cregit-Linux how code gets into the kernel

Release 4.11 drivers/scsi/hpsa.c

Directory: drivers/scsi
/*
 *    Disk Array driver for HP Smart Array SAS controllers
 *    Copyright 2016 Microsemi Corporation
 *    Copyright 2014-2015 PMC-Sierra, Inc.
 *    Copyright 2000,2009-2015 Hewlett-Packard Development Company, L.P.
 *
 *    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; version 2 of the License.
 *
 *    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, GOOD TITLE or
 *    NON INFRINGEMENT.  See the GNU General Public License for more details.
 *
 *    Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
 *
 */

#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/pci-aspm.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/compat.h>
#include <linux/blktrace_api.h>
#include <linux/uaccess.h>
#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <linux/completion.h>
#include <linux/moduleparam.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_transport_sas.h>
#include <scsi/scsi_dbg.h>
#include <linux/cciss_ioctl.h>
#include <linux/string.h>
#include <linux/bitmap.h>
#include <linux/atomic.h>
#include <linux/jiffies.h>
#include <linux/percpu-defs.h>
#include <linux/percpu.h>
#include <asm/unaligned.h>
#include <asm/div64.h>
#include "hpsa_cmd.h"
#include "hpsa.h"

/*
 * HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.'
 * with an optional trailing '-' followed by a byte value (0-255).
 */

#define HPSA_DRIVER_VERSION "3.4.16-0"

#define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"

#define HPSA "hpsa"

/* How long to wait for CISS doorbell communication */

#define CLEAR_EVENT_WAIT_INTERVAL 20	
/* ms for each msleep() call */

#define MODE_CHANGE_WAIT_INTERVAL 10	
/* ms for each msleep() call */

#define MAX_CLEAR_EVENT_WAIT 30000	
/* times 20 ms = 600 s */

#define MAX_MODE_CHANGE_WAIT 2000	
/* times 10 ms = 20 s */

#define MAX_IOCTL_CONFIG_WAIT 1000

/*define how many times we will try a command because of bus resets */

#define MAX_CMD_RETRIES 3

/* Embedded module documentation macros - see modules.h */
MODULE_AUTHOR("Hewlett-Packard Company");
MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
	HPSA_DRIVER_VERSION);
MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");

MODULE_VERSION(HPSA_DRIVER_VERSION);
MODULE_LICENSE("GPL");


static int hpsa_allow_any;
module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(hpsa_allow_any,
		"Allow hpsa driver to access unknown HP Smart Array hardware");

static int hpsa_simple_mode;
module_param(hpsa_simple_mode, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(hpsa_simple_mode,
	"Use 'simple mode' rather than 'performant mode'");

/* define the PCI info for the cards we can control */

static const struct pci_device_id hpsa_pci_device_id[] = {
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3241},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3243},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3245},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3247},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3249},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324A},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324B},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3233},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3350},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3351},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3352},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3353},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3354},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3355},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3356},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1921},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1922},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1923},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1924},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1926},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1928},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1929},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BD},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BE},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BF},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C0},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C1},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C2},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C3},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C4},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C5},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C6},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C7},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C8},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C9},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CA},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CB},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CC},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CD},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CE},
	{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0580},
	{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0581},
	{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0582},
	{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0583},
	{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0584},
	{PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0585},
	{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0076},
	{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0087},
	{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x007D},
	{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0088},
	{PCI_VENDOR_ID_HP, 0x333f, 0x103c, 0x333f},
	{PCI_VENDOR_ID_HP,     PCI_ANY_ID,	PCI_ANY_ID, PCI_ANY_ID,
		PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
	{0,}
};

MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);

/*  board_id = Subsystem Device ID & Vendor ID
 *  product = Marketing Name for the board
 *  access = Address of the struct of function pointers
 */

static struct board_type products[] = {
	{0x3241103C, "Smart Array P212", &SA5_access},
	{0x3243103C, "Smart Array P410", &SA5_access},
	{0x3245103C, "Smart Array P410i", &SA5_access},
	{0x3247103C, "Smart Array P411", &SA5_access},
	{0x3249103C, "Smart Array P812", &SA5_access},
	{0x324A103C, "Smart Array P712m", &SA5_access},
	{0x324B103C, "Smart Array P711m", &SA5_access},
	{0x3233103C, "HP StorageWorks 1210m", &SA5_access}, /* alias of 333f */
	{0x3350103C, "Smart Array P222", &SA5_access},
	{0x3351103C, "Smart Array P420", &SA5_access},
	{0x3352103C, "Smart Array P421", &SA5_access},
	{0x3353103C, "Smart Array P822", &SA5_access},
	{0x3354103C, "Smart Array P420i", &SA5_access},
	{0x3355103C, "Smart Array P220i", &SA5_access},
	{0x3356103C, "Smart Array P721m", &SA5_access},
	{0x1921103C, "Smart Array P830i", &SA5_access},
	{0x1922103C, "Smart Array P430", &SA5_access},
	{0x1923103C, "Smart Array P431", &SA5_access},
	{0x1924103C, "Smart Array P830", &SA5_access},
	{0x1926103C, "Smart Array P731m", &SA5_access},
	{0x1928103C, "Smart Array P230i", &SA5_access},
	{0x1929103C, "Smart Array P530", &SA5_access},
	{0x21BD103C, "Smart Array P244br", &SA5_access},
	{0x21BE103C, "Smart Array P741m", &SA5_access},
	{0x21BF103C, "Smart HBA H240ar", &SA5_access},
	{0x21C0103C, "Smart Array P440ar", &SA5_access},
	{0x21C1103C, "Smart Array P840ar", &SA5_access},
	{0x21C2103C, "Smart Array P440", &SA5_access},
	{0x21C3103C, "Smart Array P441", &SA5_access},
	{0x21C4103C, "Smart Array", &SA5_access},
	{0x21C5103C, "Smart Array P841", &SA5_access},
	{0x21C6103C, "Smart HBA H244br", &SA5_access},
	{0x21C7103C, "Smart HBA H240", &SA5_access},
	{0x21C8103C, "Smart HBA H241", &SA5_access},
	{0x21C9103C, "Smart Array", &SA5_access},
	{0x21CA103C, "Smart Array P246br", &SA5_access},
	{0x21CB103C, "Smart Array P840", &SA5_access},
	{0x21CC103C, "Smart Array", &SA5_access},
	{0x21CD103C, "Smart Array", &SA5_access},
	{0x21CE103C, "Smart HBA", &SA5_access},
	{0x05809005, "SmartHBA-SA", &SA5_access},
	{0x05819005, "SmartHBA-SA 8i", &SA5_access},
	{0x05829005, "SmartHBA-SA 8i8e", &SA5_access},
	{0x05839005, "SmartHBA-SA 8e", &SA5_access},
	{0x05849005, "SmartHBA-SA 16i", &SA5_access},
	{0x05859005, "SmartHBA-SA 4i4e", &SA5_access},
	{0x00761590, "HP Storage P1224 Array Controller", &SA5_access},
	{0x00871590, "HP Storage P1224e Array Controller", &SA5_access},
	{0x007D1590, "HP Storage P1228 Array Controller", &SA5_access},
	{0x00881590, "HP Storage P1228e Array Controller", &SA5_access},
	{0x333f103c, "HP StorageWorks 1210m Array Controller", &SA5_access},
	{0xFFFF103C, "Unknown Smart Array", &SA5_access},
};


static struct scsi_transport_template *hpsa_sas_transport_template;
static int hpsa_add_sas_host(struct ctlr_info *h);
static void hpsa_delete_sas_host(struct ctlr_info *h);
static int hpsa_add_sas_device(struct hpsa_sas_node *hpsa_sas_node,
			struct hpsa_scsi_dev_t *device);
static void hpsa_remove_sas_device(struct hpsa_scsi_dev_t *device);
static struct hpsa_scsi_dev_t
	*hpsa_find_device_by_sas_rphy(struct ctlr_info *h,
		struct sas_rphy *rphy);


#define SCSI_CMD_BUSY ((struct scsi_cmnd *)&hpsa_cmd_busy)

static const struct scsi_cmnd hpsa_cmd_busy;

#define SCSI_CMD_IDLE ((struct scsi_cmnd *)&hpsa_cmd_idle)

static const struct scsi_cmnd hpsa_cmd_idle;

static int number_of_controllers;

static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);
static int hpsa_ioctl(struct scsi_device *dev, int cmd, void __user *arg);

#ifdef CONFIG_COMPAT
static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd,
	void __user *arg);
#endif

static void cmd_free(struct ctlr_info *h, struct CommandList *c);
static struct CommandList *cmd_alloc(struct ctlr_info *h);
static void cmd_tagged_free(struct ctlr_info *h, struct CommandList *c);
static struct CommandList *cmd_tagged_alloc(struct ctlr_info *h,
					    struct scsi_cmnd *scmd);
static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
	void *buff, size_t size, u16 page_code, unsigned char *scsi3addr,
	int cmd_type);
static void hpsa_free_cmd_pool(struct ctlr_info *h);

#define VPD_PAGE (1 << 8)

#define HPSA_SIMPLE_ERROR_BITS 0x03

static int hpsa_scsi_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
static void hpsa_scan_start(struct Scsi_Host *);
static int hpsa_scan_finished(struct Scsi_Host *sh,
	unsigned long elapsed_time);
static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth);

static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
static int hpsa_eh_abort_handler(struct scsi_cmnd *scsicmd);
static int hpsa_slave_alloc(struct scsi_device *sdev);
static int hpsa_slave_configure(struct scsi_device *sdev);
static void hpsa_slave_destroy(struct scsi_device *sdev);

static void hpsa_update_scsi_devices(struct ctlr_info *h);
static int check_for_unit_attention(struct ctlr_info *h,
	struct CommandList *c);
static void check_ioctl_unit_attention(struct ctlr_info *h,
	struct CommandList *c);
/* performant mode helper functions */
static void calc_bucket_map(int *bucket, int num_buckets,
	int nsgs, int min_blocks, u32 *bucket_map);
static void hpsa_free_performant_mode(struct ctlr_info *h);
static int hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
static inline u32 next_command(struct ctlr_info *h, u8 q);
static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
			       u32 *cfg_base_addr, u64 *cfg_base_addr_index,
			       u64 *cfg_offset);
static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
				    unsigned long *memory_bar);
static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id);
static int wait_for_device_to_become_ready(struct ctlr_info *h,
					   unsigned char lunaddr[],
					   int reply_queue);
static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
				     int wait_for_ready);
static inline void finish_cmd(struct CommandList *c);
static int hpsa_wait_for_mode_change_ack(struct ctlr_info *h);

#define BOARD_NOT_READY 0

#define BOARD_READY 1
static void hpsa_drain_accel_commands(struct ctlr_info *h);
static void hpsa_flush_cache(struct ctlr_info *h);
static int hpsa_scsi_ioaccel_queue_command(struct ctlr_info *h,
	struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
	u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk);
static void hpsa_command_resubmit_worker(struct work_struct *work);
static u32 lockup_detected(struct ctlr_info *h);
static int detect_controller_lockup(struct ctlr_info *h);
static void hpsa_disable_rld_caching(struct ctlr_info *h);
static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
	struct ReportExtendedLUNdata *buf, int bufsize);
static bool hpsa_vpd_page_supported(struct ctlr_info *h,
	unsigned char scsi3addr[], u8 page);
static int hpsa_luns_changed(struct ctlr_info *h);
static bool hpsa_cmd_dev_match(struct ctlr_info *h, struct CommandList *c,
			       struct hpsa_scsi_dev_t *dev,
			       unsigned char *scsi3addr);




static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
{
	unsigned long *priv = shost_priv(sdev->host);
	return (struct ctlr_info *) *priv;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron35100.00%2100.00%


Total35100.00%2100.00%






static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
{
	unsigned long *priv = shost_priv(sh);
	return (struct ctlr_info *) *priv;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron33100.00%2100.00%


Total33100.00%2100.00%






static inline bool hpsa_is_cmd_idle(struct CommandList *c)
{
	return c->scsi_cmd == SCSI_CMD_IDLE;
}


Contributors
PersonTokensPropCommitsCommitProp
Webb Scales19100.00%1100.00%


Total19100.00%1100.00%






static inline bool hpsa_is_pending_event(struct CommandList *c)
{
	return c->abort_pending || c->reset_pending;
}


Contributors
PersonTokensPropCommitsCommitProp
Webb Scales21100.00%1100.00%


Total21100.00%1100.00%



/* extract sense key, asc, and ascq from sense data.  -1 means invalid. */



static void decode_sense_data(const u8 *sense_data, int sense_data_len,
			u8 *sense_key, u8 *asc, u8 *ascq)
{
	struct scsi_sense_hdr sshdr;
	bool rc;

	*sense_key = -1;
	*asc = -1;
	*ascq = -1;

	if (sense_data_len < 1)
		return;

	rc = scsi_normalize_sense(sense_data, sense_data_len, &sshdr);
	if (rc) {
		*sense_key = sshdr.sense_key;
		*asc = sshdr.asc;
		*ascq = sshdr.ascq;
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron97100.00%1100.00%


