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linux-999.20-mt7601u-support.patch
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linux-999.20-mt7601u-support.patch
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From 5d2b422d7f7d495c0710c17b195351f9b7be5f63 Mon Sep 17 00:00:00 2001
From: Robert Nelson <robertcnelson@gmail.com>
Date: Mon, 20 Jul 2015 10:48:10 -0500
Subject: [PATCH] backport: mediatek: mt7601u: from v4.2-rc3
Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
---
drivers/net/wireless/Kconfig | 1 +
drivers/net/wireless/Makefile | 2 +
drivers/net/wireless/mediatek/Kconfig | 10 +
drivers/net/wireless/mediatek/Makefile | 1 +
drivers/net/wireless/mediatek/mt7601u/Kconfig | 6 +
drivers/net/wireless/mediatek/mt7601u/Makefile | 9 +
drivers/net/wireless/mediatek/mt7601u/core.c | 78 ++
drivers/net/wireless/mediatek/mt7601u/debugfs.c | 172 +++
drivers/net/wireless/mediatek/mt7601u/dma.c | 505 ++++++++
drivers/net/wireless/mediatek/mt7601u/dma.h | 127 ++
drivers/net/wireless/mediatek/mt7601u/eeprom.c | 418 +++++++
drivers/net/wireless/mediatek/mt7601u/eeprom.h | 151 +++
drivers/net/wireless/mediatek/mt7601u/init.c | 628 ++++++++++
drivers/net/wireless/mediatek/mt7601u/initvals.h | 164 +++
.../net/wireless/mediatek/mt7601u/initvals_phy.h | 291 +++++
drivers/net/wireless/mediatek/mt7601u/mac.c | 573 +++++++++
drivers/net/wireless/mediatek/mt7601u/mac.h | 178 +++
drivers/net/wireless/mediatek/mt7601u/main.c | 413 +++++++
drivers/net/wireless/mediatek/mt7601u/mcu.c | 534 +++++++++
drivers/net/wireless/mediatek/mt7601u/mcu.h | 94 ++
drivers/net/wireless/mediatek/mt7601u/mt7601u.h | 390 ++++++
drivers/net/wireless/mediatek/mt7601u/phy.c | 1251 ++++++++++++++++++++
drivers/net/wireless/mediatek/mt7601u/regs.h | 636 ++++++++++
drivers/net/wireless/mediatek/mt7601u/trace.c | 21 +
drivers/net/wireless/mediatek/mt7601u/trace.h | 400 +++++++
drivers/net/wireless/mediatek/mt7601u/tx.c | 319 +++++
drivers/net/wireless/mediatek/mt7601u/usb.c | 367 ++++++
drivers/net/wireless/mediatek/mt7601u/usb.h | 77 ++
drivers/net/wireless/mediatek/mt7601u/util.c | 42 +
drivers/net/wireless/mediatek/mt7601u/util.h | 77 ++
30 files changed, 7935 insertions(+)
create mode 100644 drivers/net/wireless/mediatek/Kconfig
create mode 100644 drivers/net/wireless/mediatek/Makefile
create mode 100644 drivers/net/wireless/mediatek/mt7601u/Kconfig
create mode 100644 drivers/net/wireless/mediatek/mt7601u/Makefile
create mode 100644 drivers/net/wireless/mediatek/mt7601u/core.c
create mode 100644 drivers/net/wireless/mediatek/mt7601u/debugfs.c
create mode 100644 drivers/net/wireless/mediatek/mt7601u/dma.c
create mode 100644 drivers/net/wireless/mediatek/mt7601u/dma.h
create mode 100644 drivers/net/wireless/mediatek/mt7601u/eeprom.c
create mode 100644 drivers/net/wireless/mediatek/mt7601u/eeprom.h
create mode 100644 drivers/net/wireless/mediatek/mt7601u/init.c
create mode 100644 drivers/net/wireless/mediatek/mt7601u/initvals.h
create mode 100644 drivers/net/wireless/mediatek/mt7601u/initvals_phy.h
