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Date: Sun, 6 Nov 2022 23:25:15 -0800
From: Veerasenareddy Burru <vburru@...vell.com>
To: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<lironh@...vell.com>, <aayarekar@...vell.com>,
<sedara@...vell.com>, <sburla@...vell.com>
CC: <linux-doc@...r.kernel.org>,
Veerasenareddy Burru <vburru@...vell.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Subject: [PATCH net-next 1/9] octeon_ep: wait for firmware ready
Make driver initialize the device only after firmware is ready
- add async device setup routine.
- poll firmware status register.
- once firmware is ready, call async device setup routine.
Signed-off-by: Veerasenareddy Burru <vburru@...vell.com>
Signed-off-by: Abhijit Ayarekar <aayarekar@...vell.com>
---
.../ethernet/marvell/octeon_ep/octep_main.c | 156 +++++++++++++-----
.../ethernet/marvell/octeon_ep/octep_main.h | 15 ++
2 files changed, 133 insertions(+), 38 deletions(-)
diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
index 1cbfa800a8af..488159217030 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
@@ -867,6 +867,14 @@ static const struct net_device_ops octep_netdev_ops = {
.ndo_change_mtu = octep_change_mtu,
};
+/* Cancel all tasks except hb task */
+static void cancel_all_tasks(struct octep_device *oct)
+{
+ cancel_work_sync(&oct->tx_timeout_task);
+ cancel_work_sync(&oct->ctrl_mbox_task);
+ octep_ctrl_mbox_uninit(&oct->ctrl_mbox);
+}
+
/**
* octep_ctrl_mbox_task - work queue task to handle ctrl mbox messages.
*
@@ -979,6 +987,9 @@ int octep_device_setup(struct octep_device *oct)
ctrl_mbox->f2hq.elem_sz,
ctrl_mbox->f2hq.elem_cnt);
+ INIT_WORK(&oct->tx_timeout_task, octep_tx_timeout_task);
+ INIT_WORK(&oct->ctrl_mbox_task, octep_ctrl_mbox_task);
+
return 0;
unsupported_dev:
@@ -1003,7 +1014,7 @@ static void octep_device_cleanup(struct octep_device *oct)
oct->mbox[i] = NULL;
}
- octep_ctrl_mbox_uninit(&oct->ctrl_mbox);
+ cancel_all_tasks(oct);
oct->hw_ops.soft_reset(oct);
for (i = 0; i < OCTEP_MMIO_REGIONS; i++) {
@@ -1015,6 +1026,92 @@ static void octep_device_cleanup(struct octep_device *oct)
oct->conf = NULL;
}
+static u8 get_fw_ready_status(struct octep_device *oct)
+{
+ u32 pos = 0;
+ u16 vsec_id;
+ u8 status = 0;
+
+ while ((pos = pci_find_next_ext_capability(oct->pdev, pos,
+ PCI_EXT_CAP_ID_VNDR))) {
+ pci_read_config_word(oct->pdev, pos + 4, &vsec_id);
+#define FW_STATUS_VSEC_ID 0xA3
+ if (vsec_id == FW_STATUS_VSEC_ID) {
+ pci_read_config_byte(oct->pdev, (pos + 8), &status);
+ dev_info(&oct->pdev->dev, "Firmware ready %u\n",
+ status);
+ return status;
+ }
+ }
+ return 0;
+}
+
+/**
+ * octep_dev_setup_task - work queue task to setup octep device.
+ *
+ * @work: pointer to dev setup work_struct
+ *
+ * Wait for firmware to be ready, then continue with device setup.
+ * Check for module exit while waiting for firmware.
+ *
+ **/
+static void octep_dev_setup_task(struct work_struct *work)
+{
+ struct octep_device *oct = container_of(work, struct octep_device,
+ dev_setup_task);
+ struct net_device *netdev = oct->netdev;
+ u8 status;
+ int err;
+
+ atomic_set(&oct->status, OCTEP_DEV_STATUS_WAIT_FOR_FW);
+ while (true) {
+ status = get_fw_ready_status(oct);
+#define FW_STATUS_READY 1
+ if (status == FW_STATUS_READY)
+ break;
+
+ schedule_timeout_interruptible(HZ * 1);
+
+ if (atomic_read(&oct->status) >= OCTEP_DEV_STATUS_READY) {
+ dev_info(&oct->pdev->dev,
+ "Stopping firmware ready work.\n");
+ return;
+ }
+ }
+
+ /* Do not free resources on failure. driver unload will
+ * lead to freeing resources.
