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 | |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 56 | #include "isci.h" |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 57 | #include "port.h" |
| 58 | #include "request.h" |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 59 | |
| 60 | #define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000) |
| 61 | #define SCU_DUMMY_INDEX (0xFFFF) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 62 | |
Dan Williams | e531381 | 2011-05-07 10:11:43 -0700 | [diff] [blame] | 63 | static void isci_port_change_state(struct isci_port *iport, enum isci_status status) |
| 64 | { |
| 65 | unsigned long flags; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 66 | |
Dan Williams | e531381 | 2011-05-07 10:11:43 -0700 | [diff] [blame] | 67 | dev_dbg(&iport->isci_host->pdev->dev, |
| 68 | "%s: iport = %p, state = 0x%x\n", |
| 69 | __func__, iport, status); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 70 | |
Dan Williams | e531381 | 2011-05-07 10:11:43 -0700 | [diff] [blame] | 71 | /* XXX pointless lock */ |
| 72 | spin_lock_irqsave(&iport->state_lock, flags); |
| 73 | iport->status = status; |
| 74 | spin_unlock_irqrestore(&iport->state_lock, flags); |
| 75 | } |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 76 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 77 | static void sci_port_get_protocols(struct isci_port *iport, struct sci_phy_proto *proto) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 78 | { |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 79 | u8 index; |
| 80 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 81 | proto->all = 0; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 82 | for (index = 0; index < SCI_MAX_PHYS; index++) { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 83 | struct isci_phy *iphy = iport->phy_table[index]; |
| 84 | |
| 85 | if (!iphy) |
| 86 | continue; |
| 87 | sci_phy_get_protocols(iphy, proto); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 88 | } |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 89 | } |
| 90 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 91 | static u32 sci_port_get_phys(struct isci_port *iport) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 92 | { |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 93 | u32 index; |
| 94 | u32 mask; |
| 95 | |
| 96 | mask = 0; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 97 | for (index = 0; index < SCI_MAX_PHYS; index++) |
| 98 | if (iport->phy_table[index]) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 99 | mask |= (1 << index); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 100 | |
| 101 | return mask; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 102 | } |
| 103 | |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 104 | /** |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 105 | * sci_port_get_properties() - This method simply returns the properties |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 106 | * regarding the port, such as: physical index, protocols, sas address, etc. |
| 107 | * @port: this parameter specifies the port for which to retrieve the physical |
| 108 | * index. |
| 109 | * @properties: This parameter specifies the properties structure into which to |
| 110 | * copy the requested information. |
| 111 | * |
| 112 | * Indicate if the user specified a valid port. SCI_SUCCESS This value is |
| 113 | * returned if the specified port was valid. SCI_FAILURE_INVALID_PORT This |
| 114 | * value is returned if the specified port is not valid. When this value is |
| 115 | * returned, no data is copied to the properties output parameter. |
| 116 | */ |
Bartek Nowakowski | 7e62984 | 2012-01-04 01:33:20 -0800 | [diff] [blame^] | 117 | enum sci_status sci_port_get_properties(struct isci_port *iport, |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 118 | struct sci_port_properties *prop) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 119 | { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 120 | if (!iport || iport->logical_port_index == SCIC_SDS_DUMMY_PORT) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 121 | return SCI_FAILURE_INVALID_PORT; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 122 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 123 | prop->index = iport->logical_port_index; |
| 124 | prop->phy_mask = sci_port_get_phys(iport); |
| 125 | sci_port_get_sas_address(iport, &prop->local.sas_address); |
| 126 | sci_port_get_protocols(iport, &prop->local.protocols); |
| 127 | sci_port_get_attached_sas_address(iport, &prop->remote.sas_address); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 128 | |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 129 | return SCI_SUCCESS; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 130 | } |
| 131 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 132 | static void sci_port_bcn_enable(struct isci_port *iport) |
Jeff Skirvin | 61aaff4 | 2011-06-21 12:16:33 -0700 | [diff] [blame] | 133 | { |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 134 | struct isci_phy *iphy; |
Jeff Skirvin | 61aaff4 | 2011-06-21 12:16:33 -0700 | [diff] [blame] | 135 | u32 val; |
| 136 | int i; |
| 137 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 138 | for (i = 0; i < ARRAY_SIZE(iport->phy_table); i++) { |
| 139 | iphy = iport->phy_table[i]; |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 140 | if (!iphy) |
Jeff Skirvin | 61aaff4 | 2011-06-21 12:16:33 -0700 | [diff] [blame] | 141 | continue; |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 142 | val = readl(&iphy->link_layer_registers->link_layer_control); |
Jeff Skirvin | 61aaff4 | 2011-06-21 12:16:33 -0700 | [diff] [blame] | 143 | /* clear the bit by writing 1. */ |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 144 | writel(val, &iphy->link_layer_registers->link_layer_control); |
Jeff Skirvin | 61aaff4 | 2011-06-21 12:16:33 -0700 | [diff] [blame] | 145 | } |
| 146 | } |
| 147 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 148 | static void isci_port_bc_change_received(struct isci_host *ihost, |
| 149 | struct isci_port *iport, |
| 150 | struct isci_phy *iphy) |
Jeff Skirvin | 61aaff4 | 2011-06-21 12:16:33 -0700 | [diff] [blame] | 151 | { |
Dan Williams | 52d7463 | 2011-10-27 15:05:37 -0700 | [diff] [blame] | 152 | dev_dbg(&ihost->pdev->dev, |
| 153 | "%s: isci_phy = %p, sas_phy = %p\n", |
| 154 | __func__, iphy, &iphy->sas_phy); |
Jeff Skirvin | 61aaff4 | 2011-06-21 12:16:33 -0700 | [diff] [blame] | 155 | |
Dan Williams | 52d7463 | 2011-10-27 15:05:37 -0700 | [diff] [blame] | 156 | ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD); |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 157 | sci_port_bcn_enable(iport); |
Jeff Skirvin | 61aaff4 | 2011-06-21 12:16:33 -0700 | [diff] [blame] | 158 | } |
| 159 | |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 160 | static void isci_port_link_up(struct isci_host *isci_host, |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 161 | struct isci_port *iport, |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 162 | struct isci_phy *iphy) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 163 | { |
| 164 | unsigned long flags; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 165 | struct sci_port_properties properties; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 166 | unsigned long success = true; |
| 167 | |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 168 | BUG_ON(iphy->isci_port != NULL); |
Bartosz Barcinski | 6cb4d6b | 2011-04-12 17:28:43 -0700 | [diff] [blame] | 169 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 170 | iphy->isci_port = iport; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 171 | |
| 172 | dev_dbg(&isci_host->pdev->dev, |
| 173 | "%s: isci_port = %p\n", |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 174 | __func__, iport); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 175 | |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 176 | spin_lock_irqsave(&iphy->sas_phy.frame_rcvd_lock, flags); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 177 | |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 178 | isci_port_change_state(iphy->isci_port, isci_starting); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 179 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 180 | sci_port_get_properties(iport, &properties); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 181 | |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 182 | if (iphy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) { |
Dan Williams | 150fc6f | 2011-02-25 10:25:21 -0800 | [diff] [blame] | 183 | u64 attached_sas_address; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 184 | |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 185 | iphy->sas_phy.oob_mode = SATA_OOB_MODE; |
| 186 | iphy->sas_phy.frame_rcvd_size = sizeof(struct dev_to_host_fis); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 187 | |
| 188 | /* |
| 189 | * For direct-attached SATA devices, the SCI core will |
| 190 | * automagically assign a SAS address to the end device |
| 191 | * for the purpose of creating a port. This SAS address |
| 192 | * will not be the same as assigned to the PHY and needs |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 193 | * to be obtained from struct sci_port_properties properties. |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 194 | */ |
Dan Williams | 150fc6f | 2011-02-25 10:25:21 -0800 | [diff] [blame] | 195 | attached_sas_address = properties.remote.sas_address.high; |
| 196 | attached_sas_address <<= 32; |
| 197 | attached_sas_address |= properties.remote.sas_address.low; |
| 198 | swab64s(&attached_sas_address); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 199 | |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 200 | memcpy(&iphy->sas_phy.attached_sas_addr, |
Dan Williams | 150fc6f | 2011-02-25 10:25:21 -0800 | [diff] [blame] | 201 | &attached_sas_address, sizeof(attached_sas_address)); |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 202 | } else if (iphy->protocol == SCIC_SDS_PHY_PROTOCOL_SAS) { |
| 203 | iphy->sas_phy.oob_mode = SAS_OOB_MODE; |
| 204 | iphy->sas_phy.frame_rcvd_size = sizeof(struct sas_identify_frame); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 205 | |
| 206 | /* Copy the attached SAS address from the IAF */ |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 207 | memcpy(iphy->sas_phy.attached_sas_addr, |
| 208 | iphy->frame_rcvd.iaf.sas_addr, SAS_ADDR_SIZE); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 209 | } else { |
| 210 | dev_err(&isci_host->pdev->dev, "%s: unkown target\n", __func__); |
| 211 | success = false; |
| 212 | } |
| 213 | |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 214 | iphy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(iphy); |
Dan Williams | 83e5143 | 2011-02-18 09:25:13 -0800 | [diff] [blame] | 215 | |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 216 | spin_unlock_irqrestore(&iphy->sas_phy.frame_rcvd_lock, flags); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 217 | |
| 218 | /* Notify libsas that we have an address frame, if indeed |
| 219 | * we've found an SSP, SMP, or STP target */ |
| 220 | if (success) |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 221 | isci_host->sas_ha.notify_port_event(&iphy->sas_phy, |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 222 | PORTE_BYTES_DMAED); |
| 223 | } |
| 224 | |
| 225 | |
| 226 | /** |
| 227 | * isci_port_link_down() - This function is called by the sci core when a link |
| 228 | * becomes inactive. |
| 229 | * @isci_host: This parameter specifies the isci host object. |
| 230 | * @phy: This parameter specifies the isci phy with the active link. |
| 231 | * @port: This parameter specifies the isci port with the active link. |
| 232 | * |
| 233 | */ |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 234 | static void isci_port_link_down(struct isci_host *isci_host, |
| 235 | struct isci_phy *isci_phy, |
| 236 | struct isci_port *isci_port) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 237 | { |
| 238 | struct isci_remote_device *isci_device; |
| 239 | |
| 240 | dev_dbg(&isci_host->pdev->dev, |
| 241 | "%s: isci_port = %p\n", __func__, isci_port); |
| 242 | |
| 243 | if (isci_port) { |
| 244 | |
| 245 | /* check to see if this is the last phy on this port. */ |
Jeff Skirvin | 61aaff4 | 2011-06-21 12:16:33 -0700 | [diff] [blame] | 246 | if (isci_phy->sas_phy.port && |
| 247 | isci_phy->sas_phy.port->num_phys == 1) { |
Jeff Skirvin | 61aaff4 | 2011-06-21 12:16:33 -0700 | [diff] [blame] | 248 | /* change the state for all devices on this port. The |
| 249 | * next task sent to this device will be returned as |
| 250 | * SAS_TASK_UNDELIVERED, and the scsi mid layer will |
| 251 | * remove the target |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 252 | */ |
| 253 | list_for_each_entry(isci_device, |
| 254 | &isci_port->remote_dev_list, |
| 255 | node) { |
| 256 | dev_dbg(&isci_host->pdev->dev, |
| 257 | "%s: isci_device = %p\n", |
| 258 | __func__, isci_device); |
Dan Williams | 209fae1 | 2011-06-13 17:39:44 -0700 | [diff] [blame] | 259 | set_bit(IDEV_GONE, &isci_device->flags); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 260 | } |
Jeff Skirvin | cdd05f0 | 2011-09-28 18:47:56 -0700 | [diff] [blame] | 261 | isci_port_change_state(isci_port, isci_stopping); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 262 | } |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 263 | } |
