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>

drivers/net/wireless/ath/wil6210/Makefile

@@ -9,6 +9,7 @@ wil6210-$(CONFIG_WIL6210_DEBUGFS) += debugfs.o
 wil6210-y += wmi.o
 wil6210-y += interrupt.o
 wil6210-y += txrx.o
+wil6210-y += txrx_edma.o
 wil6210-y += debug.o
 wil6210-y += rx_reorder.o
 wil6210-y += fw.o

drivers/net/wireless/ath/wil6210/debugfs.c

@@ -1761,6 +1761,60 @@ static const struct file_operations fops_suspend_stats = {
 	.open  = simple_open,
 };
 
+/*---------compressed_rx_status---------*/
+static ssize_t wil_compressed_rx_status_write(struct file *file,
+					      const char __user *buf,
+					      size_t len, loff_t *ppos)
+{
+	struct seq_file *s = file->private_data;
+	struct wil6210_priv *wil = s->private;
+	int compressed_rx_status;
+	int rc;
+
+	rc = kstrtoint_from_user(buf, len, 0, &compressed_rx_status);
+	if (rc) {
+		wil_err(wil, "Invalid argument\n");
+		return rc;
+	}
+
+	if (wil_has_active_ifaces(wil, true, false)) {
+		wil_err(wil, "cannot change edma config after iface is up\n");
+		return -EPERM;
+	}
+
+	wil_info(wil, "%sable compressed_rx_status\n",
+		 compressed_rx_status ? "En" : "Dis");
+
+	wil->use_compressed_rx_status = compressed_rx_status;
+
+	return len;
+}
+
+static int
+wil_compressed_rx_status_show(struct seq_file *s, void *data)
+{
+	struct wil6210_priv *wil = s->private;
+
+	seq_printf(s, "%d\n", wil->use_compressed_rx_status);
+
+	return 0;
+}
+
+static int
+wil_compressed_rx_status_seq_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, wil_compressed_rx_status_show,
+			   inode->i_private);
+}
+
+static const struct file_operations fops_compressed_rx_status = {
+	.open  = wil_compressed_rx_status_seq_open,
+	.release = single_release,
+	.read = seq_read,
+	.write = wil_compressed_rx_status_write,
+	.llseek	= seq_lseek,
+};
+
 /*----------------*/
 static void wil6210_debugfs_init_blobs(struct wil6210_priv *wil,
 				       struct dentry *dbg)
@@ -1814,6 +1868,7 @@ static const struct {
 	{"fw_capabilities",	0444,	&fops_fw_capabilities},
 	{"fw_version",	0444,		&fops_fw_version},
 	{"suspend_stats",	0644,	&fops_suspend_stats},
+	{"compressed_rx_status", 0644,	&fops_compressed_rx_status},
 };
 
 static void wil6210_debugfs_init_files(struct wil6210_priv *wil,
@@ -1860,6 +1915,10 @@ static const struct dbg_off dbg_wil_off[] = {
 	WIL_FIELD(abft_len, 0644,		doff_u8),
 	WIL_FIELD(wakeup_trigger, 0644,		doff_u8),
 	WIL_FIELD(ring_idle_trsh, 0644,	doff_u32),
+	WIL_FIELD(num_rx_status_rings, 0644,	doff_u8),
+	WIL_FIELD(rx_status_ring_order, 0644,	doff_u32),
+	WIL_FIELD(tx_status_ring_order, 0644,	doff_u32),
+	WIL_FIELD(rx_buff_id_count, 0644,	doff_u32),
 	{},
 };
 

drivers/net/wireless/ath/wil6210/ethtool.c

@@ -101,7 +101,7 @@ static int wil_ethtoolops_set_coalesce(struct net_device *ndev,
 	if (ret < 0)
 		return ret;
 
-	wil_configure_interrupt_moderation(wil);
+	wil->txrx_ops.configure_interrupt_moderation(wil);
 
 	wil_pm_runtime_put(wil);
 

drivers/net/wireless/ath/wil6210/interrupt.c

@@ -186,6 +186,27 @@ void wil_unmask_irq(struct wil6210_priv *wil)
 	wil6210_unmask_irq_misc(wil, true);
 }
 
+void wil_configure_interrupt_moderation_edma(struct wil6210_priv *wil)
+{
+	u32 moderation;
+
+	wil_s(wil, RGF_INT_GEN_IDLE_TIME_LIMIT, WIL_EDMA_IDLE_TIME_LIMIT_USEC);
+
+	wil_s(wil, RGF_INT_GEN_TIME_UNIT_LIMIT, WIL_EDMA_TIME_UNIT_CLK_CYCLES);
+
+	/* Update RX and TX moderation */
+	moderation = wil->rx_max_burst_duration |
+		(WIL_EDMA_AGG_WATERMARK << WIL_EDMA_AGG_WATERMARK_POS);
+	wil_w(wil, RGF_INT_CTRL_INT_GEN_CFG_0, moderation);
+	wil_w(wil, RGF_INT_CTRL_INT_GEN_CFG_1, moderation);
+
+	/* Treat special events as regular
+	 * (set bit 0 to 0x1 and clear bits 1-8)
+	 */
+	wil_c(wil, RGF_INT_COUNT_ON_SPECIAL_EVT, 0x1FE);
+	wil_s(wil, RGF_INT_COUNT_ON_SPECIAL_EVT, 0x1);
+}
+
 void wil_configure_interrupt_moderation(struct wil6210_priv *wil)
 {
 	struct wireless_dev *wdev = wil->main_ndev->ieee80211_ptr;

drivers/net/wireless/ath/wil6210/main.c

@@ -21,11 +21,13 @@
 
 #include "wil6210.h"
 #include "txrx.h"
+#include "txrx_edma.h"
 #include "wmi.h"
 #include "boot_loader.h"
 
