ipath_file_ops.c revision 0ed9a4a0b6df0548f9ccadb62add2c0155d5262c
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" 427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include "ips_common.h" 437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan#include "ipath_layer.h" 447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_open(struct inode *, struct file *); 467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_close(struct inode *, struct file *); 477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic ssize_t ipath_write(struct file *, const char __user *, size_t, 487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan loff_t *); 497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic unsigned int ipath_poll(struct file *, struct poll_table_struct *); 507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_mmap(struct file *, struct vm_area_struct *); 517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct file_operations ipath_file_ops = { 537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .owner = THIS_MODULE, 547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .write = ipath_write, 557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .open = ipath_open, 567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .release = ipath_close, 577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .poll = ipath_poll, 587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan .mmap = ipath_mmap 597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan}; 607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_get_base_info(struct ipath_portdata *pd, 627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan void __user *ubase, size_t ubase_size) 637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_base_info *kinfo = NULL; 667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ubase_size < sizeof(*kinfo)) { 697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, 707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "Base size %lu, need %lu (version mismatch?)\n", 717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) ubase_size, 727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) sizeof(*kinfo)); 737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo = kzalloc(sizeof(*kinfo), GFP_KERNEL); 787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (kinfo == NULL) { 797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = dd->ipath_f_get_base_info(pd, kinfo); 847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdr_cnt = dd->ipath_rcvhdrcnt; 887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdrent_size = dd->ipath_rcvhdrentsize; 897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_tidegrcnt = dd->ipath_rcvegrcnt; 907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbufsize = dd->ipath_rcvegrbufsize; 917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * have to mmap whole thing 937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbuftotlen = 957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size; 967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrperchunk = pd->port_rcvegrbufs_perchunk; 977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrchunksize = kinfo->spi_rcv_egrbuftotlen / 987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_chunks; 997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_tidcnt = dd->ipath_rcvtidcnt; 1007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for this use, may be ipath_cfgports summed over all chips that 1027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * are are configured and present 1037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_nports = dd->ipath_cfgports; 1057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* unit (chip/board) our port is on */ 1067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_unit = dd->ipath_unit; 1077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for now, only a single page */ 1087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_tid_maxsize = PAGE_SIZE; 1097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Doing this per port, and based on the skip value, etc. This has 1127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * to be the actual buffer size, since the protocol code treats it 1137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * as an array. 1147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 1157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * These have to be set to user addresses in the user code via mmap. 1167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * These values are used on return to user code for the mmap target 1177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * addresses only. For 32 bit, same 44 bit address problem, so use 1187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the physical address, not virtual. Before 2.6.11, using the 1197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * page_address() macro worked, but in 2.6.11, even that returns the 1207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * full 64 bit address (upper bits all 1's). So far, using the 1217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * physical addresses (or chip offsets, for chip mapping) works, but 1227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * no doubt some future kernel release will chang that, and we'll be 1237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * on to yet another method of dealing with this 1247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcvhdr_base = (u64) pd->port_rcvhdrq_phys; 1267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbufs = (u64) pd->port_rcvegr_phys; 1277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_pioavailaddr = (u64) dd->ipath_pioavailregs_phys; 1287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_status = (u64) kinfo->spi_pioavailaddr + 1297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) dd->ipath_statusp - 1307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) dd->ipath_pioavailregs_dma; 1317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_piobufbase = (u64) pd->port_piobufs; 1327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->__spi_uregbase = 1337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_uregbase + dd->ipath_palign * pd->port_port; 1347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_pioindex = dd->ipath_pbufsport * (pd->port_port - 1); 1367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_piocnt = dd->ipath_pbufsport; 1377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_pioalign = dd->ipath_palign; 1387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_qpair = IPATH_KD_QP; 1407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_piosize = dd->ipath_ibmaxlen; 1417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_mtu = dd->ipath_ibmaxlen; /* maxlen, not ibmtu */ 1427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_port = pd->port_port; 143eaf6733bc176742fb08def2269441684e963c275Bryan O'Sullivan kinfo->spi_sw_version = IPATH_KERN_SWVERSION; 1447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_hw_version = dd->ipath_revision; 1457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user(ubase, kinfo, sizeof(*kinfo))) 1477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 1487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 1507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kfree(kinfo); 1517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 1527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 1537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 1557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_tid_update - update a port TID 1567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 1577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @ti: the TID information 1587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 1597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * The new implementation as of Oct 2004 is that the driver assigns 1607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the tid and returns it to the caller. To make it easier to 1617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * catch bugs, and to reduce search time, we keep a cursor for 1627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * each port, walking the shadow tid array to find one that's not 1637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in use. 1647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 1657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * For now, if we can't allocate the full list, we fail, although 1667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in the long run, we'll allocate as many as we can, and the 1677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * caller will deal with that by trying the remaining pages later. 1687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * That means that when we fail, we have to mark the tids as not in 1697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * use again, in our shadow copy. 1707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 1717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * It's up to the caller to free the tids when they are done. 1727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We'll unlock the pages as they free them. 1737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 1747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Also, right now we are locking one page at a time, but since 1757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the intended use of this routine is for a single group of 1767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * virtually contiguous pages, that should change to improve 1777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * performance. 1787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_tid_update(struct ipath_portdata *pd, 1807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_tid_info *ti) 1817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 1827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0, ntids; 1837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 tid, porttid, cnt, i, tidcnt; 1847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u16 *tidlist; 1857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 1867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 physaddr; 1877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long vaddr; 1887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 __iomem *tidbase; 1897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long tidmap[8]; 1907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct page **pagep = NULL; 1917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow) { 1937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 1947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 1957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt = ti->tidcnt; 1987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cnt) { 1997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("After copyin, tidcnt 0, tidlist %llx\n", 2007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) ti->tidlist); 2017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 2027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Should we treat as success? likely a bug 2037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 2047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 2057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 2067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt; 2087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cnt >= tidcnt) { 2097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* make sure it all fits in port_tid_pg_list */ 2107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "Process tried to allocate %u " 2117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "TIDs, only trying max (%u)\n", cnt, tidcnt); 2127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt = tidcnt; 2137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pagep = (struct page **)pd->port_tid_pg_list; 2157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidlist = (u16 *) (&pagep[cnt]); 2167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan memset(tidmap, 0, sizeof(tidmap)); 2187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = pd->port_tidcursor; 2197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* before decrement; chip actual # */ 2207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid = pd->port_port * tidcnt; 2217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ntids = tidcnt; 2227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidbase = (u64 __iomem *) (((char __iomem *) dd->ipath_kregbase) + 2237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidbase + 2247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid * sizeof(*tidbase)); 2257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port%u %u tids, cursor %u, tidbase %p\n", 2277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, cnt, tid, tidbase); 2287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* virtual address of first page in transfer */ 2307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vaddr = ti->tidvaddr; 2317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!access_ok(VERIFY_WRITE, (void __user *) vaddr, 2327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt * PAGE_SIZE)) { 2337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Fail vaddr %p, %u pages, !access_ok\n", 2347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *)vaddr, cnt); 2357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 2367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 2377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_get_user_pages(vaddr, cnt, pagep); 2397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) { 2407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret == -EBUSY) { 2417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to lock addr %p, %u pages " 2427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(already locked)\n", 2437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) vaddr, cnt); 2447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 2457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for now, continue, and see what happens but with 2467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the new implementation, this should never happen, 2477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * unless perhaps the user has mpin'ed the pages 2487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * themselves (something we need to test) 2497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 2507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 2517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 2527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 2537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "Failed to lock addr %p, %u pages: " 2547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "errno %d\n", (void *) vaddr, cnt, -ret); 2557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 2567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < cnt; i++, vaddr += PAGE_SIZE) { 2597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (; ntids--; tid++) { 2607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (tid == tidcnt) 2617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = 0; 2627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow[porttid + tid]) 2637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 2647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ntids < 0) { 2667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 2677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * oops, wrapped all the way through their TIDs, 2687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * and didn't have enough free; see comments at 2697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * start of routine 2707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 2717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Not enough free TIDs for %u pages " 2727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(index %d), failing\n", cnt, i); 2737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan i--; /* last tidlist[i] not filled in */ 2747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 2757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 2767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidlist[i] = tid; 2787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Updating idx %u to TID %u, " 2797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "vaddr %lx\n", i, tid, vaddr); 2807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* we "know" system pages and TID pages are same size */ 2817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[porttid + tid] = pagep[i]; 2827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 2837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * don't need atomic or it's overhead 2847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 2857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan __set_bit(tid, tidmap); 2867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan physaddr = page_to_phys(pagep[i]); 2877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pagelocks++; 2887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, 2897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "TID %u, vaddr %lx, physaddr %llx pgp %p\n", 2907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid, vaddr, (unsigned long long) physaddr, 2917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pagep[i]); 2927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_f_put_tid(dd, &tidbase[tid], 1, physaddr); 2937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 2947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * don't check this tid in ipath_portshadow, since we 2957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * just filled it in; start with the next one. 2967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 2977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid++; 2987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) { 3017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 limit; 3027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cleanup: 3037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* jump here if copy out of updated info failed... */ 3047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("After failure (ret=%d), undo %d of %d entries\n", 3057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan -ret, i, cnt); 3067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* same code that's in ipath_free_tid() */ 3077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = sizeof(tidmap) * BITS_PER_BYTE; 3087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (limit > tidcnt) 3097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* just in case size changes in future */ 3107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = tidcnt; 3117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = find_first_bit((const unsigned long *)tidmap, limit); 3127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (; tid < limit; tid++) { 3137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!test_bit(tid, tidmap)) 3147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 3157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pageshadow[porttid + tid]) { 3167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Freeing TID %u\n", 3177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid); 3187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_f_put_tid(dd, &tidbase[tid], 1, 3197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_tidinvalid); 3207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[porttid + tid] = NULL; 3217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 3227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_release_user_pages(pagep, cnt); 3257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 3267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 3277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Copy the updated array, with ipath_tid's filled in, back 3287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * to user. Since we did the copy in already, this "should 3297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * never fail" If it does, we have to clean up... 3307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user((void __user *) 3327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) ti->tidlist, 3337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidlist, cnt * sizeof(*tidlist))) { 3347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 3357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto cleanup; 3367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user((void __user *) (unsigned long) ti->tidmap, 3387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidmap, sizeof tidmap)) { 3397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 3407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto cleanup; 3417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (tid == tidcnt) 3437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = 0; 3447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_tidcursor = tid; 3457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 3487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 3497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to map %u TID pages, failing with %d\n", 3507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, -ret); 3517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 3527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 3537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 3557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_tid_free - free a port TID 3567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 3577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @ti: the TID info 3587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 3597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * right now we are unlocking one page at a time, but since 3607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the intended use of this routine is for a single group of 3617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * virtually contiguous pages, that should change to improve 3627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * performance. We check that the TID is in range for this port 3637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * but otherwise don't check validity; if user has an error and 3647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * frees the wrong tid, it's only their own data that can thereby 3657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * be corrupted. We do check that the TID was in use, for sanity 3667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We always use our idea of the saved address, not the address that 3677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * they pass in to us. 3687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_tid_free(struct ipath_portdata *pd, 3717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_tid_info *ti) 3727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 3737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 3747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 tid, porttid, cnt, limit, tidcnt; 3757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 3767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 __iomem *tidbase; 3777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long tidmap[8]; 3787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow) { 3807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 3817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_from_user(tidmap, (void __user *)(unsigned long)ti->tidmap, 3857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan sizeof tidmap)) { 3867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 3877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid = pd->port_port * dd->ipath_rcvtidcnt; 3917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) + 3927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidbase + 3937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid * sizeof(*tidbase)); 3947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt; 3967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = sizeof(tidmap) * BITS_PER_BYTE; 3977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (limit > tidcnt) 3987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* just in case size changes in future */ 3997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = tidcnt; 4007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = find_first_bit(tidmap, limit); 4017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port%u free %u tids; first bit (max=%d) " 4027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "set is %d, porttid %u\n", pd->port_port, ti->tidcnt, 4037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit, tid, porttid); 4047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (cnt = 0; tid < limit; tid++) { 4057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 4067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * small optimization; if we detect a run of 3 or so without 4077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * any set, use find_first_bit again. That's mainly to 4087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * accelerate the case where we wrapped, so we have some at 4097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the beginning, and some at the end, and a big gap 4107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in the middle. 4117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!test_bit(tid, tidmap)) 4137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 4147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt++; 4157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pageshadow[porttid + tid]) { 4167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "PID %u freeing TID %u\n", 4177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pid, tid); 4187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_f_put_tid(dd, &tidbase[tid], 1, 4197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_tidinvalid); 4207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_release_user_pages( 4217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_pageshadow[porttid + tid], 1); 4227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[porttid + tid] = NULL; 4237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 4247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else 4257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Unused tid %u, ignoring\n", tid); 4267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cnt != ti->tidcnt) 4287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("passed in tidcnt %d, only %d bits set in map\n", 4297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, cnt); 4307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 4317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 4327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to unmap %u TID pages, failing with %d\n", 4337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, -ret); 4347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 4357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 4367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 4387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_set_part_key - set a partition key 4397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 4407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @key: the key 4417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 4427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We can have up to 4 active at a time (other than the default, which is 4437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * always allowed). This is somewhat tricky, since multiple ports may set 4447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the same key, so we reference count them, and clean up at exit. All 4 4457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * partition keys are packed into a single infinipath register. It's an 4467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * error for a process to set the same pkey multiple times. We provide no 4477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * mechanism to de-allocate a pkey at this time, we may eventually need to 4487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * do that. I've used the atomic operations, and no locking, and only make 4497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * a single pass through what's available. This should be more than 4507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * adequate for some time. I'll think about spinlocks or the like if and as 4517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * it's necessary. 