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3f69f4e0d6
The wrappers in include/linux/pci-dma-compat.h should go away. The patch has been generated with the coccinelle script below. It has been hand modified to use 'dma_set_mask_and_coherent()' instead of 'pci_set_dma_mask()/pci_set_consistent_dma_mask()' when applicable. This is less verbose. It has been compile tested. @@ @@ - PCI_DMA_BIDIRECTIONAL + DMA_BIDIRECTIONAL @@ @@ - PCI_DMA_TODEVICE + DMA_TO_DEVICE @@ @@ - PCI_DMA_FROMDEVICE + DMA_FROM_DEVICE @@ @@ - PCI_DMA_NONE + DMA_NONE @@ expression e1, e2, e3; @@ - pci_alloc_consistent(e1, e2, e3) + dma_alloc_coherent(&e1->dev, e2, e3, GFP_) @@ expression e1, e2, e3; @@ - pci_zalloc_consistent(e1, e2, e3) + dma_alloc_coherent(&e1->dev, e2, e3, GFP_) @@ expression e1, e2, e3, e4; @@ - pci_free_consistent(e1, e2, e3, e4) + dma_free_coherent(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_map_single(e1, e2, e3, e4) + dma_map_single(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_unmap_single(e1, e2, e3, e4) + dma_unmap_single(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4, e5; @@ - pci_map_page(e1, e2, e3, e4, e5) + dma_map_page(&e1->dev, e2, e3, e4, e5) @@ expression e1, e2, e3, e4; @@ - pci_unmap_page(e1, e2, e3, e4) + dma_unmap_page(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_map_sg(e1, e2, e3, e4) + dma_map_sg(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_unmap_sg(e1, e2, e3, e4) + dma_unmap_sg(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_dma_sync_single_for_cpu(e1, e2, e3, e4) + dma_sync_single_for_cpu(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_dma_sync_single_for_device(e1, e2, e3, e4) + dma_sync_single_for_device(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_dma_sync_sg_for_cpu(e1, e2, e3, e4) + dma_sync_sg_for_cpu(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_dma_sync_sg_for_device(e1, e2, e3, e4) + dma_sync_sg_for_device(&e1->dev, e2, e3, e4) @@ expression e1, e2; @@ - pci_dma_mapping_error(e1, e2) + dma_mapping_error(&e1->dev, e2) @@ expression e1, e2; @@ - pci_set_dma_mask(e1, e2) + dma_set_mask(&e1->dev, e2) @@ expression e1, e2; @@ - pci_set_consistent_dma_mask(e1, e2) + dma_set_coherent_mask(&e1->dev, e2) Link: https://lore.kernel.org/r/259e53b7a00f64bf081d41da8761b171b2ad8f5c.1629634798.git.christophe.jaillet@wanadoo.fr Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
138 lines
4.3 KiB
C
138 lines
4.3 KiB
C
/*
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* Copyright (c) 2006, 2007, 2008, 2009 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/mm.h>
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#include <linux/sched/signal.h>
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#include <linux/device.h>
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#include "qib.h"
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static void __qib_release_user_pages(struct page **p, size_t num_pages,
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int dirty)
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{
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unpin_user_pages_dirty_lock(p, num_pages, dirty);
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}
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/*
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* qib_map_page - a safety wrapper around pci_map_page()
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*
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* A dma_addr of all 0's is interpreted by the chip as "disabled".
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* Unfortunately, it can also be a valid dma_addr returned on some
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* architectures.
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*
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* The powerpc iommu assigns dma_addrs in ascending order, so we don't
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* have to bother with retries or mapping a dummy page to insure we
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* don't just get the same mapping again.
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*
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* I'm sure we won't be so lucky with other iommu's, so FIXME.
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*/
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int qib_map_page(struct pci_dev *hwdev, struct page *page, dma_addr_t *daddr)
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{
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dma_addr_t phys;
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phys = dma_map_page(&hwdev->dev, page, 0, PAGE_SIZE, DMA_FROM_DEVICE);
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if (dma_mapping_error(&hwdev->dev, phys))
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return -ENOMEM;
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if (!phys) {
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dma_unmap_page(&hwdev->dev, phys, PAGE_SIZE, DMA_FROM_DEVICE);
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phys = dma_map_page(&hwdev->dev, page, 0, PAGE_SIZE,
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DMA_FROM_DEVICE);
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if (dma_mapping_error(&hwdev->dev, phys))
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return -ENOMEM;
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/*
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* FIXME: If we get 0 again, we should keep this page,
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* map another, then free the 0 page.
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*/
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}
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*daddr = phys;
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return 0;
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}
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/**
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* qib_get_user_pages - lock user pages into memory
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* @start_page: the start page
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* @num_pages: the number of pages
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* @p: the output page structures
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*
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* This function takes a given start page (page aligned user virtual
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* address) and pins it and the following specified number of pages. For
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* now, num_pages is always 1, but that will probably change at some point
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* (because caller is doing expected sends on a single virtually contiguous
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* buffer, so we can do all pages at once).
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*/
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int qib_get_user_pages(unsigned long start_page, size_t num_pages,
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struct page **p)
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{
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unsigned long locked, lock_limit;
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size_t got;
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int ret;
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lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
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locked = atomic64_add_return(num_pages, ¤t->mm->pinned_vm);
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if (locked > lock_limit && !capable(CAP_IPC_LOCK)) {
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ret = -ENOMEM;
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goto bail;
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}
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mmap_read_lock(current->mm);
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for (got = 0; got < num_pages; got += ret) {
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ret = pin_user_pages(start_page + got * PAGE_SIZE,
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num_pages - got,
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FOLL_LONGTERM | FOLL_WRITE | FOLL_FORCE,
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p + got, NULL);
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if (ret < 0) {
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mmap_read_unlock(current->mm);
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goto bail_release;
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}
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}
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mmap_read_unlock(current->mm);
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return 0;
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bail_release:
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__qib_release_user_pages(p, got, 0);
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bail:
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atomic64_sub(num_pages, ¤t->mm->pinned_vm);
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return ret;
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}
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void qib_release_user_pages(struct page **p, size_t num_pages)
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{
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__qib_release_user_pages(p, num_pages, 1);
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/* during close after signal, mm can be NULL */
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if (current->mm)
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atomic64_sub(num_pages, ¤t->mm->pinned_vm);
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}
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