 #define WAIT_FOR_HALP_VOTE_MS 100
 #define WAIT_FOR_SCAN_ABORT_MS 1000
+#define WIL_DEFAULT_NUM_RX_STATUS_RINGS 1
 
 bool debug_fw; /* = false; */
 module_param(debug_fw, bool, 0444);
@@ -160,6 +162,37 @@ void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
 	}
 }
 
+static void wil_ring_fini_tx(struct wil6210_priv *wil, int id)
+{
+	struct wil_ring *ring = &wil->ring_tx[id];
+	struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id];
+
+	lockdep_assert_held(&wil->mutex);
+
+	if (!ring->va)
+		return;
+
+	wil_dbg_misc(wil, "vring_fini_tx: id=%d\n", id);
+
+	spin_lock_bh(&txdata->lock);
+	txdata->dot1x_open = false;
+	txdata->mid = U8_MAX;
+	txdata->enabled = 0; /* no Tx can be in progress or start anew */
+	spin_unlock_bh(&txdata->lock);
+	/* napi_synchronize waits for completion of the current NAPI but will
+	 * not prevent the next NAPI run.
+	 * Add a memory barrier to guarantee that txdata->enabled is zeroed
+	 * before napi_synchronize so that the next scheduled NAPI will not
+	 * handle this vring
+	 */
+	wmb();
+	/* make sure NAPI won't touch this vring */
+	if (test_bit(wil_status_napi_en, wil->status))
+		napi_synchronize(&wil->napi_tx);
+
+	wil->txrx_ops.ring_fini_tx(wil, ring);
+}
+
 static void wil_disconnect_cid(struct wil6210_vif *vif, int cid,
 			       u16 reason_code, bool from_event)
 __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
@@ -456,15 +489,16 @@ static void wil_fw_error_worker(struct work_struct *work)
 static int wil_find_free_ring(struct wil6210_priv *wil)
 {
 	int i;
+	int min_ring_id = wil_get_min_tx_ring_id(wil);
 
-	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
+	for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) {
 		if (!wil->ring_tx[i].va)
 			return i;
 	}
 	return -EINVAL;
 }
 
-int wil_tx_init(struct wil6210_vif *vif, int cid)
+int wil_ring_init_tx(struct wil6210_vif *vif, int cid)
 {
 	struct wil6210_priv *wil = vif_to_wil(vif);
 	int rc = -EINVAL, ringid;
@@ -482,7 +516,8 @@ int wil_tx_init(struct wil6210_vif *vif, int cid)
 	wil_dbg_wmi(wil, "Configure for connection CID %d MID %d ring %d\n",
 		    cid, vif->mid, ringid);
 
-	rc = wil_vring_init_tx(vif, ringid, 1 << tx_ring_order, cid, 0);
+	rc = wil->txrx_ops.ring_init_tx(vif, ringid, 1 << tx_ring_order,
+					cid, 0);
 	if (rc)
 		wil_err(wil, "init TX for CID %d MID %d vring %d failed\n",
 			cid, vif->mid, ringid);
@@ -504,7 +539,7 @@ int wil_bcast_init(struct wil6210_vif *vif)
 		return ri;
 
 	vif->bcast_ring = ri;
-	rc = wil_vring_init_bcast(vif, ri, 1 << bcast_ring_order);
+	rc = wil->txrx_ops.ring_init_bcast(vif, ri, 1 << bcast_ring_order);
 	if (rc)
 		vif->bcast_ring = -1;
 
@@ -594,6 +629,22 @@ int wil_priv_init(struct wil6210_priv *wil)
 	wil->reply_mid = U8_MAX;
 	wil->max_vifs = 1;
 
+	/* edma configuration can be updated via debugfs before allocation */
+	wil->num_rx_status_rings = WIL_DEFAULT_NUM_RX_STATUS_RINGS;
+	wil->use_compressed_rx_status = true;
+	wil->tx_status_ring_order = WIL_TX_SRING_SIZE_ORDER_DEFAULT;
+
+	/* Rx status ring size should be bigger than the number of RX buffers
+	 * in order to prevent backpressure on the status ring, which may
+	 * cause HW freeze.
+	 */
+	wil->rx_status_ring_order = WIL_RX_SRING_SIZE_ORDER_DEFAULT;
+	/* Number of RX buffer IDs should be bigger than the RX descriptor
+	 * ring size as in HW reorder flow, the HW can consume additional
+	 * buffers before releasing the previous ones.
+	 */
+	wil->rx_buff_id_count = WIL_RX_BUFF_ARR_SIZE_DEFAULT;
+
 	return 0;
 
 out_wmi_wq:
@@ -1312,7 +1363,8 @@ int wil_reset(struct wil6210_priv *wil, bool load_fw)
 	rc = wil_target_reset(wil, no_flash);
 	wil6210_clear_irq(wil);
 	wil_enable_irq(wil);
-	wil_rx_fini(wil);
+	wil->txrx_ops.rx_fini(wil);
+	wil->txrx_ops.tx_fini(wil);
 	if (rc) {
 		if (!no_flash)
 			wil_bl_crash_info(wil, true);
@@ -1365,7 +1417,6 @@ int wil_reset(struct wil6210_priv *wil, bool load_fw)
 	clear_bit(wil_status_resetting, wil->status);
 
 	if (load_fw) {
-		wil_configure_interrupt_moderation(wil);
 		wil_unmask_irq(wil);
 
