[mirror_ubuntu-jammy-kernel.git] / net / smc / smc_ib.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Shared Memory Communications over RDMA (SMC-R) and RoCE
 *
 *  Definitions for IB environment
 *
 *  Copyright IBM Corp. 2016
 *
 *  Author(s):  Ursula Braun <Ursula Braun@linux.vnet.ibm.com>
 */

#ifndef _SMC_IB_H
#define _SMC_IB_H

#include <linux/interrupt.h>
#include <linux/if_ether.h>
#include <linux/wait.h>
#include <rdma/ib_verbs.h>
#include <net/smc.h>

#define SMC_MAX_PORTS			2	/* Max # of ports */
#define SMC_GID_SIZE			sizeof(union ib_gid)

#define SMC_IB_MAX_SEND_SGE		2

struct smc_ib_devices {			/* list of smc ib devices definition */
	struct list_head	list;
	spinlock_t		lock;	/* protects list of smc ib devices */
};

extern struct smc_ib_devices	smc_ib_devices; /* list of smc ib devices */

struct smc_ib_device {				/* ib-device infos for smc */
	struct list_head	list;
	struct ib_device	*ibdev;
	struct ib_port_attr	pattr[SMC_MAX_PORTS];	/* ib dev. port attrs */
	struct ib_event_handler	event_handler;	/* global ib_event handler */
	struct ib_cq		*roce_cq_send;	/* send completion queue */
	struct ib_cq		*roce_cq_recv;	/* recv completion queue */
	struct tasklet_struct	send_tasklet;	/* called by send cq handler */
	struct tasklet_struct	recv_tasklet;	/* called by recv cq handler */
	char			mac[SMC_MAX_PORTS][ETH_ALEN];
						/* mac address per port*/
	u8			pnetid[SMC_MAX_PORTS][SMC_MAX_PNETID_LEN];
						/* pnetid per port */
	bool			pnetid_by_user[SMC_MAX_PORTS];
						/* pnetid defined by user? */
	u8			initialized : 1; /* ib dev CQ, evthdl done */
	struct work_struct	port_event_work;
	unsigned long		port_event_mask;
	DECLARE_BITMAP(ports_going_away, SMC_MAX_PORTS);
	atomic_t		lnk_cnt;	/* number of links on ibdev */
	wait_queue_head_t	lnks_deleted;	/* wait 4 removal of all links*/
};

struct smc_buf_desc;
struct smc_link;

