Initial import

1 files changed, 429 insertions, 0 deletions

diff --git a/drivers/scsi/bfa/bfa_fcpim.h b/drivers/scsi/bfa/bfa_fcpim.h
new file mode 100644
index 000000000..e693af6e5
--- /dev/null
+++ b/drivers/scsi/bfa/bfa_fcpim.h
@@ -0,0 +1,429 @@
+/*
+ * 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_FCPIM_H__
+#define __BFA_FCPIM_H__
+
+#include "bfa.h"
+#include "bfa_svc.h"
+#include "bfi_ms.h"
+#include "bfa_defs_svc.h"
+#include "bfa_cs.h"
+
+/* FCP module related definitions */
+#define BFA_IO_MAX	BFI_IO_MAX
+#define BFA_FWTIO_MAX	2000
+
+struct bfa_fcp_mod_s;
+struct bfa_iotag_s {
+	struct list_head	qe;	/* queue element	*/
+	u16	tag;			/* FW IO tag		*/
+};
+
+struct bfa_itn_s {
+	bfa_isr_func_t isr;
+};
+
+void bfa_itn_create(struct bfa_s *bfa, struct bfa_rport_s *rport,
+		void (*isr)(struct bfa_s *bfa, struct bfi_msg_s *m));
+void bfa_itn_isr(struct bfa_s *bfa, struct bfi_msg_s *m);
+void bfa_iotag_attach(struct bfa_fcp_mod_s *fcp);
+void bfa_fcp_res_recfg(struct bfa_s *bfa, u16 num_ioim_fw, u16 max_ioim_fw);
+
+#define BFA_FCP_MOD(_hal)	(&(_hal)->modules.fcp_mod)
+#define BFA_MEM_FCP_KVA(__bfa)	(&(BFA_FCP_MOD(__bfa)->kva_seg))
+#define BFA_IOTAG_FROM_TAG(_fcp, _tag)	\
+	(&(_fcp)->iotag_arr[(_tag & BFA_IOIM_IOTAG_MASK)])
+#define BFA_ITN_FROM_TAG(_fcp, _tag)	\
+	((_fcp)->itn_arr + ((_tag) & ((_fcp)->num_itns - 1)))
+#define BFA_SNSINFO_FROM_TAG(_fcp, _tag) \
+	bfa_mem_get_dmabuf_kva(_fcp, (_tag & BFA_IOIM_IOTAG_MASK),	\
+	BFI_IOIM_SNSLEN)
+
+
+#define BFA_ITNIM_MIN   32
+#define BFA_ITNIM_MAX   1024
+
+#define BFA_IOIM_MIN	8
+#define BFA_IOIM_MAX	2000
+
+#define BFA_TSKIM_MIN   4
+#define BFA_TSKIM_MAX   512
+#define BFA_FCPIM_PATHTOV_DEF	(30 * 1000)	/* in millisecs */
+#define BFA_FCPIM_PATHTOV_MAX	(90 * 1000)	/* in millisecs */
+
+
+#define bfa_itnim_ioprofile_update(__itnim, __index)			\
+	(__itnim->ioprofile.iocomps[__index]++)
+
+#define BFA_IOIM_RETRY_TAG_OFFSET 11
+#define BFA_IOIM_IOTAG_MASK 0x07ff /* 2K IOs */
+#define BFA_IOIM_RETRY_MAX 7
+
+/* Buckets are are 512 bytes to 2MB */
+static inline u32
+bfa_ioim_get_index(u32 n) {
+	int pos = 0;
+	if (n >= (1UL)<<22)
+		return BFA_IOBUCKET_MAX - 1;
+	n >>= 8;
+	if (n >= (1UL)<<16) {
+		n >>= 16;
+		pos += 16;
+	}
+	if (n >= 1 << 8) {
+		n >>= 8;
+		pos += 8;
+	}
+	if (n >= 1 << 4) {
+		n >>= 4;
+		pos += 4;
+	}
+	if (n >= 1 << 2) {
+		n >>= 2;
+		pos += 2;
+	}
+	if (n >= 1 << 1)
+		pos += 1;
+
+	return (n == 0) ? (0) : pos;
+}
+
+/*
+ * forward declarations
+ */
+struct bfa_ioim_s;
+struct bfa_tskim_s;
+struct bfad_ioim_s;
+struct bfad_tskim_s;
+
+typedef void    (*bfa_fcpim_profile_t) (struct bfa_ioim_s *ioim);
+
+struct bfa_fcpim_s {
+	struct bfa_s		*bfa;
+	struct bfa_fcp_mod_s	*fcp;
+	struct bfa_itnim_s	*itnim_arr;
+	struct bfa_ioim_s	*ioim_arr;
+	struct bfa_ioim_sp_s	*ioim_sp_arr;
+	struct bfa_tskim_s	*tskim_arr;
+	int			num_itnims;