Total97100.00%1100.00%






static int check_for_unit_attention(struct ctlr_info *h,
	struct CommandList *c)
{
	u8 sense_key, asc, ascq;
	int sense_len;

	if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
		sense_len = sizeof(c->err_info->SenseInfo);
	else
		sense_len = c->err_info->SenseLen;

	decode_sense_data(c->err_info->SenseInfo, sense_len,
				&sense_key, &asc, &ascq);
	if (sense_key != UNIT_ATTENTION || asc == 0xff)
		return 0;

	switch (asc) {
	case STATE_CHANGED:
		dev_warn(&h->pdev->dev,
			"%s: a state change detected, command retried\n",
			h->devname);
		break;
	case LUN_FAILED:
		dev_warn(&h->pdev->dev,
			"%s: LUN failure detected\n", h->devname);
		break;
	case REPORT_LUNS_CHANGED:
		dev_warn(&h->pdev->dev,
			"%s: report LUN data changed\n", h->devname);
	/*
         * Note: this REPORT_LUNS_CHANGED condition only occurs on the external
         * target (array) devices.
         */
		break;
	case POWER_OR_RESET:
		dev_warn(&h->pdev->dev,
			"%s: a power on or device reset detected\n",
			h->devname);
		break;
	case UNIT_ATTENTION_CLEARED:
		dev_warn(&h->pdev->dev,
			"%s: unit attention cleared by another initiator\n",
			h->devname);
		break;
	default:
		dev_warn(&h->pdev->dev,
			"%s: unknown unit attention detected\n",
			h->devname);
		break;
	}
	return 1;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron21093.75%666.67%


Robert Elliott125.36%111.11%


Don Brace10.45%111.11%


Scott Teel10.45%111.11%


Total224100.00%9100.00%






static int check_for_busy(struct ctlr_info *h, struct CommandList *c)
{
	if (c->err_info->CommandStatus != CMD_TARGET_STATUS ||
		(c->err_info->ScsiStatus != SAM_STAT_BUSY &&
		 c->err_info->ScsiStatus != SAM_STAT_TASK_SET_FULL))
		return 0;
	dev_warn(&h->pdev->dev, HPSA "device busy");
	return 1;
}


Contributors
PersonTokensPropCommitsCommitProp
Matt Bondurant63100.00%1100.00%


Total63100.00%1100.00%



static u32 lockup_detected(struct ctlr_info *h);



static ssize_t host_show_lockup_detected(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	int ld;
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);

	h = shost_to_hba(shost);
	ld = lockup_detected(h);

	return sprintf(buf, "ld=%d\n", ld);
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron62100.00%1100.00%


Total62100.00%1100.00%






static ssize_t host_store_hp_ssd_smart_path_status(struct device *dev,
					 struct device_attribute *attr,
					 const char *buf, size_t count)
{
	int status, len;
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);
	char tmpbuf[10];

	if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
		return -EACCES;
	len = count > sizeof(tmpbuf) - 1 ? sizeof(tmpbuf) - 1 : count;
	strncpy(tmpbuf, buf, len);
	tmpbuf[len] = '\0';
	if (sscanf(tmpbuf, "%d", &status) != 1)
		return -EINVAL;
	h = shost_to_hba(shost);
	h->acciopath_status = !!status;
	dev_warn(&h->pdev->dev,
		"hpsa: HP SSD Smart Path %s via sysfs update.\n",
		h->acciopath_status ? "enabled" : "disabled");
	return count;
}


Contributors
PersonTokensPropCommitsCommitProp
Scott Teel160100.00%1100.00%


Total160100.00%1100.00%






static ssize_t host_store_raid_offload_debug(struct device *dev,
					 struct device_attribute *attr,
					 const char *buf, size_t count)
{
	int debug_level, len;
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);
	char tmpbuf[10];

	if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
		return -EACCES;
	len = count > sizeof(tmpbuf) - 1 ? sizeof(tmpbuf) - 1 : count;
	strncpy(tmpbuf, buf, len);
	tmpbuf[len] = '\0';
	if (sscanf(tmpbuf, "%d", &debug_level) != 1)
		return -EINVAL;
	if (debug_level < 0)
		debug_level = 0;
	h = shost_to_hba(shost);
	h->raid_offload_debug = debug_level;
	dev_warn(&h->pdev->dev, "hpsa: Set raid_offload_debug level = %d\n",
		h->raid_offload_debug);
	return count;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron164100.00%1100.00%


Total164100.00%1100.00%






static ssize_t host_store_rescan(struct device *dev,
				 struct device_attribute *attr,
				 const char *buf, size_t count)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);
	h = shost_to_hba(shost);
	hpsa_scan_start(h->scsi_host);
	return count;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron56100.00%3100.00%


Total56100.00%3100.00%






static ssize_t host_show_firmware_revision(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);
	unsigned char *fwrev;

	h = shost_to_hba(shost);
	if (!h->hba_inquiry_data)
		return 0;
	fwrev = &h->hba_inquiry_data[32];
	return snprintf(buf, 20, "%c%c%c%c\n",
		fwrev[0], fwrev[1], fwrev[2], fwrev[3]);
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron97100.00%4100.00%


Total97100.00%4100.00%






static ssize_t host_show_commands_outstanding(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct Scsi_Host *shost = class_to_shost(dev);
	struct ctlr_info *h = shost_to_hba(shost);

	return snprintf(buf, 20, "%d\n",
			atomic_read(&h->commands_outstanding));
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron58100.00%2100.00%


Total58100.00%2100.00%






static ssize_t host_show_transport_mode(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);

	h = shost_to_hba(shost);
	return snprintf(buf, 20, "%s\n",
		h->transMethod & CFGTBL_Trans_Performant ?
			"performant" : "simple");
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron62100.00%2100.00%


Total62100.00%2100.00%






static ssize_t host_show_hp_ssd_smart_path_status(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);

	h = shost_to_hba(shost);
	return snprintf(buf, 30, "HP SSD Smart Path %s\n",
		(h->acciopath_status == 1) ?  "enabled" : "disabled");
}


Contributors
PersonTokensPropCommitsCommitProp
Scott Teel64100.00%1100.00%


Total64100.00%1100.00%



/* List of controllers which cannot be hard reset on kexec with reset_devices */

static u32 unresettable_controller[] = {
	0x324a103C, /* Smart Array P712m */
	0x324b103C, /* Smart Array P711m */
	0x3223103C, /* Smart Array P800 */
	0x3234103C, /* Smart Array P400 */
	0x3235103C, /* Smart Array P400i */
	0x3211103C, /* Smart Array E200i */
	0x3212103C, /* Smart Array E200 */
	0x3213103C, /* Smart Array E200i */
	0x3214103C, /* Smart Array E200i */
	0x3215103C, /* Smart Array E200i */
	0x3237103C, /* Smart Array E500 */
	0x323D103C, /* Smart Array P700m */
	0x40800E11, /* Smart Array 5i */
	0x409C0E11, /* Smart Array 6400 */
	0x409D0E11, /* Smart Array 6400 EM */
	0x40700E11, /* Smart Array 5300 */
	0x40820E11, /* Smart Array 532 */
	0x40830E11, /* Smart Array 5312 */
	0x409A0E11, /* Smart Array 641 */
	0x409B0E11, /* Smart Array 642 */
	0x40910E11, /* Smart Array 6i */
};

/* List of controllers which cannot even be soft reset */

static u32 soft_unresettable_controller[] = {
	0x40800E11, /* Smart Array 5i */
	0x40700E11, /* Smart Array 5300 */
	0x40820E11, /* Smart Array 532 */
	0x40830E11, /* Smart Array 5312 */
	0x409A0E11, /* Smart Array 641 */
	0x409B0E11, /* Smart Array 642 */
	0x40910E11, /* Smart Array 6i */
	/* Exclude 640x boards.  These are two pci devices in one slot
         * which share a battery backed cache module.  One controls the
         * cache, the other accesses the cache through the one that controls
         * it.  If we reset the one controlling the cache, the other will
         * likely not be happy.  Just forbid resetting this conjoined mess.
         * The 640x isn't really supported by hpsa anyway.
         */
	0x409C0E11, /* Smart Array 6400 */
	0x409D0E11, /* Smart Array 6400 EM */
};


static u32 needs_abort_tags_swizzled[] = {
	0x323D103C, /* Smart Array P700m */
	0x324a103C, /* Smart Array P712m */
	0x324b103C, /* SmartArray P711m */
};




static int board_id_in_array(u32 a[], int nelems, u32 board_id)
{
	int i;

	for (i = 0; i < nelems; i++)
		if (a[i] == board_id)
			return 1;
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron47100.00%3100.00%


Total47100.00%3100.00%






static int ctlr_is_hard_resettable(u32 board_id)
{
	return !board_id_in_array(unresettable_controller,
			ARRAY_SIZE(unresettable_controller), board_id);
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron23100.00%2100.00%


Total23100.00%2100.00%






static int ctlr_is_soft_resettable(u32 board_id)
{
	return !board_id_in_array(soft_unresettable_controller,
			ARRAY_SIZE(soft_unresettable_controller), board_id);
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron23100.00%2100.00%


Total23100.00%2100.00%






static int ctlr_is_resettable(u32 board_id)
{
	return ctlr_is_hard_resettable(board_id) ||
		ctlr_is_soft_resettable(board_id);
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron20100.00%1100.00%


Total20100.00%1100.00%






static int ctlr_needs_abort_tags_swizzled(u32 board_id)
{
	return board_id_in_array(needs_abort_tags_swizzled,
			ARRAY_SIZE(needs_abort_tags_swizzled), board_id);
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron22100.00%1100.00%


Total22100.00%1100.00%






static ssize_t host_show_resettable(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);

	h = shost_to_hba(shost);
	return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron59100.00%2100.00%


Total59100.00%2100.00%






static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
{
	return (scsi3addr[3] & 0xC0) == 0x40;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron24100.00%2100.00%


Total24100.00%2100.00%




static const char * const raid_label[] = { "0", "4", "1(+0)", "5", "5+1", "6",
	"1(+0)ADM", "UNKNOWN", "PHYS DRV"
};

#define HPSA_RAID_0	0

#define HPSA_RAID_4	1

#define HPSA_RAID_1	2	
/* also used for RAID 10 */

#define HPSA_RAID_5	3	
/* also used for RAID 50 */

#define HPSA_RAID_51	4

#define HPSA_RAID_6	5	
/* also used for RAID 60 */

#define HPSA_RAID_ADM	6	
/* also used for RAID 1+0 ADM */

#define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 2)

#define PHYSICAL_DRIVE (ARRAY_SIZE(raid_label) - 1)




static inline bool is_logical_device(struct hpsa_scsi_dev_t *device)
{
	return !device->physical_device;
}


Contributors
PersonTokensPropCommitsCommitProp
Kevin Barnett18100.00%1100.00%


Total18100.00%1100.00%






static ssize_t raid_level_show(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	ssize_t l = 0;
	unsigned char rlevel;
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;

	sdev = to_scsi_device(dev);
	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->lock, flags);
	hdev = sdev->hostdata;
	if (!hdev) {
		spin_unlock_irqrestore(&h->lock, flags);
		return -ENODEV;
	}

	/* Is this even a logical drive? */
	if (!is_logical_device(hdev)) {
		spin_unlock_irqrestore(&h->lock, flags);
		l = snprintf(buf, PAGE_SIZE, "N/A\n");
		return l;
	}

	rlevel = hdev->raid_level;
	spin_unlock_irqrestore(&h->lock, flags);
	if (rlevel > RAID_UNKNOWN)
		rlevel = RAID_UNKNOWN;
	l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
	return l;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron13675.98%133.33%


Don Brace4223.46%133.33%


Kevin Barnett10.56%133.33%


Total179100.00%3100.00%






static ssize_t lunid_show(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;
	unsigned char lunid[8];

	sdev = to_scsi_device(dev);
	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->lock, flags);
	hdev = sdev->hostdata;
	if (!hdev) {
		spin_unlock_irqrestore(&h->lock, flags);
		return -ENODEV;
	}
	memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
	spin_unlock_irqrestore(&h->lock, flags);
	return snprintf(buf, 20, "0x%8phN\n", lunid);
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron12896.24%250.00%


Don Brace43.01%125.00%


Rasmus Villemoes10.75%125.00%


Total133100.00%4100.00%






static ssize_t unique_id_show(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;
	unsigned char sn[16];

	sdev = to_scsi_device(dev);
	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->lock, flags);
	hdev = sdev->hostdata;
	if (!hdev) {
		spin_unlock_irqrestore(&h->lock, flags);
		return -ENODEV;
	}
	memcpy(sn, hdev->device_id, sizeof(sn));
	spin_unlock_irqrestore(&h->lock, flags);
	return snprintf(buf, 16 * 2 + 2,
			"%02X%02X%02X%02X%02X%02X%02X%02X"
			"%02X%02X%02X%02X%02X%02X%02X%02X\n",
			sn[0], sn[1], sn[2], sn[3],
			sn[4], sn[5], sn[6], sn[7],
			sn[8], sn[9], sn[10], sn[11],
			sn[12], sn[13], sn[14], sn[15]);
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron216100.00%3100.00%


Total216100.00%3100.00%






static ssize_t sas_address_show(struct device *dev,
	      struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;
	u64 sas_address;

	sdev = to_scsi_device(dev);
	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->lock, flags);
	hdev = sdev->hostdata;
	if (!hdev || is_logical_device(hdev) || !hdev->expose_device) {
		spin_unlock_irqrestore(&h->lock, flags);
		return -ENODEV;
	}
	sas_address = hdev->sas_address;
	spin_unlock_irqrestore(&h->lock, flags);

	return snprintf(buf, PAGE_SIZE, "0x%016llx\n", sas_address);
}


Contributors
PersonTokensPropCommitsCommitProp
Joseph T Handzik131100.00%1100.00%


