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// (qemu-emulated) lsi53c895a boot support.
//
// Copyright (C) 2012 Red Hat Inc.
//
// Authors:
// Gerd Hoffmann <kraxel@redhat.com>
//
// based on virtio-scsi.c which is written by:
// Paolo Bonzini <pbonzini@redhat.com>
//
// This file may be distributed under the terms of the GNU LGPLv3 license.
#include "biosvar.h" // GET_GLOBALFLAT
#include "block.h" // struct drive_s
#include "blockcmd.h" // scsi_drive_setup
#include "config.h" // CONFIG_*
#include "fw/paravirt.h" // runningOnQEMU
#include "malloc.h" // free
#include "output.h" // dprintf
#include "pci.h" // foreachpci
#include "pci_ids.h" // PCI_DEVICE_ID_VIRTIO_BLK
#include "pci_regs.h" // PCI_VENDOR_ID
#include "std/disk.h" // DISK_RET_SUCCESS
#include "string.h" // memset
#include "util.h" // usleep
#define LSI_REG_DSTAT 0x0c
#define LSI_REG_ISTAT0 0x14
#define LSI_REG_DSP0 0x2c
#define LSI_REG_DSP1 0x2d
#define LSI_REG_DSP2 0x2e
#define LSI_REG_DSP3 0x2f
#define LSI_REG_SIST0 0x42
#define LSI_REG_SIST1 0x43
#define LSI_ISTAT0_DIP 0x01
#define LSI_ISTAT0_SIP 0x02
#define LSI_ISTAT0_INTF 0x04
#define LSI_ISTAT0_CON 0x08
#define LSI_ISTAT0_SEM 0x10
#define LSI_ISTAT0_SIGP 0x20
#define LSI_ISTAT0_SRST 0x40
#define LSI_ISTAT0_ABRT 0x80
struct lsi_lun_s {
struct drive_s drive;
struct pci_device *pci;
u32 iobase;
u8 target;
u8 lun;
};
static int
lsi_scsi_cmd(struct lsi_lun_s *llun_gf, struct disk_op_s *op,
void *cdbcmd, u16 target, u16 lun, u16 blocksize)
{
u32 iobase = GET_GLOBALFLAT(llun_gf->iobase);
u32 dma = ((cdb_is_read(cdbcmd, blocksize) ? 0x01000000 : 0x00000000) |
(op->count * blocksize));
u8 msgout[] = {
0x80 | lun, // select lun
0x08,
};
u8 status = 0xff;
u8 msgin_tmp[2];
u8 msgin = 0xff;
u32 script[] = {
/* select target, send scsi command */
0x40000000 | target << 16, // select target
0x00000000,
0x06000001, // msgout
(u32)MAKE_FLATPTR(GET_SEG(SS), &msgout),
0x02000010, // scsi command
(u32)MAKE_FLATPTR(GET_SEG(SS), cdbcmd),
/* handle disconnect */
0x87820000, // phase == msgin ?
0x00000018,
0x07000002, // msgin
(u32)MAKE_FLATPTR(GET_SEG(SS), &msgin_tmp),
0x50000000, // re-select
0x00000000,
0x07000002, // msgin
(u32)MAKE_FLATPTR(GET_SEG(SS), &msgin_tmp),
/* dma data, get status, raise irq */
dma, // dma data
(u32)op->buf_fl,
0x03000001, // status
(u32)MAKE_FLATPTR(GET_SEG(SS), &status),
0x07000001, // msgin
(u32)MAKE_FLATPTR(GET_SEG(SS), &msgin),
0x98080000, // dma irq
0x00000000,
};
u32 dsp = (u32)MAKE_FLATPTR(GET_SEG(SS), &script);
outb(dsp & 0xff, iobase + LSI_REG_DSP0);
outb((dsp >> 8) & 0xff, iobase + LSI_REG_DSP1);
outb((dsp >> 16) & 0xff, iobase + LSI_REG_DSP2);
outb((dsp >> 24) & 0xff, iobase + LSI_REG_DSP3);
for (;;) {
u8 dstat = inb(iobase + LSI_REG_DSTAT);
u8 sist0 = inb(iobase + LSI_REG_SIST0);
u8 sist1 = inb(iobase + LSI_REG_SIST1);
if (sist0 || sist1) {
goto fail;
}
if (dstat & 0x04) {
break;
}
usleep(5);
}
if (msgin == 0 && status == 0) {
return DISK_RET_SUCCESS;
}
fail:
return DISK_RET_EBADTRACK;
}
int
lsi_scsi_cmd_data(struct disk_op_s *op, void *cdbcmd, u16 blocksize)
{
if (!CONFIG_LSI_SCSI)
return DISK_RET_EBADTRACK;
struct lsi_lun_s *llun_gf =
container_of(op->drive_gf, struct lsi_lun_s, drive);
return lsi_scsi_cmd(llun_gf, op, cdbcmd,
GET_GLOBALFLAT(llun_gf->target),
GET_GLOBALFLAT(llun_gf->lun),
blocksize);
}
static int
lsi_scsi_add_lun(struct pci_device *pci, u32 iobase, u8 target, u8 lun)
{
struct lsi_lun_s *llun = malloc_fseg(sizeof(*llun));
if (!llun) {
warn_noalloc();
return -1;
}
memset(llun, 0, sizeof(*llun));
llun->drive.type = DTYPE_LSI_SCSI;
llun->drive.cntl_id = pci->bdf;
llun->pci = pci;
llun->target = target;
llun->lun = lun;
llun->iobase = iobase;
char *name = znprintf(16, "lsi %02x:%02x.%x %d:%d",
pci_bdf_to_bus(pci->bdf), pci_bdf_to_dev(pci->bdf),
pci_bdf_to_fn(pci->bdf), target, lun);
int prio = bootprio_find_scsi_device(pci, target, lun);
int ret = scsi_drive_setup(&llun->drive, name, prio);
free(name);
if (ret)
goto fail;
return 0;
fail:
free(llun);
return -1;
}
static void
lsi_scsi_scan_target(struct pci_device *pci, u32 iobase, u8 target)
{
/* TODO: send REPORT LUNS. For now, only LUN 0 is recognized. */
lsi_scsi_add_lun(pci, iobase, target, 0);
}
static void
init_lsi_scsi(struct pci_device *pci)
{
u16 bdf = pci->bdf;
u32 iobase = pci_config_readl(pci->bdf, PCI_BASE_ADDRESS_0)
& PCI_BASE_ADDRESS_IO_MASK;
pci_config_maskw(bdf, PCI_COMMAND, 0, PCI_COMMAND_MASTER);
dprintf(1, "found lsi53c895a at %02x:%02x.%x, io @ %x\n",
pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf),
pci_bdf_to_fn(bdf), iobase);
// reset
outb(LSI_ISTAT0_SRST, iobase + LSI_REG_ISTAT0);
int i;
for (i = 0; i < 7; i++)
lsi_scsi_scan_target(pci, iobase, i);
return;
}
void
lsi_scsi_setup(void)
{
ASSERT32FLAT();
if (!CONFIG_LSI_SCSI || !runningOnQEMU())
return;
dprintf(3, "init lsi53c895a\n");
struct pci_device *pci;
foreachpci(pci) {
if (pci->vendor != PCI_VENDOR_ID_LSI_LOGIC
|| pci->device != PCI_DEVICE_ID_LSI_53C895A)
continue;
init_lsi_scsi(pci);
}
}
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