ipath_file_ops.c revision 367fe711c5dc85dbc3265cf01e34d4d6fbd55f06
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 "ipath_layer.h" 4327b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan#include "ipath_common.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; 126f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan kinfo->spi_rcvhdr_tailaddr = (u64)pd->port_rcvhdrqtailaddr_phys; 1277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_rcv_egrbufs = (u64) pd->port_rcvegr_phys; 1287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_pioavailaddr = (u64) dd->ipath_pioavailregs_phys; 1297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_status = (u64) kinfo->spi_pioavailaddr + 1307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) dd->ipath_statusp - 1317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) dd->ipath_pioavailregs_dma; 1327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_piobufbase = (u64) pd->port_piobufs; 1337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->__spi_uregbase = 1347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_uregbase + dd->ipath_palign * pd->port_port; 1357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_pioindex = dd->ipath_pbufsport * (pd->port_port - 1); 1377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_piocnt = dd->ipath_pbufsport; 1387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_pioalign = dd->ipath_palign; 1397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_qpair = IPATH_KD_QP; 1417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_piosize = dd->ipath_ibmaxlen; 1427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_mtu = dd->ipath_ibmaxlen; /* maxlen, not ibmtu */ 1437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_port = pd->port_port; 144eaf6733bc176742fb08def2269441684e963c275Bryan O'Sullivan kinfo->spi_sw_version = IPATH_KERN_SWVERSION; 1457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kinfo->spi_hw_version = dd->ipath_revision; 1467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user(ubase, kinfo, sizeof(*kinfo))) 1487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 1497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 1517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kfree(kinfo); 1527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 1537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 1547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 1567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_tid_update - update a port TID 1577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 1587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @ti: the TID information 1597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 1607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * The new implementation as of Oct 2004 is that the driver assigns 1617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the tid and returns it to the caller. To make it easier to 1627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * catch bugs, and to reduce search time, we keep a cursor for 1637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * each port, walking the shadow tid array to find one that's not 1647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in use. 1657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 1667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * For now, if we can't allocate the full list, we fail, although 1677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in the long run, we'll allocate as many as we can, and the 1687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * caller will deal with that by trying the remaining pages later. 1697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * That means that when we fail, we have to mark the tids as not in 1707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * use again, in our shadow copy. 1717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 1727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * It's up to the caller to free the tids when they are done. 1737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We'll unlock the pages as they free them. 1747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 1757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Also, right now we are locking one page at a time, but since 1767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the intended use of this routine is for a single group of 1777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * virtually contiguous pages, that should change to improve 1787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * performance. 1797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_tid_update(struct ipath_portdata *pd, 1817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_tid_info *ti) 1827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 1837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0, ntids; 1847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 tid, porttid, cnt, i, tidcnt; 1857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u16 *tidlist; 1867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 1877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 physaddr; 1887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long vaddr; 1897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 __iomem *tidbase; 1907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long tidmap[8]; 1917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct page **pagep = NULL; 1927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow) { 1947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 1957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 1967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt = ti->tidcnt; 1997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cnt) { 2007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("After copyin, tidcnt 0, tidlist %llx\n", 2017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) ti->tidlist); 2027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 2037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Should we treat as success? likely a bug 2047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 2057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 2067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 2077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt; 2097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cnt >= tidcnt) { 2107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* make sure it all fits in port_tid_pg_list */ 2117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "Process tried to allocate %u " 2127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "TIDs, only trying max (%u)\n", cnt, tidcnt); 2137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt = tidcnt; 2147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pagep = (struct page **)pd->port_tid_pg_list; 2167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidlist = (u16 *) (&pagep[cnt]); 2177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan memset(tidmap, 0, sizeof(tidmap)); 2197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = pd->port_tidcursor; 2207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* before decrement; chip actual # */ 2217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid = pd->port_port * tidcnt; 2227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ntids = tidcnt; 2237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidbase = (u64 __iomem *) (((char __iomem *) dd->ipath_kregbase) + 2247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidbase + 2257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid * sizeof(*tidbase)); 2267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port%u %u tids, cursor %u, tidbase %p\n", 2287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, cnt, tid, tidbase); 2297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 2307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* virtual address of first page in transfer */ 2317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vaddr = ti->tidvaddr; 2327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!access_ok(VERIFY_WRITE, (void __user *) vaddr, 2337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt * PAGE_SIZE)) { 2347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Fail vaddr %p, %u pages, !access_ok\n", 2357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *)vaddr, cnt); 2367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 2377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 2387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_get_user_pages(vaddr, cnt, pagep); 2407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) { 2417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret == -EBUSY) { 2427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to lock addr %p, %u pages " 2437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(already locked)\n", 2447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void *) vaddr, cnt); 2457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 2467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for now, continue, and see what happens but with 2477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the new implementation, this should never happen, 2487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * unless perhaps the user has mpin'ed the pages 2497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * themselves (something we need to test) 2507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 2517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 2527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 2537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 2547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "Failed to lock addr %p, %u pages: " 2557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "errno %d\n", (void *) vaddr, cnt, -ret); 2567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 2577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < cnt; i++, vaddr += PAGE_SIZE) { 2607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (; ntids--; tid++) { 2617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (tid == tidcnt) 2627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = 0; 2637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow[porttid + tid]) 2647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 2657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ntids < 0) { 2677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 2687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * oops, wrapped all the way through their TIDs, 2697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * and didn't have enough free; see comments at 2707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * start of routine 2717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 2727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Not enough free TIDs for %u pages " 2737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(index %d), failing\n", cnt, i); 2747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan i--; /* last tidlist[i] not filled in */ 2757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 2767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 2777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 2787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidlist[i] = tid; 2797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Updating idx %u to TID %u, " 2807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "vaddr %lx\n", i, tid, vaddr); 2817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* we "know" system pages and TID pages are same size */ 2827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[porttid + tid] = pagep[i]; 2837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 2847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * don't need atomic or it's overhead 2857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 2867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan __set_bit(tid, tidmap); 2877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan physaddr = page_to_phys(pagep[i]); 2887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pagelocks++; 2897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, 2907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "TID %u, vaddr %lx, physaddr %llx pgp %p\n", 2917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid, vaddr, (unsigned long long) physaddr, 2927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pagep[i]); 2937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_f_put_tid(dd, &tidbase[tid], 1, physaddr); 2947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 2957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * don't check this tid in ipath_portshadow, since we 2967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * just filled it in; start with the next one. 2977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 2987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid++; 2997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) { 3027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 limit; 3037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cleanup: 3047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* jump here if copy out of updated info failed... */ 3057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("After failure (ret=%d), undo %d of %d entries\n", 3067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan -ret, i, cnt); 3077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* same code that's in ipath_free_tid() */ 3087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = sizeof(tidmap) * BITS_PER_BYTE; 3097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (limit > tidcnt) 3107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* just in case size changes in future */ 3117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = tidcnt; 3127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = find_first_bit((const unsigned long *)tidmap, limit); 3137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (; tid < limit; tid++) { 3147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!test_bit(tid, tidmap)) 3157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 3167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pageshadow[porttid + tid]) { 3177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Freeing TID %u\n", 3187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid); 3197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_f_put_tid(dd, &tidbase[tid], 1, 3207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_tidinvalid); 3217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[porttid + tid] = NULL; 3227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 3237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_release_user_pages(pagep, cnt); 3267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 3277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 3287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Copy the updated array, with ipath_tid's filled in, back 3297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * to user. Since we did the copy in already, this "should 3307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * never fail" If it does, we have to clean up... 