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[src/trunk]: src/sys/dev/pci Extend agp_generic_bind_memory with bounds to ch...
details: https://anonhg.NetBSD.org/src/rev/8fdcbbaf40ca
branches: trunk
changeset: 796627:8fdcbbaf40ca
user: riastradh <riastradh%NetBSD.org@localhost>
date: Thu Jun 12 18:33:42 2014 +0000
description:
Extend agp_generic_bind_memory with bounds to check.
New routine agp_generic_bind_memory_bounded.
Use it in agp_i810 to replace the pile of code I wrote as a
replacement which is apparently broken.
diffstat:
sys/dev/pci/agp.c | 20 ++++++--
sys/dev/pci/agp_i810.c | 108 +++---------------------------------------------
sys/dev/pci/agpvar.h | 4 +-
3 files changed, 26 insertions(+), 106 deletions(-)
diffs (224 lines):
diff -r fe6f57fa247e -r 8fdcbbaf40ca sys/dev/pci/agp.c
--- a/sys/dev/pci/agp.c Thu Jun 12 17:23:06 2014 +0000
+++ b/sys/dev/pci/agp.c Thu Jun 12 18:33:42 2014 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: agp.c,v 1.81 2014/03/16 05:20:28 dholland Exp $ */
+/* $NetBSD: agp.c,v 1.82 2014/06/12 18:33:42 riastradh Exp $ */
/*-
* Copyright (c) 2000 Doug Rabson
@@ -65,7 +65,7 @@
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: agp.c,v 1.81 2014/03/16 05:20:28 dholland Exp $");
+__KERNEL_RCSID(0, "$NetBSD: agp.c,v 1.82 2014/06/12 18:33:42 riastradh Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -658,7 +658,16 @@
int
agp_generic_bind_memory(struct agp_softc *sc, struct agp_memory *mem,
- off_t offset)
+ off_t offset)
+{
+
+ return agp_generic_bind_memory_bounded(sc, mem, offset,
+ 0, AGP_GET_APERTURE(sc));
+}
+
+int
+agp_generic_bind_memory_bounded(struct agp_softc *sc, struct agp_memory *mem,
+ off_t offset, off_t start, off_t end)
{
off_t i, k;
bus_size_t done, j;
@@ -675,9 +684,10 @@
return EINVAL;
}
- if (offset < 0
+ if (offset < start
|| (offset & (AGP_PAGE_SIZE - 1)) != 0
- || offset + mem->am_size > AGP_GET_APERTURE(sc)) {
+ || offset > end
+ || mem->am_size > (end - offset)) {
aprint_error_dev(sc->as_dev,
"binding memory at bad offset %#lx\n",
(unsigned long) offset);
diff -r fe6f57fa247e -r 8fdcbbaf40ca sys/dev/pci/agp_i810.c
--- a/sys/dev/pci/agp_i810.c Thu Jun 12 17:23:06 2014 +0000
+++ b/sys/dev/pci/agp_i810.c Thu Jun 12 18:33:42 2014 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: agp_i810.c,v 1.100 2014/06/12 17:04:58 riastradh Exp $ */
+/* $NetBSD: agp_i810.c,v 1.101 2014/06/12 18:33:42 riastradh Exp $ */
/*-
* Copyright (c) 2000 Doug Rabson
@@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: agp_i810.c,v 1.100 2014/06/12 17:04:58 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: agp_i810.c,v 1.101 2014/06/12 18:33:42 riastradh Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -85,8 +85,6 @@
static int agp_i810_free_memory(struct agp_softc *, struct agp_memory *);
static int agp_i810_bind_memory(struct agp_softc *, struct agp_memory *,
off_t);
-static int agp_i810_bind_memory_main(struct agp_softc *, struct agp_memory *,
- off_t);
static int agp_i810_bind_memory_dcache(struct agp_softc *, struct agp_memory *,
off_t);
static int agp_i810_bind_memory_hwcursor(struct agp_softc *,
@@ -1149,6 +1147,9 @@
KASSERT(sc->as_allocated <= sc->as_maxmem);
if (size > (sc->as_maxmem - sc->as_allocated))
return NULL;
+ if (size > ((isc->gtt_size/4) << AGP_PAGE_SHIFT))
+ return NULL;
+
switch (type) {
case AGP_I810_MEMTYPE_MAIN:
break;
@@ -1265,8 +1266,8 @@
switch (mem->am_type) {
case AGP_I810_MEMTYPE_MAIN:
- error = agp_i810_bind_memory_main(sc, mem, offset);
- break;
+ return agp_generic_bind_memory_bounded(sc, mem, offset,
+ 0, (isc->gtt_size/4) << AGP_PAGE_SHIFT);
case AGP_I810_MEMTYPE_DCACHE:
error = agp_i810_bind_memory_dcache(sc, mem, offset);
break;
@@ -1284,93 +1285,6 @@
return 0;
}
-static int
-agp_i810_bind_memory_main(struct agp_softc *sc, struct agp_memory *mem,
- off_t offset)
-{
