[PATCH 2/2] drm/i915/gt: Consolidate the CS timestamp clocks
Chris Wilson
chris at chris-wilson.co.uk
Tue Aug 11 15:48:01 UTC 2020
Pull the GT clock information [used to derive CS timestamps and PM
interval] under the GT so that is it local to the users. In doing so, we
consolidate the two references for the same information, of which the
runtime-info took note of a potential clock source override and scaling
factors.
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/gt/intel_context.h | 6 +-
.../gpu/drm/i915/gt/intel_gt_clock_utils.c | 173 +++++++++++++++---
drivers/gpu/drm/i915/gt/intel_gt_types.h | 1 +
drivers/gpu/drm/i915/gt/selftest_engine_pm.c | 4 +-
drivers/gpu/drm/i915/gt/selftest_gt_pm.c | 8 +-
drivers/gpu/drm/i915/i915_debugfs.c | 7 +-
drivers/gpu/drm/i915/i915_drv.h | 12 --
drivers/gpu/drm/i915/i915_getparam.c | 2 +-
drivers/gpu/drm/i915/i915_gpu_error.c | 2 +-
drivers/gpu/drm/i915/i915_perf.c | 11 +-
drivers/gpu/drm/i915/intel_device_info.c | 157 ----------------
drivers/gpu/drm/i915/intel_device_info.h | 3 -
drivers/gpu/drm/i915/selftests/i915_perf.c | 2 +-
drivers/gpu/drm/i915/selftests/i915_request.c | 3 +-
14 files changed, 171 insertions(+), 220 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_context.h b/drivers/gpu/drm/i915/gt/intel_context.h
index 07be021882cc..043bf5e685f0 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.h
+++ b/drivers/gpu/drm/i915/gt/intel_context.h
@@ -235,16 +235,14 @@ intel_context_clear_nopreempt(struct intel_context *ce)
static inline u64 intel_context_get_total_runtime_ns(struct intel_context *ce)
{
- const u32 period =
- RUNTIME_INFO(ce->engine->i915)->cs_timestamp_period_ns;
+ const u32 period = ce->engine->gt->clock_period_ns;
return READ_ONCE(ce->runtime.total) * period;
}
static inline u64 intel_context_get_avg_runtime_ns(struct intel_context *ce)
{
- const u32 period =
- RUNTIME_INFO(ce->engine->i915)->cs_timestamp_period_ns;
+ const u32 period = ce->engine->gt->clock_period_ns;
return mul_u32_u32(ewma_runtime_read(&ce->runtime.avg), period);
}
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_clock_utils.c b/drivers/gpu/drm/i915/gt/intel_gt_clock_utils.c
index 6c9460c16027..de46498c5e46 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_clock_utils.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_clock_utils.c
@@ -7,34 +7,149 @@
#include "intel_gt.h"
#include "intel_gt_clock_utils.h"
-#define MHZ_12 12000000 /* 12MHz (24MHz/2), 83.333ns */
-#define MHZ_12_5 12500000 /* 12.5MHz (25MHz/2), 80ns */
-#define MHZ_19_2 19200000 /* 19.2MHz, 52.083ns */
+static u32 read_reference_ts_freq(struct intel_uncore *uncore)
+{
+ u32 ts_override = intel_uncore_read(uncore, GEN9_TIMESTAMP_OVERRIDE);
+ u32 base_freq, frac_freq;
+
+ base_freq = ((ts_override & GEN9_TIMESTAMP_OVERRIDE_US_COUNTER_DIVIDER_MASK) >>
+ GEN9_TIMESTAMP_OVERRIDE_US_COUNTER_DIVIDER_SHIFT) + 1;
+ base_freq *= 1000000;
+
+ frac_freq = ((ts_override &
+ GEN9_TIMESTAMP_OVERRIDE_US_COUNTER_DENOMINATOR_MASK) >>
+ GEN9_TIMESTAMP_OVERRIDE_US_COUNTER_DENOMINATOR_SHIFT);
+ frac_freq = 1000000 / (frac_freq + 1);
+
+ return base_freq + frac_freq;
+}
+
+static u32 gen10_get_crystal_clock_freq(struct intel_uncore *uncore,
+ u32 rpm_config_reg)
+{
+ u32 f19_2_mhz = 19200000;
+ u32 f24_mhz = 24000000;
+ u32 crystal_clock =
+ (rpm_config_reg & GEN9_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_MASK) >>
