[PATCH net-next 1/2] eth: fbnic: Add mailbox support for PLDM updates
From: Lee Trager
Date: Fri Oct 11 2024 - 22:38:42 EST
This adds driver support to utilize the kernel completion API. This allows
the driver to block on a response from firmware. Initially
fbnic_fw_completion only has support for updates, future patches will add
additional features.
Signed-off-by: Lee Trager <lee@xxxxxxxxx>
---
drivers/net/ethernet/meta/fbnic/fbnic.h | 1 +
drivers/net/ethernet/meta/fbnic/fbnic_fw.c | 263 +++++++++++++++++++++
drivers/net/ethernet/meta/fbnic/fbnic_fw.h | 59 +++++
3 files changed, 323 insertions(+)
diff --git a/drivers/net/ethernet/meta/fbnic/fbnic.h b/drivers/net/ethernet/meta/fbnic/fbnic.h
index ca59261f0155..f58727e6e45a 100644
--- a/drivers/net/ethernet/meta/fbnic/fbnic.h
+++ b/drivers/net/ethernet/meta/fbnic/fbnic.h
@@ -31,6 +31,7 @@ struct fbnic_dev {
struct fbnic_fw_mbx mbx[FBNIC_IPC_MBX_INDICES];
struct fbnic_fw_cap fw_cap;
+ struct fbnic_fw_completion *cmpl_data;
/* Lock protecting Tx Mailbox queue to prevent possible races */
spinlock_t fw_tx_lock;
diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_fw.c b/drivers/net/ethernet/meta/fbnic/fbnic_fw.c
index 8f7a2a19ddf8..deebff3b6821 100644
--- a/drivers/net/ethernet/meta/fbnic/fbnic_fw.c
+++ b/drivers/net/ethernet/meta/fbnic/fbnic_fw.c
@@ -207,6 +207,38 @@ static int fbnic_mbx_map_tlv_msg(struct fbnic_dev *fbd,
return err;
}
+static int fbnic_mbx_map_req_w_cmpl(struct fbnic_dev *fbd,
+ struct fbnic_tlv_msg *msg,
+ struct fbnic_fw_completion *cmpl_data)
+{
+ unsigned long flags;
+ int err;
+
+ spin_lock_irqsave(&fbd->fw_tx_lock, flags);
+
+ /* If we are already waiting on a completion then abort */
+ if (cmpl_data && fbd->cmpl_data) {
+ err = -EBUSY;
+ goto unlock_mbx;
+ }
+
+ /* Record completion location and submit request */
+ if (cmpl_data)
+ fbd->cmpl_data = cmpl_data;
+
+ err = fbnic_mbx_map_msg(fbd, FBNIC_IPC_MBX_TX_IDX, msg,
+ le16_to_cpu(msg->hdr.len) * sizeof(u32), 1);
+
+ /* If msg failed then clear completion data for next caller */
+ if (err && cmpl_data)
+ fbd->cmpl_data = NULL;
+
+unlock_mbx:
+ spin_unlock_irqrestore(&fbd->fw_tx_lock, flags);
+
+ return err;
+}
+
static void fbnic_mbx_process_tx_msgs(struct fbnic_dev *fbd)
{
struct fbnic_fw_mbx *tx_mbx = &fbd->mbx[FBNIC_IPC_MBX_TX_IDX];
@@ -651,6 +683,225 @@ void fbnic_fw_check_heartbeat(struct fbnic_dev *fbd)
dev_warn(fbd->dev, "Failed to send heartbeat message\n");
}
+/**
+ * fbnic_fw_xmit_fw_start_upgrade - Create and transmit a start update message
+ * @fbd: FBNIC device structure
+ * @cmpl_data: Completion data for upgrade process
+ * @id: Component ID
+ * @len: Length of FW update package data
+ *
+ * Return: zero on success, negative value on failure
+ *
+ * Asks the FW to prepare for starting a firmware upgrade
+ */
+int fbnic_fw_xmit_fw_start_upgrade(struct fbnic_dev *fbd,
+ struct fbnic_fw_completion *cmpl_data,