int smc_ib_register_client(void) __init;
void smc_ib_unregister_client(void);
bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport);
int smc_ib_buf_map_sg(struct smc_ib_device *smcibdev,
		      struct smc_buf_desc *buf_slot,
		      enum dma_data_direction data_direction);
void smc_ib_buf_unmap_sg(struct smc_ib_device *smcibdev,
			 struct smc_buf_desc *buf_slot,
			 enum dma_data_direction data_direction);
void smc_ib_dealloc_protection_domain(struct smc_link *lnk);
int smc_ib_create_protection_domain(struct smc_link *lnk);
void smc_ib_destroy_queue_pair(struct smc_link *lnk);
int smc_ib_create_queue_pair(struct smc_link *lnk);
int smc_ib_ready_link(struct smc_link *lnk);
int smc_ib_modify_qp_rts(struct smc_link *lnk);
int smc_ib_modify_qp_reset(struct smc_link *lnk);
long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev);
int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags,
			     struct smc_buf_desc *buf_slot);
void smc_ib_put_memory_region(struct ib_mr *mr);
void smc_ib_sync_sg_for_cpu(struct smc_ib_device *smcibdev,
			    struct smc_buf_desc *buf_slot,
			    enum dma_data_direction data_direction);
void smc_ib_sync_sg_for_device(struct smc_ib_device *smcibdev,
			       struct smc_buf_desc *buf_slot,
			       enum dma_data_direction data_direction);
int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport,
			 unsigned short vlan_id, u8 gid[], u8 *sgid_index);
#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
a4cf0443 UB	2	/*
	3	* Shared Memory Communications over RDMA (SMC-R) and RoCE
	4	*
	5	* Definitions for IB environment
	6	*
	7	* Copyright IBM Corp. 2016
	8	*
	9	* Author(s): Ursula Braun <Ursula Braun@linux.vnet.ibm.com>
	10	*/
	11
	12	#ifndef _SMC_IB_H
	13	#define _SMC_IB_H
	14
282ccf6e	15	#include <linux/interrupt.h>
143c0171	16	#include <linux/if_ether.h>
6dabd405	17	#include <linux/wait.h>
a4cf0443	18	#include <rdma/ib_verbs.h>
0afff91c	19	#include <net/smc.h>
a4cf0443 UB	20
	21	#define SMC_MAX_PORTS 2 /* Max # of ports */
	22	#define SMC_GID_SIZE sizeof(union ib_gid)
	23
f38ba179 UB	24	#define SMC_IB_MAX_SEND_SGE 2
f38ba179 UB	25
a4cf0443 UB	26	struct smc_ib_devices { /* list of smc ib devices definition */
	27	struct list_head list;
	28	spinlock_t lock; /* protects list of smc ib devices */
	29	};
	30
	31	extern struct smc_ib_devices smc_ib_devices; /* list of smc ib devices */
	32
	33	struct smc_ib_device { /* ib-device infos for smc */
	34	struct list_head list;
	35	struct ib_device *ibdev;
	36	struct ib_port_attr pattr[SMC_MAX_PORTS]; /* ib dev. port attrs */
bd4ad577	37	struct ib_event_handler event_handler; /* global ib_event handler */
f38ba179 UB	38	struct ib_cq roce_cq_send; / send completion queue */
	39	struct ib_cq roce_cq_recv; / recv completion queue */
	40	struct tasklet_struct send_tasklet; /* called by send cq handler */
	41	struct tasklet_struct recv_tasklet; /* called by recv cq handler */
143c0171 UB	42	char mac[SMC_MAX_PORTS][ETH_ALEN];
143c0171 UB	43	/* mac address per port*/
0afff91c UB	44	u8 pnetid[SMC_MAX_PORTS][SMC_MAX_PNETID_LEN];
0afff91c UB	45	/* pnetid per port */
890a2cb4 HW	46	bool pnetid_by_user[SMC_MAX_PORTS];
890a2cb4 HW	47	/* pnetid defined by user? */
a4cf0443	48	u8 initialized : 1; /* ib dev CQ, evthdl done */
bd4ad577 UB	49	struct work_struct port_event_work;
bd4ad577 UB	50	unsigned long port_event_mask;
c3d9494e	51	DECLARE_BITMAP(ports_going_away, SMC_MAX_PORTS);
6dabd405 UB	52	atomic_t lnk_cnt; /* number of links on ibdev */
6dabd405 UB	53	wait_queue_head_t lnks_deleted; /* wait 4 removal of all links*/
a4cf0443 UB	54	};
a4cf0443 UB	55
cd6851f3	56	struct smc_buf_desc;
f38ba179	57	struct smc_link;
cd6851f3	58
a4cf0443 UB	59	int smc_ib_register_client(void) __init;
	60	void smc_ib_unregister_client(void);
	61	bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport);
a3fe3d01 UB	62	int smc_ib_buf_map_sg(struct smc_ib_device *smcibdev,
	63	struct smc_buf_desc *buf_slot,
	64	enum dma_data_direction data_direction);
	65	void smc_ib_buf_unmap_sg(struct smc_ib_device *smcibdev,
	66	struct smc_buf_desc *buf_slot,
	67	enum dma_data_direction data_direction);
f38ba179 UB	68	void smc_ib_dealloc_protection_domain(struct smc_link *lnk);
	69	int smc_ib_create_protection_domain(struct smc_link *lnk);
	70	void smc_ib_destroy_queue_pair(struct smc_link *lnk);
	71	int smc_ib_create_queue_pair(struct smc_link *lnk);
bd4ad577 UB	72	int smc_ib_ready_link(struct smc_link *lnk);
	73	int smc_ib_modify_qp_rts(struct smc_link *lnk);
	74	int smc_ib_modify_qp_reset(struct smc_link *lnk);
	75	long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev);
897e1c24 UB	76	int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags,
	77	struct smc_buf_desc *buf_slot);
	78	void smc_ib_put_memory_region(struct ib_mr *mr);
10428dd8 UB	79	void smc_ib_sync_sg_for_cpu(struct smc_ib_device *smcibdev,
	80	struct smc_buf_desc *buf_slot,
	81	enum dma_data_direction data_direction);
	82	void smc_ib_sync_sg_for_device(struct smc_ib_device *smcibdev,
	83	struct smc_buf_desc *buf_slot,
	84	enum dma_data_direction data_direction);
7005ada6 UB	85	int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport,
7005ada6 UB	86	unsigned short vlan_id, u8 gid[], u8 *sgid_index);
a4cf0443	87	#endif