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freebsd-nq/sys/dev/aic7xxx/aic79xx_inline.h
Justin T. Gibbs 0794987d01 aic79xx.c: 
Implement the SCB_SILENT flag.  This is useful for
	hushing up the driver during DV or other operations
	that we expect to cause transmission errors.  The
	messages will still print if the SHOW_MASKED_ERRORS
	debug option is enabled.

	Save and restore the NEGOADDR address when setting
	new transfer settings.  The sequencer performs lookups
	in the negotiation table too and it expects NEGOADDR
	to remain consistent across pause/unpause sessions.

	Consistently use "offset" instead of "period" to determine
	if we are running sync or not.

	Add a SHOW_MESSAGES diagnostic for when we assert ATN
	during message processing.

	Print out IU, QAS, and RTI features when showing transfer options.

	Limit the syncrate after all option conformance
	changes have taken place in ahd_devlimited_syncrate.
	Changes in options may change the final syncrate we
	accept.

	Keep a copy of the hs_mailbox in our softc so that
	we can perform read/modify/write operations on the
	hs_mailbox without having to pause the sequencer to
	read the last written value.  Use the ENINT_COALESS
	flag in the hs_mailbox to toggle interrupt coalessing.

	Add entrypoints for enabling interrupt coalessing and
	setting both a timeout (how long to wait for commands
	to be coalessed) and a maximum commands to coaless value.
	Add a statistics timer that decides when to enable or
	disable interrupt coalessing based on load.

	Add a routine, ahd_reset_cmds_pending() which is used
	to update the CMDS_PENDING sequencer variable whenever
	error recovery compeltes SCBs without notifying the
	sequencer.  Since ahd_reset_cmds_pending is called
	during ahd_unpause() only if we've aborted SCBs, its
	call to ahd_flush_qoutfifo should not cause recursion
	through ahd_run_qoutfifo().  A panic has been added to
	ensure that this recursion does not occur.

	In ahd_search_qinfifo, update the CMDS_PENDING sequencer
	variable directly.  ahd_search_qinififo can be called
	in situations where using ahd_reset_cmds_pending() might
	cause recursion.  Since we can safely determine the
	exact number to reduce CMDS_PENDING by in this scenario
	without running the qoutfifo, the manual update is sufficient.

	Clean up diagnostics.
	Add ahd_flush_qoutfifo() which will run the qoutfifo
	as well as complete any commands sitting on the
	sequencer's COMPLETE_SCB lists or the good status FIFO.
	Use this routine in several places that did similar
	things in an add-hoc, but incomplete, fashion.  A call
	to this routine was also added to ahd_abort_scbs() to
	close a race.

	In ahd_pause_and_flushwork() only return once selections
	are safely disabled.  Flush all completed commands via
	ahd_flush_qoutfifo().

	Remove "Now packetized" diagnostic now that this
	information is incorperated into the actual negotiation
	messages that are displayed.

	When forcing renegotiation, don't clober the current
	ppr_options.  Much of the driver uses this information
	to determine if we are currently packetized or not.

	Remove some stray spaces at column 1 in ahd_set_tags.

	When complaining about getting a host message loop
	request with no pending messages, print out the
	SCB_CONTROL register down on the card.

	Modify the ahd_sent_msg() routine to handle a search
	for an outgoing identify message.  Use this to detect
	a msg reject on an identify message which typically
	indicates that the target thought we were packetized.
	Force a renegotiation in this case.

	In ahd_search_qinfifo(), wait more effectively for SCB
	DMA activities to cease.  We also disable SCB fetch
	operations since we are about to change the qinfifo
	and any fetch in progress will likely be invalidated.

	In ahd_qinfifo_count(), fix the qinfifo empty case.

	In ahd_dump_card_state(), print out CCSCBCTL in the
	correct mode.

	If we are a narrow controller, don't set the current
	width to unknown when forcing a future negotiation.
	This just confuses the code into attempting a wide
	negotiation on a narrow bus.

	Add support for task management function completions.

	Modify ahd_handle_devreset so that it can handle
	lun resets in addition to target resets.  Use
	ahd_handle_devreset for lun and target reset task
	management functions.

	Handle the abort task TMF race case better.  We now
	wait until any current selections are over and then
	set the TMF back to zero.  This should cause the sequencer
	to ignore the abort TMF completion should it occur.

	Correct a bug in the illegal phase handler that
	caused us to drop down to narrow when handling the
	unexpected command phase case after 3rd party
	reset of a packetized device.

	Indicate the features, bugs, and flags set in the softc
	that are used to control firmware patch download when
        booting verbose.

aic79xx.h:
	Add coalessing and HS_MAILBOX fields.

	Add per-softc variables for the stats "daemon".

	Add a debug option for interrupt coalessing activities.

	Add two new softc flags:
	o AHD_UPDATE_PEND_CMDS
	  Run ahd_reset_cmds_pending() on the next unpause.

	o AHD_RUNNING_QOUTFIFO
	  Used to catch recursion through ahd_run_qoutfifo().

aic79xx.reg:
	Correct register addresses related to the software timer
	and the DFDBCTL register.

