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minix/drivers/at_wini/at_wini.c
Cristiano Giuffrida cb176df60f New RS and new signal handling for system processes. 
UPDATING INFO:
20100317:
        /usr/src/etc/system.conf updated to ignore default kernel calls: copy
        it (or merge it) to /etc/system.conf.
        The hello driver (/dev/hello) added to the distribution:
        # cd /usr/src/commands/scripts && make clean install
        # cd /dev && MAKEDEV hello

KERNEL CHANGES:
- Generic signal handling support. The kernel no longer assumes PM as a signal
manager for every process. The signal manager of a given process can now be
specified in its privilege slot. When a signal has to be delivered, the kernel
performs the lookup and forwards the signal to the appropriate signal manager.
PM is the default signal manager for user processes, RS is the default signal
manager for system processes. To enable ptrace()ing for system processes, it
is sufficient to change the default signal manager to PM. This will temporarily
disable crash recovery, though.
- sys_exit() is now split into sys_exit() (i.e. exit() for system processes,
which generates a self-termination signal), and sys_clear() (i.e. used by PM
to ask the kernel to clear a process slot when a process exits).
- Added a new kernel call (i.e. sys_update()) to swap two process slots and
implement live update.

PM CHANGES:
- Posix signal handling is no longer allowed for system processes. System
signals are split into two fixed categories: termination and non-termination
signals. When a non-termination signaled is processed, PM transforms the signal
into an IPC message and delivers the message to the system process. When a
termination signal is processed, PM terminates the process.
- PM no longer assumes itself as the signal manager for system processes. It now
makes sure that every system signal goes through the kernel before being
actually processes. The kernel will then dispatch the signal to the appropriate
signal manager which may or may not be PM.

SYSLIB CHANGES:
- Simplified SEF init and LU callbacks.
- Added additional predefined SEF callbacks to debug crash recovery and
live update.
- Fixed a temporary ack in the SEF init protocol. SEF init reply is now
completely synchronous.
- Added SEF signal event type to provide a uniform interface for system
processes to deal with signals. A sef_cb_signal_handler() callback is
available for system processes to handle every received signal. A
sef_cb_signal_manager() callback is used by signal managers to process
system signals on behalf of the kernel.
- Fixed a few bugs with memory mapping and DS.

VM CHANGES:
- Page faults and memory requests coming from the kernel are now implemented
using signals.
- Added a new VM call to swap two process slots and implement live update.
- The call is used by RS at update time and in turn invokes the kernel call
sys_update().

RS CHANGES:
- RS has been reworked with a better functional decomposition.
- Better kernel call masks. com.h now defines the set of very basic kernel calls
every system service is allowed to use. This makes system.conf simpler and
easier to maintain. In addition, this guarantees a higher level of isolation
for system libraries that use one or more kernel calls internally (e.g. printf).
- RS is the default signal manager for system processes. By default, RS
intercepts every signal delivered to every system process. This makes crash
recovery possible before bringing PM and friends in the loop.
- RS now supports fast rollback when something goes wrong while initializing
the new version during a live update.
- Live update is now implemented by keeping the two versions side-by-side and
swapping the process slots when the old version is ready to update.
- Crash recovery is now implemented by keeping the two versions side-by-side
and cleaning up the old version only when the recovery process is complete.

DS CHANGES:
- Fixed a bug when the process doing ds_publish() or ds_delete() is not known
by DS.
- Fixed the completely broken support for strings. String publishing is now
implemented in the system library and simply wraps publishing of memory ranges.
Ideally, we should adopt a similar approach for other data types as well.
- Test suite fixed.

DRIVER CHANGES:
- The hello driver has been added to the Minix distribution to demonstrate basic
live update and crash recovery functionalities.
- Other drivers have been adapted to conform the new SEF interface.
