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From: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
Subject: [Intel-gfx] [PATCH 08/14] drm/i915/guc/slpc: Add get max/min freq hooks
Date: Wed, 28 Jul 2021 14:11:38 -0700	[thread overview]
Message-ID: <20210728211144.15322-9-vinay.belgaumkar@intel.com> (raw)
In-Reply-To: <20210728211144.15322-1-vinay.belgaumkar@intel.com>

Add helpers to read the min/max frequency being used
by SLPC. This is done by send a H2G command which forces
SLPC to update the shared data struct which can then be
read. These helpers will be used in a sysfs patch later
on.

v2: Address review comments (Michal W)
v3: Return err in case of query failure (Michal W)

Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Signed-off-by: Sundaresan Sujaritha <sujaritha.sundaresan@intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c | 54 +++++++++++++++++++++
 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h |  2 +
 2 files changed, 56 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
index 0959cc9e104a..816c9ee301bf 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
@@ -320,6 +320,33 @@ int intel_guc_slpc_set_max_freq(struct intel_guc_slpc *slpc, u32 val)
 	return ret;
 }
 
+/**
+ * intel_guc_slpc_get_max_freq() - Get max frequency limit for SLPC.
+ * @slpc: pointer to intel_guc_slpc.
+ * @val: pointer to val which will hold max frequency (MHz)
+ *
+ * This function will invoke GuC SLPC action to read the max frequency
+ * limit for unslice.
+ *
+ * Return: 0 on success, non-zero error code on failure.
+ */
+int intel_guc_slpc_get_max_freq(struct intel_guc_slpc *slpc, u32 *val)
+{
+	struct drm_i915_private *i915 = slpc_to_i915(slpc);
+	intel_wakeref_t wakeref;
+	int ret = 0;
+
+	with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
+		/* Force GuC to update task data */
+		ret = slpc_query_task_state(slpc);
+
+		if (!ret)
+			*val = slpc_decode_max_freq(slpc);
+	}
+
+	return ret;
+}
+
 /**
  * intel_guc_slpc_set_min_freq() - Set min frequency limit for SLPC.
  * @slpc: pointer to intel_guc_slpc.
@@ -349,6 +376,33 @@ int intel_guc_slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 val)
 	return ret;
 }
 
+/**
+ * intel_guc_slpc_get_min_freq() - Get min frequency limit for SLPC.
+ * @slpc: pointer to intel_guc_slpc.
+ * @val: pointer to val which will hold min frequency (MHz)
+ *
+ * This function will invoke GuC SLPC action to read the min frequency
+ * limit for unslice.
+ *
+ * Return: 0 on success, non-zero error code on failure.
+ */
+int intel_guc_slpc_get_min_freq(struct intel_guc_slpc *slpc, u32 *val)
+{
+	struct drm_i915_private *i915 = slpc_to_i915(slpc);
+	intel_wakeref_t wakeref;
+	int ret = 0;
+
+	with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
+		/* Force GuC to update task data */
+		ret = slpc_query_task_state(slpc);
+
+		if (!ret)
+			*val = slpc_decode_min_freq(slpc);
+	}
+
+	return ret;
+}
+
 /*
  * intel_guc_slpc_enable() - Start SLPC
  * @slpc: pointer to intel_guc_slpc.
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
index 788d87ff7b58..78a7893ce489 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
@@ -31,5 +31,7 @@ int intel_guc_slpc_enable(struct intel_guc_slpc *slpc);
 void intel_guc_slpc_fini(struct intel_guc_slpc *slpc);
 int intel_guc_slpc_set_max_freq(struct intel_guc_slpc *slpc, u32 val);
 int intel_guc_slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 val);
+int intel_guc_slpc_get_max_freq(struct intel_guc_slpc *slpc, u32 *val);
+int intel_guc_slpc_get_min_freq(struct intel_guc_slpc *slpc, u32 *val);
 
