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WSL2-Linux-Kernel
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mfd: cros_ec: Use a zero-length array for command data 

Commit 1b84f2a4cd ("mfd: cros_ec: Use fixed size arrays to transfer
data with the EC") modified the struct cros_ec_command fields to not
use pointers for the input and output buffers and use fixed length
arrays instead.

This change was made because the cros_ec ioctl API uses that struct
cros_ec_command to allow user-space to send commands to the EC and
to get data from the EC. So using pointers made the API not 64-bit
safe. Unfortunately this approach was not flexible enough for all
the use-cases since there may be a need to send larger commands
on newer versions of the EC command protocol.

So to avoid to choose a constant length that it may be too big for
most commands and thus wasting memory and CPU cycles on copy from
and to user-space or having a size that is too small for some big
commands, use a zero-length array that is both 64-bit safe and
flexible. The same buffer is used for both output and input data
so the maximum of these values should be used to allocate it.

Suggested-by: Gwendal Grignou <gwendal@chromium.org>
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Javier Martinez Canillas 2015-06-09 13:04:42 +02:00 коммит произвёл Lee Jones
Родитель bb03ffb96c
Коммит a841178445
10 изменённых файлов: 318 добавлений и 175 удалений
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45
drivers/i2c/busses/i2c-cros-ec-tunnel.c
Просмотреть файл

@ -182,8 +182,9 @@ static int ec_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg i2c_msgs[],
const u16 bus_num = bus->remote_bus;
int request_len;
int response_len;
int alloc_size;
int result;
struct cros_ec_command msg = { };
struct cros_ec_command *msg;
request_len = ec_i2c_count_message(i2c_msgs, num);
if (request_len < 0) {
@ -198,25 +199,39 @@ static int ec_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg i2c_msgs[],
return response_len;
}
result = ec_i2c_construct_message(msg.outdata, i2c_msgs, num, bus_num);
if (result)
return result;
alloc_size = max(request_len, response_len);
msg = kmalloc(sizeof(*msg) + alloc_size, GFP_KERNEL);
if (!msg)
return -ENOMEM;
msg.version = 0;
msg.command = EC_CMD_I2C_PASSTHRU;
msg.outsize = request_len;
msg.insize = response_len;
result = ec_i2c_construct_message(msg->data, i2c_msgs, num, bus_num);
if (result) {
dev_err(dev, "Error constructing EC i2c message %d\n", result);
goto exit;
}
result = cros_ec_cmd_xfer(bus->ec, &msg);
if (result < 0)
return result;
msg->version = 0;
msg->command = EC_CMD_I2C_PASSTHRU;
msg->outsize = request_len;
msg->insize = response_len;
result = ec_i2c_parse_response(msg.indata, i2c_msgs, &num);
if (result < 0)
return result;
result = cros_ec_cmd_xfer(bus->ec, msg);
if (result < 0) {
dev_err(dev, "Error transferring EC i2c message %d\n", result);
goto exit;
}
result = ec_i2c_parse_response(msg->data, i2c_msgs, &num);
if (result < 0) {
dev_err(dev, "Error parsing EC i2c message %d\n", result);
goto exit;
}
/* Indicate success by saying how many messages were sent */
return num;
result = num;
exit:
kfree(msg);
return result;
}
static u32 ec_i2c_functionality(struct i2c_adapter *adap)

