drivers/infiniband/hw/cxgb3/cxio_hal.h - linux - Git at Google

 /*
  * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
  *
  * This software is available to you under a choice of one of two
  * licenses.  You may choose to be licensed under the terms of the GNU
  * General Public License (GPL) Version 2, available from the file
  * COPYING in the main directory of this source tree, or the
  * OpenIB.org BSD license below:
  *
  *     Redistribution and use in source and binary forms, with or
  *     without modification, are permitted provided that the following
  *     conditions are met:
  *
  *      - Redistributions of source code must retain the above
  *        copyright notice, this list of conditions and the following
  *        disclaimer.
  *
  *      - Redistributions in binary form must reproduce the above
  *        copyright notice, this list of conditions and the following
  *        disclaimer in the documentation and/or other materials
  *        provided with the distribution.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
 #ifndef  __CXIO_HAL_H__
 #define  __CXIO_HAL_H__

 #include <linux/list.h>
 #include <linux/mutex.h>

 #include "t3_cpl.h"
 #include "t3cdev.h"
 #include "cxgb3_ctl_defs.h"
 #include "cxio_wr.h"

 #define T3_CTRL_QP_ID    FW_RI_SGEEC_START
 #define T3_CTL_QP_TID	 FW_RI_TID_START
 #define T3_CTRL_QP_SIZE_LOG2  8
 #define T3_CTRL_CQ_ID    0

 /* TBD */
 #define T3_MAX_NUM_RI (1<<15)
 #define T3_MAX_NUM_QP (1<<15)
 #define T3_MAX_NUM_CQ (1<<15)
 #define T3_MAX_NUM_PD (1<<15)
 #define T3_MAX_PBL_SIZE 256
 #define T3_MAX_RQ_SIZE 1024
 #define T3_MAX_NUM_STAG (1<<15)

 #define T3_STAG_UNSET 0xffffffff

 #define T3_MAX_DEV_NAME_LEN 32

 struct cxio_hal_ctrl_qp {
 	u32 wptr;
 	u32 rptr;
 	struct mutex lock;	/* for the wtpr, can sleep */
 	wait_queue_head_t waitq;/* wait for RspQ/CQE msg */
 	union t3_wr *workq;	/* the work request queue */
 	dma_addr_t dma_addr;	/* pci bus address of the workq */
 	DECLARE_PCI_UNMAP_ADDR(mapping)
 	void __iomem *doorbell;
 };

 struct cxio_hal_resource {
 	struct kfifo *tpt_fifo;
 	spinlock_t tpt_fifo_lock;
 	struct kfifo *qpid_fifo;
 	spinlock_t qpid_fifo_lock;
 	struct kfifo *cqid_fifo;
 	spinlock_t cqid_fifo_lock;
 	struct kfifo *pdid_fifo;
 	spinlock_t pdid_fifo_lock;
 };

 struct cxio_qpid_list {
 	struct list_head entry;
 	u32 qpid;
 };

 struct cxio_ucontext {
 	struct list_head qpids;
 	struct mutex lock;
 };

 struct cxio_rdev {
 	char dev_name[T3_MAX_DEV_NAME_LEN];
 	struct t3cdev *t3cdev_p;
 	struct rdma_info rnic_info;
 	struct adap_ports port_info;
 	struct cxio_hal_resource *rscp;
 	struct cxio_hal_ctrl_qp ctrl_qp;
 	void *ulp;
 	unsigned long qpshift;
 	u32 qpnr;
 	u32 qpmask;
 	struct cxio_ucontext uctx;
 	struct gen_pool *pbl_pool;
 	struct gen_pool *rqt_pool;
 	struct list_head entry;
 };

 static inline int cxio_num_stags(struct cxio_rdev *rdev_p)
 {
 	return min((int)T3_MAX_NUM_STAG, (int)((rdev_p->rnic_info.tpt_top - rdev_p->rnic_info.tpt_base) >> 5));
 }

 typedef void (*cxio_hal_ev_callback_func_t) (struct cxio_rdev * rdev_p,
 					     struct sk_buff * skb);

