[deliverable/linux.git] / drivers / block / mtip32xx / mtip32xx.h

/*
 * mtip32xx.h - Header file for the P320 SSD Block Driver
 *   Copyright (C) 2011 Micron Technology, Inc.
 *
 * Portions of this code were derived from works subjected to the
 * following copyright:
 *    Copyright (C) 2009 Integrated Device Technology, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#ifndef __MTIP32XX_H__
#define __MTIP32XX_H__

#include <linux/spinlock.h>
#include <linux/rwsem.h>
#include <linux/ata.h>
#include <linux/interrupt.h>
#include <linux/genhd.h>
#include <linux/version.h>

/* Offset of Subsystem Device ID in pci confoguration space */
#define PCI_SUBSYSTEM_DEVICEID	0x2E

/* offset of Device Control register in PCIe extended capabilites space */
#define PCIE_CONFIG_EXT_DEVICE_CONTROL_OFFSET	0x48

/* # of times to retry timed out IOs */
#define MTIP_MAX_RETRIES	5

/* Various timeout values in ms */
#define MTIP_NCQ_COMMAND_TIMEOUT_MS       5000
#define MTIP_IOCTL_COMMAND_TIMEOUT_MS     5000
#define MTIP_INTERNAL_COMMAND_TIMEOUT_MS  5000

/* check for timeouts every 500ms */
#define MTIP_TIMEOUT_CHECK_PERIOD	500

/* ftl rebuild */
#define MTIP_FTL_REBUILD_OFFSET		142
#define MTIP_FTL_REBUILD_MAGIC		0xED51
#define MTIP_FTL_REBUILD_TIMEOUT_MS	2400000

/* Macro to extract the tag bit number from a tag value. */
#define MTIP_TAG_BIT(tag)	(tag & 0x1F)

/*
 * Macro to extract the tag index from a tag value. The index
 * is used to access the correct s_active/Command Issue register based
 * on the tag value.
 */
#define MTIP_TAG_INDEX(tag)	(tag >> 5)

/*
 * Maximum number of scatter gather entries
 * a single command may have.
 */
#define MTIP_MAX_SG		128

/*
 * Maximum number of slot groups (Command Issue & s_active registers)
 * NOTE: This is the driver maximum; check dd->slot_groups for actual value.
 */
#define MTIP_MAX_SLOT_GROUPS	8

/* Internal command tag. */
#define MTIP_TAG_INTERNAL	0

/* Micron Vendor ID & P320x SSD Device ID */
#define PCI_VENDOR_ID_MICRON    0x1344
#define P320_DEVICE_ID		0x5150

/* Driver name and version strings */
#define MTIP_DRV_NAME		"mtip32xx"
#define MTIP_DRV_VERSION	"1.2.6os3"

/* Maximum number of minor device numbers per device. */
#define MTIP_MAX_MINORS		16

/* Maximum number of supported command slots. */
#define MTIP_MAX_COMMAND_SLOTS	(MTIP_MAX_SLOT_GROUPS * 32)

/*
 * Per-tag bitfield size in longs.
 * Linux bit manipulation functions
 * (i.e. test_and_set_bit, find_next_zero_bit)
 * manipulate memory in longs, so we try to make the math work.
 * take the slot groups and find the number of longs, rounding up.
 * Careful! i386 and x86_64 use different size longs!
 */
#define U32_PER_LONG	(sizeof(long) / sizeof(u32))
#define SLOTBITS_IN_LONGS ((MTIP_MAX_SLOT_GROUPS + \
					(U32_PER_LONG-1))/U32_PER_LONG)

/* BAR number used to access the HBA registers. */
#define MTIP_ABAR		5

#ifdef DEBUG
 #define dbg_printk(format, arg...)	\
	printk(pr_fmt(format), ##arg);
#else
 #define dbg_printk(format, arg...)
#endif

#define __force_bit2int (unsigned int __force)

/* below are bit numbers in 'flags' defined in mtip_port */
#define MTIP_FLAG_IC_ACTIVE_BIT			0
#define MTIP_FLAG_EH_ACTIVE_BIT			1
#define MTIP_FLAG_SVC_THD_ACTIVE_BIT		2
#define MTIP_FLAG_ISSUE_CMDS_BIT		4
#define MTIP_FLAG_REBUILD_BIT			5
#define MTIP_FLAG_SVC_THD_SHOULD_STOP_BIT	8

