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minix/drivers/at_wini/at_wini.c
David van Moolenbroek b4d909d415 Split block/character protocols and libdriver 
This patch separates the character and block driver communication
protocols. The old character protocol remains the same, but a new
block protocol is introduced. The libdriver library is replaced by
two new libraries: libchardriver and libblockdriver. Their exposed
API, and drivers that use them, have been updated accordingly.
Together, libbdev and libblockdriver now completely abstract away
the message format used by the block protocol. As the memory driver
is both a character and a block device driver, it now implements its
own message loop.

The most important semantic change made to the block protocol is that
it is no longer possible to return both partial results and an error
for a single transfer. This simplifies the interaction between the
caller and the driver, as the I/O vector no longer needs to be copied
back. Also, drivers are now no longer supposed to decide based on the
layout of the I/O vector when a transfer should be cut short. Put
simply, transfers are now supposed to either succeed completely, or
result in an error.

After this patch, the state of the various pieces is as follows:
- block protocol: stable
- libbdev API: stable for synchronous communication
- libblockdriver API: needs slight revision (the drvlib/partition API
  in particular; the threading API will also change shortly)
- character protocol: needs cleanup
- libchardriver API: needs cleanup accordingly
- driver restarts: largely unsupported until endpoint changes are
  reintroduced

As a side effect, this patch eliminates several bugs, hacks, and gcc
-Wall and -W warnings all over the place. It probably introduces a
few new ones, too.

Update warning: this patch changes the protocol between MFS and disk
drivers, so in order to use old/new images, the MFS from the ramdisk
must be used to mount all file systems.
2011-11-23 14:06:37 +01:00

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/* This file contains the device dependent part of a driver for the IBM-AT
* winchester controller. Written by Adri Koppes.
*
* The file contains one entry point:
*
* at_winchester_task: main entry when system is brought up
*
* Changes:
* Aug 19, 2005 ATA PCI support, supports SATA (Ben Gras)
* Nov 18, 2004 moved AT disk driver to user-space (Jorrit N. Herder)
* Aug 20, 2004 watchdogs replaced by sync alarms (Jorrit N. Herder)
* Mar 23, 2000 added ATAPI CDROM support (Michael Temari)
* May 14, 2000 d-d/i rewrite (Kees J. Bot)
* Apr 13, 1992 device dependent/independent split (Kees J. Bot)
*/
#include "at_wini.h"
#include <minix/sysutil.h>
#include <minix/type.h>
#include <minix/endpoint.h>
#include <sys/ioc_disk.h>
#include <machine/pci.h>
#include <sys/mman.h>
#include <sys/svrctl.h>
/* Variables. */
/* Common command block */
struct command {
u8_t precomp; /* REG_PRECOMP, etc. */
u8_t count;
u8_t sector;
u8_t cyl_lo;
u8_t cyl_hi;
u8_t ldh;
u8_t command;
/* The following at for LBA48 */
u8_t count_prev;
u8_t sector_prev;
u8_t cyl_lo_prev;
u8_t cyl_hi_prev;
};
/* Timeouts and max retries. */
PRIVATE int timeout_usecs = DEF_TIMEOUT_USECS;
PRIVATE int max_errors = MAX_ERRORS;
PRIVATE long w_standard_timeouts = 0;
PRIVATE long w_pci_debug = 0;
PRIVATE long w_instance = 0;
PRIVATE long disable_dma = 0;
PRIVATE long atapi_debug = 0;
PRIVATE long w_identify_wakeup_ticks;
PRIVATE long wakeup_ticks;
PRIVATE long w_atapi_dma;
PRIVATE int w_testing = 0;
PRIVATE int w_silent = 0;
PRIVATE int w_next_drive = 0;
PRIVATE u32_t system_hz;
/* The struct wini is indexed by controller first, then drive (0-3).
* Controller 0 is always the 'compatability' ide controller, at
* the fixed locations, whether present or not.
*/
PRIVATE struct wini { /* main drive struct, one entry per drive */
unsigned state; /* drive state: deaf, initialized, dead */
unsigned short w_status; /* device status register */
unsigned base_cmd; /* command base register */
unsigned base_ctl; /* control base register */
unsigned base_dma; /* dma base register */
int dma_intseen;
unsigned irq; /* interrupt request line */
unsigned irq_need_ack; /* irq needs to be acknowledged */
int irq_hook_id; /* id of irq hook at the kernel */
int lba48; /* supports lba48 */
int dma; /* supports dma */
unsigned lcylinders; /* logical number of cylinders (BIOS) */
unsigned lheads; /* logical number of heads */
unsigned lsectors; /* logical number of sectors per track */
unsigned pcylinders; /* physical number of cylinders (translated) */
unsigned pheads; /* physical number of heads */
unsigned psectors; /* physical number of sectors per track */
unsigned ldhpref; /* top four bytes of the LDH (head) register */
unsigned precomp; /* write precompensation cylinder / 4 */
unsigned max_count; /* max request for this drive */
unsigned open_ct; /* in-use count */
struct device part[DEV_PER_DRIVE]; /* disks and partitions */
struct device subpart[SUB_PER_DRIVE]; /* subpartitions */
} wini[MAX_DRIVES], *w_wn;
PRIVATE int w_device = -1;
PUBLIC int w_command; /* current command in execution */
PRIVATE int w_drive; /* selected drive */
PRIVATE struct device *w_dv; /* device's base and size */
PRIVATE u8_t *tmp_buf;
#define ATA_DMA_SECTORS 64
#define ATA_DMA_BUF_SIZE (ATA_DMA_SECTORS*SECTOR_SIZE)
PRIVATE char *dma_buf;
PRIVATE phys_bytes dma_buf_phys;
#define N_PRDTE 1024 /* Should be enough for large requests */
struct prdte
{
phys_bytes prdte_base;
u16_t prdte_count;
u8_t prdte_reserved;
u8_t prdte_flags;
};
#define PRDT_BYTES (sizeof(struct prdte) * N_PRDTE)
PRIVATE struct prdte *prdt;
PRIVATE phys_bytes prdt_phys;
#define PRDTE_FL_EOT 0x80 /* End of table */
/* IDE devices we trust are IDE devices. */
PRIVATE struct quirk
{
int pci_class, pci_subclass, pci_interface;
u16_t vendor;
u16_t device;
} quirk_table[]=
{
{ 0x01, 0x04, 0x00, 0x1106, 0x3149 }, /* VIA VT6420 */
{ 0x01, 0x04, 0x00, 0x1095, 0x3512 },
{ 0x01, 0x80, -1, 0x1095, 0x3114 }, /* Silicon Image SATA */
{ 0, 0, 0, 0, 0 } /* end of list */
};
FORWARD _PROTOTYPE( void init_params, (void) );
FORWARD _PROTOTYPE( void init_drive, (struct wini *w, int base_cmd,
int base_ctl, int base_dma, int irq, int ack, int hook,
int drive) );
FORWARD _PROTOTYPE( void init_params_pci, (int) );
FORWARD _PROTOTYPE( int w_do_open, (dev_t minor, int access) );
FORWARD _PROTOTYPE( struct device *w_prepare, (dev_t dev) );
FORWARD _PROTOTYPE( struct device *w_part, (dev_t minor) );
FORWARD _PROTOTYPE( int w_identify, (void) );
FORWARD _PROTOTYPE( char *w_name, (void) );
FORWARD _PROTOTYPE( int w_specify, (void) );
FORWARD _PROTOTYPE( int w_io_test, (void) );
FORWARD _PROTOTYPE( ssize_t w_transfer, (dev_t minor, int do_write,
u64_t position, endpoint_t proc_nr, iovec_t *iov,
unsigned int nr_req, int flags) );
FORWARD _PROTOTYPE( int com_out, (struct command *cmd) );
FORWARD _PROTOTYPE( int com_out_ext, (struct command *cmd) );
FORWARD _PROTOTYPE( int setup_dma, (unsigned *sizep, endpoint_t proc_nr,
iovec_t *iov, size_t addr_offset, int do_write) );
FORWARD _PROTOTYPE( void w_need_reset, (void) );
FORWARD _PROTOTYPE( void ack_irqs, (unsigned int) );
FORWARD _PROTOTYPE( int w_do_close, (dev_t minor) );
FORWARD _PROTOTYPE( int w_ioctl, (dev_t minor, unsigned int request,
endpoint_t endpt, cp_grant_id_t grant) );
FORWARD _PROTOTYPE( void w_hw_int, (unsigned int irqs) );
FORWARD _PROTOTYPE( int com_simple, (struct command *cmd) );
FORWARD _PROTOTYPE( void w_timeout, (void) );
FORWARD _PROTOTYPE( int w_reset, (void) );
FORWARD _PROTOTYPE( void w_intr_wait, (void) );
FORWARD _PROTOTYPE( int at_intr_wait, (void) );
FORWARD _PROTOTYPE( int w_waitfor, (int mask, int value) );
FORWARD _PROTOTYPE( int w_waitfor_dma, (int mask, int value) );
FORWARD _PROTOTYPE( void w_geometry, (dev_t minor,
struct partition *entry) );
#if ENABLE_ATAPI
FORWARD _PROTOTYPE( int atapi_sendpacket, (u8_t *packet, unsigned cnt,
int do_dma) );
FORWARD _PROTOTYPE( int atapi_intr_wait, (int dma, size_t max) );
FORWARD _PROTOTYPE( int atapi_open, (void) );
FORWARD _PROTOTYPE( void atapi_close, (void) );
FORWARD _PROTOTYPE( int atapi_transfer, (int do_write, u64_t position,
endpoint_t endpt, iovec_t *iov, unsigned int nr_req) );
#endif
#define sys_voutb(out, n) at_voutb((out), (n))
FORWARD _PROTOTYPE( int at_voutb, (pvb_pair_t *, int n));
