mips/bmips/dma.c

9 #define pr_fmt(fmt)		"bmips-dma: " fmt
12 #include <linux/dma-direction.h>
13 #include <linux/dma-mapping.h>
24  * peripherals' DMA addresses to be different from the Zephyr-visible
27  * If the "brcm,ubus" node has a "dma-ranges" property we will enable this
29  * very limited subset of "dma-ranges" support and it will probably be
47 	for (r = bmips_dma_ranges; r && r->size; r++) {  in phys_to_dma()
48 		if (pa >= r->child_addr &&  in phys_to_dma()
49 		    pa < (r->child_addr + r->size))  in phys_to_dma()
50 			return pa - r->child_addr + r->parent_addr;  in phys_to_dma()
59 	for (r = bmips_dma_ranges; r && r->size; r++) {  in dma_to_phys()
60 		if (dma_addr >= r->parent_addr &&  in dma_to_phys()
61 		    dma_addr < (r->parent_addr + r->size))  in dma_to_phys()
62 			return dma_addr - r->parent_addr + r->child_addr;  in dma_to_phys()
94 	data = of_get_property(np, "dma-ranges", &len);  in bmips_init_dma_ranges()
108 	for (r = bmips_dma_ranges; len; len--, r++) {  in bmips_init_dma_ranges()
109 		r->child_addr = be32_to_cpup(data++);  in bmips_init_dma_ranges()
110 		r->parent_addr = be32_to_cpup(data++);  in bmips_init_dma_ranges()
111 		r->size = be32_to_cpup(data++);  in bmips_init_dma_ranges()
119 	pr_err("error parsing dma-ranges property\n");  in bmips_init_dma_ranges()
121 	return -EINVAL;  in bmips_init_dma_ranges()