kernel/linux.git/include/linux/virtio.h, branch v6.6.132

Merge tag 'i2c-for-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

2023-09-04T20:44:11+00:00

Pull i2c updates from Wolfram Sang: "I2C has mainly cleanups this time and a few driver improvements. Because a lot of developers were on holidays (including myself) it was a good timing to apply lots of cleanups which would normally cause merge conflicts with other floating patches. Extra thanks go to Andi Shyti who backed me up when I was on a four week hiatus. This is also the reason that some patches were commited later than ideal" * tag 'i2c-for-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (67 commits) i2c: at91: Use dev_err_probe() instead of dev_err() I2C: ali15x3: Do PCI error checks on own line i2c: Make return value check more accurate and explicit for devm_pinctrl_get() i2c: designware: Add support for recovery when GPIO need pinctrl i2c: mlxcpld: Add support for extended transaction length i2c: mlxcpld: Allow driver to run on ARM64 architecture i2c: nforce2: Do PCI error check on own line i2c: sis5595: Do PCI error checks on own line i2c: qcom-cci: Fix error checking in cci_probe() i2c: muxes: pca954x: Add regulator support i2c: muxes: pca954x: Add MAX735x/MAX736x support dt-bindings: i2c: Add Maxim MAX735x/MAX736x variants dt-bindings: i2c: pca954x: Correct interrupt support i2c: pnx: Use devm_platform_get_and_ioremap_resource() i2c: pxa: Use devm_platform_get_and_ioremap_resource() i2c: s3c2410: Use devm_platform_get_and_ioremap_resource() i2c: sh_mobile: Use devm_platform_get_and_ioremap_resource() i2c: st: Use devm_platform_get_and_ioremap_resource() i2c: qcom-geni: Convert to devm_platform_ioremap_resource() i2c: stm32f4: Use devm_platform_get_and_ioremap_resource() ...

virtio_ring: introduce dma sync api for virtqueue

2023-09-03T22:10:23+00:00

These API has been introduced: * virtqueue_dma_need_sync * virtqueue_dma_sync_single_range_for_cpu * virtqueue_dma_sync_single_range_for_device These APIs can be used together with the premapped mechanism to sync the DMA address. Signed-off-by: Xuan Zhuo Message-Id: <20230810123057.43407-12-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin

virtio_ring: introduce dma map api for virtqueue

2023-09-03T22:10:23+00:00

Added virtqueue_dma_map_api* to map DMA addresses for virtual memory in advance. The purpose is to keep memory mapped across multiple add/get buf operations. Signed-off-by: Xuan Zhuo Message-Id: <20230810123057.43407-11-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin

virtio_ring: introduce virtqueue_reset()

2023-09-03T22:10:23+00:00

Introduce virtqueue_reset() to release all buffer inside vq. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang Message-Id: <20230810123057.43407-10-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin

virtio_ring: introduce virtqueue_dma_dev()

2023-09-03T22:10:23+00:00

Added virtqueue_dma_dev() to get DMA device for virtio. Then the caller can do dma operation in advance. The purpose is to keep memory mapped across multiple add/get buf operations. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang Message-Id: <20230810123057.43407-6-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin

virtio_ring: introduce virtqueue_set_dma_premapped()

2023-09-03T22:10:22+00:00

This helper allows the driver change the dma mode to premapped mode. Under the premapped mode, the virtio core do not do dma mapping internally. This just work when the use_dma_api is true. If the use_dma_api is false, the dma options is not through the DMA APIs, that is not the standard way of the linux kernel. Signed-off-by: Xuan Zhuo Message-Id: <20230810123057.43407-4-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin

virtio: Remove PM #ifdef guards to fix i2c driver

2023-08-08T13:36:54+00:00

A cleanup in the virtio i2c caused a build failure: drivers/i2c/busses/i2c-virtio.c:270:10: error: 'struct virtio_driver' has no member named 'freeze' drivers/i2c/busses/i2c-virtio.c:271:10: error: 'struct virtio_driver' has no member named 'restore' Change the structure definition to allow this cleanup to be applied everywhere. Fixes: 73d546c76235b ("i2c: virtio: Remove #ifdef guards for PM related functions") Signed-off-by: Arnd Bergmann Reviewed-by: Paul Cercueil Reviewed-by: Andi Shyti Link: https://lore.kernel.org/r/20230801105846.3708252-1-arnd@kernel.org Signed-off-by: Andi Shyti

virtio: Add missing documentation for structure fields

2023-06-27T14:47:09+00:00

Add missing documentation for the vqs_list_lock field of struct virtio_device, and the validate field of struct virtio_driver. ./scripts/kernel-doc says: .../virtio.h:131: warning: Function parameter or member 'vqs_list_lock' not described in 'virtio_device' .../virtio.h:192: warning: Function parameter or member 'validate' not described in 'virtio_driver' 2 warnings as Errors No functional changes intended. Signed-off-by: Simon Horman Message-Id: <20230510-virtio-kdoc-v3-1-e2681ed7a425@kernel.org> Signed-off-by: Michael S. Tsirkin Reviewed-by: Stefano Garzarella

virtio_ring: Use const to annotate read-only pointer params

2023-04-21T07:02:30+00:00

Add const to make the read-only pointer parameters clear, similar to many existing functions. To implement this change, the commit also introduces the use of `container_of_const` to implement `to_vvq`, which ensures the const-ness of read-only parameters and avoids accidental modification of their members. Signed-off-by: Feng Liu Reviewed-by: Jiri Pirko Reviewed-by: Parav Pandit Reviewed-by: Gavin Li Reviewed-by: Bodong Wang Message-Id: <20230310053428.3376-4-feliu@nvidia.com> Signed-off-by: Michael S. Tsirkin

virtio: Reorder fields in 'struct virtqueue'

2023-04-21T07:02:29+00:00

Group some variables based on their sizes to reduce hole and avoid padding. On x86_64, this shrinks the size of 'struct virtqueue' from 72 to 68 bytes. It saves a few bytes of memory. Signed-off-by: Christophe JAILLET Message-Id: <8f3d2e49270a2158717e15008e7ed7228196ba02.1676707807.git.christophe.jaillet@wanadoo.fr> Signed-off-by: Michael S. Tsirkin Acked-by: Peter Lafreniere Reviewed-by: Stefano Garzarella