[Intel-gfx] [PATCH v2 1/2] drm/i915: Cleanup instdone collection
Jani Nikula
jani.nikula at linux.intel.com
Fri Sep 16 09:56:51 UTC 2016
On Tue, 06 Sep 2016, Mika Kuoppala <mika.kuoppala at linux.intel.com> wrote:
> Imre Deak <imre.deak at intel.com> writes:
>
>> From: Ben Widawsky <benjamin.widawsky at intel.com>
>>
>> Consolidate the instdone logic so we can get a bit fancier. This patch also
>> removes the duplicated print of INSTDONE[0].
>>
>> v2: (Imre)
>> - Rebased on top of hangcheck INSTDONE changes.
>> - Move all INSTDONE registers into a single struct, store it within the
>> engine error struct during error capturing.
>>
>> Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
>> Signed-off-by: Imre Deak <imre.deak at intel.com>
>
> Reviewed-by: Mika Kuoppala <mika.kuoppala at intel.com>
I didn't receive the original messages, and I can't find them on the
list either.
BR,
Jani.
>
>> ---
>> drivers/gpu/drm/i915/i915_debugfs.c | 41 +++++++++++-----
>> drivers/gpu/drm/i915/i915_drv.h | 8 ++--
>> drivers/gpu/drm/i915/i915_gpu_error.c | 84 +++++++++++++++++++++++----------
>> drivers/gpu/drm/i915/i915_irq.c | 69 ++++++++++++++++++---------
>> drivers/gpu/drm/i915/i915_reg.h | 1 -
>> drivers/gpu/drm/i915/intel_ringbuffer.h | 10 +++-
>> 6 files changed, 151 insertions(+), 62 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
>> index 3fde507..45244f9 100644
>> --- a/drivers/gpu/drm/i915/i915_debugfs.c
>> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
>> @@ -1277,15 +1277,36 @@ out:
>> return ret;
>> }
>>
>> +static void i915_instdone_info(struct drm_i915_private *dev_priv,
>> + struct seq_file *m,
>> + struct intel_instdone *instdone)
>> +{
>> + seq_printf(m, "\t\tINSTDONE: 0x%08x\n",
>> + instdone->instdone);
>> +
>> + if (INTEL_GEN(dev_priv) <= 3)
>> + return;
>> +
>> + seq_printf(m, "\t\tSC_INSTDONE: 0x%08x\n",
>> + instdone->slice_common);
>> +
>> + if (INTEL_GEN(dev_priv) <= 6)
>> + return;
>> +
>> + seq_printf(m, "\t\tSAMPLER_INSTDONE: 0x%08x\n",
>> + instdone->sampler);
>> + seq_printf(m, "\t\tROW_INSTDONE: 0x%08x\n",
>> + instdone->row);
>> +}
>> +
>> static int i915_hangcheck_info(struct seq_file *m, void *unused)
>> {
>> struct drm_i915_private *dev_priv = node_to_i915(m->private);
>> struct intel_engine_cs *engine;
>> u64 acthd[I915_NUM_ENGINES];
>> u32 seqno[I915_NUM_ENGINES];
>> - u32 instdone[I915_NUM_INSTDONE_REG];
>> + struct intel_instdone instdone;
>> enum intel_engine_id id;
>> - int j;
>>
>> if (!i915.enable_hangcheck) {
>> seq_printf(m, "Hangcheck disabled\n");
>> @@ -1299,7 +1320,7 @@ static int i915_hangcheck_info(struct seq_file *m, void *unused)
>> seqno[id] = intel_engine_get_seqno(engine);
>> }
>>
>> - i915_get_extra_instdone(dev_priv, instdone);
>> + i915_get_engine_instdone(dev_priv, RCS, &instdone);
>>
>> intel_runtime_pm_put(dev_priv);
>>
>> @@ -1327,18 +1348,14 @@ static int i915_hangcheck_info(struct seq_file *m, void *unused)
>> seq_printf(m, "\taction = %d\n", engine->hangcheck.action);
>>
>> if (engine->id == RCS) {
>> - seq_puts(m, "\tinstdone read =");
>> + seq_puts(m, "\tinstdone read =\n");
>>
>> - for (j = 0; j < I915_NUM_INSTDONE_REG; j++)
>> - seq_printf(m, " 0x%08x", instdone[j]);
>> + i915_instdone_info(dev_priv, m, &instdone);
>>
>> - seq_puts(m, "\n\tinstdone accu =");
>> + seq_puts(m, "\tinstdone accu =\n");
>>
>> - for (j = 0; j < I915_NUM_INSTDONE_REG; j++)
>> - seq_printf(m, " 0x%08x",