/* below are bit numbers in 'dd_flag' defined in driver_data */
#define MTIP_DD_FLAG_REMOVE_PENDING_BIT		1
#define MTIP_DD_FLAG_RESUME_BIT			2
#define MTIP_DD_FLAG_CLEANUP_BIT		3
#define MTIP_DD_FLAG_INIT_DONE_BIT		4

/* Register Frame Information Structure (FIS), host to device. */
struct host_to_dev_fis {
	/*
	 * FIS type.
	 * - 27h Register FIS, host to device.
	 * - 34h Register FIS, device to host.
	 * - 39h DMA Activate FIS, device to host.
	 * - 41h DMA Setup FIS, bi-directional.
	 * - 46h Data FIS, bi-directional.
	 * - 58h BIST Activate FIS, bi-directional.
	 * - 5Fh PIO Setup FIS, device to host.
	 * - A1h Set Device Bits FIS, device to host.
	 */
	unsigned char type;
	unsigned char opts;
	unsigned char command;
	unsigned char features;

	union {
		unsigned char lba_low;
		unsigned char sector;
	};
	union {
		unsigned char lba_mid;
		unsigned char cyl_low;
	};
	union {
		unsigned char lba_hi;
		unsigned char cyl_hi;
	};
	union {
		unsigned char device;
		unsigned char head;
	};

	union {
		unsigned char lba_low_ex;
		unsigned char sector_ex;
	};
	union {
		unsigned char lba_mid_ex;
		unsigned char cyl_low_ex;
	};
	union {
		unsigned char lba_hi_ex;
		unsigned char cyl_hi_ex;
	};
	unsigned char features_ex;

	unsigned char sect_count;
	unsigned char sect_cnt_ex;
	unsigned char res2;
	unsigned char control;

	unsigned int res3;
};

/* Command header structure. */
struct mtip_cmd_hdr {
	/*
	 * Command options.
	 * - Bits 31:16 Number of PRD entries.
	 * - Bits 15:8 Unused in this implementation.
	 * - Bit 7 Prefetch bit, informs the drive to prefetch PRD entries.
	 * - Bit 6 Write bit, should be set when writing data to the device.
	 * - Bit 5 Unused in this implementation.
	 * - Bits 4:0 Length of the command FIS in DWords (DWord = 4 bytes).
	 */
	unsigned int opts;
	/* This field is unsed when using NCQ. */
	union {
		unsigned int byte_count;
		unsigned int status;
	};
	/*
	 * Lower 32 bits of the command table address associated with this
	 * header. The command table addresses must be 128 byte aligned.
	 */
	unsigned int ctba;
	/*
	 * If 64 bit addressing is used this field is the upper 32 bits
	 * of the command table address associated with this command.
	 */
	unsigned int ctbau;
	/* Reserved and unused. */
	unsigned int res[4];
};

/* Command scatter gather structure (PRD). */
struct mtip_cmd_sg {
	/*
	 * Low 32 bits of the data buffer address. For P320 this
	 * address must be 8 byte aligned signified by bits 2:0 being
	 * set to 0.
	 */
	unsigned int dba;
	/*
	 * When 64 bit addressing is used this field is the upper
	 * 32 bits of the data buffer address.
	 */
	unsigned int dba_upper;
	/* Unused. */
	unsigned int reserved;
	/*
	 * Bit 31: interrupt when this data block has been transferred.
	 * Bits 30..22: reserved
	 * Bits 21..0: byte count (minus 1).  For P320 the byte count must be
	 * 8 byte aligned signified by bits 2:0 being set to 1.
	 */
	unsigned int info;
};
struct mtip_port;

