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Mon, 26 Jul 2021 16:36:47 -0700 Envelope-to: robh@kernel.org, trix@redhat.com, devicetree@vger.kernel.org, linux-fpga@vger.kernel.org, linux-kernel@vger.kernel.org, mdf@kernel.org Received: from [10.17.2.60] (port=46786) by smtp.xilinx.com with esmtp (Exim 4.90) (envelope-from ) id 1m8A9P-00043I-FK; Mon, 26 Jul 2021 16:36:47 -0700 Subject: Re: [PATCH V8 XRT Alveo 04/14] fpga: xrt: xrt-lib driver manager To: Moritz Fischer , Lizhi Hou CC: , , , , , , , , , , Max Zhen References: <20210719212628.134129-1-lizhi.hou@xilinx.com> <20210719212628.134129-5-lizhi.hou@xilinx.com> From: Lizhi Hou Message-ID: Date: Mon, 26 Jul 2021 16:36:47 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: ef80aeb0-ccb0-43e9-97e2-08d9508e3cdd X-MS-TrafficTypeDiagnostic: BN6PR02MB2324: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:210; 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X-OriginatorOrg: xilinx.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Jul 2021 23:36:48.5429 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ef80aeb0-ccb0-43e9-97e2-08d9508e3cdd X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c;Ip=[149.199.62.198];Helo=[xsj-pvapexch02.xlnx.xilinx.com] X-MS-Exchange-CrossTenant-AuthSource: DM3NAM02FT022.eop-nam02.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR02MB2324 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Moritz, On 07/25/2021 09:15 PM, Moritz Fischer wrote: > On Mon, Jul 19, 2021 at 02:26:18PM -0700, 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 >> --- >> drivers/fpga/xrt/include/subdev_id.h | 39 +++ >> drivers/fpga/xrt/include/xdevice.h | 131 +++++++ >> 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 | 322 ++++++++++++++++++ >> drivers/fpga/xrt/lib/lib-drv.h | 21 ++ >> 9 files changed, 836 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..3afd96989fc5 >> --- /dev/null >> +++ b/drivers/fpga/xrt/include/xdevice.h >> @@ -0,0 +1,131 @@ >> +/* 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. >> + * id: id of the xrt device. > Shouldn't this document the rest of the members? Sure. I will add comments as below. * dev: generic device interface. * subdev_id: id of the xrt device. See enum xrt_subdev_id. * 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: ... etc? I will add comment as below. * ep_name: endpoint name * compat: compatible string >> +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 >> + * >> + * drv: driver model structure. > drv vs driver? will fix this. >> + * id_table: pointer to table of device IDs the driver is interested in. >> + * { } member terminated. > ? > file_ops? I will remove 'id_table' and add comment as below: * 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. >> + * probe: mandatory callback for device binding. >> + * remove: callback for device unbinding. >> + */ >> +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..2c2f9fe3e07e >> --- /dev/null >> +++ b/drivers/fpga/xrt/lib/lib-drv.c >> @@ -0,0 +1,322 @@ >> +// 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" >> +#define XRT_IPLIB_MODULE_VERSION "4.0.0" > No driver versions ... I will remove the version. >> +#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); > Don't need braces? I will remove the braces. >> +} >> + >> +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); >> + >> + pr_info("%s unregistered successfully\n", XRT_DRVNAME(drv)); > Drop this. Sure. >> +} >> +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); >> + 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 NULL; > Nit: return xdev Sure. >> + 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; > Do you need another label here? I don't see this getting cleaned up if > device_add() fails below ...? sdev_data will be cleaned up in xrt_device_unregister(). Thanks, Lizhi >> + >> + 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_VERSION(XRT_IPLIB_MODULE_VERSION); >> +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_ */ >> -- >> 2.27.0 >>