diff options
Diffstat (limited to 'drivers/staging/wfx/hif_tx.c')
| -rw-r--r-- | drivers/staging/wfx/hif_tx.c | 493 |
1 files changed, 493 insertions, 0 deletions
diff --git a/drivers/staging/wfx/hif_tx.c b/drivers/staging/wfx/hif_tx.c new file mode 100644 index 000000000000..cb7cddcb9815 --- /dev/null +++ b/drivers/staging/wfx/hif_tx.c @@ -0,0 +1,493 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Implementation of host-to-chip commands (aka request/confirmation) of WFxxx + * Split Mac (WSM) API. + * + * Copyright (c) 2017-2019, Silicon Laboratories, Inc. + * Copyright (c) 2010, ST-Ericsson + */ +#include <linux/skbuff.h> +#include <linux/etherdevice.h> + +#include "hif_tx.h" +#include "wfx.h" +#include "bh.h" +#include "hwio.h" +#include "debug.h" +#include "sta.h" + +void wfx_init_hif_cmd(struct wfx_hif_cmd *hif_cmd) +{ + init_completion(&hif_cmd->ready); + init_completion(&hif_cmd->done); + mutex_init(&hif_cmd->lock); + mutex_init(&hif_cmd->key_renew_lock); +} + +static void wfx_fill_header(struct hif_msg *hif, int if_id, unsigned int cmd, + size_t size) +{ + if (if_id == -1) + if_id = 2; + + WARN(cmd > 0x3f, "invalid WSM command %#.2x", cmd); + WARN(size > 0xFFF, "requested buffer is too large: %zu bytes", size); + WARN(if_id > 0x3, "invalid interface ID %d", if_id); + + hif->len = cpu_to_le16(size + 4); + hif->id = cmd; + hif->interface = if_id; +} + +static void *wfx_alloc_hif(size_t body_len, struct hif_msg **hif) +{ + *hif = kzalloc(sizeof(struct hif_msg) + body_len, GFP_KERNEL); + if (*hif) + return (*hif)->body; + else + return NULL; +} + +int wfx_cmd_send(struct wfx_dev *wdev, struct hif_msg *request, void *reply, + size_t reply_len, bool async) +{ + const char *mib_name = ""; + const char *mib_sep = ""; + int cmd = request->id; + int vif = request->interface; + int ret; + + WARN(wdev->hif_cmd.buf_recv && wdev->hif_cmd.async, "API usage error"); + + // Do not wait for any reply if chip is frozen + if (wdev->chip_frozen) + return -ETIMEDOUT; + + if (cmd != HIF_REQ_ID_SL_EXCHANGE_PUB_KEYS) + mutex_lock(&wdev->hif_cmd.key_renew_lock); + + mutex_lock(&wdev->hif_cmd.lock); + WARN(wdev->hif_cmd.buf_send, "data locking error"); + + // Note: call to complete() below has an implicit memory barrier that + // hopefully protect buf_send + wdev->hif_cmd.buf_send = request; + wdev->hif_cmd.buf_recv = reply; + wdev->hif_cmd.len_recv = reply_len; + wdev->hif_cmd.async = async; + complete(&wdev->hif_cmd.ready); + + wfx_bh_request_tx(wdev); + + // NOTE: no timeout is catched async is enabled + if (async) + return 0; + + ret = wait_for_completion_timeout(&wdev->hif_cmd.done, 1 * HZ); + if (!ret) { + dev_err(wdev->dev, "chip is abnormally long to answer\n"); + reinit_completion(&wdev->hif_cmd.ready); + ret = wait_for_completion_timeout(&wdev->hif_cmd.done, 3 * HZ); + } + if (!ret) { + dev_err(wdev->dev, "chip did not answer\n"); + wfx_pending_dump_old_frames(wdev, 3000); + wdev->chip_frozen = 1; + reinit_completion(&wdev->hif_cmd.done); + ret = -ETIMEDOUT; + } else { + ret = wdev->hif_cmd.ret; + } + + wdev->hif_cmd.buf_send = NULL; + mutex_unlock(&wdev->hif_cmd.lock); + + if (ret && + (cmd == HIF_REQ_ID_READ_MIB || cmd == HIF_REQ_ID_WRITE_MIB)) { + mib_name = get_mib_name(((u16 *) request)[2]); + mib_sep = "/"; + } + if (ret < 0) + dev_err(wdev->dev, + "WSM request %s%s%s (%#.2x) on vif %d returned error %d\n", + get_hif_name(cmd), mib_sep, mib_name, cmd, vif, ret); + if (ret > 0) + dev_warn(wdev->dev, + "WSM request %s%s%s (%#.2x) on vif %d returned status %d\n", + get_hif_name(cmd), mib_sep, mib_name, cmd, vif, ret); + + if (cmd != HIF_REQ_ID_SL_EXCHANGE_PUB_KEYS) + mutex_unlock(&wdev->hif_cmd.key_renew_lock); + return ret; +} + +// This function is special. After HIF_REQ_ID_SHUT_DOWN, chip won't reply to any +// request anymore. We need to slightly hack struct wfx_hif_cmd for that job. Be +// carefull to only call this funcion during device unregister. +int hif_shutdown(struct wfx_dev *wdev) +{ + int ret; + struct hif_msg *hif; + + wfx_alloc_hif(0, &hif); + wfx_fill_header(hif, -1, HIF_REQ_ID_SHUT_DOWN, 0); + ret = wfx_cmd_send(wdev, hif, NULL, 0, true); + // After this command, chip won't reply. Be sure to give enough time to + // bh to send buffer: + msleep(100); + wdev->hif_cmd.buf_send = NULL; + if (wdev->pdata.gpio_wakeup) + gpiod_set_value(wdev->pdata.gpio_wakeup, 0); + else + control_reg_write(wdev, 0); + mutex_unlock(&wdev->hif_cmd.lock); + kfree(hif); + return ret; +} + +int hif_configuration(struct wfx_dev *wdev, const u8 *conf, size_t len) +{ + int ret; + size_t buf_len = sizeof(struct hif_req_configuration) + len; + struct hif_msg *hif; + struct hif_req_configuration *body = wfx_alloc_hif(buf_len, &hif); + + body->length = cpu_to_le16(len); + memcpy(body->pds_data, conf, len); + wfx_fill_header(hif, -1, HIF_REQ_ID_CONFIGURATION, buf_len); + ret = wfx_cmd_send(wdev, hif, NULL, 0, false); + kfree(hif); + return ret; +} + +int hif_reset(struct wfx_vif *wvif, bool reset_stat) +{ + int ret; + struct hif_msg *hif; + struct hif_req_reset *body = wfx_alloc_hif(sizeof(*body), &hif); + + body->reset_flags.reset_stat = reset_stat; + wfx_fill_header(hif, wvif->id, HIF_REQ_ID_RESET, sizeof(*body)); + ret = wfx_cmd_send(wvif->wdev, hif, NULL, 0, false); + kfree(hif); + return ret; +} + +int hif_read_mib(struct wfx_dev *wdev, int vif_id, u16 mib_id, void *val, + size_t val_len) +{ + int ret; + struct hif_msg *hif; + int buf_len = sizeof(struct hif_cnf_read_mib) + val_len; + struct hif_req_read_mib *body = wfx_alloc_hif(sizeof(*body), &hif); + struct hif_cnf_read_mib *reply = kmalloc(buf_len, GFP_KERNEL); + + body->mib_id = cpu_to_le16(mib_id); + wfx_fill_header(hif, vif_id, HIF_REQ_ID_READ_MIB, sizeof(*body)); + ret = wfx_cmd_send(wdev, hif, reply, buf_len, false); + + if (!ret && mib_id != reply->mib_id) { + dev_warn(wdev->dev, + "%s: confirmation mismatch request\n", __func__); + ret = -EIO; + } + if (ret == -ENOMEM) + dev_err(wdev->dev, + "buffer is too small to receive %s (%zu < %d)\n", + get_mib_name(mib_id), val_len, reply->length); + if (!ret) + memcpy(val, &reply->mib_data, reply->length); + else + memset(val, 0xFF, val_len); + kfree(hif); + kfree(reply); + return ret; +} + +int hif_write_mib(struct wfx_dev *wdev, int vif_id, u16 mib_id, void *val, + size_t val_len) +{ + int ret; + struct hif_msg *hif; + int buf_len = sizeof(struct hif_req_write_mib) + val_len; + struct hif_req_write_mib *body = wfx_alloc_hif(buf_len, &hif); + + body->mib_id = cpu_to_le16(mib_id); + body->length = cpu_to_le16(val_len); + memcpy(&body->mib_data, val, val_len); + wfx_fill_header(hif, vif_id, HIF_REQ_ID_WRITE_MIB, buf_len); + ret = wfx_cmd_send(wdev, hif, NULL, 0, false); + kfree(hif); + return ret; +} + +int hif_scan(struct wfx_vif *wvif, const struct wfx_scan_params *arg) +{ + int ret, i; + struct hif_msg *hif; + struct hif_ssid_def *ssids; + size_t buf_len = sizeof(struct hif_req_start_scan) + + arg->scan_req.num_of_channels * sizeof(u8) + + arg->scan_req.num_of_ssi_ds * sizeof(struct hif_ssid_def); + struct hif_req_start_scan *body = wfx_alloc_hif(buf_len, &hif); + u8 *ptr = (u8 *) body + sizeof(*body); + + WARN(arg->scan_req.num_of_channels > HIF_API_MAX_NB_CHANNELS, "invalid params"); + WARN(arg->scan_req.num_of_ssi_ds > 2, "invalid params"); + WARN(arg->scan_req.band > 1, "invalid params"); + + // FIXME: This API is unnecessary complex, fixing NumOfChannels and + // adding a member SsidDef at end of struct hif_req_start_scan would + // simplify that a lot. + memcpy(body, &arg->scan_req, sizeof(*body)); + cpu_to_le32s(&body->min_channel_time); + cpu_to_le32s(&body->max_channel_time); + cpu_to_le32s(&body->tx_power_level); + memcpy(ptr, arg->ssids, + arg->scan_req.num_of_ssi_ds * sizeof(struct hif_ssid_def)); + ssids = (struct hif_ssid_def *) ptr; + for (i = 0; i < body->num_of_ssi_ds; ++i) + cpu_to_le32s(&ssids[i].ssid_length); + ptr += arg->scan_req.num_of_ssi_ds * sizeof(struct hif_ssid_def); + memcpy(ptr, arg->ch, arg->scan_req.num_of_channels * sizeof(u8)); + ptr += arg->scan_req.num_of_channels * sizeof(u8); + WARN(buf_len != ptr - (u8 *) body, "allocation size mismatch"); + wfx_fill_header(hif, wvif->id, HIF_REQ_ID_START_SCAN, buf_len); + ret = wfx_cmd_send(wvif->wdev, hif, NULL, 0, false); + kfree(hif); + return ret; +} + +int hif_stop_scan(struct wfx_vif *wvif) +{ + int ret; + struct hif_msg *hif; + // body associated to HIF_REQ_ID_STOP_SCAN is empty + wfx_alloc_hif(0, &hif); + + wfx_fill_header(hif, wvif->id, HIF_REQ_ID_STOP_SCAN, 0); + ret = wfx_cmd_send(wvif->wdev, hif, NULL, 0, false); + kfree(hif); + return ret; +} + +int hif_join(struct wfx_vif *wvif, const struct hif_req_join *arg) +{ + int ret; + struct hif_msg *hif; + struct hif_req_join *body = wfx_alloc_hif(sizeof(*body), &hif); + + memcpy(body, arg, sizeof(struct hif_req_join)); + cpu_to_le16s(&body->channel_number); + cpu_to_le16s(&body->atim_window); + cpu_to_le32s(&body->ssid_length); + cpu_to_le32s(&body->beacon_interval); + cpu_to_le32s(&body->basic_rate_set); + wfx_fill_header(hif, wvif->id, HIF_REQ_ID_JOIN, sizeof(*body)); + ret = wfx_cmd_send(wvif->wdev, hif, NULL, 