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|
/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
*/
/*
* Design note:
* This code will enable the 'powernv' to retrieve sensor related data from FSP
* using SPCN passthru mailbox commands.
*
* The OPAL read sensor API in Sapphire is implemented as an 'asynchronous' read
* call that returns after queuing the read request. A unique sensor-id is
* expected as an argument for OPAL read call which has already been exported
* to the device tree during fsp init. The sapphire code decodes this Id to
* determine requested attribute and sensor.
*/
#include <skiboot.h>
#include <fsp.h>
#include <lock.h>
#include <device.h>
#include <spcn.h>
#include <opal-api.h>
#include <opal-msg.h>
#include <errorlog.h>
#include <sensor.h>
#define INVALID_DATA ((uint32_t)-1)
/* Entry size of PRS command modifiers */
#define PRS_STATUS_ENTRY_SZ 0x08
#define SENSOR_PARAM_ENTRY_SZ 0x10
#define SENSOR_DATA_ENTRY_SZ 0x08
#define PROC_JUNC_ENTRY_SZ 0x04
DEFINE_LOG_ENTRY(OPAL_RC_SENSOR_INIT, OPAL_PLATFORM_ERR_EVT, OPAL_SENSOR,
OPAL_MISC_SUBSYSTEM,
OPAL_PREDICTIVE_ERR_FAULT_RECTIFY_REBOOT,
OPAL_NA);
DEFINE_LOG_ENTRY(OPAL_RC_SENSOR_READ, OPAL_PLATFORM_ERR_EVT, OPAL_SENSOR,
OPAL_MISC_SUBSYSTEM, OPAL_INFO,
OPAL_NA);
DEFINE_LOG_ENTRY(OPAL_RC_SENSOR_ASYNC_COMPLETE, OPAL_PLATFORM_ERR_EVT,
OPAL_SENSOR, OPAL_MISC_SUBSYSTEM, OPAL_INFO,
OPAL_NA);
/* FSP response status codes */
enum {
SP_RSP_STATUS_VALID_DATA = 0x00,
SP_RSP_STATUS_INVALID_DATA = 0x22,
SP_RSP_STATUS_SPCN_ERR = 0xA8,
SP_RSP_STATUS_DMA_ERR = 0x24,
};
enum sensor_state {
SENSOR_VALID_DATA,
SENSOR_INVALID_DATA,
SENSOR_SPCN_ERROR,
SENSOR_DMA_ERROR,
SENSOR_PERMANENT_ERROR,
SENSOR_OPAL_ERROR,
};
enum spcn_attr {
/* mod 0x01, 0x02 */
SENSOR_PRESENT,
SENSOR_FAULTED,
SENSOR_AC_FAULTED,
SENSOR_ON,
SENSOR_ON_SUPPORTED,
/* mod 0x10, 0x11 */
SENSOR_THRS,
SENSOR_LOCATION,
/* mod 0x12, 0x13 */
SENSOR_DATA,
/* mod 0x1c */
SENSOR_POWER,
SENSOR_MAX,
};
/* Parsed sensor attributes, passed through OPAL */
struct opal_sensor_data {
uint64_t async_token; /* Asynchronous token */
uint32_t *sensor_data; /* Kernel pointer to copy data */
enum spcn_attr spcn_attr; /* Modifier attribute */
uint16_t rid; /* Sensor RID */
uint8_t frc; /* Sensor resource class */
uint32_t mod_index; /* Modifier index*/
uint32_t offset; /* Offset in sensor buffer */
};
struct spcn_mod_attr {
const char *name;
enum spcn_attr val;
};
struct spcn_mod {
uint8_t mod; /* Modifier code */
uint8_t entry_size; /* Size of each entry in response buffer */
uint16_t entry_count; /* Number of entries */
struct spcn_mod_attr *mod_attr;
};
static struct spcn_mod_attr prs_status_attrs[] = {
{"present", SENSOR_PRESENT},
{"faulted", SENSOR_FAULTED},
{"ac-faulted", SENSOR_AC_FAULTED},
{"on", SENSOR_ON},
{"on-supported", SENSOR_ON_SUPPORTED}
};
static struct spcn_mod_attr sensor_param_attrs[] = {
