[][MAC80211][misc][preliminary version of Filogic 680 on Filogic 880]
[Description]
Add preliminary version of Filogic 680 on Filogic 880.
Based on mt76 revision: 269df4b01f27 ("wifi: mt76: fix rx checksum offload on mt7615/mt7915/mt7921")
This series adds mt7996, a new mac80211 driver for MediaTek Wi-Fi 7
(802.11be) devices, which currently supports AP, station, mesh, and
monitor modes.
mt7996 first supports Filogic 680, which is a Wi-Fi 7 chipset supporting
concurrent tri-band operation at 6 GHz, 5 GHz, and 2.4 GHz with 4x4
antennas on each band. There are several variants that will be added in
upcoming patches. For more details, please refer to [1].
mt7996 supports only Wi-Fi 6E at the moment, whereas Wi-Fi 7 and its
specific features are work in progress. They will be introduced in
further patches.
[1] https://corp.mediatek.com/news-events/press-releases/mediatek-announces-worlds-first-complete-wi-fi-7-platforms-for-access-points-and-clients
[Release-log]
N/A
Change-Id: I7d3dea2626556751c9b0462e587743fad5287be0
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6709775
diff --git a/autobuild_mac80211_release/mt7988_mt7996_mac80211/package/kernel/mt76/src/usb.c b/autobuild_mac80211_release/mt7988_mt7996_mac80211/package/kernel/mt76/src/usb.c
new file mode 100644
index 0000000..c1c9653
--- /dev/null
+++ b/autobuild_mac80211_release/mt7988_mt7996_mac80211/package/kernel/mt76/src/usb.c
@@ -0,0 +1,1130 @@
+// SPDX-License-Identifier: ISC
+/*
+ * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
+ */
+
+#include <linux/module.h>
+#include "mt76.h"
+#include "usb_trace.h"
+#include "dma.h"
+
+#define MT_VEND_REQ_MAX_RETRY 10
+#define MT_VEND_REQ_TOUT_MS 300
+
+static bool disable_usb_sg;
+module_param_named(disable_usb_sg, disable_usb_sg, bool, 0644);
+MODULE_PARM_DESC(disable_usb_sg, "Disable usb scatter-gather support");
+
+int __mt76u_vendor_request(struct mt76_dev *dev, u8 req, u8 req_type,
+ u16 val, u16 offset, void *buf, size_t len)
+{
+ struct usb_interface *uintf = to_usb_interface(dev->dev);
+ struct usb_device *udev = interface_to_usbdev(uintf);
+ unsigned int pipe;
+ int i, ret;
+
+ lockdep_assert_held(&dev->usb.usb_ctrl_mtx);
+
+ pipe = (req_type & USB_DIR_IN) ? usb_rcvctrlpipe(udev, 0)
+ : usb_sndctrlpipe(udev, 0);
+ for (i = 0; i < MT_VEND_REQ_MAX_RETRY; i++) {
+ if (test_bit(MT76_REMOVED, &dev->phy.state))
+ return -EIO;
+
+ ret = usb_control_msg(udev, pipe, req, req_type, val,
+ offset, buf, len, MT_VEND_REQ_TOUT_MS);
+ if (ret == -ENODEV)
+ set_bit(MT76_REMOVED, &dev->phy.state);
+ if (ret >= 0 || ret == -ENODEV)
+ return ret;
+ usleep_range(5000, 10000);
+ }
+
+ dev_err(dev->dev, "vendor request req:%02x off:%04x failed:%d\n",
+ req, offset, ret);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(__mt76u_vendor_request);
+
+int mt76u_vendor_request(struct mt76_dev *dev, u8 req,
+ u8 req_type, u16 val, u16 offset,
+ void *buf, size_t len)
+{
+ int ret;
+
+ mutex_lock(&dev->usb.usb_ctrl_mtx);
+ ret = __mt76u_vendor_request(dev, req, req_type,
+ val, offset, buf, len);
+ trace_usb_reg_wr(dev, offset, val);
+ mutex_unlock(&dev->usb.usb_ctrl_mtx);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(mt76u_vendor_request);
+
+u32 ___mt76u_rr(struct mt76_dev *dev, u8 req, u8 req_type, u32 addr)
+{
+ struct mt76_usb *usb = &dev->usb;
+ u32 data = ~0;
+ int ret;
+
+ ret = __mt76u_vendor_request(dev, req, req_type, addr >> 16,
+ addr, usb->data, sizeof(__le32));
+ if (ret == sizeof(__le32))
+ data = get_unaligned_le32(usb->data);
+ trace_usb_reg_rr(dev, addr, data);
