392 lines
12 KiB
C
392 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Handling of the chip-to-host events (aka indications) of the hardware API.
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*
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* Copyright (c) 2017-2020, Silicon Laboratories, Inc.
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* Copyright (c) 2010, ST-Ericsson
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*/
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#include <linux/skbuff.h>
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#include <linux/etherdevice.h>
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#include "hif_rx.h"
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#include "wfx.h"
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#include "scan.h"
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#include "bh.h"
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#include "sta.h"
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#include "data_rx.h"
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#include "hif_api_cmd.h"
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static int wfx_hif_generic_confirm(struct wfx_dev *wdev,
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const struct wfx_hif_msg *hif, const void *buf)
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{
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/* All confirm messages start with status */
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int status = le32_to_cpup((__le32 *)buf);
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int cmd = hif->id;
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int len = le16_to_cpu(hif->len) - 4; /* drop header */
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WARN(!mutex_is_locked(&wdev->hif_cmd.lock), "data locking error");
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if (!wdev->hif_cmd.buf_send) {
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dev_warn(wdev->dev, "unexpected confirmation: 0x%.2x\n", cmd);
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return -EINVAL;
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}
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if (cmd != wdev->hif_cmd.buf_send->id) {
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dev_warn(wdev->dev, "chip response mismatch request: 0x%.2x vs 0x%.2x\n",
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cmd, wdev->hif_cmd.buf_send->id);
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return -EINVAL;
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}
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if (wdev->hif_cmd.buf_recv) {
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if (wdev->hif_cmd.len_recv >= len && len > 0)
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memcpy(wdev->hif_cmd.buf_recv, buf, len);
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else
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status = -EIO;
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}
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wdev->hif_cmd.ret = status;
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complete(&wdev->hif_cmd.done);
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return status;
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}
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static int wfx_hif_tx_confirm(struct wfx_dev *wdev,
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const struct wfx_hif_msg *hif, const void *buf)
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{
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const struct wfx_hif_cnf_tx *body = buf;
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wfx_tx_confirm_cb(wdev, body);
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return 0;
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}
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static int wfx_hif_multi_tx_confirm(struct wfx_dev *wdev,
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const struct wfx_hif_msg *hif, const void *buf)
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{
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const struct wfx_hif_cnf_multi_transmit *body = buf;
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int i;
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WARN(body->num_tx_confs <= 0, "corrupted message");
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for (i = 0; i < body->num_tx_confs; i++)
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wfx_tx_confirm_cb(wdev, &body->tx_conf_payload[i]);
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return 0;
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}
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static int wfx_hif_startup_indication(struct wfx_dev *wdev,
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const struct wfx_hif_msg *hif, const void *buf)
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{
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const struct wfx_hif_ind_startup *body = buf;
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if (body->status || body->firmware_type > 4) {
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dev_err(wdev->dev, "received invalid startup indication");
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return -EINVAL;
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}
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memcpy(&wdev->hw_caps, body, sizeof(struct wfx_hif_ind_startup));
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complete(&wdev->firmware_ready);
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return 0;
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}
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static int wfx_hif_wakeup_indication(struct wfx_dev *wdev,
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const struct wfx_hif_msg *hif, const void *buf)
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{
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if (!wdev->pdata.gpio_wakeup || gpiod_get_value(wdev->pdata.gpio_wakeup) == 0) {
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dev_warn(wdev->dev, "unexpected wake-up indication\n");
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return -EIO;
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}
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return 0;
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}
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static int wfx_hif_receive_indication(struct wfx_dev *wdev, const struct wfx_hif_msg *hif,
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const void *buf, struct sk_buff *skb)
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{
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struct wfx_vif *wvif = wdev_to_wvif(wdev, hif->interface);
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const struct wfx_hif_ind_rx *body = buf;
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if (!wvif) {
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dev_warn(wdev->dev, "%s: received event for non-existent vif\n", __func__);
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return -EIO;
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}
