diff options
| author | Wei Huang <wei.huang2@amd.com> | 2024-10-02 11:59:50 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2024-10-02 16:20:01 -0500 |
| commit | f69767a1ada3ac74be2e1ac0795a05e1d1384eff (patch) | |
| tree | 31ffb9fecd595d98a85f7a1b5c96d45e766e6821 /include/linux/pci.h | |
| parent | 9852d85ec9d492ebef56dc5f229416c925758edc (diff) | |
PCI: Add TLP Processing Hints (TPH) support
Add support for PCIe TLP Processing Hints (TPH) support (see PCIe r6.2,
sec 6.17).
Add TPH register definitions in pci_regs.h, including the TPH Requester
capability register, TPH Requester control register, TPH Completer
capability, and the ST fields of MSI-X entry.
Introduce pcie_enable_tph() and pcie_disable_tph(), enabling drivers to
toggle TPH support and configure specific ST mode as needed. Also add a new
kernel parameter, "pci=notph", allowing users to disable TPH support across
the entire system.
Link: https://lore.kernel.org/r/20241002165954.128085-2-wei.huang2@amd.com
Co-developed-by: Jing Liu <jing2.liu@intel.com>
Co-developed-by: Paul Luse <paul.e.luse@linux.intel.com>
Co-developed-by: Eric Van Tassell <Eric.VanTassell@amd.com>
Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Paul Luse <paul.e.luse@linux.intel.com>
Signed-off-by: Eric Van Tassell <Eric.VanTassell@amd.com>
Signed-off-by: Wei Huang <wei.huang2@amd.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Lukas Wunner <lukas@wunner.de>
Diffstat (limited to 'include/linux/pci.h')
| -rw-r--r-- | include/linux/pci.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h index 573b4c4c2be6..8351d76b6e12 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -434,6 +434,7 @@ struct pci_dev { unsigned int ats_enabled:1; /* Address Translation Svc */ unsigned int pasid_enabled:1; /* Process Address Space ID */ unsigned int pri_enabled:1; /* Page Request Interface */ + unsigned int tph_enabled:1; /* TLP Processing Hints */ unsigned int is_managed:1; /* Managed via devres */ unsigned int is_msi_managed:1; /* MSI release via devres installed */ unsigned int needs_freset:1; /* Requires fundamental reset */ @@ -534,6 +535,12 @@ struct pci_dev { /* These methods index pci_reset_fn_methods[] */ u8 reset_methods[PCI_NUM_RESET_METHODS]; /* In priority order */ + +#ifdef CONFIG_PCIE_TPH + u16 tph_cap; /* TPH capability offset */ + u8 tph_mode; /* TPH mode */ + u8 tph_req_type; /* TPH requester type */ +#endif }; static inline struct pci_dev *pci_physfn(struct pci_dev *dev) |