[net-next-2.6.git] / drivers / scsi / hpsa.h

/*
 *    Disk Array driver for HP Smart Array SAS controllers
 *    Copyright 2000, 2009 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.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *    Questions/Comments/Bugfixes to iss_storagedev@hp.com
 *
 */
#ifndef HPSA_H
#define HPSA_H

#include <scsi/scsicam.h>

#define IO_OK		0
#define IO_ERROR	1

struct ctlr_info;

struct access_method {
	void (*submit_command)(struct ctlr_info *h,
		struct CommandList *c);
	void (*set_intr_mask)(struct ctlr_info *h, unsigned long val);
	unsigned long (*fifo_full)(struct ctlr_info *h);
	bool (*intr_pending)(struct ctlr_info *h);
	unsigned long (*command_completed)(struct ctlr_info *h);
};

struct hpsa_scsi_dev_t {
	int devtype;
	int bus, target, lun;		/* as presented to the OS */
	unsigned char scsi3addr[8];	/* as presented to the HW */
#define RAID_CTLR_LUNID "\0\0\0\0\0\0\0\0"
	unsigned char device_id[16];    /* from inquiry pg. 0x83 */
	unsigned char vendor[8];        /* bytes 8-15 of inquiry data */
	unsigned char model[16];        /* bytes 16-31 of inquiry data */
	unsigned char revision[4];      /* bytes 32-35 of inquiry data */
	unsigned char raid_level;	/* from inquiry page 0xC1 */
};

struct ctlr_info {
	int	ctlr;
	char	devname[8];
	char    *product_name;
	struct pci_dev *pdev;
	u32	board_id;
	void __iomem *vaddr;
	unsigned long paddr;
	int 	nr_cmds; /* Number of commands allowed on this controller */
	struct CfgTable __iomem *cfgtable;
	int     max_sg_entries;
	int	interrupts_enabled;
	int	major;
	int 	max_commands;
	int	commands_outstanding;
	int 	max_outstanding; /* Debug */
	int	usage_count;  /* number of opens all all minor devices */
#	define PERF_MODE_INT	0
#	define DOORBELL_INT	1
#	define SIMPLE_MODE_INT	2
#	define MEMQ_MODE_INT	3
	unsigned int intr[4];
	unsigned int msix_vector;
	unsigned int msi_vector;
	struct access_method access;

	/* queue and queue Info */
	struct hlist_head reqQ;
	struct hlist_head cmpQ;
	unsigned int Qdepth;
	unsigned int maxQsinceinit;
	unsigned int maxSG;
	spinlock_t lock;
	int maxsgentries;
	u8 max_cmd_sg_entries;
	int chainsize;
	struct SGDescriptor **cmd_sg_list;

	/* pointers to command and error info pool */
	struct CommandList 	*cmd_pool;
	dma_addr_t		cmd_pool_dhandle;
	struct ErrorInfo 	*errinfo_pool;
	dma_addr_t		errinfo_pool_dhandle;
	unsigned long  		*cmd_pool_bits;
	int			nr_allocs;
	int			nr_frees;
	int			busy_initializing;
	int			busy_scanning;
	int			scan_finished;
	spinlock_t		scan_lock;
	wait_queue_head_t	scan_wait_queue;

	struct Scsi_Host *scsi_host;
	spinlock_t devlock; /* to protect hba[ctlr]->dev[];  */
	int ndevices; /* number of used elements in .dev[] array. */
#define HPSA_MAX_SCSI_DEVS_PER_HBA 256
	struct hpsa_scsi_dev_t *dev[HPSA_MAX_SCSI_DEVS_PER_HBA];
	/*
	 * Performant mode tables.
	 */
	u32 trans_support;
	u32 trans_offset;
	struct TransTable_struct *transtable;
	unsigned long transMethod;

	/*
	 * Performant mode completion buffer
	 */
	u64 *reply_pool;
	dma_addr_t reply_pool_dhandle;
	u64 *reply_pool_head;
	size_t reply_pool_size;
	unsigned char reply_pool_wraparound;
	u32 *blockFetchTable;
	unsigned char *hba_inquiry_data;
};
#define HPSA_ABORT_MSG 0
#define HPSA_DEVICE_RESET_MSG 1
#define HPSA_BUS_RESET_MSG 2
#define HPSA_HOST_RESET_MSG 3
#define HPSA_MSG_SEND_RETRY_LIMIT 10
#define HPSA_MSG_SEND_RETRY_INTERVAL_MSECS 1000

