drivers/net/ethernet/chelsio/cxgb4/cudbg_common.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  Copyright (C) 2017 Chelsio Communications.  All rights reserved.
   4  */
   5
   6 #include "cxgb4.h"
   7 #include "cudbg_if.h"
   8 #include "cudbg_lib_common.h"
   9
  10 int cudbg_get_buff(struct cudbg_init *pdbg_init,
  11                    struct cudbg_buffer *pdbg_buff, u32 size,
  12                    struct cudbg_buffer *pin_buff)
  13 {
  14         u32 offset;
  15
  16         offset = pdbg_buff->offset;
  17         if (offset + size > pdbg_buff->size)
  18                 return CUDBG_STATUS_NO_MEM;
  19
  20         if (pdbg_init->compress_type != CUDBG_COMPRESSION_NONE) {
  21                 if (size > pdbg_init->compress_buff_size)
  22                         return CUDBG_STATUS_NO_MEM;
  23
  24                 pin_buff->data = (char *)pdbg_init->compress_buff;
  25                 pin_buff->offset = 0;
  26                 pin_buff->size = size;
  27                 return 0;
  28         }
  29
  30         pin_buff->data = (char *)pdbg_buff->data + offset;
  31         pin_buff->offset = offset;
  32         pin_buff->size = size;
  33         return 0;
  34 }
  35
  36 void cudbg_put_buff(struct cudbg_init *pdbg_init,
  37                     struct cudbg_buffer *pin_buff)
  38 {
  39         /* Clear compression buffer for re-use */
  40         if (pdbg_init->compress_type != CUDBG_COMPRESSION_NONE)
  41                 memset(pdbg_init->compress_buff, 0,
  42                        pdbg_init->compress_buff_size);
  43
  44         pin_buff->data = NULL;
  45         pin_buff->offset = 0;
  46         pin_buff->size = 0;
  47 }
  48
  49 void cudbg_update_buff(struct cudbg_buffer *pin_buff,
  50                        struct cudbg_buffer *pout_buff)
  51 {
  52         /* We already write to buffer provided by ethool, so just
  53          * increment offset to next free space.
  54          */
  55         pout_buff->offset += pin_buff->size;
  56 }