1 /* 2 * This file is provided under a dual BSD/GPLv2 license. When using or 3 * redistributing this file, you may do so under either license. 4 * 5 * GPL LICENSE SUMMARY 6 * 7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of version 2 of the GNU General Public License as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, but 14 * WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 21 * The full GNU General Public License is included in this distribution 22 * in the file called LICENSE.GPL. 23 * 24 * BSD LICENSE 25 * 26 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. 27 * All rights reserved. 28 * 29 * Redistribution and use in source and binary forms, with or without 30 * modification, are permitted provided that the following conditions 31 * are met: 32 * 33 * * Redistributions of source code must retain the above copyright 34 * notice, this list of conditions and the following disclaimer. 35 * * Redistributions in binary form must reproduce the above copyright 36 * notice, this list of conditions and the following disclaimer in 37 * the documentation and/or other materials provided with the 38 * distribution. 39 * * Neither the name of Intel Corporation nor the names of its 40 * contributors may be used to endorse or promote products derived 41 * from this software without specific prior written permission. 42 * 43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 44 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 45 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 46 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 47 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 54 */ 55 56 #ifndef _SCIC_SDS_UNSOLICITED_FRAME_CONTROL_H_ 57 #define _SCIC_SDS_UNSOLICITED_FRAME_CONTROL_H_ 58 59 #include "isci.h" 60 61 #define SCU_UNSOLICITED_FRAME_HEADER_DATA_DWORDS 15 62 63 /** 64 * struct scu_unsolicited_frame_header - 65 * 66 * This structure delineates the format of an unsolicited frame header. The 67 * first DWORD are UF attributes defined by the silicon architecture. The data 68 * depicts actual header information received on the link. 69 */ 70 struct scu_unsolicited_frame_header { 71 /** 72 * This field indicates if there is an Initiator Index Table entry with 73 * which this header is associated. 74 */ 75 u32 iit_exists:1; 76 77 /** 78 * This field simply indicates the protocol type (i.e. SSP, STP, SMP). 79 */ 80 u32 protocol_type:3; 81 82 /** 83 * This field indicates if the frame is an address frame (IAF or OAF) 84 * or if it is a information unit frame. 85 */ 86 u32 is_address_frame:1; 87 88 /** 89 * This field simply indicates the connection rate at which the frame 90 * was received. 91 */ 92 u32 connection_rate:4; 93 94 u32 reserved:23; 95 96 /** 97 * This field represents the actual header data received on the link. 98 */ 99 u32 data[SCU_UNSOLICITED_FRAME_HEADER_DATA_DWORDS]; 100 101 }; 102 103 104 105 /** 106 * enum unsolicited_frame_state - 107 * 108 * This enumeration represents the current unsolicited frame state. The 109 * controller object can not updtate the hardware unsolicited frame put pointer 110 * unless it has already processed the priror unsolicited frames. 111 */ 112 enum unsolicited_frame_state { 113 /** 114 * This state is when the frame is empty and not in use. It is 115 * different from the released state in that the hardware could DMA 116 * data to this frame buffer. 117 */ 118 UNSOLICITED_FRAME_EMPTY, 119 120 /** 121 * This state is set when the frame buffer is in use by by some 122 * object in the system. 123 */ 124 UNSOLICITED_FRAME_IN_USE, 125 126 /** 127 * This state is set when the frame is returned to the free pool 128 * but one or more frames prior to this one are still in use. 129 * Once all of the frame before this one are freed it will go to 130 * the empty state. 131 */ 132 UNSOLICITED_FRAME_RELEASED, 133 134 UNSOLICITED_FRAME_MAX_STATES 135 }; 136 137 /** 138 * struct sci_unsolicited_frame - 139 * 140 * This is the unsolicited frame data structure it acts as the container for 141 * the current frame state, frame header and frame buffer. 