	Add constants paramaterizing the software timer.

	Add scratch ram locations for storing interrupt coalessing
	tunables.

	Break INTMASK in SEQITNCTL out into INTMASK1 and INTMASK2.
	In at least the REV A, these are writable bits.  We make
	use of that for a swtimer workaround in the sequencer.

	Since HS_MAILBOX autoclears, provide a sequencer variable
	to store its contents.

	Add SEQINT codes for handling task management completions.

aic79xx.seq:
	Correct ignore wide residue processing check for
	a wide negotiation being in effect.  We must be
	in the SCSI register window in order to access the
	negotiation table.

	Use the software timer and a commands completed count to
	implement interrupt coalessing.  The command complete is
	deferred until either the maximum command threshold or a
	the expiration of a command deferral timer.  If we have
	more SCBs to complete to the host (sitting in COMPLETE_SCB
	lists), always try to coaless them up to our coalessing limit.
	If coalessing is enabled, but we have fewer commands oustanting
	than the host's min coalessing limit, complete the command
	immediately.

	Add code to track the number of commands outstanding.
	Commands are outstanding from the time they are placed
	into the execution queue until the DMA to post completion
	is setup.

	Add a workaround for intvec_2 interrupts on the H2A4.
	In H2A4, the mode pointer is not saved for intvec2, but
	is restored on iret.  This can lead to the restoration
	of a bogus mode ptr.  Manually clear the intmask bits and
	do a normal return to compensate.  We use intvec_2 to
	track interrupt coalessing timeouts.

	Since we cannot disable the swtimer's countdown, simply
	mask its interrupt once we no longer care about it firing.

	In idle_loop_cchan, update LOCAL_HS_MAILBOX everytime
	we are notified of an HS_MAILBOX update via the
	HS_MAILBOX_ACT bit in QOFF_CTLSTA.  We have to use a
	local copy of persistant portions of the HS_MAILBOX as
	the mailbox auto-clears on any read.

	Move the test for the cfg4istat interrupt up an instruction
	to hopefully close a race between the next outgoing selection
	and our disabling of selections.

	Add a missing ret to the last instruction in load_overrun_buf.

	Add notifications to the host of task management
	completions as well as the completions for commands
	that completed successfully before their corresponding
	TMF could be sent.

	Hold a critical section during select-out processing
	until we have a fully identified connection.  This
	removes a race condition with the legacy abort handler.

	Correct a few spelling errors in some comments.

aic79xx_inline.h:
	Call ahd_reset_cmds_pending() in ahd_unpause if required.

	Update cmdcmplt interrupt statistics in our interrupt
	handler.

	Allow callers to ahd_send_scb() to set the task management
	function.

aic79xx_pci.c:
	Disable SERR and pause the controller prior to performing
	our mmapped I/O test.  The U320 controllers do not support
	"auto-access-pause".

aic79xx_osm.c:
	Set the task management function now that
	ahd_send_scb() doesn't do it for us.  We
	also perform a lun reset in response to BDR
	requests to packetized devices.
2003-01-20 20:17:35 +00:00

