drop old 53c7xx driver
PATCH 1/1 drop old 53c7xx driver
It's been more than enough time now to try to get the new m68k drivers into the tree. Let's remove the old ones and we can remerge the new glue once it's ready. Given that there are patches to rename two out of the three drivers in m68k CVS and all of them need a lot of codingstyle love anyway that's probably the better strategy to begin with.
Signed-off-by Christoph Hellwig <[email protected]>
drivers/scsi/53c7xx.c deleted +0 -6102
@@ -1,6102 +0,0 @@ -/* -* 53c710 driver. Modified from Drew Eckhardts driver -* for 53c810 by Richard Hirst [[email protected]] -* Check out PERM_OPTIONS and EXPECTED_CLOCK, which may be defined in the -* relevant machine specific file (eg. mvme16x.[ch], amiga7xx.[ch]). -* There are also currently some defines at the top of 53c7xx.scr. -* The chip type is #defined in script_asm.pl, as well as the Makefile. -* Host scsi ID expected to be 7 - see NCR53c7x0_init(). -* -* I have removed the PCI code and some of the 53c8xx specific code - -* simply to make this file smaller and easier to manage. -* -* MVME16x issues: -* Problems trying to read any chip registers in NCR53c7x0_init(), as they -* may never have been set by 16xBug (eg. If kernel has come in over tftp). -*/ - -/* -* Adapted for Linux/m68k Amiga platforms for the A4000T/A4091 and -* WarpEngine SCSI controllers. -* By Alan Hourihane <[email protected]> -* Thanks to Richard Hirst for making it possible with the MVME additions -*/ - -/* -* 53c710 rev 0 doesn't support add with carry. Rev 1 and 2 does. To -* overcome this problem you can define FORCE_DSA_ALIGNMENT, which ensures -* that the DSA address is always xxxxxx00. If disconnection is not allowed, -* then the script only ever tries to add small (< 256) positive offsets to -* DSA, so lack of carry isn't a problem. FORCE_DSA_ALIGNMENT can, of course, -* be defined for all chip revisions at a small cost in memory usage. -*/ - -#define FORCE_DSA_ALIGNMENT - -/* -* Selection timer does not always work on the 53c710, depending on the -* timing at the last disconnect, if this is a problem for you, try -* using validids as detailed below. -* -* Options for the NCR7xx driver -* -* noasync:0 - disables sync and asynchronous negotiation -* nosync:0 - disables synchronous negotiation (does async) -* nodisconnect:0 - disables disconnection -* validids:0x?? - Bitmask field that disallows certain ID's. -* - e.g. 0x03 allows ID 0,1 -* - 0x1F allows ID 0,1,2,3,4 -* opthi:n - replace top word of options with 'n' -* optlo:n - replace bottom word of options with 'n' -* - ALWAYS SPECIFY opthi THEN optlo <<<<<<<<<< -*/ - -/* -* PERM_OPTIONS are driver options which will be enabled for all NCR boards -* in the system at driver initialization time. -* -* Don't THINK about touching these in PERM_OPTIONS : -* OPTION_MEMORY_MAPPED -* 680x0 doesn't have an IO map! -* -* OPTION_DEBUG_TEST1 -* Test 1 does bus mastering and interrupt tests, which will help weed -* out brain damaged main boards. -* -* Other PERM_OPTIONS settings are listed below. Note the actual options -* required are set in the relevant file (mvme16x.c, amiga7xx.c, etc): -* -* OPTION_NO_ASYNC -* Don't negotiate for asynchronous transfers on the first command -* when OPTION_ALWAYS_SYNCHRONOUS is set. Useful for dain bramaged -* devices which do something bad rather than sending a MESSAGE -* REJECT back to us like they should if they can't cope. -* -* OPTION_SYNCHRONOUS -* Enable support for synchronous transfers. Target negotiated -* synchronous transfers will be responded to. To initiate -* a synchronous transfer request, call -* -* request_synchronous (hostno, target) -* -* from within KGDB. -* -* OPTION_ALWAYS_SYNCHRONOUS -* Negotiate for synchronous transfers with every target after -* driver initialization or a SCSI bus reset. This is a bit dangerous, -* since there are some dain bramaged SCSI devices which will accept -* SDTR messages but keep talking asynchronously. -* -* OPTION_DISCONNECT -* Enable support for disconnect/reconnect. To change the -* default setting on a given host adapter, call -* -* request_disconnect (hostno, allow) -* -* where allow is non-zero to allow, 0 to disallow. -* -* If you really want to run 10MHz FAST SCSI-II transfers, you should -* know that the NCR driver currently ignores parity information. Most -* systems do 5MHz SCSI fine. I've seen a lot that have problems faster -* than 8MHz. To play it safe, we only request 5MHz transfers. -* -* If you'd rather get 10MHz transfers, edit sdtr_message and change -* the fourth byte from 50 to 25. -*/ - -/* -* Sponsored by -* iX Multiuser Multitasking Magazine -* Hannover, Germany -* [email protected] -* -* Copyright 1993, 1994, 1995 Drew Eckhardt -* Visionary Computing -* (Unix and Linux consulting and custom programming) -* [email protected] -* +1 (303) 786-7975 -* -* TolerANT and SCSI SCRIPTS are registered trademarks of NCR Corporation. -* -* For more information, please consult -* -* NCR53C810 -* SCSI I/O Processor -* Programmer's Guide -* -* NCR 53C810 -* PCI-SCSI I/O Processor -* Data Manual -* -* NCR 53C810/53C820 -* PCI-SCSI I/O Processor Design In Guide -* -* For literature on Symbios Logic Inc. formerly NCR, SCSI, -* and Communication products please call (800) 334-5454 or -* (719) 536-3300. -* -* PCI BIOS Specification Revision -* PCI Local Bus Specification -* PCI System Design Guide -* -* PCI Special Interest Group -* M/S HF3-15A -* 5200 N.E. Elam Young Parkway -* Hillsboro, Oregon 97124-6497 -* +1 (503) 696-2000 -* +1 (800) 433-5177 -*/ - -/* -* Design issues : -* The cumulative latency needed to propagate a read/write request -* through the file system, buffer cache, driver stacks, SCSI host, and -* SCSI device is ultimately the limiting factor in throughput once we -* have a sufficiently fast host adapter. -* -* So, to maximize performance we want to keep the ratio of latency to data -* transfer time to a minimum by -* 1. Minimizing the total number of commands sent (typical command latency -* including drive and bus mastering host overhead is as high as 4.5ms) -* to transfer a given amount of data. -* -* This is accomplished by placing no arbitrary limit on the number -* of scatter/gather buffers supported, since we can transfer 1K -* per scatter/gather buffer without Eric's cluster patches, -* 4K with. -* -* 2. Minimizing the number of fatal interrupts serviced, since -* fatal interrupts halt the SCSI I/O processor. Basically, -* this means offloading the practical maximum amount of processing -* to the SCSI chip. -* -* On the NCR53c810/820/720, this is accomplished by using -* interrupt-on-the-fly signals when commands complete, -* and only handling fatal errors and SDTR / WDTR messages -* in the host code. -* -* On the NCR53c710, interrupts are generated as on the NCR53c8x0, -* only the lack of a interrupt-on-the-fly facility complicates -* things. Also, SCSI ID registers and commands are -* bit fielded rather than binary encoded. -* -* On the NCR53c700 and NCR53c700-66, operations that are done via -* indirect, table mode on the more advanced chips must be -* replaced by calls through a jump table which -* acts as a surrogate for the DSA. Unfortunately, this -* will mean that we must service an interrupt for each -* disconnect/reconnect. -* -* 3. Eliminating latency by pipelining operations at the different levels. -* -* This driver allows a configurable number of commands to be enqueued -* for each target/lun combination (experimentally, I have discovered -* that two seems to work best) and will ultimately allow for -* SCSI-II tagged queuing. -* -* -* Architecture : -* This driver is built around a Linux queue of commands waiting to -* be executed, and a shared Linux/NCR array of commands to start. Commands -* are transferred to the array by the run_process_issue_queue() function -* which is called whenever a command completes. -* -* As commands are completed, the interrupt routine is triggered, -* looks for commands in the linked list of completed commands with -* valid status, removes these commands from a list of running commands, -* calls the done routine, and flags their target/luns as not busy. -* -* Due to limitations in the intelligence of the NCR chips, certain -* concessions are made. In many cases, it is easier to dynamically -* generate/fix-up code rather than calculate on the NCR at run time. -* So, code is generated or fixed up for -* -* - Handling data transfers, using a variable number of MOVE instructions -* interspersed with CALL MSG_IN, WHEN MSGIN instructions. -* -* The DATAIN and DATAOUT routines are separate, so that an incorrect -* direction can be trapped, and space isn't wasted. -* -* It may turn out that we're better off using some sort -* of table indirect instruction in a loop with a variable -* sized table on the NCR53c710 and newer chips. -* -* - Checking for reselection (NCR53c710 and better) -* -* - Handling the details of SCSI context switches (NCR53c710 and better), -* such as reprogramming appropriate synchronous parameters, -* removing the dsa structure from the NCR's queue of outstanding -* commands, etc. -* -*/ - -#include <linux/module.h> - - -#include <linux/types.h> -#include <asm/setup.h> -#include <asm/dma.h> -#include <asm/io.h> -#include <asm/system.h> -#include <linux/delay.h> -#include <linux/signal.h> -#include <linux/sched.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/slab.h> -#include <linux/vmalloc.h> -#include <linux/mm.h> -#include <linux/ioport.h> -#include <linux/time.h> -#include <linux/blkdev.h> -#include <linux/spinlock.h> -#include <linux/interrupt.h> -#include <asm/pgtable.h> - -#ifdef CONFIG_AMIGA -#include <asm/amigahw.h> -#include <asm/amigaints.h> -#include <asm/irq.h> - -#define BIG_ENDIAN -#define NO_IO_SPACE -#endif - -#ifdef CONFIG_MVME16x -#include <asm/mvme16xhw.h> - -#define BIG_ENDIAN -#define NO_IO_SPACE -#define VALID_IDS -#endif - -#ifdef CONFIG_BVME6000 -#include <asm/bvme6000hw.h> - -#define BIG_ENDIAN -#define NO_IO_SPACE -#define VALID_IDS -#endif - -#include "scsi.h" -#include <scsi/scsi_dbg.h> -#include <scsi/scsi_host.h> -#include <scsi/scsi_transport_spi.h> -#include "53c7xx.h" -#include <linux/stat.h> -#include <linux/stddef.h> - -#ifdef NO_IO_SPACE -/* -* The following make the definitions in 53c7xx.h (write8, etc) smaller, -* we don't have separate i/o space anyway. -*/ -#undef inb -#undef outb -#undef inw -#undef outw -#undef inl -#undef outl -#define inb (x) 1 -#define inw (x) 1 -#define inl (x) 1 -#define outb (x,y) 1 -#define outw (x,y) 1 -#define outl (x,y) 1 -#endif - -static int check_address (unsigned long addr,int size); -static void dump_events (struct Scsi_Host *host,int count); -static Scsi_Cmnd *return_outstanding_commands (struct Scsi_Host *host, -int free,int issue); -static void hard_reset (struct Scsi_Host *host); -static void ncr_scsi_reset (struct Scsi_Host *host); -static void print_lots (struct Scsi_Host *host); -static void set_synchronous (struct Scsi_Host *host,int target,int sxfer, -int scntl3,int now_connected); -static int datapath_residual (struct Scsi_Host *host); -static const char *sbcl_to_phase (int sbcl); -static void print_progress (Scsi_Cmnd *cmd); -static void print_queues (struct Scsi_Host *host); -static void process_issue_queue (unsigned long flags); -static int shutdown (struct Scsi_Host *host); -static void abnormal_finished (struct NCR53c7x0_cmd *cmd,int result); -static int disable (struct Scsi_Host *host); -static int NCR53c7xx_run_tests (struct Scsi_Host *host); -static irqreturn_t NCR53c7x0_intr (int irq,void *dev_id); -static void NCR53c7x0_intfly (struct Scsi_Host *host); -static int ncr_halt (struct Scsi_Host *host); -static void intr_phase_mismatch (struct Scsi_Host *host,struct NCR53c7x0_cmd - *cmd); -static void intr_dma (struct Scsi_Host *host,struct NCR53c7x0_cmd *cmd); -static void print_dsa (struct Scsi_Host *host,u32 *dsa, -const char *prefix); -static int print_insn (struct Scsi_Host *host,const u32 *insn, -const char *prefix,int kernel); - -static void NCR53c7xx_dsa_fixup (struct NCR53c7x0_cmd *cmd); -static void NCR53c7x0_init_fixup (struct Scsi_Host *host); -static int NCR53c7x0_dstat_sir_intr (struct Scsi_Host *host,struct -NCR53c7x0_cmd *cmd); -static void NCR53c7x0_soft_reset (struct Scsi_Host *host); - -/* Size of event list (per host adapter) */ -static int track_events =0 ; -static struct Scsi_Host *first_host =NULL ;/* Head of list of NCR boards */ -static struct scsi_host_template *the_template =NULL ; - -/* NCR53c710 script handling code */ - -#include "53c7xx_d.h" -#ifdef A_int_debug_sync -#define DEBUG_SYNC_INTR A_int_debug_sync -#endif -int NCR53c7xx_script_len =sizeof (SCRIPT ); -int NCR53c7xx_dsa_len = A_dsa_end + Ent_dsa_zero - Ent_dsa_code_template; -#ifdef FORCE_DSA_ALIGNMENT -int CmdPageStart = (0 - Ent_dsa_zero -sizeof (struct NCR53c7x0_cmd )) &0xff ; -#endif - -static char *setup_strings[] = - {"" ,"" ,"" ,"" ,"" ,"" ,"" ,"" }; - -#define MAX_SETUP_STRINGS ARRAY_SIZE(setup_strings) -#define SETUP_BUFFER_SIZE 200 -static char setup_buffer[SETUP_BUFFER_SIZE ]; -static char setup_used[MAX_SETUP_STRINGS ]; - -void ncr53c7xx_setup (char *str,int *ints) -{ -int i; -char *p1, *p2; - - p1 = setup_buffer; - *p1 ='\0' ; -if (str) -strncpy (p1, str,SETUP_BUFFER_SIZE -strlen (setup_buffer)); - setup_buffer[SETUP_BUFFER_SIZE -1 ] ='\0' ; - p1 = setup_buffer; - i =0 ; -while (*p1 && (i <MAX_SETUP_STRINGS )) { - p2 =strchr (p1,',' ); -if (p2) { - *p2 ='\0' ; -if (p1 != p2) - setup_strings[i] = p1; - p1 = p2 +1 ; - i++; - } -else { - setup_strings[i] = p1; -break ; - } - } -for (i=0 ; i<MAX_SETUP_STRINGS ; i++) - setup_used[i] =0 ; -} - - -/* check_setup_strings() returns index if key found, 0 if not -*/ - -static int check_setup_strings (char *key,int *flags,int *val,char *buf) -{ -int x; -char *cp; - -for (x=0 ; x<MAX_SETUP_STRINGS ; x++) { -if (setup_used[x]) -continue ; -if (!strncmp (setup_strings[x], key,strlen (key))) -break ; -if (!strncmp (setup_strings[x],"next" ,strlen ("next" ))) -return 0 ; - } -if (x ==MAX_SETUP_STRINGS ) -return 0 ; - setup_used[x] =1 ; - cp = setup_strings[x] +strlen (key); - *val =-1 ; -if (*cp !=':' ) -return ++x; - cp++; -if ((*cp >='0' ) && (*cp <='9' )) { - *val =simple_strtoul (cp,NULL ,0 ); - } -return ++x; -} - - - -/* -* KNOWN BUGS : -* - There is some sort of conflict when the PPP driver is compiled with -* support for 16 channels? -* -* - On systems which predate the 1.3.x initialization order change, -* the NCR driver will cause Cannot get free page messages to appear. -* These are harmless, but I don't know of an easy way to avoid them. -* -* - With OPTION_DISCONNECT, on two systems under unknown circumstances, -* we get a PHASE MISMATCH with DSA set to zero (suggests that we -* are occurring somewhere in the reselection code) where -* DSP=some value DCMD|DBC=same value. -* -* Closer inspection suggests that we may be trying to execute -* some portion of the DSA? -* scsi0 : handling residual transfer (+ 0 bytes from DMA FIFO) -* scsi0 : handling residual transfer (+ 0 bytes from DMA FIFO) -* scsi0 : no current command : unexpected phase MSGIN. -* DSP=0x1c46cc, DCMD|DBC=0x1c46ac, DSA=0x0 -* DSPS=0x0, TEMP=0x1c3e70, DMODE=0x80 -* scsi0 : DSP-> -* 001c46cc : 0x001c46cc 0x00000000 -* 001c46d4 : 0x001c5ea0 0x000011f8 -* -* Changed the print code in the phase_mismatch handler so -* that we call print_lots to try to diagnose this. -* -*/ - -/* -* Possible future direction of architecture for max performance : -* -* We're using a single start array for the NCR chip. This is -* sub-optimal, because we cannot add a command which would conflict with -* an executing command to this start queue, and therefore must insert the -* next command for a given I/T/L combination after the first has completed; -* incurring our interrupt latency between SCSI commands. -* -* To allow further pipelining of the NCR and host CPU operation, we want -* to set things up so that immediately on termination of a command destined -* for a given LUN, we get that LUN busy again. -* -* To do this, we need to add a 32 bit pointer to which is jumped to -* on completion of a command. If no new command is available, this -* would point to the usual DSA issue queue select routine. -* -* If one were, it would point to a per-NCR53c7x0_cmd select routine -* which starts execution immediately, inserting the command at the head -* of the start queue if the NCR chip is selected or reselected. -* -* We would change so that we keep a list of outstanding commands -* for each unit, rather than a single running_list. We'd insert -* a new command into the right running list; if the NCR didn't -* have something running for that yet, we'd put it in the -* start queue as well. Some magic needs to happen to handle the -* race condition between the first command terminating before the -* new one is written. -* -* Potential for profiling : -* Call do_gettimeofday(struct timeval *tv) to get 800ns resolution. -*/ - - -/* -* TODO : -* 1. To support WIDE transfers, not much needs to happen. We -* should do CHMOVE instructions instead of MOVEs when -* we have scatter/gather segments of uneven length. When -* we do this, we need to handle the case where we disconnect -* between segments. -* -* 2. Currently, when Icky things happen we do a FATAL(). Instead, -* we want to do an integrity check on the parts of the NCR hostdata -* structure which were initialized at boot time; FATAL() if that -* fails, and otherwise try to recover. Keep track of how many -* times this has happened within a single SCSI command; if it -* gets excessive, then FATAL(). -* -* 3. Parity checking is currently disabled, and a few things should -* happen here now that we support synchronous SCSI transfers : -* 1. On soft-reset, we shoould set the EPC (Enable Parity Checking) -* and AAP (Assert SATN/ on parity error) bits in SCNTL0. -* -* 2. We should enable the parity interrupt in the SIEN0 register. -* -* 3. intr_phase_mismatch() needs to believe that message out is -* always an "acceptable" phase to have a mismatch in. If -* the old phase was MSG_IN, we should send a MESSAGE PARITY -* error. If the old phase was something else, we should send -* a INITIATOR_DETECTED_ERROR message. Note that this could -* cause a RESTORE POINTERS message; so we should handle that -* correctly first. Instead, we should probably do an -* initiator_abort. -* -* 4. MPEE bit of CTEST4 should be set so we get interrupted if -* we detect an error. -* -* -* 5. The initial code has been tested on the NCR53c810. I don't -* have access to NCR53c700, 700-66 (Forex boards), NCR53c710 -* (NCR Pentium systems), NCR53c720, NCR53c820, or NCR53c825 boards to -* finish development on those platforms. -* -* NCR53c820/825/720 - need to add wide transfer support, including WDTR -* negotiation, programming of wide transfer capabilities -* on reselection and table indirect selection. -* -* NCR53c710 - need to add fatal interrupt or GEN code for -* command completion signaling. Need to modify all -* SDID, SCID, etc. registers, and table indirect select code -* since these use bit fielded (ie 1<<target) instead of -* binary encoded target ids. Need to accommodate -* different register mappings, probably scan through -* the SCRIPT code and change the non SFBR register operand -* of all MOVE instructions. -* -* It is rather worse than this actually, the 710 corrupts -* both TEMP and DSA when you do a MOVE MEMORY. This -* screws you up all over the place. MOVE MEMORY 4 with a -* destination of DSA seems to work OK, which helps some. -* Richard Hirst [email protected] -* -* NCR53c700/700-66 - need to add code to refix addresses on -* every nexus change, eliminate all table indirect code, -* very messy. -* -* 6. The NCR53c7x0 series is very popular on other platforms that -* could be running Linux - ie, some high performance AMIGA SCSI -* boards use it. -* -* So, I should include #ifdef'd code so that it is -* compatible with these systems. -* -* Specifically, the little Endian assumptions I made in my -* bit fields need to change, and if the NCR doesn't see memory -* the right way, we need to provide options to reverse words -* when the scripts are relocated. -* -* 7. Use vremap() to access memory mapped boards. -*/ - -/* -* Allow for simultaneous existence of multiple SCSI scripts so we -* can have a single driver binary for all of the family. -* -* - one for NCR53c700 and NCR53c700-66 chips (not yet supported) -* - one for rest (only the NCR53c810, 815, 820, and 825 are currently -* supported) -* -* So that we only need two SCSI scripts, we need to modify things so -* that we fixup register accesses in READ/WRITE instructions, and -* we'll also have to accommodate the bit vs. binary encoding of IDs -* with the 7xx chips. -*/ - -#define ROUNDUP (adr,type) \ - ((void *) (((long) (adr) + sizeof(type) - 1) & ~(sizeof(type) - 1))) - - -/* -* Function: issue_to_cmd -* -* Purpose: convert jump instruction in issue array to NCR53c7x0_cmd -* structure pointer. -* -* Inputs; issue - pointer to start of NOP or JUMP instruction -* in issue array. -* -* Returns: pointer to command on success; 0 if opcode is NOP. -*/ - -static inline struct NCR53c7x0_cmd * -issue_to_cmd (struct Scsi_Host *host,struct NCR53c7x0_hostdata *hostdata, -u32 *issue) -{ -return (issue[0 ] != hostdata->NOP_insn) ? -/* -* If the IF TRUE bit is set, it's a JUMP instruction. The -* operand is a bus pointer to the dsa_begin routine for this DSA. The -* dsa field of the NCR53c7x0_cmd structure starts with the -* DSA code template. By converting to a virtual address, -* subtracting the code template size, and offset of the -* dsa field, we end up with a pointer to the start of the -* structure (alternatively, we could use the -* dsa_cmnd field, an anachronism from when we weren't -* sure what the relationship between the NCR structures -* and host structures were going to be. -*/ - (struct NCR53c7x0_cmd *) ((char *)bus_to_virt (issue[1 ]) - - (hostdata->E_dsa_code_begin - hostdata->E_dsa_code_template) - - offsetof(struct NCR53c7x0_cmd , dsa)) -/* If the IF TRUE bit is not set, it's a NOP */ - :NULL ; -} - - -/* -* FIXME: we should junk these, in favor of synchronous_want and -* wide_want in the NCR53c7x0_hostdata structure. -*/ - -/* Template for "preferred" synchronous transfer parameters. */ - -static const unsigned char sdtr_message[] = { -#ifdef CONFIG_SCSI_NCR53C7xx_FAST - EXTENDED_MESSAGE, 3 /* length */, EXTENDED_SDTR, 25 /* *4ns */, 8 /* off */ -#else -EXTENDED_MESSAGE ,3 /* length */ ,EXTENDED_SDTR ,50 /* *4ns */ ,8 /* off */ -#endif -}; - -/* Template to request asynchronous transfers */ - -static const unsigned char async_message[] = { -EXTENDED_MESSAGE ,3 /* length */ ,EXTENDED_SDTR ,0 ,0 /* asynchronous */ -}; - -/* Template for "preferred" WIDE transfer parameters */ - -static const unsigned char wdtr_message[] = { -EXTENDED_MESSAGE ,2 /* length */ ,EXTENDED_WDTR ,1 /* 2^1 bytes */ -}; - -#if 0 -/* -* Function : struct Scsi_Host *find_host (int host) -* -* Purpose : KGDB support function which translates a host number -* to a host structure. -* -* Inputs : host - number of SCSI host -* -* Returns : NULL on failure, pointer to host structure on success. -*/ - -static struct Scsi_Host * -find_host (int host) { -struct Scsi_Host *h; -for (h = first_host; h && h->host_no != host; h = h->next); -if (!h) { -printk (KERN_ALERT "scsi%d not found\n" , host); -return NULL ; - }else if (h->hostt != the_template) { -printk (KERN_ALERT "scsi%d is not a NCR board\n" , host); -return NULL ; - } -return h; -} - -#if 0 -/* -* Function : request_synchronous (int host, int target) -* -* Purpose : KGDB interface which will allow us to negotiate for -* synchronous transfers. This ill be replaced with a more -* integrated function; perhaps a new entry in the scsi_host -* structure, accessible via an ioctl() or perhaps /proc/scsi. -* -* Inputs : host - number of SCSI host; target - number of target. -* -* Returns : 0 when negotiation has been setup for next SCSI command, -* -1 on failure. -*/ - -static int -request_synchronous (int host,int target) { -struct Scsi_Host *h; -struct NCR53c7x0_hostdata *hostdata; -unsigned long flags; -if (target <0 ) { -printk (KERN_ALERT "target %d is bogus\n" , target); -return -1 ; - } -if (!