+	int			num_tskim_reqs;
+	u32			path_tov;
+	u16			q_depth;
+	u8			reqq;		/*  Request queue to be used */
+	struct list_head	itnim_q;	/*  queue of active itnim */
+	struct list_head	ioim_resfree_q; /*  IOs waiting for f/w */
+	struct list_head	ioim_comp_q;	/*  IO global comp Q	*/
+	struct list_head	tskim_free_q;
+	struct list_head	tskim_unused_q;	/* Unused tskim Q */
+	u32			ios_active;	/*  current active IOs	*/
+	u32			delay_comp;
+	struct bfa_fcpim_del_itn_stats_s del_itn_stats;
+	bfa_boolean_t		ioredirect;
+	bfa_boolean_t		io_profile;
+	u32			io_profile_start_time;
+	bfa_fcpim_profile_t     profile_comp;
+	bfa_fcpim_profile_t     profile_start;
+};
+
+/* Max FCP dma segs required */
+#define BFA_FCP_DMA_SEGS	BFI_IOIM_SNSBUF_SEGS
+
+struct bfa_fcp_mod_s {
+	struct bfa_s		*bfa;
+	struct list_head	iotag_ioim_free_q;	/* free IO resources */
+	struct list_head	iotag_tio_free_q;	/* free IO resources */
+	struct list_head	iotag_unused_q;	/* unused IO resources*/
+	struct bfa_iotag_s	*iotag_arr;
+	struct bfa_itn_s	*itn_arr;
+	int			max_ioim_reqs;
+	int			num_ioim_reqs;
+	int			num_fwtio_reqs;
+	int			num_itns;
+	struct bfa_dma_s	snsbase[BFA_FCP_DMA_SEGS];
+	struct bfa_fcpim_s	fcpim;
+	struct bfa_mem_dma_s	dma_seg[BFA_FCP_DMA_SEGS];
+	struct bfa_mem_kva_s	kva_seg;
+	int			throttle_update_required;
+};
+
+/*
+ * BFA IO (initiator mode)
+ */
+struct bfa_ioim_s {
+	struct list_head	qe;		/*  queue elememt	*/
+	bfa_sm_t		sm;		/*  BFA ioim state machine */
+	struct bfa_s		*bfa;		/*  BFA module	*/
+	struct bfa_fcpim_s	*fcpim;		/*  parent fcpim module */
+	struct bfa_itnim_s	*itnim;		/*  i-t-n nexus for this IO  */
+	struct bfad_ioim_s	*dio;		/*  driver IO handle	*/
+	u16			iotag;		/*  FWI IO tag	*/
+	u16			abort_tag;	/*  unqiue abort request tag */
+	u16			nsges;		/*  number of SG elements */
+	u16			nsgpgs;		/*  number of SG pages	*/
+	struct bfa_sgpg_s	*sgpg;		/*  first SG page	*/
+	struct list_head	sgpg_q;		/*  allocated SG pages	*/
+	struct bfa_cb_qe_s	hcb_qe;		/*  bfa callback qelem	*/
+	bfa_cb_cbfn_t		io_cbfn;	/*  IO completion handler */
+	struct bfa_ioim_sp_s	*iosp;		/*  slow-path IO handling */
+	u8			reqq;		/*  Request queue for I/O */
+	u8			mode;		/*  IO is passthrough or not */
+	u64			start_time;	/*  IO's Profile start val */
+};
+
+struct bfa_ioim_sp_s {
+	struct bfi_msg_s	comp_rspmsg;	/*  IO comp f/w response */
+	struct bfa_sgpg_wqe_s	sgpg_wqe;	/*  waitq elem for sgpg	*/
+	struct bfa_reqq_wait_s	reqq_wait;	/*  to wait for room in reqq */
+	bfa_boolean_t		abort_explicit;	/*  aborted by OS	*/
+	struct bfa_tskim_s	*tskim;		/*  Relevant TM cmd	*/
+};
+
+/*
+ * BFA Task management command (initiator mode)
+ */
+struct bfa_tskim_s {
+	struct list_head	qe;
+	bfa_sm_t		sm;
+	struct bfa_s		*bfa;	/*  BFA module  */
+	struct bfa_fcpim_s	*fcpim;	/*  parent fcpim module	*/
+	struct bfa_itnim_s	*itnim;	/*  i-t-n nexus for this IO  */
