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xen/xenbus: Rename *RING_PAGE* to *RING_GRANT* 

Linux may use a different page size than the size of grant. So make
clear that the order is actually in number of grant.

Signed-off-by: Julien Grall <julien.grall@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
This commit is contained in:
Julien Grall 2015-10-13 17:50:11 +01:00 committed by David Vrabel
parent d5f985c834
commit 9cce2914e2
5 changed files with 29 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/block/xen-blkback/blkback.c
View File

@ -87,7 +87,7 @@ MODULE_PARM_DESC(max_persistent_grants,
* Maximum order of pages to be used for the shared ring between front and * Maximum order of pages to be used for the shared ring between front and
* backend, 4KB page granularity is used. * backend, 4KB page granularity is used.
*/ */
unsigned int xen_blkif_max_ring_order = XENBUS_MAX_RING_PAGE_ORDER; unsigned int xen_blkif_max_ring_order = XENBUS_MAX_RING_GRANT_ORDER;
module_param_named(max_ring_page_order, xen_blkif_max_ring_order, int, S_IRUGO); module_param_named(max_ring_page_order, xen_blkif_max_ring_order, int, S_IRUGO);
MODULE_PARM_DESC(max_ring_page_order, "Maximum order of pages to be used for the shared ring"); MODULE_PARM_DESC(max_ring_page_order, "Maximum order of pages to be used for the shared ring");
/* /*
@ -1446,10 +1446,10 @@ static int __init xen_blkif_init(void)
if (!xen_domain()) if (!xen_domain())
return -ENODEV; return -ENODEV;
if (xen_blkif_max_ring_order > XENBUS_MAX_RING_PAGE_ORDER) { if (xen_blkif_max_ring_order > XENBUS_MAX_RING_GRANT_ORDER) {
pr_info("Invalid max_ring_order (%d), will use default max: %d.\n", pr_info("Invalid max_ring_order (%d), will use default max: %d.\n",
xen_blkif_max_ring_order, XENBUS_MAX_RING_PAGE_ORDER); xen_blkif_max_ring_order, XENBUS_MAX_RING_GRANT_ORDER);
xen_blkif_max_ring_order = XENBUS_MAX_RING_PAGE_ORDER; xen_blkif_max_ring_order = XENBUS_MAX_RING_GRANT_ORDER;
} }
rc = xen_blkif_interface_init(); rc = xen_blkif_interface_init();

2
drivers/block/xen-blkback/xenbus.c
View File

@ -829,7 +829,7 @@ again:
static int connect_ring(struct backend_info *be) static int connect_ring(struct backend_info *be)
{ {
struct xenbus_device *dev = be->dev; struct xenbus_device *dev = be->dev;
unsigned int ring_ref[XENBUS_MAX_RING_PAGES]; unsigned int ring_ref[XENBUS_MAX_RING_GRANTS];
unsigned int evtchn, nr_grefs, ring_page_order; unsigned int evtchn, nr_grefs, ring_page_order;
unsigned int pers_grants; unsigned int pers_grants;
char protocol[64] = ""; char protocol[64] = "";

