diff options
33 files changed, 129 insertions, 955 deletions
diff --git a/Documentation/ABI/removed/net_dma b/Documentation/ABI/removed/net_dma new file mode 100644 index 000000000000..a173aecc2f18 --- /dev/null +++ b/Documentation/ABI/removed/net_dma @@ -0,0 +1,8 @@ +What: tcp_dma_copybreak sysctl +Date: Removed in kernel v3.13 +Contact: Dan Williams <dan.j.williams@intel.com> +Description: + Formerly the lower limit, in bytes, of the size of socket reads + that will be offloaded to a DMA copy engine. Removed due to + coherency issues of the cpu potentially touching the buffers + while dma is in flight. diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index 29a93518bf18..caedb18d4564 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -580,12 +580,6 @@ tcp_workaround_signed_windows - BOOLEAN not receive a window scaling option from them. Default: 0 -tcp_dma_copybreak - INTEGER - Lower limit, in bytes, of the size of socket reads that will be - offloaded to a DMA copy engine, if one is present in the system - and CONFIG_NET_DMA is enabled. - Default: 4096 - tcp_thin_linear_timeouts - BOOLEAN Enable dynamic triggering of linear timeouts for thin streams. If set, a check is performed upon retransmission by timeout to diff --git a/MAINTAINERS b/MAINTAINERS index f10ed3914ea8..f107230fc73d 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1025,24 +1025,20 @@ F: arch/arm/mach-pxa/colibri-pxa270-income.c ARM/INTEL IOP32X ARM ARCHITECTURE M: Lennert Buytenhek <kernel@wantstofly.org> -M: Dan Williams <dan.j.williams@intel.com> L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers) S: Maintained ARM/INTEL IOP33X ARM ARCHITECTURE -M: Dan Williams <dan.j.williams@intel.com> L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers) -S: Maintained +S: Orphan ARM/INTEL IOP13XX ARM ARCHITECTURE M: Lennert Buytenhek <kernel@wantstofly.org> -M: Dan Williams <dan.j.williams@intel.com> L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers) S: Maintained ARM/INTEL IQ81342EX MACHINE SUPPORT M: Lennert Buytenhek <kernel@wantstofly.org> -M: Dan Williams <dan.j.williams@intel.com> L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers) S: Maintained @@ -1067,7 +1063,6 @@ F: drivers/pcmcia/pxa2xx_stargate2.c ARM/INTEL XSC3 (MANZANO) ARM CORE M: Lennert Buytenhek <kernel@wantstofly.org> -M: Dan Williams <dan.j.williams@intel.com> L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers) S: Maintained @@ -1562,9 +1557,9 @@ F: drivers/platform/x86/asus*.c F: drivers/platform/x86/eeepc*.c ASYNCHRONOUS TRANSFERS/TRANSFORMS (IOAT) API -M: Dan Williams <dan.j.williams@intel.com> +R: Dan Williams <dan.j.williams@intel.com> W: http://sourceforge.net/projects/xscaleiop -S: Maintained +S: Odd fixes F: Documentation/crypto/async-tx-api.txt F: crypto/async_tx/ F: drivers/dma/ @@ -2995,13 +2990,11 @@ T: git git://git.linaro.org/people/sumitsemwal/linux-dma-buf.git DMA GENERIC OFFLOAD ENGINE SUBSYSTEM M: Vinod Koul <vinod.koul@intel.com> -M: Dan Williams <dan.j.williams@intel.com> L: dmaengine@vger.kernel.org Q: https://patchwork.kernel.org/project/linux-dmaengine/list/ -S: Supported +S: Maintained F: drivers/dma/ F: include/linux/dma* -T: git git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx.git T: git git://git.infradead.org/users/vkoul/slave-dma.git (slave-dma) DME1737 HARDWARE MONITOR DRIVER @@ -4754,8 +4747,8 @@ F: arch/x86/kernel/cpu/microcode/core* F: arch/x86/kernel/cpu/microcode/intel* INTEL I/OAT DMA DRIVER -M: Dan Williams <dan.j.williams@intel.com> M: Dave Jiang <dave.jiang@intel.com> +R: Dan Williams <dan.j.williams@intel.com> L: dmaengine@vger.kernel.org Q: https://patchwork.kernel.org/project/linux-dmaengine/list/ S: Supported @@ -4770,7 +4763,7 @@ F: drivers/iommu/intel-iommu.c F: include/linux/intel-iommu.h INTEL IOP-ADMA DMA DRIVER -M: Dan Williams <dan.j.williams@intel.com> +R: Dan Williams <dan.j.williams@intel.com> S: Odd fixes F: drivers/dma/iop-adma.c diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c index 3c562f5a60bb..e1bce26cd4f9 100644 --- a/crypto/async_tx/async_xor.c +++ b/crypto/async_tx/async_xor.c @@ -78,8 +78,6 @@ do_async_xor(struct dma_chan *chan, struct dmaengine_unmap_data *unmap, tx = dma->device_prep_dma_xor(chan, dma_dest, src_list, xor_src_cnt, unmap->len, dma_flags); - src_list[0] = tmp; - if (unlikely(!tx)) async_tx_quiesce(&submit->depend_tx); @@ -92,6 +90,7 @@ do_async_xor(struct dma_chan *chan, struct dmaengine_unmap_data *unmap, xor_src_cnt, unmap->len, dma_flags); } + src_list[0] = tmp; dma_set_unmap(tx, unmap); async_tx_submit(chan, tx, submit); diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index 9b1ea0ef59af..a016490c95ae 100644 --- a/drivers/dma/Kconfig +++ b/drivers/dma/Kconfig @@ -427,18 +427,6 @@ config DMA_OF comment "DMA Clients" depends on DMA_ENGINE -config NET_DMA - bool "Network: TCP receive copy offload" - depends on DMA_ENGINE && NET - default (INTEL_IOATDMA || FSL_DMA) - depends on BROKEN - help - This enables the use of DMA engines in the network stack to - offload receive copy-to-user operations, freeing CPU cycles. - - Say Y here if you enabled INTEL_IOATDMA or FSL_DMA, otherwise - say N. - config ASYNC_TX_DMA bool "Async_tx: Offload support for the async_tx api" depends on DMA_ENGINE diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile index c6adb925f0b9..cb626c179911 100644 --- a/drivers/dma/Makefile +++ b/drivers/dma/Makefile @@ -6,7 +6,6 @@ obj-$(CONFIG_DMA_VIRTUAL_CHANNELS) += virt-dma.o obj-$(CONFIG_DMA_ACPI) += acpi-dma.o obj-$(CONFIG_DMA_OF) += of-dma.o -obj-$(CONFIG_NET_DMA) += iovlock.o obj-$(CONFIG_INTEL_MID_DMAC) += intel_mid_dma.o obj-$(CONFIG_DMATEST) += dmatest.o obj-$(CONFIG_INTEL_IOATDMA) += ioat/ diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index d5d30ed863ce..24bfaf0b92ba 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -1081,110 +1081,6 @@ dmaengine_get_unmap_data(struct device *dev, int nr, gfp_t flags) } EXPORT_SYMBOL(dmaengine_get_unmap_data); -/** - * dma_async_memcpy_pg_to_pg - offloaded copy from page to page - * @chan: DMA channel to offload copy to - * @dest_pg: destination page - * @dest_off: offset in page to copy to - * @src_pg: source page - * @src_off: offset in page to copy from - * @len: length - * - * Both @dest_page/@dest_off and @src_page/@src_off must be mappable to a bus - * address according to the DMA mapping API rules for streaming mappings. - * Both @dest_page/@dest_off and @src_page/@src_off must stay memory resident - * (kernel memory or locked user space pages). - */ -dma_cookie_t -dma_async_memcpy_pg_to_pg(struct dma_chan *chan, struct page *dest_pg, - unsigned int dest_off, struct page *src_pg, unsigned int src_off, - size_t len) -{ - struct dma_device *dev = chan->device; - struct dma_async_tx_descriptor *tx; - struct dmaengine_unmap_data *unmap; - dma_cookie_t cookie; - unsigned long flags; - - unmap = dmaengine_get_unmap_data(dev->dev, 2, GFP_NOWAIT); - if (!unmap) - return -ENOMEM; - - unmap->to_cnt = 1; - unmap->from_cnt = 1; - unmap->addr[0] = dma_map_page(dev->dev, src_pg, src_off, len, - DMA_TO_DEVICE); - unmap->addr[1] = dma_map_page(dev->dev, dest_pg, dest_off, len, - DMA_FROM_DEVICE); - unmap->len = len; - flags = DMA_CTRL_ACK; - tx = dev->device_prep_dma_memcpy(chan, unmap->addr[1], unmap->addr[0], - len, flags); - - if (!tx) { - dmaengine_unmap_put(unmap); - return -ENOMEM; - } - - dma_set_unmap(tx, unmap); - cookie = tx->tx_submit(tx); - dmaengine_unmap_put(unmap); - - preempt_disable(); - __this_cpu_add(chan->local->bytes_transferred, len); - __this_cpu_inc(chan->local->memcpy_count); - preempt_enable(); - - return cookie; -} -EXPORT_SYMBOL(dma_async_memcpy_pg_to_pg); - -/** - * dma_async_memcpy_buf_to_buf - offloaded copy between virtual addresses - * @chan: DMA channel to offload copy to - * @dest: destination address (virtual) - * @src: source address (virtual) - * @len: length - * - * Both @dest and @src must be mappable to a bus address according to the - * DMA mapping API rules for streaming mappings. - * Both @dest and @src must stay memory resident (kernel memory or locked - * user space pages). - */ -dma_cookie_t -dma_async_memcpy_buf_to_buf(struct dma_chan *chan, void *dest, - void *src, size_t len) -{ - return dma_async_memcpy_pg_to_pg(chan, virt_to_page(dest), - (unsigned long) dest & ~PAGE_MASK, - virt_to_page(src), - (unsigned long) src & ~PAGE_MASK, len); -} -EXPORT_SYMBOL(dma_async_memcpy_buf_to_buf); - -/** - * dma_async_memcpy_buf_to_pg - offloaded copy from address to page - * @chan: DMA channel to offload copy to - * @page: destination page - * @offset: offset in page to copy to - * @kdata: source address (virtual) - * @len: length - * - * Both @page/@offset and @kdata must be mappable to a bus address according - * to the DMA mapping API rules for streaming mappings. - * Both @page/@offset and @kdata must stay memory resident (kernel memory or - * locked user space pages) - */ -dma_cookie_t -dma_async_memcpy_buf_to_pg(struct dma_chan *chan, struct page *page, - unsigned int offset, void *kdata, size_t len) -{ - return dma_async_memcpy_pg_to_pg(chan, page, offset, - virt_to_page(kdata), - (unsigned long) kdata & ~PAGE_MASK, len); -} -EXPORT_SYMBOL(dma_async_memcpy_buf_to_pg); - void dma_async_tx_descriptor_init(struct dma_async_tx_descriptor *tx, struct dma_chan *chan) { diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c index e27cec25c59e..a8d7809e2f4c 100644 --- a/drivers/dma/dmatest.c +++ b/drivers/dma/dmatest.c @@ -688,14 +688,14 @@ static int dmatest_func(void *data) runtime = ktime_us_delta(ktime_get(), ktime); ret = 0; +err_dstbuf: for (i = 0; thread->dsts[i]; i++) kfree(thread->dsts[i]); -err_dstbuf: kfree(thread->dsts); err_dsts: +err_srcbuf: for (i = 0; thread->srcs[i]; i++) kfree(thread->srcs[i]); -err_srcbuf: kfree(thread->srcs); err_srcs: kfree(pq_coefs); diff --git a/drivers/dma/ioat/dca.c b/drivers/dma/ioat/dca.c index 9e84d5bc9307..3b55bb8d969a 100644 --- a/drivers/dma/ioat/dca.c +++ b/drivers/dma/ioat/dca.c @@ -35,6 +35,7 @@ #include "dma.h" #include "registers.h" +#include "dma_v2.h" /* * Bit 7 of a tag map entry is the "valid" bit, if it is set then bits 0:6 @@ -147,7 +148,7 @@ static int ioat_dca_add_requester(struct dca_provider *dca, struct device *dev) u16 id; /* This implementation only supports PCI-Express */ - if (dev->bus != &pci_bus_type) + if (!dev_is_pci(dev)) return -ENODEV; pdev = to_pci_dev(dev); id = dcaid_from_pcidev(pdev); @@ -179,7 +180,7 @@ static int ioat_dca_remove_requester(struct dca_provider *dca, int i; /* This implementation only supports PCI-Express */ - if (dev->bus != &pci_bus_type) + if (!dev_is_pci(dev)) return -ENODEV; pdev = to_pci_dev(dev); @@ -320,7 +321,7 @@ static int ioat2_dca_add_requester(struct dca_provider *dca, struct device *dev) u16 global_req_table; /* This implementation only supports PCI-Express */ - if (dev->bus != &pci_bus_type) + if (!dev_is_pci(dev)) return -ENODEV; pdev = to_pci_dev(dev); id = dcaid_from_pcidev(pdev); @@ -354,7 +355,7 @@ static int ioat2_dca_remove_requester(struct dca_provider *dca, u16 global_req_table; /* This implementation only supports PCI-Express */ - if (dev->bus != &pci_bus_type) + if (!dev_is_pci(dev)) return -ENODEV; pdev = to_pci_dev(dev); @@ -496,7 +497,7 @@ static int ioat3_dca_add_requester(struct dca_provider *dca, struct device *dev) u16 global_req_table; /* This implementation only supports PCI-Express */ - if (dev->bus != &pci_bus_type) + if (!dev_is_pci(dev)) return -ENODEV; pdev = to_pci_dev(dev); id = dcaid_from_pcidev(pdev); @@ -530,7 +531,7 @@ static int ioat3_dca_remove_requester(struct dca_provider *dca, u16 global_req_table; /* This implementation only supports PCI-Express */ - if (dev->bus != &pci_bus_type) + if (!dev_is_pci(dev)) return -ENODEV; pdev = to_pci_dev(dev); diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c index 4e3549a16132..940c1502a8b5 100644 --- a/drivers/dma/ioat/dma.c +++ b/drivers/dma/ioat/dma.c @@ -947,7 +947,7 @@ msix: for (i = 0; i < msixcnt; i++) device->msix_entries[i].entry = i; - err = pci_enable_msix(pdev, device->msix_entries, msixcnt); + err = pci_enable_msix_exact(pdev, device->msix_entries, msixcnt); if (err) goto msi; @@ -1222,7 +1222,6 @@ int ioat1_dma_probe(struct ioatdma_device *device, int dca) err = ioat_probe(device); if (err) return err; - ioat_set_tcp_copy_break(4096); err = ioat_register(device); if (err) return err; diff --git a/drivers/dma/ioat/dma.h b/drivers/dma/ioat/dma.h index e982f00a9843..d63f68b1aa35 100644 --- a/drivers/dma/ioat/dma.h +++ b/drivers/dma/ioat/dma.h @@ -214,13 +214,6 @@ __dump_desc_dbg(struct ioat_chan_common *chan, struct ioat_dma_descriptor *hw, #define dump_desc_dbg(c, d) \ ({ if (d) __dump_desc_dbg(&c->base, d->hw, &d->txd, desc_id(d)); 0; }) -static inline void ioat_set_tcp_copy_break(unsigned long copybreak) -{ - #ifdef CONFIG_NET_DMA - sysctl_tcp_dma_copybreak = copybreak; - #endif -} - static inline struct ioat_chan_common * ioat_chan_by_index(struct ioatdma_device *device, int index) { diff --git a/drivers/dma/ioat/dma_v2.c b/drivers/dma/ioat/dma_v2.c index 8d1058085eeb..695483e6be32 