd->port_subport_cnt) + 1303e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson (pd->port_piocnt % pd->port_subport_cnt); 13049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piobufs = pd->port_piobufs + 1305e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson dd->ipath_palign * (pd->port_piocnt - piocnt); 13069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 13079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned slave = subport_fp(fp) - 1; 13089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 13099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* caller is a slave */ 1310e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson piocnt = pd->port_piocnt / pd->port_subport_cnt; 13119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piobufs = pd->port_piobufs + dd->ipath_palign * piocnt * slave; 1312f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 13139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 13149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (pgaddr == ureg) 13157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_ureg(vma, dd, ureg); 13169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == piobufs) 13179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = mmap_piobufs(vma, dd, pd, piobufs, piocnt); 13189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == dd->ipath_pioavailregs_phys) 13199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* in-memory copy of pioavail registers */ 13209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0, 13211fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan (void *) dd->ipath_pioavailregs_dma, 13229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "pioavail registers"); 13239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == pd->port_rcvegr_phys) 13247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_rcvegrbufs(vma, pd); 13259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == (u64) pd->port_rcvhdrq_phys) 1326f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* 1327525d0ca1d452ed336c1d907fb20c104467a8a47bBryan O'Sullivan * The rcvhdrq itself; readonly except on HT (so have 1328f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * to allow writable mapping), multiple pages, contiguous 1329f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * from an i/o perspective. 1330f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan */ 13319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, pd->port_rcvhdrq_size, 1, 13321fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pd->port_rcvhdrq, 1333f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "rcvhdrq"); 13349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == (u64) pd->port_rcvhdrqtailaddr_phys) 1335f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* in-memory copy of rcvhdrq tail register */ 1336f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0, 13371fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pd->port_rcvhdrtail_kvaddr, 1338f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "rcvhdrq tail"); 13397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else 13407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 13417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_private_data = NULL; 13437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 13457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 13469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "Failure %d on off %llx len %lx\n", 13479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan -ret, (unsigned long long)pgaddr, 13489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_end - vma->vm_start); 13499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 13507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 13517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 13527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 135370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jonesstatic unsigned ipath_poll_hdrqfull(struct ipath_portdata *pd) 135470c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones{ 135570c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones unsigned pollflag = 0; 135670c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 135770c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones if ((pd->poll_type & IPATH_POLL_TYPE_OVERFLOW) && 135870c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_hdrqfull != pd->port_hdrqfull_poll) { 135970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pollflag |= POLLIN | POLLRDNORM; 136070c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_hdrqfull_poll = pd->port_hdrqfull; 136170c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones } 136270c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 136370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones return pollflag; 136470c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones} 136570c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 1366f2d042313e420002b06715675963cfab48ed2597Robert Walshstatic unsigned int ipath_poll_urgent(struct ipath_portdata *pd, 1367f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct file *fp, 1368f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct poll_table_struct *pt) 13697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 1370e35d710d0c5b74bc9833d6a3791706bd577a3724Bryan O'Sullivan unsigned pollflag = 0; 13717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 13727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 13747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 137570c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* variable access in ipath_poll_hdrqfull() needs this */ 137670c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones rmb(); 137770c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pollflag = ipath_poll_hdrqfull(pd); 13787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 137970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones if (pd->port_urgent != pd->port_urgent_poll) { 1380f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag |= POLLIN | POLLRDNORM; 138170c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_urgent_poll = pd->port_urgent; 1382f2d042313e420002b06715675963cfab48ed2597Robert Walsh } 13837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1384f2d042313e420002b06715675963cfab48ed2597Robert Walsh if (!pollflag) { 138570c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* this saves a spin_lock/unlock in interrupt handler... */ 1386f2d042313e420002b06715675963cfab48ed2597Robert Walsh set_bit(IPATH_PORT_WAITING_URG, &pd->port_flag); 138770c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* flush waiting flag so don't miss an event... */ 138870c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones wmb(); 1389f2d042313e420002b06715675963cfab48ed2597Robert Walsh poll_wait(fp, &pd->port_wait, pt); 1390f2d042313e420002b06715675963cfab48ed2597Robert Walsh } 1391f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1392f2d042313e420002b06715675963cfab48ed2597Robert Walsh return pollflag; 1393f2d042313e420002b06715675963cfab48ed2597Robert Walsh} 1394f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1395f2d042313e420002b06715675963cfab48ed2597Robert Walshstatic unsigned int ipath_poll_next(struct ipath_portdata *pd, 1396f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct file *fp, 1397f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct poll_table_struct *pt) 1398f2d042313e420002b06715675963cfab48ed2597Robert Walsh{ 139970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones u32 head; 140070c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones u32 tail; 1401f2d042313e420002b06715675963cfab48ed2597Robert Walsh unsigned pollflag = 0; 1402f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct ipath_devdata *dd; 1403f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1404f2d042313e420002b06715675963cfab48ed2597Robert Walsh dd = pd->port_dd; 14057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 140670c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* variable access in ipath_poll_hdrqfull() needs this */ 140770c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones rmb(); 140870c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pollflag = ipath_poll_hdrqfull(pd); 140970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 14107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan head = ipath_read_ureg32(dd, ur_rcvhdrhead, pd->port_port); 1411c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell if (pd->port_rcvhdrtail_kvaddr) 1412c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell tail = ipath_get_rcvhdrtail(pd); 1413c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell else 1414c59a80aca0bfc491d90534ed5606d5493eca24a3Ralph Campbell tail = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); 1415f2d042313e420002b06715675963cfab48ed2597Robert Walsh 141670c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones if (head != tail) 1417f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag |= POLLIN | POLLRDNORM; 141870c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones else { 141970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* this saves a spin_lock/unlock in interrupt handler */ 14207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan set_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag); 142170c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* flush waiting flag so we don't miss an event */ 142270c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones wmb(); 1423f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1424d8274869d742c3d8082e1428de47e54d12104928Dave Olson set_bit(pd->port_port + dd->ipath_r_intravail_shift, 1425f2d042313e420002b06715675963cfab48ed2597Robert Walsh &dd->ipath_rcvctrl); 1426f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1427f2d042313e420002b06715675963cfab48ed2597Robert Walsh ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 1428f2d042313e420002b06715675963cfab48ed2597Robert Walsh dd->ipath_rcvctrl); 1429f2d042313e420002b06715675963cfab48ed2597Robert Walsh 14309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (dd->ipath_rhdrhead_intr_off) /* arm rcv interrupt */ 1431f2d042313e420002b06715675963cfab48ed2597Robert Walsh ipath_write_ureg(dd, ur_rcvhdrhead, 1432f2d042313e420002b06715675963cfab48ed2597Robert Walsh dd->ipath_rhdrhead_intr_off | head, 1433f2d042313e420002b06715675963cfab48ed2597Robert Walsh pd->port_port); 14347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1435f2d042313e420002b06715675963cfab48ed2597Robert Walsh poll_wait(fp, &pd->port_wait, pt); 14367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 14377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1438f2d042313e420002b06715675963cfab48ed2597Robert Walsh return pollflag; 1439f2d042313e420002b06715675963cfab48ed2597Robert Walsh} 1440f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1441f2d042313e420002b06715675963cfab48ed2597Robert Walshstatic unsigned int ipath_poll(struct file *fp, 1442f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct poll_table_struct *pt) 1443f2d042313e420002b06715675963cfab48ed2597Robert Walsh{ 1444f2d042313e420002b06715675963cfab48ed2597Robert Walsh struct ipath_portdata *pd; 1445f2d042313e420002b06715675963cfab48ed2597Robert Walsh unsigned pollflag; 1446f2d042313e420002b06715675963cfab48ed2597Robert Walsh 1447f2d042313e420002b06715675963cfab48ed2597Robert Walsh pd = port_fp(fp); 1448f2d042313e420002b06715675963cfab48ed2597Robert Walsh if (!pd) 1449f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag = 0; 1450f2d042313e420002b06715675963cfab48ed2597Robert Walsh else if (pd->poll_type & IPATH_POLL_TYPE_URGENT) 1451f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag = ipath_poll_urgent(pd, fp, pt); 1452f2d042313e420002b06715675963cfab48ed2597Robert Walsh else 1453f2d042313e420002b06715675963cfab48ed2597Robert Walsh pollflag = ipath_poll_next(pd, fp, pt); 14547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1455e35d710d0c5b74bc9833d6a3791706bd577a3724Bryan O'Sullivan return pollflag; 