drivers/misc/mic/scif/scif_rma_list.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Intel MIC Platform Software Stack (MPSS)
   4  *
   5  * Copyright(c) 2015 Intel Corporation.
   6  *
   7  * Intel SCIF driver.
   8  */
   9 #ifndef SCIF_RMA_LIST_H
  10 #define SCIF_RMA_LIST_H
  11
  12 /*
  13  * struct scif_rma_req - Self Registration list RMA Request query
  14  *
  15  * @out_window - Returns the window if found
  16  * @offset: Starting offset
  17  * @nr_bytes: number of bytes
  18  * @prot: protection requested i.e. read or write or both
  19  * @type: Specify single, partial or multiple windows
  20  * @head: Head of list on which to search
  21  * @va_for_temp: VA for searching temporary cached windows
  22  */
  23 struct scif_rma_req {
  24         struct scif_window **out_window;
  25         union {
  26                 s64 offset;
  27                 unsigned long va_for_temp;
  28         };
  29         size_t nr_bytes;
  30         int prot;
  31         enum scif_window_type type;
  32         struct list_head *head;
  33 };
  34
  35 /* Insert */
  36 void scif_insert_window(struct scif_window *window, struct list_head *head);
  37 void scif_insert_tcw(struct scif_window *window,
  38                      struct list_head *head);
  39 /* Query */
  40 int scif_query_window(struct scif_rma_req *request);
  41 int scif_query_tcw(struct scif_endpt *ep, struct scif_rma_req *request);
  42 /* Called from close to unregister all self windows */
  43 int scif_unregister_all_windows(scif_epd_t epd);
  44 void scif_unmap_all_windows(scif_epd_t epd);
  45 /* Traverse list and unregister */
  46 int scif_rma_list_unregister(struct scif_window *window, s64 offset,
  47                              int nr_pages);
  48 #endif /* SCIF_RMA_LIST_H */