/**
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* aicwf_bus.c
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*
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* bus function declarations
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*
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* Copyright (C) AICSemi 2018-2020
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*/
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#include <linux/kthread.h>
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#include <linux/netdevice.h>
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#include <linux/printk.h>
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#include <linux/interrupt.h>
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#include <linux/sched.h>
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#include <linux/completion.h>
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#include <linux/semaphore.h>
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#include <linux/debugfs.h>
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#include <linux/atomic.h>
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#include <linux/vmalloc.h>
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#include "aicsdio_txrxif.h"
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#include "aic_bsp_driver.h"
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int aicwf_bus_init(uint bus_hdrlen, struct device *dev)
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{
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int ret = 0;
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struct aicwf_bus *bus_if;
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if (!dev) {
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txrx_err("device not found\n");
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return -1;
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}
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bus_if = dev_get_drvdata(dev);
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bus_if->cmd_buf = kzalloc(CMD_BUF_MAX, GFP_KERNEL);
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if (!bus_if->cmd_buf) {
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ret = -ENOMEM;
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txrx_err("proto_attach failed\n");
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goto fail;
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}
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memset(bus_if->cmd_buf, '\0', CMD_BUF_MAX);
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init_completion(&bus_if->bustx_trgg);
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init_completion(&bus_if->busrx_trgg);
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#ifdef AICWF_SDIO_SUPPORT
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bus_if->bustx_thread = kthread_run(aicwf_sdio_bustx_thread, (void *)bus_if, "aicwf_bustx_thread");
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bus_if->busrx_thread = kthread_run(aicwf_sdio_busrx_thread, (void *)bus_if->bus_priv.sdio->rx_priv, "aicwf_busrx_thread");
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#endif
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if (IS_ERR(bus_if->bustx_thread)) {
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bus_if->bustx_thread = NULL;
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txrx_err("aicwf_bustx_thread run fail\n");
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goto fail;
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}
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if (IS_ERR(bus_if->busrx_thread)) {
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bus_if->busrx_thread = NULL;
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txrx_err("aicwf_bustx_thread run fail\n");
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goto fail;
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}
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return ret;
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fail:
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aicwf_bus_deinit(dev);
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return ret;
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}
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void aicwf_bus_deinit(struct device *dev)
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{
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struct aicwf_bus *bus_if;
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struct aic_sdio_dev *sdiodev;
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if (!dev) {
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txrx_err("device not found\n");
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return;
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}
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sdio_dbg("%s", __func__);
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bus_if = aicbsp_get_drvdata(dev);
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aicwf_bus_stop(bus_if);
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sdiodev = bus_if->bus_priv.sdio;
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if (bus_if->cmd_buf) {
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kfree(bus_if->cmd_buf);
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bus_if->cmd_buf = NULL;
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}
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if (bus_if->bustx_thread) {
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complete_all(&bus_if->bustx_trgg);
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kthread_stop(bus_if->bustx_thread);
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bus_if->bustx_thread = NULL;
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}
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}
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void aicwf_frame_tx(void *dev, struct sk_buff *skb)
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{
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struct aic_sdio_dev *sdiodev = (struct aic_sdio_dev *)dev;
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aicwf_bus_txdata(sdiodev->bus_if, skb);
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}
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struct aicwf_tx_priv *aicwf_tx_init(void *arg)
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{
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struct aicwf_tx_priv *tx_priv;
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tx_priv = kzalloc(sizeof(struct aicwf_tx_priv), GFP_KERNEL);
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if (!tx_priv)
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return NULL;
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tx_priv->sdiodev = (struct aic_sdio_dev *)arg;
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atomic_set(&tx_priv->aggr_count, 0);
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tx_priv->aggr_buf = dev_alloc_skb(MAX_AGGR_TXPKT_LEN);
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if (!tx_priv->aggr_buf) {
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txrx_err("Alloc bus->txdata_buf failed!\n");
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kfree(tx_priv);