{"thrs", SENSOR_THRS},
{"loc", SENSOR_LOCATION}
};
static struct spcn_mod_attr sensor_data_attrs[] = {
{"data", SENSOR_DATA}
};
static struct spcn_mod_attr sensor_power_attrs[] = {
{"power", SENSOR_POWER}
};
static struct spcn_mod spcn_mod_data[] = {
{SPCN_MOD_PRS_STATUS_FIRST, PRS_STATUS_ENTRY_SZ, 0,
prs_status_attrs},
{SPCN_MOD_PRS_STATUS_SUBS, PRS_STATUS_ENTRY_SZ, 0,
prs_status_attrs},
{SPCN_MOD_SENSOR_PARAM_FIRST, SENSOR_PARAM_ENTRY_SZ, 0,
sensor_param_attrs},
{SPCN_MOD_SENSOR_PARAM_SUBS, SENSOR_PARAM_ENTRY_SZ, 0,
sensor_param_attrs},
{SPCN_MOD_SENSOR_DATA_FIRST, SENSOR_DATA_ENTRY_SZ, 0,
sensor_data_attrs},
{SPCN_MOD_SENSOR_DATA_SUBS, SENSOR_DATA_ENTRY_SZ, 0,
sensor_data_attrs},
/* TODO Support this modifier '0x14', if required */
/* {SPCN_MOD_PROC_JUNC_TEMP, PROC_JUNC_ENTRY_SZ, 0, NULL}, */
{SPCN_MOD_SENSOR_POWER, SENSOR_DATA_ENTRY_SZ, 0,
sensor_power_attrs},
{SPCN_MOD_LAST, 0xff, 0xffff, NULL}
};
/* Frame resource class (FRC) names */
static const char *frc_names[] = {
/* 0x00 and 0x01 are reserved */
NULL,
NULL,
"power-controller",
"power-supply",
"regulator",
"cooling-fan",
"cooling-controller",
"battery-charger",
"battery-pack",
"amb-temp",
"temp",
"vrm",
"riser-card",
"io-backplane"
};
#define SENSOR_MAX_SIZE 0x00100000
static void *sensor_buffer = NULL;
static enum sensor_state sensor_state;
static bool prev_msg_consumed = true;
static struct lock sensor_lock;
/* Function prototypes */
static int64_t fsp_sensor_send_read_request(struct opal_sensor_data *attr);
static void queue_msg_for_delivery(int rc, struct opal_sensor_data *attr);
/*
* Power Resource Status (PRS)
* Command: 0x42
*
* Modifier: 0x01
* --------------------------------------------------------------------------
* | 0 1 2 3 4 5 6 7 |
* --------------------------------------------------------------------------
* |Frame resrc class| PRID | SRC | Status |
* --------------------------------------------------------------------------
*
*
* Modifier: 0x10
* --------------------------------------------------------------------------
* | 0 1 2 3 4 5 6 7 |
* --------------------------------------------------------------------------
* |Frame resrc class| PRID | Sensor location |
* --------------------------------------------------------------------------
* --------------------------------------------------------------------------
* | 8 9 10 11 12 13 14 15 |
* --------------------------------------------------------------------------
* | Reserved | Reserved | Threshold | Status |
* --------------------------------------------------------------------------
*
*
* Modifier: 0x12
* --------------------------------------------------------------------------
* | 0 1 2 3 4 5 6 7 |
* --------------------------------------------------------------------------
* |Frame resrc class| PRID | Sensor data | Status |
* --------------------------------------------------------------------------
