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freebsd/sys/dev/aic7xxx/aic7xxx_inline.h
Justin T. Gibbs b3b25f2cbf ahc_eisa.c: 
ahc_pci.c:
ahd_pci.c:
aic7xxx.c:
aic79xx.c:
aic_osm_lib.c:
aic_osm_lib.h:
	Use common OSM routines from aic_osm_lib for bus dma operations,
	delay routines, accessing CCBs, byte swapping, etc.

aic7xxx_pci.c:
	Provide a better description for the 2915/30LP on attach.

aic7xxx.c:
aic79xx.c:
aic7770.c:
aic79xx_pci.c:
aic7xxx_pci.c:
aic7xxx_93cx6.c:
	Move FBSDID behind an ifdef so that these core files will
	still compile under other OSes.

aic79xx.h:
aic79xx_pci.c:
aic79xx.seq:
	To speed up non-packetized CDB delivery in Rev B, all CDB
	acks are "released" to the output sync as soon as the
	command phase starts.  There is only one problem with this
	approach.  If the target changes phase before all data are
	sent, we have left over acks that can go out on the bus in
	a data phase.  Due to other chip contraints, this only
	happens if the target goes to data-in, but if the acks go
	out before we can test SDONE, we'll think that the transfer
	has completed successfully.  Work around this by taking
	advantage of the 400ns or 800ns dead time between command
	phase and the REQ of the new phase.  If the transfer has
	completed successfully, SCSIEN should fall *long* before we
	see a phase change.  We thus treat any phasemiss that
	occurs before SCSIEN falls as an incomplete transfer.

	aic79xx.h:
		Add the AHD_FAST_CDB_DELIVERY feature.

	aic79xx_pci.c:
		Set AHD_FAST_CDB_DELIVERY for all Rev. B parts.

	aic79xx.seq:
		Test for PHASEMIS in the command phase for
		all AHD_FAST_CDB_DELIVERY controlelrs.

ahd_pci.c:
ahc_pci.c:
aic7xxx.h:
aic79xx.h:
	Move definition of controller BAR offsets to core header files.

aic7xxx.c:
aic79xx.c:
	In the softc free routine, leave removal of a softc from the
	global list of softcs to the OSM (the caller of this routine).
	This allows us to avoid holding the softc list_lock during device
	destruction where we may have to sleep waiting for our recovery
	thread to halt.

ahc_pci.c:
	Use ahc_pci_test_register access to validate I/O mapped in
	addition to the tests already performed for memory mapped
	access.

	Remove unused ahc_power_state_change() function.  The PCI
	layer in both 4.X and 5.X now offer this functionality.

ahd_pci.c:
	Remove reduntant definition of controller BAR offsets.  These
	are also defined in aic79xx.h.

	Remove unused ahd_power_state_change() function.  The PCI
	layer in both 4.X and 5.X now offer this functionality.

aic7xxx.c:
aic79xx.c:
aic79xx.h:
aic7xxx.h:
aic7xxx_osm.c:
aic79xx_osm.c:
	Move timeout handling to the driver cores.  In the case
	of the aic79xx driver, the algorithm has been enhanced
	to try target resets before performing a bus reset.  For
	the aic7xxx driver, the algorithm is unchanged.  Although
	the drivers do not currently sleep during recovery (recovery
	is timeout driven), the cores do expect all processing to
	be performed via a recovery thread.  Our timeout handlers
	are now little stubs that wakeup the recovery thread.

aic79xx.c:
aic79xx.h:
aic79xx_inline.h:
	Change shared_data allocation to use a map_node so
	that the sentinel hscb can use this map node in
	ahd_swap_with_next_hscb.  This routine now swaps
	the hscb_map pointer in additon to the hscb
	contents so that any sync operations occur on
	the correct map.

	physaddr -> busaddr

	Pointed out by: Jason Thorpe <thorpej@wasabisystems.com>

aic79xx.c:
	Make more use of the in/out/w/l/q macros for accessing
	byte registers in the chip.

