--- /dev/null
+/*
+ * Marvell Wireless LAN device driver: utility functions
+ *
+ * Copyright (C) 2011-2014, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License"). You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available by writing to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
+ * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
+ * this warranty disclaimer.
+ */
+
+#include "decl.h"
+#include "ioctl.h"
+#include "util.h"
+#include "fw.h"
+#include "main.h"
+#include "wmm.h"
+#include "11n.h"
+
+static struct mwifiex_debug_data items[] = {
+ {"int_counter", item_size(int_counter),
+ item_addr(int_counter), 1},
+ {"wmm_ac_vo", item_size(packets_out[WMM_AC_VO]),
+ item_addr(packets_out[WMM_AC_VO]), 1},
+ {"wmm_ac_vi", item_size(packets_out[WMM_AC_VI]),
+ item_addr(packets_out[WMM_AC_VI]), 1},
+ {"wmm_ac_be", item_size(packets_out[WMM_AC_BE]),
+ item_addr(packets_out[WMM_AC_BE]), 1},
+ {"wmm_ac_bk", item_size(packets_out[WMM_AC_BK]),
+ item_addr(packets_out[WMM_AC_BK]), 1},
+ {"tx_buf_size", item_size(tx_buf_size),
+ item_addr(tx_buf_size), 1},
+ {"curr_tx_buf_size", item_size(curr_tx_buf_size),
+ item_addr(curr_tx_buf_size), 1},
+ {"ps_mode", item_size(ps_mode),
+ item_addr(ps_mode), 1},
+ {"ps_state", item_size(ps_state),
+ item_addr(ps_state), 1},
+ {"is_deep_sleep", item_size(is_deep_sleep),
+ item_addr(is_deep_sleep), 1},
+ {"wakeup_dev_req", item_size(pm_wakeup_card_req),
+ item_addr(pm_wakeup_card_req), 1},
+ {"wakeup_tries", item_size(pm_wakeup_fw_try),
+ item_addr(pm_wakeup_fw_try), 1},
+ {"hs_configured", item_size(is_hs_configured),
+ item_addr(is_hs_configured), 1},
+ {"hs_activated", item_size(hs_activated),
+ item_addr(hs_activated), 1},
+ {"num_tx_timeout", item_size(num_tx_timeout),
+ item_addr(num_tx_timeout), 1},
+ {"is_cmd_timedout", item_size(is_cmd_timedout),
+ item_addr(is_cmd_timedout), 1},
+ {"timeout_cmd_id", item_size(timeout_cmd_id),
+ item_addr(timeout_cmd_id), 1},
+ {"timeout_cmd_act", item_size(timeout_cmd_act),
+ item_addr(timeout_cmd_act), 1},
+ {"last_cmd_id", item_size(last_cmd_id),
+ item_addr(last_cmd_id), DBG_CMD_NUM},
+ {"last_cmd_act", item_size(last_cmd_act),
+ item_addr(last_cmd_act), DBG_CMD_NUM},
+ {"last_cmd_index", item_size(last_cmd_index),
+ item_addr(last_cmd_index), 1},
+ {"last_cmd_resp_id", item_size(last_cmd_resp_id),
+ item_addr(last_cmd_resp_id), DBG_CMD_NUM},
+ {"last_cmd_resp_index", item_size(last_cmd_resp_index),
+ item_addr(last_cmd_resp_index), 1},
+ {"last_event", item_size(last_event),
+ item_addr(last_event), DBG_CMD_NUM},
+ {"last_event_index", item_size(last_event_index),
+ item_addr(last_event_index), 1},
+ {"num_cmd_h2c_fail", item_size(num_cmd_host_to_card_failure),
+ item_addr(num_cmd_host_to_card_failure), 1},
+ {"num_cmd_sleep_cfm_fail",
+ item_size(num_cmd_sleep_cfm_host_to_card_failure),
+ item_addr(num_cmd_sleep_cfm_host_to_card_failure), 1},
