drivers/fpga/stratix10.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2018 Intel Corporation <www.intel.com>
   4  */
   5
   6 #include <common.h>
   7 #include <altera.h>
   8 #include <asm/arch/mailbox_s10.h>
   9
  10 #define RECONFIG_STATUS_POLL_RESP_TIMEOUT_MS            60000
  11 #define RECONFIG_STATUS_INTERVAL_DELAY_US               1000000
  12
  13 static const struct mbox_cfgstat_state {
  14         int                     err_no;
  15         const char              *error_name;
  16 } mbox_cfgstat_state[] = {
  17         {MBOX_CFGSTAT_STATE_IDLE, "FPGA in idle mode."},
  18         {MBOX_CFGSTAT_STATE_CONFIG, "FPGA in config mode."},
  19         {MBOX_CFGSTAT_STATE_FAILACK, "Acknowledgment failed!"},
  20         {MBOX_CFGSTAT_STATE_ERROR_INVALID, "Invalid bitstream!"},
  21         {MBOX_CFGSTAT_STATE_ERROR_CORRUPT, "Corrupted bitstream!"},
  22         {MBOX_CFGSTAT_STATE_ERROR_AUTH, "Authentication failed!"},
  23         {MBOX_CFGSTAT_STATE_ERROR_CORE_IO, "I/O error!"},
  24         {MBOX_CFGSTAT_STATE_ERROR_HARDWARE, "Hardware error!"},
  25         {MBOX_CFGSTAT_STATE_ERROR_FAKE, "Fake error!"},
  26         {MBOX_CFGSTAT_STATE_ERROR_BOOT_INFO, "Error in boot info!"},
  27         {MBOX_CFGSTAT_STATE_ERROR_QSPI_ERROR, "Error in QSPI!"},
  28         {MBOX_RESP_ERROR, "Mailbox general error!"},
  29         {-ETIMEDOUT, "I/O timeout error"},
  30         {-1, "Unknown error!"}
  31 };
  32
  33 #define MBOX_CFGSTAT_MAX ARRAY_SIZE(mbox_cfgstat_state)
  34
  35 static const char *mbox_cfgstat_to_str(int err)
  36 {
  37         int i;
  38
  39         for (i = 0; i < MBOX_CFGSTAT_MAX - 1; i++) {
  40                 if (mbox_cfgstat_state[i].err_no == err)
  41                         return mbox_cfgstat_state[i].error_name;
  42         }
  43
  44         return mbox_cfgstat_state[MBOX_CFGSTAT_MAX - 1].error_name;
  45 }
  46
  47 /*
  48  * Add the ongoing transaction's command ID into pending list and return
  49  * the command ID for next transfer.
  50  */
  51 static u8 add_transfer(u32 *xfer_pending_list, size_t list_size, u8 id)
  52 {
  53         int i;
  54
  55         for (i = 0; i < list_size; i++) {
  56                 if (xfer_pending_list[i])
  57                         continue;
  58                 xfer_pending_list[i] = id;
  59                 debug("ID(%d) added to transaction pending list\n", id);
  60                 /*
  61                  * Increment command ID for next transaction.
  62                  * Valid command ID (4 bits) is from 1 to 15.
  63                  */
  64                 id = (id % 15) + 1;
  65                 break;
  66         }
  67
  68         return id;
  69 }
  70
  71 /*
  72  * Check whether response ID match the command ID in the transfer
  73  * pending list. If a match is found in the transfer pending list,
  74  * it clears the transfer pending list and return the matched
  75  * command ID.
  76  */
  77 static int get_and_clr_transfer(u32 *xfer_pending_list, size_t list_size,
  78                                 u8 id)
  79 {
  80         int i;
  81
  82         for (i = 0; i < list_size; i++) {
  83                 if (id != xfer_pending_list[i])
  84                         continue;
  85                 xfer_pending_list[i] = 0;
  86                 return id;
  87         }
  88
  89         return 0;
  90 }
  91
  92 /*
  93  * Polling the FPGA configuration status.