	Correct some issues in the ahd_flush_qoutfifo() routine.
	    o Run the qoutfifo only once the command channel
	      DMA engine has been halted.  This closes a window
	      where we might have missed some entries.
	    o Change ahd_run_data_fifo() to not loop to completion.
	      If we happen to start on the wrong FIFO and the other
	      FIFO has a snapshot savepointers, we might deadlock.
	      This required our delay between FIFO tests to be
	      moved to the ahd_flush_qoutfifo() routine.
	    o Update/add comments.
	    o Remove spurious test for COMPLETE_DMA list being empty
	      when completing transactions from the GSFIFO with
	      residuals.  The SCB must be put on the COMPLETE_DMA
	      scb list unconditionally.
	    o When halting command channel DMA activity, we must
	      disable the DMA channel in all cases but an update
	      of the QOUTFIFO.  The latter case is required so
	      that the sequencer will update its position in the
	      QOUTFIFO.  Previously, we left the channel enabled
	      for all "push" DMAs.  This left us vulnerable to
	      the sequencer handling an SCB push long after that
	      SCB was already processed manually by this routine.
	    o Correct the polarity of tests involving
	      ahd_scb_active_in_fifo().  This routine returns
	      non-zero for true.

	Return to processing bad status completions through
	the qoutfifo.  This reduces the time that the sequencer
	is kept paused when handling transactions with bad
	status or underruns.

	When waiting for the controller to quiece selections,
	add a delay to our loop.  Otherwise we may fail to wait
	long enough for the sequencer to comply.

	On H2A4 hardware, use the slow slewrate for non-paced
	transfers.  This mirrors what the Adaptec Windows
	drivers do.

	On the Rev B. only slow down the CRC timing for
	older U160 devices that might need the slower timing.
	We define "older" as devices that do not support
	packetized protocol.

	Wait up to 5000 * 5us for the SEEPROM to become unbusy.
	Write ops seem to take much longer than read ops.

aic79xx.seq:
	For controllers with the FAINT_LED bug, turn the diagnostic
	led feature on during selection and reselection.  This covers
	the non-packetized case.  The LED will be disabled for
	non-packetized transfers once we return to the top level idle
	loop.  Add more comments about the busy LED workaround.

	Extend a critical section around the entire
	command channel idle loop process.  Previously
	the portion of this handler that directly manipulated
	the linked list of completed SCBs was not protected.
	This is the likely cause of the recent reports of
	commands being completed twice by the driver.

	Extend critical sections across the test for,
	and the longjump to, longjump routines.  This
	prevents the firmware from trying to jump to
	a longjmp handler that was just cleared by the
	host.

	Improve the locations of several critical section
	begin and end points.  Typically these changes
	remove instructions that did not need to be
	inside a critical section.

	Close the "busfree after selection, but before busfree
	interrupts can be enabled" race to just a single sequencer
	instruction.  We now test the BSY line explicitly before
	clearing the busfree status and enabling the busfree
	interrupt.

	Close a race condition in the processing of HS_MAILBOX
	updates.  We now clear the "updated" status before the
	copy.  This ensures that we don't accidentally clear
	the status incorrectly when the host sneaks in an update
	just after our last copy, but before we clear the status.
	This race has never been observed.

	Don't re-enable SCSIEN if we lose the race to disable SCSIEN
	in our interrupt handler's workaround for the RevA data-valid
	too early issue.

aic79xx_inline.h:
	Add comments indicating that the order in which bytes are
	read or written in ahd_inw and ahd_outw is important.  This
	allows us to use these inlines when accessing registers with
	side-effects.

aic79xx_pci.c:
	The 29320 and the 29320B are 7902 not 7901 based products.
	Correct the driver banner.

aic7xxx.h:
	Enable the use of the auto-access pause feature
	on the aic7870 and aic7880.  It was disabled due
	to an oversight.

aic7xxx.reg:
	Move TARG_IMMEDIATE_SCB to alias LAST_MSG to
	avoid leaving garbage in MWI_RESIDUAL.  This
	prevents spurious overflows whn operating target
	mode on controllers that require the MWI_RESIDUAL
	work-around.

aic7xxx.seq:
	AHC_TMODE_WIDEODD_BUG is a bug, not a softc flag.
	Reference the correct softc field when testing
	for its presence.

