drivers/fpga/dfl-afu-dma-region.c

118  * @iova: address of the dma memory area
121  * Compare the dma memory area defined by @iova and @size with given dma region.
125 				  u64 iova, u64 size)
127 	if (!size && region->iova != iova)
130 	return (region->iova <= iova) &&
131 		(region->length + region->iova >= iova + size);
149 	dev_dbg(&pdata->dev->dev, "add region (iova = %llx)\n",
150 		(unsigned long long)region->iova);
161 		if (dma_region_check_iova(this, region->iova, region->length))
164 		if (region->iova < this->iova)
166 		else if (region->iova > this->iova)
190 	dev_dbg(&pdata->dev->dev, "del region (iova = %llx)\n",
191 		(unsigned long long)region->iova);
212 		dev_dbg(&pdata->dev->dev, "del region (iova = %llx)\n",
213 			(unsigned long long)region->iova);
217 		if (region->iova)
219 				       region->iova, region->length,
231  * afu_dma_region_find - find the dma region from rbtree based on iova and size
233  * @iova: address of the dma memory area
236  * It finds the dma region from the rbtree based on @iova and @size:
237  * - if @size == 0, it finds the dma region which starts from @iova
239  *   [@iova, @iova+size)
245 afu_dma_region_find(struct dfl_feature_platform_data *pdata, u64 iova, u64 size)
256 		if (dma_region_check_iova(region, iova, size)) {
257 			dev_dbg(dev, "find region (iova = %llx)\n",
258 				(unsigned long long)region->iova);
262 		if (iova < region->iova)
264 		else if (iova > region->iova)
267 			/* the iova region is not fully covered. */
271 	dev_dbg(dev, "region with iova %llx and size %llx is not found\n",
272 		(unsigned long long)iova, (unsigned long long)size);
278  * afu_dma_region_find_iova - find the dma region from rbtree by iova
280  * @iova: address of the dma region
285 afu_dma_region_find_iova(struct dfl_feature_platform_data *pdata, u64 iova)
287 	return afu_dma_region_find(pdata, iova, 0);
295  * @iova: pointer of iova address
298  * of the memory region via @iova.
302 		       u64 user_addr, u64 length, u64 *iova)
340 	region->iova = dma_map_page(dfl_fpga_pdata_to_parent(pdata),
344 	if (dma_mapping_error(dfl_fpga_pdata_to_parent(pdata), region->iova)) {
350 	*iova = region->iova;
364 		       region->iova, region->length, DMA_BIDIRECTIONAL);
375  * @iova: dma address of the region
377  * Unmap dma memory region based on @iova.
380 int afu_dma_unmap_region(struct dfl_feature_platform_data *pdata, u64 iova)
385 	region = afu_dma_region_find_iova(pdata, iova);
400 		       region->iova, region->length, DMA_BIDIRECTIONAL);