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// MegaRAID SAS boot support.
//
// Copyright (C) 2012 Hannes Reinecke, SUSE Linux Products GmbH
//
// Authors:
// Hannes Reinecke <hare@suse.de>
//
// 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 "malloc.h" // free
#include "output.h" // dprintf
#include "pci.h" // foreachpci
#include "pci_ids.h" // PCI_DEVICE_ID_XXX
#include "pci_regs.h" // PCI_VENDOR_ID
#include "stacks.h" // yield
#include "std/disk.h" // DISK_RET_SUCCESS
#include "string.h" // memset
#include "util.h" // timer_calc
#define MFI_DB 0x0 // Doorbell
#define MFI_OMSG0 0x18 // Outbound message 0
#define MFI_IDB 0x20 // Inbound doorbell
#define MFI_ODB 0x2c // Outbound doorbell
#define MFI_IQP 0x40 // Inbound queue port
#define MFI_OSP0 0xb0 // Outbound scratch pad0
#define MFI_IQPL 0xc0 // Inbound queue port (low bytes)
#define MFI_IQPH 0xc4 // Inbound queue port (high bytes)
#define MFI_STATE_MASK 0xf0000000
#define MFI_STATE_WAIT_HANDSHAKE 0x60000000
#define MFI_STATE_BOOT_MESSAGE_PENDING 0x90000000
#define MFI_STATE_READY 0xb0000000
#define MFI_STATE_OPERATIONAL 0xc0000000
#define MFI_STATE_FAULT 0xf0000000
/* MFI Commands */
typedef enum {
MFI_CMD_INIT = 0x00,
MFI_CMD_LD_READ,
MFI_CMD_LD_WRITE,
MFI_CMD_LD_SCSI_IO,
MFI_CMD_PD_SCSI_IO,
MFI_CMD_DCMD,
MFI_CMD_ABORT,
MFI_CMD_SMP,
MFI_CMD_STP
} mfi_cmd_t;
struct megasas_cmd_frame {
u8 cmd; /*00h */
u8 sense_len; /*01h */
u8 cmd_status; /*02h */
u8 scsi_status; /*03h */
u8 target_id; /*04h */
u8 lun; /*05h */
u8 cdb_len; /*06h */
u8 sge_count; /*07h */
u32 context; /*08h */
u32 context_64; /*0Ch */
u16 flags; /*10h */
u16 timeout; /*12h */
u32 data_xfer_len; /*14h */
union {
struct {
u32 opcode; /*18h */
u8 mbox[12]; /*1Ch */
u32 sgl_addr; /*28h */
u32 sgl_len; /*32h */
u32 pad; /*34h */
} dcmd;
struct {
u32 sense_buf_lo; /*18h */
u32 sense_buf_hi; /*1Ch */
u8 cdb[16]; /*20h */
u32 sgl_addr; /*30h */
u32 sgl_len; /*34h */
} pthru;
struct {
u8 pad[22]; /*18h */
} gen;
};
} __attribute__ ((packed));
struct mfi_ld_list_s {
u32 count;
u32 reserved_0;
struct {
u8 target;
u8 lun;
u16 seq;
u8 state;
u8 reserved_1[3];
u64 size;
} lds[64];
} __attribute__ ((packed));
#define MEGASAS_POLL_TIMEOUT 60000 // 60 seconds polling timeout
struct megasas_lun_s {
struct drive_s drive;
struct megasas_cmd_frame *frame;
u32 iobase;
u16 pci_id;
u8 target;
u8 lun;
};
static int megasas_fire_cmd(u16 pci_id, u32 ioaddr,
struct megasas_cmd_frame *frame)
{
u32 frame_addr = (u32)frame;
int frame_count = 1;
u8 cmd_state;
dprintf(2, "Frame 0x%x\n", frame_addr);
if (pci_id == PCI_DEVICE_ID_LSI_SAS2004 ||
pci_id == PCI_DEVICE_ID_LSI_SAS2008) {
outl(0, ioaddr + MFI_IQPH);
outl(frame_addr | frame_count << 1 | 1, ioaddr + MFI_IQPL);
} else if (pci_id == PCI_DEVICE_ID_DELL_PERC5 ||
pci_id == PCI_DEVICE_ID_LSI_SAS1064R ||
pci_id == PCI_DEVICE_ID_LSI_VERDE_ZCR) {
outl(frame_addr >> 3 | frame_count, ioaddr + MFI_IQP);
} else {
outl(frame_addr | frame_count << 1 | 1, ioaddr + MFI_IQP);
}
u32 end = timer_calc(MEGASAS_POLL_TIMEOUT);
do {
for (;;) {
cmd_state = GET_LOWFLAT(frame->cmd_status);
if (cmd_state != 0xff)
break;
if (timer_check(end)) {
warn_timeout();
return -1;
}
yield();
}
} while (cmd_state == 0xff);
if (cmd_state == 0 || cmd_state == 0x2d)