 		/* we just started MAC, wait for FW ready */
@@ -1380,6 +1431,8 @@ int wil_reset(struct wil6210_priv *wil, bool load_fw)
 			return rc;
 		}
 
+		wil->txrx_ops.configure_interrupt_moderation(wil);
+
 		rc = wil_restore_vifs(wil);
 		if (rc) {
 			wil_err(wil, "failed to restore vifs, rc %d\n", rc);
@@ -1434,8 +1487,12 @@ int __wil_up(struct wil6210_priv *wil)
 	if (rc)
 		return rc;
 
-	/* Rx VRING. After MAC and beacon */
-	rc = wil_rx_init(wil, 1 << rx_ring_order);
+	/* Rx RING. After MAC and beacon */
+	rc = wil->txrx_ops.rx_init(wil, 1 << rx_ring_order);
+	if (rc)
+		return rc;
+
+	rc = wil->txrx_ops.tx_init(wil);
 	if (rc)
 		return rc;
 
@@ -1596,3 +1653,11 @@ void wil_halp_unvote(struct wil6210_priv *wil)
 
 	mutex_unlock(&wil->halp.lock);
 }
+
+void wil_init_txrx_ops(struct wil6210_priv *wil)
+{
+	if (wil->use_enhanced_dma_hw)
+		wil_init_txrx_ops_edma(wil);
+	else
+		wil_init_txrx_ops_legacy_dma(wil);
+}

drivers/net/wireless/ath/wil6210/pcie_bus.c

@@ -102,6 +102,7 @@ int wil_set_capabilities(struct wil6210_priv *wil)
 		wil->rgf_fw_assert_code_addr = TALYN_RGF_FW_ASSERT_CODE;
 		wil->rgf_ucode_assert_code_addr = TALYN_RGF_UCODE_ASSERT_CODE;
 		set_bit(hw_capa_no_flash, wil->hw_capa);
+		wil->use_enhanced_dma_hw = true;
 		break;
 	default:
 		wil_err(wil, "Unknown board hardware, chip_id 0x%08x, chip_revision 0x%08x\n",
@@ -111,6 +112,8 @@ int wil_set_capabilities(struct wil6210_priv *wil)
 		return -EINVAL;
 	}
 
+	wil_init_txrx_ops(wil);
+
 	iccm_section = wil_find_fw_mapping("fw_code");
 	if (!iccm_section) {
 		wil_err(wil, "fw_code section not found in fw_mapping\n");
@@ -266,8 +269,8 @@ static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		.fw_recovery = wil_platform_rop_fw_recovery,
 	};
 	u32 bar_size = pci_resource_len(pdev, 0);
-	int dma_addr_size[] = {48, 40, 32}; /* keep descending order */
-	int i;
+	int dma_addr_size[] = {64, 48, 40, 32}; /* keep descending order */
+	int i, start_idx;
 
 	/* check HW */
 	dev_info(&pdev->dev, WIL_NAME
@@ -302,24 +305,6 @@ static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		goto if_free;
 	}
 	/* rollback to err_plat */
-
-	/* device supports >32bit addresses */
-	for (i = 0; i < ARRAY_SIZE(dma_addr_size); i++) {
-		rc = dma_set_mask_and_coherent(dev,
-					       DMA_BIT_MASK(dma_addr_size[i]));
-		if (rc) {
-			dev_err(dev, "dma_set_mask_and_coherent(%d) failed: %d\n",
-				dma_addr_size[i], rc);
-			continue;
-		}
-		dev_info(dev, "using dma mask %d", dma_addr_size[i]);
-		wil->dma_addr_size = dma_addr_size[i];
-		break;
-	}
-
-	if (wil->dma_addr_size == 0)
-		goto err_plat;
-
 	rc = pci_enable_device(pdev);
 	if (rc && pdev->msi_enabled == 0) {
 		wil_err(wil,
@@ -359,6 +344,28 @@ static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		wil_err(wil, "wil_set_capabilities failed, rc %d\n", rc);
 		goto err_iounmap;
 	}
+
+	/* device supports >32bit addresses.
+	 * for legacy DMA start from 48 bit.
+	 */
+	start_idx = wil->use_enhanced_dma_hw ? 0 : 1;
+
+	for (i = start_idx; i < ARRAY_SIZE(dma_addr_size); i++) {
+		rc = dma_set_mask_and_coherent(dev,
+					       DMA_BIT_MASK(dma_addr_size[i]));
+		if (rc) {
+			dev_err(dev, "dma_set_mask_and_coherent(%d) failed: %d\n",
+				dma_addr_size[i], rc);
+			continue;
+		}
+		dev_info(dev, "using dma mask %d", dma_addr_size[i]);
+		wil->dma_addr_size = dma_addr_size[i];
+		break;
+	}
+
+	if (wil->dma_addr_size == 0)
+		goto err_iounmap;
+
 	wil6210_clear_irq(wil);
 
 	/* FW should raise IRQ when ready */

drivers/net/wireless/ath/wil6210/txrx.c

@@ -202,14 +202,13 @@ static void wil_txdesc_unmap(struct device *dev, struct vring_tx_desc *d,
 	}
 }
 