(h =find_host (host))) -return -1 ; -else if (h->this_id == target) { -printk (KERN_ALERT "target %d is host ID\n" , target); -return -1 ; - } -else if (target >= h->max_id) { -printk (KERN_ALERT "target %d exceeds maximum of %d\n" , target, - h->max_id); -return -1 ; - } - hostdata = (struct NCR53c7x0_hostdata *)h->hostdata[0 ]; - -local_irq_save (flags); -if (hostdata->initiate_sdtr & (1 << target)) { -local_irq_restore (flags); -printk (KERN_ALERT "target %d already doing SDTR\n" , target); -return -1 ; - } - hostdata->initiate_sdtr |= (1 << target); -local_irq_restore (flags); -return 0 ; -} -#endif - -/* -* Function : request_disconnect (int host, int on_or_off) -* -* Purpose : KGDB support function, tells us to allow or disallow -* disconnections. -* -* Inputs : host - number of SCSI host; on_or_off - non-zero to allow, -* zero to disallow. -* -* Returns : 0 on success, * -1 on failure. -*/ - -static int -request_disconnect (int host,int on_or_off) { -struct Scsi_Host *h; -struct NCR53c7x0_hostdata *hostdata; -if (!(h =find_host (host))) -return -1 ; - hostdata = (struct NCR53c7x0_hostdata *) h->hostdata[0 ]; -if (on_or_off) - hostdata->options |=OPTION_DISCONNECT ; -else - hostdata->options &= ~OPTION_DISCONNECT ; -return 0 ; -} -#endif - -/* -* Function : static void NCR53c7x0_driver_init (struct Scsi_Host *host) -* -* Purpose : Initialize internal structures, as required on startup, or -* after a SCSI bus reset. -* -* Inputs : host - pointer to this host adapter's structure -*/ - -static void -NCR53c7x0_driver_init (struct Scsi_Host *host) { -struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0 ]; -int i, j; -u32 *ncrcurrent; - -for (i =0 ; i <16 ; ++i) { - hostdata->request_sense[i] =0 ; -for (j =0 ; j <8 ; ++j) - hostdata->busy[i][j] =0 ; -set_synchronous (host, i,/* sxfer */ 0 , hostdata->saved_scntl3,0 ); - } - hostdata->issue_queue =NULL ; - hostdata->running_list = hostdata->finished_queue = - hostdata->ncrcurrent =NULL ; -for (i =0 , ncrcurrent = (u32 *) hostdata->schedule; - i < host->can_queue; ++i, ncrcurrent +=2 ) { - ncrcurrent[0 ] = hostdata->NOP_insn; - ncrcurrent[1 ] =0xdeadbeef ; - } - ncrcurrent[0 ] = ((DCMD_TYPE_TCI |DCMD_TCI_OP_JUMP ) <<24 ) |DBC_TCI_TRUE ; - ncrcurrent[1 ] = (u32 )virt_to_bus (hostdata->script) + - hostdata->E_wait_reselect; - hostdata->reconnect_dsa_head =0 ; - hostdata->addr_reconnect_dsa_head = (u32 ) -virt_to_bus ((void *) &(hostdata->reconnect_dsa_head)); - hostdata->expecting_iid =0 ; - hostdata->expecting_sto =0 ; -if (hostdata->options &OPTION_ALWAYS_SYNCHRONOUS ) - hostdata->initiate_sdtr =0xffff ; -else - hostdata->initiate_sdtr =0 ; - hostdata->talked_to =0 ; - hostdata->idle =1 ; -} - -/* -* Function : static int clock_to_ccf_710 (int clock) -* -* Purpose : Return the clock conversion factor for a given SCSI clock. -* -* Inputs : clock - SCSI clock expressed in Hz. -* -* Returns : ccf on success, -1 on failure. -*/ - -static int -clock_to_ccf_710 (int clock) { -if (clock <=16666666 ) -return -1 ; -if (clock <=25000000 ) -return 2 ;/* Divide by 1.0 */ -else if (clock <=37500000 ) -return 1 ;/* Divide by 1.5 */ -else if (clock <=50000000 ) -return 0 ;/* Divide by 2.0 */ -else if (clock <=66000000 ) -return 3 ;/* Divide by 3.0 */ -else -return -1 ; -} - -/* -* Function : static int NCR53c7x0_init (struct Scsi_Host *host) -* -* Purpose : initialize the internal structures for a given SCSI host -* -* Inputs : host - pointer to this host adapter's structure -* -* Preconditions : when this function is called, the chip_type -* field of the hostdata structure MUST have been set. -* -* Returns : 0 on success, -1 on failure. -*/ - -int -NCR53c7x0_init (struct Scsi_Host *host) { -NCR53c7x0_local_declare (); -int i, ccf; -unsigned char revision; -struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0 ]; -/* -* There are some things which we need to know about in order to provide -* a semblance of support. Print 'em if they aren't what we expect, -* otherwise don't add to the noise. -* -* -1 means we don't know what to expect. -*/ -int val, flags; -char buf[32 ]; -int expected_id =-1 ; -int expected_clock =-1 ; -int uninitialized =0 ; -#ifdef NO_IO_SPACE -int expected_mapping =OPTION_MEMORY_MAPPED ; -#else -int expected_mapping =OPTION_IO_MAPPED ; -#endif -for (i=0 ;i<7 ;i++) - hostdata->valid_ids[i] =1 ;/* Default all ID's to scan */ - -/* Parse commandline flags */ -if (check_setup_strings ("noasync" ,&flags,&val,buf)) - { - hostdata->options |=OPTION_NO_ASYNC ; - hostdata->options &= ~(OPTION_SYNCHRONOUS |OPTION_ALWAYS_SYNCHRONOUS ); - } - -if (check_setup_strings ("nosync" ,&flags,&val,buf)) - { - hostdata->options &= ~(OPTION_SYNCHRONOUS |OPTION_ALWAYS_SYNCHRONOUS ); - } - -if (check_setup_strings ("nodisconnect" ,&flags,&val,buf)) - hostdata->options &= ~OPTION_DISCONNECT ; - -if (check_setup_strings ("validids" ,&flags,&val,buf)) - { -for (i=0 ;i<7 ;i++) - hostdata->valid_ids[i] = val & (1 <<i); - } - -if ((i =check_setup_strings ("next" ,&flags,&val,buf))) - { -while (i) - setup_used[--i] =1 ; - } - -if (check_setup_strings ("opthi" ,&flags,&val,buf)) - hostdata->options = (long long )val <<32 ; -if (check_setup_strings ("optlo" ,&flags,&val,buf)) - hostdata->options |= val; - -NCR53c7x0_local_setup (host); -switch (hostdata->chip) { -case 710 : -case 770 : - hostdata->dstat_sir_intr = NCR53c7x0_dstat_sir_intr; - hostdata->init_save_regs =NULL ; - hostdata->dsa_fixup = NCR53c7xx_dsa_fixup; - hostdata->init_fixup = NCR53c7x0_init_fixup; - hostdata->soft_reset = NCR53c7x0_soft_reset; - hostdata->run_tests = NCR53c7xx_run_tests; - expected_clock = hostdata->scsi_clock; - expected_id =7 ; -break ; -default : -printk ("scsi%d : chip type of %d is not supported yet, detaching.\n" , - host->host_no, hostdata->chip); -scsi_unregister (host); -return -1 ; - } - -/* Assign constants accessed by NCR */ - hostdata->NCR53c7xx_zero =0 ; - hostdata->NCR53c7xx_msg_reject =MESSAGE_REJECT ; - hostdata->NCR53c7xx_msg_abort =ABORT ; - hostdata->NCR53c7xx_msg_nop =NOP ; - hostdata->NOP_insn = (DCMD_TYPE_TCI |DCMD_TCI_OP_JUMP ) <<24 ; -if (expected_mapping ==-1 || - (hostdata->options & (OPTION_MEMORY_MAPPED )) != - (expected_mapping &OPTION_MEMORY_MAPPED )) -printk ("scsi%d : using %s mapped access\n" , host->host_no, - (hostdata->options &OPTION_MEMORY_MAPPED ) ?"memory" : -"io" ); - - hostdata->dmode = (hostdata->chip ==700 || hostdata->chip ==70066 ) ? -DMODE_REG_00 :DMODE_REG_10 ; - hostdata->istat = ((hostdata->chip /100 ) ==8 ) ? -ISTAT_REG_800 :ISTAT_REG_700 ; - -/* We have to assume that this may be the first access to the chip, so -* we must set EA in DCNTL. */ - -NCR53c7x0_write8 (DCNTL_REG ,DCNTL_10_EA |DCNTL_10_COM ); - - -/* Only the ISTAT register is readable when the NCR is running, so make -sure it's halted. */ -ncr_halt (host); - -/* -* XXX - the NCR53c700 uses bitfielded registers for SCID, SDID, etc, -* as does the 710 with one bit per SCSI ID. Conversely, the NCR -* uses a normal, 3 bit binary representation of these values. -* -* Get the rest of the NCR documentation, and FIND OUT where the change -* was. -*/ - -#if 0 -/* May not be able to do this - chip my not have been set up yet */ - tmp = hostdata->this_id_mask =NCR53c7x0_read8 (SCID_REG ); -for (host->this_id =0 ; tmp !=1 ; tmp >>=1 , ++host->this_id); -#else - host->this_id =7 ; -#endif - -/* -* Note : we should never encounter a board setup for ID0. So, -* if we see ID0, assume that it was uninitialized and set it -* to the industry standard 7. -*/ -if (!host->this_id) { -printk ("scsi%d : initiator ID was %d, changing to 7\n" , - host->host_no, host->this_id); - host->this_id =7 ; - hostdata->this_id_mask =1 <<7 ; - uninitialized =1 ; - }; - -if (expected_id ==-1 || host->this_id != expected_id) -printk ("scsi%d : using initiator ID %d\n" , host->host_no, - host->this_id); - -/* -* Save important registers to allow a soft reset. -*/ - -/* -* CTEST7 controls cache snooping, burst mode, and support for -* external differential drivers. This isn't currently used - the -* default value may not be optimal anyway. -* Even worse, it may never have been set up since reset. -*/ - hostdata->saved_ctest7 =NCR53c7x0_read8 (CTEST7_REG ) &CTEST7_SAVE ; - revision = (NCR53c7x0_read8 (CTEST8_REG ) &0xF0 ) >>4 ; -switch (revision) { -case 1 : revision =0 ;break ; -case 2 : revision =1 ;break ; -case 4 : revision =2 ;break ; -case 8 : revision =3 ;break ; -default : revision =255 ;break ; - } -printk ("scsi%d: Revision 0x%x\n" ,host->host_no,revision); - -if ((revision ==0 || revision ==255 ) && (hostdata->options & (OPTION_SYNCHRONOUS |OPTION_DISCONNECT |OPTION_ALWAYS_SYNCHRONOUS ))) - { -printk ("scsi%d: Disabling sync working and disconnect/reselect\n" , - host->host_no); - hostdata->options &= ~(OPTION_SYNCHRONOUS |OPTION_DISCONNECT |OPTION_ALWAYS_SYNCHRONOUS ); - } - -/* -* On NCR53c700 series chips, DCNTL controls the SCSI clock divisor, -* on 800 series chips, it allows for a totem-pole IRQ driver. -* NOTE saved_dcntl currently overwritten in init function. -* The value read here may be garbage anyway, MVME16x board at least -* does not initialise chip if kernel arrived via tftp. -*/ - - hostdata->saved_dcntl =NCR53c7x0_read8 (DCNTL_REG ); - -/* -* DMODE controls DMA burst length, and on 700 series chips, -* 286 mode and bus width -* NOTE: On MVME16x, chip may have been reset, so this could be a -* power-on/reset default value. -*/ - hostdata->saved_dmode =NCR53c7x0_read8 (hostdata->dmode); - -/* -* Now that burst length and enabled/disabled status is known, -* clue the user in on it. -*/ - - ccf =clock_to_ccf_710 (expected_clock); - -for (i =0 ; i <16 ; ++i) - hostdata->cmd_allocated[i] =0 ; - -if (hostdata->init_save_regs) - hostdata->init_save_regs (host); -if (hostdata->init_fixup) - hostdata->init_fixup (host); - -if (!the_template) { - the_template = host->hostt; - first_host = host; - } - -/* -* Linux SCSI drivers have always been plagued with initialization -* problems - some didn't work with the BIOS disabled since they expected -* initialization from it, some didn't work when the networking code -* was enabled and registers got scrambled, etc. -* -* To avoid problems like this, in the future, we will do a soft -* reset on the SCSI chip, taking it back to a sane state. -*/ - - hostdata->soft_reset (host); - -#if 1 - hostdata->debug_count_limit =-1 ; -#else - hostdata->debug_count_limit =1 ; -#endif - hostdata->intrs =-1 ; - hostdata->resets =-1 ; -memcpy ((void *) hostdata->synchronous_want, (void *) sdtr_message, -sizeof (hostdata->synchronous_want)); - -NCR53c7x0_driver_init (host); - -if (request_irq (host->irq, NCR53c7x0_intr,IRQF_SHARED ,"53c7xx" , host)) - { -printk ("scsi%d : IRQ%d not free, detaching\n" , - host->host_no, host->irq); - goto err_unregister; - } - -if ((hostdata->run_tests && hostdata->run_tests (host) ==-1 ) || - (hostdata->options &OPTION_DEBUG_TESTS_ONLY )) { -/* XXX Should disable interrupts, etc. here */ - goto err_free_irq; - }else { -if (host->io_port) { - host->n_io_port =128 ; -if (!request_region (host->io_port, host->n_io_port,"ncr53c7xx" )) - goto err_free_irq; - } - } - -if (NCR53c7x0_read8 (SBCL_REG ) &SBCL_BSY ) { -printk ("scsi%d : bus wedge, doing SCSI reset\n" , host->host_no); -hard_reset (host); - } -return 0 ; - - err_free_irq: -free_irq (host->irq, NCR53c7x0_intr); - err_unregister: -scsi_unregister (host); -return -1 ; -} - -/* -* Function : int ncr53c7xx_init(struct scsi_host_template *tpnt, int board, int chip, -* unsigned long base, int io_port, int irq, int dma, long long options, -* int clock); -* -* Purpose : initializes a NCR53c7,8x0 based on base addresses, -* IRQ, and DMA