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53c7xx.c：源码内容

/*
* 53c710 driver. Modified from Drew Eckhardts driver
* for 53c810 by Richard Hirst [richard@sleepie.demon.co.uk]
* 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 <alanh@fairlite.demon.co.uk>
* 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
* hm@ix.de
*
* Visionary Computing
* (Unix and Linux consulting and custom programming)
* drew@PoohSticks.ORG
* +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/config.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/blk.h>
#include <linux/spinlock.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 "hosts.h"
#include "53c7xx.h"
#include "constants.h"
#include "sd.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 void NCR53c7x0_intr(int irq, void *dev_id, struct pt_regs * regs);
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 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 (sizeof(setup_strings) / sizeof(char *))
#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 = '';
if (str)
strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer));
setup_buffer[SETUP_BUFFER_SIZE - 1] = '';
p1 = setup_buffer;
i = 0;
while (*p1 && (i < MAX_SETUP_STRINGS)) {
p2 = strchr(p1, ',');
if (p2) {
*p2 = '';
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 richard@sleepie.demon.co.uk
*
* 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 foundn", host);
return NULL;
} else if (h->hostt != the_template) {
printk (KERN_ALERT "scsi%d is not a NCR boardn", 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 bogusn", target);
return -1;
}
if (!(h = find_host (host)))
return -1;
else if (h->this_id == target) {
printk (KERN_ALERT "target %d is host IDn", target);
return -1;
}
else if (target > h->max_id) {
printk (KERN_ALERT "target %d exceeds maximum of %dn", target,
h->max_id);
return -1;
}
hostdata = (struct NCR53c7x0_hostdata *)h->hostdata[0];
save_flags(flags);
cli();
if (hostdata->initiate_sdtr & (1 << target)) {
restore_flags(flags);
printk (KERN_ALERT "target %d already doing SDTRn", target);
return -1;
}
hostdata->initiate_sdtr |= (1 << target);
restore_flags(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 accessn", 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 7n",
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 %dn", 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%xn",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/reselectn",
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, SA_SHIRQ, "53c7xx", host))
{
printk("scsi%d : IRQ%d not free, detachingn",
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 resetn", 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 : static int ncr53c7xx_init(Scsi_Host_Template *tpnt, int board,
* int chip, u32 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 (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 %dn", 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 %dn", dma);
if (options & OPTION_DEBUG_PROBE_ONLY) {
printk ("scsi-ncr53c7xx : probe only enabled, aborting initializationn");
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 > 8Kn");
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 = (unsigned long) 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 %dn", size);
printk ("scsi: CmdPageStart = 0x%02xn", CmdPageStart);
printk ("scsi: tmp = 0x%08x, hostdata->free set to 0x%08xn",
(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(&hostdata->saved2_dsa));
patch_abs_32 (hostdata->script, 0, emulfly,
virt_to_bus(&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 %dn",
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 */
save_flags(flags);
cli();
if (!hostdata->idle) {
printk ("scsi%d : chip not idle, aborting testsn", host->host_no);
restore_flags(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 (" startedn");
restore_flags(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%sn",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 an"
" probable cache invalidation problem. Please configure cachingn"
" as write-through or disabledn",
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%xn", host->host_no,
NCR53c7x0_read32(DSPS_REG));
restore_flags(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
cli();
if (!hostdata->idle) {
printk ("scsi%d : chip not idle, aborting testsn", host->host_no);
restore_flags(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);
restore_flags(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 : %sn",
host->host_no, i, data + 8);
printk ("scsi%d : status ", host->host_no);
print_status (status);
printk ("nscsi%d : message ", host->host_no);
print_msg (&msg);
printk ("n");
} else if (hostdata->test_completed == 3) {
printk("scsi%d : test 2 no connection with target %dn",
host->host_no, i);
if (!hostdata->idle) {
printk("scsi%d : not idlen", host->host_no);
restore_flags(flags);
return -1;
}
} else if (hostdata->test_completed == -1) {
printk ("scsi%d : test 2 timed outn", host->host_no);
restore_flags(flags);
return -1;
}
hostdata->test_running = 0;
}
}
restore_flags(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->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->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->target].script));
patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
dsa_sscf_710, virt_to_bus((void *)&hostdata->sync[c->target].sscf_710));
patch_abs_tci_data (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
dsa_temp_target, 1 << c->target);
/* 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;
save_flags (flags);
cli();
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.
*/
}
restore_flags (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->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 finishedn", host->host_no);
#endif
save_flags(flags);
cli();
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 listn",
host->host_no);
else if (ncr_search) {
if (found)
printk("scsi%d: scsi %ld in ncr issue array and reconnect listsn",
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 %ldn",
host->host_no, c->pid);
else if (linux_search) {
*linux_prev = linux_search->next;
--hostdata->busy[c->target][c->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);
restore_flags(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.
*/
save_flags(flags);
cli();
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.
