tcm_qla2xxx.c 60.5 KB
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/*******************************************************************************
 * This file contains tcm implementation using v4 configfs fabric infrastructure
 * for QLogic target mode HBAs
 *
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 * (c) Copyright 2010-2013 Datera, Inc.
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 *
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 * Author: Nicholas A. Bellinger <nab@daterainc.com>
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 *
 * tcm_qla2xxx_parse_wwn() and tcm_qla2xxx_format_wwn() contains code from
 * the TCM_FC / Open-FCoE.org fabric module.
 *
 * Copyright (c) 2010 Cisco Systems, Inc
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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.
 ****************************************************************************/


#include <linux/module.h>
#include <linux/moduleparam.h>
#include <generated/utsrelease.h>
#include <linux/utsname.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/kthread.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/configfs.h>
#include <linux/ctype.h>
#include <asm/unaligned.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_cmnd.h>
#include <target/target_core_base.h>
#include <target/target_core_fabric.h>
#include <target/target_core_fabric_configfs.h>
#include <target/target_core_configfs.h>
#include <target/configfs_macros.h>

#include "qla_def.h"
#include "qla_target.h"
#include "tcm_qla2xxx.h"

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static struct workqueue_struct *tcm_qla2xxx_free_wq;
static struct workqueue_struct *tcm_qla2xxx_cmd_wq;

/* Local pointer to allocated TCM configfs fabric module */
static struct target_fabric_configfs *tcm_qla2xxx_fabric_configfs;
static struct target_fabric_configfs *tcm_qla2xxx_npiv_fabric_configfs;
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/*
 * Parse WWN.
 * If strict, we require lower-case hex and colon separators to be sure
 * the name is the same as what would be generated by ft_format_wwn()
 * so the name and wwn are mapped one-to-one.
 */
static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
{
	const char *cp;
	char c;
	u32 nibble;
	u32 byte = 0;
	u32 pos = 0;
	u32 err;

	*wwn = 0;
	for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
		c = *cp;
		if (c == '\n' && cp[1] == '\0')
			continue;
		if (strict && pos++ == 2 && byte++ < 7) {
			pos = 0;
			if (c == ':')
				continue;
			err = 1;
			goto fail;
		}
		if (c == '\0') {
			err = 2;
			if (strict && byte != 8)
				goto fail;
			return cp - name;
		}
		err = 3;
		if (isdigit(c))
			nibble = c - '0';
		else if (isxdigit(c) && (islower(c) || !strict))
			nibble = tolower(c) - 'a' + 10;
		else
			goto fail;
		*wwn = (*wwn << 4) | nibble;
	}
	err = 4;
fail:
	pr_debug("err %u len %zu pos %u byte %u\n",
			err, cp - name, pos, byte);
	return -1;
}

static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
{
	u8 b[8];

	put_unaligned_be64(wwn, b);
	return snprintf(buf, len,
		"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
		b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
}

static char *tcm_qla2xxx_get_fabric_name(void)
{
	return "qla2xxx";
}

/*
 * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
 */
static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
{
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	unsigned int i, j;
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	u8 wwn[8];

	memset(wwn, 0, sizeof(wwn));

	/* Validate and store the new name */
	for (i = 0, j = 0; i < 16; i++) {
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		int value;

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		value = hex_to_bin(*ns++);
		if (value >= 0)
			j = (j << 4) | value;
		else
			return -EINVAL;

		if (i % 2) {
			wwn[i/2] = j & 0xff;
			j = 0;
		}
	}

	*nm = wwn_to_u64(wwn);
	return 0;
}

/*
 * This parsing logic follows drivers/scsi/scsi_transport_fc.c:
 * store_fc_host_vport_create()
 */
static int tcm_qla2xxx_npiv_parse_wwn(
	const char *name,
	size_t count,
	u64 *wwpn,
	u64 *wwnn)
{
	unsigned int cnt = count;
	int rc;

	*wwpn = 0;
	*wwnn = 0;

	/* count may include a LF at end of string */
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	if (name[cnt-1] == '\n' || name[cnt-1] == 0)
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		cnt--;

	/* validate we have enough characters for WWPN */
	if ((cnt != (16+1+16)) || (name[16] != ':'))
		return -EINVAL;

	rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
	if (rc != 0)
		return rc;

	rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
	if (rc != 0)
		return rc;

	return 0;
}

static char *tcm_qla2xxx_npiv_get_fabric_name(void)
{
	return "qla2xxx_npiv";
}

static u8 tcm_qla2xxx_get_fabric_proto_ident(struct se_portal_group *se_tpg)
{
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
				struct tcm_qla2xxx_tpg, se_tpg);
	struct tcm_qla2xxx_lport *lport = tpg->lport;
	u8 proto_id;

	switch (lport->lport_proto_id) {
	case SCSI_PROTOCOL_FCP:
	default:
		proto_id = fc_get_fabric_proto_ident(se_tpg);
		break;
	}

	return proto_id;
}

static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
{
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
				struct tcm_qla2xxx_tpg, se_tpg);
	struct tcm_qla2xxx_lport *lport = tpg->lport;

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	return lport->lport_naa_name;
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}

static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg)
{
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
				struct tcm_qla2xxx_tpg, se_tpg);
	return tpg->lport_tpgt;
}

static u32 tcm_qla2xxx_get_default_depth(struct se_portal_group *se_tpg)
{
	return 1;
}

static u32 tcm_qla2xxx_get_pr_transport_id(
	struct se_portal_group *se_tpg,
	struct se_node_acl *se_nacl,
	struct t10_pr_registration *pr_reg,
	int *format_code,
	unsigned char *buf)
{
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
				struct tcm_qla2xxx_tpg, se_tpg);
	struct tcm_qla2xxx_lport *lport = tpg->lport;
	int ret = 0;

	switch (lport->lport_proto_id) {
	case SCSI_PROTOCOL_FCP:
	default:
		ret = fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg,
					format_code, buf);
		break;
	}

	return ret;
}

static u32 tcm_qla2xxx_get_pr_transport_id_len(
	struct se_portal_group *se_tpg,
	struct se_node_acl *se_nacl,
	struct t10_pr_registration *pr_reg,
	int *format_code)
{
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
				struct tcm_qla2xxx_tpg, se_tpg);
	struct tcm_qla2xxx_lport *lport = tpg->lport;
	int ret = 0;

	switch (lport->lport_proto_id) {
	case SCSI_PROTOCOL_FCP:
	default:
		ret = fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,
					format_code);
		break;
	}

	return ret;
}

static char *tcm_qla2xxx_parse_pr_out_transport_id(
	struct se_portal_group *se_tpg,
	const char *buf,
	u32 *out_tid_len,
	char **port_nexus_ptr)
{
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
				struct tcm_qla2xxx_tpg, se_tpg);
	struct tcm_qla2xxx_lport *lport = tpg->lport;
	char *tid = NULL;

	switch (lport->lport_proto_id) {
	case SCSI_PROTOCOL_FCP:
	default:
		tid = fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,
					port_nexus_ptr);
		break;
	}

	return tid;
}

static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
{
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
				struct tcm_qla2xxx_tpg, se_tpg);

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	return tpg->tpg_attrib.generate_node_acls;
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}

static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
{
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
				struct tcm_qla2xxx_tpg, se_tpg);

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	return tpg->tpg_attrib.cache_dynamic_acls;
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}

static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
{
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
				struct tcm_qla2xxx_tpg, se_tpg);

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	return tpg->tpg_attrib.demo_mode_write_protect;
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}

static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
{
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
				struct tcm_qla2xxx_tpg, se_tpg);

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	return tpg->tpg_attrib.prod_mode_write_protect;
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}

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static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg)
{
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
				struct tcm_qla2xxx_tpg, se_tpg);

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	return tpg->tpg_attrib.demo_mode_login_only;
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}

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static struct se_node_acl *tcm_qla2xxx_alloc_fabric_acl(
	struct se_portal_group *se_tpg)
{
	struct tcm_qla2xxx_nacl *nacl;

	nacl = kzalloc(sizeof(struct tcm_qla2xxx_nacl), GFP_KERNEL);
	if (!nacl) {
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		pr_err("Unable to allocate struct tcm_qla2xxx_nacl\n");
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		return NULL;
	}

	return &nacl->se_node_acl;
}

static void tcm_qla2xxx_release_fabric_acl(
	struct se_portal_group *se_tpg,
	struct se_node_acl *se_nacl)
{
	struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
			struct tcm_qla2xxx_nacl, se_node_acl);
	kfree(nacl);
}

static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
{
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
				struct tcm_qla2xxx_tpg, se_tpg);

	return tpg->lport_tpgt;
}

static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
{
	struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
			struct qla_tgt_mgmt_cmd, free_work);

	transport_generic_free_cmd(&mcmd->se_cmd, 0);
}

/*
 * Called from qla_target_template->free_mcmd(), and will call
 * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
 * release callback.  qla_hw_data->hardware_lock is expected to be held
 */
static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
{
	INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
	queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
}

static void tcm_qla2xxx_complete_free(struct work_struct *work)
{
	struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);

