779 lines
24 KiB
Diff
779 lines
24 KiB
Diff
From 2c58080407554e1bac8fd50d23cb02420524caed Mon Sep 17 00:00:00 2001
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From: Felix Fietkau <nbd@nbd.name>
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Date: Mon, 12 Aug 2013 12:50:22 +0200
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Subject: [PATCH] MIPS: partially inline dma ops
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Several DMA ops are no-op on many platforms, and the indirection through
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the mips_dma_map_ops function table is causing the compiler to emit
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unnecessary code.
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Inlining visibly improves network performance in my tests (on a 24Kc
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based system), and also slightly reduces code size of a few drivers.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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arch/mips/Kconfig | 4 +
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arch/mips/include/asm/dma-mapping.h | 360 +++++++++++++++++++++++++++++++++++-
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arch/mips/mm/dma-default.c | 163 ++--------------
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3 files changed, 373 insertions(+), 154 deletions(-)
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--- a/arch/mips/Kconfig
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+++ b/arch/mips/Kconfig
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@@ -1618,6 +1618,7 @@ config CPU_CAVIUM_OCTEON
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select USB_EHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
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select USB_OHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
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select MIPS_L1_CACHE_SHIFT_7
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+ select SYS_HAS_DMA_OPS
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help
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The Cavium Octeon processor is a highly integrated chip containing
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many ethernet hardware widgets for networking tasks. The processor
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@@ -1913,6 +1914,9 @@ config MIPS_MALTA_PM
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bool
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default y
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+config SYS_HAS_DMA_OPS
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+ bool
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+
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#
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# CPU may reorder R->R, R->W, W->R, W->W
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# Reordering beyond LL and SC is handled in WEAK_REORDERING_BEYOND_LLSC
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--- a/arch/mips/include/asm/dma-mapping.h
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+++ b/arch/mips/include/asm/dma-mapping.h
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@@ -1,9 +1,16 @@
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#ifndef _ASM_DMA_MAPPING_H
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#define _ASM_DMA_MAPPING_H
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+#include <linux/kmemcheck.h>
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+#include <linux/bug.h>
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#include <linux/scatterlist.h>
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+#include <linux/dma-debug.h>
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+#include <linux/dma-attrs.h>
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+
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#include <asm/dma-coherence.h>
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#include <asm/cache.h>
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+#include <asm/cpu-type.h>
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+#include <asm-generic/dma-coherent.h>
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#ifndef CONFIG_SGI_IP27 /* Kludge to fix 2.6.39 build for IP27 */
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#include <dma-coherence.h>
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@@ -11,12 +18,53 @@
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extern struct dma_map_ops *mips_dma_map_ops;
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+void __dma_sync(struct page *page, unsigned long offset, size_t size,
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+ enum dma_data_direction direction);
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+void *mips_dma_alloc_coherent(struct device *dev, size_t size,
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+ dma_addr_t *dma_handle, gfp_t gfp,
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+ struct dma_attrs *attrs);
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+void mips_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
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+ dma_addr_t dma_handle, struct dma_attrs *attrs);
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+
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static inline struct dma_map_ops *get_dma_ops(struct device *dev)
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{
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+#ifdef CONFIG_SYS_HAS_DMA_OPS
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if (dev && dev->archdata.dma_ops)
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return dev->archdata.dma_ops;
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else
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return mips_dma_map_ops;
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+#else
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+ return NULL;
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+#endif
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+}
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+
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+/*
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+ * The affected CPUs below in 'cpu_needs_post_dma_flush()' can
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+ * speculatively fill random cachelines with stale data at any time,
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+ * requiring an extra flush post-DMA.
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+ *
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+ * Warning on the terminology - Linux calls an uncached area coherent;
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+ * MIPS terminology calls memory areas with hardware maintained coherency
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+ * coherent.
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+ *
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+ * Note that the R14000 and R16000 should also be checked for in this
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+ * condition. However this function is only called on non-I/O-coherent
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+ * systems and only the R10000 and R12000 are used in such systems, the
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+ * SGI IP28 Indigo² rsp. SGI IP32 aka O2.
