Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 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 | #include "isci.h" |
Dan Williams | ce2b326 | 2011-05-08 15:49:15 -0700 | [diff] [blame] | 57 | #include "host.h" |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 58 | #include "phy.h" |
Dan Williams | d35bc1b | 2011-05-10 02:28:45 -0700 | [diff] [blame^] | 59 | #include "scu_event_codes.h" |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 60 | #include "scic_port.h" |
| 61 | #include "scic_config_parameters.h" |
Dan Williams | d35bc1b | 2011-05-10 02:28:45 -0700 | [diff] [blame^] | 62 | #include "timers.h" |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 63 | |
Dan Williams | d35bc1b | 2011-05-10 02:28:45 -0700 | [diff] [blame^] | 64 | /* Maximum arbitration wait time in micro-seconds */ |
| 65 | #define SCIC_SDS_PHY_MAX_ARBITRATION_WAIT_TIME (700) |
| 66 | |
| 67 | enum sas_linkrate sci_phy_linkrate(struct scic_sds_phy *sci_phy) |
| 68 | { |
| 69 | return sci_phy->max_negotiated_speed; |
| 70 | } |
| 71 | |
| 72 | /* |
| 73 | * ***************************************************************************** |
| 74 | * * SCIC SDS PHY Internal Methods |
| 75 | * ***************************************************************************** */ |
| 76 | |
| 77 | /** |
| 78 | * This method will initialize the phy transport layer registers |
| 79 | * @sci_phy: |
| 80 | * @transport_layer_registers |
| 81 | * |
| 82 | * enum sci_status |
| 83 | */ |
| 84 | static enum sci_status scic_sds_phy_transport_layer_initialization( |
| 85 | struct scic_sds_phy *sci_phy, |
| 86 | struct scu_transport_layer_registers __iomem *transport_layer_registers) |
| 87 | { |
| 88 | u32 tl_control; |
| 89 | |
| 90 | sci_phy->transport_layer_registers = transport_layer_registers; |
| 91 | |
| 92 | writel(SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX, |
| 93 | &sci_phy->transport_layer_registers->stp_rni); |
| 94 | |
| 95 | /* |
| 96 | * Hardware team recommends that we enable the STP prefetch for all |
| 97 | * transports |
| 98 | */ |
| 99 | tl_control = readl(&sci_phy->transport_layer_registers->control); |
| 100 | tl_control |= SCU_TLCR_GEN_BIT(STP_WRITE_DATA_PREFETCH); |
| 101 | writel(tl_control, &sci_phy->transport_layer_registers->control); |
| 102 | |
| 103 | return SCI_SUCCESS; |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * This method will initialize the phy link layer registers |
| 108 | * @sci_phy: |
| 109 | * @link_layer_registers: |
| 110 | * |
| 111 | * enum sci_status |
| 112 | */ |
| 113 | static enum sci_status |
| 114 | scic_sds_phy_link_layer_initialization(struct scic_sds_phy *sci_phy, |
| 115 | struct scu_link_layer_registers __iomem *link_layer_registers) |
| 116 | { |
| 117 | struct scic_sds_controller *scic = |
| 118 | sci_phy->owning_port->owning_controller; |
| 119 | int phy_idx = sci_phy->phy_index; |
| 120 | struct sci_phy_user_params *phy_user = |
| 121 | &scic->user_parameters.sds1.phys[phy_idx]; |
| 122 | struct sci_phy_oem_params *phy_oem = |
| 123 | &scic->oem_parameters.sds1.phys[phy_idx]; |
| 124 | u32 phy_configuration; |
| 125 | struct scic_phy_cap phy_cap; |
| 126 | u32 parity_check = 0; |
| 127 | u32 parity_count = 0; |
| 128 | u32 llctl, link_rate; |
| 129 | u32 clksm_value = 0; |
| 130 | |
| 131 | sci_phy->link_layer_registers = link_layer_registers; |
| 132 | |
| 133 | /* Set our IDENTIFY frame data */ |
| 134 | #define SCI_END_DEVICE 0x01 |
| 135 | |
| 136 | writel(SCU_SAS_TIID_GEN_BIT(SMP_INITIATOR) | |
| 137 | SCU_SAS_TIID_GEN_BIT(SSP_INITIATOR) | |
| 138 | SCU_SAS_TIID_GEN_BIT(STP_INITIATOR) | |
| 139 | SCU_SAS_TIID_GEN_BIT(DA_SATA_HOST) | |
| 140 | SCU_SAS_TIID_GEN_VAL(DEVICE_TYPE, SCI_END_DEVICE), |
| 141 | &sci_phy->link_layer_registers->transmit_identification); |
| 142 | |
| 143 | /* Write the device SAS Address */ |
| 144 | writel(0xFEDCBA98, |
| 145 | &sci_phy->link_layer_registers->sas_device_name_high); |
| 146 | writel(phy_idx, &sci_phy->link_layer_registers->sas_device_name_low); |
| 147 | |
| 148 | /* Write the source SAS Address */ |
| 149 | writel(phy_oem->sas_address.high, |
| 150 | &sci_phy->link_layer_registers->source_sas_address_high); |
| 151 | writel(phy_oem->sas_address.low, |
| 152 | &sci_phy->link_layer_registers->source_sas_address_low); |
| 153 | |
| 154 | /* Clear and Set the PHY Identifier */ |
| 155 | writel(0, &sci_phy->link_layer_registers->identify_frame_phy_id); |
| 156 | writel(SCU_SAS_TIPID_GEN_VALUE(ID, phy_idx), |
| 157 | &sci_phy->link_layer_registers->identify_frame_phy_id); |
| 158 | |
| 159 | /* Change the initial state of the phy configuration register */ |
| 160 | phy_configuration = |
| 161 | readl(&sci_phy->link_layer_registers->phy_configuration); |
| 162 | |
| 163 | /* Hold OOB state machine in reset */ |
| 164 | phy_configuration |= SCU_SAS_PCFG_GEN_BIT(OOB_RESET); |
| 165 | writel(phy_configuration, |
| 166 | &sci_phy->link_layer_registers->phy_configuration); |
| 167 | |
| 168 | /* Configure the SNW capabilities */ |
| 169 | phy_cap.all = 0; |
| 170 | phy_cap.start = 1; |
| 171 | phy_cap.gen3_no_ssc = 1; |
| 172 | phy_cap.gen2_no_ssc = 1; |
| 173 | phy_cap.gen1_no_ssc = 1; |
| 174 | if (scic->oem_parameters.sds1.controller.do_enable_ssc == true) { |
| 175 | phy_cap.gen3_ssc = 1; |
| 176 | phy_cap.gen2_ssc = 1; |
| 177 | phy_cap.gen1_ssc = 1; |
| 178 | } |
| 179 | |
| 180 | /* |
| 181 | * The SAS specification indicates that the phy_capabilities that |
| 182 | * are transmitted shall have an even parity. Calculate the parity. */ |
| 183 | parity_check = phy_cap.all; |
| 184 | while (parity_check != 0) { |
| 185 | if (parity_check & 0x1) |
| 186 | parity_count++; |
| 187 | parity_check >>= 1; |
| 188 | } |
| 189 | |
| 190 | /* |
| 191 | * If parity indicates there are an odd number of bits set, then |
| 192 | * set the parity bit to 1 in the phy capabilities. */ |
| 193 | if ((parity_count % 2) != 0) |
| 194 | phy_cap.parity = 1; |
| 195 | |
| 196 | writel(phy_cap.all, &sci_phy->link_layer_registers->phy_capabilities); |
| 197 | |
| 198 | /* Set the enable spinup period but disable the ability to send |
| 199 | * notify enable spinup |
| 200 | */ |
| 201 | writel(SCU_ENSPINUP_GEN_VAL(COUNT, |
| 202 | phy_user->notify_enable_spin_up_insertion_frequency), |
| 203 | &sci_phy->link_layer_registers->notify_enable_spinup_control); |
| 204 | |
| 205 | /* Write the ALIGN Insertion Ferequency for connected phy and |
| 206 | * inpendent of connected state |
| 207 | */ |
| 208 | clksm_value = SCU_ALIGN_INSERTION_FREQUENCY_GEN_VAL(CONNECTED, |
| 209 | phy_user->in_connection_align_insertion_frequency); |
| 210 | |
| 211 | clksm_value |= SCU_ALIGN_INSERTION_FREQUENCY_GEN_VAL(GENERAL, |
| 212 | phy_user->align_insertion_frequency); |
| 213 | |
| 214 | writel(clksm_value, &sci_phy->link_layer_registers->clock_skew_management); |
| 215 | |
| 216 | /* @todo Provide a way to write this register correctly */ |
| 217 | writel(0x02108421, |
| 218 | &sci_phy->link_layer_registers->afe_lookup_table_control); |
| 219 | |
| 220 | llctl = SCU_SAS_LLCTL_GEN_VAL(NO_OUTBOUND_TASK_TIMEOUT, |
| 221 | (u8)scic->user_parameters.sds1.no_outbound_task_timeout); |
| 222 | |
| 223 | switch(phy_user->max_speed_generation) { |
| 224 | case SCIC_SDS_PARM_GEN3_SPEED: |
| 225 | link_rate = SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN3; |
| 226 | break; |
| 227 | case SCIC_SDS_PARM_GEN2_SPEED: |
| 228 | link_rate = SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN2; |
| 229 | break; |
| 230 | default: |
| 231 | link_rate = SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN1; |
| 232 | break; |
| 233 | } |
| 234 | llctl |= SCU_SAS_LLCTL_GEN_VAL(MAX_LINK_RATE, link_rate); |
| 235 | writel(llctl, &sci_phy->link_layer_registers->link_layer_control); |
| 236 | |
| 237 | if (is_a0() || is_a2()) { |
| 238 | /* Program the max ARB time for the PHY to 700us so we inter-operate with |
| 239 | * the PMC expander which shuts down PHYs if the expander PHY generates too |
| 240 | * many breaks. This time value will guarantee that the initiator PHY will |
| 241 | * generate the break. |
| 242 | */ |
| 243 | writel(SCIC_SDS_PHY_MAX_ARBITRATION_WAIT_TIME, |
| 244 | &sci_phy->link_layer_registers->maximum_arbitration_wait_timer_timeout); |
| 245 | } |
| 246 | |
| 247 | /* |
| 248 | * Set the link layer hang detection to 500ms (0x1F4) from its default |
| 249 | * value of 128ms. Max value is 511 ms. |
| 250 | */ |
| 251 | writel(0x1F4, &sci_phy->link_layer_registers->link_layer_hang_detection_timeout); |
| 252 | |
| 253 | /* We can exit the initial state to the stopped state */ |
| 254 | sci_base_state_machine_change_state(&sci_phy->state_machine, |
| 255 | SCI_BASE_PHY_STATE_STOPPED); |
| 256 | |
| 257 | return SCI_SUCCESS; |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * This function will handle the sata SIGNATURE FIS timeout condition. It will |
| 262 | * restart the starting substate machine since we dont know what has actually |
| 263 | * happening. |
| 264 | */ |
| 265 | static void scic_sds_phy_sata_timeout(void *phy) |
| 266 | { |
| 267 | struct scic_sds_phy *sci_phy = phy; |
| 268 | |
| 269 | dev_dbg(sciphy_to_dev(sci_phy), |
| 270 | "%s: SCIC SDS Phy 0x%p did not receive signature fis before " |
| 271 | "timeout.\n", |
| 272 | __func__, |
| 273 | sci_phy); |
| 274 | |
| 275 | sci_base_state_machine_stop(&sci_phy->starting_substate_machine); |
| 276 | |
| 277 | sci_base_state_machine_change_state(&sci_phy->state_machine, |
| 278 | SCI_BASE_PHY_STATE_STARTING); |
| 279 | } |
| 280 | |
| 281 | /** |
| 282 | * This method returns the port currently containing this phy. If the phy is |
| 283 | * currently contained by the dummy port, then the phy is considered to not |
| 284 | * be part of a port. |
| 285 | * @sci_phy: This parameter specifies the phy for which to retrieve the |
| 286 | * containing port. |
| 287 | * |
| 288 | * This method returns a handle to a port that contains the supplied phy. |
| 289 | * NULL This value is returned if the phy is not part of a real |
| 290 | * port (i.e. it's contained in the dummy port). !NULL All other |
| 291 | * values indicate a handle/pointer to the port containing the phy. |
| 292 | */ |
| 293 | struct scic_sds_port *scic_sds_phy_get_port( |
| 294 | struct scic_sds_phy *sci_phy) |
| 295 | { |
| 296 | if (scic_sds_port_get_index(sci_phy->owning_port) == SCIC_SDS_DUMMY_PORT) |
| 297 | return NULL; |
| 298 | |
| 299 | return sci_phy->owning_port; |
| 300 | } |
| 301 | |
| 302 | /** |
| 303 | * This method will assign a port to the phy object. |
| 304 | * @out]: sci_phy This parameter specifies the phy for which to assign a port |
| 305 | * object. |
| 306 | * |
| 307 | * |
| 308 | */ |
| 309 | void scic_sds_phy_set_port( |
| 310 | struct scic_sds_phy *sci_phy, |
| 311 | struct scic_sds_port *sci_port) |
| 312 | { |
| 313 | sci_phy->owning_port = sci_port; |
| 314 | |
| 315 | if (sci_phy->bcn_received_while_port_unassigned) { |
| 316 | sci_phy->bcn_received_while_port_unassigned = false; |
| 317 | scic_sds_port_broadcast_change_received(sci_phy->owning_port, sci_phy); |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | /** |
| 322 | * This method will initialize the constructed phy |
| 323 | * @sci_phy: |
| 324 | * @link_layer_registers: |
| 325 | * |
| 326 | * enum sci_status |
| 327 | */ |
| 328 | enum sci_status scic_sds_phy_initialize( |
| 329 | struct scic_sds_phy *sci_phy, |
| 330 | struct scu_transport_layer_registers __iomem *transport_layer_registers, |
| 331 | struct scu_link_layer_registers __iomem *link_layer_registers) |
| 332 | { |
| 333 | struct scic_sds_controller *scic = scic_sds_phy_get_controller(sci_phy); |
| 334 | struct isci_host *ihost = scic_to_ihost(scic); |
| 335 | |
| 336 | /* Create the SIGNATURE FIS Timeout timer for this phy */ |
| 337 | sci_phy->sata_timeout_timer = |
| 338 | isci_timer_create( |
| 339 | ihost, |
| 340 | sci_phy, |
| 341 | scic_sds_phy_sata_timeout); |
| 342 | |
| 343 | /* Perfrom the initialization of the TL hardware */ |
| 344 | scic_sds_phy_transport_layer_initialization( |
| 345 | sci_phy, |
| 346 | transport_layer_registers); |
| 347 | |
| 348 | /* Perofrm the initialization of the PE hardware */ |
| 349 | scic_sds_phy_link_layer_initialization(sci_phy, link_layer_registers); |
| 350 | |
| 351 | /* |
| 352 | * There is nothing that needs to be done in this state just |