+	struct bfad_tskim_s	*dtsk;  /*  driver task mgmt cmnd	*/
+	bfa_boolean_t		notify;	/*  notify itnim on TM comp  */
+	struct scsi_lun		lun;	/*  lun if applicable	*/
+	enum fcp_tm_cmnd	tm_cmnd; /*  task management command  */
+	u16			tsk_tag; /*  FWI IO tag	*/
+	u8			tsecs;	/*  timeout in seconds	*/
+	struct bfa_reqq_wait_s  reqq_wait;   /*  to wait for room in reqq */
+	struct list_head	io_q;	/*  queue of affected IOs	*/
+	struct bfa_wc_s		wc;	/*  waiting counter	*/
+	struct bfa_cb_qe_s	hcb_qe;	/*  bfa callback qelem	*/
+	enum bfi_tskim_status   tsk_status;  /*  TM status	*/
+};
+
+/*
+ * BFA i-t-n (initiator mode)
+ */
+struct bfa_itnim_s {
+	struct list_head	qe;	/*  queue element	*/
+	bfa_sm_t		sm;	/*  i-t-n im BFA state machine  */
+	struct bfa_s		*bfa;	/*  bfa instance	*/
+	struct bfa_rport_s	*rport;	/*  bfa rport	*/
+	void			*ditn;	/*  driver i-t-n structure	*/
+	struct bfi_mhdr_s	mhdr;	/*  pre-built mhdr	*/
+	u8			msg_no;	/*  itnim/rport firmware handle */
+	u8			reqq;	/*  CQ for requests	*/
+	struct bfa_cb_qe_s	hcb_qe;	/*  bfa callback qelem	*/
+	struct list_head pending_q;	/*  queue of pending IO requests */
+	struct list_head io_q;		/*  queue of active IO requests */
+	struct list_head io_cleanup_q;	/*  IO being cleaned up	*/
+	struct list_head tsk_q;		/*  queue of active TM commands */
+	struct list_head  delay_comp_q; /*  queue of failed inflight cmds */
+	bfa_boolean_t   seq_rec;	/*  SQER supported	*/
+	bfa_boolean_t   is_online;	/*  itnim is ONLINE for IO	*/
+	bfa_boolean_t   iotov_active;	/*  IO TOV timer is active	 */
+	struct bfa_wc_s	wc;		/*  waiting counter	*/
+	struct bfa_timer_s timer;	/*  pending IO TOV	 */
+	struct bfa_reqq_wait_s reqq_wait; /*  to wait for room in reqq */
+	struct bfa_fcpim_s *fcpim;	/*  fcpim module	*/
+	struct bfa_itnim_iostats_s	stats;
+	struct bfa_itnim_ioprofile_s  ioprofile;
+};
+
+#define bfa_itnim_is_online(_itnim) ((_itnim)->is_online)
+#define BFA_FCPIM(_hal)	(&(_hal)->modules.fcp_mod.fcpim)
+#define BFA_IOIM_TAG_2_ID(_iotag)	((_iotag) & BFA_IOIM_IOTAG_MASK)
+#define BFA_IOIM_FROM_TAG(_fcpim, _iotag)	\
+	(&fcpim->ioim_arr[(_iotag & BFA_IOIM_IOTAG_MASK)])
+#define BFA_TSKIM_FROM_TAG(_fcpim, _tmtag)	\
+	(&fcpim->tskim_arr[_tmtag & (fcpim->num_tskim_reqs - 1)])
+
+#define bfa_io_profile_start_time(_bfa)	\
+	((_bfa)->modules.fcp_mod.fcpim.io_profile_start_time)
+#define bfa_fcpim_get_io_profile(_bfa)	\
+	((_bfa)->modules.fcp_mod.fcpim.io_profile)
+#define bfa_ioim_update_iotag(__ioim) do {				\
+	uint16_t k = (__ioim)->iotag >> BFA_IOIM_RETRY_TAG_OFFSET;	\
+	k++; (__ioim)->iotag &= BFA_IOIM_IOTAG_MASK;			\
+	(__ioim)->iotag |= k << BFA_IOIM_RETRY_TAG_OFFSET;		\
+} while (0)
+
+static inline bfa_boolean_t
+bfa_ioim_maxretry_reached(struct bfa_ioim_s *ioim)
+{
+	uint16_t k = ioim->iotag >> BFA_IOIM_RETRY_TAG_OFFSET;
+	if (k < BFA_IOIM_RETRY_MAX)
+		return BFA_FALSE;