2010-03-17 01:15:29 +00:00

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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>
/* 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_ticks = DEF_TIMEOUT_TICKS;
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 */
/* Unfortunately, DMA_SECTORS and DMA_BUF_SIZE are already defined libdriver
* for '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 */
PRIVATE struct prdte
{
u32_t 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 */
/* Some IDE devices announce themselves as RAID controllers */
PRIVATE struct
{
u16_t vendor;
u16_t device;
} raid_table[]=
{
{ 0x1106, 0x3149 }, /* VIA VT6420 */
{ 0x1095, 0x3512 },
{ 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, (struct driver *dp, message *m_ptr) );
FORWARD _PROTOTYPE( struct device *w_prepare, (int dev) );
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( int w_transfer, (int proc_nr, int opcode, u64_t position,
iovec_t *iov, unsigned nr_req));
FORWARD _PROTOTYPE( int com_out, (struct command *cmd) );
FORWARD _PROTOTYPE( int com_out_ext, (struct command *cmd) );
FORWARD _PROTOTYPE( void setup_dma, (unsigned *sizep, int proc_nr,
iovec_t *iov, size_t addr_offset, int do_write,
int *do_copyoutp) );
FORWARD _PROTOTYPE( void w_need_reset, (void) );
FORWARD _PROTOTYPE( void ack_irqs, (unsigned int) );
FORWARD _PROTOTYPE( int w_do_close, (struct driver *dp, message *m_ptr) );
FORWARD _PROTOTYPE( int w_other, (struct driver *dp, message *m_ptr) );
FORWARD _PROTOTYPE( int w_hw_int, (struct driver *dp, message *m_ptr) );
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, (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 proc_nr, int opcode,
u64_t position, iovec_t *iov, unsigned nr_req) );
#endif
#define sys_voutb(out, n) at_voutb(__LINE__, (out), (n))
FORWARD _PROTOTYPE( int at_voutb, (int line, pvb_pair_t *, int n));
#define sys_vinb(in, n) at_vinb(__LINE__, (in), (n))
FORWARD _PROTOTYPE( int at_vinb, (int line, pvb_pair_t *, int n));
#undef sys_outb
#undef sys_inb
#undef sys_outl
FORWARD _PROTOTYPE( int at_out, (int line, u32_t port, u32_t value,
char *typename, int type));
FORWARD _PROTOTYPE( int at_in, (int line, u32_t port, u32_t *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 driver w_dtab = {
w_name, /* current device's name */
w_do_open, /* open or mount request, initialize device */
w_do_close, /* release device */
do_diocntl, /* get or set a partition's geometry */
w_prepare, /* prepare for I/O on a given minor device */
w_transfer, /* do the I/O */
nop_cleanup, /* nothing to clean up */
w_geometry, /* tell the geometry of the disk */
nop_alarm, /* ignore leftover alarms */
nop_cancel, /* ignore CANCELs */
nop_select, /* ignore selects */
w_other, /* catch-all for unrecognized commands and ioctls */
w_hw_int /* leftover hardware interrupts */
};
/* 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. */
driver_task(&w_dtab, DRIVER_STD);
return(OK);
}
/*===========================================================================*
* sef_local_startup *
*===========================================================================*/
PRIVATE void sef_local_startup()
{
/* 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 type, sef_init_info_t *info)
{
/* Initialize the at_wini driver. */
system_hz = sys_hz();
init_buffer();
w_identify_wakeup_ticks = WAKEUP_TICKS;
wakeup_ticks = WAKEUP_TICKS;
/* Set special disk parameters. */
init_params();
return(OK);
}
/*===========================================================================*
* init_params *
*===========================================================================*/
PRIVATE void init_params()
{
/* 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("ata_std_timeout", "d", 0, &w_standard_timeouts, 0, 1);
env_parse("ata_pci_debug", "d", 0, &w_pci_debug, 0, 1);
env_parse("ata_instance", "d", 0, &w_instance, 0, 8);
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 %d to %d ticks.\n",
w_identify_wakeup_ticks, WAKEUP_TICKS);
w_identify_wakeup_ticks = WAKEUP_TICKS;
}
if (disable_dma) {
printf("at_wini%d: 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%d: 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%d: 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;
}
/*===========================================================================*
* init_params_pci *
*===========================================================================*/
PRIVATE void init_params_pci(int skip)
{
int i, r, devind, drive, pci_compat = 0;
int irq, irq_hook, raid;
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)) {
raid= 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 (t3 == PCI_T3_RAID)
{
for (i= 0; raid_table[i].vendor != 0; i++)
{
if (raid_table[i].vendor == vid &&
raid_table[i].device == did)
{
break;
}
}
if (raid_table[i].vendor == 0)
{
printf(
"atapci skipping unsupported RAID controller 0x%04x / 0x%04x\n",
vid, did);
continue;
}
printf("found supported RAID controller\n");
raid= 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 (raid || (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%d: 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;
}
} else if(w_pci_debug) printf("at_wini%d: dev %d: only compat drives\n", w_instance, devind);
base_dma = pci_attr_r32(devind, PCI_BAR_5) & 0xfffffffc;
/* Primary channel not in compatability mode? */
if (raid || (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%d: 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%d: 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%d: drive %d: base_dma 0x%x\n",
w_instance, i, wini[i].base_dma);
pci_compat = 1;
}
}
}
/* Secondary channel not in compatability mode? */
