ipath_file_ops.c revision 2b8693c0617e972fc0b2fd1ebf8de97e15b656c3
17f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/* 2759d57686dab8169ca68bbf938ce8e965d1e107aBryan O'Sullivan * Copyright (c) 2006 QLogic, Inc. All rights reserved. 37f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved. 47f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 57f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This software is available to you under a choice of one of two 67f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * licenses. You may choose to be licensed under the terms of the GNU 77f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * General Public License (GPL) Version 2, available from the file 87f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * COPYING in the main directory of this source tree, or the 97f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * OpenIB.org BSD license below: 107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Redistribution and use in source and binary forms, with or 127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * without modification, are permitted provided that the following 137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * conditions are met: 147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * - Redistributions of source code must retain the above 167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * copyright notice, this list of conditions and the following 177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * disclaimer. 187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * - Redistributions in binary form must reproduce the above 207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * copyright notice, this list of conditions and the following 217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * disclaimer in the documentation and/or other materials 227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * provided with the distribution. 237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * SOFTWARE. 327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/pci.h> 357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/poll.h> 367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/cdev.h> 377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/swap.h> 387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <linux/vmalloc.h> 397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include <asm/pgtable.h> 407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include "ipath_kernel.h" 4227b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan#include "ipath_common.h" 437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan/* 459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * mmap64 doesn't allow all 64 bits for 32-bit applications 469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * so only use the low 43 bits. 479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan#define MMAP64_MASK 0x7FFFFFFFFFFUL 499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan 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 *); 547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic unsigned int ipath_poll(struct file *, struct poll_table_struct *); 557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_mmap(struct file *, struct vm_area_struct *); 567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 572b8693c0617e972fc0b2fd1ebf8de97e15b656c3Arjan van de Venstatic const struct file_operations ipath_file_ops = { 587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .owner = THIS_MODULE, 597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .write = ipath_write, 607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .open = ipath_open, 617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .release = ipath_close, 627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .poll = ipath_poll, 637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .mmap = ipath_mmap 647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan}; 657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_get_base_info(struct file *fp, 677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan void __user *ubase, size_t ubase_size) 687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd = port_fp(fp); 707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_base_info *kinfo = NULL; 727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned subport_cnt; 749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int shared, master; 759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t sz; 769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_cnt = pd->port_subport_cnt; 789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!subport_cnt) { 799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan shared = 0; 809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan master = 0; 819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_cnt = 1; 829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan shared = 1; 849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan master = !subport_fp(fp); 859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan sz = sizeof(*kinfo); 889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* If port sharing is not requested, allow the old size structure */ 899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!shared) 909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan sz -= 3 * sizeof(u64); 919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ubase_size < sz) { 927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, 939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "Base size %zu, need %zu (version mismatch?)\n", 949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ubase_size, sz); 957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo = kzalloc(sizeof(*kinfo), GFP_KERNEL); 1007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (kinfo == NULL) { 1017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 1027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 1037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = dd->ipath_f_get_base_info(pd, kinfo); 1067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 1077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 1087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdr_cnt = dd->ipath_rcvhdrcnt; 1107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdrent_size = dd->ipath_rcvhdrentsize; 1117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_tidegrcnt = dd->ipath_rcvegrcnt; 1127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbufsize = dd->ipath_rcvegrbufsize; 1137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * have to mmap whole thing 1157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbuftotlen = 1177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size; 1187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrperchunk = pd->port_rcvegrbufs_perchunk; 1197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrchunksize = kinfo->spi_rcv_egrbuftotlen / 1207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_chunks; 1219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_tidcnt = dd->ipath_rcvtidcnt / subport_cnt; 1229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (master) 1239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_tidcnt += dd->ipath_rcvtidcnt % subport_cnt; 1247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for this use, may be ipath_cfgports summed over all chips that 1267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * are are configured and present 1277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_nports = dd->ipath_cfgports; 1297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* unit (chip/board) our port is on */ 1307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_unit = dd->ipath_unit; 1317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for now, only a single page */ 1327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_tid_maxsize = PAGE_SIZE; 1337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Doing this per port, and based on the skip value, etc. This has 1367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * to be the actual buffer size, since the protocol code treats it 1377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * as an array. 1387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 1397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * These have to be set to user addresses in the user code via mmap. 1407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * These values are used on return to user code for the mmap target 1417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * addresses only. For 32 bit, same 44 bit address problem, so use 1427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the physical address, not virtual. Before 2.6.11, using the 1437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * page_address() macro worked, but in 2.6.11, even that returns the 1447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * full 64 bit address (upper bits all 1's). So far, using the 1457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * physical addresses (or chip offsets, for chip mapping) works, but 1469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * no doubt some future kernel release will change that, and we'll be 1479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * on to yet another method of dealing with this. 1487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdr_base = (u64) pd->port_rcvhdrq_phys; 1509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_rcvhdr_tailaddr = (u64) pd->port_rcvhdrqtailaddr_phys; 1517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbufs = (u64) pd->port_rcvegr_phys; 1527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_pioavailaddr = (u64) dd->ipath_pioavailregs_phys; 1537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_status = (u64) kinfo->spi_pioavailaddr + 1547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) dd->ipath_statusp - 1557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) dd->ipath_pioavailregs_dma; 1569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!shared) { 1579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piocnt = dd->ipath_pbufsport; 1589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piobufbase = (u64) pd->port_piobufs; 1599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->__spi_uregbase = (u64) dd->ipath_uregbase + 1609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign * pd->port_port; 1619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (master) { 1629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piocnt = (dd->ipath_pbufsport / subport_cnt) + 1639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_pbufsport % subport_cnt); 1649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Master's PIO buffers are after all the slave's */ 1659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piobufbase = (u64) pd->port_piobufs + 1669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign * 1679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_pbufsport - kinfo->spi_piocnt); 1689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->__spi_uregbase = (u64) dd->ipath_uregbase + 1699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign * pd->port_port; 1709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 1719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned slave = subport_fp(fp) - 1; 1727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piocnt = dd->ipath_pbufsport / subport_cnt; 1749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_piobufbase = (u64) pd->port_piobufs + 1759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign * kinfo->spi_piocnt * slave; 1769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->__spi_uregbase = ((u64) pd->subport_uregbase + 1779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan PAGE_SIZE * slave) & MMAP64_MASK; 1789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_rcvhdr_base = ((u64) pd->subport_rcvhdr_base + 1809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvhdrq_size * slave) & MMAP64_MASK; 1819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_rcvhdr_tailaddr = 1829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (u64) pd->port_rcvhdrqtailaddr_phys & MMAP64_MASK; 1839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_rcv_egrbufs = ((u64) pd->subport_rcvegrbuf + 1849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_rcvegrcnt * dd->ipath_rcvegrbufsize * slave) & 1859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan MMAP64_MASK; 1869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 1879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_pioindex = (kinfo->spi_piobufbase - dd->ipath_piobufbase) / 1899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign; 1907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_pioalign = dd->ipath_palign; 1917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_qpair = IPATH_KD_QP; 1937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_piosize = dd->ipath_ibmaxlen; 1947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_mtu = dd->ipath_ibmaxlen; /* maxlen, not ibmtu */ 1957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_port = pd->port_port; 1969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_subport = subport_fp(fp); 197eaf6733bc176742fb08def2269441684e963c275Bryan O'Sullivan kinfo->spi_sw_version = IPATH_KERN_SWVERSION; 1987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_hw_version = dd->ipath_revision; 1997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (master) { 2019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_runtime_flags |= IPATH_RUNTIME_MASTER; 2029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_subport_uregbase = 2039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (u64) pd->subport_uregbase & MMAP64_MASK; 2049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_subport_rcvegrbuf = 2059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (u64) pd->subport_rcvegrbuf & MMAP64_MASK; 2069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kinfo->spi_subport_rcvhdr_base = 2079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (u64) pd->subport_rcvhdr_base & MMAP64_MASK; 2089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(PROC, "port %u flags %x %llx %llx %llx\n", 2090624b072f230af4f24c112019b04f898ef7b4e2cBryan O'Sullivan kinfo->spi_port, kinfo->spi_runtime_flags, 2100624b072f230af4f24c112019b04f898ef7b4e2cBryan O'Sullivan (unsigned long long) kinfo->spi_subport_uregbase, 2110624b072f230af4f24c112019b04f898ef7b4e2cBryan O'Sullivan (unsigned long long) kinfo->spi_subport_rcvegrbuf, 2120624b072f230af4f24c112019b04f898ef7b4e2cBryan O'Sullivan (unsigned long long) kinfo->spi_subport_rcvhdr_base); 2139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 2149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 2157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user(ubase, kinfo, sizeof(*kinfo))) 2167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 2177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 2197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kfree(kinfo); 2207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 2217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 2227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 2247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_tid_update - update a port TID 2257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 2269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * @fp: the ipath device file 2277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @ti: the TID information 2287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * The new implementation as of Oct 2004 is that the driver assigns 2307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the tid and returns it to the caller. To make it easier to 2317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * catch bugs, and to reduce search time, we keep a cursor for 2327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * each port, walking the shadow tid array to find one that's not 2337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in use. 2347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * For now, if we can't allocate the full list, we fail, although 2367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in the long run, we'll allocate as many as we can, and the 2377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * caller will deal with that by trying the remaining pages later. 2387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * That means that when we fail, we have to mark the tids as not in 2397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * use again, in our shadow copy. 2407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * It's up to the caller to free the tids when they are done. 2427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We'll unlock the pages as they free them. 2437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 2447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Also, right now we are locking one page at a time, but since 2457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the intended use of this routine is for a single group of 2467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * virtually contiguous pages, that should change to improve 2477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * performance. 2487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 2499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_tid_update(struct ipath_portdata *pd, struct file *fp, 2507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_tid_info *ti) 2517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 2527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0, ntids; 2539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan u32 tid, porttid, cnt, i, tidcnt, tidoff; 2547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u16 *tidlist; 2557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 2567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 physaddr; 2577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long vaddr; 2587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 __iomem *tidbase; 2597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long tidmap[8]; 2607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct page **pagep = NULL; 2619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned subport = subport_fp(fp); 2627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow) { 2647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 2657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 2667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt = ti->tidcnt; 2697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cnt) { 2707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("After copyin, tidcnt 0, tidlist %llx\n", 2717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) ti->tidlist); 2727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 2737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Should we treat as success? likely a bug 2747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 2757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 2767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 2777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid = pd->port_port * dd->ipath_rcvtidcnt; 2799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) { 2809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt; 2819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tid = pd->port_tidcursor; 2829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidoff = 0; 2839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (!subport) { 2849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) + 2859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_rcvtidcnt % pd->port_subport_cnt); 2869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidoff = dd->ipath_rcvtidcnt - tidcnt; 2879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += tidoff; 2889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tid = tidcursor_fp(fp); 2899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 2909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt; 2919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidoff = tidcnt * (subport - 1); 2929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += tidoff; 2939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tid = tidcursor_fp(fp); 2949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 2959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (cnt > tidcnt) { 