/*
* Adaptec AIC7xxx device driver for Linux.
*
* Copyright (c) 1994 John Aycock
* The University of Calgary Department of Computer Science.
*
* 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, 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; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Copyright (c) 2000-2003 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/aic7xxx_osm.h#151 $
*
*/
#ifndef _AIC7XXX_LINUX_H_
#define _AIC7XXX_LINUX_H_
#include <linux/types.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <asm/byteorder.h>
#include <asm/io.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_spi.h>
/* Core SCSI definitions */
#define AIC_LIB_PREFIX ahc
#include "cam.h"
#include "queue.h"
#include "scsi_message.h"
#include "aiclib.h"
/*********************************** Debugging ********************************/
#ifdef CONFIG_AIC7XXX_DEBUG_ENABLE
#ifdef CONFIG_AIC7XXX_DEBUG_MASK
#define AHC_DEBUG 1
#define AHC_DEBUG_OPTS CONFIG_AIC7XXX_DEBUG_MASK
#else
/*
* Compile in debugging code, but do not enable any printfs.
*/
#define AHC_DEBUG 1
#endif
/* No debugging code. */
#endif
/************************* Forward Declarations *******************************/
struct ahc_softc;
typedef struct pci_dev *ahc_dev_softc_t;
typedef struct scsi_cmnd *ahc_io_ctx_t;
/******************************* Byte Order ***********************************/
#define ahc_htobe16(x) cpu_to_be16(x)
#define ahc_htobe32(x) cpu_to_be32(x)
#define ahc_htobe64(x) cpu_to_be64(x)
#define ahc_htole16(x) cpu_to_le16(x)
#define ahc_htole32(x) cpu_to_le32(x)
#define ahc_htole64(x) cpu_to_le64(x)
#define ahc_be16toh(x) be16_to_cpu(x)
#define ahc_be32toh(x) be32_to_cpu(x)
#define ahc_be64toh(x) be64_to_cpu(x)
#define ahc_le16toh(x) le16_to_cpu(x)
#define ahc_le32toh(x) le32_to_cpu(x)
#define ahc_le64toh(x) le64_to_cpu(x)
/************************* Configuration Data *********************************/
extern u_int aic7xxx_no_probe;
extern u_int aic7xxx_allow_memio;
extern struct scsi_host_template aic7xxx_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 ahc_linux_dma_tag
{
bus_size_t alignment;
bus_size_t boundary;
bus_size_t maxsize;
};
typedef struct ahc_linux_dma_tag* bus_dma_tag_t;
typedef dma_addr_t 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 ahc_dma_tag_create(struct ahc_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 ahc_dma_tag_destroy(struct ahc_softc *, bus_dma_tag_t /*tag*/);
int ahc_dmamem_alloc(struct ahc_softc *, bus_dma_tag_t /*dmat*/,
void** /*vaddr*/, int /*flags*/,
bus_dmamap_t* /*mapp*/);
void ahc_dmamem_free(struct ahc_softc *, bus_dma_tag_t /*dmat*/,
void* /*vaddr*/, bus_dmamap_t /*map*/);
void ahc_dmamap_destroy(struct ahc_softc *, bus_dma_tag_t /*tag*/,
bus_dmamap_t /*map*/);
int ahc_dmamap_load(struct ahc_softc *ahc, 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 ahc_dmamap_unload(struct ahc_softc *, bus_dma_tag_t, bus_dmamap_t);
/*
* Operations performed by ahc_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
* ahc_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 ahc_dmamap_sync(ahc, dma_tag, dmamap, offset, len, op)
/********************************** Includes **********************************/
#ifdef CONFIG_AIC7XXX_REG_PRETTY_PRINT
#define AIC_DEBUG_REGISTERS 1
#else
#define AIC_DEBUG_REGISTERS 0
#endif
#include "aic7xxx.h"
/***************************** Timer Facilities *******************************/
static inline void
ahc_scb_timer_reset(struct scb *scb, u_int usec)
{
}
/***************************** SMP support ************************************/
#include <linux/spinlock.h>
#define AIC7XXX_DRIVER_VERSION "7.0"
/*************************** 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.