+
+ return data;
+}
+EXPORT_SYMBOL_GPL(___mt76u_rr);
+
+static u32 __mt76u_rr(struct mt76_dev *dev, u32 addr)
+{
+ u8 req;
+
+ switch (addr & MT_VEND_TYPE_MASK) {
+ case MT_VEND_TYPE_EEPROM:
+ req = MT_VEND_READ_EEPROM;
+ break;
+ case MT_VEND_TYPE_CFG:
+ req = MT_VEND_READ_CFG;
+ break;
+ default:
+ req = MT_VEND_MULTI_READ;
+ break;
+ }
+
+ return ___mt76u_rr(dev, req, USB_DIR_IN | USB_TYPE_VENDOR,
+ addr & ~MT_VEND_TYPE_MASK);
+}
+
+static u32 mt76u_rr(struct mt76_dev *dev, u32 addr)
+{
+ u32 ret;
+
+ mutex_lock(&dev->usb.usb_ctrl_mtx);
+ ret = __mt76u_rr(dev, addr);
+ mutex_unlock(&dev->usb.usb_ctrl_mtx);
+
+ return ret;
+}
+
+void ___mt76u_wr(struct mt76_dev *dev, u8 req, u8 req_type,
+ u32 addr, u32 val)
+{
+ struct mt76_usb *usb = &dev->usb;
+
+ put_unaligned_le32(val, usb->data);
+ __mt76u_vendor_request(dev, req, req_type, addr >> 16,
+ addr, usb->data, sizeof(__le32));
+ trace_usb_reg_wr(dev, addr, val);
+}
+EXPORT_SYMBOL_GPL(___mt76u_wr);
+
+static void __mt76u_wr(struct mt76_dev *dev, u32 addr, u32 val)
+{
+ u8 req;
+
+ switch (addr & MT_VEND_TYPE_MASK) {
+ case MT_VEND_TYPE_CFG:
+ req = MT_VEND_WRITE_CFG;
+ break;
+ default:
+ req = MT_VEND_MULTI_WRITE;
+ break;
+ }
+ ___mt76u_wr(dev, req, USB_DIR_OUT | USB_TYPE_VENDOR,
+ addr & ~MT_VEND_TYPE_MASK, val);
+}
+
+static void mt76u_wr(struct mt76_dev *dev, u32 addr, u32 val)
+{
+ mutex_lock(&dev->usb.usb_ctrl_mtx);
+ __mt76u_wr(dev, addr, val);
+ mutex_unlock(&dev->usb.usb_ctrl_mtx);
+}
+
+static u32 mt76u_rmw(struct mt76_dev *dev, u32 addr,
+ u32 mask, u32 val)
+{
+ mutex_lock(&dev->usb.usb_ctrl_mtx);
+ val |= __mt76u_rr(dev, addr) & ~mask;
+ __mt76u_wr(dev, addr, val);
+ mutex_unlock(&dev->usb.usb_ctrl_mtx);
+
+ return val;
+}
+
+static void mt76u_copy(struct mt76_dev *dev, u32 offset,
+ const void *data, int len)
+{
+ struct mt76_usb *usb = &dev->usb;
+ const u8 *val = data;
+ int ret;
+ int current_batch_size;
+ int i = 0;
+
+ /* Assure that always a multiple of 4 bytes are copied,
+ * otherwise beacons can be corrupted.
+ * See: "mt76: round up length on mt76_wr_copy"
+ * Commit 850e8f6fbd5d0003b0
+ */
+ len = round_up(len, 4);
+
+ mutex_lock(&usb->usb_ctrl_mtx);
+ while (i < len) {
+ current_batch_size = min_t(int, usb->data_len, len - i);
+ memcpy(usb->data, val + i, current_batch_size);
+ ret = __mt76u_vendor_request(dev, MT_VEND_MULTI_WRITE,
+ USB_DIR_OUT | USB_TYPE_VENDOR,
+ 0, offset + i, usb->data,
+ current_batch_size);
+ if (ret < 0)
+ break;
+
+ i += current_batch_size;
+ }
+ mutex_unlock(&usb->usb_ctrl_mtx);
+}
+
+void mt76u_read_copy(struct mt76_dev *dev, u32 offset,
+ void *data, int len)
+{
+ struct mt76_usb *usb = &dev->usb;
+ int i = 0, batch_len, ret;
+ u8 *val = data;
+
+ len = round_up(len, 4);
+ mutex_lock(&usb->usb_ctrl_mtx);
+ while (i < len) {
+ batch_len = min_t(int, usb->data_len, len - i);
+ ret = __mt76u_vendor_request(dev, MT_VEND_READ_EXT,
+ USB_DIR_IN | USB_TYPE_VENDOR,
+ (offset + i) >> 16, offset + i,
+ usb->data, batch_len);
+ if (ret < 0)
+ break;
+
+ memcpy(val + i, usb->data, batch_len);
+ i += batch_len;
+ }
+ mutex_unlock(&usb->usb_ctrl_mtx);
+}
+EXPORT_SYMBOL_GPL(mt76u_read_copy);
+
+void mt76u_single_wr(struct mt76_dev *dev, const u8 req,
+ const u16 offset, const u32 val)
+{
+ mutex_lock(&dev->usb.usb_ctrl_mtx);
+ __mt76u_vendor_request(dev, req,
+ USB_DIR_OUT | USB_TYPE_VENDOR,
+ val & 0xffff, offset, NULL, 0);
+ __mt76u_vendor_request(dev, req,
+ USB_DIR_OUT | USB_TYPE_VENDOR,
+ val >> 16, offset + 2, NULL, 0);
+ mutex_unlock(&dev->usb.usb_ctrl_mtx);
