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freebsd-skq/sys/dev/aic7xxx/aic79xx_osm.h
Scott Long 52c9ce25d8 Separate the parallel scsi knowledge out of the core of the XPT, and 
modularize it so that new transports can be created.

Add a transport for SATA

Add a periph+protocol layer for ATA

Add a driver for AHCI-compliant hardware.

Add a maxio field to CAM so that drivers can advertise their max
I/O capability.  Modify various drivers so that they are insulated
from the value of MAXPHYS.

The new ATA/SATA code supports AHCI-compliant hardware, and will override
the classic ATA driver if it is loaded as a module at boot time or compiled
into the kernel.  The stack now support NCQ (tagged queueing) for increased
performance on modern SATA drives.  It also supports port multipliers.

ATA drives are accessed via 'ada' device nodes.  ATAPI drives are
accessed via 'cd' device nodes.  They can all be enumerated and manipulated
via camcontrol, just like SCSI drives.  SCSI commands are not translated to
their ATA equivalents; ATA native commands are used throughout the entire
stack, including camcontrol.  See the camcontrol manpage for further
details.  Testing this code may require that you update your fstab, and
possibly modify your BIOS to enable AHCI functionality, if available.

This code is very experimental at the moment.  The userland ABI/API has
changed, so applications will need to be recompiled.  It may change
further in the near future.  The 'ada' device name may also change as
more infrastructure is completed in this project.  The goal is to
eventually put all CAM busses and devices until newbus, allowing for
interesting topology and management options.

Few functional changes will be seen with existing SCSI/SAS/FC drivers,
though the userland ABI has still changed.  In the future, transports
specific modules for SAS and FC may appear in order to better support
the topologies and capabilities of these technologies.

The modularization of CAM and the addition of the ATA/SATA modules is
meant to break CAM out of the mold of being specific to SCSI, letting it
grow to be a framework for arbitrary transports and protocols.  It also
allows drivers to be written to support discrete hardware without
jeopardizing the stability of non-related hardware.  While only an AHCI
driver is provided now, a Silicon Image driver is also in the works.
Drivers for ICH1-4, ICH5-6, PIIX, classic IDE, and any other hardware
is possible and encouraged.  Help with new transports is also encouraged.

