2618 lines
72 KiB
C
2618 lines
72 KiB
C
/*
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* Copyright (c) 2006, 2007, 2008 QLogic Corporation. All rights reserved.
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* Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/pci.h>
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#include <linux/poll.h>
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#include <linux/cdev.h>
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#include <linux/swap.h>
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#include <linux/vmalloc.h>
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#include <linux/slab.h>
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#include <linux/highmem.h>
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#include <linux/io.h>
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#include <linux/jiffies.h>
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#include <linux/smp_lock.h>
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#include <asm/pgtable.h>
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#include "ipath_kernel.h"
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#include "ipath_common.h"
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#include "ipath_user_sdma.h"
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static int ipath_open(struct inode *, struct file *);
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static int ipath_close(struct inode *, struct file *);
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static ssize_t ipath_write(struct file *, const char __user *, size_t,
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loff_t *);
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static ssize_t ipath_writev(struct kiocb *, const struct iovec *,
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unsigned long , loff_t);
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static unsigned int ipath_poll(struct file *, struct poll_table_struct *);
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static int ipath_mmap(struct file *, struct vm_area_struct *);
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static const struct file_operations ipath_file_ops = {
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.owner = THIS_MODULE,
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.write = ipath_write,
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.aio_write = ipath_writev,
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.open = ipath_open,
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.release = ipath_close,
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.poll = ipath_poll,
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.mmap = ipath_mmap
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};
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/*
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* Convert kernel virtual addresses to physical addresses so they don't
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* potentially conflict with the chip addresses used as mmap offsets.
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* It doesn't really matter what mmap offset we use as long as we can
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* interpret it correctly.
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*/
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static u64 cvt_kvaddr(void *p)
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{
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struct page *page;
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u64 paddr = 0;
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page = vmalloc_to_page(p);
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if (page)
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paddr = page_to_pfn(page) << PAGE_SHIFT;
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return paddr;
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}
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static int ipath_get_base_info(struct file *fp,
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void __user *ubase, size_t ubase_size)
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{
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struct ipath_portdata *pd = port_fp(fp);
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int ret = 0;
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struct ipath_base_info *kinfo = NULL;
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struct ipath_devdata *dd = pd->port_dd;
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unsigned subport_cnt;
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int shared, master;
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size_t sz;
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subport_cnt = pd->port_subport_cnt;
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if (!subport_cnt) {
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shared = 0;
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master = 0;
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subport_cnt = 1;
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} else {
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shared = 1;
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master = !subport_fp(fp);
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}
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sz = sizeof(*kinfo);
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/* If port sharing is not requested, allow the old size structure */
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if (!shared)
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sz -= 7 * sizeof(u64);
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if (ubase_size < sz) {
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ipath_cdbg(PROC,
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"Base size %zu, need %zu (version mismatch?)\n",
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ubase_size, sz);
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ret = -EINVAL;
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goto bail;
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}
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kinfo = kzalloc(sizeof(*kinfo), GFP_KERNEL);
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if (kinfo == NULL) {
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ret = -ENOMEM;
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goto bail;
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}
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ret = dd->ipath_f_get_base_info(pd, kinfo);
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if (ret < 0)
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goto bail;
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kinfo->spi_rcvhdr_cnt = dd->ipath_rcvhdrcnt;
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kinfo->spi_rcvhdrent_size = dd->ipath_rcvhdrentsize;
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kinfo->spi_tidegrcnt = dd->ipath_rcvegrcnt;
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kinfo->spi_rcv_egrbufsize = dd->ipath_rcvegrbufsize;
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/*
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* have to mmap whole thing
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*/
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kinfo->spi_rcv_egrbuftotlen =
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pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size;
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kinfo->spi_rcv_egrperchunk = pd->port_rcvegrbufs_perchunk;
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kinfo->spi_rcv_egrchunksize = kinfo->spi_rcv_egrbuftotlen /
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pd->port_rcvegrbuf_chunks;
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kinfo->spi_tidcnt = dd->ipath_rcvtidcnt / subport_cnt;
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if (master)
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kinfo->spi_tidcnt += dd->ipath_rcvtidcnt % subport_cnt;
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/*
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* for this use, may be ipath_cfgports summed over all chips that
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* are are configured and present
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*/
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kinfo->spi_nports = dd->ipath_cfgports;
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/* unit (chip/board) our port is on */
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kinfo->spi_unit = dd->ipath_unit;
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/* for now, only a single page */
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kinfo->spi_tid_maxsize = PAGE_SIZE;
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/*
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* Doing this per port, and based on the skip value, etc. This has
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* to be the actual buffer size, since the protocol code treats it
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* as an array.
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*
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* These have to be set to user addresses in the user code via mmap.
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* These values are used on return to user code for the mmap target
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* addresses only. For 32 bit, same 44 bit address problem, so use
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* the physical address, not virtual. Before 2.6.11, using the
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* page_address() macro worked, but in 2.6.11, even that returns the
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* full 64 bit address (upper bits all 1's). So far, using the
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* physical addresses (or chip offsets, for chip mapping) works, but
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* no doubt some future kernel release will change that, and we'll be
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* on to yet another method of dealing with this.
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*/
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kinfo->spi_rcvhdr_base = (u64) pd->port_rcvhdrq_phys;
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kinfo->spi_rcvhdr_tailaddr = (u64) pd->port_rcvhdrqtailaddr_phys;
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kinfo->spi_rcv_egrbufs = (u64) pd->port_rcvegr_phys;
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kinfo->spi_pioavailaddr = (u64) dd->ipath_pioavailregs_phys;
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kinfo->spi_status = (u64) kinfo->spi_pioavailaddr +
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(void *) dd->ipath_statusp -
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(void *) dd->ipath_pioavailregs_dma;
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if (!shared) {
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kinfo->spi_piocnt = pd->port_piocnt;
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kinfo->spi_piobufbase = (u64) pd->port_piobufs;
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kinfo->__spi_uregbase = (u64) dd->ipath_uregbase +
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dd->ipath_ureg_align * pd->port_port;
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} else if (master) {
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kinfo->spi_piocnt = (pd->port_piocnt / subport_cnt) +
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(pd->port_piocnt % subport_cnt);
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/* Master's PIO buffers are after all the slave's */
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kinfo->spi_piobufbase = (u64) pd->port_piobufs +
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dd->ipath_palign *
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(pd->port_piocnt - kinfo->spi_piocnt);
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} else {
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unsigned slave = subport_fp(fp) - 1;
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kinfo->spi_piocnt = pd->port_piocnt / subport_cnt;
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kinfo->spi_piobufbase = (u64) pd->port_piobufs +
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dd->ipath_palign * kinfo->spi_piocnt * slave;
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}
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if (shared) {
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kinfo->spi_port_uregbase = (u64) dd->ipath_uregbase +
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dd->ipath_ureg_align * pd->port_port;
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kinfo->spi_port_rcvegrbuf = kinfo->spi_rcv_egrbufs;
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kinfo->spi_port_rcvhdr_base = kinfo->spi_rcvhdr_base;
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kinfo->spi_port_rcvhdr_tailaddr = kinfo->spi_rcvhdr_tailaddr;
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kinfo->__spi_uregbase = cvt_kvaddr(pd->subport_uregbase +
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PAGE_SIZE * subport_fp(fp));
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kinfo->spi_rcvhdr_base = cvt_kvaddr(pd->subport_rcvhdr_base +
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pd->port_rcvhdrq_size * subport_fp(fp));
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kinfo->spi_rcvhdr_tailaddr = 0;
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kinfo->spi_rcv_egrbufs = cvt_kvaddr(pd->subport_rcvegrbuf +
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pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size *
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subport_fp(fp));
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kinfo->spi_subport_uregbase =
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cvt_kvaddr(pd->subport_uregbase);
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kinfo->spi_subport_rcvegrbuf =
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cvt_kvaddr(pd->subport_rcvegrbuf);
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kinfo->spi_subport_rcvhdr_base =
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cvt_kvaddr(pd->subport_rcvhdr_base);
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ipath_cdbg(PROC, "port %u flags %x %llx %llx %llx\n",
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kinfo->spi_port, kinfo->spi_runtime_flags,
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(unsigned long long) kinfo->spi_subport_uregbase,
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(unsigned long long) kinfo->spi_subport_rcvegrbuf,
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(unsigned long long) kinfo->spi_subport_rcvhdr_base);
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}
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/*
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* All user buffers are 2KB buffers. If we ever support
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* giving 4KB buffers to user processes, this will need some
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* work.
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*/
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kinfo->spi_pioindex = (kinfo->spi_piobufbase -
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(dd->ipath_piobufbase & 0xffffffff)) / dd->ipath_palign;
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kinfo->spi_pioalign = dd->ipath_palign;
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kinfo->spi_qpair = IPATH_KD_QP;
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/*
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* user mode PIO buffers are always 2KB, even when 4KB can
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* be received, and sent via the kernel; this is ibmaxlen
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* for 2K MTU.
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*/
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kinfo->spi_piosize = dd->ipath_piosize2k - 2 * sizeof(u32);
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kinfo->spi_mtu = dd->ipath_ibmaxlen; /* maxlen, not ibmtu */
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kinfo->spi_port = pd->port_port;
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kinfo->spi_subport = subport_fp(fp);
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kinfo->spi_sw_version = IPATH_KERN_SWVERSION;
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kinfo->spi_hw_version = dd->ipath_revision;
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if (master) {
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kinfo->spi_runtime_flags |= IPATH_RUNTIME_MASTER;
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}
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sz = (ubase_size < sizeof(*kinfo)) ? ubase_size : sizeof(*kinfo);
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if (copy_to_user(ubase, kinfo, sz))
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ret = -EFAULT;
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bail:
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kfree(kinfo);
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return ret;
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}
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/**
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* ipath_tid_update - update a port TID
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* @pd: the port
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* @fp: the ipath device file
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* @ti: the TID information
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*
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* The new implementation as of Oct 2004 is that the driver assigns
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* the tid and returns it to the caller. To make it easier to
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* catch bugs, and to reduce search time, we keep a cursor for
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* each port, walking the shadow tid array to find one that's not
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* in use.
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*
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* For now, if we can't allocate the full list, we fail, although
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* in the long run, we'll allocate as many as we can, and the
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* caller will deal with that by trying the remaining pages later.
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* That means that when we fail, we have to mark the tids as not in
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* use again, in our shadow copy.
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*
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* It's up to the caller to free the tids when they are done.
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* We'll unlock the pages as they free them.
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*
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* Also, right now we are locking one page at a time, but since
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* the intended use of this routine is for a single group of
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* virtually contiguous pages, that should change to improve
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* performance.