	Set the NOT_IDENTIFIED and NO_CDB_SENT bits
	in SEQ_FLAGS to indicate that the nexus is
	invalid in await busfree.

aic7xxx_93cx6.c:
	Add support for the C56/C66 versions of the EWEN and EWDS
	commands.

aic7xxx.c:
aic7xxx_pci.c:
	Move test for the validity of left over BIOS data
	to ahc_test_register_access().  This guarantees that
	any left over CHIPRST value is not clobbered by our
	register access test and lost to the test that was
	in ahc_reset.
2003-12-17 00:02:10 +00:00

650 lines
19 KiB
C
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/*
* Inline routines shareable across OS platforms.
*
* Copyright (c) 1994-2001 Justin T. Gibbs.
* 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/aic7xxx/aic7xxx_inline.h#47 $
*
* $FreeBSD$
*/
#ifndef _AIC7XXX_INLINE_H_
#define _AIC7XXX_INLINE_H_
/************************* Sequencer Execution Control ************************/
static __inline void ahc_pause_bug_fix(struct ahc_softc *ahc);
static __inline int ahc_is_paused(struct ahc_softc *ahc);
static __inline void ahc_pause(struct ahc_softc *ahc);
static __inline void ahc_unpause(struct ahc_softc *ahc);
/*
* Work around any chip bugs related to halting sequencer execution.
* On Ultra2 controllers, we must clear the CIOBUS stretch signal by
* reading a register that will set this signal and deassert it.
* Without this workaround, if the chip is paused, by an interrupt or
* manual pause while accessing scb ram, accesses to certain registers
* will hang the system (infinite pci retries).
*/
static __inline void
ahc_pause_bug_fix(struct ahc_softc *ahc)
{
if ((ahc->features & AHC_ULTRA2) != 0)
(void)ahc_inb(ahc, CCSCBCTL);
}
/*
* Determine whether the sequencer has halted code execution.
* Returns non-zero status if the sequencer is stopped.
*/
static __inline int
ahc_is_paused(struct ahc_softc *ahc)
{
return ((ahc_inb(ahc, HCNTRL) & PAUSE) != 0);
}
/*
* Request that the sequencer stop and wait, indefinitely, for it
* to stop. The sequencer will only acknowledge that it is paused
* once it has reached an instruction boundary and PAUSEDIS is
* cleared in the SEQCTL register. The sequencer may use PAUSEDIS
* for critical sections.
*/
static __inline void
ahc_pause(struct ahc_softc *ahc)
{
ahc_outb(ahc, HCNTRL, ahc->pause);
/*
* Since the sequencer can disable pausing in a critical section, we
* must loop until it actually stops.
*/
while (ahc_is_paused(ahc) == 0)
;
ahc_pause_bug_fix(ahc);
}
/*
* Allow the sequencer to continue program execution.
* We check here to ensure that no additional interrupt
* sources that would cause the sequencer to halt have been
* asserted. If, for example, a SCSI bus reset is detected
* while we are fielding a different, pausing, interrupt type,
* we don't want to release the sequencer before going back
* into our interrupt handler and dealing with this new
* condition.
*/
static __inline void
ahc_unpause(struct ahc_softc *ahc)
{
if ((ahc_inb(ahc, INTSTAT) & (SCSIINT | SEQINT | BRKADRINT)) == 0)
ahc_outb(ahc, HCNTRL, ahc->unpause);
}
/*********************** Untagged Transaction Routines ************************/
static __inline void ahc_freeze_untagged_queues(struct ahc_softc *ahc);
static __inline void ahc_release_untagged_queues(struct ahc_softc *ahc);
/*
* Block our completion routine from starting the next untagged
* transaction for this target or target lun.
*/
static __inline void
ahc_freeze_untagged_queues(struct ahc_softc *ahc)
{
if ((ahc->flags & AHC_SCB_BTT) == 0)
