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Code Issues Releases Activity

MFi386:

Browse Source 
rev 1.61 (scottl):  Add KTR tracing
rev 1.62 (scottl):  Optimize (td->pmap, inlines, etc)
This commit is contained in:
Peter Wemm 2004-11-05 18:24:01 +00:00
parent 9bb09163fc
commit 7681443a26
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=137261
1 changed files with 79 additions and 28 deletions
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107
sys/amd64/amd64/busdma_machdep.c
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@ -33,12 +33,14 @@ __FBSDID("$FreeBSD$");
#include <sys/bus.h>
#include <sys/interrupt.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/lock.h>
#include <sys/proc.h>
#include <sys/mutex.h>
#include <sys/mbuf.h>
#include <sys/uio.h>
#include <sys/sysctl.h>
#include <sys/ktr.h>
#include <vm/vm.h>
#include <vm/vm_page.h>
@ -218,8 +220,11 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
*dmat = NULL;
newtag = (bus_dma_tag_t)malloc(sizeof(*newtag), M_DEVBUF, M_NOWAIT);
if (newtag == NULL)
if (newtag == NULL) {
CTR3(KTR_BUSDMA, "bus_dma_tag_create returned tag %p tag "
"flags 0x%x error %d", newtag, 0, error);
return (ENOMEM);
}
newtag->parent = parent;
newtag->alignment = alignment;
@ -296,16 +301,26 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
} else {
*dmat = newtag;
}
CTR3(KTR_BUSDMA, "bus_dma_tag_create returned tag %p tag flags 0x%x "
"error %d", newtag, (newtag != NULL ? newtag->flags : 0), error);
return (error);
}
int
bus_dma_tag_destroy(bus_dma_tag_t dmat)
{
bus_dma_tag_t dmat_copy;
int error;
error = 0;
dmat_copy = dmat;
if (dmat != NULL) {
if (dmat->map_count != 0)
return (EBUSY);
if (dmat->map_count != 0) {
error = EBUSY;
goto out;
}
while (dmat != NULL) {
bus_dma_tag_t parent;
@ -326,7 +341,10 @@ bus_dma_tag_destroy(bus_dma_tag_t dmat)
dmat = NULL;
}
}
return (0);
out:
CTR2(KTR_BUSDMA, "bus_dma_tag_destroy tag %p error %d", dmat_copy,
error);
return (error);
}
/*
@ -344,8 +362,11 @@ bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp)
dmat->segments = (bus_dma_segment_t *)malloc(
sizeof(bus_dma_segment_t) * dmat->nsegments, M_DEVBUF,
M_NOWAIT);
if (dmat->segments == NULL)
if (dmat->segments == NULL) {
CTR2(KTR_BUSDMA, "bus_dmamap_create: tag %p error %d",
dmat, ENOMEM);
return (ENOMEM);
}
}
/*
@ -360,8 +381,11 @@ bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp)
*mapp = (bus_dmamap_t)malloc(sizeof(**mapp), M_DEVBUF,
M_NOWAIT | M_ZERO);
if (*mapp == NULL)
if (*mapp == NULL) {
CTR2(KTR_BUSDMA, "bus_dmamap_create: tag %p error %d",
dmat, ENOMEM);
return (ENOMEM);
}
/* Initialize the new map */
STAILQ_INIT(&((*mapp)->bpages));
@ -400,6 +424,8 @@ bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp)
}
if (error == 0)
dmat->map_count++;
CTR3(KTR_BUSDMA, "bus_dmamap_create: tag %p tag flags 0x%x error %d",
dmat, dmat->flags, error);
return (error);
}
@ -411,11 +437,15 @@ int
bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map)
{
if (map != NULL && map != &nobounce_dmamap) {
if (STAILQ_FIRST(&map->bpages) != NULL)
if (STAILQ_FIRST(&map->bpages) != NULL) {
CTR2(KTR_BUSDMA, "bus_dmamap_destroy: tag %p error %d",
dmat, EBUSY);
return (EBUSY);
}
free(map, M_DEVBUF);
}
dmat->map_count--;
CTR1(KTR_BUSDMA, "bus_dmamap_destroy: tag %p error 0", dmat);
return (0);
}
@ -445,8 +475,11 @@ bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags,
dmat->segments = (bus_dma_segment_t *)malloc(
sizeof(bus_dma_segment_t) * dmat->nsegments, M_DEVBUF,
M_NOWAIT);
if (dmat->segments == NULL)
if (dmat->segments == NULL) {
CTR3(KTR_BUSDMA, "bus_dmamem_alloc: tag %p tag "
"flags 0x%x error %d", dmat, dmat->flags, ENOMEM);
return (ENOMEM);
}
}
if ((dmat->maxsize <= PAGE_SIZE) &&
@ -463,8 +496,13 @@ bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags,
0ul, dmat->lowaddr, dmat->alignment? dmat->alignment : 1ul,
dmat->boundary);
}
if (*vaddr == NULL)
if (*vaddr == NULL) {
CTR3(KTR_BUSDMA, "bus_dmamem_alloc: tag %p tag flags 0x%x "
"error %d", dmat, dmat->flags, ENOMEM);
return (ENOMEM);
}
CTR3(KTR_BUSDMA, "bus_dmamem_alloc: tag %p tag flags 0x%x error %d",
dmat, dmat->flags, ENOMEM);
return (0);
}
@ -487,6 +525,8 @@ bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map)
else {
contigfree(vaddr, dmat->maxsize, M_DEVBUF);
}
CTR2(KTR_BUSDMA, "bus_dmamem_free: tag %p flags 0x%x", dmat,
dmat->flags);
}
/*
@ -495,11 +535,11 @@ bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map)
* the starting segment on entrace, and the ending segment on exit.
