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2020-10-28misc: mic: remove the MIC driversSudeep Dutt1-588/+0
This patch removes the MIC drivers from the kernel tree since the corresponding devices have been discontinued. Removing the dma and char-misc changes in one patch and merging via the char-misc tree is best to avoid any potential build breakage. Cc: Nikhil Rao <[email protected]> Reviewed-by: Ashutosh Dixit <[email protected]> Signed-off-by: Sudeep Dutt <[email protected]> Acked-By: Vinod Koul <[email protected]> Reviewed-by: Sherry Sun <[email protected]> Link: https://lore.kernel.org/r/8c1443136563de34699d2c084df478181c205db4.1603854416.git.sudeep.dutt@intel.com Signed-off-by: Greg Kroah-Hartman <[email protected]>
2020-10-06dma-mapping: split <linux/dma-mapping.h>Christoph Hellwig1-0/+1
Split out all the bits that are purely for dma_map_ops implementations and related code into a new <linux/dma-map-ops.h> header so that they don't get pulled into all the drivers. That also means the architecture specific <asm/dma-mapping.h> is not pulled in by <linux/dma-mapping.h> any more, which leads to a missing includes that were pulled in by the x86 or arm versions in a few not overly portable drivers. Signed-off-by: Christoph Hellwig <[email protected]>
2020-02-14misc: Use kzalloc() instead of kmalloc() with flag GFP_ZERO.Huang Zijiang1-1/+1
Use kzalloc instead of manually setting kmalloc with flag GFP_ZERO since kzalloc sets allocated memory to zero. Signed-off-by: Huang Zijiang <[email protected]> Signed-off-by: Yi Wang <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
2019-06-05treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 290Thomas Gleixner1-13/+1
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 version 2 as published by the free software foundation 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-only has been chosen to replace the boilerplate/reference in 39 file(s). Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Allison Randal <[email protected]> Reviewed-by: Alexios Zavras <[email protected]> Cc: [email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
2019-02-26mic: Rename ioremap pointer to remapVincent Whitchurch1-4/+4
Some architectures (like MIPS) implement ioremap as a macro, and this leads to conflicts with the ioremap function pointer in various mic structures. drivers/misc/mic/vop/vop_vringh.c: In function 'vop_virtio_init_post': drivers/misc/mic/vop/vop_vringh.c:86:13: error: macro "ioremap" passed 3 arguments, but takes just 2 Rename ioremap to remap to fix this. Likewise for iounmap. Signed-off-by: Vincent Whitchurch <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2018-12-20dma-mapping: zero memory returned from dma_alloc_*Christoph Hellwig1-1/+1
If we want to map memory from the DMA allocator to userspace it must be zeroed at allocation time to prevent stale data leaks. We already do this on most common architectures, but some architectures don't do this yet, fix them up, either by passing GFP_ZERO when we use the normal page allocator or doing a manual memset otherwise. Signed-off-by: Christoph Hellwig <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> [m68k] Acked-by: Sam Ravnborg <[email protected]> [sparc]
2017-01-24treewide: Constify most dma_map_ops structuresBart Van Assche1-2/+2
Most dma_map_ops structures are never modified. Constify these structures such that these can be write-protected. This patch has been generated as follows: git grep -l 'struct dma_map_ops' | xargs -d\\n sed -i \ -e 's/struct dma_map_ops/const struct dma_map_ops/g' \ -e 's/const struct dma_map_ops {/struct dma_map_ops {/g' \ -e 's/^const struct dma_map_ops;$/struct dma_map_ops;/' \ -e 's/const const struct dma_map_ops /const struct dma_map_ops /g'; sed -i -e 's/const \(struct dma_map_ops intel_dma_ops\)/\1/' \ $(git grep -l 'struct dma_map_ops intel_dma_ops'); sed -i -e 's/const \(struct dma_map_ops dma_iommu_ops\)/\1/' \ $(git grep -l 'struct dma_map_ops' | grep ^arch/powerpc); sed -i -e '/^struct vmd_dev {$/,/^};$/ s/const \(struct dma_map_ops[[:blank:]]dma_ops;\)/\1/' \ -e '/^static void vmd_setup_dma_ops/,/^}$/ s/const \(struct dma_map_ops \*dest\)/\1/' \ -e 's/const \(struct dma_map_ops \*dest = \&vmd->dma_ops\)/\1/' \ drivers/pci/host/*.c sed -i -e '/^void __init pci_iommu_alloc(void)$/,/^}$/ s/dma_ops->/intel_dma_ops./' arch/ia64/kernel/pci-dma.c sed -i -e 's/static const struct dma_map_ops sn_dma_ops/static struct dma_map_ops sn_dma_ops/' arch/ia64/sn/pci/pci_dma.c sed -i -e 's/(const struct dma_map_ops \*)//' drivers/misc/mic/bus/vop_bus.c Signed-off-by: Bart Van Assche <[email protected]> Reviewed-by: Christoph Hellwig <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Boris Ostrovsky <[email protected]> Cc: David Woodhouse <[email protected]> Cc: Juergen Gross <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: [email protected] Cc: [email protected] Cc: Russell King <[email protected]> Cc: [email protected] Signed-off-by: Doug Ledford <[email protected]>
2016-08-04dma-mapping: use unsigned long for dma_attrsKrzysztof Kozlowski1-10/+10
The dma-mapping core and the implementations do not change the DMA attributes passed by pointer. Thus the pointer can point to const data. However the attributes do not have to be a bitfield. Instead unsigned long will do fine: 1. This is just simpler. Both in terms of reading the code and setting attributes. Instead of initializing local attributes on the stack and passing pointer to it to dma_set_attr(), just set the bits. 2. It brings safeness and checking for const correctness because the attributes are passed by value. Semantic patches for this change (at least most of them): virtual patch virtual context @r@ identifier f, attrs; @@ f(..., - struct dma_attrs *attrs + unsigned long attrs , ...) { ... } @@ identifier r.f; @@ f(..., - NULL + 0 ) and // Options: --all-includes virtual patch virtual context @r@ identifier f, attrs; type t; @@ t f(..., struct dma_attrs *attrs); @@ identifier r.f; @@ f(..., - NULL + 0 ) Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Krzysztof Kozlowski <[email protected]> Acked-by: Vineet Gupta <[email protected]> Acked-by: Robin Murphy <[email protected]> Acked-by: Hans-Christian Noren Egtvedt <[email protected]> Acked-by: Mark Salter <[email protected]> [c6x] Acked-by: Jesper Nilsson <[email protected]> [cris] Acked-by: Daniel Vetter <[email protected]> [drm] Reviewed-by: Bart Van Assche <[email protected]> Acked-by: Joerg Roedel <[email protected]> [iommu] Acked-by: Fabien Dessenne <[email protected]> [bdisp] Reviewed-by: Marek Szyprowski <[email protected]> [vb2-core] Acked-by: David Vrabel <[email protected]> [xen] Acked-by: Konrad Rzeszutek Wilk <[email protected]> [xen swiotlb] Acked-by: Joerg Roedel <[email protected]> [iommu] Acked-by: Richard Kuo <[email protected]> [hexagon] Acked-by: Geert Uytterhoeven <[email protected]> [m68k] Acked-by: Gerald Schaefer <[email protected]> [s390] Acked-by: Bjorn Andersson <[email protected]> Acked-by: Hans-Christian Noren Egtvedt <[email protected]> [avr32] Acked-by: Vineet Gupta <[email protected]> [arc] Acked-by: Robin Murphy <[email protected]> [arm64 and dma-iommu] Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-04-30misc: mic: Remove return statements from void functionsAmitoj Kaur Chawla1-3/+3
Return statements at the end of void functions are useless. The Coccinelle semantic patch used to make this change is as follows: //<smpl> @@ identifier f; expression e; @@ void f(...) { <... - return e; ...> } //</smpl> Signed-off-by: Amitoj Kaur Chawla <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2016-02-09misc: mic: MIC host and card driver changes to enable VOPSudeep Dutt1-2/+121
This patch modifies the MIC host and card drivers to start using the VOP driver. The MIC host and card drivers now implement the VOP bus operations and register a VOP device on the VOP bus. MIC driver stack documentation is also updated to include the new VOP driver. Reviewed-by: Ashutosh Dixit <[email protected]> Signed-off-by: Sudeep Dutt <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2016-02-09misc: mic: Remove MIC X100 host virtio functionalitySudeep Dutt1-2/+0