/* Maximum time in seconds driver will wait for command completions
 * when polling before giving up.
 */
#define HPSA_MAX_POLL_TIME_SECS (20)

/* During SCSI error recovery, HPSA_TUR_RETRY_LIMIT defines
 * how many times to retry TEST UNIT READY on a device
 * while waiting for it to become ready before giving up.
 * HPSA_MAX_WAIT_INTERVAL_SECS is the max wait interval
 * between sending TURs while waiting for a device
 * to become ready.
 */
#define HPSA_TUR_RETRY_LIMIT (20)
#define HPSA_MAX_WAIT_INTERVAL_SECS (30)

/* HPSA_BOARD_READY_WAIT_SECS is how long to wait for a board
 * to become ready, in seconds, before giving up on it.
 * HPSA_BOARD_READY_POLL_INTERVAL_MSECS * is how long to wait
 * between polling the board to see if it is ready, in
 * milliseconds.  HPSA_BOARD_READY_POLL_INTERVAL and
 * HPSA_BOARD_READY_ITERATIONS are derived from those.
 */
#define HPSA_BOARD_READY_WAIT_SECS (120)
#define HPSA_BOARD_READY_POLL_INTERVAL_MSECS (100)
#define HPSA_BOARD_READY_POLL_INTERVAL \
	((HPSA_BOARD_READY_POLL_INTERVAL_MSECS * HZ) / 1000)
#define HPSA_BOARD_READY_ITERATIONS \
	((HPSA_BOARD_READY_WAIT_SECS * 1000) / \
		HPSA_BOARD_READY_POLL_INTERVAL_MSECS)
#define HPSA_POST_RESET_PAUSE_MSECS (3000)
#define HPSA_POST_RESET_NOOP_RETRIES (12)

/*  Defining the diffent access_menthods */
/*
 * Memory mapped FIFO interface (SMART 53xx cards)
 */
#define SA5_DOORBELL	0x20
#define SA5_REQUEST_PORT_OFFSET	0x40
#define SA5_REPLY_INTR_MASK_OFFSET	0x34
#define SA5_REPLY_PORT_OFFSET		0x44
#define SA5_INTR_STATUS		0x30
#define SA5_SCRATCHPAD_OFFSET	0xB0

#define SA5_CTCFG_OFFSET	0xB4
#define SA5_CTMEM_OFFSET	0xB8

#define SA5_INTR_OFF		0x08
#define SA5B_INTR_OFF		0x04
#define SA5_INTR_PENDING	0x08
#define SA5B_INTR_PENDING	0x04
#define FIFO_EMPTY		0xffffffff
#define HPSA_FIRMWARE_READY	0xffff0000 /* value in scratchpad register */

#define HPSA_ERROR_BIT		0x02

/* Performant mode flags */
#define SA5_PERF_INTR_PENDING   0x04
#define SA5_PERF_INTR_OFF       0x05
#define SA5_OUTDB_STATUS_PERF_BIT       0x01
#define SA5_OUTDB_CLEAR_PERF_BIT        0x01
#define SA5_OUTDB_CLEAR         0xA0
#define SA5_OUTDB_CLEAR_PERF_BIT        0x01
#define SA5_OUTDB_STATUS        0x9C


#define HPSA_INTR_ON 	1
#define HPSA_INTR_OFF	0
/*
	Send the command to the hardware
*/
static void SA5_submit_command(struct ctlr_info *h,
	struct CommandList *c)
{
	dev_dbg(&h->pdev->dev, "Sending %x, tag = %x\n", c->busaddr,
		c->Header.Tag.lower);
	writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
	h->commands_outstanding++;
	if (h->commands_outstanding > h->max_outstanding)
		h->max_outstanding = h->commands_outstanding;
}

/*
 *  This card is the opposite of the other cards.
 *   0 turns interrupts on...
 *   0x08 turns them off...
 */
static void SA5_intr_mask(struct ctlr_info *h, unsigned long val)
{
	if (val) { /* Turn interrupts on */
		h->interrupts_enabled = 1;
		writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
	} else { /* Turn them off */
		h->interrupts_enabled = 0;
		writel(SA5_INTR_OFF,
			h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
	}
}

static void SA5_performant_intr_mask(struct ctlr_info *h, unsigned long val)
{
	if (val) { /* turn on interrupts */
		h->interrupts_enabled = 1;
		writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
	} else {
		h->interrupts_enabled = 0;
		writel(SA5_PERF_INTR_OFF,
			h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
	}
}

static unsigned long SA5_performant_completed(struct ctlr_info *h)
{
	unsigned long register_value = FIFO_EMPTY;

