Commit 42a8e6e2 authored by Krishna Gudipati's avatar Krishna Gudipati Committed by James Bottomley
Browse files

[SCSI] bfa: Add support for IO profiling. 



- Made changes to support IO profiling.
- Added support to configure and query IO profiling info.

Signed-off-by: default avatarKrishna Gudipati <kgudipat@brocade.com>
Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
parent f2ee7601

drivers/scsi/bfa/bfa_fcpim.c

+73 −0
Original line number Diff line number Diff line
@@ -437,6 +437,59 @@ bfa_fcpim_port_iostats(struct bfa_s *bfa, 
	return BFA_STATUS_OK;

}



void

bfa_ioim_profile_comp(struct bfa_ioim_s *ioim)

{

	struct bfa_itnim_latency_s *io_lat =

			&(ioim->itnim->ioprofile.io_latency);

	u32 val, idx;



	val = (u32)(jiffies - ioim->start_time);

	idx = bfa_ioim_get_index(scsi_bufflen((struct scsi_cmnd *)ioim->dio));

	bfa_itnim_ioprofile_update(ioim->itnim, idx);



	io_lat->count[idx]++;

	io_lat->min[idx] = (io_lat->min[idx] < val) ? io_lat->min[idx] : val;

	io_lat->max[idx] = (io_lat->max[idx] > val) ? io_lat->max[idx] : val;

	io_lat->avg[idx] += val;

}



void

bfa_ioim_profile_start(struct bfa_ioim_s *ioim)

{

	ioim->start_time = jiffies;

}



bfa_status_t

bfa_fcpim_profile_on(struct bfa_s *bfa, u32 time)

{

	struct bfa_itnim_s *itnim;

	struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);

	struct list_head *qe, *qen;



	/* accumulate IO stats from itnim */

	list_for_each_safe(qe, qen, &fcpim->itnim_q) {

		itnim = (struct bfa_itnim_s *) qe;

		bfa_itnim_clear_stats(itnim);

	}

	fcpim->io_profile = BFA_TRUE;

	fcpim->io_profile_start_time = time;

	fcpim->profile_comp = bfa_ioim_profile_comp;

	fcpim->profile_start = bfa_ioim_profile_start;

	return BFA_STATUS_OK;

}



bfa_status_t

bfa_fcpim_profile_off(struct bfa_s *bfa)

{

	struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);

	fcpim->io_profile = BFA_FALSE;

	fcpim->io_profile_start_time = 0;

	fcpim->profile_comp = NULL;

	fcpim->profile_start = NULL;

	return BFA_STATUS_OK;

}



u16

bfa_fcpim_qdepth_get(struct bfa_s *bfa)

{
@@ -1401,6 +1454,26 @@ bfa_itnim_hold_io(struct bfa_itnim_s *itnim) 
		 bfa_sm_cmp_state(itnim, bfa_itnim_sm_iocdisable));

}



#define bfa_io_lat_clock_res_div	HZ

#define bfa_io_lat_clock_res_mul	1000

bfa_status_t

bfa_itnim_get_ioprofile(struct bfa_itnim_s *itnim,

			struct bfa_itnim_ioprofile_s *ioprofile)

{

	struct bfa_fcpim_s *fcpim = BFA_FCPIM(itnim->bfa);

	if (!fcpim->io_profile)

		return BFA_STATUS_IOPROFILE_OFF;



	itnim->ioprofile.index = BFA_IOBUCKET_MAX;

	itnim->ioprofile.io_profile_start_time =

				bfa_io_profile_start_time(itnim->bfa);

	itnim->ioprofile.clock_res_mul = bfa_io_lat_clock_res_mul;

	itnim->ioprofile.clock_res_div = bfa_io_lat_clock_res_div;

	*ioprofile = itnim->ioprofile;



	return BFA_STATUS_OK;

}



void

bfa_itnim_clear_stats(struct bfa_itnim_s *itnim)

{

drivers/scsi/bfa/bfa_fcpim.h

+18 −8
Original line number Diff line number Diff line
@@ -79,14 +79,22 @@ bfa_ioim_get_index(u32 n) { 
	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 >= (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;
@@ -297,6 +305,8 @@ 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)

drivers/scsi/bfa/bfad_bsg.c

+53 −0
Original line number Diff line number Diff line
@@ -1977,6 +1977,52 @@ bfad_iocmd_porglog_ctl(struct bfad_s *bfad, void *cmd) 
	return 0;