10
drivers/block/xen-blkfront.c
View File

@ -111,7 +111,7 @@ MODULE_PARM_DESC(max_ring_page_order, "Maximum order of pages to be used for the
__CONST_RING_SIZE(blkif, XEN_PAGE_SIZE * (info)->nr_ring_pages) __CONST_RING_SIZE(blkif, XEN_PAGE_SIZE * (info)->nr_ring_pages)
#define BLK_MAX_RING_SIZE \ #define BLK_MAX_RING_SIZE \
__CONST_RING_SIZE(blkif, XEN_PAGE_SIZE * XENBUS_MAX_RING_PAGES) __CONST_RING_SIZE(blkif, XEN_PAGE_SIZE * XENBUS_MAX_RING_GRANTS)
/* /*
* ring-ref%i i=(-1UL) would take 11 characters + 'ring-ref' is 8, so 19 * ring-ref%i i=(-1UL) would take 11 characters + 'ring-ref' is 8, so 19
@ -133,7 +133,7 @@ struct blkfront_info
int vdevice; int vdevice;
blkif_vdev_t handle; blkif_vdev_t handle;
enum blkif_state connected; enum blkif_state connected;
int ring_ref[XENBUS_MAX_RING_PAGES]; int ring_ref[XENBUS_MAX_RING_GRANTS];
unsigned int nr_ring_pages; unsigned int nr_ring_pages;
struct blkif_front_ring ring; struct blkif_front_ring ring;
unsigned int evtchn, irq; unsigned int evtchn, irq;
@ -1413,7 +1413,7 @@ static int setup_blkring(struct xenbus_device *dev,
struct blkif_sring *sring; struct blkif_sring *sring;
int err, i; int err, i;
unsigned long ring_size = info->nr_ring_pages * XEN_PAGE_SIZE; unsigned long ring_size = info->nr_ring_pages * XEN_PAGE_SIZE;
grant_ref_t gref[XENBUS_MAX_RING_PAGES]; grant_ref_t gref[XENBUS_MAX_RING_GRANTS];
for (i = 0; i < info->nr_ring_pages; i++) for (i = 0; i < info->nr_ring_pages; i++)
info->ring_ref[i] = GRANT_INVALID_REF; info->ring_ref[i] = GRANT_INVALID_REF;
@ -2284,9 +2284,9 @@ static int __init xlblk_init(void)
if (!xen_domain()) if (!xen_domain())
return -ENODEV; return -ENODEV;
if (xen_blkif_max_ring_order > XENBUS_MAX_RING_PAGE_ORDER) { if (xen_blkif_max_ring_order > XENBUS_MAX_RING_GRANT_ORDER) {
pr_info("Invalid max_ring_order (%d), will use default max: %d.\n", pr_info("Invalid max_ring_order (%d), will use default max: %d.\n",
xen_blkif_max_ring_order, XENBUS_MAX_RING_PAGE_ORDER); xen_blkif_max_ring_order, XENBUS_MAX_RING_GRANT_ORDER);
xen_blkif_max_ring_order = 0; xen_blkif_max_ring_order = 0;
} }

