mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-10-31 16:18:51 +01:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
593
drivers/net/wireless/ti/wl1251/tx.c
Normal file
593
drivers/net/wireless/ti/wl1251/tx.c
Normal file
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@ -0,0 +1,593 @@
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/*
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* This file is part of wl1251
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*
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* Copyright (c) 1998-2007 Texas Instruments Incorporated
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* Copyright (C) 2008 Nokia Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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||||
* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include "wl1251.h"
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#include "reg.h"
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#include "tx.h"
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#include "ps.h"
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#include "io.h"
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#include "event.h"
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static bool wl1251_tx_double_buffer_busy(struct wl1251 *wl, u32 data_out_count)
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{
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int used, data_in_count;
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data_in_count = wl->data_in_count;
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if (data_in_count < data_out_count)
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/* data_in_count has wrapped */
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data_in_count += TX_STATUS_DATA_OUT_COUNT_MASK + 1;
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used = data_in_count - data_out_count;
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WARN_ON(used < 0);
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WARN_ON(used > DP_TX_PACKET_RING_CHUNK_NUM);
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if (used >= DP_TX_PACKET_RING_CHUNK_NUM)
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return true;
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else
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return false;
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}
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static int wl1251_tx_path_status(struct wl1251 *wl)
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{
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u32 status, addr, data_out_count;
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bool busy;
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addr = wl->data_path->tx_control_addr;
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status = wl1251_mem_read32(wl, addr);
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data_out_count = status & TX_STATUS_DATA_OUT_COUNT_MASK;
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busy = wl1251_tx_double_buffer_busy(wl, data_out_count);
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if (busy)
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return -EBUSY;
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return 0;
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}
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static int wl1251_tx_id(struct wl1251 *wl, struct sk_buff *skb)
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{
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int i;
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for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
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if (wl->tx_frames[i] == NULL) {
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wl->tx_frames[i] = skb;
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return i;
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}
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return -EBUSY;
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}
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static void wl1251_tx_control(struct tx_double_buffer_desc *tx_hdr,
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struct ieee80211_tx_info *control, u16 fc)
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{
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*(u16 *)&tx_hdr->control = 0;
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tx_hdr->control.rate_policy = 0;
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/* 802.11 packets */
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tx_hdr->control.packet_type = 0;
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/* Also disable retry and ACK policy for injected packets */
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if ((control->flags & IEEE80211_TX_CTL_NO_ACK) ||
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(control->flags & IEEE80211_TX_CTL_INJECTED)) {
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tx_hdr->control.rate_policy = 1;
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tx_hdr->control.ack_policy = 1;
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}
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tx_hdr->control.tx_complete = 1;