3317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user((void __user *) 3337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) ti->tidlist, 3347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidlist, cnt * sizeof(*tidlist))) { 3357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 3367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto cleanup; 3377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user((void __user *) (unsigned long) ti->tidmap, 3397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidmap, sizeof tidmap)) { 3407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 3417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto cleanup; 3427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (tid == tidcnt) 3447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = 0; 3457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_tidcursor = tid; 3467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 3497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 3507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to map %u TID pages, failing with %d\n", 3517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, -ret); 3527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 3537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 3547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 3567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_tid_free - free a port TID 3577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 3587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @ti: the TID info 3597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 3607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * right now we are unlocking one page at a time, but since 3617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the intended use of this routine is for a single group of 3627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * virtually contiguous pages, that should change to improve 3637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * performance. We check that the TID is in range for this port 3647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * but otherwise don't check validity; if user has an error and 3657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * frees the wrong tid, it's only their own data that can thereby 3667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * be corrupted. We do check that the TID was in use, for sanity 3677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We always use our idea of the saved address, not the address that 3687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * they pass in to us. 3697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 3707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_tid_free(struct ipath_portdata *pd, 3727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_tid_info *ti) 3737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 3747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 3757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 tid, porttid, cnt, limit, tidcnt; 3767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 3777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 __iomem *tidbase; 3787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long tidmap[8]; 3797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow) { 3817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 3827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_from_user(tidmap, (void __user *)(unsigned long)ti->tidmap, 3867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan sizeof tidmap)) { 3877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 3887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 3897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 3907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid = pd->port_port * dd->ipath_rcvtidcnt; 3927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) + 3937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidbase + 3947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan porttid * sizeof(*tidbase)); 3957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 3967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tidcnt = dd->ipath_rcvtidcnt; 3977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = sizeof(tidmap) * BITS_PER_BYTE; 3987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (limit > tidcnt) 3997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* just in case size changes in future */ 4007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit = tidcnt; 4017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tid = find_first_bit(tidmap, limit); 4027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port%u free %u tids; first bit (max=%d) " 4037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "set is %d, porttid %u\n", pd->port_port, ti->tidcnt, 4047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan limit, tid, porttid); 4057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (cnt = 0; tid < limit; tid++) { 4067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 4077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * small optimization; if we detect a run of 3 or so without 4087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * any set, use find_first_bit again. That's mainly to 4097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * accelerate the case where we wrapped, so we have some at 4107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the beginning, and some at the end, and a big gap 4117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in the middle. 4127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!test_bit(tid, tidmap)) 4147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 4157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt++; 4167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pageshadow[porttid + tid]) { 4177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "PID %u freeing TID %u\n", 4187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pid, tid); 4197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_f_put_tid(dd, &tidbase[tid], 1, 4207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_tidinvalid); 4217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_release_user_pages( 4227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_pageshadow[porttid + tid], 1); 4237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[porttid + tid] = NULL; 4247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 4257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else 4267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Unused tid %u, ignoring\n", tid); 4277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cnt != ti->tidcnt) 4297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("passed in tidcnt %d, only %d bits set in map\n", 4307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, cnt); 4317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 4327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 4337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("Failed to unmap %u TID pages, failing with %d\n", 4347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ti->tidcnt, -ret); 4357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 4367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 4377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 4397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_set_part_key - set a partition key 4407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 4417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @key: the key 4427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 4437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We can have up to 4 active at a time (other than the default, which is 4447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * always allowed). This is somewhat tricky, since multiple ports may set 4457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the same key, so we reference count them, and clean up at exit. All 4 4467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * partition keys are packed into a single infinipath register. It's an 4477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * error for a process to set the same pkey multiple times. We provide no 4487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * mechanism to de-allocate a pkey at this time, we may eventually need to 4497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * do that. I've used the atomic operations, and no locking, and only make 4507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * a single pass through what's available. This should be more than 4517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * adequate for some time. I'll think about spinlocks or the like if and as 4527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * it's necessary. 4537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_set_part_key(struct ipath_portdata *pd, u16 key) 4557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 4567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 4577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, any = 0, pidx = -1; 4587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u16 lkey = key & 0x7FFF; 4597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 4607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 46127b678dd04a636f2c351816f4b3042c8815d4e9dBryan O'Sullivan if (lkey == (IPATH_DEFAULT_P_KEY & 0x7FFF)) { 4627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* nothing to do; this key always valid */ 4637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 4647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 4657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u try to set pkey %hx, current keys " 4687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%hx:%x %hx:%x %hx:%x %hx:%x\n", 4697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, dd->ipath_pkeys[0], 4707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[0]), dd->ipath_pkeys[1], 4717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[1]), dd->ipath_pkeys[2], 4727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[2]), dd->ipath_pkeys[3], 4737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[3])); 4747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!lkey) { 4767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "p%u tries to set key 0, not allowed\n", 4777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port); 4787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 4797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 4807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 4817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 4837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Set the full membership bit, because it has to be 4847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * set in the register or the packet, and it seems 4857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * cleaner to set in the register than to force all 4867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * callers to set it. (see bug 4331) 4877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 4887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan key |= 0x8000; 4897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 4907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) { 4917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_pkeys[i] && pidx == -1) 4927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pidx = i; 4937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_pkeys[i] == key) { 4947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u tries to set same pkey " 4957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "(%x) more than once\n", 4967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key); 4977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EEXIST; 4987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 4997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pidx == -1) { 5027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("All pkeys for port %u already in use, " 5037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 5047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 5057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 5067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) { 5087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pkeys[i]) { 5097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan any++; 5107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 5117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_pkeys[i] == key) { 5137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_t *pkrefs = &dd->ipath_pkeyrefs[i]; 5147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_inc_return(pkrefs) > 1) { 5167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[pidx] = key; 5177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u set key %x " 5187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "matches #%d, count now %d\n", 5197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, i, 5207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(pkrefs)); 5217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 5227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 5237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 5247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 5257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * lost race, decrement count, catch below 5267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 5277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_dec(pkrefs); 5287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Lost race, count was " 5297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "0, after dec, it's %d\n", 5307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(pkrefs)); 5317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan any++; 5327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) { 5357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 5367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * It makes no sense to have both the limited and 5377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * full membership PKEY set at the same time since 5387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the unlimited one will disable the limited one. 5397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 5407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EEXIST; 5417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 5427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!any) { 5457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u, all pkeys already in use, " 5467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 5477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 5487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 5497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) { 5517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pkeys[i] && 5527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) { 5537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pkey; 5547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for ipathstats, etc. */ 5567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pkeys[i] = lkey; 5577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[pidx] = dd->ipath_pkeys[i] = key; 5587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pkey = 5597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (u64) dd->ipath_pkeys[0] | 5607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 5617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 5627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 5637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "p%u set key %x in #%d, " 5647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "portidx %d, new pkey reg %llx\n", 5657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, key, i, pidx, 5667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pkey); 5677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg( 5687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd, dd->ipath_kregs->kr_partitionkey, pkey); 5697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 5717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 5727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 5747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u, all pkeys already in use 2nd pass, " 5757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "can't set %x\n", pd->port_port, key); 5767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 5777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 5797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 5807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 5817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 5837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_manage_rcvq - manage a port's receive queue 5847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port 5857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @start_stop: action to carry out 5867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 5877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * start_stop == 0 disables receive on the port, for use in queue 5887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * overflow conditions. start_stop==1 re-enables, to be used to 5897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * re-init the software copy of the head register 5907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 5917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_manage_rcvq(struct ipath_portdata *pd, int start_stop) 5927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 5937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 5947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 tval; 5957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 5967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%sabling rcv for unit %u port %u\n", 5977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan start_stop ? "en" : "dis", dd->ipath_unit, 5987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port); 5997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* atomically clear receive enable port. */ 6007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (start_stop) { 6017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 6027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * On enable, force in-memory copy of the tail register to 6037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 0, so that protocol code doesn't have to worry about 6047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * whether or not the chip has yet updated the in-memory 6057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * copy or not on return from the system call. The chip 6067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * always resets it's tail register back to 0 on a 6077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * transition from disabled to enabled. This could cause a 6087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * problem if software was broken, and did the enable w/o 6097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the disable, but eventually the in-memory copy will be 6107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * updated and correct itself, even in the face of software 6117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * bugs. 6127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *pd->port_rcvhdrtail_kvaddr = 0; 6147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan set_bit(INFINIPATH_R_PORTENABLE_SHIFT + pd->port_port, 6157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_rcvctrl); 6167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else 6177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan clear_bit(INFINIPATH_R_PORTENABLE_SHIFT + pd->port_port, 6187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->ipath_rcvctrl); 6197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 6207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl); 6217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* now be sure chip saw it before we return */ 6227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tval = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); 6237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (start_stop) { 6247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 6257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * And try to be sure that tail reg update has happened too. 6267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This should in theory interlock with the RXE changes to 6277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the tail register. Don't assign it to the tail register 6287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in memory copy, since we could overwrite an update by the 6297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * chip if we did. 6307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 6317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tval = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); 6327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* always; new head should be equal to new tail; see above */ 6347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return 0; 6357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 6367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void ipath_clean_part_key(struct ipath_portdata *pd, 6387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd) 6397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 6407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, j, pchanged = 0; 6417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 oldpkey; 6427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for debugging only */ 6447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan oldpkey = (u64) dd->ipath_pkeys[0] | 6457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 6467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 6477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 6487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) { 6507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_pkeys[i]) 6517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 6527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "look for key[%d] %hx in pkeys\n", i, 6537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i]); 6547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (j = 0; j < ARRAY_SIZE(dd->ipath_pkeys); j++) { 6557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* check for match independent of the global bit */ 6567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((dd->ipath_pkeys[j] & 0x7fff) != 6577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (pd->port_pkeys[i] & 0x7fff)) 6587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 6597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_dec_and_test(&dd->ipath_pkeyrefs[j])) { 6607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u clear key " 6617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%x matches #%d\n", 6627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, 6637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i], j); 6647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pkeys[j] = 6657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pkeys[j] = 0; 6667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pchanged++; 6677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else ipath_cdbg( 6697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan VERBOSE, "p%u key %x matches #%d, " 6707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "but ref still %d\n", pd->port_port, 6717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i], j, 6727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_read(&dd->ipath_pkeyrefs[j])); 6737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 6747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pkeys[i] = 0; 6767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pchanged) { 6787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pkey = (u64) dd->ipath_pkeys[0] | 6797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[1] << 16) | 6807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[2] << 32) | 6817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((u64) dd->ipath_pkeys[3] << 48); 6827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "p%u old pkey reg %llx, " 6837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "new pkey reg %llx\n", pd->port_port, 6847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) oldpkey, 6857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pkey); 6867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey, 6877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pkey); 6887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 6897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 6907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 6917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 6927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_create_user_egr - allocate eager TID buffers 6937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: the port to allocate TID buffers for 6947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 6957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This routine is now quite different for user and kernel, because 6967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the kernel uses skb's, for the accelerated network performance 6977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This is the user port version 6987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 6997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Allocate the eager TID buffers and program them into infinipath 7007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * They are no longer completely contiguous, we do multiple allocation 7017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * calls. 7027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 7037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_create_user_egr(struct ipath_portdata *pd) 7047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 7057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 7067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned e, egrcnt, alloced, egrperchunk, chunk, egrsize, egroff; 7077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t size; 7087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 7090ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan gfp_t gfp_flags; 7100ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan 7110ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan /* 7120ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * GFP_USER, but without GFP_FS, so buffer cache can be 7130ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * coalesced (we hope); otherwise, even at order 4, 7140ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * heavy filesystem activity makes these fail, and we can 7150ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * use compound pages. 7160ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan */ 7170ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan gfp_flags = __GFP_WAIT | __GFP_IO | __GFP_COMP; 7187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egrcnt = dd->ipath_rcvegrcnt; 7207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* TID number offset for this port */ 7217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egroff = pd->port_port * egrcnt; 7227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egrsize = dd->ipath_rcvegrbufsize; 7237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Allocating %d egr buffers, at egrtid " 7247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "offset %x, egrsize %u\n", egrcnt, egroff, egrsize); 7257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 7277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * to avoid wasting a lot of memory, we allocate 32KB chunks of 7287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * physically contiguous memory, advance through it until used up 7297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * and then allocate more. Of course, we need memory to store those 7307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * extra pointers, now. Started out with 256KB, but under heavy 7317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * memory pressure (creating large files and then copying them over 7327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * NFS while doing lots of MPI jobs), we hit some allocation 7337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * failures, even though we can sleep... (2.6.10) Still get 7340ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * failures at 64K. 32K is the lowest we can go without wasting 7350ed9a4a0b6df0548f9ccadb62add2c0155d5262cBryan O'Sullivan * additional memory. 