2967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* make sure it all fits in port_tid_pg_list */ 2977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "Process tried to allocate %u " 2987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "TIDs, only trying max (%u)\n", cnt, tidcnt); 2997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt = tidcnt; 3007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pagep = &((struct page **) pd->port_tid_pg_list)[tidoff]; 3029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidlist = &((u16 *) &pagep[dd->ipath_rcvtidcnt])[tidoff]; 3037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan memset(tidmap, 0, sizeof(tidmap)); 3057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* before decrement; chip actual # */ 3067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ntids = tidcnt; 3077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidbase = (u64 __iomem *) (((char __iomem *) dd->ipath_kregbase) + 3087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidbase + 3097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid * sizeof(*tidbase)); 3107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port%u %u tids, cursor %u, tidbase %p\n", 3127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, cnt, tid, tidbase); 3137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* virtual address of first page in transfer */ 3157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vaddr = ti->tidvaddr; 3167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!access_ok(VERIFY_WRITE, (void __user *) vaddr, 3177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt * PAGE_SIZE)) { 3187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Fail vaddr %p, %u pages, !access_ok\n", 3197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *)vaddr, cnt); 3207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 3217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_get_user_pages(vaddr, cnt, pagep); 3247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) { 3257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret == -EBUSY) { 3267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to lock addr %p, %u pages " 3277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(already locked)\n", 3287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) vaddr, cnt); 3297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 3307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for now, continue, and see what happens but with 3317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the new implementation, this should never happen, 3327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * unless perhaps the user has mpin'ed the pages 3337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * themselves (something we need to test) 3347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 3367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 3377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 3387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "Failed to lock addr %p, %u pages: " 3397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "errno %d\n", (void *) vaddr, cnt, -ret); 3407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < cnt; i++, vaddr += PAGE_SIZE) { 3447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (; ntids--; tid++) { 3457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (tid == tidcnt) 3467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = 0; 3477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow[porttid + tid]) 3487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 3497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ntids < 0) { 3517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 3527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * oops, wrapped all the way through their TIDs, 3537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * and didn't have enough free; see comments at 3547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * start of routine 3557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Not enough free TIDs for %u pages " 3577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(index %d), failing\n", cnt, i); 3587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan i--; /* last tidlist[i] not filled in */ 3597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 3607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 3617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidlist[i] = tid + tidoff; 3637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Updating idx %u to TID %u, " 3649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "vaddr %lx\n", i, tid + tidoff, vaddr); 3657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* we "know" system pages and TID pages are same size */ 3667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[porttid + tid] = pagep[i]; 3671fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_physshadow[porttid + tid] = ipath_map_page( 3681fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->pcidev, pagep[i], 0, PAGE_SIZE, 3691fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PCI_DMA_FROMDEVICE); 3707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 3717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * don't need atomic or it's overhead 3727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan __set_bit(tid, tidmap); 3741fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan physaddr = dd->ipath_physshadow[porttid + tid]; 3757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pagelocks++; 3767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, 3777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "TID %u, vaddr %lx, physaddr %llx pgp %p\n", 3787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid, vaddr, (unsigned long long) physaddr, 3797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pagep[i]); 3807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_f_put_tid(dd, &tidbase[tid], 1, physaddr); 3817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 3827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * don't check this tid in ipath_portshadow, since we 3837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * just filled it in; start with the next one. 3847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid++; 3867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) { 3897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 limit; 3907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cleanup: 3917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* jump here if copy out of updated info failed... */ 3927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("After failure (ret=%d), undo %d of %d entries\n", 3937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan -ret, i, cnt); 3947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* same code that's in ipath_free_tid() */ 3957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = sizeof(tidmap) * BITS_PER_BYTE; 3967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (limit > tidcnt) 3977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* just in case size changes in future */ 3987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = tidcnt; 3997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = find_first_bit((const unsigned long *)tidmap, limit); 4007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (; tid < limit; tid++) { 4017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!test_bit(tid, tidmap)) 4027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 4037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pageshadow[porttid + tid]) { 4047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Freeing TID %u\n", 4057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid); 4067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_f_put_tid(dd, &tidbase[tid], 1, 4077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_tidinvalid); 4081fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pci_unmap_page(dd->pcidev, 4091fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_physshadow[porttid + tid], 4101fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PAGE_SIZE, PCI_DMA_FROMDEVICE); 4117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[porttid + tid] = NULL; 4127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 4137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_release_user_pages(pagep, cnt); 4167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 4177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 4187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Copy the updated array, with ipath_tid's filled in, back 4197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * to user. Since we did the copy in already, this "should 4207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * never fail" If it does, we have to clean up... 4217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user((void __user *) 4237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) ti->tidlist, 4247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidlist, cnt * sizeof(*tidlist))) { 4257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 4267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto cleanup; 4277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user((void __user *) (unsigned long) ti->tidmap, 4297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidmap, sizeof tidmap)) { 4307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 4317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto cleanup; 4327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (tid == tidcnt) 4347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = 0; 4359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) 4369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_tidcursor = tid; 4379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else 4389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcursor_fp(fp) = tid; 4397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 4427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 4437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to map %u TID pages, failing with %d\n", 4447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, -ret); 4457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 4467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 4477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 4497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_tid_free - free a port TID 4507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 4519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * @subport: the subport 4527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @ti: the TID info 4537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 4547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * right now we are unlocking one page at a time, but since 4557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the intended use of this routine is for a single group of 4567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * virtually contiguous pages, that should change to improve 4577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * performance. We check that the TID is in range for this port 4587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * but otherwise don't check validity; if user has an error and 4597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * frees the wrong tid, it's only their own data that can thereby 4607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * be corrupted. We do check that the TID was in use, for sanity 4617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We always use our idea of the saved address, not the address that 4627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * they pass in to us. 4637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_tid_free(struct ipath_portdata *pd, unsigned subport, 4667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_tid_info *ti) 4677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 4687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 4697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 tid, porttid, cnt, limit, tidcnt; 4707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 4717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 __iomem *tidbase; 4727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long tidmap[8]; 4737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow) { 4757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 4767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 4777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_from_user(tidmap, (void __user *)(unsigned long)ti->tidmap, 4807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan sizeof tidmap)) { 4817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 4827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 4837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid = pd->port_port * dd->ipath_rcvtidcnt; 4869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) 4879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt; 4889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (!subport) { 4899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) + 4909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_rcvtidcnt % pd->port_subport_cnt); 4919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += dd->ipath_rcvtidcnt - tidcnt; 4929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 4939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt; 4949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan porttid += tidcnt * (subport - 1); 4959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 4967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) + 4977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidbase + 4987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid * sizeof(*tidbase)); 4997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = sizeof(tidmap) * BITS_PER_BYTE; 5017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (limit > tidcnt) 5027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* just in case size changes in future */ 5037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = tidcnt; 5047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = find_first_bit(tidmap, limit); 5057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port%u free %u tids; first bit (max=%d) " 5067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "set is %d, porttid %u\n", pd->port_port, ti->tidcnt, 5077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit, tid, porttid); 5087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (cnt = 0; tid < limit; tid++) { 5097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 5107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * small optimization; if we detect a run of 3 or so without 5117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * any set, use find_first_bit again. That's mainly to 5127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * accelerate the case where we wrapped, so we have some at 5137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the beginning, and some at the end, and a big gap 5147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in the middle. 5157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 5167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!test_bit(tid, tidmap)) 5177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 5187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt++; 5197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pageshadow[porttid + tid]) { 5207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "PID %u freeing TID %u\n", 5217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pid, tid); 5227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_f_put_tid(dd, &tidbase[tid], 1, 5237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_tidinvalid); 5241fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pci_unmap_page(dd->pcidev, 5251fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_physshadow[porttid + tid], 5261fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PAGE_SIZE, PCI_DMA_FROMDEVICE); 5277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_release_user_pages( 5287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_pageshadow[porttid + tid], 1); 5297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[porttid + tid] = NULL; 5307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 5317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else 5327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Unused tid %u, ignoring\n", tid); 5337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cnt != ti->tidcnt) 5357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("passed in tidcnt %d, only %d bits set in map\n", 5367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, cnt); 5377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 5387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 5397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to unmap %u TID pages, failing with %d\n", 5407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, -ret); 5417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 5427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 5437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 5457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_set_part_key - set a partition key 5467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 5477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @key: the key 5487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 5497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We can have up to 4 active at a time (other than the default, which is 5507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * always allowed). This is somewhat tricky, since multiple ports may set 5517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the same key, so we reference count them, and clean up at exit. All 4 5527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * partition keys are packed into a single infinipath register. It's an 5537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * error for a process to set the same pkey multiple times. We provide no 5547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * mechanism to de-allocate a pkey at this time, we may eventually need to 5557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * do that. I've used the atomic operations, and no locking, and only make 5567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * a single pass through what's available. This should be more than 5577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * adequate for some time. I'll think about spinlocks or the like if and as 5587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * it's necessary. 