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 } 97