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authorChristoph Hellwig <hch@lst.de>2018-06-15 13:08:52 +0200
committerPaul Burton <paul.burton@mips.com>2018-06-24 09:27:27 -0700
commitd59098a0e9cb3c7767090e935c909b37a30629ab (patch)
treef2e441e3120de9eab00e1cd60b17baa68ba7b9d7 /arch/mips/bmips/dma.c
parentfaef87723ace12e5f685437c1e68cbecb69a7a89 (diff)
MIPS: bmips: use generic dma noncoherent ops
Provide phys_to_dma/dma_to_phys helpers, and the special arch_sync_dma_for_cpu_all hook, everything else is generic Signed-off-by: Christoph Hellwig <hch@lst.de> Patchwork: https://patchwork.linux-mips.org/patch/19550/ Signed-off-by: Paul Burton <paul.burton@mips.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: David Daney <david.daney@cavium.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Jiaxun Yang <jiaxun.yang@flygoat.com> Cc: Tom Bogendoerfer <tsbogend@alpha.franken.de> Cc: Huacai Chen <chenhc@lemote.com> Cc: iommu@lists.linux-foundation.org Cc: linux-mips@linux-mips.org
Diffstat (limited to 'arch/mips/bmips/dma.c')
-rw-r--r--arch/mips/bmips/dma.c32
1 files changed, 19 insertions, 13 deletions
diff --git a/arch/mips/bmips/dma.c b/arch/mips/bmips/dma.c
index 6dec30842b2f..3d13c77c125f 100644
--- a/arch/mips/bmips/dma.c
+++ b/arch/mips/bmips/dma.c
@@ -17,7 +17,7 @@
#include <linux/printk.h>
#include <linux/slab.h>
#include <linux/types.h>
-#include <dma-coherence.h>
+#include <asm/bmips.h>
/*
* BCM338x has configurable address translation windows which allow the
@@ -40,7 +40,7 @@ static struct bmips_dma_range *bmips_dma_ranges;
#define FLUSH_RAC 0x100
-static dma_addr_t bmips_phys_to_dma(struct device *dev, phys_addr_t pa)
+dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t pa)
{
struct bmips_dma_range *r;
@@ -52,17 +52,7 @@ static dma_addr_t bmips_phys_to_dma(struct device *dev, phys_addr_t pa)
return pa;
}
-dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, size_t size)
-{
- return bmips_phys_to_dma(dev, virt_to_phys(addr));
-}
-
-dma_addr_t plat_map_dma_mem_page(struct device *dev, struct page *page)
-{
- return bmips_phys_to_dma(dev, page_to_phys(page));
-}
-
-unsigned long plat_dma_addr_to_phys(struct device *dev, dma_addr_t dma_addr)
+phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dma_addr)
{
struct bmips_dma_range *r;
@@ -74,6 +64,22 @@ unsigned long plat_dma_addr_to_phys(struct device *dev, dma_addr_t dma_addr)
return dma_addr;
}
+void arch_sync_dma_for_cpu_all(struct device *dev)
+{
+ void __iomem *cbr = BMIPS_GET_CBR();
+ u32 cfg;
+
+ if (boot_cpu_type() != CPU_BMIPS3300 &&
+ boot_cpu_type() != CPU_BMIPS4350 &&
+ boot_cpu_type() != CPU_BMIPS4380)
+ return;
+
+ /* Flush stale data out of the readahead cache */
+ cfg = __raw_readl(cbr + BMIPS_RAC_CONFIG);
+ __raw_writel(cfg | 0x100, cbr + BMIPS_RAC_CONFIG);
+ __raw_readl(cbr + BMIPS_RAC_CONFIG);
+}
+
static int __init bmips_init_dma_ranges(void)
{
struct device_node *np =