29
drivers/input/keyboard/cros_ec_keyb.c
Просмотреть файл

@ -148,19 +148,28 @@ static void cros_ec_keyb_process(struct cros_ec_keyb *ckdev,
static int cros_ec_keyb_get_state(struct cros_ec_keyb *ckdev, uint8_t *kb_state)
{
int ret;
struct cros_ec_command msg = {
.command = EC_CMD_MKBP_STATE,
.insize = ckdev->cols,
};
int ret = 0;
struct cros_ec_command *msg;
ret = cros_ec_cmd_xfer(ckdev->ec, &msg);
if (ret < 0)
return ret;
msg = kmalloc(sizeof(*msg) + ckdev->cols, GFP_KERNEL);
if (!msg)
return -ENOMEM;
memcpy(kb_state, msg.indata, ckdev->cols);
msg->version = 0;
msg->command = EC_CMD_MKBP_STATE;
msg->insize = ckdev->cols;
msg->outsize = 0;
return 0;
ret = cros_ec_cmd_xfer(ckdev->ec, msg);
if (ret < 0) {
dev_err(ckdev->dev, "Error transferring EC message %d\n", ret);
goto exit;
}
memcpy(kb_state, msg->data, ckdev->cols);
exit:
kfree(msg);
return ret;
}
static irqreturn_t cros_ec_keyb_irq(int irq, void *data)

28
drivers/mfd/cros_ec.c
Просмотреть файл

@ -41,7 +41,7 @@ int cros_ec_prepare_tx(struct cros_ec_device *ec_dev,
out[2] = msg->outsize;
csum = out[0] + out[1] + out[2];
for (i = 0; i < msg->outsize; i++)
csum += out[EC_MSG_TX_HEADER_BYTES + i] = msg->outdata[i];
csum += out[EC_MSG_TX_HEADER_BYTES + i] = msg->data[i];
out[EC_MSG_TX_HEADER_BYTES + msg->outsize] = (uint8_t)(csum & 0xff);
return EC_MSG_TX_PROTO_BYTES + msg->outsize;
@ -75,11 +75,20 @@ int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev,
ret = ec_dev->cmd_xfer(ec_dev, msg);
if (msg->result == EC_RES_IN_PROGRESS) {
int i;
struct cros_ec_command status_msg = { };
struct cros_ec_command *status_msg;
struct ec_response_get_comms_status *status;
status_msg.command = EC_CMD_GET_COMMS_STATUS;
status_msg.insize = sizeof(*status);
status_msg = kmalloc(sizeof(*status_msg) + sizeof(*status),
GFP_KERNEL);
if (!status_msg) {
ret = -ENOMEM;
goto exit;
}
status_msg->version = 0;
status_msg->command = EC_CMD_GET_COMMS_STATUS;
status_msg->insize = sizeof(*status);
status_msg->outsize = 0;
/*
* Query the EC's status until it's no longer busy or
@ -88,20 +97,23 @@ int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev,
for (i = 0; i < EC_COMMAND_RETRIES; i++) {
usleep_range(10000, 11000);
ret = ec_dev->cmd_xfer(ec_dev, &status_msg);
ret = ec_dev->cmd_xfer(ec_dev, status_msg);
if (ret < 0)
break;
msg->result = status_msg.result;
if (status_msg.result != EC_RES_SUCCESS)
msg->result = status_msg->result;
if (status_msg->result != EC_RES_SUCCESS)
break;
status = (struct ec_response_get_comms_status *)
status_msg.indata;
status_msg->data;
if (!(status->flags & EC_COMMS_STATUS_PROCESSING))
break;
}
kfree(status_msg);
}
exit:
mutex_unlock(&ec_dev->lock);
return ret;

4
drivers/mfd/cros_ec_i2c.c
Просмотреть файл

@ -76,7 +76,7 @@ static int cros_ec_cmd_xfer_i2c(struct cros_ec_device *ec_dev,
/* copy message payload and compute checksum */
sum = out_buf[0] + out_buf[1] + out_buf[2];
for (i = 0; i < msg->outsize; i++) {
out_buf[3 + i] = msg->outdata[i];
out_buf[3 + i] = msg->data[i];
sum += out_buf[3 + i];
}
out_buf[3 + msg->outsize] = sum;
@ -109,7 +109,7 @@ static int cros_ec_cmd_xfer_i2c(struct cros_ec_device *ec_dev,
/* copy response packet payload and compute checksum */
sum = in_buf[0] + in_buf[1];
for (i = 0; i < len; i++) {
msg->indata[i] = in_buf[2 + i];
msg->data[i] = in_buf[2 + i];
sum += in_buf[2 + i];
}
dev_dbg(ec_dev->dev, "packet: %*ph, sum = %02x\n",