	/* flush the controller write of the reply queue by reading
	 * outbound doorbell status register.
	 */
	register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
	/* msi auto clears the interrupt pending bit. */
	if (!(h->msi_vector || h->msix_vector)) {
		writel(SA5_OUTDB_CLEAR_PERF_BIT, h->vaddr + SA5_OUTDB_CLEAR);
		/* Do a read in order to flush the write to the controller
		 * (as per spec.)
		 */
		register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
	}

	if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
		register_value = *(h->reply_pool_head);
		(h->reply_pool_head)++;
		h->commands_outstanding--;
	} else {
		register_value = FIFO_EMPTY;
	}
	/* Check for wraparound */
	if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
		h->reply_pool_head = h->reply_pool;
		h->reply_pool_wraparound ^= 1;
	}

	return register_value;
}

/*
 *  Returns true if fifo is full.
 *
 */
static unsigned long SA5_fifo_full(struct ctlr_info *h)
{
	if (h->commands_outstanding >= h->max_commands)
		return 1;
	else
		return 0;

}
/*
 *   returns value read from hardware.
 *     returns FIFO_EMPTY if there is nothing to read
 */
static unsigned long SA5_completed(struct ctlr_info *h)
{
	unsigned long register_value
		= readl(h->vaddr + SA5_REPLY_PORT_OFFSET);

	if (register_value != FIFO_EMPTY)
		h->commands_outstanding--;

#ifdef HPSA_DEBUG
	if (register_value != FIFO_EMPTY)
		dev_dbg(&h->pdev->dev, "Read %lx back from board\n",
			register_value);
	else
		dev_dbg(&h->pdev->dev, "hpsa: FIFO Empty read\n");
#endif

	return register_value;
}
/*
 *	Returns true if an interrupt is pending..
 */
static bool SA5_intr_pending(struct ctlr_info *h)
{
	unsigned long register_value  =
		readl(h->vaddr + SA5_INTR_STATUS);
	dev_dbg(&h->pdev->dev, "intr_pending %lx\n", register_value);
	return register_value & SA5_INTR_PENDING;
}

static bool SA5_performant_intr_pending(struct ctlr_info *h)
{
	unsigned long register_value = readl(h->vaddr + SA5_INTR_STATUS);

	if (!register_value)
		return false;

	if (h->msi_vector || h->msix_vector)
		return true;

	/* Read outbound doorbell to flush */
	register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
	return register_value & SA5_OUTDB_STATUS_PERF_BIT;
}

static struct access_method SA5_access = {
	SA5_submit_command,
	SA5_intr_mask,
	SA5_fifo_full,
	SA5_intr_pending,
	SA5_completed,
};

static struct access_method SA5_performant_access = {
	SA5_submit_command,
	SA5_performant_intr_mask,
	SA5_fifo_full,
	SA5_performant_intr_pending,
	SA5_performant_completed,
};

struct board_type {
	u32	board_id;
	char	*product_name;
	struct access_method *access;
};