}



int

bfad_iocmd_fcpim_cfg_profile(struct bfad_s *bfad, void *cmd, unsigned int v_cmd)

{

	struct bfa_bsg_fcpim_profile_s *iocmd =

				(struct bfa_bsg_fcpim_profile_s *)cmd;

	struct timeval  tv;

	unsigned long	flags;



	do_gettimeofday(&tv);

	spin_lock_irqsave(&bfad->bfad_lock, flags);

	if (v_cmd == IOCMD_FCPIM_PROFILE_ON)

		iocmd->status = bfa_fcpim_profile_on(&bfad->bfa, tv.tv_sec);

	else if (v_cmd == IOCMD_FCPIM_PROFILE_OFF)

		iocmd->status = bfa_fcpim_profile_off(&bfad->bfa);

	spin_unlock_irqrestore(&bfad->bfad_lock, flags);



	return 0;

}



static int

bfad_iocmd_itnim_get_ioprofile(struct bfad_s *bfad, void *cmd)

{

	struct bfa_bsg_itnim_ioprofile_s *iocmd =

				(struct bfa_bsg_itnim_ioprofile_s *)cmd;

	struct bfa_fcs_lport_s *fcs_port;

	struct bfa_fcs_itnim_s *itnim;

	unsigned long   flags;



	spin_lock_irqsave(&bfad->bfad_lock, flags);

	fcs_port = bfa_fcs_lookup_port(&bfad->bfa_fcs,

				iocmd->vf_id, iocmd->lpwwn);

	if (!fcs_port)

		iocmd->status = BFA_STATUS_UNKNOWN_LWWN;

	else {

		itnim = bfa_fcs_itnim_lookup(fcs_port, iocmd->rpwwn);

		if (itnim == NULL)

			iocmd->status = BFA_STATUS_UNKNOWN_RWWN;

		else

			iocmd->status = bfa_itnim_get_ioprofile(

						bfa_fcs_itnim_get_halitn(itnim),

						&iocmd->ioprofile);

	}

	spin_unlock_irqrestore(&bfad->bfad_lock, flags);

	return 0;

}



static int

bfad_iocmd_handler(struct bfad_s *bfad, unsigned int cmd, void *iocmd,

		unsigned int payload_len)
@@ -2238,6 +2284,13 @@ bfad_iocmd_handler(struct bfad_s *bfad, unsigned int cmd, void *iocmd, 
	case IOCMD_DEBUG_PORTLOG_CTL:

		rc = bfad_iocmd_porglog_ctl(bfad, iocmd);

		break;

	case IOCMD_FCPIM_PROFILE_ON:

	case IOCMD_FCPIM_PROFILE_OFF:

		rc = bfad_iocmd_fcpim_cfg_profile(bfad, iocmd, cmd);

		break;

	case IOCMD_ITNIM_GET_IOPROFILE:

		rc = bfad_iocmd_itnim_get_ioprofile(bfad, iocmd);

		break;

	default:

		rc = -EINVAL;

		break;

drivers/scsi/bfa/bfad_bsg.h

+18 −0
Original line number Diff line number Diff line
@@ -116,6 +116,9 @@ enum { 
	IOCMD_DEBUG_START_DTRC,

	IOCMD_DEBUG_STOP_DTRC,

	IOCMD_DEBUG_PORTLOG_CTL,

	IOCMD_FCPIM_PROFILE_ON,

	IOCMD_FCPIM_PROFILE_OFF,

	IOCMD_ITNIM_GET_IOPROFILE,

};



struct bfa_bsg_gen_s {
@@ -132,6 +135,21 @@ struct bfa_bsg_portlogctl_s { 
	int		inst_no;

};



struct bfa_bsg_fcpim_profile_s {

	bfa_status_t    status;

	u16		bfad_num;

	u16		rsvd;

};



struct bfa_bsg_itnim_ioprofile_s {

	bfa_status_t	status;

	u16		bfad_num;

	u16		vf_id;

	wwn_t		lpwwn;

	wwn_t		rpwwn;

	struct bfa_itnim_ioprofile_s ioprofile;

};



struct bfa_bsg_ioc_name_s {

	bfa_status_t	status;

	u16		bfad_num;