  94  * Return 0 for success, non-zero for error.
  95  */
  96 static int reconfig_status_polling_resp(void)
  97 {
  98         int ret;
  99         unsigned long start = get_timer(0);
 100
 101         while (1) {
 102                 ret = mbox_get_fpga_config_status(MBOX_RECONFIG_STATUS);
 103                 if (!ret)
 104                         return 0;       /* configuration success */
 105
 106                 if (ret != MBOX_CFGSTAT_STATE_CONFIG)
 107                         return ret;
 108
 109                 if (get_timer(start) > RECONFIG_STATUS_POLL_RESP_TIMEOUT_MS)
 110                         break;  /* time out */
 111
 112                 puts(".");
 113                 udelay(RECONFIG_STATUS_INTERVAL_DELAY_US);
 114         }
 115
 116         return -ETIMEDOUT;
 117 }
 118
 119 static u32 get_resp_hdr(u32 *r_index, u32 *w_index, u32 *resp_count,
 120                         u32 *resp_buf, u32 buf_size, u32 client_id)
 121 {
 122         u32 buf[MBOX_RESP_BUFFER_SIZE];
 123         u32 mbox_hdr;
 124         u32 resp_len;
 125         u32 hdr_len;
 126         u32 i;
 127
 128         if (*resp_count < buf_size) {
 129                 u32 rcv_len_max = buf_size - *resp_count;
 130
 131                 if (rcv_len_max > MBOX_RESP_BUFFER_SIZE)
 132                         rcv_len_max = MBOX_RESP_BUFFER_SIZE;
 133                 resp_len = mbox_rcv_resp(buf, rcv_len_max);
 134
 135                 for (i = 0; i < resp_len; i++) {
 136                         resp_buf[(*w_index)++] = buf[i];
 137                         *w_index %= buf_size;
 138                         (*resp_count)++;
 139                 }
 140         }
 141
 142         /* No response in buffer */
 143         if (*resp_count == 0)
 144                 return 0;
 145
 146         mbox_hdr = resp_buf[*r_index];
 147
 148         hdr_len = MBOX_RESP_LEN_GET(mbox_hdr);
 149
 150         /* Insufficient header length to return a mailbox header */
 151         if ((*resp_count - 1) < hdr_len)
 152                 return 0;
 153
 154         *r_index += (hdr_len + 1);
 155         *r_index %= buf_size;
 156         *resp_count -= (hdr_len + 1);
 157
 158         /* Make sure response belongs to us */
 159         if (MBOX_RESP_CLIENT_GET(mbox_hdr) != client_id)
 160                 return 0;
 161
 162         return mbox_hdr;
 163 }
 164
 165 /* Send bit stream data to SDM via RECONFIG_DATA mailbox command */
 166 static int send_reconfig_data(const void *rbf_data, size_t rbf_size,
 167                               u32 xfer_max, u32 buf_size_max)
 168 {
 169         u32 response_buffer[MBOX_RESP_BUFFER_SIZE];
 170         u32 xfer_pending[MBOX_RESP_BUFFER_SIZE];
 171         u32 resp_rindex = 0;
 172         u32 resp_windex = 0;
 173         u32 resp_count = 0;
 174         u32 xfer_count = 0;
 175         int resp_err = 0;
 176         u8 cmd_id = 1;
 177         u32 args[3];
 178         int ret;
 179
 180         debug("SDM xfer_max = %d\n", xfer_max);
 181         debug("SDM buf_size_max = %x\n\n", buf_size_max);
 182
 183         memset(xfer_pending, 0, sizeof(xfer_pending));
 184
 185         while (rbf_size || xfer_count) {
 186                 if (!resp_err && rbf_size && xfer_count < xfer_max) {
 187                         args[0] = MBOX_ARG_DESC_COUNT(1);
 188                         args[1] = (u64)rbf_data;
 189                         if (rbf_size >= buf_size_max) {
 190                                 args[2] = buf_size_max;
 191                                 rbf_size -= buf_size_max;
 192                                 rbf_data += buf_size_max;
 193                         } else {
 194                                 args[2] = (u64)rbf_size;
 195                                 rbf_size = 0;