create mode 100644 drivers/net/wireless/mediatek/mt7601u/mac.c
create mode 100644 drivers/net/wireless/mediatek/mt7601u/mac.h
create mode 100644 drivers/net/wireless/mediatek/mt7601u/main.c
create mode 100644 drivers/net/wireless/mediatek/mt7601u/mcu.c
create mode 100644 drivers/net/wireless/mediatek/mt7601u/mcu.h
create mode 100644 drivers/net/wireless/mediatek/mt7601u/mt7601u.h
create mode 100644 drivers/net/wireless/mediatek/mt7601u/phy.c
create mode 100644 drivers/net/wireless/mediatek/mt7601u/regs.h
create mode 100644 drivers/net/wireless/mediatek/mt7601u/trace.c
create mode 100644 drivers/net/wireless/mediatek/mt7601u/trace.h
create mode 100644 drivers/net/wireless/mediatek/mt7601u/tx.c
create mode 100644 drivers/net/wireless/mediatek/mt7601u/usb.c
create mode 100644 drivers/net/wireless/mediatek/mt7601u/usb.h
create mode 100644 drivers/net/wireless/mediatek/mt7601u/util.c
create mode 100644 drivers/net/wireless/mediatek/mt7601u/util.h
diff --git a/drivers/net/wireless/Kconfig b/drivers/net/wireless/Kconfig
index ea4d54f..8e0a4bb 100644
--- a/drivers/net/wireless/Kconfig
+++ b/drivers/net/wireless/Kconfig
@@ -277,6 +277,7 @@ source "drivers/net/wireless/libertas/Kconfig"
source "drivers/net/wireless/orinoco/Kconfig"
source "drivers/net/wireless/p54/Kconfig"
source "drivers/net/wireless/rt2x00/Kconfig"
+source "drivers/net/wireless/mediatek/Kconfig"
source "drivers/net/wireless/rtlwifi/Kconfig"
source "drivers/net/wireless/ti/Kconfig"
source "drivers/net/wireless/zd1211rw/Kconfig"
diff --git a/drivers/net/wireless/Makefile b/drivers/net/wireless/Makefile
index 2971041..8e007e3 100644
--- a/drivers/net/wireless/Makefile
+++ b/drivers/net/wireless/Makefile
@@ -46,6 +46,8 @@ obj-$(CONFIG_IWLWIFI) += iwlwifi/
obj-$(CONFIG_IWLEGACY) += iwlegacy/
obj-$(CONFIG_RT2X00) += rt2x00/
+obj-$(CONFIG_WL_MEDIATEK) += mediatek/
+
obj-$(CONFIG_P54_COMMON) += p54/
obj-$(CONFIG_ATH_CARDS) += ath/
diff --git a/drivers/net/wireless/mediatek/Kconfig b/drivers/net/wireless/mediatek/Kconfig
new file mode 100644
index 0000000..cba300c
--- /dev/null
+++ b/drivers/net/wireless/mediatek/Kconfig
@@ -0,0 +1,10 @@
+menuconfig WL_MEDIATEK
+ bool "Mediatek Wireless LAN support"
+ ---help---
+ Enable community drivers for MediaTek WiFi devices.
+ Those drivers make use of the Linux mac80211 stack.
+
+
+if WL_MEDIATEK
+source "drivers/net/wireless/mediatek/mt7601u/Kconfig"
+endif # WL_MEDIATEK
diff --git a/drivers/net/wireless/mediatek/Makefile b/drivers/net/wireless/mediatek/Makefile
new file mode 100644
index 0000000..9d5f182
--- /dev/null
+++ b/drivers/net/wireless/mediatek/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_MT7601U) += mt7601u/
diff --git a/drivers/net/wireless/mediatek/mt7601u/Kconfig b/drivers/net/wireless/mediatek/mt7601u/Kconfig
new file mode 100644
index 0000000..f46bed9
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt7601u/Kconfig
@@ -0,0 +1,6 @@
+config MT7601U
+ tristate "MediaTek MT7601U (USB) support"
+ depends on MAC80211
+ depends on USB
+ ---help---
+ This adds support for MT7601U-based wireless USB dongles.