>> - engine->hangcheck.instdone[j]);
>> -
>> - seq_puts(m, "\n");
>> + i915_instdone_info(dev_priv, m,
>> + &engine->hangcheck.instdone);
>> }
>> }
>>
>> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
>> index 757b1d1..20bf72e 100644
>> --- a/drivers/gpu/drm/i915/i915_drv.h
>> +++ b/drivers/gpu/drm/i915/i915_drv.h
>> @@ -747,7 +747,7 @@ struct drm_i915_error_state {
>> u32 gam_ecochk;
>> u32 gab_ctl;
>> u32 gfx_mode;
>> - u32 extra_instdone[I915_NUM_INSTDONE_REG];
>> +
>> u64 fence[I915_MAX_NUM_FENCES];
>> struct intel_overlay_error_state *overlay;
>> struct intel_display_error_state *display;
>> @@ -779,7 +779,6 @@ struct drm_i915_error_state {
>> u32 hws;
>> u32 ipeir;
>> u32 ipehr;
>> - u32 instdone;
>> u32 bbstate;
>> u32 instpm;
>> u32 instps;
>> @@ -790,6 +789,7 @@ struct drm_i915_error_state {
>> u64 faddr;
>> u32 rc_psmi; /* sleep state */
>> u32 semaphore_mboxes[I915_NUM_ENGINES - 1];
>> + struct intel_instdone instdone;
>>
>> struct drm_i915_error_object {
>> int page_count;
>> @@ -3560,7 +3560,9 @@ void i915_error_state_get(struct drm_device *dev,
>> void i915_error_state_put(struct i915_error_state_file_priv *error_priv);
>> void i915_destroy_error_state(struct drm_device *dev);
>>
>> -void i915_get_extra_instdone(struct drm_i915_private *dev_priv, uint32_t *instdone);
>> +void i915_get_engine_instdone(struct drm_i915_private *dev_priv,
>> + enum intel_engine_id engine_id,
>> + struct intel_instdone *instdone);
>> const char *i915_cache_level_str(struct drm_i915_private *i915, int type);
>>
>> /* i915_cmd_parser.c */
>> diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
>> index aed55e4..80fe101 100644
>> --- a/drivers/gpu/drm/i915/i915_gpu_error.c
>> +++ b/drivers/gpu/drm/i915/i915_gpu_error.c
>> @@ -228,6 +228,27 @@ static const char *hangcheck_action_to_str(enum intel_engine_hangcheck_action a)
>> return "unknown";
>> }
>>
>> +static void error_print_instdone(struct drm_i915_error_state_buf *m,
>> + struct drm_i915_error_engine *ee)
>> +{
>> + err_printf(m, " INSTDONE: 0x%08x\n",
>> + ee->instdone.instdone);
>> +
>> + if (ee->engine_id != RCS || INTEL_GEN(m->i915) <= 3)
>> + return;
>> +
>> + err_printf(m, " SC_INSTDONE: 0x%08x\n",
>> + ee->instdone.slice_common);
>> +
>> + if (INTEL_GEN(m->i915) <= 6)
>> + return;
>> +
>> + err_printf(m, " SAMPLER_INSTDONE: 0x%08x\n",
>> + ee->instdone.sampler);
>> + err_printf(m, " ROW_INSTDONE: 0x%08x\n",
>> + ee->instdone.row);
>> +}
>> +
>> static void error_print_engine(struct drm_i915_error_state_buf *m,
>> struct drm_i915_error_engine *ee)
>> {
>> @@ -242,7 +263,9 @@ static void error_print_engine(struct drm_i915_error_state_buf *m,
>> (u32)(ee->acthd>>32), (u32)ee->acthd);
>> err_printf(m, " IPEIR: 0x%08x\n", ee->ipeir);
>> err_printf(m, " IPEHR: 0x%08x\n", ee->ipehr);
>> - err_printf(m, " INSTDONE: 0x%08x\n", ee->instdone);
>> +
>> + error_print_instdone(m, ee);
>> +
>> if (ee->batchbuffer) {
>> u64 start = ee->batchbuffer->gtt_offset;
>> u64 end = start + ee->batchbuffer->gtt_size;
>> @@ -402,10 +425,6 @@ int i915_error_state_to_str(struct drm_i915_error_state_buf *m,
>> for (i = 0; i < dev_priv->num_fence_regs; i++)
>> err_printf(m, " fence[%d] = %08llx\n", i, error->fence[i]);
>>
>> - for (i = 0; i < ARRAY_SIZE(error->extra_instdone); i++)
>> - err_printf(m, " INSTDONE_%d: 0x%08x\n", i,
>> - error->extra_instdone[i]);
>> -
>> if (INTEL_INFO(dev)->gen >= 6) {