2
drivers/mfd/cros_ec_spi.c
Просмотреть файл

@ -299,7 +299,7 @@ static int cros_ec_cmd_xfer_spi(struct cros_ec_device *ec_dev,
for (i = 0; i < len; i++) {
sum += ptr[i + 2];
if (ec_msg->insize)
ec_msg->indata[i] = ptr[i + 2];
ec_msg->data[i] = ptr[i + 2];
}
sum &= 0xff;

67
drivers/platform/chrome/cros_ec_dev.c
Просмотреть файл

@ -20,6 +20,7 @@
#include <linux/fs.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include "cros_ec_dev.h"
@ -36,28 +37,31 @@ static int ec_get_version(struct cros_ec_device *ec, char *str, int maxlen)
static const char * const current_image_name[] = {
"unknown", "read-only", "read-write", "invalid",
};
struct cros_ec_command msg = {
.version = 0,
.command = EC_CMD_GET_VERSION,
.outdata = { 0 },
.outsize = 0,
.indata = { 0 },
.insize = sizeof(*resp),
};
struct cros_ec_command *msg;
int ret;
ret = cros_ec_cmd_xfer(ec, &msg);
if (ret < 0)
return ret;
msg = kmalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
if (!msg)
return -ENOMEM;
if (msg.result != EC_RES_SUCCESS) {
msg->version = 0;
msg->command = EC_CMD_GET_VERSION;
msg->insize = sizeof(*resp);
msg->outsize = 0;
ret = cros_ec_cmd_xfer(ec, msg);
if (ret < 0)
goto exit;
if (msg->result != EC_RES_SUCCESS) {
snprintf(str, maxlen,
"%s\nUnknown EC version: EC returned %d\n",
CROS_EC_DEV_VERSION, msg.result);
return 0;
CROS_EC_DEV_VERSION, msg->result);
ret = -EINVAL;
goto exit;
}
resp = (struct ec_response_get_version *)msg.indata;
resp = (struct ec_response_get_version *)msg->data;
if (resp->current_image >= ARRAY_SIZE(current_image_name))
resp->current_image = 3; /* invalid */
@ -65,7 +69,10 @@ static int ec_get_version(struct cros_ec_device *ec, char *str, int maxlen)
resp->version_string_ro, resp->version_string_rw,
current_image_name[resp->current_image]);
return 0;
ret = 0;
exit:
kfree(msg);
return ret;
}
/* Device file ops */
@ -110,20 +117,32 @@ static ssize_t ec_device_read(struct file *filp, char __user *buffer,
static long ec_device_ioctl_xcmd(struct cros_ec_device *ec, void __user *arg)
{
long ret;
struct cros_ec_command s_cmd = { };
struct cros_ec_command u_cmd;
struct cros_ec_command *s_cmd;
if (copy_from_user(&s_cmd, arg, sizeof(s_cmd)))
if (copy_from_user(&u_cmd, arg, sizeof(u_cmd)))
return -EFAULT;
ret = cros_ec_cmd_xfer(ec, &s_cmd);
s_cmd = kmalloc(sizeof(*s_cmd) + max(u_cmd.outsize, u_cmd.insize),
GFP_KERNEL);
if (!s_cmd)
return -ENOMEM;
if (copy_from_user(s_cmd, arg, sizeof(*s_cmd) + u_cmd.outsize)) {
ret = -EFAULT;
goto exit;
}
ret = cros_ec_cmd_xfer(ec, s_cmd);
/* Only copy data to userland if data was received. */
if (ret < 0)
return ret;
goto exit;
if (copy_to_user(arg, &s_cmd, sizeof(s_cmd)))
return -EFAULT;
return 0;
if (copy_to_user(arg, s_cmd, sizeof(*s_cmd) + u_cmd.insize))
ret = -EFAULT;
exit:
kfree(s_cmd);
return ret;
}
static long ec_device_ioctl_readmem(struct cros_ec_device *ec, void __user *arg)