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	cmd->cmd_in_wq = 0;

	WARN_ON(cmd->cmd_flags &  BIT_16);

	cmd->cmd_flags |= BIT_16;
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	transport_generic_free_cmd(&cmd->se_cmd, 0);
}

/*
 * Called from qla_target_template->free_cmd(), and will call
 * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
 * release callback.  qla_hw_data->hardware_lock is expected to be held
 */
static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
{
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	cmd->cmd_in_wq = 1;
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	INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
	queue_work(tcm_qla2xxx_free_wq, &cmd->work);
}

/*
 * Called from struct target_core_fabric_ops->check_stop_free() context
 */
static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
{
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	struct qla_tgt_cmd *cmd;

	if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
		cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
		cmd->cmd_flags |= BIT_14;
	}

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	return target_put_sess_cmd(se_cmd->se_sess, se_cmd);
}

/* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
 * fabric descriptor @se_cmd command to release
 */
static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
{
	struct qla_tgt_cmd *cmd;

	if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
		struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
				struct qla_tgt_mgmt_cmd, se_cmd);
		qlt_free_mcmd(mcmd);
		return;
	}

	cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
	qlt_free_cmd(cmd);
}

static int tcm_qla2xxx_shutdown_session(struct se_session *se_sess)
{
	struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
	struct scsi_qla_host *vha;
	unsigned long flags;

	BUG_ON(!sess);
	vha = sess->vha;

	spin_lock_irqsave(&vha->hw->hardware_lock, flags);
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	target_sess_cmd_list_set_waiting(se_sess);
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	spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);

	return 1;
}

static void tcm_qla2xxx_close_session(struct se_session *se_sess)
{
	struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
	struct scsi_qla_host *vha;
	unsigned long flags;

	BUG_ON(!sess);
	vha = sess->vha;

	spin_lock_irqsave(&vha->hw->hardware_lock, flags);
	qlt_unreg_sess(sess);
	spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
}

static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
{
	return 0;
}

static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
{
	struct qla_tgt_cmd *cmd = container_of(se_cmd,
				struct qla_tgt_cmd, se_cmd);

	cmd->bufflen = se_cmd->data_length;
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	cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
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	cmd->sg_cnt = se_cmd->t_data_nents;
	cmd->sg = se_cmd->t_data_sg;

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	cmd->prot_sg_cnt = se_cmd->t_prot_nents;
	cmd->prot_sg = se_cmd->t_prot_sg;
	cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
	se_cmd->pi_err = 0;

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	/*
	 * qla_target.c:qlt_rdy_to_xfer() will call pci_map_sg() to setup
	 * the SGL mappings into PCIe memory for incoming FCP WRITE data.
	 */
	return qlt_rdy_to_xfer(cmd);
}

static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd)
{
	unsigned long flags;
	/*
	 * Check for WRITE_PENDING status to determine if we need to wait for
	 * CTIO aborts to be posted via hardware in tcm_qla2xxx_handle_data().
	 */
	spin_lock_irqsave(&se_cmd->t_state_lock, flags);
	if (se_cmd->t_state == TRANSPORT_WRITE_PENDING ||
	    se_cmd->t_state == TRANSPORT_COMPLETE_QF_WP) {
		spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
		wait_for_completion_timeout(&se_cmd->t_transport_stop_comp,
						3000);
		return 0;
	}
	spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);

	return 0;
}

static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
{
	return;
}

static u32 tcm_qla2xxx_get_task_tag(struct se_cmd *se_cmd)
{
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	struct qla_tgt_cmd *cmd;

	/* check for task mgmt cmd */
	if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
		return 0xffffffff;

	cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
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	return cmd->tag;
}

static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
{
	return 0;
}

/*
 * Called from process context in qla_target.c:qlt_do_work() code
 */
static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
	unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
	int data_dir, int bidi)
{
	struct se_cmd *se_cmd = &cmd->se_cmd;
	struct se_session *se_sess;
	struct qla_tgt_sess *sess;
	int flags = TARGET_SCF_ACK_KREF;

	if (bidi)
		flags |= TARGET_SCF_BIDI_OP;

	sess = cmd->sess;
	if (!sess) {
		pr_err("Unable to locate struct qla_tgt_sess from qla_tgt_cmd\n");
		return -EINVAL;
	}

	se_sess = sess->se_sess;
	if (!se_sess) {
		pr_err("Unable to locate active struct se_session\n");
		return -EINVAL;
	}

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	return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
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				cmd->unpacked_lun, data_length, fcp_task_attr,
				data_dir, flags);
}

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static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
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{
	struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);

	/*
	 * Ensure that the complete FCP WRITE payload has been received.
	 * Otherwise return an exception via CHECK_CONDITION status.
	 */
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	cmd->cmd_in_wq = 0;
	cmd->cmd_flags |= BIT_11;
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	if (!cmd->write_data_transferred) {
		/*
		 * Check if se_cmd has already been aborted via LUN_RESET, and
		 * waiting upon completion in tcm_qla2xxx_write_pending_status()
		 */
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		if (cmd->se_cmd.transport_state & CMD_T_ABORTED) {
			complete(&cmd->se_cmd.t_transport_stop_comp);
			return;
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		}

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		if (cmd->se_cmd.pi_err)
			transport_generic_request_failure(&cmd->se_cmd,
				cmd->se_cmd.pi_err);
		else
			transport_generic_request_failure(&cmd->se_cmd,
				TCM_CHECK_CONDITION_ABORT_CMD);

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		return;
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	}
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	return target_execute_cmd(&cmd->se_cmd);
}

/*
 * Called from qla_target.c:qlt_do_ctio_completion()
 */
static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
{
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	cmd->cmd_flags |= BIT_10;
	cmd->cmd_in_wq = 1;
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	INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
	queue_work(tcm_qla2xxx_free_wq, &cmd->work);
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}

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static void tcm_qla2xxx_handle_dif_work(struct work_struct *work)
{
	struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);

	/* take an extra kref to prevent cmd free too early.
	 * need to wait for SCSI status/check condition to
	 * finish responding generate by transport_generic_request_failure.
	 */
	kref_get(&cmd->se_cmd.cmd_kref);
	transport_generic_request_failure(&cmd->se_cmd, cmd->se_cmd.pi_err);
}

/*
 * Called from qla_target.c:qlt_do_ctio_completion()
 */
static void tcm_qla2xxx_handle_dif_err(struct qla_tgt_cmd *cmd)
{
	INIT_WORK(&cmd->work, tcm_qla2xxx_handle_dif_work);
	queue_work(tcm_qla2xxx_free_wq, &cmd->work);
}

644 645 646
/*
 * Called from qla_target.c:qlt_issue_task_mgmt()
 */
647 648
static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, uint32_t lun,
	uint8_t tmr_func, uint32_t tag)
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{
	struct qla_tgt_sess *sess = mcmd->sess;
	struct se_cmd *se_cmd = &mcmd->se_cmd;

	return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
			tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
}

static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
{
	struct qla_tgt_cmd *cmd = container_of(se_cmd,
				struct qla_tgt_cmd, se_cmd);

662
	cmd->cmd_flags |= BIT_4;
663
	cmd->bufflen = se_cmd->data_length;
664
	cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
665 666 667 668 669
	cmd->aborted = (se_cmd->transport_state & CMD_T_ABORTED);

	cmd->sg_cnt = se_cmd->t_data_nents;
	cmd->sg = se_cmd->t_data_sg;
	cmd->offset = 0;
670
	cmd->cmd_flags |= BIT_3;
671

672 673 674 675 676
	cmd->prot_sg_cnt = se_cmd->t_prot_nents;
	cmd->prot_sg = se_cmd->t_prot_sg;
	cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
	se_cmd->pi_err = 0;

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	/*
	 * Now queue completed DATA_IN the qla2xxx LLD and response ring
	 */
	return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
				se_cmd->scsi_status);
}

static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
{
	struct qla_tgt_cmd *cmd = container_of(se_cmd,
				struct qla_tgt_cmd, se_cmd);
	int xmit_type = QLA_TGT_XMIT_STATUS;

	cmd->bufflen = se_cmd->data_length;
	cmd->sg = NULL;
	cmd->sg_cnt = 0;
	cmd->offset = 0;
694
	cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
695
	cmd->aborted = (se_cmd->transport_state & CMD_T_ABORTED);
696 697 698 699 700
	if (cmd->cmd_flags &  BIT_5) {
		pr_crit("Bit_5 already set for cmd = %p.\n", cmd);
		dump_stack();
	}
	cmd->cmd_flags |= BIT_5;
701 702 703 704 705 706

	if (se_cmd->data_direction == DMA_FROM_DEVICE) {
		/*
		 * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
		 * for qla_tgt_xmit_response LLD code
		 */
707 708 709 710
		if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
			se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
			se_cmd->residual_count = 0;
		}
711
		se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
712
		se_cmd->residual_count += se_cmd->data_length;
713 714 715 716 717 718 719 720 721

		cmd->bufflen = 0;
	}
	/*
	 * Now queue status response to qla2xxx LLD code and response ring
	 */
	return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
}

