1 // SPDX-License-Identifier: GPL-2.0+
16 	db->status = status;  in __fdma_db_add()
18 	return cb(fdma, dcb_idx, db_idx, &db->dataptr);  in __fdma_db_add()
28 			     fdma->ops.dataptr_cb);  in fdma_db_add()
32 int __fdma_dcb_add(struct fdma *fdma, int dcb_idx, u64 info, u64 status,  in __fdma_dcb_add()  argument
40 	for (i = 0; i < fdma->n_dbs; i++) {  in __fdma_dcb_add()
46 	err = dcb_cb(fdma, dcb_idx, &fdma->last_dcb->nextptr);  in __fdma_dcb_add()
50 	fdma->last_dcb = dcb;  in __fdma_dcb_add()
52 	dcb->nextptr = FDMA_DCB_INVALID_DATA;  in __fdma_dcb_add()
53 	dcb->info = info;  in __fdma_dcb_add()
60 int fdma_dcb_add(struct fdma *fdma, int dcb_idx, u64 info, u64 status)  in fdma_dcb_add()  argument
64 			      info, status,  in fdma_dcb_add()
65 			      fdma->ops.nextptr_cb,  in fdma_dcb_add()
66 			      fdma->ops.dataptr_cb);  in fdma_dcb_add()
71 int fdma_dcbs_init(struct fdma *fdma, u64 info, u64 status)  in fdma_dcbs_init()  argument
75 	fdma->last_dcb = fdma->dcbs;  in fdma_dcbs_init()
76 	fdma->db_index = 0;  in fdma_dcbs_init()
77 	fdma->dcb_index = 0;  in fdma_dcbs_init()
79 	for (i = 0; i < fdma->n_dcbs; i++) {  in fdma_dcbs_init()
80 		err = fdma_dcb_add(fdma, i, info, status);  in fdma_dcbs_init()
89 /* Allocate coherent DMA memory for FDMA. */
92 	fdma->dcbs = dma_alloc_coherent(dev,  in fdma_alloc_coherent()
93 					fdma->size,  in fdma_alloc_coherent()
94 					&fdma->dma,  in fdma_alloc_coherent()
96 	if (!fdma->dcbs)  in fdma_alloc_coherent()
97 		return -ENOMEM;  in fdma_alloc_coherent()
106 	fdma->dcbs = kzalloc(fdma->size, GFP_KERNEL);  in fdma_alloc_phys()
107 	if (!fdma->dcbs)  in fdma_alloc_phys()
108 		return -ENOMEM;  in fdma_alloc_phys()
110 	fdma->dma = virt_to_phys(fdma->dcbs);  in fdma_alloc_phys()
116 /* Free coherent DMA memory. */
119 	dma_free_coherent(dev, fdma->size, fdma->dcbs, fdma->dma);  in fdma_free_coherent()
126 	kfree(fdma->dcbs);  in fdma_free_phys()
133 	return ALIGN(sizeof(struct fdma_dcb) * fdma->n_dcbs, PAGE_SIZE);  in fdma_get_size()
142 	return ALIGN(fdma->n_dcbs * sizeof(struct fdma_dcb) +  in fdma_get_size_contiguous()
143 		     fdma->n_dcbs * fdma->n_dbs * fdma->db_size,  in fdma_get_size_contiguous()