diff --git a/drivers/net/wireless/mediatek/mt7601u/Makefile b/drivers/net/wireless/mediatek/mt7601u/Makefile
new file mode 100644
index 0000000..ea9ed8a
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt7601u/Makefile
@@ -0,0 +1,9 @@
+ccflags-y += -D__CHECK_ENDIAN__
+
+obj-$(CONFIG_MT7601U) += mt7601u.o
+
+mt7601u-objs = \
+ usb.o init.o main.o mcu.o trace.o dma.o core.o eeprom.o phy.o \
+ mac.o util.o debugfs.o tx.o
+
+CFLAGS_trace.o := -I$(src)
diff --git a/drivers/net/wireless/mediatek/mt7601u/core.c b/drivers/net/wireless/mediatek/mt7601u/core.c
new file mode 100644
index 0000000..0aabd79
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt7601u/core.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include "mt7601u.h"
+
+int mt7601u_wait_asic_ready(struct mt7601u_dev *dev)
+{
+ int i = 100;
+ u32 val;
+
+ do {
+ if (test_bit(MT7601U_STATE_REMOVED, &dev->state))
+ return -EIO;
+
+ val = mt7601u_rr(dev, MT_MAC_CSR0);
+ if (val && ~val)
+ return 0;
+
+ udelay(10);
+ } while (i--);
+
+ return -EIO;
+}
+
+bool mt76_poll(struct mt7601u_dev *dev, u32 offset, u32 mask, u32 val,
+ int timeout)
+{
+ u32 cur;
+
+ timeout /= 10;
+ do {
+ if (test_bit(MT7601U_STATE_REMOVED, &dev->state))
+ return false;
+
+ cur = mt7601u_rr(dev, offset) & mask;
+ if (cur == val)
+ return true;
+
+ udelay(10);
+ } while (timeout-- > 0);
+
+ dev_err(dev->dev, "Error: Time out with reg %08x\n", offset);
+
+ return false;
+}
+
+bool mt76_poll_msec(struct mt7601u_dev *dev, u32 offset, u32 mask, u32 val,
+ int timeout)
+{
+ u32 cur;
+
+ timeout /= 10;
+ do {
+ if (test_bit(MT7601U_STATE_REMOVED, &dev->state))
+ return false;
+
+ cur = mt7601u_rr(dev, offset) & mask;
+ if (cur == val)
+ return true;
+
+ msleep(10);
+ } while (timeout-- > 0);
+
+ dev_err(dev->dev, "Error: Time out with reg %08x\n", offset);
+
+ return false;
+}
diff --git a/drivers/net/wireless/mediatek/mt7601u/debugfs.c b/drivers/net/wireless/mediatek/mt7601u/debugfs.c
new file mode 100644
index 0000000..fc008475
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt7601u/debugfs.c
@@ -0,0 +1,172 @@
+/*
+ * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/debugfs.h>
+
+#include "mt7601u.h"
+#include "eeprom.h"
+
+static int
+mt76_reg_set(void *data, u64 val)
+{
+ struct mt7601u_dev *dev = data;
+
+ mt76_wr(dev, dev->debugfs_reg, val);
+ return 0;
+}
+
+static int
+mt76_reg_get(void *data, u64 *val)
+{
+ struct mt7601u_dev *dev = data;
+
+ *val = mt76_rr(dev, dev->debugfs_reg);
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(fops_regval, mt76_reg_get, mt76_reg_set, "0x%08llx\n");
+
+static int
+mt7601u_ampdu_stat_read(struct seq_file *file, void *data)
+{
+ struct mt7601u_dev *dev = file->private;
+ int i, j;
+
+#define stat_printf(grp, off, name) \
+ seq_printf(file, #name ":\t%llu\n", dev->stats.grp[off])
+
+ stat_printf(rx_stat, 0, rx_crc_err);
+ stat_printf(rx_stat, 1, rx_phy_err);
+ stat_printf(rx_stat, 2, rx_false_cca);
+ stat_printf(rx_stat, 3, rx_plcp_err);
+ stat_printf(rx_stat, 4, rx_fifo_overflow);
+ stat_printf(rx_stat, 5, rx_duplicate);
+
+ stat_printf(tx_stat, 0, tx_fail_cnt);
+ stat_printf(tx_stat, 1, tx_bcn_cnt);
+ stat_printf(tx_stat, 2, tx_success);
+ stat_printf(tx_stat, 3, tx_retransmit);
+ stat_printf(tx_stat, 4, tx_zero_len);
+ stat_printf(tx_stat, 5, tx_underflow);
+
+ stat_printf(aggr_stat, 0, non_aggr_tx);
+ stat_printf(aggr_stat, 1, aggr_tx);
+
+ stat_printf(zero_len_del, 0, tx_zero_len_del);
+ stat_printf(zero_len_del, 1, rx_zero_len_del);
