2005-04-16 18:20:36 -04:00
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/*
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* Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
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2005-07-07 20:57:16 -04:00
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* Copyright (c) 2005 Cisco Systems. All rights reserved.
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2005-08-11 02:03:10 -04:00
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* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
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2005-04-16 18:20:36 -04:00
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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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2005-05-01 11:59:14 -04:00
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#include <linux/mm.h>
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2007-02-10 16:15:08 -05:00
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#include <linux/scatterlist.h>
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Detach sched.h from mm.h
First thing mm.h does is including sched.h solely for can_do_mlock() inline
function which has "current" dereference inside. By dealing with can_do_mlock()
mm.h can be detached from sched.h which is good. See below, why.
This patch
a) removes unconditional inclusion of sched.h from mm.h
b) makes can_do_mlock() normal function in mm/mlock.c
c) exports can_do_mlock() to not break compilation
d) adds sched.h inclusions back to files that were getting it indirectly.
e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were
getting them indirectly
Net result is:
a) mm.h users would get less code to open, read, preprocess, parse, ... if
they don't need sched.h
b) sched.h stops being dependency for significant number of files:
on x86_64 allmodconfig touching sched.h results in recompile of 4083 files,
after patch it's only 3744 (-8.3%).
Cross-compile tested on
all arm defconfigs, all mips defconfigs, all powerpc defconfigs,
alpha alpha-up
arm
i386 i386-up i386-defconfig i386-allnoconfig
ia64 ia64-up
m68k
mips
parisc parisc-up
powerpc powerpc-up
s390 s390-up
sparc sparc-up
sparc64 sparc64-up
um-x86_64
x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig
as well as my two usual configs.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-20 17:22:52 -04:00
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#include <linux/sched.h>
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2007-02-10 16:15:08 -05:00
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#include <asm/page.h>
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2005-05-01 11:59:14 -04:00
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2005-04-16 18:20:36 -04:00
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#include "mthca_memfree.h"
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#include "mthca_dev.h"
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#include "mthca_cmd.h"
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/*
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* We allocate in as big chunks as we can, up to a maximum of 256 KB
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* per chunk.
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*/
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enum {
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MTHCA_ICM_ALLOC_SIZE = 1 << 18,
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MTHCA_TABLE_CHUNK_SIZE = 1 << 18
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};
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2005-07-07 20:57:16 -04:00
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struct mthca_user_db_table {
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2006-01-30 19:45:11 -05:00
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struct mutex mutex;
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2005-07-07 20:57:16 -04:00
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struct {
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u64 uvirt;
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struct scatterlist mem;
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int refcount;
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} page[0];
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};
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2007-02-10 16:15:08 -05:00
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static void mthca_free_icm_pages(struct mthca_dev *dev, struct mthca_icm_chunk *chunk)
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{
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int i;
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if (chunk->nsg > 0)
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pci_unmap_sg(dev->pdev, chunk->mem, chunk->npages,
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PCI_DMA_BIDIRECTIONAL);
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for (i = 0; i < chunk->npages; ++i)
|
2007-10-22 15:19:53 -04:00
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__free_pages(sg_page(&chunk->mem[i]),
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2007-02-10 16:15:08 -05:00
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get_order(chunk->mem[i].length));
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}
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static void mthca_free_icm_coherent(struct mthca_dev *dev, struct mthca_icm_chunk *chunk)
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2005-04-16 18:20:36 -04:00
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{
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int i;
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2007-02-10 16:15:08 -05:00
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for (i = 0; i < chunk->npages; ++i) {
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dma_free_coherent(&dev->pdev->dev, chunk->mem[i].length,
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2007-10-22 15:19:53 -04:00
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lowmem_page_address(sg_page(&chunk->mem[i])),
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2007-02-10 16:15:08 -05:00
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sg_dma_address(&chunk->mem[i]));
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}
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}
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void mthca_free_icm(struct mthca_dev *dev, struct mthca_icm *icm, int coherent)
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{
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struct mthca_icm_chunk *chunk, *tmp;
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2005-04-16 18:20:36 -04:00
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if (!icm)
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return;
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list_for_each_entry_safe(chunk, tmp, &icm->chunk_list, list) {
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2007-02-10 16:15:08 -05:00
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if (coherent)
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mthca_free_icm_coherent(dev, chunk);
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else
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mthca_free_icm_pages(dev, chunk);
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2005-04-16 18:20:36 -04:00
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kfree(chunk);
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}
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kfree(icm);
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}
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2007-02-10 16:15:08 -05:00
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static int mthca_alloc_icm_pages(struct scatterlist *mem, int order, gfp_t gfp_mask)
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{
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2007-10-22 15:19:53 -04:00
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struct page *page;
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2008-06-23 12:29:58 -04:00
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/*
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* Use __GFP_ZERO because buggy firmware assumes ICM pages are
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* cleared, and subtle failures are seen if they aren't.
