Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-05 11:32:04 +00:00
Code Issues Packages Projects Releases Wiki Activity
49799fee82
linux/drivers/scsi/sym53c8xx_2/sym_hipd.h
Aaro Koskinen 49799fee82 [SCSI] sym53c8xx: Keep transfer negotiations valid 
(The patch updated based on testing and comments from Tony Battersby.)

Change the sym53c8xx_2 driver negotiation logic so that the driver will
tolerate better device removals. Negotiation message(s) will be sent
with every INQUIRY and REQUEST SENSE command, and whenever there is a
change in goals or when the device reports check condition.

The patch was made specifically to address the case where you hotswap
the disk using remove-single-device/add-single-device commands through
/proc/scsi/scsi. Without the patch the driver keeps using old transfer
parameters even though the target is reset and reports check condition,
so the data transfer of the very first INQUIRY will fail.

Signed-off-by: Aaro Koskinen <Aaro.Koskinen@nokia.com>
Tested-by: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-03-12 12:57:57 -05:00

1222 lines
33 KiB
C
Raw Blame History

/*
* Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
* of PCI-SCSI IO processors.
*
* Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
*
* This driver is derived from the Linux sym53c8xx driver.
* Copyright (C) 1998-2000 Gerard Roudier
*
* The sym53c8xx driver is derived from the ncr53c8xx driver that had been
* a port of the FreeBSD ncr driver to Linux-1.2.13.
*
* The original ncr driver has been written for 386bsd and FreeBSD by
* Wolfgang Stanglmeier <wolf@cologne.de>
* Stefan Esser <se@mi.Uni-Koeln.de>
* Copyright (C) 1994 Wolfgang Stanglmeier
*
* Other major contributions:
*
* NVRAM detection and reading.
* Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
*
*-----------------------------------------------------------------------------
*
* 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.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/gfp.h>
#ifndef SYM_HIPD_H
#define SYM_HIPD_H
/*
* Generic driver options.
*
* They may be defined in platform specific headers, if they
* are useful.
*
* SYM_OPT_HANDLE_DEVICE_QUEUEING
* When this option is set, the driver will use a queue per
* device and handle QUEUE FULL status requeuing internally.
*
* SYM_OPT_LIMIT_COMMAND_REORDERING
* When this option is set, the driver tries to limit tagged
* command reordering to some reasonnable value.
* (set for Linux)
*/
#if 0
#define SYM_OPT_HANDLE_DEVICE_QUEUEING
#define SYM_OPT_LIMIT_COMMAND_REORDERING
#endif
/*
* Active debugging tags and verbosity.
* Both DEBUG_FLAGS and sym_verbose can be redefined
* by the platform specific code to something else.
*/
#define DEBUG_ALLOC (0x0001)
#define DEBUG_PHASE (0x0002)
#define DEBUG_POLL (0x0004)
#define DEBUG_QUEUE (0x0008)
#define DEBUG_RESULT (0x0010)
#define DEBUG_SCATTER (0x0020)
#define DEBUG_SCRIPT (0x0040)
#define DEBUG_TINY (0x0080)
#define DEBUG_TIMING (0x0100)
#define DEBUG_NEGO (0x0200)
#define DEBUG_TAGS (0x0400)
#define DEBUG_POINTER (0x0800)
#ifndef DEBUG_FLAGS
#define DEBUG_FLAGS (0x0000)
#endif
#ifndef sym_verbose
#define sym_verbose (np->verbose)
#endif
/*
* These ones should have been already defined.
*/
#ifndef assert
#define assert(expression) { \
if (!(expression)) { \
(void)panic( \
"assertion \"%s\" failed: file \"%s\", line %d\n", \
#expression, \
__FILE__, __LINE__); \
} \
}
#endif
/*
* Number of tasks per device we want to handle.
*/
#if SYM_CONF_MAX_TAG_ORDER > 8
#error "more than 256 tags per logical unit not allowed."
#endif
#define SYM_CONF_MAX_TASK (1<<SYM_CONF_MAX_TAG_ORDER)
/*
* Donnot use more tasks that we can handle.
*/
#ifndef SYM_CONF_MAX_TAG
#define SYM_CONF_MAX_TAG SYM_CONF_MAX_TASK
#endif
#if SYM_CONF_MAX_TAG > SYM_CONF_MAX_TASK
#undef SYM_CONF_MAX_TAG
#define SYM_CONF_MAX_TAG SYM_CONF_MAX_TASK
#endif
/*
* This one means 'NO TAG for this job'
*/
#define NO_TAG (256)
/*
* Number of SCSI targets.
*/
#if SYM_CONF_MAX_TARGET > 16
#error "more than 16 targets not allowed."
#endif
/*
* Number of logical units per target.
*/
#if SYM_CONF_MAX_LUN > 64
#error "more than 64 logical units per target not allowed."
#endif
/*
* Asynchronous pre-scaler (ns). Shall be 40 for
* the SCSI timings to be compliant.
*/
#define SYM_CONF_MIN_ASYNC (40)
/*
* MEMORY ALLOCATOR.
*/
#define SYM_MEM_WARN 1 /* Warn on failed operations */
#define SYM_MEM_PAGE_ORDER 0 /* 1 PAGE maximum */
#define SYM_MEM_CLUSTER_SHIFT (PAGE_SHIFT+SYM_MEM_PAGE_ORDER)
#define SYM_MEM_FREE_UNUSED /* Free unused pages immediately */
/*
* Shortest memory chunk is (1<<SYM_MEM_SHIFT), currently 16.