*/
typedef enum {
AHC_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
AHC_DEV_Q_BASIC = 0x10, /* Allow basic device queuing */
AHC_DEV_Q_TAGGED = 0x20, /* Allow full SCSI2 command queueing */
AHC_DEV_PERIODIC_OTAG = 0x40, /* Send OTAG to prevent starvation */
} ahc_linux_dev_flags;
struct ahc_linux_device {
/*
* 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 AHC_TAG_SUCCESS_INTERVAL 50
ahc_linux_dev_flags flags;
/*
* 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 AHC_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 AHC_DEV_PERIODIC_OTAG flag is set
* on this device.
*/
u_int commands_since_idle_or_otag;
#define AHC_OTAG_THRESH 500
};
/********************* 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.
*/
#define AHC_NSEG 128
/*
* Per-SCB OSM storage.
*/
struct scb_platform_data {
struct ahc_linux_device *dev;
dma_addr_t buf_busaddr;
uint32_t xfer_len;
uint32_t sense_resid; /* Auto-Sense residual */
};
/*
* 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.
*/
struct ahc_platform_data {
/*
* Fields accessed from interrupt context.
*/
struct scsi_target *starget[AHC_NUM_TARGETS];
spinlock_t spin_lock;
u_int qfrozen;
struct completion *eh_done;
struct Scsi_Host *host; /* pointer to scsi host */
#define AHC_LINUX_NOIRQ ((uint32_t)~0)
uint32_t irq; /* IRQ for this adapter */
uint32_t bios_address;
resource_size_t mem_busaddr; /* Mem Base Addr */
};
void ahc_delay(long);
/***************************** Low Level I/O **********************************/
uint8_t ahc_inb(struct ahc_softc * ahc, long port);
void ahc_outb(struct ahc_softc * ahc, long port, uint8_t val);
void ahc_outsb(struct ahc_softc * ahc, long port,
uint8_t *, int count);
void ahc_insb(struct ahc_softc * ahc, long port,
uint8_t *, int count);
/**************************** Initialization **********************************/
int ahc_linux_register_host(struct ahc_softc *,
struct scsi_host_template *);
/******************************** Locking *************************************/
/* Lock protecting internal data structures */
static inline void
ahc_lockinit(struct ahc_softc *ahc)
{
spin_lock_init(&ahc->platform_data->spin_lock);
}
static inline void
ahc_lock(struct ahc_softc *ahc, unsigned long *flags)
{
spin_lock_irqsave(&ahc->platform_data->spin_lock, *flags);
}
static inline void
ahc_unlock(struct ahc_softc *ahc, unsigned long *flags)
{
spin_unlock_irqrestore(&ahc->platform_data->spin_lock, *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
typedef enum
{
AHC_POWER_STATE_D0,
AHC_POWER_STATE_D1,
AHC_POWER_STATE_D2,
AHC_POWER_STATE_D3
} ahc_power_state;
/**************************** VL/EISA Routines ********************************/
#ifdef CONFIG_EISA
int ahc_linux_eisa_init(void);
void ahc_linux_eisa_exit(void);
int aic7770_map_registers(struct ahc_softc *ahc,
u_int port);
int aic7770_map_int(struct ahc_softc *ahc, u_int irq);
#else
static inline int ahc_linux_eisa_init(void) {
return -ENODEV;
}
static inline void ahc_linux_eisa_exit(void) {
}
#endif
/******************************* PCI Routines *********************************/
#ifdef CONFIG_PCI
int ahc_linux_pci_init(void);
void ahc_linux_pci_exit(void);
int ahc_pci_map_registers(struct ahc_softc *ahc);
int ahc_pci_map_int(struct ahc_softc *ahc);
uint32_t ahc_pci_read_config(ahc_dev_softc_t pci,
int reg, int width);
void ahc_pci_write_config(ahc_dev_softc_t pci,
int reg, uint32_t value,
int width);
static inline int ahc_get_pci_function(ahc_dev_softc_t);
static inline int
ahc_get_pci_function(ahc_dev_softc_t pci)
{
return (PCI_FUNC(pci->devfn));
}
static inline int ahc_get_pci_slot(ahc_dev_softc_t);
static inline int
ahc_get_pci_slot(ahc_dev_softc_t pci)
{
return (PCI_SLOT(pci->devfn));
}
static inline int ahc_get_pci_bus(ahc_dev_softc_t);
static inline int
ahc_get_pci_bus(ahc_dev_softc_t pci)