#endif /* HPSA_H */
Commit	Line	Data
edd16368 SC	1	/*
	2	* Disk Array driver for HP Smart Array SAS controllers
	3	* Copyright 2000, 2009 Hewlett-Packard Development Company, L.P.
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; version 2 of the License.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
	12	* NON INFRINGEMENT. See the GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	17	*
	18	* Questions/Comments/Bugfixes to iss_storagedev@hp.com
	19	*
	20	*/
	21	#ifndef HPSA_H
	22	#define HPSA_H
	23
	24	#include <scsi/scsicam.h>
	25
	26	#define IO_OK 0
	27	#define IO_ERROR 1
	28
	29	struct ctlr_info;
	30
	31	struct access_method {
	32	void (submit_command)(struct ctlr_info h,
	33	struct CommandList *c);
	34	void (set_intr_mask)(struct ctlr_info h, unsigned long val);
	35	unsigned long (fifo_full)(struct ctlr_info h);
900c5440	36	bool (intr_pending)(struct ctlr_info h);
edd16368 SC	37	unsigned long (command_completed)(struct ctlr_info h);
	38	};
	39
	40	struct hpsa_scsi_dev_t {
	41	int devtype;
	42	int bus, target, lun; /* as presented to the OS */
	43	unsigned char scsi3addr[8]; /* as presented to the HW */
	44	#define RAID_CTLR_LUNID "\0\0\0\0\0\0\0\0"
	45	unsigned char device_id[16]; /* from inquiry pg. 0x83 */
	46	unsigned char vendor[8]; /* bytes 8-15 of inquiry data */
	47	unsigned char model[16]; /* bytes 16-31 of inquiry data */
	48	unsigned char revision[4]; /* bytes 32-35 of inquiry data */
	49	unsigned char raid_level; /* from inquiry page 0xC1 */
	50	};
	51
	52	struct ctlr_info {
	53	int ctlr;
	54	char devname[8];
	55	char *product_name;
edd16368	56	struct pci_dev *pdev;
01a02ffc	57	u32 board_id;
edd16368 SC	58	void __iomem *vaddr;
	59	unsigned long paddr;
	60	int nr_cmds; /* Number of commands allowed on this controller */
	61	struct CfgTable __iomem *cfgtable;
303932fd	62	int max_sg_entries;
edd16368 SC	63	int interrupts_enabled;
	64	int major;
	65	int max_commands;
	66	int commands_outstanding;
	67	int max_outstanding; /* Debug */
	68	int usage_count; /* number of opens all all minor devices */
303932fd DB	69	# define PERF_MODE_INT 0
303932fd DB	70	# define DOORBELL_INT 1
edd16368 SC	71	# define SIMPLE_MODE_INT 2
	72	# define MEMQ_MODE_INT 3
	73	unsigned int intr[4];
	74	unsigned int msix_vector;
	75	unsigned int msi_vector;
	76	struct access_method access;
	77
	78	/* queue and queue Info */
	79	struct hlist_head reqQ;
	80	struct hlist_head cmpQ;
	81	unsigned int Qdepth;
	82	unsigned int maxQsinceinit;
	83	unsigned int maxSG;
	84	spinlock_t lock;
33a2ffce SC	85	int maxsgentries;
	86	u8 max_cmd_sg_entries;
	87	int chainsize;
	88	struct SGDescriptor **cmd_sg_list;
edd16368 SC	89
	90	/* pointers to command and error info pool */
	91	struct CommandList *cmd_pool;
	92	dma_addr_t cmd_pool_dhandle;
	93	struct ErrorInfo *errinfo_pool;
	94	dma_addr_t errinfo_pool_dhandle;
	95	unsigned long *cmd_pool_bits;
	96	int nr_allocs;
	97	int nr_frees;
	98	int busy_initializing;
	99	int busy_scanning;
a08a8471 SC	100	int scan_finished;
	101	spinlock_t scan_lock;
	102	wait_queue_head_t scan_wait_queue;
edd16368 SC	103
	104	struct Scsi_Host *scsi_host;
	105	spinlock_t devlock; /* to protect hba[ctlr]->dev[]; */
	106	int ndevices; /* number of used elements in .dev[] array. */
	107	#define HPSA_MAX_SCSI_DEVS_PER_HBA 256
	108	struct hpsa_scsi_dev_t *dev[HPSA_MAX_SCSI_DEVS_PER_HBA];
303932fd DB	109	/*
	110	* Performant mode tables.
	111	*/
	112	u32 trans_support;
	113	u32 trans_offset;
	114	struct TransTable_struct *transtable;
	115	unsigned long transMethod;
	116
	117	/*
	118	* Performant mode completion buffer
	119	*/
	120	u64 *reply_pool;
	121	dma_addr_t reply_pool_dhandle;
	122	u64 *reply_pool_head;
	123	size_t reply_pool_size;
	124	unsigned char reply_pool_wraparound;
	125	u32 *blockFetchTable;
339b2b14	126	unsigned char *hba_inquiry_data;