100644 --- a/drivers/dma/ioat/dma_v2.c +++ b/drivers/dma/ioat/dma_v2.c @@ -735,7 +735,8 @@ int ioat2_check_space_lock(struct ioat2_dma_chan *ioat, int num_descs) * called under bh_disabled so we need to trigger the timer * event directly */ - if (jiffies > chan->timer.expires && timer_pending(&chan->timer)) { + if (time_is_before_jiffies(chan->timer.expires) + && timer_pending(&chan->timer)) { struct ioatdma_device *device = chan->device; mod_timer(&chan->timer, jiffies + COMPLETION_TIMEOUT); @@ -899,7 +900,6 @@ int ioat2_dma_probe(struct ioatdma_device *device, int dca) err = ioat_probe(device); if (err) return err; - ioat_set_tcp_copy_break(2048); list_for_each_entry(c, &dma->channels, device_node) { chan = to_chan_common(c); diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c index b9b38a1cf92f..895f869d6c2c 100644 --- a/drivers/dma/ioat/dma_v3.c +++ b/drivers/dma/ioat/dma_v3.c @@ -740,7 +740,7 @@ ioat3_prep_xor(struct dma_chan *chan, dma_addr_t dest, dma_addr_t *src, return __ioat3_prep_xor_lock(chan, NULL, dest, src, src_cnt, len, flags); } -struct dma_async_tx_descriptor * +static struct dma_async_tx_descriptor * ioat3_prep_xor_val(struct dma_chan *chan, dma_addr_t *src, unsigned int src_cnt, size_t len, enum sum_check_flags *result, unsigned long flags) @@ -1091,7 +1091,7 @@ ioat3_prep_pq(struct dma_chan *chan, dma_addr_t *dst, dma_addr_t *src, } } -struct dma_async_tx_descriptor * +static struct dma_async_tx_descriptor * ioat3_prep_pq_val(struct dma_chan *chan, dma_addr_t *pq, dma_addr_t *src, unsigned int src_cnt, const unsigned char *scf, size_t len, enum sum_check_flags *pqres, unsigned long flags) @@ -1133,7 +1133,7 @@ ioat3_prep_pqxor(struct dma_chan *chan, dma_addr_t dst, dma_addr_t *src, flags); } -struct dma_async_tx_descriptor * +static struct dma_async_tx_descriptor * ioat3_prep_pqxor_val(struct dma_chan *chan, dma_addr_t *src, unsigned int src_cnt, size_t len, enum sum_check_flags *result, unsigned long flags) @@ -1655,7 +1655,6 @@ int ioat3_dma_probe(struct ioatdma_device *device, int dca) err = ioat_probe(device); if (err) return err; - ioat_set_tcp_copy_break(262144); list_for_each_entry(c, &dma->channels, device_node) { chan = to_chan_common(c); diff --git a/drivers/dma/iovlock.c b/drivers/dma/iovlock.c deleted file mode 100644 index bb48a57c2fc1..000000000000 --- a/drivers/dma/iovlock.c +++ /dev/null @@ -1,280 +0,0 @@ -/* - * Copyright(c) 2004 - 2006 Intel Corporation. All rights reserved. - * Portions based on net/core/datagram.c and copyrighted by their authors. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 59 - * Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * - * The full GNU General Public License is included in this distribution in the - * file called COPYING. - */ - -/* - * This code allows the net stack to make use of a DMA engine for - * skb to iovec copies. - */ - -#include <linux/dmaengine.h> -#include <linux/pagemap.h> -#include <linux/slab.h> -#include <net/tcp.h> /* for memcpy_toiovec */ -#include <asm/io.h> -#include <asm/uaccess.h> - -static int num_pages_spanned(struct iovec *iov) -{ - return - ((PAGE_ALIGN((unsigned long)iov->iov_base + iov->iov_len) - - ((unsigned long)iov->iov_base & PAGE_MASK)) >> PAGE_SHIFT); -} - -/* - * Pin down all the iovec pages needed for len bytes. - * Return a struct dma_pinned_list to keep track of pages pinned down. - * - * We are allocating a single chunk of memory, and then carving it up into - * 3 sections, the latter 2 whose size depends on the number of iovecs and the - * total number of pages, respectively. - */ -struct dma_pinned_list *dma_pin_iovec_pages(struct iovec *iov, size_t len) -{ - struct dma_pinned_list *local_list; - struct page **pages; - int i; - int ret; - int nr_iovecs = 0; - int iovec_len_used = 0; - int iovec_pages_used = 0; - - /* don't pin down non-user-based iovecs */ - if (segment_eq(get_fs(), KERNEL_DS)) - return NULL; - - /* determine how many iovecs/pages there are, up front */ - do { - iovec_len_used += iov[nr_iovecs].iov_len; - iovec_pages_used += num_pages_spanned(&iov[nr_iovecs]); - nr_iovecs++; - } while (iovec_len_used < len); - - /* single kmalloc for pinned list, page_list[], and the page arrays */ - local_list = kmalloc(sizeof(*local_list) - + (nr_iovecs * sizeof (struct dma_page_list)) - + (iovec_pages_used * sizeof (struct page*)), GFP_KERNEL); - if (!local_list) - goto out; - - /* list of pages starts right after the page list array */ - pages = (struct page **) &local_list->page_list[nr_iovecs]; - - local_list->nr_iovecs = 0; - - for (i = 0; i < nr_iovecs; i++) { - struct dma_page_list *page_list = &local_list->page_list[i]; - - len -= iov[i].iov_len; - - if (!access_ok(VERIFY_WRITE, iov[i].iov_base, iov[i].iov_len)) - goto unpin; - - page_list->nr_pages = num_pages_spanned(&iov[i]); - page_list->base_address = iov[i].iov_base; - - page_list->pages = pages; - pages += page_list->nr_pages; - - /* pin pages down */ - down_read(¤t->mm->mmap_sem); - ret = get_user_pages( - current, - current->mm, - (unsigned long) iov[i].iov_base, - page_list->nr_pages, - 1, /* write */ - 0, /* force */ - page_list->pages, - NULL); - up_read(¤t->mm->mmap_sem); - - if (ret != page_list->nr_pages) - goto unpin; - - local_list->nr_iovecs = i + 1; - } - - return local_list; - -unpin: - dma_unpin_iovec_pages(local_list); -out: - return NULL; -} - -void dma_unpin_iovec_pages(struct dma_pinned_list *pinned_list) -{ - int i, j; - - if (!pinned_list) - return; - - for (i = 0; i < pinned_list->nr_iovecs; i++) { - struct dma_page_list *page_list = &pinned_list->page_list[i]; - for (j = 0; j < page_list->nr_pages; j++) { - set_page_dirty_lock(page_list->pages[j]); - page_cache_release(page_list->pages[j]); - } - } - - kfree(pinned_list); -} - - -/* - * We have already pinned down the pages we will be using in the iovecs. - * Each entry in iov array has corresponding entry in pinned_list->page_list. - * Using array indexing to keep iov[] and page_list[] in sync. - * Initial elements in iov array's iov->iov_len will be 0 if already copied into - * by another call. - * iov array length remaining guaranteed to be bigger than len. - */ -dma_cookie_t dma_memcpy_to_iovec(struct dma_chan *chan, struct iovec *iov, - struct dma_pinned_list *pinned_list, unsigned char *kdata, size_t len) -{ - int iov_byte_offset; - int copy; - dma_cookie_t dma_cookie = 0; - int iovec_idx; - int page_idx; - - if (!chan) - return memcpy_toiovec(iov, kdata, len); - - iovec_idx = 0; - while (iovec_idx < pinned_list->nr_iovecs) { - struct dma_page_list *page_list; - - /* skip already used-up iovecs */ - while (!iov[iovec_idx].iov_len) - iovec_idx++; - - page_list = &pinned_list->page_list[iovec_idx]; - - iov_byte_offset = ((unsigned long)iov[iovec_idx].iov_base & ~PAGE_MASK); - page_idx = (((unsigned long)iov[iovec_idx].iov_base & PAGE_MASK) - - ((unsigned long)page_list->base_address & PAGE_MASK)) >> PAGE_SHIFT; - - /* break up copies to not cross page boundary */ - while (iov[iovec_idx].iov_len) { - copy = min_t(int, PAGE_SIZE - iov_byte_offset, len); - copy = min_t(int, copy, iov[iovec_idx].iov_len); - - dma_cookie = dma_async_memcpy_buf_to_pg(chan, - page_list->pages[page_idx], - iov_byte_offset, - kdata, - copy); - /* poll for a descriptor slot */ - if (unlikely(dma_cookie < 0)) { - dma_async_issue_pending(chan); - continue; - } - - len -= copy; - iov[iovec_idx].iov_len -= copy; - iov[iovec_idx].iov_base += copy; - - if (!len) - return dma_cookie; - - kdata += copy; - iov_byte_offset = 0; - page_idx++; - } - iovec_idx++; - } - - /* really bad if we ever run out of iovecs */ - BUG(); - return -EFAULT; -} - -dma_cookie_t dma_memcpy_pg_to_iovec(struct dma_chan *chan, struct iovec *iov, - struct dma_pinned_list *pinned_list, struct page *page, - unsigned int offset, size_t len) -{ - int iov_byte_offset; - int copy; - dma_cookie_t dma_cookie = 0; - int iovec_idx; - int page_idx; - int err; - - /* this needs as-yet-unimplemented buf-to-buff, so punt. */ - /* TODO: use dma for this */ - if (!chan || !pinned_list) { - u8 *vaddr = kmap(page); - err = memcpy_toiovec(iov, vaddr + offset, len); - kunmap(page); - return err; - } - - iovec_idx = 0; - while (iovec_idx < pinned_list->nr_iovecs) { - struct dma_page_list *page_list; - - /* skip already used-up iovecs */ - while (!iov[iovec_idx].iov_len) - iovec_idx++; - - page_list = &pinned_list->page_list[iovec_idx]; - - iov_byte_offset = ((unsigned long)iov[iovec_idx].iov_base & ~PAGE_MASK); - page_idx = (((unsigned long)iov[iovec_idx].iov_base & PAGE_MASK) - - ((unsigned long)page_list->base_address & PAGE_MASK)) >> PAGE_SHIFT; - - /* break up copies to not cross page boundary */ - while (iov[iovec_idx].iov_len) { - copy = min_t(int, PAGE_SIZE - iov_byte_offset, len); - copy = min_t(int, copy, iov[iovec_idx].iov_len); - - dma_cookie = dma_async_memcpy_pg_to_pg(chan, - page_list->pages[page_idx], - iov_byte_offset, - page, - offset, - copy); - /* poll for a descriptor slot */ - if (unlikely(dma_cookie < 0)) { - dma_async_issue_pending(chan); - continue; - } - - len -= copy; - iov[iovec_idx].iov_len -= copy; - iov[iovec_idx].iov_base += copy; - - if (!len) - return dma_cookie; - - offset += copy; - iov_byte_offset = 0; - page_idx++; - } - iovec_idx++; - } - - /* really bad if we ever run out of iovecs */ - BUG(); - return -EFAULT; -} diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c index 394cbc5c93e3..7938272f2edf 100644 --- a/drivers/dma/mv_xor.c +++ b/drivers/dma/mv_xor.c @@ -310,7 +310,8 @@ mv_xor_clean_slot(struct mv_xor_desc_slot *desc, return 0; } -static void __mv_xor_slot_cleanup(struct mv_xor_chan *mv_chan) +/* This function must be called with the mv_xor_chan spinlock held */ +static void mv_xor_slot_cleanup(struct mv_xor_chan *mv_chan) { struct mv_xor_desc_slot *iter, *_iter; dma_cookie_t cookie = 0; @@ -366,18 +367,13 @@ static void __mv_xor_slot_cleanup(struct mv_xor_chan *mv_chan) mv_chan->dmachan.completed_cookie = cookie; } -static void -mv_xor_slot_cleanup(struct mv_xor_chan *mv_chan) -{ - spin_lock_bh(&mv_chan->lock); - __mv_xor_slot_cleanup(mv_chan); - spin_unlock_bh(&mv_chan->lock); -} - static void mv_xor_tasklet(unsigned long data) { struct mv_xor_chan *chan = (struct mv_xor_chan *) data; + + spin_lock_bh(&chan->lock); mv_xor_slot_cleanup(chan); + spin_unlock_bh(&chan->lock); } static struct mv_xor_desc_slot * @@ -656,9 +652,10 @@ static void mv_xor_free_chan_resources(struct dma_chan *chan) struct mv_xor_desc_slot *iter, *_iter; int in_use_descs = 0; + spin_lock_bh(&mv_chan->lock); + mv_xor_slot_cleanup(mv_chan); - spin_lock_bh(&mv_chan->lock); list_for_each_entry_safe(iter, _iter, &mv_chan->chain, chain_node) { in_use_descs++; @@ -700,11 +697,12 @@ static enum dma_status mv_xor_status(struct dma_chan *chan, enum dma_status ret; ret = dma_cookie_status(chan, cookie, txstate); - if (ret == DMA_COMPLETE) { - mv_xor_clean_completed_slots(mv_chan); + if (ret == DMA_COMPLETE) return ret; - } + + spin_lock_bh(&mv_chan->lock); mv_xor_slot_cleanup(mv_chan); + spin_unlock_bh(&mv_chan->lock); return dma_cookie_status(chan, cookie, txstate); } @@ -782,7 +780,7 @@ static void mv_xor_issue_pending(struct dma_chan *chan) static int mv_xor_memcpy_self_test(struct mv_xor_chan *mv_chan) { - int i; + int i, ret; void *src, *dest; dma_addr_t src_dma, dest_dma; struct dma_chan *dma_chan; @@ -819,19 +817,44 @@ static int mv_xor_memcpy_self_test(struct mv_xor_chan *mv_chan) src_dma = dma_map_page(dma_chan->device->dev, virt_to_page(src), 0, PAGE_SIZE, DMA_TO_DEVICE); - unmap->to_cnt = 1; unmap->addr[0] = src_dma; + ret = dma_mapping_error(dma_chan->device->dev, src_dma); + if (ret) { + err = -ENOMEM; + goto free_resources; + } + unmap->to_cnt = 1; + dest_dma = dma_map_page(dma_chan->device->dev, virt_to_page(dest), 0, PAGE_SIZE, DMA_FROM_DEVICE); - unmap->from_cnt = 1; unmap->addr[1] = dest_dma; + ret = dma_mapping_error(dma_chan->device->dev, dest_dma); + if (ret) { + err = -ENOMEM; + goto free_resources; + } + unmap->from_cnt = 1; unmap->len = PAGE_SIZE; tx = mv_xor_prep_dma_memcpy(dma_chan, dest_dma, src_dma, PAGE_SIZE, 0); + if (!tx) { + dev_err(dma_chan->device->dev, + "Self-test cannot prepare operation, disabling\n"); + err = -ENODEV; + goto free_resources; + } + cookie = mv_xor_tx_submit(tx); + if (dma_submit_error(cookie)) { + dev_err(dma_chan->device->dev, + "Self-test submit error, disabling\n"); + err = -ENODEV; + goto free_resources; + } + mv_xor_issue_pending(dma_chan); async_tx_ack(tx); msleep(1); @@ -866,7 +889,7 @@ out: static int mv_xor_xor_self_test(struct mv_xor_chan *mv_chan) { - int i, src_idx; + int i, src_idx, ret; struct page *dest; struct page *xor_srcs[MV_XOR_NUM_SRC_TEST]; dma_addr_t dma_srcs[MV_XOR_NUM_SRC_TEST]; @@ -929,19 +952,42 @@ mv_xor_xor_self_test(struct mv_xor_chan *mv_chan) unmap->addr[i] = dma_map_page(dma_chan->device->dev, xor_srcs[i], 0, PAGE_SIZE, DMA_TO_DEVICE); dma_srcs[i] = unmap->addr[i]; + ret = dma_mapping_error(dma_chan->device->dev, unmap->addr[i]); + if (ret) { + err = -ENOMEM; + goto free_resources; + } unmap->to_cnt++; } unmap->addr[src_count] = dma_map_page(dma_chan->device->dev, dest, 