0, false); + kfree(hif); + return ret; +} + +int hif_set_bss_params(struct wfx_vif *wvif, + const struct hif_req_set_bss_params *arg) +{ + int ret; + struct hif_msg *hif; + struct hif_req_set_bss_params *body = wfx_alloc_hif(sizeof(*body), + &hif); + + memcpy(body, arg, sizeof(*body)); + cpu_to_le16s(&body->aid); + cpu_to_le32s(&body->operational_rate_set); + wfx_fill_header(hif, wvif->id, HIF_REQ_ID_SET_BSS_PARAMS, + sizeof(*body)); + ret = wfx_cmd_send(wvif->wdev, hif, NULL, 0, false); + kfree(hif); + return ret; +} + +int hif_add_key(struct wfx_dev *wdev, const struct hif_req_add_key *arg) +{ + int ret; + struct hif_msg *hif; + // FIXME: only send necessary bits + struct hif_req_add_key *body = wfx_alloc_hif(sizeof(*body), &hif); + + // FIXME: swap bytes as necessary in body + memcpy(body, arg, sizeof(*body)); + if (wfx_api_older_than(wdev, 1, 5)) + // Legacy firmwares expect that add_key to be sent on right + // interface. + wfx_fill_header(hif, arg->int_id, HIF_REQ_ID_ADD_KEY, + sizeof(*body)); + else + wfx_fill_header(hif, -1, HIF_REQ_ID_ADD_KEY, sizeof(*body)); + ret = wfx_cmd_send(wdev, hif, NULL, 0, false); + kfree(hif); + return ret; +} + +int hif_remove_key(struct wfx_dev *wdev, int idx) +{ + int ret; + struct hif_msg *hif; + struct hif_req_remove_key *body = wfx_alloc_hif(sizeof(*body), &hif); + + body->entry_index = idx; + wfx_fill_header(hif, -1, HIF_REQ_ID_REMOVE_KEY, sizeof(*body)); + ret = wfx_cmd_send(wdev, hif, NULL, 0, false); + kfree(hif); + return ret; +} + +int hif_set_edca_queue_params(struct wfx_vif *wvif, + const struct hif_req_edca_queue_params *arg) +{ + int ret; + struct hif_msg *hif; + struct hif_req_edca_queue_params *body = wfx_alloc_hif(sizeof(*body), + &hif); + + // NOTE: queues numerotation are not the same between WFx and Linux + memcpy(body, arg, sizeof(*body)); + cpu_to_le16s(&body->cw_min); + cpu_to_le16s(&body->cw_max); + cpu_to_le16s(&body->tx_op_limit); + wfx_fill_header(hif, wvif->id, HIF_REQ_ID_EDCA_QUEUE_PARAMS, + sizeof(*body)); + ret = wfx_cmd_send(wvif->wdev, hif, NULL, 0, false); + kfree(hif); + return ret; +} + +int hif_set_pm(struct wfx_vif *wvif, const struct hif_req_set_pm_mode *arg) +{ + int ret; + struct hif_msg *hif; + struct hif_req_set_pm_mode *body = wfx_alloc_hif(sizeof(*body), &hif); + + memcpy(body, arg, sizeof(*body)); + wfx_fill_header(hif, wvif->id, HIF_REQ_ID_SET_PM_MODE, sizeof(*body)); + ret = wfx_cmd_send(wvif->wdev, hif, NULL, 0, false); + kfree(hif); + return ret; +} + +int hif_start(struct wfx_vif *wvif, const struct hif_req_start *arg) +{ + int ret; + struct hif_msg *hif; + struct hif_req_start *body = wfx_alloc_hif(sizeof(*body), &hif); + + memcpy(body, arg, sizeof(*body)); + cpu_to_le16s(&body->channel_number); + cpu_to_le32s(&body->beacon_interval); + cpu_to_le32s(&body->basic_rate_set); + wfx_fill_header(hif, wvif->id, HIF_REQ_ID_START, sizeof(*body)); + ret = wfx_cmd_send(wvif->wdev, hif, NULL, 0, false); + kfree(hif); + return ret; +} + +int hif_beacon_transmit(struct wfx_vif *wvif, bool enable_beaconing) +{ + int ret; + struct hif_msg *hif; + struct hif_req_beacon_transmit *body = wfx_alloc_hif(sizeof(*body), + &hif); + + body->enable_beaconing = enable_beaconing ? 