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Add create, destroy and load of memory descriptors.

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This commit is contained in:
marcel 2015-07-03 01:52:22 +00:00
parent c87b25b2ae
commit 33d849db59
4 changed files with 162 additions and 18 deletions
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167
sys/dev/proto/proto_busdma.c
View File

@ -36,11 +36,14 @@ __FBSDID("$FreeBSD$");
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/proc.h>
#include <sys/queue.h>
#include <sys/rman.h>
#include <sys/sbuf.h>
#include <sys/uio.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <dev/proto/proto.h>
#include <dev/proto/proto_dev.h>
@ -48,6 +51,12 @@ __FBSDID("$FreeBSD$");
MALLOC_DEFINE(M_PROTO_BUSDMA, "proto_busdma", "DMA management data");
struct proto_callback_bundle {
struct proto_busdma *busdma;
struct proto_md *md;
struct proto_ioc_busdma *ioc;
};
static int
proto_busdma_tag_create(struct proto_busdma *busdma, struct proto_tag *parent,
struct proto_ioc_busdma *ioc)
@ -129,20 +138,39 @@ proto_busdma_tag_lookup(struct proto_busdma *busdma, u_long key)
return (NULL);
}
static int
proto_busdma_md_destroy_internal(struct proto_busdma *busdma,
struct proto_md *md)
{
LIST_REMOVE(md, mds);
LIST_REMOVE(md, peers);
if (md->physaddr)
bus_dmamap_unload(md->bd_tag, md->bd_map);
if (md->virtaddr != NULL)
bus_dmamem_free(md->bd_tag, md->virtaddr, md->bd_map);
else
bus_dmamap_destroy(md->bd_tag, md->bd_map);
bus_dma_tag_destroy(md->bd_tag);
free(md, M_PROTO_BUSDMA);
return (0);
}
static void
proto_busdma_mem_alloc_callback(void *arg, bus_dma_segment_t *segs, int nseg,
int error)
{
struct proto_ioc_busdma *ioc = arg;
struct proto_callback_bundle *pcb = arg;
ioc->u.mem.bus_nsegs = nseg;
ioc->u.mem.bus_addr = segs[0].ds_addr;
pcb->ioc->u.md.bus_nsegs = nseg;
pcb->ioc->u.md.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)
{
struct proto_callback_bundle pcb;
struct proto_md *md;
int error;
@ -163,8 +191,11 @@ proto_busdma_mem_alloc(struct proto_busdma *busdma, struct proto_tag *tag,
return (error);
}
md->physaddr = pmap_kextract((uintptr_t)(md->virtaddr));
pcb.busdma = busdma;
pcb.md = md;
pcb.ioc = ioc;
error = bus_dmamap_load(md->bd_tag, md->bd_map, md->virtaddr,
tag->maxsz, proto_busdma_mem_alloc_callback, ioc, BUS_DMA_NOWAIT);
tag->maxsz, proto_busdma_mem_alloc_callback, &pcb, BUS_DMA_NOWAIT);
if (error) {
bus_dmamem_free(md->bd_tag, md->virtaddr, md->bd_map);
bus_dma_tag_destroy(md->bd_tag);
@ -173,8 +204,10 @@ proto_busdma_mem_alloc(struct proto_busdma *busdma, struct proto_tag *tag,
}
LIST_INSERT_HEAD(&tag->mds, md, peers);
LIST_INSERT_HEAD(&busdma->mds, md, mds);
ioc->u.mem.phys_nsegs = 1;
ioc->u.mem.phys_addr = md->physaddr;
ioc->u.md.virt_addr = (uintptr_t)md->virtaddr;
ioc->u.md.virt_size = tag->maxsz;
ioc->u.md.phys_nsegs = 1;
ioc->u.md.phys_addr = md->physaddr;
ioc->result = (uintptr_t)(void *)md;
return (0);
}
@ -183,11 +216,93 @@ static int
proto_busdma_mem_free(struct proto_busdma *busdma, struct proto_md *md)
{
LIST_REMOVE(md, mds);
LIST_REMOVE(md, peers);
bus_dmamem_free(md->bd_tag, md->virtaddr, md->bd_map);
bus_dma_tag_destroy(md->bd_tag);
free(md, M_PROTO_BUSDMA);
if (md->virtaddr == NULL)
return (ENXIO);
return (proto_busdma_md_destroy_internal(busdma, md));
}
static int
proto_busdma_md_create(struct proto_busdma *busdma, struct proto_tag *tag,
struct proto_ioc_busdma *ioc)
{
struct proto_md *md;
int error;
md = malloc(sizeof(*md), M_PROTO_BUSDMA, M_WAITOK | M_ZERO);
md->tag = tag;
error = bus_dma_tag_create(busdma->bd_roottag, tag->align, tag->bndry,
tag->maxaddr, BUS_SPACE_MAXADDR, NULL, NULL, tag->maxsz,
tag->nsegs, tag->maxsegsz, 0, NULL, NULL, &md->bd_tag);
if (error) {
free(md, M_PROTO_BUSDMA);
return (error);
}
error = bus_dmamap_create(md->bd_tag, 0, &md->bd_map);
if (error) {
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->result = (uintptr_t)(void *)md;
return (0);
}
static int
proto_busdma_md_destroy(struct proto_busdma *busdma, struct proto_md *md)
{
if (md->virtaddr != NULL)
return (ENXIO);
return (proto_busdma_md_destroy_internal(busdma, md));
}
static void
proto_busdma_md_load_callback(void *arg, bus_dma_segment_t *segs, int nseg,
bus_size_t sz, int error)
{
struct proto_callback_bundle *pcb = arg;
pcb->ioc->u.md.bus_nsegs = nseg;
pcb->ioc->u.md.bus_addr = segs[0].ds_addr;
}
static int
proto_busdma_md_load(struct proto_busdma *busdma, struct proto_md *md,
struct proto_ioc_busdma *ioc, struct thread *td)
{
struct proto_callback_bundle pcb;
struct iovec iov;
struct uio uio;
pmap_t pmap;
int error;
iov.iov_base = (void *)(uintptr_t)ioc->u.md.virt_addr;
iov.iov_len = ioc->u.md.virt_size;
uio.uio_iov = &iov;
uio.uio_iovcnt = 1;
uio.uio_offset = 0;
uio.uio_resid = iov.iov_len;
uio.uio_segflg = UIO_USERSPACE;
uio.uio_rw = UIO_READ;
uio.uio_td = td;
pcb.busdma = busdma;
pcb.md = md;
pcb.ioc = ioc;
error = bus_dmamap_load_uio(md->bd_tag, md->bd_map, &uio,
proto_busdma_md_load_callback, &pcb, BUS_DMA_NOWAIT);
if (error)
return (error);
/* XXX determine *all* physical memory segments */
pmap = vmspace_pmap(td->td_proc->p_vmspace);
md->physaddr = pmap_extract(pmap, ioc->u.md.virt_addr);
ioc->u.md.phys_nsegs = 1; /* XXX */
ioc->u.md.phys_addr = md->physaddr;
return (0);
}
@ -228,7 +343,7 @@ proto_busdma_cleanup(struct proto_softc *sc, struct proto_busdma *busdma)
struct proto_tag *tag, *tag1;
LIST_FOREACH_SAFE(md, &busdma->mds, mds, md1)
proto_busdma_mem_free(busdma, md);
proto_busdma_md_destroy_internal(busdma, md);
LIST_FOREACH_SAFE(tag, &busdma->tags, tags, tag1)
proto_busdma_tag_destroy(busdma, tag);
return (0);
@ -236,7 +351,7 @@ proto_busdma_cleanup(struct proto_softc *sc, struct proto_busdma *busdma)
int
proto_busdma_ioctl(struct proto_softc *sc, struct proto_busdma *busdma,
struct proto_ioc_busdma *ioc)
struct proto_ioc_busdma *ioc, struct thread *td)
{
struct proto_tag *tag;
struct proto_md *md;
@ -265,7 +380,7 @@ proto_busdma_ioctl(struct proto_softc *sc, struct proto_busdma *busdma,
error = proto_busdma_tag_destroy(busdma, tag);
break;
case PROTO_IOC_BUSDMA_MEM_ALLOC:
tag = proto_busdma_tag_lookup(busdma, ioc->u.mem.tag);
tag = proto_busdma_tag_lookup(busdma, ioc->u.md.tag);
if (tag == NULL) {
error = EINVAL;
break;
@ -280,6 +395,30 @@ proto_busdma_ioctl(struct proto_softc *sc, struct proto_busdma *busdma,
}
error = proto_busdma_mem_free(busdma, md);
break;
case PROTO_IOC_BUSDMA_MD_CREATE:
tag = proto_busdma_tag_lookup(busdma, ioc->u.md.tag);
if (tag == NULL) {
error = EINVAL;
break;
}
error = proto_busdma_md_create(busdma, tag, ioc);
break;
case PROTO_IOC_BUSDMA_MD_DESTROY:
md = proto_busdma_md_lookup(busdma, ioc->key);
if (md == NULL) {
error = EINVAL;
break;
}
error = proto_busdma_md_destroy(busdma, md);
break;
case PROTO_IOC_BUSDMA_MD_LOAD:
md = proto_busdma_md_lookup(busdma, ioc->key);
if (md == NULL) {
error = EINVAL;
break;
}
error = proto_busdma_md_load(busdma, md, ioc, td);
break;
default:
error = EINVAL;
break;