 #define RSPQ_CQID(rsp) (be32_to_cpu(rsp->cq_ptrid) & 0xffff)
 #define RSPQ_CQPTR(rsp) ((be32_to_cpu(rsp->cq_ptrid) >> 16) & 0xffff)
 #define RSPQ_GENBIT(rsp) ((be32_to_cpu(rsp->flags) >> 16) & 1)
 #define RSPQ_OVERFLOW(rsp) ((be32_to_cpu(rsp->flags) >> 17) & 1)
 #define RSPQ_AN(rsp) ((be32_to_cpu(rsp->flags) >> 18) & 1)
 #define RSPQ_SE(rsp) ((be32_to_cpu(rsp->flags) >> 19) & 1)
 #define RSPQ_NOTIFY(rsp) ((be32_to_cpu(rsp->flags) >> 20) & 1)
 #define RSPQ_CQBRANCH(rsp) ((be32_to_cpu(rsp->flags) >> 21) & 1)
 #define RSPQ_CREDIT_THRESH(rsp) ((be32_to_cpu(rsp->flags) >> 22) & 1)

 struct respQ_msg_t {
 	__be32 flags;		/* flit 0 */
 	__be32 cq_ptrid;
 	__be64 rsvd;		/* flit 1 */
 	struct t3_cqe cqe;	/* flits 2-3 */
 };

 enum t3_cq_opcode {
 	CQ_ARM_AN = 0x2,
 	CQ_ARM_SE = 0x6,
 	CQ_FORCE_AN = 0x3,
 	CQ_CREDIT_UPDATE = 0x7
 };

 int cxio_rdev_open(struct cxio_rdev *rdev);
 void cxio_rdev_close(struct cxio_rdev *rdev);
 int cxio_hal_cq_op(struct cxio_rdev *rdev, struct t3_cq *cq,
 		   enum t3_cq_opcode op, u32 credit);
 int cxio_hal_clear_qp_ctx(struct cxio_rdev *rdev, u32 qpid);
 int cxio_create_cq(struct cxio_rdev *rdev, struct t3_cq *cq);
 int cxio_destroy_cq(struct cxio_rdev *rdev, struct t3_cq *cq);
 int cxio_resize_cq(struct cxio_rdev *rdev, struct t3_cq *cq);
 void cxio_release_ucontext(struct cxio_rdev *rdev, struct cxio_ucontext *uctx);
 void cxio_init_ucontext(struct cxio_rdev *rdev, struct cxio_ucontext *uctx);
 int cxio_create_qp(struct cxio_rdev *rdev, u32 kernel_domain, struct t3_wq *wq,
 		   struct cxio_ucontext *uctx);
 int cxio_destroy_qp(struct cxio_rdev *rdev, struct t3_wq *wq,
 		    struct cxio_ucontext *uctx);
 int cxio_peek_cq(struct t3_wq *wr, struct t3_cq *cq, int opcode);
 int cxio_allocate_stag(struct cxio_rdev *rdev, u32 * stag, u32 pdid,
 		       enum tpt_mem_perm perm, u32 * pbl_size, u32 * pbl_addr);
 int cxio_register_phys_mem(struct cxio_rdev *rdev, u32 * stag, u32 pdid,
 			   enum tpt_mem_perm perm, u32 zbva, u64 to, u32 len,
 			   u8 page_size, __be64 *pbl, u32 *pbl_size,
 			   u32 *pbl_addr);
 int cxio_reregister_phys_mem(struct cxio_rdev *rdev, u32 * stag, u32 pdid,
 			   enum tpt_mem_perm perm, u32 zbva, u64 to, u32 len,
 			   u8 page_size, __be64 *pbl, u32 *pbl_size,
 			   u32 *pbl_addr);
 int cxio_dereg_mem(struct cxio_rdev *rdev, u32 stag, u32 pbl_size,
 		   u32 pbl_addr);
 int cxio_allocate_window(struct cxio_rdev *rdev, u32 * stag, u32 pdid);
 int cxio_deallocate_window(struct cxio_rdev *rdev, u32 stag);
 int cxio_rdma_init(struct cxio_rdev *rdev, struct t3_rdma_init_attr *attr);
 void cxio_register_ev_cb(cxio_hal_ev_callback_func_t ev_cb);
 void cxio_unregister_ev_cb(cxio_hal_ev_callback_func_t ev_cb);
 u32 cxio_hal_get_rhdl(void);
 void cxio_hal_put_rhdl(u32 rhdl);
 u32 cxio_hal_get_pdid(struct cxio_hal_resource *rscp);
 void cxio_hal_put_pdid(struct cxio_hal_resource *rscp, u32 pdid);
 int __init cxio_hal_init(void);
 void __exit cxio_hal_exit(void);
 void cxio_flush_rq(struct t3_wq *wq, struct t3_cq *cq, int count);
 void cxio_flush_sq(struct t3_wq *wq, struct t3_cq *cq, int count);
 void cxio_count_rcqes(struct t3_cq *cq, struct t3_wq *wq, int *count);
 void cxio_count_scqes(struct t3_cq *cq, struct t3_wq *wq, int *count);
 void cxio_flush_hw_cq(struct t3_cq *cq);
 int cxio_poll_cq(struct t3_wq *wq, struct t3_cq *cq, struct t3_cqe *cqe,
 		     u8 *cqe_flushed, u64 *cookie, u32 *credit);