7367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 7377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size = 0x8000; 7387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan alloced = ALIGN(egrsize * egrcnt, size); 7397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan egrperchunk = size / egrsize; 7407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan chunk = (egrcnt + egrperchunk - 1) / egrperchunk; 7417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_chunks = chunk; 7427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbufs_perchunk = egrperchunk; 7437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_size = size; 7447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf = vmalloc(chunk * sizeof(pd->port_rcvegrbuf[0])); 7457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf) { 7467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 7477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 7487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys = 7507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vmalloc(chunk * sizeof(pd->port_rcvegrbuf_phys[0])); 7517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf_phys) { 7527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 7537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail_rcvegrbuf; 7547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) { 7567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf[e] = dma_alloc_coherent( 7587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &dd->pcidev->dev, size, &pd->port_rcvegrbuf_phys[e], 7597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan gfp_flags); 7607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!pd->port_rcvegrbuf[e]) { 7627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 7637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail_rcvegrbuf_phys; 7647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegr_phys = pd->port_rcvegrbuf_phys[0]; 7687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = chunk = 0; chunk < pd->port_rcvegrbuf_chunks; chunk++) { 7707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dma_addr_t pa = pd->port_rcvegrbuf_phys[chunk]; 7717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned i; 7727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; e < egrcnt && i < egrperchunk; e++, i++) { 7747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_f_put_tid(dd, e + egroff + 7757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (u64 __iomem *) 7767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ((char __iomem *) 7777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_kregbase + 7787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvegrbase), 0, pa); 7797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pa += egrsize; 7807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cond_resched(); /* don't hog the cpu */ 7827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 7837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 7857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 7867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 7877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail_rcvegrbuf_phys: 7887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (e = 0; e < pd->port_rcvegrbuf_chunks && 789f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan pd->port_rcvegrbuf[e]; e++) { 7907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dma_free_coherent(&dd->pcidev->dev, size, 7917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf[e], 7927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys[e]); 7937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 794f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 7957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vfree(pd->port_rcvegrbuf_phys); 7967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf_phys = NULL; 7977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail_rcvegrbuf: 7987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vfree(pd->port_rcvegrbuf); 7997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvegrbuf = NULL; 8007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 8017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 8027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 8037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_do_user_init(struct ipath_portdata *pd, 8057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_user_info *uinfo) 8067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 8077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 8087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 8097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 head32; 8107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for now, if major version is different, bail */ 8127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((uinfo->spu_userversion >> 16) != IPATH_USER_SWMAJOR) { 8137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 8147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "User major version %d not same as driver " 8157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "major %d\n", uinfo->spu_userversion >> 16, 8167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan IPATH_USER_SWMAJOR); 8177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENODEV; 8187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 8197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((uinfo->spu_userversion & 0xffff) != IPATH_USER_SWMINOR) 8227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("User minor version %d not same as driver " 8237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "minor %d\n", uinfo->spu_userversion & 0xffff, 8247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan IPATH_USER_SWMINOR); 8257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (uinfo->spu_rcvhdrsize) { 8277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_setrcvhdrsize(dd, uinfo->spu_rcvhdrsize); 8287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 8297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 8307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 8317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for now we do nothing with rcvhdrcnt: uinfo->spu_rcvhdrcnt */ 8337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* for right now, kernel piobufs are at end, so port 1 is at 0 */ 8357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_piobufs = dd->ipath_piobufbase + 8367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pbufsport * (pd->port_port - 8377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1) * dd->ipath_palign; 8387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Set base of piobufs for port %u to 0x%x\n", 8397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, pd->port_piobufs); 8407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 8427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Now allocate the rcvhdr Q and eager TIDs; skip the TID 8437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * array for time being. If pd->port_port > chip-supported, 8447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * we need to do extra stuff here to handle by handling overflow 8457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * through port 0, someday 8467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 8477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_create_rcvhdrq(dd, pd); 8487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!ret) 8497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_create_user_egr(pd); 8507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret) 8517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 8527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 8537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 854f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * set the eager head register for this port to the current values 8557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * of the tail pointers, since we don't know if they were 8567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * updated on last use of the port. 8577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 8587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan head32 = ipath_read_ureg32(dd, ur_rcvegrindextail, pd->port_port); 8597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_ureg(dd, ur_rcvegrindexhead, head32, pd->port_port); 8607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_lastegrheads[pd->port_port] = -1; 8617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_lastrcvhdrqtails[pd->port_port] = -1; 862f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ipath_cdbg(VERBOSE, "Wrote port%d egrhead %x from tail regs\n", 863f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan pd->port_port, head32); 8647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_tidcursor = 0; /* start at beginning after open */ 8657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 8667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * now enable the port; the tail registers will be written to memory 8677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * by the chip as soon as it sees the write to 8687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * dd->ipath_kregs->kr_rcvctrl. The update only happens on 8697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * transition from 0 to 1, so clear it first, then set it as part of 8707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * enabling the port. This will (very briefly) affect any other 8717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * open ports, but it shouldn't be long enough to be an issue. 872f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * We explictly set the in-memory copy to 0 beforehand, so we don't 873f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * have to wait to be sure the DMA update has happened. 8747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 875f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan *pd->port_rcvhdrtail_kvaddr = 0ULL; 876f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan set_bit(INFINIPATH_R_PORTENABLE_SHIFT + pd->port_port, 877f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan &dd->ipath_rcvctrl); 8787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 8797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl & ~INFINIPATH_R_TAILUPD); 8807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 8817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl); 8827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 8837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 8847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 8857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 886f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 887f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan/* common code for the mappings on dma_alloc_coherent mem */ 888f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivanstatic int ipath_mmap_mem(struct vm_area_struct *vma, 889f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan struct ipath_portdata *pd, unsigned len, 890f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan int write_ok, dma_addr_t addr, char *what) 891f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan{ 892f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 893f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan unsigned pfn = (unsigned long)addr >> PAGE_SHIFT; 894f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan int ret; 895f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 896f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > len) { 897f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dev_info(&dd->pcidev->dev, 898f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "FAIL on %s: len %lx > %x\n", what, 899f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_end - vma->vm_start, len); 900f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = -EFAULT; 901f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan goto bail; 902f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 903f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 904f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (!write_ok) { 905f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (vma->vm_flags & VM_WRITE) { 906f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dev_info(&dd->pcidev->dev, 907f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "%s must be mapped readonly\n", what); 908f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = -EPERM; 909f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan goto bail; 910f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 911f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 912f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* don't allow them to later change with mprotect */ 913f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYWRITE; 914f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 915f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 916f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = remap_pfn_range(vma, vma->vm_start, pfn, 917f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan len, vma->vm_page_prot); 918f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (ret) 919f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dev_info(&dd->pcidev->dev, 920f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "%s port%u mmap of %lx, %x bytes r%c failed: %d\n", 921f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan what, pd->port_port, (unsigned long)addr, len, 922f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan write_ok?'w':'o', ret); 923f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan else 924f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ipath_cdbg(VERBOSE, "%s port%u mmaped %lx, %x bytes r%c\n", 925f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan what, pd->port_port, (unsigned long)addr, len, 926f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan write_ok?'w':'o'); 927f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivanbail: 928f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan return ret; 929f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan} 930f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 9317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_ureg(struct vm_area_struct *vma, struct ipath_devdata *dd, 9327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 ureg) 9337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 9347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long phys; 9357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 9367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 937f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* 938f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * This is real hardware, so use io_remap. This is the mechanism 939f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * for the user process to update the head registers for their port 940f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * in the chip. 941f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan */ 9427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > PAGE_SIZE) { 9437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL mmap userreg: reqlen " 9447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%lx > PAGE\n", vma->vm_end - vma->vm_start); 9457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 9467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 9477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys = dd->ipath_physaddr + ureg; 9487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 9497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; 9517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = io_remap_pfn_range(vma, vma->vm_start, 9527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys >> PAGE_SHIFT, 9537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 9547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot); 9557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 9577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 9587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_piobufs(struct vm_area_struct *vma, 9607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd, 9617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd) 9627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 9637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long phys; 9647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 9657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 967f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * When we map the PIO buffers in the chip, we want to map them as 968f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * writeonly, no read possible. This prevents access to previous 969f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * process data, and catches users who might try to read the i/o 970f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * space due to a bug. 9717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 9727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > 9737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (dd->ipath_pbufsport * dd->ipath_palign)) { 9747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL mmap piobufs: " 9757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "reqlen %lx > PAGE\n", 9767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start); 9777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 9787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 9797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 9807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 9817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys = dd->ipath_physaddr + pd->port_piobufs; 982f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 9837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 984f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * Don't mark this as non-cached, or we don't get the 9857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * write combining behavior we want on the PIO buffers! 