Marshall Dawson | 68243a5 | 2017-06-15 16:59:20 -0600 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2017 Advanced Micro Devices, Inc. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | */ |
| 15 | |
| 16 | #include <arch/io.h> |
Marshall Dawson | 596ecec | 2017-10-12 16:04:08 -0600 | [diff] [blame] | 17 | #include <cbfs.h> |
| 18 | #include <region_file.h> |
Marshall Dawson | 68243a5 | 2017-06-15 16:59:20 -0600 | [diff] [blame] | 19 | #include <timer.h> |
| 20 | #include <device/pci_def.h> |
Marshall Dawson | d1cc3c2 | 2017-12-08 12:46:11 -0700 | [diff] [blame^] | 21 | #include <bootstate.h> |
Marshall Dawson | 68243a5 | 2017-06-15 16:59:20 -0600 | [diff] [blame] | 22 | #include <console/console.h> |
| 23 | #include <amdblocks/psp.h> |
| 24 | |
| 25 | static const char *psp_status_nobase = "error: PSP BAR3 not assigned"; |
| 26 | static const char *psp_status_halted = "error: PSP in halted state"; |
| 27 | static const char *psp_status_recovery = "error: PSP recovery required"; |
| 28 | static const char *psp_status_errcmd = "error sending command"; |
| 29 | static const char *psp_status_init_timeout = "error: PSP init timeout"; |
| 30 | static const char *psp_status_cmd_timeout = "error: PSP command timeout"; |
| 31 | static const char *psp_status_noerror = ""; |
| 32 | |
| 33 | static const char *status_to_string(int err) |
| 34 | { |
| 35 | switch (err) { |
| 36 | case -PSPSTS_NOBASE: |
| 37 | return psp_status_nobase; |
| 38 | case -PSPSTS_HALTED: |
| 39 | return psp_status_halted; |
| 40 | case -PSPSTS_RECOVERY: |
| 41 | return psp_status_recovery; |
| 42 | case -PSPSTS_SEND_ERROR: |
| 43 | return psp_status_errcmd; |
| 44 | case -PSPSTS_INIT_TIMEOUT: |
| 45 | return psp_status_init_timeout; |
| 46 | case -PSPSTS_CMD_TIMEOUT: |
| 47 | return psp_status_cmd_timeout; |
| 48 | default: |
| 49 | return psp_status_noerror; |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | static struct psp_mbox *get_mbox_address(void) |
| 54 | { |
| 55 | UINT32 base; /* UINT32 for compatibility with PspBaseLib */ |
| 56 | BOOLEAN bar3_status; |
| 57 | uintptr_t baseptr; |
| 58 | |
| 59 | bar3_status = GetPspBar3Addr(&base); |
| 60 | if (!bar3_status) { |
| 61 | PspBarInitEarly(); |
| 62 | bar3_status = GetPspBar3Addr(&base); |
| 63 | } |
| 64 | if (!bar3_status) |
| 65 | return NULL; |
| 66 | |
| 67 | baseptr = base; |
| 68 | return (struct psp_mbox *)(baseptr + PSP_MAILBOX_BASE); |
| 69 | } |
| 70 | |
| 71 | static u32 rd_mbox_sts(struct psp_mbox *mbox) |
| 72 | { |
| 73 | return read32(&mbox->mbox_status); |
| 74 | } |
| 75 | |
| 76 | static void wr_mbox_cmd(struct psp_mbox *mbox, u32 cmd) |
| 77 | { |
| 78 | write32(&mbox->mbox_command, cmd); |
| 79 | } |
| 80 | |
| 81 | static u32 rd_mbox_cmd(struct psp_mbox *mbox) |
| 82 | { |
| 83 | return read32(&mbox->mbox_command); |
| 84 | } |
| 85 | |
| 86 | static void wr_mbox_cmd_resp(struct psp_mbox *mbox, void *buffer) |
| 87 | { |
| 88 | write64(&mbox->cmd_response, (uintptr_t)buffer); |
| 89 | } |
| 90 | |
| 91 | static u32 rd_resp_sts(struct mbox_default_buffer *buffer) |
| 92 | { |
| 93 | return read32(&buffer->header.status); |
| 94 | } |
| 95 | |
| 96 | static int wait_initialized(struct psp_mbox *mbox) |
| 97 | { |
| 98 | struct stopwatch sw; |
| 99 | |
| 100 | stopwatch_init_msecs_expire(&sw, PSP_INIT_TIMEOUT); |
| 101 | |
| 102 | do { |
| 103 | if (rd_mbox_sts(mbox) & STATUS_INITIALIZED) |
| 104 | return 0; |
