53c700.h
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上传日期:2013-02-24
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- /* -*- mode: c; c-basic-offset: 8 -*- */
- /* Driver for 53c700 and 53c700-66 chips from NCR and Symbios
- *
- * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com
- */
- #ifndef _53C700_H
- #define _53C700_H
- /* Turn on for general debugging---too verbose for normal use */
- #undef NCR_700_DEBUG
- /* Debug the tag queues, checking hash queue allocation and deallocation
- * and search for duplicate tags */
- #undef NCR_700_TAG_DEBUG
- #ifdef NCR_700_DEBUG
- #define DEBUG(x) printk x
- #else
- #define DEBUG(x)
- #endif
- /* The number of available command slots */
- #define NCR_700_COMMAND_SLOTS_PER_HOST 64
- /* The maximum number of Scatter Gathers we allow */
- #define NCR_700_SG_SEGMENTS 32
- /* The maximum number of luns (make this of the form 2^n) */
- #define NCR_700_MAX_LUNS 32
- #define NCR_700_LUN_MASK (NCR_700_MAX_LUNS - 1)
- /* Alter this with care: too many tags won't give the elevator a chance to
- * work; too few will cause the device to operate less efficiently */
- #define NCR_700_MAX_TAGS 16
- /* magic byte identifying an internally generated REQUEST_SENSE command */
- #define NCR_700_INTERNAL_SENSE_MAGIC 0x42
- /* WARNING: Leave this in for now: the dependency preprocessor doesn't
- * pick up file specific flags, so must define here if they are not
- * set */
- #if !defined(CONFIG_53C700_IO_MAPPED) && !defined(CONFIG_53C700_MEM_MAPPED)
- #error "Config.in must define either CONFIG_53C700_IO_MAPPED or CONFIG_53C700_MEM_MAPPED to use this scsi core."
- #endif
- /* macros for consistent memory allocation */
- #ifdef CONFIG_53C700_USE_CONSISTENT
- #define NCR_700_dma_cache_wback(mem, size)
- if(!hostdata->consistent)
- dma_cache_wback(mem, size)
- #define NCR_700_dma_cache_inv(mem, size)
- if(!hostdata->consistent)
- dma_cache_inv(mem, size)
- #define NCR_700_dma_cache_wback_inv(mem, size)
- if(!hostdata->consistent)
- dma_cache_wback_inv(mem, size)
- #else
- #define NCR_700_dma_cache_wback(mem, size) dma_cache_wback(mem,size)
- #define NCR_700_dma_cache_inv(mem, size) dma_cache_inv(mem,size)
- #define NCR_700_dma_cache_wback_inv(mem, size) dma_cache_wback_inv(mem,size)
- #endif
- struct NCR_700_Host_Parameters;
- /* These are the externally used routines */
- struct Scsi_Host *NCR_700_detect(Scsi_Host_Template *, struct NCR_700_Host_Parameters *);
- int NCR_700_release(struct Scsi_Host *host);
- void NCR_700_intr(int, void *, struct pt_regs *);
- enum NCR_700_Host_State {
- NCR_700_HOST_BUSY,
- NCR_700_HOST_FREE,
- };
- struct NCR_700_SG_List {
- /* The following is a script fragment to move the buffer onto the
- * bus and then link the next fragment or return */
- #define SCRIPT_MOVE_DATA_IN 0x09000000
- #define SCRIPT_MOVE_DATA_OUT 0x08000000
- __u32 ins;
- __u32 pAddr;
- #define SCRIPT_NOP 0x80000000
- #define SCRIPT_RETURN 0x90080000
- };
- /* We use device->hostdata to store negotiated parameters. This is
- * supposed to be a pointer to a device private area, but we cannot
- * really use it as such since it will never be freed, so just use the
- * 32 bits to cram the information. The SYNC negotiation sequence looks
- * like:
- *
- * If DEV_NEGOTIATED_SYNC not set, tack and SDTR message on to the
- * initial identify for the device and set DEV_BEGIN_SYNC_NEGOTATION
- * If we get an SDTR reply, work out the SXFER parameters, squirrel
- * them away here, clear DEV_BEGIN_SYNC_NEGOTIATION and set