#define sys_vinb(in, n) at_vinb((in), (n))
FORWARD _PROTOTYPE( int at_vinb, (pvb_pair_t *, int n));
#undef sys_outb
#undef sys_inb
#undef sys_outl
FORWARD _PROTOTYPE( int at_out, (int line, u32_t port, unsigned long value,
char *typename, int type));
FORWARD _PROTOTYPE( int at_in, (int line, u32_t port, unsigned long *value,
char *typename, int type));
#define sys_outb(p, v) at_out(__LINE__, (p), (v), "outb", _DIO_BYTE)
#define sys_inb(p, v) at_in(__LINE__, (p), (v), "inb", _DIO_BYTE)
#define sys_outl(p, v) at_out(__LINE__, (p), (v), "outl", _DIO_LONG)
/* Entry points to this driver. */
PRIVATE struct blockdriver w_dtab = {
w_do_open, /* open or mount request, initialize device */
w_do_close, /* release device */
w_transfer, /* do the I/O */
w_ioctl, /* I/O control requests */
NULL, /* nothing to clean up */
w_part, /* return partition information */
w_geometry, /* tell the geometry of the disk */
w_hw_int, /* leftover hardware interrupts */
NULL, /* ignore leftover alarms */
NULL, /* ignore unrecognized messages */
NULL /* no multithreading support */
};
/* SEF functions and variables. */
FORWARD _PROTOTYPE( void sef_local_startup, (void) );
FORWARD _PROTOTYPE( int sef_cb_init_fresh, (int type, sef_init_info_t *info) );
EXTERN _PROTOTYPE( int sef_cb_lu_prepare, (int state) );
EXTERN _PROTOTYPE( int sef_cb_lu_state_isvalid, (int state) );
EXTERN _PROTOTYPE( void sef_cb_lu_state_dump, (int state) );
/*===========================================================================*
* at_winchester_task *
*===========================================================================*/
PUBLIC int main(int argc, char *argv[])
{
/* SEF local startup. */
env_setargs(argc, argv);
sef_local_startup();
/* Call the generic receive loop. */
blockdriver_task(&w_dtab);
return(OK);
}
/*===========================================================================*
* sef_local_startup *
*===========================================================================*/
PRIVATE void sef_local_startup(void)
{
/* Register init callbacks. */
sef_setcb_init_fresh(sef_cb_init_fresh);
sef_setcb_init_lu(sef_cb_init_fresh);
sef_setcb_init_restart(sef_cb_init_fresh);
/* Register live update callbacks. */
sef_setcb_lu_prepare(sef_cb_lu_prepare);
sef_setcb_lu_state_isvalid(sef_cb_lu_state_isvalid);
sef_setcb_lu_state_dump(sef_cb_lu_state_dump);
/* Let SEF perform startup. */
sef_startup();
}
/*===========================================================================*
* sef_cb_init_fresh *
*===========================================================================*/
PRIVATE int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *UNUSED(info))
{
/* Initialize the at_wini driver. */
system_hz = sys_hz();
if (!(tmp_buf = alloc_contig(2*DMA_BUF_SIZE, AC_ALIGN4K, NULL)))
panic("unable to allocate temporary buffer");
w_identify_wakeup_ticks = WAKEUP_TICKS;
wakeup_ticks = WAKEUP_TICKS;
/* Set special disk parameters. */
init_params();
/* Announce we are up! */
blockdriver_announce();
return(OK);
}
/*===========================================================================*
* init_params *
*===========================================================================*/
PRIVATE void init_params(void)
{
/* This routine is called at startup to initialize the drive parameters. */
u16_t parv[2];
unsigned int vector, size;
int drive, nr_drives;
struct wini *wn;
u8_t params[16];
int s;
long wakeup_secs = WAKEUP_SECS;
/* Boot variables. */
env_parse("instance", "d", 0, &w_instance, 0, 8);
env_parse("ata_std_timeout", "d", 0, &w_standard_timeouts, 0, 1);
env_parse("ata_pci_debug", "d", 0, &w_pci_debug, 0, 1);
env_parse(NO_DMA_VAR, "d", 0, &disable_dma, 0, 1);
env_parse("ata_id_timeout", "d", 0, &wakeup_secs, 1, 60);
env_parse("atapi_debug", "d", 0, &atapi_debug, 0, 1);
env_parse("atapi_dma", "d", 0, &w_atapi_dma, 0, 1);
w_identify_wakeup_ticks = wakeup_secs * system_hz;
if(atapi_debug)
panic("atapi_debug");
if(w_identify_wakeup_ticks <= 0) {
printf("changing wakeup from %ld to %d ticks.\n",
w_identify_wakeup_ticks, WAKEUP_TICKS);
w_identify_wakeup_ticks = WAKEUP_TICKS;
}
if (disable_dma) {
printf("at_wini%ld: DMA for ATA devices is disabled.\n", w_instance);
} else {
/* Ask for anonymous memory for DMA, that is physically contiguous. */
dma_buf = alloc_contig(ATA_DMA_BUF_SIZE, 0, &dma_buf_phys);
prdt = alloc_contig(PRDT_BYTES, 0, &prdt_phys);
if(!dma_buf || !prdt) {
disable_dma = 1;
printf("at_wini%ld: no dma\n", w_instance);
}
}
if (w_instance == 0) {
/* Get the number of drives from the BIOS data area */
s=sys_readbios(NR_HD_DRIVES_ADDR, params, NR_HD_DRIVES_SIZE);
if (s != OK)
panic("Couldn't read BIOS: %d", s);
if ((nr_drives = params[0]) > 2) nr_drives = 2;
for (drive = 0, wn = wini; drive < COMPAT_DRIVES; drive++, wn++) {
if (drive < nr_drives) {
/* Copy the BIOS parameter vector */
vector = (drive == 0) ? BIOS_HD0_PARAMS_ADDR :
BIOS_HD1_PARAMS_ADDR;
size = (drive == 0) ? BIOS_HD0_PARAMS_SIZE :
BIOS_HD1_PARAMS_SIZE;
s=sys_readbios(vector, parv, size);
if (s != OK)
panic("Couldn't read BIOS: %d", s);
/* Calculate the address of the parameters and copy them */
s=sys_readbios(hclick_to_physb(parv[1]) + parv[0],
params, 16L);
if (s != OK)
panic("Couldn't copy parameters: %d", s);
/* Copy the parameters to the structures of the drive */
wn->lcylinders = bp_cylinders(params);
wn->lheads = bp_heads(params);
wn->lsectors = bp_sectors(params);
wn->precomp = bp_precomp(params) >> 2;
}
/* Fill in non-BIOS parameters. */
init_drive(wn,
drive < 2 ? REG_CMD_BASE0 : REG_CMD_BASE1,
drive < 2 ? REG_CTL_BASE0 : REG_CTL_BASE1,
0 /* no DMA */, NO_IRQ, 0, 0, drive);
w_next_drive++;
}
}
/* Look for controllers on the pci bus. Skip none the first instance,
* skip one and then 2 for every instance, for every next instance.
*/
if (w_instance == 0)
init_params_pci(0);
else
init_params_pci(w_instance*2-1);
}
#define ATA_IF_NOTCOMPAT1 (1L << 0)
#define ATA_IF_NOTCOMPAT2 (1L << 2)
/*===========================================================================*
* init_drive *
*===========================================================================*/
PRIVATE void init_drive(struct wini *w, int base_cmd, int base_ctl,
int base_dma, int irq, int ack, int hook, int drive)
{
w->state = 0;
w->w_status = 0;
w->base_cmd = base_cmd;
w->base_ctl = base_ctl;
w->base_dma = base_dma;
if(w_pci_debug)
printf("at_wini%ld: drive %d: base_cmd 0x%x, base_ctl 0x%x, base_dma 0x%x\n",
w_instance, w-wini, w->base_cmd, w->base_ctl, w->base_dma);
w->irq = irq;
w->irq_need_ack = ack;
w->irq_hook_id = hook;
w->ldhpref = ldh_init(drive);
w->max_count = MAX_SECS << SECTOR_SHIFT;
w->lba48 = 0;
w->dma = 0;
}
PRIVATE int quirkmatch(struct quirk *table, u8_t bcr, u8_t scr, u8_t interface, u16_t vid, u16_t did) {
while(table->vendor) {
if(table->vendor == vid && table->device == did &&
table->pci_class == bcr &&
table->pci_subclass == scr &&
(table->pci_interface == -1 ||
table->pci_interface == interface)) {
return 1;
}
table++;
}
return 0;
}
/*===========================================================================*
* init_params_pci *
*===========================================================================*/
PRIVATE void init_params_pci(int skip)
{
int i, r, devind, drive, pci_compat = 0;
int irq, irq_hook;
u8_t bcr, scr, interface;
u16_t vid, did;
u32_t base_dma, t3;
pci_init();
for(drive = w_next_drive; drive < MAX_DRIVES; drive++)
wini[drive].state = IGNORING;
for(r = pci_first_dev(&devind, &vid, &did); r != 0;
r = pci_next_dev(&devind, &vid, &did)) {
int quirk = 0;
/* Except class 01h (mass storage), subclass be 01h (ATA).
* Also check listed RAID controllers.
*/
bcr= pci_attr_r8(devind, PCI_BCR);
scr= pci_attr_r8(devind, PCI_SCR);
interface= pci_attr_r8(devind, PCI_PIFR);
t3= ((bcr << 16) | (scr << 8) | interface);
if (bcr == PCI_BCR_MASS_STORAGE && scr == PCI_MS_IDE)
; /* Okay */
else if(quirkmatch(quirk_table, bcr, scr, interface, vid, did)) {
quirk = 1;
} else
continue; /* Unsupported device class */
/* Found a controller.
* Programming interface register tells us more.
*/
irq = pci_attr_r8(devind, PCI_ILR);
/* Any non-compat drives? */
if (quirk || (interface & (ATA_IF_NOTCOMPAT1 | ATA_IF_NOTCOMPAT2))) {
if (w_next_drive >= MAX_DRIVES)
{
/* We can't accept more drives, but have to search for
* controllers operating in compatibility mode.
