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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>
This commit is contained in:
Alex Deucher 2013-01-03 12:40:13 -05:00
parent 71e3d1578c
commit 0ecebb9e0d
2 changed files with 56 additions and 25 deletions
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80
drivers/gpu/drm/radeon/evergreen.c
View File

@ -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 */

1
drivers/gpu/drm/radeon/evergreend.h
View File

@ -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