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+ */
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+static inline int cpu_needs_post_dma_flush(struct device *dev)
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+{
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+ return !plat_device_is_coherent(dev) &&
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+ (boot_cpu_type() == CPU_R10000 ||
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+ boot_cpu_type() == CPU_R12000 ||
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+ boot_cpu_type() == CPU_BMIPS5000);
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+}
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+
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+static inline struct page *dma_addr_to_page(struct device *dev,
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+ dma_addr_t dma_addr)
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+{
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+ return pfn_to_page(
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+ plat_dma_addr_to_phys(dev, dma_addr) >> PAGE_SHIFT);
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}
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static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
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@@ -29,9 +77,399 @@ static inline bool dma_capable(struct de
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static inline void dma_mark_clean(void *addr, size_t size) {}
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-#include <asm-generic/dma-mapping-common.h>
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+static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
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+ size_t size,
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+ enum dma_data_direction dir,
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+ struct dma_attrs *attrs)
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+{
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+ struct dma_map_ops *ops = get_dma_ops(dev);
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+ unsigned long offset = (unsigned long)ptr & ~PAGE_MASK;
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+ struct page *page = virt_to_page(ptr);
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+ dma_addr_t addr;
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+
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+ kmemcheck_mark_initialized(ptr, size);
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+ BUG_ON(!valid_dma_direction(dir));
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+ if (ops) {
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+ addr = ops->map_page(dev, page, offset, size, dir, attrs);
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+ } else {
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+ if (!plat_device_is_coherent(dev))
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+ __dma_sync(page, offset, size, dir);
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+
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+ addr = plat_map_dma_mem_page(dev, page) + offset;
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+ }
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+ debug_dma_map_page(dev, page, offset, size, dir, addr, true);
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+ return addr;
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+}
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+
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+static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t addr,
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+ size_t size,
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+ enum dma_data_direction dir,
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+ struct dma_attrs *attrs)
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+{
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+ struct dma_map_ops *ops = get_dma_ops(dev);
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+
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+ BUG_ON(!valid_dma_direction(dir));
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+ if (ops) {
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+ ops->unmap_page(dev, addr, size, dir, attrs);
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+ } else {
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+ if (cpu_needs_post_dma_flush(dev))
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+ __dma_sync(dma_addr_to_page(dev, addr),
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+ addr & ~PAGE_MASK, size, dir);
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+ plat_post_dma_flush(dev);
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+ plat_unmap_dma_mem(dev, addr, size, dir);
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+ }
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+ debug_dma_unmap_page(dev, addr, size, dir, true);
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+}
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+
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+/*
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+ * dma_maps_sg_attrs returns 0 on error and > 0 on success.
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+ * It should never return a value < 0.
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+ */
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+static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg,
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+ int nents, enum dma_data_direction dir,
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+ struct dma_attrs *attrs)
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+{
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+ struct dma_map_ops *ops = get_dma_ops(dev);
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+ int i, ents;
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+ struct scatterlist *s;
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+
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+ for_each_sg(sg, s, nents, i)
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+ kmemcheck_mark_initialized(sg_virt(s), s->length);
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+ BUG_ON(!valid_dma_direction(dir));
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+ if (ops) {
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+ ents = ops->map_sg(dev, sg, nents, dir, attrs);
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+ } else {
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+ for_each_sg(sg, s, nents, i) {
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+ struct page *page = sg_page(s);
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+
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+ if (!plat_device_is_coherent(dev))
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+ __dma_sync(page, s->offset, s->length, dir);
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+#ifdef CONFIG_NEED_SG_DMA_LENGTH
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+ s->dma_length = s->length;
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+#endif
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+ s->dma_address =
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+ plat_map_dma_mem_page(dev, page) + s->offset;
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+ }
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+ ents = nents;
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+ }
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+ BUG_ON(ents < 0);
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+ debug_dma_map_sg(dev, sg, nents, ents, dir);
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+
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+ return ents;
