[Intel-gfx] [PATCH 7/9] drm/i915: Rename the forcewake get/put functions
Mika Kuoppala
mika.kuoppala at linux.intel.com
Fri Jan 16 01:34:40 PST 2015
From: Mika Kuoppala <mika.kuoppala at linux.intel.com>
We have multiple forcewake domains now on recent gens. Change the
function naming to reflect this.
v2: More verbose names (Chris)
v3: Rebase
v4: Rebase
v5: Add documentation for forcewake_get/put
Signed-off-by: Mika Kuoppala <mika.kuoppala at intel.com>
Reviewed-by: Deepak S <deepak.s at linux.intel.com> (v2)
---
drivers/gpu/drm/i915/i915_debugfs.c | 8 +++---
drivers/gpu/drm/i915/i915_drv.c | 2 +-
drivers/gpu/drm/i915/i915_drv.h | 15 ++++-------
drivers/gpu/drm/i915/intel_display.c | 4 +--
drivers/gpu/drm/i915/intel_fbc.c | 4 +--
drivers/gpu/drm/i915/intel_lrc.c | 4 +--
drivers/gpu/drm/i915/intel_pm.c | 25 +++++++++----------
drivers/gpu/drm/i915/intel_ringbuffer.c | 4 +--
drivers/gpu/drm/i915/intel_uncore.c | 44 +++++++++++++++++++++------------
9 files changed, 58 insertions(+), 52 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 1f8e444..c9dbf58 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1105,7 +1105,7 @@ static int i915_frequency_info(struct seq_file *m, void *unused)
if (ret)
goto out;
- gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
reqf = I915_READ(GEN6_RPNSWREQ);
reqf &= ~GEN6_TURBO_DISABLE;
@@ -1132,7 +1132,7 @@ static int i915_frequency_info(struct seq_file *m, void *unused)
cagf = (rpstat & GEN6_CAGF_MASK) >> GEN6_CAGF_SHIFT;
cagf *= GT_FREQUENCY_MULTIPLIER;
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
mutex_unlock(&dev->struct_mutex);
if (IS_GEN6(dev) || IS_GEN7(dev)) {
@@ -4318,7 +4318,7 @@ static int i915_forcewake_open(struct inode *inode, struct file *file)
return 0;
intel_runtime_pm_get(dev_priv);
- gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
return 0;
}
@@ -4331,7 +4331,7 @@ static int i915_forcewake_release(struct inode *inode, struct file *file)
if (INTEL_INFO(dev)->gen < 6)
return 0;
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
intel_runtime_pm_put(dev_priv);
return 0;
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 55a3fef..6484229 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1431,7 +1431,7 @@ static int intel_runtime_suspend(struct device *device)
intel_opregion_notify_adapter(dev, PCI_D3hot);
}
- assert_force_wake_inactive(dev_priv);
+ assert_forcewakes_inactive(dev_priv);
DRM_DEBUG_KMS("Device suspended\n");
return 0;
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 3262b3f..8f9b43d 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2518,6 +2518,11 @@ extern void intel_uncore_check_errors(struct drm_device *dev);
extern void intel_uncore_fini(struct drm_device *dev);
extern void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore);
const char *intel_uncore_forcewake_domain_to_str(const int domain_id);
+void intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
+ unsigned fw_domains);
+void intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
+ unsigned fw_domains);
+void assert_forcewakes_inactive(struct drm_i915_private *dev_priv);
void
i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
@@ -3149,16 +3154,6 @@ extern void intel_display_print_error_state(struct drm_i915_error_state_buf *e,
struct drm_device *dev,
struct intel_display_error_state *error);
-/* On SNB platform, before reading ring registers forcewake bit
- * must be set to prevent GT core from power down and stale values being
- * returned.
- */
-void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv,
- unsigned fw_domains);
-void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv,
- unsigned fw_domains);
-void assert_force_wake_inactive(struct drm_i915_private *dev_priv);
-
int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u32 mbox, u32 *val);
int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u32 mbox, u32 val);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 043b7a6..887d22a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7863,7 +7863,7 @@ static void hsw_restore_lcpll(struct drm_i915_private *dev_priv)
* Make sure we're not on PC8 state before disabling PC8, otherwise
* we'll hang the machine. To prevent PC8 state, just enable force_wake.
