forked from Minki/linux
orinoco: Provide option to avoid unnecessary fw caching
Make firmware caching on startup optional, and make it default. When the option is not selected and PM_SLEEP is configured, then cache firmware in the suspend pm_notifier. This configuration saves about 64k RAM in normal use, but can lead to a situation where the driver is configured to use a different firmware. Signed-off by: David Kilroy <kilroyd@googlemail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
David Kilroy
John W. Linville
parent
ac7cafd722
commit
39d1ffee57
@ -214,6 +214,21 @@ config HERMES
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configure your card and that /etc/pcmcia/wireless.opts works :
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<http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Tools.html>
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config HERMES_CACHE_FW_ON_INIT
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bool "Cache Hermes firmware on driver initialisation"
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depends on HERMES
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default y
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---help---
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Say Y to cache any firmware required by the Hermes drivers
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on startup. The firmware will remain cached until the
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driver is unloaded. The cache uses 64K of RAM.
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Otherwise load the firmware from userspace as required. In
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this case the driver should be unloaded and restarted
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whenever the firmware is changed.
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If you are not sure, say Y.
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config APPLE_AIRPORT
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tristate "Apple Airport support (built-in)"
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depends on PPC_PMAC && HERMES
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@ -84,6 +84,7 @@
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/firmware.h>
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#include <linux/suspend.h>
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#include <linux/if_arp.h>
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#include <linux/wireless.h>
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#include <linux/ieee80211.h>
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@ -712,6 +713,7 @@ static int orinoco_download(struct orinoco_private *priv)
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return err;
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}
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#if defined(CONFIG_HERMES_CACHE_FW_ON_INIT) || defined(CONFIG_PM_SLEEP)
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static void orinoco_cache_fw(struct orinoco_private *priv, int ap)
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{
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const struct firmware *fw_entry = NULL;
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@ -745,6 +747,10 @@ static void orinoco_uncache_fw(struct orinoco_private *priv)
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priv->cached_pri_fw = NULL;
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priv->cached_fw = NULL;
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}
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#else
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#define orinoco_cache_fw(priv, ap)
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#define orinoco_uncache_fw(priv)
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#endif
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/********************************************************************/
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/* Device methods */
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@ -3099,6 +3105,50 @@ irqreturn_t orinoco_interrupt(int irq, void *dev_id)
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return IRQ_HANDLED;
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}
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/********************************************************************/
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/* Power management */
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/********************************************************************/
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#if defined(CONFIG_PM_SLEEP) && !defined(CONFIG_HERMES_CACHE_FW_ON_INIT)
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static int orinoco_pm_notifier(struct notifier_block *notifier,
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unsigned long pm_event,
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void *unused)
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{
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struct orinoco_private *priv = container_of(notifier,
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struct orinoco_private,
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pm_notifier);
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/* All we need to do is cache the firmware before suspend, and
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* release it when we come out.
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*
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* Only need to do this if we're downloading firmware. */
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if (!priv->do_fw_download)
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return NOTIFY_DONE;
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switch (pm_event) {
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case PM_HIBERNATION_PREPARE:
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case PM_SUSPEND_PREPARE:
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orinoco_cache_fw(priv, 0);
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break;
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case PM_POST_RESTORE:
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/* Restore from hibernation failed. We need to clean
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* up in exactly the same way, so fall through. */
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case PM_POST_HIBERNATION:
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case PM_POST_SUSPEND:
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orinoco_uncache_fw(priv);
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break;
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case PM_RESTORE_PREPARE:
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default:
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break;
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}
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return NOTIFY_DONE;
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}
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#else /* !PM_SLEEP || HERMES_CACHE_FW_ON_INIT */
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#define orinoco_pm_notifier NULL
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#endif
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/********************************************************************/
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/* Initialization */
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/********************************************************************/
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@ -3342,7 +3392,9 @@ static int orinoco_init(struct net_device *dev)
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}
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if (priv->do_fw_download) {
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#ifdef CONFIG_HERMES_CACHE_FW_ON_INIT
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orinoco_cache_fw(priv, 0);
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#endif
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err = orinoco_download(priv);
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if (err)
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@ -3583,6 +3635,10 @@ struct net_device
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priv->cached_pri_fw = NULL;
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priv->cached_fw = NULL;
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/* Register PM notifiers */
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priv->pm_notifier.notifier_call = orinoco_pm_notifier;
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register_pm_notifier(&priv->pm_notifier);
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return dev;
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}
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@ -3595,6 +3651,7 @@ void free_orinocodev(struct net_device *dev)
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* emptying the list */
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tasklet_kill(&priv->rx_tasklet);
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unregister_pm_notifier(&priv->pm_notifier);
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orinoco_uncache_fw(priv);
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priv->wpa_ie_len = 0;
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@ -10,6 +10,7 @@
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#define DRIVER_VERSION "0.15"
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#include <linux/interrupt.h>
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#include <linux/suspend.h>
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#include <linux/netdevice.h>
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#include <linux/wireless.h>
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#include <net/iw_handler.h>
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@ -170,6 +171,8 @@ struct orinoco_private {
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/* Cached in memory firmware to use during ->resume. */
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const struct firmware *cached_pri_fw;
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const struct firmware *cached_fw;
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struct notifier_block pm_notifier;
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};
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#ifdef ORINOCO_DEBUG
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