+}
+EXPORT_SYMBOL_GPL(mt76u_single_wr);
+
+static int
+mt76u_req_wr_rp(struct mt76_dev *dev, u32 base,
+ const struct mt76_reg_pair *data, int len)
+{
+ struct mt76_usb *usb = &dev->usb;
+
+ mutex_lock(&usb->usb_ctrl_mtx);
+ while (len > 0) {
+ __mt76u_wr(dev, base + data->reg, data->value);
+ len--;
+ data++;
+ }
+ mutex_unlock(&usb->usb_ctrl_mtx);
+
+ return 0;
+}
+
+static int
+mt76u_wr_rp(struct mt76_dev *dev, u32 base,
+ const struct mt76_reg_pair *data, int n)
+{
+ if (test_bit(MT76_STATE_MCU_RUNNING, &dev->phy.state))
+ return dev->mcu_ops->mcu_wr_rp(dev, base, data, n);
+ else
+ return mt76u_req_wr_rp(dev, base, data, n);
+}
+
+static int
+mt76u_req_rd_rp(struct mt76_dev *dev, u32 base, struct mt76_reg_pair *data,
+ int len)
+{
+ struct mt76_usb *usb = &dev->usb;
+
+ mutex_lock(&usb->usb_ctrl_mtx);
+ while (len > 0) {
+ data->value = __mt76u_rr(dev, base + data->reg);
+ len--;
+ data++;
+ }
+ mutex_unlock(&usb->usb_ctrl_mtx);
+
+ return 0;
+}
+
+static int
+mt76u_rd_rp(struct mt76_dev *dev, u32 base,
+ struct mt76_reg_pair *data, int n)
+{
+ if (test_bit(MT76_STATE_MCU_RUNNING, &dev->phy.state))
+ return dev->mcu_ops->mcu_rd_rp(dev, base, data, n);
+ else
+ return mt76u_req_rd_rp(dev, base, data, n);
+}
+
+static bool mt76u_check_sg(struct mt76_dev *dev)
+{
+ struct usb_interface *uintf = to_usb_interface(dev->dev);
+ struct usb_device *udev = interface_to_usbdev(uintf);
+
+ return (!disable_usb_sg && udev->bus->sg_tablesize > 0 &&
+ (udev->bus->no_sg_constraint ||
+ udev->speed == USB_SPEED_WIRELESS));
+}
+
+static int
+mt76u_set_endpoints(struct usb_interface *intf,
+ struct mt76_usb *usb)
+{
+ struct usb_host_interface *intf_desc = intf->cur_altsetting;
+ struct usb_endpoint_descriptor *ep_desc;
+ int i, in_ep = 0, out_ep = 0;
+
+ for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
+ ep_desc = &intf_desc->endpoint[i].desc;
+
+ if (usb_endpoint_is_bulk_in(ep_desc) &&
+ in_ep < __MT_EP_IN_MAX) {
+ usb->in_ep[in_ep] = usb_endpoint_num(ep_desc);
+ in_ep++;
+ } else if (usb_endpoint_is_bulk_out(ep_desc) &&
+ out_ep < __MT_EP_OUT_MAX) {
+ usb->out_ep[out_ep] = usb_endpoint_num(ep_desc);
+ out_ep++;
+ }
+ }
+
+ if (in_ep != __MT_EP_IN_MAX || out_ep != __MT_EP_OUT_MAX)
+ return -EINVAL;
+ return 0;
+}
+
+static int
+mt76u_fill_rx_sg(struct mt76_dev *dev, struct mt76_queue *q, struct urb *urb,
+ int nsgs, gfp_t gfp)
+{
+ int i;
+
+ for (i = 0; i < nsgs; i++) {
+ struct page *page;
+ void *data;
+ int offset;
+
+ data = page_frag_alloc(&q->rx_page, q->buf_size, gfp);
+ if (!data)
+ break;
+
+ page = virt_to_head_page(data);
+ offset = data - page_address(page);
+ sg_set_page(&urb->sg[i], page, q->buf_size, offset);
+ }
+
+ if (i < nsgs) {
+ int j;
+
+ for (j = nsgs; j < urb->num_sgs; j++)
+ skb_free_frag(sg_virt(&urb->sg[j]));
+ urb->num_sgs = i;
+ }
+
+ urb->num_sgs = max_t(int, i, urb->num_sgs);
+ urb->transfer_buffer_length = urb->num_sgs * q->buf_size;
+ sg_init_marker(urb->sg, urb->num_sgs);
+
+ return i ? : -ENOMEM;
+}
+
+static int
+mt76u_refill_rx(struct mt76_dev *dev, struct mt76_queue *q,
+ struct urb *urb, int nsgs, gfp_t gfp)
+{
+ enum mt76_rxq_id qid = q - &dev->q_rx[MT_RXQ_MAIN];
+
+ if (qid == MT_RXQ_MAIN && dev->usb.sg_en)
+ return mt76u_fill_rx_sg(dev, q, urb, nsgs, gfp);
+
+ urb->transfer_buffer_length = q->buf_size;
+ urb->transfer_buffer = page_frag_alloc(&q->rx_page, q->buf_size, gfp);
+
+ return urb->transfer_buffer ? 0 : -ENOMEM;
+}
+
+static int
+mt76u_urb_alloc(struct mt76_dev *dev, struct mt76_queue_entry *e,
+ int sg_max_size)
+{