+ GEN9_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_SHIFT;
+
+ switch (crystal_clock) {
+ case GEN9_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_19_2_MHZ:
+ return f19_2_mhz;
+ case GEN9_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_24_MHZ:
+ return f24_mhz;
+ default:
+ MISSING_CASE(crystal_clock);
+ return 0;
+ }
+}
+
+static u32 gen11_get_crystal_clock_freq(struct intel_uncore *uncore,
+ u32 rpm_config_reg)
+{
+ u32 f19_2_mhz = 19200000;
+ u32 f24_mhz = 24000000;
+ u32 f25_mhz = 25000000;
+ u32 f38_4_mhz = 38400000;
+ u32 crystal_clock =
+ (rpm_config_reg & GEN11_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_MASK) >>
+ GEN11_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_SHIFT;
+
+ switch (crystal_clock) {
+ case GEN11_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_24_MHZ:
+ return f24_mhz;
+ case GEN11_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_19_2_MHZ:
+ return f19_2_mhz;
+ case GEN11_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_38_4_MHZ:
+ return f38_4_mhz;
+ case GEN11_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_25_MHZ:
+ return f25_mhz;
+ default:
+ MISSING_CASE(crystal_clock);
+ return 0;
+ }
+}
-static u32 read_clock_frequency(const struct intel_gt *gt)
+static u32 read_clock_frequency(struct intel_uncore *uncore)
{
- if (INTEL_GEN(gt->i915) >= 11) {
- u32 config;
-
- config = intel_uncore_read(gt->uncore, RPM_CONFIG0);
- config &= GEN11_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_MASK;
- config >>= GEN11_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_SHIFT;
-
- switch (config) {
- case 0: return MHZ_12;
- case 1:
- case 2: return MHZ_19_2;
- default:
- case 3: return MHZ_12_5;
+ u32 f12_5_mhz = 12500000;
+ u32 f19_2_mhz = 19200000;
+ u32 f24_mhz = 24000000;
+
+ if (INTEL_GEN(uncore->i915) <= 4) {
+ /*
+ * PRMs say:
+ *
+ * "The value in this register increments once every 16
+ * hclks." (through the “Clocking Configuration”
+ * (“CLKCFG”) MCHBAR register)
+ */
+ return RUNTIME_INFO(uncore->i915)->rawclk_freq * 1000 / 16;
+ } else if (INTEL_GEN(uncore->i915) <= 8) {
+ /*
+ * PRMs say:
+ *
+ * "The PCU TSC counts 10ns increments; this timestamp
+ * reflects bits 38:3 of the TSC (i.e. 80ns granularity,
+ * rolling over every 1.5 hours).
+ */
+ return f12_5_mhz;
+ } else if (INTEL_GEN(uncore->i915) <= 9) {
+ u32 ctc_reg = intel_uncore_read(uncore, CTC_MODE);
+ u32 freq = 0;
+
+ if ((ctc_reg & CTC_SOURCE_PARAMETER_MASK) == CTC_SOURCE_DIVIDE_LOGIC) {
+ freq = read_reference_ts_freq(uncore);
+ } else {
+ freq = IS_GEN9_LP(uncore->i915) ? f19_2_mhz : f24_mhz;
+
+ /*
+ * Now figure out how the command stream's timestamp
+ * register increments from this frequency (it might
+ * increment only every few clock cycle).
+ */
+ freq >>= 3 - ((ctc_reg & CTC_SHIFT_PARAMETER_MASK) >>
+ CTC_SHIFT_PARAMETER_SHIFT);
}
- } else if (INTEL_GEN(gt->i915) >= 9) {
- if (IS_GEN9_LP(gt->i915))
- return MHZ_19_2;
- else
- return MHZ_12;
- } else {
- return MHZ_12_5;
+
+ return freq;
+ } else if (INTEL_GEN(uncore->i915) <= 12) {
+ u32 ctc_reg = intel_uncore_read(uncore, CTC_MODE);
+ u32 freq = 0;
+
+ /*
+ * First figure out the reference frequency. There are 2 ways
+ * we can compute the frequency, either through the
+ * TIMESTAMP_OVERRIDE register or through RPM_CONFIG. CTC_MODE
+ * tells us which one we should use.