| 264 | |
| 265 | /* Notify libsas of the borken link, this will trigger calls to our |
| 266 | * isci_port_deformed and isci_dev_gone functions. |
| 267 | */ |
| 268 | sas_phy_disconnected(&isci_phy->sas_phy); |
| 269 | isci_host->sas_ha.notify_phy_event(&isci_phy->sas_phy, |
| 270 | PHYE_LOSS_OF_SIGNAL); |
| 271 | |
| 272 | isci_phy->isci_port = NULL; |
| 273 | |
| 274 | dev_dbg(&isci_host->pdev->dev, |
| 275 | "%s: isci_port = %p - Done\n", __func__, isci_port); |
| 276 | } |
| 277 | |
| 278 | |
| 279 | /** |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 280 | * isci_port_ready() - This function is called by the sci core when a link |
| 281 | * becomes ready. |
| 282 | * @isci_host: This parameter specifies the isci host object. |
| 283 | * @port: This parameter specifies the sci port with the active link. |
| 284 | * |
| 285 | */ |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 286 | static void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 287 | { |
| 288 | dev_dbg(&isci_host->pdev->dev, |
| 289 | "%s: isci_port = %p\n", __func__, isci_port); |
| 290 | |
| 291 | complete_all(&isci_port->start_complete); |
| 292 | isci_port_change_state(isci_port, isci_ready); |
| 293 | return; |
| 294 | } |
| 295 | |
| 296 | /** |
| 297 | * isci_port_not_ready() - This function is called by the sci core when a link |
| 298 | * is not ready. All remote devices on this link will be removed if they are |
| 299 | * in the stopping state. |
| 300 | * @isci_host: This parameter specifies the isci host object. |
| 301 | * @port: This parameter specifies the sci port with the active link. |
| 302 | * |
| 303 | */ |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 304 | static void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 305 | { |
| 306 | dev_dbg(&isci_host->pdev->dev, |
| 307 | "%s: isci_port = %p\n", __func__, isci_port); |
| 308 | } |
| 309 | |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 310 | static void isci_port_stop_complete(struct isci_host *ihost, |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 311 | struct isci_port *iport, |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 312 | enum sci_status completion_status) |
| 313 | { |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 314 | dev_dbg(&ihost->pdev->dev, "Port stop complete\n"); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 315 | } |
| 316 | |
Jeff Skirvin | 8e35a13 | 2011-10-27 15:05:32 -0700 | [diff] [blame] | 317 | |
| 318 | static bool is_port_ready_state(enum sci_port_states state) |
| 319 | { |
| 320 | switch (state) { |
| 321 | case SCI_PORT_READY: |
| 322 | case SCI_PORT_SUB_WAITING: |
| 323 | case SCI_PORT_SUB_OPERATIONAL: |
| 324 | case SCI_PORT_SUB_CONFIGURING: |
| 325 | return true; |
| 326 | default: |
| 327 | return false; |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | /* flag dummy rnc hanling when exiting a ready state */ |
| 332 | static void port_state_machine_change(struct isci_port *iport, |
| 333 | enum sci_port_states state) |
| 334 | { |
| 335 | struct sci_base_state_machine *sm = &iport->sm; |
| 336 | enum sci_port_states old_state = sm->current_state_id; |
| 337 | |
| 338 | if (is_port_ready_state(old_state) && !is_port_ready_state(state)) |
| 339 | iport->ready_exit = true; |
| 340 | |
| 341 | sci_change_state(sm, state); |
| 342 | iport->ready_exit = false; |
| 343 | } |
| 344 | |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 345 | /** |
| 346 | * isci_port_hard_reset_complete() - This function is called by the sci core |
| 347 | * when the hard reset complete notification has been received. |
| 348 | * @port: This parameter specifies the sci port with the active link. |
| 349 | * @completion_status: This parameter specifies the core status for the reset |
| 350 | * process. |
| 351 | * |
| 352 | */ |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 353 | static void isci_port_hard_reset_complete(struct isci_port *isci_port, |
| 354 | enum sci_status completion_status) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 355 | { |
| 356 | dev_dbg(&isci_port->isci_host->pdev->dev, |
| 357 | "%s: isci_port = %p, completion_status=%x\n", |
| 358 | __func__, isci_port, completion_status); |
| 359 | |
| 360 | /* Save the status of the hard reset from the port. */ |
| 361 | isci_port->hard_reset_status = completion_status; |
| 362 | |
Jeff Skirvin | 8e35a13 | 2011-10-27 15:05:32 -0700 | [diff] [blame] | 363 | if (completion_status != SCI_SUCCESS) { |
| 364 | |
| 365 | /* The reset failed. The port state is now SCI_PORT_FAILED. */ |
| 366 | if (isci_port->active_phy_mask == 0) { |
| 367 | |
| 368 | /* Generate the link down now to the host, since it |
| 369 | * was intercepted by the hard reset state machine when |
| 370 | * it really happened. |
| 371 | */ |
| 372 | isci_port_link_down(isci_port->isci_host, |
| 373 | &isci_port->isci_host->phys[ |
| 374 | isci_port->last_active_phy], |
| 375 | isci_port); |
| 376 | } |
| 377 | /* Advance the port state so that link state changes will be |
| 378 | * noticed. |
| 379 | */ |
| 380 | port_state_machine_change(isci_port, SCI_PORT_SUB_WAITING); |
| 381 | |
| 382 | } |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 383 | complete_all(&isci_port->hard_reset_complete); |
| 384 | } |
Dan Williams | 4393aa4 | 2011-03-31 13:10:44 -0700 | [diff] [blame] | 385 | |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 386 | /* This method will return a true value if the specified phy can be assigned to |
| 387 | * this port The following is a list of phys for each port that are allowed: - |
| 388 | * Port 0 - 3 2 1 0 - Port 1 - 1 - Port 2 - 3 2 - Port 3 - 3 This method |
| 389 | * doesn't preclude all configurations. It merely ensures that a phy is part |
| 390 | * of the allowable set of phy identifiers for that port. For example, one |
| 391 | * could assign phy 3 to port 0 and no other phys. Please refer to |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 392 | * sci_port_is_phy_mask_valid() for information regarding whether the |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 393 | * phy_mask for a port can be supported. bool true if this is a valid phy |
| 394 | * assignment for the port false if this is not a valid phy assignment for the |
| 395 | * port |
| 396 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 397 | bool sci_port_is_valid_phy_assignment(struct isci_port *iport, u32 phy_index) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 398 | { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 399 | struct isci_host *ihost = iport->owning_controller; |
| 400 | struct sci_user_parameters *user = &ihost->user_parameters; |
| 401 | |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 402 | /* Initialize to invalid value. */ |
| 403 | u32 existing_phy_index = SCI_MAX_PHYS; |
| 404 | u32 index; |
| 405 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 406 | if ((iport->physical_port_index == 1) && (phy_index != 1)) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 407 | return false; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 408 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 409 | if (iport->physical_port_index == 3 && phy_index != 3) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 410 | return false; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 411 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 412 | if (iport->physical_port_index == 2 && |
| 413 | (phy_index == 0 || phy_index == 1)) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 414 | return false; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 415 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 416 | for (index = 0; index < SCI_MAX_PHYS; index++) |
| 417 | if (iport->phy_table[index] && index != phy_index) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 418 | existing_phy_index = index; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 419 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 420 | /* Ensure that all of the phys in the port are capable of |
| 421 | * operating at the same maximum link rate. |
| 422 | */ |
| 423 | if (existing_phy_index < SCI_MAX_PHYS && |
| 424 | user->phys[phy_index].max_speed_generation != |
| 425 | user->phys[existing_phy_index].max_speed_generation) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 426 | return false; |
| 427 | |
| 428 | return true; |
| 429 | } |
| 430 | |
| 431 | /** |
| 432 | * |
| 433 | * @sci_port: This is the port object for which to determine if the phy mask |
| 434 | * can be supported. |
| 435 | * |
| 436 | * This method will return a true value if the port's phy mask can be supported |
| 437 | * by the SCU. The following is a list of valid PHY mask configurations for |
| 438 | * each port: - Port 0 - [[3 2] 1] 0 - Port 1 - [1] - Port 2 - [[3] 2] |
| 439 | * - Port 3 - [3] This method returns a boolean indication specifying if the |
| 440 | * phy mask can be supported. true if this is a valid phy assignment for the |
| 441 | * port false if this is not a valid phy assignment for the port |
| 442 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 443 | static bool sci_port_is_phy_mask_valid( |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 444 | struct isci_port *iport, |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 445 | u32 phy_mask) |
| 446 | { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 447 | if (iport->physical_port_index == 0) { |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 448 | if (((phy_mask & 0x0F) == 0x0F) |
| 449 | || ((phy_mask & 0x03) == 0x03) |
| 450 | || ((phy_mask & 0x01) == 0x01) |
| 451 | || (phy_mask == 0)) |
| 452 | return true; |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 453 | } else if (iport->physical_port_index == 1) { |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 454 | if (((phy_mask & 0x02) == 0x02) |
| 455 | || (phy_mask == 0)) |
| 456 | return true; |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 457 | } else if (iport->physical_port_index == 2) { |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 458 | if (((phy_mask & 0x0C) == 0x0C) |
| 459 | || ((phy_mask & 0x04) == 0x04) |
| 460 | || (phy_mask == 0)) |
| 461 | return true; |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 462 | } else if (iport->physical_port_index == 3) { |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 463 | if (((phy_mask & 0x08) == 0x08) |
| 464 | || (phy_mask == 0)) |
| 465 | return true; |
| 466 | } |
| 467 | |
| 468 | return false; |
| 469 | } |
| 470 | |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 471 | /* |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 472 | * This method retrieves a currently active (i.e. connected) phy contained in |
| 473 | * the port. Currently, the lowest order phy that is connected is returned. |
| 474 | * This method returns a pointer to a SCIS_SDS_PHY object. NULL This value is |
| 475 | * returned if there are no currently active (i.e. connected to a remote end |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 476 | * point) phys contained in the port. All other values specify a struct sci_phy |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 477 | * object that is active in the port. |
| 478 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 479 | static struct isci_phy *sci_port_get_a_connected_phy(struct isci_port *iport) |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 480 | { |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 481 | u32 index; |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 482 | struct isci_phy *iphy; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 483 | |
| 484 | for (index = 0; index < SCI_MAX_PHYS; index++) { |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 485 | /* Ensure that the phy is both part of the port and currently |
| 486 | * connected to the remote end-point. |
| 487 | */ |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 488 | iphy = iport->phy_table[index]; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 489 | if (iphy && sci_port_active_phy(iport, iphy)) |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 490 | return iphy; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 491 | } |
| 492 | |
| 493 | return NULL; |
| 494 | } |
| 495 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 496 | static enum sci_status sci_port_set_phy(struct isci_port *iport, struct isci_phy *iphy) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 497 | { |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 498 | /* Check to see if we can add this phy to a port |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 499 | * that means that the phy is not part of a port and that the port does |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 500 | * not already have a phy assinged to the phy index. |
| 501 | */ |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 502 | if (!iport->phy_table[iphy->phy_index] && |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 503 | !phy_get_non_dummy_port(iphy) && |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 504 | sci_port_is_valid_phy_assignment(iport, iphy->phy_index)) { |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 505 | /* Phy is being added in the stopped state so we are in MPC mode |
| 506 | * make logical port index = physical port index |
| 507 | */ |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 508 | iport->logical_port_index = iport->physical_port_index; |
