dev/mthca/mthca_memfree.c

47  * per chunk.
63 static void mthca_free_icm_pages(struct mthca_dev *dev, struct mthca_icm_chunk *chunk)
67 	if (chunk->nsg > 0)
68 		pci_unmap_sg(dev->pdev, chunk->mem, chunk->npages,
71 	for (i = 0; i < chunk->npages; ++i)
72 		__free_pages(sg_page(&chunk->mem[i]),
73 			     get_order(chunk->mem[i].length));
76 static void mthca_free_icm_coherent(struct mthca_dev *dev, struct mthca_icm_chunk *chunk)
80 	for (i = 0; i < chunk->npages; ++i) {
81 		dma_free_coherent(&dev->pdev->dev, chunk->mem[i].length,
82 				  lowmem_page_address(sg_page(&chunk->mem[i])),
83 				  sg_dma_address(&chunk->mem[i]));
89 	struct mthca_icm_chunk *chunk, *tmp;
94 	list_for_each_entry_safe(chunk, tmp, &icm->chunk_list, list) {
96 			mthca_free_icm_coherent(dev, chunk);
98 			mthca_free_icm_pages(dev, chunk);
100 		kfree(chunk);
140 	struct mthca_icm_chunk *chunk = NULL;
157 		if (!chunk) {
158 			chunk = kmalloc(sizeof *chunk,
160 			if (!chunk)
163 			sg_init_table(chunk->mem, MTHCA_ICM_CHUNK_LEN);
164 			chunk->npages = 0;
165 			chunk->nsg    = 0;
166 			list_add_tail(&chunk->list, &icm->chunk_list);
174 						       &chunk->mem[chunk->npages],
177 			ret = mthca_alloc_icm_pages(&chunk->mem[chunk->npages],
181 			++chunk->npages;
184 				++chunk->nsg;
185 			else if (chunk->npages == MTHCA_ICM_CHUNK_LEN) {
186 				chunk->nsg = pci_map_sg(dev->pdev, chunk->mem,
187 							chunk->npages,
190 				if (chunk->nsg <= 0)
194 			if (chunk->npages == MTHCA_ICM_CHUNK_LEN)
195 				chunk = NULL;
205 	if (!coherent && chunk) {
206 		chunk->nsg = pci_map_sg(dev->pdev, chunk->mem,
207 					chunk->npages,
210 		if (chunk->nsg <= 0)
280 	struct mthca_icm_chunk *chunk;
296 	list_for_each_entry(chunk, &icm->chunk_list, list) {
297 		for (i = 0; i < chunk->npages; ++i) {
299 				if (sg_dma_len(&chunk->mem[i]) > dma_offset)
300 					*dma_handle = sg_dma_address(&chunk->mem[i]) +
302 				dma_offset -= sg_dma_len(&chunk->mem[i]);
307 			if (chunk->mem[i].length > offset) {
308 				page = sg_page(&chunk->mem[i]);
311 			offset -= chunk->mem[i].length;
402 		 * Add a reference to this ICM chunk so that it never