34
drivers/xen/xenbus/xenbus_client.c
View File

@ -56,11 +56,11 @@ struct xenbus_map_node {
struct vm_struct *area; struct vm_struct *area;
} pv; } pv;
struct { struct {
struct page *pages[XENBUS_MAX_RING_PAGES]; struct page *pages[XENBUS_MAX_RING_GRANTS];
void *addr; void *addr;
} hvm; } hvm;
}; };
grant_handle_t handles[XENBUS_MAX_RING_PAGES]; grant_handle_t handles[XENBUS_MAX_RING_GRANTS];
unsigned int nr_handles; unsigned int nr_handles;
}; };
@ -479,12 +479,12 @@ static int __xenbus_map_ring(struct xenbus_device *dev,
unsigned int flags, unsigned int flags,
bool *leaked) bool *leaked)
{ {
struct gnttab_map_grant_ref map[XENBUS_MAX_RING_PAGES]; struct gnttab_map_grant_ref map[XENBUS_MAX_RING_GRANTS];
struct gnttab_unmap_grant_ref unmap[XENBUS_MAX_RING_PAGES]; struct gnttab_unmap_grant_ref unmap[XENBUS_MAX_RING_GRANTS];
int i, j; int i, j;
int err = GNTST_okay; int err = GNTST_okay;
if (nr_grefs > XENBUS_MAX_RING_PAGES) if (nr_grefs > XENBUS_MAX_RING_GRANTS)
return -EINVAL; return -EINVAL;
for (i = 0; i < nr_grefs; i++) { for (i = 0; i < nr_grefs; i++) {
@ -540,15 +540,15 @@ static int xenbus_map_ring_valloc_pv(struct xenbus_device *dev,
{ {
struct xenbus_map_node *node; struct xenbus_map_node *node;
struct vm_struct *area; struct vm_struct *area;
pte_t *ptes[XENBUS_MAX_RING_PAGES]; pte_t *ptes[XENBUS_MAX_RING_GRANTS];
phys_addr_t phys_addrs[XENBUS_MAX_RING_PAGES]; phys_addr_t phys_addrs[XENBUS_MAX_RING_GRANTS];
int err = GNTST_okay; int err = GNTST_okay;
int i; int i;
bool leaked; bool leaked;
*vaddr = NULL; *vaddr = NULL;
if (nr_grefs > XENBUS_MAX_RING_PAGES) if (nr_grefs > XENBUS_MAX_RING_GRANTS)
return -EINVAL; return -EINVAL;
node = kzalloc(sizeof(*node), GFP_KERNEL); node = kzalloc(sizeof(*node), GFP_KERNEL);
@ -602,10 +602,10 @@ static int xenbus_map_ring_valloc_hvm(struct xenbus_device *dev,
void *addr; void *addr;
bool leaked = false; bool leaked = false;
/* Why do we need two arrays? See comment of __xenbus_map_ring */ /* Why do we need two arrays? See comment of __xenbus_map_ring */
phys_addr_t phys_addrs[XENBUS_MAX_RING_PAGES]; phys_addr_t phys_addrs[XENBUS_MAX_RING_GRANTS];
unsigned long addrs[XENBUS_MAX_RING_PAGES]; unsigned long addrs[XENBUS_MAX_RING_GRANTS];
if (nr_grefs > XENBUS_MAX_RING_PAGES) if (nr_grefs > XENBUS_MAX_RING_GRANTS)
return -EINVAL; return -EINVAL;
*vaddr = NULL; *vaddr = NULL;
@ -686,10 +686,10 @@ int xenbus_map_ring(struct xenbus_device *dev, grant_ref_t *gnt_refs,
unsigned int nr_grefs, grant_handle_t *handles, unsigned int nr_grefs, grant_handle_t *handles,
unsigned long *vaddrs, bool *leaked) unsigned long *vaddrs, bool *leaked)
{ {
phys_addr_t phys_addrs[XENBUS_MAX_RING_PAGES]; phys_addr_t phys_addrs[XENBUS_MAX_RING_GRANTS];
int i; int i;
if (nr_grefs > XENBUS_MAX_RING_PAGES) if (nr_grefs > XENBUS_MAX_RING_GRANTS)
return -EINVAL; return -EINVAL;
for (i = 0; i < nr_grefs; i++) for (i = 0; i < nr_grefs; i++)
@ -722,7 +722,7 @@ EXPORT_SYMBOL_GPL(xenbus_unmap_ring_vfree);
static int xenbus_unmap_ring_vfree_pv(struct xenbus_device *dev, void *vaddr) static int xenbus_unmap_ring_vfree_pv(struct xenbus_device *dev, void *vaddr)
{ {
struct xenbus_map_node *node; struct xenbus_map_node *node;
struct gnttab_unmap_grant_ref unmap[XENBUS_MAX_RING_PAGES]; struct gnttab_unmap_grant_ref unmap[XENBUS_MAX_RING_GRANTS];
unsigned int level; unsigned int level;
int i; int i;
bool leaked = false; bool leaked = false;
@ -787,7 +787,7 @@ static int xenbus_unmap_ring_vfree_hvm(struct xenbus_device *dev, void *vaddr)
int rv; int rv;
struct xenbus_map_node *node; struct xenbus_map_node *node;
void *addr; void *addr;
unsigned long addrs[XENBUS_MAX_RING_PAGES]; unsigned long addrs[XENBUS_MAX_RING_GRANTS];
int i; int i;
spin_lock(&xenbus_valloc_lock); spin_lock(&xenbus_valloc_lock);
@ -840,11 +840,11 @@ int xenbus_unmap_ring(struct xenbus_device *dev,
grant_handle_t *handles, unsigned int nr_handles, grant_handle_t *handles, unsigned int nr_handles,
unsigned long *vaddrs) unsigned long *vaddrs)
{ {
struct gnttab_unmap_grant_ref unmap[XENBUS_MAX_RING_PAGES]; struct gnttab_unmap_grant_ref unmap[XENBUS_MAX_RING_GRANTS];
int i; int i;
int err; int err;
if (nr_handles > XENBUS_MAX_RING_PAGES) if (nr_handles > XENBUS_MAX_RING_GRANTS)
return -EINVAL; return -EINVAL;
for (i = 0; i < nr_handles; i++) for (i = 0; i < nr_handles; i++)

4
include/xen/xenbus.h
View File

@ -46,8 +46,8 @@
#include <xen/interface/io/xenbus.h> #include <xen/interface/io/xenbus.h>
#include <xen/interface/io/xs_wire.h> #include <xen/interface/io/xs_wire.h>
#define XENBUS_MAX_RING_PAGE_ORDER 4 #define XENBUS_MAX_RING_GRANT_ORDER 4
#define XENBUS_MAX_RING_PAGES (1U << XENBUS_MAX_RING_PAGE_ORDER) #define XENBUS_MAX_RING_GRANTS (1U << XENBUS_MAX_RING_GRANT_ORDER)
#define INVALID_GRANT_HANDLE (~0U) #define INVALID_GRANT_HANDLE (~0U)
/* Register callback to watch this node. */ /* Register callback to watch this node. */