*/
continue;
}
irq_hook = irq;
if (skip > 0) {
if (w_pci_debug)
{
printf(
"atapci skipping controller (remain %d)\n",
skip);
}
skip--;
continue;
}
if(pci_reserve_ok(devind) != OK) {
printf("at_wini%ld: pci_reserve %d failed - "
"ignoring controller!\n",
w_instance, devind);
continue;
}
if (sys_irqsetpolicy(irq, 0, &irq_hook) != OK) {
printf("atapci: couldn't set IRQ policy %d\n", irq);
continue;
}
if (sys_irqenable(&irq_hook) != OK) {
printf("atapci: couldn't enable IRQ line %d\n", irq);
continue;
}
}
base_dma = pci_attr_r32(devind, PCI_BAR_5) & 0xfffffffc;
/* Primary channel not in compatability mode? */
if (quirk || (interface & ATA_IF_NOTCOMPAT1)) {
u32_t base_cmd, base_ctl;
base_cmd = pci_attr_r32(devind, PCI_BAR) & 0xfffffffc;
base_ctl = pci_attr_r32(devind, PCI_BAR_2) & 0xfffffffc;
if (base_cmd != REG_CMD_BASE0 && base_cmd != REG_CMD_BASE1) {
init_drive(&wini[w_next_drive],
base_cmd, base_ctl+PCI_CTL_OFF,
base_dma, irq, 1, irq_hook, 0);
init_drive(&wini[w_next_drive+1],
base_cmd, base_ctl+PCI_CTL_OFF,
base_dma, irq, 1, irq_hook, 1);
if (w_pci_debug)
printf("at_wini%ld: atapci %d: 0x%x 0x%x irq %d\n",
w_instance, devind, base_cmd, base_ctl, irq);
w_next_drive += 2;
} else printf("at_wini%ld: atapci: ignored drives on primary channel, base %x\n", w_instance, base_cmd);
}
else
{
/* Update base_dma for compatibility device */
for (i= 0; i<MAX_DRIVES; i++)
{
if (wini[i].base_cmd == REG_CMD_BASE0) {
wini[i].base_dma= base_dma;
if(w_pci_debug)
printf("at_wini%ld: drive %d: base_dma 0x%x\n",
w_instance, i, wini[i].base_dma);
pci_compat = 1;
}
}
}
/* Secondary channel not in compatability mode? */
if (quirk || (interface & ATA_IF_NOTCOMPAT2)) {
u32_t base_cmd, base_ctl;
base_cmd = pci_attr_r32(devind, PCI_BAR_3) & 0xfffffffc;
base_ctl = pci_attr_r32(devind, PCI_BAR_4) & 0xfffffffc;
if (base_dma != 0)
base_dma += PCI_DMA_2ND_OFF;
if (base_cmd != REG_CMD_BASE0 && base_cmd != REG_CMD_BASE1) {
init_drive(&wini[w_next_drive],
base_cmd, base_ctl+PCI_CTL_OFF, base_dma,
irq, 1, irq_hook, 2);
init_drive(&wini[w_next_drive+1],
base_cmd, base_ctl+PCI_CTL_OFF, base_dma,
irq, 1, irq_hook, 3);
if (w_pci_debug)
printf("at_wini%ld: atapci %d: 0x%x 0x%x irq %d\n",
w_instance, devind, base_cmd, base_ctl, irq);
w_next_drive += 2;
} else printf("at_wini%ld: atapci: ignored drives on "
"secondary channel, base %x\n", w_instance, base_cmd);
}
else
{
/* Update base_dma for compatibility device */
for (i= 0; i<MAX_DRIVES; i++)
{
if (wini[i].base_cmd == REG_CMD_BASE1 && base_dma != 0) {
wini[i].base_dma= base_dma+PCI_DMA_2ND_OFF;
if (w_pci_debug)
printf("at_wini%ld: drive %d: base_dma 0x%x\n",
w_instance, i, wini[i].base_dma);
pci_compat = 1;
}
}
}
if(pci_compat) {
if(pci_reserve_ok(devind) != OK) {
printf("at_wini%ld (compat): pci_reserve %d failed!\n",
w_instance, devind);
}
}
}
}
/*===========================================================================*
* w_do_open *
*===========================================================================*/
PRIVATE int w_do_open(dev_t minor, int access)
{
/* Device open: Initialize the controller and read the partition table. */
struct wini *wn;
if (w_prepare(minor) == NULL) return(ENXIO);
wn = w_wn;
/* If we've probed it before and it failed, don't probe it again. */
if (wn->state & IGNORING) return ENXIO;
/* If we haven't identified it yet, or it's gone deaf,
* (re-)identify it.
*/
if (!(wn->state & IDENTIFIED) || (wn->state & DEAF)) {
/* Try to identify the device. */
if (w_identify() != OK) {
#if VERBOSE
printf("%s: probe failed\n", w_name());
#endif
if (wn->state & DEAF){
int err = w_reset();
if( err != OK ){
return err;
}
}
wn->state = IGNORING;
return(ENXIO);
}
/* Do a test transaction unless it's a CD drive (then
* we can believe the controller, and a test may fail
* due to no CD being in the drive). If it fails, ignore
* the device forever.
*/
if (!(wn->state & ATAPI) && w_io_test() != OK) {
wn->state |= IGNORING;
return(ENXIO);
}
}
#if ENABLE_ATAPI
if ((wn->state & ATAPI) && (access & W_BIT))
return(EACCES);
#endif
/* Partition the drive if it's being opened for the first time,
* or being opened after being closed.
*/
if (wn->open_ct == 0) {
#if ENABLE_ATAPI
if (wn->state & ATAPI) {
int r;
if ((r = atapi_open()) != OK) return(r);
}
#endif
/* Partition the disk. */
partition(&w_dtab, w_drive * DEV_PER_DRIVE, P_PRIMARY,
wn->state & ATAPI);
}
wn->open_ct++;
return(OK);
}
/*===========================================================================*
* w_prepare *
*===========================================================================*/
PRIVATE struct device *w_prepare(dev_t device)
{
/* Prepare for I/O on a device. */
w_device = (int) device;
if (device < NR_MINORS) { /* d0, d0p[0-3], d1, ... */
w_drive = device / DEV_PER_DRIVE; /* save drive number */
w_wn = &wini[w_drive];
w_dv = &w_wn->part[device % DEV_PER_DRIVE];
} else
if ((unsigned) (device -= MINOR_d0p0s0) < NR_SUBDEVS) {/*d[0-7]p[0-3]s[0-3]*/
w_drive = device / SUB_PER_DRIVE;
w_wn = &wini[w_drive];
w_dv = &w_wn->subpart[device % SUB_PER_DRIVE];
} else {
w_device = -1;
return(NULL);
}
return(w_dv);
}
/*===========================================================================*
* w_part *
*===========================================================================*/
PRIVATE struct device *w_part(dev_t device)
{
/* Return a pointer to the partition information of the given minor device. */
return w_prepare(device);
}
#define id_byte(n) (&tmp_buf[2 * (n)])
#define id_word(n) (((u16_t) id_byte(n)[0] << 0) \
|((u16_t) id_byte(n)[1] << 8))
#define id_longword(n) (((u32_t) id_byte(n)[0] << 0) \
|((u32_t) id_byte(n)[1] << 8) \
|((u32_t) id_byte(n)[2] << 16) \
|((u32_t) id_byte(n)[3] << 24))
/*===========================================================================*
* check_dma *
*===========================================================================*/
PRIVATE void
check_dma(struct wini *wn)
{
unsigned long dma_status = 0;
u32_t dma_base;
int id_dma, ultra_dma;
u16_t w;
wn->dma= 0;
if (disable_dma)
return;
w= id_word(ID_CAPABILITIES);
id_dma= !!(w & ID_CAP_DMA);
w= id_byte(ID_FIELD_VALIDITY)[0];
ultra_dma= !!(w & ID_FV_88);
dma_base= wn->base_dma;
if (dma_base) {
if (sys_inb(dma_base + DMA_STATUS, &dma_status) != OK) {
panic("unable to read DMA status register");
}
}
if (id_dma && dma_base) {
w= id_word(ID_MULTIWORD_DMA);
if (w_pci_debug &&
(w & (ID_MWDMA_2_SUP|ID_MWDMA_1_SUP|ID_MWDMA_0_SUP))) {
printf(
"%s: multiword DMA modes supported:%s%s%s\n",
w_name(),
(w & ID_MWDMA_0_SUP) ? " 0" : "",
(w & ID_MWDMA_1_SUP) ? " 1" : "",
(w & ID_MWDMA_2_SUP) ? " 2" : "");
}
if (w_pci_debug &&
(w & (ID_MWDMA_0_SEL|ID_MWDMA_1_SEL|ID_MWDMA_2_SEL))) {
printf(
"%s: multiword DMA mode selected:%s%s%s\n",
w_name(),
(w & ID_MWDMA_0_SEL) ? " 0" : "",
(w & ID_MWDMA_1_SEL) ? " 1" : "",
(w & ID_MWDMA_2_SEL) ? " 2" : "");
}
if (w_pci_debug && ultra_dma) {
w= id_word(ID_ULTRA_DMA);
if (w & (ID_UDMA_0_SUP|ID_UDMA_1_SUP|
ID_UDMA_2_SUP|ID_UDMA_3_SUP|
ID_UDMA_4_SUP|ID_UDMA_5_SUP)) {
printf(
"%s: Ultra DMA modes supported:%s%s%s%s%s%s\n",
w_name(),
(w & ID_UDMA_0_SUP) ? " 0" : "",
(w & ID_UDMA_1_SUP) ? " 1" : "",
(w & ID_UDMA_2_SUP) ? " 2" : "",
(w & ID_UDMA_3_SUP) ? " 3" : "",
(w & ID_UDMA_4_SUP) ? " 4" : "",
(w & ID_UDMA_5_SUP) ? " 5" : "");
}
if (w & (ID_UDMA_0_SEL|ID_UDMA_1_SEL|
ID_UDMA_2_SEL|ID_UDMA_3_SEL|
ID_UDMA_4_SEL|ID_UDMA_5_SEL)) {
printf(
"%s: Ultra DMA mode selected:%s%s%s%s%s%s\n",
w_name(),
(w & ID_UDMA_0_SEL) ? " 0" : "",
(w & ID_UDMA_1_SEL) ? " 1" : "",
(w & ID_UDMA_2_SEL) ? " 2" : "",
(w & ID_UDMA_3_SEL) ? " 3" : "",
(w & ID_UDMA_4_SEL) ? " 4" : "",
(w & ID_UDMA_5_SEL) ? " 5" : "");
}
}
wn->dma= 1;
} else if (id_dma || dma_base) {
printf("id_dma %d, dma_base 0x%x\n", id_dma, dma_base);
} else
printf("no DMA support\n");
}
/*===========================================================================*
* w_identify *
*===========================================================================*/
PRIVATE int w_identify(void)
{
/* Find out if a device exists, if it is an old AT disk, or a newer ATA
* drive, a removable media device, etc.
