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linux-next/drivers/scsi/aic7xxx/aic79xx_osm.h
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

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/*
* Adaptec AIC79xx device driver for Linux.
*
* Copyright (c) 2000-2001 Adaptec Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.h#137 $
*
*/
#ifndef _AIC79XX_LINUX_H_
#define _AIC79XX_LINUX_H_
#include <linux/types.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/smp_lock.h>
#include <linux/version.h>
#include <linux/module.h>
#include <asm/byteorder.h>
#include <asm/io.h>
#include <linux/interrupt.h> /* For tasklet support. */
#include <linux/config.h>
#include <linux/slab.h>
/* Core SCSI definitions */
#define AIC_LIB_PREFIX ahd
#include "scsi.h"
#include <scsi/scsi_host.h>
/* Name space conflict with BSD queue macros */
#ifdef LIST_HEAD
#undef LIST_HEAD
#endif
#include "cam.h"
#include "queue.h"
#include "scsi_message.h"
#include "scsi_iu.h"
#include "aiclib.h"
/*********************************** Debugging ********************************/
#ifdef CONFIG_AIC79XX_DEBUG_ENABLE
#ifdef CONFIG_AIC79XX_DEBUG_MASK
#define AHD_DEBUG 1
#define AHD_DEBUG_OPTS CONFIG_AIC79XX_DEBUG_MASK
#else
/*
* Compile in debugging code, but do not enable any printfs.
*/
#define AHD_DEBUG 1
#define AHD_DEBUG_OPTS 0
#endif
/* No debugging code. */
#endif
/********************************** Misc Macros *******************************/
#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
#define powerof2(x) ((((x)-1)&(x))==0)
/************************* Forward Declarations *******************************/
struct ahd_softc;
typedef struct pci_dev *ahd_dev_softc_t;
typedef Scsi_Cmnd *ahd_io_ctx_t;
/******************************* Byte Order ***********************************/
#define ahd_htobe16(x) cpu_to_be16(x)
#define ahd_htobe32(x) cpu_to_be32(x)
#define ahd_htobe64(x) cpu_to_be64(x)
#define ahd_htole16(x) cpu_to_le16(x)
#define ahd_htole32(x) cpu_to_le32(x)
#define ahd_htole64(x) cpu_to_le64(x)
#define ahd_be16toh(x) be16_to_cpu(x)
#define ahd_be32toh(x) be32_to_cpu(x)
#define ahd_be64toh(x) be64_to_cpu(x)
#define ahd_le16toh(x) le16_to_cpu(x)
#define ahd_le32toh(x) le32_to_cpu(x)
#define ahd_le64toh(x) le64_to_cpu(x)
#ifndef LITTLE_ENDIAN
#define LITTLE_ENDIAN 1234
#endif
#ifndef BIG_ENDIAN
#define BIG_ENDIAN 4321
#endif
#ifndef BYTE_ORDER
#if defined(__BIG_ENDIAN)
#define BYTE_ORDER BIG_ENDIAN
#endif
#if defined(__LITTLE_ENDIAN)
#define BYTE_ORDER LITTLE_ENDIAN
#endif
#endif /* BYTE_ORDER */
/************************* Configuration Data *********************************/
extern uint32_t aic79xx_allow_memio;
extern int aic79xx_detect_complete;
extern Scsi_Host_Template aic79xx_driver_template;
/***************************** Bus Space/DMA **********************************/
typedef uint32_t bus_size_t;
typedef enum {
BUS_SPACE_MEMIO,
BUS_SPACE_PIO
} bus_space_tag_t;
typedef union {
u_long ioport;
volatile uint8_t __iomem *maddr;
} bus_space_handle_t;
typedef struct bus_dma_segment
{
dma_addr_t ds_addr;
bus_size_t ds_len;
} bus_dma_segment_t;
struct ahd_linux_dma_tag
{
bus_size_t alignment;
bus_size_t boundary;
bus_size_t maxsize;
};
typedef struct ahd_linux_dma_tag* bus_dma_tag_t;
struct ahd_linux_dmamap
{
dma_addr_t bus_addr;
};
typedef struct ahd_linux_dmamap* bus_dmamap_t;
typedef int bus_dma_filter_t(void*, dma_addr_t);
typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
#define BUS_DMA_WAITOK 0x0
#define BUS_DMA_NOWAIT 0x1
#define BUS_DMA_ALLOCNOW 0x2
#define BUS_DMA_LOAD_SEGS 0x4 /*
* Argument is an S/G list not
* a single buffer.