+ */
+ if ((ctc_reg & CTC_SOURCE_PARAMETER_MASK) == CTC_SOURCE_DIVIDE_LOGIC) {
+ freq = read_reference_ts_freq(uncore);
+ } else {
+ u32 rpm_config_reg = intel_uncore_read(uncore, RPM_CONFIG0);
+
+ if (INTEL_GEN(uncore->i915) <= 10)
+ freq = gen10_get_crystal_clock_freq(uncore,
+ rpm_config_reg);
+ else
+ freq = gen11_get_crystal_clock_freq(uncore,
+ rpm_config_reg);
+
+ /*
+ * Now figure out how the command stream's timestamp
+ * register increments from this frequency (it might
+ * increment only every few clock cycle).
+ */
+ freq >>= 3 - ((rpm_config_reg &
+ GEN10_RPM_CONFIG0_CTC_SHIFT_PARAMETER_MASK) >>
+ GEN10_RPM_CONFIG0_CTC_SHIFT_PARAMETER_SHIFT);
+ }
+
+ return freq;
}
+
+ MISSING_CASE("Unknown gen, unable to read command streamer timestamp frequency\n");
+ return 0;
}
void intel_gt_init_clock_frequency(struct intel_gt *gt)
@@ -43,10 +158,14 @@ void intel_gt_init_clock_frequency(struct intel_gt *gt)
* Note that on gen11+, the clock frequency may be reconfigured.
* We do not, and we assume nobody else does.
*/
- gt->clock_frequency = read_clock_frequency(gt);
+ gt->clock_frequency = read_clock_frequency(gt->uncore);
+ if (gt->clock_frequency)
+ gt->clock_period_ns = intel_gt_clock_interval_to_ns(gt, 1);
+
GT_TRACE(gt,
- "Using clock frequency: %dkHz\n",
- gt->clock_frequency / 1000);
+ "Using clock frequency: %dkHz, periond: %dns\n",
+ gt->clock_frequency / 1000,
+ gt->clock_period_ns);
}
#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_types.h b/drivers/gpu/drm/i915/gt/intel_gt_types.h
index 6d39a4a11bf3..d6db26099978 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_types.h
@@ -75,6 +75,7 @@ struct intel_gt {
intel_wakeref_t awake;
u32 clock_frequency;
+ u32 clock_period_ns;
struct intel_llc llc;
struct intel_rc6 rc6;
diff --git a/drivers/gpu/drm/i915/gt/selftest_engine_pm.c b/drivers/gpu/drm/i915/gt/selftest_engine_pm.c
index 6a49b30f6881..476f31930fec 100644
--- a/drivers/gpu/drm/i915/gt/selftest_engine_pm.c
+++ b/drivers/gpu/drm/i915/gt/selftest_engine_pm.c
@@ -135,11 +135,11 @@ static int __live_engine_timestamps(struct intel_engine_cs *engine)
d_ctx = sema[3] - sema[1];
d_ring = sema[4] - sema[0];
- d_ctx *= RUNTIME_INFO(engine->i915)->cs_timestamp_frequency_hz;
+ d_ctx *= engine->gt->clock_frequency;
if (IS_ICELAKE(engine->i915))
d_ring *= 12500000; /* Fixed 80ns for icl ctx timestamp? */
else
- d_ring *= RUNTIME_INFO(engine->i915)->cs_timestamp_frequency_hz;
+ d_ring *= engine->gt->clock_frequency;
if (4 * d_ctx > 5 * d_ring || 5 * d_ctx < 4 * d_ring) {
pr_err("%s Mismatch between ring and context timestamps!\n",
diff --git a/drivers/gpu/drm/i915/gt/selftest_gt_pm.c b/drivers/gpu/drm/i915/gt/selftest_gt_pm.c
index 6180a47c1b51..5d911f724ebe 100644
--- a/drivers/gpu/drm/i915/gt/selftest_gt_pm.c
+++ b/drivers/gpu/drm/i915/gt/selftest_gt_pm.c
@@ -71,7 +71,7 @@ static int live_gt_clocks(void *arg)
enum intel_engine_id id;
int err = 0;
- if (!RUNTIME_INFO(gt->i915)->cs_timestamp_frequency_hz) { /* unknown */
+ if (!gt->clock_frequency) { /* unknown */