*/
struct wini *wn = w_wn;
struct command cmd;
int s;
u16_t w;
unsigned long size;
int prev_wakeup;
int r;
/* Try to identify the device. */
cmd.ldh = wn->ldhpref;
cmd.command = ATA_IDENTIFY;
/* In testing mode, a drive will get ignored at the first timeout. */
w_testing = 1;
/* Execute *_IDENTIFY with configured *_IDENTIFY timeout. */
prev_wakeup = wakeup_ticks;
wakeup_ticks = w_identify_wakeup_ticks;
r = com_simple(&cmd);
if (r == OK && w_waitfor(STATUS_DRQ, STATUS_DRQ) &&
!(wn->w_status & (STATUS_ERR|STATUS_WF))) {
/* Device information. */
if ((s=sys_insw(wn->base_cmd + REG_DATA, SELF, tmp_buf, SECTOR_SIZE)) != OK)
panic("Call to sys_insw() failed: %d", s);
#if 0
if (id_word(0) & ID_GEN_NOT_ATA)
{
printf("%s: not an ATA device?\n", w_name());
wakeup_ticks = prev_wakeup;
w_testing = 0;
return ERR;
}
#endif
/* This is an ATA device. */
wn->state |= SMART;
/* Preferred CHS translation mode. */
wn->pcylinders = id_word(1);
wn->pheads = id_word(3);
wn->psectors = id_word(6);
size = (u32_t) wn->pcylinders * wn->pheads * wn->psectors;
w= id_word(ID_CAPABILITIES);
if ((w & ID_CAP_LBA) && size > 512L*1024*2) {
/* Drive is LBA capable and is big enough to trust it to
* not make a mess of it.
*/
wn->ldhpref |= LDH_LBA;
size = id_longword(60);
w= id_word(ID_CSS);
if (size < LBA48_CHECK_SIZE)
{
/* No need to check for LBA48 */
}
else if (w & ID_CSS_LBA48) {
/* Drive is LBA48 capable (and LBA48 is turned on). */
if (id_longword(102)) {
/* If no. of sectors doesn't fit in 32 bits,
* trunacte to this. So it's LBA32 for now.
* This can still address devices up to 2TB
* though.
*/
size = ULONG_MAX;
} else {
/* Actual number of sectors fits in 32 bits. */
size = id_longword(100);
}
wn->lba48 = 1;
}
check_dma(wn);
}
if (wn->lcylinders == 0 || wn->lheads == 0 || wn->lsectors == 0) {
/* No BIOS parameters? Then make some up. */
wn->lcylinders = wn->pcylinders;
wn->lheads = wn->pheads;
wn->lsectors = wn->psectors;
while (wn->lcylinders > 1024) {
wn->lheads *= 2;
wn->lcylinders /= 2;
}
}
#if ENABLE_ATAPI
} else
if (cmd.command = ATAPI_IDENTIFY,
com_simple(&cmd) == OK && w_waitfor(STATUS_DRQ, STATUS_DRQ) &&
!(wn->w_status & (STATUS_ERR|STATUS_WF))) {
/* An ATAPI device. */
wn->state |= ATAPI;
/* Device information. */
if ((s=sys_insw(wn->base_cmd + REG_DATA, SELF, tmp_buf, 512)) != OK)
panic("Call to sys_insw() failed: %d", s);
size = 0; /* Size set later. */
check_dma(wn);
#endif
} else {
/* Not an ATA device; no translations, no special features. Don't
* touch it unless the BIOS knows about it.
*/
if (wn->lcylinders == 0) {
wakeup_ticks = prev_wakeup;
w_testing = 0;
return(ERR);
} /* no BIOS parameters */
wn->pcylinders = wn->lcylinders;
wn->pheads = wn->lheads;
wn->psectors = wn->lsectors;
size = (u32_t) wn->pcylinders * wn->pheads * wn->psectors;
}
/* Restore wakeup_ticks and unset testing mode. */
wakeup_ticks = prev_wakeup;
w_testing = 0;
/* Size of the whole drive */
wn->part[0].dv_size = mul64u(size, SECTOR_SIZE);
/* Reset/calibrate (where necessary) */
if (w_specify() != OK && w_specify() != OK) {
return(ERR);
}
if (wn->irq == NO_IRQ) {
/* Everything looks OK; register IRQ so we can stop polling. */
wn->irq = w_drive < 2 ? AT_WINI_0_IRQ : AT_WINI_1_IRQ;
wn->irq_hook_id = wn->irq; /* id to be returned if interrupt occurs */
if ((s=sys_irqsetpolicy(wn->irq, IRQ_REENABLE, &wn->irq_hook_id)) != OK)
panic("couldn't set IRQ policy: %d", s);
if ((s=sys_irqenable(&wn->irq_hook_id)) != OK)
panic("couldn't enable IRQ line: %d", s);
}
wn->state |= IDENTIFIED;
return(OK);
}
/*===========================================================================*
* w_name *
*===========================================================================*/
PRIVATE char *w_name(void)
{
/* Return a name for the current device. */
static char name[] = "AT0-D0";
name[2] = '0' + w_instance;
name[5] = '0' + w_drive;
return name;
}
/*===========================================================================*
* w_io_test *
*===========================================================================*/
PRIVATE int w_io_test(void)
{
int save_dev;
int save_timeout, save_errors, save_wakeup;
iovec_t iov;
static char *buf;
ssize_t r;
#ifdef CD_SECTOR_SIZE
#define BUFSIZE CD_SECTOR_SIZE
#else
#define BUFSIZE SECTOR_SIZE
#endif
STATICINIT(buf, BUFSIZE);
iov.iov_addr = (vir_bytes) buf;
iov.iov_size = BUFSIZE;
save_dev = w_device;
/* Reduce timeout values for this test transaction. */
save_timeout = timeout_usecs;
save_errors = max_errors;
save_wakeup = wakeup_ticks;
if (!w_standard_timeouts) {
timeout_usecs = 4000000;
wakeup_ticks = system_hz * 6;
max_errors = 3;
}
w_testing = 1;
/* Try I/O on the actual drive (not any (sub)partition). */
r = w_transfer(w_drive * DEV_PER_DRIVE, FALSE /*do_write*/, cvu64(0),
SELF, &iov, 1, BDEV_NOFLAGS);
/* Switch back. */
if (w_prepare(save_dev) == NULL)
panic("Couldn't switch back devices");
/* Restore parameters. */
timeout_usecs = save_timeout;
max_errors = save_errors;
wakeup_ticks = save_wakeup;
w_testing = 0;
/* Test if everything worked. */
if (r != BUFSIZE) {
return ERR;
}
/* Everything worked. */
return OK;
}
/*===========================================================================*
* w_specify *
*===========================================================================*/
PRIVATE int w_specify(void)
{
/* Routine to initialize the drive after boot or when a reset is needed. */
struct wini *wn = w_wn;
struct command cmd;
if ((wn->state & DEAF) && w_reset() != OK) {
return(ERR);
}
if (!(wn->state & ATAPI)) {
/* Specify parameters: precompensation, number of heads and sectors. */
cmd.precomp = wn->precomp;
cmd.count = wn->psectors;
cmd.ldh = w_wn->ldhpref | (wn->pheads - 1);
cmd.command = CMD_SPECIFY; /* Specify some parameters */
/* Output command block and see if controller accepts the parameters. */
if (com_simple(&cmd) != OK) return(ERR);
if (!(wn->state & SMART)) {
/* Calibrate an old disk. */
cmd.sector = 0;
cmd.cyl_lo = 0;
cmd.cyl_hi = 0;
cmd.ldh = w_wn->ldhpref;
cmd.command = CMD_RECALIBRATE;
if (com_simple(&cmd) != OK) return(ERR);
}
}
wn->state |= INITIALIZED;
return(OK);
}
/*===========================================================================*
* do_transfer *
*===========================================================================*/
PRIVATE int do_transfer(const struct wini *wn, unsigned int precomp,
unsigned int count, unsigned int sector,
unsigned int do_write, int do_dma)
{
struct command cmd;
unsigned int sector_high;
unsigned secspcyl = wn->pheads * wn->psectors;
int do_lba48;
sector_high= 0; /* For future extensions */
do_lba48= 0;
if (sector >= LBA48_CHECK_SIZE || sector_high != 0)
{
if (wn->lba48)
do_lba48= 1;
else if (sector > LBA_MAX_SIZE || sector_high != 0)
{
/* Strange sector count for LBA device */
return EIO;
}
}
cmd.precomp = precomp;
cmd.count = count;
if (do_dma)
{
cmd.command = do_write ? CMD_WRITE_DMA : CMD_READ_DMA;
}
else
cmd.command = do_write ? CMD_WRITE : CMD_READ;
if (do_lba48) {
if (do_dma)
{
cmd.command = (do_write ?
CMD_WRITE_DMA_EXT : CMD_READ_DMA_EXT);
}
else
{
cmd.command = (do_write ?