return 0;
dprintf(1, "ERROR: Frame 0x%x, status 0x%x\n", frame_addr, cmd_state);
return -1;
}
int
megasas_cmd_data(struct disk_op_s *op, void *cdbcmd, u16 blocksize)
{
struct megasas_lun_s *mlun_gf =
container_of(op->drive_gf, struct megasas_lun_s, drive);
u8 *cdb = cdbcmd;
struct megasas_cmd_frame *frame = GET_GLOBALFLAT(mlun_gf->frame);
u16 pci_id = GET_GLOBALFLAT(mlun_gf->pci_id);
int i;
if (!CONFIG_MEGASAS)
return DISK_RET_EBADTRACK;
memset_fl(frame, 0, sizeof(*frame));
SET_LOWFLAT(frame->cmd, MFI_CMD_LD_SCSI_IO);
SET_LOWFLAT(frame->cmd_status, 0xFF);
SET_LOWFLAT(frame->target_id, GET_GLOBALFLAT(mlun_gf->target));
SET_LOWFLAT(frame->lun, GET_GLOBALFLAT(mlun_gf->lun));
SET_LOWFLAT(frame->flags, 0x0001);
SET_LOWFLAT(frame->data_xfer_len, op->count * blocksize);
SET_LOWFLAT(frame->cdb_len, 16);
for (i = 0; i < 16; i++) {
SET_LOWFLAT(frame->pthru.cdb[i], cdb[i]);
}
dprintf(2, "pthru cmd 0x%x count %d bs %d\n",
cdb[0], op->count, blocksize);
if (op->count) {
SET_LOWFLAT(frame->pthru.sgl_addr, (u32)op->buf_fl);
SET_LOWFLAT(frame->pthru.sgl_len, op->count * blocksize);
SET_LOWFLAT(frame->sge_count, 1);
}
SET_LOWFLAT(frame->context, (u32)frame);
if (megasas_fire_cmd(pci_id, GET_GLOBALFLAT(mlun_gf->iobase), frame) == 0)
return DISK_RET_SUCCESS;
dprintf(2, "pthru cmd 0x%x failed\n", cdb[0]);
return DISK_RET_EBADTRACK;
}
static int
megasas_add_lun(struct pci_device *pci, u32 iobase, u8 target, u8 lun)
{
struct megasas_lun_s *mlun = malloc_fseg(sizeof(*mlun));
char *name;
int prio, ret = 0;
if (!mlun) {
warn_noalloc();
return -1;
}
memset(mlun, 0, sizeof(*mlun));
mlun->drive.type = DTYPE_MEGASAS;
mlun->drive.cntl_id = pci->bdf;
mlun->pci_id = pci->device;
mlun->target = target;
mlun->lun = lun;
mlun->iobase = iobase;
mlun->frame = memalign_low(256, sizeof(struct megasas_cmd_frame));
if (!mlun->frame) {
warn_noalloc();
free(mlun);
return -1;
}
name = znprintf(36, "MegaRAID SAS (PCI %02x:%02x.%x) LD %d:%d",
pci_bdf_to_bus(pci->bdf), pci_bdf_to_dev(pci->bdf),
pci_bdf_to_fn(pci->bdf), target, lun);
prio = bootprio_find_scsi_device(pci, target, lun);
ret = scsi_drive_setup(&mlun->drive, name, prio);
free(name);
if (ret) {
free(mlun->frame);
free(mlun);
ret = -1;
}
return ret;
}
static void megasas_scan_target(struct pci_device *pci, u32 iobase)
{
struct mfi_ld_list_s ld_list;
struct megasas_cmd_frame *frame = memalign_tmp(256, sizeof(*frame));
int i;
memset(&ld_list, 0, sizeof(ld_list));
memset_fl(frame, 0, sizeof(*frame));
frame->cmd = MFI_CMD_DCMD;
frame->cmd_status = 0xFF;
frame->sge_count = 1;
frame->flags = 0x0011;
frame->data_xfer_len = sizeof(ld_list);
frame->dcmd.opcode = 0x03010000;
frame->dcmd.sgl_addr = (u32)MAKE_FLATPTR(GET_SEG(SS), &ld_list);
frame->dcmd.sgl_len = sizeof(ld_list);
frame->context = (u32)frame;
if (megasas_fire_cmd(pci->device, iobase, frame) == 0) {
dprintf(2, "%d LD found\n", ld_list.count);
for (i = 0; i < ld_list.count; i++) {
dprintf(2, "LD %d:%d state 0x%x\n",
ld_list.lds[i].target, ld_list.lds[i].lun,
ld_list.lds[i].state);
if (ld_list.lds[i].state != 0) {
megasas_add_lun(pci, iobase,
ld_list.lds[i].target, ld_list.lds[i].lun);
}
}
}
}
static int megasas_transition_to_ready(struct pci_device *pci, u32 ioaddr)
{
u32 fw_state = 0, new_state, mfi_flags = 0;
