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IB/iser: Introduce iser_reg_ops

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Move all the per-device function pointers to an easy
extensible iser_reg_ops structure that contains all
the iser registration operations.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Sagi Grimberg
2015-08-06 18:32:56 +03:00
committed by Doug Ledford
parent 8c18ed03a9
commit 48afbff673
4 changed files with 75 additions and 45 deletions
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39
drivers/infiniband/ulp/iser/iscsi_iser.h
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@@ -325,6 +325,25 @@ struct iser_comp {
int active_qps;
};
/**
* struct iser_device - Memory registration operations
* per-device registration schemes
*
* @alloc_reg_res: Allocate registration resources
* @free_reg_res: Free registration resources
* @reg_rdma_mem: Register memory buffers
* @unreg_rdma_mem: Un-register memory buffers
*/
struct iser_reg_ops {
int (*alloc_reg_res)(struct ib_conn *ib_conn,
unsigned cmds_max);
void (*free_reg_res)(struct ib_conn *ib_conn);
int (*reg_rdma_mem)(struct iscsi_iser_task *iser_task,
enum iser_data_dir cmd_dir);
void (*unreg_rdma_mem)(struct iscsi_iser_task *iser_task,
enum iser_data_dir cmd_dir);
};
/**
* struct iser_device - iSER device handle
*
@@ -338,11 +357,7 @@ struct iser_comp {
* @comps_used: Number of completion contexts used, Min between online
* cpus and device max completion vectors
* @comps: Dinamically allocated array of completion handlers
* Memory registration pool Function pointers (FMR or Fastreg):
* @iser_alloc_rdma_reg_res: Allocation of memory regions pool
* @iser_free_rdma_reg_res: Free of memory regions pool
* @iser_reg_rdma_mem: Memory registration routine
* @iser_unreg_rdma_mem: Memory deregistration routine
* @reg_ops: Registration ops
*/
struct iser_device {
struct ib_device *ib_device;
@@ -354,13 +369,7 @@ struct iser_device {
int refcount;
int comps_used;
struct iser_comp *comps;
int (*iser_alloc_rdma_reg_res)(struct ib_conn *ib_conn,
unsigned cmds_max);
void (*iser_free_rdma_reg_res)(struct ib_conn *ib_conn);
int (*iser_reg_rdma_mem)(struct iscsi_iser_task *iser_task,
enum iser_data_dir cmd_dir);
void (*iser_unreg_rdma_mem)(struct iscsi_iser_task *iser_task,
enum iser_data_dir cmd_dir);
struct iser_reg_ops *reg_ops;
};
#define ISER_CHECK_GUARD 0xc0
@@ -563,6 +572,8 @@ extern int iser_debug_level;
extern bool iser_pi_enable;
extern int iser_pi_guard;
int iser_assign_reg_ops(struct iser_device *device);
int iser_send_control(struct iscsi_conn *conn,
struct iscsi_task *task);
@@ -636,9 +647,9 @@ int iser_initialize_task_headers(struct iscsi_task *task,
struct iser_tx_desc *tx_desc);
int iser_alloc_rx_descriptors(struct iser_conn *iser_conn,
struct iscsi_session *session);
int iser_create_fmr_pool(struct ib_conn *ib_conn, unsigned cmds_max);
int iser_alloc_fmr_pool(struct ib_conn *ib_conn, unsigned cmds_max);
void iser_free_fmr_pool(struct ib_conn *ib_conn);
int iser_create_fastreg_pool(struct ib_conn *ib_conn, unsigned cmds_max);
int iser_alloc_fastreg_pool(struct ib_conn *ib_conn, unsigned cmds_max);
void iser_free_fastreg_pool(struct ib_conn *ib_conn);
u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task,
enum iser_data_dir cmd_dir, sector_t *sector);