0, PAGE_SIZE, DMA_FROM_DEVICE); dest_dma = unmap->addr[src_count]; + ret = dma_mapping_error(dma_chan->device->dev, unmap->addr[src_count]); + if (ret) { + err = -ENOMEM; + goto free_resources; + } unmap->from_cnt = 1; unmap->len = PAGE_SIZE; tx = mv_xor_prep_dma_xor(dma_chan, dest_dma, dma_srcs, src_count, PAGE_SIZE, 0); + if (!tx) { + dev_err(dma_chan->device->dev, + "Self-test cannot prepare operation, disabling\n"); + err = -ENODEV; + goto free_resources; + } cookie = mv_xor_tx_submit(tx); + if (dma_submit_error(cookie)) { + dev_err(dma_chan->device->dev, + "Self-test submit error, disabling\n"); + err = -ENODEV; + goto free_resources; + } + mv_xor_issue_pending(dma_chan); async_tx_ack(tx); msleep(8); diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index 1f9e642c66ad..212c5b9ac106 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -900,18 +900,6 @@ static inline void dmaengine_put(void) } #endif -#ifdef CONFIG_NET_DMA -#define net_dmaengine_get() dmaengine_get() -#define net_dmaengine_put() dmaengine_put() -#else -static inline void net_dmaengine_get(void) -{ -} -static inline void net_dmaengine_put(void) -{ -} -#endif - #ifdef CONFIG_ASYNC_TX_DMA #define async_dmaengine_get() dmaengine_get() #define async_dmaengine_put() dmaengine_put() @@ -933,16 +921,8 @@ async_dma_find_channel(enum dma_transaction_type type) return NULL; } #endif /* CONFIG_ASYNC_TX_DMA */ - -dma_cookie_t dma_async_memcpy_buf_to_buf(struct dma_chan *chan, - void *dest, void *src, size_t len); -dma_cookie_t dma_async_memcpy_buf_to_pg(struct dma_chan *chan, - struct page *page, unsigned int offset, void *kdata, size_t len); -dma_cookie_t dma_async_memcpy_pg_to_pg(struct dma_chan *chan, - struct page *dest_pg, unsigned int dest_off, struct page *src_pg, - unsigned int src_off, size_t len); void dma_async_tx_descriptor_init(struct dma_async_tx_descriptor *tx, - struct dma_chan *chan); + struct dma_chan *chan); static inline void async_tx_ack(struct dma_async_tx_descriptor *tx) { diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index abde271c18ae..a17ba0881afb 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -28,7 +28,6 @@ #include <linux/textsearch.h> #include <net/checksum.h> #include <linux/rcupdate.h> -#include <linux/dmaengine.h> #include <linux/hrtimer.h> #include <linux/dma-mapping.h> #include <linux/netdev_features.h> @@ -581,11 +580,8 @@ struct sk_buff { /* 2/4 bit hole (depending on ndisc_nodetype presence) */ kmemcheck_bitfield_end(flags2); -#if defined CONFIG_NET_DMA || defined CONFIG_NET_RX_BUSY_POLL - union { - unsigned int napi_id; - dma_cookie_t dma_cookie; - }; +#ifdef CONFIG_NET_RX_BUSY_POLL + unsigned int napi_id; #endif #ifdef CONFIG_NETWORK_SECMARK __u32 secmark; diff --git a/include/linux/tcp.h b/include/linux/tcp.h index fa5258f322e7..ac82c5ea955b 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h @@ -19,7 +19,6 @@ #include <linux/skbuff.h> -#include <linux/dmaengine.h> #include <net/sock.h> #include <net/inet_connection_sock.h> #include <net/inet_timewait_sock.h> @@ -166,13 +165,6 @@ struct tcp_sock { struct iovec *iov; int memory; int len; -#ifdef CONFIG_NET_DMA - /* members for async copy */ - struct dma_chan *dma_chan; - int wakeup; - struct dma_pinned_list *pinned_list; - dma_cookie_t dma_cookie; -#endif } ucopy; u32 snd_wl1; /* Sequence for window update */ diff --git a/include/net/netdma.h b/include/net/netdma.h deleted file mode 100644 index 8ba8ce284eeb..000000000000 --- a/include/net/netdma.h +++ /dev/null @@ -1,32 +0,0 @@ -/* - * Copyright(c) 2004 - 2006 Intel Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 59 - * Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * - * The full GNU General Public License is included in this distribution in the - * file called COPYING. - */ -#ifndef NETDMA_H -#define NETDMA_H -#ifdef CONFIG_NET_DMA -#include <linux/dmaengine.h> -#include <linux/skbuff.h> - -int dma_skb_copy_datagram_iovec(struct dma_chan* chan, - struct sk_buff *skb, int offset, struct iovec *to, - size_t len, struct dma_pinned_list *pinned_list); - -#endif /* CONFIG_NET_DMA */ -#endif /* NETDMA_H */ diff --git a/include/net/sock.h b/include/net/sock.h index b9a5bd0ed9f3..591e607cca35 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -233,7 +233,6 @@ struct cg_proto; * @sk_receive_queue: incoming packets * @sk_wmem_alloc: transmit queue bytes committed * @sk_write_queue: Packet sending queue - * @sk_async_wait_queue: DMA copied packets * @sk_omem_alloc: "o" is "option" or "other" * @sk_wmem_queued: persistent queue size * @sk_forward_alloc: space allocated forward @@ -362,10 +361,6 @@ struct sock { struct sk_filter __rcu *sk_filter; struct socket_wq __rcu *sk_wq; -#ifdef CONFIG_NET_DMA - struct sk_buff_head sk_async_wait_queue; -#endif - #ifdef CONFIG_XFRM struct xfrm_policy *sk_policy[2]; #endif @@ -2206,27 +2201,15 @@ void sock_tx_timestamp(const struct sock *sk, __u8 *tx_flags); * sk_eat_skb - Release a skb if it is no longer needed * @sk: socket to eat this skb from * @skb: socket buffer to eat - * @copied_early: flag indicating whether DMA operations copied this data early * * This routine must be called with interrupts disabled or with the socket * locked so that the sk_buff queue operation is ok. */ -#ifdef CONFIG_NET_DMA -static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, bool copied_early) -{ - __skb_unlink(skb, &sk->sk_receive_queue); - if (!copied_early) - __kfree_skb(skb); - else - __skb_queue_tail(&sk->sk_async_wait_queue, skb); -} -#else -static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, bool copied_early) +static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb) { __skb_unlink(skb, &sk->sk_receive_queue); __kfree_skb(skb); } -#endif static inline struct net *sock_net(const struct sock *sk) diff --git a/include/net/tcp.h b/include/net/tcp.h index 590e01a476ac..7523c325673e 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -27,7 +27,6 @@ #include <linux/cache.h> #include <linux/percpu.h> #include <linux/skbuff.h> -#include <linux/dmaengine.h> #include <linux/crypto.h> #include <linux/cryptohash.h> #include <linux/kref.h> @@ -262,7 +261,6 @@ extern int sysctl_tcp_adv_win_scale; extern int sysctl_tcp_tw_reuse; extern int sysctl_tcp_frto; extern int sysctl_tcp_low_latency; -extern int sysctl_tcp_dma_copybreak; extern int sysctl_tcp_nometrics_save; extern int sysctl_tcp_moderate_rcvbuf; extern int sysctl_tcp_tso_win_divisor; @@ -368,7 +366,6 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb, void tcp_rcv_established(struct sock *sk, struct sk_buff *skb, const