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drm/amdgpu/gfx11: add a mutex for the gfx semaphore

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This will be used in more places in the future so
add a mutex.

Acked-by: Vitaly Prosyak <vitaly.prosyak@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2024-07-12 16:37:33 -04:00
parent b5be054c58
commit 76acba7b7f
3 changed files with 10 additions and 3 deletions
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1
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@ -4059,6 +4059,7 @@ int amdgpu_device_init(struct amdgpu_device *adev,
mutex_init(&adev->notifier_lock);
mutex_init(&adev->pm.stable_pstate_ctx_lock);
mutex_init(&adev->benchmark_mutex);
mutex_init(&adev->gfx.reset_sem_mutex);
amdgpu_device_init_apu_flags(adev);

2
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
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@ -444,6 +444,8 @@ struct amdgpu_gfx {
uint32_t *ip_dump_core;
uint32_t *ip_dump_compute_queues;
uint32_t *ip_dump_gfx_queues;
struct mutex reset_sem_mutex;
};
struct amdgpu_gfx_ras_reg_entry {

10
drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
View File

@ -4743,10 +4743,12 @@ static int gfx_v11_0_wait_for_idle(void *handle)
}
static int gfx_v11_0_request_gfx_index_mutex(struct amdgpu_device *adev,
int req)
bool req)
{
u32 i, tmp, val;
if (req)
mutex_lock(&adev->gfx.reset_sem_mutex);
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);
@ -4767,6 +4769,8 @@ static int gfx_v11_0_request_gfx_index_mutex(struct amdgpu_device *adev,
}
udelay(1);
}
if (!req)
mutex_unlock(&adev->gfx.reset_sem_mutex);
if (i >= adev->usec_timeout)
return -EINVAL;
@ -4814,7 +4818,7 @@ static int gfx_v11_0_soft_reset(void *handle)
mutex_unlock(&adev->srbm_mutex);
/* Try to acquire the gfx mutex before access to CP_VMID_RESET */
r = gfx_v11_0_request_gfx_index_mutex(adev, 1);
r = gfx_v11_0_request_gfx_index_mutex(adev, true);
if (r) {
DRM_ERROR("Failed to acquire the gfx mutex during soft reset\n");
return r;
@ -4829,7 +4833,7 @@ static int gfx_v11_0_soft_reset(void *handle)
RREG32_SOC15(GC, 0, regCP_VMID_RESET);
/* release the gfx mutex */
r = gfx_v11_0_request_gfx_index_mutex(adev, 0);
r = gfx_v11_0_request_gfx_index_mutex(adev, false);
if (r) {
DRM_ERROR("Failed to release the gfx mutex during soft reset\n");
return r;