diff options
Diffstat (limited to 'drivers/misc/mei/hw-txe.c')
| -rw-r--r-- | drivers/misc/mei/hw-txe.c | 66 |
1 files changed, 32 insertions, 34 deletions
diff --git a/drivers/misc/mei/hw-txe.c b/drivers/misc/mei/hw-txe.c index c2c8993e2a51..8449fe0367ff 100644 --- a/drivers/misc/mei/hw-txe.c +++ b/drivers/misc/mei/hw-txe.c @@ -31,6 +31,7 @@ #include "mei-trace.h" +#define TXE_HBUF_DEPTH (PAYLOAD_SIZE / MEI_SLOT_SIZE) /** * mei_txe_reg_read - Reads 32bit data from the txe device @@ -681,9 +682,6 @@ static void mei_txe_hw_config(struct mei_device *dev) struct mei_txe_hw *hw = to_txe_hw(dev); - /* Doesn't change in runtime */ - dev->hbuf_depth = PAYLOAD_SIZE / 4; - hw->aliveness = mei_txe_aliveness_get(dev); hw->readiness = mei_txe_readiness_get(dev); @@ -691,37 +689,34 @@ static void mei_txe_hw_config(struct mei_device *dev) hw->aliveness, hw->readiness); } - /** * mei_txe_write - writes a message to device. * * @dev: the device structure - * @header: header of message - * @buf: message buffer will be written + * @hdr: header of message + * @hdr_len: header length in bytes - must multiplication of a slot (4bytes) + * @data: payload + * @data_len: paylead length in bytes * - * Return: 0 if success, <0 - otherwise. + * Return: 0 if success, < 0 - otherwise. */ - static int mei_txe_write(struct mei_device *dev, - struct mei_msg_hdr *header, - const unsigned char *buf) + const void *hdr, size_t hdr_len, + const void *data, size_t data_len) { 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; + const u32 *reg_buf; + u32 slots = TXE_HBUF_DEPTH; u32 dw_cnt; - int i; + unsigned long i, j; - if (WARN_ON(!header || !buf)) + if (WARN_ON(!hdr || !data || hdr_len & 0x3)) return -EINVAL; - length = header->length; - - dev_dbg(dev->dev, MEI_HDR_FMT, MEI_HDR_PRM(header)); + dev_dbg(dev->dev, MEI_HDR_FMT, MEI_HDR_PRM((struct mei_msg_hdr *)hdr)); - dw_cnt = mei_data2slots(length); + dw_cnt = mei_data2slots(hdr_len + data_len); if (dw_cnt > slots) return -EMSGSIZE; @@ -739,17 +734,20 @@ static int mei_txe_write(struct mei_device *dev, return -EAGAIN; } - mei_txe_input_payload_write(dev, 0, *((u32 *)header)); + reg_buf = hdr; + for (i = 0; i < hdr_len / MEI_SLOT_SIZE; i++) + mei_txe_input_payload_write(dev, i, reg_buf[i]); - for (i = 0; i < length / 4; i++) - mei_txe_input_payload_write(dev, i + 1, reg_buf[i]); + reg_buf = data; + for (j = 0; j < data_len / MEI_SLOT_SIZE; j++) + mei_txe_input_payload_write(dev, i + j, reg_buf[j]); - rem = length & 0x3; + rem = data_len & 0x3; if (rem > 0) { u32 reg = 0; - memcpy(®, &buf[length - rem], rem); - mei_txe_input_payload_write(dev, i + 1, reg); + memcpy(®, (const u8 *)data + data_len - rem, rem); + mei_txe_input_payload_write(dev, i + j, reg); } /* after each write the whole buffer is consumed */ @@ -762,15 +760,15 @@ static int mei_txe_write(struct mei_device *dev, } /** - * mei_txe_hbuf_max_len - mimics the me hbuf circular buffer + * mei_txe_hbuf_depth - mimics the me hbuf circular buffer * * @dev: the device structure * - * Return: the PAYLOAD_SIZE - 4 + * Return: the TXE_HBUF_DEPTH */ -static size_t mei_txe_hbuf_max_len(const struct mei_device *dev) +static u32 mei_txe_hbuf_depth(const struct mei_device *dev) { - return PAYLOAD_SIZE - sizeof(struct mei_msg_hdr); + return TXE_HBUF_DEPTH; } /** @@ -778,7 +776,7 @@ static size_t mei_txe_hbuf_max_len(const struct mei_device *dev) * * @dev: the device structure * - * Return: always hbuf_depth + * Return: always TXE_HBUF_DEPTH */ static int mei_txe_hbuf_empty_slots(struct mei_device *dev) { @@ -797,7 +795,7 @@ static int mei_txe_hbuf_empty_slots(struct mei_device *dev) static int mei_txe_count_full_read_slots(struct mei_device *dev) { /* read buffers has static size */ - return PAYLOAD_SIZE / 4; + return TXE_HBUF_DEPTH; } /** @@ -839,7 +837,7 @@ static int mei_txe_read(struct mei_device *dev, dev_dbg(dev->dev, "buffer-length = %lu buf[0]0x%08X\n", len, mei_txe_out_data_read(dev, 0)); - for (i = 0; i < len / 4; i++) { + for (i = 0; i < len / MEI_SLOT_SIZE; i++) { /* skip header: index starts from 1 */ reg = mei_txe_out_data_read(dev, i + 1); dev_dbg(dev->dev, "buf[%d] = 0x%08X\n", i, reg); @@ -1140,7 +1138,7 @@ irqreturn_t mei_txe_irq_thread_handler(int irq, void *dev_id) /* Input Ready: Detection if host can write to SeC */ if (test_and_clear_bit(TXE_INTR_IN_READY_BIT, &hw->intr_cause)) { dev->hbuf_is_ready = true; - hw->slots = dev->hbuf_depth; + hw->slots = TXE_HBUF_DEPTH; } if (hw->aliveness && dev->hbuf_is_ready) { @@ -1186,7 +1184,7 @@ static const struct mei_hw_ops mei_txe_hw_ops = { .hbuf_free_slots = mei_txe_hbuf_empty_slots, .hbuf_is_ready = mei_txe_is_input_ready, - .hbuf_max_len = mei_txe_hbuf_max_len, + .hbuf_depth = mei_txe_hbuf_depth, .write = mei_txe_write, |