sync code with last improvements from OpenBSD

lib/libdrm/tests/radeon/rbo.c

@@ -0,0 +1,171 @@
+/*
+ * Copyright © 2011 Red Hat
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jerome Glisse <j.glisse@gmail.com>
+ */
+#define _FILE_OFFSET_BITS 64
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include "xf86drm.h"
+#include "radeon_drm.h"
+#include "rbo.h"
+
+struct rbo *rbo(int fd, unsigned handle, unsigned size,
+                unsigned alignment, void *ptr)
+{
+    struct rbo *bo;
+    int r;
+
+    bo = calloc(1, sizeof(*bo));
+    if (bo == NULL) {
+        return NULL;
+    }
+    list_inithead(&bo->list);
+    bo->fd = fd;
+    bo->size = size;
+    bo->handle = handle;
+    bo->refcount = 1;
+    bo->alignment = alignment;
+
+    if (handle) {
+        struct drm_gem_open open_arg;
+
+        memset(&open_arg, 0, sizeof(open_arg));
+        open_arg.name = handle;
+        r = drmIoctl(fd, DRM_IOCTL_GEM_OPEN, &open_arg);
+        if (r != 0) {
+            free(bo);
+            return NULL;
+        }
+        bo->handle = open_arg.handle;
+    } else {
+        struct drm_radeon_gem_create args;
+
+        args.size = size;
+        args.alignment = alignment;
+        args.initial_domain = RADEON_GEM_DOMAIN_CPU;
+        args.flags = 0;
+        args.handle = 0;
+        r = drmCommandWriteRead(fd, DRM_RADEON_GEM_CREATE,
+                                &args, sizeof(args));
+        bo->handle = args.handle;
+        if (r) {
+            fprintf(stderr, "Failed to allocate :\n");
+            fprintf(stderr, "   size      : %d bytes\n", size);
+            fprintf(stderr, "   alignment : %d bytes\n", alignment);
+            free(bo);
+            return NULL;
+        }
+    }
+    if (ptr) {
+        if (rbo_map(bo)) {
+            fprintf(stderr, "%s failed to copy data into bo\n", __func__);
+            return rbo_decref(bo);
+        }
+        memcpy(bo->data, ptr, size);
+        rbo_unmap(bo);
+    }
+    return bo;
+}
+
+int rbo_map(struct rbo *bo)
+{
+    struct drm_radeon_gem_mmap args;
+    void *ptr;
+    int r;
+
+    if (bo->mapcount++ != 0) {
+        return 0;
+    }
+    /* Zero out args to make valgrind happy */
+    memset(&args, 0, sizeof(args));
+    args.handle = bo->handle;
+    args.offset = 0;
+    args.size = (uint64_t)bo->size;
+    r = drmCommandWriteRead(bo->fd, DRM_RADEON_GEM_MMAP,
+                            &args, sizeof(args));
+    if (r) {
+        fprintf(stderr, "error mapping %p 0x%08X (error = %d)\n",
+            bo, bo->handle, r);
+        return r;
+    }
+    ptr = mmap(0, args.size, PROT_READ|PROT_WRITE, MAP_SHARED, bo->fd, args.addr_ptr);
+    if (ptr == MAP_FAILED) {
+        fprintf(stderr, "%s failed to map bo\n", __func__);
+        return -errno;
+    }
+    bo->data = ptr;
+    return 0;
+}
+
+void rbo_unmap(struct rbo *bo)
+{
+    if (--bo->mapcount > 0) {
+        return;
+    }
+    munmap(bo->data, bo->size);
+    bo->data = NULL;
+}
+
+struct rbo *rbo_incref(struct rbo *bo)
+{
+    bo->refcount++;
+    return bo;
+}
+
+struct rbo *rbo_decref(struct rbo *bo)
+{
+    struct drm_gem_close args;
+
+    if (bo == NULL)
+        return NULL;
+    if (--bo->refcount > 0) {
+        return NULL;
+    }
+
+    munmap(bo->data, bo->size);
+    memset(&args, 0, sizeof(args));
+    args.handle = bo->handle;
+    drmIoctl(bo->fd, DRM_IOCTL_GEM_CLOSE, &args);
+    memset(bo, 0, sizeof(struct rbo));
+    free(bo);
+    return NULL;
+}
+
+int rbo_wait(struct rbo *bo)
+{
+    struct drm_radeon_gem_wait_idle args;
+    int ret;
+
+    /* Zero out args to make valgrind happy */
+    memset(&args, 0, sizeof(args));
+    args.handle = bo->handle;
+    do {
+        ret = drmCommandWriteRead(bo->fd, DRM_RADEON_GEM_WAIT_IDLE,
+                                  &args, sizeof(args));
+    } while (ret == -EBUSY);
+    return ret;
+}