*/
#define BUS_SPACE_MAXADDR 0xFFFFFFFF
#define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF
#define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF
int ahd_dma_tag_create(struct ahd_softc *, bus_dma_tag_t /*parent*/,
bus_size_t /*alignment*/, bus_size_t /*boundary*/,
dma_addr_t /*lowaddr*/, dma_addr_t /*highaddr*/,
bus_dma_filter_t*/*filter*/, void */*filterarg*/,
bus_size_t /*maxsize*/, int /*nsegments*/,
bus_size_t /*maxsegsz*/, int /*flags*/,
bus_dma_tag_t */*dma_tagp*/);
void ahd_dma_tag_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/);
int ahd_dmamem_alloc(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
void** /*vaddr*/, int /*flags*/,
bus_dmamap_t* /*mapp*/);
void ahd_dmamem_free(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
void* /*vaddr*/, bus_dmamap_t /*map*/);
void ahd_dmamap_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/,
bus_dmamap_t /*map*/);
int ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t /*dmat*/,
bus_dmamap_t /*map*/, void * /*buf*/,
bus_size_t /*buflen*/, bus_dmamap_callback_t *,
void */*callback_arg*/, int /*flags*/);
int ahd_dmamap_unload(struct ahd_softc *, bus_dma_tag_t, bus_dmamap_t);
/*
* Operations performed by ahd_dmamap_sync().
*/
#define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */
#define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */
#define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */
#define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */
/*
* XXX
* ahd_dmamap_sync is only used on buffers allocated with
* the pci_alloc_consistent() API. Although I'm not sure how
* this works on architectures with a write buffer, Linux does
* not have an API to sync "coherent" memory. Perhaps we need
* to do an mb()?
*/
#define ahd_dmamap_sync(ahd, dma_tag, dmamap, offset, len, op)
/************************** Timer DataStructures ******************************/
typedef struct timer_list ahd_timer_t;
/********************************** Includes **********************************/
#ifdef CONFIG_AIC79XX_REG_PRETTY_PRINT
#define AIC_DEBUG_REGISTERS 1
#else
#define AIC_DEBUG_REGISTERS 0
#endif
#include "aic79xx.h"
/***************************** Timer Facilities *******************************/
#define ahd_timer_init init_timer
#define ahd_timer_stop del_timer_sync
typedef void ahd_linux_callback_t (u_long);
static __inline void ahd_timer_reset(ahd_timer_t *timer, u_int usec,
ahd_callback_t *func, void *arg);
static __inline void ahd_scb_timer_reset(struct scb *scb, u_int usec);
static __inline void
ahd_timer_reset(ahd_timer_t *timer, u_int usec, ahd_callback_t *func, void *arg)
{
struct ahd_softc *ahd;
ahd = (struct ahd_softc *)arg;
del_timer(timer);
timer->data = (u_long)arg;
timer->expires = jiffies + (usec * HZ)/1000000;
timer->function = (ahd_linux_callback_t*)func;
add_timer(timer);
}
static __inline void
ahd_scb_timer_reset(struct scb *scb, u_int usec)
{
mod_timer(&scb->io_ctx->eh_timeout, jiffies + (usec * HZ)/1000000);
}
/***************************** SMP support ************************************/
#include <linux/spinlock.h>
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) || defined(SCSI_HAS_HOST_LOCK))
#define AHD_SCSI_HAS_HOST_LOCK 1
#else
#define AHD_SCSI_HAS_HOST_LOCK 0
#endif
#define AIC79XX_DRIVER_VERSION "1.3.11"
/**************************** Front End Queues ********************************/
/*
* Data structure used to cast the Linux struct scsi_cmnd to something
* that allows us to use the queue macros. The linux structure has
* plenty of space to hold the links fields as required by the queue
* macros, but the queue macors require them to have the correct type.
*/
struct ahd_cmd_internal {
/* Area owned by the Linux scsi layer. */
uint8_t private[offsetof(struct scsi_cmnd, SCp.Status)];
union {
STAILQ_ENTRY(ahd_cmd) ste;
LIST_ENTRY(ahd_cmd) le;
TAILQ_ENTRY(ahd_cmd) tqe;
} links;
uint32_t end;
};
struct ahd_cmd {
union {
struct ahd_cmd_internal icmd;
struct scsi_cmnd scsi_cmd;
} un;
};
#define acmd_icmd(cmd) ((cmd)->un.icmd)
#define acmd_scsi_cmd(cmd) ((cmd)->un.scsi_cmd)
#define acmd_links un.icmd.links
/*************************** Device Data Structures ***************************/
/*
* A per probed device structure used to deal with some error recovery
* scenarios that the Linux mid-layer code just doesn't know how to
* handle. The structure allocated for a device only becomes persistent
* after a successfully completed inquiry command to the target when
* that inquiry data indicates a lun is present.