- * DEV_NEGOTIATED_SYNC. If we get a REJECT msg, squirrel
- *
- *
- * 0:7 SXFER_REG negotiated value for this device
- * 8:15 Current queue depth
- * 16 negotiated SYNC flag
- * 17 begin SYNC negotiation flag
- * 18 device supports tag queueing */
- #define NCR_700_DEV_NEGOTIATED_SYNC (1<<16)
- #define NCR_700_DEV_BEGIN_SYNC_NEGOTIATION (1<<17)
- #define NCR_700_DEV_BEGIN_TAG_QUEUEING (1<<18)
- #define NCR_700_DEV_TAG_STARVATION_WARNED (1<<19)
- static inline void
- NCR_700_set_SXFER(Scsi_Device *SDp, __u8 sxfer)
- {
- ((unsigned long)SDp->hostdata) &= 0xffffff00;
- ((unsigned long)SDp->hostdata) |= sxfer & 0xff;
- }
- static inline __u8 NCR_700_get_SXFER(Scsi_Device *SDp)
- {
- return (((unsigned long)SDp->hostdata) & 0xff);
- }
- static inline void
- NCR_700_set_depth(Scsi_Device *SDp, __u8 depth)
- {
- ((unsigned long)SDp->hostdata) &= 0xffff00ff;
- ((unsigned long)SDp->hostdata) |= (0xff00 & (depth << 8));
- }
- static inline __u8
- NCR_700_get_depth(Scsi_Device *SDp)
- {
- return ((((unsigned long)SDp->hostdata) & 0xff00)>>8);
- }
- static inline int
- NCR_700_is_flag_set(Scsi_Device *SDp, __u32 flag)
- {
- return (((unsigned long)SDp->hostdata) & flag) == flag;
- }
- static inline int
- NCR_700_is_flag_clear(Scsi_Device *SDp, __u32 flag)
- {
- return (((unsigned long)SDp->hostdata) & flag) == 0;
- }
- static inline void
- NCR_700_set_flag(Scsi_Device *SDp, __u32 flag)
- {
- ((unsigned long)SDp->hostdata) |= (flag & 0xffff0000);
- }
- static inline void
- NCR_700_clear_flag(Scsi_Device *SDp, __u32 flag)
- {
- ((unsigned long)SDp->hostdata) &= ~(flag & 0xffff0000);
- }
- /* These represent the Nexus hashing functions. A Nexus in SCSI terms
- * just means the identification of an outstanding command, by ITL
- * (Initiator Target Lun) or ITLQ (Initiator Target Lun Tag). I'm not
- * very keen on XOR based hashes, so these are based on number theory
- * instead. All you need to do is to fix your hash bucket size and
- * then choose reasonable strides which are coprime with the chosen
- * bucket size
- *
- * Note: this mathematical hash can be made very efficient, if the
- * compiler is good at optimising: Choose the number of buckets to be
- * 2^n and the modulo becomes a logical and with (2^n-1).
- * Additionally, if you chose the coprimes of the form 2^n-2^n the
- * multiplication can be done by a shift and an addition. */
- #define MAX_ITL_HASH_BUCKETS 16
- #define ITL_HASH_PRIME 7
- #define MAX_ITLQ_HASH_BUCKETS 64
- #define ITLQ_PUN_PRIME 7
- #define ITLQ_LUN_PRIME 3
- static inline int
- hash_ITL(__u8 pun, __u8 lun)
- {
- return (pun*ITL_HASH_PRIME + lun) % MAX_ITL_HASH_BUCKETS;
- }
- static inline int
- hash_ITLQ(__u8 pun, __u8 lun, __u8 tag)
- {
- return (pun*ITLQ_PUN_PRIME + lun*ITLQ_LUN_PRIME + tag) % MAX_ITLQ_HASH_BUCKETS;
- }
- struct NCR_700_command_slot {
- struct NCR_700_SG_List SG[NCR_700_SG_SEGMENTS+1];
- struct NCR_700_SG_List *pSG;
- #define NCR_700_SLOT_MASK 0xFC
- #define NCR_700_SLOT_MAGIC 0xb8
- #define NCR_700_SLOT_FREE (0|NCR_700_SLOT_MAGIC) /* slot may be used */
- #define NCR_700_SLOT_BUSY (1|NCR_700_SLOT_MAGIC) /* slot has command active on HA */
- #define NCR_700_SLOT_QUEUED (2|NCR_700_SLOT_MAGIC) /* slot has command to be made active on HA */
- __u8 state;
- #define NCR_700_NO_TAG 0xdead
- __u16 tag;
- __u32 resume_offset;
- Scsi_Cmnd *cmnd;
- /* The pci_mapped address of the actual command in cmnd */
- dma_addr_t pCmd;
- __u32 temp;
- /* if this command is a pci_single mapping, holds the dma address
