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IB/rdmavt: Initialize and teardown of qpn table

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Add table init as well as teardown for handling qpn maps. Drivers can still
provide this functionality by setting the QP_INIT_DRIVER bit.

Reviewed-by: Ira Weiny <[email protected]>
Reviewed-by: Mike Marciniszyn <[email protected]>
Signed-off-by: Dennis Dalessandro <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>
This commit is contained in:
Dennis Dalessandro 2016-01-06 10:04:46 -08:00 • committed by Doug Ledford
commit 0acb0cc7ec
5 changed files with 263 additions and 13 deletions
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9
include/rdma/rdma_vt.h
View file

@ -172,7 +172,13 @@ struct rvt_driver_params {
* For instance special module parameters. Goes here.
*/
unsigned int lkey_table_size;
unsigned int qp_table_size;
int qpn_start;
int qpn_inc;
int qpn_res_start;
int qpn_res_end;
int nports;
u8 qos_shift;
};
/* Protection domain */
@ -205,6 +211,7 @@ struct rvt_driver_provided {
int (*port_callback)(struct ib_device *, u8, struct kobject *);
const char * (*get_card_name)(struct rvt_dev_info *rdi);
struct pci_dev * (*get_pci_dev)(struct rvt_dev_info *rdi);
void (*free_all_qps)(struct rvt_dev_info *rdi);
/*--------------------*/
/* Optional functions */
@ -245,6 +252,8 @@ struct rvt_dev_info {
int flags;
struct rvt_ibport **ports;
struct rvt_qp_ibdev *qp_dev;
};
static inline struct rvt_pd *ibpd_to_rvtpd(struct ib_pd *ibpd)

33
include/rdma/rdmavt_qp.h
View file

@ -259,4 +259,37 @@ struct rvt_srq {
u32 limit;
};
#define RVT_QPN_MAX BIT(24)
#define RVT_QPNMAP_ENTRIES (RVT_QPN_MAX / PAGE_SIZE / BITS_PER_BYTE)
#define RVT_BITS_PER_PAGE (PAGE_SIZE * BITS_PER_BYTE)
#define RVT_BITS_PER_PAGE_MASK (RVT_BITS_PER_PAGE - 1)
/*
* QPN-map pages start out as NULL, they get allocated upon
* first use and are never deallocated. This way,
* large bitmaps are not allocated unless large numbers of QPs are used.
*/
struct rvt_qpn_map {
void *page;
};
struct rvt_qpn_table {
spinlock_t lock; /* protect changes to the qp table */
unsigned flags; /* flags for QP0/1 allocated for each port */
u32 last; /* last QP number allocated */
u32 nmaps; /* size of the map table */
u16 limit;
u8 incr;
/* bit map of free QP numbers other than 0/1 */
struct rvt_qpn_map map[RVT_QPNMAP_ENTRIES];
};
struct rvt_qp_ibdev {
u32 qp_table_size;
u32 qp_table_bits;
struct rvt_qp __rcu **qp_table;
spinlock_t qpt_lock; /* qptable lock */
struct rvt_qpn_table qpn_table;
};
#endif /* DEF_RDMAVT_INCQP_H */