-static void wil_vring_free(struct wil6210_priv *wil, struct wil_ring *vring,
-			   int tx)
+static void wil_vring_free(struct wil6210_priv *wil, struct wil_ring *vring)
 {
 	struct device *dev = wil_to_dev(wil);
 	size_t sz = vring->size * sizeof(vring->va[0]);
 
 	lockdep_assert_held(&wil->mutex);
-	if (tx) {
+	if (!vring->is_rx) {
 		int vring_index = vring - wil->ring_tx;
 
 		wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n",
@@ -226,7 +225,7 @@ static void wil_vring_free(struct wil6210_priv *wil, struct wil_ring *vring,
 		u16 dmalen;
 		struct wil_ctx *ctx;
 
-		if (tx) {
+		if (!vring->is_rx) {
 			struct vring_tx_desc dd, *d = ⅆ
 			volatile struct vring_tx_desc *_d =
 					&vring->va[vring->swtail].tx.legacy;
@@ -843,7 +842,7 @@ static void wil_rx_buf_len_init(struct wil6210_priv *wil)
 	}
 }
 
-int wil_rx_init(struct wil6210_priv *wil, u16 size)
+static int wil_rx_init(struct wil6210_priv *wil, u16 size)
 {
 	struct wil_ring *vring = &wil->ring_rx;
 	int rc;
@@ -858,6 +857,7 @@ int wil_rx_init(struct wil6210_priv *wil, u16 size)
 	wil_rx_buf_len_init(wil);
 
 	vring->size = size;
+	vring->is_rx = true;
 	rc = wil_vring_alloc(wil, vring);
 	if (rc)
 		return rc;
@@ -872,22 +872,22 @@ int wil_rx_init(struct wil6210_priv *wil, u16 size)
 
 	return 0;
  err_free:
-	wil_vring_free(wil, vring, 0);
+	wil_vring_free(wil, vring);
 
 	return rc;
 }
 
-void wil_rx_fini(struct wil6210_priv *wil)
+static void wil_rx_fini(struct wil6210_priv *wil)
 {
 	struct wil_ring *vring = &wil->ring_rx;
 
 	wil_dbg_misc(wil, "rx_fini\n");
 
 	if (vring->va)
-		wil_vring_free(wil, vring, 0);
+		wil_vring_free(wil, vring);
 }
 
-static inline void wil_tx_data_init(struct wil_ring_tx_data *txdata)
+void wil_tx_data_init(struct wil_ring_tx_data *txdata)
 {
 	spin_lock_bh(&txdata->lock);
 	txdata->dot1x_open = 0;
@@ -903,7 +903,7 @@ static inline void wil_tx_data_init(struct wil_ring_tx_data *txdata)
 	spin_unlock_bh(&txdata->lock);
 }
 
-int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size,
+static int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size,
 			     int cid, int tid)
 {
 	struct wil6210_priv *wil = vif_to_wil(vif);
@@ -948,6 +948,7 @@ int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size,
 	}
 
 	wil_tx_data_init(txdata);
+	vring->is_rx = false;
 	vring->size = size;
 	rc = wil_vring_alloc(wil, vring);
 	if (rc)
@@ -987,7 +988,7 @@ int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size,
 	txdata->dot1x_open = false;
 	txdata->enabled = 0;
 	spin_unlock_bh(&txdata->lock);
-	wil_vring_free(wil, vring, 1);
+	wil_vring_free(wil, vring);
 	wil->ring2cid_tid[id][0] = WIL6210_MAX_CID;
 	wil->ring2cid_tid[id][1] = 0;
 
@@ -1032,6 +1033,7 @@ int wil_vring_init_bcast(struct wil6210_vif *vif, int id, int size)
 	}
 
 	wil_tx_data_init(txdata);
+	vring->is_rx = false;
 	vring->size = size;
 	rc = wil_vring_alloc(wil, vring);
 	if (rc)
@@ -1069,43 +1071,12 @@ int wil_vring_init_bcast(struct wil6210_vif *vif, int id, int size)
 	txdata->enabled = 0;
 	txdata->dot1x_open = false;
 	spin_unlock_bh(&txdata->lock);
-	wil_vring_free(wil, vring, 1);
+	wil_vring_free(wil, vring);
  out:
 
 	return rc;
 }
 
-void wil_ring_fini_tx(struct wil6210_priv *wil, int id)
-{
-	struct wil_ring *vring = &wil->ring_tx[id];
-	struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id];
-
-	lockdep_assert_held(&wil->mutex);
-
-	if (!vring->va)
-		return;
-
-	wil_dbg_misc(wil, "vring_fini_tx: id=%d\n", id);
-
-	spin_lock_bh(&txdata->lock);
-	txdata->dot1x_open = false;
-	txdata->mid = U8_MAX;
-	txdata->enabled = 0; /* no Tx can be in progress or start anew */
-	spin_unlock_bh(&txdata->lock);
-	/* napi_synchronize waits for completion of the current NAPI but will
-	 * not prevent the next NAPI run.
-	 * Add a memory barrier to guarantee that txdata->enabled is zeroed
-	 * before napi_synchronize so that the next scheduled NAPI will not
-	 * handle this vring
-	 */
-	wmb();
-	/* make sure NAPI won't touch this vring */
-	if (test_bit(wil_status_napi_en, wil->status))
-		napi_synchronize(&wil->napi_tx);
-
-	wil_vring_free(wil, vring, 1);
-}
-
 static struct wil_ring *wil_find_tx_ucast(struct wil6210_priv *wil,
 					  struct wil6210_vif *vif,
 					  struct sk_buff *skb)
@@ -1113,12 +1084,13 @@ static struct wil_ring *wil_find_tx_ucast(struct wil6210_priv *wil,
 	int i;
 	struct ethhdr *eth = (void *)skb->data;
 	int cid = wil_find_cid(wil, vif->mid, eth->h_dest);
+	int min_ring_id = wil_get_min_tx_ring_id(wil);
 
 	if (cid < 0)
 		return NULL;
 