/* Structure used to describe a command. */
struct mtip_cmd {

	struct mtip_cmd_hdr *command_header; /* ptr to command header entry */

	dma_addr_t command_header_dma; /* corresponding physical address */

	void *command; /* ptr to command table entry */

	dma_addr_t command_dma; /* corresponding physical address */

	void *comp_data; /* data passed to completion function comp_func() */
	/*
	 * Completion function called by the ISR upon completion of
	 * a command.
	 */
	void (*comp_func)(struct mtip_port *port,
				int tag,
				void *data,
				int status);
	/* Additional callback function that may be called by comp_func() */
	void (*async_callback)(void *data, int status);

	void *async_data; /* Addl. data passed to async_callback() */

	int scatter_ents; /* Number of scatter list entries used */

	struct scatterlist sg[MTIP_MAX_SG]; /* Scatter list entries */

	int retries; /* The number of retries left for this command. */

	int direction; /* Data transfer direction */

	unsigned long comp_time; /* command completion time, in jiffies */

	atomic_t active; /* declares if this command sent to the drive. */
};

/* Structure used to describe a port. */
struct mtip_port {
	/* Pointer back to the driver data for this port. */
	struct driver_data *dd;
	/*
	 * Used to determine if the data pointed to by the
	 * identify field is valid.
	 */
	unsigned long identify_valid;
	/* Base address of the memory mapped IO for the port. */
	void __iomem *mmio;
	/* Array of pointers to the memory mapped s_active registers. */
	void __iomem *s_active[MTIP_MAX_SLOT_GROUPS];
	/* Array of pointers to the memory mapped completed registers. */
	void __iomem *completed[MTIP_MAX_SLOT_GROUPS];
	/* Array of pointers to the memory mapped Command Issue registers. */
	void __iomem *cmd_issue[MTIP_MAX_SLOT_GROUPS];
	/*
	 * Pointer to the beginning of the command header memory as used
	 * by the driver.
	 */
	void *command_list;
	/*
	 * Pointer to the beginning of the command header memory as used
	 * by the DMA.
	 */
	dma_addr_t command_list_dma;
	/*
	 * Pointer to the beginning of the RX FIS memory as used
	 * by the driver.
	 */
	void *rxfis;
	/*
	 * Pointer to the beginning of the RX FIS memory as used
	 * by the DMA.
	 */
	dma_addr_t rxfis_dma;
	/*
	 * Pointer to the beginning of the command table memory as used
	 * by the driver.
	 */
	void *command_table;
	/*
	 * Pointer to the beginning of the command table memory as used
	 * by the DMA.
	 */
	dma_addr_t command_tbl_dma;
	/*
	 * Pointer to the beginning of the identify data memory as used
	 * by the driver.
	 */
	u16 *identify;
	/*
	 * Pointer to the beginning of the identify data memory as used
	 * by the DMA.
	 */
	dma_addr_t identify_dma;
	/*
	 * Pointer to the beginning of a sector buffer that is used
	 * by the driver when issuing internal commands.
	 */
	u16 *sector_buffer;
	/*
	 * Pointer to the beginning of a sector buffer that is used
	 * by the DMA when the driver issues internal commands.
	 */
	dma_addr_t sector_buffer_dma;
	/*
	 * Bit significant, used to determine if a command slot has
	 * been allocated. i.e. the slot is in use.  Bits are cleared
	 * when the command slot and all associated data structures
	 * are no longer needed.
	 */
	unsigned long allocated[SLOTBITS_IN_LONGS];
	/*
	 * used to queue commands when an internal command is in progress
	 * or error handling is active
	 */
	unsigned long cmds_to_issue[SLOTBITS_IN_LONGS];
	/*
	 * Array of command slots. Structure includes pointers to the
	 * command header and command table, and completion function and data
	 * pointers.
	 */
	struct mtip_cmd commands[MTIP_MAX_COMMAND_SLOTS];
	/* Used by mtip_service_thread to wait for an event */
	wait_queue_head_t svc_wait;
	/*
	 * indicates the state of the port. Also, helps the service thread
	 * to determine its action on wake up.
	 */
	unsigned long flags;
	/*
	 * Timer used to complete commands that have been active for too long.
	 */
	struct timer_list cmd_timer;
	/*
	 * Semaphore used to block threads if there are no
	 * command slots available.
	 */
	struct semaphore cmd_slot;
	/* Spinlock for working around command-issue bug. */
	spinlock_t cmd_issue_lock;
};