+ {"num_tx_h2c_fail", item_size(num_tx_host_to_card_failure),
+ item_addr(num_tx_host_to_card_failure), 1},
+ {"num_evt_deauth", item_size(num_event_deauth),
+ item_addr(num_event_deauth), 1},
+ {"num_evt_disassoc", item_size(num_event_disassoc),
+ item_addr(num_event_disassoc), 1},
+ {"num_evt_link_lost", item_size(num_event_link_lost),
+ item_addr(num_event_link_lost), 1},
+ {"num_cmd_deauth", item_size(num_cmd_deauth),
+ item_addr(num_cmd_deauth), 1},
+ {"num_cmd_assoc_ok", item_size(num_cmd_assoc_success),
+ item_addr(num_cmd_assoc_success), 1},
+ {"num_cmd_assoc_fail", item_size(num_cmd_assoc_failure),
+ item_addr(num_cmd_assoc_failure), 1},
+ {"cmd_sent", item_size(cmd_sent),
+ item_addr(cmd_sent), 1},
+ {"data_sent", item_size(data_sent),
+ item_addr(data_sent), 1},
+ {"cmd_resp_received", item_size(cmd_resp_received),
+ item_addr(cmd_resp_received), 1},
+ {"event_received", item_size(event_received),
+ item_addr(event_received), 1},
+
+ /* variables defined in struct mwifiex_adapter */
+ {"cmd_pending", adapter_item_size(cmd_pending),
+ adapter_item_addr(cmd_pending), 1},
+ {"tx_pending", adapter_item_size(tx_pending),
+ adapter_item_addr(tx_pending), 1},
+ {"rx_pending", adapter_item_size(rx_pending),
+ adapter_item_addr(rx_pending), 1},
+};
+
+static int num_of_items = ARRAY_SIZE(items);
+
+/*
+ * Firmware initialization complete callback handler.
+ *
+ * This function wakes up the function waiting on the init
+ * wait queue for the firmware initialization to complete.
+ */
+int mwifiex_init_fw_complete(struct mwifiex_adapter *adapter)
+{
+
+ adapter->init_wait_q_woken = true;
+ wake_up_interruptible(&adapter->init_wait_q);
+ return 0;
+}
+
+/*
+ * Firmware shutdown complete callback handler.
+ *
+ * This function sets the hardware status to not ready and wakes up
+ * the function waiting on the init wait queue for the firmware
+ * shutdown to complete.
+ */
+int mwifiex_shutdown_fw_complete(struct mwifiex_adapter *adapter)
+{
+ adapter->hw_status = MWIFIEX_HW_STATUS_NOT_READY;
+ adapter->init_wait_q_woken = true;
+ wake_up_interruptible(&adapter->init_wait_q);
+ return 0;
+}
+
+/*
+ * This function sends init/shutdown command
+ * to firmware.
+ */
+int mwifiex_init_shutdown_fw(struct mwifiex_private *priv,
+ u32 func_init_shutdown)
+{
+ u16 cmd;
+
+ if (func_init_shutdown == MWIFIEX_FUNC_INIT) {
+ cmd = HostCmd_CMD_FUNC_INIT;
+ } else if (func_init_shutdown == MWIFIEX_FUNC_SHUTDOWN) {
+ cmd = HostCmd_CMD_FUNC_SHUTDOWN;
+ } else {
+ dev_err(priv->adapter->dev, "unsupported parameter\n");
+ return -1;
+ }
+
+ return mwifiex_send_cmd(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL, true);
+}
+EXPORT_SYMBOL_GPL(mwifiex_init_shutdown_fw);
+
+/*
+ * IOCTL request handler to set/get debug information.
+ *
+ * This function collates/sets the information from/to different driver
+ * structures.