+ unsigned int size = sizeof(struct urb);
+
+ if (dev->usb.sg_en)
+ size += sg_max_size * sizeof(struct scatterlist);
+
+ e->urb = kzalloc(size, GFP_KERNEL);
+ if (!e->urb)
+ return -ENOMEM;
+
+ usb_init_urb(e->urb);
+
+ if (dev->usb.sg_en && sg_max_size > 0)
+ e->urb->sg = (struct scatterlist *)(e->urb + 1);
+
+ return 0;
+}
+
+static int
+mt76u_rx_urb_alloc(struct mt76_dev *dev, struct mt76_queue *q,
+ struct mt76_queue_entry *e)
+{
+ enum mt76_rxq_id qid = q - &dev->q_rx[MT_RXQ_MAIN];
+ int err, sg_size;
+
+ sg_size = qid == MT_RXQ_MAIN ? MT_RX_SG_MAX_SIZE : 0;
+ err = mt76u_urb_alloc(dev, e, sg_size);
+ if (err)
+ return err;
+
+ return mt76u_refill_rx(dev, q, e->urb, sg_size, GFP_KERNEL);
+}
+
+static void mt76u_urb_free(struct urb *urb)
+{
+ int i;
+
+ for (i = 0; i < urb->num_sgs; i++)
+ skb_free_frag(sg_virt(&urb->sg[i]));
+
+ if (urb->transfer_buffer)
+ skb_free_frag(urb->transfer_buffer);
+
+ usb_free_urb(urb);
+}
+
+static void
+mt76u_fill_bulk_urb(struct mt76_dev *dev, int dir, int index,
+ struct urb *urb, usb_complete_t complete_fn,
+ void *context)
+{
+ struct usb_interface *uintf = to_usb_interface(dev->dev);
+ struct usb_device *udev = interface_to_usbdev(uintf);
+ unsigned int pipe;
+
+ if (dir == USB_DIR_IN)
+ pipe = usb_rcvbulkpipe(udev, dev->usb.in_ep[index]);
+ else
+ pipe = usb_sndbulkpipe(udev, dev->usb.out_ep[index]);
+
+ urb->dev = udev;
+ urb->pipe = pipe;
+ urb->complete = complete_fn;
+ urb->context = context;
+}
+
+static struct urb *
+mt76u_get_next_rx_entry(struct mt76_queue *q)
+{
+ struct urb *urb = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&q->lock, flags);
+ if (q->queued > 0) {
+ urb = q->entry[q->tail].urb;
+ q->tail = (q->tail + 1) % q->ndesc;
+ q->queued--;
+ }
+ spin_unlock_irqrestore(&q->lock, flags);
+
+ return urb;
+}
+
+static int
+mt76u_get_rx_entry_len(struct mt76_dev *dev, u8 *data,
+ u32 data_len)
+{
+ u16 dma_len, min_len;
+
+ dma_len = get_unaligned_le16(data);
+ if (dev->drv->drv_flags & MT_DRV_RX_DMA_HDR)
+ return dma_len;
+
+ min_len = MT_DMA_HDR_LEN + MT_RX_RXWI_LEN + MT_FCE_INFO_LEN;
+ if (data_len < min_len || !dma_len ||
+ dma_len + MT_DMA_HDR_LEN > data_len ||
+ (dma_len & 0x3))
+ return -EINVAL;
+ return dma_len;
+}
+
+static struct sk_buff *
+mt76u_build_rx_skb(struct mt76_dev *dev, void *data,
+ int len, int buf_size)
+{
+ int head_room, drv_flags = dev->drv->drv_flags;
+ struct sk_buff *skb;
+
+ head_room = drv_flags & MT_DRV_RX_DMA_HDR ? 0 : MT_DMA_HDR_LEN;
+ if (SKB_WITH_OVERHEAD(buf_size) < head_room + len) {
+ struct page *page;
+
+ /* slow path, not enough space for data and
+ * skb_shared_info
+ */
+ skb = alloc_skb(MT_SKB_HEAD_LEN, GFP_ATOMIC);
+ if (!skb)
+ return NULL;
+
+ skb_put_data(skb, data + head_room, MT_SKB_HEAD_LEN);
+ data += head_room + MT_SKB_HEAD_LEN;
+ page = virt_to_head_page(data);
+ skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
+ page, data - page_address(page),
+ len - MT_SKB_HEAD_LEN, buf_size);
+
+ return skb;
+ }
+
+ /* fast path */
+ skb = build_skb(data, buf_size);
+ if (!skb)
+ return NULL;
+
+ skb_reserve(skb, head_room);
+ __skb_put(skb, len);
+
+ return skb;
+}
+
+static int
+mt76u_process_rx_entry(struct mt76_dev *dev, struct urb *urb,
+ int buf_size)
+{
+ u8 *data = urb->num_sgs ? sg_virt(&urb->sg[0]) : urb->transfer_buffer;
+ int data_len = urb->num_sgs ? urb->sg[0].length : urb->actual_length;
+ int len, nsgs = 1, head_room, drv_flags = dev->drv->drv_flags;
+ struct sk_buff *skb;
+
+ if (!test_bit(MT76_STATE_INITIALIZED, &dev->phy.state))
+ return 0;
+
