drm/xe: Define IRQ offsets used by HW engines

When interrupts are delivered using memory based mechanism, engines
will write status to the report page at the offset (in bytes) that
corresponds to their interrupt bit from the GT_INTR_DW register.

Add engine interrupt offset definitions to engine info as we will
need this to process memory based interrupts.

Bspec: 46149, 50829, 50844
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20231214185955.1791-6-michal.wajdeczko@intel.comSigned-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>

drivers/gpu/drm/xe/xe_hw_engine.c

@@ -34,6 +34,7 @@ struct engine_info {
 	const char *name;
 	unsigned int class : 8;
 	unsigned int instance : 8;
+	unsigned int irq_offset : 8;
 	enum xe_force_wake_domains domain;
 	u32 mmio_base;
 };
@@ -43,6 +44,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "rcs0",
 		.class = XE_ENGINE_CLASS_RENDER,
 		.instance = 0,
+		.irq_offset = ilog2(INTR_RCS0),
 		.domain = XE_FW_RENDER,
 		.mmio_base = RENDER_RING_BASE,
 	},
@@ -50,6 +52,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "bcs0",
 		.class = XE_ENGINE_CLASS_COPY,
 		.instance = 0,
+		.irq_offset = ilog2(INTR_BCS(0)),
 		.domain = XE_FW_RENDER,
 		.mmio_base = BLT_RING_BASE,
 	},
@@ -57,6 +60,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "bcs1",
 		.class = XE_ENGINE_CLASS_COPY,
 		.instance = 1,
+		.irq_offset = ilog2(INTR_BCS(1)),
 		.domain = XE_FW_RENDER,
 		.mmio_base = XEHPC_BCS1_RING_BASE,
 	},
@@ -64,6 +68,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "bcs2",
 		.class = XE_ENGINE_CLASS_COPY,
 		.instance = 2,
+		.irq_offset = ilog2(INTR_BCS(2)),
 		.domain = XE_FW_RENDER,
 		.mmio_base = XEHPC_BCS2_RING_BASE,
 	},
@@ -71,6 +76,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "bcs3",
 		.class = XE_ENGINE_CLASS_COPY,
 		.instance = 3,
+		.irq_offset = ilog2(INTR_BCS(3)),
 		.domain = XE_FW_RENDER,
 		.mmio_base = XEHPC_BCS3_RING_BASE,
 	},
@@ -78,6 +84,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "bcs4",
 		.class = XE_ENGINE_CLASS_COPY,
 		.instance = 4,
+		.irq_offset = ilog2(INTR_BCS(4)),
 		.domain = XE_FW_RENDER,
 		.mmio_base = XEHPC_BCS4_RING_BASE,
 	},
@@ -85,6 +92,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "bcs5",
 		.class = XE_ENGINE_CLASS_COPY,
 		.instance = 5,
+		.irq_offset = ilog2(INTR_BCS(5)),
 		.domain = XE_FW_RENDER,
 		.mmio_base = XEHPC_BCS5_RING_BASE,
 	},
@@ -92,12 +100,14 @@ static const struct engine_info engine_infos[] = {
 		.name = "bcs6",
 		.class = XE_ENGINE_CLASS_COPY,
 		.instance = 6,
+		.irq_offset = ilog2(INTR_BCS(6)),
 		.domain = XE_FW_RENDER,
 		.mmio_base = XEHPC_BCS6_RING_BASE,
 	},
 	[XE_HW_ENGINE_BCS7] = {
 		.name = "bcs7",
 		.class = XE_ENGINE_CLASS_COPY,
+		.irq_offset = ilog2(INTR_BCS(7)),
 		.instance = 7,
 		.domain = XE_FW_RENDER,
 		.mmio_base = XEHPC_BCS7_RING_BASE,
@@ -106,6 +116,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "bcs8",
 		.class = XE_ENGINE_CLASS_COPY,
 		.instance = 8,
+		.irq_offset = ilog2(INTR_BCS8),
 		.domain = XE_FW_RENDER,
 		.mmio_base = XEHPC_BCS8_RING_BASE,
 	},
@@ -114,6 +125,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "vcs0",
 		.class = XE_ENGINE_CLASS_VIDEO_DECODE,
 		.instance = 0,
+		.irq_offset = 32 + ilog2(INTR_VCS(0)),
 		.domain = XE_FW_MEDIA_VDBOX0,
 		.mmio_base = BSD_RING_BASE,
 	},
@@ -121,6 +133,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "vcs1",
 		.class = XE_ENGINE_CLASS_VIDEO_DECODE,
 		.instance = 1,
+		.irq_offset = 32 + ilog2(INTR_VCS(1)),
 		.domain = XE_FW_MEDIA_VDBOX1,
 		.mmio_base = BSD2_RING_BASE,
 	},
@@ -128,6 +141,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "vcs2",
 		.class = XE_ENGINE_CLASS_VIDEO_DECODE,
 		.instance = 2,
+		.irq_offset = 32 + ilog2(INTR_VCS(2)),
 		.domain = XE_FW_MEDIA_VDBOX2,
 		.mmio_base = BSD3_RING_BASE,
 	},