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*/
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static int ipath_tid_update(struct ipath_portdata *pd, struct file *fp,
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const struct ipath_tid_info *ti)
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{
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int ret = 0, ntids;
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u32 tid, porttid, cnt, i, tidcnt, tidoff;
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u16 *tidlist;
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struct ipath_devdata *dd = pd->port_dd;
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u64 physaddr;
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unsigned long vaddr;
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u64 __iomem *tidbase;
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unsigned long tidmap[8];
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struct page **pagep = NULL;
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unsigned subport = subport_fp(fp);
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|
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if (!dd->ipath_pageshadow) {
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ret = -ENOMEM;
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goto done;
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}
|
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cnt = ti->tidcnt;
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if (!cnt) {
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ipath_dbg("After copyin, tidcnt 0, tidlist %llx\n",
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(unsigned long long) ti->tidlist);
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/*
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* Should we treat as success? likely a bug
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*/
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ret = -EFAULT;
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goto done;
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}
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porttid = pd->port_port * dd->ipath_rcvtidcnt;
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if (!pd->port_subport_cnt) {
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tidcnt = dd->ipath_rcvtidcnt;
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tid = pd->port_tidcursor;
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tidoff = 0;
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} else if (!subport) {
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tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) +
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(dd->ipath_rcvtidcnt % pd->port_subport_cnt);
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tidoff = dd->ipath_rcvtidcnt - tidcnt;
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porttid += tidoff;
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tid = tidcursor_fp(fp);
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} else {
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tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt;
|
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tidoff = tidcnt * (subport - 1);
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porttid += tidoff;
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tid = tidcursor_fp(fp);
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}
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if (cnt > tidcnt) {
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/* make sure it all fits in port_tid_pg_list */
|
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dev_info(&dd->pcidev->dev, "Process tried to allocate %u "
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"TIDs, only trying max (%u)\n", cnt, tidcnt);
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cnt = tidcnt;
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}
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pagep = &((struct page **) pd->port_tid_pg_list)[tidoff];
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tidlist = &((u16 *) &pagep[dd->ipath_rcvtidcnt])[tidoff];
|
|
|
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memset(tidmap, 0, sizeof(tidmap));
|
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/* before decrement; chip actual # */
|
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ntids = tidcnt;
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tidbase = (u64 __iomem *) (((char __iomem *) dd->ipath_kregbase) +
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dd->ipath_rcvtidbase +
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porttid * sizeof(*tidbase));
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|
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ipath_cdbg(VERBOSE, "Port%u %u tids, cursor %u, tidbase %p\n",
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pd->port_port, cnt, tid, tidbase);
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|
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/* virtual address of first page in transfer */
|
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vaddr = ti->tidvaddr;
|
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if (!access_ok(VERIFY_WRITE, (void __user *) vaddr,
|
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cnt * PAGE_SIZE)) {
|
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ipath_dbg("Fail vaddr %p, %u pages, !access_ok\n",
|
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(void *)vaddr, cnt);
|
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ret = -EFAULT;
|
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goto done;
|
|
}
|
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ret = ipath_get_user_pages(vaddr, cnt, pagep);
|
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if (ret) {
|
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if (ret == -EBUSY) {
|
|
ipath_dbg("Failed to lock addr %p, %u pages "
|
|
"(already locked)\n",
|
|
(void *) vaddr, cnt);
|
|
/*
|
|
* for now, continue, and see what happens but with
|
|
* the new implementation, this should never happen,
|
|
* unless perhaps the user has mpin'ed the pages
|
|
* themselves (something we need to test)
|
|
*/
|
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ret = 0;
|
|
} else {
|
|
dev_info(&dd->pcidev->dev,
|
|
"Failed to lock addr %p, %u pages: "
|
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"errno %d\n", (void *) vaddr, cnt, -ret);
|
|
goto done;
|
|
}
|
|
}
|
|
for (i = 0; i < cnt; i++, vaddr += PAGE_SIZE) {
|
|
for (; ntids--; tid++) {
|
|
if (tid == tidcnt)
|
|
tid = 0;
|
|
if (!dd->ipath_pageshadow[porttid + tid])
|
|
break;
|
|
}
|
|
if (ntids < 0) {
|
|
/*
|
|
* oops, wrapped all the way through their TIDs,
|
|
* and didn't have enough free; see comments at
|
|
* start of routine
|
|
*/
|
|
ipath_dbg("Not enough free TIDs for %u pages "
|
|
"(index %d), failing\n", cnt, i);
|
|
i--; /* last tidlist[i] not filled in */
|
|
ret = -ENOMEM;
|
|
break;
|
|
}
|
|
tidlist[i] = tid + tidoff;
|
|
ipath_cdbg(VERBOSE, "Updating idx %u to TID %u, "
|
|
"vaddr %lx\n", i, tid + tidoff, vaddr);
|
|
/* we "know" system pages and TID pages are same size */
|
|
dd->ipath_pageshadow[porttid + tid] = pagep[i];
|
|
dd->ipath_physshadow[porttid + tid] = ipath_map_page(
|
|
dd->pcidev, pagep[i], 0, PAGE_SIZE,
|
|
PCI_DMA_FROMDEVICE);
|
|
/*
|
|
* don't need atomic or it's overhead
|
|
*/
|
|
__set_bit(tid, tidmap);
|
|
physaddr = dd->ipath_physshadow[porttid + tid];
|
|
ipath_stats.sps_pagelocks++;
|
|
ipath_cdbg(VERBOSE,
|
|
"TID %u, vaddr %lx, physaddr %llx pgp %p\n",
|
|
tid, vaddr, (unsigned long long) physaddr,
|
|
pagep[i]);
|
|
dd->ipath_f_put_tid(dd, &tidbase[tid], RCVHQ_RCV_TYPE_EXPECTED,
|
|
physaddr);
|
|
/*
|
|
* don't check this tid in ipath_portshadow, since we
|
|
* just filled it in; start with the next one.
|
|
*/
|
|
tid++;
|
|
}
|
|
|
|
if (ret) {
|
|
u32 limit;
|
|
cleanup:
|
|
/* jump here if copy out of updated info failed... */
|
|
ipath_dbg("After failure (ret=%d), undo %d of %d entries\n",
|
|
-ret, i, cnt);
|
|
/* same code that's in ipath_free_tid() */
|
|
limit = sizeof(tidmap) * BITS_PER_BYTE;
|
|
if (limit > tidcnt)
|
|
/* just in case size changes in future */
|
|
limit = tidcnt;
|
|
tid = find_first_bit((const unsigned long *)tidmap, limit);
|
|
for (; tid < limit; tid++) {
|
|
if (!test_bit(tid, tidmap))
|
|
continue;
|
|
if (dd->ipath_pageshadow[porttid + tid]) {
|
|
ipath_cdbg(VERBOSE, "Freeing TID %u\n",
|
|
tid);
|
|
dd->ipath_f_put_tid(dd, &tidbase[tid],
|
|
RCVHQ_RCV_TYPE_EXPECTED,
|
|
dd->ipath_tidinvalid);
|
|
pci_unmap_page(dd->pcidev,
|
|
dd->ipath_physshadow[porttid + tid],
|
|
PAGE_SIZE, PCI_DMA_FROMDEVICE);
|
|
dd->ipath_pageshadow[porttid + tid] = NULL;
|
|
ipath_stats.sps_pageunlocks++;
|
|
}
|
|
}
|
|
ipath_release_user_pages(pagep, cnt);
|
|
} else {
|
|
/*
|
|
* Copy the updated array, with ipath_tid's filled in, back
|
|
* to user. Since we did the copy in already, this "should
|
|
* never fail" If it does, we have to clean up...
|
|
*/
|
|
if (copy_to_user((void __user *)
|
|
(unsigned long) ti->tidlist,
|
|
tidlist, cnt * sizeof(*tidlist))) {
|
|
ret = -EFAULT;
|
|
goto cleanup;
|
|
}
|
|
if (copy_to_user((void __user *) (unsigned long) ti->tidmap,
|
|
tidmap, sizeof tidmap)) {
|
|
ret = -EFAULT;
|
|
goto cleanup;
|
|
}
|
|
if (tid == tidcnt)
|
|
tid = 0;
|
|
if (!pd->port_subport_cnt)
|
|
pd->port_tidcursor = tid;
|
|
else
|
|
tidcursor_fp(fp) = tid;
|
|
}
|
|
|
|
done:
|
|
if (ret)
|
|
ipath_dbg("Failed to map %u TID pages, failing with %d\n",
|
|
ti->tidcnt, -ret);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ipath_tid_free - free a port TID
|
|
* @pd: the port
|
|
* @subport: the subport
|
|
* @ti: the TID info
|
|
*
|
|
* right now we are unlocking one page at a time, but since
|
|
* the intended use of this routine is for a single group of
|
|
* virtually contiguous pages, that should change to improve
|
|
* performance. We check that the TID is in range for this port
|
|
* but otherwise don't check validity; if user has an error and
|
|
* frees the wrong tid, it's only their own data that can thereby
|
|
* be corrupted. We do check that the TID was in use, for sanity
|
|
* We always use our idea of the saved address, not the address that
|
|
* they pass in to us.
|
|
*/
|
|
|
|
static int ipath_tid_free(struct ipath_portdata *pd, unsigned subport,
|
|
const struct ipath_tid_info *ti)
|
|
{
|
|
int ret = 0;
|
|
u32 tid, porttid, cnt, limit, tidcnt;
|
|
struct ipath_devdata *dd = pd->port_dd;
|
|
u64 __iomem *tidbase;
|
|
unsigned long tidmap[8];
|
|
|
|
if (!dd->ipath_pageshadow) {
|
|
ret = -ENOMEM;
|
|
goto done;
|
|
}
|
|
|
|
if (copy_from_user(tidmap, (void __user *)(unsigned long)ti->tidmap,
|
|
sizeof tidmap)) {
|
|
ret = -EFAULT;
|
|
goto done;
|
|
}
|
|
|
|
porttid = pd->port_port * dd->ipath_rcvtidcnt;
|
|
if (!pd->port_subport_cnt)
|
|
tidcnt = dd->ipath_rcvtidcnt;
|
|
else if (!subport) {
|
|
tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) +
|
|
(dd->ipath_rcvtidcnt % pd->port_subport_cnt);
|
|
porttid += dd->ipath_rcvtidcnt - tidcnt;
|
|
} else {
|
|
tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt;
|
|
porttid += tidcnt * (subport - 1);
|
|
}
|
|
tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) +
|
|
dd->ipath_rcvtidbase +
|
|
porttid * sizeof(*tidbase));
|
|
|
|
limit = sizeof(tidmap) * BITS_PER_BYTE;
|
|
if (limit > tidcnt)
|
|
/* just in case size changes in future */
|
|
limit = tidcnt;
|
|
tid = find_first_bit(tidmap, limit);
|
|
ipath_cdbg(VERBOSE, "Port%u free %u tids; first bit (max=%d) "
|
|
"set is %d, porttid %u\n", pd->port_port, ti->tidcnt,
|
|
limit, tid, porttid);
|
|
for (cnt = 0; tid < limit; tid++) {
|
|
/*
|
|
* small optimization; if we detect a run of 3 or so without
|
|
* any set, use find_first_bit again. That's mainly to
|
|
* accelerate the case where we wrapped, so we have some at
|
|
* the beginning, and some at the end, and a big gap
|
|
* in the middle.
|
|
*/
|
|
if (!test_bit(tid, tidmap))
|
|
continue;
|
|
cnt++;
|
|
if (dd->ipath_pageshadow[porttid + tid]) {
|
|
struct page *p;
|
|
p = dd->ipath_pageshadow[porttid + tid];
|
|
dd->ipath_pageshadow[porttid + tid] = NULL;
|
|
ipath_cdbg(VERBOSE, "PID %u freeing TID %u\n",
|
|
pid_nr(pd->port_pid), tid);
|
|
dd->ipath_f_put_tid(dd, &tidbase[tid],
|
|
RCVHQ_RCV_TYPE_EXPECTED,
|
|
dd->ipath_tidinvalid);
|
|
pci_unmap_page(dd->pcidev,
|
|
dd->ipath_physshadow[porttid + tid],
|
|
PAGE_SIZE, PCI_DMA_FROMDEVICE);
|
|
ipath_release_user_pages(&p, 1);
|
|
ipath_stats.sps_pageunlocks++;
|
|
} else
|
|
ipath_dbg("Unused tid %u, ignoring\n", tid);
|
|
}
|
|
if (cnt != ti->tidcnt)
|
|
ipath_dbg("passed in tidcnt %d, only %d bits set in map\n",
|
|
ti->tidcnt, cnt);
|
|
done:
|
|
if (ret)
|
|
ipath_dbg("Failed to unmap %u TID pages, failing with %d\n",
|
|
ti->tidcnt, -ret);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ipath_set_part_key - set a partition key
|
|
* @pd: the port
|
|
* @key: the key
|
|
*
|
|
* We can have up to 4 active at a time (other than the default, which is
|
|
* always allowed). This is somewhat tricky, since multiple ports may set
|
|
* the same key, so we reference count them, and clean up at exit. All 4
|
|
* partition keys are packed into a single infinipath register. It's an
|
|
* error for a process to set the same pkey multiple times. We provide no
|
|
* mechanism to de-allocate a pkey at this time, we may eventually need to
|
|
* do that. I've used the atomic operations, and no locking, and only make
|
|
* a single pass through what's available. This should be more than
|
|
* adequate for some time. I'll think about spinlocks or the like if and as
|
|
* it's necessary.
|
|
*/
|
|
static int ipath_set_part_key(struct ipath_portdata *pd, u16 key)
|
|
{
|
|
struct ipath_devdata *dd = pd->port_dd;
|
|
int i, any = 0, pidx = -1;
|
|
u16 lkey = key & 0x7FFF;
|
|
int ret;
|
|
|
|
if (lkey == (IPATH_DEFAULT_P_KEY & 0x7FFF)) {
|
|
/* nothing to do; this key always valid */
|
|
ret = 0;
|
|
goto bail;
|
|
}
|
|
|
|
ipath_cdbg(VERBOSE, "p%u try to set pkey %hx, current keys "
|
|
"%hx:%x %hx:%x %hx:%x %hx:%x\n",
|
|
pd->port_port, key, dd->ipath_pkeys[0],
|
|
atomic_read(&dd->ipath_pkeyrefs[0]), dd->ipath_pkeys[1],
|
|
atomic_read(&dd->ipath_pkeyrefs[1]), dd->ipath_pkeys[2],
|
|
atomic_read(&dd->ipath_pkeyrefs[2]), dd->ipath_pkeys[3],
|
|
atomic_read(&dd->ipath_pkeyrefs[3]));
|
|
|
|
if (!lkey) {
|
|
ipath_cdbg(PROC, "p%u tries to set key 0, not allowed\n",
|
|
pd->port_port);
|
|
ret = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
/*
|
|
* Set the full membership bit, because it has to be
|
|
* set in the register or the packet, and it seems
|
|
* cleaner to set in the register than to force all
|
|
* callers to set it. (see bug 4331)
|
|
*/
|
|
key |= 0x8000;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) {
|
|
if (!pd->port_pkeys[i] && pidx == -1)
|
|
pidx = i;
|
|
if (pd->port_pkeys[i] == key) {
|
|
ipath_cdbg(VERBOSE, "p%u tries to set same pkey "
|
|
"(%x) more than once\n",
|
|
pd->port_port, key);
|
|
ret = -EEXIST;
|
|
goto bail;
|
|
}
|
|
}
|
|
if (pidx == -1) {
|
|
ipath_dbg("All pkeys for port %u already in use, "
|
|
"can't set %x\n", pd->port_port, key);
|
|
ret = -EBUSY;
|
|
goto bail;
|
|
}
|
|
for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
|
|
if (!dd->ipath_pkeys[i]) {
|
|
any++;
|
|
continue;
|
|
}
|
|
if (dd->ipath_pkeys[i] == key) {
|
|
atomic_t *pkrefs = &dd->ipath_pkeyrefs[i];
|
|
|
|
if (atomic_inc_return(pkrefs) > 1) {
|
|
pd->port_pkeys[pidx] = key;
|
|
ipath_cdbg(VERBOSE, "p%u set key %x "
|
|
"matches #%d, count now %d\n",
|
|
pd->port_port, key, i,
|
|
atomic_read(pkrefs));
|
|
ret = 0;
|
|
goto bail;
|
|
} else {
|
|
/*
|
|
* lost race, decrement count, catch below
|
|
*/
|
|
atomic_dec(pkrefs);
|
|
ipath_cdbg(VERBOSE, "Lost race, count was "
|
|
"0, after dec, it's %d\n",
|
|
atomic_read(pkrefs));
|
|
any++;
|
|
}
|
|
}
|
|
if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) {
|
|
/*
|
|
* It makes no sense to have both the limited and
|
|
* full membership PKEY set at the same time since
|
|
* the unlimited one will disable the limited one.