+ len = mt76u_get_rx_entry_len(dev, data, urb->actual_length);
+ if (len < 0)
+ return 0;
+
+ head_room = drv_flags & MT_DRV_RX_DMA_HDR ? 0 : MT_DMA_HDR_LEN;
+ data_len = min_t(int, len, data_len - head_room);
+
+ if (len == data_len &&
+ dev->drv->rx_check && !dev->drv->rx_check(dev, data, data_len))
+ return 0;
+
+ skb = mt76u_build_rx_skb(dev, data, data_len, buf_size);
+ if (!skb)
+ return 0;
+
+ len -= data_len;
+ while (len > 0 && nsgs < urb->num_sgs) {
+ data_len = min_t(int, len, urb->sg[nsgs].length);
+ skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
+ sg_page(&urb->sg[nsgs]),
+ urb->sg[nsgs].offset, data_len,
+ buf_size);
+ len -= data_len;
+ nsgs++;
+ }
+ dev->drv->rx_skb(dev, MT_RXQ_MAIN, skb);
+
+ return nsgs;
+}
+
+static void mt76u_complete_rx(struct urb *urb)
+{
+ struct mt76_dev *dev = dev_get_drvdata(&urb->dev->dev);
+ struct mt76_queue *q = urb->context;
+ unsigned long flags;
+
+ trace_rx_urb(dev, urb);
+
+ switch (urb->status) {
+ case -ECONNRESET:
+ case -ESHUTDOWN:
+ case -ENOENT:
+ case -EPROTO:
+ return;
+ default:
+ dev_err_ratelimited(dev->dev, "rx urb failed: %d\n",
+ urb->status);
+ fallthrough;
+ case 0:
+ break;
+ }
+
+ spin_lock_irqsave(&q->lock, flags);
+ if (WARN_ONCE(q->entry[q->head].urb != urb, "rx urb mismatch"))
+ goto out;
+
+ q->head = (q->head + 1) % q->ndesc;
+ q->queued++;
+ mt76_worker_schedule(&dev->usb.rx_worker);
+out:
+ spin_unlock_irqrestore(&q->lock, flags);
+}
+
+static int
+mt76u_submit_rx_buf(struct mt76_dev *dev, enum mt76_rxq_id qid,
+ struct urb *urb)
+{
+ int ep = qid == MT_RXQ_MAIN ? MT_EP_IN_PKT_RX : MT_EP_IN_CMD_RESP;
+
+ mt76u_fill_bulk_urb(dev, USB_DIR_IN, ep, urb,
+ mt76u_complete_rx, &dev->q_rx[qid]);
+ trace_submit_urb(dev, urb);
+
+ return usb_submit_urb(urb, GFP_ATOMIC);
+}
+
+static void
+mt76u_process_rx_queue(struct mt76_dev *dev, struct mt76_queue *q)
+{
+ int qid = q - &dev->q_rx[MT_RXQ_MAIN];
+ struct urb *urb;
+ int err, count;
+
+ while (true) {
+ urb = mt76u_get_next_rx_entry(q);
+ if (!urb)
+ break;
+
+ count = mt76u_process_rx_entry(dev, urb, q->buf_size);
+ if (count > 0) {
+ err = mt76u_refill_rx(dev, q, urb, count, GFP_ATOMIC);
+ if (err < 0)
+ break;
+ }
+ mt76u_submit_rx_buf(dev, qid, urb);
+ }
+ if (qid == MT_RXQ_MAIN) {
+ local_bh_disable();
+ mt76_rx_poll_complete(dev, MT_RXQ_MAIN, NULL);
+ local_bh_enable();
+ }
+}
+
+static void mt76u_rx_worker(struct mt76_worker *w)
+{
+ struct mt76_usb *usb = container_of(w, struct mt76_usb, rx_worker);
+ struct mt76_dev *dev = container_of(usb, struct mt76_dev, usb);
+ int i;
+
+ rcu_read_lock();
+ mt76_for_each_q_rx(dev, i)
+ mt76u_process_rx_queue(dev, &dev->q_rx[i]);
+ rcu_read_unlock();
+}
+
+static int
+mt76u_submit_rx_buffers(struct mt76_dev *dev, enum mt76_rxq_id qid)
+{
+ struct mt76_queue *q = &dev->q_rx[qid];
+ unsigned long flags;
+ int i, err = 0;
+
+ spin_lock_irqsave(&q->lock, flags);
+ for (i = 0; i < q->ndesc; i++) {
+ err = mt76u_submit_rx_buf(dev, qid, q->entry[i].urb);
+ if (err < 0)
+ break;
+ }
+ q->head = q->tail = 0;
+ q->queued = 0;
+ spin_unlock_irqrestore(&q->lock, flags);
+
+ return err;
+}
+
+static int
+mt76u_alloc_rx_queue(struct mt76_dev *dev, enum mt76_rxq_id qid)
+{
+ struct mt76_queue *q = &dev->q_rx[qid];
+ int i, err;
+
+ spin_lock_init(&q->lock);
+ q->entry = devm_kcalloc(dev->dev,
+ MT_NUM_RX_ENTRIES, sizeof(*q->entry),
+ GFP_KERNEL);
+ if (!q->entry)
+ return -ENOMEM;
+
+ q->ndesc = MT_NUM_RX_ENTRIES;
+ q->buf_size = PAGE_SIZE;
+
+ for (i = 0; i < q->ndesc; i++) {
+ err = mt76u_rx_urb_alloc(dev, q, &q->entry[i]);
