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percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
455 lines
11 KiB
C
455 lines
11 KiB
C
/*
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* Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2006, 2007 Cisco Systems, 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/errno.h>
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#include <linux/mm.h>
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#include <linux/scatterlist.h>
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#include <linux/slab.h>
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#include <linux/mlx4/cmd.h>
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#include "mlx4.h"
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#include "icm.h"
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#include "fw.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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MLX4_ICM_ALLOC_SIZE = 1 << 18,
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MLX4_TABLE_CHUNK_SIZE = 1 << 18
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};
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static void mlx4_free_icm_pages(struct mlx4_dev *dev, struct mlx4_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)
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__free_pages(sg_page(&chunk->mem[i]),
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get_order(chunk->mem[i].length));
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}
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static void mlx4_free_icm_coherent(struct mlx4_dev *dev, struct mlx4_icm_chunk *chunk)
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{
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int i;
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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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lowmem_page_address(sg_page(&chunk->mem[i])),
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sg_dma_address(&chunk->mem[i]));
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}
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void mlx4_free_icm(struct mlx4_dev *dev, struct mlx4_icm *icm, int coherent)
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{
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struct mlx4_icm_chunk *chunk, *tmp;
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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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if (coherent)
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mlx4_free_icm_coherent(dev, chunk);
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else
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mlx4_free_icm_pages(dev, chunk);
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kfree(chunk);
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}
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kfree(icm);
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}
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static int mlx4_alloc_icm_pages(struct scatterlist *mem, int order, gfp_t gfp_mask)
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{
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struct page *page;
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page = alloc_pages(gfp_mask, order);
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if (!page)
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return -ENOMEM;
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sg_set_page(mem, page, PAGE_SIZE << order, 0);
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return 0;
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}
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static int mlx4_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,
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&sg_dma_address(mem), 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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struct mlx4_icm *mlx4_alloc_icm(struct mlx4_dev *dev, int npages,
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gfp_t gfp_mask, int coherent)
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{
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struct mlx4_icm *icm;
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struct mlx4_icm_chunk *chunk = NULL;
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int cur_order;
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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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icm = kmalloc(sizeof *icm, gfp_mask & ~(__GFP_HIGHMEM | __GFP_NOWARN));
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if (!icm)
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return NULL;
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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(MLX4_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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sg_init_table(chunk->mem, MLX4_ICM_CHUNK_LEN);
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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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if (coherent)
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ret = mlx4_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 = mlx4_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;
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if (coherent)
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++chunk->nsg;
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else if (chunk->npages == MLX4_ICM_CHUNK_LEN) {
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chunk->nsg = pci_map_sg(dev->pdev, chunk->mem,
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chunk->npages,
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PCI_DMA_BIDIRECTIONAL);
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if (chunk->nsg <= 0)
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goto fail;
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chunk = NULL;
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}
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npages -= 1 << cur_order;
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} else {
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--cur_order;
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if (cur_order < 0)
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goto fail;
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}
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}
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if (!coherent && chunk) {
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chunk->nsg = pci_map_sg(dev->pdev, chunk->mem,
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chunk->npages,
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PCI_DMA_BIDIRECTIONAL);
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if (chunk->nsg <= 0)
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goto fail;
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}
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return icm;
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fail:
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mlx4_free_icm(dev, icm, coherent);
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return NULL;
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}
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static int mlx4_MAP_ICM(struct mlx4_dev *dev, struct mlx4_icm *icm, u64 virt)
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{
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return mlx4_map_cmd(dev, MLX4_CMD_MAP_ICM, icm, virt);
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}
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int mlx4_UNMAP_ICM(struct mlx4_dev *dev, u64 virt, u32 page_count)
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{