| 353 | * transition to the stopped state. */ |
| 354 | sci_base_state_machine_change_state(&sci_phy->state_machine, |
| 355 | SCI_BASE_PHY_STATE_STOPPED); |
| 356 | |
| 357 | return SCI_SUCCESS; |
| 358 | } |
| 359 | |
| 360 | /** |
| 361 | * This method assigns the direct attached device ID for this phy. |
| 362 | * |
| 363 | * @sci_phy The phy for which the direct attached device id is to |
| 364 | * be assigned. |
| 365 | * @device_id The direct attached device ID to assign to the phy. |
| 366 | * This will either be the RNi for the device or an invalid RNi if there |
| 367 | * is no current device assigned to the phy. |
| 368 | */ |
| 369 | void scic_sds_phy_setup_transport( |
| 370 | struct scic_sds_phy *sci_phy, |
| 371 | u32 device_id) |
| 372 | { |
| 373 | u32 tl_control; |
| 374 | |
| 375 | writel(device_id, &sci_phy->transport_layer_registers->stp_rni); |
| 376 | |
| 377 | /* |
| 378 | * The read should guarantee that the first write gets posted |
| 379 | * before the next write |
| 380 | */ |
| 381 | tl_control = readl(&sci_phy->transport_layer_registers->control); |
| 382 | tl_control |= SCU_TLCR_GEN_BIT(CLEAR_TCI_NCQ_MAPPING_TABLE); |
| 383 | writel(tl_control, &sci_phy->transport_layer_registers->control); |
| 384 | } |
| 385 | |
| 386 | /** |
| 387 | * |
| 388 | * @sci_phy: The phy object to be suspended. |
| 389 | * |
| 390 | * This function will perform the register reads/writes to suspend the SCU |
| 391 | * hardware protocol engine. none |
| 392 | */ |
| 393 | static void scic_sds_phy_suspend( |
| 394 | struct scic_sds_phy *sci_phy) |
| 395 | { |
| 396 | u32 scu_sas_pcfg_value; |
| 397 | |
| 398 | scu_sas_pcfg_value = |
| 399 | readl(&sci_phy->link_layer_registers->phy_configuration); |
| 400 | scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(SUSPEND_PROTOCOL_ENGINE); |
| 401 | writel(scu_sas_pcfg_value, |
| 402 | &sci_phy->link_layer_registers->phy_configuration); |
| 403 | |
| 404 | scic_sds_phy_setup_transport( |
| 405 | sci_phy, |
| 406 | SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX); |
| 407 | } |
| 408 | |
| 409 | void scic_sds_phy_resume(struct scic_sds_phy *sci_phy) |
| 410 | { |
| 411 | u32 scu_sas_pcfg_value; |
| 412 | |
| 413 | scu_sas_pcfg_value = |
| 414 | readl(&sci_phy->link_layer_registers->phy_configuration); |
| 415 | scu_sas_pcfg_value &= ~SCU_SAS_PCFG_GEN_BIT(SUSPEND_PROTOCOL_ENGINE); |
| 416 | writel(scu_sas_pcfg_value, |
| 417 | &sci_phy->link_layer_registers->phy_configuration); |
| 418 | } |
| 419 | |
| 420 | void scic_sds_phy_get_sas_address(struct scic_sds_phy *sci_phy, |
| 421 | struct sci_sas_address *sas_address) |
| 422 | { |
| 423 | sas_address->high = readl(&sci_phy->link_layer_registers->source_sas_address_high); |
| 424 | sas_address->low = readl(&sci_phy->link_layer_registers->source_sas_address_low); |
| 425 | } |
| 426 | |
| 427 | void scic_sds_phy_get_attached_sas_address(struct scic_sds_phy *sci_phy, |
| 428 | struct sci_sas_address *sas_address) |
| 429 | { |
| 430 | struct sas_identify_frame *iaf; |
| 431 | struct isci_phy *iphy = sci_phy_to_iphy(sci_phy); |
| 432 | |
| 433 | iaf = &iphy->frame_rcvd.iaf; |
| 434 | memcpy(sas_address, iaf->sas_addr, SAS_ADDR_SIZE); |
| 435 | } |
| 436 | |
| 437 | void scic_sds_phy_get_protocols(struct scic_sds_phy *sci_phy, |
| 438 | struct scic_phy_proto *protocols) |
| 439 | { |
| 440 | protocols->all = |
| 441 | (u16)(readl(&sci_phy-> |
| 442 | link_layer_registers->transmit_identification) & |
| 443 | 0x0000FFFF); |
| 444 | } |
| 445 | |
| 446 | /** |
| 447 | * This method will attempt to start the phy object. This request is only valid |
| 448 | * when the phy is in the stopped state |
| 449 | * @sci_phy: |
| 450 | * |
| 451 | * enum sci_status |
| 452 | */ |
| 453 | enum sci_status scic_sds_phy_start(struct scic_sds_phy *sci_phy) |
| 454 | { |
| 455 | return sci_phy->state_handlers->start_handler(sci_phy); |
| 456 | } |
| 457 | |
| 458 | /** |
| 459 | * This method will attempt to stop the phy object. |
| 460 | * @sci_phy: |
| 461 | * |
| 462 | * enum sci_status SCI_SUCCESS if the phy is going to stop SCI_INVALID_STATE |
| 463 | * if the phy is not in a valid state to stop |
| 464 | */ |
| 465 | enum sci_status scic_sds_phy_stop(struct scic_sds_phy *sci_phy) |
| 466 | { |
| 467 | return sci_phy->state_handlers->stop_handler(sci_phy); |
| 468 | } |
| 469 | |
| 470 | /** |
| 471 | * This method will attempt to reset the phy. This request is only valid when |
| 472 | * the phy is in an ready state |
| 473 | * @sci_phy: |
| 474 | * |
| 475 | * enum sci_status |
| 476 | */ |
| 477 | enum sci_status scic_sds_phy_reset( |
| 478 | struct scic_sds_phy *sci_phy) |
| 479 | { |
| 480 | return sci_phy->state_handlers->reset_handler(sci_phy); |
| 481 | } |
| 482 | |
| 483 | /** |
| 484 | * This method will process the event code received. |
| 485 | * @sci_phy: |
| 486 | * @event_code: |
| 487 | * |
| 488 | * enum sci_status |
| 489 | */ |
| 490 | enum sci_status scic_sds_phy_event_handler( |
| 491 | struct scic_sds_phy *sci_phy, |
| 492 | u32 event_code) |
| 493 | { |
| 494 | return sci_phy->state_handlers->event_handler(sci_phy, event_code); |
| 495 | } |
| 496 | |
| 497 | /** |
| 498 | * This method will process the frame index received. |
| 499 | * @sci_phy: |
| 500 | * @frame_index: |
| 501 | * |
| 502 | * enum sci_status |
| 503 | */ |
| 504 | enum sci_status scic_sds_phy_frame_handler( |
| 505 | struct scic_sds_phy *sci_phy, |
| 506 | u32 frame_index) |
| 507 | { |
| 508 | return sci_phy->state_handlers->frame_handler(sci_phy, frame_index); |
| 509 | } |
| 510 | |
| 511 | /** |
| 512 | * This method will give the phy permission to consume power |
| 513 | * @sci_phy: |
| 514 | * |
| 515 | * enum sci_status |
| 516 | */ |
| 517 | enum sci_status scic_sds_phy_consume_power_handler( |
| 518 | struct scic_sds_phy *sci_phy) |
| 519 | { |
| 520 | return sci_phy->state_handlers->consume_power_handler(sci_phy); |
| 521 | } |
| 522 | |
| 523 | /* |
| 524 | * ***************************************************************************** |
| 525 | * * SCIC SDS PHY HELPER FUNCTIONS |
| 526 | * ***************************************************************************** */ |
| 527 | |
| 528 | |
| 529 | /** |
| 530 | * |
| 531 | * @sci_phy: The phy object that received SAS PHY DETECTED. |
| 532 | * |
| 533 | * This method continues the link training for the phy as if it were a SAS PHY |
| 534 | * instead of a SATA PHY. This is done because the completion queue had a SAS |
| 535 | * PHY DETECTED event when the state machine was expecting a SATA PHY event. |
| 536 | * none |
| 537 | */ |
| 538 | static void scic_sds_phy_start_sas_link_training( |
| 539 | struct scic_sds_phy *sci_phy) |
| 540 | { |
| 541 | u32 phy_control; |
| 542 | |
| 543 | phy_control = |
| 544 | readl(&sci_phy->link_layer_registers->phy_configuration); |
| 545 | phy_control |= SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD); |
| 546 | writel(phy_control, |
| 547 | &sci_phy->link_layer_registers->phy_configuration); |
| 548 | |
| 549 | sci_base_state_machine_change_state( |
| 550 | &sci_phy->starting_substate_machine, |
| 551 | SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_SPEED_EN |
| 552 | ); |
| 553 | |
| 554 | sci_phy->protocol = SCIC_SDS_PHY_PROTOCOL_SAS; |
| 555 | } |
| 556 | |
| 557 | /** |
| 558 | * |
| 559 | * @sci_phy: The phy object that received a SATA SPINUP HOLD event |
| 560 | * |
| 561 | * This method continues the link training for the phy as if it were a SATA PHY |
| 562 | * instead of a SAS PHY. This is done because the completion queue had a SATA |
| 563 | * SPINUP HOLD event when the state machine was expecting a SAS PHY event. none |
| 564 | */ |
| 565 | static void scic_sds_phy_start_sata_link_training( |
| 566 | struct scic_sds_phy *sci_phy) |
| 567 | { |
| 568 | sci_base_state_machine_change_state( |
| 569 | &sci_phy->starting_substate_machine, |
| 570 | SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER |
| 571 | ); |
| 572 | |
| 573 | sci_phy->protocol = SCIC_SDS_PHY_PROTOCOL_SATA; |
| 574 | } |
| 575 | |
| 576 | /** |
| 577 | * scic_sds_phy_complete_link_training - perform processing common to |
| 578 | * all protocols upon completion of link training. |
| 579 | * @sci_phy: This parameter specifies the phy object for which link training |
| 580 | * has completed. |
| 581 | * @max_link_rate: This parameter specifies the maximum link rate to be |
| 582 | * associated with this phy. |
| 583 | * @next_state: This parameter specifies the next state for the phy's starting |
| 584 | * sub-state machine. |
| 585 | * |
| 586 | */ |
| 587 | static void scic_sds_phy_complete_link_training( |
| 588 | struct scic_sds_phy *sci_phy, |
| 589 | enum sas_linkrate max_link_rate, |
| 590 | u32 next_state) |
| 591 | { |
| 592 | sci_phy->max_negotiated_speed = max_link_rate; |
| 593 | |
| 594 | sci_base_state_machine_change_state(&sci_phy->starting_substate_machine, |
| 595 | next_state); |
| 596 | } |
| 597 | |
| 598 | static void scic_sds_phy_restart_starting_state( |
| 599 | struct scic_sds_phy *sci_phy) |
| 600 | { |
| 601 | /* Stop the current substate machine */ |
| 602 | sci_base_state_machine_stop(&sci_phy->starting_substate_machine); |
| 603 | |
| 604 | /* Re-enter the base state machine starting state */ |
| 605 | sci_base_state_machine_change_state(&sci_phy->state_machine, |
| 606 | SCI_BASE_PHY_STATE_STARTING); |
| 607 | } |
| 608 | |
| 609 | /* **************************************************************************** |
| 610 | * SCIC SDS PHY general handlers |
| 611 | ************************************************************************** */ |
| 612 | static enum sci_status scic_sds_phy_starting_substate_general_stop_handler( |
| 613 | struct scic_sds_phy *phy) |
| 614 | { |
| 615 | sci_base_state_machine_stop(&phy->starting_substate_machine); |
| 616 | |
| 617 | sci_base_state_machine_change_state(&phy->state_machine, |
| 618 | SCI_BASE_PHY_STATE_STOPPED); |
| 619 | |
| 620 | return SCI_SUCCESS; |
| 621 | } |
| 622 | |
| 623 | /* |
| 624 | * ***************************************************************************** |
| 625 | * * SCIC SDS PHY EVENT_HANDLERS |
| 626 | * ***************************************************************************** */ |
| 627 | |
| 628 | /** |
| 629 | * |
| 630 | * @phy: This struct scic_sds_phy object which has received an event. |
| 631 | * @event_code: This is the event code which the phy object is to decode. |
| 632 | * |
| 633 | * This method is called when an event notification is received for the phy |
| 634 | * object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SPEED_EN. - |
| 635 | * decode the event - sas phy detected causes a state transition to the wait |
| 636 | * for speed event notification. - any other events log a warning message and |
| 637 | * set a failure status enum sci_status SCI_SUCCESS on any valid event notification |
| 638 | * SCI_FAILURE on any unexpected event notifation |
| 639 | */ |
| 640 | static enum sci_status scic_sds_phy_starting_substate_await_ossp_event_handler( |
| 641 | struct scic_sds_phy *sci_phy, |
| 642 | u32 event_code) |
| 643 | { |
| 644 | u32 result = SCI_SUCCESS; |
| 645 | |
| 646 | switch (scu_get_event_code(event_code)) { |
| 647 | case SCU_EVENT_SAS_PHY_DETECTED: |
| 648 | scic_sds_phy_start_sas_link_training(sci_phy); |
| 649 | sci_phy->is_in_link_training = true; |
| 650 | break; |
| 651 | |
| 652 | case SCU_EVENT_SATA_SPINUP_HOLD: |
| 653 | scic_sds_phy_start_sata_link_training(sci_phy); |
| 654 | sci_phy->is_in_link_training = true; |
| 655 | break; |
| 656 | |
| 657 | default: |
| 658 | dev_dbg(sciphy_to_dev(sci_phy), |
| 659 | "%s: PHY starting substate machine received " |
| 660 | "unexpected event_code %x\n", |
| 661 | __func__, |
| 662 | event_code); |
| 663 | |
| 664 | result = SCI_FAILURE; |
| 665 | break; |
| 666 | } |
| 667 | |
| 668 | return result; |
| 669 | } |
| 670 | |
| 671 | /** |
| 672 | * |
| 673 | * @phy: This struct scic_sds_phy object which has received an event. |
| 674 | * @event_code: This is the event code which the phy object is to decode. |
| 675 | * |
| 676 | * This method is called when an event notification is received for the phy |
| 677 | * object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SPEED_EN. - |
| 678 | * decode the event - sas phy detected returns us back to this state. - speed |
