[PATCH 2/5] drm/i915: Skip unused fw_domains
Chris Wilson
chris at chris-wilson.co.uk
Wed Mar 22 11:17:30 UTC 2017
Use find-first-set bitop to quickly scan through the fw_domains mask and
skip iterating over unused domains.
v2: Move the WARN into the caller, to prevent compiler warnings in
normal builds.
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_debugfs.c | 3 ++-
drivers/gpu/drm/i915/i915_drv.h | 30 +++++++++++------------
drivers/gpu/drm/i915/intel_uncore.c | 48 ++++++++++++++++++++++++-------------
3 files changed, 48 insertions(+), 33 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 29bf11d8b620..fcac795d4396 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1461,9 +1461,10 @@ static int i915_forcewake_domains(struct seq_file *m, void *data)
{
struct drm_i915_private *dev_priv = node_to_i915(m->private);
struct intel_uncore_forcewake_domain *fw_domain;
+ unsigned int tmp;
spin_lock_irq(&dev_priv->uncore.lock);
- for_each_fw_domain(fw_domain, dev_priv) {
+ for_each_fw_domain(fw_domain, dev_priv, tmp) {
seq_printf(m, "%s.wake_count = %u\n",
intel_uncore_forcewake_domain_to_str(fw_domain->id),
fw_domain->wake_count);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 4c9de7d00eaf..589f91c4e585 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -703,9 +703,9 @@ enum forcewake_domain_id {
};
enum forcewake_domains {
- FORCEWAKE_RENDER = (1 << FW_DOMAIN_ID_RENDER),
- FORCEWAKE_BLITTER = (1 << FW_DOMAIN_ID_BLITTER),
- FORCEWAKE_MEDIA = (1 << FW_DOMAIN_ID_MEDIA),
+ FORCEWAKE_RENDER = BIT(FW_DOMAIN_ID_RENDER),
+ FORCEWAKE_BLITTER = BIT(FW_DOMAIN_ID_BLITTER),
+ FORCEWAKE_MEDIA = BIT(FW_DOMAIN_ID_MEDIA),
FORCEWAKE_ALL = (FORCEWAKE_RENDER |
FORCEWAKE_BLITTER |
FORCEWAKE_MEDIA)
@@ -790,15 +790,19 @@ struct intel_uncore {
int unclaimed_mmio_check;
};
+#define __mask_next_bit(mask) ({ \
+ int __idx = ffs(mask) - 1; \
+ mask &= ~BIT(__idx); \
+ __idx; \
+})
+
/* Iterate over initialised fw domains */
-#define for_each_fw_domain_masked(domain__, mask__, dev_priv__) \
- for ((domain__) = &(dev_priv__)->uncore.fw_domain[0]; \
- (domain__) < &(dev_priv__)->uncore.fw_domain[FW_DOMAIN_ID_COUNT]; \
- (domain__)++) \
- for_each_if ((mask__) & (domain__)->mask)
+#define for_each_fw_domain_masked(domain__, mask__, dev_priv__, tmp__) \
+ for (tmp__ = (mask__); \
+ tmp__ ? (domain__ = &(dev_priv__)->uncore.fw_domain[__mask_next_bit(tmp__)]), 1 : 0;)
-#define for_each_fw_domain(domain__, dev_priv__) \
- for_each_fw_domain_masked(domain__, FORCEWAKE_ALL, dev_priv__)
+#define for_each_fw_domain(domain__, dev_priv__, tmp__) \
+ for_each_fw_domain_masked(domain__, (dev_priv__)->uncore.fw_domains, dev_priv__, tmp__)
#define CSR_VERSION(major, minor) ((major) << 16 | (minor))
#define CSR_VERSION_MAJOR(version) ((version) >> 16)
@@ -2581,12 +2585,6 @@ static inline struct drm_i915_private *huc_to_i915(struct intel_huc *huc)
(id__)++) \
for_each_if ((engine__) = (dev_priv__)->engine[(id__)])
-#define __mask_next_bit(mask) ({ \
- int __idx = ffs(mask) - 1; \
- mask &= ~BIT(__idx); \
- __idx; \
-})
-
/* Iterator over subset of engines selected by mask */
#define for_each_engine_masked(engine__, dev_priv__, mask__, tmp__) \
for (tmp__ = mask__ & INTEL_INFO(dev_priv__)->ring_mask; \
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index aa2e7401efdc..2e79ca129202 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -118,13 +118,16 @@ static void
fw_domains_get(struct drm_i915_private *i915, enum forcewake_domains fw_domains)
{
struct intel_uncore_forcewake_domain *d;
+ unsigned int tmp;
+
+ GEM_BUG_ON(fw_domains & ~i915->uncore.fw_domains);
- for_each_fw_domain_masked(d, fw_domains, i915) {
+ for_each_fw_domain_masked(d, fw_domains, i915, tmp) {
fw_domain_wait_ack_clear(i915, d);
fw_domain_get(i915, d);
}
- for_each_fw_domain_masked(d, fw_domains, i915)
+ for_each_fw_domain_masked(d, fw_domains, i915, tmp)
fw_domain_wait_ack(i915, d);
i915->uncore.fw_domains_active |= fw_domains;
@@ -134,8 +137,11 @@ static void
fw_domains_put(struct drm_i915_private *i915, enum forcewake_domains fw_domains)
{
struct intel_uncore_forcewake_domain *d;
+ unsigned int tmp;
+
+ GEM_BUG_ON(fw_domains & ~i915->uncore.fw_domains);
- for_each_fw_domain_masked(d, fw_domains, i915) {
+ for_each_fw_domain_masked(d, fw_domains, i915, tmp) {
fw_domain_put(i915, d);
fw_domain_posting_read(i915, d);
}
@@ -147,9 +153,10 @@ static void
fw_domains_posting_read(struct drm_i915_private *i915)
{
struct intel_uncore_forcewake_domain *d;
+ unsigned int tmp;
/* No need to do for all, just do for first found */
- for_each_fw_domain(d, i915) {
+ for_each_fw_domain(d, i915, tmp) {
fw_domain_posting_read(i915, d);
break;
}
@@ -160,11 +167,14 @@ fw_domains_reset(struct drm_i915_private *i915,
enum forcewake_domains fw_domains)
{
struct intel_uncore_forcewake_domain *d;
+ unsigned int tmp;
- if (i915->uncore.fw_domains == 0)
+ if (!fw_domains)
return;
- for_each_fw_domain_masked(d, fw_domains, i915)
+ GEM_BUG_ON(fw_domains & ~i915->uncore.fw_domains);
+
+ for_each_fw_domain_masked(d, fw_domains, i915, tmp)
fw_domain_reset(i915, d);
fw_domains_posting_read(i915);
@@ -274,9 +284,11 @@ static void intel_uncore_forcewake_reset(struct drm_i915_private *dev_priv,
* timers are run before holding.