edd16368 SC	127	};
	128	#define HPSA_ABORT_MSG 0
	129	#define HPSA_DEVICE_RESET_MSG 1
	130	#define HPSA_BUS_RESET_MSG 2
	131	#define HPSA_HOST_RESET_MSG 3
	132	#define HPSA_MSG_SEND_RETRY_LIMIT 10
	133	#define HPSA_MSG_SEND_RETRY_INTERVAL_MSECS 1000
	134
	135	/* Maximum time in seconds driver will wait for command completions
	136	* when polling before giving up.
	137	*/
	138	#define HPSA_MAX_POLL_TIME_SECS (20)
	139
	140	/* During SCSI error recovery, HPSA_TUR_RETRY_LIMIT defines
	141	* how many times to retry TEST UNIT READY on a device
	142	* while waiting for it to become ready before giving up.
	143	* HPSA_MAX_WAIT_INTERVAL_SECS is the max wait interval
	144	* between sending TURs while waiting for a device
	145	* to become ready.
	146	*/
	147	#define HPSA_TUR_RETRY_LIMIT (20)
	148	#define HPSA_MAX_WAIT_INTERVAL_SECS (30)
	149
	150	/* HPSA_BOARD_READY_WAIT_SECS is how long to wait for a board
	151	* to become ready, in seconds, before giving up on it.
	152	* HPSA_BOARD_READY_POLL_INTERVAL_MSECS * is how long to wait
	153	* between polling the board to see if it is ready, in
	154	* milliseconds. HPSA_BOARD_READY_POLL_INTERVAL and
	155	* HPSA_BOARD_READY_ITERATIONS are derived from those.
	156	*/
	157	#define HPSA_BOARD_READY_WAIT_SECS (120)
	158	#define HPSA_BOARD_READY_POLL_INTERVAL_MSECS (100)
	159	#define HPSA_BOARD_READY_POLL_INTERVAL \
	160	((HPSA_BOARD_READY_POLL_INTERVAL_MSECS * HZ) / 1000)
	161	#define HPSA_BOARD_READY_ITERATIONS \
	162	((HPSA_BOARD_READY_WAIT_SECS * 1000) / \
	163	HPSA_BOARD_READY_POLL_INTERVAL_MSECS)
	164	#define HPSA_POST_RESET_PAUSE_MSECS (3000)
	165	#define HPSA_POST_RESET_NOOP_RETRIES (12)
	166
	167	/* Defining the diffent access_menthods */
	168	/*
	169	* Memory mapped FIFO interface (SMART 53xx cards)
	170	*/
	171	#define SA5_DOORBELL 0x20
	172	#define SA5_REQUEST_PORT_OFFSET 0x40
	173	#define SA5_REPLY_INTR_MASK_OFFSET 0x34
	174	#define SA5_REPLY_PORT_OFFSET 0x44
	175	#define SA5_INTR_STATUS 0x30
	176	#define SA5_SCRATCHPAD_OFFSET 0xB0
	177
	178	#define SA5_CTCFG_OFFSET 0xB4
	179	#define SA5_CTMEM_OFFSET 0xB8
	180
	181	#define SA5_INTR_OFF 0x08
	182	#define SA5B_INTR_OFF 0x04
	183	#define SA5_INTR_PENDING 0x08
	184	#define SA5B_INTR_PENDING 0x04
	185	#define FIFO_EMPTY 0xffffffff
	186	#define HPSA_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */
	187
	188	#define HPSA_ERROR_BIT 0x02
edd16368	189
303932fd DB	190	/* Performant mode flags */
	191	#define SA5_PERF_INTR_PENDING 0x04
	192	#define SA5_PERF_INTR_OFF 0x05
	193	#define SA5_OUTDB_STATUS_PERF_BIT 0x01
	194	#define SA5_OUTDB_CLEAR_PERF_BIT 0x01
	195	#define SA5_OUTDB_CLEAR 0xA0
	196	#define SA5_OUTDB_CLEAR_PERF_BIT 0x01
	197	#define SA5_OUTDB_STATUS 0x9C
	198
	199
edd16368 SC	200	#define HPSA_INTR_ON 1
	201	#define HPSA_INTR_OFF 0
	202	/*
	203	Send the command to the hardware
	204	*/
	205	static void SA5_submit_command(struct ctlr_info *h,
	206	struct CommandList *c)
	207	{
303932fd DB	208	dev_dbg(&h->pdev->dev, "Sending %x, tag = %x\n", c->busaddr,
303932fd DB	209	c->Header.Tag.lower);
edd16368 SC	210	writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
	211	h->commands_outstanding++;
	212	if (h->commands_outstanding > h->max_outstanding)
	213	h->max_outstanding = h->commands_outstanding;
	214	}
	215
	216	/*
	217	* This card is the opposite of the other cards.
	218	* 0 turns interrupts on...
	219	* 0x08 turns them off...
	220	*/
	221	static void SA5_intr_mask(struct ctlr_info *h, unsigned long val)
	222	{
	223	if (val) { /* Turn interrupts on */
	224	h->interrupts_enabled = 1;
	225	writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
	226	} else { /* Turn them off */
	227	h->interrupts_enabled = 0;
	228	writel(SA5_INTR_OFF,
	229	h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
	230	}
	231	}
303932fd DB	232