channel. -* -* Inputs : tpnt - Template for this SCSI adapter, board - board level -* product, chip - 710 -* -* Returns : 0 on success, -1 on failure. -* -*/ - -int -ncr53c7xx_init (struct scsi_host_template *tpnt,int board,int chip, -unsigned long base,int io_port,int irq,int dma, -long long options,int clock) -{ -struct Scsi_Host *instance; -struct NCR53c7x0_hostdata *hostdata; -char chip_str[80 ]; -int script_len =0 , dsa_len =0 , size =0 , max_cmd_size =0 , - schedule_size =0 , ok =0 ; -void *tmp; -unsigned long page; - -switch (chip) { -case 710 : -case 770 : - schedule_size = (tpnt->can_queue +1 ) *8 /* JUMP instruction size */ ; - script_len = NCR53c7xx_script_len; - dsa_len = NCR53c7xx_dsa_len; - options |=OPTION_INTFLY ; -sprintf (chip_str,"NCR53c%d" , chip); -break ; -default : -printk ("scsi-ncr53c7xx : unsupported SCSI chip %d\n" , chip); -return -1 ; - } - -printk ("scsi-ncr53c7xx : %s at memory 0x%lx, io 0x%x, irq %d" , - chip_str, base, io_port, irq); -if (dma ==DMA_NONE ) -printk ("\n" ); -else -printk (", dma %d\n" , dma); - -if (options &OPTION_DEBUG_PROBE_ONLY ) { -printk ("scsi-ncr53c7xx : probe only enabled, aborting initialization\n" ); -return -1 ; - } - - max_cmd_size =sizeof (struct NCR53c7x0_cmd ) + dsa_len + -/* Size of dynamic part of command structure : */ -2 */* Worst case : we don't know if we need DATA IN or DATA out */ - (2 */* Current instructions per scatter/gather segment */ - tpnt->sg_tablesize + -3 /* Current startup / termination required per phase */ - ) * -8 /* Each instruction is eight bytes */ ; - -/* Allocate fixed part of hostdata, dynamic part to hold appropriate -SCSI SCRIPT(tm) plus a single, maximum-sized NCR53c7x0_cmd structure. - -We need a NCR53c7x0_cmd structure for scan_scsis() when we are -not loaded as a module, and when we're loaded as a module, we -can't use a non-dynamically allocated structure because modules -are vmalloc()'d, which can allow structures to cross page -boundaries and breaks our physical/virtual address assumptions -for DMA. - -So, we stick it past the end of our hostdata structure. - -ASSUMPTION : -Regardless of how many simultaneous SCSI commands we allow, -the probe code only executes a _single_ instruction at a time, -so we only need one here, and don't need to allocate NCR53c7x0_cmd -structures for each target until we are no longer in scan_scsis -and kmalloc() has become functional (memory_init() happens -after all device driver initialization). -*/ - - size =sizeof (struct NCR53c7x0_hostdata ) + script_len + -/* Note that alignment will be guaranteed, since we put the command -allocated at probe time after the fixed-up SCSI script, which -consists of 32 bit words, aligned on a 32 bit boundary. But -on a 64bit machine we need 8 byte alignment for hostdata->free, so -we add in another 4 bytes to take care of potential misalignment -*/ - (sizeof (void *) -sizeof (u32)) + max_cmd_size + schedule_size; - - page =__get_free_pages (GFP_ATOMIC ,1 ); -if (page==0 ) - { -printk (KERN_ERR "53c7xx: out of memory.\n" ); -return -ENOMEM ; - } -#ifdef FORCE_DSA_ALIGNMENT -/* -* 53c710 rev.0 doesn't have an add-with-carry instruction. -* Ensure we allocate enough memory to force DSA alignment. -*/ - size +=256 ; -#endif -/* Size should be < 8K, so we can fit it in two pages. */ -if (size >8192 ) { -printk (KERN_ERR "53c7xx: hostdata > 8K\n" ); -return -1 ; - } - - instance =scsi_register (tpnt,4 ); -if (!instance) - { -free_page (page); -return -1 ; - } - instance->hostdata[0 ] = page; -memset ((void *)instance->hostdata[0 ],0 ,8192 ); -cache_push (virt_to_phys ((void *)(instance->hostdata[0 ])),8192 ); -cache_clear (virt_to_phys ((void *)(instance->hostdata[0 ])),8192 ); -kernel_set_cachemode ((void *)instance->hostdata[0 ],8192 ,IOMAP_NOCACHE_SER ); - -/* FIXME : if we ever support an ISA NCR53c7xx based board, we -need to check if the chip is running in a 16 bit mode, and if so -unregister it if it is past the 16M (0x1000000) mark */ - - hostdata = (struct NCR53c7x0_hostdata *)instance->hostdata[0 ]; - hostdata->size = size; - hostdata->script_count = script_len /sizeof (u32); - hostdata->board = board; - hostdata->chip = chip; - -/* -* Being memory mapped is more desirable, since -* -* - Memory accesses may be faster. -* -* - The destination and source address spaces are the same for -* all instructions, meaning we don't have to twiddle dmode or -* any other registers. -* -* So, we try for memory mapped, and if we don't get it, -* we go for port mapped, and that failing we tell the user -* it can't work. -*/ - -if (base) { - instance->base = base; -/* Check for forced I/O mapping */ -if (!(options &OPTION_IO_MAPPED )) { - options |=OPTION_MEMORY_MAPPED ; - ok =1 ; - } - }else { - options &= ~OPTION_MEMORY_MAPPED ; - } - -if (io_port) { - instance->io_port = io_port; - options |=OPTION_IO_MAPPED ; - ok =1 ; - }else { - options &= ~OPTION_IO_MAPPED ; - } - -if (!ok) { -printk ("scsi%d : not initializing, no I/O or memory mapping known \n" , - instance->host_no); -scsi_unregister (instance); -return -1 ; - } - instance->irq = irq; - instance->dma_channel = dma; - - hostdata->options = options; - hostdata->dsa_len = dsa_len; - hostdata->max_cmd_size = max_cmd_size; - hostdata->num_cmds =1 ; - hostdata->scsi_clock = clock; -/* Initialize single command */ - tmp = (hostdata->script + hostdata->script_count); -#ifdef FORCE_DSA_ALIGNMENT - { - void *t = ROUNDUP(tmp, void *); -if (((u32 )t &0xff ) > CmdPageStart) - t = (void *)((u32 )t +255 ); - t = (void *)(((u32 )t & ~0xff ) + CmdPageStart); - hostdata->free = t; -#if 0 -printk ("scsi: Registered size increased by 256 to %d\n" , size); -printk ("scsi: CmdPageStart = 0x%02x\n" , CmdPageStart); -printk ("scsi: tmp = 0x%08x, hostdata->free set to 0x%08x\n" , - (u32 )tmp, (u32 )t); -#endif - } -#else - hostdata->free = ROUNDUP(tmp, void *); -#endif - hostdata->free->real = tmp; - hostdata->free->size = max_cmd_size; - hostdata->free->free =NULL ; - hostdata->free->next =NULL ; - hostdata->extra_allocate =0 ; - -/* Allocate command start code space */ - hostdata->schedule = (chip ==700 || chip ==70066 ) ? -NULL : (u32 *) ((char *)hostdata->free + max_cmd_size); - -/* -* For diagnostic purposes, we don't really care how fast things blaze. -* For profiling, we want to access the 800ns resolution system clock, -* using a 'C' call on the host processor. -* -* Therefore, there's no need for the NCR chip to directly manipulate -* this data, and we should put it wherever is most convenient for -* Linux. -*/ -if (track_events) - hostdata->events = (struct NCR53c7x0_event *) (track_events ? -vmalloc (sizeof (struct NCR53c7x0_event ) * track_events) :NULL ); -else - hostdata->events =NULL ; - -if (hostdata->events) { -memset ((void *) hostdata->events,0 ,sizeof (struct NCR53c7x0_event ) * - track_events); - hostdata->event_size = track_events; - hostdata->event_index =0 ; - }else - hostdata->event_size =0 ; - -return NCR53c7x0_init (instance); -} - - -/* -* Function : static void NCR53c7x0_init_fixup (struct Scsi_Host *host) -* -* Purpose : copy and fixup the SCSI SCRIPTS(tm) code for this device. -* -* Inputs : host - pointer to this host adapter's structure -* -*/ - -static void -NCR53c7x0_init_fixup (struct Scsi_Host *host) { -NCR53c7x0_local_declare (); -struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0 ]; -unsigned char tmp; -int i, ncr_to_memory, memory_to_ncr; -u32 base; -NCR53c7x0_local_setup (host); - - -/* XXX - NOTE : this code MUST be made endian aware */ -/* Copy code into buffer that was allocated at detection time. */ -memcpy ((void *) hostdata->script, (void *)SCRIPT , -sizeof (SCRIPT )); -/* Fixup labels */ -for (i =0 ; i <PATCHES ; ++i) - hostdata->script[LABELPATCHES [i]] += -virt_to_bus (hostdata->script); -/* Fixup addresses of constants that used to be EXTERNAL */ - -patch_abs_32 (hostdata->script,0 , NCR53c7xx_msg_abort, -virt_to_bus (&(hostdata->NCR53c7xx_msg_abort))); -patch_abs_32 (hostdata->script,0 , NCR53c7xx_msg_reject, -virt_to_bus (&(hostdata->NCR53c7xx_msg_reject))); -patch_abs_32 (hostdata->script,0 , NCR53c7xx_zero, -virt_to_bus (&(hostdata->NCR53c7xx_zero))); -patch_abs_32 (hostdata->script,0 , NCR53c7xx_sink, -virt_to_bus (&(hostdata->NCR53c7xx_sink))); -patch_abs_32 (hostdata->script,0 , NOP_insn, -virt_to_bus (&(hostdata->NOP_insn))); -patch_abs_32 (hostdata->script,0 , schedule, -virt_to_bus ((void *) hostdata->schedule)); - -/* Fixup references to external variables: */ -for (i =0 ; i <EXTERNAL_PATCHES_LEN ; ++i) - hostdata->script[EXTERNAL_PATCHES [i].offset] += -virt_to_bus (EXTERNAL_PATCHES [i].address); - -/* -* Fixup absolutes set at boot-time. -* -* All non-code absolute variables suffixed with "dsa_" and "int_" -* are constants, and need no fixup provided the assembler has done -* it for us (I don't know what the "real" NCR assembler does in -* this case, my assembler does the right magic). -*/ - -patch_abs_rwri_data (hostdata->script,0 , dsa_save_data_pointer, - Ent_dsa_code_save_data_pointer - Ent_dsa_zero); -patch_abs_rwri_data (hostdata->script,0 , dsa_restore_pointers, - Ent_dsa_code_restore_pointers - Ent_dsa_zero); -patch_abs_rwri_data (hostdata->script,0 , dsa_check_reselect, - Ent_dsa_code_check_reselect - Ent_dsa_zero); - -/* -* Just for the hell of it, preserve the settings of -* Burst Length and Enable Read Line bits from the DMODE -* register. Make sure SCRIPTS start automagically. -*/ - -#if defined(CONFIG_MVME16x) || defined(CONFIG_BVME6000 ) -/* We know better what we want than 16xBug does! */ - tmp =DMODE_10_BL_8 |DMODE_10_FC2 ; -#else - tmp =NCR53c7x0_read8 (DMODE_REG_10 ); - tmp &= (DMODE_BL_MASK |DMODE_10_FC2 |DMODE_10_FC1 |DMODE_710_PD | -DMODE_710_UO ); -#endif - -if (!(hostdata->options &OPTION_MEMORY_MAPPED )) { - base = (u32 ) host->io_port; - memory_to_ncr = tmp|DMODE_800_DIOM ; - ncr_to_memory = tmp|DMODE_800_SIOM ; - }else { - base =virt_to_bus ((void *)host->base); - memory_to_ncr = ncr_to_memory = tmp; - } - -/* SCRATCHB_REG_10 == SCRATCHA_REG_800, as it happens */ -patch_abs_32 (hostdata->script,0 , addr_scratch, base +SCRATCHA_REG_800 ); -patch_abs_32 (hostdata->script,0 , addr_temp, base +TEMP_REG ); -patch_abs_32 (hostdata->script,0 , addr_dsa, base +DSA_REG ); - -/* -* I needed some variables in the script to be accessible to -* both the NCR chip and the host processor. For these variables, -* I made the arbitrary decision to store them directly in the -* hostdata structure rather than in the RELATIVE area of the -* SCRIPTS. -*/ - - -patch_abs_rwri_data (hostdata->script,0 , dmode_memory_to_memory, tmp); -patch_abs_rwri_data (hostdata->script,0 , dmode_memory_to_ncr, memory_to_ncr); -patch_abs_rwri_data (hostdata->script,0 , dmode_ncr_to_memory, ncr_to_memory); - -patch_abs_32 (hostdata->script,0 , msg_buf, -virt_to_bus ((void *)&(hostdata->msg_buf))); -patch_abs_32 (hostdata->script,0 , reconnect_dsa_head, -virt_to_bus ((void *)&(hostdata->reconnect_dsa_head))); -patch_abs_32 (hostdata->script,0 , addr_reconnect_dsa_head, -virt_to_bus ((void *)&(hostdata->addr_reconnect_dsa_head))); -patch_abs_32 (hostdata->script,0 , reselected_identify, -virt_to_bus ((void *)&(hostdata->reselected_identify))); -/* reselected_tag is currently unused */ -#if 0 -patch_abs_32 (hostdata->script,0 , reselected_tag, -virt_to_bus ((void *)&(hostdata->reselected_tag))); -#endif - -patch_abs_32 (hostdata->script,0 , test_dest, -virt_to_bus ((void *)&hostdata->test_dest)); -patch_abs_32 (hostdata->script,0 , test_src, -virt_to_bus (&hostdata->test_source)); -patch_abs_32 (hostdata->script,0 , saved_dsa, -virt_to_bus ((void *)&hostdata->saved2_dsa)); -patch_abs_32 (hostdata->script,0 , emulfly, -virt_to_bus ((void *)&hostdata->emulated_intfly)); - -patch_abs_rwri_data (hostdata->script,0 , dsa_check_reselect, - (unsigned char )(Ent_dsa_code_check_reselect - Ent_dsa_zero)); - -/* These are for event logging; the ncr_event enum contains the -actual interrupt numbers. */ -#ifdef A_int_EVENT_SELECT -patch_abs_32 (hostdata->script,0 , int_EVENT_SELECT, (u32 )EVENT_SELECT ); -#endif -#ifdef A_int_EVENT_DISCONNECT -patch_abs_32 (hostdata->script,0 , int_EVENT_DISCONNECT, (u32 )EVENT_DISCONNECT ); -#endif -#ifdef A_int_EVENT_RESELECT -patch_abs_32 (hostdata->script,0 , int_EVENT_RESELECT, (u32 )EVENT_RESELECT ); -#endif -#ifdef A_int_EVENT_COMPLETE -patch_abs_32 (hostdata->script,0 , int_EVENT_COMPLETE, (u32 )EVENT_COMPLETE ); -#endif -#ifdef A_int_EVENT_IDLE -patch_abs_32 (hostdata->script,0 , int_EVENT_IDLE, (u32 )EVENT_IDLE ); -#endif -#ifdef A_int_EVENT_SELECT_FAILED -patch_abs_32 (hostdata->script,0 , int_EVENT_SELECT_FAILED, - (u32 )EVENT_SELECT_FAILED ); -#endif -#ifdef A_int_EVENT_BEFORE_SELECT -patch_abs_32 (hostdata->script,0 , int_EVENT_BEFORE_SELECT, - (u32 )EVENT_BEFORE_SELECT ); -#endif -#ifdef A_int_EVENT_RESELECT_FAILED -patch_abs_32 (hostdata->script,0 , int_EVENT_RESELECT_FAILED, - (u32 )EVENT_RESELECT_FAILED ); -#endif - -/* -* Make sure the NCR and Linux code agree on the location of -* certain fields. -*/ - - hostdata->E_accept_message = Ent_accept_message; - hostdata->E_command_complete = Ent_command_complete; - hostdata->E_cmdout_cmdout = Ent_cmdout_cmdout; - hostdata->E_data_transfer = Ent_data_transfer; - hostdata->E_debug_break = Ent_debug_break; - hostdata->E_dsa_code_template = Ent_dsa_code_template; - hostdata->E_dsa_code_template_end = Ent_dsa_code_template_end; - hostdata->E_end_data_transfer = Ent_end_data_transfer; - hostdata->E_initiator_abort = Ent_initiator_abort; - hostdata->E_msg_in = Ent_msg_in; - hostdata->E_other_transfer = Ent_other_transfer; - hostdata->E_other_in = Ent_other_in; - hostdata->E_other_out = Ent_other_out; - hostdata->E_reject_message = Ent_reject_message; - hostdata->E_respond_message = Ent_respond_message; - hostdata->E_select = Ent_select; - hostdata->E_select_msgout = Ent_select_msgout; - hostdata->E_target_abort = Ent_target_abort; -#ifdef Ent_test_0 - hostdata->E_test_0 = Ent_test_0; -#endif - hostdata->E_test_1 = Ent_test_1; - hostdata->E_test_2 = Ent_test_2; -#ifdef Ent_test_3 - hostdata->E_test_3 = Ent_test_3; -#endif - hostdata->E_wait_reselect = Ent_wait_reselect; - hostdata->E_dsa_code_begin = Ent_dsa_code_begin; - - hostdata->dsa_cmdout = A_dsa_cmdout; - hostdata->dsa_cmnd = A_dsa_cmnd; - hostdata->dsa_datain = A_dsa_datain; - hostdata->dsa_dataout = A_dsa_dataout; - hostdata->dsa_end = A_dsa_end; - hostdata->dsa_msgin = A_dsa_msgin; - hostdata->dsa_msgout = A_dsa_msgout; - hostdata->dsa_msgout_other = A_dsa_msgout_other; - hostdata->dsa_next = A_dsa_next; - hostdata->dsa_select = A_dsa_select; - hostdata->dsa_start = Ent_dsa_code_template - Ent_dsa_zero; - hostdata->dsa_status = A_dsa_status; - hostdata->dsa_jump_dest = Ent_dsa_code_fix_jump - Ent_dsa_zero + -8 /* destination operand */ ; - -/* sanity check */ -if (A_dsa_fields_start != Ent_dsa_code_template_end - - Ent_dsa_zero) -printk ("scsi%d : NCR dsa_fields start is %d not %d\n" , - host->host_no, A_dsa_fields_start, Ent_dsa_code_template_end - - Ent_dsa_zero); - -printk ("scsi%d : NCR code relocated to 0x%lx (virt 0x%p)\n" , host->host_no, -virt_to_bus (hostdata->script), hostdata->script); -} - -/* -* Function : static int NCR53c7xx_run_tests (struct Scsi_Host *host) -* -* Purpose : run various verification tests on the NCR chip, -* including interrupt generation, and proper bus mastering -* operation. -* -* Inputs : host - a properly initialized Scsi_Host structure -* -* Preconditions : the NCR chip must be in a halted state. -* -* Returns : 0 if all tests were successful, -1 on error. -* -*/ - -static int -NCR53c7xx_run_tests (struct Scsi_Host *host) { -NCR53c7x0_local_declare (); -struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0 ]; -unsigned long timeout; -u32 start; -int failed, i; -unsigned long flags; -NCR53c7x0_local_setup (host); - -/* The NCR chip _must_ be idle to run the test scripts */ - -local_irq_save (flags); -if (!hostdata->idle) { -printk ("scsi%d : chip not idle, aborting tests\n" , host->host_no); -local_irq_restore (flags); -return -1 ; - } - -/* -* Check for functional interrupts, this could work as an -* autoprobe routine. -*/ - -if ((hostdata->options &OPTION_DEBUG_TEST1 ) && - hostdata->state !=STATE_DISABLED ) { - hostdata->idle =0 ; - hostdata->test_running =1 ; - hostdata->test_completed =-1 ; - hostdata->test_dest =0 ; - hostdata->test_source =0xdeadbeef ; - start =virt_to_bus (hostdata->script) + hostdata->E_test_1; - hostdata->state =STATE_RUNNING ; -printk ("scsi%d : test 1" , host->host_no); -NCR53c7x0_write32 (DSP_REG , start); -if (hostdata->options &OPTION_DEBUG_TRACE ) -NCR53c7x0_write8 (DCNTL_REG , hostdata->saved_dcntl |DCNTL_SSM | -DCNTL_STD ); -printk (" started\n" ); -local_irq_restore (flags); - -/* -* This is currently a .5 second timeout, since (in theory) no slow -* board will take that long. In practice, we've seen one -* pentium which occassionally fails with this, but works with -* 10 times as much? -*/ - - timeout = jiffies +5 *HZ /10 ; -while ((hostdata->test_completed ==-1 ) &&time_before (jiffies, timeout)) -barrier (); - - failed =1 ; -if (hostdata->test_completed ==-1 ) -printk ("scsi%d : driver test 1 timed out%s\n" ,host->host_no , - (hostdata->test_dest ==0xdeadbeef ) ? -" due to lost interrupt.\n" -" Please verify that the correct IRQ is being used for your board,\n" - :"" ); -else if (hostdata->test_completed !=1 ) -printk ("scsi%d : test 1 bad interrupt value (%d)\n" , - host->host_no, hostdata->test_completed); -else - failed = (hostdata->test_dest !=0xdeadbeef ); - -if (hostdata->test_dest !=0xdeadbeef ) { -printk ("scsi%d : driver test 1 read 0x%x instead of 0xdeadbeef indicating a\n" -" probable cache invalidation problem. Please configure caching\n" -" as write-through or disabled\n" , - host->host_no, hostdata->test_dest); - } - -if (failed) { -printk ("scsi%d : DSP = 0x%p (script at 0x%p, start at 0x%x)\n" , - host->host_no,bus_to_virt (NCR53c7x0_read32 (DSP_REG )), - hostdata->script, start); -printk ("scsi%d : DSPS = 0x%x\n" , host->host_no, -NCR53c7x0_read32 (DSPS_REG )); -local_irq_restore (flags); -return -1 ; - } - hostdata->test_running =0 ; - } - -if ((hostdata->options &OPTION_DEBUG_TEST2 ) && - hostdata->state !=STATE_DISABLED ) { -u32 dsa[48 ]; -unsigned char identify =IDENTIFY (0 ,0 ); -unsigned char cmd[6 ]; -unsigned char data[36 ]; -unsigned char status =0xff ; -unsigned char msg =0xff ; - - cmd[0 ] =INQUIRY ; - cmd[1 ] = cmd[2 ] = cmd[3 ] = cmd[5 ] =0 ; - cmd[4 ] =sizeof (data); - - dsa[2 ] =1 ; - dsa[3 ] =virt_to_bus (&identify); - dsa[4 ] =6 ; - dsa[5 ] =virt_to_bus (&cmd); - dsa[6 ] =sizeof (data); - dsa[7 ] =virt_to_bus (&data); - dsa[8 ] =1 ; - dsa[9 ] =virt_to_bus (&status); - dsa[10 ] =1 ; - dsa[11 ] =virt_to_bus (&msg); - -for (i =0 ; i <6 ; ++i) { -#ifdef VALID_IDS -if (!hostdata->valid_ids[i]) -continue ; -#endif -local_irq_disable (); -if (!hostdata->idle) { -printk ("scsi%d : chip not idle, aborting tests\n" , host->host_no); -local_irq_restore (flags); -return -1 ; - } - -/* 710: bit mapped scsi ID, async */ - dsa[0 ] = (1 << i) <<16 ; - hostdata->idle =0 ; - hostdata->test_running =2 ; - hostdata->test_completed =-1 ; - start =virt_to_bus (hostdata->script) + hostdata->E_test_2; - hostdata->state =STATE_RUNNING ; -NCR53c7x0_write32 (DSA_REG ,virt_to_bus (dsa)); -NCR53c7x0_write32 (DSP_REG , start); -if (hostdata->options &OPTION_DEBUG_TRACE ) -NCR53c7x0_write8 (DCNTL_REG , hostdata->saved_dcntl | -DCNTL_SSM |DCNTL_STD ); -local_irq_restore (flags); - - timeout = jiffies +5 *HZ ;/* arbitrary */ -while ((hostdata->test_completed ==-1 ) &&time_before (jiffies, timeout)) -barrier (); - -NCR53c7x0_write32 (DSA_REG ,0 ); - -if (hostdata->test_completed ==2 ) { - data[35 ] =0 ; -printk ("scsi%d : test 2 INQUIRY to target %d, lun 0 : %s\n" , - host->host_no, i, data +8 ); -printk ("scsi%d : status " , host->host_no); -scsi_print_status (status); -printk ("\nscsi%d : message " , host->host_no); -spi_print_msg (&msg); -printk ("\n" ); - }else if (hostdata->test_completed ==3 ) { -printk ("scsi%d : test 2 no connection with target %d\n" , - host->host_no, i); -if (!hostdata->idle) { -printk ("scsi%d : not idle\n" , host->host_no); -local_irq_restore (flags); -return -1 ; - } - }else if (hostdata->test_completed ==-1 ) { -printk ("scsi%d : test 2 timed out\n" , host->host_no); -local_irq_restore (flags); -return -1 ; - } - hostdata->test_running =0 ; - } - } - -local_irq_restore (flags); -return 0 ; -} - -/* -* Function : static void NCR53c7xx_dsa_fixup (struct NCR53c7x0_cmd *cmd) -* -* Purpose : copy the NCR53c8xx dsa structure into cmd's dsa buffer, -* performing all necessary relocation. -* -* Inputs : cmd, a NCR53c7x0_cmd structure with a dsa area large -* enough to hold the NCR53c8xx dsa. -*/ - -static void -NCR53c7xx_dsa_fixup (struct NCR53c7x0_cmd *cmd) { -Scsi_Cmnd *c = cmd->cmd; -struct Scsi_Host *host = c->device->host; -struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0 ]; -int i; - -memcpy (cmd->dsa, hostdata->script + (hostdata->E_dsa_code_template /4 ), - hostdata->E_dsa_code_template_end - hostdata->E_dsa_code_template); - -/* -* Note : within the NCR 'C' code, dsa points to the _start_ -* of the DSA structure, and _not_ the offset of dsa_zero within -* that structure used to facilitate shorter signed offsets -* for the 8 bit ALU. -* -* The implications of this are that -* -* - 32 bit A_dsa_* absolute values require an additional -* dsa_zero added to their value to be correct, since they are -* relative to dsa_zero which is in essentially a separate -* space from the code symbols. -* -* - All other symbols require no special treatment. -*/ - -patch_abs_tci_data (cmd->dsa, Ent_dsa_code_template /sizeof (u32), - dsa_temp_lun, c->device->lun); -patch_abs_32 (cmd->dsa, Ent_dsa_code_template /sizeof (u32), - dsa_temp_addr_next,virt_to_bus (&cmd->dsa_next_addr)); -patch_abs_32 (cmd->dsa, Ent_dsa_code_template /sizeof (u32), - dsa_temp_next,virt_to_bus (cmd->dsa) + Ent_dsa_zero - - Ent_dsa_code_template + A_dsa_next); -patch_abs_32 (cmd->dsa, Ent_dsa_code_template /sizeof (u32), - dsa_temp_sync,virt_to_bus ((void *)hostdata->sync[c->device->id].script)); -patch_abs_32 (cmd->dsa, Ent_dsa_code_template /sizeof (u32), - dsa_sscf_710,virt_to_bus ((void *)&hostdata->sync[c->device->id].sscf_710)); -patch_abs_tci_data (cmd->dsa, Ent_dsa_code_template /sizeof (u32), - dsa_temp_target,1 << c->device->id); -/* XXX - new pointer stuff */ -patch_abs_32 (cmd->dsa, Ent_dsa_code_template /sizeof (u32), - dsa_temp_addr_saved_pointer,virt_to_bus (&cmd->saved_data_pointer)); -patch_abs_32 (cmd->dsa, Ent_dsa_code_template /sizeof (u32), - dsa_temp_addr_saved_residual,virt_to_bus (&cmd->saved_residual)); -patch_abs_32 (cmd->dsa, Ent_dsa_code_template /sizeof (u32), - dsa_temp_addr_residual,virt_to_bus (&cmd->residual)); - -/* XXX - new start stuff */ - -patch_abs_32 (cmd->dsa, Ent_dsa_code_template /sizeof (u32), - dsa_temp_addr_dsa_value,virt_to_bus (&cmd->dsa_addr)); -} - -/* -* Function : run_process_issue_queue (void) -* -* Purpose : insure that the coroutine is running and will process our -* request. process_issue_queue_running is checked/set here (in an -* inline function) rather than in process_issue_queue itself to reduce -* the chances of stack overflow. -* -*/ - -static volatile int process_issue_queue_running =0 ; - -static __inline__void -run_process_issue_queue (void ) { -unsigned long flags; -local_irq_save (flags); -if (!process_issue_queue_running) { - process_issue_queue_running =1 ; -process_issue_queue (flags); -/* -* process_issue_queue_running is cleared in process_issue_queue -* once it can't do more work, and process_issue_queue exits with -* interrupts disabled. -*/ - } -local_irq_restore (flags); -} - -/* -* Function : static void abnormal_finished (struct NCR53c7x0_cmd *cmd, int -* result) -* -* Purpose : mark SCSI command as finished, OR'ing the host portion -* of the result word into the result field of the corresponding -* Scsi_Cmnd structure, and