 196                         }
 197
 198                         resp_err = mbox_send_cmd_only(cmd_id, MBOX_RECONFIG_DATA,
 199                                                  MBOX_CMD_INDIRECT, 3, args);
 200                         if (!resp_err) {
 201                                 xfer_count++;
 202                                 cmd_id = add_transfer(xfer_pending,
 203                                                       MBOX_RESP_BUFFER_SIZE,
 204                                                       cmd_id);
 205                         }
 206                         puts(".");
 207                 } else {
 208                         u32 resp_hdr = get_resp_hdr(&resp_rindex, &resp_windex,
 209                                                     &resp_count,
 210                                                     response_buffer,
 211                                                     MBOX_RESP_BUFFER_SIZE,
 212                                                     MBOX_CLIENT_ID_UBOOT);
 213
 214                         /*
 215                          * If no valid response header found or
 216                          * non-zero length from RECONFIG_DATA
 217                          */
 218                         if (!resp_hdr || MBOX_RESP_LEN_GET(resp_hdr))
 219                                 continue;
 220
 221                         /* Check for response's status */
 222                         if (!resp_err) {
 223                                 resp_err = MBOX_RESP_ERR_GET(resp_hdr);
 224                                 debug("Response error code: %08x\n", resp_err);
 225                         }
 226
 227                         ret = get_and_clr_transfer(xfer_pending,
 228                                                    MBOX_RESP_BUFFER_SIZE,
 229                                                    MBOX_RESP_ID_GET(resp_hdr));
 230                         if (ret) {
 231                                 /* Claim and reuse the ID */
 232                                 cmd_id = (u8)ret;
 233                                 xfer_count--;
 234                         }
 235
 236                         if (resp_err && !xfer_count)
 237                                 return resp_err;
 238                 }
 239         }
 240
 241         return 0;
 242 }
 243
 244 /*
 245  * This is the interface used by FPGA driver.
 246  * Return 0 for success, non-zero for error.
 247  */
 248 int stratix10_load(Altera_desc *desc, const void *rbf_data, size_t rbf_size)
 249 {
 250         int ret;
 251         u32 resp_len = 2;
 252         u32 resp_buf[2];
 253
 254         debug("Sending MBOX_RECONFIG...\n");
 255         ret = mbox_send_cmd(MBOX_ID_UBOOT, MBOX_RECONFIG, MBOX_CMD_DIRECT, 0,
 256                             NULL, 0, &resp_len, resp_buf);
 257         if (ret) {
 258                 puts("Failure in RECONFIG mailbox command!\n");
 259                 return ret;
 260         }
 261
 262         ret = send_reconfig_data(rbf_data, rbf_size, resp_buf[0], resp_buf[1]);
 263         if (ret) {
 264                 printf("RECONFIG_DATA error: %08x, %s\n", ret,
 265                        mbox_cfgstat_to_str(ret));
 266                 return ret;
 267         }
 268
 269         /* Make sure we don't send MBOX_RECONFIG_STATUS too fast */
 270         udelay(RECONFIG_STATUS_INTERVAL_DELAY_US);
 271
 272         debug("Polling with MBOX_RECONFIG_STATUS...\n");
 273         ret = reconfig_status_polling_resp();
 274         if (ret) {
 275                 printf("RECONFIG_STATUS Error: %08x, %s\n", ret,
 276                        mbox_cfgstat_to_str(ret));
 277                 return ret;
 278         }
 279
 280         puts("FPGA reconfiguration OK!\n");
 281
 282         return ret;
 283 }