+ if (err < 0)
+ return err;
+ }
+
+ return mt76u_submit_rx_buffers(dev, qid);
+}
+
+int mt76u_alloc_mcu_queue(struct mt76_dev *dev)
+{
+ return mt76u_alloc_rx_queue(dev, MT_RXQ_MCU);
+}
+EXPORT_SYMBOL_GPL(mt76u_alloc_mcu_queue);
+
+static void
+mt76u_free_rx_queue(struct mt76_dev *dev, struct mt76_queue *q)
+{
+ struct page *page;
+ int i;
+
+ for (i = 0; i < q->ndesc; i++) {
+ if (!q->entry[i].urb)
+ continue;
+
+ mt76u_urb_free(q->entry[i].urb);
+ q->entry[i].urb = NULL;
+ }
+
+ if (!q->rx_page.va)
+ return;
+
+ page = virt_to_page(q->rx_page.va);
+ __page_frag_cache_drain(page, q->rx_page.pagecnt_bias);
+ memset(&q->rx_page, 0, sizeof(q->rx_page));
+}
+
+static void mt76u_free_rx(struct mt76_dev *dev)
+{
+ int i;
+
+ mt76_worker_teardown(&dev->usb.rx_worker);
+
+ mt76_for_each_q_rx(dev, i)
+ mt76u_free_rx_queue(dev, &dev->q_rx[i]);
+}
+
+void mt76u_stop_rx(struct mt76_dev *dev)
+{
+ int i;
+
+ mt76_worker_disable(&dev->usb.rx_worker);
+
+ mt76_for_each_q_rx(dev, i) {
+ struct mt76_queue *q = &dev->q_rx[i];
+ int j;
+
+ for (j = 0; j < q->ndesc; j++)
+ usb_poison_urb(q->entry[j].urb);
+ }
+}
+EXPORT_SYMBOL_GPL(mt76u_stop_rx);
+
+int mt76u_resume_rx(struct mt76_dev *dev)
+{
+ int i;
+
+ mt76_for_each_q_rx(dev, i) {
+ struct mt76_queue *q = &dev->q_rx[i];
+ int err, j;
+
+ for (j = 0; j < q->ndesc; j++)
+ usb_unpoison_urb(q->entry[j].urb);
+
+ err = mt76u_submit_rx_buffers(dev, i);
+ if (err < 0)
+ return err;
+ }
+
+ mt76_worker_enable(&dev->usb.rx_worker);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mt76u_resume_rx);
+
+static void mt76u_status_worker(struct mt76_worker *w)
+{
+ struct mt76_usb *usb = container_of(w, struct mt76_usb, status_worker);
+ struct mt76_dev *dev = container_of(usb, struct mt76_dev, usb);
+ struct mt76_queue_entry entry;
+ struct mt76_queue *q;
+ int i;
+
+ for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+ q = dev->phy.q_tx[i];
+ if (!q)
+ continue;
+
+ while (q->queued > 0) {
+ if (!q->entry[q->tail].done)
+ break;
+
+ entry = q->entry[q->tail];
+ q->entry[q->tail].done = false;
+
+ mt76_queue_tx_complete(dev, q, &entry);
+ }
+
+ if (!q->queued)
+ wake_up(&dev->tx_wait);
+
+ mt76_worker_schedule(&dev->tx_worker);
+
+ if (dev->drv->tx_status_data &&
+ !test_and_set_bit(MT76_READING_STATS, &dev->phy.state))
+ queue_work(dev->wq, &dev->usb.stat_work);
+ }
+}
+
+static void mt76u_tx_status_data(struct work_struct *work)
+{
+ struct mt76_usb *usb;
+ struct mt76_dev *dev;
+ u8 update = 1;
+ u16 count = 0;
+
+ usb = container_of(work, struct mt76_usb, stat_work);
+ dev = container_of(usb, struct mt76_dev, usb);
+
+ while (true) {
+ if (test_bit(MT76_REMOVED, &dev->phy.state))
+ break;
+
+ if (!dev->drv->tx_status_data(dev, &update))
+ break;
+ count++;
+ }
+
+ if (count && test_bit(MT76_STATE_RUNNING, &dev->phy.state))
+ queue_work(dev->wq, &usb->stat_work);
+ else
+ clear_bit(MT76_READING_STATS, &dev->phy.state);
+}
+
+static void mt76u_complete_tx(struct urb *urb)
+{
+ struct mt76_dev *dev = dev_get_drvdata(&urb->dev->dev);
+ struct mt76_queue_entry *e = urb->context;
+
+ if (mt76u_urb_error(urb))
+ dev_err(dev->dev, "tx urb failed: %d\n", urb->status);
+ e->done = true;
+
+ mt76_worker_schedule(&dev->usb.status_worker);
+}
+
+static int
+mt76u_tx_setup_buffers(struct mt76_dev *dev, struct sk_buff *skb,
+ struct urb *urb)
+{
+ urb->transfer_buffer_length = skb->len;
+
+ if (!dev->usb.sg_en) {
+ urb->transfer_buffer = skb->data;
+ return 0;
+ }
+
+ sg_init_table(urb->sg, MT_TX_SG_MAX_SIZE);