 #define MOD "iw_cxgb3: "
 #define PDBG(fmt, args...) pr_debug(MOD fmt, ## args)

 #ifdef DEBUG
 void cxio_dump_tpt(struct cxio_rdev *rev, u32 stag);
 void cxio_dump_pbl(struct cxio_rdev *rev, u32 pbl_addr, uint len, u8 shift);
 void cxio_dump_wqe(union t3_wr *wqe);
 void cxio_dump_wce(struct t3_cqe *wce);
 void cxio_dump_rqt(struct cxio_rdev *rdev, u32 hwtid, int nents);
 void cxio_dump_tcb(struct cxio_rdev *rdev, u32 hwtid);
 #endif

 #endif
	/*
	* Copyright (c) 2006 Chelsio, Inc. All rights reserved.
	*
	* This software is available to you under a choice of one of two
	* licenses. You may choose to be licensed under the terms of the GNU
	* General Public License (GPL) Version 2, available from the file
	* COPYING in the main directory of this source tree, or the
	* OpenIB.org BSD license below:
	*
	* Redistribution and use in source and binary forms, with or
	* without modification, are permitted provided that the following
	* conditions are met:
	*
	* - Redistributions of source code must retain the above
	* copyright notice, this list of conditions and the following
	* disclaimer.
	*
	* - Redistributions in binary form must reproduce the above
	* copyright notice, this list of conditions and the following
	* disclaimer in the documentation and/or other materials
	* provided with the distribution.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	* SOFTWARE.
	*/
	#ifndef __CXIO_HAL_H__
	#define __CXIO_HAL_H__

	#include <linux/list.h>
	#include <linux/mutex.h>

	#include "t3_cpl.h"
	#include "t3cdev.h"
	#include "cxgb3_ctl_defs.h"
	#include "cxio_wr.h"

	#define T3_CTRL_QP_ID FW_RI_SGEEC_START
	#define T3_CTL_QP_TID FW_RI_TID_START
	#define T3_CTRL_QP_SIZE_LOG2 8
	#define T3_CTRL_CQ_ID 0

	/* TBD */
	#define T3_MAX_NUM_RI (1<<15)
	#define T3_MAX_NUM_QP (1<<15)
	#define T3_MAX_NUM_CQ (1<<15)
	#define T3_MAX_NUM_PD (1<<15)
	#define T3_MAX_PBL_SIZE 256
	#define T3_MAX_RQ_SIZE 1024
	#define T3_MAX_NUM_STAG (1<<15)

