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head/sys/x86/x86/busdma_machdep.c
| Show First 20 Lines • Show All 93 Lines • ▼ Show 20 Lines | |||||
| * Return true if a match is made. | * Return true if a match is made. | ||||
| * | * | ||||
| * To find a match walk the chain of bus_dma_tag_t's looking for 'paddr'. | * To find a match walk the chain of bus_dma_tag_t's looking for 'paddr'. | ||||
| * | * | ||||
| * If paddr is within the bounds of the dma tag then call the filter callback | * If paddr is within the bounds of the dma tag then call the filter callback | ||||
| * to check for a match, if there is no filter callback then assume a match. | * to check for a match, if there is no filter callback then assume a match. | ||||
| */ | */ | ||||
| int | int | ||||
| bus_dma_run_filter(struct bus_dma_tag_common *tc, bus_addr_t paddr) | bus_dma_run_filter(struct bus_dma_tag_common *tc, vm_paddr_t paddr) | ||||
| { | { | ||||
| int retval; | int retval; | ||||
| retval = 0; | retval = 0; | ||||
| do { | do { | ||||
| if (((paddr > tc->lowaddr && paddr <= tc->highaddr) || | if ((paddr >= BUS_SPACE_MAXADDR || | ||||
| ((paddr & (tc->alignment - 1)) != 0)) && | (paddr > tc->lowaddr && paddr <= tc->highaddr) || | ||||
| (paddr & (tc->alignment - 1)) != 0) && | |||||
| (tc->filter == NULL || | (tc->filter == NULL || | ||||
| (*tc->filter)(tc->filterarg, paddr) != 0)) | (*tc->filter)(tc->filterarg, paddr) != 0)) | ||||
| retval = 1; | retval = 1; | ||||
| tc = tc->parent; | tc = tc->parent; | ||||
| } while (retval == 0 && tc != NULL); | } while (retval == 0 && tc != NULL); | ||||
| return (retval); | return (retval); | ||||
| } | } | ||||
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