5597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 5607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_set_part_key(struct ipath_portdata *pd, u16 key) 5617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 5627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 5637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, any = 0, pidx = -1; 5647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u16 lkey = key & 0x7FFF; 5657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 5667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 56727b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan if (lkey == (IPATH_DEFAULT_P_KEY & 0x7FFF)) { 5687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* nothing to do; this key always valid */ 5697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 5707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 5717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u try to set pkey %hx, current keys " 5747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%hx:%x %hx:%x %hx:%x %hx:%x\n", 5757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, dd->ipath_pkeys[0], 5767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[0]), dd->ipath_pkeys[1], 5777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[1]), dd->ipath_pkeys[2], 5787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[2]), dd->ipath_pkeys[3], 5797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[3])); 5807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!lkey) { 5827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "p%u tries to set key 0, not allowed\n", 5837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port); 5847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 5857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 5867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 5897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Set the full membership bit, because it has to be 5907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * set in the register or the packet, and it seems 5917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * cleaner to set in the register than to force all 5927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * callers to set it. (see bug 4331) 5937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 5947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan key |= 0x8000; 5957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) { 5977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_pkeys[i] && pidx == -1) 5987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pidx = i; 5997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_pkeys[i] == key) { 6007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u tries to set same pkey " 6017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(%x) more than once\n", 6027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key); 6037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EEXIST; 6047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pidx == -1) { 6087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("All pkeys for port %u already in use, " 6097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 6107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 6117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) { 6147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pkeys[i]) { 6157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan any++; 6167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 6177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pkeys[i] == key) { 6197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_t *pkrefs = &dd->ipath_pkeyrefs[i]; 6207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_inc_return(pkrefs) > 1) { 6227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[pidx] = key; 6237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u set key %x " 6247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "matches #%d, count now %d\n", 6257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, i, 6267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(pkrefs)); 6277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 6287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 6307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 6317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * lost race, decrement count, catch below 6327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_dec(pkrefs); 6347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Lost race, count was " 6357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "0, after dec, it's %d\n", 6367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(pkrefs)); 6377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan any++; 6387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) { 6417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 6427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * It makes no sense to have both the limited and 6437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * full membership PKEY set at the same time since 6447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the unlimited one will disable the limited one. 6457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EEXIST; 6477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!any) { 6517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u, all pkeys already in use, " 6527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 6537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 6547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) { 6577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pkeys[i] && 6587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) { 6597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pkey; 6607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for ipathstats, etc. */ 6627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pkeys[i] = lkey; 6637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[pidx] = dd->ipath_pkeys[i] = key; 6647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pkey = 6657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (u64) dd->ipath_pkeys[0] | 6667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 6677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 6687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 6697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "p%u set key %x in #%d, " 6707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "portidx %d, new pkey reg %llx\n", 6717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, i, pidx, 6727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pkey); 6737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg( 6747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd, dd->ipath_kregs->kr_partitionkey, pkey); 6757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 6777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 6787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u, all pkeys already in use 2nd pass, " 6817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 6827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 6837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 6857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 6867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 6877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 6897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_manage_rcvq - manage a port's receive queue 6907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 6919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * @subport: the subport 6927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @start_stop: action to carry out 6937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 6947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * start_stop == 0 disables receive on the port, for use in queue 6957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * overflow conditions. start_stop==1 re-enables, to be used to 6967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * re-init the software copy of the head register 6977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_manage_rcvq(struct ipath_portdata *pd, unsigned subport, 6999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int start_stop) 7007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 7017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 7027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(PROC, "%sabling rcv for unit %u port %u:%u\n", 7047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan start_stop ? "en" : "dis", dd->ipath_unit, 7059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, subport); 7069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (subport) 7079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 7087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* atomically clear receive enable port. */ 7097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (start_stop) { 7107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 7117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * On enable, force in-memory copy of the tail register to 7127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 0, so that protocol code doesn't have to worry about 7137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * whether or not the chip has yet updated the in-memory 7147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * copy or not on return from the system call. The chip 7157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * always resets it's tail register back to 0 on a 7167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * transition from disabled to enabled. This could cause a 7177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * problem if software was broken, and did the enable w/o 7187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the disable, but eventually the in-memory copy will be 7197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * updated and correct itself, even in the face of software 7207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * bugs. 7217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 7221fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan *(volatile u64 *)pd->port_rcvhdrtail_kvaddr = 0; 7237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan set_bit(INFINIPATH_R_PORTENABLE_SHIFT + pd->port_port, 7247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_rcvctrl); 7257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else 7267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan clear_bit(INFINIPATH_R_PORTENABLE_SHIFT + pd->port_port, 7277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_rcvctrl); 7287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 7297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl); 7307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* now be sure chip saw it before we return */ 73144f8e3f3f7d8e61b4aafced278403955fe18ad88Roland Dreier ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); 7327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (start_stop) { 7337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 7347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * And try to be sure that tail reg update has happened too. 7357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This should in theory interlock with the RXE changes to 7367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the tail register. Don't assign it to the tail register 7377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in memory copy, since we could overwrite an update by the 7387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * chip if we did. 7397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 74044f8e3f3f7d8e61b4aafced278403955fe18ad88Roland Dreier ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); 7417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* always; new head should be equal to new tail; see above */ 7439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 7447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return 0; 7457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 7467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void ipath_clean_part_key(struct ipath_portdata *pd, 7487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd) 7497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 7507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, j, pchanged = 0; 7517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 oldpkey; 7527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for debugging only */ 7547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan oldpkey = (u64) dd->ipath_pkeys[0] | 7557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 7567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 7577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 7587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) { 7607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_pkeys[i]) 7617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 7627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "look for key[%d] %hx in pkeys\n", i, 7637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i]); 7647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (j = 0; j < ARRAY_SIZE(dd->ipath_pkeys); j++) { 7657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* check for match independent of the global bit */ 7667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((dd->ipath_pkeys[j] & 0x7fff) != 7677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (pd->port_pkeys[i] & 0x7fff)) 7687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 7697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_dec_and_test(&dd->ipath_pkeyrefs[j])) { 7707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u clear key " 7717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%x matches #%d\n", 7727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, 7737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i], j); 7747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pkeys[j] = 7757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pkeys[j] = 0; 7767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pchanged++; 7777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else ipath_cdbg( 7797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan VERBOSE, "p%u key %x matches #%d, " 7807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "but ref still %d\n", pd->port_port, 7817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i], j, 7827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[j])); 7837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 7847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i] = 0; 7867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pchanged) { 7887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pkey = (u64) dd->ipath_pkeys[0] | 7897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 7907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 7917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 7927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u old pkey reg %llx, " 7937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "new pkey reg %llx\n", pd->port_port, 7947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) oldpkey, 7957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pkey); 7967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey, 7977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pkey); 7987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 8007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan/* 8029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Initialize the port data with the receive buffer sizes 8039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * so this can be done while the master port is locked. 8049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Otherwise, there is a race with a slave opening the port 8059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * and seeing these fields uninitialized. 8069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 8079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic void init_user_egr_sizes(struct ipath_portdata *pd) 8089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 8099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 8109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned egrperchunk, egrcnt, size; 8119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 8129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 8139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * to avoid wasting a lot of memory, we allocate 32KB chunks of 8149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * physically contiguous memory, advance through it until used up 8159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * and then allocate more. Of course, we need memory to store those 8169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * extra pointers, now. Started out with 256KB, but under heavy 8179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * memory pressure (creating large files and then copying them over 8189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * NFS while doing lots of MPI jobs), we hit some allocation 8199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * failures, even though we can sleep... (2.6.10) Still get 8209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * failures at 64K. 32K is the lowest we can go without wasting 8219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * additional memory. 8229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 8239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = 0x8000; 8249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan egrperchunk = size / dd->ipath_rcvegrbufsize; 8259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan egrcnt = dd->ipath_rcvegrcnt; 8269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf_chunks = (egrcnt + egrperchunk - 1) / egrperchunk; 8279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbufs_perchunk = egrperchunk; 8289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf_size = size; 8299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 8309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 8317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 8327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_create_user_egr - allocate eager TID buffers 8337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port to allocate TID buffers for 8347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 8357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This routine is now quite different for user and kernel, because 8367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the kernel uses skb's, for the accelerated network performance 8377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This is the user port version 8387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 8397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Allocate the eager TID buffers and program them into infinipath 8407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * They are no longer completely contiguous, we do multiple allocation 8417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * calls. 8427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 8437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_create_user_egr(struct ipath_portdata *pd) 8447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 8457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 8469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned e, egrcnt, egrperchunk, chunk, egrsize, egroff; 8477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t size; 8487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 8490ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan gfp_t gfp_flags; 8500ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan 8510ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan /* 8520ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * GFP_USER, but without GFP_FS, so buffer cache can be 8530ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * coalesced (we hope); otherwise, even at order 4, 8540ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * heavy filesystem activity makes these fail, and we can 8550ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * use compound pages. 