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+}
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+
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+static inline void dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg,
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+ int nents, enum dma_data_direction dir,
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+ struct dma_attrs *attrs)
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+{
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+ struct dma_map_ops *ops = get_dma_ops(dev);
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+ struct scatterlist *s;
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+ int i;
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+
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+ BUG_ON(!valid_dma_direction(dir));
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+ debug_dma_unmap_sg(dev, sg, nents, dir);
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+ if (ops) {
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+ ops->unmap_sg(dev, sg, nents, dir, attrs);
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+ return;
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+ }
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+ for_each_sg(sg, s, nents, i) {
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+ if (!plat_device_is_coherent(dev) && dir != DMA_TO_DEVICE)
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+ __dma_sync(sg_page(s), s->offset, s->length, dir);
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+ plat_unmap_dma_mem(dev, s->dma_address, s->length, dir);
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+ }
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+}
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+
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+static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
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+ size_t offset, size_t size,
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+ enum dma_data_direction dir)
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+{
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+ struct dma_map_ops *ops = get_dma_ops(dev);
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+ dma_addr_t addr;
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+
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+ kmemcheck_mark_initialized(page_address(page) + offset, size);
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+ BUG_ON(!valid_dma_direction(dir));
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+ if (ops) {
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+ addr = ops->map_page(dev, page, offset, size, dir, NULL);
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+ } else {
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+ if (!plat_device_is_coherent(dev))
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+ __dma_sync(page, offset, size, dir);
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+
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+ addr = plat_map_dma_mem_page(dev, page) + offset;
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+ }
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+ debug_dma_map_page(dev, page, offset, size, dir, addr, false);
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+
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+ return addr;
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+}
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+
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+static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
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+ size_t size, enum dma_data_direction dir)
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+{
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+ struct dma_map_ops *ops = get_dma_ops(dev);
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+
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+ BUG_ON(!valid_dma_direction(dir));
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+ if (ops) {
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+ ops->unmap_page(dev, addr, size, dir, NULL);
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+ } else {
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+ if (cpu_needs_post_dma_flush(dev))
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+ __dma_sync(dma_addr_to_page(dev, addr),
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+ addr & ~PAGE_MASK, size, dir);
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+ plat_post_dma_flush(dev);
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+ plat_unmap_dma_mem(dev, addr, size, dir);
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+ }
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+ debug_dma_unmap_page(dev, addr, size, dir, false);
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+}
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+
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+static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,
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+ size_t size,
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+ enum dma_data_direction dir)
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+{
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+ struct dma_map_ops *ops = get_dma_ops(dev);
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+
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+ BUG_ON(!valid_dma_direction(dir));
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+ if (ops) {
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+ ops->sync_single_for_cpu(dev, addr, size, dir);
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+ } else {
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+ if (cpu_needs_post_dma_flush(dev))
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+ __dma_sync(dma_addr_to_page(dev, addr),
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+ addr & ~PAGE_MASK, size, dir);
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+ plat_post_dma_flush(dev);
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+ }
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+ debug_dma_sync_single_for_cpu(dev, addr, size, dir);
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+}
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+
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+static inline void dma_sync_single_for_device(struct device *dev,
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+ dma_addr_t addr, size_t size,
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+ enum dma_data_direction dir)
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+{
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+ struct dma_map_ops *ops = get_dma_ops(dev);
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+
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+ BUG_ON(!valid_dma_direction(dir));
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+ if (ops)
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+ ops->sync_single_for_device(dev, addr, size, dir);
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+ else if (!plat_device_is_coherent(dev))
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+ __dma_sync(dma_addr_to_page(dev, addr),
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+ addr & ~PAGE_MASK, size, dir);
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+ debug_dma_sync_single_for_device(dev, addr, size, dir);
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+}
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+
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+static inline void dma_sync_single_range_for_cpu(struct device *dev,
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+ dma_addr_t addr,
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+ unsigned long offset,