pr_info("CS_TIMESTAMP frequency unknown\n");
return 0;
}
@@ -112,12 +112,12 @@ static int live_gt_clocks(void *arg)
measure_clocks(engine, &cycles, &dt);
- time = i915_cs_timestamp_ticks_to_ns(engine->i915, cycles);
- expected = i915_cs_timestamp_ns_to_ticks(engine->i915, dt);
+ time = intel_gt_clock_interval_to_ns(engine->gt, cycles);
+ expected = intel_gt_ns_to_clock_interval(engine->gt, dt);
pr_info("%s: TIMESTAMP %d cycles [%lldns] in %lldns [%d cycles], using CS clock frequency of %uKHz\n",
engine->name, cycles, time, dt, expected,
- RUNTIME_INFO(engine->i915)->cs_timestamp_frequency_hz / 1000);
+ engine->gt->clock_frequency / 1000);
if (9 * time < 8 * dt || 8 * time > 9 * dt) {
pr_err("%s: CS ticks did not match walltime!\n",
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 784219962193..dc1a732b3fdf 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1315,8 +1315,9 @@ static int i915_engine_info(struct seq_file *m, void *unused)
seq_printf(m, "GT awake? %s [%d]\n",
yesno(dev_priv->gt.awake),
atomic_read(&dev_priv->gt.wakeref.count));
- seq_printf(m, "CS timestamp frequency: %u Hz\n",
- RUNTIME_INFO(dev_priv)->cs_timestamp_frequency_hz);
+ seq_printf(m, "CS timestamp frequency: %u Hz, %d ns\n",
+ dev_priv->gt.clock_frequency,
+ dev_priv->gt.clock_period_ns);
p = drm_seq_file_printer(m);
for_each_uabi_engine(engine, dev_priv)
@@ -1410,7 +1411,7 @@ i915_perf_noa_delay_set(void *data, u64 val)
* This would lead to infinite waits as we're doing timestamp
* difference on the CS with only 32bits.
*/
- if (i915_cs_timestamp_ns_to_ticks(i915, val) > U32_MAX)
+ if (intel_gt_ns_to_clock_interval(&i915->gt, val) > U32_MAX)
return -EINVAL;
atomic64_set(&i915->perf.noa_programming_delay, val);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index bacb4c762f5b..677cb5153d52 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1977,16 +1977,4 @@ i915_coherent_map_type(struct drm_i915_private *i915)
return HAS_LLC(i915) ? I915_MAP_WB : I915_MAP_WC;
}
-static inline u64 i915_cs_timestamp_ns_to_ticks(struct drm_i915_private *i915, u64 val)
-{
- return DIV_ROUND_UP_ULL(val * RUNTIME_INFO(i915)->cs_timestamp_frequency_hz,
- 1000000000);
-}
-
-static inline u64 i915_cs_timestamp_ticks_to_ns(struct drm_i915_private *i915, u64 val)
-{
- return div_u64(val * 1000000000,
- RUNTIME_INFO(i915)->cs_timestamp_frequency_hz);
-}
-
#endif
diff --git a/drivers/gpu/drm/i915/i915_getparam.c b/drivers/gpu/drm/i915/i915_getparam.c
index f96032c60a12..75c3bfc2486e 100644
--- a/drivers/gpu/drm/i915/i915_getparam.c
+++ b/drivers/gpu/drm/i915/i915_getparam.c
@@ -154,7 +154,7 @@ int i915_getparam_ioctl(struct drm_device *dev, void *data,
return -ENODEV;
break;
case I915_PARAM_CS_TIMESTAMP_FREQUENCY:
- value = RUNTIME_INFO(i915)->cs_timestamp_frequency_hz;
+ value = i915->gt.clock_frequency;
break;
case I915_PARAM_MMAP_GTT_COHERENT:
value = INTEL_INFO(i915)->has_coherent_ggtt;
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 6a3a2ce0b394..2d76f3ddc571 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -482,7 +482,7 @@ static void error_print_context(struct drm_i915_error_state_buf *m,