722
static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755
{
	struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
	struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
				struct qla_tgt_mgmt_cmd, se_cmd);

	pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
			mcmd, se_tmr->function, se_tmr->response);
	/*
	 * Do translation between TCM TM response codes and
	 * QLA2xxx FC TM response codes.
	 */
	switch (se_tmr->response) {
	case TMR_FUNCTION_COMPLETE:
		mcmd->fc_tm_rsp = FC_TM_SUCCESS;
		break;
	case TMR_TASK_DOES_NOT_EXIST:
		mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
		break;
	case TMR_FUNCTION_REJECTED:
		mcmd->fc_tm_rsp = FC_TM_REJECT;
		break;
	case TMR_LUN_DOES_NOT_EXIST:
	default:
		mcmd->fc_tm_rsp = FC_TM_FAILED;
		break;
	}
	/*
	 * Queue the TM response to QLA2xxx LLD to build a
	 * CTIO response packet.
	 */
	qlt_xmit_tm_rsp(mcmd);
}

756 757 758 759 760 761 762 763 764 765 766 767 768 769
static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
{
	struct qla_tgt_cmd *cmd = container_of(se_cmd,
				struct qla_tgt_cmd, se_cmd);
	struct scsi_qla_host *vha = cmd->vha;
	struct qla_hw_data *ha = vha->hw;

	if (!cmd->sg_mapped)
		return;

	pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
	cmd->sg_mapped = 0;
}

770 771
static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
			struct tcm_qla2xxx_nacl *, struct qla_tgt_sess *);
772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788
/*
 * Expected to be called with struct qla_hw_data->hardware_lock held
 */
static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct qla_tgt_sess *sess)
{
	struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
	struct se_portal_group *se_tpg = se_nacl->se_tpg;
	struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
	struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
				struct tcm_qla2xxx_lport, lport_wwn);
	struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
				struct tcm_qla2xxx_nacl, se_node_acl);
	void *node;

	pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);

	node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
789 790 791 792 793 794 795 796 797 798
	if (WARN_ON(node && (node != se_nacl))) {
		/*
		 * The nacl no longer matches what we think it should be.
		 * Most likely a new dynamic acl has been added while
		 * someone dropped the hardware lock.  It clearly is a
		 * bug elsewhere, but this bit can't make things worse.
		 */
		btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
			       node, GFP_ATOMIC);
	}
799 800 801

	pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
	    se_nacl, nacl->nport_wwnn, nacl->nport_id);
802 803 804 805 806 807 808 809 810 811
	/*
	 * Now clear the se_nacl and session pointers from our HW lport lookup
	 * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
	 *
	 * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
	 * target_wait_for_sess_cmds() before the session waits for outstanding
	 * I/O to complete, to avoid a race between session shutdown execution
	 * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
	 */
	tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
812 813
}

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static void tcm_qla2xxx_release_session(struct kref *kref)
{
	struct se_session *se_sess = container_of(kref,
			struct se_session, sess_kref);

	qlt_unreg_sess(se_sess->fabric_sess_ptr);
}

static void tcm_qla2xxx_put_session(struct se_session *se_sess)
{
	struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
	struct qla_hw_data *ha = sess->vha->hw;
	unsigned long flags;

	spin_lock_irqsave(&ha->hardware_lock, flags);
	kref_put(&se_sess->sess_kref, tcm_qla2xxx_release_session);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
}

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static void tcm_qla2xxx_put_sess(struct qla_tgt_sess *sess)
{
835 836 837
	if (!sess)
		return;

838 839
	assert_spin_locked(&sess->vha->hw->hardware_lock);
	kref_put(&sess->se_sess->sess_kref, tcm_qla2xxx_release_session);
840 841 842 843
}

static void tcm_qla2xxx_shutdown_sess(struct qla_tgt_sess *sess)
{
844 845
	assert_spin_locked(&sess->vha->hw->hardware_lock);
	target_sess_cmd_list_set_waiting(sess->se_sess);
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}

static struct se_node_acl *tcm_qla2xxx_make_nodeacl(
	struct se_portal_group *se_tpg,
	struct config_group *group,
	const char *name)
{
	struct se_node_acl *se_nacl, *se_nacl_new;
	struct tcm_qla2xxx_nacl *nacl;
	u64 wwnn;
	u32 qla2xxx_nexus_depth;

	if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
		return ERR_PTR(-EINVAL);

	se_nacl_new = tcm_qla2xxx_alloc_fabric_acl(se_tpg);
	if (!se_nacl_new)
		return ERR_PTR(-ENOMEM);
/* #warning FIXME: Hardcoded qla2xxx_nexus depth in tcm_qla2xxx_make_nodeacl */
	qla2xxx_nexus_depth = 1;

	/*
	 * se_nacl_new may be released by core_tpg_add_initiator_node_acl()
	 * when converting a NodeACL from demo mode -> explict
	 */
	se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new,
				name, qla2xxx_nexus_depth);
	if (IS_ERR(se_nacl)) {
		tcm_qla2xxx_release_fabric_acl(se_tpg, se_nacl_new);
		return se_nacl;
	}
	/*
	 * Locate our struct tcm_qla2xxx_nacl and set the FC Nport WWPN
	 */
	nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
	nacl->nport_wwnn = wwnn;
	tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);

	return se_nacl;
}

static void tcm_qla2xxx_drop_nodeacl(struct se_node_acl *se_acl)
{
	struct se_portal_group *se_tpg = se_acl->se_tpg;
	struct tcm_qla2xxx_nacl *nacl = container_of(se_acl,
				struct tcm_qla2xxx_nacl, se_node_acl);

	core_tpg_del_initiator_node_acl(se_tpg, se_acl, 1);
	kfree(nacl);
}

/* Start items for tcm_qla2xxx_tpg_attrib_cit */

#define DEF_QLA_TPG_ATTRIB(name)					\
									\
static ssize_t tcm_qla2xxx_tpg_attrib_show_##name(			\
	struct se_portal_group *se_tpg,					\
	char *page)							\
{									\
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,		\
			struct tcm_qla2xxx_tpg, se_tpg);		\
									\
908
	return sprintf(page, "%u\n", tpg->tpg_attrib.name);	\
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}									\
									\
static ssize_t tcm_qla2xxx_tpg_attrib_store_##name(			\
	struct se_portal_group *se_tpg,					\
	const char *page,						\
	size_t count)							\
{									\
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,		\
			struct tcm_qla2xxx_tpg, se_tpg);		\
	unsigned long val;						\
	int ret;							\
									\
	ret = kstrtoul(page, 0, &val);					\
	if (ret < 0) {							\
		pr_err("kstrtoul() failed with"				\
				" ret: %d\n", ret);			\
		return -EINVAL;						\
	}								\
	ret = tcm_qla2xxx_set_attrib_##name(tpg, val);			\
									\
	return (!ret) ? count : -EINVAL;				\
}

#define DEF_QLA_TPG_ATTR_BOOL(_name)					\
									\
static int tcm_qla2xxx_set_attrib_##_name(				\
	struct tcm_qla2xxx_tpg *tpg,					\
	unsigned long val)						\
{									\
	struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;		\
									\
	if ((val != 0) && (val != 1)) {					\
		pr_err("Illegal boolean value %lu\n", val);		\
		return -EINVAL;						\
	}								\
									\
	a->_name = val;							\
	return 0;							\
}

#define QLA_TPG_ATTR(_name, _mode) \
	TF_TPG_ATTRIB_ATTR(tcm_qla2xxx, _name, _mode);

/*
 * Define tcm_qla2xxx_tpg_attrib_s_generate_node_acls
 */
DEF_QLA_TPG_ATTR_BOOL(generate_node_acls);
DEF_QLA_TPG_ATTRIB(generate_node_acls);
QLA_TPG_ATTR(generate_node_acls, S_IRUGO | S_IWUSR);

/*
 Define tcm_qla2xxx_attrib_s_cache_dynamic_acls
 */
DEF_QLA_TPG_ATTR_BOOL(cache_dynamic_acls);
DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
QLA_TPG_ATTR(cache_dynamic_acls, S_IRUGO | S_IWUSR);

/*
 * Define tcm_qla2xxx_tpg_attrib_s_demo_mode_write_protect
 */
DEF_QLA_TPG_ATTR_BOOL(demo_mode_write_protect);
DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
QLA_TPG_ATTR(demo_mode_write_protect, S_IRUGO | S_IWUSR);

/*
 * Define tcm_qla2xxx_tpg_attrib_s_prod_mode_write_protect
 */
DEF_QLA_TPG_ATTR_BOOL(prod_mode_write_protect);
DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
QLA_TPG_ATTR(prod_mode_write_protect, S_IRUGO | S_IWUSR);

980 981 982 983 984 985 986
/*
 * Define tcm_qla2xxx_tpg_attrib_s_demo_mode_login_only
 */
DEF_QLA_TPG_ATTR_BOOL(demo_mode_login_only);
DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
QLA_TPG_ATTR(demo_mode_login_only, S_IRUGO | S_IWUSR);

