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[75.142.250.213]) by smtp.gmail.com with ESMTPSA id n11sm5822763qtx.45.2021.09.14.06.27.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 14 Sep 2021 06:27:34 -0700 (PDT) Subject: Re: [PATCH V9 XRT Alveo 04/14] fpga: xrt: xrt-lib driver manager To: Lizhi Hou , Moritz Fischer , "Wu, Hao" , Greg KH Cc: linux-kernel@vger.kernel.org, linux-fpga@vger.kernel.org, maxz@xilinx.com, sonal.santan@xilinx.com, yliu@xilinx.com, michal.simek@xilinx.com, stefanos@xilinx.com, devicetree@vger.kernel.org, robh@kernel.org, Max Zhen References: <20210802160521.331031-1-lizhi.hou@xilinx.com> <20210802160521.331031-5-lizhi.hou@xilinx.com> <9a214e25-65b3-586d-13b6-e37a380dc10e@redhat.com> From: Tom Rix Message-ID: <14eb61e8-2a97-5d6a-7bbc-51aac882f3d9@redhat.com> Date: Tue, 14 Sep 2021 06:27:30 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/10/21 2:34 PM, Lizhi Hou wrote: > Hi Moritz, > > (sending it again because rejected by some mail alias) > > > Did you get time to review XRT patch set? Please let us know if there > are more we need to change. > We are looking for your comments. This patchset has been outstanding for 6 weeks to address Moritz' comments for the v8 patchset of this single patch 4 of 14. The changes look good to me. https://lore.kernel.org/linux-fpga/9a214e25-65b3-586d-13b6-e37a380dc10e@redhat.com/ Moritz, can you review the changes ? The xrt patchset starts to enable a whole class of general purpose datacenter fpga's. https://www.xilinx.com/products/boards-and-kits/alveo.html This would be a great feature for the fpga/ subsystem. Tom > > Thanks, > Lizhi > > On 8/21/21 9:44 AM, Moritz Fischer wrote: >> CAUTION: This message has originated from an External Source. Please >> use proper judgment and caution when opening attachments, clicking >> links, or responding to this email. >> >> >> On Thu, Aug 19, 2021 at 05:14:14AM -0700, Tom Rix wrote: >>> On 8/2/21 9:05 AM, Lizhi Hou wrote: >>> >>>> xrt-lib kernel module infrastructure code to register and manage all >>>> leaf driver modules. >>>> >>>> Signed-off-by: Sonal Santan >>>> Signed-off-by: Max Zhen >>>> Signed-off-by: Lizhi Hou >>>> Reviewed-by: Tom Rix >>> This was the only patch with requested changes in v8. >>> >>> All the changes from v8 have been made. >>> >>> They are itemized below with variations on 'ok' >>> >>> It is still Moritz's call to accept them. >> I'll be OOO till 9/4/21. I'll get to it after. >> >> - Moritz >>> Tom >>> >>>> --- >>>>    drivers/fpga/xrt/include/subdev_id.h          |  39 +++ >>>>    drivers/fpga/xrt/include/xdevice.h            | 141 ++++++++ >>>>    drivers/fpga/xrt/include/xleaf.h              | 205 +++++++++++ >>>>    drivers/fpga/xrt/include/xleaf/clkfreq.h      |  21 ++ >>>>    drivers/fpga/xrt/include/xleaf/clock.h        |  29 ++ >>>>    .../fpga/xrt/include/xleaf/ddr_calibration.h  |  28 ++ >>>>    drivers/fpga/xrt/include/xleaf/devctl.h       |  40 +++ >>>>    drivers/fpga/xrt/lib/lib-drv.c                | 318 >>>> ++++++++++++++++++ >>>>    drivers/fpga/xrt/lib/lib-drv.h                |  21 ++ >>>>    9 files changed, 842 insertions(+) >>>>    create mode 100644 drivers/fpga/xrt/include/subdev_id.h >>>>    create mode 100644 drivers/fpga/xrt/include/xdevice.h >>>>    create mode 100644 drivers/fpga/xrt/include/xleaf.h >>>>    create mode 100644 drivers/fpga/xrt/include/xleaf/clkfreq.h >>>>    create mode 100644 drivers/fpga/xrt/include/xleaf/clock.h >>>>    create mode 100644 drivers/fpga/xrt/include/xleaf/ddr_calibration.h >>>>    create mode 100644 drivers/fpga/xrt/include/xleaf/devctl.h >>>>    create mode 100644 drivers/fpga/xrt/lib/lib-drv.c >>>>    create mode 100644 drivers/fpga/xrt/lib/lib-drv.h >>>> >>>> diff --git a/drivers/fpga/xrt/include/subdev_id.h >>>> b/drivers/fpga/xrt/include/subdev_id.h >>>> new file mode 100644 >>>> index 000000000000..02df4b939a1b >>>> --- /dev/null >>>> +++ b/drivers/fpga/xrt/include/subdev_id.h >>>> @@ -0,0 +1,39 @@ >>>> +/* SPDX-License-Identifier: GPL-2.0 */ >>>> +/* >>>> + * Copyright (C) 2020-2021 Xilinx, Inc. >>>> + * >>>> + * Authors: >>>> + * Cheng Zhen >>>> + */ >>>> + >>>> +#ifndef _XRT_SUBDEV_ID_H_ >>>> +#define _XRT_SUBDEV_ID_H_ >>>> + >>>> +/* >>>> + * Every subdev driver has an ID for others to refer to it. There >>>> can be multiple number of >>>> + * instances of a subdev driver. A >>>> tuple is a unique identification >>>> + * of a specific instance of a subdev driver. >>>> + */ >>>> +enum xrt_subdev_id { >>>> +   XRT_SUBDEV_INVALID = 0, >>>> +   XRT_SUBDEV_GRP, >>>> +   XRT_SUBDEV_VSEC, >>>> +   XRT_SUBDEV_VSEC_GOLDEN, >>>> +   XRT_SUBDEV_DEVCTL, >>>> +   XRT_SUBDEV_AXIGATE, >>>> +   XRT_SUBDEV_ICAP, >>>> +   XRT_SUBDEV_TEST, >>>> +   XRT_SUBDEV_MGMT_MAIN, >>>> +   XRT_SUBDEV_QSPI, >>>> +   XRT_SUBDEV_MAILBOX, >>>> +   XRT_SUBDEV_CMC, >>>> +   XRT_SUBDEV_CALIB, >>>> +   XRT_SUBDEV_CLKFREQ, >>>> +   XRT_SUBDEV_CLOCK, >>>> +   XRT_SUBDEV_SRSR, >>>> +   XRT_SUBDEV_UCS, >>>> +   XRT_SUBDEV_NUM, /* Total number of subdevs. */ >>>> +   XRT_ROOT = -1, /* Special ID for root driver. */ >>>> +}; >>>> + >>>> +#endif     /* _XRT_SUBDEV_ID_H_ */ >>>> diff --git a/drivers/fpga/xrt/include/xdevice.h >>>> b/drivers/fpga/xrt/include/xdevice.h >>>> new file mode 100644 >>>> index 000000000000..b40ebe98b54d >>>> --- /dev/null >>>> +++ b/drivers/fpga/xrt/include/xdevice.h >>>> @@ -0,0 +1,141 @@ >>>> +/* SPDX-License-Identifier: GPL-2.0 */ >>>> +/* >>>> + * Copyright (C) 2020-2021 Xilinx, Inc. >>>> + * >>>> + * Authors: >>>> + *    Lizhi Hou >>>> + */ >>>> + >>>> +#ifndef _XRT_DEVICE_H_ >>>> +#define _XRT_DEVICE_H_ >>>> + >>>> +#include >>>> +#include >>>> + >>>> +#define XRT_MAX_DEVICE_NODES               128 >>>> +#define XRT_INVALID_DEVICE_INST (XRT_MAX_DEVICE_NODES + 1) >>>> + >>>> +enum { >>>> +   XRT_DEVICE_STATE_NONE = 0, >>>> +   XRT_DEVICE_STATE_ADDED >>>> +}; >>>> + >>>> +/* >>>> + * struct xrt_device - represent an xrt device on xrt bus >>>> + * >>>> + * dev: generic device interface. >>>> + * subdev_id: id of the xrt device. See enum xrt_subdev_id. >>> ok >>>> + * name: name of the xrt device. >>>> + * instance: instance of the xrt device. The xrt device with same >>>> id can have >>>> + *           more than 1 instances. >>>> + * state: current state of the xrt device. >>>> + * num_resources: The total number of resource for the xrt device. >>>> + * resource: point to the xrt device resource array. >>>> + * sdev_data: private data pointer. >>>> + */ >>>> +struct xrt_device { >>>> +   struct device dev; >>>> +   u32 subdev_id; >>>> +   const char *name; >>>> +   u32 instance; >>>> +   u32 state; >>>> +   u32 num_resources; >>>> +   struct resource *resource; >>>> +   void *sdev_data; >>>> +}; >>>> + >>>> +/* >>>> + * If populated by xrt device driver, infra will handle the >>>> mechanics of >>>> + * char device (un)registration. >>>> + */ >>>> +enum xrt_dev_file_mode { >>>> +   /* Infra create cdev, default file name */ >>>> +   XRT_DEV_FILE_DEFAULT = 0, >>>> +   /* Infra create cdev, need to encode inst num in file name */ >>>> +   XRT_DEV_FILE_MULTI_INST, >>>> +   /* No auto creation of cdev by infra, leaf handles it by itself */ >>>> +   XRT_DEV_FILE_NO_AUTO, >>>> +}; >>>> + >>>> +struct xrt_dev_file_ops { >>>> +   const struct file_operations xsf_ops; >>>> +   dev_t xsf_dev_t; >>>> +   const char *xsf_dev_name; >>>> +   enum xrt_dev_file_mode xsf_mode; >>>> +}; >>>> + >>>> +/* >>>> + * this struct define the endpoints belong to the same xrt device >>>> + * ep_name: endpoint name >>>> + * compat: compatible string >>> ok >>>> + */ >>>> +struct xrt_dev_ep_names { >>>> +   const char *ep_name; >>>> +   const char *compat; >>>> +}; >>>> + >>>> +struct xrt_dev_endpoints { >>>> +   struct xrt_dev_ep_names *xse_names; >>>> +   /* minimum number of endpoints to support the subdevice */ >>>> +   u32 xse_min_ep; >>>> +}; >>>> + >>>> +/* >>>> + * struct xrt_driver - represent a xrt device driver >>>> + * >>>> + * driver: driver model structure. >>>> + * subdev_id: id of the xrt device. See enum xrt_subdev_id. >>>> + * file_ops: character device name and callbacks. >>>> + * probe: mandatory callback for device binding. >>>> + * remove: callback for device unbinding. >>>> + * leaf_call: callback for servicing other leaf drivers. >>> ok >>>> + */ >>>> +struct xrt_driver { >>>> +   struct device_driver driver; >>>> +   u32 subdev_id; >>>> +   struct xrt_dev_file_ops file_ops; >>>> +   struct xrt_dev_endpoints *endpoints; >>>> + >>>> +   /* >>>> +    * Subdev driver callbacks populated by subdev driver. >>>> +    */ >>>> +   int (*probe)(struct xrt_device *xrt_dev); >>>> +   void (*remove)(struct xrt_device *xrt_dev); >>>> +   /* >>>> +    * If leaf_call is defined, these are called by other leaf >>>> drivers. >>>> +    * Note that root driver may call into leaf_call of a group >>>> driver. >>>> +    */ >>>> +   int (*leaf_call)(struct xrt_device *xrt_dev, u32 cmd, void *arg); >>>> +}; >>>> + >>>> +#define to_xrt_dev(d) container_of(d, struct xrt_device, dev) >>>> +#define to_xrt_drv(d) container_of(d, struct xrt_driver, driver) >>>> + >>>> +static inline void *xrt_get_drvdata(const struct xrt_device *xdev) >>>> +{ >>>> +   return dev_get_drvdata(&xdev->dev); >>>> +} >>>> + >>>> +static inline void xrt_set_drvdata(struct xrt_device *xdev, void >>>> *data) >>>> +{ >>>> +   dev_set_drvdata(&xdev->dev, data); >>>> +} >>>> + >>>> +static inline void *xrt_get_xdev_data(struct device *dev) >>>> +{ >>>> +   struct xrt_device *xdev = to_xrt_dev(dev); >>>> + >>>> +   return xdev->sdev_data; >>>> +} >>>> + >>>> +struct xrt_device * >>>> +xrt_device_register(struct device *parent, u32 id, >>>> +               struct resource *res, u32 res_num, >>>> +               void *pdata, size_t data_sz); >>>> +void xrt_device_unregister(struct xrt_device *xdev); >>>> +int xrt_register_driver(struct xrt_driver *drv); >>>> +void xrt_unregister_driver(struct xrt_driver *drv); >>>> +void *xrt_get_xdev_data(struct device *dev); >>>> +struct resource *xrt_get_resource(struct xrt_device *xdev, u32 >>>> type, u32 num); >>>> + >>>> +#endif /* _XRT_DEVICE_H_ */ >>>> diff --git a/drivers/fpga/xrt/include/xleaf.h >>>> b/drivers/fpga/xrt/include/xleaf.h >>>> new file mode 100644 >>>> index 000000000000..f065fc766e0f >>>> --- /dev/null >>>> +++ b/drivers/fpga/xrt/include/xleaf.h >>>> @@ -0,0 +1,205 @@ >>>> +/* SPDX-License-Identifier: GPL-2.0 */ >>>> +/* >>>> + * Copyright (C) 2020-2021 Xilinx, Inc. >>>> + * >>>> + * Authors: >>>> + *    Cheng Zhen >>>> + *    Sonal Santan >>>> + */ >>>> + >>>> +#ifndef _XRT_XLEAF_H_ >>>> +#define _XRT_XLEAF_H_ >>>> + >>>> +#include >>>> +#include "xdevice.h" >>>> +#include "subdev_id.h" >>>> +#include "xroot.h" >>>> +#include "events.h" >>>> + >>>> +/* All subdev drivers should use below common routines to print >>>> out msg. */ >>>> +#define DEV(xdev)  (&(xdev)->dev) >>>> +#define DEV_PDATA(xdev) \ >>>> +   ((struct xrt_subdev_platdata *)xrt_get_xdev_data(DEV(xdev))) >>>> +#define DEV_FILE_OPS(xdev)                         \ >>>> +   (&(to_xrt_drv((xdev)->dev.driver))->file_ops) >>>> +#define FMT_PRT(prt_fn, xdev, fmt, args...) \ >>>> +   ({typeof(xdev) (_xdev) = (xdev);                \ >>>> +   prt_fn(DEV(_xdev), "%s %s: " fmt,               \ >>>> +   DEV_PDATA(_xdev)->xsp_root_name, __func__, ##args); }) >>>> +#define xrt_err(xdev, fmt, args...) FMT_PRT(dev_err, xdev, fmt, >>>> ##args) >>>> +#define xrt_warn(xdev, fmt, args...) FMT_PRT(dev_warn, xdev, fmt, >>>> ##args) >>>> +#define xrt_info(xdev, fmt, args...) FMT_PRT(dev_info, xdev, fmt, >>>> ##args) >>>> +#define xrt_dbg(xdev, fmt, args...) FMT_PRT(dev_dbg, xdev, fmt, >>>> ##args) >>>> + >>>> +#define XRT_DEFINE_REGMAP_CONFIG(config_name) \ >>>> +   static const struct regmap_config config_name = {               \ >>>> +           .reg_bits = 32,                                         \ >>>> +           .val_bits = 32,                                         \ >>>> +           .reg_stride = 4,                                        \ >>>> +           .max_register = 0x1000,                                 \ >>>> +   } >>>> + >>>> +enum { >>>> +   /* Starting cmd for common leaf cmd implemented by all leaves. */ >>>> +   XRT_XLEAF_COMMON_BASE = 0, >>>> +   /* Starting cmd for leaves' specific leaf cmds. */ >>>> +   XRT_XLEAF_CUSTOM_BASE = 64, >>>> +}; >>>> + >>>> +enum xrt_xleaf_common_leaf_cmd { >>>> +   XRT_XLEAF_EVENT = XRT_XLEAF_COMMON_BASE, >>>> +}; >>>> + >>>> +/* >>>> + * Partially initialized