* Actual allocations happen as SYM_MEM_CLUSTER_SIZE sized.
* (1 PAGE at a time is just fine).
*/
#define SYM_MEM_SHIFT 4
#define SYM_MEM_CLUSTER_SIZE (1UL << SYM_MEM_CLUSTER_SHIFT)
#define SYM_MEM_CLUSTER_MASK (SYM_MEM_CLUSTER_SIZE-1)
/*
* Number of entries in the START and DONE queues.
*
* We limit to 1 PAGE in order to succeed allocation of
* these queues. Each entry is 8 bytes long (2 DWORDS).
*/
#ifdef SYM_CONF_MAX_START
#define SYM_CONF_MAX_QUEUE (SYM_CONF_MAX_START+2)
#else
#define SYM_CONF_MAX_QUEUE (7*SYM_CONF_MAX_TASK+2)
#define SYM_CONF_MAX_START (SYM_CONF_MAX_QUEUE-2)
#endif
#if SYM_CONF_MAX_QUEUE > SYM_MEM_CLUSTER_SIZE/8
#undef SYM_CONF_MAX_QUEUE
#define SYM_CONF_MAX_QUEUE (SYM_MEM_CLUSTER_SIZE/8)
#undef SYM_CONF_MAX_START
#define SYM_CONF_MAX_START (SYM_CONF_MAX_QUEUE-2)
#endif
/*
* For this one, we want a short name :-)
*/
#define MAX_QUEUE SYM_CONF_MAX_QUEUE
/*
* Common definitions for both bus space based and legacy IO methods.
*/
#define INB_OFF(np, o) ioread8(np->s.ioaddr + (o))
#define INW_OFF(np, o) ioread16(np->s.ioaddr + (o))
#define INL_OFF(np, o) ioread32(np->s.ioaddr + (o))
#define OUTB_OFF(np, o, val) iowrite8((val), np->s.ioaddr + (o))
#define OUTW_OFF(np, o, val) iowrite16((val), np->s.ioaddr + (o))
#define OUTL_OFF(np, o, val) iowrite32((val), np->s.ioaddr + (o))
#define INB(np, r) INB_OFF(np, offsetof(struct sym_reg, r))
#define INW(np, r) INW_OFF(np, offsetof(struct sym_reg, r))
#define INL(np, r) INL_OFF(np, offsetof(struct sym_reg, r))
#define OUTB(np, r, v) OUTB_OFF(np, offsetof(struct sym_reg, r), (v))
#define OUTW(np, r, v) OUTW_OFF(np, offsetof(struct sym_reg, r), (v))
#define OUTL(np, r, v) OUTL_OFF(np, offsetof(struct sym_reg, r), (v))
#define OUTONB(np, r, m) OUTB(np, r, INB(np, r) | (m))
#define OUTOFFB(np, r, m) OUTB(np, r, INB(np, r) & ~(m))
#define OUTONW(np, r, m) OUTW(np, r, INW(np, r) | (m))
#define OUTOFFW(np, r, m) OUTW(np, r, INW(np, r) & ~(m))
#define OUTONL(np, r, m) OUTL(np, r, INL(np, r) | (m))
#define OUTOFFL(np, r, m) OUTL(np, r, INL(np, r) & ~(m))
/*
* We normally want the chip to have a consistent view
* of driver internal data structures when we restart it.
* Thus these macros.
*/
#define OUTL_DSP(np, v) \
do { \
MEMORY_WRITE_BARRIER(); \
OUTL(np, nc_dsp, (v)); \
} while (0)
#define OUTONB_STD() \
do { \
MEMORY_WRITE_BARRIER(); \
OUTONB(np, nc_dcntl, (STD|NOCOM)); \
} while (0)
/*
* Command control block states.
*/
#define HS_IDLE (0)
#define HS_BUSY (1)
#define HS_NEGOTIATE (2) /* sync/wide data transfer*/
#define HS_DISCONNECT (3) /* Disconnected by target */
#define HS_WAIT (4) /* waiting for resource */
#define HS_DONEMASK (0x80)
#define HS_COMPLETE (4|HS_DONEMASK)
#define HS_SEL_TIMEOUT (5|HS_DONEMASK) /* Selection timeout */
#define HS_UNEXPECTED (6|HS_DONEMASK) /* Unexpected disconnect */
#define HS_COMP_ERR (7|HS_DONEMASK) /* Completed with error */
/*
* Software Interrupt Codes
*/
#define SIR_BAD_SCSI_STATUS (1)
#define SIR_SEL_ATN_NO_MSG_OUT (2)
#define SIR_MSG_RECEIVED (3)
#define SIR_MSG_WEIRD (4)
#define SIR_NEGO_FAILED (5)
#define SIR_NEGO_PROTO (6)
#define SIR_SCRIPT_STOPPED (7)
#define SIR_REJECT_TO_SEND (8)
#define SIR_SWIDE_OVERRUN (9)
#define SIR_SODL_UNDERRUN (10)
#define SIR_RESEL_NO_MSG_IN (11)
#define SIR_RESEL_NO_IDENTIFY (12)
#define SIR_RESEL_BAD_LUN (13)
#define SIR_TARGET_SELECTED (14)
#define SIR_RESEL_BAD_I_T_L (15)
#define SIR_RESEL_BAD_I_T_L_Q (16)
#define SIR_ABORT_SENT (17)
#define SIR_RESEL_ABORTED (18)
#define SIR_MSG_OUT_DONE (19)
#define SIR_COMPLETE_ERROR (20)
#define SIR_DATA_OVERRUN (21)
#define SIR_BAD_PHASE (22)
#if SYM_CONF_DMA_ADDRESSING_MODE == 2
#define SIR_DMAP_DIRTY (23)
#define SIR_MAX (23)
#else
#define SIR_MAX (22)
#endif
/*
* Extended error bit codes.
