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SubjectRe: [PATCH V9 XRT Alveo 04/14] fpga: xrt: xrt-lib driver manager
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 <sonal.santan@xilinx.com>
> > Signed-off-by: Max Zhen <max.zhen@xilinx.com>
> > Signed-off-by: Lizhi Hou <lizhi.hou@xilinx.com>
> > Reviewed-by: Tom Rix <trix@redhat.com>
>
> 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 <maxz@xilinx.com>
> > + */
> > +
> > +#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 <subdev_id, subdev_instance> 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 <lizhi.hou@xilinx.com>
> > + */
> > +
> > +#ifndef _XRT_DEVICE_H_
> > +#define _XRT_DEVICE_H_
> > +
> > +#include <linux/fs.h>
> > +#include <linux/cdev.h>
> > +
> > +#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 <maxz@xilinx.com>
> > + * Sonal Santan <sonal.santan@xilinx.com>
> > + */
> > +
> > +#ifndef _XRT_XLEAF_H_
> > +#define _XRT_XLEAF_H_
> > +
> > +#include <linux/mod_devicetable.h>
> > +#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 <Lizhi.Hou@xilinx.com>
> > + */
> > +
> > +#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 <Lizhi.Hou@xilinx.com>
> > + */
> > +
> > +#ifndef _XRT_CLOCK_H_
> > +#define _XRT_CLOCK_H_
> > +
> > +#include "xleaf.h"
> > +#include <linux/fpga_xrt.h>
> > +
> > +/*
> > + * 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 <maxz@xilinx.com>
> > + */
> > +
> > +#ifndef _XRT_DDR_CALIBRATION_H_
> > +#define _XRT_DDR_CALIBRATION_H_
> > +
> > +#include "xleaf.h"
> > +#include <linux/fpga-xrt.h>
> > +
> > +/*
> > + * 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 <Lizhi.Hou@xilinx.com>
> > + */
> > +
> > +#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 <maxz@xilinx.com>
> > + * Lizhi Hou <lizhi.hou@xilinx.com>
> > + */
> > +
> > +#include <linux/module.h>
> > +#include <linux/vmalloc.h>
> > +#include <linux/slab.h>
> > +#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 <runtime@xilinx.com>");
> > +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 <maxz@xilinx.com>
> > + */
> > +
> > +#ifndef _LIB_DRV_H_
> > +#define _LIB_DRV_H_
> > +
> > +#include <linux/device/class.h>
> > +#include <linux/device/bus.h>
> > +
> > +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_ */
>

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