req_maps are no longer used by the send path and can thus be removed.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
struct page *pages[RPCSVC_MAXPAGES];
};
-/*
- * NFS_ requests are mapped on the client side by the chunk lists in
- * the RPCRDMA header. During the fetching of the RPC from the client
- * and the writing of the reply to the client, the memory in the
- * client and the memory in the server must be mapped as contiguous
- * vaddr/len for access by the hardware. These data strucures keep
- * these mappings.
- *
- * For an RDMA_WRITE, the 'sge' maps the RPC REPLY. For RDMA_READ, the
- * 'sge' in the svc_rdma_req_map maps the server side RPC reply and the
- * 'ch' field maps the read-list of the RPCRDMA header to the 'sge'
- * mapping of the reply.
- */
-struct svc_rdma_chunk_sge {
- int start; /* sge no for this chunk */
- int count; /* sge count for this chunk */
-};
struct svc_rdma_fastreg_mr {
struct ib_mr *mr;
struct scatterlist *sg;
enum dma_data_direction direction;
struct list_head frmr_list;
};
-struct svc_rdma_req_map {
- struct list_head free;
- unsigned long count;
- union {
- struct kvec sge[RPCSVC_MAXPAGES];
- struct svc_rdma_chunk_sge ch[RPCSVC_MAXPAGES];
- unsigned long lkey[RPCSVC_MAXPAGES];
- };
-};
+
#define RDMACTXT_F_LAST_CTXT 2
#define SVCRDMA_DEVCAP_FAST_REG 1 /* fast mr registration */
int sc_ctxt_used;
spinlock_t sc_rw_ctxt_lock;
struct list_head sc_rw_ctxts;
- spinlock_t sc_map_lock;
- struct list_head sc_maps;
struct list_head sc_rq_dto_q;
spinlock_t sc_rq_dto_lock;
struct xdr_buf *xdr);
/* svc_rdma_sendto.c */
-extern int svc_rdma_map_xdr(struct svcxprt_rdma *, struct xdr_buf *,
- struct svc_rdma_req_map *, bool);
extern int svc_rdma_map_reply_hdr(struct svcxprt_rdma *rdma,
struct svc_rdma_op_ctxt *ctxt,
__be32 *rdma_resp, unsigned int len);
extern struct svc_rdma_op_ctxt *svc_rdma_get_context(struct svcxprt_rdma *);
extern void svc_rdma_put_context(struct svc_rdma_op_ctxt *, int);
extern void svc_rdma_unmap_dma(struct svc_rdma_op_ctxt *ctxt);
-extern struct svc_rdma_req_map *svc_rdma_get_req_map(struct svcxprt_rdma *);
-extern void svc_rdma_put_req_map(struct svcxprt_rdma *,
- struct svc_rdma_req_map *);
extern struct svc_rdma_fastreg_mr *svc_rdma_get_frmr(struct svcxprt_rdma *);
extern void svc_rdma_put_frmr(struct svcxprt_rdma *,
struct svc_rdma_fastreg_mr *);
xdr_encode_write_chunk(p, rp_ch, consumed);
}
-int svc_rdma_map_xdr(struct svcxprt_rdma *xprt,
- struct xdr_buf *xdr,
- struct svc_rdma_req_map *vec,
- bool write_chunk_present)
-{
- int sge_no;
- u32 sge_bytes;
- u32 page_bytes;
- u32 page_off;
- int page_no;
-
- if (xdr->len !=
- (xdr->head[0].iov_len + xdr->page_len + xdr->tail[0].iov_len)) {
- pr_err("svcrdma: %s: XDR buffer length error\n", __func__);
- return -EIO;
- }
-
- /* Skip the first sge, this is for the RPCRDMA header */
- sge_no = 1;
-
- /* Head SGE */
- vec->sge[sge_no].iov_base = xdr->head[0].iov_base;
- vec->sge[sge_no].iov_len = xdr->head[0].iov_len;
- sge_no++;
-
- /* pages SGE */
- page_no = 0;
- page_bytes = xdr->page_len;
- page_off = xdr->page_base;
- while (page_bytes) {
- vec->sge[sge_no].iov_base =
- page_address(xdr->pages[page_no]) + page_off;
- sge_bytes = min_t(u32, page_bytes, (PAGE_SIZE - page_off));
- page_bytes -= sge_bytes;
- vec->sge[sge_no].iov_len = sge_bytes;
-
- sge_no++;
- page_no++;
- page_off = 0; /* reset for next time through loop */
- }
-
- /* Tail SGE */
- if (xdr->tail[0].iov_len) {
- unsigned char *base = xdr->tail[0].iov_base;
- size_t len = xdr->tail[0].iov_len;
- u32 xdr_pad = xdr_padsize(xdr->page_len);
-
- if (write_chunk_present && xdr_pad) {
- base += xdr_pad;
- len -= xdr_pad;
- }
-
- if (len) {
- vec->sge[sge_no].iov_base = base;
- vec->sge[sge_no].iov_len = len;
- sge_no++;
- }
- }
-
- dprintk("svcrdma: %s: sge_no %d page_no %d "
- "page_base %u page_len %u head_len %zu tail_len %zu\n",
- __func__, sge_no, page_no, xdr->page_base, xdr->page_len,
- xdr->head[0].iov_len, xdr->tail[0].iov_len);
-
- vec->count = sge_no;
- return 0;
-}
-
/* Parse the RPC Call's transport header.
