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android_kernel_samsung_on5x.../drivers/net/wireless/scsc/cac.c
awab228 f6dfaef42e Fixed MTP to work with TWRP
2018-06-19 23:16:04 +02:00

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/****************************************************************************
*
* Copyright (c) 2012 - 2016 Samsung Electronics Co., Ltd. All rights reserved
*
****************************************************************************/
#include "cac.h"
static struct cac_tspec *tspec_list;
static int tspec_list_next_id;
static u8 dialog_token_next;
/* Define the meta-data info for tspec_fields */
static struct tspec_field tspec_fields[] = {
{ "traffic_type", 0, 1, 0x1, 0 },
{ "tsid", 0, 1, 0xF, 1 },
{ "direction", 0, 1, 0x3, 5 },
{ "access_policy", 0, 1, 0x3, 7 }, /* WMM - always set to 1 */
{ "aggregation", 0, 1, 0x1, 9 }, /* WMM - not supported */
{ "psb", 0, 1, 0x1, 10 },
{ "user_priority", 0, 1, 0x7, 11 },
{ "tsinfo_ack_policy", 0, 1, 0x3, 14 }, /* WMM - not supported */
{ "schedule", 0, 1, 0x1, 16 }, /* WMM - not supported */
{ "nominal_msdu_size", 0, 0, 2, OFFSETOF(nominal_msdu_size) },
{ "max_msdu_size", 0, 0, 2, OFFSETOF(maximum_msdu_size) },
{ "min_service_interval", 0, 0, 4, OFFSETOF(minimum_service_interval) },
{ "max_service_interval", 0, 0, 4, OFFSETOF(maximum_service_interval) },
{ "inactivity_interval", 0, 0, 4, OFFSETOF(inactivity_interval) },
{ "suspension_interval", 0, 0, 4, OFFSETOF(suspension_interval) },
{ "service_start_time", 0, 0, 4, OFFSETOF(service_start_time) },
{ "min_data_rate", 0, 0, 4, OFFSETOF(minimum_data_rate) },
{ "mean_data_rate", 0, 0, 4, OFFSETOF(mean_data_rate) },
{ "peak_data_rate", 0, 0, 4, OFFSETOF(peak_data_rate) },
{ "max_burst_size", 0, 0, 4, OFFSETOF(maximum_burst_size) },
{ "delay_bound", 0, 0, 4, OFFSETOF(delay_bound) },
{ "min_phy_rate", 0, 0, 4, OFFSETOF(minimum_phy_rate) },
{ "surplus_bw_allowance", 0, 0, 2,
OFFSETOF(surplus_bandwidth_allowance) },
{ "medium_time", 1, 0, 2, OFFSETOF(medium_time) },
};
/* Define the OUI type data for the corresponding IE's */
static const u8 TSRS_OUI_TYPE[] = { 0x00, 0x40, 0x96, 0x08 };
static const u8 EBW_OUI_TYPE[] = { 0x00, 0x40, 0x96, 0x0F };
static const int NUM_TSPEC_FIELDS = sizeof(tspec_fields) / sizeof(struct tspec_field);
static u32 previous_msdu_lifetime = MAX_TRANSMIT_MSDU_LIFETIME_NOT_VALID;
static u8 ccx_status = BSS_CCX_DISABLED;
/* Name: strtoint
* Desc: Converts a string to a decimal or hexadecimal integer
* s: the string to be converted
* res: pointer to the calculated integer
* return: 0 (success), 1(failure)
*/
static int strtoint(const char *s, int *res)
{
int base = 10;
if (strlen(s) > 2)
if (s[0] == '0' && (s[1] == 'x' || s[1] == 'X'))
base = 16;
return kstrtoint(s, base, res);
}
/* Name: find_tspec_entry_by_id
* Desc: Finds a tspec entry in the list of tspecs (tspec_list)
* according to tspec id.
* id: the tspec id
* return: pointer to the tspec struct or NULL if a tspec doesn't exist
*/
static struct cac_tspec *find_tspec_entry_by_id(int id)
{
struct cac_tspec *itr;
itr = tspec_list;
while (itr != NULL) {
if (itr->id == id)
break;
itr = itr->next;
}
return itr;
}
/* Name: find_tspec_entry_by_tspec
* Desc: Finds a tspec entry in the list of tspecs (tspec_list) according to a
* pointer to a tspec struct.
* tspec: pointer to a tspec
* return: pointer to the tspec struct or NULL if a tspec doesn't exist
*/
static struct cac_tspec *find_tspec_entry_by_tspec(
struct wmm_tspec_element *tspec)
{
struct cac_tspec *itr;
u32 tsinfo_a, tsinfo_b;
tsinfo_a = CAC_GET_LE24(&tspec->ts_info[0]) & TSINFO_MASK;
itr = tspec_list;
while (itr != NULL) {
tsinfo_b = CAC_GET_LE24(&itr->tspec.ts_info[0]) & TSINFO_MASK;
if (tsinfo_a == tsinfo_b)
break;
itr = itr->next;
}
return itr;
}
/* Name: cac_query_tspec_field
* Desc: Get the value of a tspec's field.