*
*
* Modifier: 0x14
* --------------------------------------------------------------------------
* | 0 1 2 3 |
* --------------------------------------------------------------------------
* |Enclosure Tj Avg | Chip Tj Avg | Reserved | Reserved |
* --------------------------------------------------------------------------
*/
static void fsp_sensor_process_data(struct opal_sensor_data *attr)
{
uint8_t *sensor_buf_ptr = (uint8_t *)sensor_buffer;
uint32_t sensor_data = INVALID_DATA;
uint16_t sensor_mod_data[8];
int count, i;
uint8_t valid, nr_power;
uint32_t power;
for (count = 0; count < spcn_mod_data[attr->mod_index].entry_count;
count++) {
memcpy((void *)sensor_mod_data, sensor_buf_ptr,
spcn_mod_data[attr->mod_index].entry_size);
if (spcn_mod_data[attr->mod_index].mod == SPCN_MOD_PROC_JUNC_TEMP) {
/* TODO Support this modifier '0x14', if required */
} else if (spcn_mod_data[attr->mod_index].mod == SPCN_MOD_SENSOR_POWER) {
valid = sensor_buf_ptr[0];
if (valid & 0x80) {
nr_power = valid & 0x0f;
sensor_data = 0;
for (i=0; i < nr_power; i++) {
power = *(uint32_t *) &sensor_buf_ptr[2 + i * 5];
prlog(PR_TRACE, "Power[%d]: %d mW\n",
i, power);
sensor_data += power/1000;
}
} else {
prlog(PR_TRACE, "Power Sensor data not valid\n");
}
} else if (sensor_mod_data[0] == attr->frc &&
sensor_mod_data[1] == attr->rid) {
switch (attr->spcn_attr) {
/* modifier 0x01, 0x02 */
case SENSOR_PRESENT:
prlog(PR_TRACE,"Not exported to device tree\n");
break;
case SENSOR_FAULTED:
sensor_data = sensor_mod_data[3] & 0x02;
break;
case SENSOR_AC_FAULTED:
case SENSOR_ON:
case SENSOR_ON_SUPPORTED:
prlog(PR_TRACE,"Not exported to device tree\n");
break;
/* modifier 0x10, 0x11 */
case SENSOR_THRS:
sensor_data = sensor_mod_data[6];
break;
case SENSOR_LOCATION:
prlog(PR_TRACE,"Not exported to device tree\n");
break;
/* modifier 0x12, 0x13 */
case SENSOR_DATA:
sensor_data = sensor_mod_data[2];
break;
default:
break;
}
break;
}
sensor_buf_ptr += spcn_mod_data[attr->mod_index].entry_size;
}
*(attr->sensor_data) = sensor_data;
if (sensor_data == INVALID_DATA)
queue_msg_for_delivery(OPAL_PARTIAL, attr);
else
queue_msg_for_delivery(OPAL_SUCCESS, attr);
}
static int fsp_sensor_process_read(struct fsp_msg *resp_msg)
{
uint8_t mbx_rsp_status;
uint32_t size = 0;
mbx_rsp_status = (resp_msg->word1 >> 8) & 0xff;
switch (mbx_rsp_status) {
case SP_RSP_STATUS_VALID_DATA:
sensor_state = SENSOR_VALID_DATA;
size = resp_msg->data.words[1] & 0xffff;
break;
case SP_RSP_STATUS_INVALID_DATA:
log_simple_error(&e_info(OPAL_RC_SENSOR_READ),
"SENSOR: %s: Received invalid data\n", __func__);
sensor_state = SENSOR_INVALID_DATA;
break;
case SP_RSP_STATUS_SPCN_ERR:
log_simple_error(&e_info(OPAL_RC_SENSOR_READ),
"SENSOR: %s: Failure due to SPCN error\n", __func__);
sensor_state = SENSOR_SPCN_ERROR;
break;
case SP_RSP_STATUS_DMA_ERR:
log_simple_error(&e_info(OPAL_RC_SENSOR_READ),
"SENSOR: %s: Failure due to DMA error\n", __func__);
sensor_state = SENSOR_DMA_ERROR;
break;
default:
log_simple_error(&e_info(OPAL_RC_SENSOR_READ),
"SENSOR %s: Read failed, status:0x%02X\n",
__func__, mbx_rsp_status);
sensor_state = SENSOR_INVALID_DATA;
break;
}
return size;
}
static void queue_msg_for_delivery(int rc, struct opal_sensor_data *attr)
{
prlog(PR_INSANE, "%s: rc:%d, data:%d\n",
__func__, rc, *(attr->sensor_data));
opal_queue_msg(OPAL_MSG_ASYNC_COMP, NULL, NULL,
attr->async_token, rc);
spcn_mod_data[attr->mod_index].entry_count = 0;
free(attr);
prev_msg_consumed = true;
}
static void fsp_sensor_read_complete(struct fsp_msg *msg)
{
struct opal_sensor_data *attr = msg->user_data;
enum spcn_rsp_status status;
int rc, size;
prlog(PR_INSANE, "%s()\n", __func__);
status = (msg->resp->data.words[1] >> 24) & 0xff;
size = fsp_sensor_process_read(msg->resp);
fsp_freemsg(msg);
lock(&sensor_lock);
if (sensor_state == SENSOR_VALID_DATA) {
spcn_mod_data[attr->mod_index].entry_count += (size /
spcn_mod_data[attr->mod_index].entry_size);
attr->offset += size;
/* Fetch the subsequent entries of the same modifier type */
if (status == SPCN_RSP_STATUS_COND_SUCCESS) {
switch (spcn_mod_data[attr->mod_index].mod) {
case SPCN_MOD_PRS_STATUS_FIRST:
case SPCN_MOD_SENSOR_PARAM_FIRST:
case SPCN_MOD_SENSOR_DATA_FIRST:
attr->mod_index++;
spcn_mod_data[attr->mod_index].entry_count =
spcn_mod_data[attr->mod_index - 1].
entry_count;
spcn_mod_data[attr->mod_index - 1].entry_count = 0;
break;
default:
break;
}
rc = fsp_sensor_send_read_request(attr);
if (rc != OPAL_ASYNC_COMPLETION)
goto err;
} else { /* Notify 'powernv' of read completion */
fsp_sensor_process_data(attr);
}
} else {
rc = OPAL_INTERNAL_ERROR;
goto err;
}
unlock(&sensor_lock);
return;
err:
*(attr->sensor_data) = INVALID_DATA;
queue_msg_for_delivery(rc, attr);
unlock(&sensor_lock);
log_simple_error(&e_info(OPAL_RC_SENSOR_ASYNC_COMPLETE),
"SENSOR: %s: Failed to queue the "
"read request to fsp\n", __func__);
}
static int64_t fsp_sensor_send_read_request(struct opal_sensor_data *attr)
{
int rc;
struct fsp_msg *msg;
uint32_t *sensor_buf_ptr;
uint32_t align;
uint32_t cmd_header;
prlog(PR_INSANE, "Get the data for modifier [%d]\n",
spcn_mod_data[attr->mod_index].mod);
if (spcn_mod_data[attr->mod_index].mod == SPCN_MOD_PROC_JUNC_TEMP) {
/* TODO Support this modifier '0x14', if required */
align = attr->offset % sizeof(*sensor_buf_ptr);
if (align)
attr->offset += (sizeof(*sensor_buf_ptr) - align);
sensor_buf_ptr = (uint32_t *)((uint8_t *)sensor_buffer +
attr->offset);
/* TODO Add 8 byte command data required for mod 0x14 */
attr->offset += 8;
cmd_header = spcn_mod_data[attr->mod_index].mod << 24 |
SPCN_CMD_PRS << 16 | 0x0008;
} else {
cmd_header = spcn_mod_data[attr->mod_index].mod << 24 |
SPCN_CMD_PRS << 16;
}
msg = fsp_mkmsg(FSP_CMD_SPCN_PASSTHRU, 4,