* xerr_status field of struct sym_ccb.
*/
#define XE_EXTRA_DATA (1) /* unexpected data phase */
#define XE_BAD_PHASE (1<<1) /* illegal phase (4/5) */
#define XE_PARITY_ERR (1<<2) /* unrecovered SCSI parity error */
#define XE_SODL_UNRUN (1<<3) /* ODD transfer in DATA OUT phase */
#define XE_SWIDE_OVRUN (1<<4) /* ODD transfer in DATA IN phase */
/*
* Negotiation status.
* nego_status field of struct sym_ccb.
*/
#define NS_SYNC (1)
#define NS_WIDE (2)
#define NS_PPR (3)
/*
* A CCB hashed table is used to retrieve CCB address
* from DSA value.
*/
#define CCB_HASH_SHIFT 8
#define CCB_HASH_SIZE (1UL << CCB_HASH_SHIFT)
#define CCB_HASH_MASK (CCB_HASH_SIZE-1)
#if 1
#define CCB_HASH_CODE(dsa) \
(((dsa) >> (_LGRU16_(sizeof(struct sym_ccb)))) & CCB_HASH_MASK)
#else
#define CCB_HASH_CODE(dsa) (((dsa) >> 9) & CCB_HASH_MASK)
#endif
#if SYM_CONF_DMA_ADDRESSING_MODE == 2
/*
* We may want to use segment registers for 64 bit DMA.
* 16 segments registers -> up to 64 GB addressable.
*/
#define SYM_DMAP_SHIFT (4)
#define SYM_DMAP_SIZE (1u<<SYM_DMAP_SHIFT)
#define SYM_DMAP_MASK (SYM_DMAP_SIZE-1)
#endif
/*
* Device flags.
*/
#define SYM_DISC_ENABLED (1)
#define SYM_TAGS_ENABLED (1<<1)
#define SYM_SCAN_BOOT_DISABLED (1<<2)
#define SYM_SCAN_LUNS_DISABLED (1<<3)
/*
* Host adapter miscellaneous flags.
*/
#define SYM_AVOID_BUS_RESET (1)
/*
* Misc.
*/
#define SYM_SNOOP_TIMEOUT (10000000)
#define BUS_8_BIT 0
#define BUS_16_BIT 1
/*
* Gather negotiable parameters value
*/
struct sym_trans {
u8 period;
u8 offset;
unsigned int width:1;
unsigned int iu:1;
unsigned int dt:1;
unsigned int qas:1;
unsigned int check_nego:1;
unsigned int renego:2;
};
/*
* Global TCB HEADER.
*
* Due to lack of indirect addressing on earlier NCR chips,
* this substructure is copied from the TCB to a global
* address after selection.
* For SYMBIOS chips that support LOAD/STORE this copy is
* not needed and thus not performed.
*/
struct sym_tcbh {
/*
* Scripts bus addresses of LUN table accessed from scripts.
* LUN #0 is a special case, since multi-lun devices are rare,
* and we we want to speed-up the general case and not waste
* resources.
*/
u32 luntbl_sa; /* bus address of this table */
u32 lun0_sa; /* bus address of LCB #0 */
/*
* Actual SYNC/WIDE IO registers value for this target.
* 'sval', 'wval' and 'uval' are read from SCRIPTS and
* so have alignment constraints.
*/
/*0*/ u_char uval; /* -> SCNTL4 register */
/*1*/ u_char sval; /* -> SXFER io register */
/*2*/ u_char filler1;
/*3*/ u_char wval; /* -> SCNTL3 io register */
};
/*
* Target Control Block
*/
struct sym_tcb {
/*
* TCB header.
* Assumed at offset 0.
*/
/*0*/ struct sym_tcbh head;
/*
* LUN table used by the SCRIPTS processor.
* An array of bus addresses is used on reselection.
*/
u32 *luntbl; /* LCBs bus address table */
/*
* LUN table used by the C code.
*/
struct sym_lcb *lun0p; /* LCB of LUN #0 (usual case) */
#if SYM_CONF_MAX_LUN > 1
struct sym_lcb **lunmp; /* Other LCBs [1..MAX_LUN] */
#endif
#ifdef SYM_HAVE_STCB
/*
* O/S specific data structure.
*/
struct sym_stcb s;
#endif
/* Transfer goal */
struct sym_trans tgoal;
/*
* Keep track of the CCB used for the negotiation in order
* to ensure that only 1 negotiation is queued at a time.
*/
struct sym_ccb * nego_cp; /* CCB used for the nego */
/*
* Set when we want to reset the device.
*/
u_char to_reset;
/*
* Other user settable limits and options.
* These limits are read from the NVRAM if present.
*/
unsigned char usrflags;
unsigned char usr_period;
unsigned char usr_width;
unsigned short usrtags;
struct scsi_target *starget;
};
/*
* Global LCB HEADER.