987 988 989 990 991
static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
	&tcm_qla2xxx_tpg_attrib_generate_node_acls.attr,
	&tcm_qla2xxx_tpg_attrib_cache_dynamic_acls.attr,
	&tcm_qla2xxx_tpg_attrib_demo_mode_write_protect.attr,
	&tcm_qla2xxx_tpg_attrib_prod_mode_write_protect.attr,
992
	&tcm_qla2xxx_tpg_attrib_demo_mode_login_only.attr,
993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008
	NULL,
};

/* End items for tcm_qla2xxx_tpg_attrib_cit */

static ssize_t tcm_qla2xxx_tpg_show_enable(
	struct se_portal_group *se_tpg,
	char *page)
{
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
			struct tcm_qla2xxx_tpg, se_tpg);

	return snprintf(page, PAGE_SIZE, "%d\n",
			atomic_read(&tpg->lport_tpg_enabled));
}

1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038
static void tcm_qla2xxx_depend_tpg(struct work_struct *work)
{
	struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
				struct tcm_qla2xxx_tpg, tpg_base_work);
	struct se_portal_group *se_tpg = &base_tpg->se_tpg;
	struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;

	if (!configfs_depend_item(se_tpg->se_tpg_tfo->tf_subsys,
				  &se_tpg->tpg_group.cg_item)) {
		atomic_set(&base_tpg->lport_tpg_enabled, 1);
		qlt_enable_vha(base_vha);
	}
	complete(&base_tpg->tpg_base_comp);
}

static void tcm_qla2xxx_undepend_tpg(struct work_struct *work)
{
	struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
				struct tcm_qla2xxx_tpg, tpg_base_work);
	struct se_portal_group *se_tpg = &base_tpg->se_tpg;
	struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;

	if (!qlt_stop_phase1(base_vha->vha_tgt.qla_tgt)) {
		atomic_set(&base_tpg->lport_tpg_enabled, 0);
		configfs_undepend_item(se_tpg->se_tpg_tfo->tf_subsys,
				       &se_tpg->tpg_group.cg_item);
	}
	complete(&base_tpg->tpg_base_comp);
}

1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058
static ssize_t tcm_qla2xxx_tpg_store_enable(
	struct se_portal_group *se_tpg,
	const char *page,
	size_t count)
{
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
			struct tcm_qla2xxx_tpg, se_tpg);
	unsigned long op;
	int rc;

	rc = kstrtoul(page, 0, &op);
	if (rc < 0) {
		pr_err("kstrtoul() returned %d\n", rc);
		return -EINVAL;
	}
	if ((op != 1) && (op != 0)) {
		pr_err("Illegal value for tpg_enable: %lu\n", op);
		return -EINVAL;
	}
	if (op) {
1059 1060 1061 1062
		if (atomic_read(&tpg->lport_tpg_enabled))
			return -EEXIST;

		INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_depend_tpg);
1063
	} else {
1064 1065 1066 1067
		if (!atomic_read(&tpg->lport_tpg_enabled))
			return count;

		INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_undepend_tpg);
1068
	}
1069 1070 1071
	init_completion(&tpg->tpg_base_comp);
	schedule_work(&tpg->tpg_base_work);
	wait_for_completion(&tpg->tpg_base_comp);
1072

1073 1074 1075 1076 1077 1078 1079
	if (op) {
		if (!atomic_read(&tpg->lport_tpg_enabled))
			return -ENODEV;
	} else {
		if (atomic_read(&tpg->lport_tpg_enabled))
			return -EPERM;
	}
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	return count;
}

TF_TPG_BASE_ATTR(tcm_qla2xxx, enable, S_IRUGO | S_IWUSR);

static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
	&tcm_qla2xxx_tpg_enable.attr,
	NULL,
};

static struct se_portal_group *tcm_qla2xxx_make_tpg(
	struct se_wwn *wwn,
	struct config_group *group,
	const char *name)
{
	struct tcm_qla2xxx_lport *lport = container_of(wwn,
			struct tcm_qla2xxx_lport, lport_wwn);
	struct tcm_qla2xxx_tpg *tpg;
	unsigned long tpgt;
	int ret;

	if (strstr(name, "tpgt_") != name)
		return ERR_PTR(-EINVAL);
	if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
		return ERR_PTR(-EINVAL);

1106
	if ((tpgt != 1)) {
1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121
		pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
		return ERR_PTR(-ENOSYS);
	}

	tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
	if (!tpg) {
		pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
		return ERR_PTR(-ENOMEM);
	}
	tpg->lport = lport;
	tpg->lport_tpgt = tpgt;
	/*
	 * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
	 * NodeACLs
	 */
1122 1123 1124 1125
	tpg->tpg_attrib.generate_node_acls = 1;
	tpg->tpg_attrib.demo_mode_write_protect = 1;
	tpg->tpg_attrib.cache_dynamic_acls = 1;
	tpg->tpg_attrib.demo_mode_login_only = 1;
1126 1127 1128 1129 1130 1131 1132

	ret = core_tpg_register(&tcm_qla2xxx_fabric_configfs->tf_ops, wwn,
				&tpg->se_tpg, tpg, TRANSPORT_TPG_TYPE_NORMAL);
	if (ret < 0) {
		kfree(tpg);
		return NULL;
	}
1133 1134

	lport->tpg_1 = tpg;
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	return &tpg->se_tpg;
}

static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
{
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
			struct tcm_qla2xxx_tpg, se_tpg);
	struct tcm_qla2xxx_lport *lport = tpg->lport;
	struct scsi_qla_host *vha = lport->qla_vha;
	/*
	 * Call into qla2x_target.c LLD logic to shutdown the active
	 * FC Nexuses and disable target mode operation for this qla_hw_data
	 */
1149 1150
	if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
		qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1151 1152 1153 1154 1155

	core_tpg_deregister(se_tpg);
	/*
	 * Clear local TPG=1 pointer for non NPIV mode.
	 */
1156
	lport->tpg_1 = NULL;
1157 1158 1159
	kfree(tpg);
}

1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213
static ssize_t tcm_qla2xxx_npiv_tpg_show_enable(
	struct se_portal_group *se_tpg,
	char *page)
{
	return tcm_qla2xxx_tpg_show_enable(se_tpg, page);
}

static ssize_t tcm_qla2xxx_npiv_tpg_store_enable(
	struct se_portal_group *se_tpg,
	const char *page,
	size_t count)
{
	struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
	struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
			struct tcm_qla2xxx_lport, lport_wwn);
	struct scsi_qla_host *vha = lport->qla_vha;
	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
			struct tcm_qla2xxx_tpg, se_tpg);
	unsigned long op;
	int rc;

	rc = kstrtoul(page, 0, &op);
	if (rc < 0) {
		pr_err("kstrtoul() returned %d\n", rc);
		return -EINVAL;
	}
	if ((op != 1) && (op != 0)) {
		pr_err("Illegal value for tpg_enable: %lu\n", op);
		return -EINVAL;
	}
	if (op) {
		if (atomic_read(&tpg->lport_tpg_enabled))
			return -EEXIST;

		atomic_set(&tpg->lport_tpg_enabled, 1);
		qlt_enable_vha(vha);
	} else {
		if (!atomic_read(&tpg->lport_tpg_enabled))
			return count;

		atomic_set(&tpg->lport_tpg_enabled, 0);
		qlt_stop_phase1(vha->vha_tgt.qla_tgt);
	}

	return count;
}

TF_TPG_BASE_ATTR(tcm_qla2xxx_npiv, enable, S_IRUGO | S_IWUSR);

static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
        &tcm_qla2xxx_npiv_tpg_enable.attr,
        NULL,
};

1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237
static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(
	struct se_wwn *wwn,
	struct config_group *group,
	const char *name)
{
	struct tcm_qla2xxx_lport *lport = container_of(wwn,
			struct tcm_qla2xxx_lport, lport_wwn);
	struct tcm_qla2xxx_tpg *tpg;
	unsigned long tpgt;
	int ret;

	if (strstr(name, "tpgt_") != name)
		return ERR_PTR(-EINVAL);
	if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
		return ERR_PTR(-EINVAL);

	tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
	if (!tpg) {
		pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
		return ERR_PTR(-ENOMEM);
	}
	tpg->lport = lport;
	tpg->lport_tpgt = tpgt;

1238 1239 1240 1241 1242 1243 1244 1245 1246
	/*
	 * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
	 * NodeACLs
	 */
	tpg->tpg_attrib.generate_node_acls = 1;
	tpg->tpg_attrib.demo_mode_write_protect = 1;
	tpg->tpg_attrib.cache_dynamic_acls = 1;
	tpg->tpg_attrib.demo_mode_login_only = 1;

1247 1248 1249 1250 1251 1252
	ret = core_tpg_register(&tcm_qla2xxx_npiv_fabric_configfs->tf_ops, wwn,
				&tpg->se_tpg, tpg, TRANSPORT_TPG_TYPE_NORMAL);
	if (ret < 0) {
		kfree(tpg);
		return NULL;
	}
1253
	lport->tpg_1 = tpg;
1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268
	return &tpg->se_tpg;
}

