35 #define RISC_INSTR(risc_pos, opcode)	(mantis->risc_cpu[risc_pos++] = cpu_to_le32(opcode))
46 int mantis_dma_exit(struct mantis_pci *mantis)  in mantis_dma_exit()  argument
48 	if (mantis->buf_cpu) {  in mantis_dma_exit()
51 			(unsigned long) mantis->buf_dma,  in mantis_dma_exit()
52 			 mantis->buf_cpu,  in mantis_dma_exit()
55 		dma_free_coherent(&mantis->pdev->dev, MANTIS_BUF_SIZE,  in mantis_dma_exit()
56 				  mantis->buf_cpu, mantis->buf_dma);  in mantis_dma_exit()
58 		mantis->buf_cpu = NULL;  in mantis_dma_exit()
60 	if (mantis->risc_cpu) {  in mantis_dma_exit()
63 			(unsigned long) mantis->risc_dma,  in mantis_dma_exit()
64 			mantis->risc_cpu,  in mantis_dma_exit()
67 		dma_free_coherent(&mantis->pdev->dev, MANTIS_RISC_SIZE,  in mantis_dma_exit()
68 				  mantis->risc_cpu, mantis->risc_dma);  in mantis_dma_exit()
70 		mantis->risc_cpu = NULL;  in mantis_dma_exit()
77 static inline int mantis_alloc_buffers(struct mantis_pci *mantis)  in mantis_alloc_buffers()  argument
79 	if (!mantis->buf_cpu) {  in mantis_alloc_buffers()
80 		mantis->buf_cpu = dma_alloc_coherent(&mantis->pdev->dev,  in mantis_alloc_buffers()
82 						     &mantis->buf_dma, GFP_KERNEL);  in mantis_alloc_buffers()
83 		if (!mantis->buf_cpu) {  in mantis_alloc_buffers()
91 			(unsigned long) mantis->buf_dma,  in mantis_alloc_buffers()
92 			mantis->buf_cpu, MANTIS_BUF_SIZE);  in mantis_alloc_buffers()
94 	if (!mantis->risc_cpu) {  in mantis_alloc_buffers()
95 		mantis->risc_cpu = dma_alloc_coherent(&mantis->pdev->dev,  in mantis_alloc_buffers()
97 						      &mantis->risc_dma, GFP_KERNEL);  in mantis_alloc_buffers()
99 		if (!mantis->risc_cpu) {  in mantis_alloc_buffers()
103 			mantis_dma_exit(mantis);  in mantis_alloc_buffers()
109 			(unsigned long) mantis->risc_dma,  in mantis_alloc_buffers()
110 			mantis->risc_cpu, MANTIS_RISC_SIZE);  in mantis_alloc_buffers()
119 int mantis_dma_init(struct mantis_pci *mantis)  in mantis_dma_init()  argument
124 	err = mantis_alloc_buffers(mantis);  in mantis_dma_init()
138 static inline void mantis_risc_program(struct mantis_pci *mantis)  in mantis_risc_program()  argument
161 			RISC_INSTR(risc_pos, mantis->buf_dma + buf_pos);  in mantis_risc_program()
166 	RISC_INSTR(risc_pos, mantis->risc_dma);  in mantis_risc_program()
169 void mantis_dma_start(struct mantis_pci *mantis)  in mantis_dma_start()  argument
173 	mantis_risc_program(mantis);  in mantis_dma_start()
174 	mmwrite(mantis->risc_dma, MANTIS_RISC_START);  in mantis_dma_start()
178 	mantis->last_block = mantis->busy_block = 0;  in mantis_dma_start()
180 	mantis_unmask_ints(mantis, MANTIS_INT_RISCI);  in mantis_dma_start()
187 void mantis_dma_stop(struct mantis_pci *mantis)  in mantis_dma_stop()  argument
199 	mantis_mask_ints(mantis, MANTIS_INT_RISCI | MANTIS_INT_RISCEN);  in mantis_dma_stop()
205 	struct mantis_pci *mantis = from_tasklet(mantis, t, tasklet);  in mantis_dma_xfer()  local
206 	struct mantis_hwconfig *config = mantis->hwconfig;  in mantis_dma_xfer()
208 	while (mantis->last_block != mantis->busy_block) {  in mantis_dma_xfer()
210 			mantis->last_block, mantis->busy_block);  in mantis_dma_xfer()
213 		(&mantis->demux, &mantis->buf_cpu[mantis->last_block * MANTIS_BLOCK_BYTES], MANTIS_BLOCK_BYTES);  in mantis_dma_xfer()
214 		mantis->last_block = (mantis->last_block + 1) % MANTIS_BLOCK_COUNT;  in mantis_dma_xfer()