by the parent driver, then, passed in as >>>> subdev driver's >>>> + * platform data when creating subdev driver instance by calling >>>> platform >>>> + * device register API (xrt_device_register_data() or the likes). >>>> + * >>>> + * Once device register API returns, platform driver framework >>>> makes a copy of >>>> + * this buffer and maintains its life cycle. The content of the >>>> buffer is >>>> + * completely owned by subdev driver. >>>> + * >>>> + * Thus, parent driver should be very careful when it touches this >>>> buffer >>>> + * again once it's handed over to subdev driver. And the data >>>> structure >>>> + * should not contain pointers pointing to buffers that is managed by >>>> + * other or parent drivers since it could have been freed before >>>> platform >>>> + * data buffer is freed by platform driver framework. >>>> + */ >>>> +struct xrt_subdev_platdata { >>>> +   /* >>>> +    * Per driver instance callback. The xdev points to the instance. >>>> +    * Should always be defined for subdev driver to get service >>>> from root. >>>> +    */ >>>> +   xrt_subdev_root_cb_t xsp_root_cb; >>>> +   void *xsp_root_cb_arg; >>>> + >>>> +   /* Something to associate w/ root for msg printing. */ >>>> +   const char *xsp_root_name; >>>> + >>>> +   /* >>>> +    * Char dev support for this subdev instance. >>>> +    * Initialized by subdev driver. >>>> +    */ >>>> +   struct cdev xsp_cdev; >>>> +   struct device *xsp_sysdev; >>>> +   struct mutex xsp_devnode_lock; /* devnode lock */ >>>> +   struct completion xsp_devnode_comp; >>>> +   int xsp_devnode_ref; >>>> +   bool xsp_devnode_online; >>>> +   bool xsp_devnode_excl; >>>> + >>>> +   /* >>>> +    * Subdev driver specific init data. The buffer should be embedded >>>> +    * in this data structure buffer after dtb, so that it can be >>>> freed >>>> +    * together with platform data. >>>> +    */ >>>> +   loff_t xsp_priv_off; /* Offset into this platform data buffer. */ >>>> +   size_t xsp_priv_len; >>>> + >>>> +   /* >>>> +    * Populated by parent driver to describe the device tree for >>>> +    * the subdev driver to handle. Should always be last one since >>>> it's >>>> +    * of variable length. >>>> +    */ >>>> +   bool xsp_dtb_valid; >>>> +   char xsp_dtb[0]; >>>> +}; >>>> + >>>> +struct subdev_match_arg { >>>> +   enum xrt_subdev_id id; >>>> +   int instance; >>>> +}; >>>> + >>>> +bool xleaf_has_endpoint(struct xrt_device *xdev, const char >>>> *endpoint_name); >>>> +struct xrt_device *xleaf_get_leaf(struct xrt_device *xdev, >>>> +                             xrt_subdev_match_t cb, void *arg); >>>> + >>>> +static inline bool subdev_match(enum xrt_subdev_id id, struct >>>> xrt_device *xdev, void *arg) >>>> +{ >>>> +   const struct subdev_match_arg *a = (struct subdev_match_arg *)arg; >>>> +   int instance = a->instance; >>>> + >>>> +   if (id != a->id) >>>> +           return false; >>>> +   if (instance != xdev->instance && instance != >>>> XRT_INVALID_DEVICE_INST) >>>> +           return false; >>>> +   return true; >>>> +} >>>> + >>>> +static inline bool xrt_subdev_match_epname(enum xrt_subdev_id id, >>>> +                                      struct xrt_device *xdev, >>>> void *arg) >>>> +{ >>>> +   return xleaf_has_endpoint(xdev, arg); >>>> +} >>>> + >>>> +static inline struct xrt_device * >>>> +xleaf_get_leaf_by_id(struct xrt_device *xdev, >>>> +                enum xrt_subdev_id id, int instance) >>>> +{ >>>> +   struct subdev_match_arg arg = { id, instance }; >>>> + >>>> +   return xleaf_get_leaf(xdev, subdev_match, &arg); >>>> +} >>>> + >>>> +static inline struct xrt_device * >>>> +xleaf_get_leaf_by_epname(struct xrt_device *xdev, const char *name) >>>> +{ >>>> +   return xleaf_get_leaf(xdev, xrt_subdev_match_epname, (void >>>> *)name); >>>> +} >>>> + >>>> +static inline int xleaf_call(struct xrt_device *tgt, u32 cmd, void >>>> *arg) >>>> +{ >>>> +   return (to_xrt_drv(tgt->dev.driver)->leaf_call)(tgt, cmd, arg); >>>> +} >>>> + >>>> +int xleaf_broadcast_event(struct xrt_device *xdev, enum xrt_events >>>> evt, bool async); >>>> +int xleaf_create_group(struct xrt_device *xdev, char *dtb); >>>> +int xleaf_destroy_group(struct