struct tcphdr *th, unsigned int len); void tcp_rcv_space_adjust(struct sock *sk); -void tcp_cleanup_rbuf(struct sock *sk, int copied); int tcp_twsk_unique(struct sock *sk, struct sock *sktw, void *twp); void tcp_twsk_destructor(struct sock *sk); ssize_t tcp_splice_read(struct socket *sk, loff_t *ppos, @@ -1031,12 +1028,6 @@ static inline void tcp_prequeue_init(struct tcp_sock *tp) tp->ucopy.len = 0; tp->ucopy.memory = 0; skb_queue_head_init(&tp->ucopy.prequeue); -#ifdef CONFIG_NET_DMA - tp->ucopy.dma_chan = NULL; - tp->ucopy.wakeup = 0; - tp->ucopy.pinned_list = NULL; - tp->ucopy.dma_cookie = 0; -#endif } bool tcp_prequeue(struct sock *sk, struct sk_buff *skb); diff --git a/kernel/sysctl_binary.c b/kernel/sysctl_binary.c index e4ba9a5a5ccb..9a4f750a2963 100644 --- a/kernel/sysctl_binary.c +++ b/kernel/sysctl_binary.c @@ -390,7 +390,6 @@ static const struct bin_table bin_net_ipv4_table[] = { { CTL_INT, NET_TCP_MTU_PROBING, "tcp_mtu_probing" }, { CTL_INT, NET_TCP_BASE_MSS, "tcp_base_mss" }, { CTL_INT, NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS, "tcp_workaround_signed_windows" }, - { CTL_INT, NET_TCP_DMA_COPYBREAK, "tcp_dma_copybreak" }, { CTL_INT, NET_TCP_SLOW_START_AFTER_IDLE, "tcp_slow_start_after_idle" }, { CTL_INT, NET_CIPSOV4_CACHE_ENABLE, "cipso_cache_enable" }, { CTL_INT, NET_CIPSOV4_CACHE_BUCKET_SIZE, "cipso_cache_bucket_size" }, diff --git a/net/core/Makefile b/net/core/Makefile index 71093d94ad2b..235e6c50708d 100644 --- a/net/core/Makefile +++ b/net/core/Makefile @@ -16,7 +16,6 @@ obj-y += net-sysfs.o obj-$(CONFIG_PROC_FS) += net-procfs.o obj-$(CONFIG_NET_PKTGEN) += pktgen.o obj-$(CONFIG_NETPOLL) += netpoll.o -obj-$(CONFIG_NET_DMA) += user_dma.o obj-$(CONFIG_FIB_RULES) += fib_rules.o obj-$(CONFIG_TRACEPOINTS) += net-traces.o obj-$(CONFIG_NET_DROP_MONITOR) += drop_monitor.o diff --git a/net/core/dev.c b/net/core/dev.c index cf8a95f48cff..130d64220229 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1284,7 +1284,6 @@ static int __dev_open(struct net_device *dev) clear_bit(__LINK_STATE_START, &dev->state); else { dev->flags |= IFF_UP; - net_dmaengine_get(); dev_set_rx_mode(dev); dev_activate(dev); add_device_randomness(dev->dev_addr, dev->addr_len); @@ -1363,7 +1362,6 @@ static int __dev_close_many(struct list_head *head) ops->ndo_stop(dev); dev->flags &= ~IFF_UP; - net_dmaengine_put(); netpoll_poll_enable(dev); } @@ -4505,14 +4503,6 @@ static void net_rx_action(struct softirq_action *h) out: net_rps_action_and_irq_enable(sd); -#ifdef CONFIG_NET_DMA - /* - * There may not be any more sk_buffs coming right now, so push - * any pending DMA copies to hardware - */ - dma_issue_pending_all(); -#endif - return; softnet_break: diff --git a/net/core/sock.c b/net/core/sock.c index 9c3f823e76a9..611f424fb76b 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1489,9 +1489,6 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority) atomic_set(&newsk->sk_omem_alloc, 0); skb_queue_head_init(&newsk->sk_receive_queue); skb_queue_head_init(&newsk->sk_write_queue); -#ifdef CONFIG_NET_DMA - skb_queue_head_init(&newsk->sk_async_wait_queue); -#endif spin_lock_init(&newsk->sk_dst_lock); rwlock_init(&newsk->sk_callback_lock); @@ -2308,9 +2305,6 @@ void sock_init_data(struct socket *sock, struct sock *sk) skb_queue_head_init(&sk->sk_receive_queue); skb_queue_head_init(&sk->sk_write_queue); skb_queue_head_init(&sk->sk_error_queue); -#ifdef CONFIG_NET_DMA - skb_queue_head_init(&sk->sk_async_wait_queue); -#endif sk->sk_send_head = NULL; diff --git a/net/core/user_dma.c b/net/core/user_dma.c deleted file mode 100644 index 1b5fefdb8198..000000000000 --- a/net/core/user_dma.c +++ /dev/null @@ -1,131 +0,0 @@ -/* - * Copyright(c) 2004 - 2006 Intel Corporation. All rights reserved. - * Portions based on net/core/datagram.c and copyrighted by their authors. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 59 - * Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * - * The full GNU General Public License is included in this distribution in the - * file called COPYING. - */ - -/* - * This code allows the net stack to make use of a DMA engine for - * skb to iovec copies. - */ - -#include <linux/dmaengine.h> -#include <linux/socket.h> -#include <linux/export.h> -#include <net/tcp.h> -#include <net/netdma.h> - -#define NET_DMA_DEFAULT_COPYBREAK 4096 - -int sysctl_tcp_dma_copybreak = NET_DMA_DEFAULT_COPYBREAK; -EXPORT_SYMBOL(sysctl_tcp_dma_copybreak); - -/** - * dma_skb_copy_datagram_iovec - Copy a datagram to an iovec. - * @skb - buffer to copy - * @offset - offset in the buffer to start copying from - * @iovec - io vector to copy to - * @len - amount of data to copy from buffer to iovec - * @pinned_list - locked iovec buffer data - * - * Note: the iovec is modified during the copy. - */ -int dma_skb_copy_datagram_iovec(struct dma_chan *chan, - struct sk_buff *skb, int offset, struct iovec *to, - size_t len, struct dma_pinned_list *pinned_list) -{ - int start = skb_headlen(skb); - int i, copy = start - offset; - struct sk_buff *frag_iter; - dma_cookie_t cookie = 0; - - /* Copy header. */ - if (copy > 0) { - if (copy > len) - copy = len; - cookie = dma_memcpy_to_iovec(chan, to, pinned_list, - skb->data + offset, copy); - if (cookie < 0) - goto fault; - len -= copy; - if (len == 0) - goto end; - offset += copy; - } - - /* Copy paged appendix. Hmm... why does this look so complicated? */ - for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { - int end; - const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; - - WARN_ON(start > offset + len); - - end = start + skb_frag_size(frag); - copy = end - offset; - if (copy > 0) { - struct page *page = skb_frag_page(frag); - - if (copy > len) - copy = len; - - cookie = dma_memcpy_pg_to_iovec(chan, to, pinned_list, page, - frag->page_offset + offset - start, copy); - if (cookie < 0) - goto fault; - len -= copy; - if (len == 0) - goto end; - offset += copy; - } - start = end; - } - - skb_walk_frags(skb, frag_iter) { - int end; - - WARN_ON(start > offset + len); - - end = start + frag_iter->len; - copy = end - offset; - if (copy > 0) { - if (copy > len) - copy = len; - cookie = dma_skb_copy_datagram_iovec(chan, frag_iter, - offset - start, - to, copy, - pinned_list); - if (cookie < 0) - goto fault; - len -= copy; - if (len == 0) - goto end; - offset += copy; - } - start = end; - } - -end: - if (!len) { - skb->dma_cookie = cookie; - return cookie; - } - -fault: - return -EFAULT; -} diff --git a/net/dccp/proto.c b/net/dccp/proto.c index de2c1e719305..f440cc7c9f72 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -848,7 +848,7 @@ int dccp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, default: dccp_pr_debug("packet_type=%s\n", dccp_packet_name(dh->dccph_type)); - sk_eat_skb(sk, skb, false); + sk_eat_skb(sk, skb); } verify_sock_status: if (sock_flag(sk, SOCK_DONE)) { @@ -905,7 +905,7 @@ verify_sock_status: len = skb->len; found_fin_ok: if (!