>> err_printf(m, "ERROR: 0x%08x\n", error->error);
>>
>> @@ -851,7 +870,8 @@ static uint32_t i915_error_generate_code(struct drm_i915_private *dev_priv,
>> if (engine_id)
>> *engine_id = i;
>>
>> - return error->engine[i].ipehr ^ error->engine[i].instdone;
>> + return error->engine[i].ipehr ^
>> + error->engine[i].instdone.instdone;
>> }
>> }
>>
>> @@ -983,7 +1003,6 @@ static void error_record_engine_registers(struct drm_i915_error_state *error,
>> ee->faddr = I915_READ(RING_DMA_FADD(engine->mmio_base));
>> ee->ipeir = I915_READ(RING_IPEIR(engine->mmio_base));
>> ee->ipehr = I915_READ(RING_IPEHR(engine->mmio_base));
>> - ee->instdone = I915_READ(RING_INSTDONE(engine->mmio_base));
>> ee->instps = I915_READ(RING_INSTPS(engine->mmio_base));
>> ee->bbaddr = I915_READ(RING_BBADDR(engine->mmio_base));
>> if (INTEL_GEN(dev_priv) >= 8) {
>> @@ -995,9 +1014,10 @@ static void error_record_engine_registers(struct drm_i915_error_state *error,
>> ee->faddr = I915_READ(DMA_FADD_I8XX);
>> ee->ipeir = I915_READ(IPEIR);
>> ee->ipehr = I915_READ(IPEHR);
>> - ee->instdone = I915_READ(GEN2_INSTDONE);
>> }
>>
>> + i915_get_engine_instdone(dev_priv, engine->id, &ee->instdone);
>> +
>> ee->waiting = intel_engine_has_waiter(engine);
>> ee->instpm = I915_READ(RING_INSTPM(engine->mmio_base));
>> ee->acthd = intel_engine_get_active_head(engine);
>> @@ -1357,8 +1377,6 @@ static void i915_capture_reg_state(struct drm_i915_private *dev_priv,
>> }
>> error->eir = I915_READ(EIR);
>> error->pgtbl_er = I915_READ(PGTBL_ER);
>> -
>> - i915_get_extra_instdone(dev_priv, error->extra_instdone);
>> }
>>
>> static void i915_error_capture_msg(struct drm_i915_private *dev_priv,
>> @@ -1517,20 +1535,38 @@ const char *i915_cache_level_str(struct drm_i915_private *i915, int type)
>> }
>>
>> /* NB: please notice the memset */
>> -void i915_get_extra_instdone(struct drm_i915_private *dev_priv,
>> - uint32_t *instdone)
>> +void i915_get_engine_instdone(struct drm_i915_private *dev_priv,
>> + enum intel_engine_id engine_id,
>> + struct intel_instdone *instdone)
>> {
>> - memset(instdone, 0, sizeof(*instdone) * I915_NUM_INSTDONE_REG);
>> -
>> - if (IS_GEN2(dev_priv) || IS_GEN3(dev_priv))
>> - instdone[0] = I915_READ(GEN2_INSTDONE);
>> - else if (IS_GEN4(dev_priv) || IS_GEN5(dev_priv) || IS_GEN6(dev_priv)) {
>> - instdone[0] = I915_READ(RING_INSTDONE(RENDER_RING_BASE));
>> - instdone[1] = I915_READ(GEN4_INSTDONE1);
>> - } else if (INTEL_GEN(dev_priv) >= 7) {
>> - instdone[0] = I915_READ(RING_INSTDONE(RENDER_RING_BASE));
>> - instdone[1] = I915_READ(GEN7_SC_INSTDONE);
>> - instdone[2] = I915_READ(GEN7_SAMPLER_INSTDONE);
>> - instdone[3] = I915_READ(GEN7_ROW_INSTDONE);
>> + u32 mmio_base = dev_priv->engine[engine_id].mmio_base;
>> +
>> + memset(instdone, 0, sizeof(*instdone));
>> +
>> + switch (INTEL_GEN(dev_priv)) {
>> + default:
>> + instdone->instdone = I915_READ(RING_INSTDONE(mmio_base));
>> +
>> + if (engine_id != RCS)
>> + break;
>> +
>> + instdone->slice_common = I915_READ(GEN7_SC_INSTDONE);
>> + instdone->sampler = I915_READ(GEN7_SAMPLER_INSTDONE);
>> + instdone->row = I915_READ(GEN7_ROW_INSTDONE);
>> +
>> + break;
>> + case 6:
>> + case 5:
>> + case 4:
>> + instdone->instdone = I915_READ(RING_INSTDONE(mmio_base));
>> +
>> + if (engine_id == RCS)
>> + /* HACK: Using the wrong struct member */
>> + instdone->slice_common = I915_READ(GEN4_INSTDONE1);
>> + break;
>> + case 3:
>> + case 2:
>> + instdone->instdone = I915_READ(GEN2_INSTDONE);
>> + break;
>> }
>> }
>> diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
>> index 82358d4..82cf823 100644
>> --- a/drivers/gpu/drm/i915/i915_irq.c
>> +++ b/drivers/gpu/drm/i915/i915_irq.c
>> @@ -2550,18 +2550,36 @@ static void i915_reset_and_wakeup(struct drm_i915_private *dev_priv)
>> }
>> }
>>
>> +static inline void
>> +i915_err_print_instdone(struct drm_i915_private *dev_priv,
>> + struct intel_instdone *instdone)
>> +{
>> + pr_err(" INSTDONE: 0x%08x\n", instdone->instdone);
>> +
>> + if (INTEL_GEN(dev_priv) <= 3)
>> + return;
>> +
>> + pr_err(" SC_INSTDONE: 0x%08x\n", instdone->slice_common);
>> +
>> + if (INTEL_GEN(dev_priv) <= 6)
>> + return;
>> +
>> + pr_err(" SAMPLER_INSTDONE: 0x%08x\n", instdone->sampler);
>> + pr_err(" ROW_INSTDONE: 0x%08x\n", instdone->row);
>> +}
>> +
>> static void i915_report_and_clear_eir(struct drm_i915_private *dev_priv)
>> {
>> - uint32_t instdone[I915_NUM_INSTDONE_REG];
>> + struct intel_instdone instdone;
>> u32 eir = I915_READ(EIR);
>> - int pipe, i;
>> + int pipe;
>>
>> if (!eir)
>> return;
>>
>> pr_err("render error detected, EIR: 0x%08x\n", eir);
>>
>> - i915_get_extra_instdone(dev_priv, instdone);
>> + i915_get_engine_instdone(dev_priv, RCS, &instdone);
>>
>> if (IS_G4X(dev_priv)) {
>> if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
>> @@ -2569,8 +2587,7 @@ static void i915_report_and_clear_eir(struct drm_i915_private *dev_priv)
>>
>> pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
>> pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
>> - for (i = 0; i < ARRAY_SIZE(instdone); i++)
>> - pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
>> + i915_err_print_instdone(dev_priv, &instdone);
>> pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
>> pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
>> I915_WRITE(IPEIR_I965, ipeir);
>> @@ -2605,8 +2622,7 @@ static void i915_report_and_clear_eir(struct drm_i915_private *dev_priv)
>> if (eir & I915_ERROR_INSTRUCTION) {
>> pr_err("instruction error\n");
>> pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM));
>> - for (i = 0; i < ARRAY_SIZE(instdone); i++)
>> - pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
>> + i915_err_print_instdone(dev_priv, &instdone);
>> if (INTEL_GEN(dev_priv) < 4) {
>> u32 ipeir = I915_READ(IPEIR);
>>
>> @@ -2949,31 +2965,42 @@ static void semaphore_clear_deadlocks(struct drm_i915_private *dev_priv)
>> engine->hangcheck.deadlock = 0;
>> }
>>
>> +static bool instdone_unchanged(u32 current_instdone, u32 *old_instdone)
>> +{
>> + u32 tmp = current_instdone | *old_instdone;
>> + bool unchanged;
>> +
>> + unchanged = tmp == *old_instdone;
>> + *old_instdone |= tmp;
>> +
>> + return unchanged;
>> +}
>> +
>> static bool subunits_stuck(struct intel_engine_cs *engine)
>> {
>> - u32 instdone[I915_NUM_INSTDONE_REG];
>> + struct drm_i915_private *dev_priv = engine->i915;
>> + struct intel_instdone instdone;
>> + struct intel_instdone *accu_instdone = &engine->hangcheck.instdone;
>> bool stuck;
>> - int i;
>>
>> if (engine->id != RCS)
>> return true;
>>
>> - i915_get_extra_instdone(engine->i915, instdone);
>> + i915_get_engine_instdone(dev_priv, RCS, &instdone);
>>
>> /* There might be unstable subunit states even when
>> * actual head is not moving. Filter out the unstable ones by
>> * accumulating the undone -> done transitions and only
>> * consider those as progress.
