On 3/22/2021 10:29 AM, Sanjay R Mehta wrote: > From: Sanjay R Mehta <sanju.mehta@xxxxxxx> > > This patch series add support for AMD PTDMA controller which > performs high bandwidth memory-to-memory and IO copy operation, > performs DMA transfer through queue based descriptor management. > > AMD Processor has multiple ptdma device instances with each controller > having single queue. The driver also adds support for for multiple PTDMA > instances, each device will get an unique identifier and uniquely > named resources. > > v8: > - splitted the code into different functions, one to find active desc > and second to complete and invoke callback. > - used FIELD_PREP & FIELD_GET instead of union struct bitfields. > - modified all style fixes as per the comments. > > v7: > - Fixed module warnings reported ( by kernel test robot <lkp@xxxxxxxxx> ). > > v6: > - Removed debug artifacts and made the suggested cosmetic changes. > - implemented and used to_pt_chan and to_pt_desc inline functions. > - Removed src and dst address check as framework does this. > - Removed devm_kcalloc() usage and used devm_kzalloc() api. > - Using framework debugfs directory to store dma info. > > v5: > - modified code to submit next tranction in ISR itself and removed the tasklet. > - implemented .device_synchronize API. > - converted debugfs code by using DEFINE_SHOW_ATTRIBUTE() > - using dbg_dev_root for debugfs root directory. > - removed dma_status from pt_dma_chan > - removed module parameter cmd_queue_lenght. > - removed global device list for multiple devics. > - removed code related to dynamic adding/deleting to device list > - removed pt_add_device and pt_del_device functions > > v4: > - modified DMA channel and descriptor management using virt-dma layer > instead of list based management. > - return only status of the cookie from pt_tx_status > - copyright year changed from 2019 to 2020 > - removed dummy code for suspend & resume > - used bitmask and genmask > > v3: > - Fixed the sparse warnings. > > v2: > - Added controller description in cover letter > - Removed "default m" from Kconfig > - Replaced low_address() and high_address() functions with kernel > API's lower_32_bits & upper_32_bits(). > - Removed the BH handler function pt_core_irq_bh() and instead > handling transaction in irq handler itself. > - Moved presetting of command queue registers into new function > "init_cmdq_regs()" > - Removed the kernel thread dependency to submit transaction. > - Increased the hardware command queue size to 32 and adding it > as a module parameter. > - Removed backlog command queue handling mechanism. > - Removed software command queue handling and instead submitting > transaction command directly to > hardware command queue. > - Added tasklet structure variable in "struct pt_device". > This is used to invoke pt_do_cmd_complete() upon receiving interrupt > for command completion. > - pt_core_perform_passthru() function parameters are modified and it is > now used to submit command directly to hardware from dmaengine framew > - Removed below structures, enums, macros and functions, as these value > constants. Making command submission simple, > - Removed "union pt_function" and several macros like PT_VERSION, > PT_BYTESWAP, PT_CMD_* etc.. > - enum pt_passthru_bitwise, enum pt_passthru_byteswap, enum pt_memty > struct pt_dma_info, struct pt_data, struct pt_mem, struct pt_passt > struct pt_op, > > Links of the review comments for v7: > 1. https://lkml.org/lkml/2020/11/18/351 > 2. https://lkml.org/lkml/2020/11/18/384 > > Links of the review comments for v5: > 1. https://lkml.org/lkml/2020/7/3/154 > 2. https://lkml.org/lkml/2020/8/25/431 > 3. https://lkml.org/lkml/2020/7/3/177 > 4. https://lkml.org/lkml/2020/7/3/186 > > Links of the review comments for v5: > 1. https://lkml.org/lkml/2020/5/4/42 > 2. https://lkml.org/lkml/2020/5/4/45 > 3. https://lkml.org/lkml/2020/5/4/38 > 4. https://lkml.org/lkml/2020/5/26/70 > > Links of the review comments for v4: > 1. https://lkml.org/lkml/2020/1/24/12 > 2. https://lkml.org/lkml/2020/1/24/17 > > Links of the review comments for v2: > 1https://lkml.org/lkml/2019/12/27/630 > 2. https://lkml.org/lkml/2020/1/3/23 > 3. https://lkml.org/lkml/2020/1/3/314 > 4. https://lkml.org/lkml/2020/1/10/100 > > Links of the review comments for v1: > 1. https://lkml.org/lkml/2019/9/24/490 > 2. https://lkml.org/lkml/2019/9/24/399 > 3. https://lkml.org/lkml/2019/9/24/862 > 4. https://lkml.org/lkml/2019/9/24/122 > > Sanjay R Mehta (3): > dmaengine: ptdma: Initial driver for the AMD PTDMA > dmaengine: ptdma: register PTDMA controller as a DMA resource > dmaengine: ptdma: Add debugfs entries for PTDMA > > MAINTAINERS | 6 + > drivers/dma/Kconfig | 2 + > drivers/dma/Makefile | 1 + > drivers/dma/ptdma/Kconfig | 13 + > drivers/dma/ptdma/Makefile | 10 + > drivers/dma/ptdma/ptdma-debugfs.c | 115 +++++++++ > drivers/dma/ptdma/ptdma-dev.c | 327 ++++++++++++++++++++++++ > drivers/dma/ptdma/ptdma-dmaengine.c | 480 ++++++++++++++++++++++++++++++++++++ > drivers/dma/ptdma/ptdma-pci.c | 251 +++++++++++++++++++ > drivers/dma/ptdma/ptdma.h | 342 +++++++++++++++++++++++++ > 10 files changed, 1547 insertions(+) > create mode 100644 drivers/dma/ptdma/Kconfig > create mode 100644 drivers/dma/ptdma/Makefile > create mode 100644 drivers/dma/ptdma/ptdma-debugfs.c > create mode 100644 drivers/dma/ptdma/ptdma-dev.c > create mode 100644 drivers/dma/ptdma/ptdma-dmaengine.c > create mode 100644 drivers/dma/ptdma/ptdma-pci.c > create mode 100644 drivers/dma/ptdma/ptdma.h > Hi Vinod, Any comments on this patch series? Thanks, Sanjay
