wil6210: add support for enhanced DMA RX data flows

Enhanced DMA RX data path is handled using a single
RX descriptor ring for all VIFs.
Multiple RX status rings are supported, to allow RSS
and multi MSI support.
The driver gets the RX completions via the RX status rings.
The RX status message includes the completed RX buffer ID,
which points to the allocated SKB.

The enhanced DMA RX data flow supports RX chaining, where
multiple SKBs are merged into a single packet.

Enhanced DMA HW supports RX HW reorder offload, enabled by
default for Talyn-MB.

amsdu_en debugfs entry was added to allow control MSDU aggregation.
Use the following command to disable AMSDU (enabled by default):
echo 0 > amsdu_en

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, 56 insertions, 3 deletions

diff --git a/drivers/net/wireless/ath/wil6210/wmi.c b/drivers/net/wireless/ath/wil6210/wmi.c
index b2e966df57f5..0370b7e8dbb1 100644
--- a/drivers/net/wireless/ath/wil6210/wmi.c
+++ b/drivers/net/wireless/ath/wil6210/wmi.c
@@ -428,6 +428,8 @@ static const char *cmdid2name(u16 cmdid)
 		return "WMI_RCP_DELBA_CMD";
 	case WMI_RCP_ADDBA_RESP_CMDID:
 		return "WMI_RCP_ADDBA_RESP_CMD";
+	case WMI_RCP_ADDBA_RESP_EDMA_CMDID:
+		return "WMI_RCP_ADDBA_RESP_EDMA_CMD";
 	case WMI_PS_DEV_PROFILE_CFG_CMDID:
 		return "WMI_PS_DEV_PROFILE_CFG_CMD";
 	case WMI_SET_MGMT_RETRY_LIMIT_CMDID:
@@ -2140,15 +2142,18 @@ 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)
 {
+	u8 amsdu = wil->use_enhanced_dma_hw && wil->use_rx_hw_reordering &&
+		test_bit(WMI_FW_CAPABILITY_AMSDU, wil->fw_capabilities) &&
+		wil->amsdu_en;
 	struct wmi_ring_ba_en_cmd cmd = {
 		.ring_id = ringid,
 		.agg_max_wsize = size,
 		.ba_timeout = cpu_to_le16(timeout),
-		.amsdu = 0,
+		.amsdu = amsdu,
 	};
 
-	wil_dbg_wmi(wil, "addba: (ring %d size %d timeout %d)\n", ringid, size,
-		    timeout);
+	wil_dbg_wmi(wil, "addba: (ring %d size %d timeout %d amsdu %d)\n",
+		    ringid, size, timeout, amsdu);
 
 	return wmi_send(wil, WMI_RING_BA_EN_CMDID, mid, &cmd, sizeof(cmd));
 }
@@ -2223,6 +2228,54 @@ int wmi_addba_rx_resp(struct wil6210_priv *wil,
 	return rc;
 }
 
+int wmi_addba_rx_resp_edma(struct wil6210_priv *wil, u8 mid, u8 cid, u8 tid,
+			   u8 token, u16 status, bool amsdu, u16 agg_wsize,
+			   u16 timeout)
+{
+	int rc;
+	struct wmi_rcp_addba_resp_edma_cmd cmd = {
+		.cid = cid,
+		.tid = tid,
+		.dialog_token = token,
+		.status_code = cpu_to_le16(status),
+		/* bit 0: A-MSDU supported
+		 * bit 1: policy (should be 0 for us)
+		 * bits 2..5: TID
+		 * bits 6..15: buffer size
+		 */
+		.ba_param_set = cpu_to_le16((amsdu ? 1 : 0) | (tid << 2) |
+					    (agg_wsize << 6)),
+		.ba_timeout = cpu_to_le16(timeout),
+		/* route all the connections to status ring 0 */
+		.status_ring_id = WIL_DEFAULT_RX_STATUS_RING_ID,
+	};
+	struct {
+		struct wmi_cmd_hdr wmi;
+		struct wmi_rcp_addba_resp_sent_event evt;
+	} __packed reply = {
+		.evt = {.status = cpu_to_le16(WMI_FW_STATUS_FAILURE)},
+	};
+
+	wil_dbg_wmi(wil,
+		    "ADDBA response for CID %d TID %d size %d timeout %d status %d AMSDU%s, sring_id %d\n",
+		    cid, tid, agg_wsize, timeout, status, amsdu ? "+" : "-",
+		    WIL_DEFAULT_RX_STATUS_RING_ID);
+
+	rc = wmi_call(wil, WMI_RCP_ADDBA_RESP_EDMA_CMDID, mid, &cmd,
+		      sizeof(cmd), WMI_RCP_ADDBA_RESP_SENT_EVENTID, &reply,
+		      sizeof(reply), WIL_WMI_CALL_GENERAL_TO_MS);
+	if (rc)
+		return rc;
+
+	if (reply.evt.status) {
+		wil_err(wil, "ADDBA response failed with status %d\n",
+			le16_to_cpu(reply.evt.status));
+		rc = -EINVAL;
+	}
+
+	return rc;
+}
+
 int wmi_ps_dev_profile_cfg(struct wil6210_priv *wil,
 			   enum wmi_ps_profile_type ps_profile)
 {