| 509 | iport->phy_table[iphy->phy_index] = iphy; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 510 | sci_phy_set_port(iphy, iport); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 511 | |
| 512 | return SCI_SUCCESS; |
| 513 | } |
| 514 | |
| 515 | return SCI_FAILURE; |
| 516 | } |
| 517 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 518 | static enum sci_status sci_port_clear_phy(struct isci_port *iport, struct isci_phy *iphy) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 519 | { |
| 520 | /* Make sure that this phy is part of this port */ |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 521 | if (iport->phy_table[iphy->phy_index] == iphy && |
| 522 | phy_get_non_dummy_port(iphy) == iport) { |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 523 | struct isci_host *ihost = iport->owning_controller; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 524 | |
| 525 | /* Yep it is assigned to this port so remove it */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 526 | sci_phy_set_port(iphy, &ihost->ports[SCI_MAX_PORTS]); |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 527 | iport->phy_table[iphy->phy_index] = NULL; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 528 | return SCI_SUCCESS; |
| 529 | } |
| 530 | |
| 531 | return SCI_FAILURE; |
| 532 | } |
| 533 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 534 | void sci_port_get_sas_address(struct isci_port *iport, struct sci_sas_address *sas) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 535 | { |
| 536 | u32 index; |
| 537 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 538 | sas->high = 0; |
| 539 | sas->low = 0; |
| 540 | for (index = 0; index < SCI_MAX_PHYS; index++) |
| 541 | if (iport->phy_table[index]) |
| 542 | sci_phy_get_sas_address(iport->phy_table[index], sas); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 543 | } |
| 544 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 545 | void sci_port_get_attached_sas_address(struct isci_port *iport, struct sci_sas_address *sas) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 546 | { |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 547 | struct isci_phy *iphy; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 548 | |
| 549 | /* |
| 550 | * Ensure that the phy is both part of the port and currently |
| 551 | * connected to the remote end-point. |
| 552 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 553 | iphy = sci_port_get_a_connected_phy(iport); |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 554 | if (iphy) { |
| 555 | if (iphy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 556 | sci_phy_get_attached_sas_address(iphy, sas); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 557 | } else { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 558 | sci_phy_get_sas_address(iphy, sas); |
| 559 | sas->low += iphy->phy_index; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 560 | } |
| 561 | } else { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 562 | sas->high = 0; |
| 563 | sas->low = 0; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 564 | } |
| 565 | } |
| 566 | |
| 567 | /** |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 568 | * sci_port_construct_dummy_rnc() - create dummy rnc for si workaround |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 569 | * |
| 570 | * @sci_port: logical port on which we need to create the remote node context |
| 571 | * @rni: remote node index for this remote node context. |
| 572 | * |
| 573 | * This routine will construct a dummy remote node context data structure |
| 574 | * This structure will be posted to the hardware to work around a scheduler |
| 575 | * error in the hardware. |
| 576 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 577 | static void sci_port_construct_dummy_rnc(struct isci_port *iport, u16 rni) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 578 | { |
| 579 | union scu_remote_node_context *rnc; |
| 580 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 581 | rnc = &iport->owning_controller->remote_node_context_table[rni]; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 582 | |
| 583 | memset(rnc, 0, sizeof(union scu_remote_node_context)); |
| 584 | |
| 585 | rnc->ssp.remote_sas_address_hi = 0; |
| 586 | rnc->ssp.remote_sas_address_lo = 0; |
| 587 | |
| 588 | rnc->ssp.remote_node_index = rni; |
| 589 | rnc->ssp.remote_node_port_width = 1; |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 590 | rnc->ssp.logical_port_index = iport->physical_port_index; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 591 | |
| 592 | rnc->ssp.nexus_loss_timer_enable = false; |
| 593 | rnc->ssp.check_bit = false; |
| 594 | rnc->ssp.is_valid = true; |
| 595 | rnc->ssp.is_remote_node_context = true; |
| 596 | rnc->ssp.function_number = 0; |
| 597 | rnc->ssp.arbitration_wait_time = 0; |
| 598 | } |
| 599 | |
Dan Williams | dd047c8 | 2011-06-09 11:06:58 -0700 | [diff] [blame] | 600 | /* |
| 601 | * construct a dummy task context data structure. This |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 602 | * structure will be posted to the hardwre to work around a scheduler error |
| 603 | * in the hardware. |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 604 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 605 | static void sci_port_construct_dummy_task(struct isci_port *iport, u16 tag) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 606 | { |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 607 | struct isci_host *ihost = iport->owning_controller; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 608 | struct scu_task_context *task_context; |
| 609 | |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 610 | task_context = &ihost->task_context_table[ISCI_TAG_TCI(tag)]; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 611 | memset(task_context, 0, sizeof(struct scu_task_context)); |
| 612 | |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 613 | task_context->initiator_request = 1; |
| 614 | task_context->connection_rate = 1; |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 615 | task_context->logical_port_index = iport->physical_port_index; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 616 | task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP; |
Dan Williams | dd047c8 | 2011-06-09 11:06:58 -0700 | [diff] [blame] | 617 | task_context->task_index = ISCI_TAG_TCI(tag); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 618 | task_context->valid = SCU_TASK_CONTEXT_VALID; |
| 619 | task_context->context_type = SCU_TASK_CONTEXT_TYPE; |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 620 | task_context->remote_node_index = iport->reserved_rni; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 621 | task_context->do_not_dma_ssp_good_response = 1; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 622 | task_context->task_phase = 0x01; |
| 623 | } |
| 624 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 625 | static void sci_port_destroy_dummy_resources(struct isci_port *iport) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 626 | { |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 627 | struct isci_host *ihost = iport->owning_controller; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 628 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 629 | if (iport->reserved_tag != SCI_CONTROLLER_INVALID_IO_TAG) |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 630 | isci_free_tag(ihost, iport->reserved_tag); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 631 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 632 | if (iport->reserved_rni != SCU_DUMMY_INDEX) |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 633 | sci_remote_node_table_release_remote_node_index(&ihost->available_remote_nodes, |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 634 | 1, iport->reserved_rni); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 635 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 636 | iport->reserved_rni = SCU_DUMMY_INDEX; |
| 637 | iport->reserved_tag = SCI_CONTROLLER_INVALID_IO_TAG; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 638 | } |
| 639 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 640 | void sci_port_setup_transports(struct isci_port *iport, u32 device_id) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 641 | { |
| 642 | u8 index; |
| 643 | |
| 644 | for (index = 0; index < SCI_MAX_PHYS; index++) { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 645 | if (iport->active_phy_mask & (1 << index)) |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 646 | sci_phy_setup_transport(iport->phy_table[index], device_id); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 647 | } |
| 648 | } |
| 649 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 650 | static void sci_port_activate_phy(struct isci_port *iport, struct isci_phy *iphy, |
| 651 | bool do_notify_user) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 652 | { |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 653 | struct isci_host *ihost = iport->owning_controller; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 654 | |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 655 | if (iphy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 656 | sci_phy_resume(iphy); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 657 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 658 | iport->active_phy_mask |= 1 << iphy->phy_index; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 659 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 660 | sci_controller_clear_invalid_phy(ihost, iphy); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 661 | |
| 662 | if (do_notify_user == true) |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 663 | isci_port_link_up(ihost, iport, iphy); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 664 | } |
| 665 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 666 | void sci_port_deactivate_phy(struct isci_port *iport, struct isci_phy *iphy, |
| 667 | bool do_notify_user) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 668 | { |
Dan Williams | 34a9915 | 2011-07-01 02:25:15 -0700 | [diff] [blame] | 669 | struct isci_host *ihost = iport->owning_controller; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 670 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 671 | iport->active_phy_mask &= ~(1 << iphy->phy_index); |
Jeff Skirvin | 8e35a13 | 2011-10-27 15:05:32 -0700 | [diff] [blame] | 672 | if (!iport->active_phy_mask) |
| 673 | iport->last_active_phy = iphy->phy_index; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 674 | |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 675 | iphy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 676 | |
Marcin Tomczak | d4ec1cf | 2012-01-04 01:33:15 -0800 | [diff] [blame] | 677 | /* Re-assign the phy back to the LP as if it were a narrow port for APC |
| 678 | * mode. For MPC mode, the phy will remain in the port. |
| 679 | */ |
| 680 | if (iport->owning_controller->oem_parameters.controller.mode_type == |
| 681 | SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE) |
| 682 | writel(iphy->phy_index, |
| 683 | &iport->port_pe_configuration_register[iphy->phy_index]); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 684 | |
| 685 | if (do_notify_user == true) |
| 686 | isci_port_link_down(ihost, iphy, iport); |
| 687 | } |
| 688 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 689 | static void sci_port_invalid_link_up(struct isci_port *iport, struct isci_phy *iphy) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 690 | { |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 691 | struct isci_host *ihost = iport->owning_controller; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 692 | |
| 693 | /* |
| 694 | * Check to see if we have alreay reported this link as bad and if |
| 695 | * not go ahead and tell the SCI_USER that we have discovered an |
| 696 | * invalid link. |
| 697 | */ |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 698 | if ((ihost->invalid_phy_mask & (1 << iphy->phy_index)) == 0) { |
Dan Williams | 34a9915 | 2011-07-01 02:25:15 -0700 | [diff] [blame] | 699 | ihost->invalid_phy_mask |= 1 << iphy->phy_index; |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 700 | dev_warn(&ihost->pdev->dev, "Invalid link up!\n"); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 701 | } |
| 702 | } |
| 703 | |
| 704 | /** |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 705 | * sci_port_general_link_up_handler - phy can be assigned to port? |
| 706 | * @sci_port: sci_port object for which has a phy that has gone link up. |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 707 | * @sci_phy: This is the struct isci_phy object that has gone link up. |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 708 | * @do_notify_user: This parameter specifies whether to inform the user (via |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 709 | * sci_port_link_up()) as to the fact that a new phy as become ready. |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 710 | * |
| 711 | * Determine if this phy can be assigned to this |
| 712 | * port . If the phy is not a valid PHY for |
| 713 | * this port then the function will notify the user. A PHY can only be |
| 714 | * part of a port if it's attached SAS ADDRESS is the same as all other PHYs in |
| 715 | * the same port. none |
| 716 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 717 | static void sci_port_general_link_up_handler(struct isci_port *iport, |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 718 | struct isci_phy *iphy, |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 719 | bool do_notify_user) |
