Sridhar Parasuram | bf39132 | 2015-01-23 09:29:07 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2015, The Linux Foundation. All rights reserved. |
| 2 | |
| 3 | Redistribution and use in source and binary forms, with or without |
| 4 | modification, are permitted provided that the following conditions are |
| 5 | met: |
| 6 | * Redistributions of source code must retain the above copyright |
| 7 | notice, this list of conditions and the following disclaimer. |
| 8 | * Redistributions in binary form must reproduce the above |
| 9 | copyright notice, this list of conditions and the following |
| 10 | disclaimer in the documentation and/or other materials provided |
| 11 | with the distribution. |
| 12 | * Neither the name of The Linux Foundation nor the names of its |
| 13 | contributors may be used to endorse or promote products derived |
| 14 | from this software without specific prior written permission. |
| 15 | |
| 16 | THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| 17 | WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 18 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| 19 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| 20 | BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 21 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 22 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 23 | BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 24 | WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| 25 | OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| 26 | IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | /*=========================================================================== |
| 30 | INCLUDE FILES |
| 31 | ===========================================================================*/ |
| 32 | #include "glink.h" |
| 33 | #include "glink_core_if.h" |
| 34 | #include "glink_transport_if.h" |
| 35 | #include "glink_vector.h" |
| 36 | #include "glink_os_utils.h" |
| 37 | |
| 38 | /*=========================================================================== |
| 39 | LOCAL DATA DECLARATIONS |
| 40 | ===========================================================================*/ |
| 41 | |
| 42 | |
| 43 | /*=========================================================================== |
| 44 | PRIVATE FUNCTIONS |
| 45 | ===========================================================================*/ |
| 46 | |
| 47 | /*=========================================================================== |
| 48 | FUNCTION glink_dummy_tx_vprovider |
| 49 | ===========================================================================*/ |
| 50 | /** |
| 51 | |
| 52 | Buffer provider for virtual space that operates on a non-vectored buffer. |
| 53 | |
| 54 | @param[in] iovec Pointer to the dummy vector. |
| 55 | @param[in] offset Offset within the dummy vector. |
| 56 | @param[out] size Size of the provied buffer. |
| 57 | |
| 58 | @return virtual address of the buffer. |
| 59 | |
| 60 | @sideeffects None. |
| 61 | */ |
| 62 | /*=========================================================================*/ |
| 63 | void* glink_dummy_tx_vprovider |
| 64 | ( |
| 65 | void* iovec, |
| 66 | size_t offset, |
| 67 | size_t *size |
| 68 | ) |
| 69 | { |
| 70 | glink_core_tx_pkt_type* pkt = (glink_core_tx_pkt_type*)iovec; |
| 71 | |
| 72 | if (pkt == NULL || size == NULL || pkt->size <= offset) |
| 73 | { |
| 74 | return NULL; |
| 75 | } |
| 76 | |
| 77 | *size = pkt->size - offset; |
| 78 | |
| 79 | return (char*)(pkt->data) + offset; |
| 80 | } |
| 81 | |
| 82 | /*=========================================================================== |
| 83 | FUNCTION glink_iovec_vprovider |
| 84 | ===========================================================================*/ |
| 85 | /** |
| 86 | |
| 87 | Buffer provider for virtual space that operates on a Glink iovec. |
| 88 | |
| 89 | @param[in] iovec Pointer to the dummy vector. |
| 90 | @param[in] offset Offset within the dummy vector. |
| 91 | @param[out] size Size of the provied buffer. |
| 92 | |
| 93 | @return virtual address of the buffer. |
| 94 | |
| 95 | @sideeffects None. |
| 96 | */ |
| 97 | /*=========================================================================*/ |
| 98 | void* glink_iovec_vprovider |
| 99 | ( |
| 100 | void* iovec, |
| 101 | size_t offset, |
| 102 | size_t *size |
| 103 | ) |
| 104 | { |
| 105 | glink_iovector_type* iovec_l = (glink_iovector_type*)iovec; |
| 106 | |
| 107 | if (iovec_l == NULL || size == NULL) |
| 108 | { |
| 109 | return NULL; |
| 110 | } |
| 111 | |
Sridhar Parasuram | bf39132 | 2015-01-23 09:29:07 -0800 | [diff] [blame] | 112 | if (!iovec_l->vlast || iovec_l->vlast->start_offset > offset) |
| 113 | { |
| 114 | iovec_l->vlast = iovec_l->vlist; |
| 115 | } |
| 116 | |
| 117 | while (iovec_l->vlast && |
| 118 | iovec_l->vlast->start_offset + iovec_l->vlast->size <= offset) |
| 119 | { |
| 120 | iovec_l->vlast = iovec_l->vlast->next; |
| 121 | } |
| 122 | |
| 123 | if (iovec_l->vlast == NULL) |
| 124 | { |
| 125 | return NULL; |
| 126 | } |
| 127 | |
| 128 | offset -= iovec_l->vlast->start_offset; |
| 129 | *size = iovec_l->vlast->size - offset; |
| 130 | |
| 131 | return (char*)(iovec_l->vlast->data) + offset; |
| 132 | } |
| 133 | |
| 134 | /*=========================================================================== |
| 135 | FUNCTION glink_iovec_pprovider |
| 136 | ===========================================================================*/ |
| 137 | /** |
| 138 | |
| 139 | Buffer provider for physical space that operates on a Glink iovec. |
| 140 | |
| 141 | @param[in] iovec Pointer to the dummy vector. |
| 142 | @param[in] offset Offset within the dummy vector. |
| 143 | @param[out] size Size of the provied buffer. |
| 144 | |
| 145 | @return physical address of the buffer. |
| 146 | |
| 147 | @sideeffects None. |
| 148 | */ |
| 149 | /*=========================================================================*/ |
| 150 | void* glink_iovec_pprovider |
| 151 | ( |
| 152 | void* iovec, |
| 153 | size_t offset, |
| 154 | size_t *size |
| 155 | ) |
| 156 | { |
| 157 | glink_iovector_type* iovec_l = (glink_iovector_type*)iovec; |
| 158 | |
| 159 | if (iovec_l == NULL || size == NULL) |
| 160 | { |
| 161 | return NULL; |
| 162 | } |
| 163 | |
Sridhar Parasuram | bf39132 | 2015-01-23 09:29:07 -0800 | [diff] [blame] | 164 | if (!iovec_l->plast || iovec_l->plast->start_offset > offset) |
| 165 | { |
| 166 | iovec_l->plast = iovec_l->plist; |
| 167 | } |
| 168 | |
| 169 | while (iovec_l->plast && |
| 170 | iovec_l->plast->start_offset + iovec_l->plast->size <= offset) |
| 171 | { |
| 172 | iovec_l->plast = iovec_l->plast->next; |
| 173 | } |
| 174 | |
| 175 | if (iovec_l->plast == NULL) |
| 176 | { |
| 177 | return NULL; |
| 178 | } |
| 179 | |
| 180 | offset -= iovec_l->plast->start_offset; |
| 181 | *size = iovec_l->plast->size - offset; |
| 182 | |
| 183 | return (char*)(iovec_l->plast->data) + offset; |
| 184 | } |