CMD_WRITE_EXT : CMD_READ_EXT);
}
cmd.count_prev= (count >> 8);
cmd.sector = (sector >> 0) & 0xFF;
cmd.cyl_lo = (sector >> 8) & 0xFF;
cmd.cyl_hi = (sector >> 16) & 0xFF;
cmd.sector_prev= (sector >> 24) & 0xFF;
cmd.cyl_lo_prev= (sector_high) & 0xFF;
cmd.cyl_hi_prev= (sector_high >> 8) & 0xFF;
cmd.ldh = wn->ldhpref;
return com_out_ext(&cmd);
} else if (wn->ldhpref & LDH_LBA) {
cmd.sector = (sector >> 0) & 0xFF;
cmd.cyl_lo = (sector >> 8) & 0xFF;
cmd.cyl_hi = (sector >> 16) & 0xFF;
cmd.ldh = wn->ldhpref | ((sector >> 24) & 0xF);
} else {
int cylinder, head, sec;
cylinder = sector / secspcyl;
head = (sector % secspcyl) / wn->psectors;
sec = sector % wn->psectors;
cmd.sector = sec + 1;
cmd.cyl_lo = cylinder & BYTE;
cmd.cyl_hi = (cylinder >> 8) & BYTE;
cmd.ldh = wn->ldhpref | head;
}
return com_out(&cmd);
}
PRIVATE void stop_dma(const struct wini *wn)
{
int r;
/* Stop bus master operation */
r= sys_outb(wn->base_dma + DMA_COMMAND, 0);
if (r != 0) panic("stop_dma: sys_outb failed: %d", r);
}
PRIVATE void start_dma(const struct wini *wn, int do_write)
{
u32_t v;
int r;
/* Assume disk reads. Start DMA */
v= DMA_CMD_START;
if (!do_write)
{
/* Disk reads generate PCI write cycles. */
v |= DMA_CMD_WRITE;
}
r= sys_outb(wn->base_dma + DMA_COMMAND, v);
if (r != 0) panic("start_dma: sys_outb failed: %d", r);
}
PRIVATE int error_dma(const struct wini *wn)
{
int r;
unsigned long v;
#define DMAERR(msg) \
printf("at_wini%ld: bad DMA: %s. Disabling DMA for drive %d.\n", \
w_instance, msg, wn - wini); \
printf("at_wini%ld: workaround: set %s=1 in boot monitor.\n", \
w_instance, NO_DMA_VAR); \
return 1; \
r= sys_inb(wn->base_dma + DMA_STATUS, &v);
if (r != 0) panic("w_transfer: sys_inb failed: %d", r);
if (!wn->dma_intseen) {
/* DMA did not complete successfully */
if (v & DMA_ST_BM_ACTIVE) {
DMAERR("DMA did not complete");
} else if (v & DMA_ST_ERROR) {
DMAERR("DMA error");
} else {
DMAERR("DMA buffer too small");
}
} else if ((v & DMA_ST_BM_ACTIVE)) {
DMAERR("DMA buffer too large");
}
return 0;
}
/*===========================================================================*
* w_transfer *
*===========================================================================*/
PRIVATE ssize_t w_transfer(
dev_t minor, /* minor device to perform the transfer on */
int do_write, /* read or write? */
u64_t position, /* offset on device to read or write */
endpoint_t proc_nr, /* process doing the request */
iovec_t *iov, /* pointer to read or write request vector */
unsigned int nr_req, /* length of request vector */
int UNUSED(flags) /* transfer flags */
)
{
struct wini *wn;
iovec_t *iop, *iov_end = iov + nr_req;
int n, r, s, errors, do_dma;
unsigned long block, w_status;
u64_t dv_size;
unsigned nbytes;
unsigned dma_buf_offset;
ssize_t total = 0;
size_t addr_offset = 0;
if (w_prepare(minor) == NULL) return(ENXIO);
wn = w_wn;
dv_size = w_dv->dv_size;
#if ENABLE_ATAPI
if (w_wn->state & ATAPI) {
return atapi_transfer(do_write, position, proc_nr, iov, nr_req);
}
#endif
/* Check disk address. */
if (rem64u(position, SECTOR_SIZE) != 0) return(EINVAL);
errors = 0;
while (nr_req > 0) {
/* How many bytes to transfer? */
nbytes = 0;
for (iop = iov; iop < iov_end; iop++) nbytes += iop->iov_size;
if ((nbytes & SECTOR_MASK) != 0) return(EINVAL);
/* Which block on disk and how close to EOF? */
if (cmp64(position, dv_size) >= 0) return(total); /* At EOF */
if (cmp64(add64ul(position, nbytes), dv_size) > 0)
nbytes = diff64(dv_size, position);
block = div64u(add64(w_dv->dv_base, position), SECTOR_SIZE);
do_dma= wn->dma;
if (nbytes >= wn->max_count) {
/* The drive can't do more then max_count at once. */
nbytes = wn->max_count;
}
/* First check to see if a reinitialization is needed. */
if (!(wn->state & INITIALIZED) && w_specify() != OK) return(EIO);
if (do_dma) {
stop_dma(wn);
if (!setup_dma(&nbytes, proc_nr, iov, addr_offset, do_write)) {
do_dma = 0;
}
#if 0
printf("nbytes = %d\n", nbytes);
#endif
}
/* Tell the controller to transfer nbytes bytes. */
r = do_transfer(wn, wn->precomp, (nbytes >> SECTOR_SHIFT),
block, do_write, do_dma);
if (do_dma)
start_dma(wn, do_write);
if (do_write) {
/* The specs call for a 400 ns wait after issuing the command.
* Reading the alternate status register is the suggested
* way to implement this wait.
*/
if (sys_inb((wn->base_ctl+REG_CTL_ALTSTAT), &w_status) != OK)
panic("couldn't get status");
}
if (do_dma) {
/* Wait for the interrupt, check DMA status and optionally
* copy out.
*/
wn->dma_intseen = 0;
if ((r = at_intr_wait()) != OK)
{
/* Don't retry if sector marked bad or too many
* errors.
*/
if (r == ERR_BAD_SECTOR || ++errors == max_errors) {
w_command = CMD_IDLE;
return(EIO);
}
continue;
}
/* Wait for DMA_ST_INT to get set */
if(!wn->dma_intseen) {
if(w_waitfor_dma(DMA_ST_INT, DMA_ST_INT))
wn->dma_intseen = 1;
}
if(error_dma(wn)) {
wn->dma = 0;
continue;
}
stop_dma(wn);
dma_buf_offset= 0;
while (r == OK && nbytes > 0)
{
n= iov->iov_size;
if (n > nbytes)
n= nbytes;
/* Book the bytes successfully transferred. */
nbytes -= n;
position= add64ul(position, n);
total += n;
addr_offset += n;
if ((iov->iov_size -= n) == 0) {
iov++; nr_req--; addr_offset = 0;
}
dma_buf_offset += n;
}
}
while (r == OK && nbytes > 0) {
/* For each sector, wait for an interrupt and fetch the data
* (read), or supply data to the controller and wait for an
* interrupt (write).
*/
if (!do_write) {
/* First an interrupt, then data. */
if ((r = at_intr_wait()) != OK) {
/* An error, send data to the bit bucket. */
if (w_wn->w_status & STATUS_DRQ) {
if ((s=sys_insw(wn->base_cmd+REG_DATA,
SELF, tmp_buf,
SECTOR_SIZE)) != OK) {
panic("Call to sys_insw() failed: %d", s);
}
}
break;
}
}
/* Wait for busy to clear. */
if (!w_waitfor(STATUS_BSY, 0)) { r = ERR; break; }
/* Wait for data transfer requested. */
if (!w_waitfor(STATUS_DRQ, STATUS_DRQ)) { r = ERR; break; }
/* Copy bytes to or from the device's buffer. */
if (!do_write) {
if(proc_nr != SELF) {
s=sys_safe_insw(wn->base_cmd + REG_DATA, proc_nr,
(void *) (iov->iov_addr), addr_offset,
SECTOR_SIZE);
} else {
s=sys_insw(wn->base_cmd + REG_DATA, proc_nr,
(void *) (iov->iov_addr + addr_offset),
SECTOR_SIZE);
}
if(s != OK) {
panic("Call to sys_insw() failed: %d", s);
}
} else {
if(proc_nr != SELF) {
s=sys_safe_outsw(wn->base_cmd + REG_DATA, proc_nr,
(void *) (iov->iov_addr), addr_offset,
SECTOR_SIZE);
} else {
s=sys_outsw(wn->base_cmd + REG_DATA, proc_nr,
(void *) (iov->iov_addr + addr_offset),
SECTOR_SIZE);
}
if(s != OK) {
panic("Call to sys_outsw() failed: %d", s);
}
/* Data sent, wait for an interrupt. */
if ((r = at_intr_wait()) != OK) break;
}
/* Book the bytes successfully transferred. */
nbytes -= SECTOR_SIZE;
position= add64u(position, SECTOR_SIZE);
addr_offset += SECTOR_SIZE;
total += SECTOR_SIZE;
if ((iov->iov_size -= SECTOR_SIZE) == 0) {
iov++;
nr_req--;
addr_offset = 0;
}
}
/* Any errors? */
if (r != OK) {
/* Don't retry if sector marked bad or too many errors. */
if (r == ERR_BAD_SECTOR || ++errors == max_errors) {
w_command = CMD_IDLE;
return(EIO);
}
}
}
w_command = CMD_IDLE;
return(total);
}
/*===========================================================================*
* com_out *
*===========================================================================*/
PRIVATE int com_out(cmd)
struct command *cmd; /* Command block */
{
/* Output the command block to the winchester controller and return status */
struct wini *wn = w_wn;
unsigned base_cmd = wn->base_cmd;
unsigned base_ctl = wn->base_ctl;
pvb_pair_t outbyte[7]; /* vector for sys_voutb() */
int s; /* status for sys_(v)outb() */
if (w_wn->state & IGNORING) return ERR;
if (!w_waitfor(STATUS_BSY, 0)) {
printf("%s: controller not ready\n", w_name());
return(ERR);
}
/* Select drive. */
if ((s=sys_outb(base_cmd + REG_LDH, cmd->ldh)) != OK)
panic("Couldn't write register to select drive: %d", s);
if (!w_waitfor(STATUS_BSY, 0)) {
printf("%s: com_out: drive not ready\n", w_name());
return(ERR);
}
/* Schedule a wakeup call, some controllers are flaky. This is done with a
* synchronous alarm. If a timeout occurs a notify from CLOCK is sent, so that
* w_intr_wait() can call w_timeout() in case the controller was not able to
* execute the command. Leftover timeouts are simply ignored by the main loop.
*/
sys_setalarm(wakeup_ticks, 0);
wn->w_status = STATUS_ADMBSY;
w_command = cmd->command;
pv_set(outbyte[0], base_ctl + REG_CTL, wn->pheads >= 8 ? CTL_EIGHTHEADS : 0);
pv_set(outbyte[1], base_cmd + REG_PRECOMP, cmd->precomp);
pv_set(outbyte[2], base_cmd + REG_COUNT, cmd->count);
pv_set(outbyte[3], base_cmd + REG_SECTOR, cmd->sector);
pv_set(outbyte[4], base_cmd + REG_CYL_LO, cmd->cyl_lo);
pv_set(outbyte[5], base_cmd + REG_CYL_HI, cmd->cyl_hi);
pv_set(outbyte[6], base_cmd + REG_COMMAND, cmd->command);
if ((s=sys_voutb(outbyte,7)) != OK)
panic("Couldn't write registers with sys_voutb(): %d", s);
return(OK);
}
/*===========================================================================*
* com_out_ext *
*===========================================================================*/
PRIVATE int com_out_ext(cmd)
struct command *cmd; /* Command block */
{
/* Output the command block to the winchester controller and return status */
struct wini *wn = w_wn;
unsigned base_cmd = wn->base_cmd;
unsigned base_ctl = wn->base_ctl;
pvb_pair_t outbyte[11]; /* vector for sys_voutb() */
int s; /* status for sys_(v)outb() */
if (w_wn->state & IGNORING) return ERR;
if (!w_waitfor(STATUS_BSY, 0)) {
printf("%s: controller not ready\n", w_name());
return(ERR);
}
/* Select drive. */
if ((s=sys_outb(base_cmd + REG_LDH, cmd->ldh)) != OK)
panic("Couldn't write register to select drive: %d", s);
if (!w_waitfor(STATUS_BSY, 0)) {
printf("%s: com_out: drive not ready\n", w_name());
return(ERR);
}
/* Schedule a wakeup call, some controllers are flaky. This is done with a
* synchronous alarm. If a timeout occurs a notify from CLOCK is sent, so that
* w_intr_wait() can call w_timeout() in case the controller was not able to
* execute the command. Leftover timeouts are simply ignored by the main loop.