| 105 | } while (!stopwatch_expired(&sw)); |
| 106 | |
| 107 | return -PSPSTS_INIT_TIMEOUT; |
| 108 | } |
| 109 | |
| 110 | static int wait_command(struct psp_mbox *mbox) |
| 111 | { |
| 112 | struct stopwatch sw; |
| 113 | |
| 114 | stopwatch_init_msecs_expire(&sw, PSP_CMD_TIMEOUT); |
| 115 | |
| 116 | do { |
| 117 | if (!rd_mbox_cmd(mbox)) |
| 118 | return 0; |
| 119 | } while (!stopwatch_expired(&sw)); |
| 120 | |
| 121 | return -PSPSTS_CMD_TIMEOUT; |
| 122 | } |
| 123 | |
| 124 | static int send_psp_command(u32 command, void *buffer) |
| 125 | { |
Marshall Dawson | 68243a5 | 2017-06-15 16:59:20 -0600 | [diff] [blame] | 126 | struct psp_mbox *mbox = get_mbox_address(); |
| 127 | if (!mbox) |
| 128 | return -PSPSTS_NOBASE; |
| 129 | |
Marshall Dawson | 68243a5 | 2017-06-15 16:59:20 -0600 | [diff] [blame] | 130 | /* check for PSP error conditions */ |
Marshall Dawson | 33c8773 | 2017-12-13 10:24:41 -0700 | [diff] [blame] | 131 | if (rd_mbox_sts(mbox) & STATUS_HALT) |
| 132 | return -PSPSTS_HALTED; |
| 133 | |
| 134 | if (rd_mbox_sts(mbox) & STATUS_RECOVERY) |
| 135 | return -PSPSTS_RECOVERY; |
Marshall Dawson | 68243a5 | 2017-06-15 16:59:20 -0600 | [diff] [blame] | 136 | |
| 137 | /* PSP must be finished with init and ready to accept a command */ |
Marshall Dawson | 33c8773 | 2017-12-13 10:24:41 -0700 | [diff] [blame] | 138 | if (wait_initialized(mbox)) |
| 139 | return -PSPSTS_INIT_TIMEOUT; |
| 140 | |
| 141 | if (wait_command(mbox)) |
| 142 | return -PSPSTS_CMD_TIMEOUT; |
Marshall Dawson | 68243a5 | 2017-06-15 16:59:20 -0600 | [diff] [blame] | 143 | |
| 144 | /* set address of command-response buffer and write command register */ |
| 145 | wr_mbox_cmd_resp(mbox, buffer); |
| 146 | wr_mbox_cmd(mbox, command); |
| 147 | |
| 148 | /* PSP clears command register when complete */ |
Marshall Dawson | 33c8773 | 2017-12-13 10:24:41 -0700 | [diff] [blame] | 149 | if (wait_command(mbox)) |
| 150 | return -PSPSTS_CMD_TIMEOUT; |
Marshall Dawson | 68243a5 | 2017-06-15 16:59:20 -0600 | [diff] [blame] | 151 | |
| 152 | /* check delivery status */ |
Marshall Dawson | 33c8773 | 2017-12-13 10:24:41 -0700 | [diff] [blame] | 153 | if (rd_mbox_sts(mbox) & (STATUS_ERROR | STATUS_TERMINATED)) |
| 154 | return -PSPSTS_SEND_ERROR; |
| 155 | |
| 156 | return 0; |
Marshall Dawson | 68243a5 | 2017-06-15 16:59:20 -0600 | [diff] [blame] | 157 | } |
| 158 | |
| 159 | /* |
| 160 | * Notify the PSP that DRAM is present. Upon receiving this command, the PSP |
| 161 | * will load its OS into fenced DRAM that is not accessible to the x86 cores. |
| 162 | */ |
| 163 | int psp_notify_dram(void) |
| 164 | { |
Marshall Dawson | 68243a5 | 2017-06-15 16:59:20 -0600 | [diff] [blame] | 165 | int cmd_status; |
Marshall Dawson | 66dd399 | 2017-12-13 10:51:13 -0700 | [diff] [blame] | 166 | struct mbox_default_buffer buffer = { |
| 167 | .header = { |
| 168 | .size = sizeof(buffer) |
| 169 | } |
| 170 | }; |
Marshall Dawson | 68243a5 | 2017-06-15 16:59:20 -0600 | [diff] [blame] | 171 | |
| 172 | printk(BIOS_DEBUG, "PSP: Notify that DRAM is available... "); |
| 173 | |
Marshall Dawson | 68243a5 | 2017-06-15 16:59:20 -0600 | [diff] [blame] | 174 | cmd_status = send_psp_command(MBOX_BIOS_CMD_DRAM_INFO, &buffer); |
| 175 | |
| 176 | /* buffer's status shouldn't change but report it if it does */ |
| 177 | if (rd_resp_sts(&buffer)) |
| 178 | printk(BIOS_DEBUG, "buffer status=0x%x ", |
| 179 | rd_resp_sts(&buffer)); |
| 180 | if (cmd_status) |
