diff options
Diffstat (limited to 'src/gallium/winsys/drm/vmware/xorg/vmw_ioctl.c')
-rw-r--r-- | src/gallium/winsys/drm/vmware/xorg/vmw_ioctl.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/gallium/winsys/drm/vmware/xorg/vmw_ioctl.c b/src/gallium/winsys/drm/vmware/xorg/vmw_ioctl.c new file mode 100644 index 0000000000..3cac5b7760 --- /dev/null +++ b/src/gallium/winsys/drm/vmware/xorg/vmw_ioctl.c @@ -0,0 +1,140 @@ +/********************************************************** + * Copyright 2009 VMware, Inc. All rights reserved. + * + * 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 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. + * + **********************************************************/ + +/** + * @file + * Contains the functions for creating dma buffers by calling + * the kernel via driver specific ioctls. + * + * @author Jakob Bornecrantz <jakob@vmware.com> + */ + +#define HAVE_STDINT_H +#define _FILE_OFFSET_BITS 64 + +#include <errno.h> +#include <stdlib.h> +#include <string.h> + +#include <sys/mman.h> +#include "xf86drm.h" +#include "../core/vmwgfx_drm.h" + +#include "vmw_driver.h" +#include "util/u_debug.h" + +struct vmw_dma_buffer +{ + void *data; + unsigned handle; + uint64_t map_handle; + unsigned map_count; + uint32_t size; +}; + +struct vmw_dma_buffer * +vmw_ioctl_buffer_create(struct vmw_driver *vmw, uint32_t size, unsigned *handle) +{ + struct vmw_dma_buffer *buf; + union drm_vmw_alloc_dmabuf_arg arg; + struct drm_vmw_alloc_dmabuf_req *req = &arg.req; + struct drm_vmw_dmabuf_rep *rep = &arg.rep; + int ret; + + buf = xcalloc(1, sizeof(*buf)); + if (!buf) + goto err; + + memset(&arg, 0, sizeof(arg)); + req->size = size; + do { + ret = drmCommandWriteRead(vmw->fd, DRM_VMW_ALLOC_DMABUF, &arg, sizeof(arg)); + } while (ret == -ERESTART); + + if (ret) { + debug_printf("IOCTL failed %d: %s\n", ret, strerror(-ret)); + goto err_free; + } + + + buf->data = NULL; + buf->handle = rep->handle; + buf->map_handle = rep->map_handle; + buf->map_count = 0; + buf->size = size; + + *handle = rep->handle; + + return buf; + +err_free: + xfree(buf); +err: + return NULL; +} + +void +vmw_ioctl_buffer_destroy(struct vmw_driver *vmw, struct vmw_dma_buffer *buf) +{ + struct drm_vmw_unref_dmabuf_arg arg; + + if (buf->data) { + munmap(buf->data, buf->size); + buf->data = NULL; + } + + memset(&arg, 0, sizeof(arg)); + arg.handle = buf->handle; + drmCommandWrite(vmw->fd, DRM_VMW_UNREF_DMABUF, &arg, sizeof(arg)); + + xfree(buf); +} + +void * +vmw_ioctl_buffer_map(struct vmw_driver *vmw, struct vmw_dma_buffer *buf) +{ + void *map; + + if (buf->data == NULL) { + map = mmap(NULL, buf->size, PROT_READ | PROT_WRITE, MAP_SHARED, + vmw->fd, buf->map_handle); + if (map == MAP_FAILED) { + debug_printf("%s: Map failed.\n", __FUNCTION__); + return NULL; + } + + buf->data = map; + } + + ++buf->map_count; + + return buf->data; +} + +void +vmw_ioctl_buffer_unmap(struct vmw_driver *vmw, struct vmw_dma_buffer *buf) +{ + --buf->map_count; +} |