*/
sys_setalarm(wakeup_ticks, 0);
wn->w_status = STATUS_ADMBSY;
w_command = cmd->command;
pv_set(outbyte[0], base_ctl + REG_CTL, 0);
pv_set(outbyte[1], base_cmd + REG_COUNT, cmd->count_prev);
pv_set(outbyte[2], base_cmd + REG_SECTOR, cmd->sector_prev);
pv_set(outbyte[3], base_cmd + REG_CYL_LO, cmd->cyl_lo_prev);
pv_set(outbyte[4], base_cmd + REG_CYL_HI, cmd->cyl_hi_prev);
pv_set(outbyte[5], base_cmd + REG_COUNT, cmd->count);
pv_set(outbyte[6], base_cmd + REG_SECTOR, cmd->sector);
pv_set(outbyte[7], base_cmd + REG_CYL_LO, cmd->cyl_lo);
pv_set(outbyte[8], base_cmd + REG_CYL_HI, cmd->cyl_hi);
pv_set(outbyte[9], base_cmd + REG_COMMAND, cmd->command);
if ((s=sys_voutb(outbyte, 10)) != OK)
panic("Couldn't write registers with sys_voutb(): %d", s);
return(OK);
}
/*===========================================================================*
* setup_dma *
*===========================================================================*/
PRIVATE int setup_dma(
unsigned *sizep,
endpoint_t proc_nr,
iovec_t *iov,
size_t addr_offset,
int UNUSED(do_write)
)
{
phys_bytes user_phys;
unsigned n, offset, size;
int i, j, r;
unsigned long v;
struct wini *wn = w_wn;
int verbose = 0;
/* First try direct scatter/gather to the supplied buffers */
size= *sizep;
i= 0; /* iov index */
j= 0; /* prdt index */
offset= 0; /* Offset in current iov */
if(verbose)
printf("at_wini: setup_dma: proc_nr %d\n", proc_nr);
while (size > 0)
{
if(verbose) {
printf(
"at_wini: setup_dma: iov[%d]: addr 0x%lx, size %ld offset %d, size %d\n",
i, iov[i].iov_addr, iov[i].iov_size, offset, size);
}
n= iov[i].iov_size-offset;
if (n > size)
n= size;
if (n == 0 || (n & 1))
panic("bad size in iov: %d", iov[i].iov_size);
if(proc_nr != SELF) {
r= sys_umap(proc_nr, VM_GRANT, iov[i].iov_addr, n,
&user_phys);
if (r != 0)
panic("can't map user buffer (VM_GRANT): %d", r);
user_phys += offset + addr_offset;
} else {
r= sys_umap(proc_nr, VM_D,
iov[i].iov_addr+offset+addr_offset, n,
&user_phys);
if (r != 0)
panic("can't map user buffer (VM_D): %d", r);
}
if (user_phys & 1)
{
/* Buffer is not aligned */
printf("setup_dma: user buffer is not aligned\n");
return 0;
}
/* vector is not allowed to cross a 64K boundary */
if (user_phys/0x10000 != (user_phys+n-1)/0x10000)
n= ((user_phys/0x10000)+1)*0x10000 - user_phys;
/* vector is not allowed to be bigger than 64K, but we get that
* for free.
*/
if (j >= N_PRDTE)
{
/* Too many entries */
printf("setup_dma: user buffer has too many entries\n");
return 0;
}
prdt[j].prdte_base= user_phys;
prdt[j].prdte_count= n;
prdt[j].prdte_reserved= 0;
prdt[j].prdte_flags= 0;
j++;
offset += n;
if (offset >= iov[i].iov_size)
{
i++;
offset= 0;
addr_offset= 0;
}
size -= n;
}
if (j <= 0 || j > N_PRDTE)
panic("bad prdt index: %d", j);
prdt[j-1].prdte_flags |= PRDTE_FL_EOT;
if(verbose) {
printf("dma not bad\n");
for (i= 0; i<j; i++) {
printf("prdt[%d]: base 0x%lx, size %d, flags 0x%x\n",
i, prdt[i].prdte_base, prdt[i].prdte_count,
prdt[i].prdte_flags);
}
}
/* Verify that the bus master is not active */
r= sys_inb(wn->base_dma + DMA_STATUS, &v);
if (r != 0) panic("setup_dma: sys_inb failed: %d", r);
if (v & DMA_ST_BM_ACTIVE)
panic("Bus master IDE active");
if (prdt_phys & 3)
panic("prdt not aligned: %d", prdt_phys);
r= sys_outl(wn->base_dma + DMA_PRDTP, prdt_phys);
if (r != 0) panic("setup_dma: sys_outl failed: %d", r);
/* Clear interrupt and error flags */
r= sys_outb(wn->base_dma + DMA_STATUS, DMA_ST_INT | DMA_ST_ERROR);
if (r != 0) panic("setup_dma: sys_outb failed: %d", r);
return 1;
}
/*===========================================================================*
* w_need_reset *
*===========================================================================*/
PRIVATE void w_need_reset(void)
{
/* The controller needs to be reset. */
struct wini *wn;
for (wn = wini; wn < &wini[MAX_DRIVES]; wn++) {
if (wn->base_cmd == w_wn->base_cmd) {
wn->state |= DEAF;
wn->state &= ~INITIALIZED;
}
}
}
/*===========================================================================*
* w_do_close *
*===========================================================================*/
PRIVATE int w_do_close(dev_t minor)
{
/* Device close: Release a device. */
if (w_prepare(minor) == NULL)
return(ENXIO);
w_wn->open_ct--;
#if ENABLE_ATAPI
if (w_wn->open_ct == 0 && (w_wn->state & ATAPI)) atapi_close();
#endif
return(OK);
}
/*===========================================================================*
* com_simple *
*===========================================================================*/
PRIVATE int com_simple(cmd)
struct command *cmd; /* Command block */
{
/* A simple controller command, only one interrupt and no data-out phase. */
int r;
if (w_wn->state & IGNORING) return ERR;
if ((r = com_out(cmd)) == OK) r = at_intr_wait();
w_command = CMD_IDLE;
return(r);
}
/*===========================================================================*
* w_timeout *
*===========================================================================*/
PRIVATE void w_timeout(void)
{
struct wini *wn = w_wn;
switch (w_command) {
case CMD_IDLE:
break; /* fine */
case CMD_READ:
case CMD_READ_EXT:
case CMD_WRITE:
case CMD_WRITE_EXT:
/* Impossible, but not on PC's: The controller does not respond. */
/* Limiting multisector I/O seems to help. */
if (wn->max_count > 8 * SECTOR_SIZE) {
wn->max_count = 8 * SECTOR_SIZE;
} else {
wn->max_count = SECTOR_SIZE;
}
/*FALL THROUGH*/
default:
/* Some other command. */
if (w_testing) wn->state |= IGNORING; /* Kick out this drive. */
else if (!w_silent) printf("%s: timeout on command 0x%02x\n",
w_name(), w_command);
w_need_reset();
wn->w_status = 0;
}
}
/*===========================================================================*
* w_reset *
*===========================================================================*/
PRIVATE int w_reset(void)
{
/* Issue a reset to the controller. This is done after any catastrophe,
* like the controller refusing to respond.
*/
int s;
struct wini *wn = w_wn;
/* Don't bother if this drive is forgotten. */
if (w_wn->state & IGNORING) return ERR;
/* Wait for any internal drive recovery. */
tickdelay(RECOVERY_TICKS);
/* Strobe reset bit */
if ((s=sys_outb(wn->base_ctl + REG_CTL, CTL_RESET)) != OK)
panic("Couldn't strobe reset bit: %d", s);
tickdelay(DELAY_TICKS);
if ((s=sys_outb(wn->base_ctl + REG_CTL, 0)) != OK)
panic("Couldn't strobe reset bit: %d", s);
tickdelay(DELAY_TICKS);
/* Wait for controller ready */
if (!w_waitfor(STATUS_BSY, 0)) {
printf("%s: reset failed, drive busy\n", w_name());
return(ERR);
}
/* The error register should be checked now, but some drives mess it up. */
for (wn = wini; wn < &wini[MAX_DRIVES]; wn++) {
if (wn->base_cmd == w_wn->base_cmd) {
wn->state &= ~DEAF;
if (w_wn->irq_need_ack) {
/* Make sure irq is actually enabled.. */
sys_irqenable(&w_wn->irq_hook_id);
}
}
}
return(OK);
}
/*===========================================================================*
* w_intr_wait *
*===========================================================================*/
PRIVATE void w_intr_wait(void)
{
/* Wait for a task completion interrupt. */
int r;
unsigned long w_status;
message m;
int ipc_status;
if (w_wn->irq != NO_IRQ) {
/* Wait for an interrupt that sets w_status to "not busy".
* (w_timeout() also clears w_status.)
*/
while (w_wn->w_status & (STATUS_ADMBSY|STATUS_BSY)) {
int rr;
if((rr=driver_receive(ANY, &m, &ipc_status)) != OK)
panic("driver_receive failed: %d", rr);
if (is_ipc_notify(ipc_status)) {
switch (_ENDPOINT_P(m.m_source)) {
case CLOCK:
/* Timeout. */
w_timeout(); /* a.o. set w_status */
break;
case HARDWARE:
/* Interrupt. */
r= sys_inb(w_wn->base_cmd +
REG_STATUS, &w_status);
if (r != 0)
panic("sys_inb failed: %d", r);
w_wn->w_status= w_status;
ack_irqs(m.NOTIFY_ARG);
break;
default:
/*
* unhandled message. queue it and
* handle it in the blockdriver loop.
*/
blockdriver_mq_queue(&m, ipc_status);
}
}
else {
/*
* unhandled message. queue it and handle it in the
* blockdriver loop.
*/
blockdriver_mq_queue(&m, ipc_status);
}
}
} else {
/* Interrupt not yet allocated; use polling. */
(void) w_waitfor(STATUS_BSY, 0);
}
}
/*===========================================================================*
* at_intr_wait *
*===========================================================================*/
PRIVATE int at_intr_wait(void)
{
/* Wait for an interrupt, study the status bits and return error/success. */
int r, s;
unsigned long inbval;
w_intr_wait();
if ((w_wn->w_status & (STATUS_BSY | STATUS_WF | STATUS_ERR)) == 0) {
r = OK;
} else {
if ((s=sys_inb(w_wn->base_cmd + REG_ERROR, &inbval)) != OK)
panic("Couldn't read register: %d", s);
if ((w_wn->w_status & STATUS_ERR) && (inbval & ERROR_BB)) {
r = ERR_BAD_SECTOR; /* sector marked bad, retries won't help */
} else {
r = ERR; /* any other error */
}
}
w_wn->w_status |= STATUS_ADMBSY; /* assume still busy with I/O */
return(r);
}
/*===========================================================================*
* w_waitfor *
*===========================================================================*/
PRIVATE int w_waitfor(mask, value)
int mask; /* status mask */
int value; /* required status */
{
/* Wait until controller is in the required state. Return zero on timeout.