@@ -135,6 +149,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "vcs3",
 		.class = XE_ENGINE_CLASS_VIDEO_DECODE,
 		.instance = 3,
+		.irq_offset = 32 + ilog2(INTR_VCS(3)),
 		.domain = XE_FW_MEDIA_VDBOX3,
 		.mmio_base = BSD4_RING_BASE,
 	},
@@ -142,6 +157,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "vcs4",
 		.class = XE_ENGINE_CLASS_VIDEO_DECODE,
 		.instance = 4,
+		.irq_offset = 32 + ilog2(INTR_VCS(4)),
 		.domain = XE_FW_MEDIA_VDBOX4,
 		.mmio_base = XEHP_BSD5_RING_BASE,
 	},
@@ -149,6 +165,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "vcs5",
 		.class = XE_ENGINE_CLASS_VIDEO_DECODE,
 		.instance = 5,
+		.irq_offset = 32 + ilog2(INTR_VCS(5)),
 		.domain = XE_FW_MEDIA_VDBOX5,
 		.mmio_base = XEHP_BSD6_RING_BASE,
 	},
@@ -156,6 +173,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "vcs6",
 		.class = XE_ENGINE_CLASS_VIDEO_DECODE,
 		.instance = 6,
+		.irq_offset = 32 + ilog2(INTR_VCS(6)),
 		.domain = XE_FW_MEDIA_VDBOX6,
 		.mmio_base = XEHP_BSD7_RING_BASE,
 	},
@@ -163,6 +181,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "vcs7",
 		.class = XE_ENGINE_CLASS_VIDEO_DECODE,
 		.instance = 7,
+		.irq_offset = 32 + ilog2(INTR_VCS(7)),
 		.domain = XE_FW_MEDIA_VDBOX7,
 		.mmio_base = XEHP_BSD8_RING_BASE,
 	},
@@ -170,6 +189,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "vecs0",
 		.class = XE_ENGINE_CLASS_VIDEO_ENHANCE,
 		.instance = 0,
+		.irq_offset = 32 + ilog2(INTR_VECS(0)),
 		.domain = XE_FW_MEDIA_VEBOX0,
 		.mmio_base = VEBOX_RING_BASE,
 	},
@@ -177,6 +197,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "vecs1",
 		.class = XE_ENGINE_CLASS_VIDEO_ENHANCE,
 		.instance = 1,
+		.irq_offset = 32 + ilog2(INTR_VECS(1)),
 		.domain = XE_FW_MEDIA_VEBOX1,
 		.mmio_base = VEBOX2_RING_BASE,
 	},
@@ -184,6 +205,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "vecs2",
 		.class = XE_ENGINE_CLASS_VIDEO_ENHANCE,
 		.instance = 2,
+		.irq_offset = 32 + ilog2(INTR_VECS(2)),
 		.domain = XE_FW_MEDIA_VEBOX2,
 		.mmio_base = XEHP_VEBOX3_RING_BASE,
 	},
@@ -191,6 +213,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "vecs3",
 		.class = XE_ENGINE_CLASS_VIDEO_ENHANCE,
 		.instance = 3,
+		.irq_offset = 32 + ilog2(INTR_VECS(3)),
 		.domain = XE_FW_MEDIA_VEBOX3,
 		.mmio_base = XEHP_VEBOX4_RING_BASE,
 	},
@@ -198,6 +221,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "ccs0",
 		.class = XE_ENGINE_CLASS_COMPUTE,
 		.instance = 0,
+		.irq_offset = ilog2(INTR_CCS(0)),
 		.domain = XE_FW_RENDER,
 		.mmio_base = COMPUTE0_RING_BASE,
 	},
@@ -205,6 +229,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "ccs1",
 		.class = XE_ENGINE_CLASS_COMPUTE,
 		.instance = 1,
+		.irq_offset = ilog2(INTR_CCS(1)),
 		.domain = XE_FW_RENDER,
 		.mmio_base = COMPUTE1_RING_BASE,
 	},
@@ -212,6 +237,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "ccs2",
 		.class = XE_ENGINE_CLASS_COMPUTE,
 		.instance = 2,
+		.irq_offset = ilog2(INTR_CCS(2)),
 		.domain = XE_FW_RENDER,
 		.mmio_base = COMPUTE2_RING_BASE,
 	},
@@ -219,6 +245,7 @@ static const struct engine_info engine_infos[] = {
 		.name = "ccs3",
 		.class = XE_ENGINE_CLASS_COMPUTE,
 		.instance = 3,
+		.irq_offset = ilog2(INTR_CCS(3)),
 		.domain = XE_FW_RENDER,
 		.mmio_base = COMPUTE3_RING_BASE,
 	},
@@ -397,6 +424,7 @@ static void hw_engine_init_early(struct xe_gt *gt, struct xe_hw_engine *hwe,
 	hwe->class = info->class;
 	hwe->instance = info->instance;
 	hwe->mmio_base = info->mmio_base;
+	hwe->irq_offset = info->irq_offset;
 	hwe->domain = info->domain;
 	hwe->name = info->name;
 	hwe->fence_irq = &gt->fence_irq[info->class];

drivers/gpu/drm/xe/xe_hw_engine_types.h

@@ -116,6 +116,8 @@ struct xe_hw_engine {
 	u16 instance;
 	/** @logical_instance: logical instance of this hw engine */
 	u16 logical_instance;
+	/** @irq_offset: IRQ offset of this hw engine */
+	u16 irq_offset;
 	/** @mmio_base: MMIO base address of this hw engine*/
 	u32 mmio_base;
 	/**