Add probe new added render node

Open the first available ivshm node.
If it is sancout buffer with certain resolution,
use the ivshm node to allocate buffer.

Tracked-On: OAM-122966
Signed-off-by: He, Yue <yue.he@intel.com>

cros_gralloc/cros_gralloc_driver.cc

@@ -27,6 +27,11 @@
 // DRM Card nodes start at 0
 #define DRM_CARD_NODE_START 0
 
+#define IVSH_WIDTH 1600
+#define IVSH_HEIGHT 900
+
+#define IVSH_DEVICE_NUM 2
+
 class cros_gralloc_driver_preloader
 {
       public:
@@ -109,6 +114,54 @@ cros_gralloc_driver *cros_gralloc_driver::get_instance()
         close(fd);                   \
     }
 
+int32_t cros_gralloc_driver::reload()
+{
+	int fd;
+	drmVersionPtr version;
+	char const *str = "%s/renderD%d";
+	char *node;
+
+	// Max probe two ivshm node, the first one is used for screen cast.
+	for (uint32_t i = drv_num_; i < drv_num_ + IVSH_DEVICE_NUM; i++) {
+		if (asprintf(&node, str, DRM_DIR_NAME, i) < 0)
+			continue;
+
+		fd = open(node, O_RDWR, 0);
+		free(node);
+		if (fd < 0)
+			continue;
+
+		version = drmGetVersion(fd);
+		if (!version) {
+			close(fd);
+			continue;
+		}
+
+		drmFreeVersion(version);
+		drv_ivshmem_ = drv_create(fd);
+		if (!drv_ivshmem_) {
+			drv_loge("Failed to create driver\n");
+			close(fd);
+			continue;;
+		}
+
+		if (drv_init(drv_ivshmem_, gpu_grp_type_)) {
+			drv_loge("Failed to init driver\n");
+			DRV_DESTROY(drv_ivshmem_)
+			continue;;
+		}
+		if (drv_virtgpu_is_ivshm(drv_ivshmem_)) {
+			drv_logi("New added node is virtio-ivishmem node");
+			return 0;
+		} else {
+			drv_logi("New added node is NOT virtio-ivishmem node");
+			DRV_DESTROY(drv_ivshmem_)
+			continue;
+		}
+	}
+	return -ENODEV;
+}
+
 cros_gralloc_driver::cros_gralloc_driver()
 {
 	/*
@@ -134,9 +187,9 @@ cros_gralloc_driver::cros_gralloc_driver()
 	char *node_name[render_num] = {};
 	int availabe_node = 0;
 	int virtio_node_idx = -1;
+	int ivshm_node_idx = -1;
 	int renderer_idx = -1;
 	int video_idx = -1;
-	uint32_t gpu_grp_type = 0;
 
 	char buf[PROP_VALUE_MAX];
 	property_get("ro.product.device", buf, "unknown");
@@ -149,6 +202,10 @@ cros_gralloc_driver::cros_gralloc_driver()
                 DRV_DESTROY(drv_kms_)
 	DRV_DESTROY(drv_render_)
 
+	if (drv_ivshmem_) {
+		DRV_DESTROY(drv_ivshmem_)
+	}
+
 	for (uint32_t i = min_render_node; i < max_render_node; i++) {
 		if (asprintf(&node, render_nodes_fmt, DRM_DIR_NAME, i) < 0)
 			continue;
@@ -177,7 +234,10 @@ cros_gralloc_driver::cros_gralloc_driver()
 			continue;
 
 		if (!strcmp(version->name, "virtio_gpu")) {
-			virtio_node_idx = availabe_node;
+			if (virtio_node_idx == -1)
+				virtio_node_idx = availabe_node;
+			else if (ivshm_node_idx == -1)
+				ivshm_node_idx = availabe_node;
 		}
 
 		if (!strcmp(version->name, "i915")) {
@@ -201,23 +261,11 @@ cros_gralloc_driver::cros_gralloc_driver()
 		drmFreeVersion(version);
 	}
 
-	if (availabe_node > 0) {
-		switch (availabe_node) {
-		// only have one render node, is GVT-d/BM/VirtIO
-		case 1:
-			gpu_grp_type = (virtio_node_idx != -1)? ONE_GPU_VIRTIO: ONE_GPU_INTEL;
-			break;
-		// is SR-IOV or iGPU + dGPU
-		case 2:
-			gpu_grp_type = (virtio_node_idx != -1)? TWO_GPU_IGPU_VIRTIO: TWO_GPU_IGPU_DGPU;
-			break;
-		// is SR-IOV + dGPU
-		case 3:
-			gpu_grp_type = THREE_GPU_IGPU_VIRTIO_DGPU;
-			// TO-DO: the 3rd node is i915 or others.
-			break;
-		}
+	drv_num_ = DRM_RENDER_NODE_START + availabe_node;
 