| 720 | { |
| 721 | struct sci_sas_address port_sas_address; |
| 722 | struct sci_sas_address phy_sas_address; |
| 723 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 724 | sci_port_get_attached_sas_address(iport, &port_sas_address); |
| 725 | sci_phy_get_attached_sas_address(iphy, &phy_sas_address); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 726 | |
| 727 | /* If the SAS address of the new phy matches the SAS address of |
| 728 | * other phys in the port OR this is the first phy in the port, |
| 729 | * then activate the phy and allow it to be used for operations |
| 730 | * in this port. |
| 731 | */ |
| 732 | if ((phy_sas_address.high == port_sas_address.high && |
| 733 | phy_sas_address.low == port_sas_address.low) || |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 734 | iport->active_phy_mask == 0) { |
| 735 | struct sci_base_state_machine *sm = &iport->sm; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 736 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 737 | sci_port_activate_phy(iport, iphy, do_notify_user); |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 738 | if (sm->current_state_id == SCI_PORT_RESETTING) |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 739 | port_state_machine_change(iport, SCI_PORT_READY); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 740 | } else |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 741 | sci_port_invalid_link_up(iport, iphy); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 742 | } |
| 743 | |
| 744 | |
| 745 | |
| 746 | /** |
| 747 | * This method returns false if the port only has a single phy object assigned. |
| 748 | * If there are no phys or more than one phy then the method will return |
| 749 | * true. |
| 750 | * @sci_port: The port for which the wide port condition is to be checked. |
| 751 | * |
| 752 | * bool true Is returned if this is a wide ported port. false Is returned if |
| 753 | * this is a narrow port. |
| 754 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 755 | static bool sci_port_is_wide(struct isci_port *iport) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 756 | { |
| 757 | u32 index; |
| 758 | u32 phy_count = 0; |
| 759 | |
| 760 | for (index = 0; index < SCI_MAX_PHYS; index++) { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 761 | if (iport->phy_table[index] != NULL) { |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 762 | phy_count++; |
| 763 | } |
| 764 | } |
| 765 | |
| 766 | return phy_count != 1; |
| 767 | } |
| 768 | |
| 769 | /** |
| 770 | * This method is called by the PHY object when the link is detected. if the |
| 771 | * port wants the PHY to continue on to the link up state then the port |
| 772 | * layer must return true. If the port object returns false the phy object |
| 773 | * must halt its attempt to go link up. |
| 774 | * @sci_port: The port associated with the phy object. |
| 775 | * @sci_phy: The phy object that is trying to go link up. |
| 776 | * |
| 777 | * true if the phy object can continue to the link up condition. true Is |
| 778 | * returned if this phy can continue to the ready state. false Is returned if |
| 779 | * can not continue on to the ready state. This notification is in place for |
| 780 | * wide ports and direct attached phys. Since there are no wide ported SATA |
| 781 | * devices this could become an invalid port configuration. |
| 782 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 783 | bool sci_port_link_detected( |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 784 | struct isci_port *iport, |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 785 | struct isci_phy *iphy) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 786 | { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 787 | if ((iport->logical_port_index != SCIC_SDS_DUMMY_PORT) && |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 788 | (iphy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) && |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 789 | sci_port_is_wide(iport)) { |
| 790 | sci_port_invalid_link_up(iport, iphy); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 791 | |
| 792 | return false; |
| 793 | } |
| 794 | |
| 795 | return true; |
| 796 | } |
| 797 | |
Edmund Nadolski | 5553ba2 | 2011-05-19 11:59:10 +0000 | [diff] [blame] | 798 | static void port_timeout(unsigned long data) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 799 | { |
Edmund Nadolski | 5553ba2 | 2011-05-19 11:59:10 +0000 | [diff] [blame] | 800 | struct sci_timer *tmr = (struct sci_timer *)data; |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 801 | struct isci_port *iport = container_of(tmr, typeof(*iport), timer); |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 802 | struct isci_host *ihost = iport->owning_controller; |
Edmund Nadolski | 5553ba2 | 2011-05-19 11:59:10 +0000 | [diff] [blame] | 803 | unsigned long flags; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 804 | u32 current_state; |
| 805 | |
Edmund Nadolski | 5553ba2 | 2011-05-19 11:59:10 +0000 | [diff] [blame] | 806 | spin_lock_irqsave(&ihost->scic_lock, flags); |
| 807 | |
| 808 | if (tmr->cancel) |
| 809 | goto done; |
| 810 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 811 | current_state = iport->sm.current_state_id; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 812 | |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 813 | if (current_state == SCI_PORT_RESETTING) { |
Piotr Sawicki | e91f41e | 2011-05-11 23:52:21 +0000 | [diff] [blame] | 814 | /* if the port is still in the resetting state then the timeout |
| 815 | * fired before the reset completed. |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 816 | */ |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 817 | port_state_machine_change(iport, SCI_PORT_FAILED); |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 818 | } else if (current_state == SCI_PORT_STOPPED) { |
Piotr Sawicki | e91f41e | 2011-05-11 23:52:21 +0000 | [diff] [blame] | 819 | /* if the port is stopped then the start request failed In this |
| 820 | * case stay in the stopped state. |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 821 | */ |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 822 | dev_err(sciport_to_dev(iport), |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 823 | "%s: SCIC Port 0x%p failed to stop before tiemout.\n", |
| 824 | __func__, |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 825 | iport); |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 826 | } else if (current_state == SCI_PORT_STOPPING) { |
Piotr Sawicki | e91f41e | 2011-05-11 23:52:21 +0000 | [diff] [blame] | 827 | /* if the port is still stopping then the stop has not completed */ |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 828 | isci_port_stop_complete(iport->owning_controller, |
| 829 | iport, |
Piotr Sawicki | e91f41e | 2011-05-11 23:52:21 +0000 | [diff] [blame] | 830 | SCI_FAILURE_TIMEOUT); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 831 | } else { |
Piotr Sawicki | e91f41e | 2011-05-11 23:52:21 +0000 | [diff] [blame] | 832 | /* The port is in the ready state and we have a timer |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 833 | * reporting a timeout this should not happen. |
| 834 | */ |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 835 | dev_err(sciport_to_dev(iport), |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 836 | "%s: SCIC Port 0x%p is processing a timeout operation " |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 837 | "in state %d.\n", __func__, iport, current_state); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 838 | } |
Edmund Nadolski | 5553ba2 | 2011-05-19 11:59:10 +0000 | [diff] [blame] | 839 | |
| 840 | done: |
| 841 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 842 | } |
| 843 | |
| 844 | /* --------------------------------------------------------------------------- */ |
| 845 | |
| 846 | /** |
| 847 | * This function updates the hardwares VIIT entry for this port. |
| 848 | * |
| 849 | * |
| 850 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 851 | static void sci_port_update_viit_entry(struct isci_port *iport) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 852 | { |
| 853 | struct sci_sas_address sas_address; |
| 854 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 855 | sci_port_get_sas_address(iport, &sas_address); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 856 | |
| 857 | writel(sas_address.high, |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 858 | &iport->viit_registers->initiator_sas_address_hi); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 859 | writel(sas_address.low, |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 860 | &iport->viit_registers->initiator_sas_address_lo); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 861 | |
| 862 | /* This value get cleared just in case its not already cleared */ |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 863 | writel(0, &iport->viit_registers->reserved); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 864 | |
| 865 | /* We are required to update the status register last */ |
| 866 | writel(SCU_VIIT_ENTRY_ID_VIIT | |
| 867 | SCU_VIIT_IPPT_INITIATOR | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 868 | ((1 << iport->physical_port_index) << SCU_VIIT_ENTRY_LPVIE_SHIFT) | |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 869 | SCU_VIIT_STATUS_ALL_VALID, |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 870 | &iport->viit_registers->status); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 871 | } |
| 872 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 873 | enum sas_linkrate sci_port_get_max_allowed_speed(struct isci_port *iport) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 874 | { |
| 875 | u16 index; |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 876 | struct isci_phy *iphy; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 877 | enum sas_linkrate max_allowed_speed = SAS_LINK_RATE_6_0_GBPS; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 878 | |
| 879 | /* |
| 880 | * Loop through all of the phys in this port and find the phy with the |
| 881 | * lowest maximum link rate. */ |
| 882 | for (index = 0; index < SCI_MAX_PHYS; index++) { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 883 | iphy = iport->phy_table[index]; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 884 | if (iphy && sci_port_active_phy(iport, iphy) && |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 885 | iphy->max_negotiated_speed < max_allowed_speed) |
| 886 | max_allowed_speed = iphy->max_negotiated_speed; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 887 | } |
| 888 | |
| 889 | return max_allowed_speed; |
| 890 | } |
| 891 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 892 | static void sci_port_suspend_port_task_scheduler(struct isci_port *iport) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 893 | { |
| 894 | u32 pts_control_value; |
| 895 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 896 | pts_control_value = readl(&iport->port_task_scheduler_registers->control); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 897 | pts_control_value |= SCU_PTSxCR_GEN_BIT(SUSPEND); |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 898 | writel(pts_control_value, &iport->port_task_scheduler_registers->control); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 899 | } |
| 900 | |
| 901 | /** |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 902 | * sci_port_post_dummy_request() - post dummy/workaround request |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 903 | * @sci_port: port to post task |
| 904 | * |
| 905 | * Prevent the hardware scheduler from posting new requests to the front |
| 906 | * of the scheduler queue causing a starvation problem for currently |
| 907 | * ongoing requests. |
| 908 | * |
| 909 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 910 | static void sci_port_post_dummy_request(struct isci_port *iport) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 911 | { |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 912 | struct isci_host *ihost = iport->owning_controller; |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 913 | u16 tag = iport->reserved_tag; |
Dan Williams | 312e0c2 | 2011-06-28 13:47:09 -0700 | [diff] [blame] | 914 | struct scu_task_context *tc; |
| 915 | u32 command; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 916 | |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 917 | tc = &ihost->task_context_table[ISCI_TAG_TCI(tag)]; |
Dan Williams | 312e0c2 | 2011-06-28 13:47:09 -0700 | [diff] [blame] | 918 | tc->abort = 0; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 919 | |
| 920 | command = SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 921 | iport->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | |
Dan Williams | 312e0c2 | 2011-06-28 13:47:09 -0700 | [diff] [blame] | 922 | ISCI_TAG_TCI(tag); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 923 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 924 | sci_controller_post_request(ihost, command); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 925 | } |
| 926 | |
| 927 | /** |
| 928 | * This routine will abort the dummy request. This will alow the hardware to |
| 929 | * power down parts of the silicon to save power. |
| 930 | * |
| 931 | * @sci_port: The port on which the task must be aborted. |