*/
while (1) {
+ unsigned int tmp;
+
active_domains = 0;
- for_each_fw_domain(domain, dev_priv) {
+ for_each_fw_domain(domain, dev_priv, tmp) {
if (hrtimer_cancel(&domain->timer) == 0)
continue;
@@ -285,7 +297,7 @@ static void intel_uncore_forcewake_reset(struct drm_i915_private *dev_priv,
spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
- for_each_fw_domain(domain, dev_priv) {
+ for_each_fw_domain(domain, dev_priv, tmp) {
if (hrtimer_active(&domain->timer))
active_domains |= domain->mask;
}
@@ -308,7 +320,7 @@ static void intel_uncore_forcewake_reset(struct drm_i915_private *dev_priv,
if (fw)
dev_priv->uncore.funcs.force_wake_put(dev_priv, fw);
- fw_domains_reset(dev_priv, FORCEWAKE_ALL);
+ fw_domains_reset(dev_priv, dev_priv->uncore.fw_domains);
if (restore) { /* If reset with a user forcewake, try to restore */
if (fw)
@@ -465,13 +477,13 @@ static void __intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
enum forcewake_domains fw_domains)
{
struct intel_uncore_forcewake_domain *domain;
+ unsigned int tmp;
fw_domains &= dev_priv->uncore.fw_domains;
- for_each_fw_domain_masked(domain, fw_domains, dev_priv) {
+ for_each_fw_domain_masked(domain, fw_domains, dev_priv, tmp)
if (domain->wake_count++)
fw_domains &= ~domain->mask;
- }
if (fw_domains)
dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_domains);
@@ -528,10 +540,11 @@ static void __intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
enum forcewake_domains fw_domains)
{
struct intel_uncore_forcewake_domain *domain;
+ unsigned int tmp;
fw_domains &= dev_priv->uncore.fw_domains;
- for_each_fw_domain_masked(domain, fw_domains, dev_priv) {
+ for_each_fw_domain_masked(domain, fw_domains, dev_priv, tmp) {
if (WARN_ON(domain->wake_count == 0))
continue;
@@ -936,8 +949,11 @@ static noinline void ___force_wake_auto(struct drm_i915_private *dev_priv,
enum forcewake_domains fw_domains)
{
struct intel_uncore_forcewake_domain *domain;
+ unsigned int tmp;
+
+ GEM_BUG_ON(fw_domains & ~dev_priv->uncore.fw_domains);
- for_each_fw_domain_masked(domain, fw_domains, dev_priv)
+ for_each_fw_domain_masked(domain, fw_domains, dev_priv, tmp)
fw_domain_arm_timer(domain);
dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_domains);
@@ -1175,7 +1191,7 @@ static void fw_domain_init(struct drm_i915_private *dev_priv,
BUILD_BUG_ON(FORCEWAKE_BLITTER != (1 << FW_DOMAIN_ID_BLITTER));
BUILD_BUG_ON(FORCEWAKE_MEDIA != (1 << FW_DOMAIN_ID_MEDIA));
- d->mask = 1 << domain_id;
+ d->mask = BIT(domain_id);
hrtimer_init(&d->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
d->timer.function = intel_uncore_fw_release_timer;
@@ -1253,9 +1269,9 @@ static void intel_uncore_fw_domains_init(struct drm_i915_private *dev_priv)
FORCEWAKE_MT, FORCEWAKE_MT_ACK);
spin_lock_irq(&dev_priv->uncore.lock);
- fw_domains_get_with_thread_status(dev_priv, FORCEWAKE_ALL);
+ fw_domains_get_with_thread_status(dev_priv, FORCEWAKE_RENDER);
ecobus = __raw_i915_read32(dev_priv, ECOBUS);
- fw_domains_put_with_fifo(dev_priv, FORCEWAKE_ALL);
+ fw_domains_put_with_fifo(dev_priv, FORCEWAKE_RENDER);
spin_unlock_irq(&dev_priv->uncore.lock);
if (!(ecobus & FORCEWAKE_MT_ENABLE)) {
--
2.11.0
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