drivers/scsi/bfa/bfa.h

/*
 * Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
 * All rights reserved
 * www.brocade.com
 *
 * Linux driver for Brocade Fibre Channel Host Bus Adapter.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License (GPL) Version 2 as
 * published by the Free Software Foundation
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */
#ifndef __BFA_H__
#define __BFA_H__

#include "bfad_drv.h"
#include "bfa_cs.h"
#include "bfa_plog.h"
#include "bfa_defs_svc.h"
#include "bfi.h"
#include "bfa_ioc.h"

struct bfa_s;

typedef void (*bfa_isr_func_t) (struct bfa_s *bfa, struct bfi_msg_s *m);
typedef void    (*bfa_cb_cbfn_t) (void *cbarg, bfa_boolean_t complete);

/*
 * Interrupt message handlers
 */
void bfa_isr_unhandled(struct bfa_s *bfa, struct bfi_msg_s *m);

/*
 * Request and response queue related defines
 */
#define BFA_REQQ_NELEMS_MIN	(4)
#define BFA_RSPQ_NELEMS_MIN	(4)

#define bfa_reqq_pi(__bfa, __reqq)	((__bfa)->iocfc.req_cq_pi[__reqq])
#define bfa_reqq_ci(__bfa, __reqq)					\
	(*(u32 *)((__bfa)->iocfc.req_cq_shadow_ci[__reqq].kva))

#define bfa_reqq_full(__bfa, __reqq)				\
	(((bfa_reqq_pi(__bfa, __reqq) + 1) &			\
	  ((__bfa)->iocfc.cfg.drvcfg.num_reqq_elems - 1)) ==	\
	 bfa_reqq_ci(__bfa, __reqq))

#define bfa_reqq_next(__bfa, __reqq)					\
	(bfa_reqq_full(__bfa, __reqq) ? NULL :				\
	 ((void *)((struct bfi_msg_s *)((__bfa)->iocfc.req_cq_ba[__reqq].kva) \
		   + bfa_reqq_pi((__bfa), (__reqq)))))

#define bfa_reqq_produce(__bfa, __reqq)	do {				\
		(__bfa)->iocfc.req_cq_pi[__reqq]++;			\
		(__bfa)->iocfc.req_cq_pi[__reqq] &=			\
			((__bfa)->iocfc.cfg.drvcfg.num_reqq_elems - 1); \
		writel((__bfa)->iocfc.req_cq_pi[__reqq],		\
			(__bfa)->iocfc.bfa_regs.cpe_q_pi[__reqq]);	\
		mmiowb();      \
	} while (0)

#define bfa_rspq_pi(__bfa, __rspq)					\
	(*(u32 *)((__bfa)->iocfc.rsp_cq_shadow_pi[__rspq].kva))

#define bfa_rspq_ci(__bfa, __rspq)	((__bfa)->iocfc.rsp_cq_ci[__rspq])
#define bfa_rspq_elem(__bfa, __rspq, __ci)				\
	(&((struct bfi_msg_s *)((__bfa)->iocfc.rsp_cq_ba[__rspq].kva))[__ci])

#define CQ_INCR(__index, __size) do {			\
	(__index)++;					\
	(__index) &= ((__size) - 1);			\
} while (0)

/*
 * Queue element to wait for room in request queue. FIFO order is
 * maintained when fullfilling requests.
 */
struct bfa_reqq_wait_s {
	struct list_head	qe;
	void		(*qresume) (void *cbarg);
	void		*cbarg;
};

/*
 * Circular queue usage assignments
 */
enum {
	BFA_REQQ_IOC	= 0,	/*  all low-priority IOC msgs	*/
	BFA_REQQ_FCXP	= 0,	/*  all FCXP messages		*/
	BFA_REQQ_LPS	= 0,	/*  all lport service msgs	*/
	BFA_REQQ_PORT	= 0,	/*  all port messages		*/
	BFA_REQQ_FLASH	= 0,	/*  for flash module		*/
	BFA_REQQ_DIAG	= 0,	/*  for diag module		*/
	BFA_REQQ_RPORT	= 0,	/*  all port messages		*/
	BFA_REQQ_SBOOT	= 0,	/*  all san boot messages	*/
	BFA_REQQ_QOS_LO	= 1,	/*  all low priority IO	*/
	BFA_REQQ_QOS_MD	= 2,	/*  all medium priority IO	*/
	BFA_REQQ_QOS_HI	= 3,	/*  all high priority IO	*/
};

static inline void
bfa_reqq_winit(struct bfa_reqq_wait_s *wqe, void (*qresume) (void *cbarg),
	       void *cbarg)
{
	wqe->qresume = qresume;
	wqe->cbarg = cbarg;
}

