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qxl_image.c revision 1.1
      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_allocate_chunk(struct qxl_device *qdev,
     34 		   struct qxl_release *release,
     35 		   struct qxl_drm_image *image,
     36 		   unsigned int chunk_size)
     37 {
     38 	struct qxl_drm_chunk *chunk;
     39 	int ret;
     40 
     41 	chunk = kmalloc(sizeof(struct qxl_drm_chunk), GFP_KERNEL);
     42 	if (!chunk)
     43 		return -ENOMEM;
     44 
     45 	ret = qxl_alloc_bo_reserved(qdev, release, chunk_size, &chunk->bo);
     46 	if (ret) {
     47 		kfree(chunk);
     48 		return ret;
     49 	}
     50 
     51 	list_add_tail(&chunk->head, &image->chunk_list);
     52 	return 0;
     53 }
     54 
     55 int
     56 qxl_image_alloc_objects(struct qxl_device *qdev,
     57 			struct qxl_release *release,
     58 			struct qxl_drm_image **image_ptr,
     59 			int height, int stride)
     60 {
     61 	struct qxl_drm_image *image;
     62 	int ret;
     63 
     64 	image = kmalloc(sizeof(struct qxl_drm_image), GFP_KERNEL);
     65 	if (!image)
     66 		return -ENOMEM;
     67 
     68 	INIT_LIST_HEAD(&image->chunk_list);
     69 
     70 	ret = qxl_alloc_bo_reserved(qdev, release, sizeof(struct qxl_image), &image->bo);
     71 	if (ret) {
     72 		kfree(image);
     73 		return ret;
     74 	}
     75 
     76 	ret = qxl_allocate_chunk(qdev, release, image, sizeof(struct qxl_data_chunk) + stride * height);
     77 	if (ret) {
     78 		qxl_bo_unref(&image->bo);
     79 		kfree(image);
     80 		return ret;
     81 	}
     82 	*image_ptr = image;
     83 	return 0;
     84 }
     85 
     86 void qxl_image_free_objects(struct qxl_device *qdev, struct qxl_drm_image *dimage)
     87 {
     88 	struct qxl_drm_chunk *chunk, *tmp;
     89 
     90 	list_for_each_entry_safe(chunk, tmp, &dimage->chunk_list, head) {
     91 		qxl_bo_unref(&chunk->bo);
     92 		kfree(chunk);
     93 	}
     94 
     95 	qxl_bo_unref(&dimage->bo);
     96 	kfree(dimage);
     97 }
     98 
     99 static int
    100 qxl_image_init_helper(struct qxl_device *qdev,
    101 		      struct qxl_release *release,
    102 		      struct qxl_drm_image *dimage,
    103 		      const uint8_t *data,
    104 		      int width, int height,
    105 		      int depth, unsigned int hash,
    106 		      int stride)
    107 {
    108 	struct qxl_drm_chunk *drv_chunk;
    109 	struct qxl_image *image;
    110 	struct qxl_data_chunk *chunk;
    111 	int i;
    112 	int chunk_stride;
    113 	int linesize = width * depth / 8;
    114 	struct qxl_bo *chunk_bo, *image_bo;
    115 	void *ptr;
    116 	/* Chunk */
    117 	/* FIXME: Check integer overflow */
    118 	/* TODO: variable number of chunks */
    119 
    120 	drv_chunk = list_first_entry(&dimage->chunk_list, struct qxl_drm_chunk, head);
    121 
    122 	chunk_bo = drv_chunk->bo;
    123 	chunk_stride = stride; /* TODO: should use linesize, but it renders
    124 				  wrong (check the bitmaps are sent correctly
    125 				  first) */
    126 
    127 	ptr = qxl_bo_kmap_atomic_page(qdev, chunk_bo, 0);
    128 	chunk = ptr;
    129 	chunk->data_size = height * chunk_stride;
    130 	chunk->prev_chunk = 0;
    131 	chunk->next_chunk = 0;
    132 	qxl_bo_kunmap_atomic_page(qdev, chunk_bo, ptr);
    133 
    134 	{
    135 		void *k_data, *i_data;
    136 		int remain;
    137 		int page;
