diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/xprtrdma/verbs.c | 95 |
1 files changed, 80 insertions, 15 deletions
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index d04208a02f6..0f3b43148b7 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -423,7 +423,8 @@ rpcrdma_clean_cq(struct ib_cq *cq) int rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg) { - int rc; + int rc, mem_priv; + struct ib_device_attr devattr; struct rpcrdma_ia *ia = &xprt->rx_ia; init_completion(&ia->ri_done); @@ -443,6 +444,53 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg) } /* + * Query the device to determine if the requested memory + * registration strategy is supported. If it isn't, set the + * strategy to a globally supported model. + */ + rc = ib_query_device(ia->ri_id->device, &devattr); + if (rc) { + dprintk("RPC: %s: ib_query_device failed %d\n", + __func__, rc); + goto out2; + } + + if (devattr.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY) { + ia->ri_have_dma_lkey = 1; + ia->ri_dma_lkey = ia->ri_id->device->local_dma_lkey; + } + + switch (memreg) { + case RPCRDMA_MEMWINDOWS: + case RPCRDMA_MEMWINDOWS_ASYNC: + if (!(devattr.device_cap_flags & IB_DEVICE_MEM_WINDOW)) { + dprintk("RPC: %s: MEMWINDOWS registration " + "specified but not supported by adapter, " + "using slower RPCRDMA_REGISTER\n", + __func__); + memreg = RPCRDMA_REGISTER; + } + break; + case RPCRDMA_MTHCAFMR: + if (!ia->ri_id->device->alloc_fmr) { +#if RPCRDMA_PERSISTENT_REGISTRATION + dprintk("RPC: %s: MTHCAFMR registration " + "specified but not supported by adapter, " + "using riskier RPCRDMA_ALLPHYSICAL\n", + __func__); + memreg = RPCRDMA_ALLPHYSICAL; +#else + dprintk("RPC: %s: MTHCAFMR registration " + "specified but not supported by adapter, " + "using slower RPCRDMA_REGISTER\n", + __func__); + memreg = RPCRDMA_REGISTER; +#endif + } + break; + } + + /* * Optionally obtain an underlying physical identity mapping in * order to do a memory window-based bind. This base registration * is protected from remote access - that is enabled only by binding @@ -450,22 +498,27 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg) * revoked after the corresponding completion similar to a storage * adapter. */ - if (memreg > RPCRDMA_REGISTER) { - int mem_priv = IB_ACCESS_LOCAL_WRITE; - switch (memreg) { + switch (memreg) { + case RPCRDMA_BOUNCEBUFFERS: + case RPCRDMA_REGISTER: + break; #if RPCRDMA_PERSISTENT_REGISTRATION - case RPCRDMA_ALLPHYSICAL: - mem_priv |= IB_ACCESS_REMOTE_WRITE; - mem_priv |= IB_ACCESS_REMOTE_READ; - break; + case RPCRDMA_ALLPHYSICAL: + mem_priv = IB_ACCESS_LOCAL_WRITE | + IB_ACCESS_REMOTE_WRITE | + IB_ACCESS_REMOTE_READ; + goto register_setup; #endif - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: - mem_priv |= IB_ACCESS_MW_BIND; - break; - default: + case RPCRDMA_MEMWINDOWS_ASYNC: + case RPCRDMA_MEMWINDOWS: + mem_priv = IB_ACCESS_LOCAL_WRITE | + IB_ACCESS_MW_BIND; + goto register_setup; + case RPCRDMA_MTHCAFMR: + if (ia->ri_have_dma_lkey) break; - } + mem_priv = IB_ACCESS_LOCAL_WRITE; + register_setup: ia->ri_bind_mem = ib_get_dma_mr(ia->ri_pd, mem_priv); if (IS_ERR(ia->ri_bind_mem)) { printk(KERN_ALERT "%s: ib_get_dma_mr for " @@ -475,7 +528,15 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg) memreg = RPCRDMA_REGISTER; ia->ri_bind_mem = NULL; } + break; + default: + printk(KERN_ERR "%s: invalid memory registration mode %d\n", + __func__, memreg); + rc = -EINVAL; + goto out2; } + dprintk("RPC: %s: memory registration strategy is %d\n", + __func__, memreg); /* Else will do memory reg/dereg for each chunk */ ia->ri_memreg_strategy = memreg; @@ -1248,7 +1309,11 @@ rpcrdma_register_internal(struct rpcrdma_ia *ia, void *va, int len, va, len, DMA_BIDIRECTIONAL); iov->length = len; - if (ia->ri_bind_mem != NULL) { + if (ia->ri_have_dma_lkey) { + *mrp = NULL; + iov->lkey = ia->ri_dma_lkey; + return 0; + } else if (ia->ri_bind_mem != NULL) { *mrp = NULL; iov->lkey = ia->ri_bind_mem->lkey; return 0; |