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/*
* Inline routines shareable across OS platforms.
*
* Copyright (c) 1994-2001 Justin T. Gibbs.
* 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/aic7xxx/aic79xx_inline.h#41 $
*
* $FreeBSD$
*/
#ifndef _AIC79XX_INLINE_H_
#define _AIC79XX_INLINE_H_
/******************************** Debugging ***********************************/
static __inline char *ahd_name(struct ahd_softc *ahd);
static __inline char *
ahd_name(struct ahd_softc *ahd)
{
return (ahd->name);
}
/************************ Sequencer Execution Control *************************/
static __inline void ahd_known_modes(struct ahd_softc *ahd,
ahd_mode src, ahd_mode dst);
static __inline ahd_mode_state ahd_build_mode_state(struct ahd_softc *ahd,
ahd_mode src,
ahd_mode dst);
static __inline void ahd_extract_mode_state(struct ahd_softc *ahd,
ahd_mode_state state,
ahd_mode *src, ahd_mode *dst);
static __inline void ahd_set_modes(struct ahd_softc *ahd, ahd_mode src,
ahd_mode dst);
static __inline void ahd_update_modes(struct ahd_softc *ahd);
static __inline void ahd_assert_modes(struct ahd_softc *ahd, ahd_mode srcmode,
ahd_mode dstmode, const char *file,
int line);
static __inline ahd_mode_state ahd_save_modes(struct ahd_softc *ahd);
static __inline void ahd_restore_modes(struct ahd_softc *ahd,
ahd_mode_state state);
static __inline int ahd_is_paused(struct ahd_softc *ahd);
static __inline void ahd_pause(struct ahd_softc *ahd);
static __inline void ahd_unpause(struct ahd_softc *ahd);
static __inline void
ahd_known_modes(struct ahd_softc *ahd, ahd_mode src, ahd_mode dst)
{
ahd->src_mode = src;
ahd->dst_mode = dst;
ahd->saved_src_mode = src;
ahd->saved_dst_mode = dst;
}
static __inline ahd_mode_state
ahd_build_mode_state(struct ahd_softc *ahd, ahd_mode src, ahd_mode dst)
{
return ((src << SRC_MODE_SHIFT) | (dst << DST_MODE_SHIFT));
}
static __inline void
ahd_extract_mode_state(struct ahd_softc *ahd, ahd_mode_state state,
ahd_mode *src, ahd_mode *dst)
{
*src = (state & SRC_MODE) >> SRC_MODE_SHIFT;
*dst = (state & DST_MODE) >> DST_MODE_SHIFT;
}
static __inline void
ahd_set_modes(struct ahd_softc *ahd, ahd_mode src, ahd_mode dst)
{
if (ahd->src_mode == src && ahd->dst_mode == dst)
return;
#ifdef AHD_DEBUG
if (ahd->src_mode == AHD_MODE_UNKNOWN
|| ahd->dst_mode == AHD_MODE_UNKNOWN)
panic("Setting mode prior to saving it.\n");
if ((ahd_debug & AHD_SHOW_MODEPTR) != 0)
printf("%s: Setting mode 0x%x\n", ahd_name(ahd),
ahd_build_mode_state(ahd, src, dst));
#endif
ahd_outb(ahd, MODE_PTR, ahd_build_mode_state(ahd, src, dst));
ahd->src_mode = src;
ahd->dst_mode = dst;
}
static __inline void
ahd_update_modes(struct ahd_softc *ahd)
{
ahd_mode_state mode_ptr;
ahd_mode src;
ahd_mode dst;
mode_ptr = ahd_inb(ahd, MODE_PTR);
#ifdef AHD_DEBUG
if ((ahd_debug & AHD_SHOW_MODEPTR) != 0)
printf("Reading mode 0x%x\n", mode_ptr);
#endif
ahd_extract_mode_state(ahd, mode_ptr, &src, &dst);
ahd_known_modes(ahd, src, dst);
}
static __inline void
ahd_assert_modes(struct ahd_softc *ahd, ahd_mode srcmode,
ahd_mode dstmode, const char *file, int line)
{
#ifdef AHD_DEBUG
if ((srcmode & AHD_MK_MSK(ahd->src_mode)) == 0
|| (dstmode & AHD_MK_MSK(ahd->dst_mode)) == 0) {
panic("%s:%s:%d: Mode assertion failed.\n",
ahd_name(ahd), file, line);
}
#endif
}
static __inline ahd_mode_state
ahd_save_modes(struct ahd_softc *ahd)
{
if (ahd->src_mode == AHD_MODE_UNKNOWN
|| ahd->dst_mode == AHD_MODE_UNKNOWN)
ahd_update_modes(ahd);
return (ahd_build_mode_state(ahd, ahd->src_mode, ahd->dst_mode));
}
static __inline void
ahd_restore_modes(struct ahd_softc *ahd, ahd_mode_state state)
{
ahd_mode src;
ahd_mode dst;
ahd_extract_mode_state(ahd, state, &src, &dst);
ahd_set_modes(ahd, src, dst);
}
#define AHD_ASSERT_MODES(ahd, source, dest) \
ahd_assert_modes(ahd, source, dest, __FILE__, __LINE__);
/*
* Determine whether the sequencer has halted code execution.
* Returns non-zero status if the sequencer is stopped.
