wil6210: initialize TX and RX enhanced DMA rings

Enhanced DMA design includes the following rings:
- Single RX descriptor ring is used for all VIFs
- Multiple RX status rings are supported, to allow RSS
- TX descriptor ring is allocated per connection
- A single TX status ring is used for all TX descriptor rings

This patch initializes and frees the above descriptor and
status rings.

The RX SKBs are handled by a new entity of RX buffers manager,
which handles RX buffers, each one points to an allocated SKB.
During Rx completion processing, the driver extracts a buffer
ID which is used as an index to the buffers array.
After the SKB is freed the buffer is moved from the 'active'
list to the 'free' list, indicating it can be used for another
descriptor. During Rx refill, SKBs are allocated and attached
to 'free' buffers. Those buffers are attached to new descriptors
and moved to the 'active' list.

New debugfs entries were added to allow edma configuration:

Run the following command to configure the number of status rings:
echo NUM_OF_STATUS_RINGS > num_rx_status_rings

Run the following command to use extended RX status message for
additional debug fields from HW:
echo 0 > compressed_rx_status

Run the following command to control the size of the TX status ring:
echo TX_STATUS_RING_ORDER > tx_status_ring_order
The status ring size will be 1 << tx_status_ring_order

Run the following command to control the size of the RX status ring:
echo RX_STATUS_RING_ORDER > rx_status_ring_order
Due to HW constrains RX sring order should be bigger than RX ring order
The status ring size will be 1 << rx_status_ring_order

Run the following command to change the number of RX buffer IDs:
echo RX_BUFF_ID_COUNT > rx_buff_id_count

Signed-off-by: Gidon Studinski <gidons@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 299 insertions, 17 deletions

diff --git a/drivers/net/wireless/ath/wil6210/wmi.c b/drivers/net/wireless/ath/wil6210/wmi.c
index 1cf802101dd9..b2e966df57f5 100644
--- a/drivers/net/wireless/ath/wil6210/wmi.c
+++ b/drivers/net/wireless/ath/wil6210/wmi.c
@@ -420,10 +420,10 @@ static const char *cmdid2name(u16 cmdid)
 		return "WMI_DEL_STA_CMD";
 	case WMI_DISCONNECT_STA_CMDID:
 		return "WMI_DISCONNECT_STA_CMD";
-	case WMI_VRING_BA_EN_CMDID:
-		return "WMI_VRING_BA_EN_CMD";
-	case WMI_VRING_BA_DIS_CMDID:
-		return "WMI_VRING_BA_DIS_CMD";
+	case WMI_RING_BA_EN_CMDID:
+		return "WMI_RING_BA_EN_CMD";
+	case WMI_RING_BA_DIS_CMDID:
+		return "WMI_RING_BA_DIS_CMD";
 	case WMI_RCP_DELBA_CMDID:
 		return "WMI_RCP_DELBA_CMD";
 	case WMI_RCP_ADDBA_RESP_CMDID:
@@ -450,6 +450,18 @@ static const char *cmdid2name(u16 cmdid)
 		return "WMI_START_SCHED_SCAN_CMD";
 	case WMI_STOP_SCHED_SCAN_CMDID:
 		return "WMI_STOP_SCHED_SCAN_CMD";
+	case WMI_TX_STATUS_RING_ADD_CMDID:
+		return "WMI_TX_STATUS_RING_ADD_CMD";
+	case WMI_RX_STATUS_RING_ADD_CMDID:
+		return "WMI_RX_STATUS_RING_ADD_CMD";
+	case WMI_TX_DESC_RING_ADD_CMDID:
+		return "WMI_TX_DESC_RING_ADD_CMD";
+	case WMI_RX_DESC_RING_ADD_CMDID:
+		return "WMI_RX_DESC_RING_ADD_CMD";
+	case WMI_BCAST_DESC_RING_ADD_CMDID:
+		return "WMI_BCAST_DESC_RING_ADD_CMD";
+	case WMI_CFG_DEF_RX_OFFLOAD_CMDID:
+		return "WMI_CFG_DEF_RX_OFFLOAD_CMD";
 	default:
 		return "Untracked CMD";
 	}
@@ -504,8 +516,8 @@ static const char *eventid2name(u16 eventid)
 		return "WMI_RCP_ADDBA_REQ_EVENT";
 	case WMI_DELBA_EVENTID:
 		return "WMI_DELBA_EVENT";
-	case WMI_VRING_EN_EVENTID:
-		return "WMI_VRING_EN_EVENT";
+	case WMI_RING_EN_EVENTID:
+		return "WMI_RING_EN_EVENT";
 	case WMI_DATA_PORT_OPEN_EVENTID:
 		return "WMI_DATA_PORT_OPEN_EVENT";
 	case WMI_AOA_MEAS_EVENTID:
@@ -574,6 +586,16 @@ static const char *eventid2name(u16 eventid)
 		return "WMI_STOP_SCHED_SCAN_EVENT";
 	case WMI_SCHED_SCAN_RESULT_EVENTID:
 		return "WMI_SCHED_SCAN_RESULT_EVENT";
+	case WMI_TX_STATUS_RING_CFG_DONE_EVENTID:
+		return "WMI_TX_STATUS_RING_CFG_DONE_EVENT";
+	case WMI_RX_STATUS_RING_CFG_DONE_EVENTID:
+		return "WMI_RX_STATUS_RING_CFG_DONE_EVENT";
+	case WMI_TX_DESC_RING_CFG_DONE_EVENTID:
+		return "WMI_TX_DESC_RING_CFG_DONE_EVENT";
+	case WMI_RX_DESC_RING_CFG_DONE_EVENTID:
+		return "WMI_RX_DESC_RING_CFG_DONE_EVENT";
+	case WMI_CFG_DEF_RX_OFFLOAD_DONE_EVENTID:
+		return "WMI_CFG_DEF_RX_OFFLOAD_DONE_EVENT";
 	default:
 		return "Untracked EVENT";
 	}
@@ -961,7 +983,7 @@ static void wmi_evt_connect(struct wil6210_vif *vif, int id, void *d, int len)
 	wil->sta[evt->cid].mid = vif->mid;
 	wil->sta[evt->cid].status = wil_sta_conn_pending;
 