* sdev: pointer to the slsi_dev struct
* entry: pointer to the tspec
* field: the field name
* value: poinet to the field value
* return: 0 (success), -1 (failure)
*/
static int cac_query_tspec_field(struct slsi_dev *sdev, struct cac_tspec *entry, const char *field, u32 *value)
{
int i;
u32 tsinfo;
u8 mask;
u8 *pos;
if ((entry == NULL) || (field == NULL) || (value == NULL))
return -1;
for (i = 0; i < NUM_TSPEC_FIELDS; i++)
if (strcasecmp(field, tspec_fields[i].name) == 0)
break;
if (i >= NUM_TSPEC_FIELDS) {
SLSI_ERR(sdev, "CAC: Invalid TSPEC config field\n");
return -1;
}
if (tspec_fields[i].is_tsinfo_field) {
mask = tspec_fields[i].size;
tsinfo = CAC_GET_LE24(&entry->tspec.ts_info[0]) & TSINFO_MASK;
*value = (tsinfo >> tspec_fields[i].offset) & mask;
} else {
pos = (u8 *)(&entry->tspec) + tspec_fields[i].offset;
if (tspec_fields[i].size == 1)
*value = (*pos & 0xFF);
else if (tspec_fields[i].size == 2)
*value = CAC_GET_LE16(pos);
else
*value = CAC_GET_LE32(pos);
}
return 0;
}
/* Name: get_netdev_for_station
* Desc: Get the pointer to net_device struct with vif_type == FAPI_VIFTYPE_STATION
* sdev: pointer to the slsi_dev struct
* return: pointer to the net_device struct or NULL if the it doesn't exist
*/
static struct net_device *get_netdev_for_station(struct slsi_dev *sdev)
{
struct net_device *dev;
struct netdev_vif *ndev_vif;
s32 vif;
for (vif = 1; vif <= CONFIG_SCSC_WLAN_MAX_INTERFACES; vif++) {
dev = slsi_get_netdev_locked(sdev, vif);
if (!dev)
continue;
ndev_vif = netdev_priv(dev);
if (!ndev_vif)
continue;
if (ndev_vif->vif_type == FAPI_VIFTYPE_STATION &&
ndev_vif->iftype == NL80211_IFTYPE_STATION)
return dev;
}
return NULL;
}
/* Name: add_ebw_ie
* Desc: Add ebw ie
* buf: pointer to buf that the ie is going to added
* buf_len: the byte length of the ie
* tsid: tspec id
* return: length of bytes that were added
*/
static int add_ebw_ie(u8 *buf, size_t buf_len, u8 tsid)
{
u8 *pos;
if ((buf == NULL) || (buf_len < 8))
return -1;
pos = buf;
*pos++ = WLAN_EID_VENDOR_SPECIFIC; /* element id */
*pos++ = 6; /* length */
memcpy(pos, EBW_OUI_TYPE, sizeof(EBW_OUI_TYPE));
pos += sizeof(EBW_OUI_TYPE);
*pos++ = tsid;
*pos++ = 0;
return pos - buf;
}
/* Name: add_tsrs_ie
* Desc: Add tsrs_ie
* buf: pointer to buf that the ie is going to added
* buf_len: the byte length of the ie
* tsid: tspec id
* rates: list of rates that are supported
* num_rates: number of rates that are supported
* return: length of bytes that were added
*/
static int add_tsrs_ie(u8 *buf, size_t buf_len, u8 tsid,
u8 rates[CCX_MAX_NUM_RATES], int num_rates)
{
u8 *pos;
size_t ie_len = (size_t)(7 + num_rates);
int i;
if ((buf == NULL) || (buf_len < ie_len) || (rates == NULL) ||
(num_rates > CCX_MAX_NUM_RATES))
return -1;
pos = buf;
memset(pos, 0, ie_len);
*pos++ = WLAN_EID_VENDOR_SPECIFIC; /* element id */
*pos++ = ie_len - 2; /* length */
memcpy(pos, TSRS_OUI_TYPE, sizeof(TSRS_OUI_TYPE));
pos += sizeof(TSRS_OUI_TYPE);
*pos++ = tsid;
for (i = 0; i < num_rates; i++)
*pos++ = rates[i];
return pos - buf;
}
/* Name: bss_get_ie
* Desc: Get the buffer of an IE that is included in a bss
* bss: pointer to the cfg80211_bss struct
* ie: the IE id that is going to be extracted
* return: pointer to the start of the IE buffer
*/
static const u8 *bss_get_ie(struct cfg80211_bss *bss, u8 ie)
{
const u8 *pos;
u8 ies_len, ies_cur_len;
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0))
pos = (const u8 *)(bss->ies);
ies_len = (u8)bss->ies->len;
#else
pos = (const u8 *)(bss->information_elements);
ies_len = (u8)bss->len_information_elements;
#endif
ies_cur_len = 1;
while (ies_cur_len <= ies_len) {
if (pos[0] == ie)
return pos;
pos += 2 + pos[1];
ies_cur_len++;
}
return NULL;
}
/* Name: bss_get_bit_rates
* Desc: Get the buffer of an IE that is included in a bss
* bss: pointer to the cfg80211_bss struct
* rates: the rates that are supported
* return: 0 (succes), -1 (failure)
*/
static int bss_get_bit_rates(struct cfg80211_bss *bss, u8 **rates)
{
const u8 *ie, *ie2;
int i, j;
unsigned int len;
u8 *r;
ie = bss_get_ie(bss, WLAN_EID_SUPP_RATES);
ie2 = bss_get_ie(bss, WLAN_EID_EXT_SUPP_RATES);
len = (ie ? ie[1] : 0) + (ie2 ? ie2[1] : 0);
if (!len)
return -1;
r = kmalloc(len, GFP_KERNEL);
if (!r)
return -1;
for (i = 0; ie && i < ie[1]; i++)
r[i] = ie[i + 2] & 0x7f;
for (j = 0; ie2 && j < ie2[1]; j++)
r[i + j] = ie2[j + 2] & 0x7f;
*rates = r;
return len;
}
/* Name: cac_send_addts
