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Load the allocated memory and return both the physical

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address and the bus address to the application.
This commit is contained in:
Marcel Moolenaar 2015-06-10 22:33:56 +00:00
parent cad814eedf
commit 90a1793cce
2 changed files with 24 additions and 4 deletions
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22
sys/dev/proto/proto_busdma.c
View File

@ -129,6 +129,16 @@ proto_busdma_tag_lookup(struct proto_busdma *busdma, u_long key)
return (NULL);
}
static void
proto_busdma_mem_alloc_callback(void *arg, bus_dma_segment_t *segs, int nseg,
int error)
{
struct proto_ioc_busdma *ioc = arg;
ioc->u.mem.bus_nsegs = nseg;
ioc->u.mem.bus_addr = segs[0].ds_addr;
}
static int
proto_busdma_mem_alloc(struct proto_busdma *busdma, struct proto_tag *tag,
struct proto_ioc_busdma *ioc)
@ -153,10 +163,18 @@ proto_busdma_mem_alloc(struct proto_busdma *busdma, struct proto_tag *tag,
return (error);
}
md->physaddr = pmap_kextract((uintptr_t)(md->virtaddr));
error = bus_dmamap_load(md->bd_tag, md->bd_map, md->virtaddr,
tag->maxsz, proto_busdma_mem_alloc_callback, ioc, BUS_DMA_NOWAIT);
if (error) {
bus_dmamem_free(md->bd_tag, md->virtaddr, md->bd_map);
bus_dma_tag_destroy(md->bd_tag);
free(md, M_PROTO_BUSDMA);
return (error);
}
LIST_INSERT_HEAD(&tag->mds, md, peers);
LIST_INSERT_HEAD(&busdma->mds, md, mds);
ioc->u.mem.nsegs = 1;
ioc->u.mem.physaddr = md->physaddr;
ioc->u.mem.phys_nsegs = 1;
ioc->u.mem.phys_addr = md->physaddr;
ioc->result = (uintptr_t)(void *)md;
return (0);
}

6
sys/dev/proto/proto_dev.h
View File

@ -62,8 +62,10 @@ struct proto_ioc_busdma {
struct {
unsigned long tag;
unsigned int flags;
unsigned int nsegs;
unsigned long physaddr;
unsigned int phys_nsegs;
unsigned long phys_addr;
unsigned long bus_addr;
unsigned int bus_nsegs;
} mem;
} u;
unsigned long result;