This patch deletes the virtio functionality from the MIC X100 host driver. A subsequent patch will re-enable this functionality by consolidating the hardware independent logic in a new Virtio over PCIe (VOP) driver. Reviewed-by: Ashutosh Dixit <[email protected]> Signed-off-by: Sudeep Dutt <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2015-10-04misc: mic: Remove COSM functionality from the MIC host driverAshutosh Dixit1-230/+87
Since COSM functionality is now moved into a separate COSM driver drivers, this patch removes this functionality from the base MIC host driver. The MIC host driver now implements cosm_hw_ops and registers a COSM device which allows the COSM driver to trigger boot/shutdown/reset of the MIC devices via the cosm_hw_ops. Reviewed-by: Nikhil Rao <[email protected]> Reviewed-by: Sudeep Dutt <[email protected]> Signed-off-by: Dasaratharaman Chandramouli <[email protected]> Signed-off-by: Ashutosh Dixit <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2015-05-24misc: mic: MIC host driver specific changes to enable SCIFSudeep Dutt1-10/+254
MIC host driver specific changes to enable SCIF. This patch implements the SCIF hardware bus operations and registers a SCIF device on the SCIF hardware bus. Reviewed-by: Nikhil Rao <[email protected]> Reviewed-by: Ashutosh Dixit <[email protected]> Signed-off-by: Sudeep Dutt <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2015-03-25misc: mic: fixup return type of wait_for_completion_timeoutNicholas Mc Guire1-7/+7
return type of wait_for_completion_timeout is unsigned long not int. The rc variable is renamed timeout to reflect its use and the type adjusted to unsigned long. Signed-off-by: Nicholas Mc Guire <[email protected]> Acked-by: Sudeep Dutt <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2014-07-11misc: mic: add dma support in host driverSiva Yerramreddy1-1/+82
This patch adds a dma device on the mic virtual bus and uses this dmaengine to transfer data for virtio devices Reviewed-by: Nikhil Rao <[email protected]> Signed-off-by: Sudeep Dutt <[email protected]> Signed-off-by: Ashutosh Dixit <[email protected]> Signed-off-by: Siva Yerramreddy <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2013-11-27misc: mic: Fix endianness issues.Ashutosh Dixit1-1/+1
Endianness issues are now consistent as per the documentation in host/mic_virtio.h. Sparse warnings related to endianness are also fixed. Note that the MIC driver implementation assumes that the host can be both BE or LE whereas the card is always LE. Reported-by: Fengguang Wu <[email protected]> Reviewed-by: Sudeep Dutt <[email protected]> Reviewed-by: Nikhil Rao <[email protected]> Signed-off-by: Ashutosh Dixit <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2013-11-15tree-wide: use reinit_completion instead of INIT_COMPLETIONWolfram Sang1-1/+1
Use this new function to make code more comprehensible, since we are reinitialzing the completion, not initializing. [[email protected]: linux-next resyncs] Signed-off-by: Wolfram Sang <[email protected]> Acked-by: Linus Walleij <[email protected]> (personally at LCE13) Cc: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-10-30misc: mic: Fixes for randconfig build errors and warnings.Ashutosh Dixit1-0/+1
This patch fixes the build errors and warnings reported at https://lkml.org/lkml/2013/10/29/421. Co-author: Dasaratharaman Chandramouli <[email protected]> Reviewed-by: Sudeep Dutt <[email protected]> Reported-by: Jim Davis <[email protected]> Signed-off-by: Ashutosh Dixit <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2013-10-05misc: mic: Enable OSPM suspend and resume support.Dasaratharaman Chandramouli1-3/+117
This patch enables support for OSPM suspend and resume in the MIC driver. During a host suspend event, the driver performs an orderly shutdown of the cards if they are online. Upon resume, any cards that were previously online before suspend are rebooted. The driver performs an orderly shutdown of the card primarily to ensure that applications in the card are terminated and mounted devices are safely un-mounted before the card is powered down in the event of an OSPM suspend. The driver makes use of the MIC daemon to accomplish OSPM suspend and resume. The driver registers a PM notifier per MIC device. The devices get notified synchronously during PM_SUSPEND_PREPARE and PM_POST_SUSPEND phases. During the PM_SUSPEND_PREPARE phase, the driver performs one of the following three tasks. 