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octeon_ep: defer probe if firmware not ready

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Defer probe if firmware is not ready for device usage.

Signed-off-by: Veerasenareddy Burru <vburru@marvell.com>
Signed-off-by: Abhijit Ayarekar <aayarekar@marvell.com>
Signed-off-by: Satananda Burla <sburla@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Veerasenareddy Burru 2023-03-24 10:46:56 -07:00 committed by David S. Miller
parent fbf8ba5666
commit 10c073e404
1 changed files with 26 additions and 0 deletions
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26
drivers/net/ethernet/marvell/octeon_ep/octep_main.c
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@ -1016,6 +1016,26 @@ static void octep_device_cleanup(struct octep_device *oct)
oct->conf = NULL;
}
static bool get_fw_ready_status(struct pci_dev *pdev)
{
u32 pos = 0;
u16 vsec_id;
u8 status;
while ((pos = pci_find_next_ext_capability(pdev, pos,
PCI_EXT_CAP_ID_VNDR))) {
pci_read_config_word(pdev, pos + 4, &vsec_id);
#define FW_STATUS_VSEC_ID 0xA3
if (vsec_id != FW_STATUS_VSEC_ID)
continue;
pci_read_config_byte(pdev, (pos + 8), &status);
dev_info(&pdev->dev, "Firmware ready status = %u\n", status);
return status;
}
return false;
}
/**
* octep_probe() - Octeon PCI device probe handler.
*
@ -1051,6 +1071,12 @@ static int octep_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
pci_set_master(pdev);
if (!get_fw_ready_status(pdev)) {
dev_notice(&pdev->dev, "Firmware not ready; defer probe.\n");
err = -EPROBE_DEFER;
goto err_alloc_netdev;
}
netdev = alloc_etherdev_mq(sizeof(struct octep_device),
OCTEP_MAX_QUEUES);
if (!netdev) {