- struct agp_i810_softc *const isc = sc->as_chipc;
- int nseg;
- uint32_t i, j;
- unsigned seg;
- bus_addr_t addr;
- bus_size_t len;
- int error;
-
- /* Ensure we have a sane size/offset that will fit. */
- if (offset < 0)
- return EINVAL;
- if (offset & (AGP_PAGE_SIZE - 1))
- return EINVAL;
- if (mem->am_size > ((isc->gtt_size/4) << AGP_PAGE_SHIFT))
- return EINVAL;
- if (offset > (((isc->gtt_size/4) << AGP_PAGE_SHIFT) -
- mem->am_size))
- return EINVAL;
-
- /* Allocate an array of DMA segments. */
- nseg = (mem->am_size >> AGP_PAGE_SHIFT);
- if (nseg > (SIZE_MAX / sizeof(*mem->am_dmaseg))) {
- error = ENOMEM;
- goto fail0;
- }
- mem->am_dmaseg = malloc(nseg*sizeof(*mem->am_dmaseg), M_AGP, M_WAITOK);
-
- /* Allocate DMA-safe physical segments. */
- error = bus_dmamem_alloc(sc->as_dmat, mem->am_size, PAGE_SIZE,
- 0, mem->am_dmaseg, nseg, &mem->am_nseg, BUS_DMA_WAITOK);
- if (error)
- goto fail1;
- KASSERT(mem->am_nseg <= nseg);
-
- /* Shrink the array of DMA segments if we can. */
- if (mem->am_nseg < nseg) {
- mem->am_dmaseg = realloc(mem->am_dmaseg, mem->am_nseg, M_AGP,
- M_WAITOK);
- nseg = mem->am_nseg;
- }
-
- /* Load the DMA map. */
- error = bus_dmamap_load_raw(sc->as_dmat, mem->am_dmamap,
- mem->am_dmaseg, mem->am_nseg, mem->am_size, BUS_DMA_WAITOK);
- if (error)
- goto fail2;
-
- /* Bind the pages in the GTT. */
- i = 0;
- KASSERT((mem->am_size & (AGP_PAGE_SIZE - 1)) == 0);
- for (seg = 0; seg < mem->am_dmamap->dm_nsegs; seg++) {
- KASSERT((offset + i) < mem->am_size);
- addr = mem->am_dmamap->dm_segs[seg].ds_addr;
- len = MIN(mem->am_dmamap->dm_segs[seg].ds_len,
- (mem->am_size - (offset + i)));
- do {
- KASSERT(0 < len);
- KASSERT((len & (AGP_PAGE_SIZE - 1)) == 0);
- KASSERT((offset + i) <= (mem->am_size - len));
- error = agp_i810_bind_page(sc, offset + i, addr);
- if (error)
- goto fail3;
- i += AGP_PAGE_SIZE;
- addr += AGP_PAGE_SIZE;
- len -= AGP_PAGE_SIZE;
- } while (0 < len);
- }
-
- /* Success! */
- mem->am_offset = offset;
- return 0;
-
-fail3: for (j = 0; j < i; j += AGP_PAGE_SIZE)
- (void)agp_i810_unbind_page(sc, offset + j);
- bus_dmamap_unload(sc->as_dmat, mem->am_dmamap);
-fail2: bus_dmamem_free(sc->as_dmat, mem->am_dmaseg, mem->am_nseg);
-fail1: free(mem->am_dmaseg, M_AGP);
- mem->am_dmaseg = NULL;
- mem->am_nseg = 0;
-fail0: KASSERT(error);
- return error;
-}
-
#define I810_GTT_PTE_VALID 0x01
#define I810_GTT_PTE_DCACHE 0x02
@@ -1436,13 +1350,7 @@
switch (mem->am_type) {
case AGP_I810_MEMTYPE_MAIN:
- for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
- (void)agp_i810_unbind_page(sc, mem->am_offset + i);
- bus_dmamap_unload(sc->as_dmat, mem->am_dmamap);
- bus_dmamem_free(sc->as_dmat, mem->am_dmaseg, mem->am_nseg);
- free(mem->am_dmaseg, M_AGP);
- mem->am_offset = 0;
- break;
+ return agp_generic_unbind_memory(sc, mem);
case AGP_I810_MEMTYPE_DCACHE:
KASSERT(isc->chiptype == CHIP_I810);
for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
diff -r fe6f57fa247e -r 8fdcbbaf40ca sys/dev/pci/agpvar.h
--- a/sys/dev/pci/agpvar.h Thu Jun 12 17:23:06 2014 +0000
+++ b/sys/dev/pci/agpvar.h Thu Jun 12 18:33:42 2014 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: agpvar.h,v 1.19 2014/06/12 15:05:29 riastradh Exp $ */
+/* $NetBSD: agpvar.h,v 1.20 2014/06/12 18:33:42 riastradh Exp $ */
/*-
* Copyright (c) 2000 Doug Rabson
@@ -177,6 +177,8 @@
struct agp_memory *agp_generic_alloc_memory(struct agp_softc *, int, vsize_t);
int agp_generic_free_memory(struct agp_softc *, struct agp_memory *);
int agp_generic_bind_memory(struct agp_softc *, struct agp_memory *, off_t);
+int agp_generic_bind_memory_bounded(struct agp_softc *, struct agp_memory *,
+ off_t, off_t, off_t);
int agp_generic_unbind_memory(struct agp_softc *, struct agp_memory *);
/* The vendor has already been matched when these functions are called */
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