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return mlx4_cmd(dev, virt, page_count, 0, MLX4_CMD_UNMAP_ICM,
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MLX4_CMD_TIME_CLASS_B);
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}
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int mlx4_MAP_ICM_page(struct mlx4_dev *dev, u64 dma_addr, u64 virt)
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{
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struct mlx4_cmd_mailbox *mailbox;
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__be64 *inbox;
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int err;
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mailbox = mlx4_alloc_cmd_mailbox(dev);
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if (IS_ERR(mailbox))
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return PTR_ERR(mailbox);
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inbox = mailbox->buf;
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inbox[0] = cpu_to_be64(virt);
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inbox[1] = cpu_to_be64(dma_addr);
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err = mlx4_cmd(dev, mailbox->dma, 1, 0, MLX4_CMD_MAP_ICM,
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MLX4_CMD_TIME_CLASS_B);
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mlx4_free_cmd_mailbox(dev, mailbox);
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if (!err)
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mlx4_dbg(dev, "Mapped page at %llx to %llx for ICM.\n",
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(unsigned long long) dma_addr, (unsigned long long) virt);
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return err;
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}
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int mlx4_MAP_ICM_AUX(struct mlx4_dev *dev, struct mlx4_icm *icm)
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{
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return mlx4_map_cmd(dev, MLX4_CMD_MAP_ICM_AUX, icm, -1);
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}
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int mlx4_UNMAP_ICM_AUX(struct mlx4_dev *dev)
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{
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return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_UNMAP_ICM_AUX, MLX4_CMD_TIME_CLASS_B);
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}
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int mlx4_table_get(struct mlx4_dev *dev, struct mlx4_icm_table *table, int obj)
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{
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int i = (obj & (table->num_obj - 1)) / (MLX4_TABLE_CHUNK_SIZE / table->obj_size);
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int ret = 0;
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mutex_lock(&table->mutex);
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if (table->icm[i]) {
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++table->icm[i]->refcount;
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goto out;
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}
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table->icm[i] = mlx4_alloc_icm(dev, MLX4_TABLE_CHUNK_SIZE >> PAGE_SHIFT,
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(table->lowmem ? GFP_KERNEL : GFP_HIGHUSER) |
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__GFP_NOWARN, table->coherent);
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if (!table->icm[i]) {
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ret = -ENOMEM;
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goto out;
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}
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if (mlx4_MAP_ICM(dev, table->icm[i], table->virt +
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(u64) i * MLX4_TABLE_CHUNK_SIZE)) {
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mlx4_free_icm(dev, table->icm[i], table->coherent);
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table->icm[i] = NULL;
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ret = -ENOMEM;
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goto out;
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}
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++table->icm[i]->refcount;
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out:
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mutex_unlock(&table->mutex);
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return ret;
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}
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void mlx4_table_put(struct mlx4_dev *dev, struct mlx4_icm_table *table, int obj)
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{
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int i;
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i = (obj & (table->num_obj - 1)) / (MLX4_TABLE_CHUNK_SIZE / table->obj_size);
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mutex_lock(&table->mutex);
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if (--table->icm[i]->refcount == 0) {
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mlx4_UNMAP_ICM(dev, table->virt + i * MLX4_TABLE_CHUNK_SIZE,
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MLX4_TABLE_CHUNK_SIZE / MLX4_ICM_PAGE_SIZE);
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mlx4_free_icm(dev, table->icm[i], table->coherent);
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table->icm[i] = NULL;
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}
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mutex_unlock(&table->mutex);
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}
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void *mlx4_table_find(struct mlx4_icm_table *table, int obj, dma_addr_t *dma_handle)
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{
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int idx, offset, dma_offset, i;
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struct mlx4_icm_chunk *chunk;
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struct mlx4_icm *icm;
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struct page *page = NULL;
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if (!table->lowmem)
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return NULL;
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mutex_lock(&table->mutex);
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idx = (obj & (table->num_obj - 1)) * table->obj_size;
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icm = table->icm[idx / MLX4_TABLE_CHUNK_SIZE];
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dma_offset = offset = idx % MLX4_TABLE_CHUNK_SIZE;
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if (!icm)
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goto out;
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list_for_each_entry(chunk, &icm->chunk_list, list) {
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for (i = 0; i < chunk->npages; ++i) {
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if (dma_handle && dma_offset >= 0) {
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if (sg_dma_len(&chunk->mem[i]) > dma_offset)
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*dma_handle = sg_dma_address(&chunk->mem[i]) +
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dma_offset;
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dma_offset -= sg_dma_len(&chunk->mem[i]);
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}
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/*
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* DMA mapping can merge pages but not split them,
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* so if we found the page, dma_handle has already
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* been assigned to.