 	/* TODO: fix for multiple TID */
-	for (i = 0; i < ARRAY_SIZE(wil->ring2cid_tid); i++) {
+	for (i = min_ring_id; i < ARRAY_SIZE(wil->ring2cid_tid); i++) {
 		if (!wil->ring_tx_data[i].dot1x_open &&
 		    skb->protocol != cpu_to_be16(ETH_P_PAE))
 			continue;
@@ -1153,12 +1125,13 @@ static struct wil_ring *wil_find_tx_ring_sta(struct wil6210_priv *wil,
 	int i;
 	u8 cid;
 	struct wil_ring_tx_data  *txdata;
+	int min_ring_id = wil_get_min_tx_ring_id(wil);
 
 	/* In the STA mode, it is expected to have only 1 VRING
 	 * for the AP we connected to.
 	 * find 1-st vring eligible for this skb and use it.
 	 */
-	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
+	for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) {
 		ring = &wil->ring_tx[i];
 		txdata = &wil->ring_tx_data[i];
 		if (!ring->va || !txdata->enabled || txdata->mid != vif->mid)
@@ -1234,9 +1207,10 @@ static struct wil_ring *wil_find_tx_bcast_2(struct wil6210_priv *wil,
 	struct ethhdr *eth = (void *)skb->data;
 	char *src = eth->h_source;
 	struct wil_ring_tx_data *txdata, *txdata2;
+	int min_ring_id = wil_get_min_tx_ring_id(wil);
 
 	/* find 1-st vring eligible for data */
-	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
+	for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) {
 		v = &wil->ring_tx[i];
 		txdata = &wil->ring_tx_data[i];
 		if (!v->va || !txdata->enabled || txdata->mid != vif->mid)
@@ -2201,3 +2175,25 @@ int wil_tx_complete(struct wil6210_vif *vif, int ringid)
 
 	return done;
 }
+
+static inline int wil_tx_init(struct wil6210_priv *wil)
+{
+	return 0;
+}
+
+static inline void wil_tx_fini(struct wil6210_priv *wil) {}
+
+void wil_init_txrx_ops_legacy_dma(struct wil6210_priv *wil)
+{
+	wil->txrx_ops.configure_interrupt_moderation =
+		wil_configure_interrupt_moderation;
+	/* TX ops */
+	wil->txrx_ops.ring_init_tx = wil_vring_init_tx;
+	wil->txrx_ops.ring_fini_tx = wil_vring_free;
+	wil->txrx_ops.ring_init_bcast = wil_vring_init_bcast;
+	wil->txrx_ops.tx_init = wil_tx_init;
+	wil->txrx_ops.tx_fini = wil_tx_fini;
+	/* RX ops */
+	wil->txrx_ops.rx_init = wil_rx_init;
+	wil->txrx_ops.rx_fini = wil_rx_fini;
+}

drivers/net/wireless/ath/wil6210/txrx.h

@@ -570,6 +570,12 @@ static inline int wil_ring_avail_tx(struct wil_ring *ring)
 	return ring->size - wil_ring_used_tx(ring) - 1;
 }
 
+static inline int wil_get_min_tx_ring_id(struct wil6210_priv *wil)
+{
+	/* In Enhanced DMA ring 0 is reserved for RX */
+	return wil->use_enhanced_dma_hw ? 1 : 0;
+}
+
 void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev);
 void wil_rx_reorder(struct wil6210_priv *wil, struct sk_buff *skb);
 void wil_rx_bar(struct wil6210_priv *wil, struct wil6210_vif *vif,
@@ -578,5 +584,7 @@ struct wil_tid_ampdu_rx *wil_tid_ampdu_rx_alloc(struct wil6210_priv *wil,
 						int size, u16 ssn);
 void wil_tid_ampdu_rx_free(struct wil6210_priv *wil,
 			   struct wil_tid_ampdu_rx *r);
+void wil_tx_data_init(struct wil_ring_tx_data *txdata);
+void wil_init_txrx_ops_legacy_dma(struct wil6210_priv *wil);
 