SPCN_ADDR_MODE_CEC_NODE, cmd_header, 0,
PSI_DMA_SENSOR_BUF + attr->offset);
if (!msg) {
log_simple_error(&e_info(OPAL_RC_SENSOR_READ), "SENSOR: Failed "
"to allocate read message\n");
return OPAL_INTERNAL_ERROR;
}
msg->user_data = attr;
rc = fsp_queue_msg(msg, fsp_sensor_read_complete);
if (rc) {
fsp_freemsg(msg);
msg = NULL;
log_simple_error(&e_info(OPAL_RC_SENSOR_READ), "SENSOR: Failed "
"to queue read message (%d)\n", rc);
return OPAL_INTERNAL_ERROR;
}
return OPAL_ASYNC_COMPLETION;
}
static int64_t parse_sensor_id(uint32_t id, struct opal_sensor_data *attr)
{
uint32_t mod, index;
attr->spcn_attr = id >> 24;
if (attr->spcn_attr >= SENSOR_MAX)
return OPAL_PARAMETER;
if (attr->spcn_attr <= SENSOR_ON_SUPPORTED)
mod = SPCN_MOD_PRS_STATUS_FIRST;
else if (attr->spcn_attr <= SENSOR_LOCATION)
mod = SPCN_MOD_SENSOR_PARAM_FIRST;
else if (attr->spcn_attr <= SENSOR_DATA)
mod = SPCN_MOD_SENSOR_DATA_FIRST;
else if (attr->spcn_attr <= SENSOR_POWER)
mod = SPCN_MOD_SENSOR_POWER;
else
return OPAL_PARAMETER;
for (index = 0; spcn_mod_data[index].mod != SPCN_MOD_LAST; index++) {
if (spcn_mod_data[index].mod == mod)
break;
}
attr->mod_index = index;
attr->frc = (id >> 16) & 0xff;
attr->rid = id & 0xffff;
return 0;
}
int64_t fsp_opal_read_sensor(uint32_t sensor_hndl, int token,
uint32_t *sensor_data)
{
struct opal_sensor_data *attr;
int64_t rc;
prlog(PR_INSANE, "fsp_opal_read_sensor [%08x]\n", sensor_hndl);
if (sensor_state == SENSOR_PERMANENT_ERROR) {
rc = OPAL_HARDWARE;
goto out;
}
if (!sensor_hndl) {
rc = OPAL_PARAMETER;
goto out;
}
lock(&sensor_lock);
if (prev_msg_consumed) {
attr = zalloc(sizeof(*attr));
if (!attr) {
log_simple_error(&e_info(OPAL_RC_SENSOR_READ),
"SENSOR: Failed to allocate memory\n");
rc = OPAL_NO_MEM;
goto out_lock;
}
/* Parse the sensor id and store them to the local structure */
rc = parse_sensor_id(sensor_hndl, attr);
if (rc) {
log_simple_error(&e_info(OPAL_RC_SENSOR_READ),
"SENSOR: %s: Failed to parse the sensor "
"handle[0x%08x]\n", __func__, sensor_hndl);
goto out_free;
}
/* Kernel buffer pointer to copy the data later when ready */
attr->sensor_data = sensor_data;
attr->async_token = token;
rc = fsp_sensor_send_read_request(attr);
if (rc != OPAL_ASYNC_COMPLETION) {
log_simple_error(&e_info(OPAL_RC_SENSOR_READ),
"SENSOR: %s: Failed to queue the read "
"request to fsp\n", __func__);
goto out_free;
}
prev_msg_consumed = false;
} else {
rc = OPAL_BUSY_EVENT;
}
unlock(&sensor_lock);
return rc;
out_free:
free(attr);
out_lock:
unlock(&sensor_lock);
out:
return rc;
}
#define MAX_RIDS 64
#define MAX_NAME 64
static int get_index(uint16_t *prids, uint16_t rid)
{
int index;
for (index = 0; prids[index] && index < MAX_RIDS; index++)
if (prids[index] == rid)
return index;
if (index == MAX_RIDS)
return -1;
prids[index] = rid;
return index;
}
static void create_sensor_nodes(int index, uint16_t frc, uint16_t rid,