-	rc = wil_tx_init(vif, evt->cid);
+	rc = wil_ring_init_tx(vif, evt->cid);
 	if (rc) {
 		wil_err(wil, "config tx vring failed for CID %d, rc (%d)\n",
 			evt->cid, rc);
@@ -1118,11 +1140,11 @@ static void wmi_evt_eapol_rx(struct wil6210_vif *vif, int id, void *d, int len)
 	}
 }
 
-static void wmi_evt_vring_en(struct wil6210_vif *vif, int id, void *d, int len)
+static void wmi_evt_ring_en(struct wil6210_vif *vif, int id, void *d, int len)
 {
 	struct wil6210_priv *wil = vif_to_wil(vif);
-	struct wmi_vring_en_event *evt = d;
-	u8 vri = evt->vring_index;
+	struct wmi_ring_en_event *evt = d;
+	u8 vri = evt->ring_index;
 	struct wireless_dev *wdev = vif_to_wdev(vif);
 
 	wil_dbg_wmi(wil, "Enable vring %d MID %d\n", vri, vif->mid);
@@ -1332,7 +1354,7 @@ static const struct {
 	{WMI_BA_STATUS_EVENTID,		wmi_evt_ba_status},
 	{WMI_RCP_ADDBA_REQ_EVENTID,	wmi_evt_addba_rx_req},
 	{WMI_DELBA_EVENTID,		wmi_evt_delba},
-	{WMI_VRING_EN_EVENTID,		wmi_evt_vring_en},
+	{WMI_RING_EN_EVENTID,		wmi_evt_ring_en},
 	{WMI_DATA_PORT_OPEN_EVENTID,		wmi_evt_ignore},
 	{WMI_SCHED_SCAN_RESULT_EVENTID,		wmi_evt_sched_scan_result},
 };
@@ -2118,8 +2140,8 @@ int wmi_disconnect_sta(struct wil6210_vif *vif, const u8 *mac,
 int wmi_addba(struct wil6210_priv *wil, u8 mid,
 	      u8 ringid, u8 size, u16 timeout)
 {
-	struct wmi_vring_ba_en_cmd cmd = {
-		.ringid = ringid,
+	struct wmi_ring_ba_en_cmd cmd = {
+		.ring_id = ringid,
 		.agg_max_wsize = size,
 		.ba_timeout = cpu_to_le16(timeout),
 		.amsdu = 0,
@@ -2128,19 +2150,19 @@ int wmi_addba(struct wil6210_priv *wil, u8 mid,
 	wil_dbg_wmi(wil, "addba: (ring %d size %d timeout %d)\n", ringid, size,
 		    timeout);
 
