IPC support in L0 provider

Author: vinser52

src/provider/provider_level_zero.c

@@ -10,6 +10,7 @@
 #include <pthread.h>
 #include <stdbool.h>
 #include <stddef.h>
+#include <string.h>
 #include <unistd.h>
 
 // Level Zero API
@@ -42,6 +43,13 @@ typedef struct ze_ops_t {
                                     const ze_host_mem_alloc_desc_t *, size_t,
                                     size_t, ze_device_handle_t, void *);
     ze_result_t (*zeMemFree)(ze_context_handle_t, void *);
+    ze_result_t (*zeMemGetIpcHandle)(ze_context_handle_t, const void *,
+                                     ze_ipc_mem_handle_t *);
+    ze_result_t (*zeMemPutIpcHandle)(ze_context_handle_t, ze_ipc_mem_handle_t);
+    ze_result_t (*zeMemOpenIpcHandle)(ze_context_handle_t, ze_device_handle_t,
+                                      ze_ipc_mem_handle_t,
+                                      ze_ipc_memory_flags_t, void **);
+    ze_result_t (*zeMemCloseIpcHandle)(ze_context_handle_t, void *);
 } ze_ops_t;
 
 static ze_ops_t g_ze_ops;
@@ -55,9 +63,17 @@ static void init_ze_global_state(void) {
     *(void **)&g_ze_ops.zeMemAllocDevice = dlsym(0, "zeMemAllocDevice");
     *(void **)&g_ze_ops.zeMemAllocShared = dlsym(0, "zeMemAllocShared");
     *(void **)&g_ze_ops.zeMemFree = dlsym(0, "zeMemFree");
+    *(void **)&g_ze_ops.zeMemGetIpcHandle = dlsym(0, "zeMemGetIpcHandle");
+    *(void **)&g_ze_ops.zeMemPutIpcHandle = dlsym(0, "zeMemPutIpcHandle");
+    *(void **)&g_ze_ops.zeMemOpenIpcHandle = dlsym(0, "zeMemOpenIpcHandle");
+    *(void **)&g_ze_ops.zeMemCloseIpcHandle = dlsym(0, "zeMemCloseIpcHandle");
 
     if (!g_ze_ops.zeMemAllocHost || !g_ze_ops.zeMemAllocDevice ||
-        !g_ze_ops.zeMemAllocShared || !g_ze_ops.zeMemFree) {
+        !g_ze_ops.zeMemAllocShared || !g_ze_ops.zeMemFree ||
+        !g_ze_ops.zeMemGetIpcHandle || !g_ze_ops.zeMemOpenIpcHandle ||
+        !g_ze_ops.zeMemCloseIpcHandle) {
+        // g_ze_ops.zeMemPutIpcHandle can be NULL because it was introduced
+        // starting from Level Zero 1.6
         fprintf(stderr, "Required Level Zero symbols not found.\n");
         Init_ze_global_state_failed = true;
     }
@@ -254,6 +270,101 @@ static umf_result_t ze_memory_provider_allocation_split(void *provider,
     return UMF_RESULT_ERROR_NOT_SUPPORTED;
 }
 
