drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma_vchi.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 /*
   4  * VideoCore Shared Memory CMA allocator
   5  *
   6  * Copyright: 2018, Raspberry Pi (Trading) Ltd
   7  * Copyright 2011-2012 Broadcom Corporation.  All rights reserved.
   8  *
   9  * Based on vmcs_sm driver from Broadcom Corporation.
  10  *
  11  */
  12
  13 #ifndef __VC_SM_CMA_VCHI_H__INCLUDED__
  14 #define __VC_SM_CMA_VCHI_H__INCLUDED__
  15
  16 #include <linux/raspberrypi/vchiq.h>
  17
  18 #include "vc_sm_defs.h"
  19
  20 /*
  21  * Forward declare.
  22  */
  23 struct sm_instance;
  24
  25 typedef void (*vpu_event_cb)(struct sm_instance *instance,
  26                              struct vc_sm_result_t *reply, int reply_len);
  27
  28 /*
  29  * Initialize the shared memory service, opens up vchi connection to talk to it.
  30  */
  31 struct sm_instance *vc_sm_cma_vchi_init(struct vchiq_instance *vchi_instance,
  32                                         unsigned int num_connections,
  33                                         vpu_event_cb vpu_event);
  34
  35 /*
  36  * Terminates the shared memory service.
  37  */
  38 int vc_sm_cma_vchi_stop(struct sm_instance **handle);
  39
  40 /*
  41  * Ask the shared memory service to free up some memory that was previously
  42  * allocated by the vc_sm_cma_vchi_alloc function call.
  43  */
  44 int vc_sm_cma_vchi_free(struct sm_instance *handle, struct vc_sm_free_t *msg,
  45                         u32 *cur_trans_id);
  46
  47 /*
  48  * Import a contiguous block of memory and wrap it in a GPU MEM_HANDLE_T.
  49  */
  50 int vc_sm_cma_vchi_import(struct sm_instance *handle, struct vc_sm_import *msg,
  51                           struct vc_sm_import_result *result,
  52                           u32 *cur_trans_id);
  53
  54 int vc_sm_cma_vchi_client_version(struct sm_instance *handle,
  55                                   struct vc_sm_version *msg,
  56                                   struct vc_sm_result_t *result,
  57                                   u32 *cur_trans_id);
  58
  59 int vc_sm_vchi_client_vc_mem_req_reply(struct sm_instance *handle,
  60                                        struct vc_sm_vc_mem_request_result *msg,
  61                                        uint32_t *cur_trans_id);
  62
  63 #endif /* __VC_SM_CMA_VCHI_H__INCLUDED__ */