[PATCH 02/11] drm/amdgpu: rework gmc_v10_0_flush_gpu_tlb
Christian König
ckoenig.leichtzumerken at gmail.com
Tue Sep 5 06:04:06 UTC 2023
Move the SDMA workaround necessary for Navi 1x into a higher layer.
Signed-off-by: Christian König <christian.koenig at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 48 +++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h | 5 +-
drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.c | 3 +
drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c | 159 ++++++-----------------
4 files changed, 97 insertions(+), 118 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
index d78bd9732543..857051093900 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
@@ -575,6 +575,54 @@ int amdgpu_gmc_allocate_vm_inv_eng(struct amdgpu_device *adev)
return 0;
}
+void amdgpu_gmc_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
+ uint32_t vmhub, uint32_t flush_type)
+{
+ struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
+ struct amdgpu_vmhub *hub = &adev->vmhub[vmhub];
+ struct dma_fence *fence;
+ struct amdgpu_job *job;
+ int r;
+
+ if (!hub->sdma_invalidation_workaround || vmid ||
+ !adev->mman.buffer_funcs_enabled ||
+ !adev->ib_pool_ready || amdgpu_in_reset(adev) ||
+ !ring->sched.ready) {
+ adev->gmc.gmc_funcs->flush_gpu_tlb(adev, vmid, vmhub,
+ flush_type);
+ return;
+ }
+
+ /* The SDMA on Navi 1x has a bug which can theoretically result in memory
+ * corruption if an invalidation happens at the same time as an VA
+ * translation. Avoid this by doing the invalidation from the SDMA
+ * itself at least for GART.
+ */
+ mutex_lock(&adev->mman.gtt_window_lock);
+ r = amdgpu_job_alloc_with_ib(ring->adev, &adev->mman.high_pr,
+ AMDGPU_FENCE_OWNER_UNDEFINED,
+ 16 * 4, AMDGPU_IB_POOL_IMMEDIATE,
+ &job);
+ if (r)
+ goto error_alloc;
+
+ job->vm_pd_addr = amdgpu_gmc_pd_addr(adev->gart.bo);
+ job->vm_needs_flush = true;
+ job->ibs->ptr[job->ibs->length_dw++] = ring->funcs->nop;
+ amdgpu_ring_pad_ib(ring, &job->ibs[0]);
+ fence = amdgpu_job_submit(job);
+ mutex_unlock(&adev->mman.gtt_window_lock);
+
+ dma_fence_wait(fence, false);
+ dma_fence_put(fence);
+
+ return;
+
+error_alloc:
+ mutex_unlock(&adev->mman.gtt_window_lock);
+ DRM_ERROR("Error flushing GPU TLB using the SDMA (%d)!\n", r);
+}
+
/**
* amdgpu_gmc_tmz_set -- check and set if a device supports TMZ
* @adev: amdgpu_device pointer
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
index fdc25cd559b6..9e7df2f69123 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
@@ -117,6 +117,8 @@ struct amdgpu_vmhub {
uint32_t vm_contexts_disable;
+ bool sdma_invalidation_workaround;
+
const struct amdgpu_vmhub_funcs *vmhub_funcs;
};
@@ -335,7 +337,6 @@ struct amdgpu_gmc {
u64 noretry_flags;
};
-#define amdgpu_gmc_flush_gpu_tlb(adev, vmid, vmhub, type) ((adev)->gmc.gmc_funcs->flush_gpu_tlb((adev), (vmid), (vmhub), (type)))
#define amdgpu_gmc_flush_gpu_tlb_pasid(adev, pasid, type, allhub, inst) \
((adev)->gmc.gmc_funcs->flush_gpu_tlb_pasid \
((adev), (pasid), (type), (allhub), (inst)))
@@ -401,6 +402,8 @@ int amdgpu_gmc_ras_sw_init(struct amdgpu_device *adev);
int amdgpu_gmc_ras_late_init(struct amdgpu_device *adev);
void amdgpu_gmc_ras_fini(struct amdgpu_device *adev);
int amdgpu_gmc_allocate_vm_inv_eng(struct amdgpu_device *adev);
+void amdgpu_gmc_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
+ uint32_t vmhub, uint32_t flush_type);
extern void amdgpu_gmc_tmz_set(struct amdgpu_device *adev);
extern void amdgpu_gmc_noretry_set(struct amdgpu_device *adev);
diff --git a/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.c b/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.c
index a041c6c970e1..8521c45e8f38 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.c
@@ -471,6 +471,9 @@ static void gfxhub_v2_0_init(struct amdgpu_device *adev)
GCVM_CONTEXT1_CNTL__WRITE_PROTECTION_FAULT_ENABLE_INTERRUPT_MASK |
GCVM_CONTEXT1_CNTL__EXECUTE_PROTECTION_FAULT_ENABLE_INTERRUPT_MASK;
+ /* TODO: This is only needed on some Navi 1x revisions */
+ hub->sdma_invalidation_workaround = true;
+
hub->vmhub_funcs = &gfxhub_v2_0_vmhub_funcs;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
index fa87a85e1017..1f70c57bcd69 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
@@ -230,20 +230,49 @@ static bool gmc_v10_0_get_atc_vmid_pasid_mapping_info(
* by the amdgpu vm/hsa code.