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+ size_t size,
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+ enum dma_data_direction dir)
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+{
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+ const struct dma_map_ops *ops = get_dma_ops(dev);
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+
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+ BUG_ON(!valid_dma_direction(dir));
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+ if (ops) {
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+ ops->sync_single_for_cpu(dev, addr + offset, size, dir);
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+ } else {
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+ if (cpu_needs_post_dma_flush(dev))
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+ __dma_sync(dma_addr_to_page(dev, addr + offset),
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+ (addr + offset) & ~PAGE_MASK, size, dir);
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+ plat_post_dma_flush(dev);
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+ }
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+
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+ debug_dma_sync_single_range_for_cpu(dev, addr, offset, size, dir);
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+}
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+
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+static inline void dma_sync_single_range_for_device(struct device *dev,
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+ dma_addr_t addr,
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+ unsigned long offset,
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+ size_t size,
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+ enum dma_data_direction dir)
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+{
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+ const struct dma_map_ops *ops = get_dma_ops(dev);
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+
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+ BUG_ON(!valid_dma_direction(dir));
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+ if (ops)
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+ ops->sync_single_for_device(dev, addr + offset, size, dir);
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+ else if (!plat_device_is_coherent(dev))
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+ __dma_sync(dma_addr_to_page(dev, addr + offset),
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+ (addr + offset) & ~PAGE_MASK, size, dir);
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+ debug_dma_sync_single_range_for_device(dev, addr, offset, size, dir);
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+}
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+
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+static inline void
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+dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
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+ int nelems, enum dma_data_direction dir)
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+{
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+ struct dma_map_ops *ops = get_dma_ops(dev);
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+ struct scatterlist *s;
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+ int i;
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+
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+ BUG_ON(!valid_dma_direction(dir));
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+ if (ops) {
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+ ops->sync_sg_for_cpu(dev, sg, nelems, dir);
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+ } else if (cpu_needs_post_dma_flush(dev)) {
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+ for_each_sg(sg, s, nelems, i)
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+ __dma_sync(sg_page(s), s->offset, s->length, dir);
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+ }
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+ plat_post_dma_flush(dev);
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+ debug_dma_sync_sg_for_cpu(dev, sg, nelems, dir);
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+}
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+
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+static inline void
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+dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
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+ int nelems, enum dma_data_direction dir)
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+{
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+ struct dma_map_ops *ops = get_dma_ops(dev);
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+ struct scatterlist *s;
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+ int i;
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+
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+ BUG_ON(!valid_dma_direction(dir));
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+ if (ops) {
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+ ops->sync_sg_for_device(dev, sg, nelems, dir);
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+ } else if (!plat_device_is_coherent(dev)) {
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+ for_each_sg(sg, s, nelems, i)
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+ __dma_sync(sg_page(s), s->offset, s->length, dir);
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+ }
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+ debug_dma_sync_sg_for_device(dev, sg, nelems, dir);
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+
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+}
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+
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+#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
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+#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
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+#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
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+#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)
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+
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+extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
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+ void *cpu_addr, dma_addr_t dma_addr, size_t size);
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+
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+/**
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+ * dma_mmap_attrs - map a coherent DMA allocation into user space
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+ * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
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+ * @vma: vm_area_struct describing requested user mapping
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+ * @cpu_addr: kernel CPU-view address returned from dma_alloc_attrs
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+ * @handle: device-view address returned from dma_alloc_attrs
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+ * @size: size of memory originally requested in dma_alloc_attrs
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+ * @attrs: attributes of mapping properties requested in dma_alloc_attrs
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+ *
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+ * Map a coherent DMA buffer previously allocated by dma_alloc_attrs
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+ * into user space. The coherent DMA buffer must not be freed by the
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+ * driver until the user space mapping has been released.
