From 937cc55fc1ba574322670bb79800159f6a4a2670 Mon Sep 17 00:00:00 2001
From: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Date: Thu, 16 Dec 2021 15:30:22 -0800
Subject: drm/i915/guc: Request RP0 before loading firmware
Git-commit: 1c40d40f6835cdee99c6966b48b98d0e38c35f47
Patch-mainline: v5.17-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
By default, GT (and GuC) run at RPn. Requesting for RP0
before firmware load can speed up DMA and HuC auth as well.
In addition to writing to 0xA008, we also need to enable
swreq in 0xA024 so that Punit will pay heed to our request.
SLPC will restore the frequency back to RPn after initialization,
but we need to manually do that for the non-SLPC path.
We don't need a manual override in the SLPC disabled case, just
use the intel_rps_set function to ensure consistent RPS state.
Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Reviewed-by: Sujaritha Sundaresan <sujaritha.sundaresan@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211216233022.21351-1-vinay.belgaumkar@intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/gt/intel_rps.c | 59 +++++++++++++++++++++++++++
drivers/gpu/drm/i915/gt/intel_rps.h | 2 +
drivers/gpu/drm/i915/gt/uc/intel_uc.c | 9 ++++
drivers/gpu/drm/i915/i915_reg.h | 4 ++
4 files changed, 74 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c
index 36eb980d757e..54e7df788dbf 100644
--- a/drivers/gpu/drm/i915/gt/intel_rps.c
+++ b/drivers/gpu/drm/i915/gt/intel_rps.c
@@ -2226,6 +2226,65 @@ u32 intel_rps_read_state_cap(struct intel_rps *rps)
return intel_uncore_read(uncore, GEN6_RP_STATE_CAP);
}
+static void intel_rps_set_manual(struct intel_rps *rps, bool enable)
+{
+ struct intel_uncore *uncore = rps_to_uncore(rps);
+ u32 state = enable ? GEN9_RPSWCTL_ENABLE : GEN9_RPSWCTL_DISABLE;
+
+ /* Allow punit to process software requests */
+ intel_uncore_write(uncore, GEN6_RP_CONTROL, state);
+}
+
+void intel_rps_raise_unslice(struct intel_rps *rps)
+{
+ struct intel_uncore *uncore = rps_to_uncore(rps);
+ u32 rp0_unslice_req;
+
+ mutex_lock(&rps->lock);
+
+ if (rps_uses_slpc(rps)) {
+ /* RP limits have not been initialized yet for SLPC path */
+ rp0_unslice_req = ((intel_rps_read_state_cap(rps) >> 0)
+ & 0xff) * GEN9_FREQ_SCALER;
+
+ intel_rps_set_manual(rps, true);
+ intel_uncore_write(uncore, GEN6_RPNSWREQ,
+ ((rp0_unslice_req <<
+ GEN9_SW_REQ_UNSLICE_RATIO_SHIFT) |
+ GEN9_IGNORE_SLICE_RATIO));
+ intel_rps_set_manual(rps, false);
+ } else {
+ intel_rps_set(rps, rps->rp0_freq);
+ }
+
+ mutex_unlock(&rps->lock);
+}
+
+void intel_rps_lower_unslice(struct intel_rps *rps)
+{
+ struct intel_uncore *uncore = rps_to_uncore(rps);
+ u32 rpn_unslice_req;
+
+ mutex_lock(&rps->lock);
+
+ if (rps_uses_slpc(rps)) {
+ /* RP limits have not been initialized yet for SLPC path */
+ rpn_unslice_req = ((intel_rps_read_state_cap(rps) >> 16)
