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aic7xxx_inline.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:16k
源码类别:
Linux/Unix编程
开发平台:
Unix_Linux
- /*
- * 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#35 $
- *
- * $FreeBSD: src/sys/dev/aic7xxx/aic7xxx_inline.h,v 1.2.2.11 2002/04/29 19:36:31 gibbs Exp $
- */
- #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)
- {
- ahc_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;
- ahc_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 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 = ahc_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]);
- }
- /*
- * 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_FREE;
- hscb->control = 0;
- SLIST_INSERT_HEAD(&ahc->scb_data->free_scbs, scb, links.sle);
- /* Notify the OSM that a resource is now available. */
- ahc_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 =
- ahc_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:%xn",
- scb->hscb->tag, scb->hscb->next);
- /*
- * Keep a history of SCBs we've downloaded in the qinfifo.
- */
- ahc->qinfifo[ahc->qinfifonext++] = scb->hscb->tag;
- /*
- * Make sure our data is consistant 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 void ahc_intr(struct ahc_softc *ahc);
- static __inline void
- ahc_sync_qoutfifo(struct ahc_softc *ahc, int op)
- {
- ahc_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) {
- ahc_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;
- ahc_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) {
- ahc_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 void
- ahc_intr(struct ahc_softc *ahc)
- {
- u_int intstat;
- /*
- * 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 & 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
- }
- if (intstat == 0xFF && (ahc->features & AHC_REMOVABLE) != 0)
- /* Hot eject */
- return;
- if ((intstat & INT_PEND) == 0) {
- #if AHC_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;
- }
- ahc->unsolicited_ints = 0;
- if (intstat & BRKADRINT) {
- ahc_handle_brkadrint(ahc);
- /* Fatal error, no more interrupts to handle. */
- return;
- }
- 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);
- }
- #endif /* _AIC7XXX_INLINE_H_ */