*
* Due to lack of indirect addressing on earlier NCR chips,
* this substructure is copied from the LCB to a global
* address after selection.
* For SYMBIOS chips that support LOAD/STORE this copy is
* not needed and thus not performed.
*/
struct sym_lcbh {
/*
* SCRIPTS address jumped by SCRIPTS on reselection.
* For not probed logical units, this address points to
* SCRIPTS that deal with bad LU handling (must be at
* offset zero of the LCB for that reason).
*/
/*0*/ u32 resel_sa;
/*
* Task (bus address of a CCB) read from SCRIPTS that points
* to the unique ITL nexus allowed to be disconnected.
*/
u32 itl_task_sa;
/*
* Task table bus address (read from SCRIPTS).
*/
u32 itlq_tbl_sa;
};
/*
* Logical Unit Control Block
*/
struct sym_lcb {
/*
* TCB header.
* Assumed at offset 0.
*/
/*0*/ struct sym_lcbh head;
/*
* Task table read from SCRIPTS that contains pointers to
* ITLQ nexuses. The bus address read from SCRIPTS is
* inside the header.
*/
u32 *itlq_tbl; /* Kernel virtual address */
/*
* Busy CCBs management.
*/
u_short busy_itlq; /* Number of busy tagged CCBs */
u_short busy_itl; /* Number of busy untagged CCBs */
/*
* Circular tag allocation buffer.
*/
u_short ia_tag; /* Tag allocation index */
u_short if_tag; /* Tag release index */
u_char *cb_tags; /* Circular tags buffer */
/*
* O/S specific data structure.
*/
#ifdef SYM_HAVE_SLCB
struct sym_slcb s;
#endif
#ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
/*
* Optionnaly the driver can handle device queueing,
* and requeues internally command to redo.
*/
SYM_QUEHEAD waiting_ccbq;
SYM_QUEHEAD started_ccbq;
int num_sgood;
u_short started_tags;
u_short started_no_tag;
u_short started_max;
u_short started_limit;
#endif
#ifdef SYM_OPT_LIMIT_COMMAND_REORDERING
/*
* Optionally the driver can try to prevent SCSI
* IOs from being reordered too much.
*/
u_char tags_si; /* Current index to tags sum */
u_short tags_sum[2]; /* Tags sum counters */
u_short tags_since; /* # of tags since last switch */
#endif
/*
* Set when we want to clear all tasks.
*/
u_char to_clear;
/*
* Capabilities.
*/
u_char user_flags;
u_char curr_flags;
};
/*
* Action from SCRIPTS on a task.
* Is part of the CCB, but is also used separately to plug
* error handling action to perform from SCRIPTS.
*/
struct sym_actscr {
u32 start; /* Jumped by SCRIPTS after selection */
u32 restart; /* Jumped by SCRIPTS on relection */
};
/*
* Phase mismatch context.
*
* It is part of the CCB and is used as parameters for the
* DATA pointer. We need two contexts to handle correctly the
* SAVED DATA POINTER.
*/
struct sym_pmc {
struct sym_tblmove sg; /* Updated interrupted SG block */
u32 ret; /* SCRIPT return address */
};
/*
* LUN control block lookup.
* We use a direct pointer for LUN #0, and a table of
* pointers which is only allocated for devices that support
* LUN(s) > 0.
*/
#if SYM_CONF_MAX_LUN <= 1
#define sym_lp(tp, lun) (!lun) ? (tp)->lun0p : NULL
#else
#define sym_lp(tp, lun) \
(!lun) ? (tp)->lun0p : (tp)->lunmp ? (tp)->lunmp[(lun)] : NULL
#endif
/*
* Status are used by the host and the script processor.
*
* The last four bytes (status[4]) are copied to the
* scratchb register (declared as scr0..scr3) just after the
* select/reselect, and copied back just after disconnecting.
* Inside the script the XX_REG are used.
*/
/*
* Last four bytes (script)
*/
#define HX_REG scr0
#define HX_PRT nc_scr0
#define HS_REG scr1
#define HS_PRT nc_scr1
#define SS_REG scr2
#define SS_PRT nc_scr2
#define HF_REG scr3
#define HF_PRT nc_scr3
/*
* Last four bytes (host)
*/
#define host_xflags phys.head.status[0]
#define host_status phys.head.status[1]
#define ssss_status phys.head.status[2]
#define host_flags phys.head.status[3]
/*
* Host flags
*/
#define HF_IN_PM0 1u
#define HF_IN_PM1 (1u<<1)
#define HF_ACT_PM (1u<<2)
#define HF_DP_SAVED (1u<<3)
#define HF_SENSE (1u<<4)
#define HF_EXT_ERR (1u<<5)
#define HF_DATA_IN (1u<<6)
#ifdef SYM_CONF_IARB_SUPPORT
#define HF_HINT_IARB (1u<<7)
#endif
/*
* More host flags
*/
#if SYM_CONF_DMA_ADDRESSING_MODE == 2
#define HX_DMAP_DIRTY (1u<<7)
#endif
/*
* Global CCB HEADER.
*
* Due to lack of indirect addressing on earlier NCR chips,
* this substructure is copied from the ccb to a global
* address after selection (or reselection) and copied back
* before disconnect.
* For SYMBIOS chips that support LOAD/STORE this copy is
* not needed and thus not performed.
