RDMA/bnxt_re: Add support for query firmware version

The device now reports firmware version thus, removing
the hard coded values of the FW version string and
redundant fw_rev hook from sysfs. Adding code to query
firmware version from underlying device and report it
through the kernel verb to get firmware version string.

Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Devesh Sharma <devesh.sharma@broadcom.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/bnxt_re/ib_verbs.c

@@ -141,8 +141,9 @@ int bnxt_re_query_device(struct ib_device *ibdev,
 	struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
 
 	memset(ib_attr, 0, sizeof(*ib_attr));
-
-	ib_attr->fw_ver = (u64)(unsigned long)(dev_attr->fw_ver);
+	memcpy(&ib_attr->fw_ver, dev_attr->fw_ver,
+	       min(sizeof(dev_attr->fw_ver),
+		   sizeof(ib_attr->fw_ver)));
 	bnxt_qplib_get_guid(rdev->netdev->dev_addr,
 			    (u8 *)&ib_attr->sys_image_guid);
 	ib_attr->max_mr_size = BNXT_RE_MAX_MR_SIZE;
@@ -281,6 +282,15 @@ int bnxt_re_get_port_immutable(struct ib_device *ibdev, u8 port_num,
 	return 0;
 }
 
+void bnxt_re_query_fw_str(struct ib_device *ibdev, char *str)
+{
+	struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
+
+	snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d.%d",
+		 rdev->dev_attr.fw_ver[0], rdev->dev_attr.fw_ver[1],
+		 rdev->dev_attr.fw_ver[2], rdev->dev_attr.fw_ver[3]);
+}
+
 int bnxt_re_query_pkey(struct ib_device *ibdev, u8 port_num,
 		       u16 index, u16 *pkey)
 {

drivers/infiniband/hw/bnxt_re/ib_verbs.h

@@ -143,6 +143,7 @@ int bnxt_re_query_port(struct ib_device *ibdev, u8 port_num,
 		       struct ib_port_attr *port_attr);
 int bnxt_re_get_port_immutable(struct ib_device *ibdev, u8 port_num,
 			       struct ib_port_immutable *immutable);
+void bnxt_re_query_fw_str(struct ib_device *ibdev, char *str);
 int bnxt_re_query_pkey(struct ib_device *ibdev, u8 port_num,
 		       u16 index, u16 *pkey);
 int bnxt_re_del_gid(struct ib_device *ibdev, u8 port_num,

drivers/infiniband/hw/bnxt_re/main.c

@@ -572,6 +572,7 @@ static int bnxt_re_register_ib(struct bnxt_re_dev *rdev)
 
 	ibdev->query_port		= bnxt_re_query_port;
 	ibdev->get_port_immutable	= bnxt_re_get_port_immutable;
+	ibdev->get_dev_fw_str           = bnxt_re_query_fw_str;
 	ibdev->query_pkey		= bnxt_re_query_pkey;
 	ibdev->query_gid		= bnxt_re_query_gid;
 	ibdev->get_netdev		= bnxt_re_get_netdev;
@@ -623,14 +624,6 @@ static ssize_t show_rev(struct device *device, struct device_attribute *attr,
 	return scnprintf(buf, PAGE_SIZE, "0x%x\n", rdev->en_dev->pdev->vendor);
 }
 
-static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
-			   char *buf)
-{
-	struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
-
-	return scnprintf(buf, PAGE_SIZE, "%s\n", rdev->dev_attr.fw_ver);
-}
-
 static ssize_t show_hca(struct device *device, struct device_attribute *attr,
 			char *buf)
 {
@@ -640,12 +633,10 @@ static ssize_t show_hca(struct device *device, struct device_attribute *attr,
 }
 
 static DEVICE_ATTR(hw_rev, 0444, show_rev, NULL);
-static DEVICE_ATTR(fw_rev, 0444, show_fw_ver, NULL);
 static DEVICE_ATTR(hca_type, 0444, show_hca, NULL);
 
 static struct device_attribute *bnxt_re_attributes[] = {
 	&dev_attr_hw_rev,
-	&dev_attr_fw_rev,
 	&dev_attr_hca_type
 };
 

drivers/infiniband/hw/bnxt_re/qplib_rcfw.c

@@ -93,7 +93,8 @@ static int __send_message(struct bnxt_qplib_rcfw *rcfw, struct cmdq_base *req,
 	opcode = req->opcode;
 	if (!test_bit(FIRMWARE_INITIALIZED_FLAG, &rcfw->flags) &&
 	    (opcode != CMDQ_BASE_OPCODE_QUERY_FUNC &&
-	     opcode != CMDQ_BASE_OPCODE_INITIALIZE_FW)) {
+	     opcode != CMDQ_BASE_OPCODE_INITIALIZE_FW &&
+	     opcode != CMDQ_BASE_OPCODE_QUERY_VERSION)) {
 		dev_err(&rcfw->pdev->dev,
 			"QPLIB: RCFW not initialized, reject opcode 0x%x",
 			opcode);

drivers/infiniband/hw/bnxt_re/qplib_sp.c

@@ -64,6 +64,26 @@ static bool bnxt_qplib_is_atomic_cap(struct bnxt_qplib_rcfw *rcfw)
 	return !!(pcie_ctl2 & PCI_EXP_DEVCTL2_ATOMIC_REQ);
 }
 
+static void bnxt_qplib_query_version(struct bnxt_qplib_rcfw *rcfw,
+				     char *fw_ver)
+{
+	struct cmdq_query_version req;
+	struct creq_query_version_resp resp;
+	u16 cmd_flags = 0;
+	int rc = 0;
+
+	RCFW_CMD_PREP(req, QUERY_VERSION, cmd_flags);
+
+	rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req,
+					  (void *)&resp, NULL, 0);
+	if (rc)
+		return;
+	fw_ver[0] = resp.fw_maj;
+	fw_ver[1] = resp.fw_minor;
+	fw_ver[2] = resp.fw_bld;
+	fw_ver[3] = resp.fw_rsvd;
+}
+
 int bnxt_qplib_get_dev_attr(struct bnxt_qplib_rcfw *rcfw,
 			    struct bnxt_qplib_dev_attr *attr, bool vf)
 {
@@ -134,7 +154,7 @@ int bnxt_qplib_get_dev_attr(struct bnxt_qplib_rcfw *rcfw,
 	attr->l2_db_size = (sb->l2_db_space_size + 1) * PAGE_SIZE;
 	attr->max_sgid = le32_to_cpu(sb->max_gid);
 
-	strlcpy(attr->fw_ver, "20.6.28.0", sizeof(attr->fw_ver));
+	bnxt_qplib_query_version(rcfw, attr->fw_ver);
 
 	for (i = 0; i < MAX_TQM_ALLOC_REQ / 4; i++) {
 		temp = le32_to_cpu(sb->tqm_alloc_reqs[i]);

drivers/infiniband/hw/bnxt_re/qplib_sp.h

@@ -45,7 +45,8 @@
 #define PCI_EXP_DEVCTL2_ATOMIC_REQ      0x0040
 
 struct bnxt_qplib_dev_attr {
-	char				fw_ver[32];
+#define FW_VER_ARR_LEN			4
+	u8				fw_ver[FW_VER_ARR_LEN];
 	u16				max_sgid;
 	u16				max_mrw;
 	u32				max_qp;