| 932 | * |
| 933 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 934 | static void sci_port_abort_dummy_request(struct isci_port *iport) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 935 | { |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 936 | struct isci_host *ihost = iport->owning_controller; |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 937 | u16 tag = iport->reserved_tag; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 938 | struct scu_task_context *tc; |
| 939 | u32 command; |
| 940 | |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 941 | tc = &ihost->task_context_table[ISCI_TAG_TCI(tag)]; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 942 | tc->abort = 1; |
| 943 | |
| 944 | command = SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 945 | iport->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | |
Dan Williams | 312e0c2 | 2011-06-28 13:47:09 -0700 | [diff] [blame] | 946 | ISCI_TAG_TCI(tag); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 947 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 948 | sci_controller_post_request(ihost, command); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 949 | } |
| 950 | |
| 951 | /** |
| 952 | * |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 953 | * @sci_port: This is the struct isci_port object to resume. |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 954 | * |
| 955 | * This method will resume the port task scheduler for this port object. none |
| 956 | */ |
| 957 | static void |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 958 | sci_port_resume_port_task_scheduler(struct isci_port *iport) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 959 | { |
| 960 | u32 pts_control_value; |
| 961 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 962 | pts_control_value = readl(&iport->port_task_scheduler_registers->control); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 963 | pts_control_value &= ~SCU_PTSxCR_GEN_BIT(SUSPEND); |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 964 | writel(pts_control_value, &iport->port_task_scheduler_registers->control); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 965 | } |
| 966 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 967 | static void sci_port_ready_substate_waiting_enter(struct sci_base_state_machine *sm) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 968 | { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 969 | struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 970 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 971 | sci_port_suspend_port_task_scheduler(iport); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 972 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 973 | iport->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 974 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 975 | if (iport->active_phy_mask != 0) { |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 976 | /* At least one of the phys on the port is ready */ |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 977 | port_state_machine_change(iport, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 978 | SCI_PORT_SUB_OPERATIONAL); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 979 | } |
| 980 | } |
| 981 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 982 | static void sci_port_ready_substate_operational_enter(struct sci_base_state_machine *sm) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 983 | { |
| 984 | u32 index; |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 985 | struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 986 | struct isci_host *ihost = iport->owning_controller; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 987 | |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 988 | isci_port_ready(ihost, iport); |
| 989 | |
| 990 | for (index = 0; index < SCI_MAX_PHYS; index++) { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 991 | if (iport->phy_table[index]) { |
| 992 | writel(iport->physical_port_index, |
| 993 | &iport->port_pe_configuration_register[ |
| 994 | iport->phy_table[index]->phy_index]); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 995 | } |
| 996 | } |
| 997 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 998 | sci_port_update_viit_entry(iport); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 999 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1000 | sci_port_resume_port_task_scheduler(iport); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1001 | |
| 1002 | /* |
| 1003 | * Post the dummy task for the port so the hardware can schedule |
| 1004 | * io correctly |
| 1005 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1006 | sci_port_post_dummy_request(iport); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1007 | } |
| 1008 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1009 | static void sci_port_invalidate_dummy_remote_node(struct isci_port *iport) |
Piotr Sawicki | e91f41e | 2011-05-11 23:52:21 +0000 | [diff] [blame] | 1010 | { |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1011 | struct isci_host *ihost = iport->owning_controller; |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1012 | u8 phys_index = iport->physical_port_index; |
Piotr Sawicki | e91f41e | 2011-05-11 23:52:21 +0000 | [diff] [blame] | 1013 | union scu_remote_node_context *rnc; |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1014 | u16 rni = iport->reserved_rni; |
Piotr Sawicki | e91f41e | 2011-05-11 23:52:21 +0000 | [diff] [blame] | 1015 | u32 command; |
| 1016 | |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1017 | rnc = &ihost->remote_node_context_table[rni]; |
Piotr Sawicki | e91f41e | 2011-05-11 23:52:21 +0000 | [diff] [blame] | 1018 | |
| 1019 | rnc->ssp.is_valid = false; |
| 1020 | |
| 1021 | /* ensure the preceding tc abort request has reached the |
| 1022 | * controller and give it ample time to act before posting the rnc |
| 1023 | * invalidate |
| 1024 | */ |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1025 | readl(&ihost->smu_registers->interrupt_status); /* flush */ |
Piotr Sawicki | e91f41e | 2011-05-11 23:52:21 +0000 | [diff] [blame] | 1026 | udelay(10); |
| 1027 | |
| 1028 | command = SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE | |
| 1029 | phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; |
| 1030 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1031 | sci_controller_post_request(ihost, command); |
Piotr Sawicki | e91f41e | 2011-05-11 23:52:21 +0000 | [diff] [blame] | 1032 | } |
| 1033 | |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1034 | /** |
| 1035 | * |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1036 | * @object: This is the object which is cast to a struct isci_port object. |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1037 | * |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1038 | * This method will perform the actions required by the struct isci_port on |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1039 | * exiting the SCI_PORT_SUB_OPERATIONAL. This function reports |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1040 | * the port not ready and suspends the port task scheduler. none |
| 1041 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1042 | static void sci_port_ready_substate_operational_exit(struct sci_base_state_machine *sm) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1043 | { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1044 | struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1045 | struct isci_host *ihost = iport->owning_controller; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1046 | |
| 1047 | /* |
| 1048 | * Kill the dummy task for this port if it has not yet posted |
| 1049 | * the hardware will treat this as a NOP and just return abort |
| 1050 | * complete. |
| 1051 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1052 | sci_port_abort_dummy_request(iport); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1053 | |
| 1054 | isci_port_not_ready(ihost, iport); |
Piotr Sawicki | e91f41e | 2011-05-11 23:52:21 +0000 | [diff] [blame] | 1055 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1056 | if (iport->ready_exit) |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1057 | sci_port_invalidate_dummy_remote_node(iport); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1058 | } |
| 1059 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1060 | static void sci_port_ready_substate_configuring_enter(struct sci_base_state_machine *sm) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1061 | { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1062 | struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1063 | struct isci_host *ihost = iport->owning_controller; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1064 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1065 | if (iport->active_phy_mask == 0) { |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1066 | isci_port_not_ready(ihost, iport); |
| 1067 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1068 | port_state_machine_change(iport, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1069 | SCI_PORT_SUB_WAITING); |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1070 | } else if (iport->started_request_count == 0) |
| 1071 | port_state_machine_change(iport, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1072 | SCI_PORT_SUB_OPERATIONAL); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1073 | } |
| 1074 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1075 | static void sci_port_ready_substate_configuring_exit(struct sci_base_state_machine *sm) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1076 | { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1077 | struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1078 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1079 | sci_port_suspend_port_task_scheduler(iport); |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1080 | if (iport->ready_exit) |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1081 | sci_port_invalidate_dummy_remote_node(iport); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1082 | } |
| 1083 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1084 | enum sci_status sci_port_start(struct isci_port *iport) |
Piotr Sawicki | d76f71d | 2011-05-11 23:52:26 +0000 | [diff] [blame] | 1085 | { |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1086 | struct isci_host *ihost = iport->owning_controller; |
Piotr Sawicki | d76f71d | 2011-05-11 23:52:26 +0000 | [diff] [blame] | 1087 | enum sci_status status = SCI_SUCCESS; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1088 | enum sci_port_states state; |
Piotr Sawicki | d76f71d | 2011-05-11 23:52:26 +0000 | [diff] [blame] | 1089 | u32 phy_mask; |
| 1090 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1091 | state = iport->sm.current_state_id; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1092 | if (state != SCI_PORT_STOPPED) { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1093 | dev_warn(sciport_to_dev(iport), |
Piotr Sawicki | d76f71d | 2011-05-11 23:52:26 +0000 | [diff] [blame] | 1094 | "%s: in wrong state: %d\n", __func__, state); |
| 1095 | return SCI_FAILURE_INVALID_STATE; |
| 1096 | } |
| 1097 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1098 | if (iport->assigned_device_count > 0) { |
Piotr Sawicki | d76f71d | 2011-05-11 23:52:26 +0000 | [diff] [blame] | 1099 | /* TODO This is a start failure operation because |
| 1100 | * there are still devices assigned to this port. |
| 1101 | * There must be no devices assigned to a port on a |
| 1102 | * start operation. |
| 1103 | */ |
| 1104 | return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; |
| 1105 | } |
| 1106 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1107 | if (iport->reserved_rni == SCU_DUMMY_INDEX) { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1108 | u16 rni = sci_remote_node_table_allocate_remote_node( |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1109 | &ihost->available_remote_nodes, 1); |
Piotr Sawicki | d76f71d | 2011-05-11 23:52:26 +0000 | [diff] [blame] | 1110 | |
| 1111 | if (rni != SCU_DUMMY_INDEX) |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1112 | sci_port_construct_dummy_rnc(iport, rni); |
Piotr Sawicki | d76f71d | 2011-05-11 23:52:26 +0000 | [diff] [blame] | 1113 | else |
| 1114 | status = SCI_FAILURE_INSUFFICIENT_RESOURCES; |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1115 | iport->reserved_rni = rni; |
Piotr Sawicki | d76f71d | 2011-05-11 23:52:26 +0000 | [diff] [blame] | 1116 | } |
| 1117 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1118 | if (iport->reserved_tag == SCI_CONTROLLER_INVALID_IO_TAG) { |
Dan Williams | 312e0c2 | 2011-06-28 13:47:09 -0700 | [diff] [blame] | 1119 | u16 tag; |
Piotr Sawicki | d76f71d | 2011-05-11 23:52:26 +0000 | [diff] [blame] | 1120 | |
Dan Williams | 312e0c2 | 2011-06-28 13:47:09 -0700 | [diff] [blame] | 1121 | tag = isci_alloc_tag(ihost); |
| 1122 | if (tag == SCI_CONTROLLER_INVALID_IO_TAG) |
Piotr Sawicki | d76f71d | 2011-05-11 23:52:26 +0000 | [diff] [blame] | 1123 | status = SCI_FAILURE_INSUFFICIENT_RESOURCES; |
Dan Williams | 312e0c2 | 2011-06-28 13:47:09 -0700 | [diff] [blame] | 1124 | else |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1125 | sci_port_construct_dummy_task(iport, tag); |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1126 | iport->reserved_tag = tag; |