14567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 14577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14580df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbagestatic int ipath_supports_subports(int user_swmajor, int user_swminor) 14590df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage{ 14600df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* no subport implementation prior to software version 1.3 */ 14610df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return (user_swmajor > 1) || (user_swminor >= 3); 14620df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage} 14630df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage 14640df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbagestatic int ipath_compatible_subports(int user_swmajor, int user_swminor) 14650df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage{ 14660df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* this code is written long-hand for clarity */ 14670df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (IPATH_USER_SWMAJOR != user_swmajor) { 14680df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* no promise of compatibility if major mismatch */ 14690df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return 0; 14700df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage } 14710df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (IPATH_USER_SWMAJOR == 1) { 14720df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage switch (IPATH_USER_SWMINOR) { 14730df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage case 0: 14740df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage case 1: 14750df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage case 2: 14760df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* no subport implementation so cannot be compatible */ 14770df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return 0; 14780df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage case 3: 14790df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* 3 is only compatible with itself */ 14800df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return user_swminor == 3; 14810df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage default: 14820df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* >= 4 are compatible (or are expected to be) */ 14830df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return user_swminor >= 4; 14840df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage } 14850df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage } 14860df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* make no promises yet for future major versions */ 14870df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage return 0; 14880df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage} 14890df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage 14909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int init_subports(struct ipath_devdata *dd, 14919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd, 14929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 14939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 14949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret = 0; 1495c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage unsigned num_subports; 14969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t size; 14979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 14989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 1499bacf4013530e7fc230a8aa0c6ea3c17fc2f47665Mark Debbage * If the user is requesting zero subports, 15009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * skip the subport allocation. 15019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 1502bacf4013530e7fc230a8aa0c6ea3c17fc2f47665Mark Debbage if (uinfo->spu_subport_cnt <= 0) 15039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 1504c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage 15050df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* Self-consistency check for ipath_compatible_subports() */ 15060df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (ipath_supports_subports(IPATH_USER_SWMAJOR, IPATH_USER_SWMINOR) && 15070df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage !ipath_compatible_subports(IPATH_USER_SWMAJOR, 15080df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage IPATH_USER_SWMINOR)) { 1509c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage dev_info(&dd->pcidev->dev, 15100df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage "Inconsistent ipath_compatible_subports()\n"); 15110df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage goto bail; 15120df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage } 15130df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage 15140df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage /* Check for subport compatibility */ 15150df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (!ipath_compatible_subports(uinfo->spu_userversion >> 16, 15160df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage uinfo->spu_userversion & 0xffff)) { 15170df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage dev_info(&dd->pcidev->dev, 15180df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage "Mismatched user version (%d.%d) and driver " 15190df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage "version (%d.%d) while port sharing. Ensure " 1520c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage "that driver and library are from the same " 1521c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage "release.\n", 15220df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage (int) (uinfo->spu_userversion >> 16), 1523c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage (int) (uinfo->spu_userversion & 0xffff), 15240df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage IPATH_USER_SWMAJOR, 1525c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage IPATH_USER_SWMINOR); 1526c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage goto bail; 1527c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage } 15280a5a83cffc03592c2102ad07b7532b596a16f8cdRalph Campbell if (uinfo->spu_subport_cnt > INFINIPATH_MAX_SUBPORT) { 15299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 15309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 15319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 15329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1533c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage num_subports = uinfo->spu_subport_cnt; 1534c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->subport_uregbase = vmalloc(PAGE_SIZE * num_subports); 15359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->subport_uregbase) { 15369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENOMEM; 15379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 15389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 15399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Note: pd->port_rcvhdrq_size isn't initialized yet. */ 15409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize * 1541c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage sizeof(u32), PAGE_SIZE) * num_subports; 15429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->subport_rcvhdr_base = vmalloc(size); 15439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->subport_rcvhdr_base) { 15449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENOMEM; 15459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail_ureg; 15469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 15479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 15489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->subport_rcvegrbuf = vmalloc(pd->port_rcvegrbuf_chunks * 15499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf_size * 1550c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage num_subports); 15519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->subport_rcvegrbuf) { 15529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENOMEM; 15539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail_rhdr; 15549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 15559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 15569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_subport_cnt = uinfo->spu_subport_cnt; 15579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_subport_id = uinfo->spu_subport_id; 15589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->active_slaves = 1; 1559947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell set_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag); 1560c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage memset(pd->subport_uregbase, 0, PAGE_SIZE * num_subports); 1561c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage memset(pd->subport_rcvhdr_base, 0, size); 1562c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage memset(pd->subport_rcvegrbuf, 0, pd->port_rcvegrbuf_chunks * 1563c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage pd->port_rcvegrbuf_size * 1564c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage num_subports); 15659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 15669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 15679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail_rhdr: 15689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vfree(pd->subport_rcvhdr_base); 15699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail_ureg: 15709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vfree(pd->subport_uregbase); 15719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->subport_uregbase = NULL; 15729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 15739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 15749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 15759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 15767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int try_alloc_port(struct ipath_devdata *dd, int port, 15779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct file *fp, 15789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 15797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 15809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd; 15817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 15827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!(pd = dd->ipath_pd[port])) { 15849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan void *ptmp; 15857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd = kzalloc(sizeof(struct ipath_portdata), GFP_KERNEL); 15877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 15897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Allocate memory for use in ipath_tid_update() just once 15907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * at open, not per call. Reduces cost of expected send 15917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * setup. 