>> */
>> - stuck = true;
>> - for (i = 0; i < I915_NUM_INSTDONE_REG; i++) {
>> - const u32 tmp = instdone[i] | engine->hangcheck.instdone[i];
>> -
>> - if (tmp != engine->hangcheck.instdone[i])
>> - stuck = false;
>> -
>> - engine->hangcheck.instdone[i] |= tmp;
>> - }
>> + stuck = instdone_unchanged(instdone.instdone,
>> + &accu_instdone->instdone);
>> + stuck &= instdone_unchanged(instdone.slice_common,
>> + &accu_instdone->slice_common);
>> + stuck &= instdone_unchanged(instdone.sampler,
>> + &accu_instdone->sampler);
>> + stuck &= instdone_unchanged(instdone.row,
>> + &accu_instdone->row);
>>
>> return stuck;
>> }
>> @@ -2984,7 +3011,7 @@ head_stuck(struct intel_engine_cs *engine, u64 acthd)
>> if (acthd != engine->hangcheck.acthd) {
>>
>> /* Clear subunit states on head movement */
>> - memset(engine->hangcheck.instdone, 0,
>> + memset(&engine->hangcheck.instdone, 0,
>> sizeof(engine->hangcheck.instdone));
>>
>> return HANGCHECK_ACTIVE;
>> @@ -3158,7 +3185,7 @@ static void i915_hangcheck_elapsed(struct work_struct *work)
>> /* Clear head and subunit states on seqno movement */
>> acthd = 0;
>>
>> - memset(engine->hangcheck.instdone, 0,
>> + memset(&engine->hangcheck.instdone, 0,
>> sizeof(engine->hangcheck.instdone));
>> }
>>
>> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
>> index a29d707..e84bc2e 100644
>> --- a/drivers/gpu/drm/i915/i915_reg.h
>> +++ b/drivers/gpu/drm/i915/i915_reg.h
>> @@ -1708,7 +1708,6 @@ enum skl_disp_power_wells {
>> #define GEN7_SC_INSTDONE _MMIO(0x7100)
>> #define GEN7_SAMPLER_INSTDONE _MMIO(0xe160)
>> #define GEN7_ROW_INSTDONE _MMIO(0xe164)
>> -#define I915_NUM_INSTDONE_REG 4
>> #define RING_IPEIR(base) _MMIO((base)+0x64)
>> #define RING_IPEHR(base) _MMIO((base)+0x68)
>> /*
>> diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
>> index 84aea54..afc3f1e 100644
>> --- a/drivers/gpu/drm/i915/intel_ringbuffer.h
>> +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
>> @@ -73,13 +73,21 @@ enum intel_engine_hangcheck_action {
>>
>> #define HANGCHECK_SCORE_RING_HUNG 31
>>
>> +struct intel_instdone {
>> + u32 instdone;
>> + /* The following exist only in the RCS engine */
>> + u32 slice_common;
>> + u32 sampler;
>> + u32 row;
>> +};
>> +
>> struct intel_engine_hangcheck {
>> u64 acthd;
>> u32 seqno;
>> int score;
>> enum intel_engine_hangcheck_action action;
>> int deadlock;
>> - u32 instdone[I915_NUM_INSTDONE_REG];
>> + struct intel_instdone instdone;
>> };
>>
>> struct intel_ring {
>> --
>> 2.5.0
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--
Jani Nikula, Intel Open Source Technology Center
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