On Thu, Mar 23, 2023 at 11:49:37AM +0800, Cai Huoqing wrote: > Add support for HDMA NATIVE, as long the IP design has set > the compatible register map parameter-HDMA_NATIVE, > which allows compatibility for native HDMA register configuration. > > The HDMA Hyper-DMA IP is an enhancement of the eDMA embedded-DMA IP. > And the native HDMA registers are different from eDMA, > so this patch add support for HDMA NATIVE mode. > > HDMA write and read channels operate independently to maximize > the performance of the HDMA read and write data transfer over > the link When you configure the HDMA with multiple read channels, > then it uses a round robin (RR) arbitration scheme to select > the next read channel to be serviced.The same applies when > youhave multiple write channels. > > The native HDMA driver also supports a maximum of 16 independent > channels (8 write + 8 read), which can run simultaneously. > Both SAR (Source Address Register) and DAR (Destination Address Register) > are aligned to byte. > > Cai Huoqing (1): > dmaengine: dw-edma: Add support for native HDMA > > Cai huoqing (3): > dmaengine: dw-edma: Rename dw_edma_core_ops structure to > dw_edma_plat_ops > dmaengine: dw-edma: Create a new dw_edma_core_ops structure to > abstract controller operation > dmaengine: dw-edma: Add HDMA DebugFS support > > v7->v8: > 1.Remove the [5/5] patch in v7. > [3/4] > 2.Get back the static methods: dw_hdma_v0_core_clear_done_int(), > dw_hdma_v0_core_clear_abort_int() and dw_hdma_v0_core_status_int(). > [4/4] > 3.Drop some unused field in dw_hdma_debugfs_entry. The whole series looking good now except a few nitpicks which can be fixed should v9 is required (see patches #3 and #4). I've got the patchset tested on DW PCIe Root Port v4.60a with eDMA engine embedded. A dummy read/write DMA-streams from/to a remote PCIe VGA adapter memory was performed as expected. So feel free to add to the entire series: Tested-by: Serge Semin <fancer.lancer@xxxxxxxxx> -Serge(y) > > v7 link: > https://lore.kernel.org/lkml/20230315012840.6986-1-cai.huoqing@xxxxxxxxx/ > > drivers/dma/dw-edma/Makefile | 8 +- > drivers/dma/dw-edma/dw-edma-core.c | 86 ++---- > drivers/dma/dw-edma/dw-edma-core.h | 58 ++++ > drivers/dma/dw-edma/dw-edma-pcie.c | 4 +- > drivers/dma/dw-edma/dw-edma-v0-core.c | 85 +++++- > drivers/dma/dw-edma/dw-edma-v0-core.h | 14 +- > drivers/dma/dw-edma/dw-hdma-v0-core.c | 296 +++++++++++++++++++ > drivers/dma/dw-edma/dw-hdma-v0-core.h | 17 ++ > drivers/dma/dw-edma/dw-hdma-v0-debugfs.c | 173 +++++++++++ > drivers/dma/dw-edma/dw-hdma-v0-debugfs.h | 22 ++ > drivers/dma/dw-edma/dw-hdma-v0-regs.h | 130 ++++++++ > drivers/pci/controller/dwc/pcie-designware.c | 2 +- > include/linux/dma/edma.h | 7 +- > 13 files changed, 811 insertions(+), 91 deletions(-) > create mode 100644 drivers/dma/dw-edma/dw-hdma-v0-core.c > create mode 100644 drivers/dma/dw-edma/dw-hdma-v0-core.h > create mode 100644 drivers/dma/dw-edma/dw-hdma-v0-debugfs.c > create mode 100644 drivers/dma/dw-edma/dw-hdma-v0-debugfs.h > create mode 100644 drivers/dma/dw-edma/dw-hdma-v0-regs.h > > -- > 2.34.1 >