15927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 15937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ptmp = kmalloc(dd->ipath_rcvtidcnt * sizeof(u16) + 15947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidcnt * sizeof(struct page **), 15957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan GFP_KERNEL); 15969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd || !ptmp) { 15977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Unable to allocate portdata " 15987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "memory, failing open\n"); 15997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 16009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(pd); 16017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kfree(ptmp); 16027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_pd[port] = pd; 16057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_port = port; 16067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_dd = dd; 16077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_tid_pg_list = ptmp; 16087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan init_waitqueue_head(&dd->ipath_pd[port]->port_wait); 16097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_cnt) { 16119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->userversion = uinfo->spu_userversion; 16129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan init_user_egr_sizes(pd); 16139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if ((ret = init_subports(dd, pd, uinfo)) != 0) 16149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 16157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] opened unit:port %u:%u\n", 16167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, dd->ipath_unit, 16177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan port); 16189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_cnt = 1; 16199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan port_fp(fp) = pd; 162040d97692fbfe52ef68fa771d8121394b2210fd67Pavel Emelyanov pd->port_pid = get_pid(task_pid(current)); 1621286b63d09660de0fbd0d7748984d7ae491c7fdb6Roel Kluin strlcpy(pd->port_comm, current->comm, sizeof(pd->port_comm)); 16227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_ports++; 16237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 16249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else 16259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EBUSY; 16267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 16287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 16297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 16307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic inline int usable(struct ipath_devdata *dd) 16327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 16337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return dd && 16347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (dd->ipath_flags & IPATH_PRESENT) && 16357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_kregbase && 16367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_lid && 16377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan !(dd->ipath_flags & (IPATH_LINKDOWN | IPATH_DISABLED 16387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan | IPATH_LINKUNK)); 16397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 16407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int find_free_port(int unit, struct file *fp, 16429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 16437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 16447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(unit); 16457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret, i; 16467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd) { 16487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENODEV; 16497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!usable(dd)) { 16537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENETDOWN; 16547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan for (i = 1; i < dd->ipath_cfgports; i++) { 16589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = try_alloc_port(dd, i, fp, uinfo); 16597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret != -EBUSY) 16607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 16637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 16657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 16667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 16677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int find_best_unit(struct file *fp, 16699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 16707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 16717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0, i, prefunit = -1, devmax; 16727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int maxofallports, npresent, nup; 16737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ndev; 16747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan devmax = ipath_count_units(&npresent, &nup, &maxofallports); 16767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 16787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This code is present to allow a knowledgeable person to 16797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * specify the layout of processes to processors before opening 16807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * this driver, and then we'll assign the process to the "closest" 1681525d0ca1d452ed336c1d907fb20c104467a8a47bBryan O'Sullivan * InfiniPath chip to that processor (we assume reasonable connectivity, 16827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for now). This code assumes that if affinity has been set 16837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * before this point, that at most one cpu is set; for now this 1684cbe31f02f5b5536f17dd978118e25052af528071Rusty Russell * is reasonable. I check for both cpumask_empty() and cpumask_full(), 16857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in case some kernel variant sets none of the bits when no 16867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * affinity is set. 2.6.11 and 12 kernels have all present 16877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * cpus set. Some day we'll have to fix it up further to handle 1688525d0ca1d452ed336c1d907fb20c104467a8a47bBryan O'Sullivan * a cpu subset. This algorithm fails for two HT chips connected 16897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in tunnel fashion. Eventually this needs real topology 16907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * information. There may be some issues with dual core numbering 16917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * as well. This needs more work prior to release. 16927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1693cbe31f02f5b5536f17dd978118e25052af528071Rusty Russell if (!cpumask_empty(¤t->cpus_allowed) && 1694cbe31f02f5b5536f17dd978118e25052af528071Rusty Russell !cpumask_full(¤t->cpus_allowed)) { 1695f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan int ncpus = num_online_cpus(), curcpu = -1, nset = 0; 16967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ncpus; i++) 1697cbe31f02f5b5536f17dd978118e25052af528071Rusty Russell if (cpumask_test_cpu(i, ¤t->cpus_allowed)) { 16987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] affinity set for " 1699f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan "cpu %d/%d\n", current->comm, 1700f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan current->pid, i, ncpus); 17017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan curcpu = i; 1702f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan nset++; 17037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1704f0810daf74c564a3615eba5002cc11c21a0949baBryan O'Sullivan if (curcpu != -1 && nset != ncpus) { 17057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (npresent) { 17067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit = curcpu / (ncpus / npresent); 1707c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage ipath_cdbg(PROC,"%s[%u] %d chips, %d cpus, " 17087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%d cpus/chip, select unit %d\n", 17097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, 17107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan npresent, ncpus, ncpus / npresent, 17117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit); 17127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 17177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * user ports start at 1, kernel port is 0 17187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * For now, we do round-robin access across all chips 17197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 17207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (prefunit != -1) 17227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan devmax = prefunit + 1; 17237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanrecheck: 17247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 1; i < maxofallports; i++) { 17257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (ndev = prefunit != -1 ? prefunit : 0; ndev < devmax; 17267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ndev++) { 17277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(ndev); 17287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!usable(dd)) 17307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; /* can't use this unit */ 17317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (i >= dd->ipath_cfgports) 17327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 17337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Maxed out on users of this unit. Try 17347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * next. 17357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 17367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 17379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = try_alloc_port(dd, i, fp, uinfo); 17387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!ret) 17397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 17407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (npresent) { 17447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (nup == 0) { 17457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENETDOWN; 17467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No ports available (none initialized " 17477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "and ready)\n"); 17487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 17497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (prefunit > 0) { 17507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* if started above 0, retry from 0 */ 17517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, 17527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%s[%u] no ports on prefunit " 17537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%d, clear and re-check\n", 17547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, 17557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit); 17567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan devmax = ipath_count_units(NULL, NULL, 17577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan NULL); 17587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit = -1; 17597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto recheck; 17607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 17627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No ports available\n"); 17637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 17657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENXIO; 17667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No boards found\n"); 17677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 17707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 17717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 17727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int find_shared_port(struct file *fp, 17749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 17759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 17769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int devmax, ndev, i; 17779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret = 0; 17789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan devmax = ipath_count_units(NULL, NULL, NULL); 17809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan for (ndev = 0; ndev < devmax; ndev++) { 17829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(ndev); 17839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17845d1ce03dd335abaef50dc615137cac2a22c5cee0Dave Olson if (!usable(dd)) 17859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan continue; 17869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan for (i = 1; i < dd->ipath_cfgports; i++) { 17879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd = dd->ipath_pd[i]; 17889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Skip ports which are not yet open */ 17909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd || !pd->port_cnt) 17919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan continue; 17929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Skip port if it doesn't match the requested one */ 17939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (pd->port_subport_id != uinfo->spu_subport_id) 17949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan continue; 17959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Verify the sharing process matches the master */ 17969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (pd->port_subport_cnt != uinfo->spu_subport_cnt || 17979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->userversion != uinfo->spu_userversion || 17989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_cnt >= pd->port_subport_cnt) { 17999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 18009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 18019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan port_fp(fp) = pd; 18039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_fp(fp) = pd->port_cnt++; 180440d97692fbfe52ef68fa771d8121394b2210fd67Pavel Emelyanov pd->port_subpid[subport_fp(fp)] = 180540d97692fbfe52ef68fa771d8121394b2210fd67Pavel Emelyanov get_pid(task_pid(current)); 18069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcursor_fp(fp) = 0; 18079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->active_slaves |= 1 << subport_fp(fp); 18089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(PROC, 18099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "%s[%u] %u sharing %s[%u] unit:port %u:%u\n", 18109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan current->comm, current->pid, 18119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_fp(fp), 181240d97692fbfe52ef68fa771d8121394b2210fd67Pavel Emelyanov pd->port_comm, pid_nr(pd->port_pid), 18139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_unit, pd->port_port); 18149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = 1; 18159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 18169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivandone: 18209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 18219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 18229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_open(struct inode *in, struct file *fp) 18247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 1825c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan /* The real work is performed later in ipath_assign_port() */ 18269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan fp->private_data = kzalloc(sizeof(struct ipath_filedata), GFP_KERNEL); 18279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return fp->private_data ? 0 : -ENOMEM; 18289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 18299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1830c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan/* Get port early, so can set affinity prior to memory allocation */ 1831c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivanstatic int ipath_assign_port(struct file *fp, 18329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 18339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 18349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret; 18359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int i_minor; 18360df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage unsigned swmajor, swminor; 18379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Check to be sure we haven't already initialized this file */ 18399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (port_fp(fp)) { 18409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 18419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 18429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* for now, if major version is different, bail */ 18450df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage swmajor = uinfo->spu_userversion >> 16; 18460df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (swmajor != IPATH_USER_SWMAJOR) { 18479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_dbg("User major version %d not same as driver " 18489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "major %d\n", uinfo->spu_userversion >> 16, 18499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan IPATH_USER_SWMAJOR); 18509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENODEV; 18519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 18529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan swminor = uinfo->spu_userversion & 0xffff; 18559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (swminor != IPATH_USER_SWMINOR) 18569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_dbg("User minor version %d not same as driver " 18579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "minor %d\n", swminor, IPATH_USER_SWMINOR); 18587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_lock(&ipath_mutex); 18607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18610df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (ipath_compatible_subports(swmajor, swminor) && 18620df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage uinfo->spu_subport_cnt && 18639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (ret = find_shared_port(fp, uinfo))) { 18649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret > 0) 18659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = 0; 1866124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson goto done_chk_sdma; 18679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18691cfd6e648b5ea21b0d48bf6f18b129e4576557d5Josef Sipek i_minor = iminor(fp->f_path.dentry->d_inode) - IPATH_USER_MINOR_BASE; 18707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "open on dev %lx (minor %d)\n", 18711cfd6e648b5ea21b0d48bf6f18b129e4576557d5Josef Sipek (long)fp->f_path.dentry->d_inode->i_rdev, i_minor); 18727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (i_minor) 18749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = find_free_port(i_minor - 1, fp, uinfo); 18757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else 18769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = find_best_unit(fp, uinfo); 18777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1878124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olsondone_chk_sdma: 1879124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (!ret) { 1880124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct ipath_filedata *fd = fp->private_data; 1881124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson const struct ipath_portdata *pd = fd->pd; 1882124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson const struct ipath_devdata *dd = pd->port_dd; 1883124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 1884124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson fd->pq = ipath_user_sdma_queue_create(&dd->pcidev->dev, 1885124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson dd->ipath_unit, 1886124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson pd->port_port, 1887124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson fd->subport); 1888124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 1889124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (!fd->pq) 1890124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson ret = -ENOMEM; 1891124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson } 1892124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 18937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_unlock(&ipath_mutex); 18949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1895c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivandone: 1896c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan return ret; 1897c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan} 1898c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan 1899c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan 1900c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivanstatic int ipath_do_user_init(struct file *fp, 1901c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan const struct ipath_user_info *uinfo) 1902c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan{ 1903c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan int ret; 1904947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell struct ipath_portdata *pd = port_fp(fp); 1905c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan struct ipath_devdata *dd; 1906c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan u32 head32; 19079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1908947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell /* Subports don't need to initialize anything since master did it. */ 1909947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell if (subport_fp(fp)) { 1910947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell ret = wait_event_interruptible(pd->port_wait, 1911947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell !test_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag)); 1912947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell goto done; 1913947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell } 1914947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell 19159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd = pd->port_dd; 19169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 19179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (uinfo->spu_rcvhdrsize) { 19189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_setrcvhdrsize(dd, uinfo->spu_rcvhdrsize); 19199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret) 19209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 19219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 19229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 19239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* for now we do nothing with rcvhdrcnt: uinfo->spu_rcvhdrcnt */ 19249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1925e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson /* some ports may get extra buffers, calculate that here */ 1926e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson if (pd->port_port <= dd->ipath_ports_extrabuf) 1927e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson pd->port_piocnt = dd->ipath_pbufsport + 1; 1928e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson else 1929e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson pd->port_piocnt = dd->ipath_pbufsport; 1930e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson 19319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* for right now, kernel piobufs are at end, so port 1 is at 0 */ 1932e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson if (pd->port_port <= dd->ipath_ports_extrabuf) 1933e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson pd->port_pio_base = (dd->ipath_pbufsport + 1) 1934e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson * (pd->port_port - 1); 1935e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson else 1936e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson pd->port_pio_base = dd->ipath_ports_extrabuf + 1937e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson dd->ipath_pbufsport * (pd->port_port - 1); 19389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_piobufs = dd->ipath_piobufbase + 1939e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson pd->port_pio_base * dd->ipath_palign; 1940e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson ipath_cdbg(VERBOSE, "piobuf base for port %u is 0x%x, piocnt %u," 1941e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson " first pio %u\n", pd->port_port, pd->port_piobufs, 1942e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson pd->port_piocnt, pd->port_pio_base); 1943e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson ipath_chg_pioavailkernel(dd, pd->port_pio_base, pd->port_piocnt, 0); 19449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 19459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 19469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Now allocate the rcvhdr Q and eager TIDs; skip the TID 19479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * array for time being. If pd->port_port > chip-supported, 19489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * we need to do extra stuff here to handle