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*/
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page = alloc_pages(gfp_mask | __GFP_ZERO, order);
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2007-10-22 15:19:53 -04:00
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if (!page)
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2007-02-10 16:15:08 -05:00
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return -ENOMEM;
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2007-10-24 05:20:47 -04:00
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sg_set_page(mem, page, PAGE_SIZE << order, 0);
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2007-02-10 16:15:08 -05:00
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return 0;
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}
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static int mthca_alloc_icm_coherent(struct device *dev, struct scatterlist *mem,
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int order, gfp_t gfp_mask)
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{
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void *buf = dma_alloc_coherent(dev, PAGE_SIZE << order, &sg_dma_address(mem),
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gfp_mask);
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if (!buf)
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return -ENOMEM;
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sg_set_buf(mem, buf, PAGE_SIZE << order);
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BUG_ON(mem->offset);
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sg_dma_len(mem) = PAGE_SIZE << order;
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return 0;
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}
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2005-04-16 18:20:36 -04:00
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struct mthca_icm *mthca_alloc_icm(struct mthca_dev *dev, int npages,
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2007-02-10 16:15:08 -05:00
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gfp_t gfp_mask, int coherent)
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2005-04-16 18:20:36 -04:00
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{
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struct mthca_icm *icm;
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struct mthca_icm_chunk *chunk = NULL;
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int cur_order;
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2007-02-10 16:15:08 -05:00
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int ret;
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/* We use sg_set_buf for coherent allocs, which assumes low memory */
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BUG_ON(coherent && (gfp_mask & __GFP_HIGHMEM));
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2005-04-16 18:20:36 -04:00
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icm = kmalloc(sizeof *icm, gfp_mask & ~(__GFP_HIGHMEM | __GFP_NOWARN));
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if (!icm)
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return icm;
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icm->refcount = 0;
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INIT_LIST_HEAD(&icm->chunk_list);
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cur_order = get_order(MTHCA_ICM_ALLOC_SIZE);
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while (npages > 0) {
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if (!chunk) {
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chunk = kmalloc(sizeof *chunk,
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gfp_mask & ~(__GFP_HIGHMEM | __GFP_NOWARN));
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if (!chunk)
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goto fail;
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|
2007-10-22 15:19:53 -04:00
|
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sg_init_table(chunk->mem, MTHCA_ICM_CHUNK_LEN);
|
2005-04-16 18:20:36 -04:00
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chunk->npages = 0;
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chunk->nsg = 0;
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list_add_tail(&chunk->list, &icm->chunk_list);
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}
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while (1 << cur_order > npages)
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--cur_order;
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|
2007-02-10 16:15:08 -05:00