Piotr Sawicki | d76f71d | 2011-05-11 23:52:26 +0000 | [diff] [blame] | 1127 | } |
| 1128 | |
| 1129 | if (status == SCI_SUCCESS) { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1130 | phy_mask = sci_port_get_phys(iport); |
Piotr Sawicki | d76f71d | 2011-05-11 23:52:26 +0000 | [diff] [blame] | 1131 | |
| 1132 | /* |
| 1133 | * There are one or more phys assigned to this port. Make sure |
| 1134 | * the port's phy mask is in fact legal and supported by the |
| 1135 | * silicon. |
| 1136 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1137 | if (sci_port_is_phy_mask_valid(iport, phy_mask) == true) { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1138 | port_state_machine_change(iport, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1139 | SCI_PORT_READY); |
Piotr Sawicki | d76f71d | 2011-05-11 23:52:26 +0000 | [diff] [blame] | 1140 | |
| 1141 | return SCI_SUCCESS; |
| 1142 | } |
| 1143 | status = SCI_FAILURE; |
| 1144 | } |
| 1145 | |
| 1146 | if (status != SCI_SUCCESS) |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1147 | sci_port_destroy_dummy_resources(iport); |
Piotr Sawicki | d76f71d | 2011-05-11 23:52:26 +0000 | [diff] [blame] | 1148 | |
| 1149 | return status; |
| 1150 | } |
| 1151 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1152 | enum sci_status sci_port_stop(struct isci_port *iport) |
Piotr Sawicki | 8bc80d3 | 2011-05-11 23:52:31 +0000 | [diff] [blame] | 1153 | { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1154 | enum sci_port_states state; |
Piotr Sawicki | 8bc80d3 | 2011-05-11 23:52:31 +0000 | [diff] [blame] | 1155 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1156 | state = iport->sm.current_state_id; |
Piotr Sawicki | 8bc80d3 | 2011-05-11 23:52:31 +0000 | [diff] [blame] | 1157 | switch (state) { |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1158 | case SCI_PORT_STOPPED: |
Piotr Sawicki | 8bc80d3 | 2011-05-11 23:52:31 +0000 | [diff] [blame] | 1159 | return SCI_SUCCESS; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1160 | case SCI_PORT_SUB_WAITING: |
| 1161 | case SCI_PORT_SUB_OPERATIONAL: |
| 1162 | case SCI_PORT_SUB_CONFIGURING: |
| 1163 | case SCI_PORT_RESETTING: |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1164 | port_state_machine_change(iport, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1165 | SCI_PORT_STOPPING); |
Piotr Sawicki | 8bc80d3 | 2011-05-11 23:52:31 +0000 | [diff] [blame] | 1166 | return SCI_SUCCESS; |
| 1167 | default: |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1168 | dev_warn(sciport_to_dev(iport), |
Piotr Sawicki | 8bc80d3 | 2011-05-11 23:52:31 +0000 | [diff] [blame] | 1169 | "%s: in wrong state: %d\n", __func__, state); |
| 1170 | return SCI_FAILURE_INVALID_STATE; |
| 1171 | } |
| 1172 | } |
| 1173 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1174 | static enum sci_status sci_port_hard_reset(struct isci_port *iport, u32 timeout) |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1175 | { |
| 1176 | enum sci_status status = SCI_FAILURE_INVALID_PHY; |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 1177 | struct isci_phy *iphy = NULL; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1178 | enum sci_port_states state; |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1179 | u32 phy_index; |
| 1180 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1181 | state = iport->sm.current_state_id; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1182 | if (state != SCI_PORT_SUB_OPERATIONAL) { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1183 | dev_warn(sciport_to_dev(iport), |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1184 | "%s: in wrong state: %d\n", __func__, state); |
| 1185 | return SCI_FAILURE_INVALID_STATE; |
| 1186 | } |
| 1187 | |
| 1188 | /* Select a phy on which we can send the hard reset request. */ |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 1189 | for (phy_index = 0; phy_index < SCI_MAX_PHYS && !iphy; phy_index++) { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1190 | iphy = iport->phy_table[phy_index]; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1191 | if (iphy && !sci_port_active_phy(iport, iphy)) { |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1192 | /* |
| 1193 | * We found a phy but it is not ready select |
| 1194 | * different phy |
| 1195 | */ |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 1196 | iphy = NULL; |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1197 | } |
| 1198 | } |
| 1199 | |
| 1200 | /* If we have a phy then go ahead and start the reset procedure */ |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 1201 | if (!iphy) |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1202 | return status; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1203 | status = sci_phy_reset(iphy); |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1204 | |
| 1205 | if (status != SCI_SUCCESS) |
| 1206 | return status; |
| 1207 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1208 | sci_mod_timer(&iport->timer, timeout); |
| 1209 | iport->not_ready_reason = SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED; |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1210 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1211 | port_state_machine_change(iport, SCI_PORT_RESETTING); |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1212 | return SCI_SUCCESS; |
| 1213 | } |
| 1214 | |
| 1215 | /** |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1216 | * sci_port_add_phy() - |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1217 | * @sci_port: This parameter specifies the port in which the phy will be added. |
| 1218 | * @sci_phy: This parameter is the phy which is to be added to the port. |
| 1219 | * |
| 1220 | * This method will add a PHY to the selected port. This method returns an |
| 1221 | * enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other |
| 1222 | * status is a failure to add the phy to the port. |
| 1223 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1224 | enum sci_status sci_port_add_phy(struct isci_port *iport, |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 1225 | struct isci_phy *iphy) |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1226 | { |
| 1227 | enum sci_status status; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1228 | enum sci_port_states state; |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1229 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1230 | state = iport->sm.current_state_id; |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1231 | switch (state) { |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1232 | case SCI_PORT_STOPPED: { |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1233 | struct sci_sas_address port_sas_address; |
| 1234 | |
| 1235 | /* Read the port assigned SAS Address if there is one */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1236 | sci_port_get_sas_address(iport, &port_sas_address); |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1237 | |
| 1238 | if (port_sas_address.high != 0 && port_sas_address.low != 0) { |
| 1239 | struct sci_sas_address phy_sas_address; |
| 1240 | |
| 1241 | /* Make sure that the PHY SAS Address matches the SAS Address |
| 1242 | * for this port |
| 1243 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1244 | sci_phy_get_sas_address(iphy, &phy_sas_address); |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1245 | |
| 1246 | if (port_sas_address.high != phy_sas_address.high || |
| 1247 | port_sas_address.low != phy_sas_address.low) |
| 1248 | return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; |
| 1249 | } |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1250 | return sci_port_set_phy(iport, iphy); |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1251 | } |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1252 | case SCI_PORT_SUB_WAITING: |
| 1253 | case SCI_PORT_SUB_OPERATIONAL: |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1254 | status = sci_port_set_phy(iport, iphy); |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1255 | |
| 1256 | if (status != SCI_SUCCESS) |
| 1257 | return status; |
| 1258 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1259 | sci_port_general_link_up_handler(iport, iphy, true); |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1260 | iport->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; |
| 1261 | port_state_machine_change(iport, SCI_PORT_SUB_CONFIGURING); |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1262 | |
| 1263 | return status; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1264 | case SCI_PORT_SUB_CONFIGURING: |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1265 | status = sci_port_set_phy(iport, iphy); |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1266 | |
| 1267 | if (status != SCI_SUCCESS) |
| 1268 | return status; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1269 | sci_port_general_link_up_handler(iport, iphy, true); |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1270 | |
| 1271 | /* Re-enter the configuring state since this may be the last phy in |
| 1272 | * the port. |
| 1273 | */ |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1274 | port_state_machine_change(iport, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1275 | SCI_PORT_SUB_CONFIGURING); |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1276 | return SCI_SUCCESS; |
| 1277 | default: |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1278 | dev_warn(sciport_to_dev(iport), |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1279 | "%s: in wrong state: %d\n", __func__, state); |
| 1280 | return SCI_FAILURE_INVALID_STATE; |
| 1281 | } |
| 1282 | } |
| 1283 | |
| 1284 | /** |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1285 | * sci_port_remove_phy() - |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1286 | * @sci_port: This parameter specifies the port in which the phy will be added. |
| 1287 | * @sci_phy: This parameter is the phy which is to be added to the port. |
| 1288 | * |
| 1289 | * This method will remove the PHY from the selected PORT. This method returns |
| 1290 | * an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any |
| 1291 | * other status is a failure to add the phy to the port. |
| 1292 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1293 | enum sci_status sci_port_remove_phy(struct isci_port *iport, |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 1294 | struct isci_phy *iphy) |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1295 | { |
| 1296 | enum sci_status status; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1297 | enum sci_port_states state; |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1298 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1299 | state = iport->sm.current_state_id; |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1300 | |
| 1301 | switch (state) { |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1302 | case SCI_PORT_STOPPED: |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1303 | return sci_port_clear_phy(iport, iphy); |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1304 | case SCI_PORT_SUB_OPERATIONAL: |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1305 | status = sci_port_clear_phy(iport, iphy); |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1306 | if (status != SCI_SUCCESS) |
| 1307 | return status; |
| 1308 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1309 | sci_port_deactivate_phy(iport, iphy, true); |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1310 | iport->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; |
| 1311 | port_state_machine_change(iport, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1312 | SCI_PORT_SUB_CONFIGURING); |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1313 | return SCI_SUCCESS; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1314 | case SCI_PORT_SUB_CONFIGURING: |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1315 | status = sci_port_clear_phy(iport, iphy); |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1316 | |
| 1317 | if (status != SCI_SUCCESS) |
| 1318 | return status; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1319 | sci_port_deactivate_phy(iport, iphy, true); |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1320 | |
| 1321 | /* Re-enter the configuring state since this may be the last phy in |
| 1322 | * the port |
| 1323 | */ |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1324 | port_state_machine_change(iport, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1325 | SCI_PORT_SUB_CONFIGURING); |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1326 | return SCI_SUCCESS; |
| 1327 | default: |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1328 | dev_warn(sciport_to_dev(iport), |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1329 | "%s: in wrong state: %d\n", __func__, state); |
| 1330 | return SCI_FAILURE_INVALID_STATE; |
| 1331 | } |
| 1332 | } |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1333 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1334 | enum sci_status sci_port_link_up(struct isci_port *iport, |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 1335 | struct isci_phy *iphy) |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1336 | { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1337 | enum sci_port_states state; |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1338 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1339 | state = iport->sm.current_state_id; |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1340 | switch (state) { |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1341 | case SCI_PORT_SUB_WAITING: |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1342 | /* Since this is the first phy going link up for the port we |