* first indicates if this is the first invocation of this function.
*/
static int
static __inline int
_bus_dmamap_load_buffer(bus_dma_tag_t dmat,
bus_dmamap_t map,
void *buf, bus_size_t buflen,
struct thread *td,
pmap_t pmap,
int flags,
bus_addr_t *lastaddrp,
int *segp,
@ -512,23 +552,22 @@ _bus_dmamap_load_buffer(bus_dma_tag_t dmat,
bus_addr_t paddr;
int needbounce = 0;
int seg;
pmap_t pmap;
segs = dmat->segments;
if (map == NULL)
map = &nobounce_dmamap;
if (td != NULL)
pmap = vmspace_pmap(td->td_proc->p_vmspace);
else
pmap = NULL;
if ((dmat->lowaddr < ptoa((vm_paddr_t)Maxmem)
|| dmat->boundary > 0 || dmat->alignment > 1)
&& map != &nobounce_dmamap && map->pagesneeded == 0) {
if ((map != &nobounce_dmamap && map->pagesneeded == 0)
&& (dmat->lowaddr < ptoa((vm_paddr_t)Maxmem)
|| dmat->boundary > 0 || dmat->alignment > 1)) {
vm_offset_t vendaddr;
CTR4(KTR_BUSDMA, "lowaddr= %d Maxmem= %d, boundary= %d, "
"alignment= %d", dmat->lowaddr, ptoa((vm_paddr_t)Maxmem),
dmat->boundary, dmat->alignment);
CTR3(KTR_BUSDMA, "map= %p, nobouncemap= %p, pagesneeded= %d",
map, &nobounce_dmamap, map->pagesneeded);
/*
* Count the number of bounce pages
* needed in order to complete this transfer
@ -544,10 +583,9 @@ _bus_dmamap_load_buffer(bus_dma_tag_t dmat,
}
vaddr += PAGE_SIZE;
}
CTR1(KTR_BUSDMA, "pagesneeded= %d\n", map->pagesneeded);
}
vaddr = (vm_offset_t)buf;
/* Reserve Necessary Bounce Pages */
if (map->pagesneeded != 0) {
mtx_lock(&bounce_lock);
@ -571,6 +609,7 @@ _bus_dmamap_load_buffer(bus_dma_tag_t dmat,
mtx_unlock(&bounce_lock);
}
vaddr = (vm_offset_t)buf;
lastaddr = *lastaddrp;
bmask = ~(dmat->boundary - 1);
@ -658,14 +697,19 @@ bus_dmamap_load(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf,
error = _bus_dmamap_load_buffer(dmat, map, buf, buflen, NULL, flags,
&lastaddr, &nsegs, 1);
if (error == EINPROGRESS)
if (error == EINPROGRESS) {
CTR3(KTR_BUSDMA, "bus_dmamap_load: tag %p tag flags 0x%x "
"error %d", dmat, dmat->flags, error);
return (error);
}
if (error)
(*callback)(callback_arg, dmat->segments, 0, error);
else
(*callback)(callback_arg, dmat->segments, nsegs + 1, 0);
CTR2(KTR_BUSDMA, "bus_dmamap_load: tag %p tag flags 0x%x error 0",
dmat, dmat->flags);
return (0);
}
@ -711,6 +755,8 @@ bus_dmamap_load_mbuf(bus_dma_tag_t dmat, bus_dmamap_t map,
(*callback)(callback_arg, dmat->segments,
nsegs+1, m0->m_pkthdr.len, error);
}
CTR3(KTR_BUSDMA, "bus_dmamap_load_mbuf: tag %p tag flags 0x%x "
"error %d", dmat, dmat->flags, error);
return (error);
}
@ -727,17 +773,18 @@ bus_dmamap_load_uio(bus_dma_tag_t dmat, bus_dmamap_t map,
int nsegs, error, first, i;
bus_size_t resid;
struct iovec *iov;
struct thread *td = NULL;
pmap_t pmap;
flags |= BUS_DMA_NOWAIT;
resid = uio->uio_resid;
iov = uio->uio_iov;
if (uio->uio_segflg == UIO_USERSPACE) {
td = uio->uio_td;
KASSERT(td != NULL,
KASSERT(uio->uio_td != NULL,
("bus_dmamap_load_uio: USERSPACE but no proc"));
}
pmap = vmspace_pmap(uio->uio_td->td_proc->p_vmspace);
} else
pmap = NULL;
nsegs = 0;
error = 0;
@ -754,7 +801,7 @@ bus_dmamap_load_uio(bus_dma_tag_t dmat, bus_dmamap_t map,
if (minlen > 0) {
error = _bus_dmamap_load_buffer(dmat, map,
addr, minlen,
td, flags, &lastaddr, &nsegs, first);
pmap, flags, &lastaddr, &nsegs, first);
first = 0;
resid -= minlen;
@ -768,6 +815,8 @@ bus_dmamap_load_uio(bus_dma_tag_t dmat, bus_dmamap_t map,
(*callback)(callback_arg, dmat->segments,
nsegs+1, uio->uio_resid, error);
}
CTR3(KTR_BUSDMA, "bus_dmamap_load_uio: tag %p tag flags 0x%x "
"error %d", dmat, dmat->flags, error);
return (error);
}
@ -797,6 +846,8 @@ _bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op)
* the caches on broken hardware
*/
total_bounced++;
CTR3(KTR_BUSDMA, "_bus_dmamap_sync: tag %p tag flags 0x%x "
"op 0x%x performing bounce", op, dmat, dmat->flags);
if (op & BUS_DMASYNC_PREWRITE) {
while (bpage != NULL) {