13 static int addr_aligned(struct bounce_buffer *state)  in addr_aligned()  argument
18 	if ((ulong)state->user_buffer & align_mask) {  in addr_aligned()
19 		debug("Unaligned buffer address %p\n", state->user_buffer);  in addr_aligned()
24 	if (state->len != state->len_aligned) {  in addr_aligned()
25 		debug("Unaligned buffer length %zu\n", state->len);  in addr_aligned()
33 int bounce_buffer_start(struct bounce_buffer *state, void *data,  in bounce_buffer_start()  argument
36 	state->user_buffer = data;  in bounce_buffer_start()
37 	state->bounce_buffer = data;  in bounce_buffer_start()
38 	state->len = len;  in bounce_buffer_start()
39 	state->len_aligned = roundup(len, ARCH_DMA_MINALIGN);  in bounce_buffer_start()
40 	state->flags = flags;  in bounce_buffer_start()
42 	if (!addr_aligned(state)) {  in bounce_buffer_start()
43 		state->bounce_buffer = memalign(ARCH_DMA_MINALIGN,  in bounce_buffer_start()
44 						state->len_aligned);  in bounce_buffer_start()
45 		if (!state->bounce_buffer)  in bounce_buffer_start()
48 		if (state->flags & GEN_BB_READ)  in bounce_buffer_start()
49 			memcpy(state->bounce_buffer, state->user_buffer,  in bounce_buffer_start()
50 				state->len);  in bounce_buffer_start()
57 	flush_dcache_range((unsigned long)state->bounce_buffer,  in bounce_buffer_start()
58 				(unsigned long)(state->bounce_buffer) +  in bounce_buffer_start()
59 					state->len_aligned);  in bounce_buffer_start()
64 int bounce_buffer_stop(struct bounce_buffer *state)  in bounce_buffer_stop()  argument
66 	if (state->flags & GEN_BB_WRITE) {  in bounce_buffer_stop()
68 		invalidate_dcache_range((unsigned long)state->bounce_buffer,  in bounce_buffer_stop()
69 					(unsigned long)(state->bounce_buffer) +  in bounce_buffer_stop()
70 						state->len_aligned);  in bounce_buffer_stop()
73 	if (state->bounce_buffer == state->user_buffer)  in bounce_buffer_stop()
76 	if (state->flags & GEN_BB_WRITE)  in bounce_buffer_stop()
77 		memcpy(state->user_buffer, state->bounce_buffer, state->len);  in bounce_buffer_stop()
79 	free(state->bounce_buffer);  in bounce_buffer_stop()