4527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_set_part_key(struct ipath_portdata *pd, u16 key) 4547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 4557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 4567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, any = 0, pidx = -1; 4577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u16 lkey = key & 0x7FFF; 4587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 4597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (lkey == (IPS_DEFAULT_P_KEY & 0x7FFF)) { 4617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* nothing to do; this key always valid */ 4627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 4637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 4647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u try to set pkey %hx, current keys " 4677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%hx:%x %hx:%x %hx:%x %hx:%x\n", 4687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, dd->ipath_pkeys[0], 4697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[0]), dd->ipath_pkeys[1], 4707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[1]), dd->ipath_pkeys[2], 4717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[2]), dd->ipath_pkeys[3], 4727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[3])); 4737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!lkey) { 4757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "p%u tries to set key 0, not allowed\n", 4767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port); 4777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 4787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 4797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 4827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Set the full membership bit, because it has to be 4837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * set in the register or the packet, and it seems 4847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * cleaner to set in the register than to force all 4857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * callers to set it. (see bug 4331) 4867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan key |= 0x8000; 4887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) { 4907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_pkeys[i] && pidx == -1) 4917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pidx = i; 4927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_pkeys[i] == key) { 4937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u tries to set same pkey " 4947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(%x) more than once\n", 4957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key); 4967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EEXIST; 4977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 4987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pidx == -1) { 5017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("All pkeys for port %u already in use, " 5027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 5037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 5047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 5057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) { 5077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pkeys[i]) { 5087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan any++; 5097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 5107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pkeys[i] == key) { 5127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_t *pkrefs = &dd->ipath_pkeyrefs[i]; 5137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_inc_return(pkrefs) > 1) { 5157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[pidx] = key; 5167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u set key %x " 5177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "matches #%d, count now %d\n", 5187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, i, 5197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(pkrefs)); 5207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 5217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 5227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 5237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 5247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * lost race, decrement count, catch below 5257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 5267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_dec(pkrefs); 5277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Lost race, count was " 5287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "0, after dec, it's %d\n", 5297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(pkrefs)); 5307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan any++; 5317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) { 5347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 5357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * It makes no sense to have both the limited and 5367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * full membership PKEY set at the same time since 5377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the unlimited one will disable the limited one. 5387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 5397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EEXIST; 5407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 5417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!any) { 5447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u, all pkeys already in use, " 5457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 5467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 5477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 5487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) { 5507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pkeys[i] && 5517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) { 5527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pkey; 5537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for ipathstats, etc. */ 5557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pkeys[i] = lkey; 5567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[pidx] = dd->ipath_pkeys[i] = key; 5577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pkey = 5587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (u64) dd->ipath_pkeys[0] | 5597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 5607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 5617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 5627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "p%u set key %x in #%d, " 5637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "portidx %d, new pkey reg %llx\n", 5647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, i, pidx, 5657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pkey); 5667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg( 5677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd, dd->ipath_kregs->kr_partitionkey, pkey); 5687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 5707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 5717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u, all pkeys already in use 2nd pass, " 5747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 5757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 5767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 5787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 5797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 5807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 5827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_manage_rcvq - manage a port's receive queue 5837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 5847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @start_stop: action to carry out 5857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 5867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * start_stop == 0 disables receive on the port, for use in queue 5877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * overflow conditions. start_stop==1 re-enables, to be used to 5887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * re-init the software copy of the head register 5897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 5907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_manage_rcvq(struct ipath_portdata *pd, int start_stop) 5917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 5927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 5937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 tval; 5947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%sabling rcv for unit %u port %u\n", 5967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan start_stop ? "en" : "dis", dd->ipath_unit, 5977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port); 5987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* atomically clear receive enable port. */ 5997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (start_stop) { 6007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 6017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * On enable, force in-memory copy of the tail register to 6027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 0, so that protocol code doesn't have to worry about 6037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * whether or not the chip has yet updated the in-memory 6047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * copy or not on return from the system call. The chip 6057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * always resets it's tail register back to 0 on a 6067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * transition from disabled to enabled. This could cause a 6077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * problem if software was broken, and did the enable w/o 6087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the disable, but eventually the in-memory copy will be 6097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * updated and correct itself, even in the face of software 6107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * bugs. 6117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *pd->port_rcvhdrtail_kvaddr = 0; 6137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan set_bit(INFINIPATH_R_PORTENABLE_SHIFT + pd->port_port, 6147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_rcvctrl); 6157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else 6167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan clear_bit(INFINIPATH_R_PORTENABLE_SHIFT + pd->port_port, 6177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_rcvctrl); 6187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 6197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl); 6207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* now be sure chip saw it before we return */ 6217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tval = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); 6227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (start_stop) { 6237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 6247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * And try to be sure that tail reg update has happened too. 6257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This should in theory interlock with the RXE changes to 6267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the tail register. Don't assign it to the tail register 6277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in memory copy, since we could overwrite an update by the 6287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * chip if we did. 6297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tval = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); 6317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* always; new head should be equal to new tail; see above */ 6337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return 0; 6347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 6357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void ipath_clean_part_key(struct ipath_portdata *pd, 6377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd) 6387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 6397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, j, pchanged = 0; 6407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 oldpkey; 6417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for debugging only */ 6437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan oldpkey = (u64) dd->ipath_pkeys[0] | 6447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 6457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 6467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 6477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) { 6497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_pkeys[i]) 6507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 6517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "look for key[%d] %hx in pkeys\n", i, 6527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i]); 6537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (j = 0; j < ARRAY_SIZE(dd->ipath_pkeys); j++) { 6547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* check for match independent of the global bit */ 6557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((dd->ipath_pkeys[j] & 0x7fff) != 6567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (pd->port_pkeys[i] & 0x7fff)) 6577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 6587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_dec_and_test(&dd->ipath_pkeyrefs[j])) { 6597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u clear key " 6607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%x matches #%d\n", 6617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, 6627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i], j); 6637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pkeys[j] = 6647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pkeys[j] = 0; 6657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pchanged++; 6667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else ipath_cdbg( 6687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan VERBOSE, "p%u key %x matches #%d, " 6697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "but ref still %d\n", pd->port_port, 6707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i], j, 6717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[j])); 6727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 6737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i] = 0; 6757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pchanged) { 6777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pkey = (u64) dd->ipath_pkeys[0] | 6787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 6797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 6807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 6817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u old pkey reg %llx, " 6827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "new pkey reg %llx\n", pd->port_port, 6837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) oldpkey, 6847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pkey); 6857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey, 6867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pkey); 6877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 6897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 6917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_create_user_egr - allocate eager TID buffers 6927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port to allocate TID buffers for 6937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 6947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This routine is now quite different for user and kernel, because 6957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the kernel uses skb's, for the accelerated network performance 6967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This is the user port version 6977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 6987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Allocate the eager TID buffers and program them into infinipath 6997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * They are no longer completely contiguous, we do multiple allocation 7007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * calls. 7017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 7027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_create_user_egr(struct ipath_portdata *pd) 7037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 7047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 7057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned e, egrcnt, alloced, egrperchunk, chunk, egrsize, egroff; 7067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t size; 7077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 7080ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan gfp_t gfp_flags; 7090ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan 7100ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan /* 7110ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * GFP_USER, but without GFP_FS, so buffer cache can be 7120ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * coalesced (we hope); otherwise, even at order 4, 7130ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * heavy filesystem activity makes these fail, and we can 7140ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * use compound pages. 