drm/xe/gsc: add Battlemage support

Add heci_cscfi support bit for new CSC engine type.
It has same mmio offsets as DG2 GSC but separate interrupt flow.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240708084906.2827024-1-alexander.usyskin@intel.com

drivers/gpu/drm/xe/xe_device_types.h

@@ -44,6 +44,7 @@ struct xe_pat_ops;
 #define MEDIA_VERx100(xe) ((xe)->info.media_verx100)
 #define IS_DGFX(xe) ((xe)->info.is_dgfx)
 #define HAS_HECI_GSCFI(xe) ((xe)->info.has_heci_gscfi)
+#define HAS_HECI_CSCFI(xe) ((xe)->info.has_heci_cscfi)
 
 #define XE_VRAM_FLAGS_NEED64K		BIT(0)
 
@@ -289,6 +290,8 @@ struct xe_device {
 		u8 skip_pcode:1;
 		/** @info.has_heci_gscfi: device has heci gscfi */
 		u8 has_heci_gscfi:1;
+		/** @info.has_heci_cscfi: device has heci cscfi */
+		u8 has_heci_cscfi:1;
 		/** @info.skip_guc_pc: Skip GuC based PM feature init */
 		u8 skip_guc_pc:1;
 		/** @info.has_atomic_enable_pte_bit: Device has atomic enable PTE bit */

drivers/gpu/drm/xe/xe_heci_gsc.c

@@ -92,7 +92,7 @@ void xe_heci_gsc_fini(struct xe_device *xe)
 {
 	struct xe_heci_gsc *heci_gsc = &xe->heci_gsc;
 
-	if (!HAS_HECI_GSCFI(xe))
+	if (!HAS_HECI_GSCFI(xe) && !HAS_HECI_CSCFI(xe))
 		return;
 
 	if (heci_gsc->adev) {
@@ -177,12 +177,14 @@ void xe_heci_gsc_init(struct xe_device *xe)
 	const struct heci_gsc_def *def;
 	int ret;
 
-	if (!HAS_HECI_GSCFI(xe))
+	if (!HAS_HECI_GSCFI(xe) && !HAS_HECI_CSCFI(xe))
 		return;
 
 	heci_gsc->irq = -1;
 
-	if (xe->info.platform == XE_PVC) {
+	if (xe->info.platform == XE_BATTLEMAGE) {
+		def = &heci_gsc_def_dg2;
+	} else if (xe->info.platform == XE_PVC) {
 		def = &heci_gsc_def_pvc;
 	} else if (xe->info.platform == XE_DG2) {
 		def = &heci_gsc_def_dg2;
@@ -232,3 +234,23 @@ void xe_heci_gsc_irq_handler(struct xe_device *xe, u32 iir)
 	if (ret)
 		drm_err_ratelimited(&xe->drm, "error handling GSC irq: %d\n", ret);
 }
+
+void xe_heci_csc_irq_handler(struct xe_device *xe, u32 iir)
+{
+	int ret;
+
+	if ((iir & CSC_IRQ_INTF(1)) == 0)
+		return;
+
+	if (!HAS_HECI_CSCFI(xe)) {
+		drm_warn_once(&xe->drm, "CSC irq: not supported");
+		return;
+	}
+
+	if (xe->heci_gsc.irq < 0)
+		return;
+
+	ret = generic_handle_irq(xe->heci_gsc.irq);
+	if (ret)
+		drm_err_ratelimited(&xe->drm, "error handling GSC irq: %d\n", ret);
+}

drivers/gpu/drm/xe/xe_heci_gsc.h

@@ -11,10 +11,15 @@ struct xe_device;
 struct mei_aux_device;
 
 /*
- * The HECI1 bit corresponds to bit15 and HECI2 to bit14.
+ * GSC HECI1 bit corresponds to bit15 and HECI2 to bit14.
  * The reason for this is to allow growth for more interfaces in the future.
  */
-#define GSC_IRQ_INTF(_x)  BIT(15 - (_x))
+#define GSC_IRQ_INTF(_x) BIT(15 - (_x))
+
+/*
+ * CSC HECI1 bit corresponds to bit9 and HECI2 to bit10.
+ */
+#define CSC_IRQ_INTF(_x) BIT(9 + (_x))
 
 /**
  * struct xe_heci_gsc - graphics security controller for xe, HECI interface
@@ -31,5 +36,6 @@ struct xe_heci_gsc {
 void xe_heci_gsc_init(struct xe_device *xe);
 void xe_heci_gsc_fini(struct xe_device *xe);
 void xe_heci_gsc_irq_handler(struct xe_device *xe, u32 iir);
+void xe_heci_csc_irq_handler(struct xe_device *xe, u32 iir);
 
 #endif /* __XE_HECI_GSC_DEV_H__ */

drivers/gpu/drm/xe/xe_irq.c

@@ -459,6 +459,8 @@ static irqreturn_t dg1_irq_handler(int irq, void *arg)
 		 * the primary tile.
 		 */
 		if (id == 0) {
+			if (HAS_HECI_CSCFI(xe))
+				xe_heci_csc_irq_handler(xe, master_ctl);
 			xe_display_irq_handler(xe, master_ctl);
 			gu_misc_iir = gu_misc_irq_ack(xe, master_ctl);
 		}

drivers/gpu/drm/xe/xe_pci.c

@@ -59,6 +59,7 @@ struct xe_device_desc {
 
 	u8 has_display:1;
 	u8 has_heci_gscfi:1;
+	u8 has_heci_cscfi:1;
 	u8 has_llc:1;
 	u8 has_mmio_ext:1;
 	u8 has_sriov:1;
@@ -345,6 +346,7 @@ static const struct xe_device_desc bmg_desc = {
 	PLATFORM(BATTLEMAGE),
 	.has_display = true,
 	.require_force_probe = true,
+	.has_heci_cscfi = 1,
 };
 
 #undef PLATFORM
@@ -606,6 +608,7 @@ static int xe_info_init_early(struct xe_device *xe,
 
 	xe->info.is_dgfx = desc->is_dgfx;
 	xe->info.has_heci_gscfi = desc->has_heci_gscfi;
+	xe->info.has_heci_cscfi = desc->has_heci_cscfi;
 	xe->info.has_llc = desc->has_llc;
 	xe->info.has_mmio_ext = desc->has_mmio_ext;
 	xe->info.has_sriov = desc->has_sriov;
@@ -815,7 +818,7 @@ static int xe_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (err)
 		return err;
 
-	drm_dbg(&xe->drm, "%s %s %04x:%04x dgfx:%d gfx:%s (%d.%02d) media:%s (%d.%02d) display:%s dma_m_s:%d tc:%d gscfi:%d",
+	drm_dbg(&xe->drm, "%s %s %04x:%04x dgfx:%d gfx:%s (%d.%02d) media:%s (%d.%02d) display:%s dma_m_s:%d tc:%d gscfi:%d cscfi:%d",
 		desc->platform_name,
 		subplatform_desc ? subplatform_desc->name : "",
 		xe->info.devid, xe->info.revid,
@@ -828,7 +831,7 @@ static int xe_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		xe->info.media_verx100 % 100,
 		str_yes_no(xe->info.enable_display),
 		xe->info.dma_mask_size, xe->info.tile_count,
-		xe->info.has_heci_gscfi);
+		xe->info.has_heci_gscfi, xe->info.has_heci_cscfi);
 
 	drm_dbg(&xe->drm, "Stepping = (G:%s, M:%s, D:%s, B:%s)\n",
 		xe_step_name(xe->info.step.graphics),