*/
unsigned long w_status;
spin_t spin;
int s;
SPIN_FOR(&spin, timeout_usecs) {
if ((s=sys_inb(w_wn->base_cmd + REG_STATUS, &w_status)) != OK)
panic("Couldn't read register: %d", s);
w_wn->w_status= w_status;
if ((w_wn->w_status & mask) == value) {
return 1;
}
}
w_need_reset(); /* controller gone deaf */
return(0);
}
/*===========================================================================*
* w_waitfor_dma *
*===========================================================================*/
PRIVATE int w_waitfor_dma(mask, value)
int mask; /* status mask */
int value; /* required status */
{
/* Wait until controller is in the required state. Return zero on timeout.
*/
unsigned long w_status;
spin_t spin;
int s;
SPIN_FOR(&spin, timeout_usecs) {
if ((s=sys_inb(w_wn->base_dma + DMA_STATUS, &w_status)) != OK)
panic("Couldn't read register: %d", s);
if ((w_status & mask) == value) {
return 1;
}
}
return(0);
}
/*===========================================================================*
* w_geometry *
*===========================================================================*/
PRIVATE void w_geometry(dev_t minor, struct partition *entry)
{
struct wini *wn;
if (w_prepare(minor) == NULL) return;
wn = w_wn;
if (wn->state & ATAPI) { /* Make up some numbers. */
entry->cylinders = div64u(wn->part[0].dv_size, SECTOR_SIZE) / (64*32);
entry->heads = 64;
entry->sectors = 32;
} else { /* Return logical geometry. */
entry->cylinders = wn->lcylinders;
entry->heads = wn->lheads;
entry->sectors = wn->lsectors;
}
}
#if ENABLE_ATAPI
/*===========================================================================*
* atapi_open *
*===========================================================================*/
PRIVATE int atapi_open(void)
{
/* Should load and lock the device and obtain its size. For now just set the
* size of the device to something big. What is really needed is a generic
* SCSI layer that does all this stuff for ATAPI and SCSI devices (kjb). (XXX)
*/
w_wn->part[0].dv_size = mul64u(800L*1024, 1024);
return(OK);
}
/*===========================================================================*
* atapi_close *
*===========================================================================*/
PRIVATE void atapi_close(void)
{
/* Should unlock the device. For now do nothing. (XXX) */
}
PRIVATE void sense_request(void)
{
int r, i;
static u8_t sense[100], packet[ATAPI_PACKETSIZE];
packet[0] = SCSI_SENSE;
packet[1] = 0;
packet[2] = 0;
packet[3] = 0;
packet[4] = SENSE_PACKETSIZE;
packet[5] = 0;
packet[7] = 0;
packet[8] = 0;
packet[9] = 0;
packet[10] = 0;
packet[11] = 0;
for(i = 0; i < SENSE_PACKETSIZE; i++) sense[i] = 0xff;
r = atapi_sendpacket(packet, SENSE_PACKETSIZE, 0);
if (r != OK) { printf("request sense command failed\n"); return; }
if (atapi_intr_wait(0, 0) <= 0) { printf("WARNING: request response failed\n"); }
if (sys_insw(w_wn->base_cmd + REG_DATA, SELF, (void *) sense, SENSE_PACKETSIZE) != OK)
printf("WARNING: sense reading failed\n");
printf("sense data:");
for(i = 0; i < SENSE_PACKETSIZE; i++) printf(" %02x", sense[i]);
printf("\n");
}
/*===========================================================================*
* atapi_transfer *
*===========================================================================*/
PRIVATE int atapi_transfer(
int do_write, /* read or write? */
u64_t position, /* offset on device to read or write */
endpoint_t proc_nr, /* process doing the request */
iovec_t *iov, /* pointer to read or write request vector */
unsigned int nr_req /* length of request vector */
)
{
struct wini *wn = w_wn;
iovec_t *iop, *iov_end = iov + nr_req;
int r, s, errors, fresh;
u64_t pos;
unsigned long block;
u64_t dv_size = w_dv->dv_size;
unsigned nbytes, nblocks, before, chunk;
static u8_t packet[ATAPI_PACKETSIZE];
size_t addr_offset = 0;
int dmabytes = 0, piobytes = 0;
ssize_t total = 0;
if (do_write) return(EINVAL);
errors = fresh = 0;
while (nr_req > 0 && !fresh) {
int do_dma = wn->dma && w_atapi_dma;
/* The Minix block size is smaller than the CD block size, so we
* may have to read extra before or after the good data.
*/
pos = add64(w_dv->dv_base, position);
block = div64u(pos, CD_SECTOR_SIZE);
before = rem64u(pos, CD_SECTOR_SIZE);
if(before)
do_dma = 0;
/* How many bytes to transfer? */
nbytes = 0;
for (iop = iov; iop < iov_end; iop++) {
nbytes += iop->iov_size;
if(iop->iov_size % CD_SECTOR_SIZE)
do_dma = 0;
}
/* Data comes in as words, so we have to enforce even byte counts. */
if ((before | nbytes) & 1) return(EINVAL);
/* Which block on disk and how close to EOF? */
if (cmp64(position, dv_size) >= 0) return(total); /* At EOF */
if (cmp64(add64ul(position, nbytes), dv_size) > 0)
nbytes = diff64(dv_size, position);
nblocks = (before + nbytes + CD_SECTOR_SIZE - 1) / CD_SECTOR_SIZE;
/* First check to see if a reinitialization is needed. */
if (!(wn->state & INITIALIZED) && w_specify() != OK) return(EIO);
/* Build an ATAPI command packet. */
packet[0] = SCSI_READ10;
packet[1] = 0;
packet[2] = (block >> 24) & 0xFF;
packet[3] = (block >> 16) & 0xFF;
packet[4] = (block >> 8) & 0xFF;
packet[5] = (block >> 0) & 0xFF;
packet[6] = 0;
packet[7] = (nblocks >> 8) & 0xFF;
packet[8] = (nblocks >> 0) & 0xFF;
packet[9] = 0;
packet[10] = 0;
packet[11] = 0;
if(do_dma) {
stop_dma(wn);
if (!setup_dma(&nbytes, proc_nr, iov, addr_offset, 0)) {
do_dma = 0;
} else if(nbytes != nblocks * CD_SECTOR_SIZE) {
stop_dma(wn);
do_dma = 0;
}
}
/* Tell the controller to execute the packet command. */
r = atapi_sendpacket(packet, nblocks * CD_SECTOR_SIZE, do_dma);
if (r != OK) goto err;
if(do_dma) {
wn->dma_intseen = 0;
start_dma(wn, 0);
w_intr_wait();
if(!wn->dma_intseen) {
if(w_waitfor_dma(DMA_ST_INT, DMA_ST_INT)) {
wn->dma_intseen = 1;
}
}
if(error_dma(wn)) {
printf("Disabling DMA (ATAPI)\n");
wn->dma = 0;
} else {
dmabytes += nbytes;
while (nbytes > 0) {
vir_bytes chunk = nbytes;
if (chunk > iov->iov_size)
chunk = iov->iov_size;
position= add64ul(position, chunk);
nbytes -= chunk;
total += chunk;
if ((iov->iov_size -= chunk) == 0) {
iov++;
nr_req--;
}
}
}
continue;
}
/* Read chunks of data. */
while ((r = atapi_intr_wait(do_dma, nblocks * CD_SECTOR_SIZE)) > 0) {
size_t count;
count = r;
while (before > 0 && count > 0) { /* Discard before. */
chunk = before;
if (chunk > count) chunk = count;
if (chunk > DMA_BUF_SIZE) chunk = DMA_BUF_SIZE;
if ((s=sys_insw(wn->base_cmd + REG_DATA,
SELF, tmp_buf, chunk)) != OK)
panic("Call to sys_insw() failed: %d", s);
before -= chunk;
count -= chunk;
}
while (nbytes > 0 && count > 0) { /* Requested data. */
chunk = nbytes;
if (chunk > count) chunk = count;
if (chunk > iov->iov_size) chunk = iov->iov_size;
if(proc_nr != SELF) {
s=sys_safe_insw(wn->base_cmd + REG_DATA,
proc_nr, (void *) iov->iov_addr,
addr_offset, chunk);
} else {
s=sys_insw(wn->base_cmd + REG_DATA, proc_nr,
(void *) (iov->iov_addr + addr_offset),
chunk);
}
if (s != OK)
panic("Call to sys_insw() failed: %d", s);
position= add64ul(position, chunk);
nbytes -= chunk;
count -= chunk;
addr_offset += chunk;
piobytes += chunk;
fresh = 0;
total += chunk;
if ((iov->iov_size -= chunk) == 0) {
iov++;
nr_req--;
fresh = 1; /* new element is optional */
addr_offset = 0;
}
}
while (count > 0) { /* Excess data. */
chunk = count;
if (chunk > DMA_BUF_SIZE) chunk = DMA_BUF_SIZE;
if ((s=sys_insw(wn->base_cmd + REG_DATA,
SELF, tmp_buf, chunk)) != OK)
panic("Call to sys_insw() failed: %d", s);
count -= chunk;
}
}
if (r < 0) {
err: /* Don't retry if too many errors. */
if (atapi_debug) sense_request();
if (++errors == max_errors) {
w_command = CMD_IDLE;
if (atapi_debug) printf("giving up (%d)\n", errors);
return(EIO);
}
if (atapi_debug) printf("retry (%d)\n", errors);
}
}
#if 0
if(dmabytes) printf("dmabytes %d ", dmabytes);
if(piobytes) printf("piobytes %d", piobytes);
if(dmabytes || piobytes) printf("\n");
#endif
w_command = CMD_IDLE;
return(total);
}
/*===========================================================================*
* atapi_sendpacket *
*===========================================================================*/
PRIVATE int atapi_sendpacket(packet, cnt, do_dma)
u8_t *packet;
unsigned cnt;
int do_dma;
{
/* Send an Atapi Packet Command */
struct wini *wn = w_wn;
pvb_pair_t outbyte[6]; /* vector for sys_voutb() */
int s;
if (wn->state & IGNORING) return ERR;
/* Select Master/Slave drive */
if ((s=sys_outb(wn->base_cmd + REG_DRIVE, wn->ldhpref)) != OK)
panic("Couldn't select master/ slave drive: %d", s);
if (!w_waitfor(STATUS_BSY | STATUS_DRQ, 0)) {
printf("%s: atapi_sendpacket: drive not ready\n", w_name());
return(ERR);
}
/* Schedule a wakeup call, some controllers are flaky. This is done with
* a synchronous alarm. If a timeout occurs a SYN_ALARM message is sent
* from HARDWARE, so that w_intr_wait() can call w_timeout() in case the
* controller was not able to execute the command. Leftover timeouts are
* simply ignored by the main loop.