1 : 0; + wfx_fill_header(hif, wvif->id, HIF_REQ_ID_BEACON_TRANSMIT, + sizeof(*body)); + ret = wfx_cmd_send(wvif->wdev, hif, NULL, 0, false); + kfree(hif); + return ret; +} + +int hif_map_link(struct wfx_vif *wvif, u8 *mac_addr, int flags, int sta_id) +{ + int ret; + struct hif_msg *hif; + struct hif_req_map_link *body = wfx_alloc_hif(sizeof(*body), &hif); + + if (mac_addr) + ether_addr_copy(body->mac_addr, mac_addr); + body->map_link_flags = *(struct hif_map_link_flags *) &flags; + body->peer_sta_id = sta_id; + wfx_fill_header(hif, wvif->id, HIF_REQ_ID_MAP_LINK, sizeof(*body)); + ret = wfx_cmd_send(wvif->wdev, hif, NULL, 0, false); + kfree(hif); + return ret; +} + +int hif_update_ie(struct wfx_vif *wvif, const struct hif_ie_flags *target_frame, + const u8 *ies, size_t ies_len) +{ + int ret; + struct hif_msg *hif; + int buf_len = sizeof(struct hif_req_update_ie) + ies_len; + struct hif_req_update_ie *body = wfx_alloc_hif(buf_len, &hif); + + memcpy(&body->ie_flags, target_frame, sizeof(struct hif_ie_flags)); + body->num_i_es = cpu_to_le16(1); + memcpy(body->ie, ies, ies_len); + wfx_fill_header(hif, wvif->id, HIF_REQ_ID_UPDATE_IE, buf_len); + ret = wfx_cmd_send(wvif->wdev, hif, NULL, 0, false); + kfree(hif); + return ret; +} + +int hif_sl_send_pub_keys(struct wfx_dev *wdev, const uint8_t *pubkey, + const uint8_t *pubkey_hmac) +{ + int ret; + struct hif_msg *hif; + struct hif_req_sl_exchange_pub_keys *body = wfx_alloc_hif(sizeof(*body), + &hif); + + body->algorithm = HIF_SL_CURVE25519; + memcpy(body->host_pub_key, pubkey, sizeof(body->host_pub_key)); + memcpy(body->host_pub_key_mac, pubkey_hmac, + sizeof(body->host_pub_key_mac)); + wfx_fill_header(hif, -1, HIF_REQ_ID_SL_EXCHANGE_PUB_KEYS, + sizeof(*body)); + ret = wfx_cmd_send(wdev, hif, NULL, 0, false); + kfree(hif); + // Compatibility with legacy secure link + if (ret == SL_PUB_KEY_EXCHANGE_STATUS_SUCCESS) + ret = 0; + return ret; +} + +int hif_sl_config(struct wfx_dev *wdev, const unsigned long *bitmap) +{ + int ret; + struct hif_msg *hif; + struct hif_req_sl_configure *body = wfx_alloc_hif(sizeof(*body), &hif); + + memcpy(body->encr_bmp, bitmap, sizeof(body->encr_bmp)); + wfx_fill_header(hif, -1, HIF_REQ_ID_SL_CONFIGURE, sizeof(*body)); + ret = wfx_cmd_send(wdev, hif, NULL, 0, false); + kfree(hif); + return ret; +} + +int hif_sl_set_mac_key(struct wfx_dev *wdev, const u8 *slk_key, + int destination) +{ + int ret; + struct hif_msg *hif; + struct hif_req_set_sl_mac_key *body = wfx_alloc_hif(sizeof(*body), + &hif); + + memcpy(body->key_value, slk_key, sizeof(body->key_value)); + body->otp_or_ram = destination; + wfx_fill_header(hif, -1, HIF_REQ_ID_SET_SL_MAC_KEY, sizeof(*body)); + ret = wfx_cmd_send(wdev, hif, NULL, 0, false); + kfree(hif); + // Compatibility with legacy secure link + if (ret == SL_MAC_KEY_STATUS_SUCCESS) + ret = 0; + return ret; +} |