iwlwifi: mvm: BT Coex - add debugfs hook to set BT Tx priority

In order to debug the firmware, we need to be able to set
the BT priority of WiFi packets. This priority is set based
on the type of the packet (control frames, EAPOL etc...).
For debugging purposes, allow to override this priority by
a debugfs controlled value.
Enable this feature that needs this priority to be able to
test it.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

5 files changed, 30 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/mvm/coex.c b/drivers/net/wireless/iwlwifi/mvm/coex.c
index 018d75c805ad..c9b320a06070 100644
--- a/drivers/net/wireless/iwlwifi/mvm/coex.c
+++ b/drivers/net/wireless/iwlwifi/mvm/coex.c
@@ -616,6 +616,11 @@ int iwl_send_bt_init_conf(struct iwl_mvm *mvm)
                 bt_cmd->flags |= cpu_to_le32(BT_COEX_CORUNNING);
         }
 
+        if (IWL_MVM_BT_COEX_MPLUT) {
+                bt_cmd->flags |= cpu_to_le32(BT_COEX_MPLUT);
+                bt_cmd->valid_bit_msk = cpu_to_le32(BT_VALID_MULTI_PRIO_LUT);
+        }
+
         if (mvm->cfg->bt_shared_single_ant)
                 memcpy(&bt_cmd->decision_lut, iwl_single_shared_ant,
                        sizeof(iwl_single_shared_ant));
@@ -1215,6 +1220,9 @@ u8 iwl_mvm_bt_coex_tx_prio(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr,
         if (info->band != IEEE80211_BAND_2GHZ)
                 return 0;
 
+        if (unlikely(mvm->bt_tx_prio))
+                return mvm->bt_tx_prio - 1;
+
         /* High prio packet (wrt. BT coex) if it is EAPOL, MCAST or MGMT */
         if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO ||
              is_multicast_ether_addr(hdr->addr1) ||
diff --git a/drivers/net/wireless/iwlwifi/mvm/constants.h b/drivers/net/wireless/iwlwifi/mvm/constants.h
index 37d5f3594c4f..921b177a92b8 100644
--- a/drivers/net/wireless/iwlwifi/mvm/constants.h
+++ b/drivers/net/wireless/iwlwifi/mvm/constants.h
@@ -83,5 +83,6 @@
 #define IWL_MVM_LOWLAT_DUAL_BINDING_MAXDUR      24 /* TU */
 #define IWL_MVM_BT_COEX_SYNC2SCO                1
 #define IWL_MVM_BT_COEX_CORUNNING               1
+#define IWL_MVM_BT_COEX_MPLUT                   1
 
 #endif /* __MVM_CONSTANTS_H */
diff --git a/drivers/net/wireless/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/iwlwifi/mvm/debugfs.c
index cf1fa498e53e..2566fa9913ef 100644
--- a/drivers/net/wireless/iwlwifi/mvm/debugfs.c
+++ b/drivers/net/wireless/iwlwifi/mvm/debugfs.c
@@ -441,6 +441,22 @@ static ssize_t iwl_dbgfs_bt_cmd_read(struct file *file, char __user *user_buf,
         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 }
 
+static ssize_t
+iwl_dbgfs_bt_tx_prio_write(struct iwl_mvm *mvm, char *buf,
+                           size_t count, loff_t *ppos)
+{
+        u32 bt_tx_prio;
+
+        if (sscanf(buf, "%u", &bt_tx_prio) != 1)
+                return -EINVAL;
+        if (bt_tx_prio > 4)
+                return -EINVAL;
+
+        mvm->bt_tx_prio = bt_tx_prio;
+
+        return count;
+}
+
 #define PRINT_STATS_LE32(_str, _val)                                    \
                          pos += scnprintf(buf + pos, bufsz - pos,       \
                                           fmt_table, _str,              \
@@ -1085,6 +1101,7 @@ MVM_DEBUGFS_READ_FILE_OPS(fw_rx_stats);
 MVM_DEBUGFS_READ_FILE_OPS(drv_rx_stats);
 MVM_DEBUGFS_WRITE_FILE_OPS(fw_restart, 10);
 MVM_DEBUGFS_WRITE_FILE_OPS(fw_nmi, 10);
+MVM_DEBUGFS_WRITE_FILE_OPS(bt_tx_prio, 10);
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(scan_ant_rxchain, 8);
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(d0i3_refs, 8);
 
@@ -1126,6 +1143,7 @@ int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir)
         MVM_DEBUGFS_ADD_FILE(drv_rx_stats, mvm->debugfs_dir, S_IRUSR);
         MVM_DEBUGFS_ADD_FILE(fw_restart, mvm->debugfs_dir, S_IWUSR);
         MVM_DEBUGFS_ADD_FILE(fw_nmi, mvm->debugfs_dir, S_IWUSR);
+        MVM_DEBUGFS_ADD_FILE(bt_tx_prio, mvm->debugfs_dir, S_IWUSR);
         MVM_DEBUGFS_ADD_FILE(scan_ant_rxchain, mvm->debugfs_dir,
                              S_IWUSR | S_IRUSR);
         MVM_DEBUGFS_ADD_FILE(prph_reg, mvm->debugfs_dir, S_IWUSR | S_IRUSR);
diff --git a/drivers/net/wireless/iwlwifi/mvm/fw-api-coex.h b/drivers/net/wireless/iwlwifi/mvm/fw-api-coex.h
index 32156d7e2d07..21877e5966a8 100644
--- a/drivers/net/wireless/iwlwifi/mvm/fw-api-coex.h
+++ b/drivers/net/wireless/iwlwifi/mvm/fw-api-coex.h
@@ -78,6 +78,7 @@
  * @BT_COEX_NW:
  * @BT_COEX_SYNC2SCO:
  * @BT_COEX_CORUNNING:
+ * @BT_COEX_MPLUT:
  *
  * The COEX_MODE must be set for each command. Even if it is not changed.
  */
@@ -90,6 +91,7 @@ enum iwl_bt_coex_flags {
         BT_COEX_NW                      = 0x3 << BT_COEX_MODE_POS,
         BT_COEX_SYNC2SCO                = BIT(7),
         BT_COEX_CORUNNING               = BIT(8),
+        BT_COEX_MPLUT                   = BIT(9),
 };
 
 /*
diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h
index cb6dbb140820..d58118241d61 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h
@@ -611,6 +611,7 @@ struct iwl_mvm {
         struct iwl_bt_coex_ci_cmd last_bt_ci_cmd;
         u32 last_ant_isol;
         u8 last_corun_lut;
+        u8 bt_tx_prio;
 
         /* Thermal Throttling and CTkill */
         struct iwl_mvm_tt_mgmt thermal_throttle;