(flags & MSG_PEEK)) - sk_eat_skb(sk, skb, false); + sk_eat_skb(sk, skb); break; } while (1); out: diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c index 79a007c52558..a9fde0eef77c 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -628,15 +628,6 @@ static struct ctl_table ipv4_table[] = { .mode = 0644, .proc_handler = proc_dointvec }, -#ifdef CONFIG_NET_DMA - { - .procname = "tcp_dma_copybreak", - .data = &sysctl_tcp_dma_copybreak, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = proc_dointvec - }, -#endif { .procname = "tcp_slow_start_after_idle", .data = &sysctl_tcp_slow_start_after_idle, diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 541f26a67ba2..8ee43ae90396 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -274,7 +274,6 @@ #include <net/tcp.h> #include <net/xfrm.h> #include <net/ip.h> -#include <net/netdma.h> #include <net/sock.h> #include <asm/uaccess.h> @@ -1394,7 +1393,7 @@ static int tcp_peek_sndq(struct sock *sk, struct msghdr *msg, int len) * calculation of whether or not we must ACK for the sake of * a window update. */ -void tcp_cleanup_rbuf(struct sock *sk, int copied) +static void tcp_cleanup_rbuf(struct sock *sk, int copied) { struct tcp_sock *tp = tcp_sk(sk); bool time_to_ack = false; @@ -1470,39 +1469,6 @@ static void tcp_prequeue_process(struct sock *sk) tp->ucopy.memory = 0; } -#ifdef CONFIG_NET_DMA -static void tcp_service_net_dma(struct sock *sk, bool wait) -{ - dma_cookie_t done, used; - dma_cookie_t last_issued; - struct tcp_sock *tp = tcp_sk(sk); - - if (!tp->ucopy.dma_chan) - return; - - last_issued = tp->ucopy.dma_cookie; - dma_async_issue_pending(tp->ucopy.dma_chan); - - do { - if (dma_async_is_tx_complete(tp->ucopy.dma_chan, - last_issued, &done, - &used) == DMA_COMPLETE) { - /* Safe to free early-copied skbs now */ - __skb_queue_purge(&sk->sk_async_wait_queue); - break; - } else { - struct sk_buff *skb; - while ((skb = skb_peek(&sk->sk_async_wait_queue)) && - (dma_async_is_complete(skb->dma_cookie, done, - used) == DMA_COMPLETE)) { - __skb_dequeue(&sk->sk_async_wait_queue); - kfree_skb(skb); - } - } - } while (wait); -} -#endif - static struct sk_buff *tcp_recv_skb(struct sock *sk, u32 seq, u32 *off) { struct sk_buff *skb; @@ -1520,7 +1486,7 @@ static struct sk_buff *tcp_recv_skb(struct sock *sk, u32 seq, u32 *off) * splitted a fat GRO packet, while we released socket lock * in skb_splice_bits() */ - sk_eat_skb(sk, skb, false); + sk_eat_skb(sk, skb); } return NULL; } @@ -1586,11 +1552,11 @@ int tcp_read_sock(struct sock *sk, read_descriptor_t *desc, continue; } if (tcp_hdr(skb)->fin) { - sk_eat_skb(sk, skb, false); + sk_eat_skb(sk, skb); ++seq; break; } - sk_eat_skb(sk, skb, false); + sk_eat_skb(sk, skb); if (!desc->count) break; tp->copied_seq = seq; @@ -1628,7 +1594,6 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, int target; /* Read at least this many bytes */ long timeo; struct task_struct *user_recv = NULL; - bool copied_early = false; struct sk_buff *skb; u32 urg_hole = 0; @@ -1674,28 +1639,6 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, target = sock_rcvlowat(sk, flags & MSG_WAITALL, len); -#ifdef CONFIG_NET_DMA - tp->ucopy.dma_chan = NULL; - preempt_disable(); - skb = skb_peek_tail(&sk->sk_receive_queue); - { - int available = 0; - - if (skb) - available = TCP_SKB_CB(skb)->seq + skb->len - (*seq); - if ((available < target) && - (len > sysctl_tcp_dma_copybreak) && !(flags & MSG_PEEK) && - !sysctl_tcp_low_latency && - net_dma_find_channel()) { - preempt_enable(); - tp->ucopy.pinned_list = - dma_pin_iovec_pages(msg->msg_iov, len); - } else { - preempt_enable(); - } - } -#endif - do { u32 offset; @@ -1826,16 +1769,6 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, /* __ Set realtime policy in scheduler __ */ } -#ifdef CONFIG_NET_DMA - if (tp->ucopy.dma_chan) { - if (tp->rcv_wnd == 0 && - !skb_queue_empty(&sk->sk_async_wait_queue)) { - tcp_service_net_dma(sk, true); - tcp_cleanup_rbuf(sk, copied); - } else - dma_async_issue_pending(tp->ucopy.dma_chan); - } -#endif if (copied >= target) { /* Do not sleep, just process backlog. */ release_sock(sk); @@ -1843,11 +1776,6 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, } else sk_wait_data(sk, &timeo); -#ifdef CONFIG_NET_DMA - tcp_service_net_dma(sk, false); /* Don't block */ - tp->ucopy.wakeup = 0; -#endif - if (user_recv) { int chunk; @@ -1905,43 +1833,13 @@ do_prequeue: } if (!(flags & MSG_TRUNC)) { -#ifdef CONFIG_NET_DMA - if (!tp->ucopy.dma_chan && tp->ucopy.pinned_list) - tp->ucopy.dma_chan = net_dma_find_channel(); - - if (tp->ucopy.dma_chan) { - tp->ucopy.dma_cookie = dma_skb_copy_datagram_iovec( - tp->ucopy.dma_chan, skb, offset, - msg->msg_iov, used, - tp->ucopy.pinned_list); - - if (tp->ucopy.dma_cookie < 0) { - - pr_alert("%s: dma_cookie < 0\n", - __func__); - - /* Exception. Bailout! */ - if (!copied) - copied = -EFAULT; - break; - } - - dma_async_issue_pending(tp->ucopy.dma_chan); - - if ((offset + used) == skb->len) - copied_early = true; - - } else -#endif - { - err = skb_copy_datagram_iovec(skb, offset, - msg->msg_iov, used); - if (err) { - /* Exception. Bailout! */ - if (!copied) - copied = -EFAULT; - break; - } + err = skb_copy_datagram_iovec(skb, offset, + msg->msg_iov, used); + if (err) { + /* Exception. Bailout! */ + if (!copied) + copied = -EFAULT; + break; } } @@ -1961,19 +1859,15 @@ skip_copy: if (tcp_hdr(skb)->fin) goto found_fin_ok; - if (!(flags & MSG_PEEK)) { - sk_eat_skb(sk, skb, copied_early); - copied_early = false; - } + if (!(flags & MSG_PEEK)) + sk_eat_skb(sk, skb); continue; found_fin_ok: /* Process the FIN. */ ++*seq; - if (!(flags & MSG_PEEK)) { - sk_eat_skb(sk, skb, copied_early); - copied_early = false; - } + if (!