| 679 | * event detected causes a state transition to the wait for iaf. - identify |
| 680 | * timeout is an un-expected event and the state machine is restarted. - link |
| 681 | * failure events restart the starting state machine - any other events log a |
| 682 | * warning message and set a failure status enum sci_status SCI_SUCCESS on any valid |
| 683 | * event notification SCI_FAILURE on any unexpected event notifation |
| 684 | */ |
| 685 | static enum sci_status scic_sds_phy_starting_substate_await_sas_phy_speed_event_handler( |
| 686 | struct scic_sds_phy *sci_phy, |
| 687 | u32 event_code) |
| 688 | { |
| 689 | u32 result = SCI_SUCCESS; |
| 690 | |
| 691 | switch (scu_get_event_code(event_code)) { |
| 692 | case SCU_EVENT_SAS_PHY_DETECTED: |
| 693 | /* |
| 694 | * Why is this being reported again by the controller? |
| 695 | * We would re-enter this state so just stay here */ |
| 696 | break; |
| 697 | |
| 698 | case SCU_EVENT_SAS_15: |
| 699 | case SCU_EVENT_SAS_15_SSC: |
| 700 | scic_sds_phy_complete_link_training( |
| 701 | sci_phy, |
| 702 | SAS_LINK_RATE_1_5_GBPS, |
| 703 | SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF); |
| 704 | break; |
| 705 | |
| 706 | case SCU_EVENT_SAS_30: |
| 707 | case SCU_EVENT_SAS_30_SSC: |
| 708 | scic_sds_phy_complete_link_training( |
| 709 | sci_phy, |
| 710 | SAS_LINK_RATE_3_0_GBPS, |
| 711 | SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF); |
| 712 | break; |
| 713 | |
| 714 | case SCU_EVENT_SAS_60: |
| 715 | case SCU_EVENT_SAS_60_SSC: |
| 716 | scic_sds_phy_complete_link_training( |
| 717 | sci_phy, |
| 718 | SAS_LINK_RATE_6_0_GBPS, |
| 719 | SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF); |
| 720 | break; |
| 721 | |
| 722 | case SCU_EVENT_SATA_SPINUP_HOLD: |
| 723 | /* |
| 724 | * We were doing SAS PHY link training and received a SATA PHY event |
| 725 | * continue OOB/SN as if this were a SATA PHY */ |
| 726 | scic_sds_phy_start_sata_link_training(sci_phy); |
| 727 | break; |
| 728 | |
| 729 | case SCU_EVENT_LINK_FAILURE: |
| 730 | /* Link failure change state back to the starting state */ |
| 731 | scic_sds_phy_restart_starting_state(sci_phy); |
| 732 | break; |
| 733 | |
| 734 | default: |
| 735 | dev_warn(sciphy_to_dev(sci_phy), |
| 736 | "%s: PHY starting substate machine received " |
| 737 | "unexpected event_code %x\n", |
| 738 | __func__, |
| 739 | event_code); |
| 740 | |
| 741 | result = SCI_FAILURE; |
| 742 | break; |
| 743 | } |
| 744 | |
| 745 | return result; |
| 746 | } |
| 747 | |
| 748 | /** |
| 749 | * |
| 750 | * @phy: This struct scic_sds_phy object which has received an event. |
| 751 | * @event_code: This is the event code which the phy object is to decode. |
| 752 | * |
| 753 | * This method is called when an event notification is received for the phy |
| 754 | * object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF. - |
| 755 | * decode the event - sas phy detected event backs up the state machine to the |
| 756 | * await speed notification. - identify timeout is an un-expected event and the |
| 757 | * state machine is restarted. - link failure events restart the starting state |
| 758 | * machine - any other events log a warning message and set a failure status |
| 759 | * enum sci_status SCI_SUCCESS on any valid event notification SCI_FAILURE on any |
| 760 | * unexpected event notifation |
| 761 | */ |
| 762 | static enum sci_status scic_sds_phy_starting_substate_await_iaf_uf_event_handler( |
| 763 | struct scic_sds_phy *sci_phy, |
| 764 | u32 event_code) |
| 765 | { |
| 766 | u32 result = SCI_SUCCESS; |
| 767 | |
| 768 | switch (scu_get_event_code(event_code)) { |
| 769 | case SCU_EVENT_SAS_PHY_DETECTED: |
| 770 | /* Backup the state machine */ |
| 771 | scic_sds_phy_start_sas_link_training(sci_phy); |
| 772 | break; |
| 773 | |
| 774 | case SCU_EVENT_SATA_SPINUP_HOLD: |
| 775 | /* |
| 776 | * We were doing SAS PHY link training and received a SATA PHY event |
| 777 | * continue OOB/SN as if this were a SATA PHY */ |
| 778 | scic_sds_phy_start_sata_link_training(sci_phy); |
| 779 | break; |
| 780 | |
| 781 | case SCU_EVENT_RECEIVED_IDENTIFY_TIMEOUT: |
| 782 | case SCU_EVENT_LINK_FAILURE: |
| 783 | case SCU_EVENT_HARD_RESET_RECEIVED: |
| 784 | /* Start the oob/sn state machine over again */ |
| 785 | scic_sds_phy_restart_starting_state(sci_phy); |
| 786 | break; |
| 787 | |
| 788 | default: |
| 789 | dev_warn(sciphy_to_dev(sci_phy), |
| 790 | "%s: PHY starting substate machine received " |
| 791 | "unexpected event_code %x\n", |
| 792 | __func__, |
| 793 | event_code); |
| 794 | |
| 795 | result = SCI_FAILURE; |
| 796 | break; |
| 797 | } |
| 798 | |
| 799 | return result; |
| 800 | } |
| 801 | |
| 802 | /** |
| 803 | * |
| 804 | * @phy: This struct scic_sds_phy object which has received an event. |
| 805 | * @event_code: This is the event code which the phy object is to decode. |
| 806 | * |
| 807 | * This method is called when an event notification is received for the phy |
| 808 | * object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_POWER. - |
| 809 | * decode the event - link failure events restart the starting state machine - |
| 810 | * any other events log a warning message and set a failure status enum sci_status |
| 811 | * SCI_SUCCESS on a link failure event SCI_FAILURE on any unexpected event |
| 812 | * notifation |
| 813 | */ |
| 814 | static enum sci_status scic_sds_phy_starting_substate_await_sas_power_event_handler( |
| 815 | struct scic_sds_phy *sci_phy, |
| 816 | u32 event_code) |
| 817 | { |
| 818 | u32 result = SCI_SUCCESS; |
| 819 | |
| 820 | switch (scu_get_event_code(event_code)) { |
| 821 | case SCU_EVENT_LINK_FAILURE: |
| 822 | /* Link failure change state back to the starting state */ |
| 823 | scic_sds_phy_restart_starting_state(sci_phy); |
| 824 | break; |
| 825 | |
| 826 | default: |
| 827 | dev_warn(sciphy_to_dev(sci_phy), |
| 828 | "%s: PHY starting substate machine received unexpected " |
| 829 | "event_code %x\n", |
| 830 | __func__, |
| 831 | event_code); |
| 832 | |
| 833 | result = SCI_FAILURE; |
| 834 | break; |
| 835 | } |
| 836 | |
| 837 | return result; |
| 838 | } |
| 839 | |
| 840 | /** |
| 841 | * |
| 842 | * @phy: This struct scic_sds_phy object which has received an event. |
| 843 | * @event_code: This is the event code which the phy object is to decode. |
| 844 | * |
| 845 | * This method is called when an event notification is received for the phy |
| 846 | * object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER. - |
| 847 | * decode the event - link failure events restart the starting state machine - |
| 848 | * sata spinup hold events are ignored since they are expected - any other |
| 849 | * events log a warning message and set a failure status enum sci_status SCI_SUCCESS |
| 850 | * on a link failure event SCI_FAILURE on any unexpected event notifation |
| 851 | */ |
| 852 | static enum sci_status scic_sds_phy_starting_substate_await_sata_power_event_handler( |
| 853 | struct scic_sds_phy *sci_phy, |
| 854 | u32 event_code) |
| 855 | { |
| 856 | u32 result = SCI_SUCCESS; |
| 857 | |
| 858 | switch (scu_get_event_code(event_code)) { |
| 859 | case SCU_EVENT_LINK_FAILURE: |
| 860 | /* Link failure change state back to the starting state */ |
| 861 | scic_sds_phy_restart_starting_state(sci_phy); |
| 862 | break; |
| 863 | |
| 864 | case SCU_EVENT_SATA_SPINUP_HOLD: |
| 865 | /* These events are received every 10ms and are expected while in this state */ |
| 866 | break; |
| 867 | |
| 868 | case SCU_EVENT_SAS_PHY_DETECTED: |
| 869 | /* |
| 870 | * There has been a change in the phy type before OOB/SN for the |
| 871 | * SATA finished start down the SAS link traning path. */ |
| 872 | scic_sds_phy_start_sas_link_training(sci_phy); |
| 873 | break; |
| 874 | |
| 875 | default: |
| 876 | dev_warn(sciphy_to_dev(sci_phy), |
| 877 | "%s: PHY starting substate machine received " |
| 878 | "unexpected event_code %x\n", |
| 879 | __func__, |
| 880 | event_code); |
| 881 | |
| 882 | result = SCI_FAILURE; |
| 883 | break; |
| 884 | } |
| 885 | |
| 886 | return result; |
| 887 | } |
| 888 | |
| 889 | /** |
| 890 | * scic_sds_phy_starting_substate_await_sata_phy_event_handler - |
| 891 | * @phy: This struct scic_sds_phy object which has received an event. |
| 892 | * @event_code: This is the event code which the phy object is to decode. |
| 893 | * |
| 894 | * This method is called when an event notification is received for the phy |
| 895 | * object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN. - |
| 896 | * decode the event - link failure events restart the starting state machine - |
| 897 | * sata spinup hold events are ignored since they are expected - sata phy |
| 898 | * detected event change to the wait speed event - any other events log a |
| 899 | * warning message and set a failure status enum sci_status SCI_SUCCESS on a link |
| 900 | * failure event SCI_FAILURE on any unexpected event notifation |
| 901 | */ |
| 902 | static enum sci_status scic_sds_phy_starting_substate_await_sata_phy_event_handler( |
| 903 | struct scic_sds_phy *sci_phy, u32 event_code) |
| 904 | { |
| 905 | u32 result = SCI_SUCCESS; |
| 906 | |
| 907 | switch (scu_get_event_code(event_code)) { |
| 908 | case SCU_EVENT_LINK_FAILURE: |
| 909 | /* Link failure change state back to the starting state */ |
| 910 | scic_sds_phy_restart_starting_state(sci_phy); |
| 911 | break; |
| 912 | |
| 913 | case SCU_EVENT_SATA_SPINUP_HOLD: |
| 914 | /* These events might be received since we dont know how many may be in |
| 915 | * the completion queue while waiting for power |
| 916 | */ |
| 917 | break; |
| 918 | |
| 919 | case SCU_EVENT_SATA_PHY_DETECTED: |
| 920 | sci_phy->protocol = SCIC_SDS_PHY_PROTOCOL_SATA; |
| 921 | |
| 922 | /* We have received the SATA PHY notification change state */ |
| 923 | sci_base_state_machine_change_state(&sci_phy->starting_substate_machine, |
| 924 | SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN); |
| 925 | break; |
| 926 | |
| 927 | case SCU_EVENT_SAS_PHY_DETECTED: |
| 928 | /* There has been a change in the phy type before OOB/SN for the |
| 929 | * SATA finished start down the SAS link traning path. |
| 930 | */ |
| 931 | scic_sds_phy_start_sas_link_training(sci_phy); |
| 932 | break; |
| 933 | |
| 934 | default: |
| 935 | dev_warn(sciphy_to_dev(sci_phy), |
| 936 | "%s: PHY starting substate machine received " |
| 937 | "unexpected event_code %x\n", |
| 938 | __func__, |
| 939 | event_code); |
| 940 | |
| 941 | result = SCI_FAILURE; |
| 942 | break; |
| 943 | } |
| 944 | |
| 945 | return result; |
| 946 | } |
| 947 | |
| 948 | /** |
| 949 | * |
| 950 | * @phy: This struct scic_sds_phy object which has received an event. |
| 951 | * @event_code: This is the event code which the phy object is to decode. |
| 952 | * |
| 953 | * This method is called when an event notification is received for the phy |
| 954 | * object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN. |
| 955 | * - decode the event - sata phy detected returns us back to this state. - |
| 956 | * speed event detected causes a state transition to the wait for signature. - |
| 957 | * link failure events restart the starting state machine - any other events |
| 958 | * log a warning message and set a failure status enum sci_status SCI_SUCCESS on any |
| 959 | * valid event notification SCI_FAILURE on any unexpected event notifation |
| 960 | */ |
| 961 | static enum sci_status scic_sds_phy_starting_substate_await_sata_speed_event_handler( |
| 962 | struct scic_sds_phy *sci_phy, |
| 963 | u32 event_code) |
| 964 | { |
| 965 | u32 result = SCI_SUCCESS; |
| 966 | |
| 967 | switch (scu_get_event_code(event_code)) { |
| 968 | case SCU_EVENT_SATA_PHY_DETECTED: |
| 969 | /* |
| 970 | * The hardware reports multiple SATA PHY detected events |
| 971 | * ignore the extras */ |
| 972 | break; |
| 973 | |
| 974 | case SCU_EVENT_SATA_15: |
| 975 | case SCU_EVENT_SATA_15_SSC: |
| 976 | scic_sds_phy_complete_link_training( |
| 977 | sci_phy, |
| 978 | SAS_LINK_RATE_1_5_GBPS, |
| 979 | SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF); |
| 980 | break; |
| 981 | |
| 982 | case SCU_EVENT_SATA_30: |
| 983 | case SCU_EVENT_SATA_30_SSC: |
| 984 | scic_sds_phy_complete_link_training( |
| 985 | sci_phy, |
| 986 | SAS_LINK_RATE_3_0_GBPS, |
| 987 | SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF); |