removing it from the internal queues. -* -* Inputs : cmd - command, result - entire result field -* -* Preconditions : the NCR chip should be in a halted state when -* abnormal_finished is run, since it modifies structures which -* the NCR expects to have exclusive access to. -*/ - -static void -abnormal_finished (struct NCR53c7x0_cmd *cmd,int result) { -Scsi_Cmnd *c = cmd->cmd; -struct Scsi_Host *host = c->device->host; -struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0 ]; -unsigned long flags; -int left, found; -volatile struct NCR53c7x0_cmd * linux_search; -volatile struct NCR53c7x0_cmd *volatile *linux_prev; -volatile u32 *ncr_prev, *ncrcurrent, ncr_search; - -#if 0 -printk ("scsi%d: abnormal finished\n" , host->host_no); -#endif - -local_irq_save (flags); - found =0 ; -/* -* Traverse the NCR issue array until we find a match or run out -* of instructions. Instructions in the NCR issue array are -* either JUMP or NOP instructions, which are 2 words in length. -*/ - - -for (found =0 , left = host->can_queue, ncrcurrent = hostdata->schedule; - left >0 ; --left, ncrcurrent +=2 ) - { -if (issue_to_cmd (host, hostdata, (u32 *) ncrcurrent) == cmd) - { - ncrcurrent[0 ] = hostdata->NOP_insn; - ncrcurrent[1 ] =0xdeadbeef ; - ++found; -break ; - } - } - -/* -* Traverse the NCR reconnect list of DSA structures until we find -* a pointer to this dsa or have found too many command structures. -* We let prev point at the next field of the previous element or -* head of the list, so we don't do anything different for removing -* the head element. -*/ - -for (left = host->can_queue, - ncr_search = hostdata->reconnect_dsa_head, - ncr_prev = &hostdata->reconnect_dsa_head; - left >=0 && ncr_search && - ((char *)bus_to_virt (ncr_search) + hostdata->dsa_start) - != (char *) cmd->dsa; - ncr_prev = (u32 *) ((char *)bus_to_virt (ncr_search) + - hostdata->dsa_next), ncr_search = *ncr_prev, --left); - -if (left <0 ) -printk ("scsi%d: loop detected in ncr reconncect list\n" , - host->host_no); -else if (ncr_search) { -if (found) -printk ("scsi%d: scsi %ld in ncr issue array and reconnect lists\n" , - host->host_no, c->pid); -else { -volatile u32 * next = (u32 *) - ((char *)bus_to_virt (ncr_search) + hostdata->dsa_next); - *ncr_prev = *next; -/* If we're at the tail end of the issue queue, update that pointer too. */ - found =1 ; - } - } - -/* -* Traverse the host running list until we find this command or discover -* we have too many elements, pointing linux_prev at the next field of the -* linux_previous element or head of the list, search at this element. -*/ - -for (left = host->can_queue, linux_search = hostdata->running_list, - linux_prev = &hostdata->running_list; - left >=0 && linux_search && linux_search != cmd; - linux_prev = &(linux_search->next), - linux_search = linux_search->next, --left); - -if (left <0 ) -printk ("scsi%d: loop detected in host running list for scsi pid %ld\n" , - host->host_no, c->pid); -else if (linux_search) { - *linux_prev = linux_search->next; - --hostdata->busy[c->device->id][c->device->lun]; - } - -/* Return the NCR command structure to the free list */ - cmd->next = hostdata->free; - hostdata->free = cmd; - c->host_scribble =NULL ; - -/* And return */ - c->result = result; - c->scsi_done (c); - -local_irq_restore (flags); -run_process_issue_queue (); -} - -/* -* Function : static void intr_break (struct Scsi_Host *host, -* struct NCR53c7x0_cmd *cmd) -* -* Purpose : Handler for breakpoint interrupts from a SCSI script -* -* Inputs : host - pointer to this host adapter's structure, -* cmd - pointer to the command (if any) dsa was pointing -* to. -* -*/ - -static void -intr_break (struct Scsi_Host *host,struct -NCR53c7x0_cmd *cmd) { -NCR53c7x0_local_declare (); -struct NCR53c7x0_break *bp; -#if 0 -Scsi_Cmnd *c = cmd ? cmd->cmd :NULL ; -#endif -u32 *dsp; -struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0 ]; -unsigned long flags; -NCR53c7x0_local_setup (host); - -/* -* Find the break point corresponding to this address, and -* dump the appropriate debugging information to standard -* output. -*/ -local_irq_save (flags); - dsp = (u32 *)bus_to_virt (NCR53c7x0_read32 (DSP_REG )); -for (bp = hostdata->breakpoints; bp && bp->address != dsp; - bp = bp->next); -if (!bp) -panic ("scsi%d : break point interrupt from %p with no breakpoint!" , - host->host_no, dsp); - -/* -* Configure the NCR chip for manual start mode, so that we can -* point the DSP register at the instruction that follows the -* INT int_debug_break instruction. -*/ - -NCR53c7x0_write8 (hostdata->dmode, -NCR53c7x0_read8 (hostdata->dmode)|DMODE_MAN ); - -/* -* And update the DSP register, using the size of the old -* instruction in bytes. -*/ - -local_irq_restore (flags); -} -/* -* Function : static void print_synchronous (const char *prefix, -* const unsigned char *msg) -* -* Purpose : print a pretty, user and machine parsable representation -* of a SDTR message, including the "real" parameters, data -* clock so we can tell transfer rate at a glance. -* -* Inputs ; prefix - text to prepend, msg - SDTR message (5 bytes) -*/ - -static void -print_synchronous (const char *prefix,const unsigned char *msg) { -if (msg[4 ]) { -int Hz =1000000000 / (msg[3 ] *4 ); -int integer = Hz /1000000 ; -int fraction = (Hz - (integer *1000000 )) /10000 ; -printk ("%speriod %dns offset %d %d.%02dMHz %s SCSI%s\n" , - prefix, (int ) msg[3 ] *4 , (int ) msg[4 ], integer, fraction, - (((msg[3 ] *4 ) <200 ) ?"FAST" :"synchronous" ), - (((msg[3 ] *4 ) <200 ) ?"-II" :"" )); - }else -printk ("%sasynchronous SCSI\n" , prefix); -} - -/* -* Function : static void set_synchronous (struct Scsi_Host *host, -* int target, int sxfer, int scntl3, int now_connected) -* -* Purpose : reprogram transfers between the selected SCSI initiator and -* target with the given register values; in the indirect -* select operand, reselection script, and chip registers. -* -* Inputs : host - NCR53c7,8xx SCSI host, target - number SCSI target id, -* sxfer and scntl3 - NCR registers. now_connected - if non-zero, -* we should reprogram the registers now too. -* -* NOTE: For 53c710, scntl3 is actually used for SCF bits from -* SBCL, as we don't have a SCNTL3. -*/ - -static void -set_synchronous (struct Scsi_Host *host,int target,int sxfer,int scntl3, -int now_connected) { -NCR53c7x0_local_declare (); -struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0 ]; -u32 *script; -NCR53c7x0_local_setup (host); - -/* These are eight bit registers */ - sxfer &=0xff ; - scntl3 &=0xff ; - - hostdata->sync[target].sxfer_sanity = sxfer; - hostdata->sync[target].scntl3_sanity = scntl3; - -/* -* HARD CODED : synchronous script is EIGHT words long. This -* must agree with 53c7.8xx.h -*/ - -if ((hostdata->chip !=700 ) && (hostdata->chip !=70066 )) { - hostdata->sync[target].select_indirect = (1 << target) <<16 | - (sxfer <<8 ); - hostdata->sync[target].sscf_710 = scntl3; - - script = (u32 *) hostdata->sync[target].script; - -/* XXX - add NCR53c7x0 code to reprogram SCF bits if we want to */ - script[0 ] = ((DCMD_TYPE_RWRI |DCMD_RWRI_OPC_MODIFY | -DCMD_RWRI_OP_MOVE ) <<24 ) | - (SBCL_REG <<16 ) | (scntl3 <<8 ); - script[1 ] =0 ; - script +=2 ; - - script[0 ] = ((DCMD_TYPE_RWRI |DCMD_RWRI_OPC_MODIFY | -DCMD_RWRI_OP_MOVE ) <<24 ) | - (SXFER_REG <<16 ) | (sxfer <<8 ); - script[1 ] =0 ; - script +=2 ; - -#ifdef DEBUG_SYNC_INTR -if (hostdata->options &OPTION_DEBUG_DISCONNECT ) { - script[0 ] = ((DCMD_TYPE_TCI |DCMD_TCI_OP_INT ) <<24 ) |DBC_TCI_TRUE ; - script[1 ] =DEBUG_SYNC_INTR ; - script +=2 ; - } -#endif - - script[0 ] = ((DCMD_TYPE_TCI |DCMD_TCI_OP_RETURN ) <<24 ) |DBC_TCI_TRUE ; - script[1 ] =0 ; - script +=2 ; - } - -if (hostdata->options &OPTION_DEBUG_SYNCHRONOUS ) -printk ("scsi%d : target %d sync parameters are sxfer=0x%x, scntl3=0x%x\n" , - host->host_no, target, sxfer, scntl3); - -if (now_connected) { -NCR53c7x0_write8 (SBCL_REG , scntl3); -NCR53c7x0_write8 (SXFER_REG , sxfer); - } -} - - -/* -* Function : static int asynchronous (struct Scsi_Host *host, int target) -* -* Purpose : reprogram between the selected SCSI Host adapter and target -* (assumed to be currently connected) for asynchronous transfers. -* -* Inputs : host - SCSI host structure, target - numeric target ID. -* -* Preconditions : the NCR chip should be in one of the halted states -*/ - -static void -asynchronous (struct Scsi_Host *host,int target) { -NCR53c7x0_local_declare (); -struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0 ]; -NCR53c7x0_local_setup (host); -set_synchronous (host, target,/* no offset */ 0 , hostdata->saved_scntl3, -1 ); -printk ("scsi%d : setting target %d to asynchronous SCSI\n" , - host->host_no, target); -} - -/* -* XXX - do we want to go out of our way (ie, add extra code to selection -* in the NCR53c710/NCR53c720 script) to reprogram the synchronous -* conversion bits, or can we be content in just setting the -* sxfer bits? I chose to do so [[email protected]] -*/ - -/* Table for NCR53c8xx synchronous values */ - -/* This table is also correct for 710, allowing that scf=4 is equivalent -* of SSCF=0 (ie use DCNTL, divide by 3) for a 50.01-66.00MHz clock. -* For any other clock values, we cannot use entries with SCF values of -* 4. I guess that for a 66MHz clock, the slowest it will set is 2MHz, -* and for a 50MHz clock, the slowest will be 2.27Mhz. Should check -* that a device doesn't try and negotiate sync below these limits! -*/ - -static const struct { -int div;/* Total clock divisor * 10 */ -unsigned char scf;/* */ -unsigned char tp;/* 4 + tp = xferp divisor */ -} syncs[] = { -/* div scf tp div scf tp div scf tp */ - {40 ,1 ,0 }, {50 ,1 ,1 }, {60 ,1 ,2 }, - {70 ,1 ,3 }, {75 ,2 ,1 }, {80 ,1 ,4 }, - {90 ,1 ,5 }, {100 ,1 ,6 }, {105 ,2 ,3 }, - {110 ,1 ,7 }, {120 ,2 ,4 }, {135 ,2 ,5 }, - {140 ,3 ,3 }, {150 ,2 ,6 }, {160 ,3 ,4 }, - {165 ,2 ,7 }, {180 ,3 ,5 }, {200 ,3 ,6 }, - {210 ,4 ,3 }, {220 ,3 ,7 }, {240 ,4 ,4 }, - {270 ,4 ,5 }, {300 ,4 ,6 }, {330 ,4 ,7 } -}; - -/* -* Function : static void synchronous (struct Scsi_Host *host, int target, -* char *msg) -* -* Purpose : reprogram transfers between the selected SCSI initiator and -* target for synchronous SCSI transfers such that the synchronous -* offset is less than that requested and period at least as long -* as that requested. Also modify *msg such that it contains -* an appropriate response. -* -* Inputs : host - NCR53c7,8xx SCSI host, target - number SCSI target id, -* msg - synchronous transfer request. -*/ - - -static void -synchronous (struct Scsi_Host *host,int target,char *msg) { -struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0 ]; -int desire, divisor, i, limit; -unsigned char scntl3, sxfer; -/* The diagnostic message fits on one line, even with max. width integers */ -char buf[80 ]; - -/* Desired transfer clock in Hz */ - desire =1000000000L / (msg[3 ] *4 ); -/* Scale the available SCSI clock by 10 so we get tenths */ - divisor = (hostdata->scsi_clock *10 ) / desire; - -/* NCR chips can handle at most an offset of 8 */ -if (msg[4 ] >8 ) - msg[4 ] =8 ; - -if (hostdata->options &OPTION_DEBUG_SDTR ) -printk ("scsi%d : optimal synchronous divisor of %d.%01d\n" , - host->host_no, divisor /10 , divisor %10 ); - - limit =ARRAY_SIZE (syncs) -1 ; -for (i =0 ; (i < limit) && (divisor > syncs[i].div); ++i); - -if (hostdata->options &OPTION_DEBUG_SDTR ) -printk ("scsi%d : selected synchronous divisor of %d.