*/
struct sym_ccbh {
/*
* Start and restart SCRIPTS addresses (must be at 0).
*/
/*0*/ struct sym_actscr go;
/*
* SCRIPTS jump address that deal with data pointers.
* 'savep' points to the position in the script responsible
* for the actual transfer of data.
* It's written on reception of a SAVE_DATA_POINTER message.
*/
u32 savep; /* Jump address to saved data pointer */
u32 lastp; /* SCRIPTS address at end of data */
/*
* Status fields.
*/
u8 status[4];
};
/*
* GET/SET the value of the data pointer used by SCRIPTS.
*
* We must distinguish between the LOAD/STORE-based SCRIPTS
* that use directly the header in the CCB, and the NCR-GENERIC
* SCRIPTS that use the copy of the header in the HCB.
*/
#if SYM_CONF_GENERIC_SUPPORT
#define sym_set_script_dp(np, cp, dp) \
do { \
if (np->features & FE_LDSTR) \
cp->phys.head.lastp = cpu_to_scr(dp); \
else \
np->ccb_head.lastp = cpu_to_scr(dp); \
} while (0)
#define sym_get_script_dp(np, cp) \
scr_to_cpu((np->features & FE_LDSTR) ? \
cp->phys.head.lastp : np->ccb_head.lastp)
#else
#define sym_set_script_dp(np, cp, dp) \
do { \
cp->phys.head.lastp = cpu_to_scr(dp); \
} while (0)
#define sym_get_script_dp(np, cp) (cp->phys.head.lastp)
#endif
/*
* Data Structure Block
*
* During execution of a ccb by the script processor, the
* DSA (data structure address) register points to this
* substructure of the ccb.
*/
struct sym_dsb {
/*
* CCB header.
* Also assumed at offset 0 of the sym_ccb structure.
*/
/*0*/ struct sym_ccbh head;
/*
* Phase mismatch contexts.
* We need two to handle correctly the SAVED DATA POINTER.
* MUST BOTH BE AT OFFSET < 256, due to using 8 bit arithmetic
* for address calculation from SCRIPTS.
*/
struct sym_pmc pm0;
struct sym_pmc pm1;
/*
* Table data for Script
*/
struct sym_tblsel select;
struct sym_tblmove smsg;
struct sym_tblmove smsg_ext;
struct sym_tblmove cmd;
struct sym_tblmove sense;
struct sym_tblmove wresid;
struct sym_tblmove data [SYM_CONF_MAX_SG];
};
/*
* Our Command Control Block
*/
struct sym_ccb {
/*
* This is the data structure which is pointed by the DSA
* register when it is executed by the script processor.
* It must be the first entry.
*/
struct sym_dsb phys;
/*
* Pointer to CAM ccb and related stuff.
*/
struct scsi_cmnd *cmd; /* CAM scsiio ccb */
u8 cdb_buf[16]; /* Copy of CDB */
#define SYM_SNS_BBUF_LEN 32
u8 sns_bbuf[SYM_SNS_BBUF_LEN]; /* Bounce buffer for sense data */
int data_len; /* Total data length */
int segments; /* Number of SG segments */
u8 order; /* Tag type (if tagged command) */
unsigned char odd_byte_adjustment; /* odd-sized req on wide bus */
u_char nego_status; /* Negotiation status */
u_char xerr_status; /* Extended error flags */
u32 extra_bytes; /* Extraneous bytes transferred */
/*
* Message areas.
* We prepare a message to be sent after selection.
* We may use a second one if the command is rescheduled
* due to CHECK_CONDITION or COMMAND TERMINATED.
* Contents are IDENTIFY and SIMPLE_TAG.
* While negotiating sync or wide transfer,
* a SDTR or WDTR message is appended.
*/
u_char scsi_smsg [12];
u_char scsi_smsg2[12];
/*
* Auto request sense related fields.
*/
u_char sensecmd[6]; /* Request Sense command */
u_char sv_scsi_status; /* Saved SCSI status */
u_char sv_xerr_status; /* Saved extended status */
int sv_resid; /* Saved residual */
/*
* Other fields.
*/
u32 ccb_ba; /* BUS address of this CCB */
u_short tag; /* Tag for this transfer */
/* NO_TAG means no tag */
u_char target;
u_char lun;
struct sym_ccb *link_ccbh; /* Host adapter CCB hash chain */
SYM_QUEHEAD link_ccbq; /* Link to free/busy CCB queue */
u32 startp; /* Initial data pointer */
u32 goalp; /* Expected last data pointer */
int ext_sg; /* Extreme data pointer, used */
int ext_ofs; /* to calculate the residual. */
#ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
SYM_QUEHEAD link2_ccbq; /* Link for device queueing */
u_char started; /* CCB queued to the squeue */
#endif
u_char to_abort; /* Want this IO to be aborted */
#ifdef SYM_OPT_LIMIT_COMMAND_REORDERING
u_char tags_si; /* Lun tags sum index (0,1) */
#endif
};
#define CCB_BA(cp,lbl) cpu_to_scr(cp->ccb_ba + offsetof(struct sym_ccb, lbl))
typedef struct device *m_pool_ident_t;
/*
* Host Control Block
*/
struct sym_hcb {
/*
* Global headers.
* Due to poorness of addressing capabilities, earlier
* chips (810, 815, 825) copy part of the data structures
* (CCB, TCB and LCB) in fixed areas.