*/
static __inline int
ahd_is_paused(struct ahd_softc *ahd)
{
return ((ahd_inb(ahd, 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
ahd_pause(struct ahd_softc *ahd)
{
ahd_outb(ahd, HCNTRL, ahd->pause);
/*
* Since the sequencer can disable pausing in a critical section, we
* must loop until it actually stops.
*/
while (ahd_is_paused(ahd) == 0)
;
}
/*
* 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
ahd_unpause(struct ahd_softc *ahd)
{
/*
* Automatically restore our modes to those saved
* prior to the first change of the mode.
*/
if (ahd->saved_src_mode != AHD_MODE_UNKNOWN
&& ahd->saved_dst_mode != AHD_MODE_UNKNOWN) {
if ((ahd->flags & AHD_UPDATE_PEND_CMDS) != 0)
ahd_reset_cmds_pending(ahd);
ahd_set_modes(ahd, ahd->saved_src_mode, ahd->saved_dst_mode);
}
if ((ahd_inb(ahd, INTSTAT) & ~(SWTMINT | CMDCMPLT)) == 0)
ahd_outb(ahd, HCNTRL, ahd->unpause);
ahd_known_modes(ahd, AHD_MODE_UNKNOWN, AHD_MODE_UNKNOWN);
}
/*********************** Scatter Gather List Handling *************************/
static __inline void *ahd_sg_setup(struct ahd_softc *ahd, struct scb *scb,
void *sgptr, bus_addr_t addr,
bus_size_t len, int last);
static __inline void ahd_setup_scb_common(struct ahd_softc *ahd,
struct scb *scb);
static __inline void ahd_setup_data_scb(struct ahd_softc *ahd,
struct scb *scb);
static __inline void ahd_setup_noxfer_scb(struct ahd_softc *ahd,
struct scb *scb);
static __inline void *
ahd_sg_setup(struct ahd_softc *ahd, struct scb *scb,
void *sgptr, bus_addr_t addr, bus_size_t len, int last)
{
scb->sg_count++;
if (sizeof(bus_addr_t) > 4
&& (ahd->flags & AHD_64BIT_ADDRESSING) != 0) {
struct ahd_dma64_seg *sg;
sg = (struct ahd_dma64_seg *)sgptr;
sg->addr = ahd_htole64(addr);
sg->len = ahd_htole32(len | (last ? AHD_DMA_LAST_SEG : 0));
return (sg + 1);
} else {
struct ahd_dma_seg *sg;
sg = (struct ahd_dma_seg *)sgptr;
sg->addr = ahd_htole32(addr & 0xFFFFFFFF);
sg->len = ahd_htole32(len | ((addr >> 8) & 0x7F000000)
| (last ? AHD_DMA_LAST_SEG : 0));
return (sg + 1);
}
}
static __inline void
ahd_setup_scb_common(struct ahd_softc *ahd, struct scb *scb)
{
/* XXX Handle target mode SCBs. */
scb->crc_retry_count = 0;
if ((scb->flags & SCB_PACKETIZED) != 0) {
/* XXX what about ACA?? It is type 4, but TAG_TYPE == 0x3. */
scb->hscb->task_attribute= scb->hscb->control & SCB_TAG_TYPE;
/*
* For Rev A short lun workaround.
*/
scb->hscb->pkt_long_lun[6] = scb->hscb->lun;
}
if (scb->hscb->cdb_len <= MAX_CDB_LEN_WITH_SENSE_ADDR
|| (scb->hscb->cdb_len & SCB_CDB_LEN_PTR) != 0)
scb->hscb->shared_data.idata.cdb_plus_saddr.sense_addr =
ahd_htole32(scb->sense_busaddr);
}
static __inline void
ahd_setup_data_scb(struct ahd_softc *ahd, struct scb *scb)
{
/*
* Copy the first SG into the "current" data ponter area.
*/
if ((ahd->flags & AHD_64BIT_ADDRESSING) != 0) {
struct ahd_dma64_seg *sg;
sg = (struct ahd_dma64_seg *)scb->sg_list;
scb->hscb->dataptr = sg->addr;
scb->hscb->datacnt = sg->len;
} else {
struct ahd_dma_seg *sg;
sg = (struct ahd_dma_seg *)scb->sg_list;
scb->hscb->dataptr = sg->addr;
if ((ahd->flags & AHD_39BIT_ADDRESSING) != 0) {
uint64_t high_addr;
high_addr = ahd_le32toh(sg->len) & 0x7F000000;
scb->hscb->dataptr |= ahd_htole64(high_addr << 8);
}
scb->hscb->datacnt = sg->len;
}
/*
* Note where to find the SG entries in bus space.
* We also set the full residual flag which the
* sequencer will clear as soon as a data transfer
* occurs.
*/
scb->hscb->sgptr = ahd_htole32(scb->sg_list_busaddr|SG_FULL_RESID);
}
static __inline void
ahd_setup_noxfer_scb(struct ahd_softc *ahd, struct scb *scb)
{
scb->hscb->sgptr = ahd_htole32(SG_LIST_NULL);
scb->hscb->dataptr = 0;
scb->hscb->datacnt = 0;
}
/************************** Memory mapping routines ***************************/
static __inline size_t ahd_sg_size(struct ahd_softc *ahd);
static __inline void *
ahd_sg_bus_to_virt(struct ahd_softc *ahd,
struct scb *scb,
uint32_t sg_busaddr);
static __inline uint32_t
