iommu/tegra-smmu: Move flush_dcache to tegra-smmu.c

Drivers should not be using __cpuc_* functions nor outer_cache_flush()
directly.  This change partly cleans up tegra-smmu.c.

The only difference between cache handling of the tegra variants is
Denver, which omits the call to outer_cache_flush().  This is due to
Denver being an ARM64 CPU, and the ARM64 architecture does not provide
this function.  (This, in itself, is a good reason why these should not
be used.)

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[treding@nvidia.com: fix build failure on 64-bit ARM]
Signed-off-by: Thierry Reding <treding@nvidia.com>

5 files changed, 25 insertions, 76 deletions

diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index d649b06cc4ca..42b13c07aeef 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -16,6 +16,8 @@
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 
+#include <asm/cacheflush.h>
+
 #include <soc/tegra/ahb.h>
 #include <soc/tegra/mc.h>
 
@@ -145,6 +147,24 @@ static unsigned int iova_pt_index(unsigned long iova)
         return (iova >> SMMU_PTE_SHIFT) & (SMMU_NUM_PTE - 1);
 }
 
+static void smmu_flush_dcache(struct page *page, unsigned long offset,
+                              size_t size)
+{
+#ifdef CONFIG_ARM
+        phys_addr_t phys = page_to_phys(page) + offset;
+#endif
+        void *virt = page_address(page) + offset;
+
+#ifdef CONFIG_ARM
+        __cpuc_flush_dcache_area(virt, size);
+        outer_flush_range(phys, phys + size);
+#endif
+
+#ifdef CONFIG_ARM64
+        __flush_dcache_area(virt, size);
+#endif
+}
+
 static inline void smmu_flush_ptc(struct tegra_smmu *smmu, struct page *page,
                                   unsigned long offset)
 {
@@ -392,7 +412,7 @@ static int tegra_smmu_as_prepare(struct tegra_smmu *smmu,
         if (err < 0)
                 return err;
 
-        smmu->soc->ops->flush_dcache(as->pd, 0, SMMU_SIZE_PD);
+        smmu_flush_dcache(as->pd, 0, SMMU_SIZE_PD);
         smmu_flush_ptc(smmu, as->pd, 0);
         smmu_flush_tlb_asid(smmu, as->id);
 
@@ -521,11 +541,11 @@ static u32 *as_get_pte(struct tegra_smmu_as *as, dma_addr_t iova,
 
                 as->pts[pde] = page;
 
-                smmu->soc->ops->flush_dcache(page, 0, SMMU_SIZE_PT);
+                smmu_flush_dcache(page, 0, SMMU_SIZE_PT);
 
                 pd[pde] = SMMU_MK_PDE(page, SMMU_PDE_ATTR | SMMU_PDE_NEXT);
 
-                smmu->soc->ops->flush_dcache(as->pd, pde << 2, 4);
+                smmu_flush_dcache(as->pd, pde << 2, 4);
                 smmu_flush_ptc(smmu, as->pd, pde << 2);
                 smmu_flush_tlb_section(smmu, as->id, iova);
                 smmu_flush(smmu);
@@ -562,7 +582,7 @@ static void tegra_smmu_pte_put_use(struct tegra_smmu_as *as, unsigned long iova)
                 pd[pde] = 0;
 
                 /* Flush the page directory entry */
-                smmu->soc->ops->flush_dcache(as->pd, offset, sizeof(*pd));
+                smmu_flush_dcache(as->pd, offset, sizeof(*pd));
                 smmu_flush_ptc(smmu, as->pd, offset);
                 smmu_flush_tlb_section(smmu, as->id, iova);
                 smmu_flush(smmu);
@@ -582,7 +602,7 @@ static void tegra_smmu_set_pte(struct tegra_smmu_as *as, unsigned long iova,
 
         *pte = val;
 
-        smmu->soc->ops->flush_dcache(pte_page, offset, 4);
+        smmu_flush_dcache(pte_page, offset, 4);
         smmu_flush_ptc(smmu, pte_page, offset);
         smmu_flush_tlb_group(smmu, as->id, iova);
         smmu_flush(smmu);
diff --git a/drivers/memory/tegra/tegra114.c b/drivers/memory/tegra/tegra114.c
index 9f579589e800..7122f39be9cc 100644
--- a/drivers/memory/tegra/tegra114.c
+++ b/drivers/memory/tegra/tegra114.c
@@ -9,8 +9,6 @@
 #include <linux/of.h>
 #include <linux/mm.h>
 
-#include <asm/cacheflush.h>
-
 #include <dt-bindings/memory/tegra114-mc.h>
 
 #include "mc.h"
@@ -914,20 +912,6 @@ static const struct tegra_smmu_swgroup tegra114_swgroups[] = {
         { .name = "tsec",      .swgroup = TEGRA_SWGROUP_TSEC,      .reg = 0x294 },
 };
 
-static void tegra114_flush_dcache(struct page *page, unsigned long offset,
-                                  size_t size)
-{
-        phys_addr_t phys = page_to_phys(page) + offset;
-        void *virt = page_address(page) + offset;
-
-        __cpuc_flush_dcache_area(virt, size);
-        outer_flush_range(phys, phys + size);
-}
-
-static const struct tegra_smmu_ops tegra114_smmu_ops = {
-        .flush_dcache = tegra114_flush_dcache,
-};
-
 static const struct tegra_smmu_soc tegra114_smmu_soc = {
         .clients = tegra114_mc_clients,
         .num_clients = ARRAY_SIZE(tegra114_mc_clients),
@@ -936,7 +920,6 @@ static const struct tegra_smmu_soc tegra114_smmu_soc = {
         .supports_round_robin_arbitration = false,
         .supports_request_limit = false,
         .num_asids = 4,
-        .ops = &tegra114_smmu_ops,
 };
 
 const struct tegra_mc_soc tegra114_mc_soc = {
diff --git a/drivers/memory/tegra/tegra124.c b/drivers/memory/tegra/tegra124.c
index 966e1557e6f4..ebda63283853 100644
--- a/drivers/memory/tegra/tegra124.c
+++ b/drivers/memory/tegra/tegra124.c
@@ -9,8 +9,6 @@
 #include <linux/of.h>
 #include <linux/mm.h>
 