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return NULL;
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}
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tx_priv->head = tx_priv->aggr_buf->data;
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tx_priv->tail = tx_priv->aggr_buf->data;
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return tx_priv;
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}
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void aicwf_tx_deinit(struct aicwf_tx_priv *tx_priv)
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{
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if (tx_priv && tx_priv->aggr_buf)
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dev_kfree_skb(tx_priv->aggr_buf);
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kfree(tx_priv);
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//tx_priv = NULL;
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}
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static bool aicwf_another_ptk(struct sk_buff *skb)
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{
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u8 *data;
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u16 aggr_len = 0;
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if (skb->data == NULL || skb->len == 0) {
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return false;
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}
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data = skb->data;
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aggr_len = (*skb->data | (*(skb->data + 1) << 8));
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if (aggr_len == 0) {
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return false;
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}
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return true;
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}
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int aicwf_process_rxframes(struct aicwf_rx_priv *rx_priv)
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{
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int ret = 0;
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unsigned long flags = 0;
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struct sk_buff *skb = NULL;
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u16 pkt_len = 0;
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struct sk_buff *skb_inblock = NULL;
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u16 aggr_len = 0, adjust_len = 0;
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u8 *data = NULL;
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while (1) {
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spin_lock_irqsave(&rx_priv->rxqlock, flags);
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if (aicwf_is_framequeue_empty(&rx_priv->rxq)) {
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spin_unlock_irqrestore(&rx_priv->rxqlock, flags);
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break;
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}
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skb = aicwf_frame_dequeue(&rx_priv->rxq);
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spin_unlock_irqrestore(&rx_priv->rxqlock, flags);
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if (skb == NULL) {
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txrx_err("skb_error\r\n");
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break;
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}
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while (aicwf_another_ptk(skb)) {
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data = skb->data;
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pkt_len = (*skb->data | (*(skb->data + 1) << 8));
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if ((skb->data[2] & SDIO_TYPE_CFG) != SDIO_TYPE_CFG) { // type : data
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aggr_len = pkt_len + RX_HWHRD_LEN;
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if (aggr_len & (RX_ALIGNMENT - 1))
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adjust_len = roundup(aggr_len, RX_ALIGNMENT);
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else
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adjust_len = aggr_len;
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skb_inblock = __dev_alloc_skb(aggr_len + CCMP_OR_WEP_INFO, GFP_KERNEL);//8 is for ccmp mic or wep icv
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if (skb_inblock == NULL) {
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txrx_err("no more space!\n");
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aicwf_dev_skb_free(skb);
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return -EBADE;
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}
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skb_put(skb_inblock, aggr_len);
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memcpy(skb_inblock->data, data, aggr_len);
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#if 0
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rwnx_rxdataind_aicwf(rx_priv->sdiodev->rwnx_hw, skb_inblock, (void *)rx_priv);
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#endif
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skb_pull(skb, adjust_len);
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} else { // type : config
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aggr_len = pkt_len;
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if (aggr_len & (RX_ALIGNMENT - 1))
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adjust_len = roundup(aggr_len, RX_ALIGNMENT);
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else
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adjust_len = aggr_len;
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skb_inblock = __dev_alloc_skb(aggr_len+4, GFP_KERNEL);
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if (skb_inblock == NULL) {
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txrx_err("no more space!\n");
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aicwf_dev_skb_free(skb);
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return -EBADE;
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}
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skb_put(skb_inblock, aggr_len+4);
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memcpy(skb_inblock->data, data, aggr_len+4);
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if ((*(skb_inblock->data + 2) & 0x7f) == SDIO_TYPE_CFG_CMD_RSP)
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rwnx_rx_handle_msg(rx_priv->sdiodev, (struct ipc_e2a_msg *)(skb_inblock->data + 4));
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#if 0
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if ((*(skb_inblock->data + 2) & 0x7f) == SDIO_TYPE_CFG_DATA_CFM)
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aicwf_sdio_host_tx_cfm_handler(&(rx_priv->sdiodev->rwnx_hw->sdio_env), (u32 *)(skb_inblock->data + 4));
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#endif
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skb_pull(skb, adjust_len+4);
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}
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}