*/
restore_flags(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%sn",
prefix, (int) msg[3] * 4, (int) msg[4], integer, fraction,
(((msg[3] * 4) < 200) ? "FAST" : "synchronous"),
(((msg[3] * 4) < 200) ? "-II" : ""));
} else
printk ("%sasynchronous SCSIn", 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%xn",
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 SCSIn",
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 [richard@sleepie.demon.co.uk]
*/
/* 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.%01dn",
host->host_no, divisor / 10, divisor % 10);
limit = (sizeof(syncs) / sizeof(syncs[0]) -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.%01dn",
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 %dnsn", 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%xn",
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%xn", 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 SDTRn", host->host_no,
c->target);
cmd->flags &= ~CMD_FLAG_SDTR;
asynchronous (host, c->target);
print = 0;
}
break;
case INITIATE_RECOVERY:
printk ("scsi%d : extended contingent allegiance not supported yet, rejectingn",
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, rejectingn",
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->target, c->lun);
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->target,
(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->target, (unsigned char *)
hostdata->msg_buf);
else
asynchronous (host, c->target);
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->target, (unsigned char *)
hostdata->msg_buf);
} else {
hostdata->msg_buf[4] = 0; /* 0 offset = async */
asynchronous (host, c->target);
}
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 phasen", host->host_no);
return SPECIFIC_INT_ABORT;
case A_int_err_selected:
if ((hostdata->chip / 100) == 8)
printk ("scsi%d : selected by target %dn", host->host_no,
(int) NCR53c7x0_read8(SDID_REG_800) &7);
else
printk ("scsi%d : selected by target LCRC=0x%02xn", 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 %dn",
host->host_no, (int) NCR53c7x0_read8(SDID_REG_800) & 7,
hostdata->reselected_identify & 7);
else
printk ("scsi%d : unexpected reselect LCRC=0x%02xn", 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 CONDITIONn", host->host_no);
if (!c) {
printk("scsi%d : CHECK CONDITION with no SCSI commandn",
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 completen", 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%xn",
host->host_no, NCR53c7x0_read8(SXFER_REG),
NCR53c7x0_read8(SCNTL3_REG_800));
else
printk ("scsi%d : sxfer=0x%x, cannot read SBCLn",
host->host_no, NCR53c7x0_read8(SXFER_REG));
if (c) {
print_insn (host, (u32 *)
hostdata->sync[c->target].script, "", 1);
print_insn (host, (u32 *)
hostdata->sync[c->target].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) scheduledn",
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 : idlen", 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 sentn");
}
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 %dn",
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 %dn",
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 disconnectingn",
host->host_no, c->target, c->lun);
else
printk("scsi%d : unknown target disconnectingn",
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 aren",
host->host_no);
print_queues(host);
#if 0
/* Not valid on ncr53c710! */
printk ("scsi%d : sxfer=0x%x, scntl3=0x%xn",
host->host_no, NCR53c7x0_read8(SXFER_REG),
NCR53c7x0_read8(SCNTL3_REG_800));
#endif
if (c) {
print_insn (host, (u32 *)
hostdata->sync[c->target].script, "", 1);
print_insn (host, (u32 *)
hostdata->sync[c->target].script + 2, "", 1);
}
}
return SPECIFIC_INT_RESTART;
#endif
#ifdef A_int_debug_panic
case A_int_debug_panic:
printk("scsi%d : int_debug_panic receivedn", 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 %dn",
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->target].sxfer_sanity ||
scntl3 != hostdata->sync[c->target].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%xn",
host->host_no, (int) sxfer, (int) scntl3);
} else {
if (c) {
if (sxfer != hostdata->sync[c->target].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->target].sscf_710);
}
} else
printk ("scsi%d : unknown command sxfer=0x%xn",
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%xn"
" datapath residual=%dn",
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%xn"
" datapath residual=%dn",
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->target) {
printk ("scsi%d : SDID target %d != DSA target %d at %sn",
host->host_no, sdid, c->target, 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%xn",
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->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%xn",
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);
save_flags(flags);
cli();
/* 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);
#ifdef CONFIG_MVME16x
if (MACH_IS_MVME16x)
{
volatile unsigned long v;
/* Enable scsi chip and s/w level 7 ints */
v = *(volatile unsigned long *)0xfff40080;
v = (v & ~(0xf << 28)) | (4 << 28);
*(volatile unsigned long *)0xfff40080 = v;
v = *(volatile unsigned long *)0xfff4006c;
v |= 0x8000;
*(volatile unsigned long *)0xfff4006c = v;
v = *(volatile unsigned long *)0xfff4202c;
v = (v & ~0xff) | 0x10 | 4;
*(volatile unsigned long *)0xfff4202c = v;
}
#endif
/* Anything needed for your hardware? */
restore_flags(flags);
}
/*
* Function static struct NCR53c7x0_cmd *allocate_cmd (Scsi_Cmnd *cmd)
*
* Purpose : Return the first free NCR53c7x0_cmd structure (which are
* reused in a LIFO manner to minimize cache thrashing).
*
* Side effects : If we haven't yet scheduled allocation of NCR53c7x0_cmd
* structures for this device, do so. Attempt to complete all scheduled
* allocations using get_free_page(), putting NCR53c7x0_cmd structures on
* the free list. Teach programmers not to drink and hack.
*
* Inputs : cmd - SCSI command
*
* Returns : NCR53c7x0_cmd structure allocated on behalf of cmd;
* NULL on failure.
*/
static void
my_free_page (void *addr, int dummy)
{
/* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, which
* XXX may be invalid (CONFIG_060_WRITETHROUGH)
*/
kernel_set_cachemode(addr, 4096, IOMAP_FULL_CACHING);
free_page ((u32)addr);
}
static struct NCR53c7x0_cmd *
allocate_cmd (Scsi_Cmnd *cmd) {
struct Scsi_Host *host = cmd->host;
struct NCR53c7x0_hostdata *hostdata =
(struct NCR53c7x0_hostdata *) host->hostdata[0];