|
|
|
if (coherent)
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|
|
ret = mthca_alloc_icm_coherent(&dev->pdev->dev,
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&chunk->mem[chunk->npages],
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cur_order, gfp_mask);
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else
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|
ret = mthca_alloc_icm_pages(&chunk->mem[chunk->npages],
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cur_order, gfp_mask);
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|
|
|
if (!ret) {
|
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++chunk->npages;
|
2005-04-16 18:20:36 -04:00
|
|
|
|
2007-02-16 16:57:33 -05:00
|
|
|
if (coherent)
|
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|
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++chunk->nsg;
|
|
|
|
else if (chunk->npages == MTHCA_ICM_CHUNK_LEN) {
|
2005-04-16 18:20:36 -04:00
|
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|
chunk->nsg = pci_map_sg(dev->pdev, chunk->mem,
|
|
|
|
chunk->npages,
|
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PCI_DMA_BIDIRECTIONAL);
|
|
|
|
|
|
|
|
if (chunk->nsg <= 0)
|
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|
|
goto fail;
|
2007-02-10 16:15:08 -05:00
|
|
|
}
|
2005-04-16 18:20:36 -04:00
|
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|
2007-02-10 16:15:08 -05:00
|
|
|
if (chunk->npages == MTHCA_ICM_CHUNK_LEN)
|
2005-04-16 18:20:36 -04:00
|
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|
chunk = NULL;
|
|
|
|
|
|
|
|
npages -= 1 << cur_order;
|
|
|
|
} else {
|
|
|
|
--cur_order;
|
|
|
|
if (cur_order < 0)
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2007-02-10 16:15:08 -05:00
|
|
|
if (!coherent && chunk) {
|
2005-04-16 18:20:36 -04:00
|
|
|
chunk->nsg = pci_map_sg(dev->pdev, chunk->mem,
|
|
|
|
chunk->npages,
|
|
|
|
PCI_DMA_BIDIRECTIONAL);
|
|
|
|
|
|
|
|
if (chunk->nsg <= 0)
|
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|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
return icm;
|
|
|
|
|
|
|
|
fail:
|
2007-02-10 16:15:08 -05:00
|
|
|
mthca_free_icm(dev, icm, coherent);
|
2005-04-16 18:20:36 -04:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int obj)
|
|
|
|
{
|
|
|
|
int i = (obj & (table->num_obj - 1)) * table->obj_size / MTHCA_TABLE_CHUNK_SIZE;
|
|
|
|
int ret = 0;
|
|
|
|
u8 status;
|
|
|
|
|
2006-01-30 19:45:11 -05:00
|
|
|
mutex_lock(&table->mutex);
|
2005-04-16 18:20:36 -04:00
|
|
|
|
|
|
|
if (table->icm[i]) {
|
|
|
|
++table->icm[i]->refcount;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
table->icm[i] = mthca_alloc_icm(dev, MTHCA_TABLE_CHUNK_SIZE >> PAGE_SHIFT,
|
|
|
|
(table->lowmem ? GFP_KERNEL : GFP_HIGHUSER) |
|
2007-02-10 16:15:08 -05:00
|
|
|
__GFP_NOWARN, table->coherent);
|
2005-04-16 18:20:36 -04:00
|
|
|
if (!table->icm[i]) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (mthca_MAP_ICM(dev, table->icm[i], table->virt + i * MTHCA_TABLE_CHUNK_SIZE,
|
|
|
|
&status) || status) {
|
2007-02-10 16:15:08 -05:00
|
|
|
mthca_free_icm(dev, table->icm[i], table->coherent);
|
2005-04-16 18:20:36 -04:00
|
|
|
table->icm[i] = NULL;
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
++table->icm[i]->refcount;
|
|
|
|
|
|
|
|
out:
|
2006-01-30 19:45:11 -05:00
|
|
|
mutex_unlock(&table->mutex);
|
2005-04-16 18:20:36 -04:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj)
|
|
|
|
{
|
2005-06-27 17:36:43 -04:00
|
|
|
int i;
|
2005-04-16 18:20:36 -04:00
|
|
|
u8 status;
|
|
|
|
|
2005-06-27 17:36:43 -04:00
|
|
|
if (!mthca_is_memfree(dev))
|
|
|
|
return;
|
|
|
|
|
|
|
|
i = (obj & (table->num_obj - 1)) * table->obj_size / MTHCA_TABLE_CHUNK_SIZE;
|
|
|
|
|
2006-01-30 19:45:11 -05:00
|
|
|
mutex_lock(&table->mutex);
|
2005-04-16 18:20:36 -04:00
|
|
|
|
|
|
|
if (--table->icm[i]->refcount == 0) {
|
|
|
|
mthca_UNMAP_ICM(dev, table->virt + i * MTHCA_TABLE_CHUNK_SIZE,
|
2006-03-02 01:33:11 -05:00
|
|
|
MTHCA_TABLE_CHUNK_SIZE / MTHCA_ICM_PAGE_SIZE,
|
|
|
|
&status);
|
2007-02-10 16:15:08 -05:00
|
|
|
mthca_free_icm(dev, table->icm[i], table->coherent);
|
2005-04-16 18:20:36 -04:00
|
|
|
table->icm[i] = NULL;
|
|
|
|
}
|
|
|
|
|
2006-01-30 19:45:11 -05:00
|
|
|
mutex_unlock(&table->mutex);
|
2005-04-16 18:20:36 -04:00
|
|
|
}
|
|
|
|
|
2007-02-10 16:15:08 -05:00
|
|
|
void *mthca_table_find(struct mthca_icm_table *table, int obj, dma_addr_t *dma_handle)
|
2005-04-16 18:26:29 -04:00
|
|
|
{
|
2007-02-10 16:15:08 -05:00
|
|
|
int idx, offset, dma_offset, i;
|
2005-04-16 18:26:29 -04:00
|
|
|
struct mthca_icm_chunk *chunk;
|
|
|
|
struct mthca_icm *icm;
|
|
|
|
struct page *page = NULL;
|
|
|
|
|
|
|
|