*/
TAILQ_HEAD(ahd_busyq, ahd_cmd);
typedef enum {
AHD_DEV_UNCONFIGURED = 0x01,
AHD_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
AHD_DEV_TIMER_ACTIVE = 0x04, /* Our timer is active */
AHD_DEV_ON_RUN_LIST = 0x08, /* Queued to be run later */
AHD_DEV_Q_BASIC = 0x10, /* Allow basic device queuing */
AHD_DEV_Q_TAGGED = 0x20, /* Allow full SCSI2 command queueing */
AHD_DEV_PERIODIC_OTAG = 0x40, /* Send OTAG to prevent starvation */
AHD_DEV_SLAVE_CONFIGURED = 0x80 /* slave_configure() has been called */
} ahd_linux_dev_flags;
struct ahd_linux_target;
struct ahd_linux_device {
TAILQ_ENTRY(ahd_linux_device) links;
struct ahd_busyq busyq;
/*
* The number of transactions currently
* queued to the device.
*/
int active;
/*
* The currently allowed number of
* transactions that can be queued to
* the device. Must be signed for
* conversion from tagged to untagged
* mode where the device may have more
* than one outstanding active transaction.
*/
int openings;
/*
* A positive count indicates that this
* device's queue is halted.
*/
u_int qfrozen;
/*
* Cumulative command counter.
*/
u_long commands_issued;
/*
* The number of tagged transactions when
* running at our current opening level
* that have been successfully received by
* this device since the last QUEUE FULL.
*/
u_int tag_success_count;
#define AHD_TAG_SUCCESS_INTERVAL 50
ahd_linux_dev_flags flags;
/*
* Per device timer.
*/
struct timer_list timer;
/*
* The high limit for the tags variable.
*/
u_int maxtags;
/*
* The computed number of tags outstanding
* at the time of the last QUEUE FULL event.
*/
u_int tags_on_last_queuefull;
/*
* How many times we have seen a queue full
* with the same number of tags. This is used
* to stop our adaptive queue depth algorithm
* on devices with a fixed number of tags.
*/
u_int last_queuefull_same_count;
#define AHD_LOCK_TAGS_COUNT 50
/*
* How many transactions have been queued
* without the device going idle. We use
* this statistic to determine when to issue
* an ordered tag to prevent transaction
* starvation. This statistic is only updated
* if the AHD_DEV_PERIODIC_OTAG flag is set
* on this device.
*/
u_int commands_since_idle_or_otag;
#define AHD_OTAG_THRESH 500
int lun;
Scsi_Device *scsi_device;
struct ahd_linux_target *target;
};
typedef enum {
AHD_DV_REQUIRED = 0x01,
AHD_INQ_VALID = 0x02,
AHD_BASIC_DV = 0x04,
AHD_ENHANCED_DV = 0x08
} ahd_linux_targ_flags;
/* DV States */
typedef enum {
AHD_DV_STATE_EXIT = 0,
AHD_DV_STATE_INQ_SHORT_ASYNC,
AHD_DV_STATE_INQ_ASYNC,
AHD_DV_STATE_INQ_ASYNC_VERIFY,
AHD_DV_STATE_TUR,
AHD_DV_STATE_REBD,
AHD_DV_STATE_INQ_VERIFY,
AHD_DV_STATE_WEB,
AHD_DV_STATE_REB,
AHD_DV_STATE_SU,
AHD_DV_STATE_BUSY
} ahd_dv_state;
struct ahd_linux_target {
struct ahd_linux_device *devices[AHD_NUM_LUNS];
int channel;
int target;
int refcount;
struct ahd_transinfo last_tinfo;
struct ahd_softc *ahd;
ahd_linux_targ_flags flags;
struct scsi_inquiry_data *inq_data;
/*
* The next "fallback" period to use for narrow/wide transfers.