+ unsigned int id, unsigned int len)
+{
+ struct fbnic_tlv_msg *msg;
+ int err;
+
+ if (!len)
+ return -EINVAL;
+
+ msg = fbnic_tlv_msg_alloc(FBNIC_TLV_MSG_ID_FW_START_UPGRADE_REQ);
+ if (!msg)
+ return -ENOMEM;
+
+ err = fbnic_tlv_attr_put_int(msg, FBNIC_FW_START_UPGRADE_SECTION, id);
+ if (err)
+ goto free_message;
+
+ err = fbnic_tlv_attr_put_int(msg, FBNIC_FW_START_UPGRADE_IMAGE_LENGTH,
+ len);
+ if (err)
+ goto free_message;
+
+ err = fbnic_mbx_map_req_w_cmpl(fbd, msg, cmpl_data);
+ if (err)
+ goto free_message;
+
+ return 0;
+
+free_message:
+ free_page((unsigned long)msg);
+ return err;
+}
+
+static const struct fbnic_tlv_index fbnic_fw_start_upgrade_resp_index[] = {
+ FBNIC_TLV_ATTR_S32(FBNIC_FW_START_UPGRADE_ERROR),
+ FBNIC_TLV_ATTR_LAST
+};
+
+static int fbnic_fw_parse_fw_start_upgrade_resp(void *opaque,
+ struct fbnic_tlv_msg **results)
+{
+ struct fbnic_dev *fbd = opaque;
+ struct fbnic_fw_completion *cmpl_data;
+ int err = 0;
+
+ /* Verify we have a completion pointer */
+ cmpl_data = READ_ONCE(fbd->cmpl_data);
+ if (!cmpl_data ||
+ cmpl_data->msg_type != FBNIC_TLV_MSG_ID_FW_WRITE_CHUNK_REQ)
+ return -ENOSPC;
+
+ /* Check for errors */
+ get_signed_result(FBNIC_FW_START_UPGRADE_ERROR, err);
+
+ cmpl_data->result = err;
+ complete(&cmpl_data->done);
+
+ return 0;
+}
+
+static const struct fbnic_tlv_index fbnic_fw_write_chunk_req_index[] = {
+ FBNIC_TLV_ATTR_U32(FBNIC_FW_WRITE_CHUNK_OFFSET),
+ FBNIC_TLV_ATTR_U32(FBNIC_FW_WRITE_CHUNK_LENGTH),
+ FBNIC_TLV_ATTR_LAST
+};
+
+static int fbnic_fw_parse_fw_write_chunk_req(void *opaque,
+ struct fbnic_tlv_msg **results)
+{
+ struct fbnic_dev *fbd = opaque;
+ struct fbnic_fw_completion *cmpl_data;
+ u32 length = 0, offset = 0;
+ struct fbnic_tlv_msg *msg;
+ int err;
+
+ /* Start by attempting to allocate a response to the message */
+ msg = fbnic_tlv_msg_alloc(FBNIC_TLV_MSG_ID_FW_WRITE_CHUNK_RESP);
+ if (!msg)
+ return -ENOMEM;
+
+ /* Verify we have a completion pointer */
+ cmpl_data = READ_ONCE(fbd->cmpl_data);
+ if (!cmpl_data ||
+ cmpl_data->msg_type != FBNIC_TLV_MSG_ID_FW_WRITE_CHUNK_REQ) {
+ err = -ENOSPC;
+ goto msg_err;
+ }
+
+ /* Notify FW if the data link has been severed */
+ if (!cmpl_data->fw_update.data) {
+ err = -ECANCELED;
+ goto msg_err;
+ }
+
+ /* Pull length/offset pair and mark it as complete */
+ get_unsigned_result(FBNIC_FW_WRITE_CHUNK_OFFSET, offset);
+ get_unsigned_result(FBNIC_FW_WRITE_CHUNK_LENGTH, length);
+
+ /* Record offset and length for the response */
+ if (offset) {
+ err = fbnic_tlv_attr_put_int(msg, FBNIC_FW_WRITE_CHUNK_OFFSET,
+ offset);
+ if (err)
+ goto msg_err;
+ }
+
+ err = fbnic_tlv_attr_put_int(msg, FBNIC_FW_WRITE_CHUNK_LENGTH,
+ length);
+ if (err)
+ goto msg_err;
+
+ /* Verify length */
+ if (!length || length > TLV_MAX_DATA) {
+ err = -EINVAL;
+ goto msg_err;
+ }
+
+ /* Verify offset and length are within bounds */
+ if (offset >= cmpl_data->fw_update.size ||