Total131100.00%1100.00%






static ssize_t host_show_hp_ssd_smart_path_enabled(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;
	int offload_enabled;

	sdev = to_scsi_device(dev);
	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->lock, flags);
	hdev = sdev->hostdata;
	if (!hdev) {
		spin_unlock_irqrestore(&h->lock, flags);
		return -ENODEV;
	}
	offload_enabled = hdev->offload_enabled;
	spin_unlock_irqrestore(&h->lock, flags);
	return snprintf(buf, 20, "%d\n", offload_enabled);
}


Contributors
PersonTokensPropCommitsCommitProp
Joe Handzik6654.55%150.00%


Scott Teel5545.45%150.00%


Total121100.00%2100.00%




#define MAX_PATHS 8



static ssize_t path_info_show(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;
	int i;
	int output_len = 0;
	u8 box;
	u8 bay;
	u8 path_map_index = 0;
	char *active;
	unsigned char phys_connector[2];

	sdev = to_scsi_device(dev);
	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->devlock, flags);
	hdev = sdev->hostdata;
	if (!hdev) {
		spin_unlock_irqrestore(&h->devlock, flags);
		return -ENODEV;
	}

	bay = hdev->bay;
	for (i = 0; i < MAX_PATHS; i++) {
		path_map_index = 1<<i;
		if (i == hdev->active_path_index)
			active = "Active";
		else if (hdev->path_map & path_map_index)
			active = "Inactive";
		else
			continue;

		output_len += scnprintf(buf + output_len,
				PAGE_SIZE - output_len,
				"[%d:%d:%d:%d] %20.20s ",
				h->scsi_host->host_no,
				hdev->bus, hdev->target, hdev->lun,
				scsi_device_type(hdev->devtype));

		if (hdev->devtype == TYPE_RAID || is_logical_device(hdev)) {
			output_len += scnprintf(buf + output_len,
						PAGE_SIZE - output_len,
						"%s\n", active);
			continue;
		}

		box = hdev->box[i];
		memcpy(&phys_connector, &hdev->phys_connector[i],
			sizeof(phys_connector));
		if (phys_connector[0] < '0')
			phys_connector[0] = '0';
		if (phys_connector[1] < '0')
			phys_connector[1] = '0';
		output_len += scnprintf(buf + output_len,
				PAGE_SIZE - output_len,
				"PORT: %.2s ",
				phys_connector);
		if ((hdev->devtype == TYPE_DISK || hdev->devtype == TYPE_ZBC) &&
			hdev->expose_device) {
			if (box == 0 || box == 0xFF) {
				output_len += scnprintf(buf + output_len,
					PAGE_SIZE - output_len,
					"BAY: %hhu %s\n",
					bay, active);
			} else {
				output_len += scnprintf(buf + output_len,
					PAGE_SIZE - output_len,
					"BOX: %hhu BAY: %hhu %s\n",
					box, bay, active);
			}
		} else if (box != 0 && box != 0xFF) {
			output_len += scnprintf(buf + output_len,
				PAGE_SIZE - output_len, "BOX: %hhu %s\n",
				box, active);
		} else
			output_len += scnprintf(buf + output_len,
				PAGE_SIZE - output_len, "%s\n", active);
	}

	spin_unlock_irqrestore(&h->devlock, flags);
	return output_len;
}


Contributors
PersonTokensPropCommitsCommitProp
Joe Handzik38883.62%111.11%


Rasmus Villemoes326.90%111.11%


Scott Teel275.82%222.22%


Don Brace143.02%222.22%


Kevin Barnett30.65%333.33%


Total464100.00%9100.00%






static ssize_t host_show_ctlr_num(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);

	h = shost_to_hba(shost);
	return snprintf(buf, 20, "%d\n", h->ctlr);
}


Contributors
PersonTokensPropCommitsCommitProp
Hannes Reinecke56100.00%1100.00%


Total56100.00%1100.00%



static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
static DEVICE_ATTR(sas_address, S_IRUGO, sas_address_show, NULL);
static DEVICE_ATTR(hp_ssd_smart_path_enabled, S_IRUGO,
			host_show_hp_ssd_smart_path_enabled, NULL);
static DEVICE_ATTR(path_info, S_IRUGO, path_info_show, NULL);
static DEVICE_ATTR(hp_ssd_smart_path_status, S_IWUSR|S_IRUGO|S_IROTH,
		host_show_hp_ssd_smart_path_status,
		host_store_hp_ssd_smart_path_status);
static DEVICE_ATTR(raid_offload_debug, S_IWUSR, NULL,
			host_store_raid_offload_debug);
static DEVICE_ATTR(firmware_revision, S_IRUGO,
	host_show_firmware_revision, NULL);
static DEVICE_ATTR(commands_outstanding, S_IRUGO,
	host_show_commands_outstanding, NULL);
static DEVICE_ATTR(transport_mode, S_IRUGO,
	host_show_transport_mode, NULL);
static DEVICE_ATTR(resettable, S_IRUGO,
	host_show_resettable, NULL);
static DEVICE_ATTR(lockup_detected, S_IRUGO,
	host_show_lockup_detected, NULL);
static DEVICE_ATTR(ctlr_num, S_IRUGO,
	host_show_ctlr_num, NULL);


static struct device_attribute *hpsa_sdev_attrs[] = {
	&dev_attr_raid_level,
	&dev_attr_lunid,
	&dev_attr_unique_id,
	&dev_attr_hp_ssd_smart_path_enabled,
	&dev_attr_path_info,
	&dev_attr_sas_address,
	NULL,
};


static struct device_attribute *hpsa_shost_attrs[] = {
	&dev_attr_rescan,
	&dev_attr_firmware_revision,
	&dev_attr_commands_outstanding,
	&dev_attr_transport_mode,
	&dev_attr_resettable,
	&dev_attr_hp_ssd_smart_path_status,
	&dev_attr_raid_offload_debug,
	&dev_attr_lockup_detected,
	&dev_attr_ctlr_num,
	NULL,
};


#define HPSA_NRESERVED_CMDS	(HPSA_CMDS_RESERVED_FOR_ABORTS + \
                HPSA_CMDS_RESERVED_FOR_DRIVER + HPSA_MAX_CONCURRENT_PASSTHRUS)


static struct scsi_host_template hpsa_driver_template = {
	.module			= THIS_MODULE,
	.name			= HPSA,
	.proc_name		= HPSA,
	.queuecommand		= hpsa_scsi_queue_command,
	.scan_start		= hpsa_scan_start,
	.scan_finished		= hpsa_scan_finished,
	.change_queue_depth	= hpsa_change_queue_depth,
	.this_id		= -1,
	.use_clustering		= ENABLE_CLUSTERING,
	.eh_abort_handler	= hpsa_eh_abort_handler,
	.eh_device_reset_handler = hpsa_eh_device_reset_handler,
	.ioctl			= hpsa_ioctl,
	.slave_alloc		= hpsa_slave_alloc,
	.slave_configure	= hpsa_slave_configure,
	.slave_destroy		= hpsa_slave_destroy,
#ifdef CONFIG_COMPAT
	.compat_ioctl		= hpsa_compat_ioctl,
#endif
	.sdev_attrs = hpsa_sdev_attrs,
	.shost_attrs = hpsa_shost_attrs,
	.max_sectors = 8192,
	.no_write_same = 1,
};




static inline u32 next_command(struct ctlr_info *h, u8 q)
{
	u32 a;
	struct reply_queue_buffer *rq = &h->reply_queue[q];

	if (h->transMethod & CFGTBL_Trans_io_accel1)
		return h->access.command_completed(h, q);

	if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
		return h->access.command_completed(h, q);

	if ((rq->head[rq->current_entry] & 1) == rq->wraparound) {
		a = rq->head[rq->current_entry];
		rq->current_entry++;
		atomic_dec(&h->commands_outstanding);
	} else {
		a = FIFO_EMPTY;
	}
	/* Check for wraparound */
	if (rq->current_entry == h->max_commands) {
		rq->current_entry = 0;
		rq->wraparound ^= 1;
	}
	return a;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron8956.69%457.14%


Matt Gates6843.31%342.86%


Total157100.00%7100.00%



/*
 * There are some special bits in the bus address of the
 * command that we have to set for the controller to know
 * how to process the command:
 *
 * Normal performant mode:
 * bit 0: 1 means performant mode, 0 means simple mode.
 * bits 1-3 = block fetch table entry
 * bits 4-6 = command type (== 0)
 *
 * ioaccel1 mode:
 * bit 0 = "performant mode" bit.
 * bits 1-3 = block fetch table entry
 * bits 4-6 = command type (== 110)
 * (command type is needed because ioaccel1 mode
 * commands are submitted through the same register as normal
 * mode commands, so this is how the controller knows whether
 * the command is normal mode or ioaccel1 mode.)
 *
 * ioaccel2 mode:
 * bit 0 = "performant mode" bit.
 * bits 1-4 = block fetch table entry (note extra bit)
 * bits 4-6 = not needed, because ioaccel2 mode has
 * a separate special register for submitting commands.
 */

/*
 * set_performant_mode: Modify the tag for cciss performant
 * set bit 0 for pull model, bits 3-1 for block fetch
 * register number
 */

#define DEFAULT_REPLY_QUEUE (-1)



static void set_performant_mode(struct ctlr_info *h, struct CommandList *c,
					int reply_queue)
{
	if (likely(h->transMethod & CFGTBL_Trans_Performant)) {
		c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
		if (unlikely(!h->msix_vectors))
			return;
		if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
			c->Header.ReplyQueue =
				raw_smp_processor_id() % h->nreply_queues;
		else
			c->Header.ReplyQueue = reply_queue % h->nreply_queues;
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron4848.48%233.33%


Webb Scales2828.28%116.67%


Matt Gates2121.21%116.67%


John Kacur11.01%116.67%


Christoph Hellwig11.01%116.67%


Total99100.00%6100.00%






static void set_ioaccel1_performant_mode(struct ctlr_info *h,
						struct CommandList *c,
						int reply_queue)
{
	struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[c->cmdindex];

	/*
         * Tell the controller to post the reply to the queue for this
         * processor.  This seems to give the best I/O throughput.
         */
	if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
		cp->ReplyQueue = smp_processor_id() % h->nreply_queues;
	else
		cp->ReplyQueue = reply_queue % h->nreply_queues;
	/*
         * Set the bits in the address sent down to include:
         *  - performant mode bit (bit 0)
         *  - pull count (bits 1-3)
         *  - command type (bits 4-6)
         */
	c->busaddr |= 1 | (h->ioaccel1_blockFetchTable[c->Header.SGList] << 1) |
					IOACCEL1_BUSADDR_CMDTYPE;
}


Contributors
PersonTokensPropCommitsCommitProp
Scott Teel6572.22%150.00%


Webb Scales2527.78%150.00%


Total90100.00%2100.00%






static void set_ioaccel2_tmf_performant_mode(struct ctlr_info *h,
						struct CommandList *c,
						int reply_queue)
{
	struct hpsa_tmf_struct *cp = (struct hpsa_tmf_struct *)
		&h->ioaccel2_cmd_pool[c->cmdindex];

	/* Tell the controller to post the reply to the queue for this
         * processor.  This seems to give the best I/O throughput.
         */
	if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
		cp->reply_queue = smp_processor_id() % h->nreply_queues;
	else
		cp->reply_queue = reply_queue % h->nreply_queues;
	/* Set the bits in the address sent down to include:
         *  - performant mode bit not used in ioaccel mode 2
         *  - pull count (bits 0-3)
         *  - command type isn't needed for ioaccel2
         */
	c->busaddr |= h->ioaccel2_blockFetchTable[0];
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron83100.00%1100.00%


Total83100.00%1100.00%






static void set_ioaccel2_performant_mode(struct ctlr_info *h,
						struct CommandList *c,
						int reply_queue)
{
	struct io_accel2_cmd *cp = &h->ioaccel2_cmd_pool[c->cmdindex];

	/*
         * Tell the controller to post the reply to the queue for this
         * processor.  This seems to give the best I/O throughput.
         */
	if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
		cp->reply_queue = smp_processor_id() % h->nreply_queues;
	else
		cp->reply_queue = reply_queue % h->nreply_queues;
	/*
         * Set the bits in the address sent down to include:
         *  - performant mode bit not used in ioaccel mode 2
         *  - pull count (bits 0-3)
         *  - command type isn't needed for ioaccel2
         */
	c->busaddr |= (h->ioaccel2_blockFetchTable[cp->sg_count]);
}


Contributors
PersonTokensPropCommitsCommitProp
Scott Teel5769.51%150.00%


Webb Scales2530.49%150.00%


Total82100.00%2100.00%






static int is_firmware_flash_cmd(u8 *cdb)
{
	return cdb[0] == BMIC_WRITE && cdb[6] == BMIC_FLASH_FIRMWARE;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron25100.00%1100.00%


Total25100.00%1100.00%



/*
 * During firmware flash, the heartbeat register may not update as frequently
 * as it should.  So we dial down lockup detection during firmware flash. and
 * dial it back up when firmware flash completes.
 */

#define HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH (240 * HZ)

#define HEARTBEAT_SAMPLE_INTERVAL (30 * HZ)



static void dial_down_lockup_detection_during_fw_flash(struct ctlr_info *h,
		struct CommandList *c)
{
	if (!is_firmware_flash_cmd(c->Request.CDB))
		return;
	atomic_inc(&h->firmware_flash_in_progress);
	h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron43100.00%1100.00%