+	if (availabe_node > 0) {
+		if ((renderer_idx != -1) && (video_idx != -1) && (video_idx != renderer_idx))
+			gpu_grp_type_ |= GPU_TYPE_DUAL_IGPU_DGPU;
 		// if no i915 node found
 		if (renderer_idx == -1) {
 			if (virtio_node_idx != -1) {
@@ -262,31 +310,48 @@ cros_gralloc_driver::cros_gralloc_driver()
 			drv_kms_ = drv_render_;
 		}
 
+		if (ivshm_node_idx != -1) {
+			if (!(drv_ivshmem_ = drv_create(node_fd[ivshm_node_idx]))) {
+				drv_loge("Failed to create driver for the ivshm device with card id %d\n",
+					ivshm_node_idx);
+				close(node_fd[ivshm_node_idx]);
+			}
+		}
+
 		// Init drv
-		DRV_INIT(drv_render_, gpu_grp_type, renderer_idx)
+		DRV_INIT(drv_render_, gpu_grp_type_, renderer_idx)
 		if (video_idx != renderer_idx)
-			DRV_INIT(drv_video_, gpu_grp_type, video_idx)
+			DRV_INIT(drv_video_, gpu_grp_type_, video_idx)
 		if ((virtio_node_idx != -1) && (virtio_node_idx != renderer_idx))
-			DRV_INIT(drv_kms_, gpu_grp_type, virtio_node_idx)
-		if (drv_kms_ && (virtio_node_idx != renderer_idx)) {
+			DRV_INIT(drv_kms_, gpu_grp_type_, virtio_node_idx)
+		if (drv_kms_ && (virtio_node_idx != renderer_idx) && (drv_kms_ != drv_render_)) {
 			bool virtiopic_with_blob = drv_virtpci_with_blob(drv_kms_);
 			// The virtio pci device with blob feature could import buffers
 			// from i915, otherwise need use virtio to allocate scanout
 			// non-video buffers.
 			if (virtiopic_with_blob) {
-				drv_logi("virtio gpu device with blob\n");
+				drv_logi("Virtio gpu device with blob\n");
 				if ((drv_kms_ != drv_render_) && drv_kms_)
 					DRV_DESTROY(drv_kms_)
 				drv_kms_ = drv_render_;
 			} else {
-				drv_logi("virtio ivshmem device or no blob\n");
+				drv_logi("Virtio ivshmem device or no blob\n");
+			}
+		}
+		if (ivshm_node_idx != -1) {
+			DRV_INIT(drv_ivshmem_, gpu_grp_type_, ivshm_node_idx)
+			if (drv_virtgpu_is_ivshm(drv_ivshmem_)) {
+				drv_logi("Node is virtio-ivishmem node");
+			} else {
+				drv_logi("Node is NOT virtio-ivishmem node");
+				DRV_DESTROY(drv_ivshmem_)
 			}
 		}
 	}
 
 	for (int i = 0; i < availabe_node; i++) {
 		free(node_name[i]);
-		if ((i != renderer_idx) && (i != video_idx) && (i != virtio_node_idx)) {
+		if ((i != renderer_idx) && (i != video_idx) && (i != virtio_node_idx) && (i != ivshm_node_idx)) {
 			close(node_fd[i]);
 		}
 	}
@@ -322,6 +387,14 @@ bool cros_gralloc_driver::is_video_format(const struct cros_gralloc_buffer_descr
 	return true;
 }
 
+bool cros_gralloc_driver::use_ivshm_drv(const struct cros_gralloc_buffer_descriptor *descriptor)
+{
+	if ((descriptor->use_flags & BO_USE_SCANOUT) &&
+            (descriptor->width == IVSH_WIDTH) && (descriptor->height == IVSH_HEIGHT))
+		return true;
+        return false;
+}
+
 bool cros_gralloc_driver::get_resolved_format_and_use_flags(
     const struct cros_gralloc_buffer_descriptor *descriptor, uint32_t *out_format,
     uint64_t *out_use_flags)
@@ -331,7 +404,9 @@ bool cros_gralloc_driver::get_resolved_format_and_use_flags(
 	struct combination *combo;
 
 	struct driver *drv = is_video_format(descriptor) ? drv_video_ : drv_render_;
-	if ((descriptor->use_flags & BO_USE_SCANOUT) && !(is_video_format(descriptor)))
+	if (drv_ivshmem_ && use_ivshm_drv(descriptor)) {
+		drv = drv_ivshmem_;
+	} else if ((descriptor->use_flags & BO_USE_SCANOUT) && !(is_video_format(descriptor)))
 		drv = drv_kms_;
 