+ offset + length > cmpl_data->fw_update.size) {
+ err = -EFAULT;
+ goto msg_err;
+ }
+
+ /* Add outbound data to message */
+ err = fbnic_tlv_attr_put_value(msg, FBNIC_FW_WRITE_CHUNK_DATA,
+ cmpl_data->fw_update.data + offset,
+ length);
+
+ /* Notify the waiting thread that we processed a message */
+ if (!err)
+ cmpl_data->fw_update.last_offset = offset;
+
+ cmpl_data->result = err;
+ complete(&cmpl_data->done);
+
+msg_err:
+ /* Report error to FW if one occurred */
+ if (err)
+ fbnic_tlv_attr_put_int(msg, FBNIC_FW_WRITE_CHUNK_ERROR, err);
+
+ /* Map and send the response */
+ err = fbnic_mbx_map_tlv_msg(fbd, msg);
+ if (err)
+ free_page((unsigned long)msg);
+
+ return err;
+}
+
+static const struct fbnic_tlv_index fbnic_fw_verify_image_resp_index[] = {
+ FBNIC_TLV_ATTR_S32(FBNIC_FW_VERIFY_IMAGE_ERROR),
+ FBNIC_TLV_ATTR_LAST
+};
+
+static int fbnic_fw_parse_fw_verify_image_resp(void *opaque,
+ struct fbnic_tlv_msg **results)
+{
+ struct fbnic_dev *fbd = opaque;
+ struct fbnic_fw_completion *cmpl_data;
+ int err = 0;
+
+ /* Verify we have a completion pointer */
+ cmpl_data = READ_ONCE(fbd->cmpl_data);
+ if (!cmpl_data ||
+ cmpl_data->msg_type != FBNIC_TLV_MSG_ID_FW_VERIFY_IMAGE_RESP)
+ return -ENOSPC;
+
+ /* Check for errors */
+ get_signed_result(FBNIC_FW_VERIFY_IMAGE_ERROR, err);
+
+ cmpl_data->result = err;
+ complete(&cmpl_data->done);
+
+ return err;
+}
+
+static const struct fbnic_tlv_index fbnic_fw_finish_upgrade_req_index[] = {
+ FBNIC_TLV_ATTR_S32(FBNIC_FW_FINISH_UPGRADE_ERROR),
+ FBNIC_TLV_ATTR_LAST
+};
+
+static int fbnic_fw_parse_fw_finish_upgrade_req(void *opaque,
+ struct fbnic_tlv_msg **results)
+{
+ struct fbnic_dev *fbd = opaque;
+ struct fbnic_fw_completion *cmpl_data;
+ int err = 0;
+
+ /* Verify we have a completion pointer */
+ cmpl_data = READ_ONCE(fbd->cmpl_data);
+ if (!cmpl_data ||
+ cmpl_data->msg_type != FBNIC_TLV_MSG_ID_FW_WRITE_CHUNK_REQ)
+ return -ENOSPC;
+
+ /* Check for errors */
+ get_signed_result(FBNIC_FW_FINISH_UPGRADE_ERROR, err);
+
+ /* Close out update by clearing data pointer */
+ cmpl_data->fw_update.last_offset = cmpl_data->fw_update.size;
+ cmpl_data->fw_update.data = NULL;
+
+ cmpl_data->result = err;
+ complete(&cmpl_data->done);
+
+ return 0;
+}
+
static const struct fbnic_tlv_parser fbnic_fw_tlv_parser[] = {
FBNIC_TLV_PARSER(FW_CAP_RESP, fbnic_fw_cap_resp_index,
fbnic_fw_parse_cap_resp),
@@ -658,6 +909,18 @@ static const struct fbnic_tlv_parser fbnic_fw_tlv_parser[] = {
fbnic_fw_parse_ownership_resp),
FBNIC_TLV_PARSER(HEARTBEAT_RESP, fbnic_heartbeat_resp_index,
fbnic_fw_parse_heartbeat_resp),
+ FBNIC_TLV_PARSER(FW_START_UPGRADE_RESP,
+ fbnic_fw_start_upgrade_resp_index,
+ fbnic_fw_parse_fw_start_upgrade_resp),
+ FBNIC_TLV_PARSER(FW_WRITE_CHUNK_REQ,
+ fbnic_fw_write_chunk_req_index,
+ fbnic_fw_parse_fw_write_chunk_req),
+ FBNIC_TLV_PARSER(FW_VERIFY_IMAGE_RESP,
+ fbnic_fw_verify_image_resp_index,
