root/drivers/platform/x86/intel_speed_select_if/isst_if_common.h

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INCLUDED FROM


   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Intel Speed Select Interface: Drivers Internal defines
   4  * Copyright (c) 2019, Intel Corporation.
   5  * All rights reserved.
   6  *
   7  * Author: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
   8  */
   9 
  10 #ifndef __ISST_IF_COMMON_H
  11 #define __ISST_IF_COMMON_H
  12 
  13 #define INTEL_RAPL_PRIO_DEVID_0 0x3451
  14 #define INTEL_CFG_MBOX_DEVID_0  0x3459
  15 
  16 /*
  17  * Validate maximum commands in a single request.
  18  * This is enough to handle command to every core in one ioctl, or all
  19  * possible message id to one CPU. Limit is also helpful for resonse time
  20  * per IOCTL request, as PUNIT may take different times to process each
  21  * request and may hold for long for too many commands.
  22  */
  23 #define ISST_IF_CMD_LIMIT       64
  24 
  25 #define ISST_IF_API_VERSION     0x01
  26 #define ISST_IF_DRIVER_VERSION  0x01
  27 
  28 #define ISST_IF_DEV_MBOX        0
  29 #define ISST_IF_DEV_MMIO        1
  30 #define ISST_IF_DEV_MAX         2
  31 
  32 /**
  33  * struct isst_if_cmd_cb - Used to register a IOCTL handler
  34  * @registered: Used by the common code to store registry. Caller don't
  35  *              to touch this field
  36  * @cmd_size:   The command size of the individual command in IOCTL
  37  * @offset:     Offset to the first valid member in command structure.
  38  *              This will be the offset of the start of the command
  39  *              after command count field
  40  * @cmd_callback: Callback function to handle IOCTL. The callback has the
  41  *              command pointer with data for command. There is a pointer
  42  *              called write_only, which when set, will not copy the
  43  *              response to user ioctl buffer. The "resume" argument
  44  *              can be used to avoid storing the command for replay
  45  *              during system resume
  46  *
  47  * This structure is used to register an handler for IOCTL. To avoid
  48  * code duplication common code handles all the IOCTL command read/write
  49  * including handling multiple command in single IOCTL. The caller just
  50  * need to execute a command via the registered callback.
  51  */
  52 struct isst_if_cmd_cb {
  53         int registered;
  54         int cmd_size;
  55         int offset;
  56         struct module *owner;
  57         long (*cmd_callback)(u8 *ptr, int *write_only, int resume);
  58 };
  59 
  60 /* Internal interface functions */
  61 int isst_if_cdev_register(int type, struct isst_if_cmd_cb *cb);
  62 void isst_if_cdev_unregister(int type);
  63 struct pci_dev *isst_if_get_pci_dev(int cpu, int bus, int dev, int fn);
  64 bool isst_if_mbox_cmd_set_req(struct isst_if_mbox_cmd *mbox_cmd);
  65 bool isst_if_mbox_cmd_invalid(struct isst_if_mbox_cmd *cmd);
  66 int isst_store_cmd(int cmd, int sub_command, u32 cpu, int mbox_cmd,
  67                    u32 param, u64 data);
  68 void isst_resume_common(void);
  69 #endif

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