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IB/isert: Initialize T10-PI resources

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Introduce pi_context to hold relevant RDMA protection resources.
We eliminate data_key_valid boolean and replace it with indicators
container to indicate:
- Is the descriptor protected (registered via signature MR)
- Is the data_mr key valid (can spare LOCAL_INV WR)
- Is the prot_mr key valid (can spare LOCAL_INV WR)
- Is the sig_mr key valid (can spare LOCAL_INV WR)

Upon connection establishment check if network portal is T10-PI
enabled and allocate T10-PI resources if necessary, allocate
signature enabled memory regions and mark connection queue-pair
as signature enabled.

(Fix context change for v3.14-rc6 code - nab)

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Sagi Grimberg
2014-02-19 17:50:23 +02:00
committed by Nicholas Bellinger
parent e3d7e4c30c
commit d3e125dac1
2 changed files with 110 additions and 17 deletions
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23
drivers/infiniband/ulp/isert/ib_isert.h
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@@ -50,11 +50,25 @@ struct iser_tx_desc {
struct ib_send_wr send_wr;
} __packed;
enum isert_indicator {
ISERT_PROTECTED = 1 << 0,
ISERT_DATA_KEY_VALID = 1 << 1,
ISERT_PROT_KEY_VALID = 1 << 2,
ISERT_SIG_KEY_VALID = 1 << 3,
};
struct pi_context {
struct ib_mr *prot_mr;
struct ib_fast_reg_page_list *prot_frpl;
struct ib_mr *sig_mr;
};
struct fast_reg_descriptor {
struct list_head list;
struct ib_mr *data_mr;
struct ib_fast_reg_page_list *data_frpl;
bool valid;
struct list_head list;
struct ib_mr *data_mr;
struct ib_fast_reg_page_list *data_frpl;
u8 ind;
struct pi_context *pi_ctx;
};
struct isert_data_buf {
@@ -149,6 +163,7 @@ struct isert_cq_desc {
struct isert_device {
int use_fastreg;
bool pi_capable;
int cqs_used;
int refcount;
int cq_active_qps[ISERT_MAX_CQ];