From 9bdc2092b488bc81aa5409b4d6fc931c5bea1094 Mon Sep 17 00:00:00 2001 From: Andrey Grodzovsky Date: Tue, 19 Jun 2018 10:27:53 -0400 Subject: [PATCH] drm/amdgpu: Add parsing SQ_EDC_INFO to SQ IH v3. MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Access to SQ_EDC_INFO requires selecting register instance and hence mutex lock when accessing GRBM_GFX_INDEX for which a work is schedueled from IH. But SQ interrupt can be raised on many instances at once which means queuing work will usually succeed for the first one but fail for the rest since the work takes time to process. To avoid losing info about other interrupt instances call the parsing function directly from high IRQ when current work hasn't finished and avoid accessing SQ_EDC_INFO in that case. v2: Simplify high IRQ and BH handlers synchronization using work_pending. Remove {READ,WRITE}_ONCE notations since smp_{r,w}mb are implicit compiler barriers. v3: Remove exlicit memory barriers as scedule_work has r/w barriers. Signed-off-by: Andrey Grodzovsky Acked-by: Christian König Acked-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 7 +++ drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 82 +++++++++++++++++++++++++++++------ 2 files changed, 76 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index 71b9b86..fb17838 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -930,6 +930,11 @@ struct amdgpu_ngg { bool init; }; +struct sq_work { + struct work_struct work; + unsigned ih_data; +}; + struct amdgpu_gfx { struct mutex gpu_clock_mutex; struct amdgpu_gfx_config config; @@ -970,6 +975,8 @@ struct amdgpu_gfx { struct amdgpu_irq_src priv_inst_irq; struct amdgpu_irq_src cp_ecc_error_irq; struct amdgpu_irq_src sq_irq; + struct sq_work sq_work; + /* gfx status */ uint32_t gfx_current_status; /* ce ram size*/ diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c index 1d99a42..4201f3d 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c @@ -704,6 +704,17 @@ static const u32 stoney_mgcg_cgcg_init[] = mmCGTS_SM_CTRL_REG, 0xffffffff, 0x96940200, }; + +static const char * const sq_edc_source_names[] = { + "SQ_EDC_INFO_SOURCE_INVALID: No EDC error has occurred", + "SQ_EDC_INFO_SOURCE_INST: EDC source is Instruction Fetch", + "SQ_EDC_INFO_SOURCE_SGPR: EDC source is SGPR or SQC data return", + "SQ_EDC_INFO_SOURCE_VGPR: EDC source is VGPR", + "SQ_EDC_INFO_SOURCE_LDS: EDC source is LDS", + "SQ_EDC_INFO_SOURCE_GDS: EDC source is GDS", + "SQ_EDC_INFO_SOURCE_TA: EDC source is TA", +}; + static void gfx_v8_0_set_ring_funcs(struct amdgpu_device *adev); static void gfx_v8_0_set_irq_funcs(struct amdgpu_device *adev); static void gfx_v8_0_set_gds_init(struct amdgpu_device *adev); @@ -2006,6 +2017,8 @@ static int gfx_v8_0_compute_ring_init(struct amdgpu_device *adev, int ring_id, return 0; } +static void gfx_v8_0_sq_irq_work_func(struct work_struct *work); + static int gfx_v8_0_sw_init(void *handle) { int i, j, k, r, ring_id; @@ -2069,6 +2082,8 @@ static int gfx_v8_0_sw_init(void *handle) return r; } + INIT_WORK(&adev->gfx.sq_work.work, gfx_v8_0_sq_irq_work_func); + adev->gfx.gfx_current_status = AMDGPU_GFX_NORMAL_MODE; gfx_v8_0_scratch_init(adev); @@ -6955,14 +6970,11 @@ static int gfx_v8_0_cp_ecc_error_irq(struct amdgpu_device *adev, return 0; } -static int gfx_v8_0_sq_irq(struct amdgpu_device *adev, - struct amdgpu_irq_src *source, - struct amdgpu_iv_entry *entry) +static void gfx_v8_0_parse_sq_irq(struct amdgpu_device *adev, unsigned ih_data) { - u8 enc, se_id; + u32 enc, se_id, sh_id, cu_id; char type[20]; - unsigned ih_data = entry->src_data[0]; - + int sq_edc_source = -1; enc = REG_GET_FIELD(ih_data, SQ_INTERRUPT_WORD_CMN, ENCODING); se_id = REG_GET_FIELD(ih_data, SQ_INTERRUPT_WORD_CMN, SE_ID); @@ -6988,6 +7000,24 @@ static int gfx_v8_0_sq_irq(struct amdgpu_device *adev, case 1: case 2: + cu_id = REG_GET_FIELD(ih_data, SQ_INTERRUPT_WORD_WAVE, CU_ID); + sh_id = REG_GET_FIELD(ih_data, SQ_INTERRUPT_WORD_WAVE, SH_ID); + + /* + * This function can be called either directly from ISR + * or from BH in which case we can access SQ_EDC_INFO + * instance + */ + if (in_task()) { + mutex_lock(&adev->grbm_idx_mutex); + gfx_v8_0_select_se_sh(adev, se_id, sh_id, cu_id); + + sq_edc_source = REG_GET_FIELD(RREG32(mmSQ_EDC_INFO), SQ_EDC_INFO, SOURCE); + + gfx_v8_0_select_se_sh(adev, 0xffffffff, 0xffffffff, 0xffffffff); + mutex_unlock(&adev->grbm_idx_mutex); + } + if (enc == 1) sprintf(type, "instruction intr"); else @@ -6995,20 +7025,46 @@ static int gfx_v8_0_sq_irq(struct amdgpu_device *adev, DRM_INFO( "SQ %s detected: " - "se_id %d, cu_id %d, simd_id %d, wave_id %d, vm_id %d\n" - "trap %s, sh_id %d. ", - type, se_id, - REG_GET_FIELD(ih_data, SQ_INTERRUPT_WORD_WAVE, CU_ID), + "se_id %d, sh_id %d, cu_id %d, simd_id %d, wave_id %d, vm_id %d " + "trap %s, sq_ed_info.source %s.\n", + type, se_id, sh_id, cu_id, REG_GET_FIELD(ih_data, SQ_INTERRUPT_WORD_WAVE, SIMD_ID), REG_GET_FIELD(ih_data, SQ_INTERRUPT_WORD_WAVE, WAVE_ID), REG_GET_FIELD(ih_data, SQ_INTERRUPT_WORD_WAVE, VM_ID), REG_GET_FIELD(ih_data, SQ_INTERRUPT_WORD_WAVE, PRIV) ? "true" : "false", - REG_GET_FIELD(ih_data, SQ_INTERRUPT_WORD_WAVE, SH_ID) - ); + (sq_edc_source != -1) ? sq_edc_source_names[sq_edc_source] : "unavailable" + ); break; default: DRM_ERROR("SQ invalid encoding type\n."); - return -EINVAL; + } +} + +static void gfx_v8_0_sq_irq_work_func(struct work_struct *work) +{ + + struct amdgpu_device *adev = container_of(work, struct amdgpu_device, gfx.sq_work.work); + struct sq_work *sq_work = container_of(work, struct sq_work, work); + + gfx_v8_0_parse_sq_irq(adev, sq_work->ih_data); +} + +static int gfx_v8_0_sq_irq(struct amdgpu_device *adev, + struct amdgpu_irq_src *source, + struct amdgpu_iv_entry *entry) +{ + unsigned ih_data = entry->src_data[0]; + + /* + * Try to submit work so SQ_EDC_INFO can be accessed from + * BH. If previous work submission hasn't finished yet + * just print whatever info is possible directly from the ISR. + */ + if (work_pending(&adev->gfx.sq_work.work)) { + gfx_v8_0_parse_sq_irq(adev, ih_data); + } else { + adev->gfx.sq_work.ih_data = ih_data; + schedule_work(&adev->gfx.sq_work.work); } return 0; -- 2.7.4