| 988 | break; |
| 989 | |
| 990 | case SCU_EVENT_SATA_60: |
| 991 | case SCU_EVENT_SATA_60_SSC: |
| 992 | scic_sds_phy_complete_link_training( |
| 993 | sci_phy, |
| 994 | SAS_LINK_RATE_6_0_GBPS, |
| 995 | SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF); |
| 996 | break; |
| 997 | |
| 998 | case SCU_EVENT_LINK_FAILURE: |
| 999 | /* Link failure change state back to the starting state */ |
| 1000 | scic_sds_phy_restart_starting_state(sci_phy); |
| 1001 | break; |
| 1002 | |
| 1003 | case SCU_EVENT_SAS_PHY_DETECTED: |
| 1004 | /* |
| 1005 | * There has been a change in the phy type before OOB/SN for the |
| 1006 | * SATA finished start down the SAS link traning path. */ |
| 1007 | scic_sds_phy_start_sas_link_training(sci_phy); |
| 1008 | break; |
| 1009 | |
| 1010 | default: |
| 1011 | dev_warn(sciphy_to_dev(sci_phy), |
| 1012 | "%s: PHY starting substate machine received " |
| 1013 | "unexpected event_code %x\n", |
| 1014 | __func__, |
| 1015 | event_code); |
| 1016 | |
| 1017 | result = SCI_FAILURE; |
| 1018 | break; |
| 1019 | } |
| 1020 | |
| 1021 | return result; |
| 1022 | } |
| 1023 | |
| 1024 | /** |
| 1025 | * scic_sds_phy_starting_substate_await_sig_fis_event_handler - |
| 1026 | * @phy: This struct scic_sds_phy object which has received an event. |
| 1027 | * @event_code: This is the event code which the phy object is to decode. |
| 1028 | * |
| 1029 | * This method is called when an event notification is received for the phy |
| 1030 | * object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF. - |
| 1031 | * decode the event - sas phy detected event backs up the state machine to the |
| 1032 | * await speed notification. - identify timeout is an un-expected event and the |
| 1033 | * state machine is restarted. - link failure events restart the starting state |
| 1034 | * machine - any other events log a warning message and set a failure status |
| 1035 | * enum sci_status SCI_SUCCESS on any valid event notification SCI_FAILURE on any |
| 1036 | * unexpected event notifation |
| 1037 | */ |
| 1038 | static enum sci_status scic_sds_phy_starting_substate_await_sig_fis_event_handler( |
| 1039 | struct scic_sds_phy *sci_phy, u32 event_code) |
| 1040 | { |
| 1041 | u32 result = SCI_SUCCESS; |
| 1042 | |
| 1043 | switch (scu_get_event_code(event_code)) { |
| 1044 | case SCU_EVENT_SATA_PHY_DETECTED: |
| 1045 | /* Backup the state machine */ |
| 1046 | sci_base_state_machine_change_state(&sci_phy->starting_substate_machine, |
| 1047 | SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN); |
| 1048 | break; |
| 1049 | |
| 1050 | case SCU_EVENT_LINK_FAILURE: |
| 1051 | /* Link failure change state back to the starting state */ |
| 1052 | scic_sds_phy_restart_starting_state(sci_phy); |
| 1053 | break; |
| 1054 | |
| 1055 | default: |
| 1056 | dev_warn(sciphy_to_dev(sci_phy), |
| 1057 | "%s: PHY starting substate machine received " |
| 1058 | "unexpected event_code %x\n", |
| 1059 | __func__, |
| 1060 | event_code); |
| 1061 | |
| 1062 | result = SCI_FAILURE; |
| 1063 | break; |
| 1064 | } |
| 1065 | |
| 1066 | return result; |
| 1067 | } |
| 1068 | |
| 1069 | |
| 1070 | /* |
| 1071 | * ***************************************************************************** |
| 1072 | * * SCIC SDS PHY FRAME_HANDLERS |
| 1073 | * ***************************************************************************** */ |
| 1074 | |
| 1075 | /** |
| 1076 | * |
| 1077 | * @phy: This is struct scic_sds_phy object which is being requested to decode the |
| 1078 | * frame data. |
| 1079 | * @frame_index: This is the index of the unsolicited frame which was received |
| 1080 | * for this phy. |
| 1081 | * |
| 1082 | * This method decodes the unsolicited frame when the struct scic_sds_phy is in the |
| 1083 | * SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF. - Get the UF Header - If the UF |
| 1084 | * is an IAF - Copy IAF data to local phy object IAF data buffer. - Change |
| 1085 | * starting substate to wait power. - else - log warning message of unexpected |
| 1086 | * unsolicted frame - release frame buffer enum sci_status SCI_SUCCESS |
| 1087 | */ |
| 1088 | static enum sci_status scic_sds_phy_starting_substate_await_iaf_uf_frame_handler( |
| 1089 | struct scic_sds_phy *sci_phy, u32 frame_index) |
| 1090 | { |
| 1091 | enum sci_status result; |
| 1092 | u32 *frame_words; |
| 1093 | struct sas_identify_frame iaf; |
| 1094 | struct isci_phy *iphy = sci_phy_to_iphy(sci_phy); |
| 1095 | |
| 1096 | result = scic_sds_unsolicited_frame_control_get_header( |
| 1097 | &(scic_sds_phy_get_controller(sci_phy)->uf_control), |
| 1098 | frame_index, |
| 1099 | (void **)&frame_words); |
| 1100 | |
| 1101 | if (result != SCI_SUCCESS) |
| 1102 | return result; |
| 1103 | |
| 1104 | sci_swab32_cpy(&iaf, frame_words, sizeof(iaf) / sizeof(u32)); |
| 1105 | if (iaf.frame_type == 0) { |
| 1106 | u32 state; |
| 1107 | |
| 1108 | memcpy(&iphy->frame_rcvd.iaf, &iaf, sizeof(iaf)); |
| 1109 | if (iaf.smp_tport) { |
| 1110 | /* We got the IAF for an expander PHY go to the final |
| 1111 | * state since there are no power requirements for |
| 1112 | * expander phys. |
| 1113 | */ |
| 1114 | state = SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL; |
| 1115 | } else { |
| 1116 | /* We got the IAF we can now go to the await spinup |
| 1117 | * semaphore state |
| 1118 | */ |
| 1119 | state = SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_POWER; |
| 1120 | } |
| 1121 | sci_base_state_machine_change_state( |
| 1122 | &sci_phy->starting_substate_machine, |
| 1123 | state); |
| 1124 | result = SCI_SUCCESS; |
| 1125 | } else |
| 1126 | dev_warn(sciphy_to_dev(sci_phy), |
| 1127 | "%s: PHY starting substate machine received " |
| 1128 | "unexpected frame id %x\n", |
| 1129 | __func__, |
| 1130 | frame_index); |
| 1131 | |
| 1132 | scic_sds_controller_release_frame(scic_sds_phy_get_controller(sci_phy), |
| 1133 | frame_index); |
| 1134 | |
| 1135 | return result; |
| 1136 | } |
| 1137 | |
| 1138 | /** |
| 1139 | * |
| 1140 | * @phy: This is struct scic_sds_phy object which is being requested to decode the |
| 1141 | * frame data. |
| 1142 | * @frame_index: This is the index of the unsolicited frame which was received |
| 1143 | * for this phy. |
| 1144 | * |
| 1145 | * This method decodes the unsolicited frame when the struct scic_sds_phy is in the |
| 1146 | * SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF. - Get the UF Header - If |
| 1147 | * the UF is an SIGNATURE FIS - Copy IAF data to local phy object SIGNATURE FIS |
| 1148 | * data buffer. - else - log warning message of unexpected unsolicted frame - |
| 1149 | * release frame buffer enum sci_status SCI_SUCCESS Must decode the SIGNATURE FIS |
| 1150 | * data |
| 1151 | */ |
| 1152 | static enum sci_status scic_sds_phy_starting_substate_await_sig_fis_frame_handler( |
| 1153 | struct scic_sds_phy *sci_phy, |
| 1154 | u32 frame_index) |
| 1155 | { |
| 1156 | enum sci_status result; |
| 1157 | struct dev_to_host_fis *frame_header; |
| 1158 | u32 *fis_frame_data; |
| 1159 | struct isci_phy *iphy = sci_phy_to_iphy(sci_phy); |
| 1160 | |
| 1161 | result = scic_sds_unsolicited_frame_control_get_header( |
| 1162 | &(scic_sds_phy_get_controller(sci_phy)->uf_control), |
| 1163 | frame_index, |
| 1164 | (void **)&frame_header); |
| 1165 | |
| 1166 | if (result != SCI_SUCCESS) |
| 1167 | return result; |
| 1168 | |
| 1169 | if ((frame_header->fis_type == FIS_REGD2H) && |
| 1170 | !(frame_header->status & ATA_BUSY)) { |
| 1171 | scic_sds_unsolicited_frame_control_get_buffer( |
| 1172 | &(scic_sds_phy_get_controller(sci_phy)->uf_control), |
| 1173 | frame_index, |
| 1174 | (void **)&fis_frame_data); |
| 1175 | |
| 1176 | scic_sds_controller_copy_sata_response(&iphy->frame_rcvd.fis, |
| 1177 | frame_header, |
| 1178 | fis_frame_data); |
| 1179 | |
| 1180 | /* got IAF we can now go to the await spinup semaphore state */ |
| 1181 | sci_base_state_machine_change_state(&sci_phy->starting_substate_machine, |
| 1182 | SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL); |
| 1183 | |
| 1184 | result = SCI_SUCCESS; |
| 1185 | } else |
| 1186 | dev_warn(sciphy_to_dev(sci_phy), |
| 1187 | "%s: PHY starting substate machine received " |
| 1188 | "unexpected frame id %x\n", |
| 1189 | __func__, |
| 1190 | frame_index); |
| 1191 | |
| 1192 | /* Regardless of the result we are done with this frame with it */ |
| 1193 | scic_sds_controller_release_frame(scic_sds_phy_get_controller(sci_phy), |
| 1194 | frame_index); |
| 1195 | |
| 1196 | return result; |
| 1197 | } |
| 1198 | |
| 1199 | /* |
| 1200 | * ***************************************************************************** |
| 1201 | * * SCIC SDS PHY POWER_HANDLERS |
| 1202 | * ***************************************************************************** */ |
| 1203 | |
| 1204 | /* |
| 1205 | * This method is called by the struct scic_sds_controller when the phy object is |
| 1206 | * granted power. - The notify enable spinups are turned on for this phy object |
| 1207 | * - The phy state machine is transitioned to the |
| 1208 | * SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL. enum sci_status SCI_SUCCESS |
| 1209 | */ |
| 1210 | static enum sci_status scic_sds_phy_starting_substate_await_sas_power_consume_power_handler( |
| 1211 | struct scic_sds_phy *sci_phy) |
| 1212 | { |
| 1213 | u32 enable_spinup; |
| 1214 | |
| 1215 | enable_spinup = readl(&sci_phy->link_layer_registers->notify_enable_spinup_control); |
| 1216 | enable_spinup |= SCU_ENSPINUP_GEN_BIT(ENABLE); |
| 1217 | writel(enable_spinup, &sci_phy->link_layer_registers->notify_enable_spinup_control); |
| 1218 | |
| 1219 | /* Change state to the final state this substate machine has run to completion */ |
| 1220 | sci_base_state_machine_change_state(&sci_phy->starting_substate_machine, |
| 1221 | SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL); |
| 1222 | |
| 1223 | return SCI_SUCCESS; |
| 1224 | } |
| 1225 | |
| 1226 | /* |
| 1227 | * This method is called by the struct scic_sds_controller when the phy object is |
| 1228 | * granted power. - The phy state machine is transitioned to the |
| 1229 | * SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN. enum sci_status SCI_SUCCESS |
| 1230 | */ |
| 1231 | static enum sci_status scic_sds_phy_starting_substate_await_sata_power_consume_power_handler( |
| 1232 | struct scic_sds_phy *sci_phy) |
| 1233 | { |
| 1234 | u32 scu_sas_pcfg_value; |
| 1235 | |
| 1236 | /* Release the spinup hold state and reset the OOB state machine */ |
| 1237 | scu_sas_pcfg_value = |
| 1238 | readl(&sci_phy->link_layer_registers->phy_configuration); |
| 1239 | scu_sas_pcfg_value &= |
| 1240 | ~(SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD) | SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE)); |
| 1241 | scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_RESET); |
| 1242 | writel(scu_sas_pcfg_value, |
| 1243 | &sci_phy->link_layer_registers->phy_configuration); |
| 1244 | |
| 1245 | /* Now restart the OOB operation */ |
| 1246 | scu_sas_pcfg_value &= ~SCU_SAS_PCFG_GEN_BIT(OOB_RESET); |
| 1247 | scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE); |
| 1248 | writel(scu_sas_pcfg_value, |
| 1249 | &sci_phy->link_layer_registers->phy_configuration); |
| 1250 | |
| 1251 | /* Change state to the final state this substate machine has run to completion */ |
| 1252 | sci_base_state_machine_change_state(&sci_phy->starting_substate_machine, |
| 1253 | SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN); |
| 1254 | |
| 1255 | return SCI_SUCCESS; |
| 1256 | } |
| 1257 | |
| 1258 | static enum sci_status default_phy_handler(struct scic_sds_phy *sci_phy, |
| 1259 | const char *func) |
| 1260 | { |
| 1261 | dev_dbg(sciphy_to_dev(sci_phy), |
| 1262 | "%s: in wrong state: %d\n", func, |
| 1263 | sci_base_state_machine_get_state(&sci_phy->state_machine)); |
| 1264 | return SCI_FAILURE_INVALID_STATE; |
| 1265 | } |
| 1266 | |
| 1267 | static enum sci_status |
| 1268 | scic_sds_phy_default_start_handler(struct scic_sds_phy *sci_phy) |
| 1269 | { |
| 1270 | return default_phy_handler(sci_phy, __func__); |
| 1271 | } |
| 1272 | |
| 1273 | static enum sci_status |
| 1274 | scic_sds_phy_default_stop_handler(struct scic_sds_phy *sci_phy) |
| 1275 | { |
| 1276 | return default_phy_handler(sci_phy, __func__); |
| 1277 | } |
| 1278 | |
| 1279 | static enum sci_status |