	#define T3_STAG_UNSET 0xffffffff

	#define T3_MAX_DEV_NAME_LEN 32

	struct cxio_hal_ctrl_qp {
	u32 wptr;
	u32 rptr;
	struct mutex lock; /* for the wtpr, can sleep */
	wait_queue_head_t waitq;/* wait for RspQ/CQE msg */
	union t3_wr workq; / the work request queue */
	dma_addr_t dma_addr; /* pci bus address of the workq */
	DECLARE_PCI_UNMAP_ADDR(mapping)
	void __iomem *doorbell;
	};

	struct cxio_hal_resource {
	struct kfifo *tpt_fifo;
	spinlock_t tpt_fifo_lock;
	struct kfifo *qpid_fifo;
	spinlock_t qpid_fifo_lock;
	struct kfifo *cqid_fifo;
	spinlock_t cqid_fifo_lock;
	struct kfifo *pdid_fifo;
	spinlock_t pdid_fifo_lock;
	};

	struct cxio_qpid_list {
	struct list_head entry;
	u32 qpid;
	};

	struct cxio_ucontext {
	struct list_head qpids;
	struct mutex lock;
	};

	struct cxio_rdev {
	char dev_name[T3_MAX_DEV_NAME_LEN];
	struct t3cdev *t3cdev_p;
	struct rdma_info rnic_info;
	struct adap_ports port_info;
	struct cxio_hal_resource *rscp;
	struct cxio_hal_ctrl_qp ctrl_qp;
	void *ulp;
	unsigned long qpshift;
	u32 qpnr;
	u32 qpmask;
	struct cxio_ucontext uctx;
	struct gen_pool *pbl_pool;
	struct gen_pool *rqt_pool;
	struct list_head entry;
	};

	static inline int cxio_num_stags(struct cxio_rdev *rdev_p)
	{
	return min((int)T3_MAX_NUM_STAG, (int)((rdev_p->rnic_info.tpt_top - rdev_p->rnic_info.tpt_base) >> 5));
	}

	typedef void (cxio_hal_ev_callback_func_t) (struct cxio_rdev rdev_p,
	struct sk_buff * skb);

	#define RSPQ_CQID(rsp) (be32_to_cpu(rsp->cq_ptrid) & 0xffff)
	#define RSPQ_CQPTR(rsp) ((be32_to_cpu(rsp->cq_ptrid) >> 16) & 0xffff)
	#define RSPQ_GENBIT(rsp) ((be32_to_cpu(rsp->flags) >> 16) & 1)
	#define RSPQ_OVERFLOW(rsp) ((be32_to_cpu(rsp->flags) >> 17) & 1)
	#define RSPQ_AN(rsp) ((be32_to_cpu(rsp->flags) >> 18) & 1)
	#define RSPQ_SE(rsp) ((be32_to_cpu(rsp->flags) >> 19) & 1)
	#define RSPQ_NOTIFY(rsp) ((be32_to_cpu(rsp->flags) >> 20) & 1)
	#define RSPQ_CQBRANCH(rsp) ((be32_to_cpu(rsp->flags) >> 21) & 1)
	#define RSPQ_CREDIT_THRESH(rsp) ((be32_to_cpu(rsp->flags) >> 22) & 1)

	struct respQ_msg_t {
	__be32 flags; /* flit 0 */
	__be32 cq_ptrid;
	__be64 rsvd; /* flit 1 */
	struct t3_cqe cqe; /* flits 2-3 */
	};

	enum t3_cq_opcode {
	CQ_ARM_AN = 0x2,
	CQ_ARM_SE = 0x6,
	CQ_FORCE_AN = 0x3,
	CQ_CREDIT_UPDATE = 0x7
	};

