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authorChristian König <christian.koenig@amd.com>2014-08-18 16:30:12 +0200
committerAlex Deucher <alexander.deucher@amd.com>2014-08-19 11:44:47 -0400
commit86302eeadebfab94530b00f5e53a23f911ff41e4 (patch)
tree1afe41ce63c5d440ae591971209bcd46502da346 /drivers/gpu
parent73ef0e0d62de4a8d40d34a6f645faee2f6e1ac33 (diff)
downloadlinux-stericsson-86302eeadebfab94530b00f5e53a23f911ff41e4.tar.gz
drm/radeon: Sync ME and PFP after CP semaphore waits v4
Fixes lockups due to CP read GPUVM faults when running piglit on Cape Verde. v2 (chk): apply the fix to R600+ as well, on CIK only the GFX CP has a PFP, add more comments to R600 code, enable flushing again v3: (agd5f): only apply to 7xx+. r6xx does not have the packet. v4: (agd5f): split flush change into a separate patch, fix formatting Signed-off-by: Michel Dänzer <michel.daenzer@amd.com> Signed-off-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Tested-by: Michel Dänzer <michel.daenzer@amd.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/radeon/cik.c17
-rw-r--r--drivers/gpu/drm/radeon/r600.c18
-rw-r--r--drivers/gpu/drm/radeon/r600d.h1
3 files changed, 36 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
index d61bc1841d5e..af2cbc647c73 100644
--- a/drivers/gpu/drm/radeon/cik.c
+++ b/drivers/gpu/drm/radeon/cik.c
@@ -3920,6 +3920,17 @@ void cik_fence_compute_ring_emit(struct radeon_device *rdev,
radeon_ring_write(ring, 0);
}
+/**
+ * cik_semaphore_ring_emit - emit a semaphore on the CP ring
+ *
+ * @rdev: radeon_device pointer
+ * @ring: radeon ring buffer object
+ * @semaphore: radeon semaphore object
+ * @emit_wait: Is this a sempahore wait?
+ *
+ * Emits a semaphore signal/wait packet to the CP ring and prevents the PFP
+ * from running ahead of semaphore waits.
+ */
bool cik_semaphore_ring_emit(struct radeon_device *rdev,
struct radeon_ring *ring,
struct radeon_semaphore *semaphore,
@@ -3932,6 +3943,12 @@ bool cik_semaphore_ring_emit(struct radeon_device *rdev,
radeon_ring_write(ring, lower_32_bits(addr));
radeon_ring_write(ring, (upper_32_bits(addr) & 0xffff) | sel);
+ if (emit_wait && ring->idx == RADEON_RING_TYPE_GFX_INDEX) {
+ /* Prevent the PFP from running ahead of the semaphore wait */
+ radeon_ring_write(ring, PACKET3(PACKET3_PFP_SYNC_ME, 0));
+ radeon_ring_write(ring, 0x0);
+ }
+
return true;
}
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 1e4770138fd4..e8bf0ea2dade 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -2753,6 +2753,17 @@ void r600_fence_ring_emit(struct radeon_device *rdev,
}
}
+/**
+ * r600_semaphore_ring_emit - emit a semaphore on the CP ring
+ *
+ * @rdev: radeon_device pointer
+ * @ring: radeon ring buffer object
+ * @semaphore: radeon semaphore object
+ * @emit_wait: Is this a sempahore wait?
+ *
+ * Emits a semaphore signal/wait packet to the CP ring and prevents the PFP
+ * from running ahead of semaphore waits.
+ */
bool r600_semaphore_ring_emit(struct radeon_device *rdev,
struct radeon_ring *ring,
struct radeon_semaphore *semaphore,
@@ -2768,6 +2779,13 @@ bool r600_semaphore_ring_emit(struct radeon_device *rdev,
radeon_ring_write(ring, lower_32_bits(addr));
radeon_ring_write(ring, (upper_32_bits(addr) & 0xff) | sel);
+ /* PFP_SYNC_ME packet only exists on 7xx+ */
+ if (emit_wait && (rdev->family >= CHIP_RV770)) {
+ /* Prevent the PFP from running ahead of the semaphore wait */
+ radeon_ring_write(ring, PACKET3(PACKET3_PFP_SYNC_ME, 0));
+ radeon_ring_write(ring, 0x0);
+ }
+
return true;
}
diff --git a/drivers/gpu/drm/radeon/r600d.h b/drivers/gpu/drm/radeon/r600d.h
index f94e7a9afe75..0c4a7d8d93e0 100644
--- a/drivers/gpu/drm/radeon/r600d.h
+++ b/drivers/gpu/drm/radeon/r600d.h
@@ -1597,6 +1597,7 @@
*/
# define PACKET3_CP_DMA_CMD_SAIC (1 << 28)
# define PACKET3_CP_DMA_CMD_DAIC (1 << 29)
+#define PACKET3_PFP_SYNC_ME 0x42 /* r7xx+ only */
#define PACKET3_SURFACE_SYNC 0x43
# define PACKET3_CB0_DEST_BASE_ENA (1 << 6)
# define PACKET3_FULL_CACHE_ENA (1 << 20) /* r7xx+ only */