if (pci->device == PCI_DEVICE_ID_LSI_SAS1064R ||
pci->device == PCI_DEVICE_ID_DELL_PERC5)
new_state = inl(ioaddr + MFI_OMSG0) & MFI_STATE_MASK;
else
new_state = inl(ioaddr + MFI_OSP0) & MFI_STATE_MASK;
while (fw_state != new_state) {
switch (new_state) {
case MFI_STATE_FAULT:
dprintf(1, "ERROR: fw in fault state\n");
return -1;
break;
case MFI_STATE_WAIT_HANDSHAKE:
mfi_flags = 0x08;
/* fallthrough */
case MFI_STATE_BOOT_MESSAGE_PENDING:
mfi_flags |= 0x10;
if (pci->device == PCI_DEVICE_ID_LSI_SAS2004 ||
pci->device == PCI_DEVICE_ID_LSI_SAS2008 ||
pci->device == PCI_DEVICE_ID_LSI_SAS2208 ||
pci->device == PCI_DEVICE_ID_LSI_SAS3108) {
outl(ioaddr + MFI_DB, mfi_flags);
} else {
outl(ioaddr + MFI_IDB, mfi_flags);
}
break;
case MFI_STATE_OPERATIONAL:
mfi_flags = 0x07;
if (pci->device == PCI_DEVICE_ID_LSI_SAS2004 ||
pci->device == PCI_DEVICE_ID_LSI_SAS2008 ||
pci->device == PCI_DEVICE_ID_LSI_SAS2208 ||
pci->device == PCI_DEVICE_ID_LSI_SAS3108) {
outl(ioaddr + MFI_DB, mfi_flags);
if (pci->device == PCI_DEVICE_ID_LSI_SAS2208 ||
pci->device == PCI_DEVICE_ID_LSI_SAS3108) {
int j = 0;
u32 doorbell;
while (j < MEGASAS_POLL_TIMEOUT) {
doorbell = inl(ioaddr + MFI_DB) & 1;
if (!doorbell)
break;
msleep(20);
j++;
}
}
} else {
outw(ioaddr + MFI_IDB, mfi_flags);
}
break;
case MFI_STATE_READY:
dprintf(2, "MegaRAID SAS fw ready\n");
return 0;
}
// The current state should not last longer than poll timeout
u32 end = timer_calc(MEGASAS_POLL_TIMEOUT);
for (;;) {
if (timer_check(end)) {
break;
}
yield();
fw_state = new_state;
if (pci->device == PCI_DEVICE_ID_LSI_SAS1064R ||
pci->device == PCI_DEVICE_ID_DELL_PERC5)
new_state = inl(ioaddr + MFI_OMSG0) & MFI_STATE_MASK;
else
new_state = inl(ioaddr + MFI_OSP0) & MFI_STATE_MASK;
if (new_state != fw_state) {
break;
}
}
}
dprintf(1, "ERROR: fw in state %x\n", new_state & MFI_STATE_MASK);
return -1;
}
static void
init_megasas(struct pci_device *pci)
{
u16 bdf = pci->bdf;
u32 iobase = pci_config_readl(pci->bdf, PCI_BASE_ADDRESS_2)
& PCI_BASE_ADDRESS_IO_MASK;
if (!iobase)
iobase = pci_config_readl(pci->bdf, PCI_BASE_ADDRESS_0)
& PCI_BASE_ADDRESS_IO_MASK;
dprintf(1, "found MegaRAID SAS at %02x:%02x.%x, io @ %x\n",
pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf),
pci_bdf_to_fn(bdf), iobase);
pci_config_maskw(pci->bdf, PCI_COMMAND, 0,
PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
// reset
if (megasas_transition_to_ready(pci, iobase) == 0)
megasas_scan_target(pci, iobase);
return;
}
void
megasas_setup(void)
{
ASSERT32FLAT();
if (!CONFIG_MEGASAS)
return;
dprintf(3, "init megasas\n");
struct pci_device *pci;
foreachpci(pci) {
if (pci->vendor != PCI_VENDOR_ID_LSI_LOGIC &&
pci->vendor != PCI_VENDOR_ID_DELL)
continue;
if (pci->device == PCI_DEVICE_ID_LSI_SAS1064R ||
pci->device == PCI_DEVICE_ID_LSI_SAS1078 ||
pci->device == PCI_DEVICE_ID_LSI_SAS1078DE ||
pci->device == PCI_DEVICE_ID_LSI_SAS2108 ||
pci->device == PCI_DEVICE_ID_LSI_SAS2108E ||
pci->device == PCI_DEVICE_ID_LSI_SAS2004 ||
pci->device == PCI_DEVICE_ID_LSI_SAS2008 ||
pci->device == PCI_DEVICE_ID_LSI_VERDE_ZCR ||
pci->device == PCI_DEVICE_ID_DELL_PERC5 ||
pci->device == PCI_DEVICE_ID_LSI_SAS2208 ||
pci->device == PCI_DEVICE_ID_LSI_SAS3108)
init_megasas(pci);
}
}
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