/*
 * Driver private data structure.
 *
 * One structure is allocated per probed device.
 */
struct driver_data {
	void __iomem *mmio; /* Base address of the HBA registers. */

	int major; /* Major device number. */

	int instance; /* Instance number. First device probed is 0, ... */

	struct gendisk *disk; /* Pointer to our gendisk structure. */

	struct pci_dev *pdev; /* Pointer to the PCI device structure. */

	struct request_queue *queue; /* Our request queue. */

	struct mtip_port *port; /* Pointer to the port data structure. */

	/* Tasklet used to process the bottom half of the ISR. */
	struct tasklet_struct tasklet;

	unsigned product_type; /* magic value declaring the product type */

	unsigned slot_groups; /* number of slot groups the product supports */

	unsigned long index; /* Index to determine the disk name */

	unsigned long dd_flag; /* NOTE: use atomic bit operations on this */

	struct task_struct *mtip_svc_handler; /* task_struct of svc thd */
};

#endif
Commit	Line	Data
88523a61 SB	1	/*
	2	* mtip32xx.h - Header file for the P320 SSD Block Driver
	3	* Copyright (C) 2011 Micron Technology, Inc.
	4	*
	5	* Portions of this code were derived from works subjected to the
	6	* following copyright:
	7	* Copyright (C) 2009 Integrated Device Technology, Inc.
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	*/
	20
	21	#ifndef __MTIP32XX_H__
	22	#define __MTIP32XX_H__
	23
	24	#include <linux/spinlock.h>
	25	#include <linux/rwsem.h>
	26	#include <linux/ata.h>
	27	#include <linux/interrupt.h>
	28	#include <linux/genhd.h>
	29	#include <linux/version.h>
	30
	31	/* Offset of Subsystem Device ID in pci confoguration space */
	32	#define PCI_SUBSYSTEM_DEVICEID 0x2E
	33
	34	/* offset of Device Control register in PCIe extended capabilites space */
	35	#define PCIE_CONFIG_EXT_DEVICE_CONTROL_OFFSET 0x48
	36
	37	/* # of times to retry timed out IOs */
	38	#define MTIP_MAX_RETRIES 5
	39
	40	/* Various timeout values in ms */
	41	#define MTIP_NCQ_COMMAND_TIMEOUT_MS 5000
	42	#define MTIP_IOCTL_COMMAND_TIMEOUT_MS 5000
	43	#define MTIP_INTERNAL_COMMAND_TIMEOUT_MS 5000
	44
	45	/* check for timeouts every 500ms */
	46	#define MTIP_TIMEOUT_CHECK_PERIOD 500
	47
	48	/* ftl rebuild */
	49	#define MTIP_FTL_REBUILD_OFFSET 142
60ec0eec	50	#define MTIP_FTL_REBUILD_MAGIC 0xED51
88523a61 SB	51	#define MTIP_FTL_REBUILD_TIMEOUT_MS 2400000
	52
	53	/* Macro to extract the tag bit number from a tag value. */
60ec0eec	54	#define MTIP_TAG_BIT(tag) (tag & 0x1F)
88523a61 SB	55
	56	/*
	57	* Macro to extract the tag index from a tag value. The index
	58	* is used to access the correct s_active/Command Issue register based
	59	* on the tag value.
	60	*/
	61	#define MTIP_TAG_INDEX(tag) (tag >> 5)
	62
	63	/*
	64	* Maximum number of scatter gather entries
	65	* a single command may have.
	66	*/
	67	#define MTIP_MAX_SG 128
	68
	69	/*
	70	* Maximum number of slot groups (Command Issue & s_active registers)
	71	* NOTE: This is the driver maximum; check dd->slot_groups for actual value.
	72	*/
	73	#define MTIP_MAX_SLOT_GROUPS 8
	74
	75	/* Internal command tag. */
	76	#define MTIP_TAG_INTERNAL 0
	77
	78	/* Micron Vendor ID & P320x SSD Device ID */
	79	#define PCI_VENDOR_ID_MICRON 0x1344
	80	#define P320_DEVICE_ID 0x5150
	81
	82	/* Driver name and version strings */
	83	#define MTIP_DRV_NAME "mtip32xx"
60ec0eec	84	#define MTIP_DRV_VERSION "1.2.6os3"
88523a61 SB	85
	86	/* Maximum number of minor device numbers per device. */
	87	#define MTIP_MAX_MINORS 16
	88
	89	/* Maximum number of supported command slots. */