1) If the card is 'offline', the driver sets the card to a 'suspended' state and returns. 2) If the card is 'online', the driver initiates card shutdown by setting the card state to suspending. This notifies the MIC daemon which invokes shutdown and sets card state to 'suspended'. The driver returns after the shutdown is complete. 3) If the card is already being shutdown, possibly by a host user space application, the driver sets the card state to 'suspended' and returns after the shutdown is complete. During the PM_POST_SUSPEND phase, the driver simply notifies the daemon and returns. The daemon boots those cards that were previously online during the suspend phase. Signed-off-by: Ashutosh Dixit <[email protected]> Signed-off-by: Nikhil Rao <[email protected]> Signed-off-by: Harshavardhan R Kharche <[email protected]> Signed-off-by: Sudeep Dutt <[email protected]> Signed-off-by: Dasaratharaman Chandramouli <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2013-09-27misc: mic: header file cleanups.Sudeep Dutt1-1/+1
Dont use same name for header files in different folders. These changes were suggested by Greg Kroah-Hartman during the code review @ https://lkml.org/lkml/2013/9/6/18 Reported-by: Greg Kroah-Hartman <[email protected]> Signed-off-by: Ashutosh Dixit <[email protected]> Signed-off-by: Dasaratharaman Chandramouli <[email protected]> Signed-off-by: Nikhil Rao <[email protected]> Signed-off-by: Harshavardhan R Kharche <[email protected]> Signed-off-by: Sudeep Dutt <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2013-09-26Intel MIC Host Driver Changes for Virtio Devices.Ashutosh Dixit1-1/+2
This patch introduces the host "Virtio over PCIe" interface for Intel MIC. It allows creating user space backends on the host and instantiating virtio devices for them on the Intel MIC card. It uses the existing VRINGH infrastructure in the kernel to access virtio rings from the host. A character device per MIC is exposed with IOCTL, mmap and poll callbacks. This allows the user space backend to: (a) add/remove a virtio device via a device page. (b) map (R/O) virtio rings and device page to user space. (c) poll for availability of data. (d) copy a descriptor or entire descriptor chain to/from the card. (e) modify virtio configuration. (f) handle virtio device reset. The buffers are copied over using CPU copies for this initial patch and host initiated MIC DMA support is planned for future patches. The avail and desc virtio rings are in host memory and the used ring is in card memory to maximize writes across PCIe for performance. Co-author: Sudeep Dutt <[email protected]> Signed-off-by: Ashutosh Dixit <[email protected]> Signed-off-by: Caz Yokoyama <[email protected]> Signed-off-by: Dasaratharaman Chandramouli <[email protected]> Signed-off-by: Nikhil Rao <[email protected]> Signed-off-by: Harshavardhan R Kharche <[email protected]> Signed-off-by: Sudeep Dutt <[email protected]> Acked-by: Yaozu (Eddie) Dong <[email protected]> Reviewed-by: Peter P Waskiewicz Jr <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2013-09-26Intel MIC Host Driver, card OS state management.Sudeep Dutt1-0/+184
This patch enables the following features: a) Boots and shuts down the card via sysfs entries. b) Allocates and maps a device page for communication with the card driver and updates the device page address via scratchpad registers. c) Provides sysfs entries for shutdown status, kernel command line, ramdisk and log buffer information. Co-author: Dasaratharaman Chandramouli <[email protected]> Signed-off-by: Ashutosh Dixit <[email protected]> Signed-off-by: Caz Yokoyama <[email protected]> Signed-off-by: Dasaratharaman Chandramouli <[email protected]> Signed-off-by: Harshavardhan R Kharche <[email protected]> Signed-off-by: Nikhil Rao <[email protected]> Signed-off-by: Sudeep Dutt <[email protected]> Acked-by: Yaozu (Eddie) Dong <[email protected]> Reviewed-by: Peter P Waskiewicz Jr <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
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