xrt_device *xdev, int instance); >>>> +void xleaf_get_root_res(struct xrt_device *xdev, u32 region_id, >>>> struct resource **res); >>>> +void xleaf_get_root_id(struct xrt_device *xdev, unsigned short >>>> *vendor, unsigned short *device, >>>> +                  unsigned short *subvendor, unsigned short >>>> *subdevice); >>>> +void xleaf_hot_reset(struct xrt_device *xdev); >>>> +int xleaf_put_leaf(struct xrt_device *xdev, struct xrt_device *leaf); >>>> +struct device *xleaf_register_hwmon(struct xrt_device *xdev, const >>>> char *name, void *drvdata, >>>> +                               const struct attribute_group **grps); >>>> +void xleaf_unregister_hwmon(struct xrt_device *xdev, struct device >>>> *hwmon); >>>> +int xleaf_wait_for_group_bringup(struct xrt_device *xdev); >>>> + >>>> +/* >>>> + * Character device helper APIs for use by leaf drivers >>>> + */ >>>> +static inline bool xleaf_devnode_enabled(struct xrt_device *xdev) >>>> +{ >>>> +   return DEV_FILE_OPS(xdev)->xsf_ops.open; >>>> +} >>>> + >>>> +int xleaf_devnode_create(struct xrt_device *xdev, >>>> +                    const char *file_name, const char *inst_name); >>>> +void xleaf_devnode_destroy(struct xrt_device *xdev); >>>> + >>>> +struct xrt_device *xleaf_devnode_open_excl(struct inode *inode); >>>> +struct xrt_device *xleaf_devnode_open(struct inode *inode); >>>> +void xleaf_devnode_close(struct inode *inode); >>>> + >>>> +/* Module's init/fini routines for leaf driver in xrt-lib module */ >>>> +#define XRT_LEAF_INIT_FINI_FUNC(name) \ >>>> +void name##_leaf_init_fini(bool >>>> init)                                      \ >>>> +{                                                                  \ >>>> +   if (init) \ >>>> + xrt_register_driver(&xrt_##name##_driver); \ >>>> + else \ >>>> + xrt_unregister_driver(&xrt_##name##_driver); \ >>>> +} >>>> + >>>> +/* Module's init/fini routines for leaf driver in xrt-lib module */ >>>> +void group_leaf_init_fini(bool init); >>>> +void vsec_leaf_init_fini(bool init); >>>> +void devctl_leaf_init_fini(bool init); >>>> +void axigate_leaf_init_fini(bool init); >>>> +void icap_leaf_init_fini(bool init); >>>> +void calib_leaf_init_fini(bool init); >>>> +void clkfreq_leaf_init_fini(bool init); >>>> +void clock_leaf_init_fini(bool init); >>>> +void ucs_leaf_init_fini(bool init); >>>> + >>>> +#endif     /* _XRT_LEAF_H_ */ >>>> diff --git a/drivers/fpga/xrt/include/xleaf/clkfreq.h >>>> b/drivers/fpga/xrt/include/xleaf/clkfreq.h >>>> new file mode 100644 >>>> index 000000000000..005441d5df78 >>>> --- /dev/null >>>> +++ b/drivers/fpga/xrt/include/xleaf/clkfreq.h >>>> @@ -0,0 +1,21 @@ >>>> +/* SPDX-License-Identifier: GPL-2.0 */ >>>> +/* >>>> + * Copyright (C) 2020-2021 Xilinx, Inc. >>>> + * >>>> + * Authors: >>>> + * Lizhi Hou >>>> + */ >>>> + >>>> +#ifndef _XRT_CLKFREQ_H_ >>>> +#define _XRT_CLKFREQ_H_ >>>> + >>>> +#include "xleaf.h" >>>> + >>>> +/* >>>> + * CLKFREQ driver leaf calls. >>>> + */ >>>> +enum xrt_clkfreq_leaf_cmd { >>>> +   XRT_CLKFREQ_READ = XRT_XLEAF_CUSTOM_BASE, /* See comments in >>>> xleaf.h */ >>>> +}; >>>> + >>>> +#endif     /* _XRT_CLKFREQ_H_ */ >>>> diff --git a/drivers/fpga/xrt/include/xleaf/clock.h >>>> b/drivers/fpga/xrt/include/xleaf/clock.h >>>> new file mode 100644 >>>> index 000000000000..1379e24fa5d0 >>>> --- /dev/null >>>> +++ b/drivers/fpga/xrt/include/xleaf/clock.h >>>> @@ -0,0 +1,29 @@ >>>> +/* SPDX-License-Identifier: GPL-2.0 */ >>>> +/* >>>> + * Copyright (C) 2020-2021 Xilinx, Inc. >>>> + * >>>> + * Authors: >>>> + * Lizhi Hou >>>> + */ >>>> + >>>> +#ifndef _XRT_CLOCK_H_ >>>> +#define _XRT_CLOCK_H_ >>>> + >>>> +#include "xleaf.h" >>>> +#include >>>> + >>>> +/* >>>> + * CLOCK driver leaf calls. >>>> + */ >>>> +enum xrt_clock_leaf_cmd { >>>> +   XRT_CLOCK_SET = XRT_XLEAF_CUSTOM_BASE, /* See comments in >>>> xleaf.h */ >>>> +   XRT_CLOCK_GET, >>>> +   XRT_CLOCK_VERIFY, >>>> +}; >>>> + >>>> +struct xrt_clock_get { >>>> +   u16 freq; >>>> +   u32 freq_cnter; >>>> +}; >>>> + >>>> +#endif     /* _XRT_CLOCK_H_ */ >>>> diff --git a/drivers/fpga/xrt/include/xleaf/ddr_calibration.h >>>> b/drivers/fpga/xrt/include/xleaf/ddr_calibration.h >>>> new file mode 