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drm/radeon/cik: use a mutex to properly lock srbm instanced registers

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We need proper locking in the driver when accessing instanced
registers on CIK.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2013-08-06 12:40:16 -04:00
parent 3744b248f9
commit f61d5b4677
3 changed files with 13 additions and 0 deletions
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10
drivers/gpu/drm/radeon/cik.c
View File

@ -2587,9 +2587,11 @@ u32 cik_compute_ring_get_rptr(struct radeon_device *rdev,
if (rdev->wb.enabled) {
rptr = le32_to_cpu(rdev->wb.wb[ring->rptr_offs/4]);
} else {
mutex_lock(&rdev->srbm_mutex);
cik_srbm_select(rdev, ring->me, ring->pipe, ring->queue, 0);
rptr = RREG32(CP_HQD_PQ_RPTR);
cik_srbm_select(rdev, 0, 0, 0, 0);
mutex_unlock(&rdev->srbm_mutex);
}
rptr = (rptr & ring->ptr_reg_mask) >> ring->ptr_reg_shift;
@ -2604,9 +2606,11 @@ u32 cik_compute_ring_get_wptr(struct radeon_device *rdev,
if (rdev->wb.enabled) {
wptr = le32_to_cpu(rdev->wb.wb[ring->wptr_offs/4]);
} else {
mutex_lock(&rdev->srbm_mutex);
cik_srbm_select(rdev, ring->me, ring->pipe, ring->queue, 0);
wptr = RREG32(CP_HQD_PQ_WPTR);
cik_srbm_select(rdev, 0, 0, 0, 0);
mutex_unlock(&rdev->srbm_mutex);
}
wptr = (wptr & ring->ptr_reg_mask) >> ring->ptr_reg_shift;
@ -2897,6 +2901,7 @@ static int cik_cp_compute_resume(struct radeon_device *rdev)
WREG32(CP_CPF_DEBUG, tmp);
/* init the pipes */
mutex_lock(&rdev->srbm_mutex);
for (i = 0; i < (rdev->mec.num_pipe * rdev->mec.num_mec); i++) {
int me = (i < 4) ? 1 : 2;
int pipe = (i < 4) ? i : (i - 4);
@ -2919,6 +2924,7 @@ static int cik_cp_compute_resume(struct radeon_device *rdev)
WREG32(CP_HPD_EOP_CONTROL, tmp);
}
cik_srbm_select(rdev, 0, 0, 0, 0);
mutex_unlock(&rdev->srbm_mutex);
/* init the queues. Just two for now. */
for (i = 0; i < 2; i++) {
@ -2972,6 +2978,7 @@ static int cik_cp_compute_resume(struct radeon_device *rdev)
mqd->static_thread_mgmt23[0] = 0xffffffff;
mqd->static_thread_mgmt23[1] = 0xffffffff;
mutex_lock(&rdev->srbm_mutex);
cik_srbm_select(rdev, rdev->ring[idx].me,
rdev->ring[idx].pipe,
rdev->ring[idx].queue, 0);
@ -3099,6 +3106,7 @@ static int cik_cp_compute_resume(struct radeon_device *rdev)
WREG32(CP_HQD_ACTIVE, mqd->queue_state.cp_hqd_active);
cik_srbm_select(rdev, 0, 0, 0, 0);
mutex_unlock(&rdev->srbm_mutex);
radeon_bo_kunmap(rdev->ring[idx].mqd_obj);
radeon_bo_unreserve(rdev->ring[idx].mqd_obj);
@ -4320,6 +4328,7 @@ static int cik_pcie_gart_enable(struct radeon_device *rdev)
/* XXX SH_MEM regs */
/* where to put LDS, scratch, GPUVM in FSA64 space */
mutex_lock(&rdev->srbm_mutex);
for (i = 0; i < 16; i++) {
cik_srbm_select(rdev, 0, 0, 0, i);
/* CP and shaders */
@ -4335,6 +4344,7 @@ static int cik_pcie_gart_enable(struct radeon_device *rdev)
/* XXX SDMA RLC - todo */
}
cik_srbm_select(rdev, 0, 0, 0, 0);
mutex_unlock(&rdev->srbm_mutex);
cik_pcie_gart_tlb_flush(rdev);
DRM_INFO("PCIE GART of %uM enabled (table at 0x%016llX).\n",

2
drivers/gpu/drm/radeon/radeon.h
View File

@ -2095,6 +2095,8 @@ struct radeon_device {
/* ACPI interface */
struct radeon_atif atif;
struct radeon_atcs atcs;
/* srbm instance registers */
struct mutex srbm_mutex;
};
int radeon_device_init(struct radeon_device *rdev,

1
drivers/gpu/drm/radeon/radeon_device.c
View File

@ -1163,6 +1163,7 @@ int radeon_device_init(struct radeon_device *rdev,
mutex_init(&rdev->gem.mutex);
mutex_init(&rdev->pm.mutex);
mutex_init(&rdev->gpu_clock_mutex);
mutex_init(&rdev->srbm_mutex);
init_rwsem(&rdev->pm.mclk_lock);
init_rwsem(&rdev->exclusive_lock);
init_waitqueue_head(&rdev->irq.vblank_queue);