+ */
+int mwifiex_get_debug_info(struct mwifiex_private *priv,
+ struct mwifiex_debug_info *info)
+{
+ struct mwifiex_adapter *adapter = priv->adapter;
+
+ if (info) {
+ memcpy(info->packets_out,
+ priv->wmm.packets_out,
+ sizeof(priv->wmm.packets_out));
+ info->curr_tx_buf_size = (u32) adapter->curr_tx_buf_size;
+ info->tx_buf_size = (u32) adapter->tx_buf_size;
+ info->rx_tbl_num = mwifiex_get_rx_reorder_tbl(priv,
+ info->rx_tbl);
+ info->tx_tbl_num = mwifiex_get_tx_ba_stream_tbl(priv,
+ info->tx_tbl);
+ info->tdls_peer_num = mwifiex_get_tdls_list(priv,
+ info->tdls_list);
+ info->ps_mode = adapter->ps_mode;
+ info->ps_state = adapter->ps_state;
+ info->is_deep_sleep = adapter->is_deep_sleep;
+ info->pm_wakeup_card_req = adapter->pm_wakeup_card_req;
+ info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try;
+ info->is_hs_configured = adapter->is_hs_configured;
+ info->hs_activated = adapter->hs_activated;
+ info->is_cmd_timedout = adapter->is_cmd_timedout;
+ info->num_cmd_host_to_card_failure
+ = adapter->dbg.num_cmd_host_to_card_failure;
+ info->num_cmd_sleep_cfm_host_to_card_failure
+ = adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure;
+ info->num_tx_host_to_card_failure
+ = adapter->dbg.num_tx_host_to_card_failure;
+ info->num_event_deauth = adapter->dbg.num_event_deauth;
+ info->num_event_disassoc = adapter->dbg.num_event_disassoc;
+ info->num_event_link_lost = adapter->dbg.num_event_link_lost;
+ info->num_cmd_deauth = adapter->dbg.num_cmd_deauth;
+ info->num_cmd_assoc_success =
+ adapter->dbg.num_cmd_assoc_success;
+ info->num_cmd_assoc_failure =
+ adapter->dbg.num_cmd_assoc_failure;
+ info->num_tx_timeout = adapter->dbg.num_tx_timeout;
+ info->timeout_cmd_id = adapter->dbg.timeout_cmd_id;
+ info->timeout_cmd_act = adapter->dbg.timeout_cmd_act;
+ memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id,
+ sizeof(adapter->dbg.last_cmd_id));
+ memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act,
+ sizeof(adapter->dbg.last_cmd_act));
+ info->last_cmd_index = adapter->dbg.last_cmd_index;
+ memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id,
+ sizeof(adapter->dbg.last_cmd_resp_id));
+ info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index;
+ memcpy(info->last_event, adapter->dbg.last_event,
+ sizeof(adapter->dbg.last_event));
+ info->last_event_index = adapter->dbg.last_event_index;
+ info->data_sent = adapter->data_sent;
+ info->cmd_sent = adapter->cmd_sent;
+ info->cmd_resp_received = adapter->cmd_resp_received;
+ }
+
+ return 0;
+}
+
+int mwifiex_debug_info_to_buffer(struct mwifiex_private *priv, char *buf,
+ struct mwifiex_debug_info *info)
+{
+ char *p = buf;
+ struct mwifiex_debug_data *d = &items[0];
+ size_t size, addr;
+ long val;
+ int i, j;
+
+ if (!info)
+ return 0;
+
+ for (i = 0; i < num_of_items; i++) {
+ p += sprintf(p, "%s=", d[i].name);
+
+ size = d[i].size / d[i].num;
+
+ if (i < (num_of_items - 3))
+ addr = d[i].addr + (size_t)info;
+ else /* The last 3 items are struct mwifiex_adapter variables */
+ addr = d[i].addr + (size_t)priv->adapter;
+
+ for (j = 0; j < d[i].num; j++) {
+ switch (size) {
+ case 1:
+ val = *((u8 *)addr);
+ break;
+ case 2:
+ val = *((u16 *)addr);
+ break;
+ case 4:
+ val = *((u32 *)addr);
+ break;
+ case 8:
+ val = *((long long *)addr);
+ break;
+ default:
+ val = -1;
+ break;
+ }
+
+ p += sprintf(p, "%#lx ", val);
+ addr += size;
+ }
+
+ p += sprintf(p, "\n");
+ }
+
+ if (info->tx_tbl_num) {
+ p += sprintf(p, "Tx BA stream table:\n");
+ for (i = 0; i < info->tx_tbl_num; i++)
+ p += sprintf(p, "tid = %d, ra = %pM\n",
+ info->tx_tbl[i].tid, info->tx_tbl[i].ra);
+ }
+
+ if (info->rx_tbl_num) {
+ p += sprintf(p, "Rx reorder table:\n");
+ for (i = 0; i < info->rx_tbl_num; i++) {
+ p += sprintf(p, "tid = %d, ta = %pM, ",
+ info->rx_tbl[i].tid,
+ info->rx_tbl[i].ta);
+ p += sprintf(p, "start_win = %d, ",
+ info->rx_tbl[i].start_win);
+ p += sprintf(p, "win_size = %d, buffer: ",
+ info->rx_tbl[i].win_size);
+
+ for (j = 0; j < info->rx_tbl[i].win_size; j++)
+ p += sprintf(p, "%c ",
+ info->rx_tbl[i].buffer[j] ?