 #endif /* WIL6210_TXRX_H */

drivers/net/wireless/ath/wil6210/txrx_edma.c

+/*
+ * Copyright (c) 2012-2018 The Linux Foundation. All rights reserved.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/etherdevice.h>
+#include <linux/moduleparam.h>
+#include <linux/prefetch.h>
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include "wil6210.h"
+#include "txrx_edma.h"
+#include "txrx.h"
+
+#define WIL_EDMA_MAX_DATA_OFFSET (2)
+
+static void wil_tx_desc_unmap_edma(struct device *dev,
+				   struct wil_tx_enhanced_desc *d,
+				   struct wil_ctx *ctx)
+{
+	dma_addr_t pa = wil_tx_desc_get_addr_edma(&d->dma);
+	u16 dmalen = le16_to_cpu(d->dma.length);
+
+	switch (ctx->mapped_as) {
+	case wil_mapped_as_single:
+		dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE);
+		break;
+	case wil_mapped_as_page:
+		dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE);
+		break;
+	default:
+		break;
+	}
+}
+
+static int wil_find_free_sring(struct wil6210_priv *wil)
+{
+	int i;
+
+	for (i = 0; i < WIL6210_MAX_STATUS_RINGS; i++) {
+		if (!wil->srings[i].va)
+			return i;
+	}
+
+	return -EINVAL;
+}
+
+static void wil_sring_free(struct wil6210_priv *wil,
+			   struct wil_status_ring *sring)
+{
+	struct device *dev = wil_to_dev(wil);
+	size_t sz;
+
+	if (!sring || !sring->va)
+		return;
+
+	sz = sring->elem_size * sring->size;
+
+	wil_dbg_misc(wil, "status_ring_free, size(bytes)=%zu, 0x%p:%pad\n",
+		     sz, sring->va, &sring->pa);
+
+	dma_free_coherent(dev, sz, (void *)sring->va, sring->pa);
+	sring->pa = 0;
+	sring->va = NULL;
+}
+
+static int wil_sring_alloc(struct wil6210_priv *wil,
+			   struct wil_status_ring *sring)
+{
+	struct device *dev = wil_to_dev(wil);
+	size_t sz = sring->elem_size * sring->size;
+
+	wil_dbg_misc(wil, "status_ring_alloc: size=%zu\n", sz);
+
+	if (sz == 0) {
+		wil_err(wil, "Cannot allocate a zero size status ring\n");
+		return -EINVAL;
+	}
+
+	sring->swhead = 0;
+
+	/* Status messages are allocated and initialized to 0. This is necessary
+	 * since DR bit should be initialized to 0.
+	 */
+	sring->va = dma_zalloc_coherent(dev, sz, &sring->pa, GFP_KERNEL);
+	if (!sring->va)
+		return -ENOMEM;
+
+	wil_dbg_misc(wil, "status_ring[%d] 0x%p:%pad\n", sring->size, sring->va,
+		     &sring->pa);
+
+	return 0;
+}
+
+static int wil_tx_init_edma(struct wil6210_priv *wil)
+{
+	int ring_id = wil_find_free_sring(wil);
+	struct wil_status_ring *sring;
+	int rc;
+	u16 status_ring_size;
+
+	if (wil->tx_status_ring_order < WIL_SRING_SIZE_ORDER_MIN ||
+	    wil->tx_status_ring_order > WIL_SRING_SIZE_ORDER_MAX)
+		wil->tx_status_ring_order = WIL_TX_SRING_SIZE_ORDER_DEFAULT;
+
+	status_ring_size = 1 << wil->tx_status_ring_order;
+
+	wil_dbg_misc(wil, "init TX sring: size=%u, ring_id=%u\n",
+		     status_ring_size, ring_id);
+
+	if (ring_id < 0)
+		return ring_id;
+
+	/* Allocate Tx status ring. Tx descriptor rings will be
+	 * allocated on WMI connect event
+	 */
+	sring = &wil->srings[ring_id];
+
+	sring->is_rx = false;
+	sring->size = status_ring_size;
+	sring->elem_size = sizeof(struct wil_ring_tx_status);
+	rc = wil_sring_alloc(wil, sring);
+	if (rc)
+		return rc;
+
+	rc = wil_wmi_tx_sring_cfg(wil, ring_id);
+	if (rc)
+		goto out_free;
+
+	sring->desc_rdy_pol = 1;
+	wil->tx_sring_idx = ring_id;
+
+	return 0;
+out_free:
+	wil_sring_free(wil, sring);
+	return rc;
+}
+
+/**
+ * Allocate one skb for Rx descriptor RING
+ */
+static int wil_ring_alloc_skb_edma(struct wil6210_priv *wil,
+				   struct wil_ring *ring, u32 i)
+{
+	struct device *dev = wil_to_dev(wil);
+	unsigned int sz = wil->rx_buf_len + ETH_HLEN +
+		WIL_EDMA_MAX_DATA_OFFSET;
+	dma_addr_t pa;
+	u16 buff_id;
+	struct list_head *active = &wil->rx_buff_mgmt.active;
+	struct list_head *free = &wil->rx_buff_mgmt.free;
+	struct wil_rx_buff *rx_buff;
+	struct wil_rx_buff *buff_arr = wil->rx_buff_mgmt.buff_arr;
+	struct sk_buff *skb;
+	struct wil_rx_enhanced_desc dd, *d = &dd;
+	struct wil_rx_enhanced_desc *_d = (struct wil_rx_enhanced_desc *)
