54 static void iomd_get_next_sg(struct iomd_dma *idma)  in iomd_get_next_sg()  argument
58 	if (idma->dma.sg) {  in iomd_get_next_sg()
59 		idma->cur_addr = idma->dma_addr;  in iomd_get_next_sg()
60 		offset = idma->cur_addr & ~PAGE_MASK;  in iomd_get_next_sg()
62 		end = offset + idma->dma_len;  in iomd_get_next_sg()
70 		idma->cur_len = end - TRANSFER_SIZE;  in iomd_get_next_sg()
72 		idma->dma_len -= end - offset;  in iomd_get_next_sg()
73 		idma->dma_addr += end - offset;  in iomd_get_next_sg()
75 		if (idma->dma_len == 0) {  in iomd_get_next_sg()
76 			if (idma->dma.sgcount > 1) {  in iomd_get_next_sg()
77 				idma->dma.sg = sg_next(idma->dma.sg);  in iomd_get_next_sg()
78 				idma->dma_addr = idma->dma.sg->dma_address;  in iomd_get_next_sg()
79 				idma->dma_len = idma->dma.sg->length;  in iomd_get_next_sg()
80 				idma->dma.sgcount--;  in iomd_get_next_sg()
82 				idma->dma.sg = NULL;  in iomd_get_next_sg()
88 		idma->cur_addr = 0;  in iomd_get_next_sg()
89 		idma->cur_len = 0;  in iomd_get_next_sg()
92 	idma->cur_len |= flags;  in iomd_get_next_sg()
97 	struct iomd_dma *idma = dev_id;  in iomd_dma_handle()  local
98 	void __iomem *base = idma->base;  in iomd_dma_handle()
99 	unsigned int state = idma->state;  in iomd_dma_handle()
108 			iomd_get_next_sg(idma);  in iomd_dma_handle()
119 		writel(idma->cur_addr, base + cur);  in iomd_dma_handle()
120 		writel(idma->cur_len, base + end);  in iomd_dma_handle()
123 		    idma->cur_len == (DMA_END_S|DMA_END_L))  in iomd_dma_handle()
130 	idma->state = state;  in iomd_dma_handle()
136 	struct iomd_dma *idma = container_of(dma, struct iomd_dma, dma);  in iomd_request_dma()  local
138 	return request_irq(idma->irq, iomd_dma_handle,  in iomd_request_dma()
139 			   0, idma->dma.device_id, idma);  in iomd_request_dma()
144 	struct iomd_dma *idma = container_of(dma, struct iomd_dma, dma);  in iomd_free_dma()  local
146 	free_irq(idma->irq, idma);  in iomd_free_dma()
157 	struct iomd_dma *idma = container_of(dma, struct iomd_dma, dma);  in iomd_enable_dma()  local
158 	void __iomem *base = idma->base;  in iomd_enable_dma()
161 	if (idma->dma.invalid) {  in iomd_enable_dma()
162 		idma->dma.invalid = 0;  in iomd_enable_dma()
168 		if (!idma->dma.sg) {  in iomd_enable_dma()
169 			idma->dma.sg = &idma->dma.buf;  in iomd_enable_dma()
170 			idma->dma.sgcount = 1;  in iomd_enable_dma()
171 			idma->dma.buf.length = idma->dma.count;  in iomd_enable_dma()
172 			idma->dma.buf.dma_address = dma_map_single(&isa_dma_dev,  in iomd_enable_dma()
173 				idma->dma.addr, idma->dma.count,  in iomd_enable_dma()
174 				idma->dma.dma_mode == DMA_MODE_READ ?  in iomd_enable_dma()
178 		idma->dma_addr = idma->dma.sg->dma_address;  in iomd_enable_dma()
179 		idma->dma_len = idma->dma.sg->length;  in iomd_enable_dma()
182 		idma->state = DMA_ST_AB;  in iomd_enable_dma()
185 	if (idma->dma.dma_mode == DMA_MODE_READ)  in iomd_enable_dma()
189 	enable_irq(idma->irq);  in iomd_enable_dma()
194 	struct iomd_dma *idma = container_of(dma, struct iomd_dma, dma);  in iomd_disable_dma()  local
195 	void __iomem *base = idma->base;  in iomd_disable_dma()
199 	if (idma->state != ~DMA_ST_AB)  in iomd_disable_dma()
200 		disable_irq(idma->irq);  in iomd_disable_dma()