[mirror_ubuntu-zesty-kernel.git] / drivers / infiniband / ulp / isert / ib_isert.h

#include <linux/socket.h>
#include <linux/in.h>
#include <linux/in6.h>
#include <rdma/ib_verbs.h>
#include <rdma/rdma_cm.h>

#define DRV_NAME	"isert"
#define PFX		DRV_NAME ": "

#define isert_dbg(fmt, arg...)				 \
	do {						 \
		if (unlikely(isert_debug_level > 2))	 \
			printk(KERN_DEBUG PFX "%s: " fmt,\
				__func__ , ## arg);	 \
	} while (0)

#define isert_warn(fmt, arg...)				\
	do {						\
		if (unlikely(isert_debug_level > 0))	\
			pr_warn(PFX "%s: " fmt,         \
				__func__ , ## arg);	\
	} while (0)

#define isert_info(fmt, arg...)				\
	do {						\
		if (unlikely(isert_debug_level > 1))	\
			pr_info(PFX "%s: " fmt,         \
				__func__ , ## arg);	\
	} while (0)

#define isert_err(fmt, arg...) \
	pr_err(PFX "%s: " fmt, __func__ , ## arg)

#define ISCSI_ISER_SG_TABLESIZE		256
#define ISER_FASTREG_LI_WRID		0xffffffffffffffffULL
#define ISER_BEACON_WRID               0xfffffffffffffffeULL

enum isert_desc_type {
	ISCSI_TX_CONTROL,
	ISCSI_TX_DATAIN
};

enum iser_ib_op_code {
	ISER_IB_RECV,
	ISER_IB_SEND,
	ISER_IB_RDMA_WRITE,
	ISER_IB_RDMA_READ,
};

enum iser_conn_state {
	ISER_CONN_INIT,
	ISER_CONN_UP,
	ISER_CONN_FULL_FEATURE,
	ISER_CONN_TERMINATING,
	ISER_CONN_DOWN,
};

struct iser_rx_desc {
	struct iser_hdr iser_header;
	struct iscsi_hdr iscsi_header;
	char		data[ISER_RECV_DATA_SEG_LEN];
	u64		dma_addr;
	struct ib_sge	rx_sg;
	char		pad[ISER_RX_PAD_SIZE];
} __packed;

struct iser_tx_desc {
	struct iser_hdr iser_header;
	struct iscsi_hdr iscsi_header;
	enum isert_desc_type type;
	u64		dma_addr;
	struct ib_sge	tx_sg[2];
	int		num_sge;
	struct isert_cmd *isert_cmd;
	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;
	u8				ind;
	struct pi_context	       *pi_ctx;
};

struct isert_data_buf {
	struct scatterlist     *sg;
	int			nents;
	u32			sg_off;
	u32			len; /* cur_rdma_length */
	u32			offset;
	unsigned int		dma_nents;
	enum dma_data_direction dma_dir;
};

enum {
	DATA = 0,
	PROT = 1,
	SIG = 2,
};

struct isert_rdma_wr {
	struct isert_cmd	*isert_cmd;
	enum iser_ib_op_code	iser_ib_op;
	struct ib_sge		*ib_sge;
	struct ib_sge		s_ib_sge;
	int			send_wr_num;
	struct ib_send_wr	*send_wr;
	struct ib_send_wr	s_send_wr;
	struct ib_sge		ib_sg[3];
	struct isert_data_buf	data;
	struct isert_data_buf	prot;
	struct fast_reg_descriptor *fr_desc;
};

struct isert_cmd {
	uint32_t		read_stag;
	uint32_t		write_stag;
	uint64_t		read_va;
	uint64_t		write_va;
	u64			pdu_buf_dma;
	u32			pdu_buf_len;
	struct isert_conn	*conn;
	struct iscsi_cmd	*iscsi_cmd;
	struct iser_tx_desc	tx_desc;
	struct isert_rdma_wr	rdma_wr;
	struct work_struct	comp_work;
};

struct isert_device;