*/
uint8_t dv_next_narrow_period;
uint8_t dv_next_wide_period;
uint8_t dv_max_width;
uint8_t dv_max_ppr_options;
uint8_t dv_last_ppr_options;
u_int dv_echo_size;
ahd_dv_state dv_state;
u_int dv_state_retry;
uint8_t *dv_buffer;
uint8_t *dv_buffer1;
/*
* Cumulative counter of errors.
*/
u_long errors_detected;
u_long cmds_since_error;
};
/********************* Definitions Required by the Core ***********************/
/*
* Number of SG segments we require. So long as the S/G segments for
* a particular transaction are allocated in a physically contiguous
* manner and are allocated below 4GB, the number of S/G segments is
* unrestricted.
*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
/*
* We dynamically adjust the number of segments in pre-2.5 kernels to
* avoid fragmentation issues in the SCSI mid-layer's private memory
* allocator. See aic79xx_osm.c ahd_linux_size_nseg() for details.
*/
extern u_int ahd_linux_nseg;
#define AHD_NSEG ahd_linux_nseg
#define AHD_LINUX_MIN_NSEG 64
#else
#define AHD_NSEG 128
#endif
/*
* Per-SCB OSM storage.
*/
typedef enum {
AHD_SCB_UP_EH_SEM = 0x1
} ahd_linux_scb_flags;
struct scb_platform_data {
struct ahd_linux_device *dev;
dma_addr_t buf_busaddr;
uint32_t xfer_len;
uint32_t sense_resid; /* Auto-Sense residual */
ahd_linux_scb_flags flags;
};
/*
* Define a structure used for each host adapter. All members are
* aligned on a boundary >= the size of the member to honor the
* alignment restrictions of the various platforms supported by
* this driver.
*/
typedef enum {
AHD_DV_WAIT_SIMQ_EMPTY = 0x01,
AHD_DV_WAIT_SIMQ_RELEASE = 0x02,
AHD_DV_ACTIVE = 0x04,
AHD_DV_SHUTDOWN = 0x08,
AHD_RUN_CMPLT_Q_TIMER = 0x10
} ahd_linux_softc_flags;
TAILQ_HEAD(ahd_completeq, ahd_cmd);
struct ahd_platform_data {
/*
* Fields accessed from interrupt context.
*/
struct ahd_linux_target *targets[AHD_NUM_TARGETS];
TAILQ_HEAD(, ahd_linux_device) device_runq;
struct ahd_completeq completeq;
spinlock_t spin_lock;
struct tasklet_struct runq_tasklet;
u_int qfrozen;
pid_t dv_pid;
struct timer_list completeq_timer;
struct timer_list reset_timer;
struct timer_list stats_timer;
struct semaphore eh_sem;
struct semaphore dv_sem;
struct semaphore dv_cmd_sem; /* XXX This needs to be in
* the target struct
*/
struct scsi_device *dv_scsi_dev;
struct Scsi_Host *host; /* pointer to scsi host */
#define AHD_LINUX_NOIRQ ((uint32_t)~0)
uint32_t irq; /* IRQ for this adapter */
uint32_t bios_address;
uint32_t mem_busaddr; /* Mem Base Addr */
uint64_t hw_dma_mask;
ahd_linux_softc_flags flags;
};
/************************** OS Utility Wrappers *******************************/
#define printf printk
#define M_NOWAIT GFP_ATOMIC
#define M_WAITOK 0
#define malloc(size, type, flags) kmalloc(size, flags)
#define free(ptr, type) kfree(ptr)
static __inline void ahd_delay(long);
static __inline void
ahd_delay(long usec)
{
/*
* udelay on Linux can have problems for
* multi-millisecond waits. Wait at most
* 1024us per call.
*/
while (usec > 0) {
udelay(usec % 1024);
usec -= 1024;
}
}
/***************************** Low Level I/O **********************************/
static __inline uint8_t ahd_inb(struct ahd_softc * ahd, long port);
static __inline uint16_t ahd_inw_atomic(struct ahd_softc * ahd, long port);
static __inline void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
static __inline void ahd_outw_atomic(struct ahd_softc * ahd,
long port, uint16_t val);
static __inline void ahd_outsb(struct ahd_softc * ahd, long port,
uint8_t *, int count);
static __inline void ahd_insb(struct ahd_softc * ahd, long port,
uint8_t *, int count);
static __inline uint8_t
ahd_inb(struct ahd_softc * ahd, long port)
{
uint8_t x;
if (ahd->tags[0] == BUS_SPACE_MEMIO) {
x = readb(ahd->bshs[0].maddr + port);
} else {
x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
}
mb();
return (x);
}
static __inline uint16_t
ahd_inw_atomic(struct ahd_softc * ahd, long port)
{
uint8_t x;
if (ahd->tags[0] == BUS_SPACE_MEMIO) {
x = readw(ahd->bshs[0].maddr + port);
} else {
x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
}
mb();
return (x);
}
static __inline void
ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
{
if (ahd->tags[0] == BUS_SPACE_MEMIO) {
writeb(val, ahd->bshs[0].maddr + port);
} else {
outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
}
mb();
}
static __inline void
ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
{
if (ahd->tags[0] == BUS_SPACE_MEMIO) {
writew(val, ahd->bshs[0].maddr + port);
} else {
outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
}
mb();
}
static __inline void
ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
{
int i;
/*
* There is probably a more efficient way to do this on Linux
* but we don't use this for anything speed critical and this
* should work.