+ urb->num_sgs = skb_to_sgvec(skb, urb->sg, 0, skb->len);
+ if (!urb->num_sgs)
+ return -ENOMEM;
+
+ return urb->num_sgs;
+}
+
+static int
+mt76u_tx_queue_skb(struct mt76_dev *dev, struct mt76_queue *q,
+ enum mt76_txq_id qid, struct sk_buff *skb,
+ struct mt76_wcid *wcid, struct ieee80211_sta *sta)
+{
+ struct mt76_tx_info tx_info = {
+ .skb = skb,
+ };
+ u16 idx = q->head;
+ int err;
+
+ if (q->queued == q->ndesc)
+ return -ENOSPC;
+
+ skb->prev = skb->next = NULL;
+ err = dev->drv->tx_prepare_skb(dev, NULL, qid, wcid, sta, &tx_info);
+ if (err < 0)
+ return err;
+
+ err = mt76u_tx_setup_buffers(dev, tx_info.skb, q->entry[idx].urb);
+ if (err < 0)
+ return err;
+
+ mt76u_fill_bulk_urb(dev, USB_DIR_OUT, q2ep(q->hw_idx),
+ q->entry[idx].urb, mt76u_complete_tx,
+ &q->entry[idx]);
+
+ q->head = (q->head + 1) % q->ndesc;
+ q->entry[idx].skb = tx_info.skb;
+ q->entry[idx].wcid = 0xffff;
+ q->queued++;
+
+ return idx;
+}
+
+static void mt76u_tx_kick(struct mt76_dev *dev, struct mt76_queue *q)
+{
+ struct urb *urb;
+ int err;
+
+ while (q->first != q->head) {
+ urb = q->entry[q->first].urb;
+
+ trace_submit_urb(dev, urb);
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (err < 0) {
+ if (err == -ENODEV)
+ set_bit(MT76_REMOVED, &dev->phy.state);
+ else
+ dev_err(dev->dev, "tx urb submit failed:%d\n",
+ err);
+ break;
+ }
+ q->first = (q->first + 1) % q->ndesc;
+ }
+}
+
+static u8 mt76u_ac_to_hwq(struct mt76_dev *dev, u8 ac)
+{
+ if (mt76_chip(dev) == 0x7663) {
+ static const u8 lmac_queue_map[] = {
+ /* ac to lmac mapping */
+ [IEEE80211_AC_BK] = 0,
+ [IEEE80211_AC_BE] = 1,
+ [IEEE80211_AC_VI] = 2,
+ [IEEE80211_AC_VO] = 4,
+ };
+
+ if (WARN_ON(ac >= ARRAY_SIZE(lmac_queue_map)))
+ return 1; /* BE */
+
+ return lmac_queue_map[ac];
+ }
+
+ return mt76_ac_to_hwq(ac);
+}
+
+static int mt76u_alloc_tx(struct mt76_dev *dev)
+{
+ struct mt76_queue *q;
+ int i, j, err;
+
+ for (i = 0; i <= MT_TXQ_PSD; i++) {
+ if (i >= IEEE80211_NUM_ACS) {
+ dev->phy.q_tx[i] = dev->phy.q_tx[0];
+ continue;
+ }
+
+ q = devm_kzalloc(dev->dev, sizeof(*q), GFP_KERNEL);
+ if (!q)
+ return -ENOMEM;
+
+ spin_lock_init(&q->lock);
+ q->hw_idx = mt76u_ac_to_hwq(dev, i);
+
+ dev->phy.q_tx[i] = q;
+
+ q->entry = devm_kcalloc(dev->dev,
+ MT_NUM_TX_ENTRIES, sizeof(*q->entry),
+ GFP_KERNEL);
+ if (!q->entry)
+ return -ENOMEM;
+
+ q->ndesc = MT_NUM_TX_ENTRIES;
+ for (j = 0; j < q->ndesc; j++) {
+ err = mt76u_urb_alloc(dev, &q->entry[j],
+ MT_TX_SG_MAX_SIZE);
+ if (err < 0)
+ return err;
+ }
+ }
+ return 0;
+}
+
+static void mt76u_free_tx(struct mt76_dev *dev)
+{
+ int i;
+
+ mt76_worker_teardown(&dev->usb.status_worker);
+
+ for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+ struct mt76_queue *q;
+ int j;
+
+ q = dev->phy.q_tx[i];
+ if (!q)
+ continue;
+
+ for (j = 0; j < q->ndesc; j++) {
+ usb_free_urb(q->entry[j].urb);
+ q->entry[j].urb = NULL;
+ }
+ }
+}
+
+void mt76u_stop_tx(struct mt76_dev *dev)
+{
+ int ret;
+
+ mt76_worker_disable(&dev->usb.status_worker);
+
+ ret = wait_event_timeout(dev->tx_wait, !mt76_has_tx_pending(&dev->phy),
+ HZ / 5);
+ if (!ret) {
+ struct mt76_queue_entry entry;
+ struct mt76_queue *q;
+ int i, j;
+
+ dev_err(dev->dev, "timed out waiting for pending tx\n");
+
+ for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+ q = dev->phy.q_tx[i];
+ if (!q)
+ continue;
+
+ for (j = 0; j < q->ndesc; j++)
+ usb_kill_urb(q->entry[j].urb);
+ }
+
+ mt76_worker_disable(&dev->tx_worker);
+
+ /* On device removal we maight queue skb's, but mt76u_tx_kick()
+ * will fail to submit urb, cleanup those skb's manually.