9867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 9877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 988eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan#if defined(__powerpc__) 989eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan /* There isn't a generic way to specify writethrough mappings */ 990eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; 991eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) |= _PAGE_WRITETHRU; 992eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan pgprot_val(vma->vm_page_prot) &= ~_PAGE_GUARDED; 993eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan#endif 994eb9dc6f48dc7537ce53163109625bd992150e0cfBryan O'Sullivan 995367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan /* 996367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan * don't allow them to later change to readable with mprotect (for when 997367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan * not initially mapped readable, as is normally the case) 998367fe711c5dc85dbc3265cf01e34d4d6fbd55f06Bryan O'Sullivan */ 999f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYREAD; 10007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; 10017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = io_remap_pfn_range(vma, vma->vm_start, phys >> PAGE_SHIFT, 10037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 10047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_page_prot); 10057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 10067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 10077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 10087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int mmap_rcvegrbufs(struct vm_area_struct *vma, 10107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd) 10117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 10137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned long start, size; 10147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t total_size, i; 10157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dma_addr_t *phys; 10167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 10177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size = pd->port_rcvegrbuf_size; 10197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan total_size = pd->port_rcvegrbuf_chunks * size; 10207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((vma->vm_end - vma->vm_start) > total_size) { 10217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "FAIL on egr bufs: " 10227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "reqlen %lx > actual %lx\n", 10237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_end - vma->vm_start, 10247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) total_size); 10257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 10267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (vma->vm_flags & VM_WRITE) { 10307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, "Can't map eager buffers as " 10317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "writable (flags=%lx)\n", vma->vm_flags); 10327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EPERM; 10337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 1035f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* don't allow them to later change to writeable with mprotect */ 1036f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_flags &= ~VM_MAYWRITE; 10377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan start = vma->vm_start; 10397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan phys = pd->port_rcvegrbuf_phys; 10407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < pd->port_rcvegrbuf_chunks; i++, start += size) { 10427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = remap_pfn_range(vma, start, phys[i] >> PAGE_SHIFT, 10437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size, vma->vm_page_prot); 10447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 10457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 10467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 10477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 10487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 10507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 10517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 10527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 10547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * ipath_mmap - mmap various structures into user space 10557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @fp: the file pointer 10567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @vma: the VM area 10577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 10587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We use this to have a shared buffer between the kernel and the user code 10597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for the rcvhdr queue, egr buffers, and the per-port user regs and pio 10607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * buffers in the chip. We have the open and close entries so we can bump 10617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * the ref count and keep the driver from being unloaded while still mapped. 10627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 10637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_mmap(struct file *fp, struct vm_area_struct *vma) 10647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 10657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 10667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 10677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u64 pgaddr, ureg; 10687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 10697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 10717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 1072f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 10737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 10747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This is the ipath_do_user_init() code, mapping the shared buffers 10757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * into the user process. The address referred to by vm_pgoff is the 10767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * virtual, not physical, address; we only do one mmap for each 10777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * space mapped. 10787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 10797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pgaddr = vma->vm_pgoff << PAGE_SHIFT; 10807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 10817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 1082f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * Must fit in 40 bits for our hardware; some checked elsewhere, 1083f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * but we'll be paranoid. Check for 0 is mostly in case one of the 1084f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * allocations failed, but user called mmap anyway. We want to catch 1085f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * that before it can match. 10867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 1087f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (!pgaddr || pgaddr >= (1ULL<<40)) { 1088f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ipath_dev_err(dd, "Bad phys addr %llx, start %lx, end %lx\n", 1089f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan (unsigned long long)pgaddr, vma->vm_start, vma->vm_end); 1090f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan return -EINVAL; 1091f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 10927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1093f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* just the offset of the port user registers, not physical addr */ 10947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ureg = dd->ipath_uregbase + dd->ipath_palign * pd->port_port; 10957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1096f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ipath_cdbg(MM, "ushare: pgaddr %llx vm_start=%lx, vmlen %lx\n", 10977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) pgaddr, vma->vm_start, 1098f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_end - vma->vm_start); 10997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1100f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan if (vma->vm_start & (PAGE_SIZE-1)) { 1101f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ipath_dev_err(dd, 1102f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "vm_start not aligned: %lx, end=%lx phys %lx\n", 1103f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan vma->vm_start, vma->vm_end, (unsigned long)pgaddr); 1104f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = -EINVAL; 1105f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 1106f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan else if (pgaddr == ureg) 11077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_ureg(vma, dd, ureg); 11087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else if (pgaddr == pd->port_piobufs) 11097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_piobufs(vma, dd, pd); 11107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else if (pgaddr == (u64) pd->port_rcvegr_phys) 11117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = mmap_rcvegrbufs(vma, pd); 1112f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan else if (pgaddr == (u64) pd->port_rcvhdrq_phys) { 1113f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* 1114f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * The rcvhdrq itself; readonly except on HT-400 (so have 1115f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * to allow writable mapping), multiple pages, contiguous 1116f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * from an i/o perspective. 1117f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan */ 1118f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan unsigned total_size = 1119f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize 1120f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan * sizeof(u32), PAGE_SIZE); 1121f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, total_size, 1, 1122f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan pd->port_rcvhdrq_phys, 1123f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "rcvhdrq"); 1124f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan } 1125f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan else if (pgaddr == (u64)pd->port_rcvhdrqtailaddr_phys) 1126f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* in-memory copy of rcvhdrq tail register */ 1127f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0, 1128f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan pd->port_rcvhdrqtailaddr_phys, 1129f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "rcvhdrq tail"); 11307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else if (pgaddr == dd->ipath_pioavailregs_phys) 1131f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan /* in-memory copy of pioavail registers */ 1132f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0, 1133f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dd->ipath_pioavailregs_phys, 1134f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan "pioavail registers"); 11357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else 11367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 11377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan vma->vm_private_data = NULL; 11397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 11417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dev_info(&dd->pcidev->dev, 11427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "Failure %d on addr %lx, off %lx\n", 11437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan -ret, vma->vm_start, vma->vm_pgoff); 11447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 11467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 11477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic unsigned int ipath_poll(struct file *fp, 11497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct poll_table_struct *pt) 11507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 11517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 11527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan u32 head, tail; 11537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int bit; 11547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 11557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 11577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 11587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan bit = pd->port_port + INFINIPATH_R_INTRAVAIL_SHIFT; 11607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan set_bit(bit, &dd->ipath_rcvctrl); 11617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 11637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Before blocking, make sure that head is still == tail, 11647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * reading from the chip, so we can be sure the interrupt 11657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * enable has made it to the chip. If not equal, disable 11667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * interrupt again and return immediately. This avoids races, 11677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * and the overhead of the chip read doesn't matter much at 11687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * this point, since we are waiting for something anyway. 