-	return wmi_send(wil, WMI_VRING_BA_EN_CMDID, mid, &cmd, sizeof(cmd));
+	return wmi_send(wil, WMI_RING_BA_EN_CMDID, mid, &cmd, sizeof(cmd));
 }
 
 int wmi_delba_tx(struct wil6210_priv *wil, u8 mid, u8 ringid, u16 reason)
 {
-	struct wmi_vring_ba_dis_cmd cmd = {
-		.ringid = ringid,
+	struct wmi_ring_ba_dis_cmd cmd = {
+		.ring_id = ringid,
 		.reason = cpu_to_le16(reason),
 	};
 
 	wil_dbg_wmi(wil, "delba_tx: (ring %d reason %d)\n", ringid, reason);
 
-	return wmi_send(wil, WMI_VRING_BA_DIS_CMDID, mid, &cmd, sizeof(cmd));
+	return wmi_send(wil, WMI_RING_BA_DIS_CMDID, mid, &cmd, sizeof(cmd));
 }
 
 int wmi_delba_rx(struct wil6210_priv *wil, u8 mid, u8 cidxtid, u16 reason)
@@ -2907,3 +2929,263 @@ int wmi_mgmt_tx(struct wil6210_vif *vif, const u8 *buf, size_t len)
 
 	return rc;
 }
+
+int wil_wmi_tx_sring_cfg(struct wil6210_priv *wil, int ring_id)
+{
+	int rc;
+	struct wil6210_vif *vif = ndev_to_vif(wil->main_ndev);
+	struct wil_status_ring *sring = &wil->srings[ring_id];
+	struct wmi_tx_status_ring_add_cmd cmd = {
+		.ring_cfg = {
+			.ring_size = cpu_to_le16(sring->size),
+		},
+		.irq_index = WIL_TX_STATUS_IRQ_IDX
+	};
+	struct {
+		struct wmi_cmd_hdr hdr;
+		struct wmi_tx_status_ring_cfg_done_event evt;
+	} __packed reply = {
+		.evt = {.status = WMI_FW_STATUS_FAILURE},
+	};
+
+	cmd.ring_cfg.ring_id = ring_id;
+
+	cmd.ring_cfg.ring_mem_base = cpu_to_le64(sring->pa);
+	rc = wmi_call(wil, WMI_TX_STATUS_RING_ADD_CMDID, vif->mid, &cmd,
+		      sizeof(cmd), WMI_TX_STATUS_RING_CFG_DONE_EVENTID,
+		      &reply, sizeof(reply), WIL_WMI_CALL_GENERAL_TO_MS);
+	if (rc) {
+		wil_err(wil, "TX_STATUS_RING_ADD_CMD failed, rc %d\n", rc);
+		return rc;
+	}
+
+	if (reply.evt.status != WMI_FW_STATUS_SUCCESS) {
+		wil_err(wil, "TX_STATUS_RING_ADD_CMD failed, status %d\n",
+			reply.evt.status);
+		return -EINVAL;
+	}
+
+	sring->hwtail = le32_to_cpu(reply.evt.ring_tail_ptr);
+
+	return 0;
+}
+
+int wil_wmi_cfg_def_rx_offload(struct wil6210_priv *wil, u16 max_rx_pl_per_desc)
+{
+	struct net_device *ndev = wil->main_ndev;
+	struct wil6210_vif *vif = ndev_to_vif(ndev);
+	int rc;
+	struct wmi_cfg_def_rx_offload_cmd cmd = {
+		.max_msdu_size = cpu_to_le16(wil_mtu2macbuf(WIL_MAX_ETH_MTU)),
+		.max_rx_pl_per_desc = cpu_to_le16(max_rx_pl_per_desc),
+		.decap_trans_type = WMI_DECAP_TYPE_802_3,
+		.l2_802_3_offload_ctrl = 0,
+		.l3_l4_ctrl = 1 << L3_L4_CTRL_TCPIP_CHECKSUM_EN_POS,
+	};
+	struct {
+		struct wmi_cmd_hdr hdr;
+		struct wmi_cfg_def_rx_offload_done_event evt;
+	} __packed reply = {
+		.evt = {.status = WMI_FW_STATUS_FAILURE},
+	};
+
+	rc = wmi_call(wil, WMI_CFG_DEF_RX_OFFLOAD_CMDID, vif->mid, &cmd,
+		      sizeof(cmd), WMI_CFG_DEF_RX_OFFLOAD_DONE_EVENTID, &reply,
+		      sizeof(reply), WIL_WMI_CALL_GENERAL_TO_MS);
+	if (rc) {
+		wil_err(wil, "WMI_CFG_DEF_RX_OFFLOAD_CMD failed, rc %d\n", rc);