by handling overflow 19499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * through port 0, someday 19509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 19519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_create_rcvhdrq(dd, pd); 19529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!ret) 19539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_create_user_egr(pd); 19549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret) 19559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 19569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 19579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 19589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * set the eager head register for this port to the current values 19599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * of the tail pointers, since we don't know if they were 19609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * updated on last use of the port. 19619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 19629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan head32 = ipath_read_ureg32(dd, ur_rcvegrindextail, pd->port_port); 19639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_write_ureg(dd, ur_rcvegrindexhead, head32, pd->port_port); 1964755807a296f77ca7c31dc000afdfe1e5172bbf72Dave Olson pd->port_lastrcvhdrqtail = -1; 19659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(VERBOSE, "Wrote port%d egrhead %x from tail regs\n", 19669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, head32); 19679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_tidcursor = 0; /* start at beginning after open */ 196870c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 196970c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* initialize poll variables... */ 197070c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_urgent = 0; 197170c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_urgent_poll = 0; 197270c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones pd->port_hdrqfull_poll = pd->port_hdrqfull; 197370c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones 19749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 19759355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * Now enable the port for receive. 19769355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * For chips that are set to DMA the tail register to memory 19779355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * when they change (and when the update bit transitions from 19789355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * 0 to 1. So for those chips, we turn it off and then back on. 19799355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * This will (very briefly) affect any other open ports, but the 19809355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * duration is very short, and therefore isn't an issue. We 19819355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * explictly set the in-memory tail copy to 0 beforehand, so we 19829355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * don't have to wait to be sure the DMA update has happened 19839355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell * (chip resets head/tail to 0 on transition to enable). 19849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 1985d8274869d742c3d8082e1428de47e54d12104928Dave Olson set_bit(dd->ipath_r_portenable_shift + pd->port_port, 19869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan &dd->ipath_rcvctrl); 19879355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell if (!(dd->ipath_flags & IPATH_NODMA_RTAIL)) { 19889355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell if (pd->port_rcvhdrtail_kvaddr) 19899355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell ipath_clear_rcvhdrtail(pd); 19909355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 1991d8274869d742c3d8082e1428de47e54d12104928Dave Olson dd->ipath_rcvctrl & 1992d8274869d742c3d8082e1428de47e54d12104928Dave Olson ~(1ULL << dd->ipath_r_tailupd_shift)); 19939355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell } 19949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 19959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_rcvctrl); 1996947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell /* Notify any waiting slaves */ 1997947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell if (pd->port_subport_cnt) { 1998947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell clear_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag); 1999947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell wake_up(&pd->port_wait); 2000947d7617a1d876c2c93f73017a734e070c64d43bRalph Campbell } 20019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivandone: 20027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 20037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 20047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 20067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * unlock_exptid - unlock any expected TID entries port still had in use 20077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: port 20087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 20097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We don't actually update the chip here, because we do a bulk update 20107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * below, using ipath_f_clear_tids. 20117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 20127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void unlock_expected_tids(struct ipath_portdata *pd) 20137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 20147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 20157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int port_tidbase = pd->port_port * dd->ipath_rcvtidcnt; 20167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, cnt = 0, maxtid = port_tidbase + dd->ipath_rcvtidcnt; 20177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port %u unlocking any locked expTID pages\n", 20197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port); 20207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = port_tidbase; i < maxtid; i++) { 20219355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell struct page *ps = dd->ipath_pageshadow[i]; 20229355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell 20239355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell if (!ps) 20247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 20257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20269355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell dd->ipath_pageshadow[i] = NULL; 20271fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pci_unmap_page(dd->pcidev, dd->ipath_physshadow[i], 20281fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PAGE_SIZE, PCI_DMA_FROMDEVICE); 20299355fb6a064723c71e80e9c78de3140b43bfb52dRalph Campbell ipath_release_user_pages_on_close(&ps, 1); 20307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt++; 20317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 20327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 20337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cnt) 20347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port %u locked %u expTID entries\n", 20357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, cnt); 20367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ipath_stats.sps_pagelocks || ipath_stats.sps_pageunlocks) 20387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "%llu pages locked, %llu unlocked\n", 20397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) ipath_stats.sps_pagelocks, 20407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) 20417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks); 20427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 20437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_close(struct inode *in, struct file *fp) 20457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 20467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 20479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_filedata *fd; 20487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 20497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 20503d0890985ac4dff781b7feba19fedda547314749Dave Olson unsigned long flags; 20517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned port; 20523d0890985ac4dff781b7feba19fedda547314749Dave Olson struct pid *pid; 20537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "close on dev %lx, private data %p\n", 20557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (long)in->i_rdev, fp->private_data); 20567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_lock(&ipath_mutex); 20587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 205978e2c6415a50646896d75dedf9f71e54081311faJoe Perches fd = fp->private_data; 20607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan fp->private_data = NULL; 20619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd = fd->pd; 20629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd) { 20639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan mutex_unlock(&ipath_mutex); 20649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 20659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 2066124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2067124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson dd = pd->port_dd; 2068124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2069124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson /* drain user sdma queue */ 2070124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson ipath_user_sdma_queue_drain(dd, fd->pq); 2071124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson ipath_user_sdma_queue_destroy(fd->pq); 2072124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 20739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (--pd->port_cnt) { 20749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 20759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * XXX If the master closes the port before the slave(s), 20769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * revoke the mmap for the eager receive queue so 20779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * the slave(s) don't wait for receive data forever. 