7150ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan */ 7160ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan gfp_flags = __GFP_WAIT | __GFP_IO | __GFP_COMP; 7177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egrcnt = dd->ipath_rcvegrcnt; 7197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* TID number offset for this port */ 7207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egroff = pd->port_port * egrcnt; 7217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egrsize = dd->ipath_rcvegrbufsize; 7227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Allocating %d egr buffers, at egrtid " 7237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "offset %x, egrsize %u\n", egrcnt, egroff, egrsize); 7247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 7267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * to avoid wasting a lot of memory, we allocate 32KB chunks of 7277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * physically contiguous memory, advance through it until used up 7287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * and then allocate more. Of course, we need memory to store those 7297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * extra pointers, now. Started out with 256KB, but under heavy 7307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * memory pressure (creating large files and then copying them over 7317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * NFS while doing lots of MPI jobs), we hit some allocation 7327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * failures, even though we can sleep... (2.6.10) Still get 7330ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * failures at 64K. 32K is the lowest we can go without wasting 7340ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * additional memory. 7357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 7367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size = 0x8000; 7377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan alloced = ALIGN(egrsize * egrcnt, size); 7387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egrperchunk = size / egrsize; 7397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan chunk = (egrcnt + egrperchunk - 1) / egrperchunk; 7407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_chunks = chunk; 7417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbufs_perchunk = egrperchunk; 7427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_size = size; 7437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf = vmalloc(chunk * sizeof(pd->port_rcvegrbuf[0])); 7447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf) { 7457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 7467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 7477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys = 7497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vmalloc(chunk * sizeof(pd->port_rcvegrbuf_phys[0])); 7507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf_phys) { 7517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 7527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail_rcvegrbuf; 7537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) { 7557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf[e] = dma_alloc_coherent( 7577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->pcidev->dev, size, &pd->port_rcvegrbuf_phys[e], 7587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan gfp_flags); 7597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf[e]) { 7617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 7627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail_rcvegrbuf_phys; 7637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegr_phys = pd->port_rcvegrbuf_phys[0]; 7677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = chunk = 0; chunk < pd->port_rcvegrbuf_chunks; chunk++) { 7697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dma_addr_t pa = pd->port_rcvegrbuf_phys[chunk]; 7707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned i; 7717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; e < egrcnt && i < egrperchunk; e++, i++) { 7737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_f_put_tid(dd, e + egroff + 7747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (u64 __iomem *) 7757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((char __iomem *) 7767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_kregbase + 7777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvegrbase), 0, pa); 7787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pa += egrsize; 7797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cond_resched(); /* don't hog the cpu */ 7817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 7847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 7857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail_rcvegrbuf_phys: 7877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = 0; e < pd->port_rcvegrbuf_chunks && 7887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf[e]; e++) 7897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dma_free_coherent(&dd->pcidev->dev, size, 7907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf[e], 7917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys[e]); 7927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vfree(pd->port_rcvegrbuf_phys); 7947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys = NULL; 7957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail_rcvegrbuf: 7967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vfree(pd->port_rcvegrbuf); 7977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf = NULL; 7987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 7997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 8007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 8017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_do_user_init(struct ipath_portdata *pd, 8037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_user_info *uinfo) 8047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 8057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 8067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 8077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 physaddr, uaddr, off, atmp; 8087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct page *pagep; 8097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 head32; 8107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 head; 8117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for now, if major version is different, bail */ 8137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((uinfo->spu_userversion >> 16) != IPATH_USER_SWMAJOR) { 8147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 8157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "User major version %d not same as driver " 8167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "major %d\n", uinfo->spu_userversion >> 16, 8177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan IPATH_USER_SWMAJOR); 8187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENODEV; 8197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 8207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((uinfo->spu_userversion & 0xffff) != IPATH_USER_SWMINOR) 8237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("User minor version %d not same as driver " 8247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "minor %d\n", uinfo->spu_userversion & 0xffff, 8257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan IPATH_USER_SWMINOR); 8267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (uinfo->spu_rcvhdrsize) { 8287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_setrcvhdrsize(dd, uinfo->spu_rcvhdrsize); 8297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 8307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 8317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for now we do nothing with rcvhdrcnt: uinfo->spu_rcvhdrcnt */ 8347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* set up for the rcvhdr Q tail register writeback to user memory */ 8367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!uinfo->spu_rcvhdraddr || 8377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan !access_ok(VERIFY_WRITE, (u64 __user *) (unsigned long) 8387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan uinfo->spu_rcvhdraddr, sizeof(u64))) { 8397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Port %d rcvhdrtail addr %llx not valid\n", 8407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, 8417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) uinfo->spu_rcvhdraddr); 8427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 8437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 8447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan off = offset_in_page(uinfo->spu_rcvhdraddr); 8477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan uaddr = PAGE_MASK & (unsigned long) uinfo->spu_rcvhdraddr; 8487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_get_user_pages_nocopy(uaddr, &pagep); 8497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) { 8507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "Failed to lookup and lock " 8517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "address %llx for rcvhdrtail: errno %d\n", 8527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) uinfo->spu_rcvhdraddr, -ret); 8537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 8547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pagelocks++; 8567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvhdrtail_uaddr = uaddr; 8577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvhdrtail_pagep = pagep; 8587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvhdrtail_kvaddr = 8597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan page_address(pagep); 8607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvhdrtail_kvaddr += off; 8617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan physaddr = page_to_phys(pagep) + off; 8627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "port %d user addr %llx hdrtailaddr, %llx " 8637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "physical (off=%llx)\n", 8647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, 8657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) uinfo->spu_rcvhdraddr, 8667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) physaddr, (unsigned long long) off); 8677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdrtailaddr, 8687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, physaddr); 8697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atmp = ipath_read_kreg64_port(dd, 8707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_kregs->kr_rcvhdrtailaddr, 8717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port); 8727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (physaddr != atmp) { 8737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, 8747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "Catastrophic software error, " 8757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "RcvHdrTailAddr%u written as %llx, " 8767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "read back as %llx\n", pd->port_port, 8777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) physaddr, 8787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) atmp); 8797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 8807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 8817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for right now, kernel piobufs are at end, so port 1 is at 0 */ 8847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_piobufs = dd->ipath_piobufbase + 8857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pbufsport * (pd->port_port - 8867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1) * dd->ipath_palign; 8877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Set base of piobufs for port %u to 0x%x\n", 8887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, pd->port_piobufs); 8897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 8917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Now allocate the rcvhdr Q and eager TIDs; skip the TID 8927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * array for time being. If pd->port_port > chip-supported, 8937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * we need to do extra stuff here to handle by handling overflow 8947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * through port 0, someday 8957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 8967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_create_rcvhdrq(dd, pd); 8977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!ret) 8987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_create_user_egr(pd); 8997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 9007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 9017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* enable receives now */ 9027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* atomically set enable bit for this port */ 9037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan set_bit(INFINIPATH_R_PORTENABLE_SHIFT + pd->port_port, 9047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_rcvctrl); 9057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 9077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * set the head registers for this port to the current values 9087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * of the tail pointers, since we don't know if they were 9097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * updated on last use of the port. 9107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 9117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan head32 = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); 9127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan head = (u64) head32; 9137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_ureg(dd, ur_rcvhdrhead, head, pd->port_port); 9147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan head32 = ipath_read_ureg32(dd, ur_rcvegrindextail, pd->port_port); 9157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_ureg(dd, ur_rcvegrindexhead, head32, pd->port_port); 9167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_lastegrheads[pd->port_port] = -1; 9177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_lastrcvhdrqtails[pd->port_port] = -1; 9187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Wrote port%d head %llx, egrhead %x from " 9197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "tail regs\n", pd->port_port, 9207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) head, head32); 9217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_tidcursor = 0; /* start at beginning after open */ 9227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 9237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * now enable the port; the tail registers will be written to memory 9247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * by the chip as soon as it sees the write to 9257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * dd->ipath_kregs->kr_rcvctrl. The update only happens on 9267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * transition from 0 to 1, so clear it first, then set it as part of 9277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * enabling the port. This will (very briefly) affect any other 9287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * open ports, but it shouldn't be long enough to be an issue. 