+	return BFA_TRUE;
+}
+
+/*
+ * function prototypes
+ */
+void	bfa_ioim_attach(struct bfa_fcpim_s *fcpim);
+void	bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
+void	bfa_ioim_good_comp_isr(struct bfa_s *bfa,
+					struct bfi_msg_s *msg);
+void	bfa_ioim_cleanup(struct bfa_ioim_s *ioim);
+void	bfa_ioim_cleanup_tm(struct bfa_ioim_s *ioim,
+					struct bfa_tskim_s *tskim);
+void	bfa_ioim_iocdisable(struct bfa_ioim_s *ioim);
+void	bfa_ioim_tov(struct bfa_ioim_s *ioim);
+
+void	bfa_tskim_attach(struct bfa_fcpim_s *fcpim);
+void	bfa_tskim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
+void	bfa_tskim_iodone(struct bfa_tskim_s *tskim);
+void	bfa_tskim_iocdisable(struct bfa_tskim_s *tskim);
+void	bfa_tskim_cleanup(struct bfa_tskim_s *tskim);
+void	bfa_tskim_res_recfg(struct bfa_s *bfa, u16 num_tskim_fw);
+
+void	bfa_itnim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len);
+void	bfa_itnim_attach(struct bfa_fcpim_s *fcpim);
+void	bfa_itnim_iocdisable(struct bfa_itnim_s *itnim);
+void	bfa_itnim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
+void	bfa_itnim_iodone(struct bfa_itnim_s *itnim);
+void	bfa_itnim_tskdone(struct bfa_itnim_s *itnim);
+bfa_boolean_t   bfa_itnim_hold_io(struct bfa_itnim_s *itnim);
+
+/*
+ * bfa fcpim module API functions
+ */
+void	bfa_fcpim_path_tov_set(struct bfa_s *bfa, u16 path_tov);
+u16	bfa_fcpim_path_tov_get(struct bfa_s *bfa);
+u16	bfa_fcpim_qdepth_get(struct bfa_s *bfa);
+bfa_status_t bfa_fcpim_port_iostats(struct bfa_s *bfa,
+			struct bfa_itnim_iostats_s *stats, u8 lp_tag);
+void bfa_fcpim_add_stats(struct bfa_itnim_iostats_s *fcpim_stats,
+			struct bfa_itnim_iostats_s *itnim_stats);
+bfa_status_t bfa_fcpim_profile_on(struct bfa_s *bfa, u32 time);
+bfa_status_t bfa_fcpim_profile_off(struct bfa_s *bfa);
+
+#define bfa_fcpim_ioredirect_enabled(__bfa)				\
+	(((struct bfa_fcpim_s *)(BFA_FCPIM(__bfa)))->ioredirect)
+
+#define bfa_fcpim_get_next_reqq(__bfa, __qid)				\
+{									\
+	struct bfa_fcpim_s *__fcpim = BFA_FCPIM(__bfa);      \
+	__fcpim->reqq++;						\
+	__fcpim->reqq &= (BFI_IOC_MAX_CQS - 1);      \
+	*(__qid) = __fcpim->reqq;					\
+}
+
+#define bfa_iocfc_map_msg_to_qid(__msg, __qid)				\
+	*(__qid) = (u8)((__msg) & (BFI_IOC_MAX_CQS - 1));
+/*
+ * bfa itnim API functions
+ */
+struct bfa_itnim_s *bfa_itnim_create(struct bfa_s *bfa,
+		struct bfa_rport_s *rport, void *itnim);
+void bfa_itnim_delete(struct bfa_itnim_s *itnim);
+void bfa_itnim_online(struct bfa_itnim_s *itnim, bfa_boolean_t seq_rec);
+void bfa_itnim_offline(struct bfa_itnim_s *itnim);
+void bfa_itnim_clear_stats(struct bfa_itnim_s *itnim);
+bfa_status_t bfa_itnim_get_ioprofile(struct bfa_itnim_s *itnim,
+			struct bfa_itnim_ioprofile_s *ioprofile);
+
+#define bfa_itnim_get_reqq(__ioim) (((struct bfa_ioim_s *)__ioim)->itnim->reqq)
+
+/*
+ * BFA completion callback for bfa_itnim_online().