|
|
*/
|
|
ret = -EEXIST;
|
|
goto bail;
|
|
}
|
|
}
|
|
if (!any) {
|
|
ipath_dbg("port %u, all pkeys already in use, "
|
|
"can't set %x\n", pd->port_port, key);
|
|
ret = -EBUSY;
|
|
goto bail;
|
|
}
|
|
for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
|
|
if (!dd->ipath_pkeys[i] &&
|
|
atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) {
|
|
u64 pkey;
|
|
|
|
/* for ipathstats, etc. */
|
|
ipath_stats.sps_pkeys[i] = lkey;
|
|
pd->port_pkeys[pidx] = dd->ipath_pkeys[i] = key;
|
|
pkey =
|
|
(u64) dd->ipath_pkeys[0] |
|
|
((u64) dd->ipath_pkeys[1] << 16) |
|
|
((u64) dd->ipath_pkeys[2] << 32) |
|
|
((u64) dd->ipath_pkeys[3] << 48);
|
|
ipath_cdbg(PROC, "p%u set key %x in #%d, "
|
|
"portidx %d, new pkey reg %llx\n",
|
|
pd->port_port, key, i, pidx,
|
|
(unsigned long long) pkey);
|
|
ipath_write_kreg(
|
|
dd, dd->ipath_kregs->kr_partitionkey, pkey);
|
|
|
|
ret = 0;
|
|
goto bail;
|
|
}
|
|
}
|
|
ipath_dbg("port %u, all pkeys already in use 2nd pass, "
|
|
"can't set %x\n", pd->port_port, key);
|
|
ret = -EBUSY;
|
|
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ipath_manage_rcvq - manage a port's receive queue
|
|
* @pd: the port
|
|
* @subport: the subport
|
|
* @start_stop: action to carry out
|
|
*
|
|
* start_stop == 0 disables receive on the port, for use in queue
|
|
* overflow conditions. start_stop==1 re-enables, to be used to
|
|
* re-init the software copy of the head register
|
|
*/
|
|
static int ipath_manage_rcvq(struct ipath_portdata *pd, unsigned subport,
|
|
int start_stop)
|
|
{
|
|
struct ipath_devdata *dd = pd->port_dd;
|
|
|
|
ipath_cdbg(PROC, "%sabling rcv for unit %u port %u:%u\n",
|
|
start_stop ? "en" : "dis", dd->ipath_unit,
|
|
pd->port_port, subport);
|
|
if (subport)
|
|
goto bail;
|
|
/* atomically clear receive enable port. */
|
|
if (start_stop) {
|
|
/*
|
|
* On enable, force in-memory copy of the tail register to
|
|
* 0, so that protocol code doesn't have to worry about
|
|
* whether or not the chip has yet updated the in-memory
|
|
* copy or not on return from the system call. The chip
|
|
* always resets it's tail register back to 0 on a
|
|
* transition from disabled to enabled. This could cause a
|
|
* problem if software was broken, and did the enable w/o
|
|
* the disable, but eventually the in-memory copy will be
|
|
* updated and correct itself, even in the face of software
|
|
* bugs.
|
|
*/
|
|
if (pd->port_rcvhdrtail_kvaddr)
|
|
ipath_clear_rcvhdrtail(pd);
|
|
set_bit(dd->ipath_r_portenable_shift + pd->port_port,
|
|
&dd->ipath_rcvctrl);
|
|
} else
|
|
clear_bit(dd->ipath_r_portenable_shift + pd->port_port,
|
|
&dd->ipath_rcvctrl);
|
|
ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
|
|
dd->ipath_rcvctrl);
|
|
/* now be sure chip saw it before we return */
|
|
ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
|
|
if (start_stop) {
|
|
/*
|
|
* And try to be sure that tail reg update has happened too.
|
|
* This should in theory interlock with the RXE changes to
|
|
* the tail register. Don't assign it to the tail register
|
|
* in memory copy, since we could overwrite an update by the
|
|
* chip if we did.
|
|
*/
|
|
ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port);
|
|
}
|
|
/* always; new head should be equal to new tail; see above */
|
|
bail:
|
|
return 0;
|
|
}
|
|
|
|
static void ipath_clean_part_key(struct ipath_portdata *pd,
|
|
struct ipath_devdata *dd)
|
|
{
|
|
int i, j, pchanged = 0;
|
|
u64 oldpkey;
|
|
|
|
/* for debugging only */
|
|
oldpkey = (u64) dd->ipath_pkeys[0] |
|
|
((u64) dd->ipath_pkeys[1] << 16) |
|
|
((u64) dd->ipath_pkeys[2] << 32) |
|
|
((u64) dd->ipath_pkeys[3] << 48);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) {
|
|
if (!pd->port_pkeys[i])
|
|
continue;
|
|
ipath_cdbg(VERBOSE, "look for key[%d] %hx in pkeys\n", i,
|
|
pd->port_pkeys[i]);
|
|
for (j = 0; j < ARRAY_SIZE(dd->ipath_pkeys); j++) {
|
|
/* check for match independent of the global bit */
|
|
if ((dd->ipath_pkeys[j] & 0x7fff) !=
|
|
(pd->port_pkeys[i] & 0x7fff))
|
|
continue;
|
|
if (atomic_dec_and_test(&dd->ipath_pkeyrefs[j])) {
|
|
ipath_cdbg(VERBOSE, "p%u clear key "
|
|
"%x matches #%d\n",
|
|
pd->port_port,
|
|
pd->port_pkeys[i], j);
|
|
ipath_stats.sps_pkeys[j] =
|
|
dd->ipath_pkeys[j] = 0;
|
|
pchanged++;
|
|
}
|
|
else ipath_cdbg(
|
|
VERBOSE, "p%u key %x matches #%d, "
|
|
"but ref still %d\n", pd->port_port,
|
|
pd->port_pkeys[i], j,
|
|
atomic_read(&dd->ipath_pkeyrefs[j]));
|
|
break;
|
|
}
|
|
pd->port_pkeys[i] = 0;
|
|
}
|
|
if (pchanged) {
|
|
u64 pkey = (u64) dd->ipath_pkeys[0] |
|
|
((u64) dd->ipath_pkeys[1] << 16) |
|
|
((u64) dd->ipath_pkeys[2] << 32) |
|
|
((u64) dd->ipath_pkeys[3] << 48);
|
|
ipath_cdbg(VERBOSE, "p%u old pkey reg %llx, "
|
|
"new pkey reg %llx\n", pd->port_port,
|
|
(unsigned long long) oldpkey,
|
|
(unsigned long long) pkey);
|
|
ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey,
|
|
pkey);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Initialize the port data with the receive buffer sizes
|
|
* so this can be done while the master port is locked.
|
|
* Otherwise, there is a race with a slave opening the port
|
|
* and seeing these fields uninitialized.
|
|
*/
|
|
static void init_user_egr_sizes(struct ipath_portdata *pd)
|
|
{
|
|
struct ipath_devdata *dd = pd->port_dd;
|
|
unsigned egrperchunk, egrcnt, size;
|
|
|
|
/*
|
|
* to avoid wasting a lot of memory, we allocate 32KB chunks of
|
|
* physically contiguous memory, advance through it until used up
|
|
* and then allocate more. Of course, we need memory to store those
|
|
* extra pointers, now. Started out with 256KB, but under heavy
|
|
* memory pressure (creating large files and then copying them over
|
|
* NFS while doing lots of MPI jobs), we hit some allocation
|
|
* failures, even though we can sleep... (2.6.10) Still get
|
|
* failures at 64K. 32K is the lowest we can go without wasting
|
|
* additional memory.
|
|
*/
|
|
size = 0x8000;
|
|
egrperchunk = size / dd->ipath_rcvegrbufsize;
|
|
egrcnt = dd->ipath_rcvegrcnt;
|
|
pd->port_rcvegrbuf_chunks = (egrcnt + egrperchunk - 1) / egrperchunk;
|
|
pd->port_rcvegrbufs_perchunk = egrperchunk;
|
|
pd->port_rcvegrbuf_size = size;
|
|
}
|
|
|
|
/**
|
|
* ipath_create_user_egr - allocate eager TID buffers
|
|
* @pd: the port to allocate TID buffers for
|
|
*
|
|
* This routine is now quite different for user and kernel, because
|
|
* the kernel uses skb's, for the accelerated network performance
|
|
* This is the user port version
|
|
*
|
|
* Allocate the eager TID buffers and program them into infinipath
|
|
* They are no longer completely contiguous, we do multiple allocation
|
|
* calls.
|
|
*/
|
|
static int ipath_create_user_egr(struct ipath_portdata *pd)
|
|
{
|
|
struct ipath_devdata *dd = pd->port_dd;
|
|
unsigned e, egrcnt, egrperchunk, chunk, egrsize, egroff;
|
|
size_t size;
|
|
int ret;
|
|
gfp_t gfp_flags;
|
|
|
|
/*
|
|
* GFP_USER, but without GFP_FS, so buffer cache can be
|
|
* coalesced (we hope); otherwise, even at order 4,
|
|
* heavy filesystem activity makes these fail, and we can
|
|
* use compound pages.