152
drivers/platform/chrome/cros_ec_lightbar.c
Просмотреть файл

@ -31,6 +31,7 @@
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
#include "cros_ec_dev.h"
@ -91,54 +92,79 @@ out:
return ret;
}
#define INIT_MSG(P, R) { \
.command = EC_CMD_LIGHTBAR_CMD, \
.outsize = sizeof(*P), \
.insize = sizeof(*R), \
}
static struct cros_ec_command *alloc_lightbar_cmd_msg(void)
{
struct cros_ec_command *msg;
int len;
len = max(sizeof(struct ec_params_lightbar),
sizeof(struct ec_response_lightbar));
msg = kmalloc(sizeof(*msg) + len, GFP_KERNEL);
if (!msg)
return NULL;
msg->version = 0;
msg->command = EC_CMD_LIGHTBAR_CMD;
msg->outsize = sizeof(struct ec_params_lightbar);
msg->insize = sizeof(struct ec_response_lightbar);
return msg;
}
static int get_lightbar_version(struct cros_ec_device *ec,
uint32_t *ver_ptr, uint32_t *flg_ptr)
{
struct ec_params_lightbar *param;
struct ec_response_lightbar *resp;
struct cros_ec_command msg = INIT_MSG(param, resp);
struct cros_ec_command *msg;
int ret;
param = (struct ec_params_lightbar *)msg.outdata;
param->cmd = LIGHTBAR_CMD_VERSION;
ret = cros_ec_cmd_xfer(ec, &msg);
if (ret < 0)
msg = alloc_lightbar_cmd_msg();
if (!msg)
return 0;
switch (msg.result) {
param = (struct ec_params_lightbar *)msg->data;
param->cmd = LIGHTBAR_CMD_VERSION;
ret = cros_ec_cmd_xfer(ec, msg);
if (ret < 0) {
ret = 0;
goto exit;
}
switch (msg->result) {
case EC_RES_INVALID_PARAM:
/* Pixel had no version command. */
if (ver_ptr)
*ver_ptr = 0;
if (flg_ptr)
*flg_ptr = 0;
return 1;
ret = 1;
goto exit;
case EC_RES_SUCCESS:
resp = (struct ec_response_lightbar *)msg.indata;
resp = (struct ec_response_lightbar *)msg->data;
/* Future devices w/lightbars should implement this command */
if (ver_ptr)
*ver_ptr = resp->version.num;
if (flg_ptr)
*flg_ptr = resp->version.flags;
return 1;
ret = 1;
goto exit;
}
/* Anything else (ie, EC_RES_INVALID_COMMAND) - no lightbar */
return 0;
ret = 0;
exit:
kfree(msg);
return ret;
}
static ssize_t version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
uint32_t version, flags;
uint32_t version = 0, flags = 0;
struct cros_ec_device *ec = dev_get_drvdata(dev);
int ret;
@ -158,8 +184,7 @@ static ssize_t brightness_store(struct device *dev,
const char *buf, size_t count)
{
struct ec_params_lightbar *param;
struct ec_response_lightbar *resp;
struct cros_ec_command msg = INIT_MSG(param, resp);
struct cros_ec_command *msg;
int ret;
unsigned int val;
struct cros_ec_device *ec = dev_get_drvdata(dev);
@ -167,21 +192,30 @@ static ssize_t brightness_store(struct device *dev,
if (kstrtouint(buf, 0, &val))
return -EINVAL;
param = (struct ec_params_lightbar *)msg.outdata;
msg = alloc_lightbar_cmd_msg();
if (!msg)
return -ENOMEM;
param = (struct ec_params_lightbar *)msg->data;
param->cmd = LIGHTBAR_CMD_BRIGHTNESS;
param->brightness.num = val;
ret = lb_throttle();
if (ret)
return ret;
goto exit;
ret = cros_ec_cmd_xfer(ec, &msg);
ret = cros_ec_cmd_xfer(ec, msg);
if (ret < 0)
return ret;
goto exit;
if (msg.result != EC_RES_SUCCESS)
return -EINVAL;
if (msg->result != EC_RES_SUCCESS) {
ret = -EINVAL;
goto exit;
}
return count;
ret = count;
exit:
kfree(msg);
return ret;
}
@ -196,12 +230,15 @@ static ssize_t led_rgb_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct ec_params_lightbar *param;
struct ec_response_lightbar *resp;
struct cros_ec_command msg = INIT_MSG(param, resp);