+#undef stat_printf
+
+ seq_puts(file, "Aggregations stats:\n");
+ for (i = 0; i < 4; i++) {
+ for (j = 0; j < 8; j++)
+ seq_printf(file, "%08llx ",
+ dev->stats.aggr_n[i * 8 + j]);
+ seq_putc(file, '\n');
+ }
+
+ seq_printf(file, "recent average AMPDU len: %d\n",
+ atomic_read(&dev->avg_ampdu_len));
+
+ return 0;
+}
+
+static int
+mt7601u_ampdu_stat_open(struct inode *inode, struct file *f)
+{
+ return single_open(f, mt7601u_ampdu_stat_read, inode->i_private);
+}
+
+static const struct file_operations fops_ampdu_stat = {
+ .open = mt7601u_ampdu_stat_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int
+mt7601u_eeprom_param_read(struct seq_file *file, void *data)
+{
+ struct mt7601u_dev *dev = file->private;
+ struct mt7601u_rate_power *rp = &dev->ee->power_rate_table;
+ struct tssi_data *td = &dev->ee->tssi_data;
+ int i;
+
+ seq_printf(file, "RF freq offset: %hhx\n", dev->ee->rf_freq_off);
+ seq_printf(file, "RSSI offset: %hhx %hhx\n",
+ dev->ee->rssi_offset[0], dev->ee->rssi_offset[1]);
+ seq_printf(file, "Reference temp: %hhx\n", dev->ee->ref_temp);
+ seq_printf(file, "LNA gain: %hhx\n", dev->ee->lna_gain);
+ seq_printf(file, "Reg channels: %hhu-%hhu\n", dev->ee->reg.start,
+ dev->ee->reg.start + dev->ee->reg.num - 1);
+
+ seq_puts(file, "Per rate power:\n");
+ for (i = 0; i < 2; i++)
+ seq_printf(file, "\t raw:%02hhx bw20:%02hhx bw40:%02hhx\n",
+ rp->cck[i].raw, rp->cck[i].bw20, rp->cck[i].bw40);
+ for (i = 0; i < 4; i++)
+ seq_printf(file, "\t raw:%02hhx bw20:%02hhx bw40:%02hhx\n",
+ rp->ofdm[i].raw, rp->ofdm[i].bw20, rp->ofdm[i].bw40);
+ for (i = 0; i < 4; i++)
+ seq_printf(file, "\t raw:%02hhx bw20:%02hhx bw40:%02hhx\n",
+ rp->ht[i].raw, rp->ht[i].bw20, rp->ht[i].bw40);
+
+ seq_puts(file, "Per channel power:\n");
+ for (i = 0; i < 7; i++)
+ seq_printf(file, "\t tx_power ch%u:%02hhx ch%u:%02hhx\n",
+ i * 2 + 1, dev->ee->chan_pwr[i * 2],
+ i * 2 + 2, dev->ee->chan_pwr[i * 2 + 1]);
+
+ if (!dev->ee->tssi_enabled)
+ return 0;
+
+ seq_puts(file, "TSSI:\n");
+ seq_printf(file, "\t slope:%02hhx\n", td->slope);
+ seq_printf(file, "\t offset=%02hhx %02hhx %02hhx\n",
+ td->offset[0], td->offset[1], td->offset[2]);
+ seq_printf(file, "\t delta_off:%08x\n", td->tx0_delta_offset);
+
+ return 0;
+}
+
+static int
+mt7601u_eeprom_param_open(struct inode *inode, struct file *f)
+{
+ return single_open(f, mt7601u_eeprom_param_read, inode->i_private);
+}
+
+static const struct file_operations fops_eeprom_param = {
+ .open = mt7601u_eeprom_param_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+void mt7601u_init_debugfs(struct mt7601u_dev *dev)
+{
+ struct dentry *dir;
+
+ dir = debugfs_create_dir("mt7601u", dev->hw->wiphy->debugfsdir);
+ if (!dir)
+ return;
+
+ debugfs_create_u8("temperature", S_IRUSR, dir, &dev->raw_temp);
+ debugfs_create_u32("temp_mode", S_IRUSR, dir, &dev->temp_mode);
+
+ debugfs_create_u32("regidx", S_IRUSR | S_IWUSR, dir, &dev->debugfs_reg);
+ debugfs_create_file("regval", S_IRUSR | S_IWUSR, dir, dev,
+ &fops_regval);
+ debugfs_create_file("ampdu_stat", S_IRUSR, dir, dev, &fops_ampdu_stat);
+ debugfs_create_file("eeprom_param", S_IRUSR, dir, dev,
+ &fops_eeprom_param);
+}
diff --git a/drivers/net/wireless/mediatek/mt7601u/dma.c b/drivers/net/wireless/mediatek/mt7601u/dma.c
new file mode 100644
index 0000000..7217da4
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt7601u/dma.c
@@ -0,0 +1,505 @@
+/*
+ * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include "mt7601u.h"