*/
-static void gmc_v10_0_flush_vm_hub(struct amdgpu_device *adev, uint32_t vmid,
- unsigned int vmhub, uint32_t flush_type)
+/**
+ * gmc_v10_0_flush_gpu_tlb - gart tlb flush callback
+ *
+ * @adev: amdgpu_device pointer
+ * @vmid: vm instance to flush
+ * @vmhub: vmhub type
+ * @flush_type: the flush type
+ *
+ * Flush the TLB for the requested page table.
+ */
+static void gmc_v10_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
+ uint32_t vmhub, uint32_t flush_type)
{
bool use_semaphore = gmc_v10_0_use_invalidate_semaphore(adev, vmhub);
struct amdgpu_vmhub *hub = &adev->vmhub[vmhub];
u32 inv_req = hub->vmhub_funcs->get_invalidate_req(vmid, flush_type);
- u32 tmp;
/* Use register 17 for GART */
const unsigned int eng = 17;
- unsigned int i;
unsigned char hub_ip = 0;
+ u32 sem, req, ack;
+ unsigned int i;
+ u32 tmp;
- hub_ip = (vmhub == AMDGPU_GFXHUB(0)) ?
- GC_HWIP : MMHUB_HWIP;
+ sem = hub->vm_inv_eng0_sem + hub->eng_distance * eng;
+ req = hub->vm_inv_eng0_req + hub->eng_distance * eng;
+ ack = hub->vm_inv_eng0_ack + hub->eng_distance * eng;
+
+ /* flush hdp cache */
+ adev->hdp.funcs->flush_hdp(adev, NULL);
+
+ /* For SRIOV run time, driver shouldn't access the register through MMIO
+ * Directly use kiq to do the vm invalidation instead
+ */
+ if (adev->gfx.kiq[0].ring.sched.ready && !adev->enable_mes &&
+ (amdgpu_sriov_runtime(adev) || !amdgpu_sriov_vf(adev)) &&
+ down_read_trylock(&adev->reset_domain->sem)) {
+ amdgpu_virt_kiq_reg_write_reg_wait(adev, req, ack, inv_req,
+ 1 << vmid);
+ up_read(&adev->reset_domain->sem);
+ return;
+ }
+
+ hub_ip = (vmhub == AMDGPU_GFXHUB(0)) ? GC_HWIP : MMHUB_HWIP;
spin_lock(&adev->gmc.invalidate_lock);
/*
@@ -257,9 +286,7 @@ static void gmc_v10_0_flush_vm_hub(struct amdgpu_device *adev, uint32_t vmid,
if (use_semaphore) {
for (i = 0; i < adev->usec_timeout; i++) {
/* a read return value of 1 means semaphore acuqire */
- tmp = RREG32_RLC_NO_KIQ(hub->vm_inv_eng0_sem +
- hub->eng_distance * eng, hub_ip);
-
+ tmp = RREG32_RLC_NO_KIQ(sem, hub_ip);
if (tmp & 0x1)
break;
udelay(1);
@@ -269,9 +296,7 @@ static void gmc_v10_0_flush_vm_hub(struct amdgpu_device *adev, uint32_t vmid,
DRM_ERROR("Timeout waiting for sem acquire in VM flush!\n");
}
- WREG32_RLC_NO_KIQ(hub->vm_inv_eng0_req +
- hub->eng_distance * eng,
- inv_req, hub_ip);
+ WREG32_RLC_NO_KIQ(req, inv_req, hub_ip);
/*
* Issue a dummy read to wait for the ACK register to be cleared
@@ -279,14 +304,11 @@ static void gmc_v10_0_flush_vm_hub(struct amdgpu_device *adev, uint32_t vmid,
*/
if ((vmhub == AMDGPU_GFXHUB(0)) &&
(adev->ip_versions[GC_HWIP][0] < IP_VERSION(10, 3, 0)))
- RREG32_RLC_NO_KIQ(hub->vm_inv_eng0_req +
- hub->eng_distance * eng, hub_ip);
+ RREG32_RLC_NO_KIQ(req, hub_ip);
/* Wait for ACK with a delay.*/
for (i = 0; i < adev->usec_timeout; i++) {
- tmp = RREG32_RLC_NO_KIQ(hub->vm_inv_eng0_ack +
- hub->eng_distance * eng, hub_ip);
-
+ tmp = RREG32_RLC_NO_KIQ(ack, hub_ip);
tmp &= 1 << vmid;
if (tmp)
break;
@@ -296,109 +318,12 @@ static void gmc_v10_0_flush_vm_hub(struct amdgpu_device *adev, uint32_t vmid,
/* TODO: It needs to continue working on debugging with semaphore for GFXHUB as well. */
if (use_semaphore)
- /*
- * add semaphore release after invalidation,
- * write with 0 means semaphore release
- */
- WREG32_RLC_NO_KIQ(hub->vm_inv_eng0_sem +
- hub->eng_distance * eng, 0, hub_ip);
+ WREG32_RLC_NO_KIQ(sem, 0, hub_ip);
spin_unlock(&adev->gmc.invalidate_lock);
- if (i < adev->usec_timeout)
- return;
-
- DRM_ERROR("Timeout waiting for VM flush hub: %d!\n", vmhub);
-}
-
-/**
- * gmc_v10_0_flush_gpu_tlb - gart tlb flush callback
- *
- * @adev: amdgpu_device pointer
- * @vmid: vm instance to flush
- * @vmhub: vmhub type
- * @flush_type: the flush type
- *
- * Flush the TLB for the requested page table.