20789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 20799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->active_slaves &= ~(1 << fd->subport); 208040d97692fbfe52ef68fa771d8121394b2210fd67Pavel Emelyanov put_pid(pd->port_subpid[fd->subport]); 208140d97692fbfe52ef68fa771d8121394b2210fd67Pavel Emelyanov pd->port_subpid[fd->subport] = NULL; 20829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan mutex_unlock(&ipath_mutex); 20839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 20849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 20853d0890985ac4dff781b7feba19fedda547314749Dave Olson /* early; no interrupt users after this */ 20863d0890985ac4dff781b7feba19fedda547314749Dave Olson spin_lock_irqsave(&dd->ipath_uctxt_lock, flags); 20879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan port = pd->port_port; 20883d0890985ac4dff781b7feba19fedda547314749Dave Olson dd->ipath_pd[port] = NULL; 20893d0890985ac4dff781b7feba19fedda547314749Dave Olson pid = pd->port_pid; 20903d0890985ac4dff781b7feba19fedda547314749Dave Olson pd->port_pid = NULL; 20913d0890985ac4dff781b7feba19fedda547314749Dave Olson spin_unlock_irqrestore(&dd->ipath_uctxt_lock, flags); 20927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_rcvwait_to || pd->port_piowait_to 20947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan || pd->port_rcvnowait || pd->port_pionowait) { 20957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "port%u, %u rcv, %u pio wait timeo; " 20967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%u rcv %u, pio already\n", 20977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, pd->port_rcvwait_to, 20987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_piowait_to, pd->port_rcvnowait, 20997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pionowait); 21007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvwait_to = pd->port_piowait_to = 21017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvnowait = pd->port_pionowait = 0; 21027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_flag) { 2104bb9171448deb1f7ece27674e2e431e4f267fd453Arthur Jones ipath_cdbg(PROC, "port %u port_flag set: 0x%lx\n", 21057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, pd->port_flag); 21067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_flag = 0; 21077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_kregbase) { 211070c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones /* atomically clear receive enable port and intr avail. */ 2111d8274869d742c3d8082e1428de47e54d12104928Dave Olson clear_bit(dd->ipath_r_portenable_shift + port, 211235783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan &dd->ipath_rcvctrl); 2113d8274869d742c3d8082e1428de47e54d12104928Dave Olson clear_bit(pd->port_port + dd->ipath_r_intravail_shift, 211470c51da2c4f84317bb13a2b564600afdcebd686fArthur Jones &dd->ipath_rcvctrl); 211535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg( dd, dd->ipath_kregs->kr_rcvctrl, 211635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_rcvctrl); 211735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan /* and read back from chip to be sure that nothing 211835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * else is in flight when we do the rest */ 211935783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan (void)ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); 21207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* clean up the pkeys for this port user */ 21227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_clean_part_key(pd, dd); 212335783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan /* 212435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * be paranoid, and never write 0's to these, just use an 212535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * unused part of the port 0 tail page. Of course, 212635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * rcvhdraddr points to a large chunk of memory, so this 212735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * could still trash things, but at least it won't trash 212835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * page 0, and by disabling the port, it should stop "soon", 212935783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * even if a packet or two is in already in flight after we 213035783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * disabled the port. 213135783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan */ 213235783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg_port(dd, 213335783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_kregs->kr_rcvhdrtailaddr, port, 213435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_dummy_hdrq_phys); 213535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdraddr, 213635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan pd->port_port, dd->ipath_dummy_hdrq_phys); 213735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan 2138e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson ipath_disarm_piobufs(dd, pd->port_pio_base, pd->port_piocnt); 2139e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson ipath_chg_pioavailkernel(dd, pd->port_pio_base, 2140e2ab41cae418108f376ad1634d7507f56379f7a2Dave Olson pd->port_piocnt, 1); 214135783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan 21421fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_f_clear_tids(dd, pd->port_port); 21431fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan 214435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan if (dd->ipath_pageshadow) 214535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan unlock_expected_tids(pd); 214635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_stats.sps_ports--; 214735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] closed port %u:%u\n", 21483d0890985ac4dff781b7feba19fedda547314749Dave Olson pd->port_comm, pid_nr(pid), 214935783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_unit, port); 21507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21523d0890985ac4dff781b7feba19fedda547314749Dave Olson put_pid(pid); 21537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_unlock(&ipath_mutex); 2154f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ipath_free_pddata(dd, pd); /* after releasing the mutex */ 21557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 21579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(fd); 21587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 21597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 21607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_port_info(struct ipath_portdata *pd, u16 subport, 21627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_port_info __user *uinfo) 21637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 21647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_port_info info; 21657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int nup; 21667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 21679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t sz; 21687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void) ipath_count_units(NULL, &nup, NULL); 21707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.num_active = nup; 21717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.unit = pd->port_dd->ipath_unit; 21727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.port = pd->port_port; 21739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan info.subport = subport; 21749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Don't return new fields if old library opened the port. */ 21750df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage if (ipath_supports_subports(pd->userversion >> 16, 21760df6291c8af2778d05f278d5738eef2c8fafa2ddMark Debbage pd->userversion & 0xffff)) { 21779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Number of user ports available for this device. */ 21789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan info.num_ports = pd->port_dd->ipath_cfgports - 1; 21799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan info.num_subports = pd->port_subport_cnt; 21809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan sz = sizeof(info); 21819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else 21829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan sz = sizeof(info) - 2 * sizeof(u16); 21837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (copy_to_user(uinfo, &info, sz)) { 21857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 21867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 21877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 21897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 21917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 21927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 21937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_get_slave_info(struct ipath_portdata *pd, 21959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan void __user *slave_mask_addr) 21969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 21979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret = 0; 21989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 21999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (copy_to_user(slave_mask_addr, &pd->active_slaves, sizeof(u32))) 22009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EFAULT; 22019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 22029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 22039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 2204124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olsonstatic int ipath_sdma_get_inflight(struct ipath_user_sdma_queue *pq, 2205124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson u32 __user *inflightp) 2206124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson{ 2207124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson const u32 val = ipath_user_sdma_inflight_counter(pq); 2208124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2209124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (put_user(val, inflightp)) 2210124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return -EFAULT; 2211124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2212124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return 0; 2213124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson} 2214124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2215124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olsonstatic int ipath_sdma_get_complete(struct ipath_devdata *dd, 2216124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct ipath_user_sdma_queue *pq, 2217124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson u32 __user *completep) 2218124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson{ 2219124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson u32 val; 2220124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson int err; 2221124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2222124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson err = ipath_user_sdma_make_progress(dd, pq); 2223124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (err < 0) 2224124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return err; 2225124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2226124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson val = ipath_user_sdma_complete_counter(pq); 2227124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (put_user(val, completep)) 2228124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return -EFAULT; 2229124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2230124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return 0; 2231124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson} 2232124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 22337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic ssize_t ipath_write(struct file *fp, const char __user *data, 22347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t count, loff_t *off) 22357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 22367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_cmd __user *ucmd; 22377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 22387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const void __user *src; 22397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t consumed, copy; 22407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_cmd cmd; 22417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ssize_t ret = 0; 22427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan void *dest; 22437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (count < sizeof(cmd.type)) { 22457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 22467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 22477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 22487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ucmd = (const struct ipath_cmd __user *) data; 22507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_from_user(&cmd.type, &ucmd->type, sizeof(cmd.type))) { 22527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 22537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 22547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 22557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan consumed = sizeof(cmd.type); 22577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan switch (cmd.type) { 2259c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case IPATH_CMD_ASSIGN_PORT: 2260c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case __IPATH_CMD_USER_INIT: 22617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_USER_INIT: 22627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.user_info); 22637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.user_info; 22647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.user_info; 22657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_RECV_CTRL: 