*/
- gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
if (val & LCPLL_POWER_DOWN_ALLOW) {
val &= ~LCPLL_POWER_DOWN_ALLOW;
@@ -7893,7 +7893,7 @@ static void hsw_restore_lcpll(struct drm_i915_private *dev_priv)
DRM_ERROR("Switching back to LCPLL failed\n");
}
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
}
/*
diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c
index 4daceae..58ede3c 100644
--- a/drivers/gpu/drm/i915/intel_fbc.c
+++ b/drivers/gpu/drm/i915/intel_fbc.c
@@ -182,7 +182,7 @@ static void snb_fbc_blit_update(struct drm_device *dev)
/* Blitter is part of Media powerwell on VLV. No impact of
* his param in other platforms for now */
- gen6_gt_force_wake_get(dev_priv, FORCEWAKE_MEDIA);
+ intel_uncore_forcewake_get(dev_priv, FORCEWAKE_MEDIA);
blt_ecoskpd = I915_READ(GEN6_BLITTER_ECOSKPD);
blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY <<
@@ -195,7 +195,7 @@ static void snb_fbc_blit_update(struct drm_device *dev)
I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
POSTING_READ(GEN6_BLITTER_ECOSKPD);
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_MEDIA);
+ intel_uncore_forcewake_put(dev_priv, FORCEWAKE_MEDIA);
}
static void ilk_fbc_enable(struct drm_crtc *crtc)
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index ce338e6..5780675 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -296,7 +296,7 @@ static void execlists_elsp_write(struct intel_engine_cs *ring,
desc[3] = (u32)(temp >> 32);
desc[2] = (u32)temp;
- gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
I915_WRITE(RING_ELSP(ring), desc[1]);
I915_WRITE(RING_ELSP(ring), desc[0]);
I915_WRITE(RING_ELSP(ring), desc[3]);
@@ -306,7 +306,7 @@ static void execlists_elsp_write(struct intel_engine_cs *ring,
/* ELSP is a wo register, so use another nearby reg for posting instead */
POSTING_READ(RING_EXECLIST_STATUS(ring));
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
}
static int execlists_update_context(struct drm_i915_gem_object *ctx_obj,
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 66a1c7f..f065a9d 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -76,7 +76,6 @@ static void gen9_init_clock_gating(struct drm_device *dev)
_MASKED_BIT_ENABLE(GEN8_4x4_STC_OPTIMIZATION_DISABLE));
}
-
static void i915_pineview_get_mem_freq(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@@ -3923,11 +3922,11 @@ static void valleyview_disable_rps(struct drm_device *dev)
/* we're doing forcewake before Disabling RC6,
* This what the BIOS expects when going into suspend */
- gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
I915_WRITE(GEN6_RC_CONTROL, 0);
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
}
static void intel_print_rc6_info(struct drm_device *dev, u32 mode)
@@ -4045,7 +4044,7 @@ static void gen9_enable_rps(struct drm_device *dev)
/* 1b: Get forcewake during program sequence. Although the driver
* hasn't enabled a state yet where we need forcewake, BIOS may have.*/
- gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
/* 2a: Disable RC states. */
I915_WRITE(GEN6_RC_CONTROL, 0);
@@ -4068,7 +4067,7 @@ static void gen9_enable_rps(struct drm_device *dev)
GEN6_RC_CTL_EI_MODE(1) |
rc6_mask);
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
}
@@ -4084,7 +4083,7 @@ static void gen8_enable_rps(struct drm_device *dev)
/* 1c & 1d: Get forcewake during program sequence. Although the driver
* hasn't enabled a state yet where we need forcewake, BIOS may have.*/
- gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
/* 2a: Disable RC states. */
I915_WRITE(GEN6_RC_CONTROL, 0);
@@ -4151,7 +4150,7 @@ static void gen8_enable_rps(struct drm_device *dev)
dev_priv->rps.power = HIGH_POWER; /* force a reset */
gen6_set_rps(dev_priv->dev, dev_priv->rps.min_freq_softlimit);
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
}
static void gen6_enable_rps(struct drm_device *dev)
@@ -4179,7 +4178,7 @@ static void gen6_enable_rps(struct drm_device *dev)
I915_WRITE(GTFIFODBG, gtfifodbg);
}
- gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
/* Initialize rps frequencies */
gen6_init_rps_frequencies(dev);
@@ -4259,7 +4258,7 @@ static void gen6_enable_rps(struct drm_device *dev)
DRM_ERROR("Couldn't fix incorrect rc6 voltage\n");
}
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
}
static void __gen6_update_ring_freq(struct drm_device *dev)
@@ -4678,7 +4677,7 @@ static void cherryview_enable_rps(struct drm_device *dev)
/* 1a & 1b: Get forcewake during program sequence. Although the driver
* hasn't enabled a state yet where we need forcewake, BIOS may have.*/
- gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
/* 2a: Program RC6 thresholds.*/
I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16);
@@ -4746,7 +4745,7 @@ static void cherryview_enable_rps(struct drm_device *dev)
valleyview_set_rps(dev_priv->dev, dev_priv->rps.efficient_freq);
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
}