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skb_pull(skb, sizeof(struct wfx_hif_msg) + sizeof(struct wfx_hif_ind_rx));
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wfx_rx_cb(wvif, body, skb);
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return 0;
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}
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static int wfx_hif_event_indication(struct wfx_dev *wdev,
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const struct wfx_hif_msg *hif, const void *buf)
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{
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struct wfx_vif *wvif = wdev_to_wvif(wdev, hif->interface);
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const struct wfx_hif_ind_event *body = buf;
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int type = le32_to_cpu(body->event_id);
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if (!wvif) {
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dev_warn(wdev->dev, "%s: received event for non-existent vif\n", __func__);
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return -EIO;
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}
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switch (type) {
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case HIF_EVENT_IND_RCPI_RSSI:
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wfx_event_report_rssi(wvif, body->event_data.rcpi_rssi);
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break;
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case HIF_EVENT_IND_BSSLOST:
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schedule_delayed_work(&wvif->beacon_loss_work, 0);
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break;
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case HIF_EVENT_IND_BSSREGAINED:
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cancel_delayed_work(&wvif->beacon_loss_work);
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dev_dbg(wdev->dev, "ignore BSSREGAINED indication\n");
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break;
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case HIF_EVENT_IND_PS_MODE_ERROR:
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dev_warn(wdev->dev, "error while processing power save request: %d\n",
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le32_to_cpu(body->event_data.ps_mode_error));
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break;
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default:
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dev_warn(wdev->dev, "unhandled event indication: %.2x\n", type);
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break;
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}
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return 0;
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}
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static int wfx_hif_pm_mode_complete_indication(struct wfx_dev *wdev,
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const struct wfx_hif_msg *hif, const void *buf)
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{
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struct wfx_vif *wvif = wdev_to_wvif(wdev, hif->interface);
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if (!wvif) {
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dev_warn(wdev->dev, "%s: received event for non-existent vif\n", __func__);
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return -EIO;
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}
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complete(&wvif->set_pm_mode_complete);
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return 0;
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}
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static int wfx_hif_scan_complete_indication(struct wfx_dev *wdev,
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const struct wfx_hif_msg *hif, const void *buf)
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{
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struct wfx_vif *wvif = wdev_to_wvif(wdev, hif->interface);
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const struct wfx_hif_ind_scan_cmpl *body = buf;
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if (!wvif) {
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dev_warn(wdev->dev, "%s: received event for non-existent vif\n", __func__);
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return -EIO;
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}
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wfx_scan_complete(wvif, body->num_channels_completed);
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return 0;
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}
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static int wfx_hif_join_complete_indication(struct wfx_dev *wdev,
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const struct wfx_hif_msg *hif, const void *buf)
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{
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struct wfx_vif *wvif = wdev_to_wvif(wdev, hif->interface);
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if (!wvif) {
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dev_warn(wdev->dev, "%s: received event for non-existent vif\n", __func__);
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return -EIO;
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}
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dev_warn(wdev->dev, "unattended JoinCompleteInd\n");
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return 0;
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}
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static int wfx_hif_suspend_resume_indication(struct wfx_dev *wdev,
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const struct wfx_hif_msg *hif, const void *buf)
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{
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const struct wfx_hif_ind_suspend_resume_tx *body = buf;
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struct wfx_vif *wvif;
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if (body->bc_mc_only) {
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wvif = wdev_to_wvif(wdev, hif->interface);
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if (!wvif) {
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dev_warn(wdev->dev, "%s: received event for non-existent vif\n", __func__);
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return -EIO;
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}
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if (body->resume)
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wfx_suspend_resume_mc(wvif, STA_NOTIFY_AWAKE);
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else
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wfx_suspend_resume_mc(wvif, STA_NOTIFY_SLEEP);
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} else {
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WARN(body->peer_sta_set, "misunderstood indication");
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WARN(hif->interface != 2, "misunderstood indication");
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if (body->resume)
