/* Validate the cached NVRAM. if the NVRAM is invalid, load the defaults. */
bool esas2r_nvram_validate(struct esas2r_adapter *a)
{
struct esas2r_sas_nvram *n = a->nvram;
bool rslt = false;
if (n->signature[0] != 'E'
|| n->signature[1] != 'S'
|| n->signature[2] != 'A'
|| n->signature[3] != 'S') {
esas2r_hdebug("invalid NVRAM signature");
} else if (esas2r_nvramcalc_cksum(n)) {
esas2r_hdebug("invalid NVRAM checksum");
} else if (n->version > SASNVR_VERSION) {
esas2r_hdebug("invalid NVRAM version");
} else {
set_bit(AF_NVR_VALID, &a->flags);
rslt = true;
}
if (rslt == false) {
esas2r_hdebug("using defaults");
esas2r_nvram_set_defaults(a);
}
return rslt;
}
static bool esas2r_flash_access(struct esas2r_adapter *a, u32 function)
{
u32 starttime;
u32 timeout;
u32 intstat;
u32 doorbell;
/* Disable chip interrupts awhile */
if (function == DRBL_FLASH_REQ)
esas2r_disable_chip_interrupts(a);
/* Issue the request to the firmware */
esas2r_write_register_dword(a, MU_DOORBELL_IN, function);
/* Now wait for the firmware to process it */
starttime = jiffies_to_msecs(jiffies);
timeout = a->flags &
(AF_CHPRST_PENDING | AF_DISC_PENDING) ? 40000 : 5000;
while (true) {
intstat = esas2r_read_register_dword(a, MU_INT_STATUS_OUT);
if (intstat & MU_INTSTAT_DRBL) {
/* Got a doorbell interrupt. Check for the function */
doorbell =
esas2r_read_register_dword(a, MU_DOORBELL_OUT);
esas2r_write_register_dword(a, MU_DOORBELL_OUT,
doorbell);
if (doorbell & function)
break;
}
schedule_timeout_interruptible(msecs_to_jiffies(100));
if ((jiffies_to_msecs(jiffies) - starttime) > timeout) {
/*
* Iimeout. If we were requesting flash access,
* indicate we are done so the firmware knows we gave
* up. If this was a REQ, we also need to re-enable
* chip interrupts.
*/
if (function == DRBL_FLASH_REQ) {
esas2r_hdebug("flash access timeout");
esas2r_write_register_dword(a, MU_DOORBELL_IN,
DRBL_FLASH_DONE);
esas2r_enable_chip_interrupts(a);
} else {
esas2r_hdebug("flash release timeout");
}
return false;
}
}
/* if we're done, re-enable chip interrupts */
if (function == DRBL_FLASH_DONE)
esas2r_enable_chip_interrupts(a);
return true;
}
struct esas2r_target *esas2r_targ_db_add_raid(struct esas2r_adapter *a,
struct esas2r_disc_context *
dc)
{
struct esas2r_target *t;
esas2r_trace_enter();
if (dc->curr_virt_id >= ESAS2R_MAX_TARGETS) {
esas2r_bugon();
esas2r_trace_exit();
return NULL;
}
t = a->targetdb + dc->curr_virt_id;
if (t->target_state == TS_PRESENT) {
esas2r_trace_exit();
return NULL;
}
esas2r_hdebug("add RAID %s, T:%d", dc->raid_grp_name,
esas2r_targ_get_id(
t,
a));
if (dc->interleave == 0
|| dc->block_size == 0) {
/* these are invalid values, don't create the target entry. */
esas2r_hdebug("invalid RAID group dimensions");
esas2r_trace_exit();
return NULL;
}
t->block_size = dc->block_size;
t->inter_byte = dc->interleave;
t->inter_block = dc->interleave / dc->block_size;
t->virt_targ_id = dc->curr_virt_id;
t->phys_targ_id = ESAS2R_TARG_ID_INV;
t->flags &= ~TF_PASS_THRU;
t->flags |= TF_USED;
t->identifier_len = 0;
t->target_state = TS_PRESENT;
return t;
}
struct esas2r_target *esas2r_targ_db_add_pthru(struct esas2r_adapter *a,
struct esas2r_disc_context *dc,
u8 *ident,
u8 ident_len)
{
struct esas2r_target *t;
esas2r_trace_enter();
if (dc->curr_virt_id >= ESAS2R_MAX_TARGETS) {
esas2r_bugon();
esas2r_trace_exit();
return NULL;
}
/* see if we found this device before. */
t = esas2r_targ_db_find_by_ident(a, ident, ident_len);
if (t == NULL) {
t = a->targetdb + dc->curr_virt_id;
if (ident_len > sizeof(t->identifier)
|| t->target_state == TS_PRESENT) {
esas2r_trace_exit();
return NULL;
}
}
esas2r_hdebug("add PT; T:%d, V:%d, P:%d", esas2r_targ_get_id(t, a),
dc->curr_virt_id,
dc->curr_phys_id);
t->block_size = 0;
t->inter_byte = 0;
t->inter_block = 0;
t->virt_targ_id = dc->curr_virt_id;
t->phys_targ_id = dc->curr_phys_id;
t->identifier_len = ident_len;
memcpy(t->identifier, ident, ident_len);
t->flags |= TF_PASS_THRU | TF_USED;
t->target_state = TS_PRESENT;
return t;
}
/*
* Read and validate current NVRAM parameters by accessing
* physical NVRAM directly. if currently stored parameters are
* invalid, use the defaults.
*/
bool esas2r_nvram_read_direct(struct esas2r_adapter *a)
{
bool result;
if (down_interruptible(&a->nvram_semaphore))
return false;
if (!esas2r_read_flash_block(a, a->nvram, FLS_OFFSET_NVR,
sizeof(struct esas2r_sas_nvram))) {
esas2r_hdebug("NVRAM read failed, using defaults");
return false;
}
result = esas2r_nvram_validate(a);
up(&a->nvram_semaphore);
return result;
}
bool esas2r_print_flash_rev(struct esas2r_adapter *a)
{
u16 year = LOWORD(a->flash_ver);
u8 day = LOBYTE(HIWORD(a->flash_ver));
u8 month = HIBYTE(HIWORD(a->flash_ver));
if (day == 0
|| month == 0
|| day > 31
|| month > 12
|| year < 2006
|| year > 9999) {
strcpy(a->flash_rev, "not found");
a->flash_ver = 0;
return false;
}
sprintf(a->flash_rev, "%02d/%02d/%04d", month, day, year);
esas2r_hdebug("flash version: %s", a->flash_rev);
return true;
}