+ */
+void	bfa_cb_itnim_online(void *itnim);
+
+/*
+ * BFA completion callback for bfa_itnim_offline().
+ */
+void	bfa_cb_itnim_offline(void *itnim);
+void	bfa_cb_itnim_tov_begin(void *itnim);
+void	bfa_cb_itnim_tov(void *itnim);
+
+/*
+ * BFA notification to FCS/driver for second level error recovery.
+ * Atleast one I/O request has timedout and target is unresponsive to
+ * repeated abort requests. Second level error recovery should be initiated
+ * by starting implicit logout and recovery procedures.
+ */
+void	bfa_cb_itnim_sler(void *itnim);
+
+/*
+ * bfa ioim API functions
+ */
+struct bfa_ioim_s	*bfa_ioim_alloc(struct bfa_s *bfa,
+					struct bfad_ioim_s *dio,
+					struct bfa_itnim_s *itnim,
+					u16 nsgles);
+
+void		bfa_ioim_free(struct bfa_ioim_s *ioim);
+void		bfa_ioim_start(struct bfa_ioim_s *ioim);
+bfa_status_t	bfa_ioim_abort(struct bfa_ioim_s *ioim);
+void		bfa_ioim_delayed_comp(struct bfa_ioim_s *ioim,
+				      bfa_boolean_t iotov);
+/*
+ * I/O completion notification.
+ *
+ * @param[in]		dio			driver IO structure
+ * @param[in]		io_status		IO completion status
+ * @param[in]		scsi_status		SCSI status returned by target
+ * @param[in]		sns_len			SCSI sense length, 0 if none
+ * @param[in]		sns_info		SCSI sense data, if any
+ * @param[in]		residue			Residual length
+ *
+ * @return None
+ */
+void bfa_cb_ioim_done(void *bfad, struct bfad_ioim_s *dio,
+			enum bfi_ioim_status io_status,
+			u8 scsi_status, int sns_len,
+			u8 *sns_info, s32 residue);
+
+/*
+ * I/O good completion notification.
+ */
+void bfa_cb_ioim_good_comp(void *bfad, struct bfad_ioim_s *dio);
+
+/*
+ * I/O abort completion notification
+ */
+void bfa_cb_ioim_abort(void *bfad, struct bfad_ioim_s *dio);
+
+/*
+ * bfa tskim API functions
+ */
+struct bfa_tskim_s *bfa_tskim_alloc(struct bfa_s *bfa,
+			struct bfad_tskim_s *dtsk);
+void bfa_tskim_free(struct bfa_tskim_s *tskim);
+void bfa_tskim_start(struct bfa_tskim_s *tskim,
+			struct bfa_itnim_s *itnim, struct scsi_lun lun,
+			enum fcp_tm_cmnd tm, u8 t_secs);
+void bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
+			enum bfi_tskim_status tsk_status);
+
+void	bfa_fcpim_lunmask_rp_update(struct bfa_s *bfa, wwn_t lp_wwn,
+			wwn_t rp_wwn, u16 rp_tag, u8 lp_tag);
+bfa_status_t	bfa_fcpim_lunmask_update(struct bfa_s *bfa, u32 on_off);
+bfa_status_t	bfa_fcpim_lunmask_query(struct bfa_s *bfa, void *buf);
+bfa_status_t	bfa_fcpim_lunmask_delete(struct bfa_s *bfa, u16 vf_id,
+				wwn_t *pwwn, wwn_t rpwwn, struct scsi_lun lun);
+bfa_status_t	bfa_fcpim_lunmask_add(struct bfa_s *bfa, u16 vf_id,
+				wwn_t *pwwn, wwn_t rpwwn, struct scsi_lun lun);
+bfa_status_t	bfa_fcpim_lunmask_clear(struct bfa_s *bfa);
+u16		bfa_fcpim_read_throttle(struct bfa_s *bfa);
+bfa_status_t	bfa_fcpim_write_throttle(struct bfa_s *bfa, u16 value);
+bfa_status_t	bfa_fcpim_throttle_set(struct bfa_s *bfa, u16 value);
+bfa_status_t	bfa_fcpim_throttle_get(struct bfa_s *bfa, void *buf);
+u16     bfa_fcpim_get_throttle_cfg(struct bfa_s *bfa, u16 drv_cfg_param);
+
+#endif /* __BFA_FCPIM_H__ */