diff options
Diffstat (limited to 'sys/dev/xen/blkfront/block.h')
| -rw-r--r-- | sys/dev/xen/blkfront/block.h | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/sys/dev/xen/blkfront/block.h b/sys/dev/xen/blkfront/block.h index 9c803bc..3007118 100644 --- a/sys/dev/xen/blkfront/block.h +++ b/sys/dev/xen/blkfront/block.h @@ -61,11 +61,19 @@ ((size / PAGE_SIZE) + 1) /** + * The maximum number of shared memory ring pages we will allow in a + * negotiated block-front/back communication channel. Allow enough + * ring space for all requests to be XBD_MAX_REQUEST_SIZE'd. + */ +#define XBD_MAX_RING_PAGES 32 + +/** * The maximum number of outstanding requests blocks (request headers plus * additional segment blocks) we will allow in a negotiated block-front/back * communication channel. */ -#define XBD_MAX_REQUESTS 256 +#define XBD_MAX_REQUESTS \ + __CONST_RING_SIZE(blkif, PAGE_SIZE * XBD_MAX_RING_PAGES) /** * The maximum mapped region size per request we will allow in a negotiated @@ -83,15 +91,6 @@ (MIN(BLKIF_MAX_SEGMENTS_PER_REQUEST, \ XBD_SIZE_TO_SEGS(XBD_MAX_REQUEST_SIZE))) -/** - * The maximum number of shared memory ring pages we will allow in a - * negotiated block-front/back communication channel. Allow enough - * ring space for all requests to be XBD_MAX_REQUEST_SIZE'd. - */ -#define XBD_MAX_RING_PAGES \ - BLKIF_RING_PAGES(BLKIF_SEGS_TO_BLOCKS(XBD_MAX_SEGMENTS_PER_REQUEST) \ - * XBD_MAX_REQUESTS) - typedef enum { XBDCF_Q_MASK = 0xFF, /* This command has contributed to xbd_qfrozen_cnt. */ @@ -175,7 +174,6 @@ struct xbd_softc { u_int xbd_ring_pages; uint32_t xbd_max_requests; uint32_t xbd_max_request_segments; - uint32_t xbd_max_request_blocks; uint32_t xbd_max_request_size; grant_ref_t xbd_ring_ref[XBD_MAX_RING_PAGES]; blkif_front_ring_t xbd_ring; |