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+ */
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+static inline int
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+dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma, void *cpu_addr,
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+ dma_addr_t dma_addr, size_t size, struct dma_attrs *attrs)
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+{
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+ struct dma_map_ops *ops = get_dma_ops(dev);
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+ BUG_ON(!ops);
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+ if (ops && ops->mmap)
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+ return ops->mmap(dev, vma, cpu_addr, dma_addr, size, attrs);
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+ return dma_common_mmap(dev, vma, cpu_addr, dma_addr, size);
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+}
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+
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+#define dma_mmap_coherent(d, v, c, h, s) dma_mmap_attrs(d, v, c, h, s, NULL)
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+
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+int
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+dma_common_get_sgtable(struct device *dev, struct sg_table *sgt,
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+ void *cpu_addr, dma_addr_t dma_addr, size_t size);
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+
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+static inline int
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+dma_get_sgtable_attrs(struct device *dev, struct sg_table *sgt, void *cpu_addr,
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+ dma_addr_t dma_addr, size_t size, struct dma_attrs *attrs)
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+{
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+ struct dma_map_ops *ops = get_dma_ops(dev);
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+ BUG_ON(!ops);
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+ if (ops && ops->get_sgtable)
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+ return ops->get_sgtable(dev, sgt, cpu_addr, dma_addr, size,
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+ attrs);
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+ return dma_common_get_sgtable(dev, sgt, cpu_addr, dma_addr, size);
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+}
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+
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+#define dma_get_sgtable(d, t, v, h, s) dma_get_sgtable_attrs(d, t, v, h, s, NULL)
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+
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+static inline int dma_supported(struct device *dev, u64 mask)
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+{
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+ struct dma_map_ops *ops = get_dma_ops(dev);
|
|
+ if (ops)
|
|
+ return ops->dma_supported(dev, mask);
|
|
+ return plat_dma_supported(dev, mask);
|
|
+}
|
|
+
|
|
+static inline int dma_mapping_error(struct device *dev, u64 mask)
|
|
+{
|
|
+ struct dma_map_ops *ops = get_dma_ops(dev);
|
|
+
|
|
+ debug_dma_mapping_error(dev, mask);
|
|
+ if (ops)
|
|
+ return ops->mapping_error(dev, mask);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static inline int
|
|
+dma_set_mask(struct device *dev, u64 mask)
|
|
+{
|
|
+ struct dma_map_ops *ops = get_dma_ops(dev);
|
|
+
|
|
+ if(!dev->dma_mask || !dma_supported(dev, mask))
|
|
+ return -EIO;
|
|
+
|
|
+ if (ops && ops->set_dma_mask)
|
|
+ return ops->set_dma_mask(dev, mask);
|
|
+
|
|
+ *dev->dma_mask = mask;
|
|
+
|
|
+ return 0;
|
|
+}
|
|
|
|
extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
|
|
enum dma_data_direction direction);
|
|
|
|
+#define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL)
|
|
+
|
|
+static inline void *dma_alloc_attrs(struct device *dev, size_t size,
|
|
+ dma_addr_t *dma_handle, gfp_t gfp,
|
|
+ struct dma_attrs *attrs)
|
|
+{
|
|
+ void *ret;
|
|
+ struct dma_map_ops *ops = get_dma_ops(dev);
|
|
+
|
|
+ if (ops)
|
|
+ ret = ops->alloc(dev, size, dma_handle, gfp, attrs);
|
|
+ else
|
|
+ ret = mips_dma_alloc_coherent(dev, size, dma_handle, gfp,
|
|
+ attrs);
|
|
+
|
|
+ debug_dma_alloc_coherent(dev, size, *dma_handle, ret);
|
|
+
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
|
|
+
|
|
+static inline void dma_free_attrs(struct device *dev, size_t size,
|
|
+ void *vaddr, dma_addr_t dma_handle,
|
|
+ struct dma_attrs *attrs)
|
|
+{
|
|
+ struct dma_map_ops *ops = get_dma_ops(dev);
|
|
+
|
|
+ if (ops)
|
|
+ ops->free(dev, size, vaddr, dma_handle, attrs);
|
|
+ else
|
|
+ mips_dma_free_coherent(dev, size, vaddr, dma_handle, attrs);
|
|
+
|
|
+ debug_dma_free_coherent(dev, size, vaddr, dma_handle);
|
|
+}
|
|
+
|
|
+static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
|
|
+ dma_addr_t *dma_handle, gfp_t gfp)
|
|
+{
|
|
+ DEFINE_DMA_ATTRS(attrs);
|
|
+
|
|
+ dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
|
|
+ return dma_alloc_attrs(dev, size, dma_handle, gfp, &attrs);
|
|
+}
|
|
+
|
|
+static inline void dma_free_noncoherent(struct device *dev, size_t size,
|
|
+ void *cpu_addr, dma_addr_t dma_handle)
|
|
+{
|
|
+ DEFINE_DMA_ATTRS(attrs);
|
|
+
|
|
+ dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
|
|
+ dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs);
|
|
+}
|
|
+
|
|
+
|
|
#endif /* _ASM_DMA_MAPPING_H */
|
|
--- a/arch/mips/mm/dma-default.c
|
|
+++ b/arch/mips/mm/dma-default.c
|
|
@@ -46,35 +46,6 @@ static int __init setnocoherentio(char *
|
|
early_param("nocoherentio", setnocoherentio);
|
|
#endif
|
|
|
|
-static inline struct page *dma_addr_to_page(struct device *dev,
|
|
- dma_addr_t dma_addr)
|
|
-{
|
|
- return pfn_to_page(
|
|
- plat_dma_addr_to_phys(dev, dma_addr) >> PAGE_SHIFT);
|
|
-}
|
|
-
|
|
-/*
|
|
- * The affected CPUs below in 'cpu_needs_post_dma_flush()' can
|
|
- * speculatively fill random cachelines with stale data at any time,
|
|
- * requiring an extra flush post-DMA.