	90	#define MTIP_MAX_COMMAND_SLOTS (MTIP_MAX_SLOT_GROUPS * 32)
	91
	92	/*
	93	* Per-tag bitfield size in longs.
	94	* Linux bit manipulation functions
	95	* (i.e. test_and_set_bit, find_next_zero_bit)
	96	* manipulate memory in longs, so we try to make the math work.
	97	* take the slot groups and find the number of longs, rounding up.
	98	* Careful! i386 and x86_64 use different size longs!
	99	*/
	100	#define U32_PER_LONG (sizeof(long) / sizeof(u32))
	101	#define SLOTBITS_IN_LONGS ((MTIP_MAX_SLOT_GROUPS + \
	102	(U32_PER_LONG-1))/U32_PER_LONG)
	103
	104	/* BAR number used to access the HBA registers. */
	105	#define MTIP_ABAR 5
	106
88523a61 SB	107	#ifdef DEBUG
	108	#define dbg_printk(format, arg...) \
	109	printk(pr_fmt(format), ##arg);
	110	#else
	111	#define dbg_printk(format, arg...)
	112	#endif
	113
60ec0eec AT	114	#define __force_bit2int (unsigned int __force)
	115
	116	/* below are bit numbers in 'flags' defined in mtip_port */
	117	#define MTIP_FLAG_IC_ACTIVE_BIT 0
	118	#define MTIP_FLAG_EH_ACTIVE_BIT 1
	119	#define MTIP_FLAG_SVC_THD_ACTIVE_BIT 2
	120	#define MTIP_FLAG_ISSUE_CMDS_BIT 4
62ee8c13	121	#define MTIP_FLAG_REBUILD_BIT 5
60ec0eec AT	122	#define MTIP_FLAG_SVC_THD_SHOULD_STOP_BIT 8
60ec0eec AT	123
45038367 AT	124	/* below are bit numbers in 'dd_flag' defined in driver_data */
	125	#define MTIP_DD_FLAG_REMOVE_PENDING_BIT 1
	126	#define MTIP_DD_FLAG_RESUME_BIT 2
	127	#define MTIP_DD_FLAG_CLEANUP_BIT 3
	128	#define MTIP_DD_FLAG_INIT_DONE_BIT 4
	129
88523a61 SB	130	/* Register Frame Information Structure (FIS), host to device. */
	131	struct host_to_dev_fis {
	132	/*
	133	* FIS type.
	134	* - 27h Register FIS, host to device.
	135	* - 34h Register FIS, device to host.
	136	* - 39h DMA Activate FIS, device to host.
	137	* - 41h DMA Setup FIS, bi-directional.
	138	* - 46h Data FIS, bi-directional.
	139	* - 58h BIST Activate FIS, bi-directional.
	140	* - 5Fh PIO Setup FIS, device to host.
	141	* - A1h Set Device Bits FIS, device to host.
	142	*/
	143	unsigned char type;
	144	unsigned char opts;
	145	unsigned char command;
	146	unsigned char features;
	147
	148	union {
	149	unsigned char lba_low;
	150	unsigned char sector;
	151	};
	152	union {
	153	unsigned char lba_mid;
	154	unsigned char cyl_low;
	155	};
	156	union {
	157	unsigned char lba_hi;
	158	unsigned char cyl_hi;
	159	};
	160	union {
	161	unsigned char device;
	162	unsigned char head;
	163	};
	164
	165	union {
	166	unsigned char lba_low_ex;
	167	unsigned char sector_ex;
	168	};
	169	union {
	170	unsigned char lba_mid_ex;
	171	unsigned char cyl_low_ex;
	172	};
	173	union {
	174	unsigned char lba_hi_ex;
	175	unsigned char cyl_hi_ex;
	176	};
	177	unsigned char features_ex;
	178
	179	unsigned char sect_count;
	180	unsigned char sect_cnt_ex;
	181	unsigned char res2;
	182	unsigned char control;
	183
	184	unsigned int res3;
	185	};
	186
	187	/* Command header structure. */
	188	struct mtip_cmd_hdr {
	189	/*
	190	* Command options.
	191	* - Bits 31:16 Number of PRD entries.
	192	* - Bits 15:8 Unused in this implementation.
	193	* - Bit 7 Prefetch bit, informs the drive to prefetch PRD entries.
194	* - Bit 6 Write bit, should be set when writing data to the device.
195	* - Bit 5 Unused in this implementation.
196	* - Bits 4:0 Length of the command FIS in DWords (DWord = 4 bytes).
197	*/
198	unsigned int opts;
199	/* This field is unsed when using NCQ. */
200	union {
201	unsigned int byte_count;
202	unsigned int status;
203	};
204	/*
205	* Lower 32 bits of the command table address associated with this