*/
static void svc_rdma_get_write_arrays(__be32 *rdma_argp,
}
}
-static struct svc_rdma_req_map *alloc_req_map(gfp_t flags)
-{
- struct svc_rdma_req_map *map;
-
- map = kmalloc(sizeof(*map), flags);
- if (map)
- INIT_LIST_HEAD(&map->free);
- return map;
-}
-
-static bool svc_rdma_prealloc_maps(struct svcxprt_rdma *xprt)
-{
- unsigned int i;
-
- /* One for each receive buffer on this connection. */
- i = xprt->sc_max_requests;
-
- while (i--) {
- struct svc_rdma_req_map *map;
-
- map = alloc_req_map(GFP_KERNEL);
- if (!map) {
- dprintk("svcrdma: No memory for request map\n");
- return false;
- }
- list_add(&map->free, &xprt->sc_maps);
- }
- return true;
-}
-
-struct svc_rdma_req_map *svc_rdma_get_req_map(struct svcxprt_rdma *xprt)
-{
- struct svc_rdma_req_map *map = NULL;
-
- spin_lock(&xprt->sc_map_lock);
- if (list_empty(&xprt->sc_maps))
- goto out_empty;
-
- map = list_first_entry(&xprt->sc_maps,
- struct svc_rdma_req_map, free);
- list_del_init(&map->free);
- spin_unlock(&xprt->sc_map_lock);
-
-out:
- map->count = 0;
- return map;
-
-out_empty:
- spin_unlock(&xprt->sc_map_lock);
-
- /* Pre-allocation amount was incorrect */
- map = alloc_req_map(GFP_NOIO);
- if (map)
- goto out;
-
- WARN_ONCE(1, "svcrdma: empty request map list?\n");
- return NULL;
-}
-
-void svc_rdma_put_req_map(struct svcxprt_rdma *xprt,
- struct svc_rdma_req_map *map)
-{
- spin_lock(&xprt->sc_map_lock);
- list_add(&map->free, &xprt->sc_maps);
- spin_unlock(&xprt->sc_map_lock);
-}
-
-static void svc_rdma_destroy_maps(struct svcxprt_rdma *xprt)
-{
- while (!list_empty(&xprt->sc_maps)) {
- struct svc_rdma_req_map *map;
-
- map = list_first_entry(&xprt->sc_maps,
- struct svc_rdma_req_map, free);
- list_del(&map->free);
- kfree(map);
- }
-}
-
/* QP event handler */
static void qp_event_handler(struct ib_event *event, void *context)
{
INIT_LIST_HEAD(&cma_xprt->sc_frmr_q);
INIT_LIST_HEAD(&cma_xprt->sc_ctxts);
INIT_LIST_HEAD(&cma_xprt->sc_rw_ctxts);
- INIT_LIST_HEAD(&cma_xprt->sc_maps);
init_waitqueue_head(&cma_xprt->sc_send_wait);
spin_lock_init(&cma_xprt->sc_lock);
spin_lock_init(&cma_xprt->sc_frmr_q_lock);
spin_lock_init(&cma_xprt->sc_ctxt_lock);
spin_lock_init(&cma_xprt->sc_rw_ctxt_lock);
- spin_lock_init(&cma_xprt->sc_map_lock);
/*
* Note that this implies that the underlying transport support
if (!svc_rdma_prealloc_ctxts(newxprt))
goto errout;
- if (!svc_rdma_prealloc_maps(newxprt))
- goto errout;
/*
* Limit ORD based on client limit, local device limit, and
rdma_dealloc_frmr_q(rdma);
svc_rdma_destroy_rw_ctxts(rdma);
svc_rdma_destroy_ctxts(rdma);
- svc_rdma_destroy_maps(rdma);
/* Destroy the QP if present (not a listener) */
if (rdma->sc_qp && !IS_ERR(rdma->sc_qp))
projects / linux.git / commitdiff