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/types.h> 28 #include <sys/param.h> 29 30 #include "common/common.h" 31 #include "cudbg.h" 32 #include "cudbg_lib_common.h" 33 34 int get_scratch_buff(struct cudbg_buffer *pdbg_buff, u32 size, 35 struct cudbg_buffer *pscratch_buff) 36 { 37 u32 scratch_offset; 38 int rc = 0; 39 40 scratch_offset = pdbg_buff->size - size; 41 42 if (pdbg_buff->offset > (int)scratch_offset || pdbg_buff->size < size) { 43 rc = CUDBG_STATUS_NO_SCRATCH_MEM; 44 goto err; 45 } else { 46 pscratch_buff->data = (char *)pdbg_buff->data + scratch_offset; 47 pscratch_buff->offset = 0; 48 pscratch_buff->size = size; 49 pdbg_buff->size -= size; 50 } 51 52 err: 53 return rc; 54 } 55 56 void release_scratch_buff(struct cudbg_buffer *pscratch_buff, 57 struct cudbg_buffer *pdbg_buff) 58 { 59 pdbg_buff->size += pscratch_buff->size; 60 /* Reset the used buffer to zero. 61 * If we dont do this, then it will effect the ext entity logic. 62 */ 63 memset(pscratch_buff->data, 0, pscratch_buff->size); 64 pscratch_buff->data = NULL; 65 pscratch_buff->offset = 0; 66 pscratch_buff->size = 0; 67 } 68 69 static inline void init_cudbg_hdr(struct cudbg_init_hdr *hdr) 70 { 71 hdr->major_ver = CUDBG_MAJOR_VERSION; 72 hdr->minor_ver = CUDBG_MINOR_VERSION; 73 hdr->build_ver = CUDBG_BUILD_VERSION; 74 hdr->init_struct_size = sizeof(struct cudbg_init); 75 } 76 77 void * 78 cudbg_alloc_handle(void) 79 { 80 struct cudbg_private *handle; 81 82 handle = malloc(sizeof(*handle), M_CXGBE, M_ZERO | M_WAITOK); 83 init_cudbg_hdr(&handle->dbg_init.header); 84 85 return (handle); 86 } 87 88 void 89 cudbg_free_handle(void *handle) 90 { 91 92 free(handle, M_CXGBE); 93 } 94