Refactor intel_engine_apply_whitelist into locked and unlocked versions
so that a caller who already has the lock can apply whitelist.
v2: Fix sparse warning
v3: (Chris)
- Drop prefix and suffix for static function
- Use longest to shortest line ordering for variable declaration
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx>
Reviewed-by: Chris Wilson <chris.p.wilson@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_workarounds.c | 44 +++++++++++++++------
1 file changed, 31 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index fed9503a7c4e..fa8c9d86847d 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -1337,7 +1337,8 @@ void intel_gt_init_workarounds(struct drm_i915_private *i915)
}
static enum forcewake_domains
-wal_get_fw_for_rmw(struct intel_uncore *uncore, const struct i915_wa_list *wal)
+wal_get_fw(struct intel_uncore *uncore, const struct i915_wa_list *wal,
+ unsigned int op)
{
enum forcewake_domains fw = 0;
struct i915_wa *wa;
@@ -1346,8 +1347,7 @@ wal_get_fw_for_rmw(struct intel_uncore *uncore, const struct i915_wa_list *wal)
for (i = 0, wa = wal->list; i < wal->count; i++, wa++)
fw |= intel_uncore_forcewake_for_reg(uncore,
wa->reg,
- FW_REG_READ |
- FW_REG_WRITE);
+ op);
return fw;
}
@@ -1377,7 +1377,7 @@ wa_list_apply(struct intel_uncore *uncore, const struct i915_wa_list *wal)
if (!wal->count)
return;
- fw = wal_get_fw_for_rmw(uncore, wal);
+ fw = wal_get_fw(uncore, wal, FW_REG_READ | FW_REG_WRITE);
spin_lock_irqsave(&uncore->lock, flags);
intel_uncore_forcewake_get__locked(uncore, fw);
@@ -1703,27 +1703,45 @@ void intel_engine_init_whitelist(struct intel_engine_cs *engine)
wa_init_finish(w);
}
-void intel_engine_apply_whitelist(struct intel_engine_cs *engine)
+static void __engine_apply_whitelist(struct intel_engine_cs *engine)
{
const struct i915_wa_list *wal = &engine->whitelist;
struct intel_uncore *uncore = engine->uncore;
const u32 base = engine->mmio_base;
+ enum forcewake_domains fw;
struct i915_wa *wa;
unsigned int i;
- if (!wal->count)
- return;
+ lockdep_assert_held(&uncore->lock);
+
+ fw = wal_get_fw(uncore, wal, FW_REG_WRITE);
+ intel_uncore_forcewake_get__locked(uncore, fw);
for (i = 0, wa = wal->list; i < wal->count; i++, wa++)
- intel_uncore_write(uncore,
- RING_FORCE_TO_NONPRIV(base, i),
- i915_mmio_reg_offset(wa->reg));
+ intel_uncore_write_fw(uncore,
+ RING_FORCE_TO_NONPRIV(base, i),
+ i915_mmio_reg_offset(wa->reg));
/* And clear the rest just in case of garbage */
for (; i < RING_MAX_NONPRIV_SLOTS; i++)
- intel_uncore_write(uncore,
- RING_FORCE_TO_NONPRIV(base, i),
- i915_mmio_reg_offset(RING_NOPID(base)));
+ intel_uncore_write_fw(uncore,
+ RING_FORCE_TO_NONPRIV(base, i),
+ i915_mmio_reg_offset(RING_NOPID(base)));
+
+ intel_uncore_forcewake_put__locked(uncore, fw);
+}
+
+void intel_engine_apply_whitelist(struct intel_engine_cs *engine)
+{
+ const struct i915_wa_list *wal = &engine->whitelist;
+ unsigned long flags;
+
+ if (!wal->count)
+ return;
+
+ spin_lock_irqsave(&engine->uncore->lock, flags);
+ __engine_apply_whitelist(engine);
+ spin_unlock_irqrestore(&engine->uncore->lock, flags);
}
static void
--
2.20.1
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