+ & 0xff) * GEN9_FREQ_SCALER;
+
+ intel_rps_set_manual(rps, true);
+ intel_uncore_write(uncore, GEN6_RPNSWREQ,
+ ((rpn_unslice_req <<
+ GEN9_SW_REQ_UNSLICE_RATIO_SHIFT) |
+ GEN9_IGNORE_SLICE_RATIO));
+ intel_rps_set_manual(rps, false);
+ } else {
+ intel_rps_set(rps, rps->min_freq);
+ }
+
+ mutex_unlock(&rps->lock);
+}
+
/* External interface for intel_ips.ko */
static struct drm_i915_private __rcu *ips_mchdev;
diff --git a/drivers/gpu/drm/i915/gt/intel_rps.h b/drivers/gpu/drm/i915/gt/intel_rps.h
index aee12f37d38a..c6d76a3d1331 100644
--- a/drivers/gpu/drm/i915/gt/intel_rps.h
+++ b/drivers/gpu/drm/i915/gt/intel_rps.h
@@ -45,6 +45,8 @@ 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_state_cap(struct intel_rps *rps);
+void intel_rps_raise_unslice(struct intel_rps *rps);
+void intel_rps_lower_unslice(struct intel_rps *rps);
void gen5_rps_irq_handler(struct intel_rps *rps);
void gen6_rps_irq_handler(struct intel_rps *rps, u32 pm_iir);
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
index 8f17005ce85f..09ed29df67bc 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
@@ -8,6 +8,7 @@
#include "intel_guc.h"
#include "intel_guc_ads.h"
#include "intel_guc_submission.h"
+#include "gt/intel_rps.h"
#include "intel_uc.h"
#include "i915_drv.h"
@@ -462,6 +463,8 @@ static int __uc_init_hw(struct intel_uc *uc)
else
attempts = 1;
+ intel_rps_raise_unslice(&uc_to_gt(uc)->rps);
+
while (attempts--) {
/*
* Always reset the GuC just before (re)loading, so
@@ -499,6 +502,9 @@ static int __uc_init_hw(struct intel_uc *uc)
ret = intel_guc_slpc_enable(&guc->slpc);
if (ret)
goto err_submission;
+ } else {
+ /* Restore GT back to RPn for non-SLPC path */
+ intel_rps_lower_unslice(&uc_to_gt(uc)->rps);
}
drm_info(&i915->drm, "%s firmware %s version %u.%u %s:%s\n",
@@ -529,6 +535,9 @@ static int __uc_init_hw(struct intel_uc *uc)
err_log_capture:
__uc_capture_load_err_log(uc);
err_out:
+ /* Return GT back to RPn */
+ intel_rps_lower_unslice(&uc_to_gt(uc)->rps);
+
__uc_sanitize(uc);
if (!ret) {
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index d27ba273cc68..4c28dadf8d69 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -9417,6 +9417,7 @@ enum {
#define GEN6_OFFSET(x) ((x) << 19)
#define GEN6_AGGRESSIVE_TURBO (0 << 15)
#define GEN9_SW_REQ_UNSLICE_RATIO_SHIFT 23
+#define GEN9_IGNORE_SLICE_RATIO (0 << 0)
#define GEN6_RC_VIDEO_FREQ _MMIO(0xA00C)
#define GEN6_RC_CONTROL _MMIO(0xA090)
@@ -9452,6 +9453,9 @@ enum {
#define GEN6_RP_UP_BUSY_CONT (0x4 << 3)
#define GEN6_RP_DOWN_IDLE_AVG (0x2 << 0)
#define GEN6_RP_DOWN_IDLE_CONT (0x1 << 0)
+#define GEN6_RPSWCTL_SHIFT 9
+#define GEN9_RPSWCTL_ENABLE (0x2 << GEN6_RPSWCTL_SHIFT)
+#define GEN9_RPSWCTL_DISABLE (0x0 << GEN6_RPSWCTL_SHIFT)
#define GEN6_RP_UP_THRESHOLD _MMIO(0xA02C)
#define GEN6_RP_DOWN_THRESHOLD _MMIO(0xA030)
#define GEN6_RP_CUR_UP_EI _MMIO(0xA050)
--
2.38.1