*/
for (i = 0; i < count; i++)
ahd_outb(ahd, port, *array++);
}
static __inline void
ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
{
int i;
/*
* There is probably a more efficient way to do this on Linux
* but we don't use this for anything speed critical and this
* should work.
*/
for (i = 0; i < count; i++)
*array++ = ahd_inb(ahd, port);
}
/**************************** Initialization **********************************/
int ahd_linux_register_host(struct ahd_softc *,
Scsi_Host_Template *);
uint64_t ahd_linux_get_memsize(void);
/*************************** Pretty Printing **********************************/
struct info_str {
char *buffer;
int length;
off_t offset;
int pos;
};
void ahd_format_transinfo(struct info_str *info,
struct ahd_transinfo *tinfo);
/******************************** Locking *************************************/
/* Lock protecting internal data structures */
static __inline void ahd_lockinit(struct ahd_softc *);
static __inline void ahd_lock(struct ahd_softc *, unsigned long *flags);
static __inline void ahd_unlock(struct ahd_softc *, unsigned long *flags);
/* Lock acquisition and release of the above lock in midlayer entry points. */
static __inline void ahd_midlayer_entrypoint_lock(struct ahd_softc *,
unsigned long *flags);
static __inline void ahd_midlayer_entrypoint_unlock(struct ahd_softc *,
unsigned long *flags);
/* Lock held during command compeletion to the upper layer */
static __inline void ahd_done_lockinit(struct ahd_softc *);
static __inline void ahd_done_lock(struct ahd_softc *, unsigned long *flags);
static __inline void ahd_done_unlock(struct ahd_softc *, unsigned long *flags);
/* Lock held during ahd_list manipulation and ahd softc frees */
extern spinlock_t ahd_list_spinlock;
static __inline void ahd_list_lockinit(void);
static __inline void ahd_list_lock(unsigned long *flags);
static __inline void ahd_list_unlock(unsigned long *flags);
static __inline void
ahd_lockinit(struct ahd_softc *ahd)
{
spin_lock_init(&ahd->platform_data->spin_lock);
}
static __inline void
ahd_lock(struct ahd_softc *ahd, unsigned long *flags)
{
spin_lock_irqsave(&ahd->platform_data->spin_lock, *flags);
}
static __inline void
ahd_unlock(struct ahd_softc *ahd, unsigned long *flags)
{
spin_unlock_irqrestore(&ahd->platform_data->spin_lock, *flags);
}
static __inline void
ahd_midlayer_entrypoint_lock(struct ahd_softc *ahd, unsigned long *flags)
{
/*
* In 2.5.X and some 2.4.X versions, the midlayer takes our
* lock just before calling us, so we avoid locking again.
* For other kernel versions, the io_request_lock is taken
* just before our entry point is called. In this case, we
* trade the io_request_lock for our per-softc lock.
*/
#if AHD_SCSI_HAS_HOST_LOCK == 0
spin_unlock(&io_request_lock);
spin_lock(&ahd->platform_data->spin_lock);
#endif
}
static __inline void
ahd_midlayer_entrypoint_unlock(struct ahd_softc *ahd, unsigned long *flags)
{
#if AHD_SCSI_HAS_HOST_LOCK == 0
spin_unlock(&ahd->platform_data->spin_lock);
spin_lock(&io_request_lock);
#endif
}
static __inline void
ahd_done_lockinit(struct ahd_softc *ahd)
{
/*
* In 2.5.X, our own lock is held during completions.
* In previous versions, the io_request_lock is used.
* In either case, we can't initialize this lock again.