ahd_sg_virt_to_bus(struct ahd_softc *ahd,
struct scb *scb,
void *sg);
static __inline void ahd_sync_scb(struct ahd_softc *ahd,
struct scb *scb, int op);
static __inline void ahd_sync_sglist(struct ahd_softc *ahd,
struct scb *scb, int op);
static __inline void ahd_sync_sense(struct ahd_softc *ahd,
struct scb *scb, int op);
static __inline uint32_t
ahd_targetcmd_offset(struct ahd_softc *ahd,
u_int index);
static __inline size_t
ahd_sg_size(struct ahd_softc *ahd)
{
if ((ahd->flags & AHD_64BIT_ADDRESSING) != 0)
return (sizeof(struct ahd_dma64_seg));
return (sizeof(struct ahd_dma_seg));
}
static __inline void *
ahd_sg_bus_to_virt(struct ahd_softc *ahd, struct scb *scb, uint32_t sg_busaddr)
{
bus_addr_t sg_offset;
/* sg_list_phys points to entry 1, not 0 */
sg_offset = sg_busaddr - (scb->sg_list_busaddr - ahd_sg_size(ahd));
return ((uint8_t *)scb->sg_list + sg_offset);
}
static __inline uint32_t
ahd_sg_virt_to_bus(struct ahd_softc *ahd, struct scb *scb, void *sg)
{
bus_addr_t sg_offset;
/* sg_list_phys points to entry 1, not 0 */
sg_offset = ((uint8_t *)sg - (uint8_t *)scb->sg_list)
- ahd_sg_size(ahd);
return (scb->sg_list_busaddr + sg_offset);
}
static __inline void
ahd_sync_scb(struct ahd_softc *ahd, struct scb *scb, int op)
{
ahd_dmamap_sync(ahd, ahd->scb_data.hscb_dmat,
scb->hscb_map->dmamap,
/*offset*/(uint8_t*)scb->hscb - scb->hscb_map->vaddr,
/*len*/sizeof(*scb->hscb), op);
}
static __inline void
ahd_sync_sglist(struct ahd_softc *ahd, struct scb *scb, int op)
{
if (scb->sg_count == 0)
return;
ahd_dmamap_sync(ahd, ahd->scb_data.sg_dmat,
scb->sg_map->dmamap,
/*offset*/scb->sg_list_busaddr - ahd_sg_size(ahd),
/*len*/ahd_sg_size(ahd) * scb->sg_count, op);
}
static __inline void
ahd_sync_sense(struct ahd_softc *ahd, struct scb *scb, int op)
{
ahd_dmamap_sync(ahd, ahd->scb_data.sense_dmat,
scb->sense_map->dmamap,
/*offset*/scb->sense_busaddr,
/*len*/AHD_SENSE_BUFSIZE, op);
}
static __inline uint32_t
ahd_targetcmd_offset(struct ahd_softc *ahd, u_int index)
{
return (((uint8_t *)&ahd->targetcmds[index])
- (uint8_t *)ahd->qoutfifo);
}
/*********************** Miscelaneous Support Functions ***********************/
static __inline void ahd_complete_scb(struct ahd_softc *ahd,
struct scb *scb);
static __inline void ahd_update_residual(struct ahd_softc *ahd,
struct scb *scb);
static __inline struct ahd_initiator_tinfo *
ahd_fetch_transinfo(struct ahd_softc *ahd,
char channel, u_int our_id,
u_int remote_id,
struct ahd_tmode_tstate **tstate);
static __inline uint16_t
ahd_inw(struct ahd_softc *ahd, u_int port);
static __inline void ahd_outw(struct ahd_softc *ahd, u_int port,
u_int value);
static __inline uint32_t
ahd_inl(struct ahd_softc *ahd, u_int port);
static __inline void ahd_outl(struct ahd_softc *ahd, u_int port,
uint32_t value);
static __inline uint64_t
ahd_inq(struct ahd_softc *ahd, u_int port);
static __inline void ahd_outq(struct ahd_softc *ahd, u_int port,
uint64_t value);
static __inline u_int ahd_get_scbptr(struct ahd_softc *ahd);
static __inline void ahd_set_scbptr(struct ahd_softc *ahd, u_int scbptr);
static __inline u_int ahd_get_hnscb_qoff(struct ahd_softc *ahd);
static __inline void ahd_set_hnscb_qoff(struct ahd_softc *ahd, u_int value);
static __inline u_int ahd_get_hescb_qoff(struct ahd_softc *ahd);
static __inline void ahd_set_hescb_qoff(struct ahd_softc *ahd, u_int value);
static __inline u_int ahd_get_snscb_qoff(struct ahd_softc *ahd);
static __inline void ahd_set_snscb_qoff(struct ahd_softc *ahd, u_int value);
static __inline u_int ahd_get_sescb_qoff(struct ahd_softc *ahd);
static __inline void ahd_set_sescb_qoff(struct ahd_softc *ahd, u_int value);
static __inline u_int ahd_get_sdscb_qoff(struct ahd_softc *ahd);
static __inline void ahd_set_sdscb_qoff(struct ahd_softc *ahd, u_int value);
static __inline u_int ahd_inb_scbram(struct ahd_softc *ahd, u_int offset);
static __inline u_int ahd_inw_scbram(struct ahd_softc *ahd, u_int offset);
static __inline uint32_t
