drivers/net/ethernet/pensando/ionic/ionic_fw.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 2020 Pensando Systems, Inc */
   3
   4 #include <linux/kernel.h>
   5 #include <linux/types.h>
   6 #include <linux/errno.h>
   7 #include <linux/firmware.h>
   8
   9 #include "ionic.h"
  10 #include "ionic_dev.h"
  11 #include "ionic_lif.h"
  12 #include "ionic_devlink.h"
  13
  14 /* The worst case wait for the install activity is about 25 minutes when
  15  * installing a new CPLD, which is very seldom.  Normal is about 30-35
  16  * seconds.  Since the driver can't tell if a CPLD update will happen we
  17  * set the timeout for the ugly case.
  18  */
  19 #define IONIC_FW_INSTALL_TIMEOUT        (25 * 60)
  20 #define IONIC_FW_SELECT_TIMEOUT         30
  21
  22 /* Number of periodic log updates during fw file download */
  23 #define IONIC_FW_INTERVAL_FRACTION      32
  24
  25 static void ionic_dev_cmd_firmware_download(struct ionic_dev *idev, u64 addr,
  26                                             u32 offset, u32 length)
  27 {
  28         union ionic_dev_cmd cmd = {
  29                 .fw_download.opcode = IONIC_CMD_FW_DOWNLOAD,
  30                 .fw_download.offset = cpu_to_le32(offset),
  31                 .fw_download.addr = cpu_to_le64(addr),
  32                 .fw_download.length = cpu_to_le32(length),
  33         };
  34
  35         ionic_dev_cmd_go(idev, &cmd);
  36 }
  37
  38 static void ionic_dev_cmd_firmware_install(struct ionic_dev *idev)
  39 {
  40         union ionic_dev_cmd cmd = {
  41                 .fw_control.opcode = IONIC_CMD_FW_CONTROL,
  42                 .fw_control.oper = IONIC_FW_INSTALL_ASYNC
  43         };
  44
  45         ionic_dev_cmd_go(idev, &cmd);
  46 }
  47
  48 static void ionic_dev_cmd_firmware_activate(struct ionic_dev *idev, u8 slot)
  49 {
  50         union ionic_dev_cmd cmd = {
  51                 .fw_control.opcode = IONIC_CMD_FW_CONTROL,
  52                 .fw_control.oper = IONIC_FW_ACTIVATE_ASYNC,
  53                 .fw_control.slot = slot
  54         };
  55
  56         ionic_dev_cmd_go(idev, &cmd);
  57 }
  58
  59 static int ionic_fw_status_long_wait(struct ionic *ionic,
  60                                      const char *label,
  61                                      unsigned long timeout,
  62                                      u8 fw_cmd,
  63                                      struct netlink_ext_ack *extack)
  64 {
  65         union ionic_dev_cmd cmd = {
  66                 .fw_control.opcode = IONIC_CMD_FW_CONTROL,
  67                 .fw_control.oper = fw_cmd,
  68         };
  69         unsigned long start_time;
  70         unsigned long end_time;
  71         int err;
  72
  73         start_time = jiffies;
  74         end_time = start_time + (timeout * HZ);
  75         do {
  76                 mutex_lock(&ionic->dev_cmd_lock);
  77                 ionic_dev_cmd_go(&ionic->idev, &cmd);
  78                 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
  79                 mutex_unlock(&ionic->dev_cmd_lock);
  80
  81                 msleep(20);
  82         } while (time_before(jiffies, end_time) && (err == -EAGAIN || err == -ETIMEDOUT));
  83
  84         if (err == -EAGAIN || err == -ETIMEDOUT) {
  85                 NL_SET_ERR_MSG_MOD(extack, "Firmware wait timed out");
  86                 dev_err(ionic->dev, "DEV_CMD firmware wait %s timed out\n", label);
  87         } else if (err) {
  88                 NL_SET_ERR_MSG_MOD(extack, "Firmware wait failed");
  89         }
  90
  91         return err;
  92 }
  93
  94 int ionic_firmware_update(struct ionic_lif *lif, const struct firmware *fw,
  95                           struct netlink_ext_ack *extack)
  96 {
  97         struct ionic_dev *idev = &lif->ionic->idev;
  98         struct net_device *netdev = lif->netdev;
  99         struct ionic *ionic = lif->ionic;
 100         union ionic_dev_cmd_comp comp;
 101         u32 buf_sz, copy_sz, offset;
 102         struct devlink *dl;
 103         int next_interval;
 104         int err = 0;
 105         u8 fw_slot;
 106
 107         netdev_info(netdev, "Installing firmware\n");
 108
 109         dl = priv_to_devlink(ionic);
 110         devlink_flash_update_status_notify(dl, "Preparing to flash", NULL, 0, 0);
