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From 2de005e9ac399f7064968a2611f266dc86a96700 Mon Sep 17 00:00:00 2001
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From: Laszlo Ersek <lersek@redhat.com>
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Date: Fri, 24 Jul 2020 19:15:28 +0200
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Subject: [PATCH] [efi] perform cable detection at NII initialization on HPE
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557SFP+
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Commit c0b61bad99ba ("[efi] Work around bugs in Emulex NII driver",
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2015-08-17) added PXE_OPFLAGS_INITIALIZE_DETECT_CABLE to nii_open() for
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working around Emulex NII driver bugs.
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That broke some Mellanox drivers, so commit 6324227dcaa8 ("[efi] Skip
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cable detection at initialisation where possible", 2017-03-19) predicated
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PXE_OPFLAGS_INITIALIZE_DETECT_CABLE on the NII driver's *inability* to
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report link status.
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This in turn breaks the NII driver on (some?) HPE 557SFP+ cards, as those
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drivers are capable of reporting link status, but they still need cable
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detection.
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So check for this card (through PCI vendor / device / subsys vendor /
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subsys device identifiers), and opt for cable detection regardless of link
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status reporting.
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1740827
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Signed-off-by: Laszlo Ersek <lersek@redhat.com>
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---
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src/drivers/net/efi/nii.c | 43 ++++++++++++++++++++++++++++++++++++---
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1 file changed, 40 insertions(+), 3 deletions(-)
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diff --git a/src/drivers/net/efi/nii.c b/src/drivers/net/efi/nii.c
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index 2d87e0c63f14..0cf065e0818f 100644
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--- a/src/drivers/net/efi/nii.c
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+++ b/src/drivers/net/efi/nii.c
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@@ -193,6 +193,9 @@ struct nii_nic {
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/** Mapping list */
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struct list_head mappings;
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+
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+ /** quirk needed for HPE 557SFP+ */
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+ int quirk_hpe557sfpp;
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};
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/** Maximum number of received packets per poll */
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@@ -219,6 +222,7 @@ static int nii_pci_open ( struct nii_nic *nii ) {
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int bar;
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EFI_STATUS efirc;
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int rc;
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+ uint16_t vid, did, subsys_vid, subsys_did;
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/* Locate PCI I/O protocol */
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if ( ( rc = efi_locate_device ( device, &efi_pci_io_protocol_guid,
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@@ -255,7 +259,7 @@ static int nii_pci_open ( struct nii_nic *nii ) {
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rc = -EEFI ( efirc );
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DBGC ( nii, "NII %s could not get BAR %d attributes: "
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"%s\n", nii->dev.name, bar, strerror ( rc ) );
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- goto err_get_bar_attributes;
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+ goto err_pci;
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}
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if ( desc.acpi->ResType == ACPI_ADDRESS_SPACE_TYPE_MEM ) {
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nii->mem_bar = bar;
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@@ -276,9 +280,36 @@ static int nii_pci_open ( struct nii_nic *nii ) {
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DBGC ( nii, "no I/O BAR\n" );
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}
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+ /* Check if HPE 557SFP+ quirk is needed */
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+ if ( ( efirc = nii->pci_io->Pci.Read ( nii->pci_io,
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+ EfiPciIoWidthUint16,
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+ PCI_VENDOR_ID, 1,
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+ &vid ) ) != 0 ||
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+ ( efirc = nii->pci_io->Pci.Read ( nii->pci_io,
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+ EfiPciIoWidthUint16,
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+ PCI_DEVICE_ID, 1,
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+ &did ) ) != 0 ||
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+ ( efirc = nii->pci_io->Pci.Read ( nii->pci_io,
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+ EfiPciIoWidthUint16,
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+ PCI_SUBSYSTEM_VENDOR_ID, 1,
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+ &subsys_vid ) ) != 0 ||
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+ ( efirc = nii->pci_io->Pci.Read ( nii->pci_io,
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+ EfiPciIoWidthUint16,
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+ PCI_SUBSYSTEM_ID, 1,
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+ &subsys_did ) ) != 0 ) {
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+ rc = -EEFI ( efirc );
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+ DBGC ( nii, "NII %s could not read PCI config space: %s\n",
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+ nii->dev.name, strerror ( rc ) );
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+ goto err_pci;
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+ }
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+
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+ nii->quirk_hpe557sfpp = ( vid == 0x10df &&
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+ did == 0x0720 &&
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+ subsys_vid == 0x103c &&
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+ subsys_did == 0x803f );
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return 0;
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- err_get_bar_attributes:
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+ err_pci:
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bs->CloseProtocol ( pci_device, &efi_pci_io_protocol_guid,
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efi_image_handle, device );
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err_open:
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@@ -1144,8 +1175,14 @@ static int nii_open ( struct net_device *netdev ) {
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* cable detection at this point if any only if the driver is
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* not capable of reporting link status changes at runtime via
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* PXE_OPCODE_GET_STATUS.
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+ *
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+ * HPE 557SFP+ seems to break with
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+ * PXE_OPFLAGS_INITIALIZE_DO_NOT_DETECT_CABLE, but works with
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+ * PXE_OPFLAGS_INITIALIZE_DETECT_CABLE, so ignore link status reporting
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+ * for that NIC, and always request cable detection.
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*/
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- flags = ( nii->media ? PXE_OPFLAGS_INITIALIZE_DO_NOT_DETECT_CABLE
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+ flags = ( ( ! nii->quirk_hpe557sfpp ) && nii->media
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+ ? PXE_OPFLAGS_INITIALIZE_DO_NOT_DETECT_CABLE
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: PXE_OPFLAGS_INITIALIZE_DETECT_CABLE );
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if ( ( rc = nii_initialise_flags ( nii, flags ) ) != 0 )
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goto err_initialise;
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base-commit: b76052335788d0ad2c4b0bded116c3b02dd4bbc2
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--
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2.19.1.3.g30247aa5d201
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