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Use atomic operations to increment and decrement the refcount

Browse source 
in busdma tags.  There are currently no tags shared accross
different drivers so this isn't needed at the moment, but it
will be required when we'll have a proper newbus method to get
the parent busdma tag.
This commit is contained in:
Maxime Henrion 2003-03-20 19:45:26 +00:00
parent b79b44a90f
commit fd1b2ab0c9
6 changed files with 23 additions and 22 deletions
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8
sys/alpha/alpha/busdma_machdep.c
View file

@ -42,6 +42,7 @@
#include <vm/vm_page.h>
#include <vm/vm_map.h>
#include <machine/atomic.h>
#include <machine/bus.h>
#include <machine/sgmap.h>
#include <machine/md_var.h>
@ -179,9 +180,8 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
newtag->filterarg = parent->filterarg;
newtag->parent = parent->parent;
}
if (newtag->parent != NULL) {
parent->ref_count++;
}
if (newtag->parent != NULL)
atomic_add_int(&parent->ref_count, 1);
}
if (newtag->lowaddr < ptoa(Maxmem) && (flags & BUS_DMA_ALLOCNOW) != 0) {
@ -228,7 +228,7 @@ bus_dma_tag_destroy(bus_dma_tag_t dmat)
bus_dma_tag_t parent;
parent = dmat->parent;
dmat->ref_count--;
atomic_subtract_int(&dmat->ref_count, 1);
if (dmat->ref_count == 0) {
free(dmat, M_DEVBUF);
}

8
sys/amd64/amd64/busdma_machdep.c
View file

@ -42,6 +42,7 @@
#include <vm/vm_page.h>
#include <vm/vm_map.h>
#include <machine/atomic.h>
#include <machine/bus.h>
#include <machine/md_var.h>
@ -186,9 +187,8 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
newtag->filterarg = parent->filterarg;
newtag->parent = parent->parent;
}
if (newtag->parent != NULL) {
parent->ref_count++;
}
if (newtag->parent != NULL)
atomic_add_int(&parent->ref_count, 1);
}
if (newtag->lowaddr < ptoa(Maxmem) && (flags & BUS_DMA_ALLOCNOW) != 0) {
@ -235,7 +235,7 @@ bus_dma_tag_destroy(bus_dma_tag_t dmat)
bus_dma_tag_t parent;
parent = dmat->parent;
dmat->ref_count--;
atomic_subtract_int(&dmat->ref_count, 1);
if (dmat->ref_count == 0) {
free(dmat, M_DEVBUF);
/*

8
sys/i386/i386/busdma_machdep.c
View file

@ -42,6 +42,7 @@
#include <vm/vm_page.h>
#include <vm/vm_map.h>
#include <machine/atomic.h>
#include <machine/bus.h>
#include <machine/md_var.h>
@ -186,9 +187,8 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
newtag->filterarg = parent->filterarg;
newtag->parent = parent->parent;
}
if (newtag->parent != NULL) {
parent->ref_count++;
}
if (newtag->parent != NULL)
atomic_add_int(&parent->ref_count, 1);
}
if (newtag->lowaddr < ptoa(Maxmem) && (flags & BUS_DMA_ALLOCNOW) != 0) {
@ -235,7 +235,7 @@ bus_dma_tag_destroy(bus_dma_tag_t dmat)
bus_dma_tag_t parent;
parent = dmat->parent;
dmat->ref_count--;
atomic_subtract_int(&dmat->ref_count, 1);
if (dmat->ref_count == 0) {
free(dmat, M_DEVBUF);
/*

8
sys/ia64/ia64/busdma_machdep.c
View file

@ -41,6 +41,7 @@
#include <vm/vm_page.h>
#include <vm/vm_map.h>
#include <machine/atomic.h>
#include <machine/bus.h>
#include <machine/md_var.h>
@ -175,9 +176,8 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
newtag->filterarg = parent->filterarg;
newtag->parent = parent->parent;
}
if (newtag->parent != NULL) {
parent->ref_count++;
}
if (newtag->parent != NULL)
atomic_add_int(&parent->ref_count, 1);
}
if (newtag->lowaddr < ptoa(Maxmem) && (flags & BUS_DMA_ALLOCNOW) != 0) {
@ -224,7 +224,7 @@ bus_dma_tag_destroy(bus_dma_tag_t dmat)
bus_dma_tag_t parent;
parent = dmat->parent;
dmat->ref_count--;
atomic_subtract_int(&dmat->ref_count, 1);
if (dmat->ref_count == 0) {
free(dmat, M_DEVBUF);
}

8
sys/powerpc/powerpc/busdma_machdep.c
View file

@ -51,6 +51,7 @@ static const char rcsid[] =
#include <vm/vm_page.h>
#include <vm/vm_map.h>
#include <machine/atomic.h>
#include <machine/bus.h>
#include <machine/cpufunc.h>
@ -133,9 +134,8 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
newtag->filterarg = parent->filterarg;
newtag->parent = parent->parent;
}
if (newtag->parent != NULL) {
parent->ref_count++;
}
if (newtag->parent != NULL)
atomic_add_int(&parent->ref_count, 1);
}
*dmat = newtag;
@ -154,7 +154,7 @@ bus_dma_tag_destroy(bus_dma_tag_t dmat)
bus_dma_tag_t parent;
parent = dmat->parent;
dmat->ref_count--;
atomic_subtract_int(&dmat->ref_count, 1);
if (dmat->ref_count == 0) {
free(dmat, M_DEVBUF);
/*

5
sys/sparc64/sparc64/bus_machdep.c
View file

@ -128,6 +128,7 @@
#include <vm/vm_map.h>
#include <machine/asi.h>
#include <machine/atomic.h>
#include <machine/bus.h>
#include <machine/bus_private.h>
#include <machine/cache.h>
@ -246,7 +247,7 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
newtag->dt_boundary = ulmin(parent->dt_boundary,
newtag->dt_boundary);
}
newtag->dt_parent->dt_ref_count++;
atomic_add_int(&newtag->dt_parent->dt_ref_count, 1);
*dmat = newtag;
return (0);
@ -262,7 +263,7 @@ bus_dma_tag_destroy(bus_dma_tag_t dmat)
return (EBUSY);
while (dmat != NULL) {
parent = dmat->dt_parent;
dmat->dt_ref_count--;
atomic_subtract_int(&dmat->dt_ref_count, 1);
if (dmat->dt_ref_count == 0) {
free(dmat, M_DEVBUF);
/*