+ */
+ for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+ q = dev->phy.q_tx[i];
+ if (!q)
+ continue;
+
+ while (q->queued > 0) {
+ entry = q->entry[q->tail];
+ q->entry[q->tail].done = false;
+ mt76_queue_tx_complete(dev, q, &entry);
+ }
+ }
+
+ mt76_worker_enable(&dev->tx_worker);
+ }
+
+ cancel_work_sync(&dev->usb.stat_work);
+ clear_bit(MT76_READING_STATS, &dev->phy.state);
+
+ mt76_worker_enable(&dev->usb.status_worker);
+
+ mt76_tx_status_check(dev, true);
+}
+EXPORT_SYMBOL_GPL(mt76u_stop_tx);
+
+void mt76u_queues_deinit(struct mt76_dev *dev)
+{
+ mt76u_stop_rx(dev);
+ mt76u_stop_tx(dev);
+
+ mt76u_free_rx(dev);
+ mt76u_free_tx(dev);
+}
+EXPORT_SYMBOL_GPL(mt76u_queues_deinit);
+
+int mt76u_alloc_queues(struct mt76_dev *dev)
+{
+ int err;
+
+ err = mt76u_alloc_rx_queue(dev, MT_RXQ_MAIN);
+ if (err < 0)
+ return err;
+
+ return mt76u_alloc_tx(dev);
+}
+EXPORT_SYMBOL_GPL(mt76u_alloc_queues);
+
+static const struct mt76_queue_ops usb_queue_ops = {
+ .tx_queue_skb = mt76u_tx_queue_skb,
+ .kick = mt76u_tx_kick,
+};
+
+int __mt76u_init(struct mt76_dev *dev, struct usb_interface *intf,
+ struct mt76_bus_ops *ops)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ struct mt76_usb *usb = &dev->usb;
+ int err;
+
+ INIT_WORK(&usb->stat_work, mt76u_tx_status_data);
+
+ usb->data_len = usb_maxpacket(udev, usb_sndctrlpipe(udev, 0), 1);
+ if (usb->data_len < 32)
+ usb->data_len = 32;
+
+ usb->data = devm_kmalloc(dev->dev, usb->data_len, GFP_KERNEL);
+ if (!usb->data)
+ return -ENOMEM;
+
+ mutex_init(&usb->usb_ctrl_mtx);
+ dev->bus = ops;
+ dev->queue_ops = &usb_queue_ops;
+
+ dev_set_drvdata(&udev->dev, dev);
+
+ usb->sg_en = mt76u_check_sg(dev);
+
+ err = mt76u_set_endpoints(intf, usb);
+ if (err < 0)
+ return err;
+
+ err = mt76_worker_setup(dev->hw, &usb->rx_worker, mt76u_rx_worker,
+ "usb-rx");
+ if (err)
+ return err;
+
+ err = mt76_worker_setup(dev->hw, &usb->status_worker,
+ mt76u_status_worker, "usb-status");
+ if (err)
+ return err;
+
+ sched_set_fifo_low(usb->rx_worker.task);
+ sched_set_fifo_low(usb->status_worker.task);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(__mt76u_init);
+
+int mt76u_init(struct mt76_dev *dev, struct usb_interface *intf)
+{
+ static struct mt76_bus_ops bus_ops = {
+ .rr = mt76u_rr,
+ .wr = mt76u_wr,
+ .rmw = mt76u_rmw,
+ .read_copy = mt76u_read_copy,
+ .write_copy = mt76u_copy,
+ .wr_rp = mt76u_wr_rp,
+ .rd_rp = mt76u_rd_rp,
+ .type = MT76_BUS_USB,
+ };
+
+ return __mt76u_init(dev, intf, &bus_ops);
+}
+EXPORT_SYMBOL_GPL(mt76u_init);
+
+MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>");
+MODULE_LICENSE("Dual BSD/GPL");