ahd_inl_scbram(struct ahd_softc *ahd, u_int offset);
static __inline void ahd_swap_with_next_hscb(struct ahd_softc *ahd,
struct scb *scb);
static __inline void ahd_queue_scb(struct ahd_softc *ahd, struct scb *scb);
static __inline uint8_t *
ahd_get_sense_buf(struct ahd_softc *ahd,
struct scb *scb);
static __inline uint32_t
ahd_get_sense_bufaddr(struct ahd_softc *ahd,
struct scb *scb);
static __inline void
ahd_complete_scb(struct ahd_softc *ahd, struct scb *scb)
{
uint32_t sgptr;
sgptr = ahd_le32toh(scb->hscb->sgptr);
if ((sgptr & SG_STATUS_VALID) != 0)
ahd_handle_scb_status(ahd, scb);
else
ahd_done(ahd, scb);
}
/*
* Determine whether the sequencer reported a residual
* for this SCB/transaction.
*/
static __inline void
ahd_update_residual(struct ahd_softc *ahd, struct scb *scb)
{
uint32_t sgptr;
sgptr = ahd_le32toh(scb->hscb->sgptr);
if ((sgptr & SG_STATUS_VALID) != 0)
ahd_calc_residual(ahd, scb);
}
/*
* Return pointers to the transfer negotiation information
* for the specified our_id/remote_id pair.
*/
static __inline struct ahd_initiator_tinfo *
ahd_fetch_transinfo(struct ahd_softc *ahd, char channel, u_int our_id,
u_int remote_id, struct ahd_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 = ahd->enabled_targets[our_id];
return (&(*tstate)->transinfo[remote_id]);
}
#define AHD_COPY_COL_IDX(dst, src) \
do { \
dst->hscb->scsiid = src->hscb->scsiid; \
dst->hscb->lun = src->hscb->lun; \
} while (0)
static __inline uint16_t
ahd_inw(struct ahd_softc *ahd, u_int port)
{
return ((ahd_inb(ahd, port+1) << 8) | ahd_inb(ahd, port));
}
static __inline void
ahd_outw(struct ahd_softc *ahd, u_int port, u_int value)
{
ahd_outb(ahd, port, value & 0xFF);
ahd_outb(ahd, port+1, (value >> 8) & 0xFF);
}
static __inline uint32_t
ahd_inl(struct ahd_softc *ahd, u_int port)
{
return ((ahd_inb(ahd, port))
| (ahd_inb(ahd, port+1) << 8)
| (ahd_inb(ahd, port+2) << 16)
| (ahd_inb(ahd, port+3) << 24));
}
static __inline void
ahd_outl(struct ahd_softc *ahd, u_int port, uint32_t value)
{
ahd_outb(ahd, port, (value) & 0xFF);
ahd_outb(ahd, port+1, ((value) >> 8) & 0xFF);
ahd_outb(ahd, port+2, ((value) >> 16) & 0xFF);
ahd_outb(ahd, port+3, ((value) >> 24) & 0xFF);
}
static __inline uint64_t
ahd_inq(struct ahd_softc *ahd, u_int port)
{
return ((ahd_inb(ahd, port))
| (ahd_inb(ahd, port+1) << 8)
| (ahd_inb(ahd, port+2) << 16)
| (ahd_inb(ahd, port+3) << 24)
| (((uint64_t)ahd_inb(ahd, port+4)) << 32)
| (((uint64_t)ahd_inb(ahd, port+5)) << 40)
| (((uint64_t)ahd_inb(ahd, port+6)) << 48)
| (((uint64_t)ahd_inb(ahd, port+7)) << 56));
}
static __inline void
ahd_outq(struct ahd_softc *ahd, u_int port, uint64_t value)
{
ahd_outb(ahd, port, value & 0xFF);
ahd_outb(ahd, port+1, (value >> 8) & 0xFF);
ahd_outb(ahd, port+2, (value >> 16) & 0xFF);
ahd_outb(ahd, port+3, (value >> 24) & 0xFF);
ahd_outb(ahd, port+4, (value >> 32) & 0xFF);
ahd_outb(ahd, port+5, (value >> 40) & 0xFF);
ahd_outb(ahd, port+6, (value >> 48) & 0xFF);
ahd_outb(ahd, port+7, (value >> 56) & 0xFF);
}
static __inline u_int
ahd_get_scbptr(struct ahd_softc *ahd)
{
AHD_ASSERT_MODES(ahd, ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK),
~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK));
return (ahd_inb(ahd, SCBPTR) | (ahd_inb(ahd, SCBPTR + 1) << 8));
}
static __inline void
ahd_set_scbptr(struct ahd_softc *ahd, u_int scbptr)
{
AHD_ASSERT_MODES(ahd, ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK),
~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK));
ahd_outb(ahd, SCBPTR, scbptr & 0xFF);
ahd_outb(ahd, SCBPTR+1, (scbptr >> 8) & 0xFF);
}
static __inline u_int
ahd_get_hnscb_qoff(struct ahd_softc *ahd)
{
return (ahd_inw_atomic(ahd, HNSCB_QOFF));
}
static __inline void
ahd_set_hnscb_qoff(struct ahd_softc *ahd, u_int value)
{
ahd_outw_atomic(ahd, HNSCB_QOFF, value);
}
static __inline u_int
ahd_get_hescb_qoff(struct ahd_softc *ahd)
{
return (ahd_inb(ahd, HESCB_QOFF));
}
static __inline void