static void valleyview_enable_rps(struct drm_device *dev)
@@ -4767,7 +4766,7 @@ static void valleyview_enable_rps(struct drm_device *dev)
}
/* If VLV, Forcewake all wells, else re-direct to regular path */
- gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400);
I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000);
@@ -4827,7 +4826,7 @@ static void valleyview_enable_rps(struct drm_device *dev)
valleyview_set_rps(dev_priv->dev, dev_priv->rps.efficient_freq);
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
}
void ironlake_teardown_rc6(struct drm_device *dev)
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index dabc1d8..7fd0afc 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -539,7 +539,7 @@ static int init_ring_common(struct intel_engine_cs *ring)
struct drm_i915_gem_object *obj = ringbuf->obj;
int ret = 0;
- gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
if (!stop_ring(ring)) {
/* G45 ring initialization often fails to reset head to zero */
@@ -611,7 +611,7 @@ static int init_ring_common(struct intel_engine_cs *ring)
memset(&ring->hangcheck, 0, sizeof(ring->hangcheck));
out:
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+ intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
return ret;
}
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index b97f3c5..886ff6d 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -232,7 +232,7 @@ static int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)
return ret;
}
-static void gen6_force_wake_timer(unsigned long arg)
+static void intel_uncore_fw_release_timer(unsigned long arg)
{
struct intel_uncore_forcewake_domain *domain = (void *)arg;
unsigned long irqflags;
@@ -268,7 +268,7 @@ void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore)
if (del_timer_sync(&domain->timer) == 0)
continue;
- gen6_force_wake_timer((unsigned long)domain);
+ intel_uncore_fw_release_timer((unsigned long)domain);
}
spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
@@ -312,7 +312,7 @@ void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore)
}
if (!restore)
- assert_force_wake_inactive(dev_priv);
+ assert_forcewakes_inactive(dev_priv);
spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
}
@@ -356,14 +356,21 @@ void intel_uncore_sanitize(struct drm_device *dev)
intel_disable_gt_powersave(dev);
}
-/*
- * Generally this is called implicitly by the register read function. However,
- * if some sequence requires the GT to not power down then this function should
- * be called at the beginning of the sequence followed by a call to
- * gen6_gt_force_wake_put() at the end of the sequence.
+/**
+ * intel_uncore_forcewake_get - grab forcewake domain references
+ * @dev_priv: i915 device instance
+ * @fw_domains: forcewake domains to get reference on
+ *
+ * This function can be used get GT's forcewake domain references.
+ * Normal register access will handle the forcewake domains automatically.
+ * However if some sequence requires the GT to not power down a particular
+ * forcewake domains this function should be called at the beginning of the
+ * sequence. And subsequently the reference should be dropped by symmetric
+ * call to intel_unforce_forcewake_put(). Usually caller wants all the domains
+ * to be kept awake so the @fw_domains would be then FORCEWAKE_ALL.
*/
-void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv,
- unsigned fw_domains)
+void intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
+ unsigned fw_domains)
{
unsigned long irqflags;
struct intel_uncore_forcewake_domain *domain;
@@ -389,11 +396,16 @@ void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv,
spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
}
-/*
- * see gen6_gt_force_wake_get()
+/**
+ * intel_uncore_forcewake_put - release a forcewake domain reference
+ * @dev_priv: i915 device instance
+ * @fw_domains: forcewake domains to put references
+ *
+ * This function drops the device-level forcewakes for specified
+ * domains obtained by intel_uncore_forcewake_get().
*/
-void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv,
- unsigned fw_domains)
+void intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
+ unsigned fw_domains)
{
unsigned long irqflags;
struct intel_uncore_forcewake_domain *domain;
@@ -420,7 +432,7 @@ void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv,
spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
}
-void assert_force_wake_inactive(struct drm_i915_private *dev_priv)
+void assert_forcewakes_inactive(struct drm_i915_private *dev_priv)
{
struct intel_uncore_forcewake_domain *domain;
int id;
@@ -962,7 +974,7 @@ static void fw_domain_init(struct drm_i915_private *dev_priv,
d->i915 = dev_priv;
d->id = domain_id;
- setup_timer(&d->timer, gen6_force_wake_timer, (unsigned long)d);
+ setup_timer(&d->timer, intel_uncore_fw_release_timer, (unsigned long)d);
dev_priv->uncore.fw_domains |= (1 << domain_id);
}
--
1.9.1
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