#define bfa_reqq(__bfa, __reqq)	(&(__bfa)->reqq_waitq[__reqq])

/*
 * static inline void
 * bfa_reqq_wait(struct bfa_s *bfa, int reqq, struct bfa_reqq_wait_s *wqe)
 */
#define bfa_reqq_wait(__bfa, __reqq, __wqe) do {			\
									\
		struct list_head *waitq = bfa_reqq(__bfa, __reqq);      \
									\
		WARN_ON(((__reqq) >= BFI_IOC_MAX_CQS));			\
		WARN_ON(!((__wqe)->qresume && (__wqe)->cbarg));		\
									\
		list_add_tail(&(__wqe)->qe, waitq);      \
	} while (0)

#define bfa_reqq_wcancel(__wqe)	list_del(&(__wqe)->qe)


/*
 * Generic BFA callback element.
 */
struct bfa_cb_qe_s {
	struct list_head         qe;
	bfa_cb_cbfn_t  cbfn;
	bfa_boolean_t   once;
	u32		rsvd;
	void           *cbarg;
};

#define bfa_cb_queue(__bfa, __hcb_qe, __cbfn, __cbarg) do {	\
		(__hcb_qe)->cbfn  = (__cbfn);      \
		(__hcb_qe)->cbarg = (__cbarg);      \
		list_add_tail(&(__hcb_qe)->qe, &(__bfa)->comp_q);      \
	} while (0)

#define bfa_cb_dequeue(__hcb_qe)	list_del(&(__hcb_qe)->qe)

#define bfa_cb_queue_once(__bfa, __hcb_qe, __cbfn, __cbarg) do {	\
		(__hcb_qe)->cbfn  = (__cbfn);      \
		(__hcb_qe)->cbarg = (__cbarg);      \
		if (!(__hcb_qe)->once) {      \
			list_add_tail(&(__hcb_qe)->qe, &(__bfa)->comp_q);      \
			(__hcb_qe)->once = BFA_TRUE;			\
		}							\
	} while (0)

#define bfa_cb_queue_done(__hcb_qe) do {	\
		(__hcb_qe)->once = BFA_FALSE;	\
	} while (0)


/*
 * PCI devices supported by the current BFA
 */
struct bfa_pciid_s {
	u16	device_id;
	u16	vendor_id;
};

extern char     bfa_version[];

/*
 * BFA memory resources
 */
enum bfa_mem_type {
	BFA_MEM_TYPE_KVA = 1,	/*  Kernel Virtual Memory *(non-dma-able) */
	BFA_MEM_TYPE_DMA = 2,	/*  DMA-able memory */
	BFA_MEM_TYPE_MAX = BFA_MEM_TYPE_DMA,
};

struct bfa_mem_elem_s {
	enum bfa_mem_type mem_type;	/* see enum bfa_mem_type */
	u32	mem_len;	/*  Total Length in Bytes	*/
	u8		*kva;		/*  kernel virtual address	*/
	u64	dma;		/*  dma address if DMA memory	*/
	u8		*kva_curp;	/*  kva allocation cursor	*/
	u64	dma_curp;	/*  dma allocation cursor	*/
};

struct bfa_meminfo_s {
	struct bfa_mem_elem_s meminfo[BFA_MEM_TYPE_MAX];
};
#define bfa_meminfo_kva(_m)				\
	((_m)->meminfo[BFA_MEM_TYPE_KVA - 1].kva_curp)
#define bfa_meminfo_dma_virt(_m)			\
	((_m)->meminfo[BFA_MEM_TYPE_DMA - 1].kva_curp)
#define bfa_meminfo_dma_phys(_m)			\
	((_m)->meminfo[BFA_MEM_TYPE_DMA - 1].dma_curp)

