drm/xe/irq: Split irq mask per engine class

Each engine class has a different bitfield structure in the hw. We've
been just using a common mask for all of them, but this means that we
could inadvertently set a wrong bit in one class while enabling
something in another. Split them to make it more future proof.

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20251016-xe3p-v3-18-3dd173a3097a@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

1 files changed, 47 insertions, 26 deletions

diff --git a/drivers/gpu/drm/xe/xe_irq.c b/drivers/gpu/drm/xe/xe_irq.c
index 9c3a85c4585e..142f422a5d97 100644
--- a/drivers/gpu/drm/xe/xe_irq.c
+++ b/drivers/gpu/drm/xe/xe_irq.c
@@ -139,25 +139,28 @@ void xe_irq_enable_hwe(struct xe_gt *gt)
 {
 	struct xe_device *xe = gt_to_xe(gt);
 	struct xe_mmio *mmio = &gt->mmio;
-	u32 irqs, dmask, smask;
-	u32 gsc_mask = 0;
-	u32 heci_mask = 0;
+	u32 common_mask, val, gsc_mask = 0, heci_mask = 0,
+	    rcs_mask = 0, bcs_mask = 0, vcs_mask = 0, vecs_mask = 0,
+	    ccs_mask = 0;
 
 	if (xe_device_uses_memirq(xe))
 		return;
 
 	if (xe_device_uc_enabled(xe)) {
-		irqs = GT_RENDER_USER_INTERRUPT |
-			GT_RENDER_PIPECTL_NOTIFY_INTERRUPT;
+		common_mask = GT_RENDER_USER_INTERRUPT |
+			      GT_RENDER_PIPECTL_NOTIFY_INTERRUPT;
 	} else {
-		irqs = GT_RENDER_USER_INTERRUPT |
-		       GT_CS_MASTER_ERROR_INTERRUPT |
-		       GT_CONTEXT_SWITCH_INTERRUPT |
-		       GT_WAIT_SEMAPHORE_INTERRUPT;
+		common_mask = GT_RENDER_USER_INTERRUPT |
+			      GT_CS_MASTER_ERROR_INTERRUPT |
+			      GT_CONTEXT_SWITCH_INTERRUPT |
+			      GT_WAIT_SEMAPHORE_INTERRUPT;
 	}
 
-	dmask = irqs << 16 | irqs;
-	smask = irqs << 16;
+	rcs_mask |= common_mask;
+	bcs_mask |= common_mask;
+	vcs_mask |= common_mask;
+	vecs_mask |= common_mask;
+	ccs_mask |= common_mask;
 
 	if (xe_gt_is_main_type(gt)) {
 		/*
@@ -169,44 +172,62 @@ void xe_irq_enable_hwe(struct xe_gt *gt)
 		u32 bcs_fuse_mask = xe_hw_engine_mask_per_class(gt, XE_ENGINE_CLASS_COPY);
 
 		/* Enable interrupts for each engine class */
-		xe_mmio_write32(mmio, RENDER_COPY_INTR_ENABLE, dmask);
+		xe_mmio_write32(mmio, RENDER_COPY_INTR_ENABLE,
+				REG_FIELD_PREP(ENGINE1_MASK, rcs_mask) |
+				REG_FIELD_PREP(ENGINE0_MASK, bcs_mask));
 		if (ccs_fuse_mask)
-			xe_mmio_write32(mmio, CCS_RSVD_INTR_ENABLE, smask);
+			xe_mmio_write32(mmio, CCS_RSVD_INTR_ENABLE,
+					REG_FIELD_PREP(ENGINE1_MASK, ccs_mask));
 