Total43100.00%1100.00%






static void dial_up_lockup_detection_on_fw_flash_complete(struct ctlr_info *h,
		struct CommandList *c)
{
	if (is_firmware_flash_cmd(c->Request.CDB) &&
		atomic_dec_and_test(&h->firmware_flash_in_progress))
		h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron41100.00%1100.00%


Total41100.00%1100.00%






static void __enqueue_cmd_and_start_io(struct ctlr_info *h,
	struct CommandList *c, int reply_queue)
{
	dial_down_lockup_detection_during_fw_flash(h, c);
	atomic_inc(&h->commands_outstanding);
	switch (c->cmd_type) {
	case CMD_IOACCEL1:
		set_ioaccel1_performant_mode(h, c, reply_queue);
		writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
		break;
	case CMD_IOACCEL2:
		set_ioaccel2_performant_mode(h, c, reply_queue);
		writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
		break;
	case IOACCEL2_TMF:
		set_ioaccel2_tmf_performant_mode(h, c, reply_queue);
		writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
		break;
	default:
		set_performant_mode(h, c, reply_queue);
		h->access.submit_command(h, c);
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron9869.50%660.00%


Scott Teel2819.86%110.00%


Webb Scales107.09%110.00%


Don Brace32.13%110.00%


Matt Gates21.42%110.00%


Total141100.00%10100.00%






static void enqueue_cmd_and_start_io(struct ctlr_info *h, struct CommandList *c)
{
	if (unlikely(hpsa_is_pending_event(c)))
		return finish_cmd(c);

	__enqueue_cmd_and_start_io(h, c, DEFAULT_REPLY_QUEUE);
}


Contributors
PersonTokensPropCommitsCommitProp
Webb Scales41100.00%3100.00%


Total41100.00%3100.00%






static inline int is_hba_lunid(unsigned char scsi3addr[])
{
	return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron24100.00%2100.00%


Total24100.00%2100.00%






static inline int is_scsi_rev_5(struct ctlr_info *h)
{
	if (!h->hba_inquiry_data)
		return 0;
	if ((h->hba_inquiry_data[2] & 0x07) == 5)
		return 1;
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron43100.00%2100.00%


Total43100.00%2100.00%






static int hpsa_find_target_lun(struct ctlr_info *h,
	unsigned char scsi3addr[], int bus, int *target, int *lun)
{
	/* finds an unused bus, target, lun for a new physical device
         * assumes h->devlock is held
         */
	int i, found = 0;
	DECLARE_BITMAP(lun_taken, HPSA_MAX_DEVICES);

	bitmap_zero(lun_taken, HPSA_MAX_DEVICES);

	for (i = 0; i < h->ndevices; i++) {
		if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
			__set_bit(h->dev[i]->target, lun_taken);
	}

	i = find_first_zero_bit(lun_taken, HPSA_MAX_DEVICES);
	if (i < HPSA_MAX_DEVICES) {
		/* *bus = 1; */
		*target = i;
		*lun = 0;
		found = 1;
	}
	return !found;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron12890.78%133.33%


Akinobu Mita107.09%133.33%


Scott Teel32.13%133.33%


Total141100.00%3100.00%






static void hpsa_show_dev_msg(const char *level, struct ctlr_info *h,
	struct hpsa_scsi_dev_t *dev, char *description)
{

#define LABEL_SIZE 25
	char label[LABEL_SIZE];

	if (h == NULL || h->pdev == NULL || h->scsi_host == NULL)
		return;

	switch (dev->devtype) {
	case TYPE_RAID:
		snprintf(label, LABEL_SIZE, "controller");
		break;
	case TYPE_ENCLOSURE:
		snprintf(label, LABEL_SIZE, "enclosure");
		break;
	case TYPE_DISK:
	case TYPE_ZBC:
		if (dev->external)
			snprintf(label, LABEL_SIZE, "external");
		else if (!is_logical_dev_addr_mode(dev->scsi3addr))
			snprintf(label, LABEL_SIZE, "%s",
				raid_label[PHYSICAL_DRIVE]);
		else
			snprintf(label, LABEL_SIZE, "RAID-%s",
				dev->raid_level > RAID_UNKNOWN ? "?" :
				raid_label[dev->raid_level]);
		break;
	case TYPE_ROM:
		snprintf(label, LABEL_SIZE, "rom");
		break;
	case TYPE_TAPE:
		snprintf(label, LABEL_SIZE, "tape");
		break;
	case TYPE_MEDIUM_CHANGER:
		snprintf(label, LABEL_SIZE, "changer");
		break;
	default:
		snprintf(label, LABEL_SIZE, "UNKNOWN");
		break;
	}

	dev_printk(level, &h->pdev->dev,
			"scsi %d:%d:%d:%d: %s %s %.8s %.16s %s SSDSmartPathCap%c En%c Exp=%d\n",
			h->scsi_host->host_no, dev->bus, dev->target, dev->lun,
			description,
			scsi_device_type(dev->devtype),
			dev->vendor,
			dev->model,
			label,
			dev->offload_config ? '+' : '-',
			dev->offload_enabled ? '+' : '-',
			dev->expose_device);
}


Contributors
PersonTokensPropCommitsCommitProp
Don Brace18766.55%360.00%


Webb Scales9333.10%120.00%


Kevin Barnett10.36%120.00%


Total281100.00%5100.00%



/* Add an entry into h->dev[] array. */



static int hpsa_scsi_add_entry(struct ctlr_info *h,
		struct hpsa_scsi_dev_t *device,
		struct hpsa_scsi_dev_t *added[], int *nadded)
{
	/* assumes h->devlock is held */
	int n = h->ndevices;
	int i;
	unsigned char addr1[8], addr2[8];
	struct hpsa_scsi_dev_t *sd;

	if (n >= HPSA_MAX_DEVICES) {
		dev_err(&h->pdev->dev, "too many devices, some will be "
			"inaccessible.\n");
		return -1;
	}

	/* physical devices do not have lun or target assigned until now. */
	if (device->lun != -1)
		/* Logical device, lun is already assigned. */
		goto lun_assigned;

	/* If this device a non-zero lun of a multi-lun device
         * byte 4 of the 8-byte LUN addr will contain the logical
         * unit no, zero otherwise.
         */
	if (device->scsi3addr[4] == 0) {
		/* This is not a non-zero lun of a multi-lun device */
		if (hpsa_find_target_lun(h, device->scsi3addr,
			device->bus, &device->target, &device->lun) != 0)
			return -1;
		goto lun_assigned;
	}

	/* This is a non-zero lun of a multi-lun device.
         * Search through our list and find the device which
         * has the same 8 byte LUN address, excepting byte 4 and 5.
         * Assign the same bus and target for this new LUN.
         * Use the logical unit number from the firmware.
         */
	memcpy(addr1, device->scsi3addr, 8);
	addr1[4] = 0;
	addr1[5] = 0;
	for (i = 0; i < n; i++) {
		sd = h->dev[i];
		memcpy(addr2, sd->scsi3addr, 8);
		addr2[4] = 0;
		addr2[5] = 0;
		/* differ only in byte 4 and 5? */
		if (memcmp(addr1, addr2, 8) == 0) {
			device->bus = sd->bus;
			device->target = sd->target;
			device->lun = device->scsi3addr[4];
			break;
		}
	}
	if (device->lun == -1) {
		dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
			" suspect firmware bug or unsupported hardware "
			"configuration.\n");
			return -1;
	}

lun_assigned:

	h->dev[n] = device;
	h->ndevices++;
	added[*nadded] = device;
	(*nadded)++;
	hpsa_show_dev_msg(KERN_INFO, h, device,
		device->expose_device ? "added" : "masked");
	device->offload_to_be_enabled = device->offload_enabled;
	device->offload_enabled = 0;
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron31488.70%114.29%


Shane M Seymour164.52%114.29%


Robert Elliott143.95%114.29%


Webb Scales71.98%114.29%


Don Brace10.28%114.29%


Scott Teel10.28%114.29%


Kevin Barnett10.28%114.29%


Total354100.00%7100.00%



/* Update an entry in h->dev[] array. */



static void hpsa_scsi_update_entry(struct ctlr_info *h,
	int entry, struct hpsa_scsi_dev_t *new_entry)
{
	int offload_enabled;
	/* assumes h->devlock is held */
	BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);

	/* Raid level changed. */
	h->dev[entry]->raid_level = new_entry->raid_level;

	/* Raid offload parameters changed.  Careful about the ordering. */
	if (new_entry->offload_config && new_entry->offload_enabled) {
		/*
                 * if drive is newly offload_enabled, we want to copy the
                 * raid map data first.  If previously offload_enabled and
                 * offload_config were set, raid map data had better be
                 * the same as it was before.  if raid map data is changed
                 * then it had better be the case that
                 * h->dev[entry]->offload_enabled is currently 0.
                 */
		h->dev[entry]->raid_map = new_entry->raid_map;
		h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
	}
	if (new_entry->hba_ioaccel_enabled) {
		h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
		wmb(); /* set ioaccel_handle *before* hba_ioaccel_enabled */
	}
	h->dev[entry]->hba_ioaccel_enabled = new_entry->hba_ioaccel_enabled;
	h->dev[entry]->offload_config = new_entry->offload_config;
	h->dev[entry]->offload_to_mirror = new_entry->offload_to_mirror;
	h->dev[entry]->queue_depth = new_entry->queue_depth;

	/*
         * We can turn off ioaccel offload now, but need to delay turning
         * it on until we can update h->dev[entry]->phys_disk[], but we
         * can't do that until all the devices are updated.
         */
	h->dev[entry]->offload_to_be_enabled = new_entry->offload_enabled;
	if (!new_entry->offload_enabled)
		h->dev[entry]->offload_enabled = 0;

	offload_enabled = h->dev[entry]->offload_enabled;
	h->dev[entry]->offload_enabled = h->dev[entry]->offload_to_be_enabled;
	hpsa_show_dev_msg(KERN_INFO, h, h->dev[entry], "updated");
	h->dev[entry]->offload_enabled = offload_enabled;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron7429.25%337.50%


Scott Teel5019.76%112.50%


Robert Elliott4317.00%112.50%


Joe Handzik3815.02%112.50%


Don Brace3212.65%112.50%


Webb Scales166.32%112.50%


Total253100.00%8100.00%



/* Replace an entry from h->dev[] array. */



static void hpsa_scsi_replace_entry(struct ctlr_info *h,
	int entry, struct hpsa_scsi_dev_t *new_entry,
	struct hpsa_scsi_dev_t *added[], int *nadded,
	struct hpsa_scsi_dev_t *removed[], int *nremoved)
{
	/* assumes h->devlock is held */
	BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
	removed[*nremoved] = h->dev[entry];
	(*nremoved)++;

	/*
         * New physical devices won't have target/lun assigned yet
         * so we need to preserve the values in the slot we are replacing.
         */
	if (new_entry->target == -1) {
		new_entry->target = h->dev[entry]->target;
		new_entry->lun = h->dev[entry]->lun;
	}

	h->dev[entry] = new_entry;
	added[*nadded] = new_entry;
	(*nadded)++;
	hpsa_show_dev_msg(KERN_INFO, h, new_entry, "replaced");
	new_entry->offload_to_be_enabled = new_entry->offload_enabled;
	new_entry->offload_enabled = 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron13787.82%240.00%


Robert Elliott148.97%120.00%


Webb Scales42.56%120.00%


Scott Teel10.64%120.00%


Total156100.00%5100.00%



/* Remove an entry from h->dev[] array. */



static void hpsa_scsi_remove_entry(struct ctlr_info *h, int entry,
	struct hpsa_scsi_dev_t *removed[], int *nremoved)
{
	/* assumes h->devlock is held */
	int i;
	struct hpsa_scsi_dev_t *sd;

	BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);

	sd = h->dev[entry];
	removed[*nremoved] = h->dev[entry];
	(*nremoved)++;

	for (i = entry; i < h->ndevices-1; i++)
		h->dev[i] = h->dev[i+1];
	h->ndevices--;
	hpsa_show_dev_msg(KERN_INFO, h, sd, "removed");
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron11695.87%250.00%


Webb Scales43.31%125.00%


Scott Teel10.83%125.00%


Total121100.00%4100.00%




#define SCSI3ADDR_EQ(a, b) ( \
        (a)[7] == (b)[7] && \
        (a)[6] == (b)[6] && \
        (a)[5] == (b)[5] && \
        (a)[4] == (b)[4] && \
        (a)[3] == (b)[3] && \
        (a)[2] == (b)[2] && \
        (a)[1] == (b)[1] && \
        (a)[0] == (b)[0])




static void fixup_botched_add(struct ctlr_info *h,
	struct hpsa_scsi_dev_t *added)
{
	/* called when scsi_add_device fails in order to re-adjust
         * h->dev[] to match the mid layer's view.
         */
	unsigned long flags;
	int i, j;

	spin_lock_irqsave(&h->lock, flags);
	for (i = 0; i < h->ndevices; i++) {
		if (h->dev[i] == added) {
			for (j = i; j < h->ndevices-1; j++)
				h->dev[j] = h->dev[j+1];
			h->ndevices--;
			break;
		}
	}
	spin_unlock_irqrestore(&h->lock, flags);
	kfree(added);
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron120100.00%1100.00%


Total120100.00%1100.00%






static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
	struct hpsa_scsi_dev_t *dev2)
{
	/* we compare everything except lun and target as these
         * are not yet assigned.  Compare parts likely
         * to differ first
         */
	if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
		sizeof(dev1->scsi3addr)) != 0)
		return 0;
	if (memcmp(dev1->device_id, dev2->device_id,
		sizeof(dev1->device_id)) != 0)
		return 0;
	if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
		return 0;
	if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
		return 0;
	if (dev1->devtype != dev2->devtype)
		return 0;
	if (dev1->bus != dev2->bus)
		return 0;
	return 1;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron147100.00%1100.00%