+		return rc;
+	}
+
+	if (reply.evt.status != WMI_FW_STATUS_SUCCESS) {
+		wil_err(wil, "WMI_CFG_DEF_RX_OFFLOAD_CMD failed, status %d\n",
+			reply.evt.status);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+int wil_wmi_rx_sring_add(struct wil6210_priv *wil, u16 ring_id)
+{
+	struct net_device *ndev = wil->main_ndev;
+	struct wil6210_vif *vif = ndev_to_vif(ndev);
+	struct wil_status_ring *sring = &wil->srings[ring_id];
+	int rc;
+	struct wmi_rx_status_ring_add_cmd cmd = {
+		.ring_cfg = {
+			.ring_size = cpu_to_le16(sring->size),
+			.ring_id = ring_id,
+		},
+		.rx_msg_type = wil->use_compressed_rx_status ?
+			WMI_RX_MSG_TYPE_COMPRESSED :
+			WMI_RX_MSG_TYPE_EXTENDED,
+		.irq_index = WIL_RX_STATUS_IRQ_IDX,
+	};
+	struct {
+		struct wmi_cmd_hdr hdr;
+		struct wmi_rx_status_ring_cfg_done_event evt;
+	} __packed reply = {
+		.evt = {.status = WMI_FW_STATUS_FAILURE},
+	};
+
+	cmd.ring_cfg.ring_mem_base = cpu_to_le64(sring->pa);
+	rc = wmi_call(wil, WMI_RX_STATUS_RING_ADD_CMDID, vif->mid, &cmd,
+		      sizeof(cmd), WMI_RX_STATUS_RING_CFG_DONE_EVENTID, &reply,
+		      sizeof(reply), WIL_WMI_CALL_GENERAL_TO_MS);
+	if (rc) {
+		wil_err(wil, "RX_STATUS_RING_ADD_CMD failed, rc %d\n", rc);
+		return rc;
+	}
+
+	if (reply.evt.status != WMI_FW_STATUS_SUCCESS) {
+		wil_err(wil, "RX_STATUS_RING_ADD_CMD failed, status %d\n",
+			reply.evt.status);
+		return -EINVAL;
+	}
+
+	sring->hwtail = le32_to_cpu(reply.evt.ring_tail_ptr);
+
+	return 0;
+}
+
+int wil_wmi_rx_desc_ring_add(struct wil6210_priv *wil, int status_ring_id)
+{
+	struct net_device *ndev = wil->main_ndev;
+	struct wil6210_vif *vif = ndev_to_vif(ndev);
+	struct wil_ring *ring = &wil->ring_rx;
+	int rc;
+	struct wmi_rx_desc_ring_add_cmd cmd = {
+		.ring_cfg = {
+			.ring_size = cpu_to_le16(ring->size),
+			.ring_id = WIL_RX_DESC_RING_ID,
+		},
+		.status_ring_id = status_ring_id,
+		.irq_index = WIL_RX_STATUS_IRQ_IDX,
+	};
+	struct {
+		struct wmi_cmd_hdr hdr;
+		struct wmi_rx_desc_ring_cfg_done_event evt;
+	} __packed reply = {
+		.evt = {.status = WMI_FW_STATUS_FAILURE},
+	};
+
+	cmd.ring_cfg.ring_mem_base = cpu_to_le64(ring->pa);
+	cmd.sw_tail_host_addr = cpu_to_le64(ring->edma_rx_swtail.pa);
+	rc = wmi_call(wil, WMI_RX_DESC_RING_ADD_CMDID, vif->mid, &cmd,
+		      sizeof(cmd), WMI_RX_DESC_RING_CFG_DONE_EVENTID, &reply,
+		      sizeof(reply), WIL_WMI_CALL_GENERAL_TO_MS);
+	if (rc) {
+		wil_err(wil, "WMI_RX_DESC_RING_ADD_CMD failed, rc %d\n", rc);
+		return rc;
+	}
+
+	if (reply.evt.status != WMI_FW_STATUS_SUCCESS) {
+		wil_err(wil, "WMI_RX_DESC_RING_ADD_CMD failed, status %d\n",
+			reply.evt.status);
+		return -EINVAL;
+	}
+
+	ring->hwtail = le32_to_cpu(reply.evt.ring_tail_ptr);
+
+	return 0;
+}
+
+int wil_wmi_tx_desc_ring_add(struct wil6210_vif *vif, int ring_id, int cid,
+			     int tid)