9297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 9307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 9317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl & ~INFINIPATH_R_TAILUPD); 9327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 9337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl); 9347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 9367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 9377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 9387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_ureg(struct vm_area_struct *vma, struct ipath_devdata *dd, 9407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 ureg) 9417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 9427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long phys; 9437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 9447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* it's the real hardware, so io_remap works */ 9467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > PAGE_SIZE) { 9487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL mmap userreg: reqlen " 9497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%lx > PAGE\n", vma->vm_end - vma->vm_start); 9507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 9517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 9527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys = dd->ipath_physaddr + ureg; 9537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 9547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; 9567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = io_remap_pfn_range(vma, vma->vm_start, 9577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys >> PAGE_SHIFT, 9587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 9597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot); 9607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 9627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 9637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_piobufs(struct vm_area_struct *vma, 9657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd, 9667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd) 9677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 9687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long phys; 9697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 9707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 9727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * When we map the PIO buffers, we want to map them as writeonly, no 9737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * read possible. 9747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 9757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > 9777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (dd->ipath_pbufsport * dd->ipath_palign)) { 9787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL mmap piobufs: " 9797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "reqlen %lx > PAGE\n", 9807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start); 9817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 9827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 9837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys = dd->ipath_physaddr + pd->port_piobufs; 9867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 9877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Do *NOT* mark this as non-cached (PWT bit), or we don't get the 9887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * write combining behavior we want on the PIO buffers! 9897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * vma->vm_page_prot = 9907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * pgprot_noncached(vma->vm_page_prot); 9917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 9927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (vma->vm_flags & VM_READ) { 9947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 9957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "Can't map piobufs as readable (flags=%lx)\n", 9967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags); 9977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EPERM; 9987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 9997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* don't allow them to later change to readable with mprotect */ 10027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags &= ~VM_MAYWRITE; 10047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; 10057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = io_remap_pfn_range(vma, vma->vm_start, phys >> PAGE_SHIFT, 10077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 10087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot); 10097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 10107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 10117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 10127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_rcvegrbufs(struct vm_area_struct *vma, 10147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd) 10157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 10177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long start, size; 10187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t total_size, i; 10197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dma_addr_t *phys; 10207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 10217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf) { 10237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 10247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size = pd->port_rcvegrbuf_size; 10287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan total_size = pd->port_rcvegrbuf_chunks * size; 10297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > total_size) { 10307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL on egr bufs: " 10317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "reqlen %lx > actual %lx\n", 10327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 10337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) total_size); 10347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 10357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (vma->vm_flags & VM_WRITE) { 10397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "Can't map eager buffers as " 10407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "writable (flags=%lx)\n", vma->vm_flags); 10417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EPERM; 10427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan start = vma->vm_start; 10467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys = pd->port_rcvegrbuf_phys; 10477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* don't allow them to later change to writeable with mprotect */ 10497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags &= ~VM_MAYWRITE; 10507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < pd->port_rcvegrbuf_chunks; i++, start += size) { 10527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = remap_pfn_range(vma, start, phys[i] >> PAGE_SHIFT, 10537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size, vma->vm_page_prot); 10547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 10557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 10587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 10607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 10617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 10627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_rcvhdrq(struct vm_area_struct *vma, 10647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd) 10657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 10677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t total_size; 10687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 10697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 10717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * kmalloc'ed memory, physically contiguous; this is from 10727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * spi_rcvhdr_base; we allow user to map read-write so they can 10737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * write hdrq entries to allow protocol code to directly poll 10747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * whether a hdrq entry has been written. 10757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 10767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan total_size = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize * 10777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan sizeof(u32), PAGE_SIZE); 10787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > total_size) { 10797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 10807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "FAIL on rcvhdrq: reqlen %lx > actual %lx\n", 10817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 10827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) total_size); 10837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 10847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = remap_pfn_range(vma, vma->vm_start, 10887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvhdrq_phys >> PAGE_SHIFT, 10897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 10907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot); 10917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 10927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 10937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 10947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_pioavailregs(struct vm_area_struct *vma, 10967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd) 10977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 10997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 11007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 11027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * when we map the PIO bufferavail registers, we want to map them as 11037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * readonly, no write possible. 11047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 11057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * kmalloc'ed memory, physically contiguous, one page only, readonly 11067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 11077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > PAGE_SIZE) { 11097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL on pioavailregs_dma: " 11107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "reqlen %lx > actual %lx\n", 11117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 11127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) PAGE_SIZE); 11137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 11147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 11157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 11167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (vma->vm_flags & VM_WRITE) { 11187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 11197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "Can't map pioavailregs as writable (flags=%lx)\n", 11207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags); 11217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EPERM; 11227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 11237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 11247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* don't allow them to later change with mprotect */ 11267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags &= ~VM_MAYWRITE; 11277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = remap_pfn_range(vma, vma->vm_start, 11297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pioavailregs_phys >> PAGE_SHIFT, 11307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan PAGE_SIZE, vma->vm_page_prot); 11317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 11327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 11337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 11347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 11367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_mmap - mmap various structures into user space 11377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @fp: the file pointer 11387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @vma: the VM area 11397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 11407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We use this to have a shared buffer between the kernel and the user code 11417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for the rcvhdr queue, egr buffers, and the per-port user regs and pio 11427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * buffers in the chip. We have the open and close entries so we can bump 11437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the ref count and keep the driver from being unloaded while still mapped. 11447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 11457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_mmap(struct file *fp, struct vm_area_struct *vma) 11467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 11477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 11487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 11497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pgaddr, ureg; 11507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 11517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 11537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 11547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 11557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This is the ipath_do_user_init() code, mapping the shared buffers 11567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * into the user process. The address referred to by vm_pgoff is the 11577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * virtual, not physical, address; we only do one mmap for each 11587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * space mapped. 