static int mei_txe_write(struct mei_device *dev,
struct mei_msg_hdr *header, unsigned char *buf)
{
struct mei_txe_hw *hw = to_txe_hw(dev);
unsigned long rem;
unsigned long length;
int slots = dev->hbuf_depth;
u32 *reg_buf = (u32 *)buf;
u32 dw_cnt;
int i;
if (WARN_ON(!header || !buf))
return -EINVAL;
length = header->length;
dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(header));
dw_cnt = mei_data2slots(length);
if (dw_cnt > slots)
return -EMSGSIZE;
if (WARN(!hw->aliveness, "txe write: aliveness not asserted\n"))
return -EAGAIN;
/* Enable Input Ready Interrupt. */
mei_txe_input_ready_interrupt_enable(dev);
if (!mei_txe_is_input_ready(dev)) {
struct mei_fw_status fw_status;
mei_fw_status(dev, &fw_status);
dev_err(&dev->pdev->dev, "Input is not ready " FW_STS_FMT "\n",
FW_STS_PRM(fw_status));
return -EAGAIN;
}
mei_txe_input_payload_write(dev, 0, *((u32 *)header));
for (i = 0; i < length / 4; i++)
mei_txe_input_payload_write(dev, i + 1, reg_buf[i]);
rem = length & 0x3;
if (rem > 0) {
u32 reg = 0;
memcpy(®, &buf[length - rem], rem);
mei_txe_input_payload_write(dev, i + 1, reg);
}
/* after each write the whole buffer is consumed */
hw->slots = 0;
/* Set Input-Doorbell */
mei_txe_input_doorbell_set(hw);
return 0;
}
/**
* fw_status_show - mei device fw_status attribute show method
*
* @device: device pointer
* @attr: attribute pointer
* @buf: char out buffer
*
* Return: number of the bytes printed into buf or error
*/
static ssize_t fw_status_show(struct device *device,
struct device_attribute *attr, char *buf)
{
struct mei_device *dev = dev_get_drvdata(device);
struct mei_fw_status fw_status;
int err, i;
ssize_t cnt = 0;
mutex_lock(&dev->device_lock);
err = mei_fw_status(dev, &fw_status);
mutex_unlock(&dev->device_lock);
if (err) {
dev_err(device, "read fw_status error = %d\n", err);
return err;
}
for (i = 0; i < fw_status.count; i++)
cnt += scnprintf(buf + cnt, PAGE_SIZE - cnt, "%08X\n",
fw_status.status[i]);
return cnt;
}