8560ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan */ 8570ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan gfp_flags = __GFP_WAIT | __GFP_IO | __GFP_COMP; 8587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egrcnt = dd->ipath_rcvegrcnt; 8607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* TID number offset for this port */ 8617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egroff = pd->port_port * egrcnt; 8627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egrsize = dd->ipath_rcvegrbufsize; 8637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Allocating %d egr buffers, at egrtid " 8647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "offset %x, egrsize %u\n", egrcnt, egroff, egrsize); 8657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan chunk = pd->port_rcvegrbuf_chunks; 8679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan egrperchunk = pd->port_rcvegrbufs_perchunk; 8689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = pd->port_rcvegrbuf_size; 8699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf = kmalloc(chunk * sizeof(pd->port_rcvegrbuf[0]), 8709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan GFP_KERNEL); 8717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf) { 8727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 8737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 8747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys = 8769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kmalloc(chunk * sizeof(pd->port_rcvegrbuf_phys[0]), 8779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan GFP_KERNEL); 8787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf_phys) { 8797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 8807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail_rcvegrbuf; 8817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) { 8837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf[e] = dma_alloc_coherent( 8857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->pcidev->dev, size, &pd->port_rcvegrbuf_phys[e], 8867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan gfp_flags); 8877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf[e]) { 8897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 8907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail_rcvegrbuf_phys; 8917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegr_phys = pd->port_rcvegrbuf_phys[0]; 8957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = chunk = 0; chunk < pd->port_rcvegrbuf_chunks; chunk++) { 8977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dma_addr_t pa = pd->port_rcvegrbuf_phys[chunk]; 8987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned i; 8997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; e < egrcnt && i < egrperchunk; e++, i++) { 9017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_f_put_tid(dd, e + egroff + 9027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (u64 __iomem *) 9037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((char __iomem *) 9047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_kregbase + 9057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvegrbase), 0, pa); 9067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pa += egrsize; 9077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cond_resched(); /* don't hog the cpu */ 9097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 9127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 9137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail_rcvegrbuf_phys: 9157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = 0; e < pd->port_rcvegrbuf_chunks && 916f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan pd->port_rcvegrbuf[e]; e++) { 9177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dma_free_coherent(&dd->pcidev->dev, size, 9187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf[e], 9197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys[e]); 9207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 921f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 9229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(pd->port_rcvegrbuf_phys); 9237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys = NULL; 9247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail_rcvegrbuf: 9259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(pd->port_rcvegrbuf); 9267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf = NULL; 9277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 9287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 9297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 9307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 931f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 932f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan/* common code for the mappings on dma_alloc_coherent mem */ 933f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivanstatic int ipath_mmap_mem(struct vm_area_struct *vma, 9341fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan struct ipath_portdata *pd, unsigned len, int write_ok, 9351fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan void *kvaddr, char *what) 936f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan{ 937f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 9381fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan unsigned long pfn; 939f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan int ret; 940f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 941f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > len) { 942f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dev_info(&dd->pcidev->dev, 943f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "FAIL on %s: len %lx > %x\n", what, 944f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_end - vma->vm_start, len); 945f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = -EFAULT; 946f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan goto bail; 947f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 948f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 949f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (!write_ok) { 950f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (vma->vm_flags & VM_WRITE) { 951f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dev_info(&dd->pcidev->dev, 952f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "%s must be mapped readonly\n", what); 953f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = -EPERM; 954f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan goto bail; 955f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 956f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 957f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* don't allow them to later change with mprotect */ 958f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYWRITE; 959f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 960f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 9611fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pfn = virt_to_phys(kvaddr) >> PAGE_SHIFT; 962f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = remap_pfn_range(vma, vma->vm_start, pfn, 963f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan len, vma->vm_page_prot); 964f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (ret) 9651fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dev_info(&dd->pcidev->dev, "%s port%u mmap of %lx, %x " 9661fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan "bytes r%c failed: %d\n", what, pd->port_port, 9671fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pfn, len, write_ok?'w':'o', ret); 968f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan else 9691fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan ipath_cdbg(VERBOSE, "%s port%u mmaped %lx, %x bytes " 9701fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan "r%c\n", what, pd->port_port, pfn, len, 9711fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan write_ok?'w':'o'); 972f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivanbail: 973f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan return ret; 974f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan} 975f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 9767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_ureg(struct vm_area_struct *vma, struct ipath_devdata *dd, 9777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 ureg) 9787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 9797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long phys; 9807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 9817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 982f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* 983f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * This is real hardware, so use io_remap. This is the mechanism 984f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * for the user process to update the head registers for their port 985f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * in the chip. 986f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan */ 9877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > PAGE_SIZE) { 9887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL mmap userreg: reqlen " 9897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%lx > PAGE\n", vma->vm_end - vma->vm_start); 9907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 9917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 9927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys = dd->ipath_physaddr + ureg; 9937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 9947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; 9967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = io_remap_pfn_range(vma, vma->vm_start, 9977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys >> PAGE_SHIFT, 9987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 9997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot); 10007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 10027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 10037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_piobufs(struct vm_area_struct *vma, 10057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd, 10069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd, 10079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned piobufs, unsigned piocnt) 10087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long phys; 10107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 10117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1013f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * When we map the PIO buffers in the chip, we want to map them as 1014f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * writeonly, no read possible. This prevents access to previous 1015f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * process data, and catches users who might try to read the i/o 1016f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * space due to a bug. 10177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 10189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > (piocnt * dd->ipath_palign)) { 10197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL mmap piobufs: " 10207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "reqlen %lx > PAGE\n", 10217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start); 10229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 10237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan phys = dd->ipath_physaddr + piobufs; 1027f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 10287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1029f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * Don't mark this as non-cached, or we don't get the 10307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * write combining behavior we want on the PIO buffers! 10317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 10327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1033eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan#if defined(__powerpc__) 1034eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan /* There isn't a generic way to specify writethrough mappings */ 1035eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; 1036eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) |= _PAGE_WRITETHRU; 1037eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) &= ~_PAGE_GUARDED; 1038eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan#endif 1039eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan 1040367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan /* 1041367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan * don't allow them to later change to readable with mprotect (for when 1042367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan * not initially mapped readable, as is normally the case) 1043367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan */ 1044f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYREAD; 10457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; 10467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = io_remap_pfn_range(vma, vma->vm_start, phys >> PAGE_SHIFT, 10487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 10497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot); 10507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 10517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 10527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 10537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_rcvegrbufs(struct vm_area_struct *vma, 10557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd) 10567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 10587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long start, size; 10597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t total_size, i; 10601fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan unsigned long pfn; 10617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 10627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size = pd->port_rcvegrbuf_size; 10647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan total_size = pd->port_rcvegrbuf_chunks * size; 10657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > total_size) { 10667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL on egr bufs: " 10677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "reqlen %lx > actual %lx\n", 10687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 10697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) total_size); 10709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 10717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (vma->vm_flags & VM_WRITE) { 10757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "Can't map eager buffers as " 10767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "writable (flags=%lx)\n", vma->vm_flags); 10777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EPERM; 10787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1080f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* don't allow them to later change to writeable with mprotect */ 1081f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYWRITE; 10827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan start = vma->vm_start; 10847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < pd->port_rcvegrbuf_chunks; i++, start += size) { 10861fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pfn = virt_to_phys(pd->port_rcvegrbuf[i]) >> PAGE_SHIFT; 10871fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan ret = remap_pfn_range(vma, start, pfn, size, 10881fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan vma->vm_page_prot); 10897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 10907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 10937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 10957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 10967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 10977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan/* 10999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * ipath_file_vma_nopage - handle a VMA page fault. 11009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 11019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic struct page *ipath_file_vma_nopage(struct vm_area_struct *vma, 11029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned long address, int *type) 11039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 11049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned long offset = address - vma->vm_start; 11059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct page *page = NOPAGE_SIGBUS; 11069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan void *pageptr; 11079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 11099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Convert the vmalloc address into a struct page. 11109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 11119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pageptr = (void *)(offset + (vma->vm_pgoff << PAGE_SHIFT)); 11129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan page = vmalloc_to_page(pageptr); 11139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!page) 11149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto out; 11159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Increment the reference count. */ 11179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan get_page(page); 11189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (type) 11199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan *type = VM_FAULT_MINOR; 11209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanout: 11219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return page; 11229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 11239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic struct vm_operations_struct ipath_file_vm_ops = { 11259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan .nopage = ipath_file_vma_nopage, 11269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan}; 11279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int mmap_kvaddr(struct vm_area_struct *vma, u64 pgaddr, 11299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd, unsigned subport) 11309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 11319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned long len; 11329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_devdata *dd; 11339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan void *addr; 11349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t size; 11359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret; 11369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* If the port is not shared, all addresses should be physical */ 11389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) { 11399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 11409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 11419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 11429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd = pd->port_dd; 11449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size; 11459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 11479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Master has all the slave uregbase, rcvhdrq, and 11489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * rcvegrbufs mmapped. 11499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 11509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (subport == 0) { 11519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned num_slaves = pd->port_subport_cnt - 1; 11529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 11539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (pgaddr == ((u64) pd->subport_uregbase & MMAP64_MASK)) { 11549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan addr = pd->subport_uregbase; 11559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = PAGE_SIZE * num_slaves; 11569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (pgaddr == ((u64) pd->subport_rcvhdr_base & 11579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan MMAP64_MASK)) { 11589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan addr = pd->subport_rcvhdr_base; 11599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = pd->port_rcvhdrq_size * num_slaves; 11609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (pgaddr == ((u64) pd->subport_rcvegrbuf & 11619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan MMAP64_MASK)) { 11629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan addr = pd->subport_rcvegrbuf; 11639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size *= num_slaves; 11649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 11659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 11669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 11679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 11689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (pgaddr == (((u64) pd->subport_uregbase + 11699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan PAGE_SIZE * (subport - 1)) & MMAP64_MASK)) { 11709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan addr = pd->subport_uregbase + PAGE_SIZE * (subport - 1); 11719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = PAGE_SIZE; 11729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (pgaddr == (((u64) pd->subport_rcvhdr_base + 11739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvhdrq_size * (subport - 1)) & 11749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan MMAP64_MASK)) { 11759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan addr = pd->subport_rcvhdr_base + 11769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvhdrq_size * (subport - 1); 11779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = pd->port_rcvhdrq_size; 11789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (pgaddr == (((u64) pd->subport_rcvegrbuf + 11799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size * (subport - 1)) & MMAP64_MASK)) { 11809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan addr = pd->subport_rcvegrbuf + size * (subport - 1); 11819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* rcvegrbufs are read-only on the slave */ 11829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (vma->vm_flags & VM_WRITE) { 11839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dev_info(&dd->pcidev->dev, 11849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "Can't map eager buffers as " 11859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "writable (flags=%lx)\n", vma->vm_flags); 11869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EPERM; 11879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 11889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 11899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 11909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Don't allow permission to later change to writeable 11919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * with mprotect. 