* Desc: Build and send the ADDTS action frame
* sdev: pointer to the slsi_dev struct
* id: the tspec id that is going to be included in the ADDTS action frame
* ebw: 1 (add ebw IE), 0 (don't add ebw IE)
* return: 0 (succes), -1 (failure)
*/
static int cac_send_addts(struct slsi_dev *sdev, int id, int ebw)
{
struct action_addts_req *req;
size_t extra_ie_len = 50;
int ie_len = 0;
size_t req_len;
struct cac_tspec *entry;
u8 tsid, i;
u8 *rates;
u8 rate = 0;
u8 *pos;
int num_rates;
struct netdev_vif *ndev_vif;
struct net_device *netdev;
u16 host_tag = slsi_tx_host_tag(sdev);
struct ieee80211_hdr *hdr;
u8 *buf = NULL;
u8 *bssid;
u8 r = 0;
entry = find_tspec_entry_by_id(id);
if (entry == NULL) {
SLSI_ERR(sdev, "CAC-ADDTS: Invalid TSPEC ID\n");
return -1;
}
SLSI_MUTEX_LOCK(sdev->netdev_add_remove_mutex);
netdev = get_netdev_for_station(sdev);
if (netdev == NULL) {
SLSI_MUTEX_UNLOCK(sdev->netdev_add_remove_mutex);
return -1;
}
ndev_vif = netdev_priv(netdev);
if ((ndev_vif == NULL) || (ndev_vif->sta.sta_bss == NULL)) {
SLSI_MUTEX_UNLOCK(sdev->netdev_add_remove_mutex);
return -1;
}
SLSI_MUTEX_LOCK(ndev_vif->vif_mutex);
if ((!ndev_vif->activated) || (ndev_vif->vif_type != FAPI_VIFTYPE_STATION) ||
(ndev_vif->sta.vif_status != SLSI_VIF_STATUS_CONNECTED)) {
SLSI_ERR(sdev, "CAC-ADDTS: Not connected, can't send ADDTS\n");
r = -1;
goto exit;
}
bssid = ndev_vif->sta.sta_bss->bssid;
if (entry->accepted) {
SLSI_ERR(sdev, "CAC-ADDTS: TSPEC already accepted\n");
r = -1;
goto exit;
}
buf = kmalloc(IEEE80211_HEADER_SIZE + sizeof(*req) + extra_ie_len, GFP_KERNEL);
if (buf == NULL) {
SLSI_ERR(sdev, "CAC-ADDTS: Failed to allocate ADDTS request\n");
r = -1;
goto exit;
}
hdr = (struct ieee80211_hdr *)buf;
hdr->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, IEEE80211_STYPE_ACTION);
SLSI_ETHER_COPY(hdr->addr1, bssid);
SLSI_ETHER_COPY(hdr->addr2, sdev->hw_addr);
SLSI_ETHER_COPY(hdr->addr3, bssid);
req = (struct action_addts_req *)(buf + IEEE80211_HEADER_SIZE);
req->hdr.category = WLAN_CATEGORY_WMM;
req->hdr.action = WMM_ACTION_CODE_ADDTS_REQ;
if (dialog_token_next == 0)
dialog_token_next++;
req->hdr.dialog_token = dialog_token_next++;
req->hdr.status_code = 0;
tsid = (CAC_GET_LE24(req->tspec.ts_info) >> 1) & 0xF;
/* Find the value of PSB in TSPEC. If PSB is unspecified; fill the
* value from UAPSD value stored in Peer structure for the AC
*/
if (((entry->tspec.ts_info[1] >> 2) & 0xF) == WMM_TSPEC_PSB_UNSPECIFIED) {
struct slsi_peer *peer;
peer = slsi_get_peer_from_qs(sdev, netdev, SLSI_STA_PEER_QUEUESET);
if (!peer) {
SLSI_ERR(sdev, "CAC-ADDTS: no Peer found\n");
r = -1;
goto exit_free_buf;
}
entry->tspec.ts_info[1] |= ((peer->uapsd & BIT(slsi_frame_priority_to_ac_queue(tsid))) << 2);
}
memcpy(&req->tspec, &entry->tspec, sizeof(entry->tspec));
req_len = sizeof(*req);
pos = (u8 *)(req + 1);
entry->ebw = ebw ? 1 : 0;
if (ebw) {
ie_len += add_ebw_ie(pos, extra_ie_len, tsid);
if (ie_len <= 0)
SLSI_ERR(sdev, "CAC-ADDTS: Failed to add EBW IE\n");
}
/* Add tsrs IE in case of ccx enabled bss */
if (ccx_status == BSS_CCX_ENABLED) {
num_rates = bss_get_bit_rates(ndev_vif->sta.sta_bss, &rates);
if (num_rates <= 0)
rate = 12; /* Default to 6Mbps */
else {
for (i = 0; i < num_rates; i++)
if ((rates[i] > rate) && (rates[i] <= 48))
rate = rates[i];
kfree(rates);
}
do {
/* if the nominal rate is equal to minimum_phy_rate
* don't add the tsrs_ie
*/
if ((rate * TSRS_RATE_PER_UNIT) == req->tspec.minimum_phy_rate)
break;
if ((rate * TSRS_RATE_PER_UNIT) > req->tspec.minimum_phy_rate) {
ie_len += add_tsrs_ie(pos + ie_len, extra_ie_len - ie_len,
tsid, &rate, 1);
if (ie_len <= 0) {
SLSI_ERR(sdev, "CAC-ADDTS: Failed to add TSRS IE\n");
r = -1;
goto exit_free_buf;
}
} else { /* only the "<" case is possible */
SLSI_ERR(sdev, "CAC-ADDTS: BSS rate too low\n");
r = -1;
goto exit_free_buf;
}
} while (0);
}
if (slsi_mlme_send_frame_mgmt(sdev, netdev, buf, (IEEE80211_HEADER_SIZE + req_len + ie_len), FAPI_DATAUNITDESCRIPTOR_IEEE802_11_FRAME, FAPI_MESSAGETYPE_IEEE80211_ACTION, host_tag, 0, 0, 0) != 0) {
SLSI_ERR(sdev, "CAC-ADDTS: Failed to send ADDTS request\n");
r = -1;
goto exit_free_buf;
}
entry->dialog_token = req->hdr.dialog_token;
exit_free_buf:
kfree(buf);
exit:
SLSI_MUTEX_UNLOCK(ndev_vif->vif_mutex);
SLSI_MUTEX_UNLOCK(sdev->netdev_add_remove_mutex);
return r;
}
/* Name: cac_send_delts
* Desc: Build and send the DELTS action frame
* sdev: pointer to the slsi_dev struct
