drivers/gpu/drm/qxl/qxl_image.c

   1 /*
   2  * Copyright 2013 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Dave Airlie
  23  *          Alon Levy
  24  */
  25
  26 #include <linux/gfp.h>
  27 #include <linux/slab.h>
  28
  29 #include "qxl_drv.h"
  30 #include "qxl_object.h"
  31
  32 static int
  33 qxl_image_create_helper(struct qxl_device *qdev,
  34                         struct qxl_release *release,
  35                         struct qxl_bo **image_bo,
  36                         const uint8_t *data,
  37                         int width, int height,
  38                         int depth, unsigned int hash,
  39                         int stride)
  40 {
  41         struct qxl_image *image;
  42         struct qxl_data_chunk *chunk;
  43         int i;
  44         int chunk_stride;
  45         int linesize = width * depth / 8;
  46         struct qxl_bo *chunk_bo;
  47         int ret;
  48         void *ptr;
  49         /* Chunk */
  50         /* FIXME: Check integer overflow */
  51         /* TODO: variable number of chunks */
  52         chunk_stride = stride; /* TODO: should use linesize, but it renders
  53                                   wrong (check the bitmaps are sent correctly
  54                                   first) */
  55         ret = qxl_alloc_bo_reserved(qdev, sizeof(*chunk) + height * chunk_stride,
  56                                     &chunk_bo);
  57
  58         ptr = qxl_bo_kmap_atomic_page(qdev, chunk_bo, 0);
  59         chunk = ptr;
  60         chunk->data_size = height * chunk_stride;
  61         chunk->prev_chunk = 0;
  62         chunk->next_chunk = 0;
  63         qxl_bo_kunmap_atomic_page(qdev, chunk_bo, ptr);
  64
  65         {
  66                 void *k_data, *i_data;
  67                 int remain;
  68                 int page;
  69                 int size;
  70                 if (stride == linesize && chunk_stride == stride) {
  71                         remain = linesize * height;
  72                         page = 0;
  73                         i_data = (void *)data;
  74
  75                         while (remain > 0) {
  76                                 ptr = qxl_bo_kmap_atomic_page(qdev, chunk_bo, page << PAGE_SHIFT);
  77
  78                                 if (page == 0) {
  79                                         chunk = ptr;
  80                                         k_data = chunk->data;
  81                                         size = PAGE_SIZE - offsetof(struct qxl_data_chunk, data);
  82                                 } else {
  83                                         k_data = ptr;
  84                                         size = PAGE_SIZE;
  85                                 }
  86                                 size = min(size, remain);
  87
  88                                 memcpy(k_data, i_data, size);
  89
  90                                 qxl_bo_kunmap_atomic_page(qdev, chunk_bo, ptr);
  91                                 i_data += size;
  92                                 remain -= size;
  93                                 page++;
  94                         }
  95                 } else {
  96                         unsigned page_base, page_offset, out_offset;
  97                         for (i = 0 ; i < height ; ++i) {
  98                                 i_data = (void *)data + i * stride;
  99                                 remain = linesize;
 100                                 out_offset = offsetof(struct qxl_data_chunk, data) + i * chunk_stride;
 101
 102                                 while (remain > 0) {
 103                                         page_base = out_offset & PAGE_MASK;
 104                                         page_offset = offset_in_page(out_offset);
 105
 106                                         size = min((int)(PAGE_SIZE - page_offset), remain);
 107
 108                                         ptr = qxl_bo_kmap_atomic_page(qdev, chunk_bo, page_base);
 109                                         k_data = ptr + page_offset;
 110                                         memcpy(k_data, i_data, size);
 111                                         qxl_bo_kunmap_atomic_page(qdev, chunk_bo, ptr);
 112                                         remain -= size;
 113                                         i_data += size;
 114                                         out_offset += size;
 115                                 }
 116                         }
 117                 }
 118         }
 119
 120
 121         qxl_bo_kunmap(chunk_bo);
 122
 123         /* Image */
 124         ret = qxl_alloc_bo_reserved(qdev, sizeof(*image), image_bo);
 125
 126         ptr = qxl_bo_kmap_atomic_page(qdev, *image_bo, 0);
 127         image = ptr;
 128
 129         image->descriptor.id = 0;
 130         image->descriptor.type = SPICE_IMAGE_TYPE_BITMAP;
 131
 132         image->descriptor.flags = 0;
 133         image->descriptor.width = width;
 134         image->descriptor.height = height;
 135
 136         switch (depth) {
 137         case 1:
 138                 /* TODO: BE? check by arch? */
 139                 image->u.bitmap.format = SPICE_BITMAP_FMT_1BIT_BE;
 140                 break;
 141         case 24:
 142                 image->u.bitmap.format = SPICE_BITMAP_FMT_24BIT;
 143                 break;
 144         case 32:
 145                 image->u.bitmap.format = SPICE_BITMAP_FMT_32BIT;
 146                 break;
 147         default:
 148                 DRM_ERROR("unsupported image bit depth\n");
 149                 return -EINVAL; /* TODO: cleanup */
 150         }
 151         image->u.bitmap.flags = QXL_BITMAP_TOP_DOWN;
 152         image->u.bitmap.x = width;
 153         image->u.bitmap.y = height;
 154         image->u.bitmap.stride = chunk_stride;
 155         image->u.bitmap.palette = 0;
 156         image->u.bitmap.data = qxl_bo_physical_address(qdev, chunk_bo, 0);
 157         qxl_release_add_res(qdev, release, chunk_bo);
 158         qxl_bo_unreserve(chunk_bo);
 159         qxl_bo_unref(&chunk_bo);
 160
 161         qxl_bo_kunmap_atomic_page(qdev, *image_bo, ptr);
 162
 163         return 0;
 164 }
 165
 166 int qxl_image_create(struct qxl_device *qdev,
 167                      struct qxl_release *release,
 168                      struct qxl_bo **image_bo,
 169                      const uint8_t *data,
 170                      int x, int y, int width, int height,
 171                      int depth, int stride)
 172 {
 173         data += y * stride + x * (depth / 8);
 174         return qxl_image_create_helper(qdev, release, image_bo, data,
 175                                        width, height, depth, 0, stride);
 176 }