| 1280 | scic_sds_phy_default_reset_handler(struct scic_sds_phy *sci_phy) |
| 1281 | { |
| 1282 | return default_phy_handler(sci_phy, __func__); |
| 1283 | } |
| 1284 | |
| 1285 | static enum sci_status |
| 1286 | scic_sds_phy_default_destroy_handler(struct scic_sds_phy *sci_phy) |
| 1287 | { |
| 1288 | return default_phy_handler(sci_phy, __func__); |
| 1289 | } |
| 1290 | |
| 1291 | static enum sci_status |
| 1292 | scic_sds_phy_default_frame_handler(struct scic_sds_phy *sci_phy, |
| 1293 | u32 frame_index) |
| 1294 | { |
| 1295 | struct scic_sds_controller *scic = scic_sds_phy_get_controller(sci_phy); |
| 1296 | |
| 1297 | default_phy_handler(sci_phy, __func__); |
| 1298 | scic_sds_controller_release_frame(scic, frame_index); |
| 1299 | |
| 1300 | return SCI_FAILURE_INVALID_STATE; |
| 1301 | } |
| 1302 | |
| 1303 | static enum sci_status |
| 1304 | scic_sds_phy_default_event_handler(struct scic_sds_phy *sci_phy, |
| 1305 | u32 event_code) |
| 1306 | { |
| 1307 | return default_phy_handler(sci_phy, __func__); |
| 1308 | } |
| 1309 | |
| 1310 | static enum sci_status |
| 1311 | scic_sds_phy_default_consume_power_handler(struct scic_sds_phy *sci_phy) |
| 1312 | { |
| 1313 | return default_phy_handler(sci_phy, __func__); |
| 1314 | } |
| 1315 | |
| 1316 | |
| 1317 | |
| 1318 | static const struct scic_sds_phy_state_handler scic_sds_phy_starting_substate_handler_table[] = { |
| 1319 | [SCIC_SDS_PHY_STARTING_SUBSTATE_INITIAL] = { |
| 1320 | .start_handler = scic_sds_phy_default_start_handler, |
| 1321 | .stop_handler = scic_sds_phy_starting_substate_general_stop_handler, |
| 1322 | .reset_handler = scic_sds_phy_default_reset_handler, |
| 1323 | .destruct_handler = scic_sds_phy_default_destroy_handler, |
| 1324 | .frame_handler = scic_sds_phy_default_frame_handler, |
| 1325 | .event_handler = scic_sds_phy_default_event_handler, |
| 1326 | .consume_power_handler = scic_sds_phy_default_consume_power_handler |
| 1327 | }, |
| 1328 | [SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_OSSP_EN] = { |
| 1329 | .start_handler = scic_sds_phy_default_start_handler, |
| 1330 | .stop_handler = scic_sds_phy_starting_substate_general_stop_handler, |
| 1331 | .reset_handler = scic_sds_phy_default_reset_handler, |
| 1332 | .destruct_handler = scic_sds_phy_default_destroy_handler, |
| 1333 | .frame_handler = scic_sds_phy_default_frame_handler, |
| 1334 | .event_handler = scic_sds_phy_starting_substate_await_ossp_event_handler, |
| 1335 | .consume_power_handler = scic_sds_phy_default_consume_power_handler |
| 1336 | }, |
| 1337 | [SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_SPEED_EN] = { |
| 1338 | .start_handler = scic_sds_phy_default_start_handler, |
| 1339 | .stop_handler = scic_sds_phy_starting_substate_general_stop_handler, |
| 1340 | .reset_handler = scic_sds_phy_default_reset_handler, |
| 1341 | .destruct_handler = scic_sds_phy_default_destroy_handler, |
| 1342 | .frame_handler = scic_sds_phy_default_frame_handler, |
| 1343 | .event_handler = scic_sds_phy_starting_substate_await_sas_phy_speed_event_handler, |
| 1344 | .consume_power_handler = scic_sds_phy_default_consume_power_handler |
| 1345 | }, |
| 1346 | [SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF] = { |
| 1347 | .start_handler = scic_sds_phy_default_start_handler, |
| 1348 | .stop_handler = scic_sds_phy_default_stop_handler, |
| 1349 | .reset_handler = scic_sds_phy_default_reset_handler, |
| 1350 | .destruct_handler = scic_sds_phy_default_destroy_handler, |
| 1351 | .frame_handler = scic_sds_phy_starting_substate_await_iaf_uf_frame_handler, |
| 1352 | .event_handler = scic_sds_phy_starting_substate_await_iaf_uf_event_handler, |
| 1353 | .consume_power_handler = scic_sds_phy_default_consume_power_handler |
| 1354 | }, |
| 1355 | [SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_POWER] = { |
| 1356 | .start_handler = scic_sds_phy_default_start_handler, |
| 1357 | .stop_handler = scic_sds_phy_starting_substate_general_stop_handler, |
| 1358 | .reset_handler = scic_sds_phy_default_reset_handler, |
| 1359 | .destruct_handler = scic_sds_phy_default_destroy_handler, |
| 1360 | .frame_handler = scic_sds_phy_default_frame_handler, |
| 1361 | .event_handler = scic_sds_phy_starting_substate_await_sas_power_event_handler, |
| 1362 | .consume_power_handler = scic_sds_phy_starting_substate_await_sas_power_consume_power_handler |
| 1363 | }, |
| 1364 | [SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER] = { |
| 1365 | .start_handler = scic_sds_phy_default_start_handler, |
| 1366 | .stop_handler = scic_sds_phy_starting_substate_general_stop_handler, |
| 1367 | .reset_handler = scic_sds_phy_default_reset_handler, |
| 1368 | .destruct_handler = scic_sds_phy_default_destroy_handler, |
| 1369 | .frame_handler = scic_sds_phy_default_frame_handler, |
| 1370 | .event_handler = scic_sds_phy_starting_substate_await_sata_power_event_handler, |
| 1371 | .consume_power_handler = scic_sds_phy_starting_substate_await_sata_power_consume_power_handler |
| 1372 | }, |
| 1373 | [SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN] = { |
| 1374 | .start_handler = scic_sds_phy_default_start_handler, |
| 1375 | .stop_handler = scic_sds_phy_starting_substate_general_stop_handler, |
| 1376 | .reset_handler = scic_sds_phy_default_reset_handler, |
| 1377 | .destruct_handler = scic_sds_phy_default_destroy_handler, |
| 1378 | .frame_handler = scic_sds_phy_default_frame_handler, |
| 1379 | .event_handler = scic_sds_phy_starting_substate_await_sata_phy_event_handler, |
| 1380 | .consume_power_handler = scic_sds_phy_default_consume_power_handler |
| 1381 | }, |
| 1382 | [SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN] = { |
| 1383 | .start_handler = scic_sds_phy_default_start_handler, |
| 1384 | .stop_handler = scic_sds_phy_starting_substate_general_stop_handler, |
| 1385 | .reset_handler = scic_sds_phy_default_reset_handler, |
| 1386 | .destruct_handler = scic_sds_phy_default_destroy_handler, |
| 1387 | .frame_handler = scic_sds_phy_default_frame_handler, |
| 1388 | .event_handler = scic_sds_phy_starting_substate_await_sata_speed_event_handler, |
| 1389 | .consume_power_handler = scic_sds_phy_default_consume_power_handler |
| 1390 | }, |
| 1391 | [SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF] = { |
| 1392 | .start_handler = scic_sds_phy_default_start_handler, |
| 1393 | .stop_handler = scic_sds_phy_starting_substate_general_stop_handler, |
| 1394 | .reset_handler = scic_sds_phy_default_reset_handler, |
| 1395 | .destruct_handler = scic_sds_phy_default_destroy_handler, |
| 1396 | .frame_handler = scic_sds_phy_starting_substate_await_sig_fis_frame_handler, |
| 1397 | .event_handler = scic_sds_phy_starting_substate_await_sig_fis_event_handler, |
| 1398 | .consume_power_handler = scic_sds_phy_default_consume_power_handler |
| 1399 | }, |
| 1400 | [SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL] = { |
| 1401 | .start_handler = scic_sds_phy_default_start_handler, |
| 1402 | .stop_handler = scic_sds_phy_starting_substate_general_stop_handler, |
| 1403 | .reset_handler = scic_sds_phy_default_reset_handler, |
| 1404 | .destruct_handler = scic_sds_phy_default_destroy_handler, |
| 1405 | .frame_handler = scic_sds_phy_default_frame_handler, |
| 1406 | .event_handler = scic_sds_phy_default_event_handler, |
| 1407 | .consume_power_handler = scic_sds_phy_default_consume_power_handler |
| 1408 | } |
| 1409 | }; |
| 1410 | |
| 1411 | /** |
| 1412 | * scic_sds_phy_set_starting_substate_handlers() - |
| 1413 | * |
| 1414 | * This macro sets the starting substate handlers by state_id |
| 1415 | */ |
| 1416 | #define scic_sds_phy_set_starting_substate_handlers(phy, state_id) \ |
| 1417 | scic_sds_phy_set_state_handlers(\ |
| 1418 | (phy), \ |
| 1419 | &scic_sds_phy_starting_substate_handler_table[(state_id)] \ |
| 1420 | ) |
| 1421 | |
| 1422 | /* |
| 1423 | * **************************************************************************** |
| 1424 | * * PHY STARTING SUBSTATE METHODS |
| 1425 | * **************************************************************************** */ |
| 1426 | |
| 1427 | /** |
| 1428 | * scic_sds_phy_starting_initial_substate_enter - |
| 1429 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 1430 | * |
| 1431 | * This method will perform the actions required by the struct scic_sds_phy on |
| 1432 | * entering the SCIC_SDS_PHY_STARTING_SUBSTATE_INITIAL. - The initial state |
| 1433 | * handlers are put in place for the struct scic_sds_phy object. - The state is |
| 1434 | * changed to the wait phy type event notification. none |
| 1435 | */ |
| 1436 | static void scic_sds_phy_starting_initial_substate_enter(void *object) |
| 1437 | { |
| 1438 | struct scic_sds_phy *sci_phy = object; |
| 1439 | |
| 1440 | scic_sds_phy_set_starting_substate_handlers( |
| 1441 | sci_phy, SCIC_SDS_PHY_STARTING_SUBSTATE_INITIAL); |
| 1442 | |
| 1443 | /* This is just an temporary state go off to the starting state */ |
| 1444 | sci_base_state_machine_change_state(&sci_phy->starting_substate_machine, |
| 1445 | SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_OSSP_EN); |
| 1446 | } |
| 1447 | |
| 1448 | /** |
| 1449 | * |
| 1450 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 1451 | * |
| 1452 | * This method will perform the actions required by the struct scic_sds_phy on |
| 1453 | * entering the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_PHY_TYPE_EN. - Set the |
| 1454 | * struct scic_sds_phy object state handlers for this state. none |
| 1455 | */ |
| 1456 | static void scic_sds_phy_starting_await_ossp_en_substate_enter(void *object) |
| 1457 | { |
| 1458 | struct scic_sds_phy *sci_phy = object; |
| 1459 | |
| 1460 | scic_sds_phy_set_starting_substate_handlers( |
| 1461 | sci_phy, SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_OSSP_EN |
| 1462 | ); |
| 1463 | } |
| 1464 | |
| 1465 | /** |
| 1466 | * |
| 1467 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 1468 | * |
| 1469 | * This method will perform the actions required by the struct scic_sds_phy on |
| 1470 | * entering the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SPEED_EN. - Set the |
| 1471 | * struct scic_sds_phy object state handlers for this state. none |
| 1472 | */ |
| 1473 | static void scic_sds_phy_starting_await_sas_speed_en_substate_enter( |
| 1474 | void *object) |
| 1475 | { |
| 1476 | struct scic_sds_phy *sci_phy = object; |
| 1477 | |
| 1478 | scic_sds_phy_set_starting_substate_handlers( |
| 1479 | sci_phy, SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_SPEED_EN |
| 1480 | ); |
| 1481 | } |
| 1482 | |
| 1483 | /** |
| 1484 | * |
| 1485 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 1486 | * |
| 1487 | * This method will perform the actions required by the struct scic_sds_phy on |
| 1488 | * entering the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF. - Set the |
| 1489 | * struct scic_sds_phy object state handlers for this state. none |
| 1490 | */ |
| 1491 | static void scic_sds_phy_starting_await_iaf_uf_substate_enter(void *object) |
| 1492 | { |
| 1493 | struct scic_sds_phy *sci_phy = object; |
| 1494 | |
| 1495 | scic_sds_phy_set_starting_substate_handlers( |
| 1496 | sci_phy, SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF |
| 1497 | ); |
| 1498 | } |
| 1499 | |
| 1500 | /** |
| 1501 | * |
| 1502 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 1503 | * |
| 1504 | * This method will perform the actions required by the struct scic_sds_phy on |
| 1505 | * entering the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_POWER. - Set the |
| 1506 | * struct scic_sds_phy object state handlers for this state. - Add this phy object to |
| 1507 | * the power control queue none |
| 1508 | */ |
| 1509 | static void scic_sds_phy_starting_await_sas_power_substate_enter(void *object) |
| 1510 | { |
| 1511 | struct scic_sds_phy *sci_phy = object; |
| 1512 | |
| 1513 | scic_sds_phy_set_starting_substate_handlers( |
| 1514 | sci_phy, SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_POWER |
| 1515 | ); |
| 1516 | |
| 1517 | scic_sds_controller_power_control_queue_insert( |
| 1518 | scic_sds_phy_get_controller(sci_phy), |
| 1519 | sci_phy |
| 1520 | ); |
| 1521 | } |
| 1522 | |
| 1523 | /** |
| 1524 | * |
| 1525 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 1526 | * |
| 1527 | * This method will perform the actions required by the struct scic_sds_phy on exiting |