* id: the tspec id that is going the DELTS action frame to send for
* return: 0 (succes), -1 (failure)
*/
static int cac_send_delts(struct slsi_dev *sdev, int id)
{
struct action_delts_req *req;
struct cac_tspec *entry;
size_t req_len;
u32 priority, dir;
int rc;
struct netdev_vif *ndev_vif;
struct net_device *netdev;
u16 host_tag = slsi_tx_host_tag(sdev);
struct ieee80211_hdr *hdr;
u8 *buf = NULL;
u8 *bssid;
u8 r = 0;
struct slsi_peer *stapeer;
u16 blockack_control_bitmap = 0;
entry = find_tspec_entry_by_id(id);
if (entry == NULL) {
SLSI_ERR(sdev, "CAC-DELTS: Invalid TSPEC ID\n");
return -1;
}
SLSI_MUTEX_LOCK(sdev->netdev_add_remove_mutex);
netdev = get_netdev_for_station(sdev);
if (netdev == NULL) {
SLSI_MUTEX_UNLOCK(sdev->netdev_add_remove_mutex);
return -1;
}
ndev_vif = netdev_priv(netdev);
if ((ndev_vif == NULL) || (ndev_vif->sta.sta_bss == NULL)) {
SLSI_MUTEX_UNLOCK(sdev->netdev_add_remove_mutex);
return -1;
}
SLSI_MUTEX_LOCK(ndev_vif->vif_mutex);
stapeer = slsi_get_peer_from_qs(sdev, netdev, SLSI_STA_PEER_QUEUESET);
if (WARN_ON(!stapeer)) {
r = -1;
goto exit;
}
if ((!ndev_vif->activated) || (ndev_vif->vif_type != FAPI_VIFTYPE_STATION) ||
(ndev_vif->sta.vif_status != SLSI_VIF_STATUS_CONNECTED)) {
SLSI_ERR(sdev, "CAC-DELTS: Not connected, can't send DELTS\n");
r = -1;
goto exit;
}
if (!entry->accepted) {
SLSI_ERR(sdev, "CAC-DELTS: no TSPEC has been established for tsid=%d\n", entry->id);
r = -1;
goto exit;
}
bssid = ndev_vif->sta.sta_bss->bssid;
buf = kmalloc(24 + sizeof(*req), GFP_KERNEL);
if (buf == NULL) {
SLSI_ERR(sdev, "CAC-DELTS: Failed to allocate DELTS request\n");
r = -1;
goto exit;
}
hdr = (struct ieee80211_hdr *)buf;
hdr->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, IEEE80211_STYPE_ACTION);
SLSI_ETHER_COPY(hdr->addr1, bssid);
SLSI_ETHER_COPY(hdr->addr2, sdev->hw_addr);
SLSI_ETHER_COPY(hdr->addr3, bssid);
req = (struct action_delts_req *)(buf + 24);
req_len = sizeof(*req);
req->hdr.category = WLAN_CATEGORY_WMM;
req->hdr.action = WMM_ACTION_CODE_DELTS;
req->hdr.dialog_token = 0;
req->hdr.status_code = 0;
memcpy(&req->tspec, &entry->tspec, sizeof(entry->tspec));
/* TODO_HARDMAC: If PMF is negotiated over the link, the host shall not
* issue this primitive before pairwise keys have been installed in F/W .
*/
if (slsi_mlme_send_frame_mgmt(sdev, netdev, buf, (IEEE80211_HEADER_SIZE + req_len), FAPI_DATAUNITDESCRIPTOR_IEEE802_11_FRAME, FAPI_MESSAGETYPE_IEEE80211_ACTION, host_tag, 0, 0, 0) != 0) {
SLSI_ERR(sdev, "CAC-DELTS: Failed to send DELTS request\n");
r = -1;
goto exit_free_buf;
}
rc = cac_query_tspec_field(sdev, entry, "user_priority", &priority);
rc |= cac_query_tspec_field(sdev, entry, "direction", &dir);
if (rc != 0)
SLSI_ERR(sdev, "CAC-DELTS: Cannot send DELTS command to driver\n");
if (slsi_mlme_del_traffic_parameters(sdev, netdev, priority) != 0) {
SLSI_ERR(sdev, "CAC-DELTS: Failed to send DELTS request\n");
r = -1;
goto exit_free_buf;
}
/* if the DELTS request is for UP = 4 or 5 then generate a
* MLME-BLOCKACK-CONTROL.request so that no BlockAck is negotiated
* on AC_VI. And leave AC_BE enabled
*/
if (priority == FAPI_PRIORITY_QOS_UP4 || priority == FAPI_PRIORITY_QOS_UP5) {
/* bits for AC_BE should always be set */
blockack_control_bitmap |= FAPI_BLOCKACKCONTROL_BLOCKACK_PRIORITY_0;
blockack_control_bitmap |= FAPI_BLOCKACKCONTROL_BLOCKACK_PRIORITY_3;
if (slsi_mlme_blockack_control_req(sdev, netdev, blockack_control_bitmap,
FAPI_DIRECTION_ANY,
ndev_vif->sta.sta_bss->bssid) != 0) {
SLSI_ERR(sdev, "CAC-DELTS: Failed to send MLME-BLOCKACK-CONTROL request\n");
goto exit_free_buf;
}
}
entry->accepted = 0; /* DELTS sent successfully */
sdev->tspec_error_code = 0;
stapeer->tspec_established &= ~BIT(priority);
if (ccx_status == BSS_CCX_ENABLED && previous_msdu_lifetime != MAX_TRANSMIT_MSDU_LIFETIME_NOT_VALID)
if (slsi_send_max_transmit_msdu_lifetime(sdev, netdev, previous_msdu_lifetime) != 0) {
SLSI_ERR(sdev, "CAC-DELTS: slsi_send_max_msdu_lifetime failed");
goto exit_free_buf;
}
exit_free_buf:
kfree(buf);
exit:
SLSI_MUTEX_UNLOCK(ndev_vif->vif_mutex);
SLSI_MUTEX_UNLOCK(sdev->netdev_add_remove_mutex);
return r;
}
/* Name: cac_create_tspec
* Desc: Create a tspec entry and added it to the tspec list
* sdev: pointer to the slsi_dev struct
* id: the id of the tspec that is included in DELTS action frame
* return: 0 (succes), -1 (failure)
*/
static int cac_create_tspec(struct slsi_dev *sdev, char *args)
{
struct cac_tspec *entry;
