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).
V8->V9:
- Rebased on V5.15-rc2.
- Rename pcie_devcap to devcap, pcie_devcap2 to devcap2 to keep the same
style with commit 691392448065 ("PCI: Cache PCIe Device Capabilities
register").
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 devcap in more places
PCI: Cache 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 +++++++++-
.../admin-guide/kernel-parameters.txt | 5 ++
drivers/media/pci/cobalt/cobalt-driver.c | 4 +-
.../net/ethernet/chelsio/cxgb4/cxgb4_main.c | 4 +-
drivers/pci/iov.c | 67 ++++++++++++++++
drivers/pci/p2pdma.c | 48 +++++++++++
drivers/pci/pci-sysfs.c | 79 +++++++++++++++++++
drivers/pci/pci.c | 12 +--
drivers/pci/pci.h | 9 +++
drivers/pci/pcie/aspm.c | 11 +--
drivers/pci/probe.c | 75 +++++++++++++++---
drivers/pci/quirks.c | 3 +-
include/linux/pci.h | 1 +
include/uapi/linux/pci_regs.h | 5 ++
14 files changed, 332 insertions(+), 32 deletions(-)
--
2.22.0