+		&ring->va[i].rx.enhanced;
+
+	if (unlikely(list_empty(free))) {
+		wil->rx_buff_mgmt.free_list_empty_cnt++;
+		return -EAGAIN;
+	}
+
+	skb = dev_alloc_skb(sz);
+	if (unlikely(!skb))
+		return -ENOMEM;
+
+	skb_put(skb, sz);
+
+	pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE);
+	if (unlikely(dma_mapping_error(dev, pa))) {
+		kfree_skb(skb);
+		return -ENOMEM;
+	}
+
+	/* Get the buffer ID - the index of the rx buffer in the buff_arr */
+	rx_buff = list_first_entry(free, struct wil_rx_buff, list);
+	buff_id = rx_buff->id;
+
+	/* Move a buffer from the free list to the active list */
+	list_move(&rx_buff->list, active);
+
+	buff_arr[buff_id].skb = skb;
+
+	wil_desc_set_addr_edma(&d->dma.addr, &d->dma.addr_high_high, pa);
+	d->dma.length = cpu_to_le16(sz);
+	d->mac.buff_id = cpu_to_le16(buff_id);
+	*_d = *d;
+
+	/* Save the physical address in skb->cb for later use in dma_unmap */
+	memcpy(skb->cb, &pa, sizeof(pa));
+
+	return 0;
+}
+
+static int wil_rx_refill_edma(struct wil6210_priv *wil)
+{
+	struct wil_ring *ring = &wil->ring_rx;
+	u32 next_head;
+	int rc = 0;
+	u32 swtail = *ring->edma_rx_swtail.va;
+
+	for (; next_head = wil_ring_next_head(ring), (next_head != swtail);
+	     ring->swhead = next_head) {
+		rc = wil_ring_alloc_skb_edma(wil, ring, ring->swhead);
+		if (unlikely(rc)) {
+			if (rc == -EAGAIN)
+				wil_dbg_txrx(wil, "No free buffer ID found\n");
+			else
+				wil_err_ratelimited(wil,
+						    "Error %d in refill desc[%d]\n",
+						    rc, ring->swhead);
+			break;
+		}
+	}
+
+	/* make sure all writes to descriptors (shared memory) are done before
+	 * committing them to HW
+	 */
+	wmb();
+
+	wil_w(wil, ring->hwtail, ring->swhead);
+
+	return rc;
+}
+
+static void wil_move_all_rx_buff_to_free_list(struct wil6210_priv *wil,
+					      struct wil_ring *ring)
+{
+	struct device *dev = wil_to_dev(wil);
+	u32 next_tail;
+	u32 swhead = (ring->swhead + 1) % ring->size;
+	dma_addr_t pa;
+	u16 dmalen;
+
+	for (; next_tail = wil_ring_next_tail(ring), (next_tail != swhead);
+	     ring->swtail = next_tail) {
+		struct wil_rx_enhanced_desc dd, *d = &dd;
+		struct wil_rx_enhanced_desc *_d =
+			(struct wil_rx_enhanced_desc *)
+			&ring->va[ring->swtail].rx.enhanced;
+		struct sk_buff *skb;
+		u16 buff_id;
+
+		*d = *_d;
+		pa = wil_rx_desc_get_addr_edma(&d->dma);
+		dmalen = le16_to_cpu(d->dma.length);
+		dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE);
+
+		/* Extract the SKB from the rx_buff management array */
+		buff_id = __le16_to_cpu(d->mac.buff_id);
+		if (buff_id >= wil->rx_buff_mgmt.size) {
+			wil_err(wil, "invalid buff_id %d\n", buff_id);
+			continue;
+		}
+		skb = wil->rx_buff_mgmt.buff_arr[buff_id].skb;
+		wil->rx_buff_mgmt.buff_arr[buff_id].skb = NULL;
+		if (unlikely(!skb))
+			wil_err(wil, "No Rx skb at buff_id %d\n", buff_id);
+		else
+			kfree_skb(skb);
+
+		/* Move the buffer from the active to the free list */
+		list_move(&wil->rx_buff_mgmt.buff_arr[buff_id].list,
+			  &wil->rx_buff_mgmt.free);
+	}
+}
+
+static void wil_free_rx_buff_arr(struct wil6210_priv *wil)
+{
+	struct wil_ring *ring = &wil->ring_rx;
+
+	if (!wil->rx_buff_mgmt.buff_arr)
+		return;
+
+	/* Move all the buffers to the free list in case active list is
+	 * not empty in order to release all SKBs before deleting the array
+	 */
+	wil_move_all_rx_buff_to_free_list(wil, ring);
+
+	kfree(wil->rx_buff_mgmt.buff_arr);
+	wil->rx_buff_mgmt.buff_arr = NULL;
+}
+
+static int wil_init_rx_buff_arr(struct wil6210_priv *wil,
+				size_t size)
+{
+	struct wil_rx_buff *buff_arr;
+	struct list_head *active = &wil->rx_buff_mgmt.active;
+	struct list_head *free = &wil->rx_buff_mgmt.free;
+	int i;
+
+	wil->rx_buff_mgmt.buff_arr = kcalloc(size, sizeof(struct wil_rx_buff),
+					     GFP_KERNEL);
+	if (!wil->rx_buff_mgmt.buff_arr)
+		return -ENOMEM;
+
+	/* Set list heads */
+	INIT_LIST_HEAD(active);
+	INIT_LIST_HEAD(free);
+
+	/* Linkify the list */
