6 Commits

Author	SHA1	Message	Date
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
Scott Long	8528a71202	The sequencer downloading code assumes that all jump ... labels are acurate in relation to a fully compiled sequencer program (all patches downloaded). Correct a few occurances of a relative jump across a macro that ended up jumping us into the last instruction of the macro. Spproved by: re (bmah)	2002-12-05 00:47:27 +00:00
Scott Long	0c5aa4c57b	Major update to the ahd driver to fix many bugs found in the previous ... version, plus add support for the new features found in the Rev B version of the chip. The changelog is quite long and can be provided on request. Major features include vastly improved protocol violation handling, full support for the 7902 Rev B, better parity error handling, and better packetized overrun handling, to name a few. Approved by: re (blanket)	2002-12-01 08:13:37 +00:00
Justin T. Gibbs	c59c8a72cf	Upgrade to version 1.1 of the aic79xx U320 driver. ... aic79xx.c: o Remove redundant ahd_update_modes() call. o Correct panic in diagnostic should state corruption cause the SCB Id to be invalid during a selection timeout. o Add workaround for missing BUSFREEREV feature in Rev A silicon. o Corect formatting nits. o Use register pretty printing in more places. o Save and restore our SCB pointer when updating the waiting queue list for an "expected" LQ-out busfree. o In ahd_clear_intstat, deal with the missing autoclear in the CLRLQO* registers. o BE fixup in a diagnostic printf. o Make sure that we are in the proper mode before disabling selections in ahd_update_pending_scbs. o Add more diagnostics. o task_attribute_nonpkt_tag -> task_attribute: we don't need a nonpkt_tag field anymore for allowing all 512 SCBs to be used in non-packetized connections. o Negotiate HOLD_MCS to U320 devices. o Add a few additional mode assertions. o Restore the chip mode after clearing out the qinfifo so that code using ahd_abort_scbs sees a consistent mode. o Simplify the DMA engine shutdown routine prior to performing a bus reset. o Perform the sequencer restart after a chip reset prior to setting up our timer to poll for the reset to be complete. On some OSes, the timer could actually pre-empt us and order is important here. o Have our "reset poller" set the expected mode since there is no guarantee of what mode will be in force when we are called from the OS timer. o Save and restore the SCB pointer in ahd_dump_card_state(). This routine must not modify card state. o Ditto for ahd_dump_scbs(). aic79xx.h: o Add a few more chip bug definitions. o Align our tag on a 32bit boundary. aic79xx.reg: aic79xx.seq: o Start work on removing workarounds for Rev B. o Use a special location in scratch from for stroring our SCBPTR during legacy FIFO allocations. This corrects problems in mixed packetized/non-packetized configurations where calling into a FIFO task corrupted our SCBPTR. o Don't rely on DMA priority to guarantee that all data in our FIFOs will flush prior to a command completion notification going out of the command channel. We've never seen this assumption fail, but better safe than sorry. o Deal with missing BUSFREEREV feature in H2A. o Simplify disconnect list code now that the list will always have only a single entry. o Implement the AHD_REG_SLOW_SETTLE_BUG workaround. o Swith to using "REG_ISR" for local mode scratch during our ISR. o Add a missing jmp to the data_group_dma_loop after our data pointers have been re-initialized by the kernel. o Correct test in the bitbucket code so that we actually wait for the bitbucket to complete before signaling the kernel of the overrun condition. o Reposition pkt_saveptrs to avoid a jmp instruction. o Update a comment to reflect that the code now waits for a FIFO to drain prior to issuing a CLRCHN. aic79xx_inline.h: o Remove unused untagged queue handling code. o Don't attempt to htole64 what could be a 32bit value. aic79xx_pci.c: o Set additional bug flags for rev A chips.	2002-09-26 22:54:00 +00:00
Justin T. Gibbs	8fdc126111	Add a prefix to be used for assembler generated tables and ... functions for register pretty-printing. Implement "top bit of SCBID is valid bit" qoutfifo delivery scheme. "the the" -> "the". Remove old and never used tag collision chain handling in the sequencer. Tag collisions are never allowed to get as far as on the controller. Simplify busy target table handling routines. Update comments to reflect reality. Add support for catching more protocol violations. Correct a bug in data fifo handling in mixed packetized and non-packetized environments. SG_STATE must be cleared even if an SG fetch is not in progress at the time of FIFO shutdown or we may confuse the non-packetized transaction idle-loop.	2002-08-31 06:49:55 +00:00
Justin T. Gibbs	17d2475554	Enter the ahd driver which supports the Adaptec AIC7902 Ultra320, PCI-X ... SCSI Controller chip.	2002-06-05 19:52:45 +00:00