 		/* Unmask interrupts for each engine instance */
-		xe_mmio_write32(mmio, RCS0_RSVD_INTR_MASK, ~smask);
-		xe_mmio_write32(mmio, BCS_RSVD_INTR_MASK, ~smask);
+		val = ~REG_FIELD_PREP(ENGINE1_MASK, rcs_mask);
+		xe_mmio_write32(mmio, RCS0_RSVD_INTR_MASK, val);
+		val = ~REG_FIELD_PREP(ENGINE1_MASK, bcs_mask);
+		xe_mmio_write32(mmio, BCS_RSVD_INTR_MASK, val);
+
+		val = ~(REG_FIELD_PREP(ENGINE1_MASK, bcs_mask) |
+			REG_FIELD_PREP(ENGINE0_MASK, bcs_mask));
 		if (bcs_fuse_mask & (BIT(1)|BIT(2)))
-			xe_mmio_write32(mmio, XEHPC_BCS1_BCS2_INTR_MASK, ~dmask);
+			xe_mmio_write32(mmio, XEHPC_BCS1_BCS2_INTR_MASK, val);
 		if (bcs_fuse_mask & (BIT(3)|BIT(4)))
-			xe_mmio_write32(mmio, XEHPC_BCS3_BCS4_INTR_MASK, ~dmask);
+			xe_mmio_write32(mmio, XEHPC_BCS3_BCS4_INTR_MASK, val);
 		if (bcs_fuse_mask & (BIT(5)|BIT(6)))
-			xe_mmio_write32(mmio, XEHPC_BCS5_BCS6_INTR_MASK, ~dmask);
+			xe_mmio_write32(mmio, XEHPC_BCS5_BCS6_INTR_MASK, val);
 		if (bcs_fuse_mask & (BIT(7)|BIT(8)))
-			xe_mmio_write32(mmio, XEHPC_BCS7_BCS8_INTR_MASK, ~dmask);
+			xe_mmio_write32(mmio, XEHPC_BCS7_BCS8_INTR_MASK, val);
+
+		val = ~(REG_FIELD_PREP(ENGINE1_MASK, ccs_mask) |
+			REG_FIELD_PREP(ENGINE0_MASK, ccs_mask));
 		if (ccs_fuse_mask & (BIT(0)|BIT(1)))
-			xe_mmio_write32(mmio, CCS0_CCS1_INTR_MASK, ~dmask);
+			xe_mmio_write32(mmio, CCS0_CCS1_INTR_MASK, val);
 		if (ccs_fuse_mask & (BIT(2)|BIT(3)))
-			xe_mmio_write32(mmio, CCS2_CCS3_INTR_MASK, ~dmask);
+			xe_mmio_write32(mmio, CCS2_CCS3_INTR_MASK, val);
 	}
 
 	if (xe_gt_is_media_type(gt) || MEDIA_VER(xe) < 13) {
 		u32 other_fuse_mask = xe_hw_engine_mask_per_class(gt, XE_ENGINE_CLASS_OTHER);
 
 		/* Enable interrupts for each engine class */
-		xe_mmio_write32(mmio, VCS_VECS_INTR_ENABLE, dmask);
+		xe_mmio_write32(mmio, VCS_VECS_INTR_ENABLE,
+				REG_FIELD_PREP(ENGINE1_MASK, vcs_mask) |
+				REG_FIELD_PREP(ENGINE0_MASK, vecs_mask));
 
 		/* Unmask interrupts for each engine instance */
-		xe_mmio_write32(mmio, VCS0_VCS1_INTR_MASK, ~dmask);
-		xe_mmio_write32(mmio, VCS2_VCS3_INTR_MASK, ~dmask);
-		xe_mmio_write32(mmio, VECS0_VECS1_INTR_MASK, ~dmask);
+		val = ~(REG_FIELD_PREP(ENGINE1_MASK, vcs_mask) |
+			REG_FIELD_PREP(ENGINE0_MASK, vcs_mask));
+		xe_mmio_write32(mmio, VCS0_VCS1_INTR_MASK, val);
+		xe_mmio_write32(mmio, VCS2_VCS3_INTR_MASK, val);
+
+		val = ~(REG_FIELD_PREP(ENGINE1_MASK, vecs_mask) |
+			REG_FIELD_PREP(ENGINE0_MASK, vecs_mask));
+		xe_mmio_write32(mmio, VECS0_VECS1_INTR_MASK, val);
 
 		/*
 		 * the heci2 interrupt is enabled via the same register as the
 		 * GSCCS interrupts, but it has its own mask register.
 		 */
 		if (other_fuse_mask) {
-			gsc_mask = irqs | GSC_ER_COMPLETE;
+			gsc_mask = common_mask | GSC_ER_COMPLETE;
 			heci_mask = GSC_IRQ_INTF(1);
 		} else if (xe->info.has_heci_gscfi) {
 			gsc_mask = GSC_IRQ_INTF(1);