*/
}
static __inline void
ahd_done_lock(struct ahd_softc *ahd, unsigned long *flags)
{
#if AHD_SCSI_HAS_HOST_LOCK == 0
spin_lock(&io_request_lock);
#endif
}
static __inline void
ahd_done_unlock(struct ahd_softc *ahd, unsigned long *flags)
{
#if AHD_SCSI_HAS_HOST_LOCK == 0
spin_unlock(&io_request_lock);
#endif
}
static __inline void
ahd_list_lockinit(void)
{
spin_lock_init(&ahd_list_spinlock);
}
static __inline void
ahd_list_lock(unsigned long *flags)
{
spin_lock_irqsave(&ahd_list_spinlock, *flags);
}
static __inline void
ahd_list_unlock(unsigned long *flags)
{
spin_unlock_irqrestore(&ahd_list_spinlock, *flags);
}
/******************************* PCI Definitions ******************************/
/*
* PCIM_xxx: mask to locate subfield in register
* PCIR_xxx: config register offset
* PCIC_xxx: device class
* PCIS_xxx: device subclass
* PCIP_xxx: device programming interface
* PCIV_xxx: PCI vendor ID (only required to fixup ancient devices)
* PCID_xxx: device ID
*/
#define PCIR_DEVVENDOR 0x00
#define PCIR_VENDOR 0x00
#define PCIR_DEVICE 0x02
#define PCIR_COMMAND 0x04
#define PCIM_CMD_PORTEN 0x0001
#define PCIM_CMD_MEMEN 0x0002
#define PCIM_CMD_BUSMASTEREN 0x0004
#define PCIM_CMD_MWRICEN 0x0010
#define PCIM_CMD_PERRESPEN 0x0040
#define PCIM_CMD_SERRESPEN 0x0100
#define PCIR_STATUS 0x06
#define PCIR_REVID 0x08
#define PCIR_PROGIF 0x09
#define PCIR_SUBCLASS 0x0a
#define PCIR_CLASS 0x0b
#define PCIR_CACHELNSZ 0x0c
#define PCIR_LATTIMER 0x0d
#define PCIR_HEADERTYPE 0x0e
#define PCIM_MFDEV 0x80
#define PCIR_BIST 0x0f
#define PCIR_CAP_PTR 0x34
/* config registers for header type 0 devices */
#define PCIR_MAPS 0x10
#define PCIR_SUBVEND_0 0x2c
#define PCIR_SUBDEV_0 0x2e
/****************************** PCI-X definitions *****************************/
#define PCIXR_COMMAND 0x96
#define PCIXR_DEVADDR 0x98
#define PCIXM_DEVADDR_FNUM 0x0003 /* Function Number */
#define PCIXM_DEVADDR_DNUM 0x00F8 /* Device Number */
#define PCIXM_DEVADDR_BNUM 0xFF00 /* Bus Number */
#define PCIXR_STATUS 0x9A
#define PCIXM_STATUS_64BIT 0x0001 /* Active 64bit connection to device. */
#define PCIXM_STATUS_133CAP 0x0002 /* Device is 133MHz capable */
#define PCIXM_STATUS_SCDISC 0x0004 /* Split Completion Discarded */
#define PCIXM_STATUS_UNEXPSC 0x0008 /* Unexpected Split Completion */
#define PCIXM_STATUS_CMPLEXDEV 0x0010 /* Device Complexity (set == bridge) */
#define PCIXM_STATUS_MAXMRDBC 0x0060 /* Maximum Burst Read Count */
#define PCIXM_STATUS_MAXSPLITS 0x0380 /* Maximum Split Transactions */
#define PCIXM_STATUS_MAXCRDS 0x1C00 /* Maximum Cumulative Read Size */
#define PCIXM_STATUS_RCVDSCEM 0x2000 /* Received a Split Comp w/Error msg */
extern struct pci_driver aic79xx_pci_driver;
typedef enum
{
AHD_POWER_STATE_D0,
AHD_POWER_STATE_D1,
AHD_POWER_STATE_D2,
AHD_POWER_STATE_D3
} ahd_power_state;
void ahd_power_state_change(struct ahd_softc *ahd,
ahd_power_state new_state);
/******************************* PCI Routines *********************************/
int ahd_linux_pci_init(void);
void ahd_linux_pci_exit(void);
int ahd_pci_map_registers(struct ahd_softc *ahd);
int ahd_pci_map_int(struct ahd_softc *ahd);
static __inline uint32_t ahd_pci_read_config(ahd_dev_softc_t pci,
int reg, int width);
static __inline uint32_t
ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
{
switch (width) {
case 1:
{
uint8_t retval;
pci_read_config_byte(pci, reg, &retval);
return (retval);
}
case 2:
{
uint16_t retval;
pci_read_config_word(pci, reg, &retval);
return (retval);
}
case 4:
{
uint32_t retval;
pci_read_config_dword(pci, reg, &retval);
return (retval);
}
default:
panic("ahd_pci_read_config: Read size too big");
/* NOTREACHED */
return (0);
}
}
static __inline void ahd_pci_write_config(ahd_dev_softc_t pci,
int reg, uint32_t value,
int width);
static __inline void
ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
{
switch (width) {
case 1:
pci_write_config_byte(pci, reg, value);
break;
case 2:
pci_write_config_word(pci, reg, value);
break;
case 4:
pci_write_config_dword(pci, reg, value);
break;
default:
panic("ahd_pci_write_config: Write size too big");
/* NOTREACHED */
}
}
static __inline int ahd_get_pci_function(ahd_dev_softc_t);
static __inline int
ahd_get_pci_function(ahd_dev_softc_t pci)
{
return (PCI_FUNC(pci->devfn));
}
static __inline int ahd_get_pci_slot(ahd_dev_softc_t);
static __inline int
ahd_get_pci_slot(ahd_dev_softc_t pci)
{
return (PCI_SLOT(pci->devfn));
}
static __inline int ahd_get_pci_bus(ahd_dev_softc_t);
static __inline int
ahd_get_pci_bus(ahd_dev_softc_t pci)
{
return (pci->bus->number);
}
static __inline void ahd_flush_device_writes(struct ahd_softc *);
static __inline void
ahd_flush_device_writes(struct ahd_softc *ahd)
{
/* XXX Is this sufficient for all architectures??? */
ahd_inb(ahd, INTSTAT);
}
/**************************** Proc FS Support *********************************/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
int ahd_linux_proc_info(char *, char **, off_t, int, int, int);
#else
int ahd_linux_proc_info(struct Scsi_Host *, char *, char **,
off_t, int, int);
#endif
/*************************** Domain Validation ********************************/
#define AHD_DV_CMD(cmd) ((cmd)->scsi_done == ahd_linux_dv_complete)
#define AHD_DV_SIMQ_FROZEN(ahd) \
((((ahd)->platform_data->flags & AHD_DV_ACTIVE) != 0) \
&& (ahd)->platform_data->qfrozen == 1)
/*********************** Transaction Access Wrappers **************************/
static __inline void ahd_cmd_set_transaction_status(Scsi_Cmnd *, uint32_t);
static __inline void ahd_set_transaction_status(struct scb *, uint32_t);
static __inline void ahd_cmd_set_scsi_status(Scsi_Cmnd *, uint32_t);
static __inline void ahd_set_scsi_status(struct scb *, uint32_t);
static __inline uint32_t ahd_cmd_get_transaction_status(Scsi_Cmnd *cmd);
static __inline uint32_t ahd_get_transaction_status(struct scb *);
static __inline uint32_t ahd_cmd_get_scsi_status(Scsi_Cmnd *cmd);
static __inline uint32_t ahd_get_scsi_status(struct scb *);
static __inline void ahd_set_transaction_tag(struct scb *, int, u_int);
static __inline u_long ahd_get_transfer_length(struct scb *);
static __inline int ahd_get_transfer_dir(struct scb *);
static __inline void ahd_set_residual(struct scb *, u_long);
static __inline void ahd_set_sense_residual(struct scb *scb, u_long resid);
static __inline u_long ahd_get_residual(struct scb *);
static __inline u_long ahd_get_sense_residual(struct scb *);
static __inline int ahd_perform_autosense(struct scb *);
static __inline uint32_t ahd_get_sense_bufsize(struct ahd_softc *,
struct scb *);
static __inline void ahd_notify_xfer_settings_change(struct ahd_softc *,
struct ahd_devinfo *);
static __inline void ahd_platform_scb_free(struct ahd_softc *ahd,
struct scb *scb);
static __inline void ahd_freeze_scb(struct scb *scb);
static __inline
void ahd_cmd_set_transaction_status(Scsi_Cmnd *cmd, uint32_t status)
{
cmd->result &= ~(CAM_STATUS_MASK << 16);
cmd->result |= status << 16;
}
static __inline
void ahd_set_transaction_status(struct scb *scb, uint32_t status)
{
ahd_cmd_set_transaction_status(scb->io_ctx,status);
}
static __inline
void ahd_cmd_set_scsi_status(Scsi_Cmnd *cmd, uint32_t status)
{
cmd->result &= ~0xFFFF;
cmd->result |= status;
}
static __inline
void ahd_set_scsi_status(struct scb *scb, uint32_t status)
{
ahd_cmd_set_scsi_status(scb->io_ctx, status);
}
static __inline
uint32_t ahd_cmd_get_transaction_status(Scsi_Cmnd *cmd)
{
return ((cmd->result >> 16) & CAM_STATUS_MASK);
}
static __inline
uint32_t ahd_get_transaction_status(struct scb *scb)
{
return (ahd_cmd_get_transaction_status(scb->io_ctx));
}
static __inline
uint32_t ahd_cmd_get_scsi_status(Scsi_Cmnd *cmd)
{
return (cmd->result & 0xFFFF);
}
static __inline
uint32_t ahd_get_scsi_status(struct scb *scb)
{
return (ahd_cmd_get_scsi_status(scb->io_ctx));
}
static __inline
void ahd_set_transaction_tag(struct scb *scb, int enabled, u_int type)
{
/*
* Nothing to do for linux as the incoming transaction
* has no concept of tag/non tagged, etc.