Total147100.00%1100.00%






static inline int device_updated(struct hpsa_scsi_dev_t *dev1,
	struct hpsa_scsi_dev_t *dev2)
{
	/* Device attributes that can change, but don't mean
         * that the device is a different device, nor that the OS
         * needs to be told anything about the change.
         */
	if (dev1->raid_level != dev2->raid_level)
		return 1;
	if (dev1->offload_config != dev2->offload_config)
		return 1;
	if (dev1->offload_enabled != dev2->offload_enabled)
		return 1;
	if (!is_logical_dev_addr_mode(dev1->scsi3addr))
		if (dev1->queue_depth != dev2->queue_depth)
			return 1;
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Scott Teel3440.96%125.00%


Stephen M. Cameron2631.33%125.00%


Don Brace2327.71%250.00%


Total83100.00%4100.00%



/* Find needle in haystack.  If exact match found, return DEVICE_SAME,
 * and return needle location in *index.  If scsi3addr matches, but not
 * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
 * location in *index.
 * In the case of a minor device attribute change, such as RAID level, just
 * return DEVICE_UPDATED, along with the updated device's location in index.
 * If needle not found, return DEVICE_NOT_FOUND.
 */



static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
	struct hpsa_scsi_dev_t *haystack[], int haystack_size,
	int *index)
{
	int i;

#define DEVICE_NOT_FOUND 0

#define DEVICE_CHANGED 1

#define DEVICE_SAME 2

#define DEVICE_UPDATED 3
	if (needle == NULL)
		return DEVICE_NOT_FOUND;

	for (i = 0; i < haystack_size; i++) {
		if (haystack[i] == NULL) /* previously removed. */
			continue;
		if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
			*index = i;
			if (device_is_the_same(needle, haystack[i])) {
				if (device_updated(needle, haystack[i]))
					return DEVICE_UPDATED;
				return DEVICE_SAME;
			} else {
				/* Keep offline devices offline */
				if (needle->volume_offline)
					return DEVICE_NOT_FOUND;
				return DEVICE_CHANGED;
			}
		}
	}
	*index = -1;
	return DEVICE_NOT_FOUND;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron12679.75%360.00%


Scott Teel2314.56%120.00%


Don Brace95.70%120.00%


Total158100.00%5100.00%






static void hpsa_monitor_offline_device(struct ctlr_info *h,
					unsigned char scsi3addr[])
{
	struct offline_device_entry *device;
	unsigned long flags;

	/* Check to see if device is already on the list */
	spin_lock_irqsave(&h->offline_device_lock, flags);
	list_for_each_entry(device, &h->offline_device_list, offline_list) {
		if (memcmp(device->scsi3addr, scsi3addr,
			sizeof(device->scsi3addr)) == 0) {
			spin_unlock_irqrestore(&h->offline_device_lock, flags);
			return;
		}
	}
	spin_unlock_irqrestore(&h->offline_device_lock, flags);

	/* Device is not on the list, add it. */
	device = kmalloc(sizeof(*device), GFP_KERNEL);
	if (!device)
		return;

	memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
	spin_lock_irqsave(&h->offline_device_lock, flags);
	list_add_tail(&device->offline_list, &h->offline_device_list);
	spin_unlock_irqrestore(&h->offline_device_lock, flags);
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron158100.00%3100.00%


Total158100.00%3100.00%



/* Print a message explaining various offline volume states */



static void hpsa_show_volume_status(struct ctlr_info *h,
	struct hpsa_scsi_dev_t *sd)
{
	if (sd->volume_offline == HPSA_VPD_LV_STATUS_UNSUPPORTED)
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume status is not available through vital product data pages.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
	switch (sd->volume_offline) {
	case HPSA_LV_OK:
		break;
	case HPSA_LV_UNDERGOING_ERASE:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is undergoing background erase process.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_NOT_AVAILABLE:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is waiting for transforming volume.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_UNDERGOING_RPI:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is undergoing rapid parity init.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_PENDING_RPI:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is queued for rapid parity initialization process.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_ENCRYPTED_NO_KEY:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is encrypted and cannot be accessed because key is not present.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_PLAINTEXT_IN_ENCRYPT_ONLY_CONTROLLER:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is not encrypted and cannot be accessed because controller is in encryption-only mode.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_UNDERGOING_ENCRYPTION:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is undergoing encryption process.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_UNDERGOING_ENCRYPTION_REKEYING:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is undergoing encryption re-keying process.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is encrypted and cannot be accessed because controller does not have encryption enabled.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_PENDING_ENCRYPTION:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is pending migration to encrypted state, but process has not started.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_PENDING_ENCRYPTION_REKEYING:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is encrypted and is pending encryption rekeying.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron39790.23%360.00%


Scott Benesh357.95%120.00%


Scott Teel81.82%120.00%


Total440100.00%5100.00%



/*
 * Figure the list of physical drive pointers for a logical drive with
 * raid offload configured.
 */



static void hpsa_figure_phys_disk_ptrs(struct ctlr_info *h,
				struct hpsa_scsi_dev_t *dev[], int ndevices,
				struct hpsa_scsi_dev_t *logical_drive)
{
	struct raid_map_data *map = &logical_drive->raid_map;
	struct raid_map_disk_data *dd = &map->data[0];
	int i, j;
	int total_disks_per_row = le16_to_cpu(map->data_disks_per_row) +
				le16_to_cpu(map->metadata_disks_per_row);
	int nraid_map_entries = le16_to_cpu(map->row_cnt) *
				le16_to_cpu(map->layout_map_count) *
				total_disks_per_row;
	int nphys_disk = le16_to_cpu(map->layout_map_count) *
				total_disks_per_row;
	int qdepth;

	if (nraid_map_entries > RAID_MAP_MAX_ENTRIES)
		nraid_map_entries = RAID_MAP_MAX_ENTRIES;

	logical_drive->nphysical_disks = nraid_map_entries;

	qdepth = 0;
	for (i = 0; i < nraid_map_entries; i++) {
		logical_drive->phys_disk[i] = NULL;
		if (!logical_drive->offload_config)
			continue;
		for (j = 0; j < ndevices; j++) {
			if (dev[j] == NULL)
				continue;
			if (dev[j]->devtype != TYPE_DISK &&
			    dev[j]->devtype != TYPE_ZBC)
				continue;
			if (is_logical_device(dev[j]))
				continue;
			if (dev[j]->ioaccel_handle != dd[i].ioaccel_handle)
				continue;

			logical_drive->phys_disk[i] = dev[j];
			if (i < nphys_disk)
				qdepth = min(h->nr_cmds, qdepth +
				    logical_drive->phys_disk[i]->queue_depth);
			break;
		}

		/*
                 * This can happen if a physical drive is removed and
                 * the logical drive is degraded.  In that case, the RAID
                 * map data will refer to a physical disk which isn't actually
                 * present.  And in that case offload_enabled should already
                 * be 0, but we'll turn it off here just in case
                 */
		if (!logical_drive->phys_disk[i]) {
			logical_drive->offload_enabled = 0;
			logical_drive->offload_to_be_enabled = 0;
			logical_drive->queue_depth = 8;
		}
	}
	if (nraid_map_entries)
		/*
                 * This is correct for reads, too high for full stripe writes,
                 * way too high for partial stripe writes
                 */
		logical_drive->queue_depth = qdepth;
	else
		logical_drive->queue_depth = h->nr_cmds;
}


Contributors
PersonTokensPropCommitsCommitProp
Don Brace25278.75%330.00%


Stephen M. Cameron6018.75%440.00%


Webb Scales61.88%110.00%


Kevin Barnett10.31%110.00%


Petros Koutoupis10.31%110.00%


Total320100.00%10100.00%






static void hpsa_update_log_drive_phys_drive_ptrs(struct ctlr_info *h,
				struct hpsa_scsi_dev_t *dev[], int ndevices)
{
	int i;

	for (i = 0; i < ndevices; i++) {
		if (dev[i] == NULL)
			continue;
		if (dev[i]->devtype != TYPE_DISK &&
		    dev[i]->devtype != TYPE_ZBC)
			continue;
		if (!is_logical_device(dev[i]))
			continue;

		/*
                 * If offload is currently enabled, the RAID map and
                 * phys_disk[] assignment *better* not be changing
                 * and since it isn't changing, we do not need to
                 * update it.
                 */
		if (dev[i]->offload_enabled)
			continue;

		hpsa_figure_phys_disk_ptrs(h, dev, ndevices, dev[i]);
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Don Brace9387.74%350.00%


Stephen M. Cameron1110.38%116.67%


Kevin Barnett10.94%116.67%


Petros Koutoupis10.94%116.67%


Total106100.00%6100.00%






static int hpsa_add_device(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
{
	int rc = 0;

	if (!h->scsi_host)
		return 1;

	if (is_logical_device(device)) /* RAID */
		rc = scsi_add_device(h->scsi_host, device->bus,
					device->target, device->lun);
	else /* HBA */
		rc = hpsa_add_sas_device(h->sas_host, device);

	return rc;
}


Contributors
PersonTokensPropCommitsCommitProp
Kevin Barnett76100.00%2100.00%


Total76100.00%2100.00%






static int hpsa_find_outstanding_commands_for_dev(struct ctlr_info *h,
						struct hpsa_scsi_dev_t *dev)
{
	int i;
	int count = 0;

	for (i = 0; i < h->nr_cmds; i++) {
		struct CommandList *c = h->cmd_pool + i;
		int refcount = atomic_inc_return(&c->refcount);

		if (refcount > 1 && hpsa_cmd_dev_match(h, c, dev,
				dev->scsi3addr)) {
			unsigned long flags;

			spin_lock_irqsave(&h->lock, flags);	/* Implied MB */
			if (!hpsa_is_cmd_idle(c))
				++count;
			spin_unlock_irqrestore(&h->lock, flags);
		}

		cmd_free(h, c);
	}

	return count;
}


Contributors
PersonTokensPropCommitsCommitProp
Don Brace130100.00%1100.00%


Total130100.00%1100.00%






static void hpsa_wait_for_outstanding_commands_for_dev(struct ctlr_info *h,
						struct hpsa_scsi_dev_t *device)
{
	int cmds = 0;
	int waits = 0;

	while (1) {
		cmds = hpsa_find_outstanding_commands_for_dev(h, device);
		if (cmds == 0)
			break;
		if (++waits > 20)
			break;
		dev_warn(&h->pdev->dev,
			"%s: removing device with %d outstanding commands!\n",
			__func__, cmds);
		msleep(1000);
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Don Brace77100.00%1100.00%


Total77100.00%1100.00%






static void hpsa_remove_device(struct ctlr_info *h,
			struct hpsa_scsi_dev_t *device)
{
	struct scsi_device *sdev = NULL;

	if (!h->scsi_host)
		return;

	if (is_logical_device(device)) { /* RAID */
		sdev = scsi_device_lookup(h->scsi_host, device->bus,
						device->target, device->lun);
		if (sdev) {
			scsi_remove_device(sdev);
			scsi_device_put(sdev);
		} else {
			/*
                         * We don't expect to get here.  Future commands
                         * to this device will get a selection timeout as
                         * if the device were gone.
                         */
			hpsa_show_dev_msg(KERN_WARNING, h, device,
					"didn't find device for removal.");
		}
	} else { /* HBA */

		device->removed = 1;
		hpsa_wait_for_outstanding_commands_for_dev(h, device);

		hpsa_remove_sas_device(device);
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Kevin Barnett10086.96%266.67%


Don Brace1513.04%133.33%


Total115100.00%3100.00%






static void adjust_hpsa_scsi_table(struct ctlr_info *h,
	struct hpsa_scsi_dev_t *sd[], int nsds)
{
	/* sd contains scsi3 addresses and devtypes, and inquiry
         * data.  This function takes what's in sd to be the current
         * reality and updates h->dev[] to reflect that reality.
         */
	int i, entry, device_change, changes = 0;
	struct hpsa_scsi_dev_t *csd;
	unsigned long flags;
	struct hpsa_scsi_dev_t **added, **removed;
	int nadded, nremoved;

	/*
         * A reset can cause a device status to change
         * re-schedule the scan to see what happened.
         */
	if (h->reset_in_progress) {
		h->drv_req_rescan = 1;
		return;
	}

	added = kzalloc(sizeof(*added) * HPSA_MAX_DEVICES, GFP_KERNEL);
	removed = kzalloc(sizeof(*removed) * HPSA_MAX_DEVICES, GFP_KERNEL);

	if (!added || !removed) {
		dev_warn(&h->pdev->dev, "out of memory in "
			"adjust_hpsa_scsi_table\n");
		goto free_and_out;
	}

	spin_lock_irqsave(&h->devlock, flags);

	/* find any devices in h->dev[] that are not in
         * sd[] and remove them from h->dev[], and for any
         * devices which have changed, remove the old device
         * info and add the new device info.
         * If minor device attributes change, just update
         * the existing device structure.
         */
	i = 0;
	nremoved = 0;
	nadded = 0;
	while (i < h->ndevices) {
		csd = h->dev[i];
		device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
		if (device_change == DEVICE_NOT_FOUND) {
			changes++;
			hpsa_scsi_remove_entry(h, i, removed, &nremoved);
			continue; /* remove ^^^, hence i not incremented */
		} else if (device_change == DEVICE_CHANGED) {
			changes++;
			hpsa_scsi_replace_entry(h, i, sd[entry],
				added, &nadded, removed, &nremoved);
			/* Set it to NULL to prevent it from being freed
                         * at the bottom of hpsa_update_scsi_devices()
                         */
			sd[entry] = NULL;
		} else if (device_change == DEVICE_UPDATED) {
			hpsa_scsi_update_entry(h, i, sd[entry]);
		}
		i++;
	}