+{
+	struct wil6210_priv *wil = vif_to_wil(vif);
+	int sring_id = wil->tx_sring_idx; /* there is only one TX sring */
+	int rc;
+	struct wil_ring *ring = &wil->ring_tx[ring_id];
+	struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_id];
+	struct wmi_tx_desc_ring_add_cmd cmd = {
+		.ring_cfg = {
+			.ring_size = cpu_to_le16(ring->size),
+			.ring_id = ring_id,
+		},
+		.status_ring_id = sring_id,
+		.cid = cid,
+		.tid = tid,
+		.encap_trans_type = WMI_VRING_ENC_TYPE_802_3,
+		.max_msdu_size = cpu_to_le16(wil_mtu2macbuf(mtu_max)),
+		.schd_params = {
+			.priority = cpu_to_le16(0),
+			.timeslot_us = cpu_to_le16(0xfff),
+		}
+	};
+	struct {
+		struct wmi_cmd_hdr hdr;
+		struct wmi_tx_desc_ring_cfg_done_event evt;
+	} __packed reply = {
+		.evt = {.status = WMI_FW_STATUS_FAILURE},
+	};
+
+	cmd.ring_cfg.ring_mem_base = cpu_to_le64(ring->pa);
+	rc = wmi_call(wil, WMI_TX_DESC_RING_ADD_CMDID, vif->mid, &cmd,
+		      sizeof(cmd), WMI_TX_DESC_RING_CFG_DONE_EVENTID, &reply,
+		      sizeof(reply), WIL_WMI_CALL_GENERAL_TO_MS);
+	if (rc) {
+		wil_err(wil, "WMI_TX_DESC_RING_ADD_CMD failed, rc %d\n", rc);
+		return rc;
+	}
+
+	if (reply.evt.status != WMI_FW_STATUS_SUCCESS) {
+		wil_err(wil, "WMI_TX_DESC_RING_ADD_CMD failed, status %d\n",
+			reply.evt.status);
+		return -EINVAL;
+	}
+
+	spin_lock_bh(&txdata->lock);
+	ring->hwtail = le32_to_cpu(reply.evt.ring_tail_ptr);
+	txdata->mid = vif->mid;
+	txdata->enabled = 1;
+	spin_unlock_bh(&txdata->lock);
+
+	return 0;
+}
+
+int wil_wmi_bcast_desc_ring_add(struct wil6210_vif *vif, int ring_id)
+{
+	struct wil6210_priv *wil = vif_to_wil(vif);
+	struct wil_ring *ring = &wil->ring_tx[ring_id];
+	int rc;
+	struct wmi_bcast_desc_ring_add_cmd cmd = {
+		.ring_cfg = {
+			.ring_size = cpu_to_le16(ring->size),
+			.ring_id = ring_id,
+		},
+		.status_ring_id = wil->tx_sring_idx,
+		.encap_trans_type = WMI_VRING_ENC_TYPE_802_3,
+	};
+	struct {
+		struct wmi_cmd_hdr hdr;
+		struct wmi_rx_desc_ring_cfg_done_event evt;
+	} __packed reply = {
+		.evt = {.status = WMI_FW_STATUS_FAILURE},
+	};
+	struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_id];
+
+	cmd.ring_cfg.ring_mem_base = cpu_to_le64(ring->pa);
+	rc = wmi_call(wil, WMI_BCAST_DESC_RING_ADD_CMDID, vif->mid, &cmd,
+		      sizeof(cmd), WMI_TX_DESC_RING_CFG_DONE_EVENTID, &reply,
+		      sizeof(reply), WIL_WMI_CALL_GENERAL_TO_MS);
+	if (rc) {
+		wil_err(wil, "WMI_BCAST_DESC_RING_ADD_CMD failed, rc %d\n", rc);
+		return rc;
+	}
+
+	if (reply.evt.status != WMI_FW_STATUS_SUCCESS) {
+		wil_err(wil, "Broadcast Tx config failed, status %d\n",
+			reply.evt.status);
+		return -EINVAL;
+	}
+
+	spin_lock_bh(&txdata->lock);
+	ring->hwtail = le32_to_cpu(reply.evt.ring_tail_ptr);
+	txdata->mid = vif->mid;
+	txdata->enabled = 1;
+	spin_unlock_bh(&txdata->lock);
+
+	return 0;
+}