|
|
*/
|
|
gfp_flags = __GFP_WAIT | __GFP_IO | __GFP_COMP;
|
|
|
|
egrcnt = dd->ipath_rcvegrcnt;
|
|
/* TID number offset for this port */
|
|
egroff = (pd->port_port - 1) * egrcnt + dd->ipath_p0_rcvegrcnt;
|
|
egrsize = dd->ipath_rcvegrbufsize;
|
|
ipath_cdbg(VERBOSE, "Allocating %d egr buffers, at egrtid "
|
|
"offset %x, egrsize %u\n", egrcnt, egroff, egrsize);
|
|
|
|
chunk = pd->port_rcvegrbuf_chunks;
|
|
egrperchunk = pd->port_rcvegrbufs_perchunk;
|
|
size = pd->port_rcvegrbuf_size;
|
|
pd->port_rcvegrbuf = kmalloc(chunk * sizeof(pd->port_rcvegrbuf[0]),
|
|
GFP_KERNEL);
|
|
if (!pd->port_rcvegrbuf) {
|
|
ret = -ENOMEM;
|
|
goto bail;
|
|
}
|
|
pd->port_rcvegrbuf_phys =
|
|
kmalloc(chunk * sizeof(pd->port_rcvegrbuf_phys[0]),
|
|
GFP_KERNEL);
|
|
if (!pd->port_rcvegrbuf_phys) {
|
|
ret = -ENOMEM;
|
|
goto bail_rcvegrbuf;
|
|
}
|
|
for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) {
|
|
|
|
pd->port_rcvegrbuf[e] = dma_alloc_coherent(
|
|
&dd->pcidev->dev, size, &pd->port_rcvegrbuf_phys[e],
|
|
gfp_flags);
|
|
|
|
if (!pd->port_rcvegrbuf[e]) {
|
|
ret = -ENOMEM;
|
|
goto bail_rcvegrbuf_phys;
|
|
}
|
|
}
|
|
|
|
pd->port_rcvegr_phys = pd->port_rcvegrbuf_phys[0];
|
|
|
|
for (e = chunk = 0; chunk < pd->port_rcvegrbuf_chunks; chunk++) {
|
|
dma_addr_t pa = pd->port_rcvegrbuf_phys[chunk];
|
|
unsigned i;
|
|
|
|
for (i = 0; e < egrcnt && i < egrperchunk; e++, i++) {
|
|
dd->ipath_f_put_tid(dd, e + egroff +
|
|
(u64 __iomem *)
|
|
((char __iomem *)
|
|
dd->ipath_kregbase +
|
|
dd->ipath_rcvegrbase),
|
|
RCVHQ_RCV_TYPE_EAGER, pa);
|
|
pa += egrsize;
|
|
}
|
|
cond_resched(); /* don't hog the cpu */
|
|
}
|
|
|
|
ret = 0;
|
|
goto bail;
|
|
|
|
bail_rcvegrbuf_phys:
|
|
for (e = 0; e < pd->port_rcvegrbuf_chunks &&
|
|
pd->port_rcvegrbuf[e]; e++) {
|
|
dma_free_coherent(&dd->pcidev->dev, size,
|
|
pd->port_rcvegrbuf[e],
|
|
pd->port_rcvegrbuf_phys[e]);
|
|
|
|
}
|
|
kfree(pd->port_rcvegrbuf_phys);
|
|
pd->port_rcvegrbuf_phys = NULL;
|
|
bail_rcvegrbuf:
|
|
kfree(pd->port_rcvegrbuf);
|
|
pd->port_rcvegrbuf = NULL;
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
|
|
/* common code for the mappings on dma_alloc_coherent mem */
|
|
static int ipath_mmap_mem(struct vm_area_struct *vma,
|
|
struct ipath_portdata *pd, unsigned len, int write_ok,
|
|
void *kvaddr, char *what)
|
|
{
|
|
struct ipath_devdata *dd = pd->port_dd;
|
|
unsigned long pfn;
|
|
int ret;
|
|
|
|
if ((vma->vm_end - vma->vm_start) > len) {
|
|
dev_info(&dd->pcidev->dev,
|
|
"FAIL on %s: len %lx > %x\n", what,
|
|
vma->vm_end - vma->vm_start, len);
|
|
ret = -EFAULT;
|
|
goto bail;
|
|
}
|
|
|
|
if (!write_ok) {
|
|
if (vma->vm_flags & VM_WRITE) {
|
|
dev_info(&dd->pcidev->dev,
|
|
"%s must be mapped readonly\n", what);
|
|
ret = -EPERM;
|
|
goto bail;
|
|
}
|
|
|
|
/* don't allow them to later change with mprotect */
|
|
vma->vm_flags &= ~VM_MAYWRITE;
|
|
}
|
|
|
|
pfn = virt_to_phys(kvaddr) >> PAGE_SHIFT;
|
|
ret = remap_pfn_range(vma, vma->vm_start, pfn,
|
|
len, vma->vm_page_prot);
|
|
if (ret)
|
|
dev_info(&dd->pcidev->dev, "%s port%u mmap of %lx, %x "
|
|
"bytes r%c failed: %d\n", what, pd->port_port,
|
|
pfn, len, write_ok?'w':'o', ret);
|
|
else
|
|
ipath_cdbg(VERBOSE, "%s port%u mmaped %lx, %x bytes "
|
|
"r%c\n", what, pd->port_port, pfn, len,
|
|
write_ok?'w':'o');
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
static int mmap_ureg(struct vm_area_struct *vma, struct ipath_devdata *dd,
|
|
u64 ureg)
|
|
{
|
|
unsigned long phys;
|
|
int ret;
|
|
|
|
/*
|
|
* This is real hardware, so use io_remap. This is the mechanism
|
|
* for the user process to update the head registers for their port
|
|
* in the chip.
|
|
*/
|
|
if ((vma->vm_end - vma->vm_start) > PAGE_SIZE) {
|
|
dev_info(&dd->pcidev->dev, "FAIL mmap userreg: reqlen "
|
|
"%lx > PAGE\n", vma->vm_end - vma->vm_start);
|
|
ret = -EFAULT;
|
|
} else {
|
|
phys = dd->ipath_physaddr + ureg;
|
|
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
|
|
|
|
vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND;
|
|
ret = io_remap_pfn_range(vma, vma->vm_start,
|
|
phys >> PAGE_SHIFT,
|
|
vma->vm_end - vma->vm_start,
|
|
vma->vm_page_prot);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int mmap_piobufs(struct vm_area_struct *vma,
|
|
struct ipath_devdata *dd,
|
|
struct ipath_portdata *pd,
|
|
unsigned piobufs, unsigned piocnt)
|
|
{
|
|
unsigned long phys;
|
|
int ret;
|
|
|
|
/*
|
|
* When we map the PIO buffers in the chip, we want to map them as
|
|
* writeonly, no read possible. This prevents access to previous
|
|
* process data, and catches users who might try to read the i/o
|
|
* space due to a bug.
|
|
*/
|
|
if ((vma->vm_end - vma->vm_start) > (piocnt * dd->ipath_palign)) {
|
|
dev_info(&dd->pcidev->dev, "FAIL mmap piobufs: "
|
|
"reqlen %lx > PAGE\n",
|
|
vma->vm_end - vma->vm_start);
|
|
ret = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
phys = dd->ipath_physaddr + piobufs;
|
|
|
|
#if defined(__powerpc__)
|
|
/* There isn't a generic way to specify writethrough mappings */
|
|
pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
|
|
pgprot_val(vma->vm_page_prot) |= _PAGE_WRITETHRU;
|
|
pgprot_val(vma->vm_page_prot) &= ~_PAGE_GUARDED;
|
|
#endif
|
|
|
|
/*
|
|
* don't allow them to later change to readable with mprotect (for when
|
|
* not initially mapped readable, as is normally the case)
|
|
*/
|
|
vma->vm_flags &= ~VM_MAYREAD;
|
|
vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND;
|
|
|
|
ret = io_remap_pfn_range(vma, vma->vm_start, phys >> PAGE_SHIFT,
|
|
vma->vm_end - vma->vm_start,
|
|
vma->vm_page_prot);
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
static int mmap_rcvegrbufs(struct vm_area_struct *vma,
|
|
struct ipath_portdata *pd)
|
|
{
|
|
struct ipath_devdata *dd = pd->port_dd;
|
|
unsigned long start, size;
|
|
size_t total_size, i;
|
|
unsigned long pfn;
|
|
int ret;
|
|
|
|
size = pd->port_rcvegrbuf_size;
|
|
total_size = pd->port_rcvegrbuf_chunks * size;
|
|
if ((vma->vm_end - vma->vm_start) > total_size) {
|
|
dev_info(&dd->pcidev->dev, "FAIL on egr bufs: "
|
|
"reqlen %lx > actual %lx\n",
|
|
vma->vm_end - vma->vm_start,
|
|
(unsigned long) total_size);
|
|
ret = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
if (vma->vm_flags & VM_WRITE) {
|
|
dev_info(&dd->pcidev->dev, "Can't map eager buffers as "
|
|
"writable (flags=%lx)\n", vma->vm_flags);
|
|
ret = -EPERM;
|
|
goto bail;
|
|
}
|
|
/* don't allow them to later change to writeable with mprotect */
|
|
vma->vm_flags &= ~VM_MAYWRITE;
|
|
|
|
start = vma->vm_start;
|
|
|
|
for (i = 0; i < pd->port_rcvegrbuf_chunks; i++, start += size) {
|
|
pfn = virt_to_phys(pd->port_rcvegrbuf[i]) >> PAGE_SHIFT;
|
|
ret = remap_pfn_range(vma, start, pfn, size,
|
|
vma->vm_page_prot);
|
|
if (ret < 0)
|
|
goto bail;
|
|
}
|
|
ret = 0;
|
|
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* ipath_file_vma_fault - handle a VMA page fault.
|
|
*/
|
|
static int ipath_file_vma_fault(struct vm_area_struct *vma,
|
|
struct vm_fault *vmf)
|
|
{
|
|
struct page *page;
|
|
|
|
page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT));
|
|
if (!page)
|
|
return VM_FAULT_SIGBUS;
|
|
get_page(page);
|
|
vmf->page = page;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct vm_operations_struct ipath_file_vm_ops = {
|
|
.fault = ipath_file_vma_fault,
|
|
};
|
|
|
|
static int mmap_kvaddr(struct vm_area_struct *vma, u64 pgaddr,
|
|
struct ipath_portdata *pd, unsigned subport)
|
|
{
|
|
unsigned long len;
|
|
struct ipath_devdata *dd;
|
|
void *addr;
|
|
size_t size;
|
|
int ret = 0;
|
|
|
|
/* If the port is not shared, all addresses should be physical */
|
|
if (!pd->port_subport_cnt)
|
|
goto bail;
|
|
|
|
dd = pd->port_dd;
|
|
size = pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size;
|
|
|
|
/*
|
|
* Each process has all the subport uregbase, rcvhdrq, and
|
|
* rcvegrbufs mmapped - as an array for all the processes,
|
|
* and also separately for this process.
|
|
*/
|
|
if (pgaddr == cvt_kvaddr(pd->subport_uregbase)) {
|
|
addr = pd->subport_uregbase;
|
|
size = PAGE_SIZE * pd->port_subport_cnt;
|
|
} else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base)) {
|
|
addr = pd->subport_rcvhdr_base;
|
|
size = pd->port_rcvhdrq_size * pd->port_subport_cnt;
|
|
} else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf)) {
|
|
addr = pd->subport_rcvegrbuf;
|
|
size *= pd->port_subport_cnt;
|
|
} else if (pgaddr == cvt_kvaddr(pd->subport_uregbase +
|
|
PAGE_SIZE * subport)) {
|
|
addr = pd->subport_uregbase + PAGE_SIZE * subport;
|
|
size = PAGE_SIZE;
|
|
} else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base +
|
|
pd->port_rcvhdrq_size * subport)) {
|
|
addr = pd->subport_rcvhdr_base +
|
|
pd->port_rcvhdrq_size * subport;
|
|
size = pd->port_rcvhdrq_size;
|
|
} else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf +
|
|
size * subport)) {
|
|
addr = pd->subport_rcvegrbuf + size * subport;
|
|
/* rcvegrbufs are read-only on the slave */
|
|
if (vma->vm_flags & VM_WRITE) {
|
|
dev_info(&dd->pcidev->dev,
|
|
"Can't map eager buffers as "
|
|
"writable (flags=%lx)\n", vma->vm_flags);
|
|
ret = -EPERM;
|
|
goto bail;
|
|
}
|
|
/*
|
|
* Don't allow permission to later change to writeable
|
|
* with mprotect.
|
|
*/
|
|
vma->vm_flags &= ~VM_MAYWRITE;
|
|
} else {
|
|
goto bail;
|
|
}
|
|
len = vma->vm_end - vma->vm_start;
|
|
if (len > size) {
|
|
ipath_cdbg(MM, "FAIL: reqlen %lx > %zx\n", len, size);
|
|
ret = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
vma->vm_pgoff = (unsigned long) addr >> PAGE_SHIFT;
|
|
vma->vm_ops = &ipath_file_vm_ops;
|
|
vma->vm_flags |= VM_RESERVED | VM_DONTEXPAND;
|
|
ret = 1;
|
|
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ipath_mmap - mmap various structures into user space
|
|
* @fp: the file pointer
|
|
* @vma: the VM area
|
|
*
|
|
* We use this to have a shared buffer between the kernel and the user code
|
|
* for the rcvhdr queue, egr buffers, and the per-port user regs and pio
|
|
* buffers in the chip. We have the open and close entries so we can bump
|
|
* the ref count and keep the driver from being unloaded while still mapped.
|
|
*/
|
|
static int ipath_mmap(struct file *fp, struct vm_area_struct *vma)
|
|
{
|
|
struct ipath_portdata *pd;
|
|
struct ipath_devdata *dd;
|
|
u64 pgaddr, ureg;
|
|
unsigned piobufs, piocnt;
|
|
int ret;
|
|
|
|
pd = port_fp(fp);
|
|
if (!pd) {
|
|
ret = -EINVAL;
|
|
goto bail;
|
|
}
|
|
dd = pd->port_dd;
|
|
|
|
/*
|
|
* This is the ipath_do_user_init() code, mapping the shared buffers
|
|
* into the user process. The address referred to by vm_pgoff is the
|
|
* file offset passed via mmap(). For shared ports, this is the
|
|
* kernel vmalloc() address of the pages to share with the master.
|
|
* For non-shared or master ports, this is a physical address.
|
|
* We only do one mmap for each space mapped.
|
|
*/
|
|
pgaddr = vma->vm_pgoff << PAGE_SHIFT;
|
|
|
|
/*
|
|
* Check for 0 in case one of the allocations failed, but user
|
|
* called mmap anyway.
|
|
*/
|
|
if (!pgaddr) {
|
|
ret = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
ipath_cdbg(MM, "pgaddr %llx vm_start=%lx len %lx port %u:%u:%u\n",
|
|
(unsigned long long) pgaddr, vma->vm_start,
|
|
vma->vm_end - vma->vm_start, dd->ipath_unit,
|
|
pd->port_port, subport_fp(fp));
|
|
|
|
/*
|
|
* Physical addresses must fit in 40 bits for our hardware.
|
|
* Check for kernel virtual addresses first, anything else must
|
|
* match a HW or memory address.