100644 >>>> index 000000000000..c44ae30f939a >>>> --- /dev/null >>>> +++ b/drivers/fpga/xrt/include/xleaf/ddr_calibration.h >>>> @@ -0,0 +1,28 @@ >>>> +/* SPDX-License-Identifier: GPL-2.0 */ >>>> +/* >>>> + * Copyright (C) 2020-2021 Xilinx, Inc. >>>> + * >>>> + * Authors: >>>> + * Cheng Zhen >>>> + */ >>>> + >>>> +#ifndef _XRT_DDR_CALIBRATION_H_ >>>> +#define _XRT_DDR_CALIBRATION_H_ >>>> + >>>> +#include "xleaf.h" >>>> +#include >>>> + >>>> +/* >>>> + * Memory calibration driver leaf calls. >>>> + */ >>>> +enum xrt_calib_results { >>>> +   XRT_CALIB_UNKNOWN = 0, >>>> +   XRT_CALIB_SUCCEEDED, >>>> +   XRT_CALIB_FAILED, >>>> +}; >>>> + >>>> +enum xrt_calib_leaf_cmd { >>>> +   XRT_CALIB_RESULT = XRT_XLEAF_CUSTOM_BASE, /* See comments in >>>> xleaf.h */ >>>> +}; >>>> + >>>> +#endif     /* _XRT_DDR_CALIBRATION_H_ */ >>>> diff --git a/drivers/fpga/xrt/include/xleaf/devctl.h >>>> b/drivers/fpga/xrt/include/xleaf/devctl.h >>>> new file mode 100644 >>>> index 000000000000..b97f3b6d9326 >>>> --- /dev/null >>>> +++ b/drivers/fpga/xrt/include/xleaf/devctl.h >>>> @@ -0,0 +1,40 @@ >>>> +/* SPDX-License-Identifier: GPL-2.0 */ >>>> +/* >>>> + * Copyright (C) 2020-2021 Xilinx, Inc. >>>> + * >>>> + * Authors: >>>> + * Lizhi Hou >>>> + */ >>>> + >>>> +#ifndef _XRT_DEVCTL_H_ >>>> +#define _XRT_DEVCTL_H_ >>>> + >>>> +#include "xleaf.h" >>>> + >>>> +/* >>>> + * DEVCTL driver leaf calls. >>>> + */ >>>> +enum xrt_devctl_leaf_cmd { >>>> +   XRT_DEVCTL_READ = XRT_XLEAF_CUSTOM_BASE, /* See comments in >>>> xleaf.h */ >>>> +}; >>>> + >>>> +enum xrt_devctl_id { >>>> +   XRT_DEVCTL_ROM_UUID = 0, >>>> +   XRT_DEVCTL_DDR_CALIB, >>>> +   XRT_DEVCTL_GOLDEN_VER, >>>> +   XRT_DEVCTL_MAX >>>> +}; >>>> + >>>> +struct xrt_devctl_rw { >>>> +   u32     xdr_id; >>>> +   void    *xdr_buf; >>>> +   u32     xdr_len; >>>> +   u32     xdr_offset; >>>> +}; >>>> + >>>> +struct xrt_devctl_intf_uuid { >>>> +   u32     uuid_num; >>>> +   uuid_t  *uuids; >>>> +}; >>>> + >>>> +#endif     /* _XRT_DEVCTL_H_ */ >>>> diff --git a/drivers/fpga/xrt/lib/lib-drv.c >>>> b/drivers/fpga/xrt/lib/lib-drv.c >>>> new file mode 100644 >>>> index 000000000000..7d21ef565651 >>>> --- /dev/null >>>> +++ b/drivers/fpga/xrt/lib/lib-drv.c >>>> @@ -0,0 +1,318 @@ >>>> +// SPDX-License-Identifier: GPL-2.0 >>>> +/* >>>> + * Copyright (C) 2020-2021 Xilinx, Inc. >>>> + * >>>> + * Authors: >>>> + * Cheng Zhen >>>> + * Lizhi Hou >>>> + */ >>>> + >>>> +#include >>>> +#include >>>> +#include >>>> +#include "xleaf.h" >>>> +#include "xroot.h" >>>> +#include "lib-drv.h" >>>> + >>>> +#define XRT_IPLIB_MODULE_NAME              "xrt-lib" >>> ok >>>> +#define XRT_DRVNAME(drv) ((drv)->driver.name) >>>> + >>>> +#define XRT_SUBDEV_ID_SHIFT                16 >>>> +#define XRT_SUBDEV_ID_MASK         ((1 << XRT_SUBDEV_ID_SHIFT) - 1) >>>> + >>>> +struct xrt_find_drv_data { >>>> +   enum xrt_subdev_id id; >>>> +   struct xrt_driver *xdrv; >>>> +}; >>>> + >>>> +struct class *xrt_class; >>>> +static DEFINE_IDA(xrt_device_ida); >>>> + >>>> +static inline u32 xrt_instance_to_id(enum xrt_subdev_id id, u32 >>>> instance) >>>> +{ >>>> +   return (id << XRT_SUBDEV_ID_SHIFT) | instance; >>>> +} >>>> + >>>> +static inline u32 xrt_id_to_instance(u32 id) >>>> +{ >>>> +   return id & XRT_SUBDEV_ID_MASK; >>> ok >>>> +} >>>> + >>>> +static int xrt_bus_match(struct device *dev, struct device_driver >>>> *drv) >>>> +{ >>>> +   struct xrt_device *xdev = to_xrt_dev(dev); >>>> +   struct xrt_driver *xdrv = to_xrt_drv(drv); >>>> + >>>> +   if (xdev->subdev_id == xdrv->subdev_id) >>>> +           return 1; >>>> + >>>> +   return 0; >>>> +} >>>> + >>>> +static int xrt_bus_probe(struct device *dev) >>>> +{ >>>> +   struct xrt_driver *xdrv = to_xrt_drv(dev->driver); >>>> +   struct xrt_device *xdev = to_xrt_dev(dev); >>>> + >>>> +   return xdrv->probe(xdev); >>>> +} >>>> + >>>> +static int xrt_bus_remove(struct device *dev) >>>> +{ >>>> +   struct xrt_driver *xdrv = to_xrt_drv(dev->driver); >>>> +   struct xrt_device *xdev = to_xrt_dev(dev); >>>> + >>>> +   if (xdrv->remove) >>>> +           xdrv->remove(xdev); >>>> + >>>> +   return 0; >>>> +} >>>> + >>>> +struct bus_type xrt_bus_type = { >>>> +   .name           = "xrt", >>>> +   .match          = xrt_bus_match, >>>> +   .probe          = xrt_bus_probe, >>>> +   .remove         = xrt_bus_remove, >>>> +}; >>>> + >>>> +int xrt_register_driver(struct xrt_driver *drv) >>>> +{ >>>> +   const char *drvname = XRT_DRVNAME(drv); >>>> +   int rc = 0; >>>> + >>>> +   /* Initialize dev_t for char dev node. */ >>>> +   if (drv->file_ops.xsf_ops.open) { >>>> +           rc = alloc_chrdev_region(&drv->file_ops.xsf_dev_t, 0, >>>> +                                    XRT_MAX_DEVICE_NODES, drvname); >>>> +           if (rc) { >>>> +                   pr_err("failed to alloc dev minor for %s: >>>> %d\n", drvname, rc); >>>> +                   return rc; >>>> +           } >>>> +   } else { >>>> +           drv->file_ops.xsf_dev_t = (dev_t)-1; >>>> +   } >>>> + >>>> +   drv->driver.owner = THIS_MODULE; >>>> +   drv->driver.bus = &xrt_bus_type; >>>> + >>>> +   rc = driver_register(&drv->driver); >>>> +   if (rc) { >>>> +           pr_err("register %s xrt driver failed\n", drvname); >>>> +           if (drv->file_ops.xsf_dev_t != (dev_t)-1) { >>>> + unregister_chrdev_region(drv->file_ops.xsf_dev_t, >>>> + XRT_MAX_DEVICE_NODES); >>>> +           } >>>> +           return rc; >>>> +   } >>>> + >>>> +   pr_info("%s registered successfully\n", drvname); >>>> + >>>> +   return 0; >>>> +} >>>> +EXPORT_SYMBOL_GPL(xrt_register_driver); >>>> + >>>> +void xrt_unregister_driver(struct xrt_driver *drv) >>>> +{ >>>> +   driver_unregister(&drv->driver); >>>> + >>>> +   if (drv->file_ops.xsf_dev_t != (dev_t)-1) >>>> + unregister_chrdev_region(drv->file_ops.xsf_dev_t, >>>> XRT_MAX_DEVICE_NODES); >>> ok >>>> +} >>>> +EXPORT_SYMBOL_GPL(xrt_unregister_driver); >>>> + >>>> +static int __find_driver(struct device_driver *drv, void *_data) >>>> +{ >>>> +   struct xrt_driver *xdrv = to_xrt_drv(drv); >>>> +   struct xrt_find_drv_data *data = _data; >>>> + >>>> +   if (xdrv->subdev_id == data->id) { >>>> +           data->xdrv = xdrv; >>>> +           return 1; >>>> +   } >>>> + >>>> +   return 0; >>>> +} >>>> + >>>> +const char *xrt_drv_name(enum xrt_subdev_id id) >>>> +{ >>>> +   struct xrt_find_drv_data data = { 0 }; >>>> + >>>> +   data.id = id; >>>> +   bus_for_each_drv(&xrt_bus_type, NULL, &data, __find_driver); >>>> + >>>> +   if (data.xdrv) >>>> +           return XRT_DRVNAME(data.xdrv); >>>> + >>>> +   return NULL; >>>> +} >>>> + >>>> +static int xrt_drv_get_instance(enum xrt_subdev_id id) >>>> +{ >>>> +   int ret; >>>> + >>>> +   ret = ida_alloc_range(&xrt_device_ida, xrt_instance_to_id(id, 0), >>>> +                         xrt_instance_to_id(id, >>>> XRT_MAX_DEVICE_NODES), >>>> +                         GFP_KERNEL); >>>> +   if (ret < 0) >>>> +           return ret; >>>> + >>>> +   return xrt_id_to_instance((u32)ret); >>>> +} >>>> + >>>> +static void xrt_drv_put_instance(enum xrt_subdev_id id, int instance) >>>> +{ >>>> +   ida_free(&xrt_device_ida, xrt_instance_to_id(id, instance)); >>>> +} >>>> + >>>> +struct xrt_dev_endpoints *xrt_drv_get_endpoints(enum xrt_subdev_id >>>> id) >>>> +{ >>>> +   struct xrt_find_drv_data data = { 0 }; >>>> + >>>> +   data.id = id; >>>> +   bus_for_each_drv(&xrt_bus_type, NULL, &data, __find_driver); >>>> + >>>> +   if (data.xdrv) >>>> +           return data.xdrv->endpoints; >>>> + >>>> +   return NULL; >>>> +} >>>> + >>>> +static void xrt_device_release(struct device *dev) >>>> +{ >>>> +   struct xrt_device *xdev = container_of(dev, struct xrt_device, >>>> dev); >>>> + >>>> +   kfree(xdev); >>>> +} >>>> + >>>> +void xrt_device_unregister(struct xrt_device *xdev) >>>> +{ >>>> +   if (xdev->state == XRT_DEVICE_STATE_ADDED) >>>> +           device_del(&xdev->dev); >>>> + >>>> +   vfree(xdev->sdev_data); >>> cleanup of sdev_data here >>> >>> fail: label in xrt_device_register is ok. >>> >>>> +   kfree(xdev->resource); >>>> + >>>> +   if (xdev->instance != XRT_INVALID_DEVICE_INST) >>>> +           xrt_drv_put_instance(xdev->subdev_id, xdev->instance); >>>> + >>>> +   if (xdev->dev.release == xrt_device_release) >>>> +           put_device(&xdev->dev); >>>> +} >>>> + >>>> +struct xrt_device * >>>> +xrt_device_register(struct device *parent, u32 