int id;
u8 tid_auto_done = 0;
struct netdev_vif *ndev_vif;
struct net_device *netdev;
SLSI_MUTEX_LOCK(sdev->netdev_add_remove_mutex);
netdev = get_netdev_for_station(sdev);
if (netdev == NULL) {
SLSI_MUTEX_UNLOCK(sdev->netdev_add_remove_mutex);
return -1;
}
ndev_vif = netdev_priv(netdev);
if (ndev_vif == NULL) {
SLSI_MUTEX_UNLOCK(sdev->netdev_add_remove_mutex);
return -1;
}
SLSI_MUTEX_LOCK(ndev_vif->vif_mutex);
if ((!ndev_vif->activated) || (ndev_vif->vif_type != FAPI_VIFTYPE_STATION) ||
(ndev_vif->sta.vif_status != SLSI_VIF_STATUS_CONNECTED)) {
SLSI_ERR(sdev, "CAC-ADDTS: Not connected, can't create TSPEC\n");
SLSI_MUTEX_UNLOCK(ndev_vif->vif_mutex);
SLSI_MUTEX_UNLOCK(sdev->netdev_add_remove_mutex);
return -1;
}
SLSI_MUTEX_UNLOCK(ndev_vif->vif_mutex);
SLSI_MUTEX_UNLOCK(sdev->netdev_add_remove_mutex);
if (args == NULL) {
/* No input for tid, so we use the auto increment*/
if (tspec_list_next_id <= 7) {
id = tspec_list_next_id++;
} else {
id = 0;
tspec_list_next_id = 0;
tspec_list_next_id++;
}
tid_auto_done = 1;
}
if ((!tid_auto_done) && (strtoint(args, &id) < 0)) {
/* Invalid input for tid, so we use the auto increment*/
if (tspec_list_next_id <= 7) {
id = tspec_list_next_id++;
} else {
id = 0;
tspec_list_next_id = 0;
tspec_list_next_id++;
}
}
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (entry == NULL) {
SLSI_ERR(sdev, "CAC: Failed to allocate TSPEC\n");
return -1;
}
entry->tspec.eid = WLAN_EID_VENDOR_SPECIFIC;
entry->tspec.length = sizeof(entry->tspec) - sizeof(entry->tspec.eid) - sizeof(entry->tspec.length);
CAC_PUT_BE24(entry->tspec.oui, WLAN_OUI_MICROSOFT);
entry->tspec.oui_type = WLAN_OUI_TYPE_MICROSOFT_WMM;
entry->tspec.oui_subtype = WMM_OUI_SUBTYPE_TSPEC_ELEMENT;
entry->tspec.version = WMM_VERSION;
entry->accepted = 0;
if (id >= TSID_MIN && id <= TSID_MAX) {
entry->id = id;
} else {
SLSI_ERR(sdev, "CAC: Invalid TSID, must be in range 0-7\n");
kfree(entry);
return -1;
}
entry->next = tspec_list;
tspec_list = entry;
return entry->id;
}
/* Name: cac_delete_tspec
* Desc: delete a tspec from the list of the tspecs
* sdev: pointer to the slsi_dev struct
* id: the id of the tspec that will be deleted
* return: 0 (succes), -1 (failure)
*/
static int cac_delete_tspec(struct slsi_dev *sdev, int id)
{
struct cac_tspec *itr;
struct cac_tspec *prev;
itr = tspec_list;
prev = NULL;
while (itr != NULL) {
if (itr->id == id) {
if (prev)
prev->next = itr->next;
else
tspec_list = itr->next;
if (itr->accepted)
cac_send_delts(sdev, itr->id);
kfree(itr);
return 0;
}
prev = itr;
itr = itr->next;
}
SLSI_ERR(sdev, "CAC: Couldn't find TSPEC with ID %u", id);
return -1;
}
/* Name: cac_config_tspec
* Desc: Set a field's value of a tspec
* sdev: pointer to the slsi_dev struct
* id: the id of the tspec that will be configured
* field: the field name that will be changed
* value: the value of the field
* return: 0 (succes), -1 (failure)
*/
static int cac_config_tspec(struct slsi_dev *sdev, int id, const char *field, u32 value)
{
struct cac_tspec *entry;
int i;
u32 max = 0xFFFFFFFF;
u32 tsinfo;
u8 mask;
u8 *pos;
if (field == NULL)
return -1;
entry = find_tspec_entry_by_id(id);
if (entry == NULL) {
SLSI_ERR(sdev, "CAC: Invalid TSPEC ID\n");
return -1;
}
for (i = 0; i < NUM_TSPEC_FIELDS; i++)
if (strcasecmp(field, tspec_fields[i].name) == 0)
break;
if (i >= NUM_TSPEC_FIELDS) {
SLSI_ERR(sdev, "CAC: Invalid TSPEC config field\n");
return -1;
}
if (tspec_fields[i].read_only) {
SLSI_ERR(sdev, "CAC: TSPEC field is read-only\n");
return -1;
}
if (tspec_fields[i].is_tsinfo_field) {
mask = tspec_fields[i].size;
if (value > mask) {
SLSI_ERR(sdev, "CAC: TSPEC config value exceeded maximum\n");
return -1;
}
tsinfo = CAC_GET_LE24(&entry->tspec.ts_info[0]);
tsinfo &= ~(u32)(mask << tspec_fields[i].offset);
tsinfo |= (u32)((value & mask) << tspec_fields[i].offset);
CAC_PUT_LE24(&entry->tspec.ts_info[0], tsinfo);
} else {
if (tspec_fields[i].size < 4)
max = ((1 << (tspec_fields[i].size * 8)) - 1);
if (value > max) {
SLSI_ERR(sdev, "CAC: TSPEC config value exceeded maximum\n");
return -1;
}
pos = (u8 *)(&entry->tspec) + tspec_fields[i].offset;
if (tspec_fields[i].size == 1)
*pos = (value & 0xFF);
else if (tspec_fields[i].size == 2)
CAC_PUT_LE16(pos, value);
else
CAC_PUT_LE32(pos, value);
}
return 0;
}
/* Name: cac_ctrl_create_tspec
* Desc: public function to create tspec
* sdev: pointer to the slsi_dev struct
* return: tspec id
*/