 	if (mt8183_camera_quirk_ && (descriptor->use_flags & BO_USE_CAMERA_READ) &&
@@ -377,7 +452,13 @@ bool cros_gralloc_driver::is_supported(const struct cros_gralloc_buffer_descript
 	uint32_t resolved_format;
 	uint64_t resolved_use_flags;
 	struct driver *drv = is_video_format(descriptor) ? drv_video_ : drv_render_;
-	if ((descriptor->use_flags & BO_USE_SCANOUT) && !(is_video_format(descriptor)))
+	if (!drv_ivshmem_ && (descriptor->width == IVSH_WIDTH) && (descriptor->height == IVSH_HEIGHT)) {
+		if (reload()) {
+		}
+	}
+	if (drv_ivshmem_ && use_ivshm_drv(descriptor)) {
+		drv = drv_ivshmem_;
+	} else if ((descriptor->use_flags & BO_USE_SCANOUT) && !(is_video_format(descriptor)))
 		drv = drv_kms_;
 	uint32_t max_texture_size = drv_get_max_texture_2d_size(drv);
 	if (!get_resolved_format_and_use_flags(descriptor, &resolved_format, &resolved_use_flags))
@@ -428,9 +509,10 @@ int32_t cros_gralloc_driver::allocate(const struct cros_gralloc_buffer_descripto
 	struct driver *drv;
 
 	drv = is_video_format(descriptor) ? drv_video_ : drv_render_;
-	if ((descriptor->use_flags & BO_USE_SCANOUT) && (!is_video_format(descriptor))) {
+	if (drv_ivshmem_ && use_ivshm_drv(descriptor)) {
+		drv = drv_ivshmem_;
+	} else if ((descriptor->use_flags & BO_USE_SCANOUT) && !(is_video_format(descriptor)))
 		drv = drv_kms_;
-	}
 
 	if (!get_resolved_format_and_use_flags(descriptor, &resolved_format, &resolved_use_flags)) {
 		ALOGE("Failed to resolve format and use_flags.");
@@ -585,7 +667,9 @@ int32_t cros_gralloc_driver::retain(buffer_handle_t handle)
 		.use_flags = hnd->use_flags,
 	};
 	drv = is_video_format(&descriptor) ? drv_video_ : drv_render_;
-	if ((hnd->use_flags & BO_USE_SCANOUT) && (!is_video_format(&descriptor)))
+	if (drv_ivshmem_ && use_ivshm_drv(&descriptor)) {
+		drv = drv_ivshmem_;
+	} else if ((hnd->use_flags & BO_USE_SCANOUT) && !(is_video_format(&descriptor)))
 		drv = drv_kms_;
 
 	auto hnd_it = handles_.find(hnd);

cros_gralloc/cros_gralloc_driver.h

@@ -8,6 +8,7 @@
 #define CROS_GRALLOC_DRIVER_H
 
 #include "cros_gralloc_buffer.h"
+#include "../drv_priv.h"
 
 #include <functional>
 #include <memory>
@@ -61,6 +62,8 @@ class cros_gralloc_driver
 	~cros_gralloc_driver();
 	bool is_initialized();
 	bool is_video_format(const struct cros_gralloc_buffer_descriptor *descriptor);
+	bool use_ivshm_drv(const struct cros_gralloc_buffer_descriptor *descriptor);
+	int32_t reload();
 	cros_gralloc_buffer *get_buffer(cros_gralloc_handle_t hnd);
 	bool
 	get_resolved_format_and_use_flags(const struct cros_gralloc_buffer_descriptor *descriptor,
@@ -90,6 +93,9 @@ class cros_gralloc_driver
 	struct driver *drv_video_ = nullptr;
 	// the drv_kms_ is used to allocate scanout non-video buffer.
 	struct driver *drv_kms_ = nullptr;
+	struct driver *drv_ivshmem_ = nullptr;
+	uint32_t drv_num_ = 0;
+	uint64_t gpu_grp_type_ = GPU_TYPE_NORMAL;
 	std::mutex mutex_;
 	std::unordered_map<uint32_t, std::unique_ptr<cros_gralloc_buffer>> buffers_;
 	std::unordered_map<cros_gralloc_handle_t, cros_gralloc_imported_handle_info> handles_;

drv.c

@@ -845,3 +845,15 @@ bool drv_virtpci_with_blob(struct driver * drv)
         }
         return ret;
 }
+
+bool drv_virtgpu_is_ivshm(struct driver * drv)
+{
+        bool ret = false;
+        assert(drv);
+        assert(drv->backend);
+
+        if (drv->backend->virtgpu_is_ivshm) {
+                ret = drv->backend->virtgpu_is_ivshm(drv);
+        }
+        return ret;
+}

drv.h

@@ -252,6 +252,8 @@ uint32_t drv_get_max_texture_2d_size(struct driver *drv);
 
 bool drv_virtpci_with_blob(struct driver * drv);
 