if (!table->lowmem)
|
|
|
|
return NULL;
|
|
|
|
|
2006-01-30 19:45:11 -05:00
|
|
|
mutex_lock(&table->mutex);
|
2005-04-16 18:26:29 -04:00
|
|
|
|
|
|
|
idx = (obj & (table->num_obj - 1)) * table->obj_size;
|
|
|
|
icm = table->icm[idx / MTHCA_TABLE_CHUNK_SIZE];
|
2007-02-10 16:15:08 -05:00
|
|
|
dma_offset = offset = idx % MTHCA_TABLE_CHUNK_SIZE;
|
2005-04-16 18:26:29 -04:00
|
|
|
|
|
|
|
if (!icm)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
list_for_each_entry(chunk, &icm->chunk_list, list) {
|
|
|
|
for (i = 0; i < chunk->npages; ++i) {
|
2007-02-10 16:15:08 -05:00
|
|
|
if (dma_handle && dma_offset >= 0) {
|
|
|
|
if (sg_dma_len(&chunk->mem[i]) > dma_offset)
|
|
|
|
*dma_handle = sg_dma_address(&chunk->mem[i]) +
|
|
|
|
dma_offset;
|
|
|
|
dma_offset -= sg_dma_len(&chunk->mem[i]);
|
|
|
|
}
|
|
|
|
/* DMA mapping can merge pages but not split them,
|
|
|
|
* so if we found the page, dma_handle has already
|
|
|
|
* been assigned to. */
|
2007-01-03 07:46:30 -05:00
|
|
|
if (chunk->mem[i].length > offset) {
|
2007-10-22 15:19:53 -04:00
|
|
|
page = sg_page(&chunk->mem[i]);
|
2005-12-15 16:55:50 -05:00
|
|
|
goto out;
|
2005-04-16 18:26:29 -04:00
|
|
|
}
|
|
|
|
offset -= chunk->mem[i].length;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
out:
|
2006-01-30 19:45:11 -05:00
|
|
|
mutex_unlock(&table->mutex);
|
2005-04-16 18:26:29 -04:00
|
|
|
return page ? lowmem_page_address(page) + offset : NULL;
|
|
|
|
}
|
|
|
|
|
2005-04-16 18:26:13 -04:00
|
|
|
int mthca_table_get_range(struct mthca_dev *dev, struct mthca_icm_table *table,
|
|
|
|
int start, int end)
|
|
|
|
{
|
|
|
|
int inc = MTHCA_TABLE_CHUNK_SIZE / table->obj_size;
|
|
|
|
int i, err;
|
|
|
|
|
|
|
|
for (i = start; i <= end; i += inc) {
|
|
|
|
err = mthca_table_get(dev, table, i);
|
|
|
|
if (err)
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
fail:
|
|
|
|
while (i > start) {
|
|
|
|
i -= inc;
|
|
|
|
mthca_table_put(dev, table, i);
|
|
|
|
}
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
void mthca_table_put_range(struct mthca_dev *dev, struct mthca_icm_table *table,
|
|
|
|
int start, int end)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
2005-06-27 17:36:43 -04:00
|
|
|
if (!mthca_is_memfree(dev))
|
|
|
|
return;
|
|
|
|
|
2005-04-16 18:26:13 -04:00
|
|
|
for (i = start; i <= end; i += MTHCA_TABLE_CHUNK_SIZE / table->obj_size)
|
|
|
|
mthca_table_put(dev, table, i);
|
|
|
|
}
|
|
|
|
|
2005-04-16 18:20:36 -04:00
|
|
|
struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev,
|
|
|
|
u64 virt, int obj_size,
|
|
|
|
int nobj, int reserved,
|
2007-02-10 16:15:08 -05:00
|
|
|
int use_lowmem, int use_coherent)
|
2005-04-16 18:20:36 -04:00
|
|
|
{
|
|
|
|
struct mthca_icm_table *table;
|
2008-04-17 00:01:13 -04:00
|
|
|
int obj_per_chunk;
|
2005-04-16 18:20:36 -04:00
|
|
|
int num_icm;
|
2005-08-19 13:36:11 -04:00
|
|
|
unsigned chunk_size;
|
2005-04-16 18:20:36 -04:00
|
|
|
int i;
|
|
|
|
u8 status;
|
|
|
|
|
2008-04-17 00:01:13 -04:00
|
|
|
obj_per_chunk = MTHCA_TABLE_CHUNK_SIZE / obj_size;
|
|
|
|
num_icm = DIV_ROUND_UP(nobj, obj_per_chunk);
|
2005-04-16 18:20:36 -04:00
|
|
|
|
|
|
|
table = kmalloc(sizeof *table + num_icm * sizeof *table->icm, GFP_KERNEL);
|
|
|
|
if (!table)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
table->virt = virt;
|
|
|
|
table->num_icm = num_icm;
|
|
|
|
table->num_obj = nobj;
|
|
|
|
table->obj_size = obj_size;
|
|
|
|
table->lowmem = use_lowmem;
|
2007-02-10 16:15:08 -05:00
|
|
|
table->coherent = use_coherent;
|
2006-01-30 19:45:11 -05:00
|
|
|
mutex_init(&table->mutex);
|
2005-04-16 18:20:36 -04:00
|
|
|
|
|
|
|
for (i = 0; i < num_icm; ++i)
|
|
|
|
table->icm[i] = NULL;
|
|
|
|
|
|
|
|
for (i = 0; i * MTHCA_TABLE_CHUNK_SIZE < reserved * obj_size; ++i) {
|
2005-08-19 13:36:11 -04:00
|
|
|
chunk_size = MTHCA_TABLE_CHUNK_SIZE;
|
|
|
|
if ((i + 1) * MTHCA_TABLE_CHUNK_SIZE > nobj * obj_size)
|
|
|
|
chunk_size = nobj * obj_size - i * MTHCA_TABLE_CHUNK_SIZE;
|
|
|
|
|
|
|
|
table->icm[i] = mthca_alloc_icm(dev, chunk_size >> PAGE_SHIFT,
|
2005-04-16 18:20:36 -04:00
|
|
|
(use_lowmem ? GFP_KERNEL : GFP_HIGHUSER) |
|
2007-02-10 16:15:08 -05:00
|
|
|
__GFP_NOWARN, use_coherent);
|
2005-04-16 18:20:36 -04:00
|
|
|
if (!table->icm[i])
|
|
|
|
goto err;
|
|
|
|
if (mthca_MAP_ICM(dev, table->icm[i], virt + i * MTHCA_TABLE_CHUNK_SIZE,
|
|
|
|
&status) || status) {
|
2007-02-10 16:15:08 -05:00
|
|
|
mthca_free_icm(dev, table->icm[i], table->coherent);
|
2005-04-16 18:20:36 -04:00
|
|
|
table->icm[i] = NULL;
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Add a reference to this ICM chunk so that it never
|
|
|
|
* gets freed (since it contains reserved firmware objects).
