scsi/megaraid/megaraid_mm.c

207 	 * Return the kioc to free pool
502  * First we search for a pool with smallest buffer that is >= @xferlen. If
503  * that pool has no free buffer, we will try for the next bigger size. If none
505  * @xferlen and attach it the pool.
510 	mm_dmapool_t	*pool;
527 		pool = &adp->dma_pool_list[i];
529 		if (xferlen > pool->buf_size)
535 		spin_lock_irqsave(&pool->lock, flags);
537 		if (!pool->in_use) {
539 			pool->in_use		= 1;
541 			kioc->buf_vaddr		= pool->vaddr;
542 			kioc->buf_paddr		= pool->paddr;
544 			spin_unlock_irqrestore(&pool->lock, flags);
548 			spin_unlock_irqrestore(&pool->lock, flags);
560 	 * We did not get any buffer from the preallocated pool. Let us try
563 	pool = &adp->dma_pool_list[right_pool];
565 	spin_lock_irqsave(&pool->lock, flags);
569 	kioc->buf_vaddr		= dma_pool_alloc(pool->handle, GFP_ATOMIC,
571 	spin_unlock_irqrestore(&pool->lock, flags);
584  * free kioc pool. If the kioc pool is empty, this function blocks till
629  * mraid_mm_dealloc_kioc - Return kioc to free pool
631  * @kioc	: uioc_t node to be returned to free pool
636 	mm_dmapool_t	*pool;
640 		pool = &adp->dma_pool_list[kioc->pool_index];
643 		spin_lock_irqsave(&pool->lock, flags);
647 		 * required buffer from the pool, we would have allocated
653 			dma_pool_free(pool->handle, kioc->buf_vaddr,
656 			pool->in_use = 0;
658 		spin_unlock_irqrestore(&pool->lock, flags);
661 	/* Return the kioc to the free pool */
941 	adapter->pthru_dma_pool = dma_pool_create("megaraid mm pthru pool",
1061  * We maintain a pool of dma buffers per each adapter. Each pool has one
1063  * We have just one 4k buffer in 4k pool, one 8k buffer in 8k pool etc. We
1065  * pool.
1070 	mm_dmapool_t	*pool;
1081 		pool = &adp->dma_pool_list[i];
1083 		pool->buf_size = bufsize;
1084 		spin_lock_init(&pool->lock);
1086 		pool->handle = dma_pool_create("megaraid mm data buffer",
1090 		if (!pool->handle) {
1094 		pool->vaddr = dma_pool_alloc(pool->handle, GFP_KERNEL,
1095 							&pool->paddr);
1097 		if (!pool->vaddr)
1186 	mm_dmapool_t	*pool;
1190 		pool = &adp->dma_pool_list[i];
1192 		if (pool->handle) {
1194 			if (pool->vaddr)
1195 				dma_pool_free(pool->handle, pool->vaddr,
1196 							pool->paddr);
1198 			dma_pool_destroy(pool->handle);
1199 			pool->handle = NULL;