|
|
*/
|
|
ret = mmap_kvaddr(vma, pgaddr, pd, subport_fp(fp));
|
|
if (ret) {
|
|
if (ret > 0)
|
|
ret = 0;
|
|
goto bail;
|
|
}
|
|
|
|
ureg = dd->ipath_uregbase + dd->ipath_ureg_align * pd->port_port;
|
|
if (!pd->port_subport_cnt) {
|
|
/* port is not shared */
|
|
piocnt = pd->port_piocnt;
|
|
piobufs = pd->port_piobufs;
|
|
} else if (!subport_fp(fp)) {
|
|
/* caller is the master */
|
|
piocnt = (pd->port_piocnt / pd->port_subport_cnt) +
|
|
(pd->port_piocnt % pd->port_subport_cnt);
|
|
piobufs = pd->port_piobufs +
|
|
dd->ipath_palign * (pd->port_piocnt - piocnt);
|
|
} else {
|
|
unsigned slave = subport_fp(fp) - 1;
|
|
|
|
/* caller is a slave */
|
|
piocnt = pd->port_piocnt / pd->port_subport_cnt;
|
|
piobufs = pd->port_piobufs + dd->ipath_palign * piocnt * slave;
|
|
}
|
|
|
|
if (pgaddr == ureg)
|
|
ret = mmap_ureg(vma, dd, ureg);
|
|
else if (pgaddr == piobufs)
|
|
ret = mmap_piobufs(vma, dd, pd, piobufs, piocnt);
|
|
else if (pgaddr == dd->ipath_pioavailregs_phys)
|
|
/* in-memory copy of pioavail registers */
|
|
ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0,
|
|
(void *) dd->ipath_pioavailregs_dma,
|
|
"pioavail registers");
|
|
else if (pgaddr == pd->port_rcvegr_phys)
|
|
ret = mmap_rcvegrbufs(vma, pd);
|
|
else if (pgaddr == (u64) pd->port_rcvhdrq_phys)
|
|
/*
|
|
* The rcvhdrq itself; readonly except on HT (so have
|
|
* to allow writable mapping), multiple pages, contiguous
|
|
* from an i/o perspective.
|
|
*/
|
|
ret = ipath_mmap_mem(vma, pd, pd->port_rcvhdrq_size, 1,
|
|
pd->port_rcvhdrq,
|
|
"rcvhdrq");
|
|
else if (pgaddr == (u64) pd->port_rcvhdrqtailaddr_phys)
|
|
/* in-memory copy of rcvhdrq tail register */
|
|
ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0,
|
|
pd->port_rcvhdrtail_kvaddr,
|
|
"rcvhdrq tail");
|
|
else
|
|
ret = -EINVAL;
|
|
|
|
vma->vm_private_data = NULL;
|
|
|
|
if (ret < 0)
|
|
dev_info(&dd->pcidev->dev,
|
|
"Failure %d on off %llx len %lx\n",
|
|
-ret, (unsigned long long)pgaddr,
|
|
vma->vm_end - vma->vm_start);
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
static unsigned ipath_poll_hdrqfull(struct ipath_portdata *pd)
|
|
{
|
|
unsigned pollflag = 0;
|
|
|
|
if ((pd->poll_type & IPATH_POLL_TYPE_OVERFLOW) &&
|
|
pd->port_hdrqfull != pd->port_hdrqfull_poll) {
|
|
pollflag |= POLLIN | POLLRDNORM;
|
|
pd->port_hdrqfull_poll = pd->port_hdrqfull;
|
|
}
|
|
|
|
return pollflag;
|
|
}
|
|
|
|
static unsigned int ipath_poll_urgent(struct ipath_portdata *pd,
|
|
struct file *fp,
|
|
struct poll_table_struct *pt)
|
|
{
|
|
unsigned pollflag = 0;
|
|
struct ipath_devdata *dd;
|
|
|
|
dd = pd->port_dd;
|
|
|
|
/* variable access in ipath_poll_hdrqfull() needs this */
|
|
rmb();
|
|
pollflag = ipath_poll_hdrqfull(pd);
|
|
|
|
if (pd->port_urgent != pd->port_urgent_poll) {
|
|
pollflag |= POLLIN | POLLRDNORM;
|
|
pd->port_urgent_poll = pd->port_urgent;
|
|
}
|
|
|
|
if (!pollflag) {
|
|
/* this saves a spin_lock/unlock in interrupt handler... */
|
|
set_bit(IPATH_PORT_WAITING_URG, &pd->port_flag);
|
|
/* flush waiting flag so don't miss an event... */
|
|
wmb();
|
|
poll_wait(fp, &pd->port_wait, pt);
|
|
}
|
|
|
|
return pollflag;
|
|
}
|
|
|
|
static unsigned int ipath_poll_next(struct ipath_portdata *pd,
|
|
struct file *fp,
|
|
struct poll_table_struct *pt)
|
|
{
|
|
u32 head;
|
|
u32 tail;
|
|
unsigned pollflag = 0;
|
|
struct ipath_devdata *dd;
|
|
|
|
dd = pd->port_dd;
|
|
|
|
/* variable access in ipath_poll_hdrqfull() needs this */
|
|
rmb();
|
|
pollflag = ipath_poll_hdrqfull(pd);
|
|
|
|
head = ipath_read_ureg32(dd, ur_rcvhdrhead, pd->port_port);
|
|
if (pd->port_rcvhdrtail_kvaddr)
|
|
tail = ipath_get_rcvhdrtail(pd);
|
|
else
|
|
tail = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port);
|
|
|
|
if (head != tail)
|
|
pollflag |= POLLIN | POLLRDNORM;
|
|
else {
|
|
/* this saves a spin_lock/unlock in interrupt handler */
|
|
set_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag);
|
|
/* flush waiting flag so we don't miss an event */
|
|
wmb();
|
|
|
|
set_bit(pd->port_port + dd->ipath_r_intravail_shift,
|
|
&dd->ipath_rcvctrl);
|
|
|
|
ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
|
|
dd->ipath_rcvctrl);
|
|
|
|
if (dd->ipath_rhdrhead_intr_off) /* arm rcv interrupt */
|
|
ipath_write_ureg(dd, ur_rcvhdrhead,
|
|
dd->ipath_rhdrhead_intr_off | head,
|
|
pd->port_port);
|
|
|
|
poll_wait(fp, &pd->port_wait, pt);
|
|
}
|
|
|
|
return pollflag;
|
|
}
|
|
|
|
static unsigned int ipath_poll(struct file *fp,
|
|
struct poll_table_struct *pt)
|
|
{
|
|
struct ipath_portdata *pd;
|
|
unsigned pollflag;
|
|
|
|
pd = port_fp(fp);
|
|
if (!pd)
|
|
pollflag = 0;
|
|
else if (pd->poll_type & IPATH_POLL_TYPE_URGENT)
|
|
pollflag = ipath_poll_urgent(pd, fp, pt);
|
|
else
|
|
pollflag = ipath_poll_next(pd, fp, pt);
|
|
|
|
return pollflag;
|
|
}
|
|
|
|
static int ipath_supports_subports(int user_swmajor, int user_swminor)
|
|
{
|
|
/* no subport implementation prior to software version 1.3 */
|
|
return (user_swmajor > 1) || (user_swminor >= 3);
|
|
}
|
|
|
|
static int ipath_compatible_subports(int user_swmajor, int user_swminor)
|
|
{
|
|
/* this code is written long-hand for clarity */
|
|
if (IPATH_USER_SWMAJOR != user_swmajor) {
|
|
/* no promise of compatibility if major mismatch */
|
|
return 0;
|
|
}
|
|
if (IPATH_USER_SWMAJOR == 1) {
|
|
switch (IPATH_USER_SWMINOR) {
|
|
case 0:
|
|
case 1:
|
|
case 2:
|
|
/* no subport implementation so cannot be compatible */
|
|
return 0;
|
|
case 3:
|
|
/* 3 is only compatible with itself */
|
|
return user_swminor == 3;
|
|
default:
|
|
/* >= 4 are compatible (or are expected to be) */
|
|
return user_swminor >= 4;
|
|
}
|
|
}
|
|
/* make no promises yet for future major versions */
|
|
return 0;
|
|
}
|
|
|
|
static int init_subports(struct ipath_devdata *dd,
|
|
struct ipath_portdata *pd,
|
|
const struct ipath_user_info *uinfo)
|
|
{
|
|
int ret = 0;
|
|
unsigned num_subports;
|
|
size_t size;
|
|
|
|
/*
|
|
* If the user is requesting zero subports,
|
|
* skip the subport allocation.
|
|
*/
|
|
if (uinfo->spu_subport_cnt <= 0)
|
|
goto bail;
|
|
|
|
/* Self-consistency check for ipath_compatible_subports() */
|
|
if (ipath_supports_subports(IPATH_USER_SWMAJOR, IPATH_USER_SWMINOR) &&
|
|
!ipath_compatible_subports(IPATH_USER_SWMAJOR,
|
|
IPATH_USER_SWMINOR)) {
|
|
dev_info(&dd->pcidev->dev,
|
|
"Inconsistent ipath_compatible_subports()\n");
|
|
goto bail;
|
|
}
|
|
|
|
/* Check for subport compatibility */
|
|
if (!ipath_compatible_subports(uinfo->spu_userversion >> 16,
|
|
uinfo->spu_userversion & 0xffff)) {
|
|
dev_info(&dd->pcidev->dev,
|
|
"Mismatched user version (%d.%d) and driver "
|
|
"version (%d.%d) while port sharing. Ensure "
|
|
"that driver and library are from the same "
|
|
"release.\n",
|
|
(int) (uinfo->spu_userversion >> 16),
|
|
(int) (uinfo->spu_userversion & 0xffff),
|
|
IPATH_USER_SWMAJOR,
|
|
IPATH_USER_SWMINOR);
|
|
goto bail;
|
|
}
|
|
if (uinfo->spu_subport_cnt > INFINIPATH_MAX_SUBPORT) {
|
|
ret = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
num_subports = uinfo->spu_subport_cnt;
|
|
pd->subport_uregbase = vmalloc(PAGE_SIZE * num_subports);
|
|
if (!pd->subport_uregbase) {
|
|
ret = -ENOMEM;
|
|
goto bail;
|
|
}
|
|
/* Note: pd->port_rcvhdrq_size isn't initialized yet. */
|
|
size = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize *
|
|
sizeof(u32), PAGE_SIZE) * num_subports;
|
|
pd->subport_rcvhdr_base = vmalloc(size);
|
|
if (!pd->subport_rcvhdr_base) {
|
|
ret = -ENOMEM;
|
|
goto bail_ureg;
|
|
}
|
|
|
|
pd->subport_rcvegrbuf = vmalloc(pd->port_rcvegrbuf_chunks *
|
|
pd->port_rcvegrbuf_size *
|
|
num_subports);
|
|
if (!pd->subport_rcvegrbuf) {
|
|
ret = -ENOMEM;
|
|
goto bail_rhdr;
|
|
}
|
|
|
|
pd->port_subport_cnt = uinfo->spu_subport_cnt;
|
|
pd->port_subport_id = uinfo->spu_subport_id;
|
|
pd->active_slaves = 1;
|
|
set_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag);
|
|
memset(pd->subport_uregbase, 0, PAGE_SIZE * num_subports);
|
|
memset(pd->subport_rcvhdr_base, 0, size);
|
|
memset(pd->subport_rcvegrbuf, 0, pd->port_rcvegrbuf_chunks *
|
|
pd->port_rcvegrbuf_size *
|
|
num_subports);
|
|
goto bail;
|
|
|
|
bail_rhdr:
|
|
vfree(pd->subport_rcvhdr_base);
|
|
bail_ureg:
|
|
vfree(pd->subport_uregbase);
|
|
pd->subport_uregbase = NULL;
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
static int try_alloc_port(struct ipath_devdata *dd, int port,
|
|
struct file *fp,
|
|
const struct ipath_user_info *uinfo)
|
|
{
|
|
struct ipath_portdata *pd;
|
|
int ret;
|
|
|
|
if (!(pd = dd->ipath_pd[port])) {
|
|
void *ptmp;
|
|
|
|
pd = kzalloc(sizeof(struct ipath_portdata), GFP_KERNEL);
|
|
|
|
/*
|
|
* Allocate memory for use in ipath_tid_update() just once
|
|
* at open, not per call. Reduces cost of expected send
|
|
* setup.