id, >>>> +               struct resource *res, u32 res_num, >>>> +               void *pdata, size_t data_sz) >>>> +{ >>>> +   struct xrt_device *xdev = NULL; >>>> +   int ret; >>>> + >>>> +   xdev = kzalloc(sizeof(*xdev), GFP_KERNEL); >>>> +   if (!xdev) >>>> +           return xdev; >>> ok >>>> +   xdev->instance = XRT_INVALID_DEVICE_INST; >>>> + >>>> +   /* Obtain dev instance number. */ >>>> +   ret = xrt_drv_get_instance(id); >>>> +   if (ret < 0) { >>>> +           dev_err(parent, "failed get instance, ret %d", ret); >>>> +           goto fail; >>>> +   } >>>> + >>>> +   xdev->instance = ret; >>>> +   xdev->name = xrt_drv_name(id); >>>> +   xdev->subdev_id = id; >>>> +   device_initialize(&xdev->dev); >>>> +   xdev->dev.release = xrt_device_release; >>>> +   xdev->dev.parent = parent; >>>> + >>>> +   xdev->dev.bus = &xrt_bus_type; >>>> +   dev_set_name(&xdev->dev, "%s.%d", xdev->name, xdev->instance); >>>> + >>>> +   xdev->num_resources = res_num; >>>> +   xdev->resource = kmemdup(res, sizeof(*res) * res_num, GFP_KERNEL); >>>> +   if (!xdev->resource) >>>> +           goto fail; >>>> + >>>> +   xdev->sdev_data = vzalloc(data_sz); >>>> +   if (!xdev->sdev_data) >>>> +           goto fail; >>>> + >>>> +   memcpy(xdev->sdev_data, pdata, data_sz); >>>> + >>>> +   ret = device_add(&xdev->dev); >>>> +   if (ret) { >>>> +           dev_err(parent, "failed add device, ret %d", ret); >>>> +           goto fail; >>>> +   } >>>> +   xdev->state = XRT_DEVICE_STATE_ADDED; >>>> + >>>> +   return xdev; >>>> + >>>> +fail: >>>> +   xrt_device_unregister(xdev); >>>> +   kfree(xdev); >>>> + >>>> +   return NULL; >>>> +} >>>> + >>>> +struct resource *xrt_get_resource(struct xrt_device *xdev, u32 >>>> type, u32 num) >>>> +{ >>>> +   u32 i; >>>> + >>>> +   for (i = 0; i < xdev->num_resources; i++) { >>>> +           struct resource *r = &xdev->resource[i]; >>>> + >>>> +           if (type == resource_type(r) && num-- == 0) >>>> +                   return r; >>>> +   } >>>> +   return NULL; >>>> +} >>>> + >>>> +/* >>>> + * Leaf driver's module init/fini callbacks. This is not a open >>>> infrastructure for dynamic >>>> + * plugging in drivers. All drivers should be statically added. >>>> + */ >>>> +static void (*leaf_init_fini_cbs[])(bool) = { >>>> +   group_leaf_init_fini, >>>> +   axigate_leaf_init_fini, >>>> +   icap_leaf_init_fini, >>>> +}; >>>> + >>>> +static __init int xrt_lib_init(void) >>>> +{ >>>> +   int ret; >>>> +   int i; >>>> + >>>> +   ret = bus_register(&xrt_bus_type); >>>> +   if (ret) >>>> +           return ret; >>>> + >>>> +   xrt_class = class_create(THIS_MODULE, XRT_IPLIB_MODULE_NAME); >>>> +   if (IS_ERR(xrt_class)) { >>>> +           bus_unregister(&xrt_bus_type); >>>> +           return PTR_ERR(xrt_class); >>>> +   } >>>> + >>>> +   for (i = 0; i < ARRAY_SIZE(leaf_init_fini_cbs); i++) >>>> +           leaf_init_fini_cbs[i](true); >>>> +   return 0; >>>> +} >>>> + >>>> +static __exit void xrt_lib_fini(void) >>>> +{ >>>> +   int i; >>>> + >>>> +   for (i = 0; i < ARRAY_SIZE(leaf_init_fini_cbs); i++) >>>> +           leaf_init_fini_cbs[i](false); >>>> + >>>> +   class_destroy(xrt_class); >>>> +   bus_unregister(&xrt_bus_type); >>>> +} >>>> + >>>> +module_init(xrt_lib_init); >>>> +module_exit(xrt_lib_fini); >>>> + >>>> +MODULE_AUTHOR("XRT Team "); >>>> +MODULE_DESCRIPTION("Xilinx Alveo IP Lib driver"); >>>> +MODULE_LICENSE("GPL v2"); >>>> diff --git a/drivers/fpga/xrt/lib/lib-drv.h >>>> b/drivers/fpga/xrt/lib/lib-drv.h >>>> new file mode 100644 >>>> index 000000000000..0276c28e009f >>>> --- /dev/null >>>> +++ b/drivers/fpga/xrt/lib/lib-drv.h >>>> @@ -0,0 +1,21 @@ >>>> +/* SPDX-License-Identifier: GPL-2.0 */ >>>> +/* >>>> + * Copyright (C) 2020-2021 Xilinx, Inc. >>>> + * >>>> + * Authors: >>>> + * Cheng Zhen >>>> + */ >>>> + >>>> +#ifndef _LIB_DRV_H_ >>>> +#define _LIB_DRV_H_ >>>> + >>>> +#include >>>> +#include >>>> + >>>> +extern struct class *xrt_class; >>>> +extern struct bus_type xrt_bus_type; >>>> + >>>> +const char *xrt_drv_name(enum xrt_subdev_id id); >>>> +struct xrt_dev_endpoints *xrt_drv_get_endpoints(enum xrt_subdev_id >>>> id); >>>> + >>>> +#endif     /* _LIB_DRV_H_ */ >