+ '1' : '0');
+
+ p += sprintf(p, "\n");
+ }
+ }
+
+ if (info->tdls_peer_num) {
+ p += sprintf(p, "TDLS peer table:\n");
+ for (i = 0; i < info->tdls_peer_num; i++) {
+ p += sprintf(p, "peer = %pM",
+ info->tdls_list[i].peer_addr);
+ p += sprintf(p, "\n");
+ }
+ }
+
+ return p - buf;
+}
+
+static int
+mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len,
+ struct rxpd *rx_pd)
+{
+ u16 stype;
+ u8 category, action_code;
+ struct ieee80211_hdr *ieee_hdr = (void *)payload;
+
+ stype = (le16_to_cpu(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE);
+
+ switch (stype) {
+ case IEEE80211_STYPE_ACTION:
+ category = *(payload + sizeof(struct ieee80211_hdr));
+ action_code = *(payload + sizeof(struct ieee80211_hdr) + 1);
+ if (category == WLAN_CATEGORY_PUBLIC &&
+ action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
+ dev_dbg(priv->adapter->dev,
+ "TDLS discovery response %pM nf=%d, snr=%d\n",
+ ieee_hdr->addr2, rx_pd->nf, rx_pd->snr);
+ mwifiex_auto_tdls_update_peer_signal(priv,
+ ieee_hdr->addr2,
+ rx_pd->snr,
+ rx_pd->nf);
+ }
+ break;
+ default:
+ dev_dbg(priv->adapter->dev,
+ "unknown mgmt frame subytpe %#x\n", stype);
+ }
+
+ return 0;
+}
+/*
+ * This function processes the received management packet and send it
+ * to the kernel.
+ */
+int
+mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
+ struct sk_buff *skb)
+{
+ struct rxpd *rx_pd;
+ u16 pkt_len;
+ struct ieee80211_hdr *ieee_hdr;
+
+ if (!skb)
+ return -1;
+
+ if (!priv->mgmt_frame_mask ||
+ priv->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) {
+ dev_dbg(priv->adapter->dev,
+ "do not receive mgmt frames on uninitialized intf");
+ return -1;
+ }
+
+ rx_pd = (struct rxpd *)skb->data;
+
+ skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset));
+ skb_pull(skb, sizeof(pkt_len));
+
+ pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
+
+ ieee_hdr = (void *)skb->data;
+ if (ieee80211_is_mgmt(ieee_hdr->frame_control)) {
+ mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr,
+ pkt_len, rx_pd);
+ }
+ /* Remove address4 */
+ memmove(skb->data + sizeof(struct ieee80211_hdr_3addr),
+ skb->data + sizeof(struct ieee80211_hdr),
+ pkt_len - sizeof(struct ieee80211_hdr));
+
+ pkt_len -= ETH_ALEN + sizeof(pkt_len);
+ rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
+
+ cfg80211_rx_mgmt(&priv->wdev, priv->roc_cfg.chan.center_freq,
+ CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len,
+ 0);
+
+ return 0;
+}
+
+/*
+ * This function processes the received packet before sending it to the
+ * kernel.
+ *
+ * It extracts the SKB from the received buffer and sends it to kernel.
+ * In case the received buffer does not contain the data in SKB format,
+ * the function creates a blank SKB, fills it with the data from the
+ * received buffer and then sends this new SKB to the kernel.
