56 static void iomd_get_next_sg(struct scatterlist *sg, struct iomd_dma *idma)  in iomd_get_next_sg()  argument
60 	if (idma->dma.sg) {  in iomd_get_next_sg()
61 		sg->dma_address = idma->dma_addr;  in iomd_get_next_sg()
64 		end = offset + idma->dma_len;  in iomd_get_next_sg()
74 		idma->dma_len -= end - offset;  in iomd_get_next_sg()
75 		idma->dma_addr += end - offset;  in iomd_get_next_sg()
77 		if (idma->dma_len == 0) {  in iomd_get_next_sg()
78 			if (idma->dma.sgcount > 1) {  in iomd_get_next_sg()
79 				idma->dma.sg = sg_next(idma->dma.sg);  in iomd_get_next_sg()
80 				idma->dma_addr = idma->dma.sg->dma_address;  in iomd_get_next_sg()
81 				idma->dma_len = idma->dma.sg->length;  in iomd_get_next_sg()
82 				idma->dma.sgcount--;  in iomd_get_next_sg()
84 				idma->dma.sg = NULL;  in iomd_get_next_sg()
99 	struct iomd_dma *idma = dev_id;  in iomd_dma_handle()  local
100 	unsigned long base = idma->base;  in iomd_dma_handle()
109 		if ((idma->state ^ status) & DMA_ST_AB)  in iomd_dma_handle()
110 			iomd_get_next_sg(&idma->cur_sg, idma);  in iomd_dma_handle()
115 			iomd_writel(idma->cur_sg.dma_address, base + CURA);  in iomd_dma_handle()
116 			iomd_writel(idma->cur_sg.length, base + ENDA);  in iomd_dma_handle()
117 			idma->state = DMA_ST_AB;  in iomd_dma_handle()
122 			iomd_writel(idma->cur_sg.dma_address, base + CURB);  in iomd_dma_handle()
123 			iomd_writel(idma->cur_sg.length, base + ENDB);  in iomd_dma_handle()
124 			idma->state = 0;  in iomd_dma_handle()
129 		    idma->cur_sg.length == (DMA_END_S|DMA_END_L))  in iomd_dma_handle()
133 	idma->state = ~DMA_ST_AB;  in iomd_dma_handle()
141 	struct iomd_dma *idma = container_of(dma, struct iomd_dma, dma);  in iomd_request_dma()  local
143 	return request_irq(idma->irq, iomd_dma_handle,  in iomd_request_dma()
144 			   0, idma->dma.device_id, idma);  in iomd_request_dma()
149 	struct iomd_dma *idma = container_of(dma, struct iomd_dma, dma);  in iomd_free_dma()  local
151 	free_irq(idma->irq, idma);  in iomd_free_dma()
156 	struct iomd_dma *idma = container_of(dma, struct iomd_dma, dma);  in iomd_enable_dma()  local
157 	unsigned long dma_base = idma->base;  in iomd_enable_dma()
160 	if (idma->dma.invalid) {  in iomd_enable_dma()
161 		idma->dma.invalid = 0;  in iomd_enable_dma()
167 		if (!idma->dma.sg) {  in iomd_enable_dma()
168 			idma->dma.sg = &idma->dma.buf;  in iomd_enable_dma()
169 			idma->dma.sgcount = 1;  in iomd_enable_dma()
170 			idma->dma.buf.length = idma->dma.count;  in iomd_enable_dma()
171 			idma->dma.buf.dma_address = dma_map_single(NULL,  in iomd_enable_dma()
172 				idma->dma.addr, idma->dma.count,  in iomd_enable_dma()
173 				idma->dma.dma_mode == DMA_MODE_READ ?  in iomd_enable_dma()
178 		idma->state = DMA_ST_AB;  in iomd_enable_dma()
181 	if (idma->dma.dma_mode == DMA_MODE_READ)  in iomd_enable_dma()
185 	enable_irq(idma->irq);  in iomd_enable_dma()
190 	struct iomd_dma *idma = container_of(dma, struct iomd_dma, dma);  in iomd_disable_dma()  local
191 	unsigned long dma_base = idma->base;  in iomd_disable_dma()
195 	if (idma->state != ~DMA_ST_AB)  in iomd_disable_dma()
196 		disable_irq(idma->irq);  in iomd_disable_dma()