Submitted by:	scottl, mav
Approved by:	re
2009-07-10 08:18:08 +00:00

279 lines
8.8 KiB
C
Raw Blame History

/*-
* FreeBSD platform specific driver option settings, data structures,
* function declarations and includes.
*
* Copyright (c) 1994-2001 Justin T. Gibbs.
* Copyright (c) 2001-2002 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. The name of the author may not 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 Public License ("GPL").
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, 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 DAMAGE.
*
* $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/aic79xx_osm.h#23 $
*
* $FreeBSD$
*/
#ifndef _AIC79XX_FREEBSD_H_
#define _AIC79XX_FREEBSD_H_
#include <opt_aic79xx.h> /* for config options */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h> /* For device_t */
#if __FreeBSD_version >= 500000
#include <sys/endian.h>
#endif
#include <sys/eventhandler.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/queue.h>
#define AIC_PCI_CONFIG 1
#include <machine/bus.h>
#include <machine/endian.h>
#include <machine/resource.h>
#include <sys/rman.h>
#if __FreeBSD_version >= 500000
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#else
#include <pci/pcireg.h>
#include <pci/pcivar.h>
#endif
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_debug.h>
#include <cam/cam_sim.h>
#include <cam/cam_xpt_sim.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_message.h>
#include <cam/scsi/scsi_iu.h>
/****************************** Platform Macros *******************************/
#define SIM_IS_SCSIBUS_B(ahd, sim) \
(0)
#define SIM_CHANNEL(ahd, sim) \
('A')
#define SIM_SCSI_ID(ahd, sim) \
(ahd->our_id)
#define SIM_PATH(ahd, sim) \
(ahd->platform_data->path)
#define BUILD_SCSIID(ahd, sim, target_id, our_id) \
((((target_id) << TID_SHIFT) & TID) | (our_id))
#define SCB_GET_SIM(ahd, scb) \
((ahd)->platform_data->sim)
#ifndef offsetof
#define offsetof(type, member) ((size_t)(&((type *)0)->member))
#endif
/************************ Tunable Driver Parameters **************************/
/*
* The number of dma segments supported. The sequencer can handle any number
* of physically contiguous S/G entrys. To reduce the driver's memory
* consumption, we limit the number supported to be sufficient to handle
* the largest mapping supported by the the legacy kernel MAXPHYS setting of
* 128K. This can be increased once some testing is done. Assuming the
* transfer is as fragmented as possible and unaligned, this turns out to
* be the number of paged sized transfers in MAXPHYS plus an extra element
* to handle any unaligned residual. The sequencer fetches SG elements
* in cacheline sized chucks, so make the number per-transaction an even
* multiple of 16 which should align us on even the largest of cacheline
* boundaries.
*/
#define AHD_MAXPHYS (128 * 1024)
#define AHD_NSEG (roundup(btoc(AHD_MAXPHYS) + 1, 16))
/* This driver supports target mode */
#ifdef NOT_YET
#define AHD_TARGET_MODE 1
#endif
/************************** Softc/SCB Platform Data ***************************/
struct ahd_platform_data {
/*
* Hooks into the XPT.
*/
struct cam_sim *sim;
struct cam_path *path;
int regs_res_type[2];
int regs_res_id[2];
int irq_res_type;
struct resource *regs[2];
struct resource *irq;
void *ih;
eventhandler_tag eh;
struct proc *recovery_thread;
struct mtx mtx;
};
struct scb_platform_data {
};
/***************************** Core Includes **********************************/
#ifdef AHD_REG_PRETTY_PRINT
#define AIC_DEBUG_REGISTERS 1
#else
#define AIC_DEBUG_REGISTERS 0
#endif
#define AIC_CORE_INCLUDE <dev/aic7xxx/aic79xx.h>
#define AIC_LIB_PREFIX ahd
#define AIC_CONST_PREFIX AHD
#include <dev/aic7xxx/aic_osm_lib.h>
/*************************** Device Access ************************************/
#define ahd_inb(ahd, port) \
bus_space_read_1((ahd)->tags[(port) >> 8], \
(ahd)->bshs[(port) >> 8], (port) & 0xFF)
#define ahd_outb(ahd, port, value) \
bus_space_write_1((ahd)->tags[(port) >> 8], \
(ahd)->bshs[(port) >> 8], (port) & 0xFF, value)
#define ahd_inw_atomic(ahd, port) \
aic_le16toh(bus_space_read_2((ahd)->tags[(port) >> 8], \
(ahd)->bshs[(port) >> 8], (port) & 0xFF))
#define ahd_outw_atomic(ahd, port, value) \
bus_space_write_2((ahd)->tags[(port) >> 8], \
(ahd)->bshs[(port) >> 8], \
(port & 0xFF), aic_htole16(value))
#define ahd_outsb(ahd, port, valp, count) \
bus_space_write_multi_1((ahd)->tags[(port) >> 8], \
(ahd)->bshs[(port) >> 8], \
(port & 0xFF), valp, count)
#define ahd_insb(ahd, port, valp, count) \
bus_space_read_multi_1((ahd)->tags[(port) >> 8], \
(ahd)->bshs[(port) >> 8], \
(port & 0xFF), valp, count)
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);
}
/**************************** Locking Primitives ******************************/
/* Lock protecting internal data structures */
static __inline void ahd_lockinit(struct ahd_softc *);
static __inline void ahd_lock(struct ahd_softc *);
static __inline void ahd_unlock(struct ahd_softc *);
static __inline void
ahd_lockinit(struct ahd_softc *ahd)
{
mtx_init(&ahd->platform_data->mtx, "ahd_lock", NULL, MTX_DEF);
}
static __inline void
ahd_lock(struct ahd_softc *ahd)
{
mtx_lock(&ahd->platform_data->mtx);
}
static __inline void
ahd_unlock(struct ahd_softc *ahd)
{
mtx_unlock(&ahd->platform_data->mtx);
}
/********************************** PCI ***************************************/
int ahd_pci_map_registers(struct ahd_softc *ahd);
int ahd_pci_map_int(struct ahd_softc *ahd);
/************************** Transaction Operations ****************************/
static __inline void aic_freeze_simq(struct aic_softc*);
static __inline void aic_release_simq(struct aic_softc*);
static __inline void
aic_freeze_simq(struct aic_softc *aic)
{
xpt_freeze_simq(aic->platform_data->sim, /*count*/1);
}
static __inline void
aic_release_simq(struct aic_softc *aic)
{
xpt_release_simq(aic->platform_data->sim, /*run queue*/TRUE);
}
/********************************* Debug **************************************/
static __inline void ahd_print_path(struct ahd_softc *, struct scb *);
static __inline void ahd_platform_dump_card_state(struct ahd_softc *ahd);
static __inline void
ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
{
xpt_print_path(scb->io_ctx->ccb_h.path);
}
static __inline void
ahd_platform_dump_card_state(struct ahd_softc *ahd)
{
/* Nothing to do here for FreeBSD */
}
/**************************** Transfer Settings *******************************/
void ahd_notify_xfer_settings_change(struct ahd_softc *,
struct ahd_devinfo *);
void ahd_platform_set_tags(struct ahd_softc *, struct ahd_devinfo *,
int /*enable*/);
/************************* Initialization/Teardown ****************************/
int ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg);
void ahd_platform_free(struct ahd_softc *ahd);
int ahd_map_int(struct ahd_softc *ahd);
int ahd_attach(struct ahd_softc *);
int ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd);
int ahd_detach(device_t);
#define ahd_platform_init(arg)
/****************************** Interrupts ************************************/
void ahd_platform_intr(void *);
static __inline void ahd_platform_flushwork(struct ahd_softc *ahd);
static __inline void
ahd_platform_flushwork(struct ahd_softc *ahd)
{
}
/************************ Misc Function Declarations **************************/
void ahd_done(struct ahd_softc *ahd, struct scb *scb);
void ahd_send_async(struct ahd_softc *, char /*channel*/,
u_int /*target*/, u_int /*lun*/, ac_code, void *arg);
#endif /* _AIC79XX_FREEBSD_H_ */
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