|
|
- *
|
|
- * Warning on the terminology - Linux calls an uncached area coherent;
|
|
- * MIPS terminology calls memory areas with hardware maintained coherency
|
|
- * coherent.
|
|
- *
|
|
- * Note that the R14000 and R16000 should also be checked for in this
|
|
- * condition. However this function is only called on non-I/O-coherent
|
|
- * systems and only the R10000 and R12000 are used in such systems, the
|
|
- * SGI IP28 Indigo² rsp. SGI IP32 aka O2.
|
|
- */
|
|
-static inline int cpu_needs_post_dma_flush(struct device *dev)
|
|
-{
|
|
- return !plat_device_is_coherent(dev) &&
|
|
- (boot_cpu_type() == CPU_R10000 ||
|
|
- boot_cpu_type() == CPU_R12000 ||
|
|
- boot_cpu_type() == CPU_BMIPS5000);
|
|
-}
|
|
-
|
|
static gfp_t massage_gfp_flags(const struct device *dev, gfp_t gfp)
|
|
{
|
|
gfp_t dma_flag;
|
|
@@ -129,7 +100,7 @@ static void *mips_dma_alloc_noncoherent(
|
|
return ret;
|
|
}
|
|
|
|
-static void *mips_dma_alloc_coherent(struct device *dev, size_t size,
|
|
+void *mips_dma_alloc_coherent(struct device *dev, size_t size,
|
|
dma_addr_t * dma_handle, gfp_t gfp, struct dma_attrs *attrs)
|
|
{
|
|
void *ret;
|
|
@@ -165,6 +136,7 @@ static void *mips_dma_alloc_coherent(str
|
|
|
|
return ret;
|
|
}
|
|
+EXPORT_SYMBOL(mips_dma_alloc_coherent);
|
|
|
|
|
|
static void mips_dma_free_noncoherent(struct device *dev, size_t size,
|
|
@@ -174,7 +146,7 @@ static void mips_dma_free_noncoherent(st
|
|
free_pages((unsigned long) vaddr, get_order(size));
|
|
}
|
|
|
|
-static void mips_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
|
|
+void mips_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
|
|
dma_addr_t dma_handle, struct dma_attrs *attrs)
|
|
{
|
|
unsigned long addr = (unsigned long) vaddr;
|
|
@@ -196,40 +168,7 @@ static void mips_dma_free_coherent(struc
|
|
if (!dma_release_from_contiguous(dev, page, count))
|
|
__free_pages(page, get_order(size));
|
|
}
|
|
-
|
|
-static int mips_dma_mmap(struct device *dev, struct vm_area_struct *vma,
|
|
- void *cpu_addr, dma_addr_t dma_addr, size_t size,
|
|
- struct dma_attrs *attrs)
|
|
-{
|
|
- unsigned long user_count = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
|
|
- unsigned long count = PAGE_ALIGN(size) >> PAGE_SHIFT;
|
|
- unsigned long addr = (unsigned long)cpu_addr;
|
|
- unsigned long off = vma->vm_pgoff;
|
|
- unsigned long pfn;
|
|
- int ret = -ENXIO;
|
|
-
|
|
- if (!plat_device_is_coherent(dev) && !hw_coherentio)
|
|
- addr = CAC_ADDR(addr);
|
|
-
|
|
- pfn = page_to_pfn(virt_to_page((void *)addr));
|
|
-
|
|
- if (dma_get_attr(DMA_ATTR_WRITE_COMBINE, attrs))
|
|
- vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
|
|
- else
|
|
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
|
|
-
|
|
- if (dma_mmap_from_coherent(dev, vma, cpu_addr, size, &ret))