*/
}
static __inline
u_long ahd_get_transfer_length(struct scb *scb)
{
return (scb->platform_data->xfer_len);
}
static __inline
int ahd_get_transfer_dir(struct scb *scb)
{
return (scb->io_ctx->sc_data_direction);
}
static __inline
void ahd_set_residual(struct scb *scb, u_long resid)
{
scb->io_ctx->resid = resid;
}
static __inline
void ahd_set_sense_residual(struct scb *scb, u_long resid)
{
scb->platform_data->sense_resid = resid;
}
static __inline
u_long ahd_get_residual(struct scb *scb)
{
return (scb->io_ctx->resid);
}
static __inline
u_long ahd_get_sense_residual(struct scb *scb)
{
return (scb->platform_data->sense_resid);
}
static __inline
int ahd_perform_autosense(struct scb *scb)
{
/*
* We always perform autosense in Linux.
* On other platforms this is set on a
* per-transaction basis.
*/
return (1);
}
static __inline uint32_t
ahd_get_sense_bufsize(struct ahd_softc *ahd, struct scb *scb)
{
return (sizeof(struct scsi_sense_data));
}
static __inline void
ahd_notify_xfer_settings_change(struct ahd_softc *ahd,
struct ahd_devinfo *devinfo)
{
/* Nothing to do here for linux */
}
static __inline void
ahd_platform_scb_free(struct ahd_softc *ahd, struct scb *scb)
{
ahd->flags &= ~AHD_RESOURCE_SHORTAGE;
}
int ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg);
void ahd_platform_free(struct ahd_softc *ahd);
void ahd_platform_init(struct ahd_softc *ahd);
void ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb);
void ahd_freeze_simq(struct ahd_softc *ahd);
void ahd_release_simq(struct ahd_softc *ahd);
static __inline void
ahd_freeze_scb(struct scb *scb)
{
if ((scb->io_ctx->result & (CAM_DEV_QFRZN << 16)) == 0) {
scb->io_ctx->result |= CAM_DEV_QFRZN << 16;
scb->platform_data->dev->qfrozen++;
}
}
void ahd_platform_set_tags(struct ahd_softc *ahd,
struct ahd_devinfo *devinfo, ahd_queue_alg);
int ahd_platform_abort_scbs(struct ahd_softc *ahd, int target,
char channel, int lun, u_int tag,
role_t role, uint32_t status);
irqreturn_t
ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs);
void ahd_platform_flushwork(struct ahd_softc *ahd);
int ahd_softc_comp(struct ahd_softc *, struct ahd_softc *);
void ahd_done(struct ahd_softc*, struct scb*);
void ahd_send_async(struct ahd_softc *, char channel,
u_int target, u_int lun, ac_code, void *);
void ahd_print_path(struct ahd_softc *, struct scb *);
void ahd_platform_dump_card_state(struct ahd_softc *ahd);
#ifdef CONFIG_PCI
#define AHD_PCI_CONFIG 1
#else
#define AHD_PCI_CONFIG 0
#endif
#define bootverbose aic79xx_verbose
extern uint32_t aic79xx_verbose;
#endif /* _AIC79XX_LINUX_H_ */
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