int cac_ctrl_create_tspec(struct slsi_dev *sdev, char *args)
{
int id;
id = cac_create_tspec(sdev, args);
if (id < 0)
return -1;
return id;
}
/* Name: cac_ctrl_delete_tspec
* Desc: public function to delete tspec
* sdev: pointer to the slsi_dev struct
* args:pointer to a buffer that contains the agrs for deleting tspec from the list
* return: 0 (succes), -1 (failure)
*/
int cac_ctrl_delete_tspec(struct slsi_dev *sdev, char *args)
{
int id;
if (strtoint(args, &id) < 0) {
SLSI_ERR(sdev, "CAC-DELETE-TSPEC: Invalid TSPEC ID\n");
return -1;
}
if (cac_delete_tspec(sdev, id) < 0)
return -1;
return 0;
}
/* Name: cac_ctrl_config_tspec
* Desc: public function to configure a tspec
* sdev: pointer to the slsi_dev struct
* args: pointer to a buffer that contains the agrs for tspec configuration
* return: 0 (succes), -1 (failure)
*/
int cac_ctrl_config_tspec(struct slsi_dev *sdev, char *args)
{
char *id;
char *field;
char *value;
int tspec_id;
u32 val;
id = args;
field = strchr(id, ' ');
if (field == NULL) {
SLSI_ERR(sdev, "CAC: field string is NULL\n");
return -1;
}
*field++ = '\0';
value = strchr(field, ' ');
if (value == NULL) {
SLSI_ERR(sdev, "CAC: field value is NULL\n");
return -1;
}
*value++ = '\0';
if (strtoint(id, &tspec_id) < 0) {
SLSI_ERR(sdev, "CAC: Conversion error for tspecid\n");
return -1;
}
if (strtoint(value, &val) < 0) {
SLSI_ERR(sdev, "CAC: Conversion error for tspecid value\n");
return -1;
}
if (cac_config_tspec(sdev, tspec_id, field, val) < 0)
return -1;
return 0;
}
/* Name: cac_ctrl_send_addts
* Desc: public function to send ADDTS action frame
* sdev: pointer to the slsi_dev struct
* args: buffer that contains the agrs for ADDTS request
* return: 0 (succes), -1 (failure)
*/
int cac_ctrl_send_addts(struct slsi_dev *sdev, char *args)
{
char *id_str;
char *ebw_str;
int id;
int ebw = 0;
if (args == NULL)
return -1;
id_str = args;
ebw_str = strchr(id_str, ' ');
if (ebw_str != NULL) {
*ebw_str++ = '\0';
if (!strncmp(ebw_str, "ebw", 3))
ebw = 1;
}
if (strtoint(id_str, &id) < 0) {
SLSI_ERR(sdev, "CAC: Conversion error for tspecid value\n");
return -1;
}
if (cac_send_addts(sdev, id, ebw) < 0)
return -1;
return 0;
}
/* Name: cac_ctrl_send_delts
* Desc: public function to send DELTS action frame
* sdev: pointer to the slsi_dev struct
* args: buffer that contains the agrs for DELTS request
* return: 0 (succes), -1 (failure)
*/
int cac_ctrl_send_delts(struct slsi_dev *sdev, char *args)
{
int id;
if (args == NULL)
return -1;
if (strtoint(args, &id) < 0) {
SLSI_ERR(sdev, "CAC: Invalid TSPEC ID\n");
return -1;
}
if (cac_send_delts(sdev, id) < 0)
return -1;
return 0;
}
/* Name: cac_process_delts_req
* Desc: process a DELTS request
* sdev: pointer to the slsi_dev struct
* req: buffer of the DELTS request
* return: 0 (succes), -1 (failure)
*/
static void cac_process_delts_req(struct slsi_dev *sdev, struct net_device *netdev, struct action_delts_req *req)
{
struct netdev_vif *ndev_vif = netdev_priv(netdev);
struct cac_tspec *itr;
u32 priority, dir;
int rc;
u16 blockack_control_bitmap = 0;
struct slsi_peer *stapeer;
itr = find_tspec_entry_by_tspec(&req->tspec);
if (itr == NULL) {
SLSI_ERR(sdev, "CAC: No matching TSPEC found\n");
return;
}
WARN_ON(!SLSI_MUTEX_IS_LOCKED(ndev_vif->vif_mutex));
stapeer = slsi_get_peer_from_qs(sdev, netdev, SLSI_STA_PEER_QUEUESET);
if (WARN_ON(!stapeer))
return;
rc = cac_query_tspec_field(sdev, itr, "user_priority", &priority);
rc |= cac_query_tspec_field(sdev, itr, "direction", &dir);
if (rc != 0) {
SLSI_ERR(sdev, "CAC: Cannot send DELTS command to driver\n");
return;
}
if ((!ndev_vif->activated) || (ndev_vif->vif_type != FAPI_VIFTYPE_STATION) ||
(ndev_vif->sta.vif_status != SLSI_VIF_STATUS_CONNECTED) || (ndev_vif->sta.sta_bss == NULL)) {
SLSI_ERR(sdev, "CAC: Not connected, can't send DELTS\n");
return;
}
if (slsi_mlme_del_traffic_parameters(sdev, netdev, priority) != 0) {
SLSI_ERR(sdev, "CAC: Failed to send DEL-TRAFFIC_PARAMETERS request\n");
return;
}
/* if the DELTS request is for UP = 4 or 5 then generate a
* MLME-BLOCKACK-CONTROL.request so that no BlockAck is negotiated
* on AC_VI. And leave AC_BE enabled
*/
if (priority == FAPI_PRIORITY_QOS_UP4 || priority == FAPI_PRIORITY_QOS_UP5) {
/* bits for AC_BE should always be set */
blockack_control_bitmap |= FAPI_BLOCKACKCONTROL_BLOCKACK_PRIORITY_0;
blockack_control_bitmap |= FAPI_BLOCKACKCONTROL_BLOCKACK_PRIORITY_3;
if (slsi_mlme_blockack_control_req(sdev, netdev, blockack_control_bitmap,