+bool drv_virtgpu_is_ivshm(struct driver * drv);
+
 enum drv_log_level {
 	DRV_LOGV,
 	DRV_LOGD,

drv_priv.h

@@ -60,21 +60,16 @@ struct combination {
 	uint64_t use_flags;
 };
 
-enum CIV_GPU_TYPE {
-	ONE_GPU_INTEL = 1,
-	ONE_GPU_VIRTIO,
-	TWO_GPU_IGPU_VIRTIO,
-	TWO_GPU_IGPU_DGPU,
-	THREE_GPU_IGPU_VIRTIO_DGPU
-};
+#define GPU_TYPE_NORMAL			0
+#define GPU_TYPE_DUAL_IGPU_DGPU		(1ull << 0)
 
 struct driver {
 	int fd;
 	const struct backend *backend;
 	void *priv;
 	pthread_mutex_t buffer_table_lock;
 	void *buffer_table;
-	uint32_t gpu_grp_type;  	// enum CIV_GPU_TYPE
+	uint64_t gpu_grp_type;
 	pthread_mutex_t mappings_lock;
 	struct drv_array *mappings;
 	struct drv_array *combos;
@@ -112,6 +107,7 @@ struct backend {
 			     uint32_t offsets[DRV_MAX_PLANES], uint64_t *format_modifier);
 	uint32_t (*get_max_texture_2d_size)(struct driver *drv);
 	bool (*virtpci_with_blob)(struct driver *drv);
+	bool (*virtgpu_is_ivshm)(struct driver *drv);
 };
 
 // clang-format off

i915.c

@@ -443,9 +443,7 @@ static int i915_add_combinations(struct driver *drv)
 
 	if (i915_has_tile4(i915)) {
 		// in dual gpu case, only alloc x-tiling for dgpu for render
-		if (((drv->gpu_grp_type == TWO_GPU_IGPU_DGPU) ||
-		    (drv->gpu_grp_type == THREE_GPU_IGPU_VIRTIO_DGPU))
-			&& (i915->graphics_version >= 125))
+		if ((drv->gpu_grp_type & GPU_TYPE_DUAL_IGPU_DGPU) && (i915->graphics_version >= 125))
 			return 0;
 
 		struct format_metadata metadata_4_tiled = { .tiling = I915_TILING_4,
@@ -476,8 +474,7 @@ static int i915_add_combinations(struct driver *drv)
 		struct format_metadata metadata_y_tiled = { .tiling = I915_TILING_Y,
 							    .priority = 3,
 							    .modifier = I915_FORMAT_MOD_Y_TILED };
-		if ((drv->gpu_grp_type == TWO_GPU_IGPU_DGPU) ||
-		    (drv->gpu_grp_type == THREE_GPU_IGPU_VIRTIO_DGPU)) {
+		if (drv->gpu_grp_type & GPU_TYPE_DUAL_IGPU_DGPU) {
 			scanout_and_render_not_linear = unset_flags(scanout_and_render, BO_USE_SCANOUT);
 		}
 /* Support y-tiled NV12 and P010 for libva */

virtgpu_virgl.c

@@ -1183,6 +1183,11 @@ static bool virgl_virtpci_with_blob(struct driver *drv) {
 	return ((prv->dev_feature & VIRTGPU_PARAM_QUERY_DEV_BIT ) && (prv->dev_feature & VIRTGPU_PARAM_RESOURCE_BLOB_BIT));
 }
 
+static bool virgl_drv_virtgpu_is_ivshm(struct driver *drv) {
+        struct virgl_priv *prv = (struct virgl_priv *)drv->priv;
+        return !(prv->dev_feature & VIRTGPU_PARAM_QUERY_DEV_BIT);
+}
+
 const struct backend virtgpu_virgl = { .name = "virtgpu_virgl",
 				       .init = virgl_init,
 				       .close = virgl_close,
@@ -1198,4 +1203,5 @@ const struct backend virtgpu_virgl = { .name = "virtgpu_virgl",
 					   virgl_resolve_format_and_use_flags,
 				       .resource_info = virgl_resource_info,
 				       .get_max_texture_2d_size = virgl_get_max_texture_2d_size,
-				       .virtpci_with_blob = virgl_virtpci_with_blob };
+				       .virtpci_with_blob = virgl_virtpci_with_blob,
+				       .virtgpu_is_ivshm = virgl_drv_virtgpu_is_ivshm };