[PATCH 1/2] drm/radeon: add readonly flag to radeon_gart_set_page v3

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From: Christian König <christian.koenig@xxxxxxx>

v2: use flag instead of boolean
v3: keep R600_PTE_GART as it is

Signed-off-by: Christian König <christian.koenig@xxxxxxx>
---
 drivers/gpu/drm/radeon/r100.c        |  2 +-
 drivers/gpu/drm/radeon/r300.c        |  8 ++++++--
 drivers/gpu/drm/radeon/radeon.h      | 10 ++++++----
 drivers/gpu/drm/radeon/radeon_asic.h |  8 ++++----
 drivers/gpu/drm/radeon/radeon_gart.c |  9 +++++----
 drivers/gpu/drm/radeon/radeon_ttm.c  |  4 ++--
 drivers/gpu/drm/radeon/rs400.c       |  9 +++++++--
 drivers/gpu/drm/radeon/rs600.c       |  8 ++++++--
 8 files changed, 37 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index e32abf3..f58b5d1 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -650,7 +650,7 @@ void r100_pci_gart_disable(struct radeon_device *rdev)
 }
 
 void r100_pci_gart_set_page(struct radeon_device *rdev, unsigned i,
-			    uint64_t addr)
+			    uint64_t addr, uint32_t flags)
 {
 	u32 *gtt = rdev->gart.ptr;
 	gtt[i] = cpu_to_le32(lower_32_bits(addr));
diff --git a/drivers/gpu/drm/radeon/r300.c b/drivers/gpu/drm/radeon/r300.c
index 8d14e66..b947f42 100644
--- a/drivers/gpu/drm/radeon/r300.c
+++ b/drivers/gpu/drm/radeon/r300.c
@@ -73,13 +73,17 @@ void rv370_pcie_gart_tlb_flush(struct radeon_device *rdev)
 #define R300_PTE_READABLE  (1 << 3)
 
 void rv370_pcie_gart_set_page(struct radeon_device *rdev, unsigned i,
-			      uint64_t addr)
+			      uint64_t addr, uint32_t flags)
 {
 	void __iomem *ptr = rdev->gart.ptr;
 
 	addr = (lower_32_bits(addr) >> 8) |
 	       ((upper_32_bits(addr) & 0xff) << 24) |
-	       R300_PTE_WRITEABLE | R300_PTE_READABLE;
+	       R300_PTE_READABLE;
+
+	if (!(flags & RADEON_GART_PAGE_READONLY))
+		addr |= R300_PTE_WRITEABLE;
+
 	/* on x86 we want this to be CPU endian, on powerpc
 	 * on powerpc without HW swappers, it'll get swapped on way
 	 * into VRAM - so no need for cpu_to_le32 on VRAM tables */
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 7cda75d..8a190ce 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -592,6 +592,8 @@ struct radeon_mc;
 #define RADEON_GPU_PAGE_SHIFT 12
 #define RADEON_GPU_PAGE_ALIGN(a) (((a) + RADEON_GPU_PAGE_MASK) & ~RADEON_GPU_PAGE_MASK)
 
+#define RADEON_GART_PAGE_READONLY	1
+
 struct radeon_gart {
 	dma_addr_t			table_addr;
 	struct radeon_bo		*robj;
@@ -616,7 +618,7 @@ void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset,
 			int pages);
 int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,
 		     int pages, struct page **pagelist,
-		     dma_addr_t *dma_addr);
+		     dma_addr_t *dma_addr, uint32_t flags);
 
 
 /*
@@ -855,7 +857,7 @@ struct radeon_mec {
 
 /* flags used for GART page table entries on R600+ */
 #define R600_PTE_GART	( R600_PTE_VALID | R600_PTE_SYSTEM | R600_PTE_SNOOPED \
-			| R600_PTE_READABLE | R600_PTE_WRITEABLE)
+			| R600_PTE_READABLE | R600_PTE_WRITEABLE )
 