/*
 * Expected to be called with struct qla_hw_data->hardware_lock held
 */
static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_s_id(
	scsi_qla_host_t *vha,
	const uint8_t *s_id)
{
	struct tcm_qla2xxx_lport *lport;
	struct se_node_acl *se_nacl;
	struct tcm_qla2xxx_nacl *nacl;
	u32 key;

1269
	lport = vha->vha_tgt.target_lport_ptr;
1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377
	if (!lport) {
		pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
		dump_stack();
		return NULL;
	}

	key = (((unsigned long)s_id[0] << 16) |
	       ((unsigned long)s_id[1] << 8) |
	       (unsigned long)s_id[2]);
	pr_debug("find_sess_by_s_id: 0x%06x\n", key);

	se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
	if (!se_nacl) {
		pr_debug("Unable to locate s_id: 0x%06x\n", key);
		return NULL;
	}
	pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
	    se_nacl, se_nacl->initiatorname);

	nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
	if (!nacl->qla_tgt_sess) {
		pr_err("Unable to locate struct qla_tgt_sess\n");
		return NULL;
	}

	return nacl->qla_tgt_sess;
}

/*
 * Expected to be called with struct qla_hw_data->hardware_lock held
 */
static void tcm_qla2xxx_set_sess_by_s_id(
	struct tcm_qla2xxx_lport *lport,
	struct se_node_acl *new_se_nacl,
	struct tcm_qla2xxx_nacl *nacl,
	struct se_session *se_sess,
	struct qla_tgt_sess *qla_tgt_sess,
	uint8_t *s_id)
{
	u32 key;
	void *slot;
	int rc;

	key = (((unsigned long)s_id[0] << 16) |
	       ((unsigned long)s_id[1] << 8) |
	       (unsigned long)s_id[2]);
	pr_debug("set_sess_by_s_id: %06x\n", key);

	slot = btree_lookup32(&lport->lport_fcport_map, key);
	if (!slot) {
		if (new_se_nacl) {
			pr_debug("Setting up new fc_port entry to new_se_nacl\n");
			nacl->nport_id = key;
			rc = btree_insert32(&lport->lport_fcport_map, key,
					new_se_nacl, GFP_ATOMIC);
			if (rc)
				printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
				    (int)key);
		} else {
			pr_debug("Wiping nonexisting fc_port entry\n");
		}

		qla_tgt_sess->se_sess = se_sess;
		nacl->qla_tgt_sess = qla_tgt_sess;
		return;
	}

	if (nacl->qla_tgt_sess) {
		if (new_se_nacl == NULL) {
			pr_debug("Clearing existing nacl->qla_tgt_sess and fc_port entry\n");
			btree_remove32(&lport->lport_fcport_map, key);
			nacl->qla_tgt_sess = NULL;
			return;
		}
		pr_debug("Replacing existing nacl->qla_tgt_sess and fc_port entry\n");
		btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
		qla_tgt_sess->se_sess = se_sess;
		nacl->qla_tgt_sess = qla_tgt_sess;
		return;
	}

	if (new_se_nacl == NULL) {
		pr_debug("Clearing existing fc_port entry\n");
		btree_remove32(&lport->lport_fcport_map, key);
		return;
	}

	pr_debug("Replacing existing fc_port entry w/o active nacl->qla_tgt_sess\n");
	btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
	qla_tgt_sess->se_sess = se_sess;
	nacl->qla_tgt_sess = qla_tgt_sess;

	pr_debug("Setup nacl->qla_tgt_sess %p by s_id for se_nacl: %p, initiatorname: %s\n",
	    nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname);
}

/*
 * Expected to be called with struct qla_hw_data->hardware_lock held
 */
static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_loop_id(
	scsi_qla_host_t *vha,
	const uint16_t loop_id)
{
	struct tcm_qla2xxx_lport *lport;
	struct se_node_acl *se_nacl;
	struct tcm_qla2xxx_nacl *nacl;
	struct tcm_qla2xxx_fc_loopid *fc_loopid;

1378
	lport = vha->vha_tgt.target_lport_ptr;
1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468
	if (!lport) {
		pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
		dump_stack();
		return NULL;
	}

	pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);

	fc_loopid = lport->lport_loopid_map + loop_id;
	se_nacl = fc_loopid->se_nacl;
	if (!se_nacl) {
		pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
		    loop_id);
		return NULL;
	}

	nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);

	if (!nacl->qla_tgt_sess) {
		pr_err("Unable to locate struct qla_tgt_sess\n");
		return NULL;
	}

	return nacl->qla_tgt_sess;
}

/*
 * Expected to be called with struct qla_hw_data->hardware_lock held
 */
static void tcm_qla2xxx_set_sess_by_loop_id(
	struct tcm_qla2xxx_lport *lport,
	struct se_node_acl *new_se_nacl,
	struct tcm_qla2xxx_nacl *nacl,
	struct se_session *se_sess,
	struct qla_tgt_sess *qla_tgt_sess,
	uint16_t loop_id)
{
	struct se_node_acl *saved_nacl;
	struct tcm_qla2xxx_fc_loopid *fc_loopid;

	pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);

	fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
			lport->lport_loopid_map)[loop_id];

	saved_nacl = fc_loopid->se_nacl;
	if (!saved_nacl) {
		pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
		fc_loopid->se_nacl = new_se_nacl;
		if (qla_tgt_sess->se_sess != se_sess)
			qla_tgt_sess->se_sess = se_sess;
		if (nacl->qla_tgt_sess != qla_tgt_sess)
			nacl->qla_tgt_sess = qla_tgt_sess;
		return;
	}

	if (nacl->qla_tgt_sess) {
		if (new_se_nacl == NULL) {
			pr_debug("Clearing nacl->qla_tgt_sess and fc_loopid->se_nacl\n");
			fc_loopid->se_nacl = NULL;
			nacl->qla_tgt_sess = NULL;
			return;
		}

		pr_debug("Replacing existing nacl->qla_tgt_sess and fc_loopid->se_nacl\n");
		fc_loopid->se_nacl = new_se_nacl;
		if (qla_tgt_sess->se_sess != se_sess)
			qla_tgt_sess->se_sess = se_sess;
		if (nacl->qla_tgt_sess != qla_tgt_sess)
			nacl->qla_tgt_sess = qla_tgt_sess;
		return;
	}

	if (new_se_nacl == NULL) {
		pr_debug("Clearing fc_loopid->se_nacl\n");
		fc_loopid->se_nacl = NULL;
		return;
	}

	pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->qla_tgt_sess\n");
	fc_loopid->se_nacl = new_se_nacl;
	if (qla_tgt_sess->se_sess != se_sess)
		qla_tgt_sess->se_sess = se_sess;
	if (nacl->qla_tgt_sess != qla_tgt_sess)
		nacl->qla_tgt_sess = qla_tgt_sess;

	pr_debug("Setup nacl->qla_tgt_sess %p by loop_id for se_nacl: %p, initiatorname: %s\n",
	    nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname);
}

1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487
/*
 * Should always be called with qla_hw_data->hardware_lock held.
 */
static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
		struct tcm_qla2xxx_nacl *nacl, struct qla_tgt_sess *sess)
{
	struct se_session *se_sess = sess->se_sess;
	unsigned char be_sid[3];

	be_sid[0] = sess->s_id.b.domain;
	be_sid[1] = sess->s_id.b.area;
	be_sid[2] = sess->s_id.b.al_pa;

	tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
				sess, be_sid);
	tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
				sess, sess->loop_id);
}

1488 1489 1490 1491
static void tcm_qla2xxx_free_session(struct qla_tgt_sess *sess)
{
	struct qla_tgt *tgt = sess->tgt;
	struct qla_hw_data *ha = tgt->ha;
1492
	scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508
	struct se_session *se_sess;
	struct se_node_acl *se_nacl;
	struct tcm_qla2xxx_lport *lport;
	struct tcm_qla2xxx_nacl *nacl;

	BUG_ON(in_interrupt());

	se_sess = sess->se_sess;
	if (!se_sess) {
		pr_err("struct qla_tgt_sess->se_sess is NULL\n");
		dump_stack();
		return;
	}
	se_nacl = se_sess->se_node_acl;
	nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);

1509
	lport = vha->vha_tgt.target_lport_ptr;
1510 1511 1512 1513 1514
	if (!lport) {
		pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
		dump_stack();
		return;
	}
1515
	target_wait_for_sess_cmds(se_sess);
1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541

	transport_deregister_session_configfs(sess->se_sess);
	transport_deregister_session(sess->se_sess);
}