+#include "dma.h"
+#include "usb.h"
+#include "trace.h"
+
+static int mt7601u_submit_rx_buf(struct mt7601u_dev *dev,
+ struct mt7601u_dma_buf_rx *e, gfp_t gfp);
+
+static unsigned int ieee80211_get_hdrlen_from_buf(const u8 *data, unsigned len)
+{
+ const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *)data;
+ unsigned int hdrlen;
+
+ if (unlikely(len < 10))
+ return 0;
+ hdrlen = ieee80211_hdrlen(hdr->frame_control);
+ if (unlikely(hdrlen > len))
+ return 0;
+ return hdrlen;
+}
+
+static struct sk_buff *
+mt7601u_rx_skb_from_seg(struct mt7601u_dev *dev, struct mt7601u_rxwi *rxwi,
+ void *data, u32 seg_len, u32 truesize, struct page *p)
+{
+ struct sk_buff *skb;
+ u32 true_len, hdr_len = 0, copy, frag;
+
+ skb = alloc_skb(p ? 128 : seg_len, GFP_ATOMIC);
+ if (!skb)
+ return NULL;
+
+ true_len = mt76_mac_process_rx(dev, skb, data, rxwi);
+ if (!true_len || true_len > seg_len)
+ goto bad_frame;
+
+ hdr_len = ieee80211_get_hdrlen_from_buf(data, true_len);
+ if (!hdr_len)
+ goto bad_frame;
+
+ if (rxwi->rxinfo & cpu_to_le32(MT_RXINFO_L2PAD)) {
+ memcpy(skb_put(skb, hdr_len), data, hdr_len);
+
+ data += hdr_len + 2;
+ true_len -= hdr_len;
+ hdr_len = 0;
+ }
+
+ /* If not doing paged RX allocated skb will always have enough space */
+ copy = (true_len <= skb_tailroom(skb)) ? true_len : hdr_len + 8;
+ frag = true_len - copy;
+
+ memcpy(skb_put(skb, copy), data, copy);
+ data += copy;
+
+ if (frag) {
+ skb_add_rx_frag(skb, 0, p, data - page_address(p),
+ frag, truesize);
+ get_page(p);
+ }
+
+ return skb;
+
+bad_frame:
+ dev_err_ratelimited(dev->dev, "Error: incorrect frame len:%u hdr:%u\n",
+ true_len, hdr_len);
+ dev_kfree_skb(skb);
+ return NULL;
+}
+
+static void mt7601u_rx_process_seg(struct mt7601u_dev *dev, u8 *data,
+ u32 seg_len, struct page *p)
+{
+ struct sk_buff *skb;
+ struct mt7601u_rxwi *rxwi;
+ u32 fce_info, truesize = seg_len;
+
+ /* DMA_INFO field at the beginning of the segment contains only some of
+ * the information, we need to read the FCE descriptor from the end.
+ */
+ fce_info = get_unaligned_le32(data + seg_len - MT_FCE_INFO_LEN);
+ seg_len -= MT_FCE_INFO_LEN;
+
+ data += MT_DMA_HDR_LEN;
+ seg_len -= MT_DMA_HDR_LEN;
+
+ rxwi = (struct mt7601u_rxwi *) data;
+ data += sizeof(struct mt7601u_rxwi);
+ seg_len -= sizeof(struct mt7601u_rxwi);
+
+ if (unlikely(rxwi->zero[0] || rxwi->zero[1] || rxwi->zero[2]))
+ dev_err_once(dev->dev, "Error: RXWI zero fields are set\n");
+ if (unlikely(MT76_GET(MT_RXD_INFO_TYPE, fce_info)))
+ dev_err_once(dev->dev, "Error: RX path seen a non-pkt urb\n");
+
+ trace_mt_rx(dev, rxwi, fce_info);
+
+ skb = mt7601u_rx_skb_from_seg(dev, rxwi, data, seg_len, truesize, p);
+ if (!skb)
+ return;
+
+ ieee80211_rx_ni(dev->hw, skb);
+}
+
+static u16 mt7601u_rx_next_seg_len(u8 *data, u32 data_len)
+{
+ u32 min_seg_len = MT_DMA_HDR_LEN + MT_RX_INFO_LEN +
+ sizeof(struct mt7601u_rxwi) + MT_FCE_INFO_LEN;
+ u16 dma_len = get_unaligned_le16(data);
+
+ if (data_len < min_seg_len ||
+ WARN_ON(!dma_len) ||
+ WARN_ON(dma_len + MT_DMA_HDRS > data_len) ||
+ WARN_ON(dma_len & 0x3))
+ return 0;
+
+ return MT_DMA_HDRS + dma_len;
+}
+
+static void
+mt7601u_rx_process_entry(struct mt7601u_dev *dev, struct mt7601u_dma_buf_rx *e)
+{
+ u32 seg_len, data_len = e->urb->actual_length;
+ u8 *data = page_address(e->p);
+ struct page *new_p = NULL;
+ int cnt = 0;
+
+ if (!test_bit(MT7601U_STATE_INITIALIZED, &dev->state))
+ return;
+
+ /* Copy if there is very little data in the buffer. */