ahc->untagged_queue_lock++;
}
/*
* Allow the next untagged transaction for this target or target lun
* to be executed. We use a counting semaphore to allow the lock
* to be acquired recursively. Once the count drops to zero, the
* transaction queues will be run.
*/
static __inline void
ahc_release_untagged_queues(struct ahc_softc *ahc)
{
if ((ahc->flags & AHC_SCB_BTT) == 0) {
ahc->untagged_queue_lock--;
if (ahc->untagged_queue_lock == 0)
ahc_run_untagged_queues(ahc);
}
}
/************************** Memory mapping routines ***************************/
static __inline struct ahc_dma_seg *
ahc_sg_bus_to_virt(struct scb *scb,
uint32_t sg_busaddr);
static __inline uint32_t
ahc_sg_virt_to_bus(struct scb *scb,
struct ahc_dma_seg *sg);
static __inline uint32_t
ahc_hscb_busaddr(struct ahc_softc *ahc, u_int index);
static __inline void ahc_sync_scb(struct ahc_softc *ahc,
struct scb *scb, int op);
static __inline void ahc_sync_sglist(struct ahc_softc *ahc,
struct scb *scb, int op);
static __inline uint32_t
ahc_targetcmd_offset(struct ahc_softc *ahc,
u_int index);
static __inline struct ahc_dma_seg *
ahc_sg_bus_to_virt(struct scb *scb, uint32_t sg_busaddr)
{
int sg_index;
sg_index = (sg_busaddr - scb->sg_list_phys)/sizeof(struct ahc_dma_seg);
/* sg_list_phys points to entry 1, not 0 */
sg_index++;
return (&scb->sg_list[sg_index]);
}
static __inline uint32_t
ahc_sg_virt_to_bus(struct scb *scb, struct ahc_dma_seg *sg)
{
int sg_index;
/* sg_list_phys points to entry 1, not 0 */
sg_index = sg - &scb->sg_list[1];
return (scb->sg_list_phys + (sg_index * sizeof(*scb->sg_list)));
}
static __inline uint32_t
ahc_hscb_busaddr(struct ahc_softc *ahc, u_int index)
{
return (ahc->scb_data->hscb_busaddr
+ (sizeof(struct hardware_scb) * index));
}
static __inline void
ahc_sync_scb(struct ahc_softc *ahc, struct scb *scb, int op)
{
aic_dmamap_sync(ahc, ahc->scb_data->hscb_dmat,
ahc->scb_data->hscb_dmamap,
/*offset*/(scb->hscb - ahc->hscbs) * sizeof(*scb->hscb),
/*len*/sizeof(*scb->hscb), op);
}
static __inline void
ahc_sync_sglist(struct ahc_softc *ahc, struct scb *scb, int op)
{
if (scb->sg_count == 0)
return;
aic_dmamap_sync(ahc, ahc->scb_data->sg_dmat, scb->sg_map->sg_dmamap,
/*offset*/(scb->sg_list - scb->sg_map->sg_vaddr)
* sizeof(struct ahc_dma_seg),
/*len*/sizeof(struct ahc_dma_seg) * scb->sg_count, op);
}
static __inline uint32_t
ahc_targetcmd_offset(struct ahc_softc *ahc, u_int index)
{
return (((uint8_t *)&ahc->targetcmds[index]) - ahc->qoutfifo);
}
/******************************** Debugging ***********************************/
static __inline char *ahc_name(struct ahc_softc *ahc);
static __inline char *
ahc_name(struct ahc_softc *ahc)
{
return (ahc->name);
}
/*********************** Miscelaneous Support Functions ***********************/
static __inline void ahc_update_residual(struct ahc_softc *ahc,
struct scb *scb);
static __inline struct ahc_initiator_tinfo *
ahc_fetch_transinfo(struct ahc_softc *ahc,
char channel, u_int our_id,
u_int remote_id,
struct ahc_tmode_tstate **tstate);
static __inline uint16_t
ahc_inw(struct ahc_softc *ahc, u_int port);
static __inline void ahc_outw(struct ahc_softc *ahc, u_int port,
u_int value);
static __inline uint32_t
ahc_inl(struct ahc_softc *ahc, u_int port);
static __inline void ahc_outl(struct ahc_softc *ahc, u_int port,
uint32_t value);
static __inline uint64_t
ahc_inq(struct ahc_softc *ahc, u_int port);
static __inline void ahc_outq(struct ahc_softc *ahc, u_int port,
uint64_t value);
