linux/net/sunrpc
Chuck Lever 99ef4db329 xprtrdma: Replace DMA_BIDIRECTIONAL
The use of DMA_BIDIRECTIONAL is discouraged by DMA-API.txt.
Fortunately, xprtrdma now knows which direction I/O is going as
soon as it allocates each regbuf.

The RPC Call and Reply buffers are no longer the same regbuf. They
can each be labeled correctly now. The RPC Reply buffer is never
part of either a Send or Receive WR, but it can be part of Reply
chunk, which is mapped and registered via ->ro_map . So it is not
DMA mapped when it is allocated (DMA_NONE), to avoid a double-
mapping.

Since Receive buffers are no longer DMA_BIDIRECTIONAL and their
contents are never modified by the host CPU, DMA-API-HOWTO.txt
suggests that a DMA sync before posting each buffer should be
unnecessary. (See my_card_interrupt_handler).

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2016-09-19 13:08:37 -04:00
..
auth_gss svcauth_gss: Revert 64c59a3726 ("Remove unnecessary allocation") 2016-09-12 16:57:16 -04:00
xprtrdma xprtrdma: Replace DMA_BIDIRECTIONAL 2016-09-19 13:08:37 -04:00
addr.c replace strict_strto calls 2014-07-12 18:45:49 -04:00
auth_generic.c sunrpc: move NO_CRKEY_TIMEOUT to the auth->au_flags 2016-07-19 16:23:24 -04:00
auth_null.c sunrpc: move NO_CRKEY_TIMEOUT to the auth->au_flags 2016-07-19 16:23:24 -04:00
auth_unix.c sunrpc: move NO_CRKEY_TIMEOUT to the auth->au_flags 2016-07-19 16:23:24 -04:00
auth.c sunrpc: Fix bit count when setting hashtable size to power-of-two 2016-07-19 16:23:26 -04:00
backchannel_rqst.c SUNRPC: Refactor rpc_xdr_buf_init() 2016-09-19 13:08:37 -04:00
cache.c sunrpc: remove 'inuse' flag from struct cache_detail. 2016-07-13 15:32:47 -04:00
clnt.c SUNRPC: Separate buffer pointers for RPC Call and Reply messages 2016-09-19 13:08:37 -04:00
debugfs.c SUNRPC: Address kbuild warning in net/sunrpc/debugfs.c 2015-06-11 14:01:06 -04:00
Kconfig rpcrdma: Merge svcrdma and xprtrdma modules into one 2015-06-04 16:56:02 -04:00
Makefile SUNRPC: Add a structure to track multiple transports 2016-02-05 18:48:54 -05:00
netns.h Merge branch 'for-3.14' of git://linux-nfs.org/~bfields/linux 2014-01-30 10:18:43 -08:00
rpc_pipe.c vfs: Pass data, ns, and ns->userns to mount_ns 2016-06-23 15:41:53 -05:00
rpcb_clnt.c SUNRPC: Use the multipath iterator to assign a transport to each task 2016-02-05 18:48:55 -05:00
sched.c SUNRPC: Separate buffer pointers for RPC Call and Reply messages 2016-09-19 13:08:37 -04:00
socklib.c sunrpc: do not pull udp headers on receive 2016-04-11 15:31:33 -04:00
stats.c sunrpc: add rpc_count_iostats_idx 2015-02-03 11:06:38 -08:00
sunrpc_syms.c sunrpc: make debugfs file creation failure non-fatal 2015-04-23 14:42:27 -04:00
sunrpc.h SUNRPC: track whether a request is coming from a loop-back interface. 2014-05-22 15:59:18 -04:00
svc_xprt.c SUNRPC: Remove unused callback xpo_adjust_wspace() 2016-07-13 15:53:50 -04:00
svc.c SUNRPC: Initialise struct svc_serv backchannel fields during __svc_create() 2016-09-19 13:08:36 -04:00
svcauth_unix.c svcrpc: move some initialization to common code 2015-11-24 10:39:16 -07:00
svcauth.c svcrpc: move some initialization to common code 2015-11-24 10:39:16 -07:00
svcsock.c SUNRPC: Detect immediate closure of accepted sockets 2016-08-01 17:53:42 -04:00
sysctl.c Sunrpc: Supports hexadecimal number for sysctl files of sunrpc debug 2015-11-03 15:56:49 -05:00
timer.c net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
xdr.c SUNRPC: init xdr_stream for zero iov_len, page_len 2016-05-09 09:05:40 -04:00
xprt.c SUNRPC: Generalize the RPC buffer release API 2016-09-19 13:08:37 -04:00
xprtmultipath.c SUNRPC search xprt switch for sockaddr 2016-09-19 13:08:36 -04:00
xprtsock.c SUNRPC: Generalize the RPC buffer release API 2016-09-19 13:08:37 -04:00