/*
 * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
 * to locate struct se_node_acl
 */
static int tcm_qla2xxx_check_initiator_node_acl(
	scsi_qla_host_t *vha,
	unsigned char *fc_wwpn,
	void *qla_tgt_sess,
	uint8_t *s_id,
	uint16_t loop_id)
{
	struct qla_hw_data *ha = vha->hw;
	struct tcm_qla2xxx_lport *lport;
	struct tcm_qla2xxx_tpg *tpg;
	struct tcm_qla2xxx_nacl *nacl;
	struct se_portal_group *se_tpg;
	struct se_node_acl *se_nacl;
	struct se_session *se_sess;
	struct qla_tgt_sess *sess = qla_tgt_sess;
	unsigned char port_name[36];
	unsigned long flags;
1542 1543
	int num_tags = (ha->fw_xcb_count) ? ha->fw_xcb_count :
		       TCM_QLA2XXX_DEFAULT_TAGS;
1544

1545
	lport = vha->vha_tgt.target_lport_ptr;
1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560
	if (!lport) {
		pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
		dump_stack();
		return -EINVAL;
	}
	/*
	 * Locate the TPG=1 reference..
	 */
	tpg = lport->tpg_1;
	if (!tpg) {
		pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n");
		return -EINVAL;
	}
	se_tpg = &tpg->se_tpg;

1561 1562 1563
	se_sess = transport_init_session_tags(num_tags,
					      sizeof(struct qla_tgt_cmd),
					      TARGET_PROT_NORMAL);
1564 1565 1566 1567 1568 1569 1570 1571 1572
	if (IS_ERR(se_sess)) {
		pr_err("Unable to initialize struct se_session\n");
		return PTR_ERR(se_sess);
	}
	/*
	 * Format the FCP Initiator port_name into colon seperated values to
	 * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
	 */
	memset(&port_name, 0, 36);
1573
	snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598
	/*
	 * Locate our struct se_node_acl either from an explict NodeACL created
	 * via ConfigFS, or via running in TPG demo mode.
	 */
	se_sess->se_node_acl = core_tpg_check_initiator_node_acl(se_tpg,
					port_name);
	if (!se_sess->se_node_acl) {
		transport_free_session(se_sess);
		return -EINVAL;
	}
	se_nacl = se_sess->se_node_acl;
	nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
	/*
	 * And now setup the new se_nacl and session pointers into our HW lport
	 * mappings for fabric S_ID and LOOP_ID.
	 */
	spin_lock_irqsave(&ha->hardware_lock, flags);
	tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess,
			qla_tgt_sess, s_id);
	tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl, se_sess,
			qla_tgt_sess, loop_id);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
	/*
	 * Finally register the new FC Nexus with TCM
	 */
1599
	transport_register_session(se_nacl->se_tpg, se_nacl, se_sess, sess);
1600 1601 1602 1603

	return 0;
}

1604 1605 1606 1607 1608
static void tcm_qla2xxx_update_sess(struct qla_tgt_sess *sess, port_id_t s_id,
				    uint16_t loop_id, bool conf_compl_supported)
{
	struct qla_tgt *tgt = sess->tgt;
	struct qla_hw_data *ha = tgt->ha;
1609 1610
	scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
	struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1611 1612 1613 1614 1615 1616 1617
	struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
	struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
			struct tcm_qla2xxx_nacl, se_node_acl);
	u32 key;


	if (sess->loop_id != loop_id || sess->s_id.b24 != s_id.b24)
1618 1619 1620 1621 1622
		pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
		    sess, sess->port_name,
		    sess->loop_id, loop_id, sess->s_id.b.domain,
		    sess->s_id.b.area, sess->s_id.b.al_pa, s_id.b.domain,
		    s_id.b.area, s_id.b.al_pa);
1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672

	if (sess->loop_id != loop_id) {
		/*
		 * Because we can shuffle loop IDs around and we
		 * update different sessions non-atomically, we might
		 * have overwritten this session's old loop ID
		 * already, and we might end up overwriting some other
		 * session that will be updated later.  So we have to
		 * be extra careful and we can't warn about those things...
		 */
		if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
			lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;

		lport->lport_loopid_map[loop_id].se_nacl = se_nacl;

		sess->loop_id = loop_id;
	}

	if (sess->s_id.b24 != s_id.b24) {
		key = (((u32) sess->s_id.b.domain << 16) |
		       ((u32) sess->s_id.b.area   <<  8) |
		       ((u32) sess->s_id.b.al_pa));

		if (btree_lookup32(&lport->lport_fcport_map, key))
			WARN(btree_remove32(&lport->lport_fcport_map, key) != se_nacl,
			     "Found wrong se_nacl when updating s_id %x:%x:%x\n",
			     sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa);
		else
			WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
			     sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa);

		key = (((u32) s_id.b.domain << 16) |
		       ((u32) s_id.b.area   <<  8) |
		       ((u32) s_id.b.al_pa));

		if (btree_lookup32(&lport->lport_fcport_map, key)) {
			WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
			     s_id.b.domain, s_id.b.area, s_id.b.al_pa);
			btree_update32(&lport->lport_fcport_map, key, se_nacl);
		} else {
			btree_insert32(&lport->lport_fcport_map, key, se_nacl, GFP_ATOMIC);
		}

		sess->s_id = s_id;
		nacl->nport_id = key;
	}

	sess->conf_compl_supported = conf_compl_supported;
}

1673 1674 1675 1676 1677 1678
/*
 * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
 */
static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
	.handle_cmd		= tcm_qla2xxx_handle_cmd,
	.handle_data		= tcm_qla2xxx_handle_data,
1679
	.handle_dif_err		= tcm_qla2xxx_handle_dif_err,
1680 1681 1682 1683
	.handle_tmr		= tcm_qla2xxx_handle_tmr,
	.free_cmd		= tcm_qla2xxx_free_cmd,
	.free_mcmd		= tcm_qla2xxx_free_mcmd,
	.free_session		= tcm_qla2xxx_free_session,
1684
	.update_sess		= tcm_qla2xxx_update_sess,
1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717
	.check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
	.find_sess_by_s_id	= tcm_qla2xxx_find_sess_by_s_id,
	.find_sess_by_loop_id	= tcm_qla2xxx_find_sess_by_loop_id,
	.clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
	.put_sess		= tcm_qla2xxx_put_sess,
	.shutdown_sess		= tcm_qla2xxx_shutdown_sess,
};

static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
{
	int rc;

	rc = btree_init32(&lport->lport_fcport_map);
	if (rc) {
		pr_err("Unable to initialize lport->lport_fcport_map btree\n");
		return rc;
	}

	lport->lport_loopid_map = vmalloc(sizeof(struct tcm_qla2xxx_fc_loopid) *
				65536);
	if (!lport->lport_loopid_map) {
		pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
		    sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
		btree_destroy32(&lport->lport_fcport_map);
		return -ENOMEM;
	}
	memset(lport->lport_loopid_map, 0, sizeof(struct tcm_qla2xxx_fc_loopid)
	       * 65536);
	pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
	       sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
	return 0;
}

1718 1719 1720
static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
					 void *target_lport_ptr,
					 u64 npiv_wwpn, u64 npiv_wwnn)
1721
{
1722 1723 1724
	struct qla_hw_data *ha = vha->hw;
	struct tcm_qla2xxx_lport *lport =
			(struct tcm_qla2xxx_lport *)target_lport_ptr;
1725
	/*
1726
	 * Setup tgt_ops, local pointer to vha and target_lport_ptr
1727
	 */
1728 1729
	ha->tgt.tgt_ops = &tcm_qla2xxx_template;
	vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754
	lport->qla_vha = vha;

	return 0;
}

static struct se_wwn *tcm_qla2xxx_make_lport(
	struct target_fabric_configfs *tf,
	struct config_group *group,
	const char *name)
{
	struct tcm_qla2xxx_lport *lport;
	u64 wwpn;
	int ret = -ENODEV;

	if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
		return ERR_PTR(-EINVAL);

	lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
	if (!lport) {
		pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
		return ERR_PTR(-ENOMEM);
	}
	lport->lport_wwpn = wwpn;
	tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
				wwpn);
1755
	sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1756 1757 1758 1759 1760

	ret = tcm_qla2xxx_init_lport(lport);
	if (ret != 0)
		goto out;

1761 1762
	ret = qlt_lport_register(lport, wwpn, 0, 0,
				 tcm_qla2xxx_lport_register_cb);
1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787
	if (ret != 0)
		goto out_lport;

	return &lport->lport_wwn;
out_lport:
	vfree(lport->lport_loopid_map);
	btree_destroy32(&lport->lport_fcport_map);
out:
	kfree(lport);
	return ERR_PTR(ret);
}

static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
{
	struct tcm_qla2xxx_lport *lport = container_of(wwn,
			struct tcm_qla2xxx_lport, lport_wwn);
	struct scsi_qla_host *vha = lport->qla_vha;
	struct se_node_acl *node;
	u32 key = 0;

	/*
	 * Call into qla2x_target.c LLD logic to complete the
	 * shutdown of struct qla_tgt after the call to
	 * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
	 */
1788 1789
	if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
		qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1790 1791 1792 1793 1794 1795 1796 1797 1798 1799

	qlt_lport_deregister(vha);

	vfree(lport->lport_loopid_map);
	btree_for_each_safe32(&lport->lport_fcport_map, key, node)
		btree_remove32(&lport->lport_fcport_map, key);
	btree_destroy32(&lport->lport_fcport_map);
	kfree(lport);
}