static __inline struct scb*
ahc_get_scb(struct ahc_softc *ahc);
static __inline void ahc_free_scb(struct ahc_softc *ahc, struct scb *scb);
static __inline void ahc_swap_with_next_hscb(struct ahc_softc *ahc,
struct scb *scb);
static __inline void ahc_queue_scb(struct ahc_softc *ahc, struct scb *scb);
static __inline struct scsi_sense_data *
ahc_get_sense_buf(struct ahc_softc *ahc,
struct scb *scb);
static __inline uint32_t
ahc_get_sense_bufaddr(struct ahc_softc *ahc,
struct scb *scb);
/*
* Determine whether the sequencer reported a residual
* for this SCB/transaction.
*/
static __inline void
ahc_update_residual(struct ahc_softc *ahc, struct scb *scb)
{
uint32_t sgptr;
sgptr = aic_le32toh(scb->hscb->sgptr);
if ((sgptr & SG_RESID_VALID) != 0)
ahc_calc_residual(ahc, scb);
}
/*
* Return pointers to the transfer negotiation information
* for the specified our_id/remote_id pair.
*/
static __inline struct ahc_initiator_tinfo *
ahc_fetch_transinfo(struct ahc_softc *ahc, char channel, u_int our_id,
u_int remote_id, struct ahc_tmode_tstate **tstate)
{
/*
* Transfer data structures are stored from the perspective
* of the target role. Since the parameters for a connection
* in the initiator role to a given target are the same as
* when the roles are reversed, we pretend we are the target.
*/
if (channel == 'B')
our_id += 8;
*tstate = ahc->enabled_targets[our_id];
return (&(*tstate)->transinfo[remote_id]);
}
static __inline uint16_t
ahc_inw(struct ahc_softc *ahc, u_int port)
{
return ((ahc_inb(ahc, port+1) << 8) | ahc_inb(ahc, port));
}
static __inline void
ahc_outw(struct ahc_softc *ahc, u_int port, u_int value)
{
ahc_outb(ahc, port, value & 0xFF);
ahc_outb(ahc, port+1, (value >> 8) & 0xFF);
}
static __inline uint32_t
ahc_inl(struct ahc_softc *ahc, u_int port)
{
return ((ahc_inb(ahc, port))
| (ahc_inb(ahc, port+1) << 8)
| (ahc_inb(ahc, port+2) << 16)
| (ahc_inb(ahc, port+3) << 24));
}
static __inline void
ahc_outl(struct ahc_softc *ahc, u_int port, uint32_t value)
{
ahc_outb(ahc, port, (value) & 0xFF);
ahc_outb(ahc, port+1, ((value) >> 8) & 0xFF);
ahc_outb(ahc, port+2, ((value) >> 16) & 0xFF);
ahc_outb(ahc, port+3, ((value) >> 24) & 0xFF);
}
static __inline uint64_t
ahc_inq(struct ahc_softc *ahc, u_int port)
{
return ((ahc_inb(ahc, port))
| (ahc_inb(ahc, port+1) << 8)
| (ahc_inb(ahc, port+2) << 16)
| (ahc_inb(ahc, port+3) << 24)
| (((uint64_t)ahc_inb(ahc, port+4)) << 32)
| (((uint64_t)ahc_inb(ahc, port+5)) << 40)
| (((uint64_t)ahc_inb(ahc, port+6)) << 48)
| (((uint64_t)ahc_inb(ahc, port+7)) << 56));
}
static __inline void
ahc_outq(struct ahc_softc *ahc, u_int port, uint64_t value)
{
ahc_outb(ahc, port, value & 0xFF);
ahc_outb(ahc, port+1, (value >> 8) & 0xFF);
ahc_outb(ahc, port+2, (value >> 16) & 0xFF);
ahc_outb(ahc, port+3, (value >> 24) & 0xFF);
ahc_outb(ahc, port+4, (value >> 32) & 0xFF);
ahc_outb(ahc, port+5, (value >> 40) & 0xFF);
ahc_outb(ahc, port+6, (value >> 48) & 0xFF);
ahc_outb(ahc, port+7, (value >> 56) & 0xFF);
}
/*
* Get a free scb. If there are none, see if we can allocate a new SCB.
*/
static __inline struct scb *
ahc_get_scb(struct ahc_softc *ahc)
{
struct scb *scb;
if ((scb = SLIST_FIRST(&ahc->scb_data->free_scbs)) == NULL) {
ahc_alloc_scbs(ahc);
scb = SLIST_FIRST(&ahc->scb_data->free_scbs);
if (scb == NULL)
return (NULL);
}
SLIST_REMOVE_HEAD(&ahc->scb_data->free_scbs, links.sle);
return (scb);
}
/*
* Return an SCB resource to the free list.
*/
static __inline void
ahc_free_scb(struct ahc_softc *ahc, struct scb *scb)