142 */ 143 struct sci_unsolicited_frame { 144 /** 145 * This field contains the current frame state 146 */ 147 enum unsolicited_frame_state state; 148 149 /** 150 * This field points to the frame header data. 151 */ 152 struct scu_unsolicited_frame_header *header; 153 154 /** 155 * This field points to the frame buffer data. 156 */ 157 void *buffer; 158 159 }; 160 161 /** 162 * struct sci_uf_header_array - 163 * 164 * This structure contains all of the unsolicited frame header information. 165 */ 166 struct sci_uf_header_array { 167 /** 168 * This field is represents a virtual pointer to the start 169 * address of the UF address table. The table contains 170 * 64-bit pointers as required by the hardware. 171 */ 172 struct scu_unsolicited_frame_header *array; 173 174 /** 175 * This field specifies the physical address location for the UF 176 * buffer array. 177 */ 178 dma_addr_t physical_address; 179 180 }; 181 182 /** 183 * struct sci_uf_buffer_array - 184 * 185 * This structure contains all of the unsolicited frame buffer (actual payload) 186 * information. 187 */ 188 struct sci_uf_buffer_array { 189 /** 190 * This field is the unsolicited frame data its used to manage 191 * the data for the unsolicited frame requests. It also represents 192 * the virtual address location that corresponds to the 193 * physical_address field. 194 */ 195 struct sci_unsolicited_frame array[SCU_MAX_UNSOLICITED_FRAMES]; 196 197 /** 198 * This field specifies the physical address location for the UF 199 * buffer array. 200 */ 201 dma_addr_t physical_address; 202 }; 203 204 /** 205 * struct sci_uf_address_table_array - 206 * 207 * This object maintains all of the unsolicited frame address table specific 208 * data. The address table is a collection of 64-bit pointers that point to 209 * 1KB buffers into which the silicon will DMA unsolicited frames. 210 */ 211 struct sci_uf_address_table_array { 212 /** 213 * This field represents a virtual pointer that refers to the 214 * starting address of the UF address table. 215 * 64-bit pointers are required by the hardware. 216 */ 217 u64 *array; 218 219 /** 220 * This field specifies the physical address location for the UF 221 * address table. 222 */ 223 dma_addr_t physical_address; 224 225 }; 226 227 /** 228 * struct sci_unsolicited_frame_control - 229 * 230 * This object contains all of the data necessary to handle unsolicited frames. 231 */ 232 struct sci_unsolicited_frame_control { 233 /** 234 * This field is the software copy of the unsolicited frame queue 235 * get pointer. The controller object writes this value to the 236 * hardware to let the hardware put more unsolicited frame entries. 237 */ 238 u32 get; 239 240 /** 241 * This field contains all of the unsolicited frame header 242 * specific fields. 243 */ 244 struct sci_uf_header_array headers; 245 246 /** 247 * This field contains all of the unsolicited frame buffer 248 * specific fields. 249 */ 250 struct sci_uf_buffer_array buffers; 251 252 /** 253 * This field contains all of the unsolicited frame address table 254 * specific fields. 255 */ 256 struct sci_uf_address_table_array address_table; 257 258 }; 259 260 #define SCI_UFI_BUF_SIZE (SCU_MAX_UNSOLICITED_FRAMES * SCU_UNSOLICITED_FRAME_BUFFER_SIZE) 261 #define SCI_UFI_HDR_SIZE (SCU_MAX_UNSOLICITED_FRAMES * sizeof(struct scu_unsolicited_frame_header)) 262 #define SCI_UFI_TOTAL_SIZE (SCI_UFI_BUF_SIZE + SCI_UFI_HDR_SIZE + SCU_MAX_UNSOLICITED_FRAMES * sizeof(u64)) 263 264 struct isci_host; 265 266 void sci_unsolicited_frame_control_construct(struct isci_host *ihost); 267 268 enum sci_status sci_unsolicited_frame_control_get_header( 269 struct sci_unsolicited_frame_control *uf_control, 270 u32 frame_index, 271 void **frame_header); 272 273 enum sci_status sci_unsolicited_frame_control_get_buffer( 274 struct sci_unsolicited_frame_control *uf_control, 275 u32 frame_index, 276 void **frame_buffer); 277 278 bool sci_unsolicited_frame_control_release_frame( 279 struct sci_unsolicited_frame_control *uf_control, 280 u32 frame_index); 281 282 #endif /* _SCIC_SDS_UNSOLICITED_FRAME_CONTROL_H_ */ 283