| 1343 | * can just enable it and continue |
| 1344 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1345 | sci_port_activate_phy(iport, iphy, true); |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1346 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1347 | port_state_machine_change(iport, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1348 | SCI_PORT_SUB_OPERATIONAL); |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1349 | return SCI_SUCCESS; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1350 | case SCI_PORT_SUB_OPERATIONAL: |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1351 | sci_port_general_link_up_handler(iport, iphy, true); |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1352 | return SCI_SUCCESS; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1353 | case SCI_PORT_RESETTING: |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1354 | /* TODO We should make sure that the phy that has gone |
| 1355 | * link up is the same one on which we sent the reset. It is |
| 1356 | * possible that the phy on which we sent the reset is not the |
| 1357 | * one that has gone link up and we want to make sure that |
| 1358 | * phy being reset comes back. Consider the case where a |
| 1359 | * reset is sent but before the hardware processes the reset it |
| 1360 | * get a link up on the port because of a hot plug event. |
| 1361 | * because of the reset request this phy will go link down |
| 1362 | * almost immediately. |
| 1363 | */ |
| 1364 | |
| 1365 | /* In the resetting state we don't notify the user regarding |
| 1366 | * link up and link down notifications. |
| 1367 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1368 | sci_port_general_link_up_handler(iport, iphy, false); |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1369 | return SCI_SUCCESS; |
| 1370 | default: |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1371 | dev_warn(sciport_to_dev(iport), |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1372 | "%s: in wrong state: %d\n", __func__, state); |
| 1373 | return SCI_FAILURE_INVALID_STATE; |
| 1374 | } |
| 1375 | } |
| 1376 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1377 | enum sci_status sci_port_link_down(struct isci_port *iport, |
Dan Williams | 8528095 | 2011-06-28 15:05:53 -0700 | [diff] [blame] | 1378 | struct isci_phy *iphy) |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1379 | { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1380 | enum sci_port_states state; |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1381 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1382 | state = iport->sm.current_state_id; |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1383 | switch (state) { |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1384 | case SCI_PORT_SUB_OPERATIONAL: |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1385 | sci_port_deactivate_phy(iport, iphy, true); |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1386 | |
| 1387 | /* If there are no active phys left in the port, then |
| 1388 | * transition the port to the WAITING state until such time |
| 1389 | * as a phy goes link up |
| 1390 | */ |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1391 | if (iport->active_phy_mask == 0) |
| 1392 | port_state_machine_change(iport, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1393 | SCI_PORT_SUB_WAITING); |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1394 | return SCI_SUCCESS; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1395 | case SCI_PORT_RESETTING: |
Piotr Sawicki | 051266c | 2011-05-12 19:10:14 +0000 | [diff] [blame] | 1396 | /* In the resetting state we don't notify the user regarding |
| 1397 | * link up and link down notifications. */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1398 | sci_port_deactivate_phy(iport, iphy, false); |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1399 | return SCI_SUCCESS; |
| 1400 | default: |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1401 | dev_warn(sciport_to_dev(iport), |
Piotr Sawicki | bd6713b | 2011-05-12 19:10:03 +0000 | [diff] [blame] | 1402 | "%s: in wrong state: %d\n", __func__, state); |
| 1403 | return SCI_FAILURE_INVALID_STATE; |
| 1404 | } |
| 1405 | } |
| 1406 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1407 | enum sci_status sci_port_start_io(struct isci_port *iport, |
| 1408 | struct isci_remote_device *idev, |
| 1409 | struct isci_request *ireq) |
Dan Williams | 6813820 | 2011-05-12 07:16:06 -0700 | [diff] [blame] | 1410 | { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1411 | enum sci_port_states state; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1412 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1413 | state = iport->sm.current_state_id; |
Dan Williams | 6813820 | 2011-05-12 07:16:06 -0700 | [diff] [blame] | 1414 | switch (state) { |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1415 | case SCI_PORT_SUB_WAITING: |
Dan Williams | 6813820 | 2011-05-12 07:16:06 -0700 | [diff] [blame] | 1416 | return SCI_FAILURE_INVALID_STATE; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1417 | case SCI_PORT_SUB_OPERATIONAL: |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1418 | iport->started_request_count++; |
Dan Williams | 6813820 | 2011-05-12 07:16:06 -0700 | [diff] [blame] | 1419 | return SCI_SUCCESS; |
| 1420 | default: |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1421 | dev_warn(sciport_to_dev(iport), |
Dan Williams | 6813820 | 2011-05-12 07:16:06 -0700 | [diff] [blame] | 1422 | "%s: in wrong state: %d\n", __func__, state); |
| 1423 | return SCI_FAILURE_INVALID_STATE; |
| 1424 | } |
| 1425 | } |
| 1426 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1427 | enum sci_status sci_port_complete_io(struct isci_port *iport, |
| 1428 | struct isci_remote_device *idev, |
| 1429 | struct isci_request *ireq) |
Dan Williams | 6813820 | 2011-05-12 07:16:06 -0700 | [diff] [blame] | 1430 | { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1431 | enum sci_port_states state; |
Dan Williams | 6813820 | 2011-05-12 07:16:06 -0700 | [diff] [blame] | 1432 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1433 | state = iport->sm.current_state_id; |
Dan Williams | 6813820 | 2011-05-12 07:16:06 -0700 | [diff] [blame] | 1434 | switch (state) { |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1435 | case SCI_PORT_STOPPED: |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1436 | dev_warn(sciport_to_dev(iport), |
Dan Williams | 6813820 | 2011-05-12 07:16:06 -0700 | [diff] [blame] | 1437 | "%s: in wrong state: %d\n", __func__, state); |
| 1438 | return SCI_FAILURE_INVALID_STATE; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1439 | case SCI_PORT_STOPPING: |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1440 | sci_port_decrement_request_count(iport); |
Dan Williams | 6813820 | 2011-05-12 07:16:06 -0700 | [diff] [blame] | 1441 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1442 | if (iport->started_request_count == 0) |
| 1443 | port_state_machine_change(iport, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1444 | SCI_PORT_STOPPED); |
Dan Williams | 6813820 | 2011-05-12 07:16:06 -0700 | [diff] [blame] | 1445 | break; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1446 | case SCI_PORT_READY: |
| 1447 | case SCI_PORT_RESETTING: |
| 1448 | case SCI_PORT_FAILED: |
| 1449 | case SCI_PORT_SUB_WAITING: |
| 1450 | case SCI_PORT_SUB_OPERATIONAL: |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1451 | sci_port_decrement_request_count(iport); |
Dan Williams | 6813820 | 2011-05-12 07:16:06 -0700 | [diff] [blame] | 1452 | break; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1453 | case SCI_PORT_SUB_CONFIGURING: |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1454 | sci_port_decrement_request_count(iport); |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1455 | if (iport->started_request_count == 0) { |
| 1456 | port_state_machine_change(iport, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1457 | SCI_PORT_SUB_OPERATIONAL); |
Dan Williams | 6813820 | 2011-05-12 07:16:06 -0700 | [diff] [blame] | 1458 | } |
| 1459 | break; |
| 1460 | } |
| 1461 | return SCI_SUCCESS; |
| 1462 | } |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1463 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1464 | static void sci_port_enable_port_task_scheduler(struct isci_port *iport) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1465 | { |
| 1466 | u32 pts_control_value; |
| 1467 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1468 | /* enable the port task scheduler in a suspended state */ |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1469 | pts_control_value = readl(&iport->port_task_scheduler_registers->control); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1470 | pts_control_value |= SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND); |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1471 | writel(pts_control_value, &iport->port_task_scheduler_registers->control); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1472 | } |
| 1473 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1474 | static void sci_port_disable_port_task_scheduler(struct isci_port *iport) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1475 | { |
| 1476 | u32 pts_control_value; |
| 1477 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1478 | pts_control_value = readl(&iport->port_task_scheduler_registers->control); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1479 | pts_control_value &= |
| 1480 | ~(SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND)); |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1481 | writel(pts_control_value, &iport->port_task_scheduler_registers->control); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1482 | } |
| 1483 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1484 | static void sci_port_post_dummy_remote_node(struct isci_port *iport) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1485 | { |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1486 | struct isci_host *ihost = iport->owning_controller; |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1487 | u8 phys_index = iport->physical_port_index; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1488 | union scu_remote_node_context *rnc; |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1489 | u16 rni = iport->reserved_rni; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1490 | u32 command; |
| 1491 | |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1492 | rnc = &ihost->remote_node_context_table[rni]; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1493 | rnc->ssp.is_valid = true; |
| 1494 | |
| 1495 | command = SCU_CONTEXT_COMMAND_POST_RNC_32 | |
| 1496 | phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; |
| 1497 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1498 | sci_controller_post_request(ihost, command); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1499 | |
| 1500 | /* ensure hardware has seen the post rnc command and give it |
| 1501 | * ample time to act before sending the suspend |
| 1502 | */ |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1503 | readl(&ihost->smu_registers->interrupt_status); /* flush */ |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1504 | udelay(10); |
| 1505 | |
| 1506 | command = SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX | |
| 1507 | phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; |
| 1508 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1509 | sci_controller_post_request(ihost, command); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1510 | } |
| 1511 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1512 | static void sci_port_stopped_state_enter(struct sci_base_state_machine *sm) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1513 | { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1514 | struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1515 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1516 | if (iport->sm.previous_state_id == SCI_PORT_STOPPING) { |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1517 | /* |
| 1518 | * If we enter this state becasuse of a request to stop |
| 1519 | * the port then we want to disable the hardwares port |
| 1520 | * task scheduler. */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1521 | sci_port_disable_port_task_scheduler(iport); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1522 | } |
| 1523 | } |
| 1524 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1525 | static void sci_port_stopped_state_exit(struct sci_base_state_machine *sm) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1526 | { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1527 | struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1528 | |
| 1529 | /* Enable and suspend the port task scheduler */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1530 | sci_port_enable_port_task_scheduler(iport); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1531 | } |