- * for later unmapping in the done routine */
- dma_addr_t dma_handle;
- /* Doubly linked ITL/ITLQ list kept in strict time order
- * (latest at the back) */
- struct NCR_700_command_slot *ITL_forw;
- struct NCR_700_command_slot *ITL_back;
- struct NCR_700_command_slot *ITLQ_forw;
- struct NCR_700_command_slot *ITLQ_back;
- };
- struct NCR_700_Host_Parameters {
- /* These must be filled in by the calling driver */
- int clock; /* board clock speed in MHz */
- unsigned long base; /* the base for the port (copied to host) */
- struct pci_dev *pci_dev;
- __u32 dmode_extra; /* adjustable bus settings */
- __u32 differential:1; /* if we are differential */
- #ifdef CONFIG_53C700_LE_ON_BE
- /* This option is for HP only. Set it if your chip is wired for
- * little endian on this platform (which is big endian) */
- __u32 force_le_on_be:1;
- #endif
- __u32 chip710:1; /* set if really a 710 not 700 */
- __u32 burst_disable:1; /* set to 1 to disable 710 bursting */
- /* NOTHING BELOW HERE NEEDS ALTERING */
- __u32 fast:1; /* if we can alter the SCSI bus clock
- speed (so can negiotiate sync) */
- #ifdef CONFIG_53C700_USE_CONSISTENT
- __u32 consistent:1;
- #endif
- int sync_clock; /* The speed of the SYNC core */
- __u32 *script; /* pointer to script location */
- __u32 pScript; /* physical mem addr of script */
- /* This will be the host lock. Unfortunately, we can't use it
- * at the moment because of the necessity of holding the
- * io_request_lock */
- spinlock_t lock;
- enum NCR_700_Host_State state; /* protected by state lock */
- Scsi_Cmnd *cmd;
- /* Note: pScript contains the single consistent block of
- * memory. All the msgin, msgout and status are allocated in
- * this memory too (at separate cache lines). TOTAL_MEM_SIZE
- * represents the total size of this area */
- #define MSG_ARRAY_SIZE 8
- #define MSGOUT_OFFSET (L1_CACHE_ALIGN(sizeof(SCRIPT)))
- __u8 *msgout;
- #define MSGIN_OFFSET (MSGOUT_OFFSET + L1_CACHE_ALIGN(MSG_ARRAY_SIZE))
- __u8 *msgin;
- #define STATUS_OFFSET (MSGIN_OFFSET + L1_CACHE_ALIGN(MSG_ARRAY_SIZE))
- __u8 *status;
- #define SLOTS_OFFSET (STATUS_OFFSET + L1_CACHE_ALIGN(MSG_ARRAY_SIZE))
- struct NCR_700_command_slot *slots;
- #define TOTAL_MEM_SIZE (SLOTS_OFFSET + L1_CACHE_ALIGN(sizeof(struct NCR_700_command_slot) * NCR_700_COMMAND_SLOTS_PER_HOST))
- int saved_slot_position;
- int command_slot_count; /* protected by state lock */
- __u8 tag_negotiated;
- __u8 rev;
- __u8 reselection_id;
- /* flags for the host */
- /* ITL list. ALL outstanding commands are hashed here in strict
- * order, latest at the back */
- struct NCR_700_command_slot *ITL_Hash_forw[MAX_ITL_HASH_BUCKETS];
- struct NCR_700_command_slot *ITL_Hash_back[MAX_ITL_HASH_BUCKETS];
- /* Only tagged outstanding commands are hashed here (also latest
- * at the back) */
- struct NCR_700_command_slot *ITLQ_Hash_forw[MAX_ITLQ_HASH_BUCKETS];
- struct NCR_700_command_slot *ITLQ_Hash_back[MAX_ITLQ_HASH_BUCKETS];
- /* Free list, singly linked by ITL_forw elements */
- struct NCR_700_command_slot *free_list;
- };
- /*
- * 53C700 Register Interface - the offset from the Selected base
- * I/O address */
- #ifdef CONFIG_53C700_LE_ON_BE
- #define bE (hostdata->force_le_on_be ? 0 : 3)
- #define bSWAP (hostdata->force_le_on_be)
- #elif defined(__BIG_ENDIAN)
- #define bE 3
- #define bSWAP 0
- #elif defined(__LITTLE_ENDIAN)
- #define bE 0
- #define bSWAP 0
- #else
- #error "__BIG_ENDIAN or __LITTLE_ENDIAN must be defined, did you include byteorder.h?"