| 1528 | * the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_POWER. - Remove the |
| 1529 | * struct scic_sds_phy object from the power control queue. none |
| 1530 | */ |
| 1531 | static void scic_sds_phy_starting_await_sas_power_substate_exit(void *object) |
| 1532 | { |
| 1533 | struct scic_sds_phy *sci_phy = object; |
| 1534 | |
| 1535 | scic_sds_controller_power_control_queue_remove( |
| 1536 | scic_sds_phy_get_controller(sci_phy), sci_phy |
| 1537 | ); |
| 1538 | } |
| 1539 | |
| 1540 | /** |
| 1541 | * |
| 1542 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 1543 | * |
| 1544 | * This method will perform the actions required by the struct scic_sds_phy on |
| 1545 | * entering the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER. - Set the |
| 1546 | * struct scic_sds_phy object state handlers for this state. - Add this phy object to |
| 1547 | * the power control queue none |
| 1548 | */ |
| 1549 | static void scic_sds_phy_starting_await_sata_power_substate_enter(void *object) |
| 1550 | { |
| 1551 | struct scic_sds_phy *sci_phy = object; |
| 1552 | |
| 1553 | scic_sds_phy_set_starting_substate_handlers( |
| 1554 | sci_phy, SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER |
| 1555 | ); |
| 1556 | |
| 1557 | scic_sds_controller_power_control_queue_insert( |
| 1558 | scic_sds_phy_get_controller(sci_phy), |
| 1559 | sci_phy |
| 1560 | ); |
| 1561 | } |
| 1562 | |
| 1563 | /** |
| 1564 | * |
| 1565 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 1566 | * |
| 1567 | * This method will perform the actions required by the struct scic_sds_phy on exiting |
| 1568 | * the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER. - Remove the |
| 1569 | * struct scic_sds_phy object from the power control queue. none |
| 1570 | */ |
| 1571 | static void scic_sds_phy_starting_await_sata_power_substate_exit(void *object) |
| 1572 | { |
| 1573 | struct scic_sds_phy *sci_phy = object; |
| 1574 | |
| 1575 | scic_sds_controller_power_control_queue_remove( |
| 1576 | scic_sds_phy_get_controller(sci_phy), |
| 1577 | sci_phy |
| 1578 | ); |
| 1579 | } |
| 1580 | |
| 1581 | /** |
| 1582 | * |
| 1583 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 1584 | * |
| 1585 | * This function will perform the actions required by the struct scic_sds_phy on |
| 1586 | * entering the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN. - Set the |
| 1587 | * struct scic_sds_phy object state handlers for this state. none |
| 1588 | */ |
| 1589 | static void scic_sds_phy_starting_await_sata_phy_substate_enter(void *object) |
| 1590 | { |
| 1591 | struct scic_sds_phy *sci_phy = object; |
| 1592 | |
| 1593 | scic_sds_phy_set_starting_substate_handlers( |
| 1594 | sci_phy, |
| 1595 | SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN); |
| 1596 | |
| 1597 | isci_timer_start(sci_phy->sata_timeout_timer, |
| 1598 | SCIC_SDS_SATA_LINK_TRAINING_TIMEOUT); |
| 1599 | } |
| 1600 | |
| 1601 | /** |
| 1602 | * |
| 1603 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 1604 | * |
| 1605 | * This method will perform the actions required by the struct scic_sds_phy |
| 1606 | * on exiting |
| 1607 | * the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN. - stop the timer |
| 1608 | * that was started on entry to await sata phy event notification none |
| 1609 | */ |
| 1610 | static inline void scic_sds_phy_starting_await_sata_phy_substate_exit( |
| 1611 | void *object) |
| 1612 | { |
| 1613 | struct scic_sds_phy *sci_phy = object; |
| 1614 | |
| 1615 | isci_timer_stop(sci_phy->sata_timeout_timer); |
| 1616 | } |
| 1617 | |
| 1618 | /** |
| 1619 | * |
| 1620 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 1621 | * |
| 1622 | * This method will perform the actions required by the struct scic_sds_phy on |
| 1623 | * entering the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN. - Set the |
| 1624 | * struct scic_sds_phy object state handlers for this state. none |
| 1625 | */ |
| 1626 | static void scic_sds_phy_starting_await_sata_speed_substate_enter(void *object) |
| 1627 | { |
| 1628 | struct scic_sds_phy *sci_phy = object; |
| 1629 | |
| 1630 | scic_sds_phy_set_starting_substate_handlers( |
| 1631 | sci_phy, |
| 1632 | SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN); |
| 1633 | |
| 1634 | isci_timer_start(sci_phy->sata_timeout_timer, |
| 1635 | SCIC_SDS_SATA_LINK_TRAINING_TIMEOUT); |
| 1636 | } |
| 1637 | |
| 1638 | /** |
| 1639 | * |
| 1640 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 1641 | * |
| 1642 | * This function will perform the actions required by the |
| 1643 | * struct scic_sds_phy on exiting |
| 1644 | * the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN. - stop the timer |
| 1645 | * that was started on entry to await sata phy event notification none |
| 1646 | */ |
| 1647 | static inline void scic_sds_phy_starting_await_sata_speed_substate_exit( |
| 1648 | void *object) |
| 1649 | { |
| 1650 | struct scic_sds_phy *sci_phy = object; |
| 1651 | |
| 1652 | isci_timer_stop(sci_phy->sata_timeout_timer); |
| 1653 | } |
| 1654 | |
| 1655 | /** |
| 1656 | * |
| 1657 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 1658 | * |
| 1659 | * This function will perform the actions required by the struct scic_sds_phy on |
| 1660 | * entering the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF. - Set the |
| 1661 | * struct scic_sds_phy object state handlers for this state. |
| 1662 | * - Start the SIGNATURE FIS |
| 1663 | * timeout timer none |
| 1664 | */ |
| 1665 | static void scic_sds_phy_starting_await_sig_fis_uf_substate_enter(void *object) |
| 1666 | { |
| 1667 | bool continue_to_ready_state; |
| 1668 | struct scic_sds_phy *sci_phy = object; |
| 1669 | |
| 1670 | scic_sds_phy_set_starting_substate_handlers( |
| 1671 | sci_phy, |
| 1672 | SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF); |
| 1673 | |
| 1674 | continue_to_ready_state = scic_sds_port_link_detected( |
| 1675 | sci_phy->owning_port, |
| 1676 | sci_phy); |
| 1677 | |
| 1678 | if (continue_to_ready_state) { |
| 1679 | /* |
| 1680 | * Clear the PE suspend condition so we can actually |
| 1681 | * receive SIG FIS |
| 1682 | * The hardware will not respond to the XRDY until the PE |
| 1683 | * suspend condition is cleared. |
| 1684 | */ |
| 1685 | scic_sds_phy_resume(sci_phy); |
| 1686 | |
| 1687 | isci_timer_start(sci_phy->sata_timeout_timer, |
| 1688 | SCIC_SDS_SIGNATURE_FIS_TIMEOUT); |
| 1689 | } else |
| 1690 | sci_phy->is_in_link_training = false; |
| 1691 | } |
| 1692 | |
| 1693 | /** |
| 1694 | * |
| 1695 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 1696 | * |
| 1697 | * This function will perform the actions required by the |
| 1698 | * struct scic_sds_phy on exiting |
| 1699 | * the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF. - Stop the SIGNATURE |
| 1700 | * FIS timeout timer. none |
| 1701 | */ |
| 1702 | static inline void scic_sds_phy_starting_await_sig_fis_uf_substate_exit( |
| 1703 | void *object) |
| 1704 | { |
| 1705 | struct scic_sds_phy *sci_phy = object; |
| 1706 | |
| 1707 | isci_timer_stop(sci_phy->sata_timeout_timer); |
| 1708 | } |
| 1709 | |
| 1710 | /** |
| 1711 | * |
| 1712 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 1713 | * |
| 1714 | * This method will perform the actions required by the struct scic_sds_phy on |
| 1715 | * entering the SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL. - Set the struct scic_sds_phy |
| 1716 | * object state handlers for this state. - Change base state machine to the |
| 1717 | * ready state. none |
| 1718 | */ |
| 1719 | static void scic_sds_phy_starting_final_substate_enter(void *object) |
| 1720 | { |
| 1721 | struct scic_sds_phy *sci_phy = object; |
| 1722 | |
| 1723 | scic_sds_phy_set_starting_substate_handlers(sci_phy, |
| 1724 | SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL); |
| 1725 | |
| 1726 | /* State machine has run to completion so exit out and change |
| 1727 | * the base state machine to the ready state |
| 1728 | */ |
| 1729 | sci_base_state_machine_change_state(&sci_phy->state_machine, |
| 1730 | SCI_BASE_PHY_STATE_READY); |
| 1731 | } |
| 1732 | |
| 1733 | /* --------------------------------------------------------------------------- */ |
| 1734 | |
| 1735 | static const struct sci_base_state scic_sds_phy_starting_substates[] = { |
| 1736 | [SCIC_SDS_PHY_STARTING_SUBSTATE_INITIAL] = { |
| 1737 | .enter_state = scic_sds_phy_starting_initial_substate_enter, |
| 1738 | }, |
| 1739 | [SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_OSSP_EN] = { |
| 1740 | .enter_state = scic_sds_phy_starting_await_ossp_en_substate_enter, |
| 1741 | }, |
| 1742 | [SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_SPEED_EN] = { |
| 1743 | .enter_state = scic_sds_phy_starting_await_sas_speed_en_substate_enter, |
| 1744 | }, |
| 1745 | [SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF] = { |
| 1746 | .enter_state = scic_sds_phy_starting_await_iaf_uf_substate_enter, |
| 1747 | }, |
| 1748 | [SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_POWER] = { |
| 1749 | .enter_state = scic_sds_phy_starting_await_sas_power_substate_enter, |
| 1750 | .exit_state = scic_sds_phy_starting_await_sas_power_substate_exit, |
| 1751 | }, |
| 1752 | [SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER] = { |
| 1753 | .enter_state = scic_sds_phy_starting_await_sata_power_substate_enter, |
| 1754 | .exit_state = scic_sds_phy_starting_await_sata_power_substate_exit |
| 1755 | }, |
| 1756 | [SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN] = { |
| 1757 | .enter_state = scic_sds_phy_starting_await_sata_phy_substate_enter, |
| 1758 | .exit_state = scic_sds_phy_starting_await_sata_phy_substate_exit |
| 1759 | }, |
| 1760 | [SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN] = { |
| 1761 | .enter_state = scic_sds_phy_starting_await_sata_speed_substate_enter, |
| 1762 | .exit_state = scic_sds_phy_starting_await_sata_speed_substate_exit |
| 1763 | }, |
| 1764 | [SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF] = { |
| 1765 | .enter_state = scic_sds_phy_starting_await_sig_fis_uf_substate_enter, |
| 1766 | .exit_state = scic_sds_phy_starting_await_sig_fis_uf_substate_exit |
| 1767 | }, |
| 1768 | [SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL] = { |
| 1769 | .enter_state = scic_sds_phy_starting_final_substate_enter, |
| 1770 | } |
| 1771 | }; |
| 1772 | |
| 1773 | /* |
| 1774 | * This method takes the struct scic_sds_phy from a stopped state and |
| 1775 | * attempts to start it. - The phy state machine is transitioned to the |
| 1776 | * SCI_BASE_PHY_STATE_STARTING. enum sci_status SCI_SUCCESS |
| 1777 | */ |
| 1778 | static enum sci_status |
| 1779 | scic_sds_phy_stopped_state_start_handler(struct scic_sds_phy *sci_phy) |
| 1780 | { |
| 1781 | struct isci_host *ihost; |
| 1782 | struct scic_sds_controller *scic; |
| 1783 | |
| 1784 | scic = scic_sds_phy_get_controller(sci_phy), |
| 1785 | ihost = scic_to_ihost(scic); |
| 1786 | |
| 1787 | /* Create the SIGNATURE FIS Timeout timer for this phy */ |
| 1788 | sci_phy->sata_timeout_timer = isci_timer_create(ihost, sci_phy, |
| 1789 | scic_sds_phy_sata_timeout); |
| 1790 | |
| 1791 | if (sci_phy->sata_timeout_timer) |
| 1792 | sci_base_state_machine_change_state(&sci_phy->state_machine, |
| 1793 | SCI_BASE_PHY_STATE_STARTING); |
| 1794 | |
| 1795 | return SCI_SUCCESS; |
| 1796 | } |
| 1797 | |
| 1798 | static enum sci_status |
| 1799 | scic_sds_phy_stopped_state_destroy_handler(struct scic_sds_phy *sci_phy) |
| 1800 | { |
| 1801 | return SCI_SUCCESS; |
| 1802 | } |
| 1803 | |
| 1804 | static enum sci_status |
| 1805 | scic_sds_phy_ready_state_stop_handler(struct scic_sds_phy *sci_phy) |
| 1806 | { |
| 1807 | sci_base_state_machine_change_state(&sci_phy->state_machine, |
| 1808 | SCI_BASE_PHY_STATE_STOPPED); |
| 1809 | |
| 1810 | return SCI_SUCCESS; |
| 1811 | } |
| 1812 | |
| 1813 | static enum sci_status |
| 1814 | scic_sds_phy_ready_state_reset_handler(struct scic_sds_phy *sci_phy) |
| 1815 | { |
| 1816 | sci_base_state_machine_change_state(&sci_phy->state_machine, |
| 1817 | SCI_BASE_PHY_STATE_RESETTING); |
| 1818 | |
| 1819 | return SCI_SUCCESS; |
| 1820 | } |
| 1821 | |
| 1822 | /** |
| 1823 | * scic_sds_phy_ready_state_event_handler - |
| 1824 | * @phy: This is the struct scic_sds_phy object which has received the event. |