|
|
|
|
*/
|
|
|
|
++table->icm[i]->refcount;
|
|
|
|
}
|
|
|
|
|
|
|
|
return table;
|
|
|
|
|
|
|
|
err:
|
|
|
|
for (i = 0; i < num_icm; ++i)
|
|
|
|
if (table->icm[i]) {
|
|
|
|
mthca_UNMAP_ICM(dev, virt + i * MTHCA_TABLE_CHUNK_SIZE,
|
2006-03-02 01:33:11 -05:00
|
|
|
MTHCA_TABLE_CHUNK_SIZE / MTHCA_ICM_PAGE_SIZE,
|
2008-04-17 00:01:03 -04:00
|
|
|
&status);
|
2007-02-10 16:15:08 -05:00
|
|
|
mthca_free_icm(dev, table->icm[i], table->coherent);
|
2005-04-16 18:20:36 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
kfree(table);
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
u8 status;
|
|
|
|
|
|
|
|
for (i = 0; i < table->num_icm; ++i)
|
|
|
|
if (table->icm[i]) {
|
|
|
|
mthca_UNMAP_ICM(dev, table->virt + i * MTHCA_TABLE_CHUNK_SIZE,
|
2006-03-02 01:33:11 -05:00
|
|
|
MTHCA_TABLE_CHUNK_SIZE / MTHCA_ICM_PAGE_SIZE,
|
|
|
|
&status);
|
2007-02-10 16:15:08 -05:00
|
|
|
mthca_free_icm(dev, table->icm[i], table->coherent);
|
2005-04-16 18:20:36 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
kfree(table);
|
|
|
|
}
|
|
|
|
|
2005-07-07 20:57:16 -04:00
|
|
|
static u64 mthca_uarc_virt(struct mthca_dev *dev, struct mthca_uar *uar, int page)
|
2005-04-16 18:20:36 -04:00
|
|
|
{
|
|
|
|
return dev->uar_table.uarc_base +
|
2005-07-07 20:57:16 -04:00
|
|
|
uar->index * dev->uar_table.uarc_size +
|
2006-03-02 01:33:11 -05:00
|
|
|
page * MTHCA_ICM_PAGE_SIZE;
|
2005-04-16 18:20:36 -04:00
|
|
|
}
|
|
|
|
|
2005-07-07 20:57:16 -04:00
|
|
|
int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
|
|
|
|
struct mthca_user_db_table *db_tab, int index, u64 uaddr)
|
|
|
|
{
|
2007-10-22 15:19:53 -04:00
|
|
|
struct page *pages[1];
|
2005-07-07 20:57:16 -04:00
|
|
|
int ret = 0;
|
|
|
|
u8 status;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (!mthca_is_memfree(dev))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (index < 0 || index > dev->uar_table.uarc_size / 8)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2006-01-30 19:45:11 -05:00
|
|
|
mutex_lock(&db_tab->mutex);
|
2005-07-07 20:57:16 -04:00
|
|
|
|
|
|
|
i = index / MTHCA_DB_REC_PER_PAGE;
|
|
|
|
|
|
|
|
if ((db_tab->page[i].refcount >= MTHCA_DB_REC_PER_PAGE) ||
|
|
|
|
(db_tab->page[i].uvirt && db_tab->page[i].uvirt != uaddr) ||
|
|
|
|
(uaddr & 4095)) {
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (db_tab->page[i].refcount) {
|
|
|
|
++db_tab->page[i].refcount;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = get_user_pages(current, current->mm, uaddr & PAGE_MASK, 1, 1, 0,
|
2007-10-22 15:19:53 -04:00
|
|
|
pages, NULL);
|
2005-07-07 20:57:16 -04:00
|
|
|
if (ret < 0)
|
|
|
|
goto out;
|
|
|
|
|
2007-10-24 05:20:47 -04:00
|
|
|
sg_set_page(&db_tab->page[i].mem, pages[0], MTHCA_ICM_PAGE_SIZE,
|
|
|
|
uaddr & ~PAGE_MASK);
|
2005-07-07 20:57:16 -04:00
|
|
|
|
|
|
|
ret = pci_map_sg(dev->pdev, &db_tab->page[i].mem, 1, PCI_DMA_TODEVICE);
|
|
|
|
if (ret < 0) {
|
2007-10-22 15:19:53 -04:00
|
|
|
put_page(pages[0]);
|
2005-07-07 20:57:16 -04:00
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = mthca_MAP_ICM_page(dev, sg_dma_address(&db_tab->page[i].mem),
|
|
|
|
mthca_uarc_virt(dev, uar, i), &status);
|
|
|
|
if (!ret && status)
|
|
|
|
ret = -EINVAL;
|
|
|
|
if (ret) {
|
|
|
|
pci_unmap_sg(dev->pdev, &db_tab->page[i].mem, 1, PCI_DMA_TODEVICE);
|
2007-10-22 15:19:53 -04:00
|
|
|
put_page(sg_page(&db_tab->page[i].mem));
|
2005-07-07 20:57:16 -04:00
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
db_tab->page[i].uvirt = uaddr;
|
|
|
|
db_tab->page[i].refcount = 1;
|
|
|
|
|
|
|
|
out:
|
2006-01-30 19:45:11 -05:00
|
|
|
mutex_unlock(&db_tab->mutex);
|
2005-07-07 20:57:16 -04:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
void mthca_unmap_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
|
|
|
|
struct mthca_user_db_table *db_tab, int index)
|
|
|
|
{
|
|
|
|
if (!mthca_is_memfree(dev))
|
|
|
|
return;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* To make our bookkeeping simpler, we don't unmap DB
|
|
|
|
* pages until we clean up the whole db table.