	233	static void SA5_performant_intr_mask(struct ctlr_info *h, unsigned long val)
	234	{
	235	if (val) { /* turn on interrupts */
	236	h->interrupts_enabled = 1;
	237	writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
	238	} else {
	239	h->interrupts_enabled = 0;
	240	writel(SA5_PERF_INTR_OFF,
	241	h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
	242	}
	243	}
	244
	245	static unsigned long SA5_performant_completed(struct ctlr_info *h)
	246	{
	247	unsigned long register_value = FIFO_EMPTY;
	248
	249	/* flush the controller write of the reply queue by reading
	250	* outbound doorbell status register.
	251	*/
	252	register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
	253	/* msi auto clears the interrupt pending bit. */
	254	if (!(h->msi_vector \|\| h->msix_vector)) {
	255	writel(SA5_OUTDB_CLEAR_PERF_BIT, h->vaddr + SA5_OUTDB_CLEAR);
	256	/* Do a read in order to flush the write to the controller
	257	* (as per spec.)
	258	*/
	259	register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
	260	}
	261
	262	if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
	263	register_value = *(h->reply_pool_head);
	264	(h->reply_pool_head)++;
	265	h->commands_outstanding--;
	266	} else {
	267	register_value = FIFO_EMPTY;
	268	}
	269	/* Check for wraparound */
	270	if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
	271	h->reply_pool_head = h->reply_pool;
	272	h->reply_pool_wraparound ^= 1;
	273	}
	274
	275	return register_value;
	276	}
	277
edd16368 SC	278	/*
	279	* Returns true if fifo is full.
	280	*
	281	*/
	282	static unsigned long SA5_fifo_full(struct ctlr_info *h)
	283	{
	284	if (h->commands_outstanding >= h->max_commands)
	285	return 1;
	286	else
	287	return 0;
	288
	289	}
	290	/*
	291	* returns value read from hardware.
	292	* returns FIFO_EMPTY if there is nothing to read
	293	*/
	294	static unsigned long SA5_completed(struct ctlr_info *h)
	295	{
	296	unsigned long register_value
	297	= readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
	298
	299	if (register_value != FIFO_EMPTY)
	300	h->commands_outstanding--;
	301
	302	#ifdef HPSA_DEBUG
	303	if (register_value != FIFO_EMPTY)
84ca0be2	304	dev_dbg(&h->pdev->dev, "Read %lx back from board\n",
edd16368 SC	305	register_value);
edd16368 SC	306	else
84ca0be2	307	dev_dbg(&h->pdev->dev, "hpsa: FIFO Empty read\n");
edd16368 SC	308	#endif
	309
	310	return register_value;
	311	}
	312	/*
	313	* Returns true if an interrupt is pending..
	314	*/
900c5440	315	static bool SA5_intr_pending(struct ctlr_info *h)
edd16368 SC	316	{
	317	unsigned long register_value =
	318	readl(h->vaddr + SA5_INTR_STATUS);
84ca0be2	319	dev_dbg(&h->pdev->dev, "intr_pending %lx\n", register_value);
900c5440	320	return register_value & SA5_INTR_PENDING;
edd16368 SC	321	}
edd16368 SC	322
303932fd DB	323	static bool SA5_performant_intr_pending(struct ctlr_info *h)
	324	{
	325	unsigned long register_value = readl(h->vaddr + SA5_INTR_STATUS);
	326
	327	if (!register_value)
	328	return false;
	329
	330	if (h->msi_vector \|\| h->msix_vector)
	331	return true;
	332
	333	/* Read outbound doorbell to flush */
	334	register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
	335	return register_value & SA5_OUTDB_STATUS_PERF_BIT;
	336	}
edd16368 SC	337
	338	static struct access_method SA5_access = {
	339	SA5_submit_command,
	340	SA5_intr_mask,
	341	SA5_fifo_full,
	342	SA5_intr_pending,
	343	SA5_completed,
	344	};
	345
303932fd DB	346	static struct access_method SA5_performant_access = {
	347	SA5_submit_command,
	348	SA5_performant_intr_mask,
	349	SA5_fifo_full,
	350	SA5_performant_intr_pending,
	351	SA5_performant_completed,
	352	};
	353
edd16368	354	struct board_type {
01a02ffc	355	u32 board_id;
edd16368 SC	356	char *product_name;
	357	struct access_method *access;
	358	};
	359
edd16368 SC	360	#endif /* HPSA_H */
edd16368 SC	361