- #endif
- #define bS_to_cpu(x) (bSWAP ? le32_to_cpu(x) : (x))
- #define bS_to_host(x) (bSWAP ? cpu_to_le32(x) : (x))
- /* NOTE: These registers are in the LE register space only, the required byte
- * swapping is done by the NCR_700_{read|write}[b] functions */
- #define SCNTL0_REG 0x00
- #define FULL_ARBITRATION 0xc0
- #define PARITY 0x08
- #define ENABLE_PARITY 0x04
- #define AUTO_ATN 0x02
- #define SCNTL1_REG 0x01
- #define SLOW_BUS 0x80
- #define ENABLE_SELECT 0x20
- #define ASSERT_RST 0x08
- #define ASSERT_EVEN_PARITY 0x04
- #define SDID_REG 0x02
- #define SIEN_REG 0x03
- #define PHASE_MM_INT 0x80
- #define FUNC_COMP_INT 0x40
- #define SEL_TIMEOUT_INT 0x20
- #define SELECT_INT 0x10
- #define GROSS_ERR_INT 0x08
- #define UX_DISC_INT 0x04
- #define RST_INT 0x02
- #define PAR_ERR_INT 0x01
- #define SCID_REG 0x04
- #define SXFER_REG 0x05
- #define ASYNC_OPERATION 0x00
- #define SODL_REG 0x06
- #define SOCL_REG 0x07
- #define SFBR_REG 0x08
- #define SIDL_REG 0x09
- #define SBDL_REG 0x0A
- #define SBCL_REG 0x0B
- /* read bits */
- #define SBCL_IO 0x01
- /*write bits */
- #define SYNC_DIV_AS_ASYNC 0x00
- #define SYNC_DIV_1_0 0x01
- #define SYNC_DIV_1_5 0x02
- #define SYNC_DIV_2_0 0x03
- #define DSTAT_REG 0x0C
- #define ILGL_INST_DETECTED 0x01
- #define WATCH_DOG_INTERRUPT 0x02
- #define SCRIPT_INT_RECEIVED 0x04
- #define ABORTED 0x10
- #define SSTAT0_REG 0x0D
- #define PARITY_ERROR 0x01
- #define SCSI_RESET_DETECTED 0x02
- #define UNEXPECTED_DISCONNECT 0x04
- #define SCSI_GROSS_ERROR 0x08
- #define SELECTED 0x10
- #define SELECTION_TIMEOUT 0x20
- #define FUNCTION_COMPLETE 0x40
- #define PHASE_MISMATCH 0x80
- #define SSTAT1_REG 0x0E
- #define SIDL_REG_FULL 0x80
- #define SODR_REG_FULL 0x40
- #define SODL_REG_FULL 0x20
- #define SSTAT2_REG 0x0F
- #define CTEST0_REG 0x14
- #define BTB_TIMER_DISABLE 0x40
- #define CTEST1_REG 0x15
- #define CTEST2_REG 0x16
- #define CTEST3_REG 0x17
- #define CTEST4_REG 0x18
- #define DISABLE_FIFO 0x00
- #define SLBE 0x10
- #define SFWR 0x08
- #define BYTE_LANE0 0x04
- #define BYTE_LANE1 0x05
- #define BYTE_LANE2 0x06
- #define BYTE_LANE3 0x07
- #define SCSI_ZMODE 0x20
- #define ZMODE 0x40
- #define CTEST5_REG 0x19
- #define MASTER_CONTROL 0x10
- #define DMA_DIRECTION 0x08
- #define CTEST7_REG 0x1B
- #define BURST_DISABLE 0x80 /* 710 only */
- #define SEL_TIMEOUT_DISABLE 0x10 /* 710 only */
- #define DFP 0x08
- #define EVP 0x04
- #define DIFF 0x01
- #define CTEST6_REG 0x1A
- #define TEMP_REG 0x1C
- #define DFIFO_REG 0x20
- #define FLUSH_DMA_FIFO 0x80
- #define CLR_FIFO 0x40
- #define ISTAT_REG 0x21
- #define ABORT_OPERATION 0x80
- #define SOFTWARE_RESET_710 0x40
- #define DMA_INT_PENDING 0x01
- #define SCSI_INT_PENDING 0x02
- #define CONNECTED 0x08
- #define CTEST8_REG 0x22
- #define LAST_DIS_ENBL 0x01
- #define SHORTEN_FILTERING 0x04
- #define ENABLE_ACTIVE_NEGATION 0x10