	int cxio_rdev_open(struct cxio_rdev *rdev);
	void cxio_rdev_close(struct cxio_rdev *rdev);
	int cxio_hal_cq_op(struct cxio_rdev rdev, struct t3_cq cq,
	enum t3_cq_opcode op, u32 credit);
	int cxio_hal_clear_qp_ctx(struct cxio_rdev *rdev, u32 qpid);
	int cxio_create_cq(struct cxio_rdev rdev, struct t3_cq cq);
	int cxio_destroy_cq(struct cxio_rdev rdev, struct t3_cq cq);
	int cxio_resize_cq(struct cxio_rdev rdev, struct t3_cq cq);
	void cxio_release_ucontext(struct cxio_rdev rdev, struct cxio_ucontext uctx);
	void cxio_init_ucontext(struct cxio_rdev rdev, struct cxio_ucontext uctx);
	int cxio_create_qp(struct cxio_rdev rdev, u32 kernel_domain, struct t3_wq wq,
	struct cxio_ucontext *uctx);
	int cxio_destroy_qp(struct cxio_rdev rdev, struct t3_wq wq,
	struct cxio_ucontext *uctx);
	int cxio_peek_cq(struct t3_wq wr, struct t3_cq cq, int opcode);
	int cxio_allocate_stag(struct cxio_rdev rdev, u32 stag, u32 pdid,
	enum tpt_mem_perm perm, u32 * pbl_size, u32 * pbl_addr);
	int cxio_register_phys_mem(struct cxio_rdev rdev, u32 stag, u32 pdid,
	enum tpt_mem_perm perm, u32 zbva, u64 to, u32 len,
	u8 page_size, __be64 pbl, u32 pbl_size,
	u32 *pbl_addr);
	int cxio_reregister_phys_mem(struct cxio_rdev rdev, u32 stag, u32 pdid,
	enum tpt_mem_perm perm, u32 zbva, u64 to, u32 len,
	u8 page_size, __be64 pbl, u32 pbl_size,
	u32 *pbl_addr);
	int cxio_dereg_mem(struct cxio_rdev *rdev, u32 stag, u32 pbl_size,
	u32 pbl_addr);
	int cxio_allocate_window(struct cxio_rdev rdev, u32 stag, u32 pdid);
	int cxio_deallocate_window(struct cxio_rdev *rdev, u32 stag);
	int cxio_rdma_init(struct cxio_rdev rdev, struct t3_rdma_init_attr attr);
	void cxio_register_ev_cb(cxio_hal_ev_callback_func_t ev_cb);
	void cxio_unregister_ev_cb(cxio_hal_ev_callback_func_t ev_cb);
	u32 cxio_hal_get_rhdl(void);
	void cxio_hal_put_rhdl(u32 rhdl);
	u32 cxio_hal_get_pdid(struct cxio_hal_resource *rscp);
	void cxio_hal_put_pdid(struct cxio_hal_resource *rscp, u32 pdid);
	int __init cxio_hal_init(void);
	void __exit cxio_hal_exit(void);
	void cxio_flush_rq(struct t3_wq wq, struct t3_cq cq, int count);
	void cxio_flush_sq(struct t3_wq wq, struct t3_cq cq, int count);
	void cxio_count_rcqes(struct t3_cq cq, struct t3_wq wq, int *count);
	void cxio_count_scqes(struct t3_cq cq, struct t3_wq wq, int *count);
	void cxio_flush_hw_cq(struct t3_cq *cq);
	int cxio_poll_cq(struct t3_wq wq, struct t3_cq cq, struct t3_cqe *cqe,
	u8 cqe_flushed, u64 cookie, u32 *credit);

	#define MOD "iw_cxgb3: "
	#define PDBG(fmt, args...) pr_debug(MOD fmt, ## args)

	#ifdef DEBUG
	void cxio_dump_tpt(struct cxio_rdev *rev, u32 stag);
	void cxio_dump_pbl(struct cxio_rdev *rev, u32 pbl_addr, uint len, u8 shift);
	void cxio_dump_wqe(union t3_wr *wqe);
	void cxio_dump_wce(struct t3_cqe *wce);
	void cxio_dump_rqt(struct cxio_rdev *rdev, u32 hwtid, int nents);
	void cxio_dump_tcb(struct cxio_rdev *rdev, u32 hwtid);
	#endif

	#endif