uint16_t *prids, struct dt_node *sensors)
{
char name[MAX_NAME];
struct dt_node *fs_node;
uint32_t value;
int rid_index;
switch (spcn_mod_data[index].mod) {
case SPCN_MOD_PRS_STATUS_FIRST:
case SPCN_MOD_PRS_STATUS_SUBS:
switch (frc) {
case SENSOR_FRC_POWER_SUPPLY:
case SENSOR_FRC_COOLING_FAN:
rid_index = get_index(prids, rid);
if (rid_index < 0)
break;
snprintf(name, MAX_NAME, "%s#%d-%s", frc_names[frc],
/* Start enumeration from 1 */
rid_index + 1,
spcn_mod_data[index].mod_attr[1].name);
fs_node = dt_new(sensors, name);
snprintf(name, MAX_NAME, "ibm,opal-sensor-%s",
frc_names[frc]);
dt_add_property_string(fs_node, "compatible", name);
value = spcn_mod_data[index].mod_attr[1].val << 24 |
(frc & 0xff) << 16 | rid;
dt_add_property_cells(fs_node, "sensor-id", value);
break;
default:
break;
}
break;
case SPCN_MOD_SENSOR_PARAM_FIRST:
case SPCN_MOD_SENSOR_PARAM_SUBS:
case SPCN_MOD_SENSOR_DATA_FIRST:
case SPCN_MOD_SENSOR_DATA_SUBS:
switch (frc) {
case SENSOR_FRC_POWER_SUPPLY:
case SENSOR_FRC_COOLING_FAN:
case SENSOR_FRC_AMB_TEMP:
rid_index = get_index(prids, rid);
if (rid_index < 0)
break;
snprintf(name, MAX_NAME, "%s#%d-%s", frc_names[frc],
/* Start enumeration from 1 */
rid_index + 1,
spcn_mod_data[index].mod_attr[0].name);
fs_node = dt_new(sensors, name);
snprintf(name, MAX_NAME, "ibm,opal-sensor-%s",
frc_names[frc]);
dt_add_property_string(fs_node, "compatible", name);
value = spcn_mod_data[index].mod_attr[0].val << 24 |
(frc & 0xff) << 16 | rid;
dt_add_property_cells(fs_node, "sensor-id", value);
if (spcn_mod_data[index].mod == SPCN_MOD_SENSOR_DATA_FIRST &&
frc == SENSOR_FRC_AMB_TEMP)
dt_add_property_string(fs_node, "label", "Ambient");
break;
default:
break;
}
break;
case SPCN_MOD_SENSOR_POWER:
fs_node = dt_new(sensors, "power#1-data");
dt_add_property_string(fs_node, "compatible", "ibm,opal-sensor-power");
value = spcn_mod_data[index].mod_attr[0].val << 24;
dt_add_property_cells(fs_node, "sensor-id", value);
break;
}
}
static void add_sensor_ids(struct dt_node *sensors)
{
uint32_t MAX_FRC_NAMES = sizeof(frc_names) / sizeof(*frc_names);
uint8_t *sensor_buf_ptr = (uint8_t *)sensor_buffer;
uint16_t *prids[MAX_FRC_NAMES];
uint16_t sensor_frc, power_rid;
uint16_t sensor_mod_data[8];
uint32_t index, count;
for (index = 0; index < MAX_FRC_NAMES; index++)
prids[index] = zalloc(MAX_RIDS * sizeof(**prids));
for (index = 0; spcn_mod_data[index].mod != SPCN_MOD_LAST; index++) {
if (spcn_mod_data[index].mod == SPCN_MOD_SENSOR_POWER) {
create_sensor_nodes(index, 0, 0, 0, sensors);
continue;
}
for (count = 0; count < spcn_mod_data[index].entry_count;
count++) {
if (spcn_mod_data[index].mod ==
SPCN_MOD_PROC_JUNC_TEMP) {
/* TODO Support this modifier '0x14', if
* required */
} else {
memcpy((void *)sensor_mod_data, sensor_buf_ptr,
spcn_mod_data[index].entry_size);
sensor_frc = sensor_mod_data[0];
power_rid = sensor_mod_data[1];