struct cros_ec_command *msg;
struct cros_ec_device *ec = dev_get_drvdata(dev);
unsigned int val[4];
int ret, i = 0, j = 0, ok = 0;
msg = alloc_lightbar_cmd_msg();
if (!msg)
return -ENOMEM;
do {
/* Skip any whitespace */
while (*buf && isspace(*buf))
@ -215,7 +252,7 @@ static ssize_t led_rgb_store(struct device *dev, struct device_attribute *attr,
return -EINVAL;
if (i == 4) {
param = (struct ec_params_lightbar *)msg.outdata;
param = (struct ec_params_lightbar *)msg->data;
param->cmd = LIGHTBAR_CMD_RGB;
param->rgb.led = val[0];
param->rgb.red = val[1];
@ -231,12 +268,14 @@ static ssize_t led_rgb_store(struct device *dev, struct device_attribute *attr,
return ret;
}
ret = cros_ec_cmd_xfer(ec, &msg);
ret = cros_ec_cmd_xfer(ec, msg);
if (ret < 0)
return ret;
goto exit;
if (msg.result != EC_RES_SUCCESS)
return -EINVAL;
if (msg->result != EC_RES_SUCCESS) {
ret = -EINVAL;
goto exit;
}
i = 0;
ok = 1;
@ -248,6 +287,8 @@ static ssize_t led_rgb_store(struct device *dev, struct device_attribute *attr,
} while (*buf);
exit:
kfree(msg);
return (ok && i == 0) ? count : -EINVAL;
}
@ -261,42 +302,55 @@ static ssize_t sequence_show(struct device *dev,
{
struct ec_params_lightbar *param;
struct ec_response_lightbar *resp;
struct cros_ec_command msg = INIT_MSG(param, resp);
struct cros_ec_command *msg;
int ret;
struct cros_ec_device *ec = dev_get_drvdata(dev);
param = (struct ec_params_lightbar *)msg.outdata;
msg = alloc_lightbar_cmd_msg();
if (!msg)
return -ENOMEM;
param = (struct ec_params_lightbar *)msg->data;
param->cmd = LIGHTBAR_CMD_GET_SEQ;
ret = lb_throttle();
if (ret)
return ret;
goto exit;
ret = cros_ec_cmd_xfer(ec, &msg);
ret = cros_ec_cmd_xfer(ec, msg);
if (ret < 0)
return ret;
goto exit;
if (msg.result != EC_RES_SUCCESS)
return scnprintf(buf, PAGE_SIZE,
"ERROR: EC returned %d\n", msg.result);
if (msg->result != EC_RES_SUCCESS) {
ret = scnprintf(buf, PAGE_SIZE,
"ERROR: EC returned %d\n", msg->result);
goto exit;
}
resp = (struct ec_response_lightbar *)msg.indata;
resp = (struct ec_response_lightbar *)msg->data;
if (resp->get_seq.num >= ARRAY_SIZE(seqname))
return scnprintf(buf, PAGE_SIZE, "%d\n", resp->get_seq.num);
ret = scnprintf(buf, PAGE_SIZE, "%d\n", resp->get_seq.num);
else
return scnprintf(buf, PAGE_SIZE, "%s\n",
seqname[resp->get_seq.num]);
ret = scnprintf(buf, PAGE_SIZE, "%s\n",
seqname[resp->get_seq.num]);
exit:
kfree(msg);
return ret;
}
static ssize_t sequence_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct ec_params_lightbar *param;
struct ec_response_lightbar *resp;
struct cros_ec_command msg = INIT_MSG(param, resp);
struct cros_ec_command *msg;
unsigned int num;
int ret, len;
struct cros_ec_device *ec = dev_get_drvdata(dev);
msg = alloc_lightbar_cmd_msg();
if (!msg)
return -ENOMEM;
for (len = 0; len < count; len++)
if (!isalnum(buf[len]))
break;
@ -311,18 +365,18 @@ static ssize_t sequence_store(struct device *dev, struct device_attribute *attr,
return ret;
}
param = (struct ec_params_lightbar *)msg.outdata;
param = (struct ec_params_lightbar *)msg->data;
param->cmd = LIGHTBAR_CMD_SEQ;
param->seq.num = num;
ret = lb_throttle();
if (ret)
return ret;
ret = cros_ec_cmd_xfer(ec, &msg);
ret = cros_ec_cmd_xfer(ec, msg);
if (ret < 0)
return ret;
if (msg.result != EC_RES_SUCCESS)
if (msg->result != EC_RES_SUCCESS)
return -EINVAL;
return count;

8
drivers/platform/chrome/cros_ec_lpc.c
Просмотреть файл

@ -73,8 +73,8 @@ static int cros_ec_cmd_xfer_lpc(struct cros_ec_device *ec,
/* Copy data and update checksum */
for (i = 0; i < msg->outsize; i++) {
outb(msg->outdata[i], EC_LPC_ADDR_HOST_PARAM + i);
csum += msg->outdata[i];
outb(msg->data[i], EC_LPC_ADDR_HOST_PARAM + i);
csum += msg->data[i];
}
/* Finalize checksum and write args */
@ -129,8 +129,8 @@ static int cros_ec_cmd_xfer_lpc(struct cros_ec_device *ec,
/* Read response and update checksum */
for (i = 0; i < args.data_size; i++) {
msg->indata[i] = inb(EC_LPC_ADDR_HOST_PARAM + i);
csum += msg->indata[i];
msg->data[i] = inb(EC_LPC_ADDR_HOST_PARAM + i);
csum += msg->data[i];
}
/* Verify checksum */

152
drivers/platform/chrome/cros_ec_sysfs.c
Просмотреть файл

@ -29,6 +29,7 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/printk.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/types.h>
#include <linux/uaccess.h>
@ -66,14 +67,19 @@ static ssize_t store_ec_reboot(struct device *dev,
{"hibernate", EC_REBOOT_HIBERNATE, 0},
{"at-shutdown", -1, EC_REBOOT_FLAG_ON_AP_SHUTDOWN},
};
struct cros_ec_command msg = { 0 };
struct ec_params_reboot_ec *param =
(struct ec_params_reboot_ec *)msg.outdata;
struct cros_ec_command *msg;
struct ec_params_reboot_ec *param;
int got_cmd = 0, offset = 0;
int i;
int ret;
struct cros_ec_device *ec = dev_get_drvdata(dev);
msg = kmalloc(sizeof(*msg) + sizeof(*param), GFP_KERNEL);
if (!msg)
return -ENOMEM;
param = (struct ec_params_reboot_ec *)msg->data;
param->flags = 0;
while (1) {
/* Find word to start scanning */
@ -100,19 +106,26 @@ static ssize_t store_ec_reboot(struct device *dev,
offset++;
}
if (!got_cmd)
return -EINVAL;
msg.command = EC_CMD_REBOOT_EC;
msg.outsize = sizeof(param);
ret = cros_ec_cmd_xfer(ec, &msg);
if (ret < 0)
return ret;
if (msg.result != EC_RES_SUCCESS) {
dev_dbg(ec->dev, "EC result %d\n", msg.result);
return -EINVAL;
if (!got_cmd) {
count = -EINVAL;
goto exit;
}
msg->version = 0;
msg->command = EC_CMD_REBOOT_EC;
msg->outsize = sizeof(*param);
msg->insize = 0;
ret = cros_ec_cmd_xfer(ec, msg);
if (ret < 0) {
count = ret;
goto exit;
}
if (msg->result != EC_RES_SUCCESS) {
dev_dbg(ec->dev, "EC result %d\n", msg->result);
count = -EINVAL;
}
exit:
kfree(msg);
return count;
}
@ -123,22 +136,32 @@ static ssize_t show_ec_version(struct device *dev,
struct ec_response_get_version *r_ver;
struct ec_response_get_chip_info *r_chip;
struct ec_response_board_version *r_board;
struct cros_ec_command msg = { 0 };
struct cros_ec_command *msg;
int ret;
int count = 0;
struct cros_ec_device *ec = dev_get_drvdata(dev);
/* Get versions. RW may change. */
msg.command = EC_CMD_GET_VERSION;
msg.insize = sizeof(*r_ver);
ret = cros_ec_cmd_xfer(ec, &msg);
