ionic: new ionic device identity level and VF start control

A new ionic dev_cmd is added to the interface in ionic_if.h,
with a new capabilities field in the ionic device identity to
signal its availability in the FW.  The identity level code is
incremented to '2' to show support for this new capabilities
bitfield.

If the driver has indicated with the new identity level that
it has the VF_CTRL command, newer FW will wait for the start
command before starting the VFs after a FW update or crash
recovery.

This patch updates the driver to make use of the new VF start
control in fw_up path to be sure that the PF has set the user
attributes on the VF before the FW allows the VFs to restart.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/pensando/ionic/ionic_dev.c

@@ -481,6 +481,20 @@ int ionic_dev_cmd_vf_getattr(struct ionic *ionic, int vf, u8 attr,
 	return err;
 }
 
+void ionic_vf_start(struct ionic *ionic)
+{
+	union ionic_dev_cmd cmd = {
+		.vf_ctrl.opcode = IONIC_CMD_VF_CTRL,
+		.vf_ctrl.ctrl_opcode = IONIC_VF_CTRL_START_ALL,
+	};
+
+	if (!(ionic->ident.dev.capabilities & cpu_to_le64(IONIC_DEV_CAP_VF_CTRL)))
+		return;
+
+	ionic_dev_cmd_go(&ionic->idev, &cmd);
+	ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
+}
+
 /* LIF commands */
 void ionic_dev_cmd_queue_identify(struct ionic_dev *idev,
 				  u16 lif_type, u8 qtype, u8 qver)

drivers/net/ethernet/pensando/ionic/ionic_dev.h

@@ -124,6 +124,8 @@ static_assert(sizeof(struct ionic_vf_setattr_cmd) == 64);
 static_assert(sizeof(struct ionic_vf_setattr_comp) == 16);
 static_assert(sizeof(struct ionic_vf_getattr_cmd) == 64);
 static_assert(sizeof(struct ionic_vf_getattr_comp) == 16);
+static_assert(sizeof(struct ionic_vf_ctrl_cmd) == 64);
+static_assert(sizeof(struct ionic_vf_ctrl_comp) == 16);
 #endif /* __CHECKER__ */
 
 struct ionic_devinfo {
@@ -324,6 +326,7 @@ int ionic_dev_cmd_vf_getattr(struct ionic *ionic, int vf, u8 attr,
 			     struct ionic_vf_getattr_comp *comp);
 void ionic_dev_cmd_queue_identify(struct ionic_dev *idev,
 				  u16 lif_type, u8 qtype, u8 qver);
+void ionic_vf_start(struct ionic *ionic);
 void ionic_dev_cmd_lif_identify(struct ionic_dev *idev, u8 type, u8 ver);
 void ionic_dev_cmd_lif_init(struct ionic_dev *idev, u16 lif_index,
 			    dma_addr_t addr);

drivers/net/ethernet/pensando/ionic/ionic_if.h

@@ -8,7 +8,7 @@
 #define IONIC_DEV_INFO_VERSION			1
 #define IONIC_IFNAMSIZ				16
 
-/**
+/*
  * enum ionic_cmd_opcode - Device commands
  */
 enum ionic_cmd_opcode {
@@ -54,6 +54,7 @@ enum ionic_cmd_opcode {
 	/* SR/IOV commands */
 	IONIC_CMD_VF_GETATTR			= 60,
 	IONIC_CMD_VF_SETATTR			= 61,
+	IONIC_CMD_VF_CTRL			= 62,
 
 	/* QoS commands */
 	IONIC_CMD_QOS_CLASS_IDENTIFY		= 240,
@@ -200,6 +201,7 @@ struct ionic_dev_reset_comp {
 };
 
 #define IONIC_IDENTITY_VERSION_1	1
+#define IONIC_DEV_IDENTITY_VERSION_2	2
 
 /**
  * struct ionic_dev_identify_cmd - Driver/device identify command
@@ -253,6 +255,14 @@ union ionic_drv_identity {
 	__le32 words[478];
 };
 