- #define GENERATE_RECEIVE_PARITY 0x20
- #define CLR_FIFO_710 0x04
- #define FLUSH_DMA_FIFO_710 0x08
- #define CTEST9_REG 0x23
- #define DBC_REG 0x24
- #define DCMD_REG 0x27
- #define DNAD_REG 0x28
- #define DIEN_REG 0x39
- #define BUS_FAULT 0x20
- #define ABORT_INT 0x10
- #define INT_INST_INT 0x04
- #define WD_INT 0x02
- #define ILGL_INST_INT 0x01
- #define DCNTL_REG 0x3B
- #define SOFTWARE_RESET 0x01
- #define COMPAT_700_MODE 0x01
- #define SCRPTS_16BITS 0x20
- #define ASYNC_DIV_2_0 0x00
- #define ASYNC_DIV_1_5 0x40
- #define ASYNC_DIV_1_0 0x80
- #define ASYNC_DIV_3_0 0xc0
- #define DMODE_710_REG 0x38
- #define DMODE_700_REG 0x34
- #define BURST_LENGTH_1 0x00
- #define BURST_LENGTH_2 0x40
- #define BURST_LENGTH_4 0x80
- #define BURST_LENGTH_8 0xC0
- #define DMODE_FC1 0x10
- #define DMODE_FC2 0x20
- #define BW16 32
- #define MODE_286 16
- #define IO_XFER 8
- #define FIXED_ADDR 4
- #define DSP_REG 0x2C
- #define DSPS_REG 0x30
- /* Parameters to begin SDTR negotiations. Empirically, I find that
- * the 53c700-66 cannot handle an offset >8, so don't change this */
- #define NCR_700_MAX_OFFSET 8
- /* Was hoping the max offset would be greater for the 710, but
- * empirically it seems to be 8 also */
- #define NCR_710_MAX_OFFSET 8
- #define NCR_700_MIN_XFERP 1
- #define NCR_710_MIN_XFERP 0
- #define NCR_700_MIN_PERIOD 25 /* for SDTR message, 100ns */
- #define script_patch_32(script, symbol, value)
- {
- int i;
- for(i=0; i< (sizeof(A_##symbol##_used) / sizeof(__u32)); i++) {
- __u32 val = bS_to_cpu((script)[A_##symbol##_used[i]]) + value;
- (script)[A_##symbol##_used[i]] = bS_to_host(val);
- dma_cache_wback((unsigned long)&(script)[A_##symbol##_used[i]], 4);
- DEBUG((" script, patching %s at %d to 0x%lxn",
- #symbol, A_##symbol##_used[i], (value)));
- }
- }
- #define script_patch_32_abs(script, symbol, value)
- {
- int i;
- for(i=0; i< (sizeof(A_##symbol##_used) / sizeof(__u32)); i++) {
- (script)[A_##symbol##_used[i]] = bS_to_host(value);
- dma_cache_wback((unsigned long)&(script)[A_##symbol##_used[i]], 4);
- DEBUG((" script, patching %s at %d to 0x%lxn",
- #symbol, A_##symbol##_used[i], (value)));
- }
- }
- /* Used for patching the SCSI ID in the SELECT instruction */
- #define script_patch_ID(script, symbol, value)
- {
- int i;
- for(i=0; i< (sizeof(A_##symbol##_used) / sizeof(__u32)); i++) {
- __u32 val = bS_to_cpu((script)[A_##symbol##_used[i]]);
- val &= 0xff00ffff;
- val |= ((value) & 0xff) << 16;
- (script)[A_##symbol##_used[i]] = bS_to_host(val);
- dma_cache_wback((unsigned long)&(script)[A_##symbol##_used[i]], 4);
- DEBUG((" script, patching ID field %s at %d to 0x%xn",
- #symbol, A_##symbol##_used[i], val));
- }
- }
- #define script_patch_16(script, symbol, value)
- {
- int i;
- for(i=0; i< (sizeof(A_##symbol##_used) / sizeof(__u32)); i++) {
- __u32 val = bS_to_cpu((script)[A_##symbol##_used[i]]);
