i965: perf: snapshot RPSTAT register
This register contains the current/previous frequency of the GT, it's one of the value GPA would like to have as part of their queries. v2: Don't use this register on baytrail/cherryview (Ken) Use GET_FIELD() macro (Ken) Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
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@ -1656,6 +1656,18 @@ enum brw_pixel_shader_coverage_mask_mode {
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#define CS_DEBUG_MODE2 0x20d8 /* Gen9+ */
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# define CSDBG2_CONSTANT_BUFFER_ADDRESS_OFFSET_DISABLE (1 << 4)
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#define GEN7_RPSTAT1 0xA01C
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#define GEN7_RPSTAT1_CURR_GT_FREQ_SHIFT 7
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#define GEN7_RPSTAT1_CURR_GT_FREQ_MASK INTEL_MASK(13, 7)
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#define GEN7_RPSTAT1_PREV_GT_FREQ_SHIFT 0
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#define GEN7_RPSTAT1_PREV_GT_FREQ_MASK INTEL_MASK(6, 0)
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#define GEN9_RPSTAT0 0xA01C
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#define GEN9_RPSTAT0_CURR_GT_FREQ_SHIFT 23
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#define GEN9_RPSTAT0_CURR_GT_FREQ_MASK INTEL_MASK(31, 23)
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#define GEN9_RPSTAT0_PREV_GT_FREQ_SHIFT 0
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#define GEN9_RPSTAT0_PREV_GT_FREQ_MASK INTEL_MASK(8, 0)
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#define SLICE_COMMON_ECO_CHICKEN1 0x731c /* Gen9+ */
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# define GLK_SCEC_BARRIER_MODE_GPGPU (0 << 7)
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# define GLK_SCEC_BARRIER_MODE_3D_HULL (1 << 7)
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@ -216,6 +216,8 @@ brw_perf_query(struct gl_perf_query_object *o)
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#define MI_RPC_BO_SIZE 4096
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#define MI_RPC_BO_END_OFFSET_BYTES (MI_RPC_BO_SIZE / 2)
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#define MI_FREQ_START_OFFSET_BYTES (3072)
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#define MI_FREQ_END_OFFSET_BYTES (3076)
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/******************************************************************************/
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@ -946,6 +948,21 @@ close_perf(struct brw_context *brw)
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}
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}
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static void
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capture_frequency_stat_register(struct brw_context *brw,
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struct brw_bo *bo,
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uint32_t bo_offset)
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{
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const struct gen_device_info *devinfo = &brw->screen->devinfo;
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if (devinfo->gen >= 7 && devinfo->gen <= 8 &&
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!devinfo->is_baytrail && !devinfo->is_cherryview) {
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brw_store_register_mem32(brw, bo, GEN7_RPSTAT1, bo_offset);
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} else if (devinfo->gen >= 9) {
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brw_store_register_mem32(brw, bo, GEN9_RPSTAT0, bo_offset);
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}
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}
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/**
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* Driver hook for glBeginPerfQueryINTEL().
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*/
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@ -1138,6 +1155,8 @@ brw_begin_perf_query(struct gl_context *ctx,
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/* Take a starting OA counter snapshot. */
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brw->vtbl.emit_mi_report_perf_count(brw, obj->oa.bo, 0,
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obj->oa.begin_report_id);
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capture_frequency_stat_register(brw, obj->oa.bo, MI_FREQ_START_OFFSET_BYTES);
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++brw->perfquery.n_active_oa_queries;
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/* No already-buffered samples can possibly be associated with this query
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@ -1221,6 +1240,7 @@ brw_end_perf_query(struct gl_context *ctx,
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*/
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if (!obj->oa.results_accumulated) {
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/* Take an ending OA counter snapshot. */
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capture_frequency_stat_register(brw, obj->oa.bo, MI_FREQ_END_OFFSET_BYTES);
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brw->vtbl.emit_mi_report_perf_count(brw, obj->oa.bo,
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MI_RPC_BO_END_OFFSET_BYTES,
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obj->oa.begin_report_id + 1);
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@ -1321,6 +1341,35 @@ brw_is_perf_query_ready(struct gl_context *ctx,
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return false;
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}
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static void
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read_gt_frequency(struct brw_context *brw,
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struct brw_perf_query_object *obj)
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{
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const struct gen_device_info *devinfo = &brw->screen->devinfo;
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uint32_t start = *((uint32_t *)(obj->oa.map + MI_FREQ_START_OFFSET_BYTES)),
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end = *((uint32_t *)(obj->oa.map + MI_FREQ_END_OFFSET_BYTES));
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switch (devinfo->gen) {
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case 7:
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case 8:
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obj->oa.gt_frequency[0] = GET_FIELD(start, GEN7_RPSTAT1_CURR_GT_FREQ) * 50ULL;
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obj->oa.gt_frequency[1] = GET_FIELD(end, GEN7_RPSTAT1_CURR_GT_FREQ) * 50ULL;
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break;
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case 9:
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case 10:
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case 11:
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obj->oa.gt_frequency[0] = GET_FIELD(start, GEN9_RPSTAT0_CURR_GT_FREQ) * 50ULL / 3ULL;
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obj->oa.gt_frequency[1] = GET_FIELD(end, GEN9_RPSTAT0_CURR_GT_FREQ) * 50ULL / 3ULL;
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break;
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default:
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unreachable("unexpected gen");
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}
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/* Put the numbers into Hz. */
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obj->oa.gt_frequency[0] *= 1000000ULL;
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obj->oa.gt_frequency[1] *= 1000000ULL;
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}
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static int
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get_oa_counter_data(struct brw_context *brw,
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struct brw_perf_query_object *obj,
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@ -1332,6 +1381,7 @@ get_oa_counter_data(struct brw_context *brw,
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int written = 0;
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if (!obj->oa.results_accumulated) {
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read_gt_frequency(brw, obj);
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accumulate_oa_reports(brw, obj);
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assert(obj->oa.results_accumulated);
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@ -113,6 +113,11 @@ struct brw_perf_query_object
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* Number of reports accumulated to produce the results.
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*/
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uint32_t reports_accumulated;
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/**
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* Frequency of the GT at begin and end of the query.
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*/
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uint64_t gt_frequency[2];
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} oa;
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struct {
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