 struct radeon_vm_pt {
 	struct radeon_bo		*bo;
@@ -1775,7 +1777,7 @@ struct radeon_asic {
 	struct {
 		void (*tlb_flush)(struct radeon_device *rdev);
 		void (*set_page)(struct radeon_device *rdev, unsigned i,
-				 uint64_t addr);
+				 uint64_t addr, uint32_t flags);
 	} gart;
 	struct {
 		int (*init)(struct radeon_device *rdev);
@@ -2735,7 +2737,7 @@ void radeon_ring_write(struct radeon_ring *ring, uint32_t v);
 #define radeon_vga_set_state(rdev, state) (rdev)->asic->vga_set_state((rdev), (state))
 #define radeon_asic_reset(rdev) (rdev)->asic->asic_reset((rdev))
 #define radeon_gart_tlb_flush(rdev) (rdev)->asic->gart.tlb_flush((rdev))
-#define radeon_gart_set_page(rdev, i, p) (rdev)->asic->gart.set_page((rdev), (i), (p))
+#define radeon_gart_set_page(rdev, i, p, r) (rdev)->asic->gart.set_page((rdev), (i), (p), (r))
 #define radeon_asic_vm_init(rdev) (rdev)->asic->vm.init((rdev))
 #define radeon_asic_vm_fini(rdev) (rdev)->asic->vm.fini((rdev))
 #define radeon_asic_vm_set_page(rdev, ib, pe, addr, count, incr, flags) ((rdev)->asic->vm.set_page((rdev), (ib), (pe), (addr), (count), (incr), (flags)))
diff --git a/drivers/gpu/drm/radeon/radeon_asic.h b/drivers/gpu/drm/radeon/radeon_asic.h
index 7531b5e..f7d7c33 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -68,7 +68,7 @@ int r100_asic_reset(struct radeon_device *rdev);
 u32 r100_get_vblank_counter(struct radeon_device *rdev, int crtc);
 void r100_pci_gart_tlb_flush(struct radeon_device *rdev);
 void r100_pci_gart_set_page(struct radeon_device *rdev, unsigned i,
-			    uint64_t addr);
+			    uint64_t addr, uint32_t flags);
 void r100_ring_start(struct radeon_device *rdev, struct radeon_ring *ring);
 int r100_irq_set(struct radeon_device *rdev);
 int r100_irq_process(struct radeon_device *rdev);
@@ -172,7 +172,7 @@ extern void r300_fence_ring_emit(struct radeon_device *rdev,
 extern int r300_cs_parse(struct radeon_cs_parser *p);
 extern void rv370_pcie_gart_tlb_flush(struct radeon_device *rdev);
 extern void rv370_pcie_gart_set_page(struct radeon_device *rdev, unsigned i,
-				     uint64_t addr);
+				     uint64_t addr, uint32_t flags);
 extern void rv370_set_pcie_lanes(struct radeon_device *rdev, int lanes);
 extern int rv370_get_pcie_lanes(struct radeon_device *rdev);
 extern void r300_set_reg_safe(struct radeon_device *rdev);
@@ -208,7 +208,7 @@ extern int rs400_suspend(struct radeon_device *rdev);
 extern int rs400_resume(struct radeon_device *rdev);
 void rs400_gart_tlb_flush(struct radeon_device *rdev);
 void rs400_gart_set_page(struct radeon_device *rdev, unsigned i,
-			 uint64_t addr);
+			 uint64_t addr, uint32_t flags);
 uint32_t rs400_mc_rreg(struct radeon_device *rdev, uint32_t reg);
 void rs400_mc_wreg(struct radeon_device *rdev, uint32_t reg, uint32_t v);
 int rs400_gart_init(struct radeon_device *rdev);
@@ -232,7 +232,7 @@ void rs600_irq_disable(struct radeon_device *rdev);
 u32 rs600_get_vblank_counter(struct radeon_device *rdev, int crtc);
 void rs600_gart_tlb_flush(struct radeon_device *rdev);
 void rs600_gart_set_page(struct radeon_device *rdev, unsigned i,
-			 uint64_t addr);
+			 uint64_t addr, uint32_t flags);
 uint32_t rs600_mc_rreg(struct radeon_device *rdev, uint32_t reg);
 void rs600_mc_wreg(struct radeon_device *rdev, uint32_t reg, uint32_t v);
 void rs600_bandwidth_update(struct radeon_device *rdev);
diff --git a/drivers/gpu/drm/radeon/radeon_gart.c b/drivers/gpu/drm/radeon/radeon_gart.c
index b7d3e84..b26c0b2 100644
--- a/drivers/gpu/drm/radeon/radeon_gart.c
+++ b/drivers/gpu/drm/radeon/radeon_gart.c
@@ -243,7 +243,7 @@ void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset,
 			page_base = rdev->gart.pages_addr[p];
 			for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
 				if (rdev->gart.ptr) {
-					radeon_gart_set_page(rdev, t, page_base);
+					radeon_gart_set_page(rdev, t, page_base, 0);
 				}
 				page_base += RADEON_GPU_PAGE_SIZE;
 			}
@@ -266,8 +266,9 @@ void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset,
  * (all asics).
  * Returns 0 for success, -EINVAL for failure.
  */
-int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,
-		     int pages, struct page **pagelist, dma_addr_t *dma_addr)
+int radeon_gart_bind(struct radeon_device *rdev, unsigned offset, int pages,
+		     struct page **pagelist, dma_addr_t *dma_addr,
+		     uint32_t flags)
 {
 	unsigned t;
 	unsigned p;
@@ -287,7 +288,7 @@ int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,
 		if (rdev->gart.ptr) {
 			page_base = rdev->gart.pages_addr[p];
 			for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
-				radeon_gart_set_page(rdev, t, page_base);
+				radeon_gart_set_page(rdev, t, page_base, flags);
 				page_base += RADEON_GPU_PAGE_SIZE;
 			}
 		}
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index c8a8a51..19d662f 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -528,8 +528,8 @@ static int radeon_ttm_backend_bind(struct ttm_tt *ttm,
 		WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
 		     ttm->num_pages, bo_mem, ttm);
 	}
-	r = radeon_gart_bind(gtt->rdev, gtt->offset,
-			     ttm->num_pages, ttm->pages, gtt->ttm.dma_address);
+	r = radeon_gart_bind(gtt->rdev, gtt->offset, ttm->num_pages,
+			     ttm->pages, gtt->ttm.dma_address, 0);
 	if (r) {
 		DRM_ERROR("failed to bind %lu pages at 0x%08X\n",
 			  ttm->num_pages, (unsigned)gtt->offset);
diff --git a/drivers/gpu/drm/radeon/rs400.c b/drivers/gpu/drm/radeon/rs400.c
index 4519f9c..5164544 100644
--- a/drivers/gpu/drm/radeon/rs400.c
+++ b/drivers/gpu/drm/radeon/rs400.c
@@ -211,14 +211,19 @@ void rs400_gart_fini(struct radeon_device *rdev)
 #define RS400_PTE_WRITEABLE (1 << 2)
 #define RS400_PTE_READABLE  (1 << 3)
 
