diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/net/sunrpc/xprtrdma/physical_ops.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/net/sunrpc/xprtrdma/physical_ops.c')
-rw-r--r-- | kernel/net/sunrpc/xprtrdma/physical_ops.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/kernel/net/sunrpc/xprtrdma/physical_ops.c b/kernel/net/sunrpc/xprtrdma/physical_ops.c new file mode 100644 index 000000000..ba518af16 --- /dev/null +++ b/kernel/net/sunrpc/xprtrdma/physical_ops.c @@ -0,0 +1,94 @@ +/* + * Copyright (c) 2015 Oracle. All rights reserved. + * Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved. + */ + +/* No-op chunk preparation. All client memory is pre-registered. + * Sometimes referred to as ALLPHYSICAL mode. + * + * Physical registration is simple because all client memory is + * pre-registered and never deregistered. This mode is good for + * adapter bring up, but is considered not safe: the server is + * trusted not to abuse its access to client memory not involved + * in RDMA I/O. + */ + +#include "xprt_rdma.h" + +#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) +# define RPCDBG_FACILITY RPCDBG_TRANS +#endif + +static int +physical_op_open(struct rpcrdma_ia *ia, struct rpcrdma_ep *ep, + struct rpcrdma_create_data_internal *cdata) +{ + return 0; +} + +/* PHYSICAL memory registration conveys one page per chunk segment. + */ +static size_t +physical_op_maxpages(struct rpcrdma_xprt *r_xprt) +{ + return min_t(unsigned int, RPCRDMA_MAX_DATA_SEGS, + rpcrdma_max_segments(r_xprt)); +} + +static int +physical_op_init(struct rpcrdma_xprt *r_xprt) +{ + return 0; +} + +/* The client's physical memory is already exposed for + * remote access via RDMA READ or RDMA WRITE. + */ +static int +physical_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, + int nsegs, bool writing) +{ + struct rpcrdma_ia *ia = &r_xprt->rx_ia; + + rpcrdma_map_one(ia->ri_id->device, seg, + rpcrdma_data_dir(writing)); + seg->mr_rkey = ia->ri_bind_mem->rkey; + seg->mr_base = seg->mr_dma; + seg->mr_nsegs = 1; + return 1; +} + +/* Unmap a memory region, but leave it registered. + */ +static int +physical_op_unmap(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg) +{ + struct rpcrdma_ia *ia = &r_xprt->rx_ia; + + read_lock(&ia->ri_qplock); + rpcrdma_unmap_one(ia->ri_id->device, seg); + read_unlock(&ia->ri_qplock); + + return 1; +} + +static void +physical_op_reset(struct rpcrdma_xprt *r_xprt) +{ +} + +static void +physical_op_destroy(struct rpcrdma_buffer *buf) +{ +} + +const struct rpcrdma_memreg_ops rpcrdma_physical_memreg_ops = { + .ro_map = physical_op_map, + .ro_unmap = physical_op_unmap, + .ro_open = physical_op_open, + .ro_maxpages = physical_op_maxpages, + .ro_init = physical_op_init, + .ro_reset = physical_op_reset, + .ro_destroy = physical_op_destroy, + .ro_displayname = "physical", +}; |