%01d\n" , - host->host_no, syncs[i].div /10 , syncs[i].div %10 ); - - msg[3 ] = ((1000000000L / hostdata->scsi_clock) * syncs[i].div /10 /4 ); - -if (hostdata->options &OPTION_DEBUG_SDTR ) -printk ("scsi%d : selected synchronous period of %dns\n" , host->host_no, - msg[3 ] *4 ); - - scntl3 = syncs[i].scf; - sxfer = (msg[4 ] <<SXFER_MO_SHIFT ) | (syncs[i].tp <<4 ); -if (hostdata->options &OPTION_DEBUG_SDTR ) -printk ("scsi%d : sxfer=0x%x scntl3=0x%x\n" , - host->host_no, (int ) sxfer, (int ) scntl3); -set_synchronous (host, target, sxfer, scntl3,1 ); -sprintf (buf,"scsi%d : setting target %d to " , host->host_no, target); -print_synchronous (buf, msg); -} - -/* -* Function : static int NCR53c7x0_dstat_sir_intr (struct Scsi_Host *host, -* struct NCR53c7x0_cmd *cmd) -* -* Purpose : Handler for INT generated instructions for the -* NCR53c810/820 SCSI SCRIPT -* -* Inputs : host - pointer to this host adapter's structure, -* cmd - pointer to the command (if any) dsa was pointing -* to. -* -*/ - -static int -NCR53c7x0_dstat_sir_intr (struct Scsi_Host *host,struct -NCR53c7x0_cmd *cmd) { -NCR53c7x0_local_declare (); -int print; -Scsi_Cmnd *c = cmd ? cmd->cmd :NULL ; -struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0 ]; -u32 dsps,*dsp;/* Argument of the INT instruction */ - -NCR53c7x0_local_setup (host); - dsps =NCR53c7x0_read32 (DSPS_REG ); - dsp = (u32 *)bus_to_virt (NCR53c7x0_read32 (DSP_REG )); - -/* RGH 150597: Frig. Commands which fail with Check Condition are -* Flagged as successful - hack dsps to indicate check condition */ -#if 0 -/* RGH 200597: Need to disable for BVME6000, as it gets Check Conditions -* and then dies. Seems to handle Check Condition at startup, but -* not mid kernel build. */ -if (dsps == A_int_norm_emulateintfly && cmd && cmd->result ==2 ) - dsps = A_int_err_check_condition; -#endif - -if (hostdata->options &OPTION_DEBUG_INTR ) -printk ("scsi%d : DSPS = 0x%x\n" , host->host_no, dsps); - -switch (dsps) { -case A_int_msg_1: - print =1 ; -switch (hostdata->msg_buf[0 ]) { -/* -* Unless we've initiated synchronous negotiation, I don't -* think that this should happen. -*/ -case MESSAGE_REJECT : - hostdata->dsp = hostdata->script + hostdata->E_accept_message / -sizeof (u32); - hostdata->dsp_changed =1 ; -if (cmd && (cmd->flags &CMD_FLAG_SDTR )) { -printk ("scsi%d : target %d rejected SDTR\n" , host->host_no, - c->device->id); - cmd->flags &= ~CMD_FLAG_SDTR ; -asynchronous (host, c->device->id); - print =0 ; - } -break ; -case INITIATE_RECOVERY : -printk ("scsi%d : extended contingent allegiance not supported yet, rejecting\n" , - host->host_no); -/* Fall through to default */ - hostdata->dsp = hostdata->script + hostdata->E_reject_message / -sizeof (u32); - hostdata->dsp_changed =1 ; -break ; -default : -printk ("scsi%d : unsupported message, rejecting\n" , - host->host_no); - hostdata->dsp = hostdata->script + hostdata->E_reject_message / -sizeof (u32); - hostdata->dsp_changed =1 ; - } -if (print) { -printk ("scsi%d : received message" , host->host_no); -if (c) -printk (" from target %d lun %d " , c->device->id, c->device->lun); -spi_print_msg ((unsigned char *) hostdata->msg_buf); -printk ("\n" ); - } - -return SPECIFIC_INT_NOTHING ; - - -case A_int_msg_sdtr: -/* -* At this point, hostdata->msg_buf contains -* 0 EXTENDED MESSAGE -* 1 length -* 2 SDTR -* 3 period * 4ns -* 4 offset -*/ - -if (cmd) { -char buf[80 ]; -sprintf (buf,"scsi%d : target %d %s " , host->host_no, c->device->id, - (cmd->flags &CMD_FLAG_SDTR ) ?"accepting" :"requesting" ); -print_synchronous (buf, (unsigned char *) hostdata->msg_buf); - -/* -* Initiator initiated, won't happen unless synchronous -* transfers are enabled. If we get a SDTR message in -* response to our SDTR, we should program our parameters -* such that -* offset <= requested offset -* period >= requested period -*/ -if (cmd->flags &CMD_FLAG_SDTR ) { - cmd->flags &= ~CMD_FLAG_SDTR ; -if (hostdata->msg_buf[4 ]) -synchronous (host, c->device->id, (unsigned char *) - hostdata->msg_buf); -else -asynchronous (host, c->device->id); - hostdata->dsp = hostdata->script + hostdata->E_accept_message / -sizeof (u32); - hostdata->dsp_changed =1 ; -return SPECIFIC_INT_NOTHING ; - }else { -if (hostdata->options &OPTION_SYNCHRONOUS ) { - cmd->flags |=CMD_FLAG_DID_SDTR ; -synchronous (host, c->device->id, (unsigned char *) - hostdata->msg_buf); - }else { - hostdata->msg_buf[4 ] =0 ;/* 0 offset = async */ -asynchronous (host, c->device->id); - } -patch_dsa_32 (cmd->dsa, dsa_msgout_other,0 ,5 ); -patch_dsa_32 (cmd->dsa, dsa_msgout_other,1 , (u32 ) -virt_to_bus ((void *)&hostdata->msg_buf)); - hostdata->dsp = hostdata->script + - hostdata->E_respond_message /sizeof (u32); - hostdata->dsp_changed =1 ; - } -return SPECIFIC_INT_NOTHING ; - } -/* Fall through to abort if we couldn't find a cmd, and -therefore a dsa structure to twiddle */ -case A_int_msg_wdtr: - hostdata->dsp = hostdata->script + hostdata->E_reject_message / -sizeof (u32); - hostdata->dsp_changed =1 ; -return SPECIFIC_INT_NOTHING ; -case A_int_err_unexpected_phase: -if (hostdata->options &OPTION_DEBUG_INTR ) -printk ("scsi%d : unexpected phase\n" , host->host_no); -return SPECIFIC_INT_ABORT ; -case A_int_err_selected: -if ((hostdata->chip /100 ) ==8 ) -printk ("scsi%d : selected by target %d\n" , host->host_no, - (int )NCR53c7x0_read8 (SDID_REG_800 ) &7 ); -else -printk ("scsi%d : selected by target LCRC=0x%02x\n" , host->host_no, - (int )NCR53c7x0_read8 (LCRC_REG_10 )); - hostdata->dsp = hostdata->script + hostdata->E_target_abort / -sizeof (u32); - hostdata->dsp_changed =1 ; -return SPECIFIC_INT_NOTHING ; -case A_int_err_unexpected_reselect: -if ((hostdata->chip /100 ) ==8 ) -printk ("scsi%d : unexpected reselect by target %d lun %d\n" , - host->host_no, (int )NCR53c7x0_read8 (SDID_REG_800 ) &7 , - hostdata->reselected_identify &7 ); -else -printk ("scsi%d : unexpected reselect LCRC=0x%02x\n" , host->host_no, - (int )NCR53c7x0_read8 (LCRC_REG_10 )); - hostdata->dsp = hostdata->script + hostdata->E_initiator_abort / -sizeof (u32); - hostdata->dsp_changed =1 ; -return SPECIFIC_INT_NOTHING ; -/* -* Since contingent allegiance conditions are cleared by the next -* command issued to a target, we must issue a REQUEST SENSE -* command after receiving a CHECK CONDITION status, before -* another command is issued. -* -* Since this NCR53c7x0_cmd will be freed after use, we don't -* care if we step on the various fields, so modify a few things. -*/ -case A_int_err_check_condition: -#if 0 -if (hostdata->options &OPTION_DEBUG_INTR ) -#endif -printk ("scsi%d : CHECK CONDITION\n" , host->host_no); -if (!c) { -printk ("scsi%d : CHECK CONDITION with no SCSI command\n" , - host->host_no); -return SPECIFIC_INT_PANIC ; - } - -/* -* FIXME : this uses the normal one-byte selection message. -* We may want to renegotiate for synchronous & WIDE transfers -* since these could be the crux of our problem. -* -hostdata->NOP_insn* FIXME : once SCSI-II tagged queuing is implemented, we'll -* have to set this up so that the rest of the DSA -* agrees with this being an untagged queue'd command. -*/ - -patch_dsa_32 (cmd->dsa, dsa_msgout,0 ,1 ); - -/* -* Modify the table indirect for COMMAND OUT phase, since -* Request Sense is a six byte command. -*/ - -patch_dsa_32 (cmd->dsa, dsa_cmdout,0 ,6 ); - -/* -* The CDB is now mirrored in our local non-cached -* structure, but keep the old structure up to date as well, -* just in case anyone looks at it. -*/ - -/* -* XXX Need to worry about data buffer alignment/cache state -* XXX here, but currently never get A_int_err_check_condition, -* XXX so ignore problem for now. -*/ - cmd->cmnd[0 ] = c->cmnd[0 ] =REQUEST_SENSE ; - cmd->cmnd[0 ] = c->cmnd[1 ] &=0xe0 ;/* Zero all but LUN */ - cmd->cmnd[0 ] = c->cmnd[2 ] =0 ; - cmd->cmnd[0 ] = c->cmnd[3 ] =0 ; - cmd->cmnd[0 ] = c->cmnd[4 ] =sizeof (c->sense_buffer); - cmd->cmnd[0 ] = c->cmnd[5 ] =0 ; - -/* -* Disable dataout phase, and program datain to transfer to the -* sense buffer, and add a jump to other_transfer after the -* command so overflow/underrun conditions are detected. -*/ - -patch_dsa_32 (cmd->dsa, dsa_dataout,0 , -virt_to_bus (hostdata->script) + hostdata->E_other_transfer); -patch_dsa_32 (cmd->dsa, dsa_datain,0 , -virt_to_bus (cmd->data_transfer_start)); - cmd->data_transfer_start[0 ] = (((DCMD_TYPE_BMI |DCMD_BMI_OP_MOVE_I | -DCMD_BMI_IO )) <<24 ) |sizeof (c->sense_buffer); - cmd->data_transfer_start[1 ] = (u32 )virt_to_bus (c->sense_buffer); - - cmd->data_transfer_start[2 ] = ((DCMD_TYPE_TCI |DCMD_TCI_OP_JUMP ) - <<24 ) |DBC_TCI_TRUE ; - cmd->data_transfer_start[3 ] = (u32 )virt_to_bus (hostdata->script) + - hostdata->E_other_transfer; - -/* -* Currently, this command is flagged as completed, ie -* it has valid status and message data. Reflag it as -* incomplete. Q - need to do something so that original -* status, etc are used. -*/ - - cmd->result = cmd->cmd->result =0xffff ; - -/* -* Restart command as a REQUEST SENSE. -*/ - hostdata->dsp = (u32 *) hostdata->script + hostdata->E_select / -sizeof (u32); - hostdata->dsp_changed =1 ; -return SPECIFIC_INT_NOTHING ; -case A_int_debug_break: -return SPECIFIC_INT_BREAK ; -case A_int_norm_aborted: - hostdata->dsp = (u32 *) hostdata->schedule; - hostdata->dsp_changed =1 ; -if (cmd) -abnormal_finished (cmd,DID_ERROR <<16 ); -return SPECIFIC_INT_NOTHING ; -case A_int_norm_emulateintfly: -NCR53c7x0_intfly (host); -return SPECIFIC_INT_NOTHING ; -case A_int_test_1: -case A_int_test_2: - hostdata->idle =1 ; - hostdata->test_completed = (dsps - A_int_test_1) /0x00010000 +1 ; -if (hostdata->options &OPTION_DEBUG_INTR ) -printk ("scsi%d : test%d complete\n" , host->host_no, - hostdata->test_completed); -return SPECIFIC_INT_NOTHING ; -#ifdef A_int_debug_reselected_ok -case A_int_debug_reselected_ok: -if (hostdata->options & (OPTION_DEBUG_SCRIPT |OPTION_DEBUG_INTR | -OPTION_DEBUG_DISCONNECT )) { -/* -* Note - this dsa is not based on location relative to -* the command structure, but to location relative to the -* DSA register -*/ -u32 *dsa; - dsa = (u32 *)bus_to_virt (NCR53c7x0_read32 (DSA_REG )); - -printk ("scsi%d : reselected_ok (DSA = 0x%x (virt 0x%p)\n" , - host->host_no,NCR53c7x0_read32 (DSA_REG ), dsa); -printk ("scsi%d : resume address is 0x%x (virt 0x%p)\n" , - host->host_no, cmd->saved_data_pointer, -bus_to_virt (cmd->saved_data_pointer)); -print_insn (host, hostdata->script + Ent_reselected_ok / -sizeof (u32),"" ,1 ); -if ((hostdata->chip /100 ) ==8 ) -printk ("scsi%d : sxfer=0x%x, scntl3=0x%x\n" , - host->host_no,NCR53c7x0_read8 (SXFER_REG ), -NCR53c7x0_read8 (SCNTL3_REG_800 )); -else -printk ("scsi%d : sxfer=0x%x, cannot read SBCL\n" , - host->host_no,NCR53c7x0_read8 (SXFER_REG )); -if (c) { -print_insn (host, (u32 *) - hostdata->sync[c->device->id].script,"" ,1 ); -print_insn (host, (u32 *) - hostdata->sync[c->device->id].script +2 ,"" ,1 ); - } - } -return SPECIFIC_INT_RESTART ; -#endif -#ifdef A_int_debug_reselect_check -case A_int_debug_reselect_check: -if (hostdata->options & (OPTION_DEBUG_SCRIPT |OPTION_DEBUG_INTR )) { -u32 *dsa; -#if 0 -u32 *code; -#endif -/* -* Note - this dsa is not based on location relative to -* the command structure, but to location relative to the -* DSA register -*/ - dsa =bus_to_virt (NCR53c7x0_read32 (DSA_REG )); -printk ("scsi%d : reselected_check_next (DSA = 0x%lx (virt 0x%p))\n" , - host->host_no,virt_to_bus (dsa), dsa); -if (dsa) { -printk ("scsi%d : resume address is 0x%x (virt 0x%p)\n" , - host->host_no, cmd->saved_data_pointer, -bus_to_virt (cmd->saved_data_pointer)); -#if 0 -printk ("scsi%d : template code :\n" , host->host_no); -for (code = dsa + (Ent_dsa_code_check_reselect - Ent_dsa_zero) - /sizeof (u32); code < (dsa + Ent_dsa_zero /sizeof (u32)); - code +=print_insn (host, code,"" ,1 )); -#endif - } -print_insn (host, hostdata->script + Ent_reselected_ok / -sizeof (u32),"" ,1 ); - } -return SPECIFIC_INT_RESTART ; -#endif -#ifdef A_int_debug_dsa_schedule -case A_int_debug_dsa_schedule: -if (hostdata->options & (OPTION_DEBUG_SCRIPT |OPTION_DEBUG_INTR )) { -u32 *dsa; -/* -* Note - this dsa is not based on location relative to -* the command structure, but to location relative to the -* DSA register -*/ - dsa = (u32 *)bus_to_virt (NCR53c7x0_read32 (DSA_REG )); -printk ("scsi%d : dsa_schedule (old DSA = 0x%lx (virt 0x%p))\n" , - host->host_no,virt_to_bus (dsa), dsa); -if (dsa) -printk ("scsi%d : resume address is 0x%x (virt 0x%p)\n" -" (temp was 0x%x (virt 0x%p))\n" , - host->host_no, cmd->saved_data_pointer, -bus_to_virt (cmd->saved_data_pointer), -NCR53c7x0_read32 (TEMP_REG ), -bus_to_virt (NCR53c7x0_read32 (TEMP_REG ))); - } -return SPECIFIC_INT_RESTART ; -#endif -#ifdef A_int_debug_scheduled -case A_int_debug_scheduled: -if (hostdata->options & (OPTION_DEBUG_SCRIPT |OPTION_DEBUG_INTR )) { -printk ("scsi%d : new I/O 0x%x (virt 0x%p) scheduled\n" , - host->host_no,NCR53c7x0_read32 (DSA_REG ), -bus_to_virt (NCR53c7x0_read32 (DSA_REG ))); - } -return SPECIFIC_INT_RESTART ; -#endif -#ifdef A_int_debug_idle -case A_int_debug_idle: -if (hostdata->options & (OPTION_DEBUG_SCRIPT |OPTION_DEBUG_INTR )) { -printk ("scsi%d : idle\n" , host->host_no); - } -return SPECIFIC_INT_RESTART ; -#endif -#ifdef A_int_debug_cmd -case A_int_debug_cmd: -if (hostdata->options & (OPTION_DEBUG_SCRIPT |OPTION_DEBUG_INTR )) { -printk ("scsi%d : command sent\n" ); - } -return SPECIFIC_INT_RESTART ; -#endif -#ifdef A_int_debug_dsa_loaded -case A_int_debug_dsa_loaded: -if (hostdata->options & (OPTION_DEBUG_SCRIPT |OPTION_DEBUG_INTR )) { -printk ("scsi%d : DSA loaded with 0x%x (virt 0x%p)\n" , host->host_no, -NCR53c7x0_read32 (DSA_REG ), -bus_to_virt (NCR53c7x0_read32 (DSA_REG ))); - } -return SPECIFIC_INT_RESTART ; -#endif -#ifdef A_int_debug_reselected -case A_int_debug_reselected: -if (hostdata->options & (OPTION_DEBUG_SCRIPT |OPTION_DEBUG_INTR | -OPTION_DEBUG_DISCONNECT )) { -if ((hostdata->chip /100 ) ==8 ) -printk ("scsi%d : reselected by target %d lun %d\n" , - host->host_no, (int )NCR53c7x0_read8 (SDID_REG_800 ) & ~0x80 , - (int ) hostdata->reselected_identify &7 ); -else -printk ("scsi%d : reselected by LCRC=0x%02x lun %d\n" , - host->host_no, (int )NCR53c7x0_read8 (LCRC_REG_10 ), - (int ) hostdata->reselected_identify &7 ); -print_queues (host); - } -return SPECIFIC_INT_RESTART ; -#endif -#ifdef A_int_debug_disconnect_msg -case A_int_debug_disconnect_msg: -if (hostdata->options & (OPTION_DEBUG_SCRIPT |OPTION_DEBUG_INTR )) { -if (c) -printk ("scsi%d : target %d lun %d disconnecting\n" , - host->host_no, c->device->id, c->device->lun); -else -printk ("scsi%d : unknown target disconnecting\n" , - host->host_no); - } -return SPECIFIC_INT_RESTART ; -#endif -#ifdef A_int_debug_disconnected -case A_int_debug_disconnected: -if (hostdata->options & (OPTION_DEBUG_SCRIPT |OPTION_DEBUG_INTR | -OPTION_DEBUG_DISCONNECT )) { -printk ("scsi%d : disconnected, new queues are\n" , - host->host_no); -print_queues (host); -#if 0 -/* Not valid on ncr53c710! */ -printk ("scsi%d : sxfer=0x%x, scntl3=0x%x\n" , - host->host_no,NCR53c7x0_read8 (SXFER_REG ), -NCR53c7x0_read8 (SCNTL3_REG_800 )); -#endif -if (c) { -print_insn (host, (u32 *) - hostdata->sync[c->device->id].script,"" ,1 ); -print_insn (host, (u32 *) - hostdata->sync[c->device->id].script +2 ,"" ,1 ); - } - } -return SPECIFIC_INT_RESTART ; -#endif -#ifdef A_int_debug_panic -case A_int_debug_panic: -printk ("scsi%d : int_debug_panic received\n" , host->host_no); -print_lots (host); -return SPECIFIC_INT_PANIC ; -#endif -#ifdef A_int_debug_saved -case A_int_debug_saved: -if (hostdata->options & (OPTION_DEBUG_SCRIPT |OPTION_DEBUG_INTR | -OPTION_DEBUG_DISCONNECT )) { -printk ("scsi%d : saved data pointer 0x%x (virt 0x%p)\n" , - host->host_no, cmd->saved_data_pointer, -bus_to_virt (cmd->saved_data_pointer)); -print_progress (c); - } -return SPECIFIC_INT_RESTART ; -#endif -#ifdef A_int_debug_restored -case A_int_debug_restored: -if (hostdata->options & (OPTION_DEBUG_SCRIPT |OPTION_DEBUG_INTR | -OPTION_DEBUG_DISCONNECT )) { -if (cmd) { -int size; -printk ("scsi%d : restored data pointer 0x%x (virt 0x%p)\n" , - host->host_no, cmd->saved_data_pointer,bus_to_virt ( - cmd->saved_data_pointer)); - size =print_insn (host, (u32 *) -bus_to_virt (cmd->saved_data_pointer),"" ,1 ); - size =print_insn (host, (u32 *) -bus_to_virt (cmd->saved_data_pointer) + size,"" ,1 ); -print_progress (c); - } -#if 0 -printk ("scsi%d : datapath residual %d\n" , - host->host_no,datapath_residual (host)) ; -#endif - } -return SPECIFIC_INT_RESTART ; -#endif -#ifdef A_int_debug_sync -case A_int_debug_sync: -if (hostdata->options & (OPTION_DEBUG_SCRIPT |OPTION_DEBUG_INTR | -OPTION_DEBUG_DISCONNECT |OPTION_DEBUG_SDTR )) { -unsigned char sxfer =NCR53c7x0_read8 (SXFER_REG ), scntl3; -if ((hostdata->chip /100 ) ==8 ) { - scntl3 =NCR53c7x0_read8 (SCNTL3_REG_800 ); -if (c) { -if (sxfer != hostdata->sync[c->device->id].sxfer_sanity || - scntl3 != hostdata->sync[c->device->id].scntl3_sanity) { -printk ("scsi%d : sync sanity check failed sxfer=0x%x, scntl3=0x%x" , - host->host_no, sxfer, scntl3); -NCR53c7x0_write8 (SXFER_REG , sxfer); -NCR53c7x0_write8 (SCNTL3_REG_800 , scntl3); - } - }else -printk ("scsi%d : unknown command sxfer=0x%x, scntl3=0x%x\n" , - host->host_no, (int ) sxfer, (int ) scntl3); - }else { -if (c) { -if (sxfer != hostdata->sync[c->device->id].sxfer_sanity) { -printk ("scsi%d : sync sanity check failed sxfer=0x%x" , - host->host_no, sxfer); -NCR53c7x0_write8 (SXFER_REG , sxfer); -NCR53c7x0_write8 (SBCL_REG , - hostdata->sync[c->device->id].sscf_710); - } - }else -printk ("scsi%d : unknown command sxfer=0x%x\n" , - host->host_no, (int ) sxfer); - } - } -return SPECIFIC_INT_RESTART ; -#endif -#ifdef A_int_debug_datain -case A_int_debug_datain: -if (hostdata->options & (OPTION_DEBUG_SCRIPT |OPTION_DEBUG_INTR | -OPTION_DEBUG_DISCONNECT |OPTION_DEBUG_SDTR )) { -int size; -if ((hostdata->chip /100 ) ==8 ) -printk ("scsi%d : In do_datain (%s) sxfer=0x%x, scntl3=0x%x\n" -" datapath residual=%d\n" , - host->host_no,sbcl_to_phase (NCR53c7x0_read8 (SBCL_REG )), - (int )NCR53c7x0_read8 (SXFER_REG ), - (int )NCR53c7x0_read8 (SCNTL3_REG_800 ), -datapath_residual (host)) ; -else -printk ("scsi%d : In do_datain (%s) sxfer=0x%x\n" -" datapath residual=%d\n" , - host->host_no,sbcl_to_phase (NCR53c7x0_read8 (SBCL_REG )), - (int )NCR53c7x0_read8 (SXFER_REG ), -datapath_residual (host)) ; -print_insn (host, dsp,"" ,1 ); - size =print_insn (host, (u32 *)bus_to_virt (dsp[1 ]),"" ,1 ); -print_insn (host, (u32 *)bus_to_virt (dsp[1 ]) + size,"" ,1 ); - } -return SPECIFIC_INT_RESTART ; -#endif -#ifdef A_int_debug_check_dsa -case A_int_debug_check_dsa: -if (NCR53c7x0_read8 (SCNTL1_REG ) &SCNTL1_CON ) { -int sdid; -int tmp; -char *where; -if (hostdata->chip /100 ==8 ) - sdid =NCR53c7x0_read8 (SDID_REG_800 ) &15 ; -else { - tmp =NCR53c7x0_read8 (SDID_REG_700 ); -if (!tmp) -panic ("SDID_REG_700 = 0" ); - tmp >>=1 ; - sdid =0 ; -while (tmp) { - tmp >>=1 ; - sdid++; - } - } - where = dsp -NCR53c7x0_insn_size (NCR53c7x0_read8 - (DCMD_REG )) == hostdata->script + - Ent_select_check_dsa /sizeof (u32) ? -"selection" :"reselection" ; -if (c && sdid != c->device->id) { -printk ("scsi%d : SDID target %d != DSA target %d at %s\n" , - host->host_no, sdid, c->device->id, where); -print_lots (host); -dump_events (host,20 ); -return SPECIFIC_INT_PANIC ; - } - } -return SPECIFIC_INT_RESTART ; -#endif -default : -if ((dsps &0xff000000 ) ==0x03000000 ) { -printk ("scsi%d : misc debug interrupt 0x%x\n" , - host->host_no, dsps); -return SPECIFIC_INT_RESTART ; - }else if ((dsps &0xff000000 ) ==0x05000000 ) { -if (hostdata->events) { -struct NCR53c7x0_event *event; - ++hostdata->event_index; -if (hostdata->event_index >= hostdata->event_size) - hostdata->event_index =0 ; - event = (struct NCR53c7x0_event *) hostdata->events + - hostdata->event_index; - event->event = (enum ncr_event ) dsps; - event->dsa =bus_to_virt (NCR53c7x0_read32 (DSA_REG )); -if (NCR53c7x0_read8 (SCNTL1_REG ) &SCNTL1_CON ) { -if (hostdata->chip /100 ==8 ) - event->target =NCR53c7x0_read8 (SSID_REG_800 ); -else { -unsigned char tmp, sdid; - tmp =NCR53c7x0_read8 (SDID_REG_700 ); -if (!tmp) -panic ("SDID_REG_700 = 0" ); - tmp >>=1 ; - sdid =0 ; -while (tmp) { - tmp >>=1 ; - sdid++; - } - event->target = sdid; - } - } -else - event->target =255 ; - -if (event->event ==EVENT_RESELECT ) - event->lun = hostdata->reselected_identify &0xf ; -else if (c) - event->lun = c->device->lun; -else - event->lun =255 ; -do_gettimeofday (&(event->time)); -if (c) { - event->pid = c->pid; -memcpy ((void *) event->cmnd, (void *) c->cmnd, -sizeof (event->cmnd)); - }else { - event->pid =-1 ; - } - } -return SPECIFIC_INT_RESTART ; - } - -printk ("scsi%d : unknown user interrupt 0x%x\n" , - host->host_no, (unsigned ) dsps); - return SPECIFIC_INT_PANIC; - } -} - -/* -* XXX - the stock NCR assembler won't output the scriptu.h file, -* which undefine's all #define'd CPP symbols from the script.h -* file, which will create problems if you use multiple scripts -* with the same symbol names. -* -* If you insist on using NCR's assembler, you could generate -* scriptu.h from script.h using something like -* -* grep #define script.h | \ -* sed 's/#define[ ][ ]*\([_a-zA-Z][_a-zA-Z0-9]*\).*$/#undefine \1/' \ -* > scriptu.h -*/ - -#include "53c7xx_u.h" - -/* XXX - add alternate script handling code here */ - - -/* -* Function : static void NCR537xx_soft_reset (struct Scsi_Host *host) -* -* Purpose : perform a soft reset of the NCR53c7xx chip -* -* Inputs : host - pointer to this host adapter's structure -* -* Preconditions : NCR53c7x0_init must have been called for this -* host. -* -*/ - -static void -NCR53c7x0_soft_reset (struct Scsi_Host *host) { -NCR53c7x0_local_declare (); -unsigned long flags; -struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0 ]; -NCR53c7x0_local_setup (host); - -local_irq_save (flags); - -/* Disable scsi chip and s/w level 7 ints */ - -#ifdef CONFIG_MVME16x -if (MACH_IS_MVME16x) - { -volatile unsigned long v; - - v = *(volatile unsigned long *)0xfff4006c ; - v &= ~0x8000 ; - *(volatile unsigned long *)0xfff4006c = v; - v = *(volatile unsigned long *)0xfff4202c ; - v &= ~0x10 ; - *(volatile unsigned long *)0xfff4202c = v; - } -#endif -/* Anything specific for your hardware? */ - -/* -* Do a soft reset of the chip so that everything is -* reinitialized to the power-on state. -* -* Basically follow the procedure outlined in the NCR53c700 -* data manual under Chapter Six, How to Use, Steps Necessary to -* Start SCRIPTS, with the exception of actually starting the -* script and setting up the synchronous transfer gunk. -*/ - -/* Should we reset the scsi bus here??????????????????? */ - -NCR53c7x0_write8 (ISTAT_REG_700 ,ISTAT_10_SRST ); -NCR53c7x0_write8 (ISTAT_REG_700 ,0 ); - -/* -* saved_dcntl is set up in NCR53c7x0_init() before it is overwritten -* here. We should have some better way of working out the CF bit -* setting.. -*/ - - hostdata->saved_dcntl =DCNTL_10_EA |DCNTL_10_COM ; -if (hostdata->scsi_clock >50000000 ) - hostdata->saved_dcntl |=DCNTL_700_CF_3 ; -else -if (hostdata->scsi_clock >37500000 ) - hostdata->saved_dcntl |=DCNTL_700_CF_2 ; -#if 0 - else -/* Any clocks less than 37.5MHz? */ -#endif - -if (hostdata->options &OPTION_DEBUG_TRACE ) -NCR53c7x0_write8 (DCNTL_REG , hostdata->saved_dcntl |DCNTL_SSM ); -else -NCR53c7x0_write8 (DCNTL_REG , hostdata->saved_dcntl); -/* Following disables snooping - snooping is not required, as non- -* cached pages are used for shared data, and appropriate use is -* made of cache_push/cache_clear. Indeed, for 68060 -* enabling snooping causes disk corruption of ext2fs free block -* bitmaps and the like. If you have a 68060 with snooping hardwared -* on, then you need to enable CONFIG_060_WRITETHROUGH. -*/ -NCR53c7x0_write8 (CTEST7_REG ,CTEST7_10_TT1 |CTEST7_STD ); -/* Actually burst of eight, according to my 53c710 databook */ -NCR53c7x0_write8 (hostdata->dmode,DMODE_10_BL_8 |DMODE_10_FC2 ); -NCR53c7x0_write8 (SCID_REG ,1 << host->this_id); -NCR53c7x0_write8 (SBCL_REG ,0 ); -NCR53c7x0_write8 (SCNTL1_REG ,SCNTL1_ESR_700 ); -NCR53c7x0_write8 (SCNTL0_REG , ((hostdata->options &OPTION_PARITY ) ? -SCNTL0_EPC :0 ) |SCNTL0_EPG_700 |SCNTL0_ARB1 |SCNTL0_ARB2 ); - -/* -* Enable all interrupts, except parity which we only want when -* the user requests it. -*/ - -NCR53c7x0_write8 (DIEN_REG ,DIEN_700_BF | -DIEN_ABRT |DIEN_SSI |DIEN_SIR |DIEN_700_OPC ); - -NCR53c7x0_write8 (SIEN_REG_700 , ((hostdata->options &OPTION_PARITY ) ? -SIEN_PAR :0 ) |SIEN_700_STO |SIEN_RST |SIEN_UDC | -SIEN_SGE |SIEN_MA );
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