| 181 | printk(BIOS_DEBUG, "%s\n", status_to_string(cmd_status)); |
| 182 | else |
| 183 | printk(BIOS_DEBUG, "OK\n"); |
| 184 | |
| 185 | return cmd_status; |
| 186 | } |
Marshall Dawson | 596ecec | 2017-10-12 16:04:08 -0600 | [diff] [blame] | 187 | |
| 188 | /* |
Marshall Dawson | d1cc3c2 | 2017-12-08 12:46:11 -0700 | [diff] [blame^] | 189 | * Notify the PSP that the system is completing the boot process. Upon |
| 190 | * receiving this command, the PSP will only honor commands where the buffer |
| 191 | * is in SMM space. |
| 192 | */ |
| 193 | static void psp_notify_boot_done(void *unused) |
| 194 | { |
| 195 | int cmd_status; |
| 196 | struct mbox_default_buffer buffer = { |
| 197 | .header = { |
| 198 | .size = sizeof(buffer) |
| 199 | } |
| 200 | }; |
| 201 | |
| 202 | printk(BIOS_DEBUG, "PSP: Notify that POST is finishing... "); |
| 203 | |
| 204 | cmd_status = send_psp_command(MBOX_BIOS_CMD_BOOT_DONE, &buffer); |
| 205 | |
| 206 | /* buffer's status shouldn't change but report it if it does */ |
| 207 | if (rd_resp_sts(&buffer)) |
| 208 | printk(BIOS_DEBUG, "buffer status=0x%x ", |
| 209 | rd_resp_sts(&buffer)); |
| 210 | if (cmd_status) |
| 211 | printk(BIOS_DEBUG, "%s\n", status_to_string(cmd_status)); |
| 212 | else |
| 213 | printk(BIOS_DEBUG, "OK\n"); |
| 214 | } |
| 215 | |
| 216 | /* |
Marshall Dawson | 596ecec | 2017-10-12 16:04:08 -0600 | [diff] [blame] | 217 | * Tell the PSP to load a firmware blob from a location in the BIOS image. |
| 218 | */ |
| 219 | static int psp_load_blob(int type, void *addr) |
| 220 | { |
| 221 | int cmd_status; |
| 222 | |
| 223 | if (!IS_ENABLED(CONFIG_SOC_AMD_PSP_SELECTABLE_SMU_FW)) { |
| 224 | printk(BIOS_ERR, "BUG: Selectable firmware is not supported\n"); |
| 225 | return PSPSTS_UNSUPPORTED; |
| 226 | } |
| 227 | |
| 228 | /* only two types currently supported */ |
| 229 | if (type != MBOX_BIOS_CMD_SMU_FW && type != MBOX_BIOS_CMD_SMU_FW2) { |
| 230 | printk(BIOS_ERR, "BUG: Invalid PSP blob type %x\n", type); |
| 231 | return PSPSTS_INVALID_BLOB; |
| 232 | } |
| 233 | |
| 234 | printk(BIOS_DEBUG, "PSP: Load blob type %x from @%p... ", type, addr); |
| 235 | |
| 236 | /* Blob commands use the buffer registers as data, not pointer to buf */ |
| 237 | cmd_status = send_psp_command(type, addr); |
| 238 | |
| 239 | if (cmd_status) |
| 240 | printk(BIOS_DEBUG, "%s\n", status_to_string(cmd_status)); |
| 241 | else |
| 242 | printk(BIOS_DEBUG, "OK\n"); |
| 243 | |
| 244 | return cmd_status; |
| 245 | } |
| 246 | |
| 247 | int psp_load_named_blob(int type, const char *name) |
| 248 | { |
| 249 | void *blob; |
| 250 | struct cbfsf cbfs_file; |
| 251 | struct region_device rdev; |
| 252 | int r; |
| 253 | |
| 254 | if (cbfs_boot_locate(&cbfs_file, name, NULL)) { |
| 255 | printk(BIOS_ERR, "BUG: Cannot locate blob for PSP loading\n"); |
| 256 | return PSPSTS_INVALID_NAME; |
| 257 | } |
| 258 | |
| 259 | cbfs_file_data(&rdev, &cbfs_file); |
| 260 | blob = rdev_mmap_full(&rdev); |
| 261 | if (blob) { |
| 262 | r = psp_load_blob(type, blob); |
| 263 | rdev_munmap(&rdev, blob); |
| 264 | } else { |
| 265 | printk(BIOS_ERR, "BUG: Cannot map blob for PSP loading\n"); |
| 266 | return PSPSTS_INVALID_NAME; |
| 267 | } |
| 268 | return r; |
| 269 | } |
Marshall Dawson | d1cc3c2 | 2017-12-08 12:46:11 -0700 | [diff] [blame^] | 270 | |
| 271 | BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_BOOT, BS_ON_ENTRY, |
| 272 | psp_notify_boot_done, NULL); |