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if ((fc & IEEE80211_FTYPE_DATA) &&
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((fc & IEEE80211_STYPE_QOS_DATA) ||
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(fc & IEEE80211_STYPE_QOS_NULLFUNC)))
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tx_hdr->control.qos = 1;
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}
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/* RSN + MIC = 8 + 8 = 16 bytes (worst case - AES). */
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#define MAX_MSDU_SECURITY_LENGTH 16
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#define MAX_MPDU_SECURITY_LENGTH 16
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#define WLAN_QOS_HDR_LEN 26
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#define MAX_MPDU_HEADER_AND_SECURITY (MAX_MPDU_SECURITY_LENGTH + \
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WLAN_QOS_HDR_LEN)
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#define HW_BLOCK_SIZE 252
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static void wl1251_tx_frag_block_num(struct tx_double_buffer_desc *tx_hdr)
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{
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u16 payload_len, frag_threshold, mem_blocks;
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u16 num_mpdus, mem_blocks_per_frag;
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frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
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tx_hdr->frag_threshold = cpu_to_le16(frag_threshold);
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payload_len = le16_to_cpu(tx_hdr->length) + MAX_MSDU_SECURITY_LENGTH;
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if (payload_len > frag_threshold) {
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mem_blocks_per_frag =
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((frag_threshold + MAX_MPDU_HEADER_AND_SECURITY) /
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HW_BLOCK_SIZE) + 1;
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num_mpdus = payload_len / frag_threshold;
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mem_blocks = num_mpdus * mem_blocks_per_frag;
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payload_len -= num_mpdus * frag_threshold;
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num_mpdus++;
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} else {
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mem_blocks_per_frag = 0;
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mem_blocks = 0;
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num_mpdus = 1;
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}
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mem_blocks += (payload_len / HW_BLOCK_SIZE) + 1;
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if (num_mpdus > 1)
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mem_blocks += min(num_mpdus, mem_blocks_per_frag);
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tx_hdr->num_mem_blocks = mem_blocks;
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}
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static int wl1251_tx_fill_hdr(struct wl1251 *wl, struct sk_buff *skb,
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struct ieee80211_tx_info *control)
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{
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struct tx_double_buffer_desc *tx_hdr;
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struct ieee80211_rate *rate;
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int id;
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u16 fc;
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if (!skb)
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return -EINVAL;
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id = wl1251_tx_id(wl, skb);
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if (id < 0)
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return id;
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fc = *(u16 *)skb->data;
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tx_hdr = (struct tx_double_buffer_desc *) skb_push(skb,
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sizeof(*tx_hdr));
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tx_hdr->length = cpu_to_le16(skb->len - sizeof(*tx_hdr));
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rate = ieee80211_get_tx_rate(wl->hw, control);
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tx_hdr->rate = cpu_to_le16(rate->hw_value);
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tx_hdr->expiry_time = cpu_to_le32(1 << 16);
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tx_hdr->id = id;
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tx_hdr->xmit_queue = wl1251_tx_get_queue(skb_get_queue_mapping(skb));
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wl1251_tx_control(tx_hdr, control, fc);
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wl1251_tx_frag_block_num(tx_hdr);
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return 0;
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}
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/* We copy the packet to the target */
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static int wl1251_tx_send_packet(struct wl1251 *wl, struct sk_buff *skb,