ahd_set_hescb_qoff(struct ahd_softc *ahd, u_int value)
{
ahd_outb(ahd, HESCB_QOFF, value);
}
static __inline u_int
ahd_get_snscb_qoff(struct ahd_softc *ahd)
{
u_int oldvalue;
AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK);
oldvalue = ahd_inw(ahd, SNSCB_QOFF);
ahd_outw(ahd, SNSCB_QOFF, oldvalue);
return (oldvalue);
}
static __inline void
ahd_set_snscb_qoff(struct ahd_softc *ahd, u_int value)
{
AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK);
ahd_outw(ahd, SNSCB_QOFF, value);
}
static __inline u_int
ahd_get_sescb_qoff(struct ahd_softc *ahd)
{
AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK);
return (ahd_inb(ahd, SESCB_QOFF));
}
static __inline void
ahd_set_sescb_qoff(struct ahd_softc *ahd, u_int value)
{
AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK);
ahd_outb(ahd, SESCB_QOFF, value);
}
static __inline u_int
ahd_get_sdscb_qoff(struct ahd_softc *ahd)
{
AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK);
return (ahd_inb(ahd, SDSCB_QOFF) | (ahd_inb(ahd, SDSCB_QOFF + 1) << 8));
}
static __inline void
ahd_set_sdscb_qoff(struct ahd_softc *ahd, u_int value)
{
AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK);
ahd_outb(ahd, SDSCB_QOFF, value & 0xFF);
ahd_outb(ahd, SDSCB_QOFF+1, (value >> 8) & 0xFF);
}
static __inline u_int
ahd_inb_scbram(struct ahd_softc *ahd, u_int offset)
{
u_int value;
/*
* Workaround PCI-X Rev A. hardware bug.
* After a host read of SCB memory, the chip
* may become confused into thinking prefetch
* was required. This starts the discard timer
* running and can cause an unexpected discard
* timer interrupt. The work around is to read
* a normal register prior to the exhaustion of
* the discard timer. The mode pointer register
* has no side effects and so serves well for
* this purpose.
*
* Razor #528
*/
value = ahd_inb(ahd, offset);
ahd_inb(ahd, MODE_PTR);
return (value);
}
static __inline u_int
ahd_inw_scbram(struct ahd_softc *ahd, u_int offset)
{
return (ahd_inb_scbram(ahd, offset)
| (ahd_inb_scbram(ahd, offset+1) << 8));
}
static __inline uint32_t
ahd_inl_scbram(struct ahd_softc *ahd, u_int offset)
{
return (ahd_inb_scbram(ahd, offset)
| (ahd_inb_scbram(ahd, offset+1) << 8)
| (ahd_inb_scbram(ahd, offset+2) << 16)
| (ahd_inb_scbram(ahd, offset+3) << 24));
}
static __inline struct scb *
ahd_lookup_scb(struct ahd_softc *ahd, u_int tag)
{
struct scb* scb;
if (tag >= AHD_SCB_MAX)
return (NULL);
scb = ahd->scb_data.scbindex[tag];
if (scb != NULL)
ahd_sync_scb(ahd, scb,
BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
return (scb);
}
static __inline void
ahd_swap_with_next_hscb(struct ahd_softc *ahd, struct scb *scb)
{
struct hardware_scb *q_hscb;
uint32_t saved_hscb_busaddr;
/*
* Our queuing method is a bit tricky. The card
* knows in advance which HSCB (by address) to download,
* and we can't disappoint it. To achieve this, the next
* HSCB to download is saved off in ahd->next_queued_hscb.
* 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 = ahd->next_queued_hscb;
saved_hscb_busaddr = q_hscb->hscb_busaddr;
memcpy(q_hscb, scb->hscb, sizeof(*scb->hscb));
q_hscb->hscb_busaddr = saved_hscb_busaddr;
q_hscb->next_hscb_busaddr = scb->hscb->hscb_busaddr;
/* Now swap HSCB pointers. */
ahd->next_queued_hscb = scb->hscb;
scb->hscb = q_hscb;
/* Now define the mapping from tag to SCB in the scbindex */
ahd->scb_data.scbindex[SCB_GET_TAG(scb)] = scb;
}
/*
* Tell the sequencer about a new transaction to execute.
*/
static __inline void
ahd_queue_scb(struct ahd_softc *ahd, struct scb *scb)
{
ahd_swap_with_next_hscb(ahd, scb);
if (SCBID_IS_NULL(SCB_GET_TAG(scb)))
panic("Attempt to queue invalid SCB tag %x\n",
SCB_GET_TAG(scb));
/*
* Keep a history of SCBs we've downloaded in the qinfifo.
*/
ahd->qinfifo[AHD_QIN_WRAP(ahd->qinfifonext)] = SCB_GET_TAG(scb);
ahd->qinfifonext++;
if (scb->sg_count != 0)
ahd_setup_data_scb(ahd, scb);
else
ahd_setup_noxfer_scb(ahd, scb);
ahd_setup_scb_common(ahd, scb);
/*