    138 		int size;
    139 		if (stride == linesize && chunk_stride == stride) {
    140 			remain = linesize * height;
    141 			page = 0;
    142 			i_data = (void *)data;
    143 
    144 			while (remain > 0) {
    145 				ptr = qxl_bo_kmap_atomic_page(qdev, chunk_bo, page << PAGE_SHIFT);
    146 
    147 				if (page == 0) {
    148 					chunk = ptr;
    149 					k_data = chunk->data;
    150 					size = PAGE_SIZE - offsetof(struct qxl_data_chunk, data);
    151 				} else {
    152 					k_data = ptr;
    153 					size = PAGE_SIZE;
    154 				}
    155 				size = min(size, remain);
    156 
    157 				memcpy(k_data, i_data, size);
    158 
    159 				qxl_bo_kunmap_atomic_page(qdev, chunk_bo, ptr);
    160 				i_data += size;
    161 				remain -= size;
    162 				page++;
    163 			}
    164 		} else {
    165 			unsigned page_base, page_offset, out_offset;
    166 			for (i = 0 ; i < height ; ++i) {
    167 				i_data = (void *)data + i * stride;
    168 				remain = linesize;
    169 				out_offset = offsetof(struct qxl_data_chunk, data) + i * chunk_stride;
    170 
    171 				while (remain > 0) {
    172 					page_base = out_offset & PAGE_MASK;
    173 					page_offset = offset_in_page(out_offset);
    174 					size = min((int)(PAGE_SIZE - page_offset), remain);
    175 
    176 					ptr = qxl_bo_kmap_atomic_page(qdev, chunk_bo, page_base);
    177 					k_data = ptr + page_offset;
    178 					memcpy(k_data, i_data, size);
    179 					qxl_bo_kunmap_atomic_page(qdev, chunk_bo, ptr);
    180 					remain -= size;
    181 					i_data += size;
    182 					out_offset += size;
    183 				}
    184 			}
    185 		}
    186 	}
    187 	qxl_bo_kunmap(chunk_bo);
    188 
    189 	image_bo = dimage->bo;
    190 	ptr = qxl_bo_kmap_atomic_page(qdev, image_bo, 0);
    191 	image = ptr;
    192 
    193 	image->descriptor.id = 0;
    194 	image->descriptor.type = SPICE_IMAGE_TYPE_BITMAP;
    195 
    196 	image->descriptor.flags = 0;
    197 	image->descriptor.width = width;
    198 	image->descriptor.height = height;
    199 
    200 	switch (depth) {
    201 	case 1:
    202 		/* TODO: BE? check by arch? */
    203 		image->u.bitmap.format = SPICE_BITMAP_FMT_1BIT_BE;
    204 		break;
    205 	case 24:
    206 		image->u.bitmap.format = SPICE_BITMAP_FMT_24BIT;
    207 		break;
    208 	case 32:
    209 		image->u.bitmap.format = SPICE_BITMAP_FMT_32BIT;
    210 		break;
    211 	default:
    212 		DRM_ERROR("unsupported image bit depth\n");
    213 		return -EINVAL; /* TODO: cleanup */
    214 	}
    215 	image->u.bitmap.flags = QXL_BITMAP_TOP_DOWN;
    216 	image->u.bitmap.x = width;
    217 	image->u.bitmap.y = height;
    218 	image->u.bitmap.stride = chunk_stride;
    219 	image->u.bitmap.palette = 0;
    220 	image->u.bitmap.data = qxl_bo_physical_address(qdev, chunk_bo, 0);
    221 
    222 	qxl_bo_kunmap_atomic_page(qdev, image_bo, ptr);
    223 
    224 	return 0;
    225 }
    226 
    227 int qxl_image_init(struct qxl_device *qdev,
    228 		     struct qxl_release *release,
    229 		     struct qxl_drm_image *dimage,
    230 		     const uint8_t *data,
    231 		     int x, int y, int width, int height,
    232 		     int depth, int stride)
    233 {
    234 	data += y * stride + x * (depth / 8);
    235 	return qxl_image_init_helper(qdev, release, dimage, data,
    236 				       width, height, depth, 0, stride);
    237 }
    238