drm/radeon: Pass GART page flags to radeon_gart_set_page() explicitly

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/r100.c

@@ -682,7 +682,7 @@ 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));

drivers/gpu/drm/radeon/r300.c

@@ -69,17 +69,23 @@ void rv370_pcie_gart_tlb_flush(struct radeon_device *rdev)
 	mb();
 }
 
+#define R300_PTE_UNSNOOPED (1 << 0)
 #define R300_PTE_WRITEABLE (1 << 2)
 #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;
+		((upper_32_bits(addr) & 0xff) << 24);
+	if (flags & RADEON_GART_PAGE_READ)
+		addr |= R300_PTE_READABLE;
+	if (flags & RADEON_GART_PAGE_WRITE)
+		addr |= R300_PTE_WRITEABLE;
+	if (!(flags & RADEON_GART_PAGE_SNOOP))
+		addr |= R300_PTE_UNSNOOPED;
 	/* 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 */

drivers/gpu/drm/radeon/radeon.h

@@ -593,6 +593,12 @@ 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_DUMMY  0
+#define RADEON_GART_PAGE_VALID	(1 << 0)
+#define RADEON_GART_PAGE_READ	(1 << 1)
+#define RADEON_GART_PAGE_WRITE	(1 << 2)
+#define RADEON_GART_PAGE_SNOOP	(1 << 3)
+
 struct radeon_gart {
 	dma_addr_t			table_addr;
 	struct radeon_bo		*robj;
@@ -617,7 +623,7 @@ 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);
 
 
 /*
@@ -1784,7 +1790,7 @@ 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);
@@ -2745,7 +2751,7 @@ 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, f) (rdev)->asic->gart.set_page((rdev), (i), (p), (f))
 #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)))

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);
@@ -173,7 +173,7 @@ 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);
@@ -209,7 +209,7 @@ 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);
@@ -233,7 +233,7 @@ 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);

drivers/gpu/drm/radeon/radeon_gart.c

@@ -243,7 +243,8 @@ 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,
+							     RADEON_GART_PAGE_DUMMY);
 				}
 				page_base += RADEON_GPU_PAGE_SIZE;
 			}
@@ -261,13 +262,15 @@ void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset,
  * @pages: number of pages to bind
  * @pagelist: pages to bind
  * @dma_addr: DMA addresses of pages
+ * @flags: RADEON_GART_PAGE_* flags
  *
  * Binds the requested pages to the gart page table
  * (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 pages, struct page **pagelist, dma_addr_t *dma_addr,
+		     uint32_t flags)
 {
 	unsigned t;
 	unsigned p;
@@ -287,7 +290,7 @@ 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;
 			}
 		}

drivers/gpu/drm/radeon/radeon_ttm.c

@@ -521,6 +521,8 @@ static int radeon_ttm_backend_bind(struct ttm_tt *ttm,
 				   struct ttm_mem_reg *bo_mem)
 {
 	struct radeon_ttm_tt *gtt = (void*)ttm;
+	uint32_t flags = RADEON_GART_PAGE_VALID | RADEON_GART_PAGE_READ |
+		RADEON_GART_PAGE_WRITE;
 	int r;
 
 	gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
@@ -528,8 +530,10 @@ 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);
+	if (ttm->caching_state == tt_cached)
+		flags |= RADEON_GART_PAGE_SNOOP;
+	r = radeon_gart_bind(gtt->rdev, gtt->offset, ttm->num_pages,
+			     ttm->pages, gtt->ttm.dma_address, flags);
 	if (r) {
 		DRM_ERROR("failed to bind %lu pages at 0x%08X\n",
 			  ttm->num_pages, (unsigned)gtt->offset);

drivers/gpu/drm/radeon/rs400.c

@@ -208,17 +208,24 @@ void rs400_gart_fini(struct radeon_device *rdev)
 	radeon_gart_table_ram_free(rdev);
 }
 
+#define RS400_PTE_UNSNOOPED (1 << 0)
 #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;
+		((upper_32_bits(addr) & 0xff) << 4);
+	if (flags & RADEON_GART_PAGE_READ)
+		addr |= RS400_PTE_READABLE;
+	if (flags & RADEON_GART_PAGE_WRITE)
+		addr |= RS400_PTE_WRITEABLE;
+	if (!(flags & RADEON_GART_PAGE_SNOOP))
+		entry |= RS400_PTE_UNSNOOPED;
 	entry = cpu_to_le32(entry);
 	gtt[i] = entry;
 }

drivers/gpu/drm/radeon/rs600.c

@@ -625,15 +625,21 @@ 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
-		addr |= R600_PTE_GART;
+	addr |= R600_PTE_SYSTEM;
+	if (flags & RADEON_GART_PAGE_VALID)
+		addr |= R600_PTE_VALID;
+	if (flags & RADEON_GART_PAGE_READ)
+		addr |= R600_PTE_READABLE;
+	if (flags & RADEON_GART_PAGE_WRITE)
+		addr |= R600_PTE_WRITEABLE;
+	if (flags & RADEON_GART_PAGE_SNOOP)
+		addr |= R600_PTE_SNOOPED;
 	writeq(addr, ptr + (i * 8));
 }
 

include/uapi/drm/radeon_drm.h

@@ -796,7 +796,9 @@ struct drm_radeon_gem_info {
 	uint64_t	vram_visible;
 };
 
-#define RADEON_GEM_NO_BACKING_STORE 1
+#define RADEON_GEM_NO_BACKING_STORE	(1 << 0)
+#define RADEON_GEM_GTT_UC		(1 << 1)
+#define RADEON_GEM_GTT_WC		(1 << 2)
 
 struct drm_radeon_gem_create {
 	uint64_t	size;