+/**
+ * enum ionic_dev_capability - Device capabilities
+ * @IONIC_DEV_CAP_VF_CTRL:     Device supports VF ctrl operations
+ */
+enum ionic_dev_capability {
+	IONIC_DEV_CAP_VF_CTRL        = BIT(0),
+};
+
 /**
  * union ionic_dev_identity - device identity information
  * @version:          Version of device identify
@@ -273,6 +283,7 @@ union ionic_drv_identity {
  * @hwstamp_mask:     Bitmask for subtraction of hardware tick values.
  * @hwstamp_mult:     Hardware tick to nanosecond multiplier.
  * @hwstamp_shift:    Hardware tick to nanosecond divisor (power of two).
+ * @capabilities:     Device capabilities
  */
 union ionic_dev_identity {
 	struct {
@@ -290,6 +301,7 @@ union ionic_dev_identity {
 		__le64 hwstamp_mask;
 		__le32 hwstamp_mult;
 		__le32 hwstamp_shift;
+		__le64 capabilities;
 	};
 	__le32 words[478];
 };
@@ -2044,6 +2056,35 @@ struct ionic_vf_getattr_comp {
 	u8     color;
 };
 
+enum ionic_vf_ctrl_opcode {
+	IONIC_VF_CTRL_START_ALL	= 0,
+	IONIC_VF_CTRL_START	= 1,
+};
+
+/**
+ * struct ionic_vf_ctrl_cmd - VF control command
+ * @opcode:         Opcode for the command
+ * @vf_index:       VF Index. It is unused if op START_ALL is used.
+ * @ctrl_opcode:    VF control operation type
+ */
+struct ionic_vf_ctrl_cmd {
+	u8	opcode;
+	u8	ctrl_opcode;
+	__le16	vf_index;
+	/* private: */
+	u8	rsvd1[60];
+};
+
+/**
+ * struct ionic_vf_ctrl_comp - VF_CTRL command completion.
+ * @status:     Status of the command (enum ionic_status_code)
+ */
+struct ionic_vf_ctrl_comp {
+	u8	status;
+	/* private: */
+	u8      rsvd[15];
+};
+
 /**
  * struct ionic_qos_identify_cmd - QoS identify command
  * @opcode:  opcode
@@ -2865,6 +2906,7 @@ union ionic_dev_cmd {
 
 	struct ionic_vf_setattr_cmd vf_setattr;
 	struct ionic_vf_getattr_cmd vf_getattr;
+	struct ionic_vf_ctrl_cmd vf_ctrl;
 
 	struct ionic_lif_identify_cmd lif_identify;
 	struct ionic_lif_init_cmd lif_init;
@@ -2903,6 +2945,7 @@ union ionic_dev_cmd_comp {
 
 	struct ionic_vf_setattr_comp vf_setattr;
 	struct ionic_vf_getattr_comp vf_getattr;
+	struct ionic_vf_ctrl_comp vf_ctrl;
 
 	struct ionic_lif_identify_comp lif_identify;
 	struct ionic_lif_init_comp lif_init;

drivers/net/ethernet/pensando/ionic/ionic_lif.c

@@ -2629,6 +2629,8 @@ static void ionic_vf_attr_replay(struct ionic_lif *lif)
 	}
 
 	up_read(&ionic->vf_op_lock);
+
+	ionic_vf_start(ionic);
 }
 
 static const struct net_device_ops ionic_netdev_ops = {

drivers/net/ethernet/pensando/ionic/ionic_main.c

@@ -533,7 +533,7 @@ int ionic_identify(struct ionic *ionic)
 	sz = min(sizeof(ident->drv), sizeof(idev->dev_cmd_regs->data));
 	memcpy_toio(&idev->dev_cmd_regs->data, &ident->drv, sz);
 
-	ionic_dev_cmd_identify(idev, IONIC_IDENTITY_VERSION_1);
+	ionic_dev_cmd_identify(idev, IONIC_DEV_IDENTITY_VERSION_2);
 	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 	if (!err) {
 		sz = min(sizeof(ident->dev), sizeof(idev->dev_cmd_regs->data));