11929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 11939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_flags &= ~VM_MAYWRITE; 11949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 11959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 11969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 11979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 11989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan len = vma->vm_end - vma->vm_start; 11999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (len > size) { 12009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(MM, "FAIL: reqlen %lx > %zx\n", len, size); 12019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 12029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 12039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 12049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_pgoff = (unsigned long) addr >> PAGE_SHIFT; 12069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_ops = &ipath_file_vm_ops; 12079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_flags |= VM_RESERVED | VM_DONTEXPAND; 12089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = 0; 12099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 12119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 12129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 12139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 12157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_mmap - mmap various structures into user space 12167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @fp: the file pointer 12177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @vma: the VM area 12187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 12197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We use this to have a shared buffer between the kernel and the user code 12207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for the rcvhdr queue, egr buffers, and the per-port user regs and pio 12217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * buffers in the chip. We have the open and close entries so we can bump 12227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the ref count and keep the driver from being unloaded while still mapped. 12237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_mmap(struct file *fp, struct vm_area_struct *vma) 12257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 12267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 12277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 12287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pgaddr, ureg; 12299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned piobufs, piocnt; 12307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 12317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 12339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd) { 12349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 12359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 12369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 12377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 1238f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 12397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 12407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This is the ipath_do_user_init() code, mapping the shared buffers 12417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * into the user process. The address referred to by vm_pgoff is the 12429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * file offset passed via mmap(). For shared ports, this is the 12439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * kernel vmalloc() address of the pages to share with the master. 12449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * For non-shared or master ports, this is a physical address. 12459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * We only do one mmap for each space mapped. 12467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pgaddr = vma->vm_pgoff << PAGE_SHIFT; 12487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 12509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Check for 0 in case one of the allocations failed, but user 12519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * called mmap anyway. 12527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pgaddr) { 12549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 12559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 1256f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 12577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(MM, "pgaddr %llx vm_start=%lx len %lx port %u:%u:%u\n", 12597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pgaddr, vma->vm_start, 12609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_end - vma->vm_start, dd->ipath_unit, 12619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, subport_fp(fp)); 12627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 12649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Physical addresses must fit in 40 bits for our hardware. 12659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Check for kernel virtual addresses first, anything else must 12669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * match a HW or memory address. 12679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 12689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (pgaddr >= (1ULL<<40)) { 12699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = mmap_kvaddr(vma, pgaddr, pd, subport_fp(fp)); 12709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 12719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 12729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_subport_cnt) { 12749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* port is not shared */ 12759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ureg = dd->ipath_uregbase + dd->ipath_palign * pd->port_port; 12769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piocnt = dd->ipath_pbufsport; 12779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piobufs = pd->port_piobufs; 12789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else if (!subport_fp(fp)) { 12799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* caller is the master */ 12809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ureg = dd->ipath_uregbase + dd->ipath_palign * pd->port_port; 12819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piocnt = (dd->ipath_pbufsport / pd->port_subport_cnt) + 12829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (dd->ipath_pbufsport % pd->port_subport_cnt); 12839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piobufs = pd->port_piobufs + 12849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_palign * (dd->ipath_pbufsport - piocnt); 12859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else { 12869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned slave = subport_fp(fp) - 1; 12879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* caller is a slave */ 12899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ureg = 0; 12909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piocnt = dd->ipath_pbufsport / pd->port_subport_cnt; 12919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan piobufs = pd->port_piobufs + dd->ipath_palign * piocnt * slave; 1292f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 12939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 12949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (pgaddr == ureg) 12957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_ureg(vma, dd, ureg); 12969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == piobufs) 12979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = mmap_piobufs(vma, dd, pd, piobufs, piocnt); 12989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == dd->ipath_pioavailregs_phys) 12999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* in-memory copy of pioavail registers */ 13009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0, 13011fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan (void *) dd->ipath_pioavailregs_dma, 13029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "pioavail registers"); 13039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (subport_fp(fp)) 13049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Subports don't mmap the physical receive buffers */ 13059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 13069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == pd->port_rcvegr_phys) 13077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_rcvegrbufs(vma, pd); 13089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == (u64) pd->port_rcvhdrq_phys) 1309f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* 1310525d0ca1d452ed336c1d907fb20c104467a8a47bBryan O'Sullivan * The rcvhdrq itself; readonly except on HT (so have 1311f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * to allow writable mapping), multiple pages, contiguous 1312f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * from an i/o perspective. 1313f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan */ 13149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, pd->port_rcvhdrq_size, 1, 13151fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pd->port_rcvhdrq, 1316f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "rcvhdrq"); 13179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan else if (pgaddr == (u64) pd->port_rcvhdrqtailaddr_phys) 1318f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* in-memory copy of rcvhdrq tail register */ 1319f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0, 13201fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pd->port_rcvhdrtail_kvaddr, 1321f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "rcvhdrq tail"); 13227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else 13237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 13247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_private_data = NULL; 13267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 13287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 13299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "Failure %d on off %llx len %lx\n", 13309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan -ret, (unsigned long long)pgaddr, 13319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vma->vm_end - vma->vm_start); 13329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 13337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 13347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 13357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic unsigned int ipath_poll(struct file *fp, 13377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct poll_table_struct *pt) 13387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 13397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 13407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 head, tail; 13417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int bit; 1342e35d710d0c5b74bc9833d6a3791706bd577a3724Bryan O'Sullivan unsigned pollflag = 0; 13437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 13447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 13469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd) 13479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 13487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 13497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan bit = pd->port_port + INFINIPATH_R_INTRAVAIL_SHIFT; 13517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan set_bit(bit, &dd->ipath_rcvctrl); 13527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 13547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Before blocking, make sure that head is still == tail, 13557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * reading from the chip, so we can be sure the interrupt 13567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * enable has made it to the chip. If not equal, disable 13577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * interrupt again and return immediately. This avoids races, 13587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * and the overhead of the chip read doesn't matter much at 13597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * this point, since we are waiting for something anyway. 13607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 13617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 13637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl); 13647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan head = ipath_read_ureg32(dd, ur_rcvhdrhead, pd->port_port); 13667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tail = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); 13677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (tail == head) { 13697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan set_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag); 13709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (dd->ipath_rhdrhead_intr_off) /* arm rcv interrupt */ 13719dcc0e58e2913f7e6ffba64c27fe5c2f2c7b845cBryan O'Sullivan (void)ipath_write_ureg(dd, ur_rcvhdrhead, 13729dcc0e58e2913f7e6ffba64c27fe5c2f2c7b845cBryan O'Sullivan dd->ipath_rhdrhead_intr_off 13739dcc0e58e2913f7e6ffba64c27fe5c2f2c7b845cBryan O'Sullivan | head, pd->port_port); 13747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan poll_wait(fp, &pd->port_wait, pt); 13757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (test_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag)) { 13777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* timed out, no packets received */ 13787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan clear_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag); 13797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvwait_to++; 13807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1381e35d710d0c5b74bc9833d6a3791706bd577a3724Bryan O'Sullivan else 1382e35d710d0c5b74bc9833d6a3791706bd577a3724Bryan O'Sullivan pollflag = POLLIN | POLLRDNORM; 13837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else { 13857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* it's already happened; don't do wait_event overhead */ 1386e35d710d0c5b74bc9833d6a3791706bd577a3724Bryan O'Sullivan pollflag = POLLIN | POLLRDNORM; 13877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvnowait++; 13887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan clear_bit(bit, &dd->ipath_rcvctrl); 13917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 13927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl); 13937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 1395e35d710d0c5b74bc9833d6a3791706bd577a3724Bryan O'Sullivan return pollflag; 13967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 13977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int init_subports(struct ipath_devdata *dd, 13999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd, 14009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 14019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 14029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret = 0; 14039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned num_slaves; 14049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t size; 14059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 14069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Old user binaries don't know about subports */ 14079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if ((uinfo->spu_userversion & 0xffff) != IPATH_USER_SWMINOR) 14089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 14099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 14109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * If the user is requesting zero or one port, 14119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * skip the subport allocation. 14129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 14139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (uinfo->spu_subport_cnt <= 1) 14149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 14159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (uinfo->spu_subport_cnt > 4) { 14169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 14179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 14189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 14199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 14209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan num_slaves = uinfo->spu_subport_cnt - 1; 14219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->subport_uregbase = vmalloc(PAGE_SIZE * num_slaves); 14229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->subport_uregbase) { 14239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENOMEM; 14249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 14259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 14269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Note: pd->port_rcvhdrq_size isn't initialized yet. */ 14279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize * 14289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan sizeof(u32), PAGE_SIZE) * num_slaves; 14299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->subport_rcvhdr_base = vmalloc(size); 14309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->subport_rcvhdr_base) { 14319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENOMEM; 14329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail_ureg; 14339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 14349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 14359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->subport_rcvegrbuf = vmalloc(pd->port_rcvegrbuf_chunks * 14369929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_rcvegrbuf_size * 14379929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan num_slaves); 14389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->subport_rcvegrbuf) { 14399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENOMEM; 14409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail_rhdr; 14419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 14429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 14439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_subport_cnt = uinfo->spu_subport_cnt; 14449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_subport_id = uinfo->spu_subport_id; 14459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->active_slaves = 1; 14469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 14479929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 14489929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail_rhdr: 14499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vfree(pd->subport_rcvhdr_base); 14509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail_ureg: 14519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan vfree(pd->subport_uregbase); 14529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->subport_uregbase = NULL; 14539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 14549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 14559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 14569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 14577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int try_alloc_port(struct ipath_devdata *dd, int port, 14589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct file *fp, 14599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 14607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 14619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd; 14627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 14637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!(pd = dd->ipath_pd[port])) { 14659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan void *ptmp; 14667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd = kzalloc(sizeof(struct ipath_portdata), GFP_KERNEL); 14687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 14707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Allocate memory for use in ipath_tid_update() just once 14717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * at open, not per call. Reduces cost of expected send 14727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * setup. 