On Tue, Apr 06, 2021 at 04:23:21PM -0700, Dexuan Cui wrote:
> Add a VF driver for Microsoft Azure Network Adapter (MANA) that will be
> available in the future.
>
> Co-developed-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
> Signed-off-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
> Signed-off-by: Dexuan Cui <decui@xxxxxxxxxxxxx>
> ---
> MAINTAINERS | 4 +-
> drivers/net/ethernet/Kconfig | 1 +
> drivers/net/ethernet/Makefile | 1 +
> drivers/net/ethernet/microsoft/Kconfig | 29 +
> drivers/net/ethernet/microsoft/Makefile | 5 +
> drivers/net/ethernet/microsoft/mana/Makefile | 6 +
> drivers/net/ethernet/microsoft/mana/gdma.h | 731 +++++++
> .../net/ethernet/microsoft/mana/gdma_main.c | 1500 +++++++++++++
> .../net/ethernet/microsoft/mana/hw_channel.c | 851 ++++++++
> .../net/ethernet/microsoft/mana/hw_channel.h | 181 ++
> drivers/net/ethernet/microsoft/mana/mana.h | 529 +++++
> drivers/net/ethernet/microsoft/mana/mana_en.c | 1861 +++++++++++++++++
> .../ethernet/microsoft/mana/mana_ethtool.c | 276 +++
> .../net/ethernet/microsoft/mana/shm_channel.c | 290 +++
> .../net/ethernet/microsoft/mana/shm_channel.h | 19 +
> 15 files changed, 6283 insertions(+), 1 deletion(-)
> create mode 100644 drivers/net/ethernet/microsoft/Kconfig
> create mode 100644 drivers/net/ethernet/microsoft/Makefile
> create mode 100644 drivers/net/ethernet/microsoft/mana/Makefile
> create mode 100644 drivers/net/ethernet/microsoft/mana/gdma.h
> create mode 100644 drivers/net/ethernet/microsoft/mana/gdma_main.c
> create mode 100644 drivers/net/ethernet/microsoft/mana/hw_channel.c
> create mode 100644 drivers/net/ethernet/microsoft/mana/hw_channel.h
> create mode 100644 drivers/net/ethernet/microsoft/mana/mana.h
> create mode 100644 drivers/net/ethernet/microsoft/mana/mana_en.c
> create mode 100644 drivers/net/ethernet/microsoft/mana/mana_ethtool.c
> create mode 100644 drivers/net/ethernet/microsoft/mana/shm_channel.c
> create mode 100644 drivers/net/ethernet/microsoft/mana/shm_channel.h
<...>
> +int gdma_verify_vf_version(struct pci_dev *pdev)
> +{
> + struct gdma_context *gc = pci_get_drvdata(pdev);
> + struct gdma_verify_ver_req req = { 0 };
> + struct gdma_verify_ver_resp resp = { 0 };
> + int err;
> +
> + gdma_init_req_hdr(&req.hdr, GDMA_VERIFY_VF_DRIVER_VERSION,
> + sizeof(req), sizeof(resp));
> +
> + req.protocol_ver_min = GDMA_PROTOCOL_FIRST;
> + req.protocol_ver_max = GDMA_PROTOCOL_LAST;
> +
> + err = gdma_send_request(gc, sizeof(req), &req, sizeof(resp), &resp);
> + if (err || resp.hdr.status) {
> + pr_err("VfVerifyVersionOutput: %d, status=0x%x\n", err,
> + resp.hdr.status);
> + return -EPROTO;
> + }
> +
> + return 0;
> +}
<...>
> +static int gdma_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> +{
> + struct gdma_context *gc;
> + void __iomem *bar0_va;
> + int bar = 0;
> + int err;
> +
> + err = pci_enable_device(pdev);
> + if (err)
> + return -ENXIO;
> +
> + pci_set_master(pdev);
> +
> + err = pci_request_regions(pdev, "gdma");
> + if (err)
> + goto disable_dev;
> +
> + err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
> + if (err)
> + goto release_region;
> +
> + err = -ENOMEM;
> + gc = vzalloc(sizeof(*gc));
> + if (!gc)
> + goto release_region;
> +
> + bar0_va = pci_iomap(pdev, bar, 0);
> + if (!bar0_va)
> + goto free_gc;
> +
> + gc->bar0_va = bar0_va;
> + gc->pci_dev = pdev;
> +
> + pci_set_drvdata(pdev, gc);
> +
> + gdma_init_registers(pdev);
> +
> + shm_channel_init(&gc->shm_channel, gc->shm_base);
> +
> + err = gdma_setup_irqs(pdev);
> + if (err)
> + goto unmap_bar;
> +
> + mutex_init(&gc->eq_test_event_mutex);
> +
> + err = hwc_create_channel(gc);
> + if (err)
> + goto remove_irq;
> +
> + err = gdma_verify_vf_version(pdev);
> + if (err)
> + goto remove_irq;
Will this VF driver be used in the guest VM? What will prevent from users to change it?
I think that such version negotiation scheme is not allowed.
Thanks