if (raid || (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%d: 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%d: 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%d: 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%d (compat): pci_reserve %d failed!\n",
w_instance, devind);
}
}
}
}
/*===========================================================================*
* w_do_open *
*===========================================================================*/
PRIVATE int w_do_open(struct driver *dp, message *m_ptr)
{
/* Device open: Initialize the controller and read the partition table. */
struct wini *wn;
if (w_prepare(m_ptr->DEVICE) == NIL_DEV) 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) && (m_ptr->COUNT & 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(int device)
{
/* Prepare for I/O on a device. */
w_device = 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(NIL_DEV);
}
return(w_dv);
}
#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()
{
/* 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()
{
/* 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 r, save_dev;
int save_timeout, save_errors, save_wakeup;
iovec_t iov;
static char *buf;
#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_ticks;
save_errors = max_errors;
save_wakeup = wakeup_ticks;
if (!w_standard_timeouts) {
timeout_ticks = system_hz * 4;
wakeup_ticks = system_hz * 6;
max_errors = 3;
}
w_testing = 1;
/* Try I/O on the actual drive (not any (sub)partition). */
if (w_prepare(w_drive * DEV_PER_DRIVE) == NIL_DEV)
panic("Couldn't switch devices");
r = w_transfer(SELF, DEV_GATHER_S, cvu64(0), &iov, 1);
/* Switch back. */
if (w_prepare(save_dev) == NIL_DEV)
panic("Couldn't switch back devices");
/* Restore parameters. */
timeout_ticks = save_timeout;
max_errors = save_errors;
wakeup_ticks = save_wakeup;
w_testing = 0;
/* Test if everything worked. */
if (r != OK || iov.iov_size != 0) {
return ERR;
}
/* Everything worked. */
return OK;
}
/*===========================================================================*
* w_specify *
*===========================================================================*/
PRIVATE int w_specify()
{
/* 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(struct wini *wn, unsigned int precomp,
unsigned int count, unsigned int sector,
unsigned int opcode, 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 = opcode == DEV_SCATTER_S ? CMD_WRITE_DMA :
CMD_READ_DMA;
}
else
cmd.command = opcode == DEV_SCATTER_S ? CMD_WRITE : CMD_READ;
if (do_lba48) {
if (do_dma)
{
cmd.command = ((opcode == DEV_SCATTER_S) ?
CMD_WRITE_DMA_EXT : CMD_READ_DMA_EXT);
}
else
{
cmd.command = ((opcode == DEV_SCATTER_S) ?
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(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(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(struct wini *wn)
{
int r;
u32_t v;
#define DMAERR(msg) \
printf("at_wini%d: bad DMA: %s. Disabling DMA for drive %d.\n", \
w_instance, msg, wn - wini); \
printf("at_wini%d: 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 int w_transfer(proc_nr, opcode, position, iov, nr_req)
int proc_nr; /* process doing the request */
int opcode; /* DEV_GATHER_S or DEV_SCATTER_S */
u64_t position; /* offset on device to read or write */
iovec_t *iov; /* pointer to read or write request vector */
unsigned nr_req; /* length of request vector */
{
struct wini *wn = w_wn;
iovec_t *iop, *iov_end = iov + nr_req;
int n, r, s, errors, do_dma, do_write, do_copyout;
unsigned long block, w_status;
u64_t dv_size = w_dv->dv_size;
unsigned nbytes;
unsigned dma_buf_offset;
size_t addr_offset = 0;
#if ENABLE_ATAPI
if (w_wn->state & ATAPI) {
return atapi_transfer(proc_nr, opcode, position, 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(OK); /* 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_write= (opcode == DEV_SCATTER_S);
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);
setup_dma(&nbytes, proc_nr, iov, addr_offset, do_write,
&do_copyout);
#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, opcode, do_dma);
if (do_dma)
start_dma(wn, do_write);
if (opcode == DEV_SCATTER_S) {
/* 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;
if (do_copyout)
{
if(proc_nr != SELF) {
s= sys_safecopyto(proc_nr, iov->iov_addr,
addr_offset,
(vir_bytes)dma_buf+dma_buf_offset, n, D);
if (s != OK) {
panic("w_transfer: sys_vircopy failed: %d", s);
}
} else {
memcpy((char *) iov->iov_addr + addr_offset,
dma_buf + dma_buf_offset, n);
}
}
/* Book the bytes successfully transferred. */
nbytes -= n;
position= add64ul(position, 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 (opcode == DEV_GATHER_S) {
/* 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 (opcode == DEV_GATHER_S) {
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;
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(OK);
}
/*===========================================================================*
* 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 void setup_dma(sizep, proc_nr, iov, addr_offset, do_write,
do_copyoutp)
unsigned *sizep;
int proc_nr;
iovec_t *iov;
size_t addr_offset;
int do_write;
int *do_copyoutp;
{
phys_bytes phys, user_phys;
unsigned n, offset, size;
int i, j, r, bad;
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 */
bad= 0;
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%x, size %d 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");
bad= 1;
break;
}
/* 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 */
bad= 1;
break;
}
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 (!bad)
{
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%x, size %d, flags 0x%x\n",
i, prdt[i].prdte_base, prdt[i].prdte_count,
prdt[i].prdte_flags);
}
}
}
/* The caller needs to perform a copy-out from the dma buffer if
* this is a read request and we can't DMA directly to the user's
* buffers.
