IB/srp: use IB_PD_UNSAFE_GLOBAL_RKEY
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 579b8ae..5ed1e88 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -1262,6 +1262,7 @@
{
struct srp_target_port *target = ch->target;
struct srp_device *dev = target->srp_host->srp_dev;
+ struct ib_pd *pd = target->pd;
struct ib_pool_fmr *fmr;
u64 io_addr = 0;
@@ -1273,9 +1274,9 @@
if (state->npages == 0)
return 0;
- if (state->npages == 1 && target->global_mr) {
+ if (state->npages == 1 && (pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY)) {
srp_map_desc(state, state->base_dma_addr, state->dma_len,
- target->global_mr->rkey);
+ pd->unsafe_global_rkey);
goto reset_state;
}
@@ -1315,6 +1316,7 @@
{
struct srp_target_port *target = ch->target;
struct srp_device *dev = target->srp_host->srp_dev;
+ struct ib_pd *pd = target->pd;
struct ib_send_wr *bad_wr;
struct ib_reg_wr wr;
struct srp_fr_desc *desc;
@@ -1326,12 +1328,12 @@
WARN_ON_ONCE(!dev->use_fast_reg);
- if (sg_nents == 1 && target->global_mr) {
+ if (sg_nents == 1 && (pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY)) {
unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0;
srp_map_desc(state, sg_dma_address(state->sg) + sg_offset,
sg_dma_len(state->sg) - sg_offset,
- target->global_mr->rkey);
+ pd->unsafe_global_rkey);
if (sg_offset_p)
*sg_offset_p = 0;
return 1;
@@ -1491,7 +1493,7 @@
for_each_sg(scat, sg, count, i) {
srp_map_desc(state, ib_sg_dma_address(dev->dev, sg),
ib_sg_dma_len(dev->dev, sg),
- target->global_mr->rkey);
+ target->pd->unsafe_global_rkey);
}
return 0;
@@ -1591,6 +1593,7 @@
struct srp_request *req)
{
struct srp_target_port *target = ch->target;
+ struct ib_pd *pd = target->pd;
struct scatterlist *scat;
struct srp_cmd *cmd = req->cmd->buf;
int len, nents, count, ret;
@@ -1626,7 +1629,7 @@
fmt = SRP_DATA_DESC_DIRECT;
len = sizeof (struct srp_cmd) + sizeof (struct srp_direct_buf);
- if (count == 1 && target->global_mr) {
+ if (count == 1 && (pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY)) {
/*
* The midlayer only generated a single gather/scatter
* entry, or DMA mapping coalesced everything to a
@@ -1636,7 +1639,7 @@
struct srp_direct_buf *buf = (void *) cmd->add_data;
buf->va = cpu_to_be64(ib_sg_dma_address(ibdev, scat));
- buf->key = cpu_to_be32(target->global_mr->rkey);
+ buf->key = cpu_to_be32(pd->unsafe_global_rkey);
buf->len = cpu_to_be32(ib_sg_dma_len(ibdev, scat));
req->nmdesc = 0;
@@ -1709,14 +1712,14 @@
memcpy(indirect_hdr->desc_list, req->indirect_desc,
count * sizeof (struct srp_direct_buf));
- if (!target->global_mr) {
+ if (!(pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY)) {
ret = srp_map_idb(ch, req, state.gen.next, state.gen.end,
idb_len, &idb_rkey);
if (ret < 0)
goto unmap;
req->nmdesc++;
} else {
- idb_rkey = cpu_to_be32(target->global_mr->rkey);
+ idb_rkey = cpu_to_be32(pd->unsafe_global_rkey);
}
indirect_hdr->table_desc.va = cpu_to_be64(req->indirect_dma_addr);
@@ -3268,8 +3271,8 @@
target->io_class = SRP_REV16A_IB_IO_CLASS;
target->scsi_host = target_host;
target->srp_host = host;
+ target->pd = host->srp_dev->pd;
target->lkey = host->srp_dev->pd->local_dma_lkey;
- target->global_mr = host->srp_dev->global_mr;
target->cmd_sg_cnt = cmd_sg_entries;
target->sg_tablesize = indirect_sg_entries ? : cmd_sg_entries;
target->allow_ext_sg = allow_ext_sg;
@@ -3524,6 +3527,7 @@
struct srp_host *host;
int mr_page_shift, p;
u64 max_pages_per_mr;
+ unsigned int flags = 0;
srp_dev = kzalloc(sizeof(*srp_dev), GFP_KERNEL);
if (!srp_dev)
@@ -3558,6 +3562,10 @@
srp_dev->use_fmr = !srp_dev->use_fast_reg && srp_dev->has_fmr;
}
+ if (never_register || !register_always ||
+ (!srp_dev->has_fmr && !srp_dev->has_fr))
+ flags |= IB_PD_UNSAFE_GLOBAL_RKEY;
+
if (srp_dev->use_fast_reg) {
srp_dev->max_pages_per_mr =
min_t(u32, srp_dev->max_pages_per_mr,
@@ -3573,19 +3581,10 @@
INIT_LIST_HEAD(&srp_dev->dev_list);
srp_dev->dev = device;
- srp_dev->pd = ib_alloc_pd(device, 0);
+ srp_dev->pd = ib_alloc_pd(device, flags);
if (IS_ERR(srp_dev->pd))
goto free_dev;
- if (never_register || !register_always ||
- (!srp_dev->has_fmr && !srp_dev->has_fr)) {
- srp_dev->global_mr = ib_get_dma_mr(srp_dev->pd,
- IB_ACCESS_LOCAL_WRITE |
- IB_ACCESS_REMOTE_READ |
- IB_ACCESS_REMOTE_WRITE);
- if (IS_ERR(srp_dev->global_mr))
- goto err_pd;
- }
for (p = rdma_start_port(device); p <= rdma_end_port(device); ++p) {
host = srp_add_port(srp_dev, p);
@@ -3596,9 +3595,6 @@
ib_set_client_data(device, &srp_client, srp_dev);
return;
-err_pd:
- ib_dealloc_pd(srp_dev->pd);
-
free_dev:
kfree(srp_dev);
}
@@ -3638,8 +3634,6 @@
kfree(host);
}
- if (srp_dev->global_mr)
- ib_dereg_mr(srp_dev->global_mr);
ib_dealloc_pd(srp_dev->pd);
kfree(srp_dev);
diff --git a/drivers/infiniband/ulp/srp/ib_srp.h b/drivers/infiniband/ulp/srp/ib_srp.h
index 26bb9b0..21c6969 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.h
+++ b/drivers/infiniband/ulp/srp/ib_srp.h
@@ -90,7 +90,6 @@
struct list_head dev_list;
struct ib_device *dev;
struct ib_pd *pd;
- struct ib_mr *global_mr;
u64 mr_page_mask;
int mr_page_size;
int mr_max_size;
@@ -179,7 +178,7 @@
spinlock_t lock;
/* read only in the hot path */
- struct ib_mr *global_mr;
+ struct ib_pd *pd;
struct srp_rdma_ch *ch;
u32 ch_count;
u32 lkey;