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drm/i915: take a ref to the rpm in the uncore structure

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Remove a bit of pointer dancing in the reg access path.

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190325214940.23632-5-daniele.ceraolospurio@intel.com
This commit is contained in:
Daniele Ceraolo Spurio 2019-03-25 14:49:35 -07:00 committed by Chris Wilson
parent 2cf7bf6f2f
commit eb17af67eb
3 changed files with 23 additions and 12 deletions
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16
drivers/gpu/drm/i915/intel_drv.h
View File

@ -2269,18 +2269,24 @@ void icl_dbuf_slices_update(struct drm_i915_private *dev_priv,
u8 req_slices);
static inline void
assert_rpm_device_not_suspended(struct drm_i915_private *i915)
assert_rpm_device_not_suspended(struct i915_runtime_pm *rpm)
{
WARN_ONCE(i915->runtime_pm.suspended,
WARN_ONCE(rpm->suspended,
"Device suspended during HW access\n");
}
static inline void
__assert_rpm_wakelock_held(struct i915_runtime_pm *rpm)
{
assert_rpm_device_not_suspended(rpm);
WARN_ONCE(!atomic_read(&rpm->wakeref_count),
"RPM wakelock ref not held during HW access");
}
static inline void
assert_rpm_wakelock_held(struct drm_i915_private *i915)
{
assert_rpm_device_not_suspended(i915);
WARN_ONCE(!atomic_read(&i915->runtime_pm.wakeref_count),
"RPM wakelock ref not held during HW access");
__assert_rpm_wakelock_held(&i915->runtime_pm);
}
/**

16
drivers/gpu/drm/i915/intel_uncore.c
View File

@ -342,7 +342,7 @@ intel_uncore_fw_release_timer(struct hrtimer *timer)
struct intel_uncore *uncore = forcewake_domain_to_uncore(domain);
unsigned long irqflags;
assert_rpm_device_not_suspended(uncore_to_i915(uncore));
assert_rpm_device_not_suspended(uncore->rpm);
if (xchg(&domain->active, false))
return HRTIMER_RESTART;
@ -623,7 +623,7 @@ void intel_uncore_forcewake_get(struct intel_uncore *uncore,
if (!uncore->funcs.force_wake_get)
return;
assert_rpm_wakelock_held(uncore_to_i915(uncore));
__assert_rpm_wakelock_held(uncore->rpm);
spin_lock_irqsave(&uncore->lock, irqflags);
__intel_uncore_forcewake_get(uncore, fw_domains);
@ -777,7 +777,7 @@ void assert_forcewakes_active(struct intel_uncore *uncore,
if (!uncore->funcs.force_wake_get)
return;
assert_rpm_wakelock_held(uncore_to_i915(uncore));
__assert_rpm_wakelock_held(uncore->rpm);
fw_domains &= uncore->fw_domains;
WARN(fw_domains & ~uncore->fw_domains_active,
@ -1095,7 +1095,7 @@ unclaimed_reg_debug(struct intel_uncore *uncore,
#define GEN2_READ_HEADER(x) \
struct intel_uncore *uncore = &dev_priv->uncore; \
u##x val = 0; \
assert_rpm_wakelock_held(dev_priv);
__assert_rpm_wakelock_held(uncore->rpm);
#define GEN2_READ_FOOTER \
trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
@ -1138,7 +1138,7 @@ __gen2_read(64)
u32 offset = i915_mmio_reg_offset(reg); \
unsigned long irqflags; \
u##x val = 0; \
assert_rpm_wakelock_held(dev_priv); \
__assert_rpm_wakelock_held(uncore->rpm); \
spin_lock_irqsave(&uncore->lock, irqflags); \
unclaimed_reg_debug(uncore, reg, true, true)
@ -1213,7 +1213,7 @@ __gen6_read(64)
#define GEN2_WRITE_HEADER \
struct intel_uncore *uncore = &dev_priv->uncore; \
trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
assert_rpm_wakelock_held(dev_priv); \
__assert_rpm_wakelock_held(uncore->rpm); \
#define GEN2_WRITE_FOOTER
@ -1252,7 +1252,7 @@ __gen2_write(32)
u32 offset = i915_mmio_reg_offset(reg); \
unsigned long irqflags; \
trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
assert_rpm_wakelock_held(dev_priv); \
__assert_rpm_wakelock_held(uncore->rpm); \
spin_lock_irqsave(&uncore->lock, irqflags); \
unclaimed_reg_debug(uncore, reg, false, true)
@ -1596,6 +1596,8 @@ int intel_uncore_init(struct intel_uncore *uncore)
uncore->pmic_bus_access_nb.notifier_call =
i915_pmic_bus_access_notifier;
uncore->rpm = &i915->runtime_pm;
if (!intel_uncore_has_forcewake(uncore)) {
if (IS_GEN(i915, 5)) {
ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen5);

3
drivers/gpu/drm/i915/intel_uncore.h
View File

@ -32,6 +32,7 @@
#include "i915_reg.h"
struct drm_i915_private;
struct i915_runtime_pm;
struct intel_uncore;
enum forcewake_domain_id {
@ -95,6 +96,8 @@ struct intel_forcewake_range {
struct intel_uncore {
void __iomem *regs;
struct i915_runtime_pm *rpm;
spinlock_t lock; /** lock is also taken in irq contexts. */
unsigned int flags;