/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * 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> * *-----------------------------------------------------------------------------
*/
#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 reasonable 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)
/* * 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
#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 */
/* * 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
/* * 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 */
};
/* * LUN table used by the SCRIPTS processor. * An array of bus addresses is used on reselection.
*/
u32 *luntbl; /* LCBs bus address table */ int nlcb; /* Number of valid LCBs (including LUN #0) */
/* * 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;
/* Last printed transfer speed */ struct sym_trans tprint;
/* * 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.
*/ unsignedchar usrflags; unsignedchar usr_period; unsignedchar usr_width; unsignedshort 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;
/* * 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[((u8)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.
*/
/* * 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)
/* * 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) */ unsignedchar odd_byte_adjustment; /* odd-sized req on wide bus */
/* * 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
};
/* * 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 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;
/* * 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) */
/* * 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_free_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_BIT_MASK(32) #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_BIT_MASK(40) #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_BIT_MASK(64) int sym_lookup_dmap(struct sym_hcb *np, u32 h, int s); staticinlinevoid
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);
/* * Link between free memory chunks of a given size.
*/ typedefstruct 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.
*/ typedefstruct 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) \
((((unsignedlong)(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.
*/ typedefstruct 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)))
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.