* Make sure our data is consistant from the
* perspective of the adapter.
*/
ahd_sync_scb(ahd, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
#ifdef AHD_DEBUG
if ((ahd_debug & AHD_SHOW_QUEUE) != 0) {
printf("%s: Queueing SCB 0x%x bus addr 0x%x - 0x%x%x/0x%x\n",
ahd_name(ahd),
SCB_GET_TAG(scb), scb->hscb->hscb_busaddr,
(u_int)((scb->hscb->dataptr >> 32) & 0xFFFFFFFF),
(u_int)(scb->hscb->dataptr & 0xFFFFFFFF),
scb->hscb->datacnt);
}
#endif
/* Tell the adapter about the newly queued SCB */
ahd_set_hnscb_qoff(ahd, ahd->qinfifonext);
}
static __inline uint8_t *
ahd_get_sense_buf(struct ahd_softc *ahd, struct scb *scb)
{
return (scb->sense_data);
}
static __inline uint32_t
ahd_get_sense_bufaddr(struct ahd_softc *ahd, struct scb *scb)
{
return (scb->sense_busaddr);
}
/************************** Interrupt Processing ******************************/
static __inline void ahd_sync_qoutfifo(struct ahd_softc *ahd, int op);
static __inline void ahd_sync_tqinfifo(struct ahd_softc *ahd, int op);
static __inline u_int ahd_check_cmdcmpltqueues(struct ahd_softc *ahd);
static __inline void ahd_intr(struct ahd_softc *ahd);
static __inline void
ahd_sync_qoutfifo(struct ahd_softc *ahd, int op)
{
ahd_dmamap_sync(ahd, ahd->shared_data_dmat, ahd->shared_data_dmamap,
/*offset*/0, /*len*/AHC_SCB_MAX * sizeof(uint16_t), op);
}
static __inline void
ahd_sync_tqinfifo(struct ahd_softc *ahd, int op)
{
#ifdef AHD_TARGET_MODE
if ((ahd->flags & AHD_TARGETROLE) != 0) {
ahd_dmamap_sync(ahd, ahd->shared_data_dmat,
ahd->shared_data_dmamap,
ahd_targetcmd_offset(ahd, 0),
sizeof(struct target_cmd) * AHD_TMODE_CMDS,
op);
}
#endif
}
/*
* See if the firmware has posted any completed commands
* into our in-core command complete fifos.
*/
#define AHD_RUN_QOUTFIFO 0x1
#define AHD_RUN_TQINFIFO 0x2
static __inline u_int
ahd_check_cmdcmpltqueues(struct ahd_softc *ahd)
{
u_int retval;
retval = 0;
ahd_dmamap_sync(ahd, ahd->shared_data_dmat, ahd->shared_data_dmamap,
/*offset*/ahd->qoutfifonext, /*len*/2,
BUS_DMASYNC_POSTREAD);
if ((ahd->qoutfifo[ahd->qoutfifonext]
& QOUTFIFO_ENTRY_VALID_LE) == ahd->qoutfifonext_valid_tag)
retval |= AHD_RUN_QOUTFIFO;
#ifdef AHD_TARGET_MODE
if ((ahd->flags & AHD_TARGETROLE) != 0
&& (ahd->flags & AHD_TQINFIFO_BLOCKED) == 0) {
ahd_dmamap_sync(ahd, ahd->shared_data_dmat,
ahd->shared_data_dmamap,
ahd_targetcmd_offset(ahd, ahd->tqinfifofnext),
/*len*/sizeof(struct target_cmd),
BUS_DMASYNC_POSTREAD);
if (ahd->targetcmds[ahd->tqinfifonext].cmd_valid != 0)
retval |= AHD_RUN_TQINFIFO;
}
#endif
return (retval);
}
/*
* Catch an interrupt from the adapter
*/
static __inline void
ahd_intr(struct ahd_softc *ahd)
{
u_int intstat;
if ((ahd->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;
}
/*
* 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 ((ahd->flags & AHD_ALL_INTERRUPTS) == 0
&& (ahd_check_cmdcmpltqueues(ahd) != 0))
intstat = CMDCMPLT;
else
intstat = ahd_inb(ahd, INTSTAT);
if (intstat & CMDCMPLT) {
ahd_outb(ahd, 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.
*/
if ((ahd->bugs & AHD_INTCOLLISION_BUG) != 0) {
if (ahd_is_paused(ahd)) {
/*
* Potentially lost SEQINT.
* If SEQINTCODE is non-zero,
* simulate the SEQINT.
*/
if (ahd_inb(ahd, SEQINTCODE) != NO_SEQINT)
intstat |= SEQINT;
}
} else {
ahd_flush_device_writes(ahd);
}
ahd_run_qoutfifo(ahd);
ahd->cmdcmplt_counts[ahd->cmdcmplt_bucket]++;
ahd->cmdcmplt_total++;
#ifdef AHD_TARGET_MODE
if ((ahd->flags & AHD_TARGETROLE) != 0)
ahd_run_tqinfifo(ahd, /*paused*/FALSE);
#endif
}
if (intstat == 0xFF && (ahd->features & AHD_REMOVABLE) != 0)
/* Hot eject */
return;
if ((intstat & INT_PEND) == 0)
return;
if (intstat & HWERRINT) {
ahd_handle_hwerrint(ahd);
return;
}
if ((intstat & (PCIINT|SPLTINT)) != 0) {
ahd->bus_intr(ahd);
return;
}
if ((intstat & SEQINT) != 0)
ahd_handle_seqint(ahd, intstat);
if ((intstat & SCSIINT) != 0)
ahd_handle_scsiint(ahd, intstat);
}
#endif /* _AIC79XX_INLINE_H_ */
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