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Subject[PATCH v3 14/18] wcn36xx: Implement multicast filtering
Date
From: Pontus Fuchs <pontus.fuchs@gmail.com>

Pass the multicast list to FW.

This patch also adds a way to build the smd command in place. This is
needed because the MC list command is too big for the stack.

Signed-off-by: Pontus Fuchs <pontus.fuchs@gmail.com>
[bjorn: dropped FIF_PROMISC_IN_BSS usage]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
drivers/net/wireless/ath/wcn36xx/hal.h | 6 ++--
drivers/net/wireless/ath/wcn36xx/main.c | 50 ++++++++++++++++++++++++++++++--
drivers/net/wireless/ath/wcn36xx/smd.c | 51 +++++++++++++++++++++++++++++++++
drivers/net/wireless/ath/wcn36xx/smd.h | 3 ++
4 files changed, 104 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/ath/wcn36xx/hal.h b/drivers/net/wireless/ath/wcn36xx/hal.h
index 433d9801a0ae..ec64c47f918b 100644
--- a/drivers/net/wireless/ath/wcn36xx/hal.h
+++ b/drivers/net/wireless/ath/wcn36xx/hal.h
@@ -4267,9 +4267,9 @@ struct wcn36xx_hal_rcv_flt_mc_addr_list_type {
u8 data_offset;

u32 mc_addr_count;
- u8 mc_addr[ETH_ALEN][WCN36XX_HAL_MAX_NUM_MULTICAST_ADDRESS];
+ u8 mc_addr[WCN36XX_HAL_MAX_NUM_MULTICAST_ADDRESS][ETH_ALEN];
u8 bss_index;
-};
+} __packed;

struct wcn36xx_hal_set_pkt_filter_rsp_msg {
struct wcn36xx_hal_msg_header header;
@@ -4323,7 +4323,7 @@ struct wcn36xx_hal_rcv_flt_pkt_clear_rsp_msg {
struct wcn36xx_hal_rcv_flt_pkt_set_mc_list_req_msg {
struct wcn36xx_hal_msg_header header;
struct wcn36xx_hal_rcv_flt_mc_addr_list_type mc_addr_list;
-};
+} __packed;

struct wcn36xx_hal_rcv_flt_pkt_set_mc_list_rsp_msg {
struct wcn36xx_hal_msg_header header;
diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
index 253cece1b660..c0ba7b0775b3 100644
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -287,6 +287,7 @@ static int wcn36xx_start(struct ieee80211_hw *hw)
}

wcn36xx_detect_chip_version(wcn);
+ wcn36xx_smd_update_cfg(wcn, WCN36XX_HAL_CFG_ENABLE_MC_ADDR_LIST, 1);

/* DMA channel initialization */
ret = wcn36xx_dxe_init(wcn);
@@ -354,15 +355,57 @@ static int wcn36xx_config(struct ieee80211_hw *hw, u32 changed)
return 0;
}

-#define WCN36XX_SUPPORTED_FILTERS (0)
-
static void wcn36xx_configure_filter(struct ieee80211_hw *hw,
unsigned int changed,
unsigned int *total, u64 multicast)
{
+ struct wcn36xx_hal_rcv_flt_mc_addr_list_type *fp;
+ struct wcn36xx *wcn = hw->priv;
+ struct wcn36xx_vif *tmp;
+ struct ieee80211_vif *vif = NULL;
+
wcn36xx_dbg(WCN36XX_DBG_MAC, "mac configure filter\n");

- *total &= WCN36XX_SUPPORTED_FILTERS;
+ *total &= FIF_ALLMULTI;
+
+ fp = (void *)(unsigned long)multicast;
+ list_for_each_entry(tmp, &wcn->vif_list, list) {
+ vif = wcn36xx_priv_to_vif(tmp);
+
+ /* FW handles MC filtering only when connected as STA */
+ if (*total & FIF_ALLMULTI)
+ wcn36xx_smd_set_mc_list(wcn, vif, NULL);
+ else if (NL80211_IFTYPE_STATION == vif->type && tmp->sta_assoc)
+ wcn36xx_smd_set_mc_list(wcn, vif, fp);
+ }
+ kfree(fp);
+}
+
+static u64 wcn36xx_prepare_multicast(struct ieee80211_hw *hw,
+ struct netdev_hw_addr_list *mc_list)
+{
+ struct wcn36xx_hal_rcv_flt_mc_addr_list_type *fp;
+ struct netdev_hw_addr *ha;
+
+ wcn36xx_dbg(WCN36XX_DBG_MAC, "mac prepare multicast list\n");
+ fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
+ if (!fp) {
+ wcn36xx_err("Out of memory setting filters.\n");
+ return 0;
+ }
+
+ fp->mc_addr_count = 0;
+ /* update multicast filtering parameters */
+ if (netdev_hw_addr_list_count(mc_list) <=
+ WCN36XX_HAL_MAX_NUM_MULTICAST_ADDRESS) {
+ netdev_hw_addr_list_for_each(ha, mc_list) {
+ memcpy(fp->mc_addr[fp->mc_addr_count],
+ ha->addr, ETH_ALEN);
+ fp->mc_addr_count++;
+ }
+ }
+
+ return (u64)(unsigned long)fp;
}