(flags & MSG_PEEK)) + sk_eat_skb(sk, skb); break; } while (len > 0); @@ -1996,16 +1890,6 @@ skip_copy: tp->ucopy.len = 0; } -#ifdef CONFIG_NET_DMA - tcp_service_net_dma(sk, true); /* Wait for queue to drain */ - tp->ucopy.dma_chan = NULL; - - if (tp->ucopy.pinned_list) { - dma_unpin_iovec_pages(tp->ucopy.pinned_list); - tp->ucopy.pinned_list = NULL; - } -#endif - /* According to UNIX98, msg_name/msg_namelen are ignored * on connected socket. I was just happy when found this 8) --ANK */ @@ -2349,9 +2233,6 @@ int tcp_disconnect(struct sock *sk, int flags) __skb_queue_purge(&sk->sk_receive_queue); tcp_write_queue_purge(sk); __skb_queue_purge(&tp->out_of_order_queue); -#ifdef CONFIG_NET_DMA - __skb_queue_purge(&sk->sk_async_wait_queue); -#endif inet->inet_dport = 0; diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index a906e0200ff2..0185eea59342 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -73,7 +73,6 @@ #include <net/inet_common.h> #include <linux/ipsec.h> #include <asm/unaligned.h> -#include <net/netdma.h> #include <linux/errqueue.h> int sysctl_tcp_timestamps __read_mostly = 1; @@ -4951,53 +4950,6 @@ static inline bool tcp_checksum_complete_user(struct sock *sk, __tcp_checksum_complete_user(sk, skb); } -#ifdef CONFIG_NET_DMA -static bool tcp_dma_try_early_copy(struct sock *sk, struct sk_buff *skb, - int hlen) -{ - struct tcp_sock *tp = tcp_sk(sk); - int chunk = skb->len - hlen; - int dma_cookie; - bool copied_early = false; - - if (tp->ucopy.wakeup) - return false; - - if (!tp->ucopy.dma_chan && tp->ucopy.pinned_list) - tp->ucopy.dma_chan = net_dma_find_channel(); - - if (tp->ucopy.dma_chan && skb_csum_unnecessary(skb)) { - - dma_cookie = dma_skb_copy_datagram_iovec(tp->ucopy.dma_chan, - skb, hlen, - tp->ucopy.iov, chunk, - tp->ucopy.pinned_list); - - if (dma_cookie < 0) - goto out; - - tp->ucopy.dma_cookie = dma_cookie; - copied_early = true; - - tp->ucopy.len -= chunk; - tp->copied_seq += chunk; - tcp_rcv_space_adjust(sk); - - if ((tp->ucopy.len == 0) || - (tcp_flag_word(tcp_hdr(skb)) & TCP_FLAG_PSH) || - (atomic_read(&sk->sk_rmem_alloc) > (sk->sk_rcvbuf >> 1))) { - tp->ucopy.wakeup = 1; - sk->sk_data_ready(sk); - } - } else if (chunk > 0) { - tp->ucopy.wakeup = 1; - sk->sk_data_ready(sk); - } -out: - return copied_early; -} -#endif /* CONFIG_NET_DMA */ - /* Does PAWS and seqno based validation of an incoming segment, flags will * play significant role here. */ @@ -5177,27 +5129,15 @@ void tcp_rcv_established(struct sock *sk, struct sk_buff *skb, } } else { int eaten = 0; - int copied_early = 0; bool fragstolen = false; - if (tp->copied_seq == tp->rcv_nxt && - len - tcp_header_len <= tp->ucopy.len) { -#ifdef CONFIG_NET_DMA - if (tp->ucopy.task == current && - sock_owned_by_user(sk) && - tcp_dma_try_early_copy(sk, skb, tcp_header_len)) { - copied_early = 1; - eaten = 1; - } -#endif - if (tp->ucopy.task == current && - sock_owned_by_user(sk) && !copied_early) { - __set_current_state(TASK_RUNNING); + if (tp->ucopy.task == current && + tp->copied_seq == tp->rcv_nxt && + len - tcp_header_len <= tp->ucopy.len && + sock_owned_by_user(sk)) { + __set_current_state(TASK_RUNNING); - if (!tcp_copy_to_iovec(sk, skb, tcp_header_len)) - eaten = 1; - } - if (eaten) { + if (!tcp_copy_to_iovec(sk, skb, tcp_header_len)) { /* Predicted packet is in window by definition. * seq == rcv_nxt and rcv_wup <= rcv_nxt. * Hence, check seq<=rcv_wup reduces to: @@ -5213,9 +5153,8 @@ void tcp_rcv_established(struct sock *sk, struct sk_buff *skb, __skb_pull(skb, tcp_header_len); tp->rcv_nxt = TCP_SKB_CB(skb)->end_seq; NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPHPHITSTOUSER); + eaten = 1; } - if (copied_early) - tcp_cleanup_rbuf(sk, skb->len); } if (!eaten) { if (tcp_checksum_complete_user(sk, skb)) @@ -5252,14 +5191,8 @@ void tcp_rcv_established(struct sock *sk, struct sk_buff *skb, goto no_ack; } - if (!copied_early || tp->rcv_nxt != tp->rcv_wup) - __tcp_ack_snd_check(sk, 0); + __tcp_ack_snd_check(sk, 0); no_ack: -#ifdef CONFIG_NET_DMA - if (copied_early) - __skb_queue_tail(&sk->sk_async_wait_queue, skb); - else -#endif if (eaten) kfree_skb_partial(skb, fragstolen); sk->sk_data_ready(sk); diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index cd17f009aede..fbea536cf5c0 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -72,7 +72,6 @@ #include <net/inet_common.h> #include <net/timewait_sock.h> #include <net/xfrm.h> -#include <net/netdma.h> #include <net/secure_seq.h> #include <net/tcp_memcontrol.h> #include <net/busy_poll.h> @@ -1670,18 +1669,8 @@ process: bh_lock_sock_nested(sk); ret = 0; if (!sock_owned_by_user(sk)) { -#ifdef CONFIG_NET_DMA - struct tcp_sock *tp = tcp_sk(sk); - if (!tp->ucopy.dma_chan && tp->ucopy.pinned_list) - tp->ucopy.dma_chan = net_dma_find_channel(); - if (tp->ucopy.dma_chan) + if (!tcp_prequeue(sk, skb)) ret = tcp_v4_do_rcv(sk, skb); - else -#endif - { - if (!tcp_prequeue(sk, skb)) - ret = tcp_v4_do_rcv(sk, skb); - } } else if (unlikely(sk_add_backlog(sk, skb, sk->sk_rcvbuf + sk->sk_sndbuf))) { bh_unlock_sock(sk); @@ -1841,11 +1830,6 @@ void tcp_v4_destroy_sock(struct sock *sk) } #endif -#ifdef CONFIG_NET_DMA - /* Cleans up our sk_async_wait_queue */ - __skb_queue_purge(&sk->sk_async_wait_queue); -#endif - /* Clean prequeue, it must be empty really */ __skb_queue_purge(&tp->ucopy.prequeue); diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 29964c3d363c..03a5d1ed3340 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -59,7 +59,6 @@ #include <net/snmp.h> #include <net/dsfield.h> #include <net/timewait_sock.h> -#include <net/netdma.h> #include <net/inet_common.h> #include <net/secure_seq.h> #include <net/tcp_memcontrol.h> @@ -1446,18 +1445,8 @@ process: bh_lock_sock_nested(sk); ret = 0; if (!sock_owned_by_user(sk)) { -#ifdef CONFIG_NET_DMA - struct tcp_sock *tp = tcp_sk(sk); - if (!tp->ucopy.dma_chan && tp->ucopy.pinned_list) - tp->ucopy.dma_chan = net_dma_find_channel(); - if (tp->ucopy.dma_chan) + if (!tcp_prequeue(sk, skb)) ret = tcp_v6_do_rcv(sk, skb); - else -#endif - { - if (!tcp_prequeue(sk, skb)) - ret = tcp_v6_do_rcv(sk, skb); - } } else if (unlikely(sk_add_backlog(sk, skb, sk->sk_rcvbuf + sk->sk_sndbuf))) { bh_unlock_sock(sk); diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c index 0080d2b0a8ae..bb9cbc17d926 100644 --- a/net/llc/af_llc.c +++ b/net/llc/af_llc.c @@ -839,7 +839,7 @@ static int llc_ui_recvmsg(struct kiocb *iocb, struct socket *sock, if (!(flags & MSG_PEEK)) { spin_lock_irqsave(&sk->sk_receive_queue.lock, cpu_flags); - sk_eat_skb(sk, skb, false); + sk_eat_skb(sk, skb); spin_unlock_irqrestore(&sk->sk_receive_queue.lock, cpu_flags); *seq = 0; } @@ -861,10 +861,10 @@ copy_uaddr: llc_cmsg_rcv(msg, skb); if (!(flags & MSG_PEEK)) { - spin_lock_irqsave(&sk->sk_receive_queue.lock, cpu_flags); - sk_eat_skb(sk, skb, false); - spin_unlock_irqrestore(&sk->sk_receive_queue.lock, cpu_flags); - *seq = 0; + spin_lock_irqsave(&sk->sk_receive_queue.lock, cpu_flags); + sk_eat_skb(sk, skb); + spin_unlock_irqrestore(&sk->sk_receive_queue.lock, cpu_flags); + *seq = 0; } goto out; |