+struct ipc_data_t {
+    ze_ipc_mem_handle_t ze_ipc_handle;
+    ze_memory_type_t memory_type;
+    //TODO: do we need size?
+    size_t size;
+};
+
+static umf_result_t ze_memory_provider_get_ipc_handle_size(void *provider,
+                                                           size_t *size) {
+    (void)provider;
+    *size = sizeof(struct ipc_data_t);
+    return UMF_RESULT_SUCCESS;
+}
+
+static umf_result_t ze_memory_provider_get_ipc_handle(void *provider,
+                                                      const void *ptr,
+                                                      size_t size,
+                                                      void *ipcData) {
+    ze_result_t ze_result;
+    ze_ipc_mem_handle_t ze_ipc_handle = {0};
+    struct ipc_data_t *ipc_data = (struct ipc_data_t *)ipcData;
+    struct ze_memory_provider_t *ze_provider =
+        (struct ze_memory_provider_t *)provider;
+
+    ze_result =
+        g_ze_ops.zeMemGetIpcHandle(ze_provider->context, ptr, &ze_ipc_handle);
+    if (ze_result != ZE_RESULT_SUCCESS) {
+        fprintf(stderr, "zeMemGetIpcHandle() failed\n");
+        return UMF_RESULT_ERROR_MEMORY_PROVIDER_SPECIFIC;
+    }
+
+    memcpy(&(ipc_data->ze_ipc_handle), &ze_ipc_handle,
+           sizeof(ze_ipc_mem_handle_t));
+    ipc_data->memory_type = ze_provider->memory_type;
+    ipc_data->size = size;
+
+    return UMF_RESULT_SUCCESS;
+}
+
+static umf_result_t ze_memory_provider_put_ipc_handle(void *provider,
+                                                      void *ipcData) {
+    ze_result_t ze_result;
+    struct ze_memory_provider_t *ze_provider =
+        (struct ze_memory_provider_t *)provider;
+    struct ipc_data_t *ipc_data = (struct ipc_data_t *)ipcData;
+
+    if (g_ze_ops.zeMemPutIpcHandle == NULL) {
+        // g_ze_ops.zeMemPutIpcHandle can be NULL because it was introduced
+        // starting from Level Zero 1.6
+        // TODO: Should we return UMF_RESULT_SUCCESS or UMF_RESULT_ERROR_NOT_SUPPORTED?
+        return UMF_RESULT_ERROR_NOT_SUPPORTED;
+    }
+
+    ze_result = g_ze_ops.zeMemPutIpcHandle(ze_provider->context,
+                                           ipc_data->ze_ipc_handle);
+    if (ze_result != ZE_RESULT_SUCCESS) {
+        fprintf(stderr, "zeMemPutIpcHandle() failed\n");
+        return UMF_RESULT_ERROR_MEMORY_PROVIDER_SPECIFIC;
+    }
+    return UMF_RESULT_SUCCESS;
+}
+
+static umf_result_t
+ze_memory_provider_open_ipc_handle(void *provider, void *ipcData, void **ptr) {
+    ze_result_t ze_result;
+    struct ipc_data_t *ipc_data = (struct ipc_data_t *)ipcData;
+    struct ze_memory_provider_t *ze_provider =
+        (struct ze_memory_provider_t *)provider;
+
+    ze_result =
+        g_ze_ops.zeMemOpenIpcHandle(ze_provider->context, ze_provider->device,
+                                    ipc_data->ze_ipc_handle, 0, ptr);
+    if (ze_result != ZE_RESULT_SUCCESS) {
+        fprintf(stderr, "zeMemOpenIpcHandle() failed\n");
+        return UMF_RESULT_ERROR_MEMORY_PROVIDER_SPECIFIC;
+    }
+
+    return UMF_RESULT_SUCCESS;
+}
+
+static umf_result_t ze_memory_provider_close_ipc_handle(void *provider,
+                                                        void *ptr) {
+    ze_result_t ze_result;
+    struct ze_memory_provider_t *ze_provider =
+        (struct ze_memory_provider_t *)provider;
+
+    ze_result = g_ze_ops.zeMemCloseIpcHandle(ze_provider->context, ptr);
+    if (ze_result != ZE_RESULT_SUCCESS) {
+        fprintf(stderr, "zeMemCloseIpcHandle() failed\n");
+        return UMF_RESULT_ERROR_MEMORY_PROVIDER_SPECIFIC;
+    }
+
+    return UMF_RESULT_SUCCESS;
+}
+
 static struct umf_memory_provider_ops_t UMF_LEVEL_ZERO_MEMORY_PROVIDER_OPS = {
     .version = UMF_VERSION_CURRENT,
     .initialize = ze_memory_provider_initialize,
@@ -268,6 +379,11 @@ static struct umf_memory_provider_ops_t UMF_LEVEL_ZERO_MEMORY_PROVIDER_OPS = {
     .ext.purge_force = ze_memory_provider_purge_force,
     .ext.allocation_merge = ze_memory_provider_allocation_merge,
     .ext.allocation_split = ze_memory_provider_allocation_split,
+    .ipc.get_ipc_handle_size = ze_memory_provider_get_ipc_handle_size,
+    .ipc.get_ipc_handle = ze_memory_provider_get_ipc_handle,
+    .ipc.put_ipc_handle = ze_memory_provider_put_ipc_handle,
+    .ipc.open_ipc_handle = ze_memory_provider_open_ipc_handle,
+    .ipc.close_ipc_handle = ze_memory_provider_close_ipc_handle,
 };
 
 umf_memory_provider_ops_t *umfLevelZeroMemoryProviderOps(void) {