	/* Now, make sure every device listed in sd[] is also
         * listed in h->dev[], adding them if they aren't found
         */

	for (i = 0; i < nsds; i++) {
		if (!sd[i]) /* if already added above. */
			continue;

		/* Don't add devices which are NOT READY, FORMAT IN PROGRESS
                 * as the SCSI mid-layer does not handle such devices well.
                 * It relentlessly loops sending TUR at 3Hz, then READ(10)
                 * at 160Hz, and prevents the system from coming up.
                 */
		if (sd[i]->volume_offline) {
			hpsa_show_volume_status(h, sd[i]);
			hpsa_show_dev_msg(KERN_INFO, h, sd[i], "offline");
			continue;
		}

		device_change = hpsa_scsi_find_entry(sd[i], h->dev,
					h->ndevices, &entry);
		if (device_change == DEVICE_NOT_FOUND) {
			changes++;
			if (hpsa_scsi_add_entry(h, sd[i], added, &nadded) != 0)
				break;
			sd[i] = NULL; /* prevent from being freed later. */
		} else if (device_change == DEVICE_CHANGED) {
			/* should never happen... */
			changes++;
			dev_warn(&h->pdev->dev,
				"device unexpectedly changed.\n");
			/* but if it does happen, we just ignore that device */
		}
	}
	hpsa_update_log_drive_phys_drive_ptrs(h, h->dev, h->ndevices);

	/* Now that h->dev[]->phys_disk[] is coherent, we can enable
         * any logical drives that need it enabled.
         */
	for (i = 0; i < h->ndevices; i++) {
		if (h->dev[i] == NULL)
			continue;
		h->dev[i]->offload_enabled = h->dev[i]->offload_to_be_enabled;
	}

	spin_unlock_irqrestore(&h->devlock, flags);

	/* Monitor devices which are in one of several NOT READY states to be
         * brought online later. This must be done without holding h->devlock,
         * so don't touch h->dev[]
         */
	for (i = 0; i < nsds; i++) {
		if (!sd[i]) /* if already added above. */
			continue;
		if (sd[i]->volume_offline)
			hpsa_monitor_offline_device(h, sd[i]->scsi3addr);
	}

	/* Don't notify scsi mid layer of any changes the first time through
         * (or if there are no changes) scsi_scan_host will do it later the
         * first time through.
         */
	if (!changes)
		goto free_and_out;

	/* Notify scsi mid layer of any removed devices */
	for (i = 0; i < nremoved; i++) {
		if (removed[i] == NULL)
			continue;
		if (removed[i]->expose_device)
			hpsa_remove_device(h, removed[i]);
		kfree(removed[i]);
		removed[i] = NULL;
	}

	/* Notify scsi mid layer of any added devices */
	for (i = 0; i < nadded; i++) {
		int rc = 0;

		if (added[i] == NULL)
			continue;
		if (!(added[i]->expose_device))
			continue;
		rc = hpsa_add_device(h, added[i]);
		if (!rc)
			continue;
		dev_warn(&h->pdev->dev,
			"addition failed %d, device not added.", rc);
		/* now we have to remove it from h->dev,
                 * since it didn't get added to scsi mid layer
                 */
		fixup_botched_add(h, added[i]);
		h->drv_req_rescan = 1;
	}

free_and_out:
	kfree(added);
	kfree(removed);
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron45964.11%633.33%


Don Brace21029.33%422.22%


Kevin Barnett192.65%211.11%


Scott Teel152.09%211.11%


Webb Scales50.70%15.56%


Matt Gates40.56%15.56%


Robert Elliott20.28%15.56%


Tomas Henzl20.28%15.56%


Total716100.00%18100.00%



/*
 * Lookup bus/target/lun and return corresponding struct hpsa_scsi_dev_t *
 * Assume's h->devlock is held.
 */



static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
	int bus, int target, int lun)
{
	int i;
	struct hpsa_scsi_dev_t *sd;

	for (i = 0; i < h->ndevices; i++) {
		sd = h->dev[i];
		if (sd->bus == bus && sd->target == target && sd->lun == lun)
			return sd;
	}
	return NULL;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron7793.90%133.33%


Matt Gates33.66%133.33%


Scott Teel22.44%133.33%


Total82100.00%3100.00%






static int hpsa_slave_alloc(struct scsi_device *sdev)
{
	struct hpsa_scsi_dev_t *sd = NULL;
	unsigned long flags;
	struct ctlr_info *h;

	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->devlock, flags);
	if (sdev_channel(sdev) == HPSA_PHYSICAL_DEVICE_BUS) {
		struct scsi_target *starget;
		struct sas_rphy *rphy;

		starget = scsi_target(sdev);
		rphy = target_to_rphy(starget);
		sd = hpsa_find_device_by_sas_rphy(h, rphy);
		if (sd) {
			sd->target = sdev_id(sdev);
			sd->lun = sdev->lun;
		}
	}
	if (!sd)
		sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
					sdev_id(sdev), sdev->lun);

	if (sd && sd->expose_device) {
		atomic_set(&sd->ioaccel_cmds_out, 0);
		sdev->hostdata = sd;
	} else
		sdev->hostdata = NULL;
	spin_unlock_irqrestore(&h->devlock, flags);
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron7239.34%225.00%


Kevin Barnett7138.80%112.50%


Scott Teel147.65%225.00%


Don Brace126.56%112.50%


Matt Gates73.83%112.50%


Hannes Reinecke73.83%112.50%


Total183100.00%8100.00%



/* configure scsi device based on internal per-device structure */



static int hpsa_slave_configure(struct scsi_device *sdev)
{
	struct hpsa_scsi_dev_t *sd;
	int queue_depth;

	sd = sdev->hostdata;
	sdev->no_uld_attach = !sd || !sd->expose_device;

	if (sd)
		queue_depth = sd->queue_depth != 0 ?
			sd->queue_depth : sdev->host->can_queue;
	else
		queue_depth = sdev->host->can_queue;

	scsi_change_queue_depth(sdev, queue_depth);

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron6785.90%240.00%


Scott Teel1012.82%240.00%


Kevin Barnett11.28%120.00%


Total78100.00%5100.00%






static void hpsa_slave_destroy(struct scsi_device *sdev)
{
	/* nothing to do. */
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron12100.00%1100.00%


Total12100.00%1100.00%






static void hpsa_free_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
{
	int i;

	if (!h->ioaccel2_cmd_sg_list)
		return;
	for (i = 0; i < h->nr_cmds; i++) {
		kfree(h->ioaccel2_cmd_sg_list[i]);
		h->ioaccel2_cmd_sg_list[i] = NULL;
	}
	kfree(h->ioaccel2_cmd_sg_list);
	h->ioaccel2_cmd_sg_list = NULL;
}


Contributors
PersonTokensPropCommitsCommitProp
Webb Scales71100.00%1100.00%


Total71100.00%1100.00%






static int hpsa_allocate_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
{
	int i;

	if (h->chainsize <= 0)
		return 0;

	h->ioaccel2_cmd_sg_list =
		kzalloc(sizeof(*h->ioaccel2_cmd_sg_list) * h->nr_cmds,
					GFP_KERNEL);
	if (!h->ioaccel2_cmd_sg_list)
		return -ENOMEM;
	for (i = 0; i < h->nr_cmds; i++) {
		h->ioaccel2_cmd_sg_list[i] =
			kmalloc(sizeof(*h->ioaccel2_cmd_sg_list[i]) *
					h->maxsgentries, GFP_KERNEL);
		if (!h->ioaccel2_cmd_sg_list[i])
			goto clean;
	}
	return 0;

clean:
	hpsa_free_ioaccel2_sg_chain_blocks(h);
	return -ENOMEM;
}


Contributors
PersonTokensPropCommitsCommitProp
Webb Scales128100.00%1100.00%


Total128100.00%1100.00%






static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
{
	int i;

	if (!h->cmd_sg_list)
		return;
	for (i = 0; i < h->nr_cmds; i++) {
		kfree(h->cmd_sg_list[i]);
		h->cmd_sg_list[i] = NULL;
	}
	kfree(h->cmd_sg_list);
	h->cmd_sg_list = NULL;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron5983.10%360.00%


Scott Teel1014.08%120.00%


Matt Gates22.82%120.00%


Total71100.00%5100.00%






static int hpsa_alloc_sg_chain_blocks(struct ctlr_info *h)
{
	int i;

	if (h->chainsize <= 0)
		return 0;

	h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
				GFP_KERNEL);
	if (!h->cmd_sg_list)
		return -ENOMEM;

	for (i = 0; i < h->nr_cmds; i++) {
		h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
						h->chainsize, GFP_KERNEL);
		if (!h->cmd_sg_list[i])
			goto clean;

	}
	return 0;

clean:
	hpsa_free_sg_chain_blocks(h);
	return -ENOMEM;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron10279.69%337.50%


Scott Teel2015.62%337.50%


Webb Scales53.91%112.50%


Robert Elliott10.78%112.50%


Total128100.00%8100.00%






static int hpsa_map_ioaccel2_sg_chain_block(struct ctlr_info *h,
	struct io_accel2_cmd *cp, struct CommandList *c)
{
	struct ioaccel2_sg_element *chain_block;
	u64 temp64;
	u32 chain_size;

	chain_block = h->ioaccel2_cmd_sg_list[c->cmdindex];
	chain_size = le32_to_cpu(cp->sg[0].length);
	temp64 = pci_map_single(h->pdev, chain_block, chain_size,
				PCI_DMA_TODEVICE);
	if (dma_mapping_error(&h->pdev->dev, temp64)) {
		/* prevent subsequent unmapping */
		cp->sg->address = 0;
		return -1;
	}
	cp->sg->address = cpu_to_le64(temp64);
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Webb Scales10994.78%150.00%


Don Brace65.22%150.00%


Total115100.00%2100.00%






static void hpsa_unmap_ioaccel2_sg_chain_block(struct ctlr_info *h,
	struct io_accel2_cmd *cp)
{
	struct ioaccel2_sg_element *chain_sg;
	u64 temp64;
	u32 chain_size;

	chain_sg = cp->sg;
	temp64 = le64_to_cpu(chain_sg->address);
	chain_size = le32_to_cpu(cp->sg[0].length);
	pci_unmap_single(h->pdev, temp64, chain_size, PCI_DMA_TODEVICE);
}


Contributors
PersonTokensPropCommitsCommitProp
Webb Scales6289.86%133.33%


Don Brace68.70%133.33%


Stephen M. Cameron11.45%133.33%


Total69100.00%3100.00%






static int hpsa_map_sg_chain_block(struct ctlr_info *h,
	struct CommandList *c)
{
	struct SGDescriptor *chain_sg, *chain_block;
	u64 temp64;
	u32 chain_len;

	chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
	chain_block = h->cmd_sg_list[c->cmdindex];
	chain_sg->Ext = cpu_to_le32(HPSA_SG_CHAIN);
	chain_len = sizeof(*chain_sg) *
		(le16_to_cpu(c->Header.SGTotal) - h->max_cmd_sg_entries);
	chain_sg->Len = cpu_to_le32(chain_len);
	temp64 = pci_map_single(h->pdev, chain_block, chain_len,
				PCI_DMA_TODEVICE);
	if (dma_mapping_error(&h->pdev->dev, temp64)) {
		/* prevent subsequent unmapping */
		chain_sg->Addr = cpu_to_le64(0);
		return -1;
	}
	chain_sg->Addr = cpu_to_le64(temp64);
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron10971.24%342.86%


Scott Teel3321.57%114.29%


Matt Gates74.58%114.29%


Don Brace31.96%114.29%


Mike Miller10.65%114.29%


Total153100.00%7100.00%






static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
	struct CommandList *c)
{
	struct SGDescriptor *chain_sg;

	if (le16_to_cpu(c->Header.SGTotal) <= h->max_cmd_sg_entries)
		return;

	chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
	pci_unmap_single(h->pdev, le64_to_cpu(chain_sg->Addr),
			le32_to_cpu(chain_sg->Len), PCI_DMA_TODEVICE);
}



Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron6689.19%480.00%


Scott Teel810.81%120.00%


Total74100.00%5100.00%



/* Decode the various types of errors on ioaccel2 path.
 * Return 1 for any error that should generate a RAID path retry.
 * Return 0 for errors that don't require a RAID path retry.
 */



static int handle_ioaccel_mode2_error(struct ctlr_info *h,
					struct CommandList *c,
					struct scsi_cmnd *cmd,
					struct io_accel2_cmd *c2,
					struct hpsa_scsi_dev_t *dev)
{
	int data_len;
	int retry = 0;
	u32 ioaccel2_resid = 0;

	switch (c2->error_data.serv_response) {
	case IOACCEL2_SERV_RESPONSE_COMPLETE:
		switch (c2->error_data.status) {
		case IOACCEL2_STATUS_SR_TASK_COMP_GOOD:
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_CHK_COND:
			cmd->result |= SAM_STAT_CHECK_CONDITION;
			if (c2->error_data.data_present !=
					IOACCEL2_SENSE_DATA_PRESENT) {
				memset(cmd->sense_buffer, 0,
					SCSI_SENSE_BUFFERSIZE);
				break;
			}
			/* copy the sense data */
			data_len = c2->error_data.sense_data_len;
			if (data_len > SCSI_SENSE_BUFFERSIZE)
				data_len = SCSI_SENSE_BUFFERSIZE;
			if (data_len > sizeof(c2->error_data.sense_data_buff))
				data_len =
					sizeof(c2->error_data.sense_data_buff);
			memcpy(cmd->sense_buffer,
				c2->error_data.sense_data_buff, data_len);
			retry = 1;
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_BUSY:
			retry = 1;
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_RES_CON:
			retry = 1;
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_SET_FULL:
			retry = 1;
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_ABORTED:
			retry = 1;
			break;
		default:
			retry = 1;
			break;
		}
		break;
	case IOACCEL2_SERV_RESPONSE_FAILURE:
		switch (c2->error_data.status) {
		case IOACCEL2_STATUS_SR_IO_ERROR:
		case IOACCEL2_STATUS_SR_IO_ABORTED:
		case IOACCEL2_STATUS_SR_OVERRUN:
			retry = 1;
			break;
		case IOACCEL2_STATUS_SR_UNDERRUN:
			cmd->result = (DID_OK << 16);		/* host byte */
			cmd->result |= (COMMAND_COMPLETE << 8);	/* msg byte */
			ioaccel2_resid = get_unaligned_le32(
						&c2->error_data.resid_cnt[0]);
			scsi_set_resid(cmd, ioaccel2_resid);
			break;
		case IOACCEL2_STATUS_SR_NO_PATH_TO_DEVICE:
		case IOACCEL2_STATUS_SR_INVALID_DEVICE:
		case IOACCEL2_STATUS_SR_IOACCEL_DISABLED:
			/*
                         * Did an HBA disk disappear? We will eventually
                         * get a state change event from the controller but
                         * in the meantime, we need to tell the OS that the
                         * HBA disk is no longer there and stop I/O
                         * from going down. This allows the potential re-insert
                         * of the disk to get the same device node.
                         */
			if (dev->physical_device && dev->expose_device) {
				cmd->result = DID_NO_CONNECT << 16;
				dev->removed = 1;
				h->drv_req_rescan = 1;
				dev_warn(&h->pdev->dev,
					"%s: device is gone!\n", __func__);
			} else
				/*
                                 * Retry by sending down the RAID path.
                                 * We will get an event from ctlr to
                                 * trigger rescan regardless.
                                 */
				retry = 1;
			break;
		default:
			retry = 1;
		}
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_COMPLETE:
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_SUCCESS:
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_REJECTED:
		retry = 1;
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_WRONG_LUN:
		break;
	default:
		retry = 1;
		break;
	}

	return retry;	/* retry on raid path? */
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron21155.53%666.67%


Joe Handzik9625.26%111.11%


Don Brace5414.21%111.11%


Scott Teel195.00%111.11%


Total380100.00%9100.00%






static void hpsa_cmd_resolve_events(struct ctlr_info *h,
		struct CommandList *c)
{
	bool do_wake = false;

	/*
         * Prevent the following race in the abort handler:
         *
         * 1. LLD is requested to abort a SCSI command
         * 2. The SCSI command completes
         * 3. The struct CommandList associated with step 2 is made available
         * 4. New I/O request to LLD to another LUN re-uses struct CommandList
         * 5. Abort handler follows scsi_cmnd->host_scribble and
         *    finds struct CommandList and tries to aborts it
         * Now we have aborted the wrong command.
         *
         * Reset c->scsi_cmd here so that the abort or reset handler will know
         * this command has completed.  Then, check to see if the handler is
         * waiting for this command, and, if so, wake it.
         */
	c->scsi_cmd = SCSI_CMD_IDLE;
	mb();	/* Declare command idle before checking for pending events. */
	if (c->abort_pending) {
		do_wake = true;
		c->abort_pending = false;
	}
	if (c->reset_pending) {
		unsigned long flags;
		struct hpsa_scsi_dev_t *dev;

		/*
                 * There appears to be a reset pending; lock the lock and
                 * reconfirm.  If so, then decrement the count of outstanding
                 * commands and wake the reset command if this is the last one.
                 */
		spin_lock_irqsave(&h->lock, flags);
		dev = c->reset_pending;		/* Re-fetch under the lock. */
		if (dev && atomic_dec_and_test(&dev->reset_cmds_out))
			do_wake = true;
		c->reset_pending = NULL;
		spin_unlock_irqrestore(&h->lock, flags);
	}

	if (do_wake)
		wake_up_all(&h->event_sync_wait_queue);
}


Contributors
PersonTokensPropCommitsCommitProp
Webb Scales129100.00%2100.00%


Total129100.00%2100.00%






static void hpsa_cmd_resolve_and_free(struct ctlr_info *h,
				      struct CommandList *c)
{
	hpsa_cmd_resolve_events(h, c);
	cmd_tagged_free(h, c);
}


Contributors
PersonTokensPropCommitsCommitProp
Webb Scales30100.00%3100.00%


Total30100.00%3100.00%






static void hpsa_cmd_free_and_done(struct ctlr_info *h,
		struct CommandList *c, struct scsi_cmnd *cmd)
{
	hpsa_cmd_resolve_and_free(h, c);
	if (cmd && cmd->scsi_done)
		cmd->scsi_done(cmd);
}


Contributors
PersonTokensPropCommitsCommitProp
Webb Scales3581.40%266.67%


Don Brace818.60%133.33%


Total43100.00%3100.00%






static void hpsa_retry_cmd(struct ctlr_info *h, struct CommandList *c)
{
	INIT_WORK(&c->work, hpsa_command_resubmit_worker);
	queue_work_on(raw_smp_processor_id(), h->resubmit_wq, &c->work);
}


Contributors
PersonTokensPropCommitsCommitProp
Webb Scales41100.00%1100.00%


Total41100.00%1100.00%






static void hpsa_set_scsi_cmd_aborted(struct scsi_cmnd *cmd)
{
	cmd->result = DID_ABORT << 16;
}


Contributors
PersonTokensPropCommitsCommitProp
Webb Scales19100.00%1100.00%


Total19100.00%1100.00%






static void hpsa_cmd_abort_and_free(struct ctlr_info *h, struct CommandList *c,
				    struct scsi_cmnd *cmd)
{
	hpsa_set_scsi_cmd_aborted(cmd);
	dev_warn(&h->pdev->dev, "CDB %16phN was aborted with status 0x%x\n",
			 c->Request.CDB, c->err_info->ScsiStatus);
	hpsa_cmd_resolve_and_free(h, c);
}


Contributors
PersonTokensPropCommitsCommitProp
Webb Scales57100.00%2100.00%


Total57100.00%2100.00%






static void process_ioaccel2_completion(struct ctlr_info *h,
		struct CommandList *c, struct scsi_cmnd *cmd,
		struct hpsa_scsi_dev_t *dev)
{
	struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];

	/* check for good status */
	if (likely(c2->error_data.serv_response == 0 &&
			c2->error_data.status == 0))
		return hpsa_cmd_free_and_done(h, c, cmd);

	/*
         * Any RAID offload error results in retry which will use
         * the normal I/O path so the controller can handle whatever's
         * wrong.
         */
	if (is_logical_device(dev) &&
		c2->error_data.serv_response ==
			IOACCEL2_SERV_RESPONSE_FAILURE) {
		if (c2->error_data.status ==
			IOACCEL2_STATUS_SR_IOACCEL_DISABLED) {
			dev->offload_enabled = 0;
			dev->offload_to_be_enabled = 0;
		}

		return hpsa_retry_cmd(h, c);
	}

	if (handle_ioaccel_mode2_error(h, c, cmd, c2, dev))
		return hpsa_retry_cmd(h, c);

	return hpsa_cmd_free_and_done(h, c, cmd);
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron8957.05%225.00%


Don Brace3321.15%337.50%


Webb Scales2113.46%112.50%


Scott Teel127.69%112.50%


Kevin Barnett10.64%112.50%


Total156100.00%8100.00%



/* Returns 0 on success, < 0 otherwise. */



static int hpsa_evaluate_tmf_status(struct ctlr_info *h,
					struct CommandList *cp)
{
	u8 tmf_status = cp->err_info->ScsiStatus;

	switch (tmf_status) {
	case CISS_TMF_COMPLETE:
		/*
                 * CISS_TMF_COMPLETE never happens, instead,
                 * ei->CommandStatus == 0 for this case.
                 */
	case CISS_TMF_SUCCESS:
		return 0;
	case CISS_TMF_INVALID_FRAME:
	case CISS_TMF_NOT_SUPPORTED:
	case CISS_TMF_FAILED:
	case CISS_TMF_WRONG_LUN:
	case CISS_TMF_OVERLAPPED_TAG:
		break;
	default:
		dev_warn(&h->pdev->dev, "Unknown TMF status: 0x%02x\n",
				tmf_status);
		break;
	}
	return -tmf_status;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron77100.00%1100.00%


Total77100.00%1100.00%






static void complete_scsi_command(struct CommandList *cp)
{
	struct scsi_cmnd *cmd;
	struct ctlr_info *h;
	struct ErrorInfo *ei;
	struct hpsa_scsi_dev_t *dev;
	struct io_accel2_cmd *c2;

	u8 sense_key;
	u8 asc;      /* additional sense code */
	u8 ascq;     /* additional sense code qualifier */
	unsigned long sense_data_size;

	ei = cp->err_info;
	cmd = cp->scsi_cmd;
	h = cp->h;

	if (!cmd->device) {
		cmd->result = DID_NO_CONNECT << 16;
		return hpsa_cmd_free_and_done(h, cp, cmd);
	}

	dev = cmd->device->hostdata;
	if (!dev) {
		cmd->result = DID_NO_CONNECT << 16;
		return hpsa_cmd_free_and_done(h, cp, cmd);
	}
	c2 = &h->ioaccel2_cmd_pool[cp->cmdindex];

	scsi_dma_unmap(cmd); /* undo the DMA mappings */
	if ((cp->cmd_type == CMD_SCSI) &&
		(le16_to_cpu(cp->Header.SGTotal) > h->max_cmd_sg_entries))
		hpsa_unmap_sg_chain_block(h, cp);

	if ((cp->cmd_type == CMD_IOACCEL2) &&
		(c2->sg[0].chain_indicator == IOACCEL2_CHAIN))
		hpsa_unmap_ioaccel2_sg_chain_block(h, c2);

	cmd->result = (DID_OK << 16); 		/* host byte */
	cmd->result |= (COMMAND_COMPLETE << 8);	/* msg byte */

	if (cp->cmd_type == CMD_IOACCEL2 || cp->cmd_type == CMD_IOACCEL1) {
		if (dev->physical_device && dev->expose_device &&
			dev->removed) {
			cmd->result = DID_NO_CONNECT << 16;
			return hpsa_cmd_free_and_done(h, cp, cmd);
		}
		if (likely(cp->phys_disk != NULL))
			atomic_dec(&cp->phys_disk->ioaccel_cmds_out);
	}

	/*
         * We check for lockup status here as it may be set for
         * CMD_SCSI, CMD_IOACCEL1 and CMD_IOACCEL2 commands by
         * fail_all_oustanding_cmds()
         */
	if (unlikely(ei->CommandStatus == CMD_CTLR_LOCKUP)) {
		/* DID_NO_CONNECT will prevent a retry */
		cmd->result = DID_NO_CONNECT << 16;
		return hpsa_cmd_free_and_done(h, cp, cmd);
	}

	if ((unlikely(hpsa_is_pending_event(cp)))) {
		if (cp->reset_pending)
			return hpsa_cmd_free_and_done(h, cp, cmd);
		if (cp->abort_pending)
			return hpsa_cmd_abort_and_free(h, cp, cmd);
	}

	if (cp->cmd_type == CMD_IOACCEL2)
		return process_ioaccel2_completion(h, cp, cmd, dev);

	scsi_set_resid(cmd, ei->ResidualCnt);
	if (ei->CommandStatus == 0)
		return hpsa_cmd_free_and_done(h, cp, cmd);

	/* For I/O accelerator commands, copy over some fields to the normal
         * CISS header used below for error handling.
         */
	if (cp->cmd_type == CMD_IOACCEL1) {
		struct io_accel1_cmd *c = &h->ioaccel_cmd_pool[cp->cmdindex];
		cp->Header.SGList = scsi_sg_count(cmd);
		cp->Header.SGTotal = cpu_to_le16(cp->Header.SGList);
		cp->Request.CDBLen = le16_to_cpu(c->io_flags) &
			IOACCEL1_IOFLAGS_CDBLEN_MASK;
		cp->Header.tag = c->tag;
		memcpy(cp->Header.LUN.LunAddrBytes, c->CISS_LUN, 8);
		memcpy(cp->Request.CDB, c->CDB, cp->Request.CDBLen);

		/* Any RAID offload error results in retry which will use
                 * the normal I/O path so the controller can handle whatever's
                 * wrong.
                 */
		if (is_logical_device(dev)) {
			if (ei->CommandStatus == CMD_IOACCEL_DISABLED)
				dev->offload_enabled = 0;
			return hpsa_retry_cmd(h, cp);
		}
	}