| 1825 | * |
| 1826 | * This method request the struct scic_sds_phy handle the received event. The only |
| 1827 | * event that we are interested in while in the ready state is the link failure |
| 1828 | * event. - decoded event is a link failure - transition the struct scic_sds_phy back |
| 1829 | * to the SCI_BASE_PHY_STATE_STARTING state. - any other event received will |
| 1830 | * report a warning message enum sci_status SCI_SUCCESS if the event received is a |
| 1831 | * link failure SCI_FAILURE_INVALID_STATE for any other event received. |
| 1832 | */ |
| 1833 | static enum sci_status scic_sds_phy_ready_state_event_handler(struct scic_sds_phy *sci_phy, |
| 1834 | u32 event_code) |
| 1835 | { |
| 1836 | enum sci_status result = SCI_FAILURE; |
| 1837 | |
| 1838 | switch (scu_get_event_code(event_code)) { |
| 1839 | case SCU_EVENT_LINK_FAILURE: |
| 1840 | /* Link failure change state back to the starting state */ |
| 1841 | sci_base_state_machine_change_state(&sci_phy->state_machine, |
| 1842 | SCI_BASE_PHY_STATE_STARTING); |
| 1843 | result = SCI_SUCCESS; |
| 1844 | break; |
| 1845 | |
| 1846 | case SCU_EVENT_BROADCAST_CHANGE: |
| 1847 | /* Broadcast change received. Notify the port. */ |
| 1848 | if (scic_sds_phy_get_port(sci_phy) != NULL) |
| 1849 | scic_sds_port_broadcast_change_received(sci_phy->owning_port, sci_phy); |
| 1850 | else |
| 1851 | sci_phy->bcn_received_while_port_unassigned = true; |
| 1852 | break; |
| 1853 | |
| 1854 | default: |
| 1855 | dev_warn(sciphy_to_dev(sci_phy), |
| 1856 | "%sP SCIC PHY 0x%p ready state machine received " |
| 1857 | "unexpected event_code %x\n", |
| 1858 | __func__, sci_phy, event_code); |
| 1859 | |
| 1860 | result = SCI_FAILURE_INVALID_STATE; |
| 1861 | break; |
| 1862 | } |
| 1863 | |
| 1864 | return result; |
| 1865 | } |
| 1866 | |
| 1867 | static enum sci_status scic_sds_phy_resetting_state_event_handler(struct scic_sds_phy *sci_phy, |
| 1868 | u32 event_code) |
| 1869 | { |
| 1870 | enum sci_status result = SCI_FAILURE; |
| 1871 | |
| 1872 | switch (scu_get_event_code(event_code)) { |
| 1873 | case SCU_EVENT_HARD_RESET_TRANSMITTED: |
| 1874 | /* Link failure change state back to the starting state */ |
| 1875 | sci_base_state_machine_change_state(&sci_phy->state_machine, |
| 1876 | SCI_BASE_PHY_STATE_STARTING); |
| 1877 | result = SCI_SUCCESS; |
| 1878 | break; |
| 1879 | |
| 1880 | default: |
| 1881 | dev_warn(sciphy_to_dev(sci_phy), |
| 1882 | "%s: SCIC PHY 0x%p resetting state machine received " |
| 1883 | "unexpected event_code %x\n", |
| 1884 | __func__, sci_phy, event_code); |
| 1885 | |
| 1886 | result = SCI_FAILURE_INVALID_STATE; |
| 1887 | break; |
| 1888 | } |
| 1889 | |
| 1890 | return result; |
| 1891 | } |
| 1892 | |
| 1893 | /* --------------------------------------------------------------------------- */ |
| 1894 | |
| 1895 | static const struct scic_sds_phy_state_handler scic_sds_phy_state_handler_table[] = { |
| 1896 | [SCI_BASE_PHY_STATE_INITIAL] = { |
| 1897 | .start_handler = scic_sds_phy_default_start_handler, |
| 1898 | .stop_handler = scic_sds_phy_default_stop_handler, |
| 1899 | .reset_handler = scic_sds_phy_default_reset_handler, |
| 1900 | .destruct_handler = scic_sds_phy_default_destroy_handler, |
| 1901 | .frame_handler = scic_sds_phy_default_frame_handler, |
| 1902 | .event_handler = scic_sds_phy_default_event_handler, |
| 1903 | .consume_power_handler = scic_sds_phy_default_consume_power_handler |
| 1904 | }, |
| 1905 | [SCI_BASE_PHY_STATE_STOPPED] = { |
| 1906 | .start_handler = scic_sds_phy_stopped_state_start_handler, |
| 1907 | .stop_handler = scic_sds_phy_default_stop_handler, |
| 1908 | .reset_handler = scic_sds_phy_default_reset_handler, |
| 1909 | .destruct_handler = scic_sds_phy_stopped_state_destroy_handler, |
| 1910 | .frame_handler = scic_sds_phy_default_frame_handler, |
| 1911 | .event_handler = scic_sds_phy_default_event_handler, |
| 1912 | .consume_power_handler = scic_sds_phy_default_consume_power_handler |
| 1913 | }, |
| 1914 | [SCI_BASE_PHY_STATE_STARTING] = { |
| 1915 | .start_handler = scic_sds_phy_default_start_handler, |
| 1916 | .stop_handler = scic_sds_phy_default_stop_handler, |
| 1917 | .reset_handler = scic_sds_phy_default_reset_handler, |
| 1918 | .destruct_handler = scic_sds_phy_default_destroy_handler, |
| 1919 | .frame_handler = scic_sds_phy_default_frame_handler, |
| 1920 | .event_handler = scic_sds_phy_default_event_handler, |
| 1921 | .consume_power_handler = scic_sds_phy_default_consume_power_handler |
| 1922 | }, |
| 1923 | [SCI_BASE_PHY_STATE_READY] = { |
| 1924 | .start_handler = scic_sds_phy_default_start_handler, |
| 1925 | .stop_handler = scic_sds_phy_ready_state_stop_handler, |
| 1926 | .reset_handler = scic_sds_phy_ready_state_reset_handler, |
| 1927 | .destruct_handler = scic_sds_phy_default_destroy_handler, |
| 1928 | .frame_handler = scic_sds_phy_default_frame_handler, |
| 1929 | .event_handler = scic_sds_phy_ready_state_event_handler, |
| 1930 | .consume_power_handler = scic_sds_phy_default_consume_power_handler |
| 1931 | }, |
| 1932 | [SCI_BASE_PHY_STATE_RESETTING] = { |
| 1933 | .start_handler = scic_sds_phy_default_start_handler, |
| 1934 | .stop_handler = scic_sds_phy_default_stop_handler, |
| 1935 | .reset_handler = scic_sds_phy_default_reset_handler, |
| 1936 | .destruct_handler = scic_sds_phy_default_destroy_handler, |
| 1937 | .frame_handler = scic_sds_phy_default_frame_handler, |
| 1938 | .event_handler = scic_sds_phy_resetting_state_event_handler, |
| 1939 | .consume_power_handler = scic_sds_phy_default_consume_power_handler |
| 1940 | }, |
| 1941 | [SCI_BASE_PHY_STATE_FINAL] = { |
| 1942 | .start_handler = scic_sds_phy_default_start_handler, |
| 1943 | .stop_handler = scic_sds_phy_default_stop_handler, |
| 1944 | .reset_handler = scic_sds_phy_default_reset_handler, |
| 1945 | .destruct_handler = scic_sds_phy_default_destroy_handler, |
| 1946 | .frame_handler = scic_sds_phy_default_frame_handler, |
| 1947 | .event_handler = scic_sds_phy_default_event_handler, |
| 1948 | .consume_power_handler = scic_sds_phy_default_consume_power_handler |
| 1949 | } |
| 1950 | }; |
| 1951 | |
| 1952 | /* |
| 1953 | * **************************************************************************** |
| 1954 | * * PHY STATE PRIVATE METHODS |
| 1955 | * **************************************************************************** */ |
| 1956 | |
| 1957 | /** |
| 1958 | * |
| 1959 | * @sci_phy: This is the struct scic_sds_phy object to stop. |
| 1960 | * |
| 1961 | * This method will stop the struct scic_sds_phy object. This does not reset the |
| 1962 | * protocol engine it just suspends it and places it in a state where it will |
| 1963 | * not cause the end device to power up. none |
| 1964 | */ |
| 1965 | static void scu_link_layer_stop_protocol_engine( |
| 1966 | struct scic_sds_phy *sci_phy) |
| 1967 | { |
| 1968 | u32 scu_sas_pcfg_value; |
| 1969 | u32 enable_spinup_value; |
| 1970 | |
| 1971 | /* Suspend the protocol engine and place it in a sata spinup hold state */ |
| 1972 | scu_sas_pcfg_value = |
| 1973 | readl(&sci_phy->link_layer_registers->phy_configuration); |
| 1974 | scu_sas_pcfg_value |= |
| 1975 | (SCU_SAS_PCFG_GEN_BIT(OOB_RESET) | |
| 1976 | SCU_SAS_PCFG_GEN_BIT(SUSPEND_PROTOCOL_ENGINE) | |
| 1977 | SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD)); |
| 1978 | writel(scu_sas_pcfg_value, |
| 1979 | &sci_phy->link_layer_registers->phy_configuration); |
| 1980 | |
| 1981 | /* Disable the notify enable spinup primitives */ |
| 1982 | enable_spinup_value = readl(&sci_phy->link_layer_registers->notify_enable_spinup_control); |
| 1983 | enable_spinup_value &= ~SCU_ENSPINUP_GEN_BIT(ENABLE); |
| 1984 | writel(enable_spinup_value, &sci_phy->link_layer_registers->notify_enable_spinup_control); |
| 1985 | } |
| 1986 | |
| 1987 | /** |
| 1988 | * |
| 1989 | * |
| 1990 | * This method will start the OOB/SN state machine for this struct scic_sds_phy object. |
| 1991 | */ |
| 1992 | static void scu_link_layer_start_oob( |
| 1993 | struct scic_sds_phy *sci_phy) |
| 1994 | { |
| 1995 | u32 scu_sas_pcfg_value; |
| 1996 | |
| 1997 | scu_sas_pcfg_value = |
| 1998 | readl(&sci_phy->link_layer_registers->phy_configuration); |
| 1999 | scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE); |
| 2000 | scu_sas_pcfg_value &= |
| 2001 | ~(SCU_SAS_PCFG_GEN_BIT(OOB_RESET) | |
| 2002 | SCU_SAS_PCFG_GEN_BIT(HARD_RESET)); |
| 2003 | writel(scu_sas_pcfg_value, |
| 2004 | &sci_phy->link_layer_registers->phy_configuration); |
| 2005 | } |
| 2006 | |
| 2007 | /** |
| 2008 | * |
| 2009 | * |
| 2010 | * This method will transmit a hard reset request on the specified phy. The SCU |
| 2011 | * hardware requires that we reset the OOB state machine and set the hard reset |
| 2012 | * bit in the phy configuration register. We then must start OOB over with the |
| 2013 | * hard reset bit set. |
| 2014 | */ |
| 2015 | static void scu_link_layer_tx_hard_reset( |
| 2016 | struct scic_sds_phy *sci_phy) |
| 2017 | { |
| 2018 | u32 phy_configuration_value; |
| 2019 | |
| 2020 | /* |
| 2021 | * SAS Phys must wait for the HARD_RESET_TX event notification to transition |
| 2022 | * to the starting state. */ |
| 2023 | phy_configuration_value = |
| 2024 | readl(&sci_phy->link_layer_registers->phy_configuration); |
| 2025 | phy_configuration_value |= |
| 2026 | (SCU_SAS_PCFG_GEN_BIT(HARD_RESET) | |
| 2027 | SCU_SAS_PCFG_GEN_BIT(OOB_RESET)); |
| 2028 | writel(phy_configuration_value, |
| 2029 | &sci_phy->link_layer_registers->phy_configuration); |
| 2030 | |
| 2031 | /* Now take the OOB state machine out of reset */ |
| 2032 | phy_configuration_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE); |
| 2033 | phy_configuration_value &= ~SCU_SAS_PCFG_GEN_BIT(OOB_RESET); |
| 2034 | writel(phy_configuration_value, |
| 2035 | &sci_phy->link_layer_registers->phy_configuration); |
| 2036 | } |
| 2037 | |
| 2038 | /* |
| 2039 | * **************************************************************************** |
| 2040 | * * PHY BASE STATE METHODS |
| 2041 | * **************************************************************************** */ |
| 2042 | |
| 2043 | /** |
| 2044 | * |
| 2045 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 2046 | * |
| 2047 | * This method will perform the actions required by the struct scic_sds_phy on |
| 2048 | * entering the SCI_BASE_PHY_STATE_INITIAL. - This function sets the state |
| 2049 | * handlers for the phy object base state machine initial state. none |
| 2050 | */ |
| 2051 | static void scic_sds_phy_initial_state_enter(void *object) |
| 2052 | { |
| 2053 | struct scic_sds_phy *sci_phy = object; |
| 2054 | |
| 2055 | scic_sds_phy_set_base_state_handlers(sci_phy, SCI_BASE_PHY_STATE_INITIAL); |
| 2056 | } |
| 2057 | |
| 2058 | /** |
| 2059 | * |
| 2060 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 2061 | * |
| 2062 | * This function will perform the actions required by the struct scic_sds_phy on |
| 2063 | * entering the SCI_BASE_PHY_STATE_INITIAL. - This function sets the state |
| 2064 | * handlers for the phy object base state machine initial state. - The SCU |
| 2065 | * hardware is requested to stop the protocol engine. none |
| 2066 | */ |
| 2067 | static void scic_sds_phy_stopped_state_enter(void *object) |
| 2068 | { |
| 2069 | struct scic_sds_phy *sci_phy = object; |
| 2070 | struct scic_sds_controller *scic = scic_sds_phy_get_controller(sci_phy); |
| 2071 | struct isci_host *ihost = scic_to_ihost(scic); |
| 2072 | |
| 2073 | /* |
| 2074 | * @todo We need to get to the controller to place this PE in a |
| 2075 | * reset state |
| 2076 | */ |
| 2077 | |
| 2078 | scic_sds_phy_set_base_state_handlers(sci_phy, |
| 2079 | SCI_BASE_PHY_STATE_STOPPED); |
| 2080 | |
| 2081 | if (sci_phy->sata_timeout_timer != NULL) { |
| 2082 | isci_del_timer(ihost, sci_phy->sata_timeout_timer); |
| 2083 | |
| 2084 | sci_phy->sata_timeout_timer = NULL; |
| 2085 | } |
| 2086 | |
| 2087 | scu_link_layer_stop_protocol_engine(sci_phy); |
| 2088 | |
| 2089 | if (sci_phy->state_machine.previous_state_id != |
| 2090 | SCI_BASE_PHY_STATE_INITIAL) |
| 2091 | scic_sds_controller_link_down( |
| 2092 | scic_sds_phy_get_controller(sci_phy), |
| 2093 | scic_sds_phy_get_port(sci_phy), |
| 2094 | sci_phy); |
| 2095 | } |
| 2096 | |
| 2097 | /** |
| 2098 | * |
| 2099 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 2100 | * |