|
|
*/
|
|
ptmp = kmalloc(dd->ipath_rcvtidcnt * sizeof(u16) +
|
|
dd->ipath_rcvtidcnt * sizeof(struct page **),
|
|
GFP_KERNEL);
|
|
if (!pd || !ptmp) {
|
|
ipath_dev_err(dd, "Unable to allocate portdata "
|
|
"memory, failing open\n");
|
|
ret = -ENOMEM;
|
|
kfree(pd);
|
|
kfree(ptmp);
|
|
goto bail;
|
|
}
|
|
dd->ipath_pd[port] = pd;
|
|
dd->ipath_pd[port]->port_port = port;
|
|
dd->ipath_pd[port]->port_dd = dd;
|
|
dd->ipath_pd[port]->port_tid_pg_list = ptmp;
|
|
init_waitqueue_head(&dd->ipath_pd[port]->port_wait);
|
|
}
|
|
if (!pd->port_cnt) {
|
|
pd->userversion = uinfo->spu_userversion;
|
|
init_user_egr_sizes(pd);
|
|
if ((ret = init_subports(dd, pd, uinfo)) != 0)
|
|
goto bail;
|
|
ipath_cdbg(PROC, "%s[%u] opened unit:port %u:%u\n",
|
|
current->comm, current->pid, dd->ipath_unit,
|
|
port);
|
|
pd->port_cnt = 1;
|
|
port_fp(fp) = pd;
|
|
pd->port_pid = get_pid(task_pid(current));
|
|
strlcpy(pd->port_comm, current->comm, sizeof(pd->port_comm));
|
|
ipath_stats.sps_ports++;
|
|
ret = 0;
|
|
} else
|
|
ret = -EBUSY;
|
|
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
static inline int usable(struct ipath_devdata *dd)
|
|
{
|
|
return dd &&
|
|
(dd->ipath_flags & IPATH_PRESENT) &&
|
|
dd->ipath_kregbase &&
|
|
dd->ipath_lid &&
|
|
!(dd->ipath_flags & (IPATH_LINKDOWN | IPATH_DISABLED
|
|
| IPATH_LINKUNK));
|
|
}
|
|
|
|
static int find_free_port(int unit, struct file *fp,
|
|
const struct ipath_user_info *uinfo)
|
|
{
|
|
struct ipath_devdata *dd = ipath_lookup(unit);
|
|
int ret, i;
|
|
|
|
if (!dd) {
|
|
ret = -ENODEV;
|
|
goto bail;
|
|
}
|
|
|
|
if (!usable(dd)) {
|
|
ret = -ENETDOWN;
|
|
goto bail;
|
|
}
|
|
|
|
for (i = 1; i < dd->ipath_cfgports; i++) {
|
|
ret = try_alloc_port(dd, i, fp, uinfo);
|
|
if (ret != -EBUSY)
|
|
goto bail;
|
|
}
|
|
ret = -EBUSY;
|
|
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
static int find_best_unit(struct file *fp,
|
|
const struct ipath_user_info *uinfo)
|
|
{
|
|
int ret = 0, i, prefunit = -1, devmax;
|
|
int maxofallports, npresent, nup;
|
|
int ndev;
|
|
|
|
devmax = ipath_count_units(&npresent, &nup, &maxofallports);
|
|
|
|
/*
|
|
* This code is present to allow a knowledgeable person to
|
|
* specify the layout of processes to processors before opening
|
|
* this driver, and then we'll assign the process to the "closest"
|
|
* InfiniPath chip to that processor (we assume reasonable connectivity,
|
|
* for now). This code assumes that if affinity has been set
|
|
* before this point, that at most one cpu is set; for now this
|
|
* is reasonable. I check for both cpumask_empty() and cpumask_full(),
|
|
* in case some kernel variant sets none of the bits when no
|
|
* affinity is set. 2.6.11 and 12 kernels have all present
|
|
* cpus set. Some day we'll have to fix it up further to handle
|
|
* a cpu subset. This algorithm fails for two HT chips connected
|
|
* in tunnel fashion. Eventually this needs real topology
|
|
* information. There may be some issues with dual core numbering
|
|
* as well. This needs more work prior to release.
|
|
*/
|
|
if (!cpumask_empty(¤t->cpus_allowed) &&
|
|
!cpumask_full(¤t->cpus_allowed)) {
|
|
int ncpus = num_online_cpus(), curcpu = -1, nset = 0;
|
|
for (i = 0; i < ncpus; i++)
|
|
if (cpumask_test_cpu(i, ¤t->cpus_allowed)) {
|
|
ipath_cdbg(PROC, "%s[%u] affinity set for "
|
|
"cpu %d/%d\n", current->comm,
|
|
current->pid, i, ncpus);
|
|
curcpu = i;
|
|
nset++;
|
|
}
|
|
if (curcpu != -1 && nset != ncpus) {
|
|
if (npresent) {
|
|
prefunit = curcpu / (ncpus / npresent);
|
|
ipath_cdbg(PROC,"%s[%u] %d chips, %d cpus, "
|
|
"%d cpus/chip, select unit %d\n",
|
|
current->comm, current->pid,
|
|
npresent, ncpus, ncpus / npresent,
|
|
prefunit);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* user ports start at 1, kernel port is 0
|
|
* For now, we do round-robin access across all chips
|
|
*/
|
|
|
|
if (prefunit != -1)
|
|
devmax = prefunit + 1;
|
|
recheck:
|
|
for (i = 1; i < maxofallports; i++) {
|
|
for (ndev = prefunit != -1 ? prefunit : 0; ndev < devmax;
|
|
ndev++) {
|
|
struct ipath_devdata *dd = ipath_lookup(ndev);
|
|
|
|
if (!usable(dd))
|
|
continue; /* can't use this unit */
|
|
if (i >= dd->ipath_cfgports)
|
|
/*
|
|
* Maxed out on users of this unit. Try
|
|
* next.
|
|
*/
|
|
continue;
|
|
ret = try_alloc_port(dd, i, fp, uinfo);
|
|
if (!ret)
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
if (npresent) {
|
|
if (nup == 0) {
|
|
ret = -ENETDOWN;
|
|
ipath_dbg("No ports available (none initialized "
|
|
"and ready)\n");
|
|
} else {
|
|
if (prefunit > 0) {
|
|
/* if started above 0, retry from 0 */
|
|
ipath_cdbg(PROC,
|
|
"%s[%u] no ports on prefunit "
|
|
"%d, clear and re-check\n",
|
|
current->comm, current->pid,
|
|
prefunit);
|
|
devmax = ipath_count_units(NULL, NULL,
|
|
NULL);
|
|
prefunit = -1;
|
|
goto recheck;
|
|
}
|
|
ret = -EBUSY;
|
|
ipath_dbg("No ports available\n");
|
|
}
|
|
} else {
|
|
ret = -ENXIO;
|
|
ipath_dbg("No boards found\n");
|
|
}
|
|
|
|
done:
|
|
return ret;
|
|
}
|
|
|
|
static int find_shared_port(struct file *fp,
|
|
const struct ipath_user_info *uinfo)
|
|
{
|
|
int devmax, ndev, i;
|
|
int ret = 0;
|
|
|
|
devmax = ipath_count_units(NULL, NULL, NULL);
|
|
|
|
for (ndev = 0; ndev < devmax; ndev++) {
|
|
struct ipath_devdata *dd = ipath_lookup(ndev);
|
|
|
|
if (!usable(dd))
|
|
continue;
|
|
for (i = 1; i < dd->ipath_cfgports; i++) {
|
|
struct ipath_portdata *pd = dd->ipath_pd[i];
|
|
|
|
/* Skip ports which are not yet open */
|
|
if (!pd || !pd->port_cnt)
|
|
continue;
|
|
/* Skip port if it doesn't match the requested one */
|
|
if (pd->port_subport_id != uinfo->spu_subport_id)
|
|
continue;
|
|
/* Verify the sharing process matches the master */
|
|
if (pd->port_subport_cnt != uinfo->spu_subport_cnt ||
|
|
pd->userversion != uinfo->spu_userversion ||
|
|
pd->port_cnt >= pd->port_subport_cnt) {
|
|
ret = -EINVAL;
|
|
goto done;
|
|
}
|
|
port_fp(fp) = pd;
|
|
subport_fp(fp) = pd->port_cnt++;
|
|
pd->port_subpid[subport_fp(fp)] =
|
|
get_pid(task_pid(current));
|
|
tidcursor_fp(fp) = 0;
|
|
pd->active_slaves |= 1 << subport_fp(fp);
|
|
ipath_cdbg(PROC,
|
|
"%s[%u] %u sharing %s[%u] unit:port %u:%u\n",
|
|
current->comm, current->pid,
|
|
subport_fp(fp),
|
|
pd->port_comm, pid_nr(pd->port_pid),
|
|
dd->ipath_unit, pd->port_port);
|
|
ret = 1;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
done:
|
|
return ret;
|
|
}
|
|
|
|
static int ipath_open(struct inode *in, struct file *fp)
|
|
{
|
|
/* The real work is performed later in ipath_assign_port() */
|
|
fp->private_data = kzalloc(sizeof(struct ipath_filedata), GFP_KERNEL);
|
|
return fp->private_data ? 0 : -ENOMEM;
|
|
}
|
|
|
|
/* Get port early, so can set affinity prior to memory allocation */
|
|
static int ipath_assign_port(struct file *fp,
|
|
const struct ipath_user_info *uinfo)
|
|
{
|
|
int ret;
|
|
int i_minor;
|
|
unsigned swmajor, swminor;
|
|
|
|
/* Check to be sure we haven't already initialized this file */
|
|
if (port_fp(fp)) {
|
|
ret = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
/* for now, if major version is different, bail */
|
|
swmajor = uinfo->spu_userversion >> 16;
|
|
if (swmajor != IPATH_USER_SWMAJOR) {
|
|
ipath_dbg("User major version %d not same as driver "
|
|
"major %d\n", uinfo->spu_userversion >> 16,
|
|
IPATH_USER_SWMAJOR);
|
|
ret = -ENODEV;
|
|
goto done;
|
|
}
|
|
|
|
swminor = uinfo->spu_userversion & 0xffff;
|
|
if (swminor != IPATH_USER_SWMINOR)
|
|
ipath_dbg("User minor version %d not same as driver "
|
|
"minor %d\n", swminor, IPATH_USER_SWMINOR);
|
|
|
|
mutex_lock(&ipath_mutex);
|
|
|
|
if (ipath_compatible_subports(swmajor, swminor) &&
|
|
uinfo->spu_subport_cnt &&
|
|
(ret = find_shared_port(fp, uinfo))) {
|
|
if (ret > 0)
|
|
ret = 0;
|
|
goto done_chk_sdma;
|
|
}
|
|
|
|
i_minor = iminor(fp->f_path.dentry->d_inode) - IPATH_USER_MINOR_BASE;
|
|
ipath_cdbg(VERBOSE, "open on dev %lx (minor %d)\n",
|
|
(long)fp->f_path.dentry->d_inode->i_rdev, i_minor);
|
|
|
|
if (i_minor)
|
|
ret = find_free_port(i_minor - 1, fp, uinfo);
|
|
else
|
|
ret = find_best_unit(fp, uinfo);
|
|
|
|
done_chk_sdma:
|
|
if (!ret) {
|
|
struct ipath_filedata *fd = fp->private_data;
|
|
const struct ipath_portdata *pd = fd->pd;
|
|
const struct ipath_devdata *dd = pd->port_dd;
|
|
|
|
fd->pq = ipath_user_sdma_queue_create(&dd->pcidev->dev,
|
|
dd->ipath_unit,
|
|
pd->port_port,
|
|
fd->subport);
|
|
|
|
if (!fd->pq)
|
|
ret = -ENOMEM;
|
|
}
|
|
|
|
mutex_unlock(&ipath_mutex);
|
|
|
|
done:
|
|
return ret;
|
|
}
|
|
|
|
|
|
static int ipath_do_user_init(struct file *fp,
|
|
const struct ipath_user_info *uinfo)
|
|
{
|
|
int ret;
|
|
struct ipath_portdata *pd = port_fp(fp);
|
|
struct ipath_devdata *dd;
|
|
u32 head32;
|
|
|
|
/* Subports don't need to initialize anything since master did it. */
|
|
if (subport_fp(fp)) {
|
|
ret = wait_event_interruptible(pd->port_wait,
|
|
!test_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag));
|
|
goto done;
|
|
}
|
|
|
|
dd = pd->port_dd;
|
|
|
|
if (uinfo->spu_rcvhdrsize) {
|
|
ret = ipath_setrcvhdrsize(dd, uinfo->spu_rcvhdrsize);
|
|
if (ret)
|
|
goto done;
|
|
}
|
|
|
|
/* for now we do nothing with rcvhdrcnt: uinfo->spu_rcvhdrcnt */
|
|
|
|
/* some ports may get extra buffers, calculate that here */
|
|
if (pd->port_port <= dd->ipath_ports_extrabuf)
|
|
pd->port_piocnt = dd->ipath_pbufsport + 1;
|
|
else
|
|
pd->port_piocnt = dd->ipath_pbufsport;
|
|
|
|
/* for right now, kernel piobufs are at end, so port 1 is at 0 */
|
|
if (pd->port_port <= dd->ipath_ports_extrabuf)
|
|
pd->port_pio_base = (dd->ipath_pbufsport + 1)
|
|
* (pd->port_port - 1);
|
|
else
|
|
pd->port_pio_base = dd->ipath_ports_extrabuf +
|
|
dd->ipath_pbufsport * (pd->port_port - 1);
|
|
pd->port_piobufs = dd->ipath_piobufbase +
|
|
pd->port_pio_base * dd->ipath_palign;
|
|
ipath_cdbg(VERBOSE, "piobuf base for port %u is 0x%x, piocnt %u,"
|
|
" first pio %u\n", pd->port_port, pd->port_piobufs,
|
|
pd->port_piocnt, pd->port_pio_base);
|
|
ipath_chg_pioavailkernel(dd, pd->port_pio_base, pd->port_piocnt, 0);
|
|
|
|
/*
|
|
* Now allocate the rcvhdr Q and eager TIDs; skip the TID
|
|
* array for time being. If pd->port_port > chip-supported,
|
|
* we need to do extra stuff here to handle by handling overflow
|
|
* through port 0, someday
|
|
*/
|
|
ret = ipath_create_rcvhdrq(dd, pd);
|
|
if (!ret)
|
|
ret = ipath_create_user_egr(pd);
|
|
if (ret)
|
|
goto done;
|
|
|
|
/*
|
|
* set the eager head register for this port to the current values
|
|
* of the tail pointers, since we don't know if they were
|
|
* updated on last use of the port.