*/
#if SYM_CONF_GENERIC_SUPPORT
struct sym_ccbh ccb_head;
struct sym_tcbh tcb_head;
struct sym_lcbh lcb_head;
#endif
/*
* Idle task and invalid task actions and
* their bus addresses.
*/
struct sym_actscr idletask, notask, bad_itl, bad_itlq;
u32 idletask_ba, notask_ba, bad_itl_ba, bad_itlq_ba;
/*
* Dummy lun table to protect us against target
* returning bad lun number on reselection.
*/
u32 *badluntbl; /* Table physical address */
u32 badlun_sa; /* SCRIPT handler BUS address */
/*
* Bus address of this host control block.
*/
u32 hcb_ba;
/*
* Bit 32-63 of the on-chip RAM bus address in LE format.
* The START_RAM64 script loads the MMRS and MMWS from this
* field.
*/
u32 scr_ram_seg;
/*
* Initial value of some IO register bits.
* These values are assumed to have been set by BIOS, and may
* be used to probe adapter implementation differences.
*/
u_char sv_scntl0, sv_scntl3, sv_dmode, sv_dcntl, sv_ctest3, sv_ctest4,
sv_ctest5, sv_gpcntl, sv_stest2, sv_stest4, sv_scntl4,
sv_stest1;
/*
* Actual initial value of IO register bits used by the
* driver. They are loaded at initialisation according to
* features that are to be enabled/disabled.
*/
u_char rv_scntl0, rv_scntl3, rv_dmode, rv_dcntl, rv_ctest3, rv_ctest4,
rv_ctest5, rv_stest2, rv_ccntl0, rv_ccntl1, rv_scntl4;
/*
* Target data.
*/
struct sym_tcb target[SYM_CONF_MAX_TARGET];
/*
* Target control block bus address array used by the SCRIPT
* on reselection.
*/
u32 *targtbl;
u32 targtbl_ba;
/*
* DMA pool handle for this HBA.
*/
m_pool_ident_t bus_dmat;
/*
* O/S specific data structure
*/
struct sym_shcb s;
/*
* Physical bus addresses of the chip.
*/
u32 mmio_ba; /* MMIO 32 bit BUS address */
u32 ram_ba; /* RAM 32 bit BUS address */
/*
* SCRIPTS virtual and physical bus addresses.
* 'script' is loaded in the on-chip RAM if present.
* 'scripth' stays in main memory for all chips except the
* 53C895A, 53C896 and 53C1010 that provide 8K on-chip RAM.
*/
u_char *scripta0; /* Copy of scripts A, B, Z */
u_char *scriptb0;
u_char *scriptz0;
u32 scripta_ba; /* Actual scripts A, B, Z */
u32 scriptb_ba; /* 32 bit bus addresses. */
u32 scriptz_ba;
u_short scripta_sz; /* Actual size of script A, B, Z*/
u_short scriptb_sz;
u_short scriptz_sz;
/*
* Bus addresses, setup and patch methods for
* the selected firmware.
*/
struct sym_fwa_ba fwa_bas; /* Useful SCRIPTA bus addresses */
struct sym_fwb_ba fwb_bas; /* Useful SCRIPTB bus addresses */
struct sym_fwz_ba fwz_bas; /* Useful SCRIPTZ bus addresses */
void (*fw_setup)(struct sym_hcb *np, struct sym_fw *fw);
void (*fw_patch)(struct Scsi_Host *);
char *fw_name;
/*
* General controller parameters and configuration.
*/
u_int features; /* Chip features map */
u_char myaddr; /* SCSI id of the adapter */
u_char maxburst; /* log base 2 of dwords burst */
u_char maxwide; /* Maximum transfer width */
u_char minsync; /* Min sync period factor (ST) */
u_char maxsync; /* Max sync period factor (ST) */
u_char maxoffs; /* Max scsi offset (ST) */
u_char minsync_dt; /* Min sync period factor (DT) */
u_char maxsync_dt; /* Max sync period factor (DT) */
u_char maxoffs_dt; /* Max scsi offset (DT) */
u_char multiplier; /* Clock multiplier (1,2,4) */
u_char clock_divn; /* Number of clock divisors */
u32 clock_khz; /* SCSI clock frequency in KHz */
u32 pciclk_khz; /* Estimated PCI clock in KHz */
/*
* Start queue management.
* It is filled up by the host processor and accessed by the
* SCRIPTS processor in order to start SCSI commands.
*/
volatile /* Prevent code optimizations */
u32 *squeue; /* Start queue virtual address */
u32 squeue_ba; /* Start queue BUS address */
u_short squeueput; /* Next free slot of the queue */
u_short actccbs; /* Number of allocated CCBs */
/*
* Command completion queue.
* It is the same size as the start queue to avoid overflow.
*/
u_short dqueueget; /* Next position to scan */
volatile /* Prevent code optimizations */
u32 *dqueue; /* Completion (done) queue */
u32 dqueue_ba; /* Done queue BUS address */
/*
* Miscellaneous buffers accessed by the scripts-processor.
* They shall be DWORD aligned, because they may be read or
* written with a script command.
*/
u_char msgout[8]; /* Buffer for MESSAGE OUT */
u_char msgin [8]; /* Buffer for MESSAGE IN */
u32 lastmsg; /* Last SCSI message sent */
u32 scratch; /* Scratch for SCSI receive */
/* Also used for cache test */
/*
* Miscellaneous configuration and status parameters.