+ if (data_len > 512)
+ new_p = dev_alloc_pages(MT_RX_ORDER);
+
+ while ((seg_len = mt7601u_rx_next_seg_len(data, data_len))) {
+ mt7601u_rx_process_seg(dev, data, seg_len, new_p ? e->p : NULL);
+
+ data_len -= seg_len;
+ data += seg_len;
+ cnt++;
+ }
+
+ if (cnt > 1)
+ trace_mt_rx_dma_aggr(dev, cnt, !!new_p);
+
+ if (new_p) {
+ /* we have one extra ref from the allocator */
+ __free_pages(e->p, MT_RX_ORDER);
+
+ e->p = new_p;
+ }
+}
+
+static struct mt7601u_dma_buf_rx *
+mt7601u_rx_get_pending_entry(struct mt7601u_dev *dev)
+{
+ struct mt7601u_rx_queue *q = &dev->rx_q;
+ struct mt7601u_dma_buf_rx *buf = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->rx_lock, flags);
+
+ if (!q->pending)
+ goto out;
+
+ buf = &q->e[q->start];
+ q->pending--;
+ q->start = (q->start + 1) % q->entries;
+out:
+ spin_unlock_irqrestore(&dev->rx_lock, flags);
+
+ return buf;
+}
+
+static void mt7601u_complete_rx(struct urb *urb)
+{
+ struct mt7601u_dev *dev = urb->context;
+ struct mt7601u_rx_queue *q = &dev->rx_q;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->rx_lock, flags);
+
+ if (mt7601u_urb_has_error(urb))
+ dev_err(dev->dev, "Error: RX urb failed:%d\n", urb->status);
+ if (WARN_ONCE(q->e[q->end].urb != urb, "RX urb mismatch"))
+ goto out;
+
+ q->end = (q->end + 1) % q->entries;
+ q->pending++;
+ tasklet_schedule(&dev->rx_tasklet);
+out:
+ spin_unlock_irqrestore(&dev->rx_lock, flags);
+}
+
+static void mt7601u_rx_tasklet(unsigned long data)
+{
+ struct mt7601u_dev *dev = (struct mt7601u_dev *) data;
+ struct mt7601u_dma_buf_rx *e;
+
+ while ((e = mt7601u_rx_get_pending_entry(dev))) {
+ if (e->urb->status)
+ continue;
+
+ mt7601u_rx_process_entry(dev, e);
+ mt7601u_submit_rx_buf(dev, e, GFP_ATOMIC);
+ }
+}
+
+static void mt7601u_complete_tx(struct urb *urb)
+{
+ struct mt7601u_tx_queue *q = urb->context;
+ struct mt7601u_dev *dev = q->dev;
+ struct sk_buff *skb;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->tx_lock, flags);
+
+ if (mt7601u_urb_has_error(urb))
+ dev_err(dev->dev, "Error: TX urb failed:%d\n", urb->status);
+ if (WARN_ONCE(q->e[q->start].urb != urb, "TX urb mismatch"))
+ goto out;
+
+ skb = q->e[q->start].skb;
+ trace_mt_tx_dma_done(dev, skb);
+
+ mt7601u_tx_status(dev, skb);
+
+ if (q->used == q->entries - q->entries / 8)
+ ieee80211_wake_queue(dev->hw, skb_get_queue_mapping(skb));
+
+ q->start = (q->start + 1) % q->entries;
+ q->used--;
+
+ if (urb->status)
+ goto out;
+
+ set_bit(MT7601U_STATE_MORE_STATS, &dev->state);
+ if (!test_and_set_bit(MT7601U_STATE_READING_STATS, &dev->state))
+ queue_delayed_work(dev->stat_wq, &dev->stat_work,
+ msecs_to_jiffies(10));
+out:
+ spin_unlock_irqrestore(&dev->tx_lock, flags);
+}
+
+static int mt7601u_dma_submit_tx(struct mt7601u_dev *dev,
+ struct sk_buff *skb, u8 ep)
+{
+ struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);
+ unsigned snd_pipe = usb_sndbulkpipe(usb_dev, dev->out_eps[ep]);
+ struct mt7601u_dma_buf_tx *e;
+ struct mt7601u_tx_queue *q = &dev->tx_q[ep];
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&dev->tx_lock, flags);
+
+ if (WARN_ON(q->entries <= q->used)) {
+ ret = -ENOSPC;
+ goto out;
+ }
+
+ e = &q->e[q->end];
+ e->skb = skb;
+ usb_fill_bulk_urb(e->urb, usb_dev, snd_pipe, skb->data, skb->len,
+ mt7601u_complete_tx, q);
+ ret = usb_submit_urb(e->urb, GFP_ATOMIC);
+ if (ret) {
+ /* Special-handle ENODEV from TX urb submission because it will
+ * often be the first ENODEV we see after device is removed.