11697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 11707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 11727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl); 11737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan head = ipath_read_ureg32(dd, ur_rcvhdrhead, pd->port_port); 11757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan tail = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); 11767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (tail == head) { 11787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan set_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag); 11799dcc0e58e2913f7e6ffba64c27fe5c2f2c7b845cBryan O'Sullivan if(dd->ipath_rhdrhead_intr_off) /* arm rcv interrupt */ 11809dcc0e58e2913f7e6ffba64c27fe5c2f2c7b845cBryan O'Sullivan (void)ipath_write_ureg(dd, ur_rcvhdrhead, 11819dcc0e58e2913f7e6ffba64c27fe5c2f2c7b845cBryan O'Sullivan dd->ipath_rhdrhead_intr_off 11829dcc0e58e2913f7e6ffba64c27fe5c2f2c7b845cBryan O'Sullivan | head, pd->port_port); 11837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan poll_wait(fp, &pd->port_wait, pt); 11847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (test_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag)) { 11867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* timed out, no packets received */ 11877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan clear_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag); 11887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvwait_to++; 11897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 11907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 11917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else { 11927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* it's already happened; don't do wait_event overhead */ 11937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvnowait++; 11947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 11957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 11967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan clear_bit(bit, &dd->ipath_rcvctrl); 11977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 11987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvctrl); 11997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return 0; 12017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 12027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int try_alloc_port(struct ipath_devdata *dd, int port, 12047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct file *fp) 12057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 12067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 12077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pd[port]) { 12097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan void *p, *ptmp; 12107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan p = kzalloc(sizeof(struct ipath_portdata), GFP_KERNEL); 12127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 12147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Allocate memory for use in ipath_tid_update() just once 12157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * at open, not per call. Reduces cost of expected send 12167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * setup. 12177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 12187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ptmp = kmalloc(dd->ipath_rcvtidcnt * sizeof(u16) + 12197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_rcvtidcnt * sizeof(struct page **), 12207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan GFP_KERNEL); 12217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!p || !ptmp) { 12227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Unable to allocate portdata " 12237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "memory, failing open\n"); 12247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 12257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kfree(p); 12267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kfree(ptmp); 12277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 12287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 12297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port] = p; 12307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_port = port; 12317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_dd = dd; 12327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_tid_pg_list = ptmp; 12337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan init_waitqueue_head(&dd->ipath_pd[port]->port_wait); 12347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 12357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pd[port]->port_cnt) { 12367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_cnt = 1; 12377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan fp->private_data = (void *) dd->ipath_pd[port]; 12387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] opened unit:port %u:%u\n", 12397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, dd->ipath_unit, 12407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan port); 12417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pd[port]->port_pid = current->pid; 12427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan strncpy(dd->ipath_pd[port]->port_comm, current->comm, 12437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan sizeof(dd->ipath_pd[port]->port_comm)); 12447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_ports++; 12457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 12467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 12477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 12487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 12497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 12517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 12527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 12537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic inline int usable(struct ipath_devdata *dd) 12557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 12567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return dd && 12577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (dd->ipath_flags & IPATH_PRESENT) && 12587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_kregbase && 12597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_lid && 12607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan !(dd->ipath_flags & (IPATH_LINKDOWN | IPATH_DISABLED 12617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan | IPATH_LINKUNK)); 12627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 12637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int find_free_port(int unit, struct file *fp) 12657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 12667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(unit); 12677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret, i; 12687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd) { 12707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENODEV; 12717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 12727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 12737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!usable(dd)) { 12757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENETDOWN; 12767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 12777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 12787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < dd->ipath_cfgports; i++) { 12807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = try_alloc_port(dd, i, fp); 12817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret != -EBUSY) 12827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 12837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 12847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 12857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 12877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 12887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 12897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int find_best_unit(struct file *fp) 12917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 12927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0, i, prefunit = -1, devmax; 12937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int maxofallports, npresent, nup; 12947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ndev; 12957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void) ipath_count_units(&npresent, &nup, &maxofallports); 12977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 12987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 12997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * This code is present to allow a knowledgeable person to 13007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * specify the layout of processes to processors before opening 13017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * this driver, and then we'll assign the process to the "closest" 13027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * HT-400 to that processor (we assume reasonable connectivity, 13037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * for now). This code assumes that if affinity has been set 13047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * before this point, that at most one cpu is set; for now this 13057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * is reasonable. I check for both cpus_empty() and cpus_full(), 13067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in case some kernel variant sets none of the bits when no 13077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * affinity is set. 2.6.11 and 12 kernels have all present 13087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * cpus set. Some day we'll have to fix it up further to handle 13097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * a cpu subset. This algorithm fails for two HT-400's connected 13107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * in tunnel fashion. Eventually this needs real topology 13117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * information. There may be some issues with dual core numbering 13127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * as well. This needs more work prior to release. 13137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 13147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cpus_empty(current->cpus_allowed) && 13157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan !cpus_full(current->cpus_allowed)) { 13167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ncpus = num_online_cpus(), curcpu = -1; 13177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 0; i < ncpus; i++) 13187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cpu_isset(i, current->cpus_allowed)) { 13197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] affinity set for " 13207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "cpu %d\n", current->comm, 13217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->pid, i); 13227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan curcpu = i; 13237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (curcpu != -1) { 13257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (npresent) { 13267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit = curcpu / (ncpus / npresent); 13277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("%s[%u] %d chips, %d cpus, " 13287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%d cpus/chip, select unit %d\n", 13297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, 13307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan npresent, ncpus, ncpus / npresent, 13317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit); 13327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 13377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * user ports start at 1, kernel port is 0 13387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * For now, we do round-robin access across all chips 13397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 13407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (prefunit != -1) 13427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan devmax = prefunit + 1; 13437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else 13447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan devmax = ipath_count_units(NULL, NULL, NULL); 13457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanrecheck: 13467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = 1; i < maxofallports; i++) { 13477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (ndev = prefunit != -1 ? prefunit : 0; ndev < devmax; 13487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ndev++) { 13497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = ipath_lookup(ndev); 13507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!usable(dd)) 13527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; /* can't use this unit */ 13537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (i >= dd->ipath_cfgports) 13547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* 13557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * Maxed out on users of this unit. Try 13567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * next. 13577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 13587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 13597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = try_alloc_port(dd, i, fp); 13607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!ret) 13617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 13627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (npresent) { 13667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (nup == 0) { 13677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENETDOWN; 13687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No ports available (none initialized " 13697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "and ready)\n"); 13707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 13717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (prefunit > 0) { 13727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* if started above 0, retry from 0 */ 13737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, 13747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%s[%u] no ports on prefunit " 13757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%d, clear and re-check\n", 13767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan current->comm, current->pid, 13777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit); 13787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan devmax = ipath_count_units(NULL, NULL, 13797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan NULL); 13807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan prefunit = -1; 13817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto recheck; 13827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EBUSY; 13847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No ports available\n"); 13857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 13877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENXIO; 13887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("No boards found\n"); 13897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 13907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 13927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 13937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 13947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_open(struct inode *in, struct file *fp) 13967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 1397a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan int ret, user_minor; 13987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 13997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_lock(&ipath_mutex); 14007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1401a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan user_minor = iminor(in) - IPATH_USER_MINOR_BASE; 14027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "open on dev %lx (minor %d)\n", 1403a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan (long)in->i_rdev, user_minor); 14047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1405a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan if (user_minor) 