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struct ieee80211_tx_info *control)
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{
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struct tx_double_buffer_desc *tx_hdr;
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int len;
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u32 addr;
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if (!skb)
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return -EINVAL;
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tx_hdr = (struct tx_double_buffer_desc *) skb->data;
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if (control->control.hw_key &&
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control->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) {
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int hdrlen;
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__le16 fc;
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u16 length;
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u8 *pos;
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fc = *(__le16 *)(skb->data + sizeof(*tx_hdr));
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length = le16_to_cpu(tx_hdr->length) + WL1251_TKIP_IV_SPACE;
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tx_hdr->length = cpu_to_le16(length);
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hdrlen = ieee80211_hdrlen(fc);
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pos = skb_push(skb, WL1251_TKIP_IV_SPACE);
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memmove(pos, pos + WL1251_TKIP_IV_SPACE,
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sizeof(*tx_hdr) + hdrlen);
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}
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/* Revisit. This is a workaround for getting non-aligned packets.
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This happens at least with EAPOL packets from the user space.
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Our DMA requires packets to be aligned on a 4-byte boundary.
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*/
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if (unlikely((long)skb->data & 0x03)) {
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int offset = (4 - (long)skb->data) & 0x03;
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wl1251_debug(DEBUG_TX, "skb offset %d", offset);
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/* check whether the current skb can be used */
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if (skb_cloned(skb) || (skb_tailroom(skb) < offset)) {
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struct sk_buff *newskb = skb_copy_expand(skb, 0, 3,
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GFP_KERNEL);
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if (unlikely(newskb == NULL)) {
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wl1251_error("Can't allocate skb!");
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return -EINVAL;
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}
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tx_hdr = (struct tx_double_buffer_desc *) newskb->data;
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dev_kfree_skb_any(skb);
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wl->tx_frames[tx_hdr->id] = skb = newskb;
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offset = (4 - (long)skb->data) & 0x03;
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wl1251_debug(DEBUG_TX, "new skb offset %d", offset);
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}
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/* align the buffer on a 4-byte boundary */
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if (offset) {
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unsigned char *src = skb->data;
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skb_reserve(skb, offset);
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memmove(skb->data, src, skb->len);
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tx_hdr = (struct tx_double_buffer_desc *) skb->data;
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}
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}
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/* Our skb->data at this point includes the HW header */
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len = WL1251_TX_ALIGN(skb->len);
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if (wl->data_in_count & 0x1)
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addr = wl->data_path->tx_packet_ring_addr +
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wl->data_path->tx_packet_ring_chunk_size;
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else
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addr = wl->data_path->tx_packet_ring_addr;
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wl1251_mem_write(wl, addr, skb->data, len);
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wl1251_debug(DEBUG_TX, "tx id %u skb 0x%p payload %u rate 0x%x "
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"queue %d", tx_hdr->id, skb, tx_hdr->length,
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tx_hdr->rate, tx_hdr->xmit_queue);