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wfx_suspend_hot_dev(wdev, STA_NOTIFY_AWAKE);
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else
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wfx_suspend_hot_dev(wdev, STA_NOTIFY_SLEEP);
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}
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return 0;
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}
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static int wfx_hif_generic_indication(struct wfx_dev *wdev,
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const struct wfx_hif_msg *hif, const void *buf)
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{
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const struct wfx_hif_ind_generic *body = buf;
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int type = le32_to_cpu(body->type);
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switch (type) {
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case HIF_GENERIC_INDICATION_TYPE_RAW:
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return 0;
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case HIF_GENERIC_INDICATION_TYPE_STRING:
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dev_info(wdev->dev, "firmware says: %s\n", (char *)&body->data);
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return 0;
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case HIF_GENERIC_INDICATION_TYPE_RX_STATS:
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mutex_lock(&wdev->rx_stats_lock);
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/* Older firmware send a generic indication beside RxStats */
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if (!wfx_api_older_than(wdev, 1, 4))
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dev_info(wdev->dev, "Rx test ongoing. Temperature: %d degrees C\n",
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body->data.rx_stats.current_temp);
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memcpy(&wdev->rx_stats, &body->data.rx_stats, sizeof(wdev->rx_stats));
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mutex_unlock(&wdev->rx_stats_lock);
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return 0;
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case HIF_GENERIC_INDICATION_TYPE_TX_POWER_LOOP_INFO:
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mutex_lock(&wdev->tx_power_loop_info_lock);
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memcpy(&wdev->tx_power_loop_info, &body->data.tx_power_loop_info,
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sizeof(wdev->tx_power_loop_info));
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mutex_unlock(&wdev->tx_power_loop_info_lock);
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return 0;
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default:
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dev_err(wdev->dev, "generic_indication: unknown indication type: %#.8x\n", type);
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return -EIO;
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}
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}
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static const struct {
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int val;
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const char *str;
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bool has_param;
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} hif_errors[] = {
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{ HIF_ERROR_FIRMWARE_ROLLBACK,
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"rollback status" },
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{ HIF_ERROR_FIRMWARE_DEBUG_ENABLED,
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"debug feature enabled" },
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{ HIF_ERROR_PDS_PAYLOAD,
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"PDS version is not supported" },
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{ HIF_ERROR_PDS_TESTFEATURE,
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"PDS ask for an unknown test mode" },
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{ HIF_ERROR_OOR_VOLTAGE,
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"out-of-range power supply voltage", true },
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{ HIF_ERROR_OOR_TEMPERATURE,
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"out-of-range temperature", true },
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{ HIF_ERROR_SLK_REQ_DURING_KEY_EXCHANGE,
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"secure link does not expect request during key exchange" },
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{ HIF_ERROR_SLK_SESSION_KEY,
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"secure link session key is invalid" },
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{ HIF_ERROR_SLK_OVERFLOW,
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"secure link overflow" },
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{ HIF_ERROR_SLK_WRONG_ENCRYPTION_STATE,
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"secure link messages list does not match message encryption" },
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{ HIF_ERROR_SLK_UNCONFIGURED,
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"secure link not yet configured" },
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{ HIF_ERROR_HIF_BUS_FREQUENCY_TOO_LOW,
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"bus clock is too slow (<1kHz)" },
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{ HIF_ERROR_HIF_RX_DATA_TOO_LARGE,
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"HIF message too large" },
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/* Following errors only exists in old firmware versions: */
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{ HIF_ERROR_HIF_TX_QUEUE_FULL,
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"HIF messages queue is full" },
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{ HIF_ERROR_HIF_BUS,
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"HIF bus" },
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{ HIF_ERROR_SLK_MULTI_TX_UNSUPPORTED,
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"secure link does not support multi-tx confirmations" },
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{ HIF_ERROR_SLK_OUTDATED_SESSION_KEY,
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"secure link session key is outdated" },
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{ HIF_ERROR_SLK_DECRYPTION,
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"secure link params (nonce or tag) mismatch" },
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};
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static int wfx_hif_error_indication(struct wfx_dev *wdev,
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const struct wfx_hif_msg *hif, const void *buf)
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{
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const struct wfx_hif_ind_error *body = buf;
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int type = le32_to_cpu(body->type);