11597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 11607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pgaddr = vma->vm_pgoff << PAGE_SHIFT; 11617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 11637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * note that ureg does *NOT* have the kregvirt as part of it, to be 11647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * sure that for 32 bit programs, we don't end up trying to map a > 11657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 44 address. Has to match ipath_get_base_info() code that sets 11667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * __spi_uregbase 11677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 11687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ureg = dd->ipath_uregbase + dd->ipath_palign * pd->port_port; 11707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11710ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan ipath_cdbg(MM, "pgaddr %llx vm_start=%lx len %lx port %u:%u\n", 11727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pgaddr, vma->vm_start, 11730ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan vma->vm_end - vma->vm_start, dd->ipath_unit, 11740ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan pd->port_port); 11757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pgaddr == ureg) 11777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_ureg(vma, dd, ureg); 11787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else if (pgaddr == pd->port_piobufs) 11797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_piobufs(vma, dd, pd); 11807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else if (pgaddr == (u64) pd->port_rcvegr_phys) 11817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_rcvegrbufs(vma, pd); 11827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else if (pgaddr == (u64) pd->port_rcvhdrq_phys) 11837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_rcvhdrq(vma, pd); 11847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else if (pgaddr == dd->ipath_pioavailregs_phys) 11857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_pioavailregs(vma, pd); 11867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else 11877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 11887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_private_data = NULL; 11907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 11927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 11937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "Failure %d on addr %lx, off %lx\n", 11947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan -ret, vma->vm_start, vma->vm_pgoff); 11957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 11977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 11987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic unsigned int ipath_poll(struct file *fp, 12007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct poll_table_struct *pt) 12017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 12027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 12037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 head, tail; 12047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int bit; 12057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 12067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 12087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 12097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan bit = pd->port_port + INFINIPATH_R_INTRAVAIL_SHIFT; 12117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan set_bit(bit, &dd->ipath_rcvctrl); 12127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 12147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Before blocking, make sure that head is still == tail, 12157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * reading from the chip, so we can be sure the interrupt 12167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * enable has made it to the chip. If not equal, disable 12177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * interrupt again and return immediately. This avoids races, 12187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * and the overhead of the chip read doesn't matter much at 12197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * this point, since we are waiting for something anyway. 12207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 12237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl); 12247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan head = ipath_read_ureg32(dd, ur_rcvhdrhead, pd->port_port); 12267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tail = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); 12277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (tail == head) { 12297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan set_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag); 12309dcc0e58e2913f7e6ffba64c27fe5c2f2c7b845cBryan O'Sullivan if(dd->ipath_rhdrhead_intr_off) /* arm rcv interrupt */ 12319dcc0e58e2913f7e6ffba64c27fe5c2f2c7b845cBryan O'Sullivan (void)ipath_write_ureg(dd, ur_rcvhdrhead, 12329dcc0e58e2913f7e6ffba64c27fe5c2f2c7b845cBryan O'Sullivan dd->ipath_rhdrhead_intr_off 12339dcc0e58e2913f7e6ffba64c27fe5c2f2c7b845cBryan O'Sullivan | head, pd->port_port); 12347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan poll_wait(fp, &pd->port_wait, pt); 12357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (test_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag)) { 12377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* timed out, no packets received */ 12387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan clear_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag); 12397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvwait_to++; 12407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 12417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 12427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else { 12437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* it's already happened; don't do wait_event overhead */ 12447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvnowait++; 12457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 12467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan clear_bit(bit, &dd->ipath_rcvctrl); 12487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 12497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl); 12507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return 0; 12527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 12537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int try_alloc_port(struct ipath_devdata *dd, int port, 12557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct file *fp) 12567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 12577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 12587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pd[port]) { 12607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan void *p, *ptmp; 12617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan p = kzalloc(sizeof(struct ipath_portdata), GFP_KERNEL); 12637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 12657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Allocate memory for use in ipath_tid_update() just once 12667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * at open, not per call. Reduces cost of expected send 12677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * setup. 12687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ptmp = kmalloc(dd->ipath_rcvtidcnt * sizeof(u16) + 12707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidcnt * sizeof(struct page **), 12717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan GFP_KERNEL); 12727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!p || !ptmp) { 12737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Unable to allocate portdata " 12747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "memory, failing open\n"); 12757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 12767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kfree(p); 12777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kfree(ptmp); 12787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 12797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 12807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port] = p; 12817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_port = port; 12827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_dd = dd; 12837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_tid_pg_list = ptmp; 12847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan init_waitqueue_head(&dd->ipath_pd[port]->port_wait); 12857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 12867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pd[port]->port_cnt) { 12877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_cnt = 1; 12887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan fp->private_data = (void *) dd->ipath_pd[port]; 12897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] opened unit:port %u:%u\n", 12907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, dd->ipath_unit, 12917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan port); 12927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_pid = current->pid; 12937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan strncpy(dd->ipath_pd[port]->port_comm, current->comm, 12947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan sizeof(dd->ipath_pd[port]->port_comm)); 12957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_ports++; 12967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 12977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 12987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 12997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 13007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 13027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 13037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 13047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic inline int usable(struct ipath_devdata *dd) 13067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 13077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return dd && 13087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (dd->ipath_flags & IPATH_PRESENT) && 13097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_kregbase && 13107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_lid && 13117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan !(dd->ipath_flags & (IPATH_LINKDOWN | IPATH_DISABLED 13127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan | IPATH_LINKUNK)); 13137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 13147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int find_free_port(int unit, struct file *fp) 13167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 13177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(unit); 13187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret, i; 13197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd) { 13217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENODEV; 13227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 13237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!usable(dd)) { 13267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENETDOWN; 13277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 13287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < dd->ipath_cfgports; i++) { 13317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = try_alloc_port(dd, i, fp); 13327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret != -EBUSY) 13337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 13347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 13367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 13387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 13397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 13407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int find_best_unit(struct file *fp) 13427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 13437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0, i, prefunit = -1, devmax; 13447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int maxofallports, npresent, nup; 13457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ndev; 13467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void) ipath_count_units(&npresent, &nup, &maxofallports); 13487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 13507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This code is present to allow a knowledgeable person to 13517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * specify the layout of processes to processors before opening 13527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * this driver, and then we'll assign the process to the "closest" 13537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * HT-400 to that processor (we assume reasonable connectivity, 13547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for now). This code assumes that if affinity has been set 13557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * before this point, that at most one cpu is set; for now this 13567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * is reasonable. I check for both cpus_empty() and cpus_full(), 13577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in case some kernel variant sets none of the bits when no 13587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * affinity is set. 2.6.11 and 12 kernels have all present 13597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * cpus set. Some day we'll have to fix it up further to handle 13607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * a cpu subset. This algorithm fails for two HT-400's connected 13617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in tunnel fashion. Eventually this needs real topology 13627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * information. There may be some issues with dual core numbering 13637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * as well. This needs more work prior to release. 13647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 13657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cpus_empty(current->cpus_allowed) && 13667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan !cpus_full(current->cpus_allowed)) { 13677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ncpus = num_online_cpus(), curcpu = -1; 13687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ncpus; i++) 13697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cpu_isset(i, current->cpus_allowed)) { 13707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] affinity set for " 13717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "cpu %d\n", current->comm, 13727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->pid, i); 13737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan curcpu = i; 13747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (curcpu != -1) { 13767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (npresent) { 13777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit = curcpu / (ncpus / npresent); 13787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("%s[%u] %d chips, %d cpus, " 13797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%d cpus/chip, select unit %d\n", 13807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, 13817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan npresent, ncpus, ncpus / npresent, 13827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit); 13837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 13887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * user ports start at 1, kernel port is 0 13897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * For now, we do round-robin access across all chips 13907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 13917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (prefunit != -1) 13937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan devmax = prefunit + 1; 13947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else 13957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan devmax = ipath_count_units(NULL, NULL, NULL); 13967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanrecheck: 13977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 1; i < maxofallports; i++) { 13987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (ndev = prefunit != -1 ? prefunit : 0; ndev < devmax; 