kernel/drivers/dma/ioat/dma.h, branch linux-6.18.y

dmaengine: ioat: Move system_has_dca_enabled() to dma.h

2025-08-27T18:14:07Z

Move the function prototype for system_has_dca_enabled() from hw.h to dma.h. This allows hw.h to be included from tools/, which will be used in a subsysequent commit to implement a userspace driver for Intel CBDMA devices in tools/testing/selftests/vfio. No functional change intended. Acked-by: Dave Jiang Acked-by: Shuah Khan Signed-off-by: David Matlack Link: https://lore.kernel.org/r/20250822212518.4156428-19-dmatlack@google.com Signed-off-by: Alex Williamson

dmaengine: ioat: fixing the wrong dma_dev->chancnt

2023-08-21T13:08:19Z

The chancnt would be updated in __dma_async_device_channel_register(), but it was assigned in ioat_enumerate_channels(). Therefore chancnt has the wrong value. Add chancnt member to the struct ioatdma_device, ioat_dma->chancnt is used in ioat, dma_dev->chancnt is used in dmaengine. Signed-off-by: Yajun Deng Reviewed-by: Dave Jiang Link: https://lore.kernel.org/r/20230815061151.2724474-1-yajun.deng@linux.dev Signed-off-by: Vinod Koul

dmaengine: ioat: remove unused declarations in dma.h

2022-09-29T17:16:09Z

ioat_ring_alloc_order and ioat_ring_max_alloc_order have been removed since commit cd60cd96137f ("dmaengine: IOATDMA: Removing descriptor ring reshape"), so remove them. Signed-off-by: Gaosheng Cui Acked-by: Dave Jiang Link: https://lore.kernel.org/r/20220911091817.3214271-1-cuigaosheng1@huawei.com Signed-off-by: Vinod Koul

dmaengine: ioat: convert tasklets to use new tasklet_setup() API

2020-09-18T06:49:06Z

In preparation for unconditionally passing the struct tasklet_struct pointer to all tasklet callbacks, switch to using the new tasklet_setup() and from_tasklet() to pass the tasklet pointer explicitly. Signed-off-by: Romain Perier Signed-off-by: Allen Pais Acked-by: Dave Jiang Link: https://lore.kernel.org/r/20200831103542.305571-10-allen.lkml@gmail.com Signed-off-by: Vinod Koul

dmaengine: ioat setting ioat timeout as module parameter

2020-07-06T09:19:34Z

DMA transaction time to completion is a function of PCI bandwidth, transaction size and a queue depth. So hard coded value for timeouts might be wrong for some scenarios. Signed-off-by: Leonid Ravich Reviewed-by: Dave Jiang Link: https://lore.kernel.org/r/20200701184816.29138-1-leonid.ravich@dell.com Signed-off-by: Vinod Koul

dmaengine: ioat: Decreasing allocation chunk size 2M->512K

2020-04-17T11:58:39Z

requreing kmalloc of 2M high chance to fail in fragmented memory. IOAT ring requires 64k * 64B memory which will be achived by 512k * 8 allocation instead of 2M * 2. Acked-by: Dave Jiang Signed-off-by: Leonid Ravich Link: https://lore.kernel.org/r/20200416170628.16196-2-leonid.ravich@dell.com Signed-off-by: Vinod Koul

dmaengine: ioat: fixing chunk sizing macros dependency

2020-04-17T11:58:39Z

changing macros which assumption is chunk size of 2M, which can be other size prepare for changing allocation chunk size. Acked-by: Dave Jiang Signed-off-by: Leonid Ravich Link: https://lore.kernel.org/r/20200416170628.16196-1-leonid.ravich@dell.com Signed-off-by: Vinod Koul

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 7

2019-05-21T09:28:40Z

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 this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details the full gnu general public license is included in this distribution in the file called copying extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 9 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Steve Winslow Reviewed-by: Kate Stewart Reviewed-by: Jilayne Lovejoy Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154041.244154651@linutronix.de Signed-off-by: Greg Kroah-Hartman

dmaengine: ioatdma: Add Snow Ridge ioatdma device id

2019-02-25T06:48:38Z

Add Snowridge Xeon-D ioatdma PCI device id. Also applies for Icelake SP Xeon. This introduces ioatdma v3.4 platform. Also bumping driver version to 5.0 since we are adding additional code for 3.4 support. Signed-off-by: Dave Jiang Signed-off-by: Vinod Koul

dmaengine: Convert timers to use timer_setup()

2017-10-24T14:41:21Z

In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Signed-off-by: Kees Cook Signed-off-by: Vinod Koul