|
|
|
|
*/
|
|
|
|
|
2006-01-30 19:45:11 -05:00
|
|
|
mutex_lock(&db_tab->mutex);
|
2005-07-07 20:57:16 -04:00
|
|
|
|
|
|
|
--db_tab->page[index / MTHCA_DB_REC_PER_PAGE].refcount;
|
|
|
|
|
2006-01-30 19:45:11 -05:00
|
|
|
mutex_unlock(&db_tab->mutex);
|
2005-07-07 20:57:16 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
struct mthca_user_db_table *mthca_init_user_db_tab(struct mthca_dev *dev)
|
|
|
|
{
|
|
|
|
struct mthca_user_db_table *db_tab;
|
|
|
|
int npages;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (!mthca_is_memfree(dev))
|
|
|
|
return NULL;
|
|
|
|
|
2006-03-02 01:33:11 -05:00
|
|
|
npages = dev->uar_table.uarc_size / MTHCA_ICM_PAGE_SIZE;
|
2005-07-07 20:57:16 -04:00
|
|
|
db_tab = kmalloc(sizeof *db_tab + npages * sizeof *db_tab->page, GFP_KERNEL);
|
|
|
|
if (!db_tab)
|
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
|
2006-01-30 19:45:11 -05:00
|
|
|
mutex_init(&db_tab->mutex);
|
2005-07-07 20:57:16 -04:00
|
|
|
for (i = 0; i < npages; ++i) {
|
|
|
|
db_tab->page[i].refcount = 0;
|
|
|
|
db_tab->page[i].uvirt = 0;
|
2008-02-12 17:38:22 -05:00
|
|
|
sg_init_table(&db_tab->page[i].mem, 1);
|
2005-07-07 20:57:16 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
return db_tab;
|
|
|
|
}
|
|
|
|
|
|
|
|
void mthca_cleanup_user_db_tab(struct mthca_dev *dev, struct mthca_uar *uar,
|
|
|
|
struct mthca_user_db_table *db_tab)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
u8 status;
|
|
|
|
|
|
|
|
if (!mthca_is_memfree(dev))
|
|
|
|
return;
|
|
|
|
|
2006-03-02 01:33:11 -05:00
|
|
|
for (i = 0; i < dev->uar_table.uarc_size / MTHCA_ICM_PAGE_SIZE; ++i) {
|
2005-07-07 20:57:16 -04:00
|
|
|
if (db_tab->page[i].uvirt) {
|
|
|
|
mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, uar, i), 1, &status);
|
|
|
|
pci_unmap_sg(dev->pdev, &db_tab->page[i].mem, 1, PCI_DMA_TODEVICE);
|
2007-10-22 15:19:53 -04:00
|
|
|
put_page(sg_page(&db_tab->page[i].mem));
|
2005-07-07 20:57:16 -04:00
|
|
|
}
|
|
|
|
}
|
2005-12-09 16:48:50 -05:00
|
|
|
|
|
|
|
kfree(db_tab);
|
2005-07-07 20:57:16 -04:00
|
|
|
}
|
|
|
|
|
2005-10-18 16:22:16 -04:00
|
|
|
int mthca_alloc_db(struct mthca_dev *dev, enum mthca_db_type type,
|
|
|
|
u32 qn, __be32 **db)
|
2005-04-16 18:20:36 -04:00
|
|
|
{
|
|
|
|
int group;
|
|
|
|
int start, end, dir;
|
|
|
|
int i, j;
|
|
|
|
struct mthca_db_page *page;
|
|
|
|
int ret = 0;
|
|
|
|
u8 status;
|
|
|
|
|
2006-01-30 19:45:11 -05:00
|
|
|
mutex_lock(&dev->db_tab->mutex);
|
2005-04-16 18:20:36 -04:00
|
|
|
|
|
|
|
switch (type) {
|
|
|
|
case MTHCA_DB_TYPE_CQ_ARM:
|
|
|
|
case MTHCA_DB_TYPE_SQ:
|
|
|
|
group = 0;
|
|
|
|
start = 0;
|
|
|
|
end = dev->db_tab->max_group1;
|
|
|
|
dir = 1;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case MTHCA_DB_TYPE_CQ_SET_CI:
|
|
|
|
case MTHCA_DB_TYPE_RQ:
|
|
|
|
case MTHCA_DB_TYPE_SRQ:
|
|
|
|
group = 1;
|
|
|
|
start = dev->db_tab->npages - 1;
|
|
|
|
end = dev->db_tab->min_group2;
|
|
|
|
dir = -1;
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
2005-04-16 18:26:20 -04:00
|
|
|
ret = -EINVAL;
|
|
|
|