1800 1801 1802 1803 1804 1805 1806 1807 1808
static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
					      void *target_lport_ptr,
					      u64 npiv_wwpn, u64 npiv_wwnn)
{
	struct fc_vport *vport;
	struct Scsi_Host *sh = base_vha->host;
	struct scsi_qla_host *npiv_vha;
	struct tcm_qla2xxx_lport *lport =
			(struct tcm_qla2xxx_lport *)target_lport_ptr;
1809 1810 1811
	struct tcm_qla2xxx_lport *base_lport =
			(struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
	struct tcm_qla2xxx_tpg *base_tpg;
1812 1813 1814 1815 1816 1817 1818
	struct fc_vport_identifiers vport_id;

	if (!qla_tgt_mode_enabled(base_vha)) {
		pr_err("qla2xxx base_vha not enabled for target mode\n");
		return -EPERM;
	}

1819 1820 1821 1822 1823 1824 1825
	if (!base_lport || !base_lport->tpg_1 ||
	    !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
		pr_err("qla2xxx base_lport or tpg_1 not available\n");
		return -EPERM;
	}
	base_tpg = base_lport->tpg_1;

1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848
	memset(&vport_id, 0, sizeof(vport_id));
	vport_id.port_name = npiv_wwpn;
	vport_id.node_name = npiv_wwnn;
	vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
	vport_id.vport_type = FC_PORTTYPE_NPIV;
	vport_id.disable = false;

	vport = fc_vport_create(sh, 0, &vport_id);
	if (!vport) {
		pr_err("fc_vport_create failed for qla2xxx_npiv\n");
		return -ENODEV;
	}
	/*
	 * Setup local pointer to NPIV vhba + target_lport_ptr
	 */
	npiv_vha = (struct scsi_qla_host *)vport->dd_data;
	npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
	lport->qla_vha = npiv_vha;
	scsi_host_get(npiv_vha->host);
	return 0;
}


1849 1850 1851 1852 1853 1854
static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
	struct target_fabric_configfs *tf,
	struct config_group *group,
	const char *name)
{
	struct tcm_qla2xxx_lport *lport;
1855 1856
	u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
	char *p, tmp[128];
1857 1858
	int ret;

1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872
	snprintf(tmp, 128, "%s", name);

	p = strchr(tmp, '@');
	if (!p) {
		pr_err("Unable to locate NPIV '@' seperator\n");
		return ERR_PTR(-EINVAL);
	}
	*p++ = '\0';

	if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
		return ERR_PTR(-EINVAL);

	if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
				       &npiv_wwpn, &npiv_wwnn) < 0)
1873 1874 1875 1876 1877 1878 1879 1880 1881
		return ERR_PTR(-EINVAL);

	lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
	if (!lport) {
		pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
		return ERR_PTR(-ENOMEM);
	}
	lport->lport_npiv_wwpn = npiv_wwpn;
	lport->lport_npiv_wwnn = npiv_wwnn;
1882
	sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1883

1884
	ret = tcm_qla2xxx_init_lport(lport);
1885 1886 1887
	if (ret != 0)
		goto out;

1888 1889
	ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
				 tcm_qla2xxx_lport_register_npiv_cb);
1890 1891 1892
	if (ret != 0)
		goto out_lport;

1893
	return &lport->lport_wwn;
1894 1895 1896
out_lport:
	vfree(lport->lport_loopid_map);
	btree_destroy32(&lport->lport_fcport_map);
1897 1898 1899 1900 1901 1902 1903 1904 1905
out:
	kfree(lport);
	return ERR_PTR(ret);
}

static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
{
	struct tcm_qla2xxx_lport *lport = container_of(wwn,
			struct tcm_qla2xxx_lport, lport_wwn);
1906 1907 1908 1909 1910
	struct scsi_qla_host *npiv_vha = lport->qla_vha;
	struct qla_hw_data *ha = npiv_vha->hw;
	scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);

	scsi_host_put(npiv_vha->host);
1911
	/*
1912
	 * Notify libfc that we want to release the vha->fc_vport
1913
	 */
1914 1915
	fc_vport_terminate(npiv_vha->fc_vport);
	scsi_host_put(base_vha->host);
1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951
	kfree(lport);
}


static ssize_t tcm_qla2xxx_wwn_show_attr_version(
	struct target_fabric_configfs *tf,
	char *page)
{
	return sprintf(page,
	    "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on "
	    UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
	    utsname()->machine);
}

TF_WWN_ATTR_RO(tcm_qla2xxx, version);

static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
	&tcm_qla2xxx_wwn_version.attr,
	NULL,
};

static struct target_core_fabric_ops tcm_qla2xxx_ops = {
	.get_fabric_name		= tcm_qla2xxx_get_fabric_name,
	.get_fabric_proto_ident		= tcm_qla2xxx_get_fabric_proto_ident,
	.tpg_get_wwn			= tcm_qla2xxx_get_fabric_wwn,
	.tpg_get_tag			= tcm_qla2xxx_get_tag,
	.tpg_get_default_depth		= tcm_qla2xxx_get_default_depth,
	.tpg_get_pr_transport_id	= tcm_qla2xxx_get_pr_transport_id,
	.tpg_get_pr_transport_id_len	= tcm_qla2xxx_get_pr_transport_id_len,
	.tpg_parse_pr_out_transport_id	= tcm_qla2xxx_parse_pr_out_transport_id,
	.tpg_check_demo_mode		= tcm_qla2xxx_check_demo_mode,
	.tpg_check_demo_mode_cache	= tcm_qla2xxx_check_demo_mode_cache,
	.tpg_check_demo_mode_write_protect =
					tcm_qla2xxx_check_demo_write_protect,
	.tpg_check_prod_mode_write_protect =
					tcm_qla2xxx_check_prod_write_protect,
1952
	.tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1953 1954 1955 1956 1957
	.tpg_alloc_fabric_acl		= tcm_qla2xxx_alloc_fabric_acl,
	.tpg_release_fabric_acl		= tcm_qla2xxx_release_fabric_acl,
	.tpg_get_inst_index		= tcm_qla2xxx_tpg_get_inst_index,
	.check_stop_free		= tcm_qla2xxx_check_stop_free,
	.release_cmd			= tcm_qla2xxx_release_cmd,
1958
	.put_session			= tcm_qla2xxx_put_session,
1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970
	.shutdown_session		= tcm_qla2xxx_shutdown_session,
	.close_session			= tcm_qla2xxx_close_session,
	.sess_get_index			= tcm_qla2xxx_sess_get_index,
	.sess_get_initiator_sid		= NULL,
	.write_pending			= tcm_qla2xxx_write_pending,
	.write_pending_status		= tcm_qla2xxx_write_pending_status,
	.set_default_node_attributes	= tcm_qla2xxx_set_default_node_attrs,
	.get_task_tag			= tcm_qla2xxx_get_task_tag,
	.get_cmd_state			= tcm_qla2xxx_get_cmd_state,
	.queue_data_in			= tcm_qla2xxx_queue_data_in,
	.queue_status			= tcm_qla2xxx_queue_status,
	.queue_tm_rsp			= tcm_qla2xxx_queue_tm_rsp,
1971
	.aborted_task			= tcm_qla2xxx_aborted_task,
1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990
	/*
	 * Setup function pointers for generic logic in
	 * target_core_fabric_configfs.c
	 */
	.fabric_make_wwn		= tcm_qla2xxx_make_lport,
	.fabric_drop_wwn		= tcm_qla2xxx_drop_lport,
	.fabric_make_tpg		= tcm_qla2xxx_make_tpg,
	.fabric_drop_tpg		= tcm_qla2xxx_drop_tpg,
	.fabric_post_link		= NULL,
	.fabric_pre_unlink		= NULL,
	.fabric_make_np			= NULL,
	.fabric_drop_np			= NULL,
	.fabric_make_nodeacl		= tcm_qla2xxx_make_nodeacl,
	.fabric_drop_nodeacl		= tcm_qla2xxx_drop_nodeacl,
};

static struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
	.get_fabric_name		= tcm_qla2xxx_npiv_get_fabric_name,
	.get_fabric_proto_ident		= tcm_qla2xxx_get_fabric_proto_ident,
1991
	.tpg_get_wwn			= tcm_qla2xxx_get_fabric_wwn,
1992 1993 1994 1995 1996
	.tpg_get_tag			= tcm_qla2xxx_get_tag,
	.tpg_get_default_depth		= tcm_qla2xxx_get_default_depth,
	.tpg_get_pr_transport_id	= tcm_qla2xxx_get_pr_transport_id,
	.tpg_get_pr_transport_id_len	= tcm_qla2xxx_get_pr_transport_id_len,
	.tpg_parse_pr_out_transport_id	= tcm_qla2xxx_parse_pr_out_transport_id,
1997 1998 1999 2000 2001
	.tpg_check_demo_mode		= tcm_qla2xxx_check_demo_mode,
	.tpg_check_demo_mode_cache	= tcm_qla2xxx_check_demo_mode_cache,
	.tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
	.tpg_check_prod_mode_write_protect =
	    tcm_qla2xxx_check_prod_write_protect,
2002
	.tpg_check_demo_mode_login_only	= tcm_qla2xxx_check_demo_mode_login_only,
2003 2004 2005
	.tpg_alloc_fabric_acl		= tcm_qla2xxx_alloc_fabric_acl,
	.tpg_release_fabric_acl		= tcm_qla2xxx_release_fabric_acl,
	.tpg_get_inst_index		= tcm_qla2xxx_tpg_get_inst_index,
2006
	.check_stop_free                = tcm_qla2xxx_check_stop_free,
2007
	.release_cmd			= tcm_qla2xxx_release_cmd,
2008
	.put_session			= tcm_qla2xxx_put_session,
2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
	.shutdown_session		= tcm_qla2xxx_shutdown_session,
	.close_session			= tcm_qla2xxx_close_session,
	.sess_get_index			= tcm_qla2xxx_sess_get_index,
	.sess_get_initiator_sid		= NULL,
	.write_pending			= tcm_qla2xxx_write_pending,
	.write_pending_status		= tcm_qla2xxx_write_pending_status,
	.set_default_node_attributes	= tcm_qla2xxx_set_default_node_attrs,
	.get_task_tag			= tcm_qla2xxx_get_task_tag,
	.get_cmd_state			= tcm_qla2xxx_get_cmd_state,
	.queue_data_in			= tcm_qla2xxx_queue_data_in,
	.queue_status			= tcm_qla2xxx_queue_status,
	.queue_tm_rsp			= tcm_qla2xxx_queue_tm_rsp,
2021
	.aborted_task			= tcm_qla2xxx_aborted_task,
2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060
	/*
	 * Setup function pointers for generic logic in
	 * target_core_fabric_configfs.c
	 */
	.fabric_make_wwn		= tcm_qla2xxx_npiv_make_lport,
	.fabric_drop_wwn		= tcm_qla2xxx_npiv_drop_lport,
	.fabric_make_tpg		= tcm_qla2xxx_npiv_make_tpg,
	.fabric_drop_tpg		= tcm_qla2xxx_drop_tpg,
	.fabric_post_link		= NULL,
	.fabric_pre_unlink		= NULL,
	.fabric_make_np			= NULL,
	.fabric_drop_np			= NULL,
	.fabric_make_nodeacl		= tcm_qla2xxx_make_nodeacl,
	.fabric_drop_nodeacl		= tcm_qla2xxx_drop_nodeacl,
};

static int tcm_qla2xxx_register_configfs(void)
{
	struct target_fabric_configfs *fabric, *npiv_fabric;
	int ret;

	pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on "
	    UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
	    utsname()->machine);
	/*
	 * Register the top level struct config_item_type with TCM core
	 */
	fabric = target_fabric_configfs_init(THIS_MODULE, "qla2xxx");
	if (IS_ERR(fabric)) {
		pr_err("target_fabric_configfs_init() failed\n");
		return PTR_ERR(fabric);
	}
	/*
	 * Setup fabric->tf_ops from our local tcm_qla2xxx_ops
	 */
	fabric->tf_ops = tcm_qla2xxx_ops;
	/*
	 * Setup default attribute lists for various fabric->tf_cit_tmpl
	 */
A
Andy Grover 已提交
2061 2062 2063
	fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = tcm_qla2xxx_wwn_attrs;
	fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs = tcm_qla2xxx_tpg_attrs;
	fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs =
2064
						tcm_qla2xxx_tpg_attrib_attrs;
A
Andy Grover 已提交
2065 2066 2067 2068 2069 2070
	fabric->tf_cit_tmpl.tfc_tpg_param_cit.ct_attrs = NULL;
	fabric->tf_cit_tmpl.tfc_tpg_np_base_cit.ct_attrs = NULL;
	fabric->tf_cit_tmpl.tfc_tpg_nacl_base_cit.ct_attrs = NULL;
	fabric->tf_cit_tmpl.tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;
	fabric->tf_cit_tmpl.tfc_tpg_nacl_auth_cit.ct_attrs = NULL;
	fabric->tf_cit_tmpl.tfc_tpg_nacl_param_cit.ct_attrs = NULL;
2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100
	/*
	 * Register the fabric for use within TCM
	 */
	ret = target_fabric_configfs_register(fabric);
	if (ret < 0) {
		pr_err("target_fabric_configfs_register() failed for TCM_QLA2XXX\n");
		return ret;
	}
	/*
	 * Setup our local pointer to *fabric
	 */
	tcm_qla2xxx_fabric_configfs = fabric;
	pr_debug("TCM_QLA2XXX[0] - Set fabric -> tcm_qla2xxx_fabric_configfs\n");

	/*
	 * Register the top level struct config_item_type for NPIV with TCM core
	 */
	npiv_fabric = target_fabric_configfs_init(THIS_MODULE, "qla2xxx_npiv");
	if (IS_ERR(npiv_fabric)) {
		pr_err("target_fabric_configfs_init() failed\n");
		ret = PTR_ERR(npiv_fabric);
		goto out_fabric;
	}
	/*
	 * Setup fabric->tf_ops from our local tcm_qla2xxx_npiv_ops
	 */
	npiv_fabric->tf_ops = tcm_qla2xxx_npiv_ops;
	/*
	 * Setup default attribute lists for various npiv_fabric->tf_cit_tmpl
	 */
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	npiv_fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = tcm_qla2xxx_wwn_attrs;
2102
	npiv_fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs =
2103
	    tcm_qla2xxx_npiv_tpg_attrs;
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	npiv_fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs = NULL;
	npiv_fabric->tf_cit_tmpl.tfc_tpg_param_cit.ct_attrs = NULL;
	npiv_fabric->tf_cit_tmpl.tfc_tpg_np_base_cit.ct_attrs = NULL;
	npiv_fabric->tf_cit_tmpl.tfc_tpg_nacl_base_cit.ct_attrs = NULL;
	npiv_fabric->tf_cit_tmpl.tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;
	npiv_fabric->tf_cit_tmpl.tfc_tpg_nacl_auth_cit.ct_attrs = NULL;
	npiv_fabric->tf_cit_tmpl.tfc_tpg_nacl_param_cit.ct_attrs = NULL;
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	/*
	 * Register the npiv_fabric for use within TCM
	 */
	ret = target_fabric_configfs_register(npiv_fabric);
	if (ret < 0) {
		pr_err("target_fabric_configfs_register() failed for TCM_QLA2XXX\n");
		goto out_fabric;
	}
	/*
	 * Setup our local pointer to *npiv_fabric
	 */
	tcm_qla2xxx_npiv_fabric_configfs = npiv_fabric;
	pr_debug("TCM_QLA2XXX[0] - Set fabric -> tcm_qla2xxx_npiv_fabric_configfs\n");

	tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
						WQ_MEM_RECLAIM, 0);
	if (!tcm_qla2xxx_free_wq) {
		ret = -ENOMEM;
		goto out_fabric_npiv;
	}

	tcm_qla2xxx_cmd_wq = alloc_workqueue("tcm_qla2xxx_cmd", 0, 0);
	if (!tcm_qla2xxx_cmd_wq) {
		ret = -ENOMEM;
		goto out_free_wq;
	}

	return 0;

out_free_wq:
	destroy_workqueue(tcm_qla2xxx_free_wq);
out_fabric_npiv:
	target_fabric_configfs_deregister(tcm_qla2xxx_npiv_fabric_configfs);
out_fabric:
	target_fabric_configfs_deregister(tcm_qla2xxx_fabric_configfs);
	return ret;
}

static void tcm_qla2xxx_deregister_configfs(void)
{
	destroy_workqueue(tcm_qla2xxx_cmd_wq);
	destroy_workqueue(tcm_qla2xxx_free_wq);

	target_fabric_configfs_deregister(tcm_qla2xxx_fabric_configfs);
	tcm_qla2xxx_fabric_configfs = NULL;
	pr_debug("TCM_QLA2XXX[0] - Cleared tcm_qla2xxx_fabric_configfs\n");

	target_fabric_configfs_deregister(tcm_qla2xxx_npiv_fabric_configfs);
	tcm_qla2xxx_npiv_fabric_configfs = NULL;
	pr_debug("TCM_QLA2XXX[0] - Cleared tcm_qla2xxx_npiv_fabric_configfs\n");
}

static int __init tcm_qla2xxx_init(void)
{
	int ret;

	ret = tcm_qla2xxx_register_configfs();
	if (ret < 0)
		return ret;

	return 0;
}

static void __exit tcm_qla2xxx_exit(void)
{
	tcm_qla2xxx_deregister_configfs();
}

MODULE_DESCRIPTION("TCM QLA2XXX series NPIV enabled fabric driver");
MODULE_LICENSE("GPL");
module_init(tcm_qla2xxx_init);
module_exit(tcm_qla2xxx_exit);