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*/
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if (chunk->mem[i].length > offset) {
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page = sg_page(&chunk->mem[i]);
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goto out;
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}
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offset -= chunk->mem[i].length;
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}
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}
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out:
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mutex_unlock(&table->mutex);
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return page ? lowmem_page_address(page) + offset : NULL;
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}
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int mlx4_table_get_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
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int start, int end)
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{
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int inc = MLX4_TABLE_CHUNK_SIZE / table->obj_size;
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int i, err;
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for (i = start; i <= end; i += inc) {
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err = mlx4_table_get(dev, table, i);
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if (err)
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goto fail;
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}
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return 0;
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fail:
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while (i > start) {
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i -= inc;
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mlx4_table_put(dev, table, i);
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}
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return err;
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}
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void mlx4_table_put_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
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int start, int end)
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{
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int i;
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for (i = start; i <= end; i += MLX4_TABLE_CHUNK_SIZE / table->obj_size)
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mlx4_table_put(dev, table, i);
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}
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int mlx4_init_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table,
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u64 virt, int obj_size, int nobj, int reserved,
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int use_lowmem, int use_coherent)
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{
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int obj_per_chunk;
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int num_icm;
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unsigned chunk_size;
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int i;
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obj_per_chunk = MLX4_TABLE_CHUNK_SIZE / obj_size;
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num_icm = (nobj + obj_per_chunk - 1) / obj_per_chunk;
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table->icm = kcalloc(num_icm, sizeof *table->icm, GFP_KERNEL);
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if (!table->icm)
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return -ENOMEM;
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table->virt = virt;
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table->num_icm = num_icm;
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table->num_obj = nobj;
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table->obj_size = obj_size;
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table->lowmem = use_lowmem;
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table->coherent = use_coherent;
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mutex_init(&table->mutex);
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for (i = 0; i * MLX4_TABLE_CHUNK_SIZE < reserved * obj_size; ++i) {
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chunk_size = MLX4_TABLE_CHUNK_SIZE;
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if ((i + 1) * MLX4_TABLE_CHUNK_SIZE > nobj * obj_size)
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chunk_size = PAGE_ALIGN(nobj * obj_size - i * MLX4_TABLE_CHUNK_SIZE);
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table->icm[i] = mlx4_alloc_icm(dev, chunk_size >> PAGE_SHIFT,
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(use_lowmem ? GFP_KERNEL : GFP_HIGHUSER) |
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__GFP_NOWARN, use_coherent);
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if (!table->icm[i])
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goto err;
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if (mlx4_MAP_ICM(dev, table->icm[i], virt + i * MLX4_TABLE_CHUNK_SIZE)) {
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mlx4_free_icm(dev, table->icm[i], use_coherent);
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table->icm[i] = NULL;
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goto err;
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}
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/*
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* Add a reference to this ICM chunk so that it never
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* gets freed (since it contains reserved firmware objects).
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*/
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++table->icm[i]->refcount;
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}
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return 0;
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err:
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for (i = 0; i < num_icm; ++i)
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if (table->icm[i]) {
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mlx4_UNMAP_ICM(dev, virt + i * MLX4_TABLE_CHUNK_SIZE,
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MLX4_TABLE_CHUNK_SIZE / MLX4_ICM_PAGE_SIZE);
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mlx4_free_icm(dev, table->icm[i], use_coherent);
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}
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return -ENOMEM;
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}
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void mlx4_cleanup_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table)
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{
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int i;
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for (i = 0; i < table->num_icm; ++i)
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if (table->icm[i]) {
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mlx4_UNMAP_ICM(dev, table->virt + i * MLX4_TABLE_CHUNK_SIZE,
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MLX4_TABLE_CHUNK_SIZE / MLX4_ICM_PAGE_SIZE);
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mlx4_free_icm(dev, table->icm[i], table->coherent);
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}
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kfree(table->icm);
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}
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