22677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.recv_ctrl); 22687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.recv_ctrl; 22697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.recv_ctrl; 22707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_PORT_INFO: 22727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.port_info); 22737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.port_info; 22747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.port_info; 22757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_UPDATE: 22777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_FREE: 22787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.tid_info); 22797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.tid_info; 22807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.tid_info; 22817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 22827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_SET_PART_KEY: 22837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.part_key); 22847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.part_key; 22857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.part_key; 22867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 2287c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage case __IPATH_CMD_SLAVE_INFO: 22889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan copy = sizeof(cmd.cmd.slave_mask_addr); 22899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dest = &cmd.cmd.slave_mask_addr; 22909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan src = &ucmd->cmd.slave_mask_addr; 22919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan break; 2292569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones case IPATH_CMD_PIOAVAILUPD: // force an update of PIOAvail reg 2293569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones copy = 0; 2294569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones src = NULL; 2295569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones dest = NULL; 2296569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones break; 2297f2d042313e420002b06715675963cfab48ed2597Robert Walsh case IPATH_CMD_POLL_TYPE: 2298f2d042313e420002b06715675963cfab48ed2597Robert Walsh copy = sizeof(cmd.cmd.poll_type); 2299f2d042313e420002b06715675963cfab48ed2597Robert Walsh dest = &cmd.cmd.poll_type; 2300f2d042313e420002b06715675963cfab48ed2597Robert Walsh src = &ucmd->cmd.poll_type; 2301f2d042313e420002b06715675963cfab48ed2597Robert Walsh break; 23026ac50727bda29e961385e4c40318dadbb5730193Dave Olson case IPATH_CMD_ARMLAUNCH_CTRL: 23036ac50727bda29e961385e4c40318dadbb5730193Dave Olson copy = sizeof(cmd.cmd.armlaunch_ctrl); 23046ac50727bda29e961385e4c40318dadbb5730193Dave Olson dest = &cmd.cmd.armlaunch_ctrl; 23056ac50727bda29e961385e4c40318dadbb5730193Dave Olson src = &ucmd->cmd.armlaunch_ctrl; 23066ac50727bda29e961385e4c40318dadbb5730193Dave Olson break; 2307124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson case IPATH_CMD_SDMA_INFLIGHT: 2308124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson copy = sizeof(cmd.cmd.sdma_inflight); 2309124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson dest = &cmd.cmd.sdma_inflight; 2310124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson src = &ucmd->cmd.sdma_inflight; 2311124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson break; 2312124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson case IPATH_CMD_SDMA_COMPLETE: 2313124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson copy = sizeof(cmd.cmd.sdma_complete); 2314124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson dest = &cmd.cmd.sdma_complete; 2315124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson src = &ucmd->cmd.sdma_complete; 2316124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson break; 23177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan default: 23187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 23197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 23207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 23217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2322569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones if (copy) { 2323569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones if ((count - consumed) < copy) { 2324569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones ret = -EINVAL; 2325569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones goto bail; 2326569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones } 23277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2328569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones if (copy_from_user(dest, src, copy)) { 2329569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones ret = -EFAULT; 2330569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones goto bail; 2331569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones } 2332569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones 2333569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones consumed += copy; 23347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 23357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 2337c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan if (!pd && cmd.type != __IPATH_CMD_USER_INIT && 2338c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan cmd.type != IPATH_CMD_ASSIGN_PORT) { 23399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 23409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 23419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 23427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan switch (cmd.type) { 2344c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case IPATH_CMD_ASSIGN_PORT: 2345c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan ret = ipath_assign_port(fp, &cmd.cmd.user_info); 2346c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan if (ret) 2347c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan goto bail; 2348c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan break; 2349c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case __IPATH_CMD_USER_INIT: 2350c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan /* backwards compatibility, get port first */ 2351c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan ret = ipath_assign_port(fp, &cmd.cmd.user_info); 2352c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan if (ret) 2353c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan goto bail; 2354c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan /* and fall through to current version. */ 23557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_USER_INIT: 23569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_do_user_init(fp, &cmd.cmd.user_info); 23579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret) 23587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 23597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_get_base_info( 23609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan fp, (void __user *) (unsigned long) 23617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cmd.cmd.user_info.spu_base_info, 23627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cmd.cmd.user_info.spu_base_info_size); 23637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 23647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_RECV_CTRL: 23659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_manage_rcvq(pd, subport_fp(fp), cmd.cmd.recv_ctrl); 23667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 23677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_PORT_INFO: 23689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_port_info(pd, subport_fp(fp), 23697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (struct ipath_port_info __user *) 23707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) cmd.cmd.port_info); 23717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 23727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_UPDATE: 23739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_tid_update(pd, fp, &cmd.cmd.tid_info); 23747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 23757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_FREE: 23769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_tid_free(pd, subport_fp(fp), &cmd.cmd.tid_info); 23777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 23787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_SET_PART_KEY: 23797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_set_part_key(pd, cmd.cmd.part_key); 23807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 2381c7e29ff11f23ec78b3caf691789c2b791bb596bfMark Debbage case __IPATH_CMD_SLAVE_INFO: 23829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_get_slave_info(pd, 23839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (void __user *) (unsigned long) 23849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan cmd.cmd.slave_mask_addr); 23859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan break; 2386569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones case IPATH_CMD_PIOAVAILUPD: 2387c4b4d16e090e1b68d1d4d20a28757070982b9725Ralph Campbell ipath_force_pio_avail_update(pd->port_dd); 2388569b87b47f906d65ee35d6ecc4767f20a6390b9bArthur Jones break; 2389f2d042313e420002b06715675963cfab48ed2597Robert Walsh case IPATH_CMD_POLL_TYPE: 2390f2d042313e420002b06715675963cfab48ed2597Robert Walsh pd->poll_type = cmd.cmd.poll_type; 2391f2d042313e420002b06715675963cfab48ed2597Robert Walsh break; 23926ac50727bda29e961385e4c40318dadbb5730193Dave Olson case IPATH_CMD_ARMLAUNCH_CTRL: 23936ac50727bda29e961385e4c40318dadbb5730193Dave Olson if (cmd.cmd.armlaunch_ctrl) 23946ac50727bda29e961385e4c40318dadbb5730193Dave Olson ipath_enable_armlaunch(pd->port_dd); 23956ac50727bda29e961385e4c40318dadbb5730193Dave Olson else 23966ac50727bda29e961385e4c40318dadbb5730193Dave Olson ipath_disable_armlaunch(pd->port_dd); 23976ac50727bda29e961385e4c40318dadbb5730193Dave Olson break; 2398124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson case IPATH_CMD_SDMA_INFLIGHT: 2399124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson ret = ipath_sdma_get_inflight(user_sdma_queue_fp(fp), 2400124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson (u32 __user *) (unsigned long) 2401124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson cmd.cmd.sdma_inflight); 2402124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson break; 2403124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson case IPATH_CMD_SDMA_COMPLETE: 2404124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson ret = ipath_sdma_get_complete(pd->port_dd, 2405124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson user_sdma_queue_fp(fp), 2406124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson (u32 __user *) (unsigned long) 2407124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson cmd.cmd.sdma_complete); 2408124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson break; 24097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret >= 0) 24127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = consumed; 24137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 24157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 24167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 24177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2418124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olsonstatic ssize_t ipath_writev(struct kiocb *iocb, const struct iovec *iov, 2419124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson unsigned long dim, loff_t off) 2420124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson{ 2421124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct file *filp = iocb->ki_filp; 2422124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct ipath_filedata *fp = filp->private_data; 2423124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct ipath_portdata *pd = port_fp(filp); 2424124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson struct ipath_user_sdma_queue *pq = fp->pq; 