ath10k: refactor p2p noa code

Some files are getting bloated and it makes sense
to split some of the code into separate files. Do
so with the P2P NoA code and prepare it for reuse.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

1 files changed, 124 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath10k/p2p.c b/drivers/net/wireless/ath/ath10k/p2p.c
new file mode 100644
index 000000000000..79d7485e21cd
--- /dev/null
+++ b/drivers/net/wireless/ath/ath10k/p2p.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2015 Qualcomm Atheros, Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "core.h"
+#include "wmi.h"
+#include "p2p.h"
+
+static void ath10k_p2p_noa_ie_fill(u8 *data, size_t len,
+				   const struct wmi_p2p_noa_info *noa)
+{
+	struct ieee80211_p2p_noa_attr *noa_attr;
+	u8  ctwindow_oppps = noa->ctwindow_oppps;
+	u8 ctwindow = ctwindow_oppps >> WMI_P2P_OPPPS_CTWINDOW_OFFSET;
+	bool oppps = !!(ctwindow_oppps & WMI_P2P_OPPPS_ENABLE_BIT);
+	__le16 *noa_attr_len;
+	u16 attr_len;
+	u8 noa_descriptors = noa->num_descriptors;
+	int i;
+
+	/* P2P IE */
+	data[0] = WLAN_EID_VENDOR_SPECIFIC;
+	data[1] = len - 2;
+	data[2] = (WLAN_OUI_WFA >> 16) & 0xff;
+	data[3] = (WLAN_OUI_WFA >> 8) & 0xff;
+	data[4] = (WLAN_OUI_WFA >> 0) & 0xff;
+	data[5] = WLAN_OUI_TYPE_WFA_P2P;
+
+	/* NOA ATTR */
+	data[6] = IEEE80211_P2P_ATTR_ABSENCE_NOTICE;
+	noa_attr_len = (__le16 *)&data[7]; /* 2 bytes */
+	noa_attr = (struct ieee80211_p2p_noa_attr *)&data[9];
+
+	noa_attr->index = noa->index;
+	noa_attr->oppps_ctwindow = ctwindow;
+	if (oppps)
+		noa_attr->oppps_ctwindow |= IEEE80211_P2P_OPPPS_ENABLE_BIT;
+
+	for (i = 0; i < noa_descriptors; i++) {
+		noa_attr->desc[i].count =
+			__le32_to_cpu(noa->descriptors[i].type_count);
+		noa_attr->desc[i].duration = noa->descriptors[i].duration;
+		noa_attr->desc[i].interval = noa->descriptors[i].interval;
+		noa_attr->desc[i].start_time = noa->descriptors[i].start_time;
+	}
+
+	attr_len = 2; /* index + oppps_ctwindow */
+	attr_len += noa_descriptors * sizeof(struct ieee80211_p2p_noa_desc);
+	*noa_attr_len = __cpu_to_le16(attr_len);
+}
+
+static size_t ath10k_p2p_noa_ie_len_compute(const struct wmi_p2p_noa_info *noa)
+{
+	size_t len = 0;
+
+	if (!noa->num_descriptors &&
+	    !(noa->ctwindow_oppps & WMI_P2P_OPPPS_ENABLE_BIT))
+		return 0;
+
+	len += 1 + 1 + 4; /* EID + len + OUI */
+	len += 1 + 2; /* noa attr + attr len */
+	len += 1 + 1; /* index + oppps_ctwindow */
+	len += noa->num_descriptors * sizeof(struct ieee80211_p2p_noa_desc);
+
+	return len;
+}
+
+static void ath10k_p2p_noa_ie_assign(struct ath10k_vif *arvif, void *ie,
+				     size_t len)
+{
+	struct ath10k *ar = arvif->ar;
+
+	lockdep_assert_held(&ar->data_lock);
+
+	kfree(arvif->u.ap.noa_data);
+
+	arvif->u.ap.noa_data = ie;
+	arvif->u.ap.noa_len = len;
+}
+
+static void __ath10k_p2p_noa_update(struct ath10k_vif *arvif,
+				    const struct wmi_p2p_noa_info *noa)
+{
+	struct ath10k *ar = arvif->ar;
+	void *ie;
+	size_t len;
+
+	lockdep_assert_held(&ar->data_lock);
+
+	ath10k_p2p_noa_ie_assign(arvif, NULL, 0);
+
+	len = ath10k_p2p_noa_ie_len_compute(noa);
+	if (!len)
+		return;
+
+	ie = kmalloc(len, GFP_ATOMIC);
+	if (!ie)
+		return;
+
+	ath10k_p2p_noa_ie_fill(ie, len, noa);
+	ath10k_p2p_noa_ie_assign(arvif, ie, len);
+}
+
+void ath10k_p2p_noa_update(struct ath10k_vif *arvif,
+			   const struct wmi_p2p_noa_info *noa)
+{
+	struct ath10k *ar = arvif->ar;
+
+	spin_lock_bh(&ar->data_lock);
+	__ath10k_p2p_noa_update(arvif, noa);
+	spin_unlock_bh(&ar->data_lock);
+}