1 files changed, 96 insertions, 10 deletions

diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
index 0e494028b81d..7af6db3194dd 100644
--- a/drivers/gpu/drm/i915/gt/intel_gsc.c
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
@@ -7,6 +7,7 @@
 #include <linux/mei_aux.h>
 #include "i915_drv.h"
 #include "i915_reg.h"
+#include "gem/i915_gem_region.h"
 #include "gt/intel_gsc.h"
 #include "gt/intel_gt.h"
 
@@ -36,10 +37,56 @@ static int gsc_irq_init(int irq)
 	return irq_set_chip_data(irq, NULL);
 }
 
+static int
+gsc_ext_om_alloc(struct intel_gsc *gsc, struct intel_gsc_intf *intf, size_t size)
+{
+	struct intel_gt *gt = gsc_to_gt(gsc);
+	struct drm_i915_gem_object *obj;
+	int err;
+
+	obj = i915_gem_object_create_lmem(gt->i915, size,
+					  I915_BO_ALLOC_CONTIGUOUS |
+					  I915_BO_ALLOC_CPU_CLEAR);
+	if (IS_ERR(obj)) {
+		drm_err(&gt->i915->drm, "Failed to allocate gsc memory\n");
+		return PTR_ERR(obj);
+	}
+
+	err = i915_gem_object_pin_pages_unlocked(obj);
+	if (err) {
+		drm_err(&gt->i915->drm, "Failed to pin pages for gsc memory\n");
+		goto out_put;
+	}
+
+	intf->gem_obj = obj;
+
+	return 0;
+
+out_put:
+	i915_gem_object_put(obj);
+	return err;
+}
+
+static void gsc_ext_om_destroy(struct intel_gsc_intf *intf)
+{
+	struct drm_i915_gem_object *obj = fetch_and_zero(&intf->gem_obj);
+
+	if (!obj)
+		return;
+
+	if (i915_gem_object_has_pinned_pages(obj))
+		i915_gem_object_unpin_pages(obj);
+
+	i915_gem_object_put(obj);
+}
+
 struct gsc_def {
 	const char *name;
 	unsigned long bar;
 	size_t bar_size;
+	bool use_polling;
+	bool slow_firmware;
+	size_t lmem_size;
 };
 
 /* gsc resources and definitions (HECI1 and HECI2) */
@@ -54,11 +101,25 @@ static const struct gsc_def gsc_def_dg1[] = {
 	}
 };
 
+static const struct gsc_def gsc_def_xehpsdv[] = {
+	{
+		/* HECI1 not enabled on the device. */
+	},
+	{
+		.name = "mei-gscfi",
+		.bar = DG1_GSC_HECI2_BASE,
+		.bar_size = GSC_BAR_LENGTH,
+		.use_polling = true,
+		.slow_firmware = true,
+	}
+};
+
 static const struct gsc_def gsc_def_dg2[] = {
 	{
 		.name = "mei-gsc",
 		.bar = DG2_GSC_HECI1_BASE,
 		.bar_size = GSC_BAR_LENGTH,
+		.lmem_size = SZ_4M,
 	},
 	{
 		.name = "mei-gscfi",
@@ -75,26 +136,32 @@ static void gsc_release_dev(struct device *dev)
 	kfree(adev);
 }
 
-static void gsc_destroy_one(struct intel_gsc_intf *intf)
+static void gsc_destroy_one(struct drm_i915_private *i915,
+			    struct intel_gsc *gsc, unsigned int intf_id)
 {
+	struct intel_gsc_intf *intf = &gsc->intf[intf_id];
+
 	if (intf->adev) {
 		auxiliary_device_delete(&intf->adev->aux_dev);
 		auxiliary_device_uninit(&intf->adev->aux_dev);
 		intf->adev = NULL;
 	}
+
 	if (intf->irq >= 0)
 		irq_free_desc(intf->irq);
 	intf->irq = -1;
+
+	gsc_ext_om_destroy(intf);
 }
 