struct isert_conn {
	enum iser_conn_state	state;
	int			post_recv_buf_count;
	u32			responder_resources;
	u32			initiator_depth;
	bool			pi_support;
	u32			max_sge;
	char			*login_buf;
	char			*login_req_buf;
	char			*login_rsp_buf;
	u64			login_req_dma;
	int			login_req_len;
	u64			login_rsp_dma;
	unsigned int		rx_desc_head;
	struct iser_rx_desc	*rx_descs;
	struct ib_recv_wr	rx_wr[ISERT_MIN_POSTED_RX];
	struct iscsi_conn	*conn;
	struct list_head	accept_node;
	struct completion	login_comp;
	struct completion	login_req_comp;
	struct iser_tx_desc	login_tx_desc;
	struct rdma_cm_id	*cm_id;
	struct ib_qp		*qp;
	struct isert_device	*device;
	struct mutex		mutex;
	struct completion	wait;
	struct completion	wait_comp_err;
	struct kref		kref;
	struct list_head	fr_pool;
	int			fr_pool_size;
	/* lock to protect fastreg pool */
	spinlock_t		pool_lock;
	struct work_struct	release_work;
	struct ib_recv_wr       beacon;
	bool                    logout_posted;
};

#define ISERT_MAX_CQ 64

/**
 * struct isert_comp - iSER completion context
 *
 * @device:     pointer to device handle
 * @cq:         completion queue
 * @wcs:        work completion array
 * @active_qps: Number of active QPs attached
 *              to completion context
 * @work:       completion work handle
 */
struct isert_comp {
	struct isert_device     *device;
	struct ib_cq		*cq;
	struct ib_wc		 wcs[16];
	int                      active_qps;
	struct work_struct	 work;
};

struct isert_device {
	int			use_fastreg;
	bool			pi_capable;
	int			refcount;
	struct ib_device	*ib_device;
	struct ib_pd		*pd;
	struct isert_comp	*comps;
	int                     comps_used;
	struct list_head	dev_node;
	struct ib_device_attr	dev_attr;
	int			(*reg_rdma_mem)(struct iscsi_conn *conn,
						    struct iscsi_cmd *cmd,
						    struct isert_rdma_wr *wr);
	void			(*unreg_rdma_mem)(struct isert_cmd *isert_cmd,
						  struct isert_conn *isert_conn);
};

