cudbg_common.c

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    1 /*-
    2  * Copyright (c) 2017 Chelsio Communications, Inc.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD$");
   29 
   30 #include <sys/types.h>
   31 #include <sys/param.h>
   32 
   33 #include "common/common.h"
   34 #include "cudbg.h"
   35 #include "cudbg_lib_common.h"
   36 
   37 int get_scratch_buff(struct cudbg_buffer *pdbg_buff, u32 size,
   38                      struct cudbg_buffer *pscratch_buff)
   39 {
   40         u32 scratch_offset;
   41         int rc = 0;
   42 
   43         scratch_offset = pdbg_buff->size - size;
   44 
   45         if (pdbg_buff->offset > (int)scratch_offset || pdbg_buff->size < size) {
   46                 rc = CUDBG_STATUS_NO_SCRATCH_MEM;
   47                 goto err;
   48         } else {
   49                 pscratch_buff->data = (char *)pdbg_buff->data + scratch_offset;
   50                 pscratch_buff->offset = 0;
   51                 pscratch_buff->size = size;
   52                 pdbg_buff->size -= size;
   53         }
   54 
   55 err:
   56         return rc;
   57 }
   58 
   59 void release_scratch_buff(struct cudbg_buffer *pscratch_buff,
   60                           struct cudbg_buffer *pdbg_buff)
   61 {
   62         pdbg_buff->size += pscratch_buff->size;
   63         /* Reset the used buffer to zero.
   64          * If we dont do this, then it will effect the ext entity logic.
   65          */
   66         memset(pscratch_buff->data, 0, pscratch_buff->size);
   67         pscratch_buff->data = NULL;
   68         pscratch_buff->offset = 0;
   69         pscratch_buff->size = 0;
   70 }
   71 
   72 static inline void init_cudbg_hdr(struct cudbg_init_hdr *hdr)
   73 {
   74         hdr->major_ver = CUDBG_MAJOR_VERSION;
   75         hdr->minor_ver = CUDBG_MINOR_VERSION;
   76         hdr->build_ver = CUDBG_BUILD_VERSION;
   77         hdr->init_struct_size = sizeof(struct cudbg_init);
   78 }
   79 
   80 void *
   81 cudbg_alloc_handle(void)
   82 {
   83         struct cudbg_private *handle;
   84 
   85         handle = malloc(sizeof(*handle), M_CXGBE, M_ZERO | M_WAITOK);
   86         init_cudbg_hdr(&handle->dbg_init.header);
   87 
   88         return (handle);
   89 }
   90 
   91 void
   92 cudbg_free_handle(void *handle)
   93 {
   94 
   95         free(handle, M_CXGBE);
   96 }

Cache object: 7480f081559d0ee5289f44f4a7036670

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FreeBSD/Linux Kernel Cross Reference sys/dev/cxgbe/cudbg/cudbg_common.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/cxgbe/cudbg/cudbg_common.c