{
return (pci->bus->number);
}
#else
static inline int ahc_linux_pci_init(void) {
return 0;
}
static inline void ahc_linux_pci_exit(void) {
}
#endif
static inline void ahc_flush_device_writes(struct ahc_softc *);
static inline void
ahc_flush_device_writes(struct ahc_softc *ahc)
{
/* XXX Is this sufficient for all architectures??? */
ahc_inb(ahc, INTSTAT);
}
/**************************** Proc FS Support *********************************/
int ahc_proc_write_seeprom(struct Scsi_Host *, char *, int);
int ahc_linux_show_info(struct seq_file *, struct Scsi_Host *);
/*************************** Domain Validation ********************************/
/*********************** Transaction Access Wrappers *************************/
static inline
void ahc_cmd_set_transaction_status(struct scsi_cmnd *cmd, uint32_t status)
{
cmd->result &= ~(CAM_STATUS_MASK << 16);
cmd->result |= status << 16;
}
static inline
void ahc_set_transaction_status(struct scb *scb, uint32_t status)
{
ahc_cmd_set_transaction_status(scb->io_ctx,status);
}
static inline
void ahc_cmd_set_scsi_status(struct scsi_cmnd *cmd, uint32_t status)
{
cmd->result &= ~0xFFFF;
cmd->result |= status;
}
static inline
void ahc_set_scsi_status(struct scb *scb, uint32_t status)
{
ahc_cmd_set_scsi_status(scb->io_ctx, status);
}
static inline
uint32_t ahc_cmd_get_transaction_status(struct scsi_cmnd *cmd)
{
return ((cmd->result >> 16) & CAM_STATUS_MASK);
}
static inline
uint32_t ahc_get_transaction_status(struct scb *scb)
{
return (ahc_cmd_get_transaction_status(scb->io_ctx));
}
static inline
uint32_t ahc_cmd_get_scsi_status(struct scsi_cmnd *cmd)
{
return (cmd->result & 0xFFFF);
}
static inline
uint32_t ahc_get_scsi_status(struct scb *scb)
{
return (ahc_cmd_get_scsi_status(scb->io_ctx));
}
static inline
void ahc_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 ahc_get_transfer_length(struct scb *scb)
{
return (scb->platform_data->xfer_len);
}
static inline
int ahc_get_transfer_dir(struct scb *scb)
{
return (scb->io_ctx->sc_data_direction);
}
static inline
void ahc_set_residual(struct scb *scb, u_long resid)
{
scsi_set_resid(scb->io_ctx, resid);
}
static inline
void ahc_set_sense_residual(struct scb *scb, u_long resid)
{
scb->platform_data->sense_resid = resid;
}
static inline
u_long ahc_get_residual(struct scb *scb)
{
return scsi_get_resid(scb->io_ctx);
}
static inline
u_long ahc_get_sense_residual(struct scb *scb)
{
return (scb->platform_data->sense_resid);
}
static inline
int ahc_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
ahc_get_sense_bufsize(struct ahc_softc *ahc, struct scb *scb)
{
return (sizeof(struct scsi_sense_data));
}
static inline void
ahc_notify_xfer_settings_change(struct ahc_softc *ahc,
struct ahc_devinfo *devinfo)
{
/* Nothing to do here for linux */
}
static inline void
ahc_platform_scb_free(struct ahc_softc *ahc, struct scb *scb)
{
}
int ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg);
void ahc_platform_free(struct ahc_softc *ahc);
void ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb);
static inline void
ahc_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 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,
struct ahc_devinfo *devinfo, ahc_queue_alg);
int ahc_platform_abort_scbs(struct ahc_softc *ahc, int target,
char channel, int lun, u_int tag,
role_t role, uint32_t status);
irqreturn_t
ahc_linux_isr(int irq, void *dev_id);
void ahc_platform_flushwork(struct ahc_softc *ahc);
void ahc_done(struct ahc_softc*, struct scb*);
void ahc_send_async(struct ahc_softc *, char channel,
u_int target, u_int lun, ac_code);
void ahc_print_path(struct ahc_softc *, struct scb *);
#ifdef CONFIG_PCI
#define AHC_PCI_CONFIG 1
#else
#define AHC_PCI_CONFIG 0
#endif
#define bootverbose aic7xxx_verbose
extern u_int aic7xxx_verbose;
#endif /* _AIC7XXX_LINUX_H_ */