- val &= 0xffff0000;
- val |= ((value) & 0xffff);
- (script)[A_##symbol##_used[i]] = bS_to_host(val);
- dma_cache_wback((unsigned long)&(script)[A_##symbol##_used[i]], 4);
- DEBUG((" script, patching short field %s at %d to 0x%xn",
- #symbol, A_##symbol##_used[i], val));
- }
- }
- #endif
- #ifdef CONFIG_53C700_MEM_MAPPED
- static inline __u8
- NCR_700_readb(struct Scsi_Host *host, __u32 reg)
- {
- const struct NCR_700_Host_Parameters *hostdata __attribute__((unused))
- = (struct NCR_700_Host_Parameters *)host->hostdata[0];
- return readb(host->base + (reg^bE));
- }
- static inline __u32
- NCR_700_readl(struct Scsi_Host *host, __u32 reg)
- {
- __u32 value = __raw_readl(host->base + reg);
- const struct NCR_700_Host_Parameters *hostdata __attribute__((unused))
- = (struct NCR_700_Host_Parameters *)host->hostdata[0];
- #if 1
- /* sanity check the register */
- if((reg & 0x3) != 0)
- BUG();
- #endif
- return bS_to_cpu(value);
- }
- static inline void
- NCR_700_writeb(__u8 value, struct Scsi_Host *host, __u32 reg)
- {
- const struct NCR_700_Host_Parameters *hostdata __attribute__((unused))
- = (struct NCR_700_Host_Parameters *)host->hostdata[0];
- writeb(value, host->base + (reg^bE));
- }
- static inline void
- NCR_700_writel(__u32 value, struct Scsi_Host *host, __u32 reg)
- {
- const struct NCR_700_Host_Parameters *hostdata __attribute__((unused))
- = (struct NCR_700_Host_Parameters *)host->hostdata[0];
- #if 1
- /* sanity check the register */
- if((reg & 0x3) != 0)
- BUG();
- #endif
- __raw_writel(bS_to_host(value), host->base + reg);
- }
- #elif defined(CONFIG_53C700_IO_MAPPED)
- static inline __u8
- NCR_700_readb(struct Scsi_Host *host, __u32 reg)
- {
- const struct NCR_700_Host_Parameters *hostdata __attribute__((unused))
- = (struct NCR_700_Host_Parameters *)host->hostdata[0];
- return inb(host->base + (reg^bE));
- }
- static inline __u32
- NCR_700_readl(struct Scsi_Host *host, __u32 reg)
- {
- __u32 value = inl(host->base + reg);
- const struct NCR_700_Host_Parameters *hostdata __attribute__((unused))
- = (struct NCR_700_Host_Parameters *)host->hostdata[0];
- #if 1
- /* sanity check the register */
- if((reg & 0x3) != 0)
- BUG();
- #endif
- return bS_to_cpu(value);
- }
- static inline void
- NCR_700_writeb(__u8 value, struct Scsi_Host *host, __u32 reg)
- {
- const struct NCR_700_Host_Parameters *hostdata __attribute__((unused))
- = (struct NCR_700_Host_Parameters *)host->hostdata[0];
- outb(value, host->base + (reg^bE));
- }
- static inline void
- NCR_700_writel(__u32 value, struct Scsi_Host *host, __u32 reg)
- {
- const struct NCR_700_Host_Parameters *hostdata __attribute__((unused))
- = (struct NCR_700_Host_Parameters *)host->hostdata[0];
- #if 1
- /* sanity check the register */
- if((reg & 0x3) != 0)
- BUG();
- #endif
- outl(bS_to_host(value), host->base + reg);
- }
- #endif