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/* skb_inblock no used currently, just free it! */
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dev_kfree_skb(skb_inblock);
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dev_kfree_skb(skb);
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atomic_dec(&rx_priv->rx_cnt);
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}
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#if defined(CONFIG_SDIO_PWRCTRL)
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aicwf_sdio_pwr_stctl(rx_priv->sdiodev, SDIO_ACTIVE_ST);
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#endif
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return ret;
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}
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static struct recv_msdu *aicwf_rxframe_queue_init(struct list_head *q, int qsize)
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{
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int i;
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struct recv_msdu *req, *reqs;
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reqs = vmalloc(qsize*sizeof(struct recv_msdu));
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if (reqs == NULL)
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return NULL;
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req = reqs;
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for (i = 0; i < qsize; i++) {
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INIT_LIST_HEAD(&req->rxframe_list);
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list_add(&req->rxframe_list, q);
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req->len = 0;
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req++;
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}
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return reqs;
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}
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struct aicwf_rx_priv *aicwf_rx_init(void *arg)
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{
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struct aicwf_rx_priv *rx_priv;
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rx_priv = kzalloc(sizeof(struct aicwf_rx_priv), GFP_KERNEL);
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if (!rx_priv)
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return NULL;
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rx_priv->sdiodev = (struct aic_sdio_dev *)arg;
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aicwf_frame_queue_init(&rx_priv->rxq, 1, MAX_RXQLEN);
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spin_lock_init(&rx_priv->rxqlock);
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atomic_set(&rx_priv->rx_cnt, 0);
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INIT_LIST_HEAD(&rx_priv->rxframes_freequeue);
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spin_lock_init(&rx_priv->freeq_lock);
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rx_priv->recv_frames = aicwf_rxframe_queue_init(&rx_priv->rxframes_freequeue, MAX_REORD_RXFRAME);
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if (!rx_priv->recv_frames) {
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txrx_err("no enough buffer for free recv frame queue!\n");
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kfree(rx_priv);
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return NULL;
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}
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spin_lock_init(&rx_priv->stas_reord_lock);
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INIT_LIST_HEAD(&rx_priv->stas_reord_list);
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return rx_priv;
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}
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static void aicwf_recvframe_queue_deinit(struct list_head *q)
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{
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struct recv_msdu *req, *next;
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list_for_each_entry_safe(req, next, q, rxframe_list) {
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list_del_init(&req->rxframe_list);
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}
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}
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void aicwf_rx_deinit(struct aicwf_rx_priv *rx_priv)
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{
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if (rx_priv->sdiodev->bus_if->busrx_thread) {
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complete_all(&rx_priv->sdiodev->bus_if->busrx_trgg);
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kthread_stop(rx_priv->sdiodev->bus_if->busrx_thread);
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rx_priv->sdiodev->bus_if->busrx_thread = NULL;
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}
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aicwf_frame_queue_flush(&rx_priv->rxq);
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aicwf_recvframe_queue_deinit(&rx_priv->rxframes_freequeue);
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if (rx_priv->recv_frames)
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vfree(rx_priv->recv_frames);
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kfree(rx_priv);
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//rx_priv = NULL;
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}
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bool aicwf_rxframe_enqueue(struct device *dev, struct frame_queue *q, struct sk_buff *pkt)
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{
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return aicwf_frame_enq(dev, q, pkt, 0);
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}
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void aicwf_dev_skb_free(struct sk_buff *skb)
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{
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if (!skb)
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return;
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dev_kfree_skb_any(skb);
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}
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static struct sk_buff *aicwf_frame_queue_penq(struct frame_queue *pq, int prio, struct sk_buff *p)
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{
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struct sk_buff_head *q;
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if (pq->queuelist[prio].qlen >= pq->qmax)
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return NULL;
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q = &pq->queuelist[prio];
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__skb_queue_tail(q, p);
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pq->qcnt++;
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if (pq->hi_prio < prio)
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pq->hi_prio = (u16)prio;
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return p;
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}
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void aicwf_frame_queue_flush(struct frame_queue *pq)