*/
u_char usrflags; /* Miscellaneous user flags */
u_char scsi_mode; /* Current SCSI BUS mode */
u_char verbose; /* Verbosity for this controller*/
/*
* CCB lists and queue.
*/
struct sym_ccb **ccbh; /* CCBs hashed by DSA value */
/* CCB_HASH_SIZE lists of CCBs */
SYM_QUEHEAD free_ccbq; /* Queue of available CCBs */
SYM_QUEHEAD busy_ccbq; /* Queue of busy CCBs */
/*
* During error handling and/or recovery,
* active CCBs that are to be completed with
* error or requeued are moved from the busy_ccbq
* to the comp_ccbq prior to completion.
*/
SYM_QUEHEAD comp_ccbq;
#ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
SYM_QUEHEAD dummy_ccbq;
#endif
/*
* IMMEDIATE ARBITRATION (IARB) control.
*
* We keep track in 'last_cp' of the last CCB that has been
* queued to the SCRIPTS processor and clear 'last_cp' when
* this CCB completes. If last_cp is not zero at the moment
* we queue a new CCB, we set a flag in 'last_cp' that is
* used by the SCRIPTS as a hint for setting IARB.
* We donnot set more than 'iarb_max' consecutive hints for
* IARB in order to leave devices a chance to reselect.
* By the way, any non zero value of 'iarb_max' is unfair. :)
*/
#ifdef SYM_CONF_IARB_SUPPORT
u_short iarb_max; /* Max. # consecutive IARB hints*/
u_short iarb_count; /* Actual # of these hints */
struct sym_ccb * last_cp;
#endif
/*
* Command abort handling.
* We need to synchronize tightly with the SCRIPTS
* processor in order to handle things correctly.
*/
u_char abrt_msg[4]; /* Message to send buffer */
struct sym_tblmove abrt_tbl; /* Table for the MOV of it */
struct sym_tblsel abrt_sel; /* Sync params for selection */
u_char istat_sem; /* Tells the chip to stop (SEM) */
/*
* 64 bit DMA handling.
*/
#if SYM_CONF_DMA_ADDRESSING_MODE != 0
u_char use_dac; /* Use PCI DAC cycles */
#if SYM_CONF_DMA_ADDRESSING_MODE == 2
u_char dmap_dirty; /* Dma segments registers dirty */
u32 dmap_bah[SYM_DMAP_SIZE];/* Segment registers map */
#endif
#endif
};
#if SYM_CONF_DMA_ADDRESSING_MODE == 0
#define use_dac(np) 0
#define set_dac(np) do { } while (0)
#else
#define use_dac(np) (np)->use_dac
#define set_dac(np) (np)->use_dac = 1
#endif
#define HCB_BA(np, lbl) (np->hcb_ba + offsetof(struct sym_hcb, lbl))
/*
* FIRMWARES (sym_fw.c)
*/
struct sym_fw * sym_find_firmware(struct sym_chip *chip);
void sym_fw_bind_script(struct sym_hcb *np, u32 *start, int len);
/*
* Driver methods called from O/S specific code.
*/
char *sym_driver_name(void);
void sym_print_xerr(struct scsi_cmnd *cmd, int x_status);
int sym_reset_scsi_bus(struct sym_hcb *np, int enab_int);
struct sym_chip *sym_lookup_chip_table(u_short device_id, u_char revision);
#ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
void sym_start_next_ccbs(struct sym_hcb *np, struct sym_lcb *lp, int maxn);
#else
void sym_put_start_queue(struct sym_hcb *np, struct sym_ccb *cp);
#endif
void sym_start_up(struct Scsi_Host *, int reason);
irqreturn_t sym_interrupt(struct Scsi_Host *);
int sym_clear_tasks(struct sym_hcb *np, int cam_status, int target, int lun, int task);
struct sym_ccb *sym_get_ccb(struct sym_hcb *np, struct scsi_cmnd *cmd, u_char tag_order);
void sym_free_ccb(struct sym_hcb *np, struct sym_ccb *cp);
struct sym_lcb *sym_alloc_lcb(struct sym_hcb *np, u_char tn, u_char ln);
int sym_queue_scsiio(struct sym_hcb *np, struct scsi_cmnd *csio, struct sym_ccb *cp);
int sym_abort_scsiio(struct sym_hcb *np, struct scsi_cmnd *ccb, int timed_out);
int sym_reset_scsi_target(struct sym_hcb *np, int target);
void sym_hcb_free(struct sym_hcb *np);
int sym_hcb_attach(struct Scsi_Host *shost, struct sym_fw *fw, struct sym_nvram *nvram);
/*
* Build a scatter/gather entry.
*
* For 64 bit systems, we use the 8 upper bits of the size field
* to provide bus address bits 32-39 to the SCRIPTS processor.
* This allows the 895A, 896, 1010 to address up to 1 TB of memory.