	/* an error has occurred */
	switch (ei->CommandStatus) {

	case CMD_TARGET_STATUS:
		cmd->result |= ei->ScsiStatus;
		/* copy the sense data */
		if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
			sense_data_size = SCSI_SENSE_BUFFERSIZE;
		else
			sense_data_size = sizeof(ei->SenseInfo);
		if (ei->SenseLen < sense_data_size)
			sense_data_size = ei->SenseLen;
		memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
		if (ei->ScsiStatus)
			decode_sense_data(ei->SenseInfo, sense_data_size,
				&sense_key, &asc, &ascq);
		if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
			if (sense_key == ABORTED_COMMAND) {
				cmd->result |= DID_SOFT_ERROR << 16;
				break;
			}
			break;
		}
		/* Problem was not a check condition
                 * Pass it up to the upper layers...
                 */
		if (ei->ScsiStatus) {
			dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
				"Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
				"Returning result: 0x%x\n",
				cp, ei->ScsiStatus,
				sense_key, asc, ascq,
				cmd->result);
		} else {  /* scsi status is zero??? How??? */
			dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
				"Returning no connection.\n", cp),

			/* Ordinarily, this case should never happen,
                         * but there is a bug in some released firmware
                         * revisions that allows it to happen if, for
                         * example, a 4100 backplane loses power and
                         * the tape drive is in it.  We assume that
                         * it's a fatal error of some kind because we
                         * can't show that it wasn't. We will make it
                         * look like selection timeout since that is
                         * the most common reason for this to occur,
                         * and it's severe enough.
                         */

			cmd->result = DID_NO_CONNECT << 16;
		}
		break;

	case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
		break;
	case CMD_DATA_OVERRUN:
		dev_warn(&h->pdev->dev,
			"CDB %16phN data overrun\n", cp->Request.CDB);
		break;
	case CMD_INVALID: {
		/* print_bytes(cp, sizeof(*cp), 1, 0);
                print_cmd(cp); */
		/* We get CMD_INVALID if you address a non-existent device
                 * instead of a selection timeout (no response).  You will
                 * see this if you yank out a drive, then try to access it.
                 * This is kind of a shame because it means that any other
                 * CMD_INVALID (e.g. driver bug) will get interpreted as a
                 * missing target. */
		cmd->result = DID_NO_CONNECT << 16;
	}
		break;
	case CMD_PROTOCOL_ERR:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "CDB %16phN : protocol error\n",
				cp->Request.CDB);
		break;
	case CMD_HARDWARE_ERR:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "CDB %16phN : hardware error\n",
			cp->Request.CDB);
		break;
	case CMD_CONNECTION_LOST:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "CDB %16phN : connection lost\n",
			cp->Request.CDB);
		break;
	case CMD_ABORTED:
		/* Return now to avoid calling scsi_done(). */
		return hpsa_cmd_abort_and_free(h, cp, cmd);
	case CMD_ABORT_FAILED:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "CDB %16phN : abort failed\n",
			cp->Request.CDB);
		break;
	case CMD_UNSOLICITED_ABORT:
		cmd->result = DID_SOFT_ERROR << 16; /* retry the command */
		dev_warn(&h->pdev->dev, "CDB %16phN : unsolicited abort\n",
			cp->Request.CDB);
		break;
	case CMD_TIMEOUT:
		cmd->result = DID_TIME_OUT << 16;
		dev_warn(&h->pdev->dev, "CDB %16phN timed out\n",
			cp->Request.CDB);
		break;
	case CMD_UNABORTABLE:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "Command unabortable\n");
		break;
	case CMD_TMF_STATUS:
		if (hpsa_evaluate_tmf_status(h, cp)) /* TMF failed? */
			cmd->result = DID_ERROR << 16;
		break;
	case CMD_IOACCEL_DISABLED:
		/* This only handles the direct pass-through case since RAID
                 * offload is handled above.  Just attempt a retry.
                 */
		cmd->result = DID_SOFT_ERROR << 16;
		dev_warn(&h->pdev->dev,
				"cp %p had HP SSD Smart Path error\n", cp);
		break;
	default:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
				cp, ei->CommandStatus);
	}

	return hpsa_cmd_free_and_done(h, cp, cmd);
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron68961.85%1144.00%


Don Brace14312.84%520.00%


Webb Scales13912.48%520.00%


Scott Teel11810.59%14.00%


Robert Elliott232.06%14.00%


Matt Bondurant10.09%14.00%


Kevin Barnett10.09%14.00%


Total1114100.00%25100.00%






static void hpsa_pci_unmap(struct pci_dev *pdev,
	struct CommandList *c, int sg_used, int data_direction)
{
	int i;

	for (i = 0; i < sg_used; i++)
		pci_unmap_single(pdev, (dma_addr_t) le64_to_cpu(c->SG[i].Addr),
				le32_to_cpu(c->SG[i].Len),
				data_direction);
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron7097.22%480.00%


Scott Teel22.78%120.00%


Total72100.00%5100.00%






static int hpsa_map_one(struct pci_dev *pdev,
		struct CommandList *cp,
		unsigned char *buf,
		size_t buflen,
		int data_direction)
{
	u64 addr64;

	if (buflen == 0 || data_direction == PCI_DMA_NONE) {
		cp->Header.SGList = 0;
		cp->Header.SGTotal = cpu_to_le16(0);
		return 0;
	}

	addr64 = pci_map_single(pdev, buf, buflen, data_direction);
	if (dma_mapping_error(&pdev->dev, addr64)) {
		/* Prevent subsequent unmap of something never mapped */
		cp->Header.SGList = 0;
		cp->Header.SGTotal = cpu_to_le16(0);
		return -1;
	}
	cp->SG[0].Addr = cpu_to_le64(addr64);
	cp->SG[0].Len = cpu_to_le32(buflen);
	cp->SG[0].Ext = cpu_to_le32(HPSA_SG_LAST); /* we are not chaining */
	cp->Header.SGList = 1;   /* no. SGs contig in this cmd */
	cp->Header.SGTotal = cpu_to_le16(1); /* total sgs in cmd list */
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron15182.97%571.43%


Scott Teel3117.03%228.57%


Total182100.00%7100.00%




#define NO_TIMEOUT ((unsigned long) -1)

#define DEFAULT_TIMEOUT 30000 
/* milliseconds */



static int hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
	struct CommandList *c, int reply_queue, unsigned long timeout_msecs)
{
	DECLARE_COMPLETION_ONSTACK(wait);

	c->waiting = &wait;
	__enqueue_cmd_and_start_io(h, c, reply_queue);
	if (timeout_msecs == NO_TIMEOUT) {
		/* TODO: get rid of this no-timeout thing */
		wait_for_completion_io(&wait);
		return IO_OK;
	}
	if (!wait_for_completion_io_timeout(&wait,
					msecs_to_jiffies(timeout_msecs))) {
		dev_warn(&h->pdev->dev, "Command timed out.\n");
		return -ETIMEDOUT;
	}
	return IO_OK;
}


Contributors
PersonTokensPropCommitsCommitProp
Webb Scales4950.52%114.29%


Stephen M. Cameron4344.33%571.43%


Scott Teel55.15%114.29%


Total97100.00%7100.00%






static int hpsa_scsi_do_simple_cmd(struct ctlr_info *h, struct CommandList *c,
				   int reply_queue, unsigned long timeout_msecs)
{
	if (unlikely(lockup_detected(h))) {
		c->err_info->CommandStatus = CMD_CTLR_LOCKUP;
		return IO_OK;
	}
	return hpsa_scsi_do_simple_cmd_core(h, c, reply_queue, timeout_msecs);
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron3560.34%571.43%


Webb Scales2237.93%114.29%


Scott Teel11.72%114.29%


Total58100.00%7100.00%






static u32 lockup_detected(struct ctlr_info *h)
{
	int cpu;
	u32 rc, *lockup_detected;

	cpu = get_cpu();
	lockup_detected = per_cpu_ptr(h->lockup_detected, cpu);
	rc = *lockup_detected;
	put_cpu();
	return rc;
}


Contributors
PersonTokensPropCommitsCommitProp
Webb Scales4595.74%133.33%


Stephen M. Cameron24.26%266.67%


Total47100.00%3100.00%




#define MAX_DRIVER_CMD_RETRIES 25



static int hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
	struct CommandList *c, int data_direction, unsigned long timeout_msecs)
{
	int backoff_time = 10, retry_count = 0;
	int rc;

	do {
		memset(c->err_info, 0, sizeof(*c->err_info));
		rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
						  timeout_msecs);
		if (rc)
			break;
		retry_count++;
		if (retry_count > 3) {
			msleep(backoff_time);
			if (backoff_time < 1000)
				backoff_time *= 2;
		}
	} while ((check_for_unit_attention(h, c) ||
			check_for_busy(h, c)) &&
			retry_count <= MAX_DRIVER_CMD_RETRIES);
	hpsa_pci_unmap(h->pdev, c, 1, data_direction);
	if (retry_count > MAX_DRIVER_CMD_RETRIES)
		rc = -EIO;
	return rc;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron9966.44%466.67%


Webb Scales3422.82%116.67%


Scott Teel1610.74%116.67%


Total149100.00%6100.00%






static void hpsa_print_cmd(struct ctlr_info *h, char *txt,
				struct CommandList *c)
{
	const u8 *cdb = c->Request.CDB;
	const u8 *lun = c->Header.LUN.LunAddrBytes;

	dev_warn(&h->pdev->dev, "%s: LUN:%8phN CDB:%16phN\n",
		 txt, lun, cdb);
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron6198.39%150.00%


Rasmus Villemoes11.61%150.00%


Total62100.00%2100.00%






static void hpsa_scsi_interpret_error(struct ctlr_info *h,
			struct CommandList *cp)
{
	const struct ErrorInfo *ei = cp->err_info;
	struct device *d = &cp->h->pdev->dev;
	u8 sense_key, asc, ascq;
	int sense_len;

	switch (ei->CommandStatus) {
	case CMD_TARGET_STATUS:
		if (ei->SenseLen > sizeof(ei->SenseInfo))
			sense_len = sizeof(ei->SenseInfo);
		else
			sense_len = ei->SenseLen;
		decode_sense_data(ei->SenseInfo, sense_len,
					&sense_key, &asc, &ascq);
		hpsa_print_cmd(h, "SCSI status", cp);
		if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION)
			dev_warn(d, "SCSI Status = 02, Sense key = 0x%02x, ASC = 0x%02x, ASCQ = 0x%02x\n",
				sense_key, asc, ascq);
		else
			dev_warn(d, "SCSI Status = 0x%02x\n", ei->ScsiStatus);
		if (ei->ScsiStatus == 0)
			dev_warn(d, "SCSI status is abnormally zero.  "
			"(probably indicates selection timeout "
			"reported incorrectly due to a known "
			"firmware bug, circa July, 2001.)\n");
		break;
	case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
		break;
	case CMD_DATA_OVERRUN:
		hpsa_print_cmd(h, "overrun condition", cp);
		break;
	case CMD_INVALID: {
		/* controller unfortunately reports SCSI passthru's
                 * to non-existent targets as invalid commands.
                 */
		hpsa_print_cmd(h, "invalid command", cp);
		dev_warn(d, "probably means device no longer present\n");
		}
		break;
	case CMD_PROTOCOL_ERR:
		hpsa_print_cmd(h, "protocol error", cp);
		break;
	case CMD_HARDWARE_ERR:
		hpsa_print_cmd(h, "hardware error", cp);
		break;
	case CMD_CONNECTION_LOST:
		hpsa_print_cmd(h, "connection lost", cp);
		break;
	case CMD_ABORTED:
		hpsa_print_cmd(h, "aborted", cp);
		break;
	case CMD_ABORT_FAILED:
		hpsa_print_cmd(h, "abort failed", cp);
		break;
	case CMD_UNSOLICITED_ABORT:
		hpsa_print_cmd(h, "unsolicited abort", cp);
		break;
	case CMD_TIMEOUT:
		hpsa_print_cmd(h, "timed out", cp);
		break;
	case CMD_UNABORTABLE:
		hpsa_print_cmd(h, "unabortable", cp);
		break;
	case CMD_CTLR_LOCKUP:
		hpsa_print_cmd(h, "controller lockup detected", cp);
		break;
	default:
		hpsa_print_cmd(h, "unknown status", cp);
		dev_warn(d, "Unknown command status %x\n",
				ei->CommandStatus);
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron33596.26%266.67%


Webb Scales133.74%133.33%


Total348100.00%3100.00%






static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
			u16 page, unsigned char *buf,
			unsigned char bufsize)
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

	c = cmd_alloc(h);

	if (fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize,
			page, scsi3addr, TYPE_CMD)) {
		rc = -1;
		goto out;
	}
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
					PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
	if (rc)
		goto out;
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
		hpsa_scsi_interpret_error(h, c);
		rc = -1;
	}
out:
	cmd_free(h, c);
	return rc;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron13692.52%250.00%


Webb Scales106.80%125.00%


Don Brace10.68%125.00%


Total147100.00%4100.00%






static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr,
	u8 reset_type, int reply_queue)
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

	c = cmd_alloc(h);


	/* fill_cmd can't fail here, no data buffer to map. */
	(void) fill_cmd(c, reset_type, h, NULL, 0, 0,
			scsi3addr, TYPE_MSG);
	rc = hpsa_scsi_do_simple_cmd(h, c, reply_queue, NO_TIMEOUT);
	if (rc) {
		dev_warn(&h->pdev->dev, "Failed to send reset command\n");
		goto out;
	}
	/* no unmap needed here because no data xfer. */

	ei = c->err_info;
	if (ei->CommandStatus != 0) {
		hpsa_scsi_interpret_error(h, c);
		rc = -1;
	}
out:
	cmd_free(h, c);
	return rc;
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen M. Cameron10876.06