13997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ndev++) { 14007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(ndev); 14017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!usable(dd)) 14037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; /* can't use this unit */ 14047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (i >= dd->ipath_cfgports) 14057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 14067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Maxed out on users of this unit. Try 14077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * next. 14087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 14097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 14107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = try_alloc_port(dd, i, fp); 14117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!ret) 14127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 14137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 14147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 14157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (npresent) { 14177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (nup == 0) { 14187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENETDOWN; 14197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No ports available (none initialized " 14207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "and ready)\n"); 14217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 14227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (prefunit > 0) { 14237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* if started above 0, retry from 0 */ 14247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, 14257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%s[%u] no ports on prefunit " 14267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%d, clear and re-check\n", 14277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, 14287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit); 14297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan devmax = ipath_count_units(NULL, NULL, 14307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan NULL); 14317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit = -1; 14327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto recheck; 14337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 14347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 14357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No ports available\n"); 14367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 14377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 14387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENXIO; 14397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No boards found\n"); 14407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 14417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 14437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 14447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 14457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_open(struct inode *in, struct file *fp) 14477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 1448a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan int ret, user_minor; 14497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_lock(&ipath_mutex); 14517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1452a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan user_minor = iminor(in) - IPATH_USER_MINOR_BASE; 14537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "open on dev %lx (minor %d)\n", 1454a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan (long)in->i_rdev, user_minor); 14557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1456a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan if (user_minor) 1457a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan ret = find_free_port(user_minor - 1, fp); 14587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else 14597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = find_best_unit(fp); 14607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_unlock(&ipath_mutex); 14627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 14637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 14647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 14667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * unlock_exptid - unlock any expected TID entries port still had in use 14677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: port 14687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 14697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We don't actually update the chip here, because we do a bulk update 14707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * below, using ipath_f_clear_tids. 14717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 14727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void unlock_expected_tids(struct ipath_portdata *pd) 14737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 14747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 14757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int port_tidbase = pd->port_port * dd->ipath_rcvtidcnt; 14767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, cnt = 0, maxtid = port_tidbase + dd->ipath_rcvtidcnt; 14777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port %u unlocking any locked expTID pages\n", 14797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port); 14807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = port_tidbase; i < maxtid; i++) { 14817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow[i]) 14827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 14837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_release_user_pages_on_close(&dd->ipath_pageshadow[i], 14857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1); 14867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[i] = NULL; 14877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt++; 14887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 14897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 14907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cnt) 14917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port %u locked %u expTID entries\n", 14927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, cnt); 14937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ipath_stats.sps_pagelocks || ipath_stats.sps_pageunlocks) 14957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "%llu pages locked, %llu unlocked\n", 14967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) ipath_stats.sps_pagelocks, 14977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) 14987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks); 14997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 15007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_close(struct inode *in, struct file *fp) 15027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 15037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 15047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 15057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 15067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned port; 15077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "close on dev %lx, private data %p\n", 15097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (long)in->i_rdev, fp->private_data); 15107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_lock(&ipath_mutex); 15127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 15147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan port = pd->port_port; 15157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan fp->private_data = NULL; 15167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 15177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_hdrqfull) { 15197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] had %u rcvhdrqfull errors " 15207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "during run\n", pd->port_comm, pd->port_pid, 15217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_hdrqfull); 15227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_hdrqfull = 0; 15237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_rcvwait_to || pd->port_piowait_to 15267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan || pd->port_rcvnowait || pd->port_pionowait) { 15277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "port%u, %u rcv, %u pio wait timeo; " 15287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%u rcv %u, pio already\n", 15297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, pd->port_rcvwait_to, 15307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_piowait_to, pd->port_rcvnowait, 15317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pionowait); 15327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvwait_to = pd->port_piowait_to = 15337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvnowait = pd->port_pionowait = 0; 15347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_flag) { 15367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u port_flag still set to 0x%lx\n", 15377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, pd->port_flag); 15387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_flag = 0; 15397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_kregbase) { 15427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_rcvhdrtail_uaddr) { 15437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvhdrtail_uaddr = 0; 15447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvhdrtail_kvaddr = NULL; 15457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_release_user_pages_on_close( 15467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &pd->port_rcvhdrtail_pagep, 1); 15477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvhdrtail_pagep = NULL; 15487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 15497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg_port( 15517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd, dd->ipath_kregs->kr_rcvhdrtailaddr, 15527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan port, 0ULL); 15537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg_port( 15547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd, dd->ipath_kregs->kr_rcvhdraddr, 15557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, 0); 15567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* clean up the pkeys for this port user */ 15587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_clean_part_key(pd, dd); 15597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (port < dd->ipath_cfgports) { 15617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i = dd->ipath_pbufsport * (port - 1); 15627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_disarm_piobufs(dd, i, dd->ipath_pbufsport); 15637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* atomically clear receive enable port. */ 15657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan clear_bit(INFINIPATH_R_PORTENABLE_SHIFT + port, 15667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_rcvctrl); 15677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg( 15687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd, 15697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_kregs->kr_rcvctrl, 15707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl); 15717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pageshadow) 15737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unlock_expected_tids(pd); 15747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_ports--; 15757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] closed port %u:%u\n", 15767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_comm, pd->port_pid, 15777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_unit, port); 15787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_cnt = 0; 15827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pid = 0; 15837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_f_clear_tids(dd, pd->port_port); 15857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_free_pddata(dd, pd->port_port, 0); 15877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_unlock(&ipath_mutex); 15897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 15917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 15927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_port_info(struct ipath_portdata *pd, 15947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_port_info __user *uinfo) 15957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 15967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_port_info info; 15977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int nup; 15987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 15997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void) ipath_count_units(NULL, &nup, NULL); 16017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.num_active = nup; 16027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.unit = pd->port_dd->ipath_unit; 16037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.port = pd->port_port; 16047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user(uinfo, &info, sizeof(info))) { 16067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 16077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 16107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 16127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 16137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 16147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic ssize_t ipath_write(struct file *fp, const char __user *data, 16167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t count, loff_t *off) 16177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 16187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_cmd __user *ucmd; 16197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 16207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const void __user *src; 16217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t consumed, copy; 16227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_cmd cmd; 16237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ssize_t ret = 0; 16247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan void *dest; 16257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (count < sizeof(cmd.type)) { 16277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 16287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ucmd = (const struct ipath_cmd __user *) data; 16327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_from_user(&cmd.type, &ucmd->type, sizeof(cmd.type))) { 16347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 16357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan consumed = sizeof(cmd.type); 16397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan switch (cmd.type) { 16417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_USER_INIT: 16427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.user_info); 16437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.user_info; 16447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.user_info; 16457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 16467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_RECV_CTRL: 16477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.recv_ctrl); 16487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.recv_ctrl; 