*/
#if SYM_CONF_DMA_ADDRESSING_MODE == 0
#define DMA_DAC_MASK DMA_32BIT_MASK
#define sym_build_sge(np, data, badd, len) \
do { \
(data)->addr = cpu_to_scr(badd); \
(data)->size = cpu_to_scr(len); \
} while (0)
#elif SYM_CONF_DMA_ADDRESSING_MODE == 1
#define DMA_DAC_MASK DMA_40BIT_MASK
#define sym_build_sge(np, data, badd, len) \
do { \
(data)->addr = cpu_to_scr(badd); \
(data)->size = cpu_to_scr((((badd) >> 8) & 0xff000000) + len); \
} while (0)
#elif SYM_CONF_DMA_ADDRESSING_MODE == 2
#define DMA_DAC_MASK DMA_64BIT_MASK
int sym_lookup_dmap(struct sym_hcb *np, u32 h, int s);
static __inline void
sym_build_sge(struct sym_hcb *np, struct sym_tblmove *data, u64 badd, int len)
{
u32 h = (badd>>32);
int s = (h&SYM_DMAP_MASK);
if (h != np->dmap_bah[s])
goto bad;
good:
(data)->addr = cpu_to_scr(badd);
(data)->size = cpu_to_scr((s<<24) + len);
return;
bad:
s = sym_lookup_dmap(np, h, s);
goto good;
}
#else
#error "Unsupported DMA addressing mode"
#endif
/*
* MEMORY ALLOCATOR.
*/
#define sym_get_mem_cluster() \
(void *) __get_free_pages(GFP_ATOMIC, SYM_MEM_PAGE_ORDER)
#define sym_free_mem_cluster(p) \
free_pages((unsigned long)p, SYM_MEM_PAGE_ORDER)
/*
* Link between free memory chunks of a given size.
*/
typedef struct sym_m_link {
struct sym_m_link *next;
} *m_link_p;
/*
* Virtual to bus physical translation for a given cluster.
* Such a structure is only useful with DMA abstraction.
*/
typedef struct sym_m_vtob { /* Virtual to Bus address translation */
struct sym_m_vtob *next;
void *vaddr; /* Virtual address */
dma_addr_t baddr; /* Bus physical address */
} *m_vtob_p;
/* Hash this stuff a bit to speed up translations */
#define VTOB_HASH_SHIFT 5
#define VTOB_HASH_SIZE (1UL << VTOB_HASH_SHIFT)
#define VTOB_HASH_MASK (VTOB_HASH_SIZE-1)
#define VTOB_HASH_CODE(m) \
((((unsigned long)(m)) >> SYM_MEM_CLUSTER_SHIFT) & VTOB_HASH_MASK)
/*
* Memory pool of a given kind.
* Ideally, we want to use:
* 1) 1 pool for memory we donnot need to involve in DMA.
* 2) The same pool for controllers that require same DMA
* constraints and features.
* The OS specific m_pool_id_t thing and the sym_m_pool_match()
* method are expected to tell the driver about.
*/
typedef struct sym_m_pool {
m_pool_ident_t dev_dmat; /* Identifies the pool (see above) */
void * (*get_mem_cluster)(struct sym_m_pool *);
#ifdef SYM_MEM_FREE_UNUSED
void (*free_mem_cluster)(struct sym_m_pool *, void *);
#endif
#define M_GET_MEM_CLUSTER() mp->get_mem_cluster(mp)
#define M_FREE_MEM_CLUSTER(p) mp->free_mem_cluster(mp, p)
int nump;
m_vtob_p vtob[VTOB_HASH_SIZE];
struct sym_m_pool *next;
struct sym_m_link h[SYM_MEM_CLUSTER_SHIFT - SYM_MEM_SHIFT + 1];
} *m_pool_p;
/*
* Alloc, free and translate addresses to bus physical
* for DMAable memory.
*/
void *__sym_calloc_dma(m_pool_ident_t dev_dmat, int size, char *name);
void __sym_mfree_dma(m_pool_ident_t dev_dmat, void *m, int size, char *name);
dma_addr_t __vtobus(m_pool_ident_t dev_dmat, void *m);
/*
* Verbs used by the driver code for DMAable memory handling.
* The _uvptv_ macro avoids a nasty warning about pointer to volatile
* being discarded.
*/
#define _uvptv_(p) ((void *)((u_long)(p)))
#define _sym_calloc_dma(np, l, n) __sym_calloc_dma(np->bus_dmat, l, n)
#define _sym_mfree_dma(np, p, l, n) \
__sym_mfree_dma(np->bus_dmat, _uvptv_(p), l, n)
#define sym_calloc_dma(l, n) _sym_calloc_dma(np, l, n)
#define sym_mfree_dma(p, l, n) _sym_mfree_dma(np, p, l, n)
#define vtobus(p) __vtobus(np->bus_dmat, _uvptv_(p))
/*
* We have to provide the driver memory allocator with methods for
* it to maintain virtual to bus physical address translations.
*/
#define sym_m_pool_match(mp_id1, mp_id2) (mp_id1 == mp_id2)
static __inline void *sym_m_get_dma_mem_cluster(m_pool_p mp, m_vtob_p vbp)
{
void *vaddr = NULL;
dma_addr_t baddr = 0;
vaddr = dma_alloc_coherent(mp->dev_dmat, SYM_MEM_CLUSTER_SIZE, &baddr,
GFP_ATOMIC);
if (vaddr) {
vbp->vaddr = vaddr;
vbp->baddr = baddr;
}
return vaddr;
}
static __inline void sym_m_free_dma_mem_cluster(m_pool_p mp, m_vtob_p vbp)
{
dma_free_coherent(mp->dev_dmat, SYM_MEM_CLUSTER_SIZE, vbp->vaddr,
vbp->baddr);
}
#endif /* SYM_HIPD_H */
Reference in New Issue View Git Blame Copy Permalink