drivers/net/wireless/intel/iwlwifi/dvm/rxon.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/intel/iwlwifi/dvm/rxon.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/intel/iwlwifi/dvm/rxon.c
Extension
.c
Size
44772 bytes
Lines
1548
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (ctx->vif) {
			ret = iwl_send_rxon_timing(priv, ctx);
			if (ret) {
				IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
				return ret;
			}
			ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging);
		}
	}
	if (ret)
		return ret;

	/*
	 * Un-assoc RXON clears the station table and WEP
	 * keys, so we have to restore those afterwards.
	 */
	iwl_clear_ucode_stations(priv, ctx);
	/* update -- might need P2P now */
	iwl_update_bcast_station(priv, ctx);
	iwl_restore_stations(priv, ctx);
	ret = iwl_restore_default_wep_keys(priv, ctx);
	if (ret) {
		IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
		return ret;
	}

	memcpy(active, &ctx->staging, sizeof(*active));
	return 0;
}

static int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
{
	int ret;
	s8 prev_tx_power;
	bool defer;
	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];

	if (priv->calib_disabled & IWL_TX_POWER_CALIB_DISABLED)
		return 0;

	lockdep_assert_held(&priv->mutex);

	if (priv->tx_power_user_lmt == tx_power && !force)
		return 0;

	if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
		IWL_WARN(priv,
			 "Requested user TXPOWER %d below lower limit %d.\n",
			 tx_power,
			 IWLAGN_TX_POWER_TARGET_POWER_MIN);
		return -EINVAL;
	}

	if (tx_power > DIV_ROUND_UP(priv->nvm_data->max_tx_pwr_half_dbm, 2)) {
		IWL_WARN(priv,
			"Requested user TXPOWER %d above upper limit %d.\n",
			 tx_power, priv->nvm_data->max_tx_pwr_half_dbm);
		return -EINVAL;
	}

	if (!iwl_is_ready_rf(priv))
		return -EIO;

	/* scan complete and commit_rxon use tx_power_next value,
	 * it always need to be updated for newest request */
	priv->tx_power_next = tx_power;

	/* do not set tx power when scanning or channel changing */
	defer = test_bit(STATUS_SCANNING, &priv->status) ||
		memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
	if (defer && !force) {
		IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
		return 0;
	}

	prev_tx_power = priv->tx_power_user_lmt;
	priv->tx_power_user_lmt = tx_power;

	ret = iwlagn_send_tx_power(priv);

	/* if fail to set tx_power, restore the orig. tx power */
	if (ret) {
		priv->tx_power_user_lmt = prev_tx_power;
		priv->tx_power_next = prev_tx_power;
	}
	return ret;
}

static int iwlagn_rxon_connect(struct iwl_priv *priv,
			       struct iwl_rxon_context *ctx)

Annotation

Implementation Notes