|
|
- return ret;
|
|
-
|
|
- if (off < count && user_count <= (count - off)) {
|
|
- ret = remap_pfn_range(vma, vma->vm_start,
|
|
- pfn + off,
|
|
- user_count << PAGE_SHIFT,
|
|
- vma->vm_page_prot);
|
|
- }
|
|
-
|
|
- return ret;
|
|
-}
|
|
+EXPORT_SYMBOL(mips_dma_free_coherent);
|
|
|
|
static inline void __dma_sync_virtual(void *addr, size_t size,
|
|
enum dma_data_direction direction)
|
|
@@ -258,7 +197,7 @@ static inline void __dma_sync_virtual(vo
|
|
* If highmem is not configured then the bulk of this loop gets
|
|
* optimized out.
|
|
*/
|
|
-static inline void __dma_sync(struct page *page,
|
|
+void __dma_sync(struct page *page,
|
|
unsigned long offset, size_t size, enum dma_data_direction direction)
|
|
{
|
|
size_t left = size;
|
|
@@ -288,120 +227,7 @@ static inline void __dma_sync(struct pag
|
|
left -= len;
|
|
} while (left);
|
|
}
|
|
-
|
|
-static void mips_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
|
|
- size_t size, enum dma_data_direction direction, struct dma_attrs *attrs)
|
|
-{
|
|
- if (cpu_needs_post_dma_flush(dev))
|
|
- __dma_sync(dma_addr_to_page(dev, dma_addr),
|
|
- dma_addr & ~PAGE_MASK, size, direction);
|
|
- plat_post_dma_flush(dev);
|
|
- plat_unmap_dma_mem(dev, dma_addr, size, direction);
|
|
-}
|
|
-
|
|
-static int mips_dma_map_sg(struct device *dev, struct scatterlist *sglist,
|
|
- int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
|
|
-{
|
|
- int i;
|
|
- struct scatterlist *sg;
|
|
-
|
|
- for_each_sg(sglist, sg, nents, i) {
|
|
- if (!plat_device_is_coherent(dev))
|
|
- __dma_sync(sg_page(sg), sg->offset, sg->length,
|
|
- direction);
|
|
-#ifdef CONFIG_NEED_SG_DMA_LENGTH
|
|
- sg->dma_length = sg->length;
|
|
-#endif
|
|
- sg->dma_address = plat_map_dma_mem_page(dev, sg_page(sg)) +
|
|
- sg->offset;
|
|
- }
|
|
-
|
|
- return nents;
|
|
-}
|
|
-
|
|
-static dma_addr_t mips_dma_map_page(struct device *dev, struct page *page,
|
|
- unsigned long offset, size_t size, enum dma_data_direction direction,
|
|
- struct dma_attrs *attrs)
|
|
-{
|
|
- if (!plat_device_is_coherent(dev))
|
|
- __dma_sync(page, offset, size, direction);
|
|
-
|
|
- return plat_map_dma_mem_page(dev, page) + offset;
|
|
-}
|
|
-
|
|
-static void mips_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
|
|
- int nhwentries, enum dma_data_direction direction,
|
|
- struct dma_attrs *attrs)
|
|
-{
|
|
- int i;
|
|
- struct scatterlist *sg;
|
|
-
|
|
- for_each_sg(sglist, sg, nhwentries, i) {
|
|
- if (!plat_device_is_coherent(dev) &&
|
|
- direction != DMA_TO_DEVICE)
|
|
- __dma_sync(sg_page(sg), sg->offset, sg->length,
|
|
- direction);
|
|
- plat_unmap_dma_mem(dev, sg->dma_address, sg->length, direction);
|
|
- }
|
|
-}
|
|
-
|
|
-static void mips_dma_sync_single_for_cpu(struct device *dev,
|
|