*/
*do_copyoutp= (!do_write && bad);
if (bad)
{
if(verbose)
printf("partially bad dma\n");
/* Adjust request size */
size= *sizep;
if (size > ATA_DMA_BUF_SIZE)
*sizep= size= ATA_DMA_BUF_SIZE;
if (do_write)
{
/* Copy-in */
for (offset= 0; offset < size; offset += n)
{
n= size-offset;
if (n > iov->iov_size)
n= iov->iov_size;
if(proc_nr != SELF) {
r= sys_safecopyfrom(proc_nr, iov->iov_addr,
addr_offset, (vir_bytes)dma_buf+offset,
n, D);
if (r != OK) {
panic("setup_dma: sys_vircopy failed: %d", r);
}
} else {
memcpy(dma_buf + offset,
(char *) iov->iov_addr + addr_offset,
n);
}
iov++;
addr_offset= 0;
}
}
/* Fill-in the physical region descriptor table */
phys= dma_buf_phys;
if (phys & 1)
{
/* Two byte alignment is required */
panic("bad buffer alignment in setup_dma: 0x%lx", phys);
}
for (j= 0; j<N_PRDTE; i++)
{
if (size == 0) {
panic("bad size in setup_dma: %d", size);
}
if (size & 1)
{
/* Two byte alignment is required for size */
panic("bad size alignment in setup_dma: %d", size);
}
n= size;
/* Buffer is not allowed to cross a 64K boundary */
if (phys / 0x10000 != (phys+n-1) / 0x10000)
{
n= ((phys/0x10000)+1)*0x10000 - phys;
}
prdt[j].prdte_base= phys;
prdt[j].prdte_count= n;
prdt[j].prdte_reserved= 0;
prdt[j].prdte_flags= 0;
size -= n;
if (size == 0)
{
prdt[j].prdte_flags |= PRDTE_FL_EOT;
break;
}
}
if (size != 0)
panic("size to large for prdt");
if(verbose) {
for (i= 0; i<=j; i++)
{
printf("prdt[%d]: base 0x%x, 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);
}
/*===========================================================================*
* w_need_reset *
*===========================================================================*/
PRIVATE void w_need_reset()
{
/* 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(struct driver *dp, message *m_ptr)
{
/* Device close: Release a device. */
if (w_prepare(m_ptr->DEVICE) == NIL_DEV)
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()
{
/* 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()
{
/* Wait for a task completion interrupt. */
int r;
unsigned long w_status;
message m;
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=sef_receive(ANY, &m)) != OK)
panic("sef_receive(ANY) failed: %d", rr);
if (is_notify(m.m_type)) {
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 libdriver loop.
*/
mq_queue(&m);
}
}
else {
/*
* unhandled message. queue it and handle it in the
* libdriver loop.
*/
mq_queue(&m);
}
}
} else {
/* Interrupt not yet allocated; use polling. */
(void) w_waitfor(STATUS_BSY, 0);
}
}
/*===========================================================================*
* at_intr_wait *
*===========================================================================*/
PRIVATE int at_intr_wait()
{
/* 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.
* An alarm that set a timeout flag is used. TIMEOUT is in micros, we need
* ticks. Disabling the alarm is not needed, because a static flag is used
* and a leftover timeout cannot do any harm.