16497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.recv_ctrl; 16507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 16517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_PORT_INFO: 16527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.port_info); 16537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.port_info; 16547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.port_info; 16557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 16567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_UPDATE: 16577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_FREE: 16587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.tid_info); 16597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.tid_info; 16607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.tid_info; 16617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 16627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_SET_PART_KEY: 16637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.part_key); 16647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.part_key; 16657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.part_key; 16667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 16677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan default: 16687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 16697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((count - consumed) < copy) { 16737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 16747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_from_user(dest, src, copy)) { 16787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 16797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan consumed += copy; 16837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 16847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan switch (cmd.type) { 16867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_USER_INIT: 16877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_do_user_init(pd, &cmd.cmd.user_info); 16887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 16897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_get_base_info( 16917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd, (void __user *) (unsigned long) 16927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cmd.cmd.user_info.spu_base_info, 16937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cmd.cmd.user_info.spu_base_info_size); 16947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 16957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_RECV_CTRL: 16967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_manage_rcvq(pd, cmd.cmd.recv_ctrl); 16977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 16987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_PORT_INFO: 16997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_port_info(pd, 17007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (struct ipath_port_info __user *) 17017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) cmd.cmd.port_info); 17027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 17037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_UPDATE: 17047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_tid_update(pd, &cmd.cmd.tid_info); 17057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 17067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_FREE: 17077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_tid_free(pd, &cmd.cmd.tid_info); 17087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 17097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_SET_PART_KEY: 17107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_set_part_key(pd, cmd.cmd.part_key); 17117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 17127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret >= 0) 17157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = consumed; 17167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 17187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 17197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 17207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct class *ipath_class; 17227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int init_cdev(int minor, char *name, struct file_operations *fops, 17247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct cdev **cdevp, struct class_device **class_devp) 17257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 17267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const dev_t dev = MKDEV(IPATH_MAJOR, minor); 17277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct cdev *cdev = NULL; 17287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device *class_dev = NULL; 17297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 17307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev = cdev_alloc(); 17327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cdev) { 17337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME 17347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ": Could not allocate cdev for minor %d, %s\n", 17357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name); 17367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 17377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 17387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev->owner = THIS_MODULE; 17417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev->ops = fops; 17427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kobject_set_name(&cdev->kobj, name); 17437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = cdev_add(cdev, dev, 1); 17457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 17467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME 17477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ": Could not add cdev for minor %d, %s (err %d)\n", 17487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name, -ret); 17497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto err_cdev; 17507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan class_dev = class_device_create(ipath_class, NULL, dev, NULL, name); 17537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (IS_ERR(class_dev)) { 17557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = PTR_ERR(class_dev); 17567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not create " 17577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "class_dev for minor %d, %s (err %d)\n", 17587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name, -ret); 17597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto err_cdev; 17607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 17637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanerr_cdev: 17657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev_del(cdev); 17667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev = NULL; 17677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 17697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret >= 0) { 17707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = cdev; 17717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *class_devp = class_dev; 17727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 17737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = NULL; 17747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *class_devp = NULL; 17757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 17787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 17797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanint ipath_cdev_init(int minor, char *name, struct file_operations *fops, 17817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct cdev **cdevp, struct class_device **class_devp) 17827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 17837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return init_cdev(minor, name, fops, cdevp, class_devp); 17847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 17857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void cleanup_cdev(struct cdev **cdevp, 17877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device **class_devp) 17887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 17897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device *class_dev = *class_devp; 17907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (class_dev) { 17927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan class_device_unregister(class_dev); 17937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *class_devp = NULL; 17947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (*cdevp) { 17977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev_del(*cdevp); 17987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = NULL; 17997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 18007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 18017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanvoid ipath_cdev_cleanup(struct cdev **cdevp, 18037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device **class_devp) 18047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 18057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cleanup_cdev(cdevp, class_devp); 18067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 18077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct cdev *wildcard_cdev; 18097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct class_device *wildcard_class_dev; 18107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic const dev_t dev = MKDEV(IPATH_MAJOR, 0); 18127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int user_init(void) 18147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 18157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 18167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = register_chrdev_region(dev, IPATH_NMINORS, IPATH_DRV_NAME); 18187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 18197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not register " 18207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "chrdev region (err %d)\n", -ret); 18217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 18227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 18237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_class = class_create(THIS_MODULE, IPATH_DRV_NAME); 18257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (IS_ERR(ipath_class)) { 18277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = PTR_ERR(ipath_class); 18287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not create " 18297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "device class (err %d)\n", -ret); 18307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 18317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 18327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 18347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 18357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unregister_chrdev_region(dev, IPATH_NMINORS); 18367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 18377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 18387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 18397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void user_cleanup(void) 18417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 18427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ipath_class) { 18437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan class_destroy(ipath_class); 18447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_class = NULL; 18457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 18467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unregister_chrdev_region(dev, IPATH_NMINORS); 18487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 18497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic atomic_t user_count = ATOMIC_INIT(0); 18517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic atomic_t user_setup = ATOMIC_INIT(0); 18527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanint ipath_user_add(struct ipath_devdata *dd) 18547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 18557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan char name[10]; 18567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 18577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_inc_return(&user_count) == 1) { 18597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = user_init(); 18607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 18617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Unable to set up user support: " 18627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "error %d\n", -ret); 18637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 18647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 18657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = init_cdev(0, "ipath", &ipath_file_ops, &wildcard_cdev, 18667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &wildcard_class_dev); 18677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 18687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Could not create wildcard " 18697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "minor: error %d\n", -ret); 1870a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan goto bail_sma; 18717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 18727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_set(&user_setup, 1); 18747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 18757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan snprintf(name, sizeof(name), "ipath%d", dd->ipath_unit); 18777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = init_cdev(dd->ipath_unit + 1, name, &ipath_file_ops, 1879a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan &dd->user_cdev, &dd->user_class_dev); 18807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 18817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Could not create user minor %d, %s\n", 18827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_unit + 1, name); 18837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 18857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail_sma: 18877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan user_cleanup(); 18887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 18897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 18907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 18917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1892a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivanvoid ipath_user_remove(struct ipath_devdata *dd) 18937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 1894a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan cleanup_cdev(&dd->user_cdev, &dd->user_class_dev); 18957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_dec_return(&user_count) == 0) { 18977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_read(&user_setup) == 0) 18987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 18997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 19007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cleanup_cdev(&wildcard_cdev, &wildcard_class_dev); 19017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan user_cleanup(); 19027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 19037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_set(&user_setup, 0); 19047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 19057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 19067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return; 19077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 1908