| 1532 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1533 | static void sci_port_ready_state_enter(struct sci_base_state_machine *sm) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1534 | { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1535 | struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1536 | struct isci_host *ihost = iport->owning_controller; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1537 | u32 prev_state; |
| 1538 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1539 | prev_state = iport->sm.previous_state_id; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1540 | if (prev_state == SCI_PORT_RESETTING) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1541 | isci_port_hard_reset_complete(iport, SCI_SUCCESS); |
| 1542 | else |
| 1543 | isci_port_not_ready(ihost, iport); |
| 1544 | |
| 1545 | /* Post and suspend the dummy remote node context for this port. */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1546 | sci_port_post_dummy_remote_node(iport); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1547 | |
| 1548 | /* Start the ready substate machine */ |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1549 | port_state_machine_change(iport, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1550 | SCI_PORT_SUB_WAITING); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1551 | } |
| 1552 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1553 | static void sci_port_resetting_state_exit(struct sci_base_state_machine *sm) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1554 | { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1555 | struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1556 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1557 | sci_del_timer(&iport->timer); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1558 | } |
| 1559 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1560 | static void sci_port_stopping_state_exit(struct sci_base_state_machine *sm) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1561 | { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1562 | struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1563 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1564 | sci_del_timer(&iport->timer); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1565 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1566 | sci_port_destroy_dummy_resources(iport); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1567 | } |
| 1568 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1569 | static void sci_port_failed_state_enter(struct sci_base_state_machine *sm) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1570 | { |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1571 | struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1572 | |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1573 | isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT); |
| 1574 | } |
| 1575 | |
| 1576 | /* --------------------------------------------------------------------------- */ |
| 1577 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1578 | static const struct sci_base_state sci_port_state_table[] = { |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1579 | [SCI_PORT_STOPPED] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1580 | .enter_state = sci_port_stopped_state_enter, |
| 1581 | .exit_state = sci_port_stopped_state_exit |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1582 | }, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1583 | [SCI_PORT_STOPPING] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1584 | .exit_state = sci_port_stopping_state_exit |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1585 | }, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1586 | [SCI_PORT_READY] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1587 | .enter_state = sci_port_ready_state_enter, |
Piotr Sawicki | e91f41e | 2011-05-11 23:52:21 +0000 | [diff] [blame] | 1588 | }, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1589 | [SCI_PORT_SUB_WAITING] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1590 | .enter_state = sci_port_ready_substate_waiting_enter, |
Piotr Sawicki | e91f41e | 2011-05-11 23:52:21 +0000 | [diff] [blame] | 1591 | }, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1592 | [SCI_PORT_SUB_OPERATIONAL] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1593 | .enter_state = sci_port_ready_substate_operational_enter, |
| 1594 | .exit_state = sci_port_ready_substate_operational_exit |
Piotr Sawicki | e91f41e | 2011-05-11 23:52:21 +0000 | [diff] [blame] | 1595 | }, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1596 | [SCI_PORT_SUB_CONFIGURING] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1597 | .enter_state = sci_port_ready_substate_configuring_enter, |
| 1598 | .exit_state = sci_port_ready_substate_configuring_exit |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1599 | }, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1600 | [SCI_PORT_RESETTING] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1601 | .exit_state = sci_port_resetting_state_exit |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1602 | }, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1603 | [SCI_PORT_FAILED] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1604 | .enter_state = sci_port_failed_state_enter, |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1605 | } |
| 1606 | }; |
| 1607 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1608 | void sci_port_construct(struct isci_port *iport, u8 index, |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1609 | struct isci_host *ihost) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1610 | { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1611 | sci_init_sm(&iport->sm, sci_port_state_table, SCI_PORT_STOPPED); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1612 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1613 | iport->logical_port_index = SCIC_SDS_DUMMY_PORT; |
| 1614 | iport->physical_port_index = index; |
| 1615 | iport->active_phy_mask = 0; |
Jeff Skirvin | 8e35a13 | 2011-10-27 15:05:32 -0700 | [diff] [blame] | 1616 | iport->last_active_phy = 0; |
| 1617 | iport->ready_exit = false; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1618 | |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1619 | iport->owning_controller = ihost; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1620 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1621 | iport->started_request_count = 0; |
| 1622 | iport->assigned_device_count = 0; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1623 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1624 | iport->reserved_rni = SCU_DUMMY_INDEX; |
| 1625 | iport->reserved_tag = SCI_CONTROLLER_INVALID_IO_TAG; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1626 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1627 | sci_init_timer(&iport->timer, port_timeout); |
Edmund Nadolski | 5553ba2 | 2011-05-19 11:59:10 +0000 | [diff] [blame] | 1628 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1629 | iport->port_task_scheduler_registers = NULL; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1630 | |
| 1631 | for (index = 0; index < SCI_MAX_PHYS; index++) |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1632 | iport->phy_table[index] = NULL; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1633 | } |
| 1634 | |
| 1635 | void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index) |
| 1636 | { |
| 1637 | INIT_LIST_HEAD(&iport->remote_dev_list); |
| 1638 | INIT_LIST_HEAD(&iport->domain_dev_list); |
| 1639 | spin_lock_init(&iport->state_lock); |
| 1640 | init_completion(&iport->start_complete); |
| 1641 | iport->isci_host = ihost; |
| 1642 | isci_port_change_state(iport, isci_freed); |
| 1643 | } |
| 1644 | |
| 1645 | /** |
| 1646 | * isci_port_get_state() - This function gets the status of the port object. |
| 1647 | * @isci_port: This parameter points to the isci_port object |
| 1648 | * |
| 1649 | * status of the object as a isci_status enum. |
| 1650 | */ |
| 1651 | enum isci_status isci_port_get_state( |
| 1652 | struct isci_port *isci_port) |
| 1653 | { |
| 1654 | return isci_port->status; |
| 1655 | } |
| 1656 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1657 | void sci_port_broadcast_change_received(struct isci_port *iport, struct isci_phy *iphy) |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1658 | { |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1659 | struct isci_host *ihost = iport->owning_controller; |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1660 | |
| 1661 | /* notify the user. */ |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 1662 | isci_port_bc_change_received(ihost, iport, iphy); |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1663 | } |
| 1664 | |
Dan Williams | 4393aa4 | 2011-03-31 13:10:44 -0700 | [diff] [blame] | 1665 | int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport, |
| 1666 | struct isci_phy *iphy) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1667 | { |
Dan Williams | 4393aa4 | 2011-03-31 13:10:44 -0700 | [diff] [blame] | 1668 | unsigned long flags; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1669 | enum sci_status status; |
Jeff Skirvin | 8e35a13 | 2011-10-27 15:05:32 -0700 | [diff] [blame] | 1670 | int ret = TMF_RESP_FUNC_COMPLETE; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1671 | |
Dan Williams | 4393aa4 | 2011-03-31 13:10:44 -0700 | [diff] [blame] | 1672 | dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n", |
| 1673 | __func__, iport); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1674 | |
Dan Williams | 4393aa4 | 2011-03-31 13:10:44 -0700 | [diff] [blame] | 1675 | init_completion(&iport->hard_reset_complete); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1676 | |
Dan Williams | 4393aa4 | 2011-03-31 13:10:44 -0700 | [diff] [blame] | 1677 | spin_lock_irqsave(&ihost->scic_lock, flags); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1678 | |
| 1679 | #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1680 | status = sci_port_hard_reset(iport, ISCI_PORT_RESET_TIMEOUT); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1681 | |
Dan Williams | 4393aa4 | 2011-03-31 13:10:44 -0700 | [diff] [blame] | 1682 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1683 | |
| 1684 | if (status == SCI_SUCCESS) { |
Dan Williams | 4393aa4 | 2011-03-31 13:10:44 -0700 | [diff] [blame] | 1685 | wait_for_completion(&iport->hard_reset_complete); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1686 | |
Dan Williams | 4393aa4 | 2011-03-31 13:10:44 -0700 | [diff] [blame] | 1687 | dev_dbg(&ihost->pdev->dev, |
| 1688 | "%s: iport = %p; hard reset completion\n", |
| 1689 | __func__, iport); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1690 | |
Jeff Skirvin | 8e35a13 | 2011-10-27 15:05:32 -0700 | [diff] [blame] | 1691 | if (iport->hard_reset_status != SCI_SUCCESS) { |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1692 | ret = TMF_RESP_FUNC_FAILED; |
Jeff Skirvin | 8e35a13 | 2011-10-27 15:05:32 -0700 | [diff] [blame] | 1693 | |
| 1694 | dev_err(&ihost->pdev->dev, |
| 1695 | "%s: iport = %p; hard reset failed (0x%x)\n", |
| 1696 | __func__, iport, iport->hard_reset_status); |
| 1697 | } |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1698 | } else { |
| 1699 | ret = TMF_RESP_FUNC_FAILED; |
| 1700 | |
Dan Williams | 4393aa4 | 2011-03-31 13:10:44 -0700 | [diff] [blame] | 1701 | dev_err(&ihost->pdev->dev, |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1702 | "%s: iport = %p; sci_port_hard_reset call" |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1703 | " failed 0x%x\n", |
Dan Williams | 4393aa4 | 2011-03-31 13:10:44 -0700 | [diff] [blame] | 1704 | __func__, iport, status); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1705 | |
| 1706 | } |
| 1707 | |
| 1708 | /* If the hard reset for the port has failed, consider this |
| 1709 | * the same as link failures on all phys in the port. |
| 1710 | */ |
| 1711 | if (ret != TMF_RESP_FUNC_COMPLETE) { |
Jeff Skirvin | fd0527a | 2011-06-20 14:09:26 -0700 | [diff] [blame] | 1712 | |
Dan Williams | 4393aa4 | 2011-03-31 13:10:44 -0700 | [diff] [blame] | 1713 | dev_err(&ihost->pdev->dev, |
| 1714 | "%s: iport = %p; hard reset failed " |
Jeff Skirvin | fd0527a | 2011-06-20 14:09:26 -0700 | [diff] [blame] | 1715 | "(0x%x) - driving explicit link fail for all phys\n", |
| 1716 | __func__, iport, iport->hard_reset_status); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1717 | } |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1718 | return ret; |
| 1719 | } |
Dave Jiang | 09d7da1 | 2011-03-26 16:11:51 -0700 | [diff] [blame] | 1720 | |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1721 | /** |
| 1722 | * isci_port_deformed() - This function is called by libsas when a port becomes |
| 1723 | * inactive. |
| 1724 | * @phy: This parameter specifies the libsas phy with the inactive port. |
| 1725 | * |
| 1726 | */ |
| 1727 | void isci_port_deformed(struct asd_sas_phy *phy) |
Dave Jiang | 09d7da1 | 2011-03-26 16:11:51 -0700 | [diff] [blame] | 1728 | { |
Dan Williams | e2f8db5 | 2011-05-10 02:28:46 -0700 | [diff] [blame] | 1729 | pr_debug("%s: sas_phy = %p\n", __func__, phy); |
| 1730 | } |
| 1731 | |
| 1732 | /** |
| 1733 | * isci_port_formed() - This function is called by libsas when a port becomes |
| 1734 | * active. |
| 1735 | * @phy: This parameter specifies the libsas phy with the active port. |
| 1736 | * |
| 1737 | */ |
| 1738 | void isci_port_formed(struct asd_sas_phy *phy) |
| 1739 | { |
| 1740 | pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port); |
Dave Jiang | 09d7da1 | 2011-03-26 16:11:51 -0700 | [diff] [blame] | 1741 | } |