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vmwgfx_prime.c revision 1.1.1.1 
      1 /**************************************************************************
      2  *
      3  * Copyright  2013 VMware, Inc., Palo Alto, CA., USA
      4  * All Rights Reserved.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the
      8  * "Software"), to deal in the Software without restriction, including
      9  * without limitation the rights to use, copy, modify, merge, publish,
     10  * distribute, sub license, and/or sell copies of the Software, and to
     11  * permit persons to whom the Software is furnished to do so, subject to
     12  * the following conditions:
     13  *
     14  * The above copyright notice and this permission notice (including the
     15  * next paragraph) shall be included in all copies or substantial portions
     16  * of the Software.
     17  *
     18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
     21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
     22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
     23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
     24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
     25  *
     26  **************************************************************************/
     27 /*
     28  * Authors:
     29  *     Thomas Hellstrom <thellstrom (at) vmware.com>
     30  *
     31  */
     32 
     33 #include "vmwgfx_drv.h"
     34 #include <linux/dma-buf.h>
     35 #include <drm/ttm/ttm_object.h>
     36 
     37 /*
     38  * DMA-BUF attach- and mapping methods. No need to implement
     39  * these until we have other virtual devices use them.
     40  */
     41 
     42 static int vmw_prime_map_attach(struct dma_buf *dma_buf,
     43 				struct device *target_dev,
     44 				struct dma_buf_attachment *attach)
     45 {
     46 	return -ENOSYS;
     47 }
     48 
     49 static void vmw_prime_map_detach(struct dma_buf *dma_buf,
     50 				 struct dma_buf_attachment *attach)
     51 {
     52 }
     53 
     54 static struct sg_table *vmw_prime_map_dma_buf(struct dma_buf_attachment *attach,
     55 					      enum dma_data_direction dir)
     56 {
     57 	return ERR_PTR(-ENOSYS);
     58 }
     59 
     60 static void vmw_prime_unmap_dma_buf(struct dma_buf_attachment *attach,
     61 				    struct sg_table *sgb,
     62 				    enum dma_data_direction dir)
     63 {
     64 }
     65 
     66 static void *vmw_prime_dmabuf_vmap(struct dma_buf *dma_buf)
     67 {
     68 	return NULL;
     69 }
     70 
     71 static void vmw_prime_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr)
     72 {
     73 }
     74 
     75 static void *vmw_prime_dmabuf_kmap_atomic(struct dma_buf *dma_buf,
     76 		unsigned long page_num)
     77 {
     78 	return NULL;
     79 }
     80 
     81 static void vmw_prime_dmabuf_kunmap_atomic(struct dma_buf *dma_buf,
     82 		unsigned long page_num, void *addr)
     83 {
     84 
     85 }
     86 static void *vmw_prime_dmabuf_kmap(struct dma_buf *dma_buf,
     87 		unsigned long page_num)
     88 {
     89 	return NULL;
     90 }
     91 
     92 static void vmw_prime_dmabuf_kunmap(struct dma_buf *dma_buf,
     93 		unsigned long page_num, void *addr)
     94 {
     95 
     96 }
     97 
     98 static int vmw_prime_dmabuf_mmap(struct dma_buf *dma_buf,
     99 				 struct vm_area_struct *vma)
    100 {
    101 	WARN_ONCE(true, "Attempted use of dmabuf mmap. Bad.\n");
    102 	return -ENOSYS;
    103 }
    104 
    105 const struct dma_buf_ops vmw_prime_dmabuf_ops =  {
    106 	.attach = vmw_prime_map_attach,
    107 	.detach = vmw_prime_map_detach,
    108 	.map_dma_buf = vmw_prime_map_dma_buf,
    109 	.unmap_dma_buf = vmw_prime_unmap_dma_buf,
    110 	.release = NULL,
    111 	.kmap = vmw_prime_dmabuf_kmap,
    112 	.kmap_atomic = vmw_prime_dmabuf_kmap_atomic,
    113 	.kunmap = vmw_prime_dmabuf_kunmap,
    114 	.kunmap_atomic = vmw_prime_dmabuf_kunmap_atomic,
    115 	.mmap = vmw_prime_dmabuf_mmap,
    116 	.vmap = vmw_prime_dmabuf_vmap,
    117 	.vunmap = vmw_prime_dmabuf_vunmap,
    118 };
    119 
    120 int vmw_prime_fd_to_handle(struct drm_device *dev,
    121 			   struct drm_file *file_priv,
    122 			   int fd, u32 *handle)
    123 {
    124 	struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
    125 
    126 	return ttm_prime_fd_to_handle(tfile, fd, handle);
    127 }
    128 
    129 int vmw_prime_handle_to_fd(struct drm_device *dev,
    130 			   struct drm_file *file_priv,
    131 			   uint32_t handle, uint32_t flags,
    132 			   int *prime_fd)
    133 {
    134 	struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
    135 
    136 	return ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd);
    137 }
    138