FAPI_DIRECTION_ANY,
ndev_vif->sta.sta_bss->bssid) != 0) {
SLSI_ERR(sdev, "CAC: Failed to send MLME-BLOCKACK-CONTROL request\n");
return;
}
}
itr->accepted = 0; /* del_tspec sent successfully */
stapeer->tspec_established &= ~BIT(priority);
if (ccx_status == BSS_CCX_ENABLED && previous_msdu_lifetime != MAX_TRANSMIT_MSDU_LIFETIME_NOT_VALID)
if (slsi_send_max_transmit_msdu_lifetime(sdev, netdev, previous_msdu_lifetime) != 0) {
SLSI_ERR(sdev, "CAC: slsi_send_max_msdu_lifetime failed");
return;
}
}
/* Name: cac_find_edca_ie
* Desc: Finds the edca IE in the ADDTS response action frame
* sdev: pointer to the slsi_dev struct
* ie: buffer of the edca IE
* tsid: the tsid that is included in the edca IE
* lifetime: the lifetime value that is included in the edca IE
* return: 0 (succes), -1 (failure)
*/
static int cac_find_edca_ie(const u8 *ie, size_t ie_len, u8 *tsid, u16 *lifetime)
{
const u8 *pos = ie;
if ((ie == NULL) || (ie_len < 9) ||
(tsid == NULL) || (lifetime == NULL))
return -1;
pos = cfg80211_find_vendor_ie(WLAN_OUI_CISCO, WLAN_OUI_TYPE_CISCO_EDCA, ie, ie_len);
if (pos && (pos + 9 <= ie + ie_len)) {
*tsid = pos[6];
*lifetime = CAC_GET_LE16(&pos[7]);
return 0;
}
return -1;
}
/* Name: cac_process_addts_rsp
* Desc: parsing of the addts response
* sdev: pointer to the slsi_dev struct
* rsp: the buffer of the ADDTS response received
* ie_len: the length of the buffer
* return: 0 (succes), -1 (failure)
*/
static void cac_process_addts_rsp(struct slsi_dev *sdev, struct net_device *netdev, struct action_addts_rsp *rsp, const u8 *ie, size_t ie_len)
{
struct netdev_vif *ndev_vif = netdev_priv(netdev);
struct cac_tspec *itr;
struct wmm_tspec_element *tspec;
u32 priority, dir, psb;
int rc;
u8 tsid;
u16 msdu_lifetime;
u16 blockack_control_bitmap = 0;
struct slsi_peer *stapeer;
WARN_ON(!SLSI_MUTEX_IS_LOCKED(ndev_vif->vif_mutex));
stapeer = slsi_get_peer_from_qs(sdev, netdev, SLSI_STA_PEER_QUEUESET);
if (WARN_ON(!stapeer))
goto exit;
itr = tspec_list;
while (itr != NULL) {
if (itr->dialog_token == rsp->hdr.dialog_token)
break;
itr = itr->next;
}
if (itr == NULL) {
SLSI_ERR(sdev, "CAC: No matching TSPEC found\n");
goto exit;
}
if (rsp->hdr.status_code != ADDTS_STATUS_ACCEPTED) {
SLSI_ERR(sdev, "CAC: TSPEC rejected (status=0x%02X)", rsp->hdr.status_code);
goto exit;
}
rc = cac_query_tspec_field(sdev, itr, "user_priority", &priority);
rc |= cac_query_tspec_field(sdev, itr, "direction", &dir);
rc |= cac_query_tspec_field(sdev, itr, "psb", &psb);
if (rc != 0) {
SLSI_ERR(sdev, "CAC: Cannot send ADDTS command to driver");
goto exit;
}
if ((ccx_status == BSS_CCX_ENABLED) && cac_find_edca_ie(ie, ie_len, &tsid, &msdu_lifetime) != 0)
msdu_lifetime = MSDU_LIFETIME_DEFAULT;
tspec = (struct wmm_tspec_element *)(rsp + 1);
if ((!ndev_vif->activated) || (ndev_vif->vif_type != FAPI_VIFTYPE_STATION) ||
(ndev_vif->sta.vif_status != SLSI_VIF_STATUS_CONNECTED) || (ndev_vif->sta.sta_bss == NULL)) {
SLSI_ERR(sdev, "CAC: Not connected, INVALID state for ADDTS response\n");
goto exit;
}
switch (priority) {
/*AC_BK*/
case FAPI_PRIORITY_QOS_UP1:
if (stapeer->tspec_established & BIT(FAPI_PRIORITY_QOS_UP2))
goto exit_with_error;
break;
case FAPI_PRIORITY_QOS_UP2:
if (stapeer->tspec_established & BIT(FAPI_PRIORITY_QOS_UP1))
goto exit_with_error;
break;
/*AC_BE*/
case FAPI_PRIORITY_QOS_UP0:
if (stapeer->tspec_established & BIT(FAPI_PRIORITY_QOS_UP3))
goto exit_with_error;
break;
case FAPI_PRIORITY_QOS_UP3:
if (stapeer->tspec_established & BIT(FAPI_PRIORITY_QOS_UP0))
goto exit_with_error;
break;
/*AC_VI*/
case FAPI_PRIORITY_QOS_UP4:
if (stapeer->tspec_established & BIT(FAPI_PRIORITY_QOS_UP5))
goto exit_with_error;
break;
case FAPI_PRIORITY_QOS_UP5:
if (stapeer->tspec_established & BIT(FAPI_PRIORITY_QOS_UP4))
goto exit_with_error;
break;
/*AC_VO*/
case FAPI_PRIORITY_QOS_UP6:
if (stapeer->tspec_established & BIT(FAPI_PRIORITY_QOS_UP7))
goto exit_with_error;
break;
case FAPI_PRIORITY_QOS_UP7:
if (stapeer->tspec_established & BIT(FAPI_PRIORITY_QOS_UP6))
goto exit_with_error;
break;
/* invalid*/
default:
SLSI_ERR(sdev, "CAC: Invalid UP in the request\n");
goto exit;
}
if (slsi_mlme_set_traffic_parameters(sdev, netdev, priority, tspec->medium_time, tspec->minimum_data_rate, ndev_vif->sta.sta_bss->bssid) != 0) {
SLSI_ERR(sdev, "CAC: Failed to send SET_TRAFFIC_PARAMETERS request\n");
goto exit;
}
/* Currently the firmware autonomously negotiates BlockAck agreement for AC_BE.