+ */
+int mwifiex_recv_packet(struct mwifiex_private *priv, struct sk_buff *skb)
+{
+ if (!skb)
+ return -1;
+
+ priv->stats.rx_bytes += skb->len;
+ priv->stats.rx_packets++;
+
+ skb->dev = priv->netdev;
+ skb->protocol = eth_type_trans(skb, priv->netdev);
+ skb->ip_summed = CHECKSUM_NONE;
+
+ /* This is required only in case of 11n and USB/PCIE as we alloc
+ * a buffer of 4K only if its 11N (to be able to receive 4K
+ * AMSDU packets). In case of SD we allocate buffers based
+ * on the size of packet and hence this is not needed.
+ *
+ * Modifying the truesize here as our allocation for each
+ * skb is 4K but we only receive 2K packets and this cause
+ * the kernel to start dropping packets in case where
+ * application has allocated buffer based on 2K size i.e.
+ * if there a 64K packet received (in IP fragments and
+ * application allocates 64K to receive this packet but
+ * this packet would almost double up because we allocate
+ * each 1.5K fragment in 4K and pass it up. As soon as the
+ * 64K limit hits kernel will start to drop rest of the
+ * fragments. Currently we fail the Filesndl-ht.scr script
+ * for UDP, hence this fix
+ */
+ if ((priv->adapter->iface_type == MWIFIEX_USB ||
+ priv->adapter->iface_type == MWIFIEX_PCIE) &&
+ (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE))
+ skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE);
+
+ if (in_interrupt())
+ netif_rx(skb);
+ else
+ netif_rx_ni(skb);
+
+ return 0;
+}
+
+/*
+ * IOCTL completion callback handler.
+ *
+ * This function is called when a pending IOCTL is completed.
+ *
+ * If work queue support is enabled, the function wakes up the
+ * corresponding waiting function. Otherwise, it processes the
+ * IOCTL response and frees the response buffer.
+ */
+int mwifiex_complete_cmd(struct mwifiex_adapter *adapter,
+ struct cmd_ctrl_node *cmd_node)
+{
+ dev_dbg(adapter->dev, "cmd completed: status=%d\n",
+ adapter->cmd_wait_q.status);
+
+ *(cmd_node->condition) = true;
+
+ if (adapter->cmd_wait_q.status == -ETIMEDOUT)
+ dev_err(adapter->dev, "cmd timeout\n");
+ else
+ wake_up_interruptible(&adapter->cmd_wait_q.wait);
+
+ return 0;
+}
+
+/* This function will return the pointer to station entry in station list
+ * table which matches specified mac address.
+ * This function should be called after acquiring RA list spinlock.
+ * NULL is returned if station entry is not found in associated STA list.
+ */
+struct mwifiex_sta_node *
+mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac)
+{
+ struct mwifiex_sta_node *node;
+
+ if (!mac)
+ return NULL;
+
+ list_for_each_entry(node, &priv->sta_list, list) {
+ if (!memcmp(node->mac_addr, mac, ETH_ALEN))
+ return node;
+ }
+
+ return NULL;
+}
+
+/* This function will add a sta_node entry to associated station list
+ * table with the given mac address.
+ * If entry exist already, existing entry is returned.
+ * If received mac address is NULL, NULL is returned.
+ */
+struct mwifiex_sta_node *
+mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac)
+{
+ struct mwifiex_sta_node *node;
+ unsigned long flags;
+
+ if (!mac)
+ return NULL;
+
+ spin_lock_irqsave(&priv->sta_list_spinlock, flags);
+ node = mwifiex_get_sta_entry(priv, mac);
+ if (node)
+ goto done;
+
+ node = kzalloc(sizeof(*node), GFP_ATOMIC);
+ if (!node)
+ goto done;
+
+ memcpy(node->mac_addr, mac, ETH_ALEN);
+ list_add_tail(&node->list, &priv->sta_list);
+
+done:
+ spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
+ return node;
+}
+
+/* This function will search for HT IE in association request IEs
+ * and set station HT parameters accordingly.