 111
 112         if (!idev->dev_cmd_regs) {
 113                 err = -ENXIO;
 114                 goto err_out;
 115         }
 116
 117         buf_sz = sizeof(idev->dev_cmd_regs->data);
 118
 119         netdev_dbg(netdev,
 120                    "downloading firmware - size %d part_sz %d nparts %lu\n",
 121                    (int)fw->size, buf_sz, DIV_ROUND_UP(fw->size, buf_sz));
 122
 123         offset = 0;
 124         next_interval = 0;
 125         while (offset < fw->size) {
 126                 if (offset >= next_interval) {
 127                         devlink_flash_update_status_notify(dl, "Downloading", NULL,
 128                                                            offset, fw->size);
 129                         next_interval = offset + (fw->size / IONIC_FW_INTERVAL_FRACTION);
 130                 }
 131
 132                 copy_sz = min_t(unsigned int, buf_sz, fw->size - offset);
 133                 mutex_lock(&ionic->dev_cmd_lock);
 134                 memcpy_toio(&idev->dev_cmd_regs->data, fw->data + offset, copy_sz);
 135                 ionic_dev_cmd_firmware_download(idev,
 136                                                 offsetof(union ionic_dev_cmd_regs, data),
 137                                                 offset, copy_sz);
 138                 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 139                 mutex_unlock(&ionic->dev_cmd_lock);
 140                 if (err) {
 141                         netdev_err(netdev,
 142                                    "download failed offset 0x%x addr 0x%lx len 0x%x\n",
 143                                    offset, offsetof(union ionic_dev_cmd_regs, data),
 144                                    copy_sz);
 145                         NL_SET_ERR_MSG_MOD(extack, "Segment download failed");
 146                         goto err_out;
 147                 }
 148                 offset += copy_sz;
 149         }
 150         devlink_flash_update_status_notify(dl, "Downloading", NULL,
 151                                            fw->size, fw->size);
 152
 153         devlink_flash_update_timeout_notify(dl, "Installing", NULL,
 154                                             IONIC_FW_INSTALL_TIMEOUT);
 155
 156         mutex_lock(&ionic->dev_cmd_lock);
 157         ionic_dev_cmd_firmware_install(idev);
 158         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 159         ionic_dev_cmd_comp(idev, (union ionic_dev_cmd_comp *)&comp);
 160         fw_slot = comp.fw_control.slot;
 161         mutex_unlock(&ionic->dev_cmd_lock);
 162         if (err) {
 163                 NL_SET_ERR_MSG_MOD(extack, "Failed to start firmware install");
 164                 goto err_out;
 165         }
 166
 167         err = ionic_fw_status_long_wait(ionic, "Installing",
 168                                         IONIC_FW_INSTALL_TIMEOUT,
 169                                         IONIC_FW_INSTALL_STATUS,
 170                                         extack);
 171         if (err)
 172                 goto err_out;
 173
 174         devlink_flash_update_timeout_notify(dl, "Selecting", NULL,
 175                                             IONIC_FW_SELECT_TIMEOUT);
 176
 177         mutex_lock(&ionic->dev_cmd_lock);
 178         ionic_dev_cmd_firmware_activate(idev, fw_slot);
 179         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 180         mutex_unlock(&ionic->dev_cmd_lock);
 181         if (err) {
 182                 NL_SET_ERR_MSG_MOD(extack, "Failed to start firmware select");
 183                 goto err_out;
 184         }
 185
 186         err = ionic_fw_status_long_wait(ionic, "Selecting",
 187                                         IONIC_FW_SELECT_TIMEOUT,
 188                                         IONIC_FW_ACTIVATE_STATUS,
 189                                         extack);
 190         if (err)
 191                 goto err_out;
 192
 193         netdev_info(netdev, "Firmware update completed\n");
 194
 195 err_out:
 196         if (err)
 197                 devlink_flash_update_status_notify(dl, "Flash failed", NULL, 0, 0);
 198         else
 199                 devlink_flash_update_status_notify(dl, "Flash done", NULL, 0, 0);
 200         return err;
 201 }