-void rs400_gart_set_page(struct radeon_device *rdev, unsigned i, uint64_t addr)
+void rs400_gart_set_page(struct radeon_device *rdev, unsigned i,
+			 uint64_t addr, uint32_t flags)
 {
 	uint32_t entry;
 	u32 *gtt = rdev->gart.ptr;
 
 	entry = (lower_32_bits(addr) & PAGE_MASK) |
 		((upper_32_bits(addr) & 0xff) << 4) |
-		RS400_PTE_WRITEABLE | RS400_PTE_READABLE;
+		RS400_PTE_READABLE;
+
+	if (!(flags & RADEON_GART_PAGE_READONLY))
+		entry |= RS400_PTE_WRITEABLE;
+
 	entry = cpu_to_le32(entry);
 	gtt[i] = entry;
 }
diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c
index cd7b4b0..cb487c7 100644
--- a/drivers/gpu/drm/radeon/rs600.c
+++ b/drivers/gpu/drm/radeon/rs600.c
@@ -611,15 +611,19 @@ static void rs600_gart_fini(struct radeon_device *rdev)
 	radeon_gart_table_vram_free(rdev);
 }
 
-void rs600_gart_set_page(struct radeon_device *rdev, unsigned i, uint64_t addr)
+void rs600_gart_set_page(struct radeon_device *rdev, unsigned i,
+			 uint64_t addr, uint32_t flags)
 {
 	void __iomem *ptr = (void *)rdev->gart.ptr;
 
 	addr = addr & 0xFFFFFFFFFFFFF000ULL;
 	if (addr == rdev->dummy_page.addr)
 		addr |= R600_PTE_SYSTEM | R600_PTE_SNOOPED;
-	else
+	else {
 		addr |= R600_PTE_GART;
+		if (flags & RADEON_GART_PAGE_READONLY)
+			addr &= ~R600_PTE_WRITEABLE;
+	}
 	writeq(addr, ptr + (i * 8));
 }
 
-- 
1.9.1

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