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return 0;
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}
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static void wl1251_tx_trigger(struct wl1251 *wl)
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{
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u32 data, addr;
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if (wl->data_in_count & 0x1) {
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addr = ACX_REG_INTERRUPT_TRIG_H;
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data = INTR_TRIG_TX_PROC1;
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} else {
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addr = ACX_REG_INTERRUPT_TRIG;
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data = INTR_TRIG_TX_PROC0;
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}
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wl1251_reg_write32(wl, addr, data);
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/* Bumping data in */
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wl->data_in_count = (wl->data_in_count + 1) &
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TX_STATUS_DATA_OUT_COUNT_MASK;
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}
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static void enable_tx_for_packet_injection(struct wl1251 *wl)
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{
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int ret;
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ret = wl1251_cmd_join(wl, BSS_TYPE_STA_BSS, wl->channel,
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wl->beacon_int, wl->dtim_period);
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if (ret < 0) {
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wl1251_warning("join failed");
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return;
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}
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ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
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||||
if (ret < 0) {
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||||
wl1251_warning("join timeout");
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||||
return;
|
||||
}
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||||
|
||||
wl->joined = true;
|
||||
}
|
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|
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/* caller must hold wl->mutex */
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static int wl1251_tx_frame(struct wl1251 *wl, struct sk_buff *skb)
|
||||
{
|
||||
struct ieee80211_tx_info *info;
|
||||
int ret = 0;
|
||||
u8 idx;
|
||||
|
||||
info = IEEE80211_SKB_CB(skb);
|
||||
|
||||
if (info->control.hw_key) {
|
||||
if (unlikely(wl->monitor_present))
|
||||
return -EINVAL;
|
||||
|
||||
idx = info->control.hw_key->hw_key_idx;
|
||||
if (unlikely(wl->default_key != idx)) {
|
||||
ret = wl1251_acx_default_key(wl, idx);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
/* Enable tx path in monitor mode for packet injection */
|
||||
if ((wl->vif == NULL) && !wl->joined)
|
||||
enable_tx_for_packet_injection(wl);
|
||||
|
||||
ret = wl1251_tx_path_status(wl);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = wl1251_tx_fill_hdr(wl, skb, info);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = wl1251_tx_send_packet(wl, skb, info);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
wl1251_tx_trigger(wl);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
void wl1251_tx_work(struct work_struct *work)
|
||||
{
|
||||
struct wl1251 *wl = container_of(work, struct wl1251, tx_work);
|
||||
struct sk_buff *skb;
|
||||
bool woken_up = false;
|
||||
int ret;
|
||||
|
||||
mutex_lock(&wl->mutex);
|
||||
|
||||
if (unlikely(wl->state == WL1251_STATE_OFF))
|
||||
goto out;
|
||||
|
||||
while ((skb = skb_dequeue(&wl->tx_queue))) {
|
||||
if (!woken_up) {
|
||||
ret = wl1251_ps_elp_wakeup(wl);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
woken_up = true;
|
||||
}
|
||||
|
||||
ret = wl1251_tx_frame(wl, skb);
|
||||
if (ret == -EBUSY) {
|
||||
skb_queue_head(&wl->tx_queue, skb);
|
||||
goto out;
|
||||
} else if (ret < 0) {
|
||||
dev_kfree_skb(skb);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
out:
|
||||
if (woken_up)
|
||||
wl1251_ps_elp_sleep(wl);
|
||||
|
||||
mutex_unlock(&wl->mutex);
|
||||
}
|
||||
|
||||
static const char *wl1251_tx_parse_status(u8 status)
|
||||
{
|
||||
/* 8 bit status field, one character per bit plus null */
|
||||
static char buf[9];
|
||||
int i = 0;
|
||||
|
||||
memset(buf, 0, sizeof(buf));
|
||||
|
||||
if (status & TX_DMA_ERROR)
|
||||
buf[i++] = 'm';
|
||||
if (status & TX_DISABLED)
|
||||
buf[i++] = 'd';
|
||||
if (status & TX_RETRY_EXCEEDED)
|
||||
buf[i++] = 'r';
|
||||
if (status & TX_TIMEOUT)
|
||||
buf[i++] = 't';
|
||||
if (status & TX_KEY_NOT_FOUND)
|
||||
buf[i++] = 'k';
|
||||
if (status & TX_ENCRYPT_FAIL)
|
||||
buf[i++] = 'e';
|
||||
if (status & TX_UNAVAILABLE_PRIORITY)
|
||||
buf[i++] = 'p';
|
||||
|
||||
/* bit 0 is unused apparently */
|
||||
|
||||
return buf;
|
||||
}
|
||||
|
||||
static void wl1251_tx_packet_cb(struct wl1251 *wl,
|
||||
struct tx_result *result)
|
||||
{
|
||||
struct ieee80211_tx_info *info;
|
||||
struct sk_buff *skb;
|
||||
int hdrlen;
|
||||
u8 *frame;
|
||||
