10-Bit Tag capability, introduced in PCIe-4.0 increases the total Tag field size from 8 bits to 10 bits. This patchset is to enable 10-Bit tag for PCIe EP devices (include VF). V7->V8: - Add a kernel parameter pcie_tag_peer2peer to disable 10-bit tags. - Provide sysfs file to enable 10-bit tags. - Remove [PATCH V7 6/9] PCI: Enable 10-Bit Tag support for PCIe RP devices. - Rebased on v5.14-rc6. - Fix some other comments. Thanks to Bjorn who gave a lot of review comments. V6->V7: - Rebased on v5.14-rc3. - Change the "pci=disable_10bit_tag=" parameter to sysfs file to disable 10-Bit Tag Requester when need for p2pdma suggested by Leon. - Fix comment for p2pdma 10-bit tag check. V5->V6: - Rebased on v5.14-rc2. - Add Reviewed-by: Christoph Hellwig <hch@xxxxxx> in [PATCH V6 2/8]. - PCI: Add "pci=disable_10bit_tag=" parameter for peer-to-peer support. - Add a 10-bit tag check in P2PDMA. - Simplified implementation in [PATCH V6 6/8]. - Fix some comments in [PATCH V6 4/8]. V4->V5: - Fix warning variable 'capa' is uninitialized. - Fix warning unused variable 'pchild'. V3->V4: - Get the value of pcie_devcap2 in set_pcie_port_type(). - Add Reviewed-by: Christoph Hellwig <hch@xxxxxx> in [PATCH V4 1/6], [PATCH V4 3/6], [PATCH V4 4/6], [PATCH V4 5/6]. - Fix some code style. - Rebased on v5.13-rc6. V2->V3: - Use cached Device Capabilities Register suggested by Christoph. - Fix code style to avoid > 80 char lines. - Rename devcap2 to pcie_devcap2. V1->V2: Fix some comments by Christoph. - Store the devcap2 value in the pci_dev instead of reading it multiple times. - Change pci_info to pci_dbg to avoid the noisy log. - Rename ext_10bit_tag_comp_path to ext_10bit_tag. - Fix the compile error. - Rebased on v5.13-rc1. Dongdong Liu (8): PCI: Use cached Device Capabilities Register PCI: Use cached Device Capabilities 2 Register PCI: Add 10-Bit Tag register definitions PCI/sysfs: Add a 10-Bit Tag sysfs file PCIe Endpoint devices PCI/IOV: Add 10-Bit Tag sysfs files for VF devices PCI/P2PDMA: Add a 10-Bit Tag check in P2PDMA PCI: Enable 10-Bit Tag support for PCIe Endpoint device PCI/IOV: Enable 10-Bit Tag support for PCIe VF devices Documentation/ABI/testing/sysfs-bus-pci | 41 ++++++++++++- Documentation/admin-guide/kernel-parameters.txt | 5 ++ drivers/media/pci/cobalt/cobalt-driver.c | 5 +- drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c | 4 +- drivers/pci/iov.c | 68 +++++++++++++++++++++ drivers/pci/p2pdma.c | 48 +++++++++++++++ drivers/pci/pci-sysfs.c | 79 +++++++++++++++++++++++++ drivers/pci/pci.c | 18 +++--- drivers/pci/pci.h | 10 ++++ drivers/pci/pcie/aspm.c | 11 ++-- drivers/pci/probe.c | 79 ++++++++++++++++++++----- drivers/pci/quirks.c | 3 +- include/linux/pci.h | 3 + include/uapi/linux/pci_regs.h | 5 ++ 14 files changed, 341 insertions(+), 38 deletions(-) -- 2.7.4