+ fbnic_fw_parse_fw_verify_image_resp),
+ FBNIC_TLV_PARSER(FW_FINISH_UPGRADE_REQ,
+ fbnic_fw_finish_upgrade_req_index,
+ fbnic_fw_parse_fw_finish_upgrade_req),
FBNIC_TLV_MSG_ERROR
};
diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_fw.h b/drivers/net/ethernet/meta/fbnic/fbnic_fw.h
index 221faf8c6756..a638d73d2da5 100644
--- a/drivers/net/ethernet/meta/fbnic/fbnic_fw.h
+++ b/drivers/net/ethernet/meta/fbnic/fbnic_fw.h
@@ -44,6 +44,19 @@ struct fbnic_fw_cap {
u8 link_fec;
};
+struct fbnic_fw_completion {
+ u32 msg_type;
+ struct completion done;
+ int result;
+ union {
+ struct {
+ u32 size;
+ u32 last_offset;
+ const u8 *data;
+ } fw_update;
+ };
+};
+
void fbnic_mbx_init(struct fbnic_dev *fbd);
void fbnic_mbx_clean(struct fbnic_dev *fbd);
void fbnic_mbx_poll(struct fbnic_dev *fbd);
@@ -52,6 +65,9 @@ void fbnic_mbx_flush_tx(struct fbnic_dev *fbd);
int fbnic_fw_xmit_ownership_msg(struct fbnic_dev *fbd, bool take_ownership);
int fbnic_fw_init_heartbeat(struct fbnic_dev *fbd, bool poll);
void fbnic_fw_check_heartbeat(struct fbnic_dev *fbd);
+int fbnic_fw_xmit_fw_start_upgrade(struct fbnic_dev *fbd,
+ struct fbnic_fw_completion *cmpl_data,
+ unsigned int id, unsigned int len);
#define fbnic_mk_full_fw_ver_str(_rev_id, _delim, _commit, _str, _str_sz) \
do { \
@@ -67,6 +83,15 @@ do { \
#define fbnic_mk_fw_ver_str(_rev_id, _str) \
fbnic_mk_full_fw_ver_str(_rev_id, "", "", _str, sizeof(_str))
+enum {
+ QSPI_SECTION_CMRT = 0,
+ QSPI_SECTION_CONTROL_FW = 1,
+ QSPI_SECTION_UCODE = 2,
+ QSPI_SECTION_OPTION_ROM = 3,
+ QSPI_SECTION_USER = 4,
+ QSPI_SECTION_INVALID,
+};
+
#define FW_HEARTBEAT_PERIOD (10 * HZ)
enum {
@@ -76,6 +101,14 @@ enum {
FBNIC_TLV_MSG_ID_OWNERSHIP_RESP = 0x13,
FBNIC_TLV_MSG_ID_HEARTBEAT_REQ = 0x14,
FBNIC_TLV_MSG_ID_HEARTBEAT_RESP = 0x15,
+ FBNIC_TLV_MSG_ID_FW_START_UPGRADE_REQ = 0x22,
+ FBNIC_TLV_MSG_ID_FW_START_UPGRADE_RESP = 0x23,
+ FBNIC_TLV_MSG_ID_FW_WRITE_CHUNK_REQ = 0x24,
+ FBNIC_TLV_MSG_ID_FW_WRITE_CHUNK_RESP = 0x25,
+ FBNIC_TLV_MSG_ID_FW_VERIFY_IMAGE_REQ = 0x26,
+ FBNIC_TLV_MSG_ID_FW_VERIFY_IMAGE_RESP = 0x27,
+ FBNIC_TLV_MSG_ID_FW_FINISH_UPGRADE_REQ = 0x28,
+ FBNIC_TLV_MSG_ID_FW_FINISH_UPGRADE_RESP = 0x29,
};
#define FBNIC_FW_CAP_RESP_VERSION_MAJOR CSR_GENMASK(31, 24)
@@ -121,4 +154,30 @@ enum {
FBNIC_FW_OWNERSHIP_FLAG = 0x0,
FBNIC_FW_OWNERSHIP_MSG_MAX
};
+
+enum {
+ FBNIC_FW_START_UPGRADE_ERROR = 0x0,
+ FBNIC_FW_START_UPGRADE_SECTION = 0x1,
+ FBNIC_FW_START_UPGRADE_IMAGE_LENGTH = 0x2,
+ FBNIC_FW_START_UPGRADE_MSG_MAX
+};
+
+enum {
+ FBNIC_FW_WRITE_CHUNK_OFFSET = 0x0,
+ FBNIC_FW_WRITE_CHUNK_LENGTH = 0x1,
+ FBNIC_FW_WRITE_CHUNK_DATA = 0x2,
+ FBNIC_FW_WRITE_CHUNK_ERROR = 0x3,
+ FBNIC_FW_WRITE_CHUNK_MSG_MAX
+};
+
+enum {
+ FBNIC_FW_VERIFY_IMAGE_ERROR = 0x0,
+ FBNIC_FW_VERIFY_IMAGE_MSG_MAX
+};
+
+enum {
+ FBNIC_FW_FINISH_UPGRADE_ERROR = 0x0,
+ FBNIC_FW_FINISH_UPGRADE_MSG_MAX
+};
+
#endif /* _FBNIC_FW_H_ */
--
2.43.5