struct isert_np {
	struct iscsi_np         *np;
	struct semaphore	np_sem;
	struct rdma_cm_id	*np_cm_id;
	struct mutex		np_accept_mutex;
	struct list_head	np_accept_list;
};
Commit	Line	Data
b8d26b3b NB	1	#include <linux/socket.h>
	2	#include <linux/in.h>
	3	#include <linux/in6.h>
	4	#include <rdma/ib_verbs.h>
	5	#include <rdma/rdma_cm.h>
	6
24f412dd SG	7	#define DRV_NAME "isert"
	8	#define PFX DRV_NAME ": "
	9
	10	#define isert_dbg(fmt, arg...) \
	11	do { \
	12	if (unlikely(isert_debug_level > 2)) \
	13	printk(KERN_DEBUG PFX "%s: " fmt,\
	14	__func__ , ## arg); \
	15	} while (0)
	16
	17	#define isert_warn(fmt, arg...) \
	18	do { \
	19	if (unlikely(isert_debug_level > 0)) \
	20	pr_warn(PFX "%s: " fmt, \
	21	__func__ , ## arg); \
	22	} while (0)
	23
	24	#define isert_info(fmt, arg...) \
	25	do { \
	26	if (unlikely(isert_debug_level > 1)) \
	27	pr_info(PFX "%s: " fmt, \
	28	__func__ , ## arg); \
	29	} while (0)
	30
	31	#define isert_err(fmt, arg...) \
	32	pr_err(PFX "%s: " fmt, __func__ , ## arg)
	33
59464ef4	34	#define ISCSI_ISER_SG_TABLESIZE 256
9bb4ca68	35	#define ISER_FASTREG_LI_WRID 0xffffffffffffffffULL
bdf20e72	36	#define ISER_BEACON_WRID 0xfffffffffffffffeULL
b8d26b3b NB	37
	38	enum isert_desc_type {
	39	ISCSI_TX_CONTROL,
	40	ISCSI_TX_DATAIN
	41	};
	42
	43	enum iser_ib_op_code {
	44	ISER_IB_RECV,
	45	ISER_IB_SEND,
	46	ISER_IB_RDMA_WRITE,
	47	ISER_IB_RDMA_READ,
	48	};
	49
	50	enum iser_conn_state {
	51	ISER_CONN_INIT,
	52	ISER_CONN_UP,
128e9cc8	53	ISER_CONN_FULL_FEATURE,
b8d26b3b NB	54	ISER_CONN_TERMINATING,
	55	ISER_CONN_DOWN,
	56	};
	57
	58	struct iser_rx_desc {
	59	struct iser_hdr iser_header;
	60	struct iscsi_hdr iscsi_header;
	61	char data[ISER_RECV_DATA_SEG_LEN];
	62	u64 dma_addr;
	63	struct ib_sge rx_sg;
	64	char pad[ISER_RX_PAD_SIZE];
	65	} __packed;
	66
	67	struct iser_tx_desc {
	68	struct iser_hdr iser_header;
	69	struct iscsi_hdr iscsi_header;
	70	enum isert_desc_type type;
	71	u64 dma_addr;
	72	struct ib_sge tx_sg[2];
	73	int num_sge;
	74	struct isert_cmd *isert_cmd;
	75	struct ib_send_wr send_wr;
	76	} __packed;
	77
d3e125da SG	78	enum isert_indicator {
	79	ISERT_PROTECTED = 1 << 0,
	80	ISERT_DATA_KEY_VALID = 1 << 1,
	81	ISERT_PROT_KEY_VALID = 1 << 2,
	82	ISERT_SIG_KEY_VALID = 1 << 3,
	83	};
	84
	85	struct pi_context {
	86	struct ib_mr *prot_mr;
	87	struct ib_fast_reg_page_list *prot_frpl;
	88	struct ib_mr *sig_mr;
	89	};
	90
59464ef4	91	struct fast_reg_descriptor {
d3e125da SG	92	struct list_head list;
	93	struct ib_mr *data_mr;
	94	struct ib_fast_reg_page_list *data_frpl;
	95	u8 ind;
	96	struct pi_context *pi_ctx;
59464ef4 VP	97	};
59464ef4 VP	98
e3d7e4c3 SG	99	struct isert_data_buf {
	100	struct scatterlist *sg;
	101	int nents;
	102	u32 sg_off;
	103	u32 len; /* cur_rdma_length */
	104	u32 offset;
	105	unsigned int dma_nents;
	106	enum dma_data_direction dma_dir;
	107	};
	108
570db170 SG	109	enum {
	110	DATA = 0,
	111	PROT = 1,
	112	SIG = 2,
	113	};
	114
b8d26b3b	115	struct isert_rdma_wr {
b8d26b3b NB	116	struct isert_cmd *isert_cmd;
	117	enum iser_ib_op_code iser_ib_op;
	118	struct ib_sge *ib_sge;
59464ef4	119	struct ib_sge s_ib_sge;
b8d26b3b NB	120	int send_wr_num;
b8d26b3b NB	121	struct ib_send_wr *send_wr;
59464ef4	122	struct ib_send_wr s_send_wr;
570db170	123	struct ib_sge ib_sg[3];