|
||||
skb = wl->tx_frames[result->id];
|
||||
if (skb == NULL) {
|
||||
wl1251_error("SKB for packet %d is NULL", result->id);
|
||||
return;
|
||||
}
|
||||
|
||||
info = IEEE80211_SKB_CB(skb);
|
||||
|
||||
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
|
||||
!(info->flags & IEEE80211_TX_CTL_INJECTED) &&
|
||||
(result->status == TX_SUCCESS))
|
||||
info->flags |= IEEE80211_TX_STAT_ACK;
|
||||
|
||||
info->status.rates[0].count = result->ack_failures + 1;
|
||||
wl->stats.retry_count += result->ack_failures;
|
||||
|
||||
/*
|
||||
* We have to remove our private TX header before pushing
|
||||
* the skb back to mac80211.
|
||||
*/
|
||||
frame = skb_pull(skb, sizeof(struct tx_double_buffer_desc));
|
||||
if (info->control.hw_key &&
|
||||
info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) {
|
||||
hdrlen = ieee80211_get_hdrlen_from_skb(skb);
|
||||
memmove(frame + WL1251_TKIP_IV_SPACE, frame, hdrlen);
|
||||
skb_pull(skb, WL1251_TKIP_IV_SPACE);
|
||||
}
|
||||
|
||||
wl1251_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x"
|
||||
" status 0x%x (%s)",
|
||||
result->id, skb, result->ack_failures, result->rate,
|
||||
result->status, wl1251_tx_parse_status(result->status));
|
||||
|
||||
|
||||
ieee80211_tx_status(wl->hw, skb);
|
||||
|
||||
wl->tx_frames[result->id] = NULL;
|
||||
}
|
||||
|
||||
/* Called upon reception of a TX complete interrupt */
|
||||
void wl1251_tx_complete(struct wl1251 *wl)
|
||||
{
|
||||
int i, result_index, num_complete = 0, queue_len;
|
||||
struct tx_result result[FW_TX_CMPLT_BLOCK_SIZE], *result_ptr;
|
||||
unsigned long flags;
|
||||
|
||||
if (unlikely(wl->state != WL1251_STATE_ON))
|
||||
return;
|
||||
|
||||
/* First we read the result */
|
||||
wl1251_mem_read(wl, wl->data_path->tx_complete_addr,
|
||||
result, sizeof(result));
|
||||
|
||||
result_index = wl->next_tx_complete;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(result); i++) {
|
||||
result_ptr = &result[result_index];
|
||||
|
||||
if (result_ptr->done_1 == 1 &&
|
||||
result_ptr->done_2 == 1) {
|
||||
wl1251_tx_packet_cb(wl, result_ptr);
|
||||
|
||||
result_ptr->done_1 = 0;
|
||||
result_ptr->done_2 = 0;
|
||||
|
||||
result_index = (result_index + 1) &
|
||||
(FW_TX_CMPLT_BLOCK_SIZE - 1);
|
||||
num_complete++;
|
||||
} else {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
queue_len = skb_queue_len(&wl->tx_queue);
|
||||
|
||||
if ((num_complete > 0) && (queue_len > 0)) {
|
||||
/* firmware buffer has space, reschedule tx_work */
|
||||
wl1251_debug(DEBUG_TX, "tx_complete: reschedule tx_work");
|
||||
ieee80211_queue_work(wl->hw, &wl->tx_work);
|
||||
}
|
||||
|
||||
if (wl->tx_queue_stopped &&
|
||||
queue_len <= WL1251_TX_QUEUE_LOW_WATERMARK) {
|
||||
/* tx_queue has space, restart queues */
|
||||
wl1251_debug(DEBUG_TX, "tx_complete: waking queues");
|
||||
spin_lock_irqsave(&wl->wl_lock, flags);
|
||||
ieee80211_wake_queues(wl->hw);
|
||||
wl->tx_queue_stopped = false;
|
||||
spin_unlock_irqrestore(&wl->wl_lock, flags);
|
||||
}
|
||||
|
||||
/* Every completed frame needs to be acknowledged */
|
||||
if (num_complete) {
|
||||
/*
|
||||
* If we've wrapped, we have to clear
|
||||
* the results in 2 steps.
|
||||
*/
|
||||
if (result_index > wl->next_tx_complete) {
|
||||
/* Only 1 write is needed */
|
||||
wl1251_mem_write(wl,
|
||||
wl->data_path->tx_complete_addr +
|
||||
(wl->next_tx_complete *
|
||||
sizeof(struct tx_result)),
|
||||
&result[wl->next_tx_complete],
|
||||
num_complete *
|
||||
sizeof(struct tx_result));
|
||||
|
||||
|
||||
} else if (result_index < wl->next_tx_complete) {
|
||||
/* 2 writes are needed */
|
||||
wl1251_mem_write(wl,
|
||||
wl->data_path->tx_complete_addr +
|
||||
(wl->next_tx_complete *
|
||||
sizeof(struct tx_result)),
|
||||
&result[wl->next_tx_complete],
|
||||
(FW_TX_CMPLT_BLOCK_SIZE -
|
||||
wl->next_tx_complete) *
|
||||
sizeof(struct tx_result));
|
||||
|
||||
wl1251_mem_write(wl,
|
||||
wl->data_path->tx_complete_addr,
|
||||
result,
|
||||
(num_complete -
|
||||
FW_TX_CMPLT_BLOCK_SIZE +
|
||||
wl->next_tx_complete) *
|
||||
sizeof(struct tx_result));
|
||||
|
||||
} else {
|
||||
/* We have to write the whole array */
|
||||
wl1251_mem_write(wl,
|
||||
wl->data_path->tx_complete_addr,
|
||||
result,
|
||||
FW_TX_CMPLT_BLOCK_SIZE *
|
||||
sizeof(struct tx_result));
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
wl->next_tx_complete = result_index;
|
||||
}
|
||||
|
||||
/* caller must hold wl->mutex */
|
||||
void wl1251_tx_flush(struct wl1251 *wl)
|
||||
{
|
||||
int i;
|
||||
struct sk_buff *skb;
|
||||
struct ieee80211_tx_info *info;
|
||||
|
||||
/* TX failure */
|
||||
/* control->flags = 0; FIXME */
|
||||
|
||||
while ((skb = skb_dequeue(&wl->tx_queue))) {
|
||||
info = IEEE80211_SKB_CB(skb);
|
||||
|
||||
wl1251_debug(DEBUG_TX, "flushing skb 0x%p", skb);
|
||||
|
||||
if (!(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS))
|
||||
continue;
|
||||
|
||||
ieee80211_tx_status(wl->hw, skb);
|
||||
}
|
||||
|
||||
for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
|
||||
if (wl->tx_frames[i] != NULL) {
|
||||
skb = wl->tx_frames[i];
|
||||
info = IEEE80211_SKB_CB(skb);
|
||||
|
||||
if (!(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS))
|
||||
continue;
|
||||
|
||||
ieee80211_tx_status(wl->hw, skb);
|
||||
wl->tx_frames[i] = NULL;
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue