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path: root/drivers/infiniband/hw/ipath/ipath_file_ops.c
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Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_file_ops.c')
-rw-r--r--drivers/infiniband/hw/ipath/ipath_file_ops.c88
1 files changed, 46 insertions, 42 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_file_ops.c b/drivers/infiniband/hw/ipath/ipath_file_ops.c
index 5de1dd49722..a1cfedf8fb1 100644
--- a/drivers/infiniband/hw/ipath/ipath_file_ops.c
+++ b/drivers/infiniband/hw/ipath/ipath_file_ops.c
@@ -41,12 +41,6 @@
#include "ipath_kernel.h"
#include "ipath_common.h"
-/*
- * mmap64 doesn't allow all 64 bits for 32-bit applications
- * so only use the low 43 bits.
- */
-#define MMAP64_MASK 0x7FFFFFFFFFFUL
-
static int ipath_open(struct inode *, struct file *);
static int ipath_close(struct inode *, struct file *);
static ssize_t ipath_write(struct file *, const char __user *, size_t,
@@ -63,6 +57,24 @@ static const struct file_operations ipath_file_ops = {
.mmap = ipath_mmap
};
+/*
+ * Convert kernel virtual addresses to physical addresses so they don't
+ * potentially conflict with the chip addresses used as mmap offsets.
+ * It doesn't really matter what mmap offset we use as long as we can
+ * interpret it correctly.
+ */
+static u64 cvt_kvaddr(void *p)
+{
+ struct page *page;
+ u64 paddr = 0;
+
+ page = vmalloc_to_page(p);
+ if (page)
+ paddr = page_to_pfn(page) << PAGE_SHIFT;
+
+ return paddr;
+}
+
static int ipath_get_base_info(struct file *fp,
void __user *ubase, size_t ubase_size)
{
@@ -173,15 +185,14 @@ static int ipath_get_base_info(struct file *fp,
kinfo->spi_piocnt = dd->ipath_pbufsport / subport_cnt;
kinfo->spi_piobufbase = (u64) pd->port_piobufs +
dd->ipath_palign * kinfo->spi_piocnt * slave;
- kinfo->__spi_uregbase = ((u64) pd->subport_uregbase +
- PAGE_SIZE * slave) & MMAP64_MASK;
+ kinfo->__spi_uregbase = cvt_kvaddr(pd->subport_uregbase +
+ PAGE_SIZE * slave);
- kinfo->spi_rcvhdr_base = ((u64) pd->subport_rcvhdr_base +
- pd->port_rcvhdrq_size * slave) & MMAP64_MASK;
+ kinfo->spi_rcvhdr_base = cvt_kvaddr(pd->subport_rcvhdr_base +
+ pd->port_rcvhdrq_size * slave);
kinfo->spi_rcvhdr_tailaddr = 0;
- kinfo->spi_rcv_egrbufs = ((u64) pd->subport_rcvegrbuf +
- dd->ipath_rcvegrcnt * dd->ipath_rcvegrbufsize * slave) &
- MMAP64_MASK;
+ kinfo->spi_rcv_egrbufs = cvt_kvaddr(pd->subport_rcvegrbuf +
+ dd->ipath_rcvegrcnt * dd->ipath_rcvegrbufsize * slave);
}
kinfo->spi_pioindex = (kinfo->spi_piobufbase - dd->ipath_piobufbase) /
@@ -199,11 +210,11 @@ static int ipath_get_base_info(struct file *fp,
if (master) {
kinfo->spi_runtime_flags |= IPATH_RUNTIME_MASTER;
kinfo->spi_subport_uregbase =
- (u64) pd->subport_uregbase & MMAP64_MASK;
+ cvt_kvaddr(pd->subport_uregbase);
kinfo->spi_subport_rcvegrbuf =
- (u64) pd->subport_rcvegrbuf & MMAP64_MASK;
+ cvt_kvaddr(pd->subport_rcvegrbuf);
kinfo->spi_subport_rcvhdr_base =
- (u64) pd->subport_rcvhdr_base & MMAP64_MASK;
+ cvt_kvaddr(pd->subport_rcvhdr_base);
ipath_cdbg(PROC, "port %u flags %x %llx %llx %llx\n",
kinfo->spi_port, kinfo->spi_runtime_flags,
(unsigned long long) kinfo->spi_subport_uregbase,
@@ -1131,13 +1142,11 @@ static int mmap_kvaddr(struct vm_area_struct *vma, u64 pgaddr,
