kernel/linux.git/include/misc/cxl.h, branch v6.12.80

cxl: fix typo in comment

2022-11-24T12:12:19+00:00

Spelling mistake (triple letters) in comment. Detected with the help of Coccinelle. Signed-off-by: Julia Lawall Acked-by: Andrew Donnellan Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220521111145.81697-82-Julia.Lawall@inria.fr

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32+00:00

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman

Revert "cxl: Add cxl_slot_is_supported API"

2018-07-02T13:54:32+00:00

Remove abandonned capi support for the Mellanox CX4. This reverts commit 4e56f858bdde5cbfb70f61baddfaa56a8ed851bf. Signed-off-by: Frederic Barrat Acked-by: Andrew Donnellan Signed-off-by: Michael Ellerman

Revert "cxl: Add cxl_check_and_switch_mode() API to switch bi-modal cards"

2018-07-02T13:54:31+00:00

Remove abandonned capi support for the Mellanox CX4. This reverts commit b0b5e5918ad1babfd1d43d98c7281926a7b57b9f. Signed-off-by: Alastair D'Silva Acked-by: Andrew Donnellan Signed-off-by: Michael Ellerman

Revert "cxl: Add preliminary workaround for CX4 interrupt limitation"

2018-07-02T13:54:31+00:00

Remove abandonned capi support for the Mellanox CX4. This reverts commit cbce0917e2e47d4bf5aa3b5fd6b1247f33e1a126. Signed-off-by: Alastair D'Silva Acked-by: Andrew Donnellan Signed-off-by: Michael Ellerman

Revert "cxl: Add kernel API to allow a context to operate with relocate disabled"

2018-07-02T13:54:30+00:00

Remove abandonned capi support for the Mellanox CX4. The symbol 'cxl_set_translation_mode' is never called, so ctx->real_mode is always false. This reverts commit 7a0d85d313c2066712e530e668bc02bb741a685c. Signed-off-by: Alastair D'Silva Acked-by: Andrew Donnellan Signed-off-by: Michael Ellerman

the rest of drivers/*: annotate ->poll() instances

2017-11-28T16:06:58+00:00

Signed-off-by: Al Viro

cxl: Add cxl_check_and_switch_mode() API to switch bi-modal cards

2016-07-14T10:28:11+00:00

Add a new API, cxl_check_and_switch_mode() to allow for switching of bi-modal CAPI cards, such as the Mellanox CX-4 network card. When a driver requests to switch a card to CAPI mode, use PCI hotplug infrastructure to remove all PCI devices underneath the slot. We then write an updated mode control register to the CAPI VSEC, hot reset the card, and reprobe the card. As the card may present a different set of PCI devices after the mode switch, use the infrastructure provided by the pnv_php driver and the OPAL PCI slot management facilities to ensure that: * the old devices are removed from both the OPAL and Linux device trees * the new devices are probed by OPAL and added to the OPAL device tree * the new devices are added to the Linux device tree and probed through the regular PCI device probe path As such, introduce a new option, CONFIG_CXL_BIMODAL, with a dependency on the pnv_php driver. Refactor existing code that touches the mode control register in the regular single mode case into a new function, setup_cxl_protocol_area(). Co-authored-by: Ian Munsie Cc: Gavin Shan Signed-off-by: Andrew Donnellan Signed-off-by: Ian Munsie Reviewed-by: Gavin Shan Signed-off-by: Michael Ellerman

cxl: Add preliminary workaround for CX4 interrupt limitation

2016-07-14T10:27:02+00:00

The Mellanox CX4 has a hardware limitation where only 4 bits of the AFU interrupt number can be passed to the XSL when sending an interrupt, limiting it to only 15 interrupts per context (AFU interrupt number 0 is invalid). In order to overcome this, we will allocate additional contexts linked to the default context as extra address space for the extra interrupts - this will be implemented in the next patch. This patch adds the preliminary support to allow this, by way of adding a linked list in the context structure that we use to keep track of the contexts dedicated to interrupts, and an API to simultaneously iterate over the related context structures, AFU interrupt numbers and hardware interrupt numbers. The point of using a single API to iterate these is to hide some of the details of the iteration from external code, and to reduce the number of APIs that need to be exported via base.c to allow built in code to call. Signed-off-by: Ian Munsie Reviewed-by: Frederic Barrat Reviewed-by: Andrew Donnellan Signed-off-by: Michael Ellerman

cxl: Add kernel APIs to get & set the max irqs per context

2016-07-14T10:26:57+00:00

These APIs will be used by the Mellanox CX4 support. While they function standalone to configure existing behaviour, their primary purpose is to allow the Mellanox driver to inform the cxl driver of a hardware limitation, which will be used in a future patch. Signed-off-by: Ian Munsie Reviewed-by: Frederic Barrat Reviewed-by: Andrew Donnellan Signed-off-by: Michael Ellerman