+ */
+ if (ret == -ENODEV)
+ set_bit(MT7601U_STATE_REMOVED, &dev->state);
+ else
+ dev_err(dev->dev, "Error: TX urb submit failed:%d\n",
+ ret);
+ goto out;
+ }
+
+ q->end = (q->end + 1) % q->entries;
+ q->used++;
+
+ if (q->used >= q->entries)
+ ieee80211_stop_queue(dev->hw, skb_get_queue_mapping(skb));
+out:
+ spin_unlock_irqrestore(&dev->tx_lock, flags);
+
+ return ret;
+}
+
+/* Map hardware Q to USB endpoint number */
+static u8 q2ep(u8 qid)
+{
+ /* TODO: take management packets to queue 5 */
+ return qid + 1;
+}
+
+/* Map USB endpoint number to Q id in the DMA engine */
+static enum mt76_qsel ep2dmaq(u8 ep)
+{
+ if (ep == 5)
+ return MT_QSEL_MGMT;
+ return MT_QSEL_EDCA;
+}
+
+int mt7601u_dma_enqueue_tx(struct mt7601u_dev *dev, struct sk_buff *skb,
+ struct mt76_wcid *wcid, int hw_q)
+{
+ u8 ep = q2ep(hw_q);
+ u32 dma_flags;
+ int ret;
+
+ dma_flags = MT_TXD_PKT_INFO_80211;
+ if (wcid->hw_key_idx == 0xff)
+ dma_flags |= MT_TXD_PKT_INFO_WIV;
+
+ ret = mt7601u_dma_skb_wrap_pkt(skb, ep2dmaq(ep), dma_flags);
+ if (ret)
+ return ret;
+
+ ret = mt7601u_dma_submit_tx(dev, skb, ep);
+ if (ret) {
+ ieee80211_free_txskb(dev->hw, skb);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void mt7601u_kill_rx(struct mt7601u_dev *dev)
+{
+ int i;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->rx_lock, flags);
+
+ for (i = 0; i < dev->rx_q.entries; i++) {
+ int next = dev->rx_q.end;
+
+ spin_unlock_irqrestore(&dev->rx_lock, flags);
+ usb_poison_urb(dev->rx_q.e[next].urb);
+ spin_lock_irqsave(&dev->rx_lock, flags);
+ }
+
+ spin_unlock_irqrestore(&dev->rx_lock, flags);
+}
+
+static int mt7601u_submit_rx_buf(struct mt7601u_dev *dev,
+ struct mt7601u_dma_buf_rx *e, gfp_t gfp)
+{
+ struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);
+ u8 *buf = page_address(e->p);
+ unsigned pipe;
+ int ret;
+
+ pipe = usb_rcvbulkpipe(usb_dev, dev->in_eps[MT_EP_IN_PKT_RX]);
+
+ usb_fill_bulk_urb(e->urb, usb_dev, pipe, buf, MT_RX_URB_SIZE,
+ mt7601u_complete_rx, dev);
+
+ trace_mt_submit_urb(dev, e->urb);
+ ret = usb_submit_urb(e->urb, gfp);
+ if (ret)
+ dev_err(dev->dev, "Error: submit RX URB failed:%d\n", ret);
+
+ return ret;
+}
+
+static int mt7601u_submit_rx(struct mt7601u_dev *dev)
+{
+ int i, ret;
+
+ for (i = 0; i < dev->rx_q.entries; i++) {
+ ret = mt7601u_submit_rx_buf(dev, &dev->rx_q.e[i], GFP_KERNEL);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static void mt7601u_free_rx(struct mt7601u_dev *dev)
+{
+ int i;
+
+ for (i = 0; i < dev->rx_q.entries; i++) {
+ __free_pages(dev->rx_q.e[i].p, MT_RX_ORDER);
+ usb_free_urb(dev->rx_q.e[i].urb);
+ }
+}
+
+static int mt7601u_alloc_rx(struct mt7601u_dev *dev)
+{
+ int i;
+
+ memset(&dev->rx_q, 0, sizeof(dev->rx_q));
+ dev->rx_q.dev = dev;
+ dev->rx_q.entries = N_RX_ENTRIES;
+
+ for (i = 0; i < N_RX_ENTRIES; i++) {
+ dev->rx_q.e[i].urb = usb_alloc_urb(0, GFP_KERNEL);
+ dev->rx_q.e[i].p = dev_alloc_pages(MT_RX_ORDER);
+
+ if (!dev->rx_q.e[i].urb || !dev->rx_q.e[i].p)
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void mt7601u_free_tx_queue(struct mt7601u_tx_queue *q)
+{
+ int i;
+
+ WARN_ON(q->used);
+
+ for (i = 0; i < q->entries; i++) {