|
|
*/
|
|
head32 = ipath_read_ureg32(dd, ur_rcvegrindextail, pd->port_port);
|
|
ipath_write_ureg(dd, ur_rcvegrindexhead, head32, pd->port_port);
|
|
pd->port_lastrcvhdrqtail = -1;
|
|
ipath_cdbg(VERBOSE, "Wrote port%d egrhead %x from tail regs\n",
|
|
pd->port_port, head32);
|
|
pd->port_tidcursor = 0; /* start at beginning after open */
|
|
|
|
/* initialize poll variables... */
|
|
pd->port_urgent = 0;
|
|
pd->port_urgent_poll = 0;
|
|
pd->port_hdrqfull_poll = pd->port_hdrqfull;
|
|
|
|
/*
|
|
* Now enable the port for receive.
|
|
* For chips that are set to DMA the tail register to memory
|
|
* when they change (and when the update bit transitions from
|
|
* 0 to 1. So for those chips, we turn it off and then back on.
|
|
* This will (very briefly) affect any other open ports, but the
|
|
* duration is very short, and therefore isn't an issue. We
|
|
* explictly set the in-memory tail copy to 0 beforehand, so we
|
|
* don't have to wait to be sure the DMA update has happened
|
|
* (chip resets head/tail to 0 on transition to enable).
|
|
*/
|
|
set_bit(dd->ipath_r_portenable_shift + pd->port_port,
|
|
&dd->ipath_rcvctrl);
|
|
if (!(dd->ipath_flags & IPATH_NODMA_RTAIL)) {
|
|
if (pd->port_rcvhdrtail_kvaddr)
|
|
ipath_clear_rcvhdrtail(pd);
|
|
ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
|
|
dd->ipath_rcvctrl &
|
|
~(1ULL << dd->ipath_r_tailupd_shift));
|
|
}
|
|
ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
|
|
dd->ipath_rcvctrl);
|
|
/* Notify any waiting slaves */
|
|
if (pd->port_subport_cnt) {
|
|
clear_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag);
|
|
wake_up(&pd->port_wait);
|
|
}
|
|
done:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* unlock_exptid - unlock any expected TID entries port still had in use
|
|
* @pd: port
|
|
*
|
|
* We don't actually update the chip here, because we do a bulk update
|
|
* below, using ipath_f_clear_tids.
|
|
*/
|
|
static void unlock_expected_tids(struct ipath_portdata *pd)
|
|
{
|
|
struct ipath_devdata *dd = pd->port_dd;
|
|
int port_tidbase = pd->port_port * dd->ipath_rcvtidcnt;
|
|
int i, cnt = 0, maxtid = port_tidbase + dd->ipath_rcvtidcnt;
|
|
|
|
ipath_cdbg(VERBOSE, "Port %u unlocking any locked expTID pages\n",
|
|
pd->port_port);
|
|
for (i = port_tidbase; i < maxtid; i++) {
|
|
struct page *ps = dd->ipath_pageshadow[i];
|
|
|
|
if (!ps)
|
|
continue;
|
|
|
|
dd->ipath_pageshadow[i] = NULL;
|
|
pci_unmap_page(dd->pcidev, dd->ipath_physshadow[i],
|
|
PAGE_SIZE, PCI_DMA_FROMDEVICE);
|
|
ipath_release_user_pages_on_close(&ps, 1);
|
|
cnt++;
|
|
ipath_stats.sps_pageunlocks++;
|
|
}
|
|
if (cnt)
|
|
ipath_cdbg(VERBOSE, "Port %u locked %u expTID entries\n",
|
|
pd->port_port, cnt);
|
|
|
|
if (ipath_stats.sps_pagelocks || ipath_stats.sps_pageunlocks)
|
|
ipath_cdbg(VERBOSE, "%llu pages locked, %llu unlocked\n",
|
|
(unsigned long long) ipath_stats.sps_pagelocks,
|
|
(unsigned long long)
|
|
ipath_stats.sps_pageunlocks);
|
|
}
|
|
|
|
static int ipath_close(struct inode *in, struct file *fp)
|
|
{
|
|
int ret = 0;
|
|
struct ipath_filedata *fd;
|
|
struct ipath_portdata *pd;
|
|
struct ipath_devdata *dd;
|
|
unsigned long flags;
|
|
unsigned port;
|
|
struct pid *pid;
|
|
|
|
ipath_cdbg(VERBOSE, "close on dev %lx, private data %p\n",
|
|
(long)in->i_rdev, fp->private_data);
|
|
|
|
mutex_lock(&ipath_mutex);
|
|
|
|
fd = fp->private_data;
|
|
fp->private_data = NULL;
|
|
pd = fd->pd;
|
|
if (!pd) {
|
|
mutex_unlock(&ipath_mutex);
|
|
goto bail;
|
|
}
|
|
|
|
dd = pd->port_dd;
|
|
|
|
/* drain user sdma queue */
|
|
ipath_user_sdma_queue_drain(dd, fd->pq);
|
|
ipath_user_sdma_queue_destroy(fd->pq);
|
|
|
|
if (--pd->port_cnt) {
|
|
/*
|
|
* XXX If the master closes the port before the slave(s),
|
|
* revoke the mmap for the eager receive queue so
|
|
* the slave(s) don't wait for receive data forever.
|
|
*/
|
|
pd->active_slaves &= ~(1 << fd->subport);
|
|
put_pid(pd->port_subpid[fd->subport]);
|
|
pd->port_subpid[fd->subport] = NULL;
|
|
mutex_unlock(&ipath_mutex);
|
|
goto bail;
|
|
}
|
|
/* early; no interrupt users after this */
|
|
spin_lock_irqsave(&dd->ipath_uctxt_lock, flags);
|
|
port = pd->port_port;
|
|
dd->ipath_pd[port] = NULL;
|
|
pid = pd->port_pid;
|
|
pd->port_pid = NULL;
|
|
spin_unlock_irqrestore(&dd->ipath_uctxt_lock, flags);
|
|
|
|
if (pd->port_rcvwait_to || pd->port_piowait_to
|
|
|| pd->port_rcvnowait || pd->port_pionowait) {
|
|
ipath_cdbg(VERBOSE, "port%u, %u rcv, %u pio wait timeo; "
|
|
"%u rcv %u, pio already\n",
|
|
pd->port_port, pd->port_rcvwait_to,
|
|
pd->port_piowait_to, pd->port_rcvnowait,
|
|
pd->port_pionowait);
|
|
pd->port_rcvwait_to = pd->port_piowait_to =
|
|
pd->port_rcvnowait = pd->port_pionowait = 0;
|
|
}
|
|
if (pd->port_flag) {
|
|
ipath_cdbg(PROC, "port %u port_flag set: 0x%lx\n",
|
|
pd->port_port, pd->port_flag);
|
|
pd->port_flag = 0;
|
|
}
|
|
|
|
if (dd->ipath_kregbase) {
|
|
/* atomically clear receive enable port and intr avail. */
|
|
clear_bit(dd->ipath_r_portenable_shift + port,
|
|
&dd->ipath_rcvctrl);
|
|
clear_bit(pd->port_port + dd->ipath_r_intravail_shift,
|
|
&dd->ipath_rcvctrl);
|
|
ipath_write_kreg( dd, dd->ipath_kregs->kr_rcvctrl,
|
|
dd->ipath_rcvctrl);
|
|
/* and read back from chip to be sure that nothing
|
|
* else is in flight when we do the rest */
|
|
(void)ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
|
|
|
|
/* clean up the pkeys for this port user */
|
|
ipath_clean_part_key(pd, dd);
|
|
/*
|
|
* be paranoid, and never write 0's to these, just use an
|
|
* unused part of the port 0 tail page. Of course,
|
|
* rcvhdraddr points to a large chunk of memory, so this
|
|
* could still trash things, but at least it won't trash
|
|
* page 0, and by disabling the port, it should stop "soon",
|
|
* even if a packet or two is in already in flight after we
|
|
* disabled the port.
|
|
*/
|
|
ipath_write_kreg_port(dd,
|
|
dd->ipath_kregs->kr_rcvhdrtailaddr, port,
|
|
dd->ipath_dummy_hdrq_phys);
|
|
ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdraddr,
|
|
pd->port_port, dd->ipath_dummy_hdrq_phys);
|
|
|
|
ipath_disarm_piobufs(dd, pd->port_pio_base, pd->port_piocnt);
|
|
ipath_chg_pioavailkernel(dd, pd->port_pio_base,
|
|
pd->port_piocnt, 1);
|
|
|
|
dd->ipath_f_clear_tids(dd, pd->port_port);
|
|
|
|
if (dd->ipath_pageshadow)
|
|
unlock_expected_tids(pd);
|
|
ipath_stats.sps_ports--;
|
|
ipath_cdbg(PROC, "%s[%u] closed port %u:%u\n",
|
|
pd->port_comm, pid_nr(pid),
|
|
dd->ipath_unit, port);
|
|
}
|
|
|
|
put_pid(pid);
|
|
mutex_unlock(&ipath_mutex);
|
|
ipath_free_pddata(dd, pd); /* after releasing the mutex */
|
|
|
|
bail:
|
|
kfree(fd);
|
|
return ret;
|
|
}
|
|
|
|
static int ipath_port_info(struct ipath_portdata *pd, u16 subport,
|
|
struct ipath_port_info __user *uinfo)
|
|
{
|
|
struct ipath_port_info info;
|
|
int nup;
|
|
int ret;
|
|
size_t sz;
|
|
|
|
(void) ipath_count_units(NULL, &nup, NULL);
|
|
info.num_active = nup;
|
|
info.unit = pd->port_dd->ipath_unit;
|
|
info.port = pd->port_port;
|
|
info.subport = subport;
|
|
/* Don't return new fields if old library opened the port. */
|
|
if (ipath_supports_subports(pd->userversion >> 16,
|
|
pd->userversion & 0xffff)) {
|
|
/* Number of user ports available for this device. */
|
|
info.num_ports = pd->port_dd->ipath_cfgports - 1;
|
|
info.num_subports = pd->port_subport_cnt;
|
|
sz = sizeof(info);
|
|
} else
|
|
sz = sizeof(info) - 2 * sizeof(u16);
|
|
|
|
if (copy_to_user(uinfo, &info, sz)) {
|
|
ret = -EFAULT;
|
|
goto bail;
|
|
}
|
|
ret = 0;
|
|
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
static int ipath_get_slave_info(struct ipath_portdata *pd,
|
|
void __user *slave_mask_addr)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (copy_to_user(slave_mask_addr, &pd->active_slaves, sizeof(u32)))
|
|
ret = -EFAULT;
|
|
return ret;
|
|
}
|
|
|
|
static int ipath_sdma_get_inflight(struct ipath_user_sdma_queue *pq,
|
|
u32 __user *inflightp)
|
|
{
|
|
const u32 val = ipath_user_sdma_inflight_counter(pq);
|
|
|
|
if (put_user(val, inflightp))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ipath_sdma_get_complete(struct ipath_devdata *dd,
|
|
struct ipath_user_sdma_queue *pq,
|
|
u32 __user *completep)
|
|
{
|
|
u32 val;
|
|
int err;
|
|
|
|
err = ipath_user_sdma_make_progress(dd, pq);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
val = ipath_user_sdma_complete_counter(pq);
|
|
if (put_user(val, completep))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t ipath_write(struct file *fp, const char __user *data,
|
|
size_t count, loff_t *off)
|
|
{
|
|
const struct ipath_cmd __user *ucmd;
|
|
struct ipath_portdata *pd;
|
|
const void __user *src;
|
|
size_t consumed, copy;
|
|
struct ipath_cmd cmd;
|
|
ssize_t ret = 0;
|
|
void *dest;
|
|
|
|
if (count < sizeof(cmd.type)) {
|
|
ret = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
ucmd = (const struct ipath_cmd __user *) data;
|
|
|
|
if (copy_from_user(&cmd.type, &ucmd->type, sizeof(cmd.type))) {
|
|
ret = -EFAULT;
|
|
goto bail;
|
