Changes in switchtec_dma.c

d662a710c668a86a39ebaad334d9960a0cc776c2 - Merge tag 'dmaengine-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine

Fri, 17 Apr 2026 19:29:01 +0200

Merge tag 'dmaengine-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaenginePull dmaengine updates from Vinod Koul: "Core: - New devm_of_dma_controller_register() API New Support: - Support for RZ/G3L SoC - Loongson Multi-Channel DMA controller support - Conversion of Xilinx AXI DMA binding - DW AXI CV1800B DMA support - Switchtec DMA engine driver Updates: - AMD MDB Endpoint and non-LL mode support - DW edma virtual IRQ for interrupt-emulation, cyclic transfers support"* tag 'dmaengine-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (65 commits) dmaengine: dw-edma: Add non-LL mode dmaengine: dw-edma: Add AMD MDB Endpoint Support dt-bindings: dmaengine: Fix spelling mistake "Looongson" -> "Looogson" dmaengine: loongson: Fix spelling mistake "Looongson" -> "Looogson" dmaengine: loongson: New driver for the Loongson Multi-Channel DMA controller dt-bindings: dmaengine: Add Loongson Multi-Channel DMA controller dmaengine: loongson: loongson2-apb: Simplify locking with guard() and scoped_guard() dmaengine: loongson: loongson2-apb: Convert to devm_clk_get_enabled() dmaengine: loongson: loongson2-apb: Convert to dmaenginem_async_device_register() dmaengine: loongson: New directory for Loongson DMA controllers drivers dt-bindings: dma: xlnx,axi-dma: Convert to DT schema dt-bindings: dma: rz-dmac: Add conditional schema for RZ/G3L dmaengine: sh: rz-dmac: Add device_{pause,resume}() callbacks dmaengine: sh: rz-dmac: Add device_tx_status() callback dmaengine: sh: rz-dmac: Use rz_lmdesc_setup() to invalidate descriptors dmaengine: sh: rz-dmac: Drop unnecessary local_irq_save() call dmaengine: sh: rz-dmac: Drop goto instruction and label dmaengine: sh: rz-dmac: Drop read of CHCTRL register dmaengine: sh: rz_dmac: add RZ/{T2H,N2H} support dt-bindings: dma: renesas,rz-dmac: document RZ/{T2H,N2H} ... List of files: /linux/drivers/dma/switchtec_dma.c

3af11daeaeaa6f62494c7cb07265928162b440ab - dmaengine: switchtec-dma: Implement descriptor submission

Mon, 02 Mar 2026 22:04:19 +0100

dmaengine: switchtec-dma: Implement descriptor submissionOn prep, a spin lock is taken and the next entry in the circular bufferis filled. On submit, the spin lock just needs to be released as therequests are already pending.When switchtec_dma_issue_pending() is called, the sq_tail registeris written to indicate there are new jobs for the dma engine to starton.Pause and resume operations are implemented by writing to a controlregister.Signed-off-by: Kelvin Cao Co-developed-by: George Ge Signed-off-by: George Ge Reviewed-by: Christoph Hellwig Signed-off-by: Logan Gunthorpe Link: https://patch.msgid.link/20260302210419.3656-4-logang@deltatee.comSigned-off-by: Vinod Koul List of files: /linux/drivers/dma/switchtec_dma.c

30eba9df76adf1294e88214dbf9cea402fa7af37 - dmaengine: switchtec-dma: Implement hardware initialization and cleanup

Mon, 02 Mar 2026 22:04:18 +0100

dmaengine: switchtec-dma: Implement hardware initialization and cleanupInitialize the hardware and create the dma channel queues.Signed-off-by: Kelvin Cao Co-developed-by: George Ge Signed-off-by: George Ge Reviewed-by: Christoph Hellwig Reviewed-by: Frank Li Signed-off-by: Logan Gunthorpe Link: https://patch.msgid.link/20260302210419.3656-3-logang@deltatee.comSigned-off-by: Vinod Koul List of files: /linux/drivers/dma/switchtec_dma.c

d9587042b50f69d35a6e05c1b7fc9092e26625a6 - dmaengine: switchtec-dma: Introduce Switchtec DMA engine skeleton

Mon, 02 Mar 2026 22:04:17 +0100

dmaengine: switchtec-dma: Introduce Switchtec DMA engine skeletonSome Switchtec Switches can expose DMA engines via extra PCI functionson the upstream ports. At most one such function can be supported oneach upstream port. Each function can have one or more DMA channels.This patch is just the core PCI driver skeleton and dmaengine registration.Signed-off-by: Kelvin Cao Co-developed-by: George Ge Signed-off-by: George Ge Reviewed-by: Christoph Hellwig Reviewed-by: Frank Li Signed-off-by: Logan Gunthorpe Link: https://patch.msgid.link/20260302210419.3656-2-logang@deltatee.comSigned-off-by: Vinod Koul List of files: /linux/drivers/dma/switchtec_dma.c