On 7/22/2021 7:40 PM, Vinod Koul wrote: > [CAUTION: External Email] > > On 22-07-21, 19:27, Sanjay R Mehta wrote: >> >> >> On 6/20/2021 10:11 PM, 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. >>> >>> v10: >>> - modified ISR to return IR_HANDLED only in non-error condition. >>> - removed unnecessary prints, variables and made some cosmetic changes. >>> - removed pt_ordinal atomic variable and instead using dev_name() >>> for device name. >>> - removed the cmdlist dependency and instead using vc.desc_issued list. >>> - freeing the desc and list which was missing in the pt_terminate_all() >>> funtion. >>> - Added comment for marking PTDMA as DMA_PRIVATE. >>> - removed unused pt_debugfs_lock from debufs code. >>> - keeping same file permision for all the debug directoris. >>> >>> v9: >>> - Modified the help message in Kconfig as per Randy's comment. >>> - reverted the split of code for "pt_handle_active_desc" as there >>> was driver hang being observerd after few iterations. >>> >>> 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 v10: >>> 1. https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flkml.org%2Flkml%2F2021%2F6%2F8%2F976&data=04%7C01%7CSanju.Mehta%40amd.com%7C775e5c3c08a24a2a7dc608d94d1a67e3%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637625598082849269%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=WeGA5LwGm9mnQ594VpBPAbUGZXkLZ4oup1T77fJoitc%3D&reserved=0 >>> 2. 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https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flkml.org%2Flkml%2F2020%2F1%2F10%2F100&data=04%7C01%7CSanju.Mehta%40amd.com%7C775e5c3c08a24a2a7dc608d94d1a67e3%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637625598082869186%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=mDUnVUEREIpoUeYUeACYMQSzAon4t9652Uj4PQCrwPQ%3D&reserved=0 >>> >>> Links of the review comments for v1: >>> 1. https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flkml.org%2Flkml%2F2019%2F9%2F24%2F490&data=04%7C01%7CSanju.Mehta%40amd.com%7C775e5c3c08a24a2a7dc608d94d1a67e3%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637625598082869186%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=MvwpsDwevzgU8Qn3zc29u8hjhFBZIAFZJy7lSYcegnQ%3D&reserved=0 >>> 2. https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flkml.org%2Flkml%2F2019%2F9%2F24%2F399&data=04%7C01%7CSanju.Mehta%40amd.com%7C775e5c3c08a24a2a7dc608d94d1a67e3%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637625598082869186%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=6v6SMJY%2BY6RfGty9QxG72fsQ%2BV7NfJm%2B8Dh3cVIx%2BtQ%3D&reserved=0 >>> 3. https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flkml.org%2Flkml%2F2019%2F9%2F24%2F862&data=04%7C01%7CSanju.Mehta%40amd.com%7C775e5c3c08a24a2a7dc608d94d1a67e3%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637625598082869186%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=7cY3MBVmXSQ40wVpdVWDDYqTV3Z%2FzCB0j%2ByNeiIO3FA%3D&reserved=0 >>> 4. https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flkml.org%2Flkml%2F2019%2F9%2F24%2F122&data=04%7C01%7CSanju.Mehta%40amd.com%7C775e5c3c08a24a2a7dc608d94d1a67e3%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637625598082869186%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=IoLPSuBMdz8T8Qyyknb2%2FJzzV8o62BqzkrQ6kirzOIM%3D&reserved=0 >>> >>> 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 | 110 ++++++++++ >>> drivers/dma/ptdma/ptdma-dev.c | 327 ++++++++++++++++++++++++++++++ >>> drivers/dma/ptdma/ptdma-dmaengine.c | 389 ++++++++++++++++++++++++++++++++++++ >>> drivers/dma/ptdma/ptdma-pci.c | 245 +++++++++++++++++++++++ >>> drivers/dma/ptdma/ptdma.h | 334 +++++++++++++++++++++++++++++++ >>> 10 files changed, 1437 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, Greg, >> >> >> I had re-sent this patch series as per your advice a month ago with all >> the review feedback's addressed. >> >> Need your guidance and feedback to get this code reviewed and up-streamed. > > This was sent during the merge window... and right now this is in my > review queue and will be addressed shortly. > Ok sure. Thank you! > -- > ~Vinod >
