1 files changed, 96 insertions, 0 deletions
diff --git a/backport-include/linux/pm_qos.h b/backport-include/linux/pm_qos.h
new file mode 100644
index 0000000..96a600f
--- /dev/null
+++ b/backport-include/linux/pm_qos.h
@@ -0,0 +1,96 @@
+#ifndef _COMPAT_LINUX_PM_QOS_H
+#define _COMPAT_LINUX_PM_QOS_H 1
+
+#include <linux/version.h>
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,25))
+/*
+ * Kernels >= 2.6.25 have pm-qos and its initialized as part of
+ * the bootup process
+ */
+static inline int backport_pm_qos_power_init(void)
+{
+	return 0;
+}
+
+static inline int backport_pm_qos_power_deinit(void)
+{
+	return 0;
+}
+#else
+/*
+ * Backport work for QoS dependencies (kernel/pm_qos_params.c)
+ * pm-qos stuff written by mark gross mgross@linux.intel.com.
+ *
+ * ipw2100 now makes use of:
+ *
+ * pm_qos_add_requirement(),
+ * pm_qos_update_requirement() and
+ * pm_qos_remove_requirement() from it
+ *
+ * mac80211 uses the network latency to determine if to enable or not
+ * dynamic PS. mac80211 also and registers a notifier for when
+ * the latency changes. Since older kernels do no thave pm-qos stuff
+ * we just implement it completley here and register it upon cfg80211
+ * init. I haven't tested ipw2100 on 2.6.24 though.
+ *
+ * This pm-qos implementation is copied verbatim from the kernel
+ * written by mark gross mgross@linux.intel.com. You don't have
+ * to do anythinig to use pm-qos except use the same exported
+ * routines as used in newer kernels. The backport_pm_qos_power_init()
+ * defned below is used by the compat module to initialize pm-qos.
+ */
+int backport_pm_qos_power_init(void);
+int backport_pm_qos_power_deinit(void);
+#endif
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,0))
+#include_next <linux/pm_qos.h>
+#else
+#include <linux/pm_qos_params.h>
+#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,0)) */
+
+#ifndef PM_QOS_DEFAULT_VALUE
+#define PM_QOS_DEFAULT_VALUE -1
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36)
+struct pm_qos_request_list {
+	u32 qos;
+	void *request;
+};
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35))
+
+#define pm_qos_add_request(_req, _class, _value) do {			\
+	(_req)->request = #_req;					\
+	(_req)->qos = _class;						\
+	pm_qos_add_requirement((_class), (_req)->request, (_value));	\
+    } while(0)
+
+#define pm_qos_update_request(_req, _value)				\
+	pm_qos_update_requirement((_req)->qos, (_req)->request, (_value))
+
+#define pm_qos_remove_request(_req)					\
+	pm_qos_remove_requirement((_req)->qos, (_req)->request)
+
+#else
+
+#define pm_qos_add_request(_req, _class, _value) do {			\
+	(_req)->request = pm_qos_add_request((_class), (_value));	\
+    } while (0)
+
+#define pm_qos_update_request(_req, _value)				\
+	pm_qos_update_request((_req)->request, (_value))
+
+#define pm_qos_remove_request(_req)					\
+	pm_qos_remove_request((_req)->request)
+
+#endif /* < 2.6.35 */
+#endif /* < 2.6.36 */
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
+#define pm_qos_request(_qos) pm_qos_requirement(_qos)
+#endif
+
+#endif	/* _COMPAT_LINUX_PM_QOS_H */