2425124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2426124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson if (!dim) 2427124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return -EINVAL; 2428124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 2429124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson return ipath_user_sdma_writev(pd->port_dd, pq, iov, dim); 2430124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson} 2431124b4dcb1dd3a6fb80051f1785117a732d785f70Dave Olson 24327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct class *ipath_class; 24337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24342b8693c0617e972fc0b2fd1ebf8de97e15b656c3Arjan van de Venstatic int init_cdev(int minor, char *name, const struct file_operations *fops, 2435f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones struct cdev **cdevp, struct device **devp) 24367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 24377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const dev_t dev = MKDEV(IPATH_MAJOR, minor); 24387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct cdev *cdev = NULL; 2439f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones struct device *device = NULL; 24407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 24417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev = cdev_alloc(); 24437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cdev) { 24447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME 24457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ": Could not allocate cdev for minor %d, %s\n", 24467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name); 24477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 24487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 24497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev->owner = THIS_MODULE; 24527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev->ops = fops; 24537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kobject_set_name(&cdev->kobj, name); 24547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = cdev_add(cdev, dev, 1); 24567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 24577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME 24587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ": Could not add cdev for minor %d, %s (err %d)\n", 24597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name, -ret); 24607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto err_cdev; 24617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 246391bd418fdc8526ee70a0e8f7970b584c8870ae10Greg Kroah-Hartman device = device_create(ipath_class, NULL, dev, NULL, name); 24647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2465f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones if (IS_ERR(device)) { 2466f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones ret = PTR_ERR(device); 24677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not create " 2468f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones "device for minor %d, %s (err %d)\n", 24697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name, -ret); 24707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto err_cdev; 24717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 24747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanerr_cdev: 24767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev_del(cdev); 24777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev = NULL; 24787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 24807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret >= 0) { 24817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = cdev; 2482f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones *devp = device; 24837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 24847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = NULL; 2485f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones *devp = NULL; 24867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 24877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 24897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 24907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24912b8693c0617e972fc0b2fd1ebf8de97e15b656c3Arjan van de Venint ipath_cdev_init(int minor, char *name, const struct file_operations *fops, 2492f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones struct cdev **cdevp, struct device **devp) 24937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 2494f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones return init_cdev(minor, name, fops, cdevp, devp); 24957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 24967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 24977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void cleanup_cdev(struct cdev **cdevp, 2498f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones struct device **devp) 24997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 2500f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones struct device *dev = *devp; 25017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2502f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones if (dev) { 2503f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones device_unregister(dev); 2504f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones *devp = NULL; 25057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (*cdevp) { 25087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev_del(*cdevp); 25097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = NULL; 25107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 25127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanvoid ipath_cdev_cleanup(struct cdev **cdevp, 2514f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones struct device **devp) 25157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 2516f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones cleanup_cdev(cdevp, devp); 25177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 25187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct cdev *wildcard_cdev; 2520f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jonesstatic struct device *wildcard_dev; 25217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic const dev_t dev = MKDEV(IPATH_MAJOR, 0); 25237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int user_init(void) 25257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 25267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 25277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = register_chrdev_region(dev, IPATH_NMINORS, IPATH_DRV_NAME); 25297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 25307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not register " 25317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "chrdev region (err %d)\n", -ret); 25327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 25337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_class = class_create(THIS_MODULE, IPATH_DRV_NAME); 25367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (IS_ERR(ipath_class)) { 25387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = PTR_ERR(ipath_class); 25397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not create " 25407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "device class (err %d)\n", -ret); 25417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 25427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 25457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 25467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unregister_chrdev_region(dev, IPATH_NMINORS); 25477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 25487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 25497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 25507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void user_cleanup(void) 25527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 25537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ipath_class) { 25547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan class_destroy(ipath_class); 25557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_class = NULL; 25567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unregister_chrdev_region(dev, IPATH_NMINORS); 25597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 25607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic atomic_t user_count = ATOMIC_INIT(0); 25627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic atomic_t user_setup = ATOMIC_INIT(0); 25637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanint ipath_user_add(struct ipath_devdata *dd) 25657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 25667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan char name[10]; 25677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 25687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_inc_return(&user_count) == 1) { 25707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = user_init(); 25717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 25727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Unable to set up user support: " 25737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "error %d\n", -ret); 25747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 25757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = init_cdev(0, "ipath", &ipath_file_ops, &wildcard_cdev, 2577f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones &wildcard_dev); 25787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 25797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Could not create wildcard " 25807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "minor: error %d\n", -ret); 25810fd41363e0785247b7c19127318abc8b5eacc86bBryan O'Sullivan goto bail_user; 25827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_set(&user_setup, 1); 25857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 25867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan snprintf(name, sizeof(name), "ipath%d", dd->ipath_unit); 25887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = init_cdev(dd->ipath_unit + 1, name, &ipath_file_ops, 2590f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones &dd->user_cdev, &dd->user_dev); 25917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 25927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Could not create user minor %d, %s\n", 25937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_unit + 1, name); 25947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 25967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 25970fd41363e0785247b7c19127318abc8b5eacc86bBryan O'Sullivanbail_user: 25987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan user_cleanup(); 25997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 26007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 26017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 26027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2603a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivanvoid ipath_user_remove(struct ipath_devdata *dd) 26047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 2605f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones cleanup_cdev(&dd->user_cdev, &dd->user_dev); 26067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 26077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_dec_return(&user_count) == 0) { 26087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_read(&user_setup) == 0) 26097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 26107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2611f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones cleanup_cdev(&wildcard_cdev, &wildcard_dev); 26127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan user_cleanup(); 26137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 26147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_set(&user_setup, 0); 26157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 26167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 26177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return; 26187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 2619