[PATCH] drm/radeon: use gart for DMA IB tests

[Alex Deucher]

Use gart rather than vram to avoid having to deal with
the HDP cache.

Port of adfed2b0587289013f8143c54913ddfd44ac1fd3
(drm/radeon: use gart memory for DMA ring tests)
to the IB tests.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Cc: stable at vger.kernel.org
---
 drivers/gpu/drm/radeon/cik_sdma.c | 21 ++++++++++++---------
 drivers/gpu/drm/radeon/r600_dma.c | 20 ++++++++++----------
 2 files changed, 22 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/radeon/cik_sdma.c 
b/drivers/gpu/drm/radeon/cik_sdma.c
index 4e8432d..d748963 100644
--- a/drivers/gpu/drm/radeon/cik_sdma.c
+++ b/drivers/gpu/drm/radeon/cik_sdma.c
@@ -667,17 +667,20 @@ int cik_sdma_ib_test(struct radeon_device *rdev, struct 
radeon_ring *ring)
 {
        struct radeon_ib ib;
        unsigned i;
+       unsigned index;
        int r;
-       void __iomem *ptr = (void *)rdev->vram_scratch.ptr;
        u32 tmp = 0;
+       u64 gpu_addr;

-       if (!ptr) {
-               DRM_ERROR("invalid vram scratch pointer\n");
-               return -EINVAL;
-       }
+       if (ring->idx == R600_RING_TYPE_DMA_INDEX)
+               index = R600_WB_DMA_RING_TEST_OFFSET;
+       else
+               index = CAYMAN_WB_DMA1_RING_TEST_OFFSET;
+
+       gpu_addr = rdev->wb.gpu_addr + index;

        tmp = 0xCAFEDEAD;
-       writel(tmp, ptr);
+       rdev->wb.wb[index/4] = cpu_to_le32(tmp);

        r = radeon_ib_get(rdev, ring->idx, &ib, NULL, 256);
        if (r) {
@@ -686,8 +689,8 @@ int cik_sdma_ib_test(struct radeon_device *rdev, struct 
radeon_ring *ring)
        }

        ib.ptr[0] = SDMA_PACKET(SDMA_OPCODE_WRITE, 
SDMA_WRITE_SUB_OPCODE_LINEAR, 0);
-       ib.ptr[1] = rdev->vram_scratch.gpu_addr & 0xfffffffc;
-       ib.ptr[2] = upper_32_bits(rdev->vram_scratch.gpu_addr);
+       ib.ptr[1] = lower_32_bits(gpu_addr);
+       ib.ptr[2] = upper_32_bits(gpu_addr);
        ib.ptr[3] = 1;
        ib.ptr[4] = 0xDEADBEEF;
        ib.length_dw = 5;
@@ -704,7 +707,7 @@ int cik_sdma_ib_test(struct radeon_device *rdev, struct 
radeon_ring *ring)
                return r;
        }
        for (i = 0; i < rdev->usec_timeout; i++) {
-               tmp = readl(ptr);
+               tmp = le32_to_cpu(rdev->wb.wb[index/4]);
                if (tmp == 0xDEADBEEF)
                        break;
                DRM_UDELAY(1);
diff --git a/drivers/gpu/drm/radeon/r600_dma.c 
b/drivers/gpu/drm/radeon/r600_dma.c
index aabc343..cf0df45 100644
--- a/drivers/gpu/drm/radeon/r600_dma.c
+++ b/drivers/gpu/drm/radeon/r600_dma.c
@@ -338,17 +338,17 @@ int r600_dma_ib_test(struct radeon_device *rdev, struct 
radeon_ring *ring)
 {
        struct radeon_ib ib;
        unsigned i;
+       unsigned index;
        int r;
-       void __iomem *ptr = (void *)rdev->vram_scratch.ptr;
        u32 tmp = 0;
+       u64 gpu_addr;

-       if (!ptr) {
-               DRM_ERROR("invalid vram scratch pointer\n");
-               return -EINVAL;
-       }
+       if (ring->idx == R600_RING_TYPE_DMA_INDEX)
+               index = R600_WB_DMA_RING_TEST_OFFSET;
+       else
+               index = CAYMAN_WB_DMA1_RING_TEST_OFFSET;

-       tmp = 0xCAFEDEAD;
-       writel(tmp, ptr);
+       gpu_addr = rdev->wb.gpu_addr + index;

        r = radeon_ib_get(rdev, ring->idx, &ib, NULL, 256);
        if (r) {
@@ -357,8 +357,8 @@ int r600_dma_ib_test(struct radeon_device *rdev, struct 
radeon_ring *ring)
        }

        ib.ptr[0] = DMA_PACKET(DMA_PACKET_WRITE, 0, 0, 1);
-       ib.ptr[1] = rdev->vram_scratch.gpu_addr & 0xfffffffc;
-       ib.ptr[2] = upper_32_bits(rdev->vram_scratch.gpu_addr) & 0xff;
+       ib.ptr[1] = lower_32_bits(gpu_addr);
+       ib.ptr[2] = upper_32_bits(gpu_addr) & 0xff;
        ib.ptr[3] = 0xDEADBEEF;
        ib.length_dw = 4;

@@ -374,7 +374,7 @@ int r600_dma_ib_test(struct radeon_device *rdev, struct 
radeon_ring *ring)
                return r;
        }
        for (i = 0; i < rdev->usec_timeout; i++) {
-               tmp = readl(ptr);
+               tmp = le32_to_cpu(rdev->wb.wb[index/4]);
                if (tmp == 0xDEADBEEF)
                        break;
                DRM_UDELAY(1);
-- 
1.8.3.1