diff options
Diffstat (limited to 'sys/xen/gnttab.c')
| -rw-r--r-- | sys/xen/gnttab.c | 40 |
1 files changed, 27 insertions, 13 deletions
diff --git a/sys/xen/gnttab.c b/sys/xen/gnttab.c index 03c32b7..ca6fa3b 100644 --- a/sys/xen/gnttab.c +++ b/sys/xen/gnttab.c @@ -25,6 +25,9 @@ __FBSDID("$FreeBSD$"); #include <sys/lock.h> #include <sys/malloc.h> #include <sys/mman.h> +#include <sys/limits.h> +#include <sys/rman.h> +#include <machine/resource.h> #include <xen/xen-os.h> #include <xen/hypervisor.h> @@ -51,6 +54,17 @@ static int gnttab_free_count; static grant_ref_t gnttab_free_head; static struct mtx gnttab_list_lock; +#ifdef XENHVM +/* + * Resource representing allocated physical address space + * for the grant table metainfo + */ +static struct resource *gnttab_pseudo_phys_res; + +/* Resource id for allocated physical address space. */ +static int gnttab_pseudo_phys_res_id; +#endif + static grant_entry_t *shared; static struct gnttab_free_callback *gnttab_free_callback_list = NULL; @@ -542,7 +556,7 @@ gnttab_map(unsigned int start_idx, unsigned int end_idx) } int -gnttab_resume(void) +gnttab_resume(device_t dev) { if (max_nr_grant_frames() < nr_grant_frames) @@ -563,8 +577,6 @@ gnttab_suspend(void) #else /* XENHVM */ -#include <dev/xen/xenpci/xenpcivar.h> - static vm_paddr_t resume_frames; static int @@ -603,9 +615,8 @@ gnttab_map(unsigned int start_idx, unsigned int end_idx) } int -gnttab_resume(void) +gnttab_resume(device_t dev) { - int error; unsigned int max_nr_gframes, nr_gframes; nr_gframes = nr_grant_frames; @@ -614,12 +625,15 @@ gnttab_resume(void) return (ENOSYS); if (!resume_frames) { - error = xenpci_alloc_space(PAGE_SIZE * max_nr_gframes, - &resume_frames); - if (error) { - printf("error mapping gnttab share frames\n"); - return (error); - } + KASSERT(dev != NULL, + ("No resume frames and no device provided")); + + gnttab_pseudo_phys_res = bus_alloc_resource(dev, + SYS_RES_MEMORY, &gnttab_pseudo_phys_res_id, 0, ~0, + PAGE_SIZE * max_nr_gframes, RF_ACTIVE); + if (gnttab_pseudo_phys_res == NULL) + panic("Unable to reserve physical memory for gnttab"); + resume_frames = rman_get_start(gnttab_pseudo_phys_res); } return (gnttab_map(0, nr_gframes - 1)); @@ -647,7 +661,7 @@ gnttab_expand(unsigned int req_entries) } int -gnttab_init() +gnttab_init(device_t dev) { int i; unsigned int max_nr_glist_frames; @@ -679,7 +693,7 @@ gnttab_init() goto ini_nomem; } - if (gnttab_resume()) + if (gnttab_resume(dev)) return (ENODEV); nr_init_grefs = nr_grant_frames * GREFS_PER_GRANT_FRAME; |