*/
unsigned long w_status;
clock_t t0, t1;
int s;
getuptime(&t0);
do {
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;
}
} while ((s=getuptime(&t1)) == OK && (t1-t0) < timeout_ticks );
if (OK != s) printf("AT_WINI: warning, get_uptime failed: %d\n",s);
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.
* An alarm that set a timeout flag is used. TIMEOUT is in micros, we need
* ticks. Disabling the alarm is not needed, because a static flag is used
* and a leftover timeout cannot do any harm.
*/
unsigned long w_status;
clock_t t0, t1;
int s;
getuptime(&t0);
do {
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;
}
} while ((s=getuptime(&t1)) == OK && (t1-t0) < timeout_ticks );
if (OK != s) printf("AT_WINI: warning, get_uptime failed: %d\n",s);
return(0);
}
/*===========================================================================*
* w_geometry *
*===========================================================================*/
PRIVATE void w_geometry(entry)
struct partition *entry;
{
struct wini *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()
{
/* 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()
{
/* 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(proc_nr, opcode, position, iov, nr_req)
int proc_nr; /* process doing the request */
int opcode; /* DEV_GATHER_S or DEV_SCATTER_S */
u64_t position; /* offset on device to read or write */
iovec_t *iov; /* pointer to read or write request vector */
unsigned 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;
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(OK); /* 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) {
int do_copyout = 0;
stop_dma(wn);
setup_dma(&nbytes, proc_nr, iov, addr_offset, 0,
&do_copyout);
if(do_copyout || (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) {
size_t chunk;
chunk = nbytes;
if (chunk > iov->iov_size)
chunk = iov->iov_size;
position= add64ul(position, chunk);
nbytes -= 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;
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(OK);
}
/*===========================================================================*
* 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_other *
*===========================================================================*/
PRIVATE int w_other(dr, m)
struct driver *dr;
message *m;
{
int r, timeout, prev;
if (m->m_type != DEV_IOCTL_S )
return EINVAL;
if (m->REQUEST == DIOCTIMEOUT) {
r= sys_safecopyfrom(m->IO_ENDPT, (cp_grant_id_t) m->IO_GRANT,
0, (vir_bytes)&timeout, sizeof(timeout), D);
if(r != OK)
return r;
if (timeout == 0) {
/* Restore defaults. */
timeout_ticks = DEF_TIMEOUT_TICKS;
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;
if (timeout_ticks > timeout)
timeout_ticks = timeout;
}
r= sys_safecopyto(m->IO_ENDPT,
(cp_grant_id_t) m->IO_GRANT,
0, (vir_bytes)&prev, sizeof(prev), D);
if(r != OK)
return r;
}
return OK;
} else if (m->REQUEST == DIOCOPENCT) {
int count;
if (w_prepare(m->DEVICE) == NIL_DEV) return ENXIO;
count = w_wn->open_ct;
r= sys_safecopyto(m->IO_ENDPT, (cp_grant_id_t) m->IO_GRANT,
0, (vir_bytes)&count, sizeof(count), D);
if(r != OK)
return r;
return OK;
}
return EINVAL;
}
/*===========================================================================*
* w_hw_int *
*===========================================================================*/
PRIVATE int w_hw_int(dr, m)
struct driver *dr;
message *m;
{
/* Leftover interrupt(s) received; ack it/them. */
ack_irqs(m->NOTIFY_ARG);
return OK;
}
/*===========================================================================*
* 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 do_dma, size_t 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(int line, pvb_pair_t *pvb, int n)
{
int s, i;
if ((s=sys_voutb(pvb,n)) == OK)
return OK;
printf("at_wini%d: 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(int line, pvb_pair_t *pvb, int n)
{
int s, i;
if ((s=sys_vinb(pvb,n)) == OK)
return OK;
printf("at_wini%d: 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, u32_t value,
char *typename, int type)
{
int s;
s = sys_out(port, value, type);
if(s == OK)
return OK;
printf("at_wini%d: line %d: %s failed: %d; %x -> %x\n",
w_instance, line, typename, s, value, port);
panic("sys_out failed");
}
PRIVATE int at_in(int line, u32_t port, u32_t *value,
char *typename, int type)
{
int s;
s = sys_in(port, value, type);
if(s == OK)
return OK;
printf("at_wini%d: line %d: %s failed: %d; port %x\n",
w_instance, line, typename, s, value, port);
panic("sys_in failed");
}
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