From: Don Hiatt <don.hiatt@xxxxxxxxx> On GEN12+ use GEN12_RPSTAT register to get actual resolved GT freq. GEN12_RPSTAT does not require a forcewake and will return 0 freq if GT is in RC6. v2: - Fixed review comments(Ashutosh) - Added function intel_rps_read_rpstat_fw to read RPSTAT without forcewake, required especially for GEN6_RPSTAT1 (Ashutosh, Tvrtko) v3: - Updated commit title and message for more clarity (Ashutosh) - Replaced intel_rps_read_rpstat with direct read to GEN12_RPSTAT1 in read_cagf (Ashutosh) v4: Remove GEN12_CAGF_SHIFT and use REG_FIELD_GET (Rodrigo) Cc: Don Hiatt <donhiatt@xxxxxxxxx> Cc: Andi Shyti <andi.shyti@xxxxxxxxx> Signed-off-by: Don Hiatt <don.hiatt@xxxxxxxxx> Signed-off-by: Badal Nilawar <badal.nilawar@xxxxxxxxx> Signed-off-by: Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx> Reviewed-by: Andi Shyti <andi.shyti@xxxxxxxxxxxxxxx> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> --- drivers/gpu/drm/i915/gt/intel_gt_regs.h | 1 + drivers/gpu/drm/i915/gt/intel_rps.c | 32 +++++++++++++++++++++---- drivers/gpu/drm/i915/gt/intel_rps.h | 2 ++ drivers/gpu/drm/i915/i915_pmu.c | 3 +-- 4 files changed, 32 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h index 35c039573294c..f8c4f758ac0b1 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h +++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h @@ -1539,6 +1539,7 @@ #define GEN12_RPSTAT1 _MMIO(0x1381b4) #define GEN12_VOLTAGE_MASK REG_GENMASK(10, 0) +#define GEN12_CAGF_MASK REG_GENMASK(19, 11) #define GEN11_GT_INTR_DW(x) _MMIO(0x190018 + ((x) * 4)) #define GEN11_CSME (31) diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c index 5061b5b3cece7..02f69cbae5162 100644 --- a/drivers/gpu/drm/i915/gt/intel_rps.c +++ b/drivers/gpu/drm/i915/gt/intel_rps.c @@ -2066,12 +2066,34 @@ void intel_rps_sanitize(struct intel_rps *rps) rps_disable_interrupts(rps); } +u32 intel_rps_read_rpstat_fw(struct intel_rps *rps) +{ + struct drm_i915_private *i915 = rps_to_i915(rps); + i915_reg_t rpstat; + + rpstat = (GRAPHICS_VER(i915) >= 12) ? GEN12_RPSTAT1 : GEN6_RPSTAT1; + + return intel_uncore_read_fw(rps_to_gt(rps)->uncore, rpstat); +} + +u32 intel_rps_read_rpstat(struct intel_rps *rps) +{ + struct drm_i915_private *i915 = rps_to_i915(rps); + i915_reg_t rpstat; + + rpstat = (GRAPHICS_VER(i915) >= 12) ? GEN12_RPSTAT1 : GEN6_RPSTAT1; + + return intel_uncore_read(rps_to_gt(rps)->uncore, rpstat); +} + u32 intel_rps_get_cagf(struct intel_rps *rps, u32 rpstat) { struct drm_i915_private *i915 = rps_to_i915(rps); u32 cagf; - if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) + if (GRAPHICS_VER(i915) >= 12) + cagf = REG_FIELD_GET(GEN12_CAGF_MASK, rpstat); + else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) cagf = REG_FIELD_GET(RPE_MASK, rpstat); else if (GRAPHICS_VER(i915) >= 9) cagf = REG_FIELD_GET(GEN9_CAGF_MASK, rpstat); @@ -2091,7 +2113,9 @@ static u32 read_cagf(struct intel_rps *rps) struct intel_uncore *uncore = rps_to_uncore(rps); u32 freq; - if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) { + if (GRAPHICS_VER(i915) >= 12) { + freq = intel_uncore_read(uncore, GEN12_RPSTAT1); + } else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) { vlv_punit_get(i915); freq = vlv_punit_read(i915, PUNIT_REG_GPU_FREQ_STS); vlv_punit_put(i915); @@ -2257,7 +2281,7 @@ static void rps_frequency_dump(struct intel_rps *rps, struct drm_printer *p) rpinclimit = intel_uncore_read(uncore, GEN6_RP_UP_THRESHOLD); rpdeclimit = intel_uncore_read(uncore, GEN6_RP_DOWN_THRESHOLD); - rpstat = intel_uncore_read(uncore, GEN6_RPSTAT1); + rpstat = intel_rps_read_rpstat(rps); rpcurupei = intel_uncore_read(uncore, GEN6_RP_CUR_UP_EI) & GEN6_CURICONT_MASK; rpcurup = intel_uncore_read(uncore, GEN6_RP_CUR_UP) & GEN6_CURBSYTAVG_MASK; rpprevup = intel_uncore_read(uncore, GEN6_RP_PREV_UP) & GEN6_CURBSYTAVG_MASK; @@ -2392,7 +2416,7 @@ static void slpc_frequency_dump(struct intel_rps *rps, struct drm_printer *p) drm_printf(p, "PM MASK=0x%08x\n", pm_mask); drm_printf(p, "pm_intrmsk_mbz: 0x%08x\n", rps->pm_intrmsk_mbz); - drm_printf(p, "RPSTAT1: 0x%08x\n", intel_uncore_read(uncore, GEN6_RPSTAT1)); + drm_printf(p, "RPSTAT1: 0x%08x\n", intel_rps_read_rpstat(rps)); drm_printf(p, "RPNSWREQ: %dMHz\n", intel_rps_get_requested_frequency(rps)); drm_printf(p, "Lowest (RPN) frequency: %dMHz\n", intel_gpu_freq(rps, caps.min_freq)); diff --git a/drivers/gpu/drm/i915/gt/intel_rps.h b/drivers/gpu/drm/i915/gt/intel_rps.h index 110300dfd4383..9e1cad9ba0e9c 100644 --- a/drivers/gpu/drm/i915/gt/intel_rps.h +++ b/drivers/gpu/drm/i915/gt/intel_rps.h @@ -48,6 +48,8 @@ u32 intel_rps_get_rp1_frequency(struct intel_rps *rps); u32 intel_rps_get_rpn_frequency(struct intel_rps *rps); u32 intel_rps_read_punit_req(struct intel_rps *rps); u32 intel_rps_read_punit_req_frequency(struct intel_rps *rps); +u32 intel_rps_read_rpstat(struct intel_rps *rps); +u32 intel_rps_read_rpstat_fw(struct intel_rps *rps); void gen6_rps_get_freq_caps(struct intel_rps *rps, struct intel_rps_freq_caps *caps); void intel_rps_raise_unslice(struct intel_rps *rps); void intel_rps_lower_unslice(struct intel_rps *rps); diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c index 958b37123bf12..67140a87182f8 100644 --- a/drivers/gpu/drm/i915/i915_pmu.c +++ b/drivers/gpu/drm/i915/i915_pmu.c @@ -371,7 +371,6 @@ static void frequency_sample(struct intel_gt *gt, unsigned int period_ns) { struct drm_i915_private *i915 = gt->i915; - struct intel_uncore *uncore = gt->uncore; struct i915_pmu *pmu = &i915->pmu; struct intel_rps *rps = >->rps; @@ -394,7 +393,7 @@ frequency_sample(struct intel_gt *gt, unsigned int period_ns) * case we assume the system is running at the intended * frequency. Fortunately, the read should rarely fail! */ - val = intel_uncore_read_fw(uncore, GEN6_RPSTAT1); + val = intel_rps_read_rpstat_fw(rps); if (val) val = intel_rps_get_cagf(rps, val); else -- 2.38.0