+ */
+ atomic_set(&oct->status, OCTEP_DEV_STATUS_INIT);
+ err = octep_device_setup(oct);
+ if (err) {
+ dev_err(&oct->pdev->dev, "Device setup failed\n");
+ atomic_set(&oct->status, OCTEP_DEV_STATUS_ALLOC);
+ return;
+ }
+
+ netdev->netdev_ops = &octep_netdev_ops;
+ octep_set_ethtool_ops(netdev);
+ netif_carrier_off(netdev);
+
+ netdev->hw_features = NETIF_F_SG;
+ netdev->features |= netdev->hw_features;
+ netdev->min_mtu = OCTEP_MIN_MTU;
+ netdev->max_mtu = OCTEP_MAX_MTU;
+ netdev->mtu = OCTEP_DEFAULT_MTU;
+
+ octep_get_mac_addr(oct, oct->mac_addr);
+ eth_hw_addr_set(netdev, oct->mac_addr);
+
+ err = register_netdev(netdev);
+ if (err) {
+ dev_err(&oct->pdev->dev, "Failed to register netdev\n");
+ atomic_set(&oct->status, OCTEP_DEV_STATUS_INIT);
+ return;
+ }
+ atomic_set(&oct->status, OCTEP_DEV_STATUS_READY);
+}
+
/**
* octep_probe() - Octeon PCI device probe handler.
*
@@ -1066,39 +1163,13 @@ static int octep_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
octep_dev->dev = &pdev->dev;
pci_set_drvdata(pdev, octep_dev);
- err = octep_device_setup(octep_dev);
- if (err) {
- dev_err(&pdev->dev, "Device setup failed\n");
- goto err_octep_config;
- }
- INIT_WORK(&octep_dev->tx_timeout_task, octep_tx_timeout_task);
- INIT_WORK(&octep_dev->ctrl_mbox_task, octep_ctrl_mbox_task);
+ atomic_set(&octep_dev->status, OCTEP_DEV_STATUS_ALLOC);
+ INIT_WORK(&octep_dev->dev_setup_task, octep_dev_setup_task);
+ queue_work(octep_wq, &octep_dev->dev_setup_task);
+ dev_info(&pdev->dev, "Device setup task queued\n");
- netdev->netdev_ops = &octep_netdev_ops;
- octep_set_ethtool_ops(netdev);
- netif_carrier_off(netdev);
-
- netdev->hw_features = NETIF_F_SG;
- netdev->features |= netdev->hw_features;
- netdev->min_mtu = OCTEP_MIN_MTU;
- netdev->max_mtu = OCTEP_MAX_MTU;
- netdev->mtu = OCTEP_DEFAULT_MTU;
-
- octep_get_mac_addr(octep_dev, octep_dev->mac_addr);
- eth_hw_addr_set(netdev, octep_dev->mac_addr);
-
- err = register_netdev(netdev);
- if (err) {
- dev_err(&pdev->dev, "Failed to register netdev\n");
- goto register_dev_err;
- }
- dev_info(&pdev->dev, "Device probe successful\n");
return 0;
-register_dev_err:
- octep_device_cleanup(octep_dev);
-err_octep_config:
- free_netdev(netdev);
err_alloc_netdev:
pci_disable_pcie_error_reporting(pdev);
pci_release_mem_regions(pdev);
@@ -1119,20 +1190,29 @@ static int octep_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
static void octep_remove(struct pci_dev *pdev)
{
struct octep_device *oct = pci_get_drvdata(pdev);
- struct net_device *netdev;
+ int status;
if (!oct)
return;
- cancel_work_sync(&oct->tx_timeout_task);
- cancel_work_sync(&oct->ctrl_mbox_task);
- netdev = oct->netdev;
- if (netdev->reg_state == NETREG_REGISTERED)
- unregister_netdev(netdev);
+ dev_info(&pdev->dev, "Removing device.\n");
+ status = atomic_read(&oct->status);
+ if (status <= OCTEP_DEV_STATUS_ALLOC)
+ goto free_resources;
+
+ atomic_set(&oct->status, OCTEP_DEV_STATUS_UNINIT);
+ if (status == OCTEP_DEV_STATUS_WAIT_FOR_FW) {
+ cancel_work_sync(&oct->dev_setup_task);
+ goto free_resources;
+ }
+ if (oct->netdev->reg_state == NETREG_REGISTERED)
+ unregister_netdev(oct->netdev);
octep_device_cleanup(oct);
+
+free_resources:
pci_release_mem_regions(pdev);
- free_netdev(netdev);
+ free_netdev(oct->netdev);
pci_disable_pcie_error_reporting(pdev);
pci_disable_device(pdev);
}
diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.h b/drivers/net/ethernet/marvell/octeon_ep/octep_main.h
index 123ffc13754d..45226282bf21 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.h
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.h
@@ -192,6 +192,16 @@ struct octep_iface_link_info {
u8 oper_up;
};
+/* Device status */
+enum octep_dev_status {
+ OCTEP_DEV_STATUS_INVALID,
+ OCTEP_DEV_STATUS_ALLOC,
+ OCTEP_DEV_STATUS_WAIT_FOR_FW,
+ OCTEP_DEV_STATUS_INIT,
+ OCTEP_DEV_STATUS_READY,
+ OCTEP_DEV_STATUS_UNINIT
+};
+
/* The Octeon device specific private data structure.
* Each Octeon device has this structure to represent all its components.
*/
@@ -271,6 +281,11 @@ struct octep_device {
/* Work entry to handle ctrl mbox interrupt */
struct work_struct ctrl_mbox_task;
+ /* Work entry to handle device setup */
+ struct work_struct dev_setup_task;
+
+ /* Device status */
+ atomic_t status;
};
static inline u16 OCTEP_MAJOR_REV(struct octep_device *oct)
--
2.36.0
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