1406a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan ret = find_free_port(user_minor - 1, fp); 14077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan else 14087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = find_best_unit(fp); 14097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_unlock(&ipath_mutex); 14117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 14127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 14137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan/** 14157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * unlock_exptid - unlock any expected TID entries port still had in use 14167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * @pd: port 14177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * 14187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * We don't actually update the chip here, because we do a bulk update 14197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan * below, using ipath_f_clear_tids. 14207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan */ 14217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void unlock_expected_tids(struct ipath_portdata *pd) 14227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 14237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd = pd->port_dd; 14247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int port_tidbase = pd->port_port * dd->ipath_rcvtidcnt; 14257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int i, cnt = 0, maxtid = port_tidbase + dd->ipath_rcvtidcnt; 14267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port %u unlocking any locked expTID pages\n", 14287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port); 14297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan for (i = port_tidbase; i < maxtid; i++) { 14307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!dd->ipath_pageshadow[i]) 14317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan continue; 14327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_release_user_pages_on_close(&dd->ipath_pageshadow[i], 14347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1); 14357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_pageshadow[i] = NULL; 14367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cnt++; 14377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks++; 14387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 14397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (cnt) 14407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "Port %u locked %u expTID entries\n", 14417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, cnt); 14427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ipath_stats.sps_pagelocks || ipath_stats.sps_pageunlocks) 14447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "%llu pages locked, %llu unlocked\n", 14457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) ipath_stats.sps_pagelocks, 14467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long long) 14477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_stats.sps_pageunlocks); 14487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 14497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_close(struct inode *in, struct file *fp) 14517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 14527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret = 0; 14537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 14547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_devdata *dd; 14557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unsigned port; 14567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "close on dev %lx, private data %p\n", 14587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (long)in->i_rdev, fp->private_data); 14597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_lock(&ipath_mutex); 14617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 14637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan port = pd->port_port; 14647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan fp->private_data = NULL; 14657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd = pd->port_dd; 14667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_hdrqfull) { 14687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] had %u rcvhdrqfull errors " 14697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "during run\n", pd->port_comm, pd->port_pid, 14707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_hdrqfull); 14717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_hdrqfull = 0; 14727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 14737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_rcvwait_to || pd->port_piowait_to 14757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan || pd->port_rcvnowait || pd->port_pionowait) { 14767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_cdbg(VERBOSE, "port%u, %u rcv, %u pio wait timeo; " 14777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "%u rcv %u, pio already\n", 14787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, pd->port_rcvwait_to, 14797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_piowait_to, pd->port_rcvnowait, 14807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pionowait); 14817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvwait_to = pd->port_piowait_to = 14827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_rcvnowait = pd->port_pionowait = 0; 14837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 14847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (pd->port_flag) { 14857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dbg("port %u port_flag still set to 0x%lx\n", 14867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_port, pd->port_flag); 14877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_flag = 0; 14887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 14897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 14907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (dd->ipath_kregbase) { 149135783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan int i; 149235783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan /* atomically clear receive enable port. */ 149335783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan clear_bit(INFINIPATH_R_PORTENABLE_SHIFT + port, 149435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan &dd->ipath_rcvctrl); 149535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg( dd, dd->ipath_kregs->kr_rcvctrl, 149635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_rcvctrl); 149735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan /* and read back from chip to be sure that nothing 149835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * else is in flight when we do the rest */ 149935783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan (void)ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); 15007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan /* clean up the pkeys for this port user */ 15027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_clean_part_key(pd, dd); 15037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 150535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan /* 150635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * be paranoid, and never write 0's to these, just use an 150735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * unused part of the port 0 tail page. Of course, 150835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * rcvhdraddr points to a large chunk of memory, so this 150935783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * could still trash things, but at least it won't trash 151035783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * page 0, and by disabling the port, it should stop "soon", 151135783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * even if a packet or two is in already in flight after we 151235783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan * disabled the port. 151335783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan */ 151435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg_port(dd, 151535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_kregs->kr_rcvhdrtailaddr, port, 151635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_dummy_hdrq_phys); 151735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdraddr, 151835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan pd->port_port, dd->ipath_dummy_hdrq_phys); 151935783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan 152035783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan i = dd->ipath_pbufsport * (port - 1); 152135783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_disarm_piobufs(dd, i, dd->ipath_pbufsport); 152235783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan 152335783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan if (dd->ipath_pageshadow) 152435783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan unlock_expected_tids(pd); 152535783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_stats.sps_ports--; 152635783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan ipath_cdbg(PROC, "%s[%u] closed port %u:%u\n", 152735783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan pd->port_comm, pd->port_pid, 152835783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_unit, port); 152935783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan 153035783ec07c3f7f6902abe4433e7be1b664d0bbafBryan O'Sullivan dd->ipath_f_clear_tids(dd, pd->port_port); 15317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_cnt = 0; 15347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd->port_pid = 0; 15357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1536f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan dd->ipath_pd[pd->port_port] = NULL; /* before releasing mutex */ 15377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan mutex_unlock(&ipath_mutex); 1538f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan ipath_free_pddata(dd, pd); /* after releasing the mutex */ 15397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 15417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 15427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int ipath_port_info(struct ipath_portdata *pd, 15447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_port_info __user *uinfo) 15457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 15467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_port_info info; 15477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int nup; 15487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 15497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (void) ipath_count_units(NULL, &nup, NULL); 15517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.num_active = nup; 15527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.unit = pd->port_dd->ipath_unit; 15537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan info.port = pd->port_port; 15547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_to_user(uinfo, &info, sizeof(info))) { 15567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 15577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 15587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = 0; 15607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 15627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 15637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 15647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic ssize_t ipath_write(struct file *fp, const char __user *data, 15667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t count, loff_t *off) 15677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 15687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const struct ipath_cmd __user *ucmd; 15697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_portdata *pd; 15707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const void __user *src; 15717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan size_t consumed, copy; 15727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct ipath_cmd cmd; 15737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ssize_t ret = 0; 15747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan void *dest; 15757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (count < sizeof(cmd.type)) { 15777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 15787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 15797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ucmd = (const struct ipath_cmd __user *) data; 15827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_from_user(&cmd.type, &ucmd->type, sizeof(cmd.type))) { 15847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 15857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 15867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 15877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan consumed = sizeof(cmd.type); 15897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 15907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan switch (cmd.type) { 15917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_USER_INIT: 15927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.user_info); 15937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.user_info; 15947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.user_info; 15957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 15967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_RECV_CTRL: 15977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.recv_ctrl); 15987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.recv_ctrl; 15997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.recv_ctrl; 16007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 16017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_PORT_INFO: 16027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.port_info); 16037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.port_info; 16047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.port_info; 16057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 16067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_UPDATE: 16077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_FREE: 16087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.tid_info); 16097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.tid_info; 16107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.tid_info; 16117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 16127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_SET_PART_KEY: 16137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan copy = sizeof(cmd.cmd.part_key); 16147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dest = &cmd.cmd.part_key; 16157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan src = &ucmd->cmd.part_key; 16167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 16177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan default: 16187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 16197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if ((count - consumed) < copy) { 16237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EINVAL; 16247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (copy_from_user(dest, src, copy)) { 16287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -EFAULT; 16297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan consumed += copy; 16337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd = port_fp(fp); 16347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan switch (cmd.type) { 16367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_USER_INIT: 16377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_do_user_init(pd, &cmd.cmd.user_info); 16387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 16397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 16407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_get_base_info( 16417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan pd, (void __user *) (unsigned long) 16427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cmd.cmd.user_info.spu_base_info, 16437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cmd.cmd.user_info.spu_base_info_size); 16447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 16457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_RECV_CTRL: 16467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_manage_rcvq(pd, cmd.cmd.recv_ctrl); 16477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 16487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_PORT_INFO: 16497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_port_info(pd, 16507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (struct ipath_port_info __user *) 16517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan (unsigned long) cmd.cmd.port_info); 16527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 16537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_UPDATE: 16547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_tid_update(pd, &cmd.cmd.tid_info); 16557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 16567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_TID_FREE: 16577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_tid_free(pd, &cmd.cmd.tid_info); 16587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 16597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan case IPATH_CMD_SET_PART_KEY: 16607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = ipath_set_part_key(pd, cmd.cmd.part_key); 16617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan break; 16627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret >= 0) 16657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = consumed; 16667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 16687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 16697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 16707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct class *ipath_class; 16727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int init_cdev(int minor, char *name, struct file_operations *fops, 16747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct cdev **cdevp, struct class_device **class_devp) 16757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 16767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan const dev_t dev = MKDEV(IPATH_MAJOR, minor); 16777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct cdev *cdev = NULL; 16787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device *class_dev = NULL; 16797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 16807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev = cdev_alloc(); 16827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (!cdev) { 16837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME 16847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ": Could not allocate cdev for minor %d, %s\n", 16857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name); 16867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = -ENOMEM; 16877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 16887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 16897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev->owner = THIS_MODULE; 16917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev->ops = fops; 16927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan kobject_set_name(&cdev->kobj, name); 16937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 16947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = cdev_add(cdev, dev, 1); 16957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 16967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME 16977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ": Could not add cdev for minor %d, %s (err %d)\n", 16987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name, -ret); 16997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto err_cdev; 17007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan class_dev = class_device_create(ipath_class, NULL, dev, NULL, name); 17037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (IS_ERR(class_dev)) { 17057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = PTR_ERR(class_dev); 17067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not create " 17077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "class_dev for minor %d, %s (err %d)\n", 17087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan minor, name, -ret); 17097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto err_cdev; 17107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 17137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanerr_cdev: 17157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev_del(cdev); 17167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev = NULL; 17177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 17197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret >= 0) { 17207f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = cdev; 17217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *class_devp = class_dev; 17227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } else { 17237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = NULL; 17247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *class_devp = NULL; 17257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 17287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 17297f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanint ipath_cdev_init(int minor, char *name, struct file_operations *fops, 17317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct cdev **cdevp, struct class_device **class_devp) 17327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 17337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return init_cdev(minor, name, fops, cdevp, class_devp); 17347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 17357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void cleanup_cdev(struct cdev **cdevp, 17377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device **class_devp) 17387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 17397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device *class_dev = *class_devp; 17407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (class_dev) { 17427f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan class_device_unregister(class_dev); 17437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *class_devp = NULL; 17447f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (*cdevp) { 17477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cdev_del(*cdevp); 17487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan *cdevp = NULL; 17497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 17517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanvoid ipath_cdev_cleanup(struct cdev **cdevp, 17537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan struct class_device **class_devp) 17547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 17557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cleanup_cdev(cdevp, class_devp); 17567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 17577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17587f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct cdev *wildcard_cdev; 17597f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic struct class_device *wildcard_class_dev; 17607f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17617f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic const dev_t dev = MKDEV(IPATH_MAJOR, 0); 17627f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17637f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic int user_init(void) 17647f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 17657f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 17667f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17677f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = register_chrdev_region(dev, IPATH_NMINORS, IPATH_DRV_NAME); 17687f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 17697f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not register " 17707f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "chrdev region (err %d)\n", -ret); 17717f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 17727f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17737f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17747f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_class = class_create(THIS_MODULE, IPATH_DRV_NAME); 17757f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17767f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (IS_ERR(ipath_class)) { 17777f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = PTR_ERR(ipath_class); 17787f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan printk(KERN_ERR IPATH_DRV_NAME ": Could not create " 17797f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "device class (err %d)\n", -ret); 17807f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 17817f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17827f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17837f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto done; 17847f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 17857f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unregister_chrdev_region(dev, IPATH_NMINORS); 17867f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivandone: 17877f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 17887f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 17897f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17907f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic void user_cleanup(void) 17917f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 17927f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ipath_class) { 17937f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan class_destroy(ipath_class); 17947f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_class = NULL; 17957f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 17967f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 17977f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan unregister_chrdev_region(dev, IPATH_NMINORS); 17987f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 17997f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18007f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic atomic_t user_count = ATOMIC_INIT(0); 18017f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanstatic atomic_t user_setup = ATOMIC_INIT(0); 18027f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18037f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanint ipath_user_add(struct ipath_devdata *dd) 18047f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 18057f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan char name[10]; 18067f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan int ret; 18077f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18087f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_inc_return(&user_count) == 1) { 18097f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = user_init(); 18107f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 18117f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Unable to set up user support: " 18127f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "error %d\n", -ret); 18137f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 18147f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 18157f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = init_cdev(0, "ipath", &ipath_file_ops, &wildcard_cdev, 18167f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan &wildcard_class_dev); 18177f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) { 18187f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Could not create wildcard " 18197f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan "minor: error %d\n", -ret); 1820a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan goto bail_sma; 18217f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 18227f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18237f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_set(&user_setup, 1); 18247f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 18257f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18267f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan snprintf(name, sizeof(name), "ipath%d", dd->ipath_unit); 18277f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18287f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ret = init_cdev(dd->ipath_unit + 1, name, &ipath_file_ops, 1829a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan &dd->user_cdev, &dd->user_class_dev); 18307f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (ret < 0) 18317f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan ipath_dev_err(dd, "Could not create user minor %d, %s\n", 18327f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan dd->ipath_unit + 1, name); 18337f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18347f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 18357f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18367f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail_sma: 18377f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan user_cleanup(); 18387f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 18397f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return ret; 18407f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 18417f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 1842a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivanvoid ipath_user_remove(struct ipath_devdata *dd) 18437f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan{ 1844a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1Bryan O'Sullivan cleanup_cdev(&dd->user_cdev, &dd->user_class_dev); 18457f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18467f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_dec_return(&user_count) == 0) { 18477f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan if (atomic_read(&user_setup) == 0) 18487f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan goto bail; 18497f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18507f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan cleanup_cdev(&wildcard_cdev, &wildcard_class_dev); 18517f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan user_cleanup(); 18527f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan 18537f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan atomic_set(&user_setup, 0); 18547f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan } 18557f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivanbail: 18567f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan return; 18577f510b46e4771cfb89af134b3aa827d46125a2ceBryan O'Sullivan} 1858f37bda92461313ad3bbfbf5660adc849c69718bfBryan O'Sullivan 1859