ionic: Add port management commands

The port management commands apply to the physical port
associated with the PCI device, which might be shared among
several logical interfaces.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 88 insertions, 0 deletions

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_main.c b/drivers/net/ethernet/pensando/ionic/ionic_main.c
index 45b83ba20305..d7e62d31bff0 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_main.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_main.c
@@ -303,6 +303,94 @@ int ionic_reset(struct ionic *ionic)
 	return err;
 }
 
+int ionic_port_identify(struct ionic *ionic)
+{
+	struct ionic_identity *ident = &ionic->ident;
+	struct ionic_dev *idev = &ionic->idev;
+	size_t sz;
+	int err;
+
+	mutex_lock(&ionic->dev_cmd_lock);
+
+	ionic_dev_cmd_port_identify(idev);
+	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
+	if (!err) {
+		sz = min(sizeof(ident->port), sizeof(idev->dev_cmd_regs->data));
+		memcpy_fromio(&ident->port, &idev->dev_cmd_regs->data, sz);
+	}
+
+	mutex_unlock(&ionic->dev_cmd_lock);
+
+	return err;
+}
+
+int ionic_port_init(struct ionic *ionic)
+{
+	struct ionic_identity *ident = &ionic->ident;
+	struct ionic_dev *idev = &ionic->idev;
+	size_t sz;
+	int err;
+
+	if (idev->port_info)
+		return 0;
+
+	idev->port_info_sz = ALIGN(sizeof(*idev->port_info), PAGE_SIZE);
+	idev->port_info = dma_alloc_coherent(ionic->dev, idev->port_info_sz,
+					     &idev->port_info_pa,
+					     GFP_KERNEL);
+	if (!idev->port_info) {
+		dev_err(ionic->dev, "Failed to allocate port info, aborting\n");
+		return -ENOMEM;
+	}
+
+	sz = min(sizeof(ident->port.config), sizeof(idev->dev_cmd_regs->data));
+
+	mutex_lock(&ionic->dev_cmd_lock);
+
+	memcpy_toio(&idev->dev_cmd_regs->data, &ident->port.config, sz);
+	ionic_dev_cmd_port_init(idev);
+	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
+
+	ionic_dev_cmd_port_state(&ionic->idev, IONIC_PORT_ADMIN_STATE_UP);
+	(void)ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
+
+	mutex_unlock(&ionic->dev_cmd_lock);
+	if (err) {
+		dev_err(ionic->dev, "Failed to init port\n");
+		dma_free_coherent(ionic->dev, idev->port_info_sz,
+				  idev->port_info, idev->port_info_pa);
+		idev->port_info = NULL;
+		idev->port_info_pa = 0;
+	}
+
+	return err;
+}
+
+int ionic_port_reset(struct ionic *ionic)
+{
+	struct ionic_dev *idev = &ionic->idev;
+	int err;
+
+	if (!idev->port_info)
+		return 0;
+
+	mutex_lock(&ionic->dev_cmd_lock);
+	ionic_dev_cmd_port_reset(idev);
+	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
+	mutex_unlock(&ionic->dev_cmd_lock);
+
+	dma_free_coherent(ionic->dev, idev->port_info_sz,
+			  idev->port_info, idev->port_info_pa);
+
+	idev->port_info = NULL;
+	idev->port_info_pa = 0;
+
+	if (err)
+		dev_err(ionic->dev, "Failed to reset port\n");
+
+	return err;
+}
+
 static int __init ionic_init_module(void)
 {
 	pr_info("%s %s, ver %s\n",