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{
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int prio;
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struct sk_buff_head *q;
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struct sk_buff *p, *next;
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for (prio = 0; prio < pq->num_prio; prio++) {
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q = &pq->queuelist[prio];
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skb_queue_walk_safe(q, p, next) {
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skb_unlink(p, q);
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aicwf_dev_skb_free(p);
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pq->qcnt--;
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}
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}
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}
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void aicwf_frame_queue_init(struct frame_queue *pq, int num_prio, int max_len)
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{
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int prio;
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memset(pq, 0, offsetof(struct frame_queue, queuelist) + (sizeof(struct sk_buff_head) * num_prio));
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pq->num_prio = (u16)num_prio;
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pq->qmax = (u16)max_len;
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for (prio = 0; prio < num_prio; prio++) {
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skb_queue_head_init(&pq->queuelist[prio]);
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}
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}
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struct sk_buff *aicwf_frame_queue_peek_tail(struct frame_queue *pq, int *prio_out)
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{
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int prio;
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if (pq->qcnt == 0)
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return NULL;
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for (prio = 0; prio < pq->hi_prio; prio++)
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if (!skb_queue_empty(&pq->queuelist[prio]))
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break;
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if (prio_out)
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*prio_out = prio;
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return skb_peek_tail(&pq->queuelist[prio]);
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}
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bool aicwf_is_framequeue_empty(struct frame_queue *pq)
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{
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int prio, len = 0;
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for (prio = 0; prio <= pq->hi_prio; prio++)
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len += pq->queuelist[prio].qlen;
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if (len > 0)
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return false;
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else
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return true;
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}
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struct sk_buff *aicwf_frame_dequeue(struct frame_queue *pq)
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{
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struct sk_buff_head *q;
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struct sk_buff *p;
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int prio;
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if (pq->qcnt == 0)
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return NULL;
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while ((prio = pq->hi_prio) > 0 && skb_queue_empty(&pq->queuelist[prio]))
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pq->hi_prio--;
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q = &pq->queuelist[prio];
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p = __skb_dequeue(q);
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if (p == NULL)
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return NULL;
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pq->qcnt--;
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return p;
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}
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static struct sk_buff *aicwf_skb_dequeue_tail(struct frame_queue *pq, int prio)
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{
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struct sk_buff_head *q = &pq->queuelist[prio];
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struct sk_buff *p = skb_dequeue_tail(q);
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if (!p)
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return NULL;
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pq->qcnt--;
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return p;
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}
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bool aicwf_frame_enq(struct device *dev, struct frame_queue *q, struct sk_buff *pkt, int prio)
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{
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struct sk_buff *p = NULL;
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int prio_modified = -1;
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if (q->queuelist[prio].qlen < q->qmax && q->qcnt < q->qmax) {
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aicwf_frame_queue_penq(q, prio, pkt);
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return true;
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}
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if (q->queuelist[prio].qlen >= q->qmax) {
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prio_modified = prio;
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} else if (q->qcnt >= q->qmax) {
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p = aicwf_frame_queue_peek_tail(q, &prio_modified);
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if (prio_modified > prio)
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return false;
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}
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if (prio_modified >= 0) {
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if (prio_modified == prio)
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return false;
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p = aicwf_skb_dequeue_tail(q, prio_modified);
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aicwf_dev_skb_free(p);
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p = aicwf_frame_queue_penq(q, prio_modified, pkt);
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if (p == NULL)
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txrx_err("failed\n");
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}
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return p != NULL;
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}
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