206	* header. The command table addresses must be 128 byte aligned.
207	*/
208	unsigned int ctba;
209	/*
210	* If 64 bit addressing is used this field is the upper 32 bits
211	* of the command table address associated with this command.
212	*/
213	unsigned int ctbau;
214	/* Reserved and unused. */
215	unsigned int res[4];
216	};
217
218	/* Command scatter gather structure (PRD). */
219	struct mtip_cmd_sg {
220	/*
221	* Low 32 bits of the data buffer address. For P320 this
222	* address must be 8 byte aligned signified by bits 2:0 being
223	* set to 0.
224	*/
225	unsigned int dba;
226	/*
227	* When 64 bit addressing is used this field is the upper
228	* 32 bits of the data buffer address.
229	*/
230	unsigned int dba_upper;
231	/* Unused. */
232	unsigned int reserved;
233	/*
234	* Bit 31: interrupt when this data block has been transferred.
235	* Bits 30..22: reserved
236	* Bits 21..0: byte count (minus 1). For P320 the byte count must be
237	* 8 byte aligned signified by bits 2:0 being set to 1.
238	*/
239	unsigned int info;
240	};
241	struct mtip_port;
242
243	/* Structure used to describe a command. */
244	struct mtip_cmd {
245
246	struct mtip_cmd_hdr command_header; / ptr to command header entry */
247
248	dma_addr_t command_header_dma; /* corresponding physical address */
249
250	void command; / ptr to command table entry */
251
252	dma_addr_t command_dma; /* corresponding physical address */
253
254	void comp_data; / data passed to completion function comp_func() */
255	/*
256	* Completion function called by the ISR upon completion of
257	* a command.
258	*/
259	void (comp_func)(struct mtip_port port,
260	int tag,
261	void *data,
262	int status);
263	/* Additional callback function that may be called by comp_func() */
264	void (async_callback)(void data, int status);
265
266	void async_data; / Addl. data passed to async_callback() */
267
268	int scatter_ents; /* Number of scatter list entries used */
269
270	struct scatterlist sg[MTIP_MAX_SG]; /* Scatter list entries */
271
272	int retries; /* The number of retries left for this command. */
273
274	int direction; /* Data transfer direction */
275
276	unsigned long comp_time; /* command completion time, in jiffies */
277
60ec0eec	278	atomic_t active; /* declares if this command sent to the drive. */
88523a61 SB	279	};
	280
	281	/* Structure used to describe a port. */
	282	struct mtip_port {
	283	/* Pointer back to the driver data for this port. */
	284	struct driver_data *dd;
	285	/*
	286	* Used to determine if the data pointed to by the
	287	* identify field is valid.
	288	*/
	289	unsigned long identify_valid;
	290	/* Base address of the memory mapped IO for the port. */
	291	void __iomem *mmio;
	292	/* Array of pointers to the memory mapped s_active registers. */
	293	void __iomem *s_active[MTIP_MAX_SLOT_GROUPS];
60ec0eec	294	/* Array of pointers to the memory mapped completed registers. */
88523a61 SB	295	void __iomem *completed[MTIP_MAX_SLOT_GROUPS];
	296	/* Array of pointers to the memory mapped Command Issue registers. */
	297	void __iomem *cmd_issue[MTIP_MAX_SLOT_GROUPS];
	298	/*
	299	* Pointer to the beginning of the command header memory as used
	300	* by the driver.
	301	*/
	302	void *command_list;
	303	/*
	304	* Pointer to the beginning of the command header memory as used
	305	* by the DMA.
	306	*/
	307	dma_addr_t command_list_dma;
	308	/*
	309	* Pointer to the beginning of the RX FIS memory as used
	310	* by the driver.
	311	*/
	312	void *rxfis;
	313	/*