 #endif
-- 
2.25.0

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  parent reply	other threads:[~2021-07-28 21:12 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-28 21:11 [Intel-gfx] [PATCH v4 00/14] drm/i915/guc/slpc: Enable GuC based power management features Vinay Belgaumkar
2021-07-28 21:11 ` [Intel-gfx] [PATCH 01/14] drm/i915/guc/slpc: Initial definitions for SLPC Vinay Belgaumkar
2021-07-29 15:28   ` Michal Wajdeczko
2021-07-28 21:11 ` [Intel-gfx] [PATCH 02/14] drm/i915/guc/slpc: Gate Host RPS when SLPC is enabled Vinay Belgaumkar
2021-07-28 21:11 ` [Intel-gfx] [PATCH 03/14] drm/i915/guc/slpc: Adding SLPC communication interfaces Vinay Belgaumkar
2021-07-29 15:33   ` Michal Wajdeczko
2021-07-28 21:11 ` [Intel-gfx] [PATCH 04/14] drm/i915/guc/slpc: Allocate, initialize and release SLPC Vinay Belgaumkar
2021-07-28 21:11 ` [Intel-gfx] [PATCH 05/14] drm/i915/guc/slpc: Enable SLPC and add related H2G events Vinay Belgaumkar
2021-07-29 15:48   ` Michal Wajdeczko
2021-07-28 21:11 ` [Intel-gfx] [PATCH 06/14] drm/i915/guc/slpc: Remove BUG_ON in guc_submission_disable Vinay Belgaumkar
2021-07-28 21:11 ` [Intel-gfx] [PATCH 07/14] drm/i915/guc/slpc: Add methods to set min/max frequency Vinay Belgaumkar
2021-07-29 16:33   ` Michal Wajdeczko
2021-07-28 21:11 ` Vinay Belgaumkar [this message]
2021-07-28 21:11 ` [Intel-gfx] [PATCH 09/14] drm/i915/guc/slpc: Add debugfs for SLPC info Vinay Belgaumkar
2021-07-28 21:11 ` [Intel-gfx] [PATCH 10/14] drm/i915/guc/slpc: Enable ARAT timer interrupt Vinay Belgaumkar
2021-07-28 21:11 ` [Intel-gfx] [PATCH 11/14] drm/i915/guc/slpc: Cache platform frequency limits Vinay Belgaumkar
2021-07-29 16:21   ` Michal Wajdeczko
2021-07-29 17:24     ` Belgaumkar, Vinay
2021-07-28 21:11 ` [Intel-gfx] [PATCH 12/14] drm/i915/guc/slpc: Sysfs hooks for SLPC Vinay Belgaumkar
2021-07-29 20:28   ` Michal Wajdeczko
2021-07-28 21:11 ` [Intel-gfx] [PATCH 13/14] drm/i915/guc/slpc: Add SLPC selftest Vinay Belgaumkar
2021-07-29 23:40   ` Matthew Brost
2021-07-30  1:12     ` Belgaumkar, Vinay
2021-07-30  1:45   ` kernel test robot
2021-07-28 21:11 ` [Intel-gfx] [PATCH 14/14] drm/i915/guc/rc: Setup and enable GuCRC feature Vinay Belgaumkar
2021-07-28 22:52 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for drm/i915/guc/slpc: Enable GuC based power management features (rev2) Patchwork
2021-07-28 22:54 ` [Intel-gfx] ✗ Fi.CI.SPARSE: " Patchwork
2021-07-28 23:21 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2021-07-29  4:23 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
  -- strict thread matches above, loose matches on Subject: below --
2021-07-30 20:21 [Intel-gfx] [PATCH v6 00/14] drm/i915/guc/slpc: Enable GuC based power management features Vinay Belgaumkar
2021-07-30 20:21 ` [Intel-gfx] [PATCH 08/14] drm/i915/guc/slpc: Add get max/min freq hooks Vinay Belgaumkar
2021-07-30  2:00 [Intel-gfx] [PATCH v5 00/14] drm/i915/guc/slpc: Enable GuC based power management features Vinay Belgaumkar
2021-07-30  2:01 ` [Intel-gfx] [PATCH 08/14] drm/i915/guc/slpc: Add get max/min freq hooks Vinay Belgaumkar
2021-07-21 16:11 [Intel-gfx] [PATCH v2 00/14] drm/i915/guc: Enable GuC based power management features Vinay Belgaumkar
2021-07-21 16:11 ` [Intel-gfx] [PATCH 08/14] drm/i915/guc/slpc: Add get max/min freq hooks Vinay Belgaumkar
2021-07-21 18:00   ` Michal Wajdeczko
2021-07-23 19:43     ` Belgaumkar, Vinay

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