liquidio: with embedded f/w, don't reload f/w, issue pf flr at exit

1. Add support for PF FLR when exiting
   (enables CORE_DRV_ACTIVE upon next driver init)
2. Skip some initialization (don't try to load f/w, activate consoles).

Signed-off-by: Rick Farrington <ricardo.farrington@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_main.c b/drivers/net/ethernet/cavium/liquidio/lio_main.c
index 0eea6a2..bd67980 100644 (file)
--- a/drivers/net/ethernet/cavium/liquidio/lio_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_main.c
@@ -1122,6 +1122,33 @@ static bool fw_type_is_none(void)
 }
 
 /**
+ * \brief PCI FLR for each Octeon device.
+ * @param oct octeon device
+ */
+static void octeon_pci_flr(struct octeon_device *oct)
+{
+       int rc;
+
+       pci_save_state(oct->pci_dev);
+
+       pci_cfg_access_lock(oct->pci_dev);
+
+       /* Quiesce the device completely */
+       pci_write_config_word(oct->pci_dev, PCI_COMMAND,
+                             PCI_COMMAND_INTX_DISABLE);
+
+       rc = __pci_reset_function_locked(oct->pci_dev);
+
+       if (rc != 0)
+               dev_err(&oct->pci_dev->dev, "Error %d resetting PCI function %d\n",
+                       rc, oct->pf_num);
+
+       pci_cfg_access_unlock(oct->pci_dev);
+
+       pci_restore_state(oct->pci_dev);
+}
+
+/**
  *\brief Destroy resources associated with octeon device
  * @param pdev PCI device structure
  * @param ent unused
@@ -1269,14 +1296,16 @@ static void octeon_destroy_resources(struct octeon_device *oct)
        case OCT_DEV_PCI_MAP_DONE:
                refcount = octeon_deregister_device(oct);
 
-               if (!fw_type_is_none()) {
-                       /* Soft reset the octeon device before exiting.
-                        * Implementation note: here, we reset the device
-                        * if it is a CN6XXX OR the last CN23XX device.
-                        */
-                       if (OCTEON_CN6XXX(oct) || !refcount)
-                               oct->fn_list.soft_reset(oct);
-               }
+               /* Soft reset the octeon device before exiting.
+                * However, if fw was loaded from card (i.e. autoboot),
+                * perform an FLR instead.
+                * Implementation note: only soft-reset the device
+                * if it is a CN6XXX OR the LAST CN23XX device.
+                */
+               if (fw_type_is_none())
+                       octeon_pci_flr(oct);
+               else if (OCTEON_CN6XXX(oct) || !refcount)
+                       oct->fn_list.soft_reset(oct);
 
                octeon_unmap_pci_barx(oct, 0);
                octeon_unmap_pci_barx(oct, 1);
@@ -1912,11 +1941,6 @@ static int load_firmware(struct octeon_device *oct)
        char fw_name[LIO_MAX_FW_FILENAME_LEN];
        char *tmp_fw_type;
 
-       if (fw_type_is_none()) {
-               dev_info(&oct->pci_dev->dev, "Skipping firmware load\n");
-               return ret;
-       }
-
        if (fw_type[0] == '\0')
                tmp_fw_type = LIO_FW_NAME_TYPE_NIC;
        else
@@ -3900,18 +3924,16 @@ static int octeon_device_init(struct octeon_device *octeon_dev)
        octeon_dev->app_mode = CVM_DRV_INVALID_APP;
 
        if (OCTEON_CN23XX_PF(octeon_dev)) {
-               if (!cn23xx_fw_loaded(octeon_dev)) {
+               if (!cn23xx_fw_loaded(octeon_dev) && !fw_type_is_none()) {
                        fw_loaded = 0;
-                       if (!fw_type_is_none()) {
-                               /* Do a soft reset of the Octeon device. */
-                               if (octeon_dev->fn_list.soft_reset(octeon_dev))
-                                       return 1;
-                               /* things might have changed */
-                               if (!cn23xx_fw_loaded(octeon_dev))
-                                       fw_loaded = 0;
-                               else
-                                       fw_loaded = 1;
-                       }
+                       /* Do a soft reset of the Octeon device. */
+                       if (octeon_dev->fn_list.soft_reset(octeon_dev))
+                               return 1;
+                       /* things might have changed */
+                       if (!cn23xx_fw_loaded(octeon_dev))
+                               fw_loaded = 0;
+                       else
+                               fw_loaded = 1;
                } else {
                        fw_loaded = 1;
                }