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authorAlex Deucher <alexander.deucher@amd.com>2013-01-03 12:40:13 -0500
committerAlex Deucher <alexander.deucher@amd.com>2013-01-03 21:28:49 -0500
commit0ecebb9e0d14e9948e0b1529883a776758117d6f (patch)
treeb6e5cd151cf5c882a7d05fde8e0c35ee756cb60e /drivers/gpu
parent71e3d1578c954cf29f1f4db1c8930d3574025eb0 (diff)
drm/radeon: switch to a finer grained reset for evergreen
No change in functionality as we currently set all the reset flags. Reviewed-by: Jerome Glisse <jglisse@redhat.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/radeon/evergreen.c80
-rw-r--r--drivers/gpu/drm/radeon/evergreend.h1
2 files changed, 56 insertions, 25 deletions
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index dcdff14dc13f..061fa0a28900 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -2306,15 +2306,13 @@ bool evergreen_gpu_is_lockup(struct radeon_device *rdev, struct radeon_ring *rin
return radeon_ring_test_lockup(rdev, ring);
}
-static int evergreen_gpu_soft_reset(struct radeon_device *rdev)
+static void evergreen_gpu_soft_reset_gfx(struct radeon_device *rdev)
{
- struct evergreen_mc_save save;
- u32 grbm_reset = 0, tmp;
+ u32 grbm_reset = 0;
if (!(RREG32(GRBM_STATUS) & GUI_ACTIVE))
- return 0;
+ return;
- dev_info(rdev->dev, "GPU softreset \n");
dev_info(rdev->dev, " GRBM_STATUS = 0x%08X\n",
RREG32(GRBM_STATUS));
dev_info(rdev->dev, " GRBM_STATUS_SE0 = 0x%08X\n",
@@ -2331,27 +2329,10 @@ static int evergreen_gpu_soft_reset(struct radeon_device *rdev)
RREG32(CP_BUSY_STAT));
dev_info(rdev->dev, " R_008680_CP_STAT = 0x%08X\n",
RREG32(CP_STAT));
- dev_info(rdev->dev, " R_00D034_DMA_STATUS_REG = 0x%08X\n",
- RREG32(DMA_STATUS_REG));
- evergreen_mc_stop(rdev, &save);
- if (evergreen_mc_wait_for_idle(rdev)) {
- dev_warn(rdev->dev, "Wait for MC idle timedout !\n");
- }
/* Disable CP parsing/prefetching */
WREG32(CP_ME_CNTL, CP_ME_HALT | CP_PFP_HALT);
- /* Disable DMA */
- tmp = RREG32(DMA_RB_CNTL);
- tmp &= ~DMA_RB_ENABLE;
- WREG32(DMA_RB_CNTL, tmp);
-
- /* Reset dma */
- WREG32(SRBM_SOFT_RESET, SOFT_RESET_DMA);
- RREG32(SRBM_SOFT_RESET);
- udelay(50);
- WREG32(SRBM_SOFT_RESET, 0);
-
/* reset all the gfx blocks */
grbm_reset = (SOFT_RESET_CP |
SOFT_RESET_CB |
@@ -2372,8 +2353,7 @@ static int evergreen_gpu_soft_reset(struct radeon_device *rdev)
udelay(50);
WREG32(GRBM_SOFT_RESET, 0);
(void)RREG32(GRBM_SOFT_RESET);
- /* Wait a little for things to settle down */
- udelay(50);
+
dev_info(rdev->dev, " GRBM_STATUS = 0x%08X\n",
RREG32(GRBM_STATUS));
dev_info(rdev->dev, " GRBM_STATUS_SE0 = 0x%08X\n",
@@ -2390,15 +2370,65 @@ static int evergreen_gpu_soft_reset(struct radeon_device *rdev)
RREG32(CP_BUSY_STAT));
dev_info(rdev->dev, " R_008680_CP_STAT = 0x%08X\n",
RREG32(CP_STAT));
+}
+
+static void evergreen_gpu_soft_reset_dma(struct radeon_device *rdev)
+{
+ u32 tmp;
+
+ if (RREG32(DMA_STATUS_REG) & DMA_IDLE)
+ return;
+
+ dev_info(rdev->dev, " R_00D034_DMA_STATUS_REG = 0x%08X\n",
+ RREG32(DMA_STATUS_REG));
+
+ /* Disable DMA */
+ tmp = RREG32(DMA_RB_CNTL);
+ tmp &= ~DMA_RB_ENABLE;
+ WREG32(DMA_RB_CNTL, tmp);
+
+ /* Reset dma */
+ WREG32(SRBM_SOFT_RESET, SOFT_RESET_DMA);
+ RREG32(SRBM_SOFT_RESET);
+ udelay(50);
+ WREG32(SRBM_SOFT_RESET, 0);
+
dev_info(rdev->dev, " R_00D034_DMA_STATUS_REG = 0x%08X\n",
RREG32(DMA_STATUS_REG));
+}
+
+static int evergreen_gpu_soft_reset(struct radeon_device *rdev, u32 reset_mask)
+{
+ struct evergreen_mc_save save;
+
+ if (reset_mask == 0)
+ return 0;
+
+ dev_info(rdev->dev, "GPU softreset: 0x%08X\n", reset_mask);
+
+ evergreen_mc_stop(rdev, &save);
+ if (evergreen_mc_wait_for_idle(rdev)) {
+ dev_warn(rdev->dev, "Wait for MC idle timedout !\n");
+ }
+
+ if (reset_mask & (RADEON_RESET_GFX | RADEON_RESET_COMPUTE))
+ evergreen_gpu_soft_reset_gfx(rdev);
+
+ if (reset_mask & RADEON_RESET_DMA)
+ evergreen_gpu_soft_reset_dma(rdev);
+
+ /* Wait a little for things to settle down */
+ udelay(50);
+
evergreen_mc_resume(rdev, &save);
return 0;
}
int evergreen_asic_reset(struct radeon_device *rdev)
{
- return evergreen_gpu_soft_reset(rdev);
+ return evergreen_gpu_soft_reset(rdev, (RADEON_RESET_GFX |
+ RADEON_RESET_COMPUTE |
+ RADEON_RESET_DMA));
}
/* Interrupts */
diff --git a/drivers/gpu/drm/radeon/evergreend.h b/drivers/gpu/drm/radeon/evergreend.h
index 5786a32e7bda..0bfd0e9e469b 100644
--- a/drivers/gpu/drm/radeon/evergreend.h
+++ b/drivers/gpu/drm/radeon/evergreend.h
@@ -2037,5 +2037,6 @@
# define DMA_RPTR_WRITEBACK_SWAP_ENABLE (1 << 13) /* 8IN32 */
# define DMA_RPTR_WRITEBACK_TIMER(x) ((x) << 16) /* log2 */
#define DMA_STATUS_REG 0xd034
+# define DMA_IDLE (1 << 0)
#endif

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