if (ret < 0)
return ret;
if (msg.result != EC_RES_SUCCESS)
return scnprintf(buf, PAGE_SIZE,
"ERROR: EC returned %d\n", msg.result);
msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
r_ver = (struct ec_response_get_version *)msg.indata;
/* Get versions. RW may change. */
msg->version = 0;
msg->command = EC_CMD_GET_VERSION;
msg->insize = sizeof(*r_ver);
msg->outsize = 0;
ret = cros_ec_cmd_xfer(ec, msg);
if (ret < 0) {
count = ret;
goto exit;
}
if (msg->result != EC_RES_SUCCESS) {
count = scnprintf(buf, PAGE_SIZE,
"ERROR: EC returned %d\n", msg->result);
goto exit;
}
r_ver = (struct ec_response_get_version *)msg->data;
/* Strings should be null-terminated, but let's be sure. */
r_ver->version_string_ro[sizeof(r_ver->version_string_ro) - 1] = '\0';
r_ver->version_string_rw[sizeof(r_ver->version_string_rw) - 1] = '\0';
@ -152,33 +175,33 @@ static ssize_t show_ec_version(struct device *dev,
image_names[r_ver->current_image] : "?"));
/* Get build info. */
msg.command = EC_CMD_GET_BUILD_INFO;
msg.insize = sizeof(msg.indata);
ret = cros_ec_cmd_xfer(ec, &msg);
msg->command = EC_CMD_GET_BUILD_INFO;
msg->insize = EC_HOST_PARAM_SIZE;
ret = cros_ec_cmd_xfer(ec, msg);
if (ret < 0)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Build info: XFER ERROR %d\n", ret);
else if (msg.result != EC_RES_SUCCESS)
else if (msg->result != EC_RES_SUCCESS)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Build info: EC error %d\n", msg.result);
"Build info: EC error %d\n", msg->result);
else {
msg.indata[sizeof(msg.indata) - 1] = '\0';
msg->data[sizeof(msg->data) - 1] = '\0';
count += scnprintf(buf + count, PAGE_SIZE - count,
"Build info: %s\n", msg.indata);
"Build info: %s\n", msg->data);
}
/* Get chip info. */
msg.command = EC_CMD_GET_CHIP_INFO;
msg.insize = sizeof(*r_chip);
ret = cros_ec_cmd_xfer(ec, &msg);
msg->command = EC_CMD_GET_CHIP_INFO;
msg->insize = sizeof(*r_chip);
ret = cros_ec_cmd_xfer(ec, msg);
if (ret < 0)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip info: XFER ERROR %d\n", ret);
else if (msg.result != EC_RES_SUCCESS)
else if (msg->result != EC_RES_SUCCESS)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip info: EC error %d\n", msg.result);
"Chip info: EC error %d\n", msg->result);
else {
r_chip = (struct ec_response_get_chip_info *)msg.indata;
r_chip = (struct ec_response_get_chip_info *)msg->data;
r_chip->vendor[sizeof(r_chip->vendor) - 1] = '\0';
r_chip->name[sizeof(r_chip->name) - 1] = '\0';
@ -192,23 +215,25 @@ static ssize_t show_ec_version(struct device *dev,
}
/* Get board version */
msg.command = EC_CMD_GET_BOARD_VERSION;
msg.insize = sizeof(*r_board);
ret = cros_ec_cmd_xfer(ec, &msg);
msg->command = EC_CMD_GET_BOARD_VERSION;
msg->insize = sizeof(*r_board);