const char *header,
const struct i915_gem_context_coredump *ctx)
{
- const u32 period = RUNTIME_INFO(m->i915)->cs_timestamp_period_ns;
+ const u32 period = m->i915->gt.clock_period_ns;
err_printf(m, "%s%s[%d] prio %d, guilty %d active %d, runtime total %lluns, avg %lluns\n",
header, ctx->comm, ctx->pid, ctx->sched_attr.priority,
diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index c6f6370283cf..fd2090116ae4 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -199,6 +199,7 @@
#include "gt/intel_engine_pm.h"
#include "gt/intel_engine_user.h"
#include "gt/intel_gt.h"
+#include "gt/intel_gt_clock_utils.h"
#include "gt/intel_lrc_reg.h"
#include "gt/intel_ring.h"
@@ -1613,7 +1614,8 @@ static int alloc_noa_wait(struct i915_perf_stream *stream)
struct drm_i915_gem_object *bo;
struct i915_vma *vma;
const u64 delay_ticks = 0xffffffffffffffff -
- i915_cs_timestamp_ns_to_ticks(i915, atomic64_read(&stream->perf->noa_programming_delay));
+ intel_gt_ns_to_clock_interval(stream->perf->i915->ggtt.vm.gt,
+ atomic64_read(&stream->perf->noa_programming_delay));
const u32 base = stream->engine->mmio_base;
#define CS_GPR(x) GEN8_RING_CS_GPR(base, x)
u32 *batch, *ts0, *cs, *jump;
@@ -3482,7 +3484,8 @@ i915_perf_open_ioctl_locked(struct i915_perf *perf,
static u64 oa_exponent_to_ns(struct i915_perf *perf, int exponent)
{
- return i915_cs_timestamp_ticks_to_ns(perf->i915, 2ULL << exponent);
+ return intel_gt_clock_interval_to_ns(perf->i915->ggtt.vm.gt,
+ 2ULL << exponent);
}
/**
@@ -4336,8 +4339,8 @@ void i915_perf_init(struct drm_i915_private *i915)
if (perf->ops.enable_metric_set) {
mutex_init(&perf->lock);
- oa_sample_rate_hard_limit =
- RUNTIME_INFO(i915)->cs_timestamp_frequency_hz / 2;
+ /* Choose a representative limit */
+ oa_sample_rate_hard_limit = i915->gt.clock_frequency / 2;
mutex_init(&perf->metrics_lock);
idr_init(&perf->metrics_idr);
diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
index e2aa5bc3a6e0..a75bca2f6c17 100644
--- a/drivers/gpu/drm/i915/intel_device_info.c
+++ b/drivers/gpu/drm/i915/intel_device_info.c
@@ -116,150 +116,6 @@ void intel_device_info_print_runtime(const struct intel_runtime_info *info,
struct drm_printer *p)
{
drm_printf(p, "rawclk rate: %u kHz\n", info->rawclk_freq);
- drm_printf(p, "CS timestamp frequency: %u Hz\n",
- info->cs_timestamp_frequency_hz);
-}
-
-static u32 read_reference_ts_freq(struct drm_i915_private *dev_priv)
-{
- u32 ts_override = intel_uncore_read(&dev_priv->uncore,
- GEN9_TIMESTAMP_OVERRIDE);
- u32 base_freq, frac_freq;
-
- base_freq = ((ts_override & GEN9_TIMESTAMP_OVERRIDE_US_COUNTER_DIVIDER_MASK) >>
- GEN9_TIMESTAMP_OVERRIDE_US_COUNTER_DIVIDER_SHIFT) + 1;
- base_freq *= 1000000;
-
- frac_freq = ((ts_override &
- GEN9_TIMESTAMP_OVERRIDE_US_COUNTER_DENOMINATOR_MASK) >>
- GEN9_TIMESTAMP_OVERRIDE_US_COUNTER_DENOMINATOR_SHIFT);
- frac_freq = 1000000 / (frac_freq + 1);
-
- return base_freq + frac_freq;
-}
-
