diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c index bdcf96df69e6..2fbcd9765980 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c @@ -4474,11 +4474,43 @@ static int gfx_v11_0_wait_for_idle(void *handle) return -ETIMEDOUT; } +static int gfx_v11_0_request_gfx_index_mutex(struct amdgpu_device *adev, + int req) +{ + u32 i, tmp, val; + + for (i = 0; i < adev->usec_timeout; i++) { + /* Request with MeId=2, PipeId=0 */ + tmp = REG_SET_FIELD(0, CP_GFX_INDEX_MUTEX, REQUEST, req); + tmp = REG_SET_FIELD(tmp, CP_GFX_INDEX_MUTEX, CLIENTID, 4); + WREG32_SOC15(GC, 0, regCP_GFX_INDEX_MUTEX, tmp); + + val = RREG32_SOC15(GC, 0, regCP_GFX_INDEX_MUTEX); + if (req) { + if (val == tmp) + break; + } else { + tmp = REG_SET_FIELD(tmp, CP_GFX_INDEX_MUTEX, + REQUEST, 1); + + /* unlocked or locked by firmware */ + if (val != tmp) + break; + } + udelay(1); + } + + if (i >= adev->usec_timeout) + return -EINVAL; + + return 0; +} + static int gfx_v11_0_soft_reset(void *handle) { u32 grbm_soft_reset = 0; u32 tmp; - int i, j, k; + int r, i, j, k; struct amdgpu_device *adev = (struct amdgpu_device *)handle; tmp = RREG32_SOC15(GC, 0, regCP_INT_CNTL); @@ -4518,6 +4550,13 @@ static int gfx_v11_0_soft_reset(void *handle) } } + /* Try to acquire the gfx mutex before access to CP_VMID_RESET */ + r = gfx_v11_0_request_gfx_index_mutex(adev, 1); + if (r) { + DRM_ERROR("Failed to acquire the gfx mutex during soft reset\n"); + return r; + } + WREG32_SOC15(GC, 0, regCP_VMID_RESET, 0xfffffffe); // Read CP_VMID_RESET register three times. @@ -4526,6 +4565,13 @@ static int gfx_v11_0_soft_reset(void *handle) RREG32_SOC15(GC, 0, regCP_VMID_RESET); RREG32_SOC15(GC, 0, regCP_VMID_RESET); + /* release the gfx mutex */ + r = gfx_v11_0_request_gfx_index_mutex(adev, 0); + if (r) { + DRM_ERROR("Failed to release the gfx mutex during soft reset\n"); + return r; + } + for (i = 0; i < adev->usec_timeout; i++) { if (!RREG32_SOC15(GC, 0, regCP_HQD_ACTIVE) && !RREG32_SOC15(GC, 0, regCP_GFX_HQD_ACTIVE)) |