linux/drivers/dma/dmaengine.c, branch v5.0

Merge branch 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax

2018-08-26T18:48:42Z

Pull IDA updates from Matthew Wilcox: "A better IDA API: id = ida_alloc(ida, GFP_xxx); ida_free(ida, id); rather than the cumbersome ida_simple_get(), ida_simple_remove(). The new IDA API is similar to ida_simple_get() but better named. The internal restructuring of the IDA code removes the bitmap preallocation nonsense. I hope the net -200 lines of code is convincing" * 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax: (29 commits) ida: Change ida_get_new_above to return the id ida: Remove old API test_ida: check_ida_destroy and check_ida_alloc test_ida: Convert check_ida_conv to new API test_ida: Move ida_check_max test_ida: Move ida_check_leaf idr-test: Convert ida_check_nomem to new API ida: Start new test_ida module target/iscsi: Allocate session IDs from an IDA iscsi target: fix session creation failure handling drm/vmwgfx: Convert to new IDA API dmaengine: Convert to new IDA API ppc: Convert vas ID allocation to new IDA API media: Convert entity ID allocation to new IDA API ppc: Convert mmu context allocation to new IDA API Convert net_namespace to new IDA API cb710: Convert to new IDA API rsxx: Convert to new IDA API osd: Convert to new IDA API sd: Convert to new IDA API ...

dmaengine: Convert to new IDA API

2018-08-22T03:54:19Z

Simpler and shorter code. Signed-off-by: Matthew Wilcox Acked-by: Vinod Koul

dmaengine: add a new helper dmaenginem_async_device_register

2018-07-30T05:20:22Z

This patch adds the dmaenginem_async_device_register for DMA code. Use the Devres to call the release for the DMA engine driver. Signed-off-by: Huang Shijie Signed-off-by: Vinod Koul

dmaengine: dma_request_chan_by_mask() to handle deferred probing

2018-07-25T12:34:15Z

If there are no DMA devices registered yet, return with EPROBE_DEFER similarly to the case when requesting a slave channel. Signed-off-by: Peter Ujfalusi Signed-off-by: Vinod Koul

dmaengine: add support for reporting pause and resume separately

2018-07-09T17:29:04Z

'cmd_pause' DMA channel capability means that respective DMA engine supports both pausing and resuming given DMA channel. However, in some cases it is important to know if DMA channel can be paused without the need to resume it. This is a typical requirement for proper residue reading on transfer timeout in UART drivers. There are also some DMA engines with limited hardware, which doesn't really support resuming. Reporting pause and resume capabilities separately allows UART drivers to properly check for the really required capabilities and operate in DMA mode also in systems with limited DMA hardware. On the other hand drivers, which rely on full channel suspend/resume support, should now check for both 'pause' and 'resume' features. Existing clients of dma_get_slave_caps() have been checked and the only driver which rely on proper channel resuming is soc-generic-dmaengine-pcm driver, which has been updated to check the newly added capability. Existing 'cmd_pause' now only indicates that DMA engine support pausing given DMA channel. Signed-off-by: Marek Szyprowski Acked-by: Mark Brown Signed-off-by: Vinod Koul

fix a series of Documentation/ broken file name references

2018-06-15T21:10:01Z

As files move around, their previous links break. Fix the references for them. Acked-by: Andy Shevchenko Signed-off-by: Mauro Carvalho Chehab Acked-by: Jonathan Corbet

dmaengine: remove BUG_ON while registering devices

2017-08-28T04:09:46Z

DMAengine core has BUG_ON to check for mandatory operations and ones based on capabilities, but they use BUG_ON, so remove and move to error returns and logging the errors gracefully Acked-by: Dan Williams Signed-off-by: Vinod Koul

dmaengine: remove DMA_SG as it is dead code in kernel

2017-08-22T03:52:11Z

There are no in kernel consumers for DMA_SG op. Removing operation, dead code, and test code in dmatest. Signed-off-by: Dave Jiang Reviewed-by: Linus Walleij Cc: Gary Hook Cc: Ludovic Desroches Cc: Kedareswara rao Appana Cc: Li Yang Cc: Michal Simek Signed-off-by: Vinod Koul

dmaengine: Fix array index out of bounds warning in __get_unmap_pool()

2017-03-14T04:41:27Z

This fixes the following warning when building with clang and CONFIG_DMA_ENGINE_RAID=n : drivers/dma/dmaengine.c:1102:11: error: array index 2 is past the end of the array (which contains 1 element) [-Werror,-Warray-bounds] return &unmap_pool[2]; ^ ~ drivers/dma/dmaengine.c:1083:1: note: array 'unmap_pool' declared here static struct dmaengine_unmap_pool unmap_pool[] = { ^ drivers/dma/dmaengine.c:1104:11: error: array index 3 is past the end of the array (which contains 1 element) [-Werror,-Warray-bounds] return &unmap_pool[3]; ^ ~ drivers/dma/dmaengine.c:1083:1: note: array 'unmap_pool' declared here static struct dmaengine_unmap_pool unmap_pool[] = { Signed-off-by: Matthias Kaehlcke Reviewed-by: Dan Williams Signed-off-by: Vinod Koul

dmaengine: Convert ID allocation to an IDA

2017-01-02T04:16:32Z

dmaengine currently uses an IDR to allocate DMA IDs, but it only needs to know whether IDs are in use or not; the ID to pointer functionality of the IDR is unused. That means it can use the more space-efficient IDA. Signed-off-by: Matthew Wilcox Signed-off-by: Vinod Koul