struct bfa_iocfc_regs_s {
	void __iomem	*intr_status;
	void __iomem	*intr_mask;
	void __iomem	*cpe_q_pi[BFI_IOC_MAX_CQS];
	void __iomem	*cpe_q_ci[BFI_IOC_MAX_CQS];
	void __iomem	*cpe_q_depth[BFI_IOC_MAX_CQS];
	void __iomem	*cpe_q_ctrl[BFI_IOC_MAX_CQS];
	void __iomem	*rme_q_ci[BFI_IOC_MAX_CQS];
	void __iomem	*rme_q_pi[BFI_IOC_MAX_CQS];
	void __iomem	*rme_q_depth[BFI_IOC_MAX_CQS];
	void __iomem	*rme_q_ctrl[BFI_IOC_MAX_CQS];
};

/*
 * MSIX vector handlers
 */
#define BFA_MSIX_MAX_VECTORS	22
typedef void (*bfa_msix_handler_t)(struct bfa_s *bfa, int vec);
struct bfa_msix_s {
	int	nvecs;
	bfa_msix_handler_t handler[BFA_MSIX_MAX_VECTORS];
};

/*
 * Chip specific interfaces
 */
struct bfa_hwif_s {
	void (*hw_reginit)(struct bfa_s *bfa);
	void (*hw_reqq_ack)(struct bfa_s *bfa, int reqq);
	void (*hw_rspq_ack)(struct bfa_s *bfa, int rspq);
	void (*hw_msix_init)(struct bfa_s *bfa, int nvecs);
	void (*hw_msix_install)(struct bfa_s *bfa);
	void (*hw_msix_uninstall)(struct bfa_s *bfa);
	void (*hw_isr_mode_set)(struct bfa_s *bfa, bfa_boolean_t msix);
	void (*hw_msix_getvecs)(struct bfa_s *bfa, u32 *vecmap,
				u32 *nvecs, u32 *maxvec);
	void (*hw_msix_get_rme_range) (struct bfa_s *bfa, u32 *start,
				       u32 *end);
};
typedef void (*bfa_cb_iocfc_t) (void *cbarg, enum bfa_status status);

struct bfa_iocfc_s {
	struct bfa_s		*bfa;
	struct bfa_iocfc_cfg_s	cfg;
	int			action;
	u32		req_cq_pi[BFI_IOC_MAX_CQS];
	u32		rsp_cq_ci[BFI_IOC_MAX_CQS];
	struct bfa_cb_qe_s	init_hcb_qe;
	struct bfa_cb_qe_s	stop_hcb_qe;
	struct bfa_cb_qe_s	dis_hcb_qe;
	struct bfa_cb_qe_s	stats_hcb_qe;
	bfa_boolean_t		cfgdone;

	struct bfa_dma_s	cfg_info;
	struct bfi_iocfc_cfg_s *cfginfo;
	struct bfa_dma_s	cfgrsp_dma;
	struct bfi_iocfc_cfgrsp_s *cfgrsp;
	struct bfi_iocfc_cfg_reply_s *cfg_reply;
	struct bfa_dma_s	req_cq_ba[BFI_IOC_MAX_CQS];
	struct bfa_dma_s	req_cq_shadow_ci[BFI_IOC_MAX_CQS];
	struct bfa_dma_s	rsp_cq_ba[BFI_IOC_MAX_CQS];
	struct bfa_dma_s	rsp_cq_shadow_pi[BFI_IOC_MAX_CQS];
	struct bfa_iocfc_regs_s	bfa_regs;	/*  BFA device registers */
	struct bfa_hwif_s	hwif;
	bfa_cb_iocfc_t		updateq_cbfn; /*  bios callback function */
	void			*updateq_cbarg;	/*  bios callback arg */
	u32	intr_mask;
};