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int param = (s8)body->data[0];
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int i;
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for (i = 0; i < ARRAY_SIZE(hif_errors); i++)
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if (type == hif_errors[i].val)
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break;
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if (i < ARRAY_SIZE(hif_errors))
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if (hif_errors[i].has_param)
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dev_err(wdev->dev, "asynchronous error: %s: %d\n",
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hif_errors[i].str, param);
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else
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dev_err(wdev->dev, "asynchronous error: %s\n", hif_errors[i].str);
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else
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dev_err(wdev->dev, "asynchronous error: unknown: %08x\n", type);
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print_hex_dump(KERN_INFO, "hif: ", DUMP_PREFIX_OFFSET,
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16, 1, hif, le16_to_cpu(hif->len), false);
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wdev->chip_frozen = true;
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return 0;
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};
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static int wfx_hif_exception_indication(struct wfx_dev *wdev,
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const struct wfx_hif_msg *hif, const void *buf)
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{
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const struct wfx_hif_ind_exception *body = buf;
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int type = le32_to_cpu(body->type);
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if (type == 4)
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dev_err(wdev->dev, "firmware assert %d\n", le32_to_cpup((__le32 *)body->data));
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else
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dev_err(wdev->dev, "firmware exception\n");
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print_hex_dump(KERN_INFO, "hif: ", DUMP_PREFIX_OFFSET,
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16, 1, hif, le16_to_cpu(hif->len), false);
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wdev->chip_frozen = true;
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return -1;
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}
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static const struct {
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int msg_id;
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int (*handler)(struct wfx_dev *wdev, const struct wfx_hif_msg *hif, const void *buf);
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} hif_handlers[] = {
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/* Confirmations */
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{ HIF_CNF_ID_TX, wfx_hif_tx_confirm },
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{ HIF_CNF_ID_MULTI_TRANSMIT, wfx_hif_multi_tx_confirm },
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/* Indications */
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{ HIF_IND_ID_STARTUP, wfx_hif_startup_indication },
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{ HIF_IND_ID_WAKEUP, wfx_hif_wakeup_indication },
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{ HIF_IND_ID_JOIN_COMPLETE, wfx_hif_join_complete_indication },
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{ HIF_IND_ID_SET_PM_MODE_CMPL, wfx_hif_pm_mode_complete_indication },
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{ HIF_IND_ID_SCAN_CMPL, wfx_hif_scan_complete_indication },
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{ HIF_IND_ID_SUSPEND_RESUME_TX, wfx_hif_suspend_resume_indication },
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{ HIF_IND_ID_EVENT, wfx_hif_event_indication },
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{ HIF_IND_ID_GENERIC, wfx_hif_generic_indication },
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{ HIF_IND_ID_ERROR, wfx_hif_error_indication },
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{ HIF_IND_ID_EXCEPTION, wfx_hif_exception_indication },
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/* FIXME: allocate skb_p from wfx_hif_receive_indication and make it generic */
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//{ HIF_IND_ID_RX, wfx_hif_receive_indication },
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};
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void wfx_handle_rx(struct wfx_dev *wdev, struct sk_buff *skb)
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{
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int i;
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const struct wfx_hif_msg *hif = (const struct wfx_hif_msg *)skb->data;
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int hif_id = hif->id;
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if (hif_id == HIF_IND_ID_RX) {
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/* wfx_hif_receive_indication take care of skb lifetime */
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wfx_hif_receive_indication(wdev, hif, hif->body, skb);
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return;
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}
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/* Note: mutex_is_lock cause an implicit memory barrier that protect buf_send */
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if (mutex_is_locked(&wdev->hif_cmd.lock) &&
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wdev->hif_cmd.buf_send && wdev->hif_cmd.buf_send->id == hif_id) {
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wfx_hif_generic_confirm(wdev, hif, hif->body);
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goto free;
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}
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for (i = 0; i < ARRAY_SIZE(hif_handlers); i++) {
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if (hif_handlers[i].msg_id == hif_id) {
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if (hif_handlers[i].handler)
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hif_handlers[i].handler(wdev, hif, hif->body);
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goto free;
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}
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}
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if (hif_id & HIF_ID_IS_INDICATION)
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dev_err(wdev->dev, "unsupported HIF indication: ID %02x\n", hif_id);
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else
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dev_err(wdev->dev, "unexpected HIF confirmation: ID %02x\n", hif_id);
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free:
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dev_kfree_skb(skb);
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}
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