static void wcn36xx_tx(struct ieee80211_hw *hw,
@@ -920,6 +963,7 @@ static const struct ieee80211_ops wcn36xx_ops = {
.resume = wcn36xx_resume,
#endif
.config = wcn36xx_config,
+ .prepare_multicast = wcn36xx_prepare_multicast,
.configure_filter = wcn36xx_configure_filter,
.tx = wcn36xx_tx,
.set_key = wcn36xx_set_key,
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c
index e0d5631657c1..b1bdc229e560 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.c
+++ b/drivers/net/wireless/ath/wcn36xx/smd.c
@@ -271,6 +271,16 @@ out:
return ret;
}

+static void init_hal_msg(struct wcn36xx_hal_msg_header *hdr,
+ enum wcn36xx_hal_host_msg_type msg_type,
+ size_t msg_size)
+{
+ memset(hdr, 0, msg_size + sizeof(*hdr));
+ hdr->msg_type = msg_type;
+ hdr->msg_version = WCN36XX_HAL_MSG_VERSION0;
+ hdr->len = msg_size + sizeof(*hdr);
+}
+
#define INIT_HAL_MSG(msg_body, type) \
do { \
memset(&msg_body, 0, sizeof(msg_body)); \
@@ -2144,6 +2154,46 @@ out:
mutex_unlock(&wcn->hal_mutex);
return ret;
}
+
+int wcn36xx_smd_set_mc_list(struct wcn36xx *wcn,
+ struct ieee80211_vif *vif,
+ struct wcn36xx_hal_rcv_flt_mc_addr_list_type *fp)
+{
+ struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
+ struct wcn36xx_hal_rcv_flt_pkt_set_mc_list_req_msg *msg_body = NULL;
+ int ret = 0;
+
+ mutex_lock(&wcn->hal_mutex);
+
+ msg_body = (struct wcn36xx_hal_rcv_flt_pkt_set_mc_list_req_msg *)
+ wcn->hal_buf;
+ init_hal_msg(&msg_body->header, WCN36XX_HAL_8023_MULTICAST_LIST_REQ,
+ sizeof(msg_body->mc_addr_list));
+
+ /* An empty list means all mc traffic will be received */
+ if (fp)
+ memcpy(&msg_body->mc_addr_list, fp,
+ sizeof(msg_body->mc_addr_list));
+ else
+ msg_body->mc_addr_list.mc_addr_count = 0;
+
+ msg_body->mc_addr_list.bss_index = vif_priv->bss_index;
+
+ ret = wcn36xx_smd_send_and_wait(wcn, msg_body->header.len);
+ if (ret) {
+ wcn36xx_err("Sending HAL_8023_MULTICAST_LIST failed\n");
+ goto out;
+ }
+ ret = wcn36xx_smd_rsp_status_check(wcn->hal_buf, wcn->hal_rsp_len);
+ if (ret) {
+ wcn36xx_err("HAL_8023_MULTICAST_LIST rsp failed err=%d\n", ret);
+ goto out;
+ }
+out:
+ mutex_unlock(&wcn->hal_mutex);
+ return ret;
+}
+
static void wcn36xx_smd_rsp_process(struct wcn36xx *wcn, void *buf, size_t len)
{
struct wcn36xx_hal_msg_header *msg_header = buf;
@@ -2185,6 +2235,7 @@ static void wcn36xx_smd_rsp_process(struct wcn36xx *wcn, void *buf, size_t len)
case WCN36XX_HAL_UPDATE_SCAN_PARAM_RSP:
case WCN36XX_HAL_CH_SWITCH_RSP:
case WCN36XX_HAL_FEATURE_CAPS_EXCHANGE_RSP:
+ case WCN36XX_HAL_8023_MULTICAST_LIST_RSP:
memcpy(wcn->hal_buf, buf, len);
wcn->hal_rsp_len = len;
complete(&wcn->hal_rsp_compl);
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.h b/drivers/net/wireless/ath/wcn36xx/smd.h
index 8361f9e3995b..c1b76d75cf85 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.h
+++ b/drivers/net/wireless/ath/wcn36xx/smd.h
@@ -136,4 +136,7 @@ int wcn36xx_smd_del_ba(struct wcn36xx *wcn, u16 tid, u8 sta_index);
int wcn36xx_smd_trigger_ba(struct wcn36xx *wcn, u8 sta_index);

int wcn36xx_smd_update_cfg(struct wcn36xx *wcn, u32 cfg_id, u32 value);
+int wcn36xx_smd_set_mc_list(struct wcn36xx *wcn,
+ struct ieee80211_vif *vif,
+ struct wcn36xx_hal_rcv_flt_mc_addr_list_type *fp);
#endif /* _SMD_H_ */
--
2.5.0
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