goto out;
|
2005-04-16 18:20:36 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
for (i = start; i != end; i += dir)
|
|
|
|
if (dev->db_tab->page[i].db_rec &&
|
|
|
|
!bitmap_full(dev->db_tab->page[i].used,
|
|
|
|
MTHCA_DB_REC_PER_PAGE)) {
|
|
|
|
page = dev->db_tab->page + i;
|
|
|
|
goto found;
|
|
|
|
}
|
|
|
|
|
2005-09-22 00:40:12 -04:00
|
|
|
for (i = start; i != end; i += dir)
|
|
|
|
if (!dev->db_tab->page[i].db_rec) {
|
|
|
|
page = dev->db_tab->page + i;
|
|
|
|
goto alloc;
|
|
|
|
}
|
|
|
|
|
2005-04-16 18:20:36 -04:00
|
|
|
if (dev->db_tab->max_group1 >= dev->db_tab->min_group2 - 1) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2005-09-22 00:40:12 -04:00
|
|
|
if (group == 0)
|
|
|
|
++dev->db_tab->max_group1;
|
|
|
|
else
|
|
|
|
--dev->db_tab->min_group2;
|
|
|
|
|
2005-04-16 18:20:36 -04:00
|
|
|
page = dev->db_tab->page + end;
|
2005-09-22 00:40:12 -04:00
|
|
|
|
|
|
|
alloc:
|
2006-03-02 01:33:11 -05:00
|
|
|
page->db_rec = dma_alloc_coherent(&dev->pdev->dev, MTHCA_ICM_PAGE_SIZE,
|
2005-04-16 18:20:36 -04:00
|
|
|
&page->mapping, GFP_KERNEL);
|
|
|
|
if (!page->db_rec) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto out;
|
|
|
|
}
|
2006-03-02 01:33:11 -05:00
|
|
|
memset(page->db_rec, 0, MTHCA_ICM_PAGE_SIZE);
|
2005-04-16 18:20:36 -04:00
|
|
|
|
2005-07-07 20:57:16 -04:00
|
|
|
ret = mthca_MAP_ICM_page(dev, page->mapping,
|
|
|
|
mthca_uarc_virt(dev, &dev->driver_uar, i), &status);
|
2005-04-16 18:20:36 -04:00
|
|
|
if (!ret && status)
|
|
|
|
ret = -EINVAL;
|
|
|
|
if (ret) {
|
2006-03-02 01:33:11 -05:00
|
|
|
dma_free_coherent(&dev->pdev->dev, MTHCA_ICM_PAGE_SIZE,
|
2005-04-16 18:20:36 -04:00
|
|
|
page->db_rec, page->mapping);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
bitmap_zero(page->used, MTHCA_DB_REC_PER_PAGE);
|
|
|
|
|
|
|
|
found:
|
|
|
|
j = find_first_zero_bit(page->used, MTHCA_DB_REC_PER_PAGE);
|
|
|
|
set_bit(j, page->used);
|
|
|
|
|
|
|
|
if (group == 1)
|
|
|
|
j = MTHCA_DB_REC_PER_PAGE - 1 - j;
|
|
|
|
|
|
|
|
ret = i * MTHCA_DB_REC_PER_PAGE + j;
|
|
|
|
|
|
|
|
page->db_rec[j] = cpu_to_be64((qn << 8) | (type << 5));
|
|
|
|
|
2005-08-14 00:05:57 -04:00
|
|
|
*db = (__be32 *) &page->db_rec[j];
|
2005-04-16 18:20:36 -04:00
|
|
|
|
|
|
|
out:
|
2006-01-30 19:45:11 -05:00
|
|
|
mutex_unlock(&dev->db_tab->mutex);
|
2005-04-16 18:20:36 -04:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
void mthca_free_db(struct mthca_dev *dev, int type, int db_index)
|
|
|
|
{
|
|
|
|
int i, j;
|
|
|
|
struct mthca_db_page *page;
|
|
|
|
u8 status;
|
|
|
|
|
|
|
|
i = db_index / MTHCA_DB_REC_PER_PAGE;
|
|
|
|
j = db_index % MTHCA_DB_REC_PER_PAGE;
|
|
|
|
|
|
|
|
page = dev->db_tab->page + i;
|
|
|
|
|
2006-01-30 19:45:11 -05:00
|
|
|
mutex_lock(&dev->db_tab->mutex);
|
2005-04-16 18:20:36 -04:00
|
|
|
|
|
|
|
page->db_rec[j] = 0;
|
|
|
|
if (i >= dev->db_tab->min_group2)
|
|
|
|
j = MTHCA_DB_REC_PER_PAGE - 1 - j;
|
|
|
|
clear_bit(j, page->used);
|
|
|
|
|
|
|
|
if (bitmap_empty(page->used, MTHCA_DB_REC_PER_PAGE) &&
|
|
|
|
i >= dev->db_tab->max_group1 - 1) {