e3d7e4c3	124	struct isert_data_buf data;
9e961ae7	125	struct isert_data_buf prot;
59464ef4	126	struct fast_reg_descriptor *fr_desc;
b8d26b3b NB	127	};
	128
	129	struct isert_cmd {
	130	uint32_t read_stag;
	131	uint32_t write_stag;
	132	uint64_t read_va;
	133	uint64_t write_va;
dbbc5d11 NB	134	u64 pdu_buf_dma;
dbbc5d11 NB	135	u32 pdu_buf_len;
b8d26b3b	136	struct isert_conn *conn;
d703ce2f	137	struct iscsi_cmd *iscsi_cmd;
b8d26b3b NB	138	struct iser_tx_desc tx_desc;
	139	struct isert_rdma_wr rdma_wr;
	140	struct work_struct comp_work;
	141	};
	142
	143	struct isert_device;
	144
	145	struct isert_conn {
	146	enum iser_conn_state state;
b8d26b3b	147	int post_recv_buf_count;
b8d26b3b NB	148	u32 responder_resources;
b8d26b3b NB	149	u32 initiator_depth;
23a548ee	150	bool pi_support;
b8d26b3b NB	151	u32 max_sge;
	152	char *login_buf;
	153	char *login_req_buf;
	154	char *login_rsp_buf;
	155	u64 login_req_dma;
2371e5da	156	int login_req_len;
b8d26b3b	157	u64 login_rsp_dma;
dac6ab30 SG	158	unsigned int rx_desc_head;
	159	struct iser_rx_desc *rx_descs;
	160	struct ib_recv_wr rx_wr[ISERT_MIN_POSTED_RX];
b8d26b3b	161	struct iscsi_conn *conn;
dac6ab30 SG	162	struct list_head accept_node;
dac6ab30 SG	163	struct completion login_comp;
2371e5da	164	struct completion login_req_comp;
dac6ab30 SG	165	struct iser_tx_desc login_tx_desc;
	166	struct rdma_cm_id *cm_id;
	167	struct ib_qp *qp;
	168	struct isert_device *device;
	169	struct mutex mutex;
	170	struct completion wait;
	171	struct completion wait_comp_err;
	172	struct kref kref;
	173	struct list_head fr_pool;
	174	int fr_pool_size;
a3a5a826	175	/* lock to protect fastreg pool */
dac6ab30	176	spinlock_t pool_lock;
b02efbfc	177	struct work_struct release_work;
bdf20e72	178	struct ib_recv_wr beacon;
991bb764	179	bool logout_posted;
b8d26b3b NB	180	};
	181
	182	#define ISERT_MAX_CQ 64
	183
4a295bae SG	184	/**
	185	* struct isert_comp - iSER completion context
	186	*
	187	* @device: pointer to device handle
6f0fae3d	188	* @cq: completion queue
36ea63b5	189	* @wcs: work completion array
4a295bae SG	190	* @active_qps: Number of active QPs attached
4a295bae SG	191	* to completion context
6f0fae3d	192	* @work: completion work handle
4a295bae SG	193	*/
4a295bae SG	194	struct isert_comp {
6f0fae3d SG	195	struct isert_device *device;
6f0fae3d SG	196	struct ib_cq *cq;
36ea63b5	197	struct ib_wc wcs[16];
4a295bae	198	int active_qps;
6f0fae3d	199	struct work_struct work;
b8d26b3b NB	200	};
	201
	202	struct isert_device {
a3a5a826	203	int use_fastreg;
d3e125da	204	bool pi_capable;
b8d26b3b	205	int refcount;
b8d26b3b	206	struct ib_device *ib_device;
67cb3949	207	struct ib_pd *pd;
4a295bae SG	208	struct isert_comp *comps;
4a295bae SG	209	int comps_used;
b8d26b3b	210	struct list_head dev_node;
59464ef4	211	struct ib_device_attr dev_attr;
d40945d8 VP	212	int (reg_rdma_mem)(struct iscsi_conn conn,
	213	struct iscsi_cmd *cmd,
	214	struct isert_rdma_wr *wr);
	215	void (unreg_rdma_mem)(struct isert_cmd isert_cmd,
	216	struct isert_conn *isert_conn);
b8d26b3b NB	217	};
	218
	219	struct isert_np {
ca6c1d82	220	struct iscsi_np *np;
531b7bf4	221	struct semaphore np_sem;
b8d26b3b NB	222	struct rdma_cm_id *np_cm_id;
	223	struct mutex np_accept_mutex;
	224	struct list_head np_accept_list;
b8d26b3b	225	};