ret = cros_ec_cmd_xfer(ec, msg);
if (ret < 0)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Board version: XFER ERROR %d\n", ret);
else if (msg.result != EC_RES_SUCCESS)
else if (msg->result != EC_RES_SUCCESS)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Board version: EC error %d\n", msg.result);
"Board version: EC error %d\n", msg->result);
else {
r_board = (struct ec_response_board_version *)msg.indata;
r_board = (struct ec_response_board_version *)msg->data;
count += scnprintf(buf + count, PAGE_SIZE - count,
"Board version: %d\n",
r_board->board_version);
}
exit:
kfree(msg);
return count;
}
@ -216,27 +241,38 @@ static ssize_t show_ec_flashinfo(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ec_response_flash_info *resp;
struct cros_ec_command msg = { 0 };
struct cros_ec_command *msg;
int ret;
struct cros_ec_device *ec = dev_get_drvdata(dev);
msg = kmalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
if (!msg)
return -ENOMEM;
/* The flash info shouldn't ever change, but ask each time anyway. */
msg.command = EC_CMD_FLASH_INFO;
msg.insize = sizeof(*resp);
ret = cros_ec_cmd_xfer(ec, &msg);
msg->version = 0;
msg->command = EC_CMD_FLASH_INFO;
msg->insize = sizeof(*resp);
msg->outsize = 0;
ret = cros_ec_cmd_xfer(ec, msg);
if (ret < 0)
return ret;
if (msg.result != EC_RES_SUCCESS)
return scnprintf(buf, PAGE_SIZE,
"ERROR: EC returned %d\n", msg.result);
goto exit;
if (msg->result != EC_RES_SUCCESS) {
ret = scnprintf(buf, PAGE_SIZE,
"ERROR: EC returned %d\n", msg->result);
goto exit;
}
resp = (struct ec_response_flash_info *)msg.indata;
resp = (struct ec_response_flash_info *)msg->data;
return scnprintf(buf, PAGE_SIZE,
"FlashSize %d\nWriteSize %d\n"
"EraseSize %d\nProtectSize %d\n",
resp->flash_size, resp->write_block_size,
resp->erase_block_size, resp->protect_block_size);
ret = scnprintf(buf, PAGE_SIZE,
"FlashSize %d\nWriteSize %d\n"
"EraseSize %d\nProtectSize %d\n",
resp->flash_size, resp->write_block_size,
resp->erase_block_size, resp->protect_block_size);
exit:
kfree(msg);
return ret;
}
/* Module initialization */

6
include/linux/mfd/cros_ec.h
Просмотреть файл

@ -42,8 +42,7 @@ enum {
* @outsize: Outgoing length in bytes
* @insize: Max number of bytes to accept from EC
* @result: EC's response to the command (separate from communication failure)
* @outdata: Outgoing data to EC
* @indata: Where to put the incoming data from EC
* @data: Where to put the incoming data from EC and outgoing data to EC
*/
struct cros_ec_command {
uint32_t version;
@ -51,8 +50,7 @@ struct cros_ec_command {
uint32_t outsize;
uint32_t insize;
uint32_t result;
uint8_t outdata[EC_PROTO2_MAX_PARAM_SIZE];
uint8_t indata[EC_PROTO2_MAX_PARAM_SIZE];
uint8_t data[0];
};
/**