+ usb_poison_urb(q->e[i].urb);
+ usb_free_urb(q->e[i].urb);
+ }
+}
+
+static void mt7601u_free_tx(struct mt7601u_dev *dev)
+{
+ int i;
+
+ for (i = 0; i < __MT_EP_OUT_MAX; i++)
+ mt7601u_free_tx_queue(&dev->tx_q[i]);
+}
+
+static int mt7601u_alloc_tx_queue(struct mt7601u_dev *dev,
+ struct mt7601u_tx_queue *q)
+{
+ int i;
+
+ q->dev = dev;
+ q->entries = N_TX_ENTRIES;
+
+ for (i = 0; i < N_TX_ENTRIES; i++) {
+ q->e[i].urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!q->e[i].urb)
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static int mt7601u_alloc_tx(struct mt7601u_dev *dev)
+{
+ int i;
+
+ dev->tx_q = devm_kcalloc(dev->dev, __MT_EP_OUT_MAX,
+ sizeof(*dev->tx_q), GFP_KERNEL);
+
+ for (i = 0; i < __MT_EP_OUT_MAX; i++)
+ if (mt7601u_alloc_tx_queue(dev, &dev->tx_q[i]))
+ return -ENOMEM;
+
+ return 0;
+}
+
+int mt7601u_dma_init(struct mt7601u_dev *dev)
+{
+ int ret = -ENOMEM;
+
+ tasklet_init(&dev->rx_tasklet, mt7601u_rx_tasklet, (unsigned long) dev);
+
+ ret = mt7601u_alloc_tx(dev);
+ if (ret)
+ goto err;
+ ret = mt7601u_alloc_rx(dev);
+ if (ret)
+ goto err;
+
+ ret = mt7601u_submit_rx(dev);
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ mt7601u_dma_cleanup(dev);
+ return ret;
+}
+
+void mt7601u_dma_cleanup(struct mt7601u_dev *dev)
+{
+ mt7601u_kill_rx(dev);
+
+ tasklet_kill(&dev->rx_tasklet);
+
+ mt7601u_free_rx(dev);
+ mt7601u_free_tx(dev);
+}
diff --git a/drivers/net/wireless/mediatek/mt7601u/dma.h b/drivers/net/wireless/mediatek/mt7601u/dma.h
new file mode 100644
index 0000000..978e8a9
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt7601u/dma.h
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MT7601U_DMA_H
+#define __MT7601U_DMA_H
+
+#include <asm/unaligned.h>
+#include <linux/skbuff.h>
+
+#include "util.h"
+
+#define MT_DMA_HDR_LEN 4
+#define MT_RX_INFO_LEN 4
+#define MT_FCE_INFO_LEN 4
+#define MT_DMA_HDRS (MT_DMA_HDR_LEN + MT_RX_INFO_LEN)
+
+/* Common Tx DMA descriptor fields */
+#define MT_TXD_INFO_LEN GENMASK(15, 0)
+#define MT_TXD_INFO_D_PORT GENMASK(29, 27)
+#define MT_TXD_INFO_TYPE GENMASK(31, 30)
+
+enum mt76_msg_port {
+ WLAN_PORT,
+ CPU_RX_PORT,
+ CPU_TX_PORT,
+ HOST_PORT,
+ VIRTUAL_CPU_RX_PORT,
+ VIRTUAL_CPU_TX_PORT,
+ DISCARD,
+};
+
+enum mt76_info_type {
+ DMA_PACKET,
+ DMA_COMMAND,
+};
+
+/* Tx DMA packet specific flags */
+#define MT_TXD_PKT_INFO_NEXT_VLD BIT(16)
+#define MT_TXD_PKT_INFO_TX_BURST BIT(17)
+#define MT_TXD_PKT_INFO_80211 BIT(19)
+#define MT_TXD_PKT_INFO_TSO BIT(20)
+#define MT_TXD_PKT_INFO_CSO BIT(21)
+#define MT_TXD_PKT_INFO_WIV BIT(24)
+#define MT_TXD_PKT_INFO_QSEL GENMASK(26, 25)
+
+enum mt76_qsel {
+ MT_QSEL_MGMT,
+ MT_QSEL_HCCA,
+ MT_QSEL_EDCA,
+ MT_QSEL_EDCA_2,
+};
+
+/* Tx DMA MCU command specific flags */
+#define MT_TXD_CMD_INFO_SEQ GENMASK(19, 16)
+#define MT_TXD_CMD_INFO_TYPE GENMASK(26, 20)
+
+static inline int mt7601u_dma_skb_wrap(struct sk_buff *skb,
+ enum mt76_msg_port d_port,
+ enum mt76_info_type type, u32 flags)
+{
+ u32 info;
+
+ /* Buffer layout:
+ * | 4B | xfer len | pad | 4B |
+ * | TXINFO | pkt/cmd | zero pad to 4B | zero |
+ *
+ * length field of TXINFO should be set to 'xfer len'.
+ */