2
sys/dev/proto/proto_busdma.h
View File

@ -68,7 +68,7 @@ int proto_busdma_detach(struct proto_softc *, struct proto_busdma *);
int proto_busdma_cleanup(struct proto_softc *, struct proto_busdma *);
int proto_busdma_ioctl(struct proto_softc *, struct proto_busdma *,
struct proto_ioc_busdma *);
struct proto_ioc_busdma *, struct thread *);
int proto_busdma_mmap_allowed(struct proto_busdma *, vm_paddr_t);

2
sys/dev/proto/proto_core.c
View File

@ -396,7 +396,7 @@ proto_ioctl(struct cdev *cdev, u_long cmd, caddr_t data, int fflag,
break;
}
busdma = (struct proto_ioc_busdma *)data;
error = proto_busdma_ioctl(sc, r->r_d.busdma, busdma);
error = proto_busdma_ioctl(sc, r->r_d.busdma, busdma, td);
break;
default:
error = ENOIOCTL;

7
sys/dev/proto/proto_dev.h
View File

@ -47,6 +47,9 @@ struct proto_ioc_busdma {
#define PROTO_IOC_BUSDMA_TAG_DESTROY 3
#define PROTO_IOC_BUSDMA_MEM_ALLOC 10
#define PROTO_IOC_BUSDMA_MEM_FREE 11
#define PROTO_IOC_BUSDMA_MD_CREATE 20
#define PROTO_IOC_BUSDMA_MD_DESTROY 21
#define PROTO_IOC_BUSDMA_MD_LOAD 22
unsigned long key;
union {
struct {
@ -62,11 +65,13 @@ struct proto_ioc_busdma {
struct {
unsigned long tag;
unsigned int flags;
unsigned long virt_addr;
unsigned long virt_size;
unsigned int phys_nsegs;
unsigned long phys_addr;
unsigned long bus_addr;
unsigned int bus_nsegs;
} mem;
} md;
} u;
unsigned long result;
};