*/
sys_setalarm(wakeup_ticks, 0);
#if _WORD_SIZE > 2
if (cnt > 0xFFFE) cnt = 0xFFFE; /* Max data per interrupt. */
#endif
w_command = ATAPI_PACKETCMD;
pv_set(outbyte[0], wn->base_cmd + REG_FEAT, do_dma ? FEAT_DMA : 0);
pv_set(outbyte[1], wn->base_cmd + REG_IRR, 0);
pv_set(outbyte[2], wn->base_cmd + REG_SAMTAG, 0);
pv_set(outbyte[3], wn->base_cmd + REG_CNT_LO, (cnt >> 0) & 0xFF);
pv_set(outbyte[4], wn->base_cmd + REG_CNT_HI, (cnt >> 8) & 0xFF);
pv_set(outbyte[5], wn->base_cmd + REG_COMMAND, w_command);
if (atapi_debug) printf("cmd: %x ", w_command);
if ((s=sys_voutb(outbyte,6)) != OK)
panic("Couldn't write registers with sys_voutb(): %d", s);
if (!w_waitfor(STATUS_BSY | STATUS_DRQ, STATUS_DRQ)) {
printf("%s: timeout (BSY|DRQ -> DRQ)\n", w_name());
return(ERR);
}
wn->w_status |= STATUS_ADMBSY; /* Command not at all done yet. */
/* Send the command packet to the device. */
if ((s=sys_outsw(wn->base_cmd + REG_DATA, SELF, packet, ATAPI_PACKETSIZE)) != OK)
panic("sys_outsw() failed: %d", s);
return(OK);
}
#endif /* ENABLE_ATAPI */
/*===========================================================================*
* w_ioctl *
*===========================================================================*/
PRIVATE int w_ioctl(dev_t minor, unsigned int request, endpoint_t endpt,
cp_grant_id_t grant)
{
int r, timeout, prev, count;
struct command cmd;
switch (request) {
case DIOCTIMEOUT:
r= sys_safecopyfrom(endpt, grant, 0, (vir_bytes)&timeout,
sizeof(timeout), D);
if(r != OK)
return r;
if (timeout == 0) {
/* Restore defaults. */
timeout_usecs = DEF_TIMEOUT_USECS;
max_errors = MAX_ERRORS;
wakeup_ticks = WAKEUP_TICKS;
w_silent = 0;
} else if (timeout < 0) {
return EINVAL;
} else {
prev = wakeup_ticks;
if (!w_standard_timeouts) {
/* Set (lower) timeout, lower error
* tolerance and set silent mode.
*/
wakeup_ticks = timeout;
max_errors = 3;
w_silent = 1;
timeout = timeout * 1000000 / sys_hz();
if (timeout_usecs > timeout)
timeout_usecs = timeout;
}
r= sys_safecopyto(endpt, grant, 0, (vir_bytes)&prev,
sizeof(prev), D);
if(r != OK)
return r;
}
return OK;
case DIOCOPENCT:
if (w_prepare(minor) == NULL) return ENXIO;
count = w_wn->open_ct;
r= sys_safecopyto(endpt, grant, 0, (vir_bytes)&count,
sizeof(count), D);
if(r != OK)
return r;
return OK;
case DIOCFLUSH:
if (w_prepare(minor) == NULL) return ENXIO;
if (w_wn->state & ATAPI) return EINVAL;
if (!(w_wn->state & INITIALIZED) && w_specify() != OK)
return EIO;
cmd.command = CMD_FLUSH_CACHE;
if (com_simple(&cmd) != OK || !w_waitfor(STATUS_BSY, 0))
return EIO;
return (w_wn->w_status & (STATUS_ERR|STATUS_WF)) ? EIO : OK;
}
return EINVAL;
}
/*===========================================================================*
* w_hw_int *
*===========================================================================*/
PRIVATE void w_hw_int(unsigned int irqs)
{
/* Leftover interrupt(s) received; ack it/them. */
ack_irqs(irqs);
}
/*===========================================================================*
* ack_irqs *
*===========================================================================*/
PRIVATE void ack_irqs(unsigned int irqs)
{
unsigned int drive;
unsigned long w_status;
for (drive = 0; drive < MAX_DRIVES; drive++) {
if (!(wini[drive].state & IGNORING) && wini[drive].irq_need_ack &&
((1L << wini[drive].irq) & irqs)) {
if (sys_inb((wini[drive].base_cmd + REG_STATUS),
&w_status) != OK)
{
panic("couldn't ack irq on drive: %d", drive);
}
wini[drive].w_status= w_status;
sys_inb(wini[drive].base_dma + DMA_STATUS, &w_status);
if(w_status & DMA_ST_INT) {
sys_outb(wini[drive].base_dma + DMA_STATUS, DMA_ST_INT);
wini[drive].dma_intseen = 1;
}
if (sys_irqenable(&wini[drive].irq_hook_id) != OK)
printf("couldn't re-enable drive %d\n", drive);
}
}
}
#define STSTR(a) if (status & STATUS_ ## a) { strcat(str, #a); strcat(str, " "); }
#define ERRSTR(a) if (e & ERROR_ ## a) { strcat(str, #a); strcat(str, " "); }
PRIVATE char *strstatus(int status)
{
static char str[200];
str[0] = '\0';
STSTR(BSY);
STSTR(DRDY);
STSTR(DMADF);
STSTR(SRVCDSC);
STSTR(DRQ);
STSTR(CORR);
STSTR(CHECK);
return str;
}
PRIVATE char *strerr(int e)
{
static char str[200];
str[0] = '\0';
ERRSTR(BB);
ERRSTR(ECC);
ERRSTR(ID);
ERRSTR(AC);
ERRSTR(TK);
ERRSTR(DM);
return str;
}
#if ENABLE_ATAPI
/*===========================================================================*
* atapi_intr_wait *
*===========================================================================*/
PRIVATE int atapi_intr_wait(int UNUSED(do_dma), size_t UNUSED(max))
{
/* Wait for an interrupt and study the results. Returns a number of bytes
* that need to be transferred, or an error code.
*/
struct wini *wn = w_wn;
pvb_pair_t inbyte[4]; /* vector for sys_vinb() */
int s; /* status for sys_vinb() */
int e;
int len;
int irr;
int r;
int phase;
w_intr_wait();
/* Request series of device I/O. */
inbyte[0].port = wn->base_cmd + REG_ERROR;
inbyte[1].port = wn->base_cmd + REG_CNT_LO;
inbyte[2].port = wn->base_cmd + REG_CNT_HI;
inbyte[3].port = wn->base_cmd + REG_IRR;
if ((s=sys_vinb(inbyte, 4)) != OK)
panic("ATAPI failed sys_vinb(): %d", s);
e = inbyte[0].value;
len = inbyte[1].value;
len |= inbyte[2].value << 8;
irr = inbyte[3].value;
if (wn->w_status & (STATUS_BSY | STATUS_CHECK)) {
if (atapi_debug) {
printf("atapi fail: S=%x=%s E=%02x=%s L=%04x I=%02x\n", wn->w_status, strstatus(wn->w_status), e, strerr(e), len, irr);
}
return ERR;
}
phase = (wn->w_status & STATUS_DRQ) | (irr & (IRR_COD | IRR_IO));
switch (phase) {
case IRR_COD | IRR_IO:
if (ATAPI_DEBUG) printf("ACD: Phase Command Complete\n");
r = OK;
break;
case 0:
if (ATAPI_DEBUG) printf("ACD: Phase Command Aborted\n");
r = ERR;
break;
case STATUS_DRQ | IRR_COD:
if (ATAPI_DEBUG) printf("ACD: Phase Command Out\n");
r = ERR;
break;
case STATUS_DRQ:
if (ATAPI_DEBUG) printf("ACD: Phase Data Out %d\n", len);
r = len;
break;
case STATUS_DRQ | IRR_IO:
if (ATAPI_DEBUG) printf("ACD: Phase Data In %d\n", len);
r = len;
break;
default:
if (ATAPI_DEBUG) printf("ACD: Phase Unknown\n");
r = ERR;
break;
}
wn->w_status |= STATUS_ADMBSY; /* Assume not done yet. */
return(r);
}
#endif /* ENABLE_ATAPI */
#undef sys_voutb
#undef sys_vinb
PRIVATE int at_voutb(pvb_pair_t *pvb, int n)
{
int s, i;
if ((s=sys_voutb(pvb,n)) == OK)
return OK;
printf("at_wini%ld: sys_voutb failed: %d pvb (%d):\n", w_instance, s, n);
for(i = 0; i < n; i++)
printf("%2d: %4x -> %4x\n", i, pvb[i].value, pvb[i].port);
panic("sys_voutb failed");
}
PRIVATE int at_vinb(pvb_pair_t *pvb, int n)
{
int s, i;
if ((s=sys_vinb(pvb,n)) == OK)
return OK;
printf("at_wini%ld: sys_vinb failed: %d pvb (%d):\n", w_instance, s, n);
for(i = 0; i < n; i++)
printf("%2d: %4x\n", i, pvb[i].port);
panic("sys_vinb failed");
}
PRIVATE int at_out(int line, u32_t port, unsigned long value,
char *typename, int type)
{
int s;
s = sys_out(port, value, type);
if(s == OK)
return OK;
printf("at_wini%ld: line %d: %s failed: %d; %lx -> %x\n",
w_instance, line, typename, s, value, port);
panic("sys_out failed");
}
PRIVATE int at_in(int line, u32_t port, unsigned long *value,
char *typename, int type)
{
int s;
s = sys_in(port, value, type);
if(s == OK)
return OK;
printf("at_wini%ld: line %d: %s failed: %d; port %x\n",
w_instance, line, typename, s, port);
panic("sys_in failed");
}
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