- */
-static void gmc_v10_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
- uint32_t vmhub, uint32_t flush_type)
-{
- struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
- struct dma_fence *fence;
- struct amdgpu_job *job;
-
- int r;
-
- /* flush hdp cache */
- adev->hdp.funcs->flush_hdp(adev, NULL);
-
- /* For SRIOV run time, driver shouldn't access the register through MMIO
- * Directly use kiq to do the vm invalidation instead
- */
- if (adev->gfx.kiq[0].ring.sched.ready && !adev->enable_mes &&
- (amdgpu_sriov_runtime(adev) || !amdgpu_sriov_vf(adev)) &&
- down_read_trylock(&adev->reset_domain->sem)) {
- struct amdgpu_vmhub *hub = &adev->vmhub[vmhub];
- const unsigned int eng = 17;
- u32 inv_req = hub->vmhub_funcs->get_invalidate_req(vmid, flush_type);
- u32 req = hub->vm_inv_eng0_req + hub->eng_distance * eng;
- u32 ack = hub->vm_inv_eng0_ack + hub->eng_distance * eng;
-
- amdgpu_virt_kiq_reg_write_reg_wait(adev, req, ack, inv_req,
- 1 << vmid);
-
- up_read(&adev->reset_domain->sem);
- return;
- }
-
- mutex_lock(&adev->mman.gtt_window_lock);
-
- if (vmhub == AMDGPU_MMHUB0(0)) {
- gmc_v10_0_flush_vm_hub(adev, vmid, AMDGPU_MMHUB0(0), 0);
- mutex_unlock(&adev->mman.gtt_window_lock);
- return;
- }
-
- BUG_ON(vmhub != AMDGPU_GFXHUB(0));
-
- if (!adev->mman.buffer_funcs_enabled ||
- !adev->ib_pool_ready ||
- amdgpu_in_reset(adev) ||
- ring->sched.ready == false) {
- gmc_v10_0_flush_vm_hub(adev, vmid, AMDGPU_GFXHUB(0), 0);
- mutex_unlock(&adev->mman.gtt_window_lock);
- return;
- }
-
- /* The SDMA on Navi has a bug which can theoretically result in memory
- * corruption if an invalidation happens at the same time as an VA
- * translation. Avoid this by doing the invalidation from the SDMA
- * itself.
- */
- r = amdgpu_job_alloc_with_ib(ring->adev, &adev->mman.high_pr,
- AMDGPU_FENCE_OWNER_UNDEFINED,
- 16 * 4, AMDGPU_IB_POOL_IMMEDIATE,
- &job);
- if (r)
- goto error_alloc;
-
- job->vm_pd_addr = amdgpu_gmc_pd_addr(adev->gart.bo);
- job->vm_needs_flush = true;
- job->ibs->ptr[job->ibs->length_dw++] = ring->funcs->nop;
- amdgpu_ring_pad_ib(ring, &job->ibs[0]);
- fence = amdgpu_job_submit(job);
-
- mutex_unlock(&adev->mman.gtt_window_lock);
-
- dma_fence_wait(fence, false);
- dma_fence_put(fence);
-
- return;
-
-error_alloc:
- mutex_unlock(&adev->mman.gtt_window_lock);
- DRM_ERROR("Error flushing GPU TLB using the SDMA (%d)!\n", r);
+ if (i >= adev->usec_timeout)
+ DRM_ERROR("Timeout waiting for VM flush hub: %d!\n", vmhub);
}
/**
--
2.34.1
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