[5/7] drm/i915/gt: Refactor _wa_add to reuse wa_index and wa_list_grow

Commit Message

Umesh Nerlige Ramappa Nov. 13, 2020, 6:03 p.m. UTC

Switch the search and grow code of the _wa_add to use _wa_index and
_wa_list_grow.

Signed-off-by: Umesh Nerlige Ramappa <[e-mail]>
---
 drivers/gpu/drm/i915/gt/intel_workarounds.c | 54 +++++++--------------
 1 file changed, 17 insertions(+), 37 deletions(-)

Patch

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 722f11e43dad..b79a08868fa7 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -190,53 +190,33 @@  static void _wa_remove(struct i915_wa_list *wal, i915_reg_t reg, u32 flags)
 
 static void _wa_add(struct i915_wa_list *wal, const struct i915_wa *wa)
 {
-	unsigned int addr = i915_mmio_reg_offset(wa->reg);
-	unsigned int start = 0, end = wal->count;
+	int index;
 	const unsigned int grow = WA_LIST_CHUNK;
 	struct i915_wa *wa_;
 
 	GEM_BUG_ON(!is_power_of_2(grow));
 
-	if (IS_ALIGNED(wal->count, grow)) { /* Either uninitialized or full. */
-		struct i915_wa *list;
-
-		list = kmalloc_array(ALIGN(wal->count + 1, grow), sizeof(*wa),
-				     GFP_KERNEL);
-		if (!list) {
-			DRM_ERROR("No space for workaround init!\n");
+	if (IS_ALIGNED(wal->count, grow)) /* Either uninitialized or full. */
+		if (_wa_list_grow(wal, wal->count) < 0)
 			return;
-		}
-
-		if (wal->list)
-			memcpy(list, wal->list, sizeof(*wa) * wal->count);
 
-		wal->list = list;
-	}
+	index = _wa_index(wal, wa->reg);
+	if (index >= 0) {
+		wa_ = &wal->list[index];
 
-	while (start < end) {
-		unsigned int mid = start + (end - start) / 2;
+		if ((wa->clr | wa_->clr) && !(wa->clr & ~wa_->clr)) {
+			DRM_ERROR("Discarding overwritten w/a for reg %04x (clear: %08x, set: %08x)\n",
+				  i915_mmio_reg_offset(wa_->reg),
+				  wa_->clr, wa_->set);
 
-		if (i915_mmio_reg_offset(wal->list[mid].reg) < addr) {
-			start = mid + 1;
-		} else if (i915_mmio_reg_offset(wal->list[mid].reg) > addr) {
-			end = mid;
-		} else {
-			wa_ = &wal->list[mid];
-
-			if ((wa->clr | wa_->clr) && !(wa->clr & ~wa_->clr)) {
-				DRM_ERROR("Discarding overwritten w/a for reg %04x (clear: %08x, set: %08x)\n",
-					  i915_mmio_reg_offset(wa_->reg),
-					  wa_->clr, wa_->set);
-
-				wa_->set &= ~wa->clr;
-			}
-
-			wal->wa_count++;
-			wa_->set |= wa->set;
-			wa_->clr |= wa->clr;
-			wa_->read |= wa->read;
-			return;
+			wa_->set &= ~wa->clr;
 		}
+
+		wal->wa_count++;
+		wa_->set |= wa->set;
+		wa_->clr |= wa->clr;
+		wa_->read |= wa->read;
+		return;
 	}
 
 	wal->wa_count++;