| 2101 | * This method will perform the actions required by the struct scic_sds_phy on |
| 2102 | * entering the SCI_BASE_PHY_STATE_STARTING. - This function sets the state |
| 2103 | * handlers for the phy object base state machine starting state. - The SCU |
| 2104 | * hardware is requested to start OOB/SN on this protocl engine. - The phy |
| 2105 | * starting substate machine is started. - If the previous state was the ready |
| 2106 | * state then the struct scic_sds_controller is informed that the phy has gone link |
| 2107 | * down. none |
| 2108 | */ |
| 2109 | static void scic_sds_phy_starting_state_enter(void *object) |
| 2110 | { |
| 2111 | struct scic_sds_phy *sci_phy = object; |
| 2112 | |
| 2113 | scic_sds_phy_set_base_state_handlers(sci_phy, SCI_BASE_PHY_STATE_STARTING); |
| 2114 | |
| 2115 | scu_link_layer_stop_protocol_engine(sci_phy); |
| 2116 | scu_link_layer_start_oob(sci_phy); |
| 2117 | |
| 2118 | /* We don't know what kind of phy we are going to be just yet */ |
| 2119 | sci_phy->protocol = SCIC_SDS_PHY_PROTOCOL_UNKNOWN; |
| 2120 | sci_phy->bcn_received_while_port_unassigned = false; |
| 2121 | |
| 2122 | /* Change over to the starting substate machine to continue */ |
| 2123 | sci_base_state_machine_start(&sci_phy->starting_substate_machine); |
| 2124 | |
| 2125 | if (sci_phy->state_machine.previous_state_id |
| 2126 | == SCI_BASE_PHY_STATE_READY) { |
| 2127 | scic_sds_controller_link_down( |
| 2128 | scic_sds_phy_get_controller(sci_phy), |
| 2129 | scic_sds_phy_get_port(sci_phy), |
| 2130 | sci_phy |
| 2131 | ); |
| 2132 | } |
| 2133 | } |
| 2134 | |
| 2135 | /** |
| 2136 | * |
| 2137 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 2138 | * |
| 2139 | * This method will perform the actions required by the struct scic_sds_phy on |
| 2140 | * entering the SCI_BASE_PHY_STATE_READY. - This function sets the state |
| 2141 | * handlers for the phy object base state machine ready state. - The SCU |
| 2142 | * hardware protocol engine is resumed. - The struct scic_sds_controller is informed |
| 2143 | * that the phy object has gone link up. none |
| 2144 | */ |
| 2145 | static void scic_sds_phy_ready_state_enter(void *object) |
| 2146 | { |
| 2147 | struct scic_sds_phy *sci_phy = object; |
| 2148 | |
| 2149 | scic_sds_phy_set_base_state_handlers(sci_phy, SCI_BASE_PHY_STATE_READY); |
| 2150 | |
| 2151 | scic_sds_controller_link_up( |
| 2152 | scic_sds_phy_get_controller(sci_phy), |
| 2153 | scic_sds_phy_get_port(sci_phy), |
| 2154 | sci_phy |
| 2155 | ); |
| 2156 | } |
| 2157 | |
| 2158 | /** |
| 2159 | * |
| 2160 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 2161 | * |
| 2162 | * This method will perform the actions required by the struct scic_sds_phy on exiting |
| 2163 | * the SCI_BASE_PHY_STATE_INITIAL. This function suspends the SCU hardware |
| 2164 | * protocol engine represented by this struct scic_sds_phy object. none |
| 2165 | */ |
| 2166 | static void scic_sds_phy_ready_state_exit(void *object) |
| 2167 | { |
| 2168 | struct scic_sds_phy *sci_phy = object; |
| 2169 | |
| 2170 | scic_sds_phy_suspend(sci_phy); |
| 2171 | } |
| 2172 | |
| 2173 | /** |
| 2174 | * |
| 2175 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 2176 | * |
| 2177 | * This method will perform the actions required by the struct scic_sds_phy on |
| 2178 | * entering the SCI_BASE_PHY_STATE_RESETTING. - This function sets the state |
| 2179 | * handlers for the phy object base state machine resetting state. none |
| 2180 | */ |
| 2181 | static void scic_sds_phy_resetting_state_enter(void *object) |
| 2182 | { |
| 2183 | struct scic_sds_phy *sci_phy = object; |
| 2184 | |
| 2185 | scic_sds_phy_set_base_state_handlers(sci_phy, SCI_BASE_PHY_STATE_RESETTING); |
| 2186 | |
| 2187 | /* |
| 2188 | * The phy is being reset, therefore deactivate it from the port. |
| 2189 | * In the resetting state we don't notify the user regarding |
| 2190 | * link up and link down notifications. */ |
| 2191 | scic_sds_port_deactivate_phy(sci_phy->owning_port, sci_phy, false); |
| 2192 | |
| 2193 | if (sci_phy->protocol == SCIC_SDS_PHY_PROTOCOL_SAS) { |
| 2194 | scu_link_layer_tx_hard_reset(sci_phy); |
| 2195 | } else { |
| 2196 | /* |
| 2197 | * The SCU does not need to have a discrete reset state so |
| 2198 | * just go back to the starting state. |
| 2199 | */ |
| 2200 | sci_base_state_machine_change_state( |
| 2201 | &sci_phy->state_machine, |
| 2202 | SCI_BASE_PHY_STATE_STARTING); |
| 2203 | } |
| 2204 | } |
| 2205 | |
| 2206 | /** |
| 2207 | * |
| 2208 | * @object: This is the object which is cast to a struct scic_sds_phy object. |
| 2209 | * |
| 2210 | * This method will perform the actions required by the struct scic_sds_phy on |
| 2211 | * entering the SCI_BASE_PHY_STATE_FINAL. - This function sets the state |
| 2212 | * handlers for the phy object base state machine final state. none |
| 2213 | */ |
| 2214 | static void scic_sds_phy_final_state_enter(void *object) |
| 2215 | { |
| 2216 | struct scic_sds_phy *sci_phy = object; |
| 2217 | |
| 2218 | scic_sds_phy_set_base_state_handlers(sci_phy, SCI_BASE_PHY_STATE_FINAL); |
| 2219 | |
| 2220 | /* Nothing to do here */ |
| 2221 | } |
| 2222 | |
| 2223 | /* --------------------------------------------------------------------------- */ |
| 2224 | |
| 2225 | static const struct sci_base_state scic_sds_phy_state_table[] = { |
| 2226 | [SCI_BASE_PHY_STATE_INITIAL] = { |
| 2227 | .enter_state = scic_sds_phy_initial_state_enter, |
| 2228 | }, |
| 2229 | [SCI_BASE_PHY_STATE_STOPPED] = { |
| 2230 | .enter_state = scic_sds_phy_stopped_state_enter, |
| 2231 | }, |
| 2232 | [SCI_BASE_PHY_STATE_STARTING] = { |
| 2233 | .enter_state = scic_sds_phy_starting_state_enter, |
| 2234 | }, |
| 2235 | [SCI_BASE_PHY_STATE_READY] = { |
| 2236 | .enter_state = scic_sds_phy_ready_state_enter, |
| 2237 | .exit_state = scic_sds_phy_ready_state_exit, |
| 2238 | }, |
| 2239 | [SCI_BASE_PHY_STATE_RESETTING] = { |
| 2240 | .enter_state = scic_sds_phy_resetting_state_enter, |
| 2241 | }, |
| 2242 | [SCI_BASE_PHY_STATE_FINAL] = { |
| 2243 | .enter_state = scic_sds_phy_final_state_enter, |
| 2244 | }, |
| 2245 | }; |
| 2246 | |
| 2247 | void scic_sds_phy_construct(struct scic_sds_phy *sci_phy, |
| 2248 | struct scic_sds_port *owning_port, u8 phy_index) |
| 2249 | { |
| 2250 | sci_base_state_machine_construct(&sci_phy->state_machine, |
| 2251 | sci_phy, |
| 2252 | scic_sds_phy_state_table, |
| 2253 | SCI_BASE_PHY_STATE_INITIAL); |
| 2254 | |
| 2255 | sci_base_state_machine_start(&sci_phy->state_machine); |
| 2256 | |
| 2257 | /* Copy the rest of the input data to our locals */ |
| 2258 | sci_phy->owning_port = owning_port; |
| 2259 | sci_phy->phy_index = phy_index; |
| 2260 | sci_phy->bcn_received_while_port_unassigned = false; |
| 2261 | sci_phy->protocol = SCIC_SDS_PHY_PROTOCOL_UNKNOWN; |
| 2262 | sci_phy->link_layer_registers = NULL; |
| 2263 | sci_phy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN; |
| 2264 | sci_phy->sata_timeout_timer = NULL; |
| 2265 | |
| 2266 | /* Initialize the the substate machines */ |
| 2267 | sci_base_state_machine_construct(&sci_phy->starting_substate_machine, |
| 2268 | sci_phy, |
| 2269 | scic_sds_phy_starting_substates, |
| 2270 | SCIC_SDS_PHY_STARTING_SUBSTATE_INITIAL); |
| 2271 | } |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 2272 | |
Dan Williams | 4b33981 | 2011-05-06 17:36:38 -0700 | [diff] [blame] | 2273 | void isci_phy_init(struct isci_phy *iphy, struct isci_host *ihost, int index) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 2274 | { |
Dan Williams | 150fc6f | 2011-02-25 10:25:21 -0800 | [diff] [blame] | 2275 | union scic_oem_parameters oem; |
Dan Williams | 4b33981 | 2011-05-06 17:36:38 -0700 | [diff] [blame] | 2276 | u64 sci_sas_addr; |
| 2277 | __be64 sas_addr; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 2278 | |
Dan Williams | 4b33981 | 2011-05-06 17:36:38 -0700 | [diff] [blame] | 2279 | scic_oem_parameters_get(&ihost->sci, &oem); |
| 2280 | sci_sas_addr = oem.sds1.phys[index].sas_address.high; |
| 2281 | sci_sas_addr <<= 32; |
| 2282 | sci_sas_addr |= oem.sds1.phys[index].sas_address.low; |
| 2283 | sas_addr = cpu_to_be64(sci_sas_addr); |
| 2284 | memcpy(iphy->sas_addr, &sas_addr, sizeof(sas_addr)); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 2285 | |
Dan Williams | 4b33981 | 2011-05-06 17:36:38 -0700 | [diff] [blame] | 2286 | iphy->isci_port = NULL; |
| 2287 | iphy->sas_phy.enabled = 0; |
| 2288 | iphy->sas_phy.id = index; |
| 2289 | iphy->sas_phy.sas_addr = &iphy->sas_addr[0]; |
| 2290 | iphy->sas_phy.frame_rcvd = (u8 *)&iphy->frame_rcvd; |
| 2291 | iphy->sas_phy.ha = &ihost->sas_ha; |
| 2292 | iphy->sas_phy.lldd_phy = iphy; |
| 2293 | iphy->sas_phy.enabled = 1; |
| 2294 | iphy->sas_phy.class = SAS; |
| 2295 | iphy->sas_phy.iproto = SAS_PROTOCOL_ALL; |
| 2296 | iphy->sas_phy.tproto = 0; |
| 2297 | iphy->sas_phy.type = PHY_TYPE_PHYSICAL; |
| 2298 | iphy->sas_phy.role = PHY_ROLE_INITIATOR; |
| 2299 | iphy->sas_phy.oob_mode = OOB_NOT_CONNECTED; |
| 2300 | iphy->sas_phy.linkrate = SAS_LINK_RATE_UNKNOWN; |
| 2301 | memset(&iphy->frame_rcvd, 0, sizeof(iphy->frame_rcvd)); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 2302 | } |
| 2303 | |
| 2304 | |
| 2305 | /** |
| 2306 | * isci_phy_control() - This function is one of the SAS Domain Template |
| 2307 | * functions. This is a phy management function. |
| 2308 | * @phy: This parameter specifies the sphy being controlled. |
| 2309 | * @func: This parameter specifies the phy control function being invoked. |
| 2310 | * @buf: This parameter is specific to the phy function being invoked. |
| 2311 | * |
| 2312 | * status, zero indicates success. |
| 2313 | */ |
Dave Jiang | 4d07f7f | 2011-03-02 12:31:24 -0800 | [diff] [blame] | 2314 | int isci_phy_control(struct asd_sas_phy *sas_phy, |
| 2315 | enum phy_func func, |
| 2316 | void *buf) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 2317 | { |
Dave Jiang | 4d07f7f | 2011-03-02 12:31:24 -0800 | [diff] [blame] | 2318 | int ret = 0; |
| 2319 | struct isci_phy *iphy = sas_phy->lldd_phy; |
| 2320 | struct isci_port *iport = iphy->isci_port; |
| 2321 | struct isci_host *ihost = sas_phy->ha->lldd_ha; |
| 2322 | unsigned long flags; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 2323 | |
Dave Jiang | 4d07f7f | 2011-03-02 12:31:24 -0800 | [diff] [blame] | 2324 | dev_dbg(&ihost->pdev->dev, |
| 2325 | "%s: phy %p; func %d; buf %p; isci phy %p, port %p\n", |
| 2326 | __func__, sas_phy, func, buf, iphy, iport); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 2327 | |
| 2328 | switch (func) { |
Dave Jiang | 4d07f7f | 2011-03-02 12:31:24 -0800 | [diff] [blame] | 2329 | case PHY_FUNC_DISABLE: |
| 2330 | spin_lock_irqsave(&ihost->scic_lock, flags); |
Dan Williams | 4b33981 | 2011-05-06 17:36:38 -0700 | [diff] [blame] | 2331 | scic_sds_phy_stop(&iphy->sci); |
Dave Jiang | 4d07f7f | 2011-03-02 12:31:24 -0800 | [diff] [blame] | 2332 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
| 2333 | break; |
| 2334 | |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 2335 | case PHY_FUNC_LINK_RESET: |
Dave Jiang | 4d07f7f | 2011-03-02 12:31:24 -0800 | [diff] [blame] | 2336 | spin_lock_irqsave(&ihost->scic_lock, flags); |
Dan Williams | 4b33981 | 2011-05-06 17:36:38 -0700 | [diff] [blame] | 2337 | scic_sds_phy_stop(&iphy->sci); |
| 2338 | scic_sds_phy_start(&iphy->sci); |
Dave Jiang | 4d07f7f | 2011-03-02 12:31:24 -0800 | [diff] [blame] | 2339 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
| 2340 | break; |
| 2341 | |
| 2342 | case PHY_FUNC_HARD_RESET: |
| 2343 | if (!iport) |
| 2344 | return -ENODEV; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 2345 | |
| 2346 | /* Perform the port reset. */ |
Dan Williams | 4393aa4 | 2011-03-31 13:10:44 -0700 | [diff] [blame] | 2347 | ret = isci_port_perform_hard_reset(ihost, iport, iphy); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 2348 | |
| 2349 | break; |
| 2350 | |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 2351 | default: |
Dave Jiang | 4d07f7f | 2011-03-02 12:31:24 -0800 | [diff] [blame] | 2352 | dev_dbg(&ihost->pdev->dev, |
| 2353 | "%s: phy %p; func %d NOT IMPLEMENTED!\n", |
| 2354 | __func__, sas_phy, func); |
| 2355 | ret = -ENOSYS; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 2356 | break; |
| 2357 | } |
| 2358 | return ret; |
| 2359 | } |