struct ipath_devdata *dd;
void *addr;
size_t size;
- int ret;
+ int ret = 0;
/* If the port is not shared, all addresses should be physical */
- if (!pd->port_subport_cnt) {
- ret = -EINVAL;
+ if (!pd->port_subport_cnt)
goto bail;
- }
dd = pd->port_dd;
size = pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size;
@@ -1149,33 +1158,28 @@ static int mmap_kvaddr(struct vm_area_struct *vma, u64 pgaddr,
if (subport == 0) {
unsigned num_slaves = pd->port_subport_cnt - 1;
- if (pgaddr == ((u64) pd->subport_uregbase & MMAP64_MASK)) {
+ if (pgaddr == cvt_kvaddr(pd->subport_uregbase)) {
addr = pd->subport_uregbase;
size = PAGE_SIZE * num_slaves;
- } else if (pgaddr == ((u64) pd->subport_rcvhdr_base &
- MMAP64_MASK)) {
+ } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base)) {
addr = pd->subport_rcvhdr_base;
size = pd->port_rcvhdrq_size * num_slaves;
- } else if (pgaddr == ((u64) pd->subport_rcvegrbuf &
- MMAP64_MASK)) {
+ } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf)) {
addr = pd->subport_rcvegrbuf;
size *= num_slaves;
- } else {
- ret = -EINVAL;
+ } else
goto bail;
- }
- } else if (pgaddr == (((u64) pd->subport_uregbase +
- PAGE_SIZE * (subport - 1)) & MMAP64_MASK)) {
+ } else if (pgaddr == cvt_kvaddr(pd->subport_uregbase +
+ PAGE_SIZE * (subport - 1))) {
addr = pd->subport_uregbase + PAGE_SIZE * (subport - 1);
size = PAGE_SIZE;
- } else if (pgaddr == (((u64) pd->subport_rcvhdr_base +
- pd->port_rcvhdrq_size * (subport - 1)) &
- MMAP64_MASK)) {
+ } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base +
+ pd->port_rcvhdrq_size * (subport - 1))) {
addr = pd->subport_rcvhdr_base +
pd->port_rcvhdrq_size * (subport - 1);
size = pd->port_rcvhdrq_size;
- } else if (pgaddr == (((u64) pd->subport_rcvegrbuf +
- size * (subport - 1)) & MMAP64_MASK)) {
+ } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf +
+ size * (subport - 1))) {
addr = pd->subport_rcvegrbuf + size * (subport - 1);
/* rcvegrbufs are read-only on the slave */
if (vma->vm_flags & VM_WRITE) {
@@ -1190,10 +1194,8 @@ static int mmap_kvaddr(struct vm_area_struct *vma, u64 pgaddr,
* with mprotect.
*/
vma->vm_flags &= ~VM_MAYWRITE;
- } else {
- ret = -EINVAL;
+ } else
goto bail;
- }
len = vma->vm_end - vma->vm_start;
if (len > size) {
ipath_cdbg(MM, "FAIL: reqlen %lx > %zx\n", len, size);
@@ -1204,7 +1206,7 @@ static int mmap_kvaddr(struct vm_area_struct *vma, u64 pgaddr,
vma->vm_pgoff = (unsigned long) addr >> PAGE_SHIFT;
vma->vm_ops = &ipath_file_vm_ops;
vma->vm_flags |= VM_RESERVED | VM_DONTEXPAND;
- ret = 0;
+ ret = 1;
bail:
return ret;
@@ -1264,8 +1266,10 @@ static int ipath_mmap(struct file *fp, struct vm_area_struct *vma)
* Check for kernel virtual addresses first, anything else must
* match a HW or memory address.
*/
- if (pgaddr >= (1ULL<<40)) {
- ret = mmap_kvaddr(vma, pgaddr, pd, subport_fp(fp));
+ ret = mmap_kvaddr(vma, pgaddr, pd, subport_fp(fp));
+ if (ret) {
+ if (ret > 0)
+ ret = 0;
goto bail;
}
@@ -1411,7 +1415,7 @@ static int init_subports(struct ipath_devdata *dd,
*/
if (uinfo->spu_subport_cnt <= 1)
goto bail;
- if (uinfo->spu_subport_cnt > 4) {
+ if (uinfo->spu_subport_cnt > INFINIPATH_MAX_SUBPORT) {
ret = -EINVAL;
goto bail;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-07 05:15:38 +0000