-#include <asm/cacheflush.h>
-
 #include <dt-bindings/memory/tegra124-mc.h>
 
 #include "mc.h"
@@ -1002,20 +1000,6 @@ static const struct tegra_smmu_swgroup tegra124_swgroups[] = {
 };
 
 #ifdef CONFIG_ARCH_TEGRA_124_SOC
-static void tegra124_flush_dcache(struct page *page, unsigned long offset,
-                                  size_t size)
-{
-        phys_addr_t phys = page_to_phys(page) + offset;
-        void *virt = page_address(page) + offset;
-
-        __cpuc_flush_dcache_area(virt, size);
-        outer_flush_range(phys, phys + size);
-}
-
-static const struct tegra_smmu_ops tegra124_smmu_ops = {
-        .flush_dcache = tegra124_flush_dcache,
-};
-
 static const struct tegra_smmu_soc tegra124_smmu_soc = {
         .clients = tegra124_mc_clients,
         .num_clients = ARRAY_SIZE(tegra124_mc_clients),
@@ -1024,7 +1008,6 @@ static const struct tegra_smmu_soc tegra124_smmu_soc = {
         .supports_round_robin_arbitration = true,
         .supports_request_limit = true,
         .num_asids = 128,
-        .ops = &tegra124_smmu_ops,
 };
 
 const struct tegra_mc_soc tegra124_mc_soc = {
@@ -1039,18 +1022,6 @@ const struct tegra_mc_soc tegra124_mc_soc = {
 #endif /* CONFIG_ARCH_TEGRA_124_SOC */
 
 #ifdef CONFIG_ARCH_TEGRA_132_SOC
-static void tegra132_flush_dcache(struct page *page, unsigned long offset,
-                                  size_t size)
-{
-        void *virt = page_address(page) + offset;
-
-        __flush_dcache_area(virt, size);
-}
-
-static const struct tegra_smmu_ops tegra132_smmu_ops = {
-        .flush_dcache = tegra132_flush_dcache,
-};
-
 static const struct tegra_smmu_soc tegra132_smmu_soc = {
         .clients = tegra124_mc_clients,
         .num_clients = ARRAY_SIZE(tegra124_mc_clients),
@@ -1059,7 +1030,6 @@ static const struct tegra_smmu_soc tegra132_smmu_soc = {
         .supports_round_robin_arbitration = true,
         .supports_request_limit = true,
         .num_asids = 128,
-        .ops = &tegra132_smmu_ops,
 };
 
 const struct tegra_mc_soc tegra132_mc_soc = {
diff --git a/drivers/memory/tegra/tegra30.c b/drivers/memory/tegra/tegra30.c
index 1abcd8f6f3ba..3cb30b69d95b 100644
--- a/drivers/memory/tegra/tegra30.c
+++ b/drivers/memory/tegra/tegra30.c
@@ -9,8 +9,6 @@
 #include <linux/of.h>
 #include <linux/mm.h>
 
-#include <asm/cacheflush.h>
-
 #include <dt-bindings/memory/tegra30-mc.h>
 
 #include "mc.h"
@@ -936,20 +934,6 @@ static const struct tegra_smmu_swgroup tegra30_swgroups[] = {
         { .name = "isp",  .swgroup = TEGRA_SWGROUP_ISP,  .reg = 0x258 },
 };
 
-static void tegra30_flush_dcache(struct page *page, unsigned long offset,
-                                 size_t size)
-{
-        phys_addr_t phys = page_to_phys(page) + offset;
-        void *virt = page_address(page) + offset;
-
-        __cpuc_flush_dcache_area(virt, size);
-        outer_flush_range(phys, phys + size);
-}
-
-static const struct tegra_smmu_ops tegra30_smmu_ops = {
-        .flush_dcache = tegra30_flush_dcache,
-};
-
 static const struct tegra_smmu_soc tegra30_smmu_soc = {
         .clients = tegra30_mc_clients,
         .num_clients = ARRAY_SIZE(tegra30_mc_clients),
@@ -958,7 +942,6 @@ static const struct tegra_smmu_soc tegra30_smmu_soc = {
         .supports_round_robin_arbitration = false,
         .supports_request_limit = false,
         .num_asids = 4,
-        .ops = &tegra30_smmu_ops,
 };
 
 const struct tegra_mc_soc tegra30_mc_soc = {
diff --git a/include/soc/tegra/mc.h b/include/soc/tegra/mc.h
index 1ab2813273cd..d6c3190ec852 100644
--- a/include/soc/tegra/mc.h
+++ b/include/soc/tegra/mc.h
@@ -51,11 +51,6 @@ struct tegra_smmu_swgroup {
         unsigned int reg;
 };
 
-struct tegra_smmu_ops {
-        void (*flush_dcache)(struct page *page, unsigned long offset,
-                             size_t size);
-};
-
 struct tegra_smmu_soc {
         const struct tegra_mc_client *clients;
         unsigned int num_clients;
@@ -67,8 +62,6 @@ struct tegra_smmu_soc {
         bool supports_request_limit;
 
         unsigned int num_asids;
-
-        const struct tegra_smmu_ops *ops;
 };
 
 struct tegra_mc;