#define bfa_lpuid(__bfa)						\
	bfa_ioc_portid(&(__bfa)->ioc)
#define bfa_msix_init(__bfa, __nvecs)					\
	((__bfa)->iocfc.hwif.hw_msix_init(__bfa, __nvecs))
#define bfa_msix_install(__bfa)						\
	((__bfa)->iocfc.hwif.hw_msix_install(__bfa))
#define bfa_msix_uninstall(__bfa)					\
	((__bfa)->iocfc.hwif.hw_msix_uninstall(__bfa))
#define bfa_isr_mode_set(__bfa, __msix)					\
	((__bfa)->iocfc.hwif.hw_isr_mode_set(__bfa, __msix))
#define bfa_msix_getvecs(__bfa, __vecmap, __nvecs, __maxvec)		\
	((__bfa)->iocfc.hwif.hw_msix_getvecs(__bfa, __vecmap,		\
					__nvecs, __maxvec))
#define bfa_msix_get_rme_range(__bfa, __start, __end)			\
	((__bfa)->iocfc.hwif.hw_msix_get_rme_range(__bfa, __start, __end))
#define bfa_msix(__bfa, __vec)						\
	((__bfa)->msix.handler[__vec](__bfa, __vec))

/*
 * FC specific IOC functions.
 */
void bfa_iocfc_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len,
		       u32 *dm_len);
void bfa_iocfc_attach(struct bfa_s *bfa, void *bfad,
		      struct bfa_iocfc_cfg_s *cfg,
		      struct bfa_meminfo_s *meminfo,
		      struct bfa_pcidev_s *pcidev);
void bfa_iocfc_init(struct bfa_s *bfa);
void bfa_iocfc_start(struct bfa_s *bfa);
void bfa_iocfc_stop(struct bfa_s *bfa);
void bfa_iocfc_isr(void *bfa, struct bfi_mbmsg_s *msg);
void bfa_iocfc_set_snsbase(struct bfa_s *bfa, u64 snsbase_pa);
bfa_boolean_t bfa_iocfc_is_operational(struct bfa_s *bfa);
void bfa_iocfc_reset_queues(struct bfa_s *bfa);

void bfa_msix_all(struct bfa_s *bfa, int vec);
void bfa_msix_reqq(struct bfa_s *bfa, int vec);
void bfa_msix_rspq(struct bfa_s *bfa, int vec);
void bfa_msix_lpu_err(struct bfa_s *bfa, int vec);

void bfa_hwcb_reginit(struct bfa_s *bfa);
void bfa_hwcb_reqq_ack(struct bfa_s *bfa, int rspq);
void bfa_hwcb_rspq_ack(struct bfa_s *bfa, int rspq);
void bfa_hwcb_msix_init(struct bfa_s *bfa, int nvecs);
void bfa_hwcb_msix_install(struct bfa_s *bfa);
void bfa_hwcb_msix_uninstall(struct bfa_s *bfa);
void bfa_hwcb_isr_mode_set(struct bfa_s *bfa, bfa_boolean_t msix);
void bfa_hwcb_msix_getvecs(struct bfa_s *bfa, u32 *vecmap, u32 *nvecs,
			   u32 *maxvec);
void bfa_hwcb_msix_get_rme_range(struct bfa_s *bfa, u32 *start,
				 u32 *end);
void bfa_hwct_reginit(struct bfa_s *bfa);
void bfa_hwct_reqq_ack(struct bfa_s *bfa, int rspq);
void bfa_hwct_rspq_ack(struct bfa_s *bfa, int rspq);
void bfa_hwct_msix_init(struct bfa_s *bfa, int nvecs);
void bfa_hwct_msix_install(struct bfa_s *bfa);
void bfa_hwct_msix_uninstall(struct bfa_s *bfa);
void bfa_hwct_isr_mode_set(struct bfa_s *bfa, bfa_boolean_t msix);
void bfa_hwct_msix_getvecs(struct bfa_s *bfa, u32 *vecmap, u32 *nvecs,
			   u32 *maxvec);
void bfa_hwct_msix_get_rme_range(struct bfa_s *bfa, u32 *start,
				 u32 *end);
void bfa_iocfc_get_bootwwns(struct bfa_s *bfa, u8 *nwwns, wwn_t *wwns);
wwn_t bfa_iocfc_get_pwwn(struct bfa_s *bfa);
wwn_t bfa_iocfc_get_nwwn(struct bfa_s *bfa);
int bfa_iocfc_get_pbc_vports(struct bfa_s *bfa,
				struct bfi_pbc_vport_s *pbc_vport);