14737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 14747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ptmp = kmalloc(dd->ipath_rcvtidcnt * sizeof(u16) + 14757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidcnt * sizeof(struct page **), 14767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan GFP_KERNEL); 14779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd || !ptmp) { 14787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Unable to allocate portdata " 14797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "memory, failing open\n"); 14807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 14819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(pd); 14827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kfree(ptmp); 14837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 14847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 14859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_pd[port] = pd; 14867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_port = port; 14877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_dd = dd; 14887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_tid_pg_list = ptmp; 14897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan init_waitqueue_head(&dd->ipath_pd[port]->port_wait); 14907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 14919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd->port_cnt) { 14929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->userversion = uinfo->spu_userversion; 14939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan init_user_egr_sizes(pd); 14949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if ((ret = init_subports(dd, pd, uinfo)) != 0) 14959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 14967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] opened unit:port %u:%u\n", 14977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, dd->ipath_unit, 14987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan port); 14999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_cnt = 1; 15009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan port_fp(fp) = pd; 15019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_pid = current->pid; 15029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan strncpy(pd->port_comm, current->comm, sizeof(pd->port_comm)); 15037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_ports++; 15047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 15059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else 15069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EBUSY; 15077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 15097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 15107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 15117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic inline int usable(struct ipath_devdata *dd) 15137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 15147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return dd && 15157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (dd->ipath_flags & IPATH_PRESENT) && 15167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_kregbase && 15177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_lid && 15187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan !(dd->ipath_flags & (IPATH_LINKDOWN | IPATH_DISABLED 15197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan | IPATH_LINKUNK)); 15207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 15217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int find_free_port(int unit, struct file *fp, 15239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 15247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 15257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(unit); 15267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret, i; 15277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd) { 15297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENODEV; 15307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 15317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!usable(dd)) { 15347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENETDOWN; 15357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 15367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15389929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan for (i = 1; i < dd->ipath_cfgports; i++) { 15399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = try_alloc_port(dd, i, fp, uinfo); 15407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret != -EBUSY) 15417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 15427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 15447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 15467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 15477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 15487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15499929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int find_best_unit(struct file *fp, 15509929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 15517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 15527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0, i, prefunit = -1, devmax; 15537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int maxofallports, npresent, nup; 15547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ndev; 15557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan devmax = ipath_count_units(&npresent, &nup, &maxofallports); 15577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 15597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This code is present to allow a knowledgeable person to 15607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * specify the layout of processes to processors before opening 15617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * this driver, and then we'll assign the process to the "closest" 1562525d0ca1d452ed336c1d907fb20c104467a8a47bBryan O'Sullivan * InfiniPath chip to that processor (we assume reasonable connectivity, 15637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for now). This code assumes that if affinity has been set 15647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * before this point, that at most one cpu is set; for now this 15657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * is reasonable. I check for both cpus_empty() and cpus_full(), 15667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in case some kernel variant sets none of the bits when no 15677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * affinity is set. 2.6.11 and 12 kernels have all present 15687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * cpus set. Some day we'll have to fix it up further to handle 1569525d0ca1d452ed336c1d907fb20c104467a8a47bBryan O'Sullivan * a cpu subset. This algorithm fails for two HT chips connected 15707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in tunnel fashion. Eventually this needs real topology 15717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * information. There may be some issues with dual core numbering 15727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * as well. This needs more work prior to release. 15737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 15747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cpus_empty(current->cpus_allowed) && 15757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan !cpus_full(current->cpus_allowed)) { 15767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ncpus = num_online_cpus(), curcpu = -1; 15777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ncpus; i++) 15787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cpu_isset(i, current->cpus_allowed)) { 15797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] affinity set for " 15807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "cpu %d\n", current->comm, 15817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->pid, i); 15827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan curcpu = i; 15837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (curcpu != -1) { 15857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (npresent) { 15867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit = curcpu / (ncpus / npresent); 15877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("%s[%u] %d chips, %d cpus, " 15887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%d cpus/chip, select unit %d\n", 15897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, 15907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan npresent, ncpus, ncpus / npresent, 15917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit); 15927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 15977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * user ports start at 1, kernel port is 0 15987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * For now, we do round-robin access across all chips 15997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 16007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (prefunit != -1) 16027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan devmax = prefunit + 1; 16037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanrecheck: 16047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 1; i < maxofallports; i++) { 16057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (ndev = prefunit != -1 ? prefunit : 0; ndev < devmax; 16067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ndev++) { 16077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(ndev); 16087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!usable(dd)) 16107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; /* can't use this unit */ 16117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (i >= dd->ipath_cfgports) 16127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 16137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Maxed out on users of this unit. Try 16147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * next. 16157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 16167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 16179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = try_alloc_port(dd, i, fp, uinfo); 16187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!ret) 16197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 16207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (npresent) { 16247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (nup == 0) { 16257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENETDOWN; 16267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No ports available (none initialized " 16277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "and ready)\n"); 16287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 16297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (prefunit > 0) { 16307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* if started above 0, retry from 0 */ 16317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, 16327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%s[%u] no ports on prefunit " 16337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%d, clear and re-check\n", 16347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, 16357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit); 16367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan devmax = ipath_count_units(NULL, NULL, 16377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan NULL); 16387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit = -1; 16397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto recheck; 16407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 16427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No ports available\n"); 16437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 16457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENXIO; 16467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No boards found\n"); 16477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 16507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 16517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 16527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16539929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int find_shared_port(struct file *fp, 16549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 16559929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 16569929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int devmax, ndev, i; 16579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret = 0; 16589929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 16599929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan devmax = ipath_count_units(NULL, NULL, NULL); 16609929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 16619929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan for (ndev = 0; ndev < devmax; ndev++) { 16629929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(ndev); 16639929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 16649929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!dd) 16659929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan continue; 16669929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan for (i = 1; i < dd->ipath_cfgports; i++) { 16679929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_portdata *pd = dd->ipath_pd[i]; 16689929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 16699929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Skip ports which are not yet open */ 16709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd || !pd->port_cnt) 16719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan continue; 16729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Skip port if it doesn't match the requested one */ 16739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (pd->port_subport_id != uinfo->spu_subport_id) 16749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan continue; 16759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Verify the sharing process matches the master */ 16769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (pd->port_subport_cnt != uinfo->spu_subport_cnt || 16779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->userversion != uinfo->spu_userversion || 16789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_cnt >= pd->port_subport_cnt) { 16799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 16809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 16819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 16829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan port_fp(fp) = pd; 16839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_fp(fp) = pd->port_cnt++; 16849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan tidcursor_fp(fp) = 0; 16859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->active_slaves |= 1 << subport_fp(fp); 16869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(PROC, 16879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "%s[%u] %u sharing %s[%u] unit:port %u:%u\n", 16889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan current->comm, current->pid, 16899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan subport_fp(fp), 16909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_comm, pd->port_pid, 16919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_unit, pd->port_port); 16929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = 1; 16939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 16949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 16959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 16969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 16979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivandone: 16989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 16999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 17009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_open(struct inode *in, struct file *fp) 17027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 1703c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan /* The real work is performed later in ipath_assign_port() */ 17049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan fp->private_data = kzalloc(sizeof(struct ipath_filedata), GFP_KERNEL); 17059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return fp->private_data ? 0 : -ENOMEM; 17069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 17079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1708c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan 1709c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan/* Get port early, so can set affinity prior to memory allocation */ 1710c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivanstatic int ipath_assign_port(struct file *fp, 17119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan const struct ipath_user_info *uinfo) 17129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 17139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret; 17149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int i_minor; 17159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan unsigned swminor; 17169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Check to be sure we haven't already initialized this file */ 17189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (port_fp(fp)) { 17199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 17209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 17219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 17229929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* for now, if major version is different, bail */ 17249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if ((uinfo->spu_userversion >> 16) != IPATH_USER_SWMAJOR) { 17259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_dbg("User major version %d not same as driver " 17269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "major %d\n", uinfo->spu_userversion >> 16, 17279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan IPATH_USER_SWMAJOR); 17289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -ENODEV; 17299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 17309929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 17319929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan swminor = uinfo->spu_userversion & 0xffff; 17339929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (swminor != IPATH_USER_SWMINOR) 17349929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_dbg("User minor version %d not same as driver " 17359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan "minor %d\n", swminor, IPATH_USER_SWMINOR); 17367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_lock(&ipath_mutex); 17387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17399929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (swminor == IPATH_USER_SWMINOR && uinfo->spu_subport_cnt && 17409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (ret = find_shared_port(fp, uinfo))) { 17419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan mutex_unlock(&ipath_mutex); 17429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret > 0) 17439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = 0; 17449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 17459929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 17469929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17471cfd6e648b5ea21b0d48bf6f18b129e4576557d5Josef Sipek i_minor = iminor(fp->f_path.dentry->d_inode) - IPATH_USER_MINOR_BASE; 17487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "open on dev %lx (minor %d)\n", 17491cfd6e648b5ea21b0d48bf6f18b129e4576557d5Josef Sipek (long)fp->f_path.dentry->d_inode->i_rdev, i_minor); 17507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17519929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (i_minor) 17529929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = find_free_port(i_minor - 1, fp, uinfo); 17537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else 17549929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = find_best_unit(fp, uinfo); 17557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_unlock(&ipath_mutex); 17579929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 1758c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivandone: 1759c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan return ret; 1760c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan} 1761c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan 1762c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan 1763c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivanstatic int ipath_do_user_init(struct file *fp, 1764c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan const struct ipath_user_info *uinfo) 1765c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan{ 1766c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan int ret; 1767c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan struct ipath_portdata *pd; 1768c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan struct ipath_devdata *dd; 1769c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan u32 head32; 17709929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17719929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd = port_fp(fp); 17729929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd = pd->port_dd; 17739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (uinfo->spu_rcvhdrsize) { 17759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_setrcvhdrsize(dd, uinfo->spu_rcvhdrsize); 17769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret) 17779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 17789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 17799929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17809929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* for now we do nothing with rcvhdrcnt: uinfo->spu_rcvhdrcnt */ 17819929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17829929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* for right now, kernel piobufs are at end, so port 1 is at 0 */ 17839929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_piobufs = dd->ipath_piobufbase + 17849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_pbufsport * (pd->port_port - 1) * dd->ipath_palign; 17859929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(VERBOSE, "Set base of piobufs for port %u to 0x%x\n", 17869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, pd->port_piobufs); 17879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 17889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 17899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * Now allocate the rcvhdr Q and eager TIDs; skip the TID 17909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * array for time being. If pd->port_port > chip-supported, 17919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * we need to do extra stuff here to handle by handling overflow 17929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * through port 0, someday 17939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 17949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_create_rcvhdrq(dd, pd); 17959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!ret) 17969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_create_user_egr(pd); 17979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret) 17989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto done; 17999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 18009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 18019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * set the eager head register for this port to the current values 18029929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * of the tail pointers, since we don't know if they were 18039929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * updated on last use of the port. 18049929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 18059929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan head32 = ipath_read_ureg32(dd, ur_rcvegrindextail, pd->port_port); 18069929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_write_ureg(dd, ur_rcvegrindexhead, head32, pd->port_port); 18079929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_lastegrheads[pd->port_port] = -1; 18089929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_lastrcvhdrqtails[pd->port_port] = -1; 18099929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_cdbg(VERBOSE, "Wrote port%d egrhead %x from tail regs\n", 18109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_port, head32); 18119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->port_tidcursor = 0; /* start at beginning after open */ 18129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 18139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * now enable the port; the tail registers will be written to memory 18149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * by the chip as soon as it sees the write to 18159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * dd->ipath_kregs->kr_rcvctrl. The update only happens on 18169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * transition from 0 to 1, so clear it first, then set it as part of 18179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * enabling the port. This will (very briefly) affect any other 18189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * open ports, but it shouldn't be long enough to be an issue. 18199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * We explictly set the in-memory copy to 0 beforehand, so we don't 18209929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * have to wait to be sure the DMA update has happened. 18219929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 18221fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan *(volatile u64 *)pd->port_rcvhdrtail_kvaddr = 0ULL; 18239929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan set_bit(INFINIPATH_R_PORTENABLE_SHIFT + pd->port_port, 18249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan &dd->ipath_rcvctrl); 18259929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 18269929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_rcvctrl & ~INFINIPATH_R_TAILUPD); 18279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 18289929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dd->ipath_rcvctrl); 18299929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivandone: 18307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 18317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 18327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 18347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * unlock_exptid - unlock any expected TID entries port still had in use 18357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: port 18367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 18377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We don't actually update the chip here, because we do a bulk update 18387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * below, using ipath_f_clear_tids. 18397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 18407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void unlock_expected_tids(struct ipath_portdata *pd) 18417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 18427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 18437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int port_tidbase = pd->port_port * dd->ipath_rcvtidcnt; 18447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, cnt = 0, maxtid = port_tidbase + dd->ipath_rcvtidcnt; 18457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port %u unlocking any locked expTID pages\n", 18477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port); 18487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = port_tidbase; i < maxtid; i++) { 18497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow[i]) 18507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 18517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18521fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan pci_unmap_page(dd->pcidev, dd->ipath_physshadow[i], 18531fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan PAGE_SIZE, PCI_DMA_FROMDEVICE); 18547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_release_user_pages_on_close(&dd->ipath_pageshadow[i], 18557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1); 18567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[i] = NULL; 18577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt++; 18587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 18597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 18607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cnt) 18617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port %u locked %u expTID entries\n", 18627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, cnt); 18637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ipath_stats.sps_pagelocks || ipath_stats.sps_pageunlocks) 18657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "%llu pages locked, %llu unlocked\n", 18667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) ipath_stats.sps_pagelocks, 18677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) 18687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks); 18697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 18707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_close(struct inode *in, struct file *fp) 18727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 18737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 18749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan struct ipath_filedata *fd; 18757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 18767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 18777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned port; 18787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "close on dev %lx, private data %p\n", 18807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (long)in->i_rdev, fp->private_data); 18817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_lock(&ipath_mutex); 18837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan fd = (struct ipath_filedata *) fp->private_data; 18857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan fp->private_data = NULL; 18869929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd = fd->pd; 18879929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (!pd) { 18889929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan mutex_unlock(&ipath_mutex); 18899929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 18909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 18919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (--pd->port_cnt) { 18929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* 18939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * XXX If the master closes the port before the slave(s), 18949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * revoke the mmap for the eager receive queue so 18959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan * the slave(s) don't wait for receive data forever. 18969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan */ 18979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan pd->active_slaves &= ~(1 << fd->subport); 18989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan mutex_unlock(&ipath_mutex); 18999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 19009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 19019929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan port = pd->port_port; 19027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 19037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 19047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_hdrqfull) { 19057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] had %u rcvhdrqfull errors " 19067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "during run\n", pd->port_comm, pd->port_pid, 19077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_hdrqfull); 19087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_hdrqfull = 0; 19097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 19107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 19117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_rcvwait_to || pd->port_piowait_to 19127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan || pd->port_rcvnowait || pd->port_pionowait) { 19137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "port%u, %u rcv, %u pio wait timeo; " 19147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%u rcv %u, pio already\n", 19157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, pd->port_rcvwait_to, 19167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_piowait_to, pd->port_rcvnowait, 19177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pionowait); 19187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvwait_to = pd->port_piowait_to = 19197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvnowait = pd->port_pionowait = 0; 19207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 19217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_flag) { 19227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u port_flag still set to 0x%lx\n", 19237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, pd->port_flag); 19247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_flag = 0; 19257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 19267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 19277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_kregbase) { 192835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan int i; 192935783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan /* atomically clear receive enable port. */ 193035783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan clear_bit(INFINIPATH_R_PORTENABLE_SHIFT + port, 193135783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan &dd->ipath_rcvctrl); 193235783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg( dd, dd->ipath_kregs->kr_rcvctrl, 193335783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_rcvctrl); 193435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan /* and read back from chip to be sure that nothing 193535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * else is in flight when we do the rest */ 193635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan (void)ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); 19377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 19387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* clean up the pkeys for this port user */ 19397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_clean_part_key(pd, dd); 194035783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan /* 194135783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * be paranoid, and never write 0's to these, just use an 194235783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * unused part of the port 0 tail page. Of course, 194335783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * rcvhdraddr points to a large chunk of memory, so this 194435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * could still trash things, but at least it won't trash 194535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * page 0, and by disabling the port, it should stop "soon", 194635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * even if a packet or two is in already in flight after we 194735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * disabled the port. 194835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan */ 194935783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg_port(dd, 195035783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_kregs->kr_rcvhdrtailaddr, port, 195135783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_dummy_hdrq_phys); 195235783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdraddr, 195335783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan pd->port_port, dd->ipath_dummy_hdrq_phys); 195435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan 195535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan i = dd->ipath_pbufsport * (port - 1); 195635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_disarm_piobufs(dd, i, dd->ipath_pbufsport); 195735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan 19581fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan dd->ipath_f_clear_tids(dd, pd->port_port); 19591fd3b40fde3bfacdf742cadfe99cfd47ffd05219Bryan O'Sullivan 196035783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan if (dd->ipath_pageshadow) 196135783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan unlock_expected_tids(pd); 196235783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_stats.sps_ports--; 196335783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] closed port %u:%u\n", 196435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan pd->port_comm, pd->port_pid, 196535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_unit, port); 19667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 19677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 19687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pid = 0; 1969f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dd->ipath_pd[pd->port_port] = NULL; /* before releasing mutex */ 19707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_unlock(&ipath_mutex); 1971f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ipath_free_pddata(dd, pd); /* after releasing the mutex */ 19727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 19739929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanbail: 19749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan kfree(fd); 19757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 19767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 19777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 19789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_port_info(struct ipath_portdata *pd, u16 subport, 19797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_port_info __user *uinfo) 19807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 19817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_port_info info; 19827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int nup; 19837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 19849929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan size_t sz; 19857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 19867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void) ipath_count_units(NULL, &nup, NULL); 19877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.num_active = nup; 19887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.unit = pd->port_dd->ipath_unit; 19897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.port = pd->port_port; 19909929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan info.subport = subport; 19919929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Don't return new fields if old library opened the port. */ 19929929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if ((pd->userversion & 0xffff) == IPATH_USER_SWMINOR) { 19939929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan /* Number of user ports available for this device. */ 19949929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan info.num_ports = pd->port_dd->ipath_cfgports - 1; 19959929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan info.num_subports = pd->port_subport_cnt; 19969929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan sz = sizeof(info); 19979929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } else 19989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan sz = sizeof(info) - 2 * sizeof(u16); 19997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (copy_to_user(uinfo, &info, sz)) { 20017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 20027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 20037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 20047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 20057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 20077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 20087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 20097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20109929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivanstatic int ipath_get_slave_info(struct ipath_portdata *pd, 20119929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan void __user *slave_mask_addr) 20129929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan{ 20139929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan int ret = 0; 20149929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 20159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (copy_to_user(slave_mask_addr, &pd->active_slaves, sizeof(u32))) 20169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EFAULT; 20179929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan return ret; 20189929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan} 20199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan 20207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic ssize_t ipath_write(struct file *fp, const char __user *data, 20217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t count, loff_t *off) 20227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 20237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_cmd __user *ucmd; 