- dma_addr_t dma_handle, size_t size, enum dma_data_direction direction)
|
|
-{
|
|
- if (cpu_needs_post_dma_flush(dev))
|
|
- __dma_sync(dma_addr_to_page(dev, dma_handle),
|
|
- dma_handle & ~PAGE_MASK, size, direction);
|
|
- plat_post_dma_flush(dev);
|
|
-}
|
|
-
|
|
-static void mips_dma_sync_single_for_device(struct device *dev,
|
|
- dma_addr_t dma_handle, size_t size, enum dma_data_direction direction)
|
|
-{
|
|
- if (!plat_device_is_coherent(dev))
|
|
- __dma_sync(dma_addr_to_page(dev, dma_handle),
|
|
- dma_handle & ~PAGE_MASK, size, direction);
|
|
-}
|
|
-
|
|
-static void mips_dma_sync_sg_for_cpu(struct device *dev,
|
|
- struct scatterlist *sglist, int nelems,
|
|
- enum dma_data_direction direction)
|
|
-{
|
|
- int i;
|
|
- struct scatterlist *sg;
|
|
-
|
|
- if (cpu_needs_post_dma_flush(dev)) {
|
|
- for_each_sg(sglist, sg, nelems, i) {
|
|
- __dma_sync(sg_page(sg), sg->offset, sg->length,
|
|
- direction);
|
|
- }
|
|
- }
|
|
- plat_post_dma_flush(dev);
|
|
-}
|
|
-
|
|
-static void mips_dma_sync_sg_for_device(struct device *dev,
|
|
- struct scatterlist *sglist, int nelems,
|
|
- enum dma_data_direction direction)
|
|
-{
|
|
- int i;
|
|
- struct scatterlist *sg;
|
|
-
|
|
- if (!plat_device_is_coherent(dev)) {
|
|
- for_each_sg(sglist, sg, nelems, i) {
|
|
- __dma_sync(sg_page(sg), sg->offset, sg->length,
|
|
- direction);
|
|
- }
|
|
- }
|
|
-}
|
|
-
|
|
-int mips_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
|
|
-{
|
|
- return 0;
|
|
-}
|
|
-
|
|
-int mips_dma_supported(struct device *dev, u64 mask)
|
|
-{
|
|
- return plat_dma_supported(dev, mask);
|
|
-}
|
|
+EXPORT_SYMBOL(__dma_sync);
|
|
|
|
void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
|
|
enum dma_data_direction direction)
|
|
@@ -414,24 +240,10 @@ void dma_cache_sync(struct device *dev,
|
|
|
|
EXPORT_SYMBOL(dma_cache_sync);
|
|
|
|
-static struct dma_map_ops mips_default_dma_map_ops = {
|
|
- .alloc = mips_dma_alloc_coherent,
|
|
- .free = mips_dma_free_coherent,
|
|
- .mmap = mips_dma_mmap,
|
|
- .map_page = mips_dma_map_page,
|
|
- .unmap_page = mips_dma_unmap_page,
|
|
- .map_sg = mips_dma_map_sg,
|
|
- .unmap_sg = mips_dma_unmap_sg,
|
|
- .sync_single_for_cpu = mips_dma_sync_single_for_cpu,
|
|
- .sync_single_for_device = mips_dma_sync_single_for_device,
|
|
- .sync_sg_for_cpu = mips_dma_sync_sg_for_cpu,
|
|
- .sync_sg_for_device = mips_dma_sync_sg_for_device,
|
|
- .mapping_error = mips_dma_mapping_error,
|
|
- .dma_supported = mips_dma_supported
|
|
-};
|
|
-
|
|
-struct dma_map_ops *mips_dma_map_ops = &mips_default_dma_map_ops;
|
|
+#ifdef CONFIG_SYS_HAS_DMA_OPS
|
|
+struct dma_map_ops *mips_dma_map_ops = NULL;
|
|
EXPORT_SYMBOL(mips_dma_map_ops);
|
|
+#endif
|
|
|
|
#define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16)
|
|
|