{
struct hardware_scb *hscb;
hscb = scb->hscb;
/* Clean up for the next user */
ahc->scb_data->scbindex[hscb->tag] = NULL;
scb->flags = SCB_FLAG_NONE;
hscb->control = 0;
SLIST_INSERT_HEAD(&ahc->scb_data->free_scbs, scb, links.sle);
/* Notify the OSM that a resource is now available. */
aic_platform_scb_free(ahc, scb);
}
static __inline struct scb *
ahc_lookup_scb(struct ahc_softc *ahc, u_int tag)
{
struct scb* scb;
scb = ahc->scb_data->scbindex[tag];
if (scb != NULL)
ahc_sync_scb(ahc, scb,
BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
return (scb);
}
static __inline void
ahc_swap_with_next_hscb(struct ahc_softc *ahc, struct scb *scb)
{
struct hardware_scb *q_hscb;
u_int saved_tag;
/*
* Our queuing method is a bit tricky. The card
* knows in advance which HSCB to download, and we
* can't disappoint it. To achieve this, the next
* SCB to download is saved off in ahc->next_queued_scb.
* When we are called to queue "an arbitrary scb",
* we copy the contents of the incoming HSCB to the one
* the sequencer knows about, swap HSCB pointers and
* finally assign the SCB to the tag indexed location
* in the scb_array. This makes sure that we can still
* locate the correct SCB by SCB_TAG.
*/
q_hscb = ahc->next_queued_scb->hscb;
saved_tag = q_hscb->tag;
memcpy(q_hscb, scb->hscb, sizeof(*scb->hscb));
if ((scb->flags & SCB_CDB32_PTR) != 0) {
q_hscb->shared_data.cdb_ptr =
aic_htole32(ahc_hscb_busaddr(ahc, q_hscb->tag)
+ offsetof(struct hardware_scb, cdb32));
}
q_hscb->tag = saved_tag;
q_hscb->next = scb->hscb->tag;
/* Now swap HSCB pointers. */
ahc->next_queued_scb->hscb = scb->hscb;
scb->hscb = q_hscb;
/* Now define the mapping from tag to SCB in the scbindex */
ahc->scb_data->scbindex[scb->hscb->tag] = scb;
}
/*
* Tell the sequencer about a new transaction to execute.
*/
static __inline void
ahc_queue_scb(struct ahc_softc *ahc, struct scb *scb)
{
ahc_swap_with_next_hscb(ahc, scb);
if (scb->hscb->tag == SCB_LIST_NULL
|| scb->hscb->next == SCB_LIST_NULL)
panic("Attempt to queue invalid SCB tag %x:%x\n",
scb->hscb->tag, scb->hscb->next);
/*
* Setup data "oddness".
*/
scb->hscb->lun &= LID;
if (aic_get_transfer_length(scb) & 0x1)
scb->hscb->lun |= SCB_XFERLEN_ODD;
/*
* Keep a history of SCBs we've downloaded in the qinfifo.
*/
ahc->qinfifo[ahc->qinfifonext++] = scb->hscb->tag;
/*
* Make sure our data is consistent from the
* perspective of the adapter.
*/
ahc_sync_scb(ahc, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
/* Tell the adapter about the newly queued SCB */
if ((ahc->features & AHC_QUEUE_REGS) != 0) {
ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext);
} else {
if ((ahc->features & AHC_AUTOPAUSE) == 0)
ahc_pause(ahc);
ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext);
if ((ahc->features & AHC_AUTOPAUSE) == 0)
ahc_unpause(ahc);
}
}
static __inline struct scsi_sense_data *
ahc_get_sense_buf(struct ahc_softc *ahc, struct scb *scb)
{
int offset;
offset = scb - ahc->scb_data->scbarray;
return (&ahc->scb_data->sense[offset]);
}
static __inline uint32_t
ahc_get_sense_bufaddr(struct ahc_softc *ahc, struct scb *scb)
{
int offset;
offset = scb - ahc->scb_data->scbarray;
return (ahc->scb_data->sense_busaddr
+ (offset * sizeof(struct scsi_sense_data)));
}
/************************** Interrupt Processing ******************************/
static __inline void ahc_sync_qoutfifo(struct ahc_softc *ahc, int op);
static __inline void ahc_sync_tqinfifo(struct ahc_softc *ahc, int op);