	314	* Pointer to the beginning of the RX FIS memory as used
	315	* by the DMA.
	316	*/
	317	dma_addr_t rxfis_dma;
	318	/*
	319	* Pointer to the beginning of the command table memory as used
	320	* by the driver.
	321	*/
	322	void *command_table;
	323	/*
	324	* Pointer to the beginning of the command table memory as used
	325	* by the DMA.
	326	*/
	327	dma_addr_t command_tbl_dma;
	328	/*
	329	* Pointer to the beginning of the identify data memory as used
	330	* by the driver.
	331	*/
	332	u16 *identify;
	333	/*
	334	* Pointer to the beginning of the identify data memory as used
	335	* by the DMA.
	336	*/
	337	dma_addr_t identify_dma;
	338	/*
	339	* Pointer to the beginning of a sector buffer that is used
	340	* by the driver when issuing internal commands.
	341	*/
	342	u16 *sector_buffer;
	343	/*
	344	* Pointer to the beginning of a sector buffer that is used
	345	* by the DMA when the driver issues internal commands.
	346	*/
	347	dma_addr_t sector_buffer_dma;
	348	/*
	349	* Bit significant, used to determine if a command slot has
	350	* been allocated. i.e. the slot is in use. Bits are cleared
	351	* when the command slot and all associated data structures
	352	* are no longer needed.
	353	*/
	354	unsigned long allocated[SLOTBITS_IN_LONGS];
60ec0eec AT	355	/*
	356	* used to queue commands when an internal command is in progress
	357	* or error handling is active
	358	*/
	359	unsigned long cmds_to_issue[SLOTBITS_IN_LONGS];
88523a61 SB	360	/*
	361	* Array of command slots. Structure includes pointers to the
	362	* command header and command table, and completion function and data
	363	* pointers.
	364	*/
	365	struct mtip_cmd commands[MTIP_MAX_COMMAND_SLOTS];
60ec0eec AT	366	/* Used by mtip_service_thread to wait for an event */
	367	wait_queue_head_t svc_wait;
	368	/*
	369	* indicates the state of the port. Also, helps the service thread
	370	* to determine its action on wake up.
	371	*/
	372	unsigned long flags;
88523a61 SB	373	/*
	374	* Timer used to complete commands that have been active for too long.
	375	*/
	376	struct timer_list cmd_timer;
	377	/*
	378	* Semaphore used to block threads if there are no
	379	* command slots available.
	380	*/
	381	struct semaphore cmd_slot;
	382	/* Spinlock for working around command-issue bug. */
	383	spinlock_t cmd_issue_lock;
	384	};
	385
	386	/*
	387	* Driver private data structure.
	388	*
	389	* One structure is allocated per probed device.
	390	*/
	391	struct driver_data {
	392	void __iomem mmio; / Base address of the HBA registers. */
	393
	394	int major; /* Major device number. */
	395
	396	int instance; /* Instance number. First device probed is 0, ... */
	397
88523a61 SB	398	struct gendisk disk; / Pointer to our gendisk structure. */
	399
	400	struct pci_dev pdev; / Pointer to the PCI device structure. */
	401
	402	struct request_queue queue; / Our request queue. */
88523a61 SB	403
	404	struct mtip_port port; / Pointer to the port data structure. */
	405
	406	/* Tasklet used to process the bottom half of the ISR. */
	407	struct tasklet_struct tasklet;
	408
	409	unsigned product_type; /* magic value declaring the product type */
	410
	411	unsigned slot_groups; /* number of slot groups the product supports */
	412
88523a61 SB	413	unsigned long index; /* Index to determine the disk name */
88523a61 SB	414
45038367	415	unsigned long dd_flag; /* NOTE: use atomic bit operations on this */
88523a61	416
60ec0eec	417	struct task_struct mtip_svc_handler; / task_struct of svc thd */
88523a61 SB	418	};
88523a61 SB	419
88523a61	420	#endif