20247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 20257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const void __user *src; 20267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t consumed, copy; 20277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_cmd cmd; 20287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ssize_t ret = 0; 20297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan void *dest; 20307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (count < sizeof(cmd.type)) { 20327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 20337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 20347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 20357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ucmd = (const struct ipath_cmd __user *) data; 20377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_from_user(&cmd.type, &ucmd->type, sizeof(cmd.type))) { 20397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 20407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 20417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 20427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan consumed = sizeof(cmd.type); 20447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan switch (cmd.type) { 2046c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case IPATH_CMD_ASSIGN_PORT: 2047c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case __IPATH_CMD_USER_INIT: 20487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_USER_INIT: 20497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.user_info); 20507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.user_info; 20517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.user_info; 20527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 20537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_RECV_CTRL: 20547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.recv_ctrl); 20557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.recv_ctrl; 20567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.recv_ctrl; 20577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 20587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_PORT_INFO: 20597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.port_info); 20607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.port_info; 20617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.port_info; 20627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 20637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_UPDATE: 20647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_FREE: 20657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.tid_info); 20667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.tid_info; 20677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.tid_info; 20687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 20697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_SET_PART_KEY: 20707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.part_key); 20717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.part_key; 20727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.part_key; 20737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 20749929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan case IPATH_CMD_SLAVE_INFO: 20759929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan copy = sizeof(cmd.cmd.slave_mask_addr); 20769929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan dest = &cmd.cmd.slave_mask_addr; 20779929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan src = &ucmd->cmd.slave_mask_addr; 20789929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan break; 20797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan default: 20807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 20817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 20827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 20837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((count - consumed) < copy) { 20857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 20867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 20877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 20887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_from_user(dest, src, copy)) { 20907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 20917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 20927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 20937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 20947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan consumed += copy; 20957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 2096c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan if (!pd && cmd.type != __IPATH_CMD_USER_INIT && 2097c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan cmd.type != IPATH_CMD_ASSIGN_PORT) { 20989929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = -EINVAL; 20999929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan goto bail; 21009929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan } 21017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan switch (cmd.type) { 2103c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case IPATH_CMD_ASSIGN_PORT: 2104c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan ret = ipath_assign_port(fp, &cmd.cmd.user_info); 2105c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan if (ret) 2106c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan goto bail; 2107c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan break; 2108c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan case __IPATH_CMD_USER_INIT: 2109c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan /* backwards compatibility, get port first */ 2110c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan ret = ipath_assign_port(fp, &cmd.cmd.user_info); 2111c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan if (ret) 2112c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan goto bail; 2113c97d27d8a992cf6cefee945489d5f93fca160aa2Bryan O'Sullivan /* and fall through to current version. */ 21147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_USER_INIT: 21159929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_do_user_init(fp, &cmd.cmd.user_info); 21169929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan if (ret) 21177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 21187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_get_base_info( 21199929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan fp, (void __user *) (unsigned long) 21207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cmd.cmd.user_info.spu_base_info, 21217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cmd.cmd.user_info.spu_base_info_size); 21227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 21237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_RECV_CTRL: 21249929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_manage_rcvq(pd, subport_fp(fp), cmd.cmd.recv_ctrl); 21257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 21267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_PORT_INFO: 21279929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_port_info(pd, subport_fp(fp), 21287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (struct ipath_port_info __user *) 21297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) cmd.cmd.port_info); 21307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 21317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_UPDATE: 21329929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_tid_update(pd, fp, &cmd.cmd.tid_info); 21337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 21347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_FREE: 21359929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_tid_free(pd, subport_fp(fp), &cmd.cmd.tid_info); 21367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 21377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_SET_PART_KEY: 21387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_set_part_key(pd, cmd.cmd.part_key); 21397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 21409929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan case IPATH_CMD_SLAVE_INFO: 21419929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan ret = ipath_get_slave_info(pd, 21429929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan (void __user *) (unsigned long) 21439929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan cmd.cmd.slave_mask_addr); 21449929b0fb0f35f54371e9364bab809bcd753f9d3aBryan O'Sullivan break; 21457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret >= 0) 21487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = consumed; 21497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 21517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 21527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 21537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct class *ipath_class; 21557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21562b8693c0617e972fc0b2fd1ebf8de97e15b656c3Arjan van de Venstatic int init_cdev(int minor, char *name, const struct file_operations *fops, 21577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct cdev **cdevp, struct class_device **class_devp) 21587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 21597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const dev_t dev = MKDEV(IPATH_MAJOR, minor); 21607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct cdev *cdev = NULL; 21617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device *class_dev = NULL; 21627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 21637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev = cdev_alloc(); 21657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cdev) { 21667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME 21677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ": Could not allocate cdev for minor %d, %s\n", 21687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name); 21697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 21707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 21717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev->owner = THIS_MODULE; 21747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev->ops = fops; 21757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kobject_set_name(&cdev->kobj, name); 21767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = cdev_add(cdev, dev, 1); 21787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 21797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME 21807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ": Could not add cdev for minor %d, %s (err %d)\n", 21817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name, -ret); 21827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto err_cdev; 21837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan class_dev = class_device_create(ipath_class, NULL, dev, NULL, name); 21867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (IS_ERR(class_dev)) { 21887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = PTR_ERR(class_dev); 21897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not create " 21907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "class_dev for minor %d, %s (err %d)\n", 21917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name, -ret); 21927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto err_cdev; 21937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 21947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 21967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 21977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanerr_cdev: 21987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev_del(cdev); 21997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev = NULL; 22007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 22027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret >= 0) { 22037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = cdev; 22047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *class_devp = class_dev; 22057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 22067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = NULL; 22077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *class_devp = NULL; 22087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 22097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 22117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 22127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22132b8693c0617e972fc0b2fd1ebf8de97e15b656c3Arjan van de Venint ipath_cdev_init(int minor, char *name, const struct file_operations *fops, 22147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct cdev **cdevp, struct class_device **class_devp) 22157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 22167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return init_cdev(minor, name, fops, cdevp, class_devp); 22177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 22187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void cleanup_cdev(struct cdev **cdevp, 22207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device **class_devp) 22217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 22227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device *class_dev = *class_devp; 22237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (class_dev) { 22257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan class_device_unregister(class_dev); 22267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *class_devp = NULL; 22277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 22287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (*cdevp) { 22307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev_del(*cdevp); 22317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = NULL; 22327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 22337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 22347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanvoid ipath_cdev_cleanup(struct cdev **cdevp, 22367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device **class_devp) 22377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 22387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cleanup_cdev(cdevp, class_devp); 22397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 22407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct cdev *wildcard_cdev; 22427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct class_device *wildcard_class_dev; 22437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic const dev_t dev = MKDEV(IPATH_MAJOR, 0); 22457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int user_init(void) 22477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 22487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 22497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = register_chrdev_region(dev, IPATH_NMINORS, IPATH_DRV_NAME); 22517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 22527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not register " 22537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "chrdev region (err %d)\n", -ret); 22547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 22557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 22567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_class = class_create(THIS_MODULE, IPATH_DRV_NAME); 22587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (IS_ERR(ipath_class)) { 22607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = PTR_ERR(ipath_class); 22617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not create " 22627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "device class (err %d)\n", -ret); 22637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 22647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 22657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 22677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 22687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unregister_chrdev_region(dev, IPATH_NMINORS); 22697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 22707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 22717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 22727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void user_cleanup(void) 22747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 22757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ipath_class) { 22767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan class_destroy(ipath_class); 22777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_class = NULL; 22787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 22797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unregister_chrdev_region(dev, IPATH_NMINORS); 22817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 22827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic atomic_t user_count = ATOMIC_INIT(0); 22847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic atomic_t user_setup = ATOMIC_INIT(0); 22857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanint ipath_user_add(struct ipath_devdata *dd) 22877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 22887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan char name[10]; 22897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 22907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 22917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_inc_return(&user_count) == 1) { 22927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = user_init(); 22937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 22947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Unable to set up user support: " 22957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "error %d\n", -ret); 22967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 22977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 22987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = init_cdev(0, "ipath", &ipath_file_ops, &wildcard_cdev, 22997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &wildcard_class_dev); 23007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 23017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Could not create wildcard " 23027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "minor: error %d\n", -ret); 23030fd41363e0785247b7c19127318abc8b5eacc86bBryan O'Sullivan goto bail_user; 23047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 23057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_set(&user_setup, 1); 23077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 23087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan snprintf(name, sizeof(name), "ipath%d", dd->ipath_unit); 23107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = init_cdev(dd->ipath_unit + 1, name, &ipath_file_ops, 2312a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan &dd->user_cdev, &dd->user_class_dev); 23137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 23147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Could not create user minor %d, %s\n", 23157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_unit + 1, name); 23167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 23187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23190fd41363e0785247b7c19127318abc8b5eacc86bBryan O'Sullivanbail_user: 23207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan user_cleanup(); 23217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 23227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 23237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 23247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2325a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivanvoid ipath_user_remove(struct ipath_devdata *dd) 23267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 2327a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan cleanup_cdev(&dd->user_cdev, &dd->user_class_dev); 23287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_dec_return(&user_count) == 0) { 23307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_read(&user_setup) == 0) 23317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 23327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cleanup_cdev(&wildcard_cdev, &wildcard_class_dev); 23347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan user_cleanup(); 23357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 23367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_set(&user_setup, 0); 23377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 23387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 23397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return; 23407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 2341