kernel.git/drivers/pci/tph.c, branch linux-rolling-stableHosts the 0x221E linux distro kernel.
https://git.0xinfinity.dev/distro/kernel.git/atom?h=linux-rolling-stable2025-11-09T10:13:02ZPCI/TPH: Expose pcie_tph_get_st_table_loc()2025-11-09T10:13:02ZYishai Hadas2025-10-27T09:34:01Zurn:sha1:7b8a8ec20cfce2298f6737089f5d17407ea346b4
Expose pcie_tph_get_st_table_loc() to be used by drivers as will be done
in the next patch from the series.
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Edward Srouji <edwards@nvidia.com>
Link: https://patch.msgid.link/20251027-st-direct-mode-v1-1-e0ad953866b6@nvidia.com
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
PCI/TPH: Expose pcie_tph_get_st_table_size()2025-07-23T05:27:32ZYishai Hadas2025-07-17T12:17:25Zurn:sha1:0a61ec9cc51b0e43981222005444508437e95b33
Expose pcie_tph_get_st_table_size() to be used by drivers as will be
done in the next patch from the series.
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/9ae851e0ee42cc56d2a30276e116b65091030ceb.1752752567.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
PCI/TPH: Replace the broken MSI-X control word update2025-04-09T18:47:30ZThomas Gleixner2025-03-19T10:56:58Zurn:sha1:71296eae5887de830a84e9b350bd360c560e74f9
The driver walks the MSI descriptors to test whether a descriptor exists
for a given index. That's just abuse of the MSI internals.
The same test can be done with a single function call by looking up whether
there is a Linux interrupt number assigned at the index.
What's worse is that the function is completely unserialized against
modifications of the MSI-X control by operations issued from the interrupt
core. It also brings the PCI/MSI-X internal cached control word out of
sync.
Remove the trainwreck and invoke the function provided by the PCI/MSI core
to update it.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/all/20250319105506.744271447@linutronix.de
Revert "Merge tag 'irq-msi-2025-03-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip"2025-03-28T18:22:54ZLinus Torvalds2025-03-28T18:22:54Zurn:sha1:112e43e9fd3b999513b1914e2bf523ae509f4c7d
This reverts commit 36f5f026df6c1cd8a20373adc4388d2b3401ce91, reversing
changes made to 43a7eec035a5b64546c8adefdc9cf96a116da14b.
Thomas says:
"I just noticed that for some incomprehensible reason, probably sheer
incompetemce when trying to utilize b4, I managed to merge an outdated
_and_ buggy version of that series.
Can you please revert that merge completely?"
Done.
Requested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
PCI/TPH: Replace the broken MSI-X control word update2025-03-13T17:58:00ZThomas Gleixner2025-03-13T13:03:50Zurn:sha1:79273d0a40076601b1d37ff60e2ce8305f0a5d0d
The driver walks the MSI descriptors to test whether a descriptor exists
for a given index. That's just abuse of the MSI internals.
The same test can be done with a single function call by looking up whether
there is a Linux interrupt number assigned at the index.
What's worse is that the function is completely unserialized against
modifications of the MSI-X control by operations issued from the interrupt
core. It also brings the PCI/MSI-X internal cached control word out of
sync.
Remove the trainwreck and invoke the function provided by the PCI/MSI core
to update it.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/all/20250313130321.898592817@linutronix.de
PCI/TPH: Restore TPH Requester Enable correctly2025-02-06T16:30:11ZRobin Murphy2025-02-05T12:52:13Zurn:sha1:6f64b83d9fe9729000a0616830cb1606945465d8
When we reenable TPH after changing a Steering Tag value, we need the
actual TPH Requester Enable value, not the ST Mode (which only happens to
work out by chance for non-extended TPH in interrupt vector mode).
Link: https://lore.kernel.org/r/13118098116d7bce07aa20b8c52e28c7d1847246.1738759933.git.robin.murphy@arm.com
Fixes: d2e8a34876ce ("PCI/TPH: Add Steering Tag support")
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Wei Huang <wei.huang2@amd.com>
PCI/TPH: Add Steering Tag support2024-10-02T21:23:10ZWei Huang2024-10-02T16:59:51Zurn:sha1:d2e8a34876ce69b27f450eebfc550ab8e316f752
Add pcie_tph_get_cpu_st() to allow a caller to retrieve Steering Tags for a
target memory associated with a specific CPU. The ST tag is retrieved by
invoking PCI ACPI "_DSM to Query Cache Locality TPH Features" method
(rev=0x7, func=0xF) of the device's Root Port device.
Add pcie_tph_set_st_entry() to update the device's Steering Tags. The tags
will be written into the device's MSI-X table or the ST table located in
the TPH Extended Capability space.
Co-developed-by: Eric Van Tassell <Eric.VanTassell@amd.com>
Link: https://lore.kernel.org/r/20241002165954.128085-3-wei.huang2@amd.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>
PCI: Add TLP Processing Hints (TPH) support2024-10-02T21:20:01ZWei Huang2024-10-02T16:59:50Zurn:sha1:f69767a1ada3ac74be2e1ac0795a05e1d1384eff
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>