-static u32 gen10_get_crystal_clock_freq(struct drm_i915_private *dev_priv,
- u32 rpm_config_reg)
-{
- u32 f19_2_mhz = 19200000;
- u32 f24_mhz = 24000000;
- u32 crystal_clock = (rpm_config_reg &
- GEN9_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_MASK) >>
- GEN9_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_SHIFT;
-
- switch (crystal_clock) {
- case GEN9_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_19_2_MHZ:
- return f19_2_mhz;
- case GEN9_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_24_MHZ:
- return f24_mhz;
- default:
- MISSING_CASE(crystal_clock);
- return 0;
- }
-}
-
-static u32 gen11_get_crystal_clock_freq(struct drm_i915_private *dev_priv,
- u32 rpm_config_reg)
-{
- u32 f19_2_mhz = 19200000;
- u32 f24_mhz = 24000000;
- u32 f25_mhz = 25000000;
- u32 f38_4_mhz = 38400000;
- u32 crystal_clock = (rpm_config_reg &
- GEN11_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_MASK) >>
- GEN11_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_SHIFT;
-
- switch (crystal_clock) {
- case GEN11_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_24_MHZ:
- return f24_mhz;
- case GEN11_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_19_2_MHZ:
- return f19_2_mhz;
- case GEN11_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_38_4_MHZ:
- return f38_4_mhz;
- case GEN11_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_25_MHZ:
- return f25_mhz;
- default:
- MISSING_CASE(crystal_clock);
- return 0;
- }
-}
-
-static u32 read_timestamp_frequency(struct drm_i915_private *dev_priv)
-{
- struct intel_uncore *uncore = &dev_priv->uncore;
- u32 f12_5_mhz = 12500000;
- u32 f19_2_mhz = 19200000;
- u32 f24_mhz = 24000000;
-
- if (INTEL_GEN(dev_priv) <= 4) {
- /* PRMs say:
- *
- * "The value in this register increments once every 16
- * hclks." (through the “Clocking Configuration”
- * (“CLKCFG”) MCHBAR register)
- */
- return RUNTIME_INFO(dev_priv)->rawclk_freq * 1000 / 16;
- } else if (INTEL_GEN(dev_priv) <= 8) {
- /* PRMs say:
- *
- * "The PCU TSC counts 10ns increments; this timestamp
- * reflects bits 38:3 of the TSC (i.e. 80ns granularity,
- * rolling over every 1.5 hours).
- */
- return f12_5_mhz;
- } else if (INTEL_GEN(dev_priv) <= 9) {
- u32 ctc_reg = intel_uncore_read(uncore, CTC_MODE);
- u32 freq = 0;
-
- if ((ctc_reg & CTC_SOURCE_PARAMETER_MASK) == CTC_SOURCE_DIVIDE_LOGIC) {
- freq = read_reference_ts_freq(dev_priv);
- } else {
- freq = IS_GEN9_LP(dev_priv) ? f19_2_mhz : f24_mhz;
-
- /* Now figure out how the command stream's timestamp
- * register increments from this frequency (it might
- * increment only every few clock cycle).
- */
- freq >>= 3 - ((ctc_reg & CTC_SHIFT_PARAMETER_MASK) >>
- CTC_SHIFT_PARAMETER_SHIFT);
- }
-
- return freq;
- } else if (INTEL_GEN(dev_priv) <= 12) {
- u32 ctc_reg = intel_uncore_read(uncore, CTC_MODE);
- u32 freq = 0;
-
- /* First figure out the reference frequency. There are 2 ways
- * we can compute the frequency, either through the
- * TIMESTAMP_OVERRIDE register or through RPM_CONFIG. CTC_MODE
- * tells us which one we should use.