/*
 *----------------------------------------------------------------------
 *		BFA public interfaces
 *----------------------------------------------------------------------
 */
#define bfa_stats(_mod, _stats)	((_mod)->stats._stats++)
#define bfa_ioc_get_stats(__bfa, __ioc_stats)		\
	bfa_ioc_fetch_stats(&(__bfa)->ioc, __ioc_stats)
#define bfa_ioc_clear_stats(__bfa)		\
	bfa_ioc_clr_stats(&(__bfa)->ioc)
#define bfa_get_nports(__bfa)			\
	bfa_ioc_get_nports(&(__bfa)->ioc)
#define bfa_get_adapter_manufacturer(__bfa, __manufacturer)		\
	bfa_ioc_get_adapter_manufacturer(&(__bfa)->ioc, __manufacturer)
#define bfa_get_adapter_model(__bfa, __model)			\
	bfa_ioc_get_adapter_model(&(__bfa)->ioc, __model)
#define bfa_get_adapter_serial_num(__bfa, __serial_num)			\
	bfa_ioc_get_adapter_serial_num(&(__bfa)->ioc, __serial_num)
#define bfa_get_adapter_fw_ver(__bfa, __fw_ver)			\
	bfa_ioc_get_adapter_fw_ver(&(__bfa)->ioc, __fw_ver)
#define bfa_get_adapter_optrom_ver(__bfa, __optrom_ver)			\
	bfa_ioc_get_adapter_optrom_ver(&(__bfa)->ioc, __optrom_ver)
#define bfa_get_pci_chip_rev(__bfa, __chip_rev)			\
	bfa_ioc_get_pci_chip_rev(&(__bfa)->ioc, __chip_rev)
#define bfa_get_ioc_state(__bfa)		\
	bfa_ioc_get_state(&(__bfa)->ioc)
#define bfa_get_type(__bfa)			\
	bfa_ioc_get_type(&(__bfa)->ioc)
#define bfa_get_mac(__bfa)			\
	bfa_ioc_get_mac(&(__bfa)->ioc)
#define bfa_get_mfg_mac(__bfa)			\
	bfa_ioc_get_mfg_mac(&(__bfa)->ioc)
#define bfa_get_fw_clock_res(__bfa)		\
	((__bfa)->iocfc.cfgrsp->fwcfg.fw_tick_res)

void bfa_get_pciids(struct bfa_pciid_s **pciids, int *npciids);
void bfa_cfg_get_default(struct bfa_iocfc_cfg_s *cfg);
void bfa_cfg_get_min(struct bfa_iocfc_cfg_s *cfg);
void bfa_cfg_get_meminfo(struct bfa_iocfc_cfg_s *cfg,
			 struct bfa_meminfo_s *meminfo);
void bfa_attach(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg,
		struct bfa_meminfo_s *meminfo,
		struct bfa_pcidev_s *pcidev);
void bfa_detach(struct bfa_s *bfa);
void bfa_cb_init(void *bfad, bfa_status_t status);
void bfa_cb_updateq(void *bfad, bfa_status_t status);

bfa_boolean_t bfa_intx(struct bfa_s *bfa);
void bfa_isr_enable(struct bfa_s *bfa);
void bfa_isr_disable(struct bfa_s *bfa);

void bfa_comp_deq(struct bfa_s *bfa, struct list_head *comp_q);
void bfa_comp_process(struct bfa_s *bfa, struct list_head *comp_q);
void bfa_comp_free(struct bfa_s *bfa, struct list_head *comp_q);

typedef void (*bfa_cb_ioc_t) (void *cbarg, enum bfa_status status);
void bfa_iocfc_get_attr(struct bfa_s *bfa, struct bfa_iocfc_attr_s *attr);


bfa_status_t bfa_iocfc_israttr_set(struct bfa_s *bfa,
				   struct bfa_iocfc_intr_attr_s *attr);

void bfa_iocfc_enable(struct bfa_s *bfa);
void bfa_iocfc_disable(struct bfa_s *bfa);
#define bfa_timer_start(_bfa, _timer, _timercb, _arg, _timeout)		\
	bfa_timer_begin(&(_bfa)->timer_mod, _timer, _timercb, _arg, _timeout)

#endif /* __BFA_H__ */