diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn-rx.c | 20 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-testmode.c | 32 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-testmode.h | 13 |
3 files changed, 56 insertions, 9 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rx.c b/drivers/net/wireless/iwlwifi/iwl-agn-rx.c index e504675f263..8e7cdfaf10c 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-rx.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-rx.c @@ -1152,6 +1152,8 @@ int iwl_rx_dispatch(struct iwl_op_mode *op_mode, struct iwl_rx_cmd_buffer *rxb, { struct iwl_rx_packet *pkt = rxb_addr(rxb); struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode); + void (*pre_rx_handler)(struct iwl_priv *, + struct iwl_rx_cmd_buffer *); int err = 0; /* @@ -1161,10 +1163,20 @@ int iwl_rx_dispatch(struct iwl_op_mode *op_mode, struct iwl_rx_cmd_buffer *rxb, */ iwl_notification_wait_notify(&priv->notif_wait, pkt); - if (priv->pre_rx_handler && - priv->ucode_owner == IWL_OWNERSHIP_TM) - priv->pre_rx_handler(priv, rxb); - else { + /* RX data may be forwarded to userspace (using pre_rx_handler) in one + * of two cases: the first, that the user owns the uCode through + * testmode - in such case the pre_rx_handler is set and no further + * processing takes place. The other case is when the user want to + * monitor the rx w/o affecting the regular flow - the pre_rx_handler + * will be set but the ownership flag != IWL_OWNERSHIP_TM and the flow + * continues. + * We need to use ACCESS_ONCE to prevent a case where the handler + * changes between the check and the call. + */ + pre_rx_handler = ACCESS_ONCE(priv->pre_rx_handler); + if (pre_rx_handler) + pre_rx_handler(priv, rxb); + if (priv->ucode_owner != IWL_OWNERSHIP_TM) { /* Based on type of command response or notification, * handle those that need handling via function in * rx_handlers table. See iwl_setup_rx_handlers() */ diff --git a/drivers/net/wireless/iwlwifi/iwl-testmode.c b/drivers/net/wireless/iwlwifi/iwl-testmode.c index 1d732092ebe..b8044bcd504 100644 --- a/drivers/net/wireless/iwlwifi/iwl-testmode.c +++ b/drivers/net/wireless/iwlwifi/iwl-testmode.c @@ -125,6 +125,8 @@ struct nla_policy iwl_testmode_gnl_msg_policy[IWL_TM_ATTR_MAX] = { [IWL_TM_ATTR_FW_TYPE] = { .type = NLA_U32, }, [IWL_TM_ATTR_FW_INST_SIZE] = { .type = NLA_U32, }, [IWL_TM_ATTR_FW_DATA_SIZE] = { .type = NLA_U32, }, + + [IWL_TM_ATTR_ENABLE_NOTIFICATION] = {.type = NLA_FLAG, }, }; /* @@ -194,7 +196,7 @@ nla_put_failure: void iwl_testmode_init(struct iwl_priv *priv) { - priv->pre_rx_handler = iwl_testmode_ucode_rx_pkt; + priv->pre_rx_handler = NULL; priv->testmode_trace.trace_enabled = false; priv->testmode_mem.read_in_progress = false; } @@ -770,9 +772,13 @@ static int iwl_testmode_ownership(struct ieee80211_hw *hw, struct nlattr **tb) } owner = nla_get_u8(tb[IWL_TM_ATTR_UCODE_OWNER]); - if ((owner == IWL_OWNERSHIP_DRIVER) || (owner == IWL_OWNERSHIP_TM)) + if (owner == IWL_OWNERSHIP_DRIVER) { priv->ucode_owner = owner; - else { + priv->pre_rx_handler = NULL; + } else if (owner == IWL_OWNERSHIP_TM) { + priv->pre_rx_handler = iwl_testmode_ucode_rx_pkt; + priv->ucode_owner = owner; + } else { IWL_ERR(priv, "Invalid owner\n"); return -EINVAL; } @@ -937,6 +943,20 @@ static int iwl_testmode_buffer_dump(struct ieee80211_hw *hw, return -ENOBUFS; } +static int iwl_testmode_notifications(struct ieee80211_hw *hw, + struct nlattr **tb) +{ + struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); + bool enable; + + enable = nla_get_flag(tb[IWL_TM_ATTR_ENABLE_NOTIFICATION]); + if (enable) + priv->pre_rx_handler = iwl_testmode_ucode_rx_pkt; + else + priv->pre_rx_handler = NULL; + return 0; +} + /* The testmode gnl message handler that takes the gnl message from the * user space and parses it per the policy iwl_testmode_gnl_msg_policy, then @@ -1022,6 +1042,12 @@ int iwlagn_mac_testmode_cmd(struct ieee80211_hw *hw, void *data, int len) result = iwl_testmode_indirect_mem(hw, tb); break; + case IWL_TM_CMD_APP2DEV_NOTIFICATIONS: + IWL_DEBUG_INFO(priv, "testmode notifications cmd " + "to driver\n"); + result = iwl_testmode_notifications(hw, tb); + break; + default: IWL_ERR(priv, "Unknown testmode command\n"); result = -ENOSYS; diff --git a/drivers/net/wireless/iwlwifi/iwl-testmode.h b/drivers/net/wireless/iwlwifi/iwl-testmode.h index 69b2e80f407..6ba211b0942 100644 --- a/drivers/net/wireless/iwlwifi/iwl-testmode.h +++ b/drivers/net/wireless/iwlwifi/iwl-testmode.h @@ -122,6 +122,9 @@ * Fore reading, a READ command is sent from the userspace and the data * is returned when the user calls a DUMP command. * For writing, only a WRITE command is used. + * @IWL_TM_CMD_APP2DEV_NOTIFICATIONS: + * Command to enable/disable notifications (currently RX packets) from the + * driver to userspace. */ enum iwl_tm_cmd_t { IWL_TM_CMD_APP2DEV_UCODE = 1, @@ -152,7 +155,8 @@ enum iwl_tm_cmd_t { IWL_TM_CMD_APP2DEV_INDIRECT_BUFFER_READ = 26, IWL_TM_CMD_APP2DEV_INDIRECT_BUFFER_DUMP = 27, IWL_TM_CMD_APP2DEV_INDIRECT_BUFFER_WRITE = 28, - IWL_TM_CMD_MAX = 29, + IWL_TM_CMD_APP2DEV_NOTIFICATIONS = 29, + IWL_TM_CMD_MAX = 30, }; /* @@ -256,6 +260,10 @@ enum iwl_tm_cmd_t { * When IWL_TM_ATTR_COMMAND is IWL_TM_CMD_APP2DEV_UCODE this flag * indicates that the user wants to receive the response of the command * in a reply SKB. If it's not present, the response is not returned. + * @IWL_TM_ATTR_ENABLE_NOTIFICATIONS: + * When IWL_TM_ATTR_COMMAND is IWL_TM_CMD_APP2DEV_NOTIFICATIONS, this + * flag enables (if present) or disables (if not) the forwarding + * to userspace. */ enum iwl_tm_attr_t { IWL_TM_ATTR_NOT_APPLICABLE = 0, @@ -282,7 +290,8 @@ enum iwl_tm_attr_t { IWL_TM_ATTR_FW_INST_SIZE = 21, IWL_TM_ATTR_FW_DATA_SIZE = 22, IWL_TM_ATTR_UCODE_CMD_SKB = 23, - IWL_TM_ATTR_MAX = 24, + IWL_TM_ATTR_ENABLE_NOTIFICATION = 24, + IWL_TM_ATTR_MAX = 25, }; /* uCode trace buffer */ |