|
2005-07-07 20:57:16 -04:00
|
|
|
mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, &dev->driver_uar, i), 1, &status);
|
2005-04-16 18:20:36 -04:00
|
|
|
|
2006-03-02 01:33:11 -05:00
|
|
|
dma_free_coherent(&dev->pdev->dev, MTHCA_ICM_PAGE_SIZE,
|
2005-04-16 18:20:36 -04:00
|
|
|
page->db_rec, page->mapping);
|
|
|
|
page->db_rec = NULL;
|
|
|
|
|
|
|
|
if (i == dev->db_tab->max_group1) {
|
|
|
|
--dev->db_tab->max_group1;
|
|
|
|
/* XXX may be able to unmap more pages now */
|
|
|
|
}
|
|
|
|
if (i == dev->db_tab->min_group2)
|
|
|
|
++dev->db_tab->min_group2;
|
|
|
|
}
|
|
|
|
|
2006-01-30 19:45:11 -05:00
|
|
|
mutex_unlock(&dev->db_tab->mutex);
|
2005-04-16 18:20:36 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
int mthca_init_db_tab(struct mthca_dev *dev)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
2005-04-16 18:26:32 -04:00
|
|
|
if (!mthca_is_memfree(dev))
|
2005-04-16 18:20:36 -04:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
dev->db_tab = kmalloc(sizeof *dev->db_tab, GFP_KERNEL);
|
|
|
|
if (!dev->db_tab)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2006-01-30 19:45:11 -05:00
|
|
|
mutex_init(&dev->db_tab->mutex);
|
2005-04-16 18:20:36 -04:00
|
|
|
|
2006-03-02 01:33:11 -05:00
|
|
|
dev->db_tab->npages = dev->uar_table.uarc_size / MTHCA_ICM_PAGE_SIZE;
|
2005-04-16 18:20:36 -04:00
|
|
|
dev->db_tab->max_group1 = 0;
|
|
|
|
dev->db_tab->min_group2 = dev->db_tab->npages - 1;
|
|
|
|
|
|
|
|
dev->db_tab->page = kmalloc(dev->db_tab->npages *
|
|
|
|
sizeof *dev->db_tab->page,
|
|
|
|
GFP_KERNEL);
|
|
|
|
if (!dev->db_tab->page) {
|
|
|
|
kfree(dev->db_tab);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < dev->db_tab->npages; ++i)
|
|
|
|
dev->db_tab->page[i].db_rec = NULL;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
void mthca_cleanup_db_tab(struct mthca_dev *dev)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
u8 status;
|
|
|
|
|
2005-04-16 18:26:32 -04:00
|
|
|
if (!mthca_is_memfree(dev))
|
2005-04-16 18:20:36 -04:00
|
|
|
return;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Because we don't always free our UARC pages when they
|
|
|
|
* become empty to make mthca_free_db() simpler we need to
|
|
|
|
* make a sweep through the doorbell pages and free any
|
|
|
|
* leftover pages now.
|
|
|
|
*/
|
|
|
|
for (i = 0; i < dev->db_tab->npages; ++i) {
|
|
|
|
if (!dev->db_tab->page[i].db_rec)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (!bitmap_empty(dev->db_tab->page[i].used, MTHCA_DB_REC_PER_PAGE))
|
|
|
|
mthca_warn(dev, "Kernel UARC page %d not empty\n", i);
|
|
|
|
|
2005-07-07 20:57:16 -04:00
|
|
|
mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, &dev->driver_uar, i), 1, &status);
|
2005-04-16 18:20:36 -04:00
|
|
|
|
2006-03-02 01:33:11 -05:00
|
|
|
dma_free_coherent(&dev->pdev->dev, MTHCA_ICM_PAGE_SIZE,
|
2005-04-16 18:20:36 -04:00
|
|
|
dev->db_tab->page[i].db_rec,
|
|
|
|
dev->db_tab->page[i].mapping);
|
|
|
|
}
|
|
|
|
|
|
|
|
kfree(dev->db_tab->page);
|
|
|
|
kfree(dev->db_tab);
|
|
|
|
}
|