ti: k3: drivers: ti_sci: Cleanup sequence ID usage

The sequence ID can be set with a message to identify it when it is
responded to in the response queue. We assign each message a number and
check for this same number to detect response mismatches.

Start this at 0 and increase it by one for each message sent, even ones
that do not request or wait for a response as one may still be delivered
in some cases and we want to detect this.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Change-Id: I72b4d1ef98bf1c1409d9db9db074af8dfbcd83ea

diff --git a/plat/ti/k3/common/drivers/ti_sci/ti_sci.c b/plat/ti/k3/common/drivers/ti_sci/ti_sci.c
index df0b794f854847a759c5ff4ad41e3841555f9ad9..a376e6ea5804b563ae706619520554d6443b8756 100644 (file)
--- a/plat/ti/k3/common/drivers/ti_sci/ti_sci.c
+++ b/plat/ti/k3/common/drivers/ti_sci/ti_sci.c
@@ -45,7 +45,6 @@ static struct ti_sci_info info = {
                .host_id = TI_SCI_HOST_ID,
                .max_msg_size = TI_SCI_MAX_MESSAGE_SIZE,
        },
-       .seq = 0x0a,
 };
 
 /**
@@ -89,10 +88,8 @@ static int ti_sci_setup_one_xfer(uint16_t msg_type, uint32_t msg_flags,
            tx_message_size < sizeof(*hdr))
                return -ERANGE;
 
-       info.seq++;
-
        hdr = (struct ti_sci_msg_hdr *)tx_buf;
-       hdr->seq = info.seq;
+       hdr->seq = ++info.seq;
        hdr->type = msg_type;
        hdr->host = info.desc.host_id;
        hdr->flags = msg_flags | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED;
@@ -425,7 +422,7 @@ int ti_sci_device_put_no_wait(uint32_t id)
                return -ERANGE;
 
        hdr = (struct ti_sci_msg_hdr *)&req;
-       hdr->seq = info.seq;
+       hdr->seq = ++info.seq;
        hdr->type = TI_SCI_MSG_SET_DEVICE_STATE;
        hdr->host = info.desc.host_id;
        /* Setup with NORESPONSE flag to keep response queue clean */
@@ -1408,7 +1405,7 @@ int ti_sci_proc_set_boot_ctrl_no_wait(uint8_t proc_id,
                return -ERANGE;
 
        hdr = (struct ti_sci_msg_hdr *)&req;
-       hdr->seq = info.seq;
+       hdr->seq = ++info.seq;
        hdr->type = TISCI_MSG_SET_PROC_BOOT_CTRL;
        hdr->host = info.desc.host_id;
        /* Setup with NORESPONSE flag to keep response queue clean */
@@ -1650,7 +1647,7 @@ int ti_sci_proc_wait_boot_status_no_wait(uint8_t proc_id,
                return -ERANGE;
 
        hdr = (struct ti_sci_msg_hdr *)&req;
-       hdr->seq = info.seq;
+       hdr->seq = ++info.seq;
        hdr->type = TISCI_MSG_WAIT_PROC_BOOT_STATUS;
        hdr->host = info.desc.host_id;
        /* Setup with NORESPONSE flag to keep response queue clean */