static __inline u_int ahc_check_cmdcmpltqueues(struct ahc_softc *ahc);
static __inline int ahc_intr(struct ahc_softc *ahc);
static __inline void
ahc_sync_qoutfifo(struct ahc_softc *ahc, int op)
{
aic_dmamap_sync(ahc, ahc->shared_data_dmat, ahc->shared_data_dmamap,
/*offset*/0, /*len*/256, op);
}
static __inline void
ahc_sync_tqinfifo(struct ahc_softc *ahc, int op)
{
#ifdef AHC_TARGET_MODE
if ((ahc->flags & AHC_TARGETROLE) != 0) {
aic_dmamap_sync(ahc, ahc->shared_data_dmat,
ahc->shared_data_dmamap,
ahc_targetcmd_offset(ahc, 0),
sizeof(struct target_cmd) * AHC_TMODE_CMDS,
op);
}
#endif
}
/*
* See if the firmware has posted any completed commands
* into our in-core command complete fifos.
*/
#define AHC_RUN_QOUTFIFO 0x1
#define AHC_RUN_TQINFIFO 0x2
static __inline u_int
ahc_check_cmdcmpltqueues(struct ahc_softc *ahc)
{
u_int retval;
retval = 0;
aic_dmamap_sync(ahc, ahc->shared_data_dmat, ahc->shared_data_dmamap,
/*offset*/ahc->qoutfifonext, /*len*/1,
BUS_DMASYNC_POSTREAD);
if (ahc->qoutfifo[ahc->qoutfifonext] != SCB_LIST_NULL)
retval |= AHC_RUN_QOUTFIFO;
#ifdef AHC_TARGET_MODE
if ((ahc->flags & AHC_TARGETROLE) != 0
&& (ahc->flags & AHC_TQINFIFO_BLOCKED) == 0) {
aic_dmamap_sync(ahc, ahc->shared_data_dmat,
ahc->shared_data_dmamap,
ahc_targetcmd_offset(ahc, ahc->tqinfifofnext),
/*len*/sizeof(struct target_cmd),
BUS_DMASYNC_POSTREAD);
if (ahc->targetcmds[ahc->tqinfifonext].cmd_valid != 0)
retval |= AHC_RUN_TQINFIFO;
}
#endif
return (retval);
}
/*
* Catch an interrupt from the adapter
*/
static __inline int
ahc_intr(struct ahc_softc *ahc)
{
u_int intstat;
if ((ahc->pause & INTEN) == 0) {
/*
* Our interrupt is not enabled on the chip
* and may be disabled for re-entrancy reasons,
* so just return. This is likely just a shared
* interrupt.
*/
return (0);
}
/*
* Instead of directly reading the interrupt status register,
* infer the cause of the interrupt by checking our in-core
* completion queues. This avoids a costly PCI bus read in
* most cases.
*/
if ((ahc->flags & (AHC_ALL_INTERRUPTS|AHC_EDGE_INTERRUPT)) == 0
&& (ahc_check_cmdcmpltqueues(ahc) != 0))
intstat = CMDCMPLT;
else {
intstat = ahc_inb(ahc, INTSTAT);
}
if ((intstat & INT_PEND) == 0) {
#if AIC_PCI_CONFIG > 0
if (ahc->unsolicited_ints > 500) {
ahc->unsolicited_ints = 0;
if ((ahc->chip & AHC_PCI) != 0
&& (ahc_inb(ahc, ERROR) & PCIERRSTAT) != 0)
ahc->bus_intr(ahc);
}
#endif
ahc->unsolicited_ints++;
return (0);
}
ahc->unsolicited_ints = 0;
if (intstat & CMDCMPLT) {
ahc_outb(ahc, CLRINT, CLRCMDINT);
/*
* Ensure that the chip sees that we've cleared
* this interrupt before we walk the output fifo.
* Otherwise, we may, due to posted bus writes,
* clear the interrupt after we finish the scan,
* and after the sequencer has added new entries
* and asserted the interrupt again.
*/
ahc_flush_device_writes(ahc);
ahc_run_qoutfifo(ahc);
#ifdef AHC_TARGET_MODE
if ((ahc->flags & AHC_TARGETROLE) != 0)
ahc_run_tqinfifo(ahc, /*paused*/FALSE);
#endif
}
/*
* Handle statuses that may invalidate our cached
* copy of INTSTAT separately.
*/
if (intstat == 0xFF && (ahc->features & AHC_REMOVABLE) != 0) {
/* Hot eject. Do nothing */
} else if (intstat & BRKADRINT) {
ahc_handle_brkadrint(ahc);
} else if ((intstat & (SEQINT|SCSIINT)) != 0) {
ahc_pause_bug_fix(ahc);
if ((intstat & SEQINT) != 0)
ahc_handle_seqint(ahc, intstat);
if ((intstat & SCSIINT) != 0)
ahc_handle_scsiint(ahc, intstat);
}
return (1);
}
#endif /* _AIC7XXX_INLINE_H_ */
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