if (sensor_frc < MAX_FRC_NAMES &&
frc_names[sensor_frc])
create_sensor_nodes(index, sensor_frc,
power_rid,
prids[sensor_frc],
sensors);
}
sensor_buf_ptr += spcn_mod_data[index].entry_size;
}
}
for (index = 0; index < MAX_FRC_NAMES; index++)
free(prids[index]);
}
static void add_opal_sensor_node(void)
{
int index;
if (!fsp_present())
return;
add_sensor_ids(sensor_node);
/* Reset the entry count of each modifier */
for (index = 0; spcn_mod_data[index].mod != SPCN_MOD_LAST;
index++)
spcn_mod_data[index].entry_count = 0;
}
void fsp_init_sensor(void)
{
uint32_t cmd_header, align, size, psi_dma_offset = 0;
enum spcn_rsp_status status;
uint32_t *sensor_buf_ptr;
struct fsp_msg msg, resp;
int index, rc;
if (!fsp_present()) {
sensor_state = SENSOR_PERMANENT_ERROR;
return;
}
sensor_buffer = memalign(TCE_PSIZE, SENSOR_MAX_SIZE);
if (!sensor_buffer) {
log_simple_error(&e_info(OPAL_RC_SENSOR_INIT), "SENSOR: could "
"not allocate sensor_buffer!\n");
return;
}
/* Map TCE */
fsp_tce_map(PSI_DMA_SENSOR_BUF, sensor_buffer, PSI_DMA_SENSOR_BUF_SZ);
msg.resp = &resp;
/* Traverse using all the modifiers to know all the sensors available
* in the system */
for (index = 0; spcn_mod_data[index].mod != SPCN_MOD_LAST &&
sensor_state == SENSOR_VALID_DATA;) {
prlog(PR_TRACE, "Get the data for modifier [%d]\n",
spcn_mod_data[index].mod);
if (spcn_mod_data[index].mod == SPCN_MOD_PROC_JUNC_TEMP) {
/* TODO Support this modifier 0x14, if required */
align = psi_dma_offset % sizeof(*sensor_buf_ptr);
if (align)
psi_dma_offset += (sizeof(*sensor_buf_ptr) - align);
sensor_buf_ptr = (uint32_t *)((uint8_t *)sensor_buffer
+ psi_dma_offset);
/* TODO Add 8 byte command data required for mod 0x14 */
psi_dma_offset += 8;
cmd_header = spcn_mod_data[index].mod << 24 |
SPCN_CMD_PRS << 16 | 0x0008;
} else {
cmd_header = spcn_mod_data[index].mod << 24 |
SPCN_CMD_PRS << 16;
}
fsp_fillmsg(&msg, FSP_CMD_SPCN_PASSTHRU, 4,
SPCN_ADDR_MODE_CEC_NODE, cmd_header, 0,
PSI_DMA_SENSOR_BUF + psi_dma_offset);
rc = fsp_sync_msg(&msg, false);
if (rc >= 0) {
status = (resp.data.words[1] >> 24) & 0xff;
size = fsp_sensor_process_read(&resp);
psi_dma_offset += size;
spcn_mod_data[index].entry_count += (size /
spcn_mod_data[index].entry_size);
} else {
sensor_state = SENSOR_PERMANENT_ERROR;
break;
}
switch (spcn_mod_data[index].mod) {
case SPCN_MOD_PRS_STATUS_FIRST:
case SPCN_MOD_SENSOR_PARAM_FIRST:
case SPCN_MOD_SENSOR_DATA_FIRST:
if (status == SPCN_RSP_STATUS_COND_SUCCESS)
index++;
else
index += 2;
break;
case SPCN_MOD_PRS_STATUS_SUBS:
case SPCN_MOD_SENSOR_PARAM_SUBS:
case SPCN_MOD_SENSOR_DATA_SUBS:
if (status != SPCN_RSP_STATUS_COND_SUCCESS)
index++;
break;
case SPCN_MOD_SENSOR_POWER:
index++;
default:
break;
}
}
if (sensor_state != SENSOR_VALID_DATA)
sensor_state = SENSOR_PERMANENT_ERROR;
else
add_opal_sensor_node();
}
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