+ */
+void
+mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
+ int ies_len, struct mwifiex_sta_node *node)
+{
+ const struct ieee80211_ht_cap *ht_cap;
+
+ if (!ies)
+ return;
+
+ ht_cap = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, ies_len);
+ if (ht_cap) {
+ node->is_11n_enabled = 1;
+ node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
+ IEEE80211_HT_CAP_MAX_AMSDU ?
+ MWIFIEX_TX_DATA_BUF_SIZE_8K :
+ MWIFIEX_TX_DATA_BUF_SIZE_4K;
+ } else {
+ node->is_11n_enabled = 0;
+ }
+
+ return;
+}
+
+/* This function will delete a station entry from station list */
+void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac)
+{
+ struct mwifiex_sta_node *node;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->sta_list_spinlock, flags);
+
+ node = mwifiex_get_sta_entry(priv, mac);
+ if (node) {
+ list_del(&node->list);
+ kfree(node);
+ }
+
+ spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
+ return;
+}
+
+/* This function will delete all stations from associated station list. */
+void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
+{
+ struct mwifiex_sta_node *node, *tmp;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->sta_list_spinlock, flags);
+
+ list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
+ list_del(&node->list);
+ kfree(node);
+ }
+
+ INIT_LIST_HEAD(&priv->sta_list);
+ spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
+ return;
+}
+
+/* This function adds histogram data to histogram array*/
+void mwifiex_hist_data_add(struct mwifiex_private *priv,
+ u8 rx_rate, s8 snr, s8 nflr)
+{
+ struct mwifiex_histogram_data *phist_data = priv->hist_data;
+
+ if (atomic_read(&phist_data->num_samples) > MWIFIEX_HIST_MAX_SAMPLES)
+ mwifiex_hist_data_reset(priv);
+ mwifiex_hist_data_set(priv, rx_rate, snr, nflr);
+}
+
+/* function to add histogram record */
+void mwifiex_hist_data_set(struct mwifiex_private *priv, u8 rx_rate, s8 snr,
+ s8 nflr)
+{
+ struct mwifiex_histogram_data *phist_data = priv->hist_data;
+
+ atomic_inc(&phist_data->num_samples);
+ atomic_inc(&phist_data->rx_rate[rx_rate]);
+ atomic_inc(&phist_data->snr[snr]);
+ atomic_inc(&phist_data->noise_flr[128 + nflr]);
+ atomic_inc(&phist_data->sig_str[nflr - snr]);
+}
+
+/* function to reset histogram data during init/reset */
+void mwifiex_hist_data_reset(struct mwifiex_private *priv)
+{
+ int ix;
+ struct mwifiex_histogram_data *phist_data = priv->hist_data;
+
+ atomic_set(&phist_data->num_samples, 0);
+ for (ix = 0; ix < MWIFIEX_MAX_AC_RX_RATES; ix++)
+ atomic_set(&phist_data->rx_rate[ix], 0);
+ for (ix = 0; ix < MWIFIEX_MAX_SNR; ix++)
+ atomic_set(&phist_data->snr[ix], 0);
+ for (ix = 0; ix < MWIFIEX_MAX_NOISE_FLR; ix++)
+ atomic_set(&phist_data->noise_flr[ix], 0);
+ for (ix = 0; ix < MWIFIEX_MAX_SIG_STRENGTH; ix++)
+ atomic_set(&phist_data->sig_str[ix], 0);
+}
+
+void *mwifiex_alloc_dma_align_buf(int rx_len, gfp_t flags)
+{
+ struct sk_buff *skb;
+ int buf_len, pad;
+
+ buf_len = rx_len + MWIFIEX_RX_HEADROOM + MWIFIEX_DMA_ALIGN_SZ;
+
+ skb = __dev_alloc_skb(buf_len, flags);
+
+ if (!skb)
+ return NULL;
+
+ skb_reserve(skb, MWIFIEX_RX_HEADROOM);
+
+ pad = MWIFIEX_ALIGN_ADDR(skb->data, MWIFIEX_DMA_ALIGN_SZ) -
+ (long)skb->data;
+
+ skb_reserve(skb, pad);
+
+ return skb;
+}
+EXPORT_SYMBOL_GPL(mwifiex_alloc_dma_align_buf);
Code Review / kvmfornfv.git / blobdiff