-static void gsc_init_one(struct drm_i915_private *i915,
-			 struct intel_gsc_intf *intf,
+static void gsc_init_one(struct drm_i915_private *i915, struct intel_gsc *gsc,
 			 unsigned int intf_id)
 {
 	struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
 	struct mei_aux_device *adev;
 	struct auxiliary_device *aux_dev;
 	const struct gsc_def *def;
+	struct intel_gsc_intf *intf = &gsc->intf[intf_id];
 	int ret;
 
 	intf->irq = -1;
@@ -105,6 +172,8 @@ static void gsc_init_one(struct drm_i915_private *i915,
 
 	if (IS_DG1(i915)) {
 		def = &gsc_def_dg1[intf_id];
+	} else if (IS_XEHPSDV(i915)) {
+		def = &gsc_def_xehpsdv[intf_id];
 	} else if (IS_DG2(i915)) {
 		def = &gsc_def_dg2[intf_id];
 	} else {
@@ -117,10 +186,14 @@ static void gsc_init_one(struct drm_i915_private *i915,
 		return;
 	}
 
+	/* skip irq initialization */
+	if (def->use_polling)
+		goto add_device;
+
 	intf->irq = irq_alloc_desc(0);
 	if (intf->irq < 0) {
 		drm_err(&i915->drm, "gsc irq error %d\n", intf->irq);
-		return;
+		goto fail;
 	}
 
 	ret = gsc_irq_init(intf->irq);
@@ -129,16 +202,31 @@ static void gsc_init_one(struct drm_i915_private *i915,
 		goto fail;
 	}
 
+add_device:
 	adev = kzalloc(sizeof(*adev), GFP_KERNEL);
 	if (!adev)
 		goto fail;
 
+	if (def->lmem_size) {
+		drm_dbg(&i915->drm, "setting up GSC lmem\n");
+
+		if (gsc_ext_om_alloc(gsc, intf, def->lmem_size)) {
+			drm_err(&i915->drm, "setting up gsc extended operational memory failed\n");
+			kfree(adev);
+			goto fail;
+		}
+
+		adev->ext_op_mem.start = i915_gem_object_get_dma_address(intf->gem_obj, 0);
+		adev->ext_op_mem.end = adev->ext_op_mem.start + def->lmem_size;
+	}
+
 	adev->irq = intf->irq;
 	adev->bar.parent = &pdev->resource[0];
 	adev->bar.start = def->bar + pdev->resource[0].start;
 	adev->bar.end = adev->bar.start + def->bar_size - 1;
 	adev->bar.flags = IORESOURCE_MEM;
 	adev->bar.desc = IORES_DESC_NONE;
+	adev->slow_firmware = def->slow_firmware;
 
 	aux_dev = &adev->aux_dev;
 	aux_dev->name = def->name;
@@ -165,7 +253,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
 
 	return;
 fail:
-	gsc_destroy_one(intf);
+	gsc_destroy_one(i915, gsc, intf->id);
 }
 
 static void gsc_irq_handler(struct intel_gt *gt, unsigned int intf_id)
@@ -182,10 +270,8 @@ static void gsc_irq_handler(struct intel_gt *gt, unsigned int intf_id)
 		return;
 	}
 
-	if (gt->gsc.intf[intf_id].irq < 0) {
-		drm_err_ratelimited(&gt->i915->drm, "GSC irq: irq not set");
+	if (gt->gsc.intf[intf_id].irq < 0)
 		return;
-	}
 
 	ret = generic_handle_irq(gt->gsc.intf[intf_id].irq);
 	if (ret)
@@ -208,7 +294,7 @@ void intel_gsc_init(struct intel_gsc *gsc, struct drm_i915_private *i915)
 		return;
 
 	for (i = 0; i < INTEL_GSC_NUM_INTERFACES; i++)
-		gsc_init_one(i915, &gsc->intf[i], i);
+		gsc_init_one(i915, gsc, i);
 }
 
 void intel_gsc_fini(struct intel_gsc *gsc)
@@ -220,5 +306,5 @@ void intel_gsc_fini(struct intel_gsc *gsc)
 		return;
 
 	for (i = 0; i < INTEL_GSC_NUM_INTERFACES; i++)
-		gsc_destroy_one(&gsc->intf[i]);
+		gsc_destroy_one(gt->i915, gsc, i);
 }