|
}
|
|
|
|
consumed = sizeof(cmd.type);
|
|
|
|
switch (cmd.type) {
|
|
case IPATH_CMD_ASSIGN_PORT:
|
|
case __IPATH_CMD_USER_INIT:
|
|
case IPATH_CMD_USER_INIT:
|
|
copy = sizeof(cmd.cmd.user_info);
|
|
dest = &cmd.cmd.user_info;
|
|
src = &ucmd->cmd.user_info;
|
|
break;
|
|
case IPATH_CMD_RECV_CTRL:
|
|
copy = sizeof(cmd.cmd.recv_ctrl);
|
|
dest = &cmd.cmd.recv_ctrl;
|
|
src = &ucmd->cmd.recv_ctrl;
|
|
break;
|
|
case IPATH_CMD_PORT_INFO:
|
|
copy = sizeof(cmd.cmd.port_info);
|
|
dest = &cmd.cmd.port_info;
|
|
src = &ucmd->cmd.port_info;
|
|
break;
|
|
case IPATH_CMD_TID_UPDATE:
|
|
case IPATH_CMD_TID_FREE:
|
|
copy = sizeof(cmd.cmd.tid_info);
|
|
dest = &cmd.cmd.tid_info;
|
|
src = &ucmd->cmd.tid_info;
|
|
break;
|
|
case IPATH_CMD_SET_PART_KEY:
|
|
copy = sizeof(cmd.cmd.part_key);
|
|
dest = &cmd.cmd.part_key;
|
|
src = &ucmd->cmd.part_key;
|
|
break;
|
|
case __IPATH_CMD_SLAVE_INFO:
|
|
copy = sizeof(cmd.cmd.slave_mask_addr);
|
|
dest = &cmd.cmd.slave_mask_addr;
|
|
src = &ucmd->cmd.slave_mask_addr;
|
|
break;
|
|
case IPATH_CMD_PIOAVAILUPD: // force an update of PIOAvail reg
|
|
copy = 0;
|
|
src = NULL;
|
|
dest = NULL;
|
|
break;
|
|
case IPATH_CMD_POLL_TYPE:
|
|
copy = sizeof(cmd.cmd.poll_type);
|
|
dest = &cmd.cmd.poll_type;
|
|
src = &ucmd->cmd.poll_type;
|
|
break;
|
|
case IPATH_CMD_ARMLAUNCH_CTRL:
|
|
copy = sizeof(cmd.cmd.armlaunch_ctrl);
|
|
dest = &cmd.cmd.armlaunch_ctrl;
|
|
src = &ucmd->cmd.armlaunch_ctrl;
|
|
break;
|
|
case IPATH_CMD_SDMA_INFLIGHT:
|
|
copy = sizeof(cmd.cmd.sdma_inflight);
|
|
dest = &cmd.cmd.sdma_inflight;
|
|
src = &ucmd->cmd.sdma_inflight;
|
|
break;
|
|
case IPATH_CMD_SDMA_COMPLETE:
|
|
copy = sizeof(cmd.cmd.sdma_complete);
|
|
dest = &cmd.cmd.sdma_complete;
|
|
src = &ucmd->cmd.sdma_complete;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
if (copy) {
|
|
if ((count - consumed) < copy) {
|
|
ret = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
if (copy_from_user(dest, src, copy)) {
|
|
ret = -EFAULT;
|
|
goto bail;
|
|
}
|
|
|
|
consumed += copy;
|
|
}
|
|
|
|
pd = port_fp(fp);
|
|
if (!pd && cmd.type != __IPATH_CMD_USER_INIT &&
|
|
cmd.type != IPATH_CMD_ASSIGN_PORT) {
|
|
ret = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
switch (cmd.type) {
|
|
case IPATH_CMD_ASSIGN_PORT:
|
|
ret = ipath_assign_port(fp, &cmd.cmd.user_info);
|
|
if (ret)
|
|
goto bail;
|
|
break;
|
|
case __IPATH_CMD_USER_INIT:
|
|
/* backwards compatibility, get port first */
|
|
ret = ipath_assign_port(fp, &cmd.cmd.user_info);
|
|
if (ret)
|
|
goto bail;
|
|
/* and fall through to current version. */
|
|
case IPATH_CMD_USER_INIT:
|
|
ret = ipath_do_user_init(fp, &cmd.cmd.user_info);
|
|
if (ret)
|
|
goto bail;
|
|
ret = ipath_get_base_info(
|
|
fp, (void __user *) (unsigned long)
|
|
cmd.cmd.user_info.spu_base_info,
|
|
cmd.cmd.user_info.spu_base_info_size);
|
|
break;
|
|
case IPATH_CMD_RECV_CTRL:
|
|
ret = ipath_manage_rcvq(pd, subport_fp(fp), cmd.cmd.recv_ctrl);
|
|
break;
|
|
case IPATH_CMD_PORT_INFO:
|
|
ret = ipath_port_info(pd, subport_fp(fp),
|
|
(struct ipath_port_info __user *)
|
|
(unsigned long) cmd.cmd.port_info);
|
|
break;
|
|
case IPATH_CMD_TID_UPDATE:
|
|
ret = ipath_tid_update(pd, fp, &cmd.cmd.tid_info);
|
|
break;
|
|
case IPATH_CMD_TID_FREE:
|
|
ret = ipath_tid_free(pd, subport_fp(fp), &cmd.cmd.tid_info);
|
|
break;
|
|
case IPATH_CMD_SET_PART_KEY:
|
|
ret = ipath_set_part_key(pd, cmd.cmd.part_key);
|
|
break;
|
|
case __IPATH_CMD_SLAVE_INFO:
|
|
ret = ipath_get_slave_info(pd,
|
|
(void __user *) (unsigned long)
|
|
cmd.cmd.slave_mask_addr);
|
|
break;
|
|
case IPATH_CMD_PIOAVAILUPD:
|
|
ipath_force_pio_avail_update(pd->port_dd);
|
|
break;
|
|
case IPATH_CMD_POLL_TYPE:
|
|
pd->poll_type = cmd.cmd.poll_type;
|
|
break;
|
|
case IPATH_CMD_ARMLAUNCH_CTRL:
|
|
if (cmd.cmd.armlaunch_ctrl)
|
|
ipath_enable_armlaunch(pd->port_dd);
|
|
else
|
|
ipath_disable_armlaunch(pd->port_dd);
|
|
break;
|
|
case IPATH_CMD_SDMA_INFLIGHT:
|
|
ret = ipath_sdma_get_inflight(user_sdma_queue_fp(fp),
|
|
(u32 __user *) (unsigned long)
|
|
cmd.cmd.sdma_inflight);
|
|
break;
|
|
case IPATH_CMD_SDMA_COMPLETE:
|
|
ret = ipath_sdma_get_complete(pd->port_dd,
|
|
user_sdma_queue_fp(fp),
|
|
(u32 __user *) (unsigned long)
|
|
cmd.cmd.sdma_complete);
|
|
break;
|
|
}
|
|
|
|
if (ret >= 0)
|
|
ret = consumed;
|
|
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t ipath_writev(struct kiocb *iocb, const struct iovec *iov,
|
|
unsigned long dim, loff_t off)
|
|
{
|
|
struct file *filp = iocb->ki_filp;
|
|
struct ipath_filedata *fp = filp->private_data;
|
|
struct ipath_portdata *pd = port_fp(filp);
|
|
struct ipath_user_sdma_queue *pq = fp->pq;
|
|
|
|
if (!dim)
|
|
return -EINVAL;
|
|
|
|
return ipath_user_sdma_writev(pd->port_dd, pq, iov, dim);
|
|
}
|
|
|
|
static struct class *ipath_class;
|
|
|
|
static int init_cdev(int minor, char *name, const struct file_operations *fops,
|
|
struct cdev **cdevp, struct device **devp)
|
|
{
|
|
const dev_t dev = MKDEV(IPATH_MAJOR, minor);
|
|
struct cdev *cdev = NULL;
|
|
struct device *device = NULL;
|
|
int ret;
|
|
|
|
cdev = cdev_alloc();
|
|
if (!cdev) {
|
|
printk(KERN_ERR IPATH_DRV_NAME
|
|
": Could not allocate cdev for minor %d, %s\n",
|
|
minor, name);
|
|
ret = -ENOMEM;
|
|
goto done;
|
|
}
|
|
|
|
cdev->owner = THIS_MODULE;
|
|
cdev->ops = fops;
|
|
kobject_set_name(&cdev->kobj, name);
|
|
|
|
ret = cdev_add(cdev, dev, 1);
|
|
if (ret < 0) {
|
|
printk(KERN_ERR IPATH_DRV_NAME
|
|
": Could not add cdev for minor %d, %s (err %d)\n",
|
|
minor, name, -ret);
|
|
goto err_cdev;
|
|
}
|
|
|
|
device = device_create(ipath_class, NULL, dev, NULL, name);
|
|
|
|
if (IS_ERR(device)) {
|
|
ret = PTR_ERR(device);
|
|
printk(KERN_ERR IPATH_DRV_NAME ": Could not create "
|
|
"device for minor %d, %s (err %d)\n",
|
|
minor, name, -ret);
|
|
goto err_cdev;
|
|
}
|
|
|
|
goto done;
|
|
|
|
err_cdev:
|
|
cdev_del(cdev);
|
|
cdev = NULL;
|
|
|
|
done:
|
|
if (ret >= 0) {
|
|
*cdevp = cdev;
|
|
*devp = device;
|
|
} else {
|
|
*cdevp = NULL;
|
|
*devp = NULL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ipath_cdev_init(int minor, char *name, const struct file_operations *fops,
|
|
struct cdev **cdevp, struct device **devp)
|
|
{
|
|
return init_cdev(minor, name, fops, cdevp, devp);
|
|
}
|
|
|
|
static void cleanup_cdev(struct cdev **cdevp,
|
|
struct device **devp)
|
|
{
|
|
struct device *dev = *devp;
|
|
|
|
if (dev) {
|
|
device_unregister(dev);
|
|
*devp = NULL;
|
|
}
|
|
|
|
if (*cdevp) {
|
|
cdev_del(*cdevp);
|
|
*cdevp = NULL;
|
|
}
|
|
}
|
|
|
|
void ipath_cdev_cleanup(struct cdev **cdevp,
|
|
struct device **devp)
|
|
{
|
|
cleanup_cdev(cdevp, devp);
|
|
}
|
|
|
|
static struct cdev *wildcard_cdev;
|
|
static struct device *wildcard_dev;
|
|
|
|
static const dev_t dev = MKDEV(IPATH_MAJOR, 0);
|
|
|
|
static int user_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = register_chrdev_region(dev, IPATH_NMINORS, IPATH_DRV_NAME);
|
|
if (ret < 0) {
|
|
printk(KERN_ERR IPATH_DRV_NAME ": Could not register "
|
|
"chrdev region (err %d)\n", -ret);
|
|
goto done;
|
|
}
|
|
|
|
ipath_class = class_create(THIS_MODULE, IPATH_DRV_NAME);
|
|
|
|
if (IS_ERR(ipath_class)) {
|
|
ret = PTR_ERR(ipath_class);
|
|
printk(KERN_ERR IPATH_DRV_NAME ": Could not create "
|
|
"device class (err %d)\n", -ret);
|
|
goto bail;
|
|
}
|
|
|
|
goto done;
|
|
bail:
|
|
unregister_chrdev_region(dev, IPATH_NMINORS);
|
|
done:
|
|
return ret;
|
|
}
|
|
|
|
static void user_cleanup(void)
|
|
{
|
|
if (ipath_class) {
|
|
class_destroy(ipath_class);
|
|
ipath_class = NULL;
|
|
}
|
|
|
|
unregister_chrdev_region(dev, IPATH_NMINORS);
|
|
}
|
|
|
|
static atomic_t user_count = ATOMIC_INIT(0);
|
|
static atomic_t user_setup = ATOMIC_INIT(0);
|
|
|
|
int ipath_user_add(struct ipath_devdata *dd)
|
|
{
|
|
char name[10];
|
|
int ret;
|
|
|
|
if (atomic_inc_return(&user_count) == 1) {
|
|
ret = user_init();
|
|
if (ret < 0) {
|
|
ipath_dev_err(dd, "Unable to set up user support: "
|
|
"error %d\n", -ret);
|
|
goto bail;
|
|
}
|
|
ret = init_cdev(0, "ipath", &ipath_file_ops, &wildcard_cdev,
|
|
&wildcard_dev);
|
|
if (ret < 0) {
|
|
ipath_dev_err(dd, "Could not create wildcard "
|
|
"minor: error %d\n", -ret);
|
|
goto bail_user;
|
|
}
|
|
|
|
atomic_set(&user_setup, 1);
|
|
}
|
|
|
|
snprintf(name, sizeof(name), "ipath%d", dd->ipath_unit);
|
|
|
|
ret = init_cdev(dd->ipath_unit + 1, name, &ipath_file_ops,
|
|
&dd->user_cdev, &dd->user_dev);
|
|
if (ret < 0)
|
|
ipath_dev_err(dd, "Could not create user minor %d, %s\n",
|
|
dd->ipath_unit + 1, name);
|
|
|
|
goto bail;
|
|
|
|
bail_user:
|
|
user_cleanup();
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
void ipath_user_remove(struct ipath_devdata *dd)
|
|
{
|
|
cleanup_cdev(&dd->user_cdev, &dd->user_dev);
|
|
|
|
if (atomic_dec_return(&user_count) == 0) {
|
|
if (atomic_read(&user_setup) == 0)
|
|
goto bail;
|
|
|
|
cleanup_cdev(&wildcard_cdev, &wildcard_dev);
|
|
user_cleanup();
|
|
|
|
atomic_set(&user_setup, 0);
|
|
}
|
|
bail:
|
|
return;
|
|
}
|