- */
- if ((ctc_reg & CTC_SOURCE_PARAMETER_MASK) == CTC_SOURCE_DIVIDE_LOGIC) {
- freq = read_reference_ts_freq(dev_priv);
- } else {
- u32 rpm_config_reg = intel_uncore_read(uncore, RPM_CONFIG0);
-
- if (INTEL_GEN(dev_priv) <= 10)
- freq = gen10_get_crystal_clock_freq(dev_priv,
- rpm_config_reg);
- else
- freq = gen11_get_crystal_clock_freq(dev_priv,
- rpm_config_reg);
-
- /* Now figure out how the command stream's timestamp
- * register increments from this frequency (it might
- * increment only every few clock cycle).
- */
- freq >>= 3 - ((rpm_config_reg &
- GEN10_RPM_CONFIG0_CTC_SHIFT_PARAMETER_MASK) >>
- GEN10_RPM_CONFIG0_CTC_SHIFT_PARAMETER_SHIFT);
- }
-
- return freq;
- }
-
- MISSING_CASE("Unknown gen, unable to read command streamer timestamp frequency\n");
- return 0;
}
#undef INTEL_VGA_DEVICE
@@ -503,19 +359,6 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv)
runtime->rawclk_freq = intel_read_rawclk(dev_priv);
drm_dbg(&dev_priv->drm, "rawclk rate: %d kHz\n", runtime->rawclk_freq);
-
- /* Initialize command stream timestamp frequency */
- runtime->cs_timestamp_frequency_hz =
- read_timestamp_frequency(dev_priv);
- if (runtime->cs_timestamp_frequency_hz) {
- runtime->cs_timestamp_period_ns =
- i915_cs_timestamp_ticks_to_ns(dev_priv, 1);
- drm_dbg(&dev_priv->drm,
- "CS timestamp wraparound in %lldms\n",
- div_u64(mul_u32_u32(runtime->cs_timestamp_period_ns,
- S32_MAX),
- USEC_PER_SEC));
- }
}
void intel_driver_caps_print(const struct intel_driver_caps *caps,
diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
index 6a3d607218aa..8ae896772fd8 100644
--- a/drivers/gpu/drm/i915/intel_device_info.h
+++ b/drivers/gpu/drm/i915/intel_device_info.h
@@ -223,9 +223,6 @@ struct intel_runtime_info {
u8 num_scalers[I915_MAX_PIPES];
u32 rawclk_freq;
-
- u32 cs_timestamp_frequency_hz;
- u32 cs_timestamp_period_ns;
};
struct intel_driver_caps {
diff --git a/drivers/gpu/drm/i915/selftests/i915_perf.c b/drivers/gpu/drm/i915/selftests/i915_perf.c
index debbac660519..e9d86dab8677 100644
--- a/drivers/gpu/drm/i915/selftests/i915_perf.c
+++ b/drivers/gpu/drm/i915/selftests/i915_perf.c
@@ -262,7 +262,7 @@ static int live_noa_delay(void *arg)
delay = intel_read_status_page(stream->engine, 0x102);
delay -= intel_read_status_page(stream->engine, 0x100);
- delay = i915_cs_timestamp_ticks_to_ns(i915, delay);
+ delay = intel_gt_clock_interval_to_ns(stream->engine->gt, delay);
pr_info("GPU delay: %uns, expected %lluns\n",
delay, expected);
diff --git a/drivers/gpu/drm/i915/selftests/i915_request.c b/drivers/gpu/drm/i915/selftests/i915_request.c
index c1dcd4b91bda..9242cbaa770e 100644
--- a/drivers/gpu/drm/i915/selftests/i915_request.c
+++ b/drivers/gpu/drm/i915/selftests/i915_request.c
@@ -33,6 +33,7 @@
#include "gt/intel_engine_pm.h"
#include "gt/intel_engine_user.h"
#include "gt/intel_gt.h"
+#include "gt/intel_gt_clock_utils.h"
#include "gt/intel_gt_requests.h"
#include "gt/selftest_engine_heartbeat.h"
@@ -1554,7 +1555,7 @@ static u32 trifilter(u32 *a)
static u64 cycles_to_ns(struct intel_engine_cs *engine, u32 cycles)
{
- u64 ns = i915_cs_timestamp_ticks_to_ns(engine->i915, cycles);
+ u64 ns = intel_gt_clock_interval_to_ns(engine->gt, cycles);
return DIV_ROUND_CLOSEST(ns, 1 << TF_BIAS);
}
--
2.20.1
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