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RDS: break out rdma and data ops into nested structs in rds_message

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Clearly separate rdma-related variables in rm from data-related ones.
This is in anticipation of adding atomic support.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
This commit is contained in:
Andy Grover
2010-01-12 12:15:02 -08:00
parent 8690bfa17a
commit e779137aa7
7 changed files with 96 additions and 85 deletions
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44
net/rds/ib_send.c
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@@ -83,11 +83,11 @@ static void rds_ib_send_unmap_rm(struct rds_ib_connection *ic,
rdsdebug("ic %p send %p rm %p\n", ic, send, rm);
ib_dma_unmap_sg(ic->i_cm_id->device,
rm->m_sg, rm->m_nents,
DMA_TO_DEVICE);
rm->data.m_sg, rm->data.m_nents,
DMA_TO_DEVICE);
if (rm->m_rdma_op) {
rds_ib_send_unmap_rdma(ic, rm->m_rdma_op);
if (rm->rdma.m_rdma_op) {
rds_ib_send_unmap_rdma(ic, rm->rdma.m_rdma_op);
/* If the user asked for a completion notification on this
* message, we can implement three different semantics:
@@ -111,10 +111,10 @@ static void rds_ib_send_unmap_rm(struct rds_ib_connection *ic,
*/
rds_ib_send_rdma_complete(rm, wc_status);
if (rm->m_rdma_op->r_write)
rds_stats_add(s_send_rdma_bytes, rm->m_rdma_op->r_bytes);
if (rm->rdma.m_rdma_op->r_write)
rds_stats_add(s_send_rdma_bytes, rm->rdma.m_rdma_op->r_bytes);
else
rds_stats_add(s_recv_rdma_bytes, rm->m_rdma_op->r_bytes);
rds_stats_add(s_recv_rdma_bytes, rm->rdma.m_rdma_op->r_bytes);
}
/* If anyone waited for this message to get flushed out, wake
@@ -244,8 +244,8 @@ void rds_ib_send_cq_comp_handler(struct ib_cq *cq, void *context)
rm = rds_send_get_message(conn, send->s_op);
if (rm) {
if (rm->m_rdma_op)
rds_ib_send_unmap_rdma(ic, rm->m_rdma_op);
if (rm->rdma.m_rdma_op)
rds_ib_send_unmap_rdma(ic, rm->rdma.m_rdma_op);
rds_ib_send_rdma_complete(rm, wc.status);
rds_message_put(rm);
}
@@ -532,18 +532,20 @@ int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm,
rm->m_inc.i_hdr.h_flags,
be32_to_cpu(rm->m_inc.i_hdr.h_len));
*/
if (rm->m_nents) {
rm->m_count = ib_dma_map_sg(dev,
rm->m_sg, rm->m_nents, DMA_TO_DEVICE);
rdsdebug("ic %p mapping rm %p: %d\n", ic, rm, rm->m_count);
if (rm->m_count == 0) {
if (rm->data.m_nents) {
rm->data.m_count = ib_dma_map_sg(dev,
rm->data.m_sg,
rm->data.m_nents,
DMA_TO_DEVICE);
rdsdebug("ic %p mapping rm %p: %d\n", ic, rm, rm->data.m_count);
if (rm->data.m_count == 0) {
rds_ib_stats_inc(s_ib_tx_sg_mapping_failure);
rds_ib_ring_unalloc(&ic->i_send_ring, work_alloc);
ret = -ENOMEM; /* XXX ? */
goto out;
}
} else {
rm->m_count = 0;
rm->data.m_count = 0;
}
ic->i_unsignaled_wrs = rds_ib_sysctl_max_unsig_wrs;
@@ -559,10 +561,10 @@ int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm,
/* If it has a RDMA op, tell the peer we did it. This is
* used by the peer to release use-once RDMA MRs. */
if (rm->m_rdma_op) {
if (rm->rdma.m_rdma_op) {
struct rds_ext_header_rdma ext_hdr;
ext_hdr.h_rdma_rkey = cpu_to_be32(rm->m_rdma_op->r_key);
ext_hdr.h_rdma_rkey = cpu_to_be32(rm->rdma.m_rdma_op->r_key);
rds_message_add_extension(&rm->m_inc.i_hdr,
RDS_EXTHDR_RDMA, &ext_hdr, sizeof(ext_hdr));
}
@@ -590,7 +592,7 @@ int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm,
send = &ic->i_sends[pos];
first = send;
prev = NULL;
scat = &rm->m_sg[sg];
scat = &rm->data.m_sg[sg];
sent = 0;
i = 0;
@@ -600,7 +602,7 @@ int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm,
* or when requested by the user. Right now, we let
* the application choose.
*/
if (rm->m_rdma_op && rm->m_rdma_op->r_fence)
if (rm->rdma.m_rdma_op && rm->rdma.m_rdma_op->r_fence)
send_flags = IB_SEND_FENCE;
/*
@@ -619,7 +621,7 @@ int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm,
}
/* if there's data reference it with a chain of work reqs */
for (; i < work_alloc && scat != &rm->m_sg[rm->m_count]; i++) {
for (; i < work_alloc && scat != &rm->data.m_sg[rm->data.m_count]; i++) {
unsigned int len;
send = &ic->i_sends[pos];
@@ -697,7 +699,7 @@ add_header:
sent += sizeof(struct rds_header);
/* if we finished the message then send completion owns it */
if (scat == &rm->m_sg[rm->m_count]) {
if (scat == &rm->data.m_sg[rm->data.m_count]) {
prev->s_rm = ic->i_rm;
prev->s_wr.send_flags |= IB_SEND_SIGNALED | IB_SEND_SOLICITED;
ic->i_rm = NULL;