* It is required for WMM-AC certification to use BlockAck for AC_VI.
* So if a TSPEC for AC_VI (UP = 5 0r 4) is successfully negotiated, the host
* generates an MLME-BLOCKACK-CONTROL.request, identifying that a BlockAck for the
* corresponding Priority (direction set to Any) should be enabled, i.e. the F/W
* will accept a downlink requested BlockAck Request, and will try to set-up an
* uplink BlockAck Request for that priority (TID).
*/
if (priority == FAPI_PRIORITY_QOS_UP4 || priority == FAPI_PRIORITY_QOS_UP5) {
/* bits for AC_BE should always be set */
blockack_control_bitmap |= FAPI_BLOCKACKCONTROL_BLOCKACK_PRIORITY_0;
blockack_control_bitmap |= FAPI_BLOCKACKCONTROL_BLOCKACK_PRIORITY_3;
if (priority == FAPI_PRIORITY_QOS_UP4)
blockack_control_bitmap |= FAPI_BLOCKACKCONTROL_BLOCKACK_PRIORITY_4;
else
blockack_control_bitmap |= FAPI_BLOCKACKCONTROL_BLOCKACK_PRIORITY_5;
if (slsi_mlme_blockack_control_req(sdev, netdev, blockack_control_bitmap,
FAPI_DIRECTION_ANY,
ndev_vif->sta.sta_bss->bssid) != 0) {
SLSI_ERR(sdev, "CAC: Failed to send MLME-BLOCKACK-CONTROL request\n");
goto exit;
}
}
/* Add store in MIB the msdu_lifetime value in case of ccx enabled bss */
if (ccx_status == BSS_CCX_ENABLED) {
if ((slsi_read_max_transmit_msdu_lifetime(sdev, netdev, &previous_msdu_lifetime)) != 0) {
previous_msdu_lifetime = MAX_TRANSMIT_MSDU_LIFETIME_NOT_VALID;
SLSI_ERR(sdev, "CAC: slsi_read_max_msdu_lifetime failed");
goto exit;
}
if (slsi_send_max_transmit_msdu_lifetime(sdev, netdev, msdu_lifetime) != 0) {
SLSI_ERR(sdev, "CAC: slsi_send_max_msdu_lifetime failed");
goto exit;
}
}
itr->accepted = 1; /* add_tspec sent successfully */
sdev->tspec_error_code = 0;
stapeer->tspec_established |= BIT(priority);
goto exit;
exit_with_error:
SLSI_ERR(sdev, "CAC: Cannot set UP for same AC for which UP is already set\n");
exit:
return;
}
/* Name: cac_rx_wmm_action
* Desc: Get the action frame received and call the corresponding process routine
* sdev: pointer to the slsi_dev struct
* data: buffer to the action frame received
* len: the length in bytes of the action frame
*/
void cac_rx_wmm_action(struct slsi_dev *sdev, struct net_device *netdev, struct ieee80211_mgmt *data, size_t len)
{
struct ieee80211_mgmt *mgmt = data;
struct action_addts_rsp *addts;
if ((sdev == NULL) || (data == NULL) || (netdev == NULL) || (len == 0))
return;
if (mgmt->u.action.u.wme_action.action_code == WMM_ACTION_CODE_ADDTS_RESP) {
addts = (struct action_addts_rsp *)&mgmt->u.action;
cac_process_addts_rsp(sdev, netdev, addts, mgmt->u.action.u.wme_action.variable, len - sizeof(*addts) + 1);
} else if (mgmt->u.action.u.wme_action.action_code == WMM_ACTION_CODE_DELTS) {
cac_process_delts_req(sdev, netdev, (struct action_delts_req *)&mgmt->u.action);
}
}
/* Name: cac_get_active_tspecs
* Desc:
* tspecs: the list of active tspecs
* return: 0 (succes), -1 (failure)
*/
int cac_get_active_tspecs(struct cac_activated_tspec **tspecs)
{
struct cac_tspec *itr = tspec_list;
int count = 0;
int i = 0;
if (tspecs == NULL)
return -1;
while (itr != NULL) {
if (itr->accepted)
count++;
itr = itr->next;
}
*tspecs = kmalloc_array((size_t)count, sizeof(struct cac_activated_tspec), GFP_KERNEL);
itr = tspec_list;
while (itr != NULL) {
if (itr->accepted) {
tspecs[i]->ebw = itr->ebw;
memcpy(&tspecs[i]->tspec, &itr->tspec, sizeof(itr->tspec));
i++;
}
itr = itr->next;
}
return count;
}
/*********************************************************
* call cac_deactivate_tspecs to deactivate all tspecs
* when the device is disconnecting
*/
/* Name: cac_deactivate_tspecs
* Desc:
* sdev: pointer to the slsi_dev struct
* return: 0 (succes), -1 (failure)
*/
void cac_deactivate_tspecs(struct slsi_dev *sdev)
{
struct cac_tspec *itr = tspec_list;
struct cac_tspec *temp = NULL;
SLSI_UNUSED_PARAMETER(sdev);
while (itr != NULL) {
itr->accepted = 0;
itr->dialog_token = 0;
temp = itr;
itr = itr->next;
kfree(temp);
}
tspec_list = NULL;
}
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