+	buff_arr = wil->rx_buff_mgmt.buff_arr;
+	for (i = 0; i < size; i++) {
+		list_add(&buff_arr[i].list, free);
+		buff_arr[i].id = i;
+	}
+
+	wil->rx_buff_mgmt.size = size;
+
+	return 0;
+}
+
+static int wil_init_rx_sring(struct wil6210_priv *wil,
+			     u16 status_ring_size,
+			     size_t elem_size,
+			     u16 ring_id)
+{
+	struct wil_status_ring *sring = &wil->srings[ring_id];
+	int rc;
+
+	wil_dbg_misc(wil, "init RX sring: size=%u, ring_id=%u\n", sring->size,
+		     ring_id);
+
+	memset(&sring->rx_data, 0, sizeof(sring->rx_data));
+
+	sring->is_rx = true;
+	sring->size = status_ring_size;
+	sring->elem_size = elem_size;
+	rc = wil_sring_alloc(wil, sring);
+	if (rc)
+		return rc;
+
+	rc = wil_wmi_rx_sring_add(wil, ring_id);
+	if (rc)
+		goto out_free;
+
+	sring->desc_rdy_pol = 1;
+
+	return 0;
+out_free:
+	wil_sring_free(wil, sring);
+	return rc;
+}
+
+static int wil_ring_alloc_desc_ring(struct wil6210_priv *wil,
+				    struct wil_ring *ring)
+{
+	struct device *dev = wil_to_dev(wil);
+	size_t sz = ring->size * sizeof(ring->va[0]);
+
+	wil_dbg_misc(wil, "alloc_desc_ring:\n");
+
+	BUILD_BUG_ON(sizeof(ring->va[0]) != 32);
+
+	ring->swhead = 0;
+	ring->swtail = 0;
+	ring->ctx = kcalloc(ring->size, sizeof(ring->ctx[0]), GFP_KERNEL);
+	if (!ring->ctx)
+		goto err;
+
+	ring->va = dma_zalloc_coherent(dev, sz, &ring->pa, GFP_KERNEL);
+	if (!ring->va)
+		goto err_free_ctx;
+
+	if (ring->is_rx) {
+		sz = sizeof(*ring->edma_rx_swtail.va);
+		ring->edma_rx_swtail.va =
+			dma_zalloc_coherent(dev, sz, &ring->edma_rx_swtail.pa,
+					    GFP_KERNEL);
+		if (!ring->edma_rx_swtail.va)
+			goto err_free_va;
+	}
+
+	wil_dbg_misc(wil, "%s ring[%d] 0x%p:%pad 0x%p\n",
+		     ring->is_rx ? "RX" : "TX",
+		     ring->size, ring->va, &ring->pa, ring->ctx);
+
+	return 0;
+err_free_va:
+	dma_free_coherent(dev, ring->size * sizeof(ring->va[0]),
+			  (void *)ring->va, ring->pa);
+	ring->va = NULL;
+err_free_ctx:
+	kfree(ring->ctx);
+	ring->ctx = NULL;
+err:
+	return -ENOMEM;
+}
+
+static void wil_ring_free_edma(struct wil6210_priv *wil, struct wil_ring *ring)
+{
+	struct device *dev = wil_to_dev(wil);
+	size_t sz;
+	int ring_index = 0;
+
+	if (!ring->va)
+		return;
+
+	sz = ring->size * sizeof(ring->va[0]);
+
+	lockdep_assert_held(&wil->mutex);
+	if (ring->is_rx) {
+		wil_dbg_misc(wil, "free Rx ring [%d] 0x%p:%pad 0x%p\n",
+			     ring->size, ring->va,
+			     &ring->pa, ring->ctx);
+
+		wil_move_all_rx_buff_to_free_list(wil, ring);
+		goto out;
+	}
+
+	/* TX ring */
+	ring_index = ring - wil->ring_tx;
+
+	wil_dbg_misc(wil, "free Tx ring %d [%d] 0x%p:%pad 0x%p\n",
+		     ring_index, ring->size, ring->va,
+		     &ring->pa, ring->ctx);
+
+	while (!wil_ring_is_empty(ring)) {
+		struct wil_ctx *ctx;
+
+		struct wil_tx_enhanced_desc dd, *d = &dd;
+		struct wil_tx_enhanced_desc *_d =
+			(struct wil_tx_enhanced_desc *)
+			&ring->va[ring->swtail].tx.enhanced;
+
+		ctx = &ring->ctx[ring->swtail];
+		if (!ctx) {
+			wil_dbg_txrx(wil,
+				     "ctx(%d) was already completed\n",
+				     ring->swtail);
+			ring->swtail = wil_ring_next_tail(ring);
+			continue;
+		}
+		*d = *_d;
+		wil_tx_desc_unmap_edma(dev, d, ctx);
+		if (ctx->skb)
+			dev_kfree_skb_any(ctx->skb);
+		ring->swtail = wil_ring_next_tail(ring);
+	}
+
+out:
+	dma_free_coherent(dev, sz, (void *)ring->va, ring->pa);
+	kfree(ring->ctx);
+	ring->pa = 0;
+	ring->va = NULL;
+	ring->ctx = NULL;
+}
+
+static int wil_init_rx_desc_ring(struct wil6210_priv *wil, u16 desc_ring_size,
+				 int status_ring_id)
+{
+	struct wil_ring *ring = &wil->ring_rx;
+	int rc;
+
+	wil_dbg_misc(wil, "init RX desc ring\n");
+
+	ring->size = desc_ring_size;
+	ring->is_rx = true;
+	rc = wil_ring_alloc_desc_ring(wil, ring);
+	if (rc)
+		return rc;
+
+	rc = wil_wmi_rx_desc_ring_add(wil, status_ring_id);
+	if (rc)
+		goto out_free;
+
+	return 0;
+out_free:
+	wil_ring_free_edma(wil, ring);
+	return rc;
+}
+
+static void wil_rx_buf_len_init_edma(struct wil6210_priv *wil)
+{
+	wil->rx_buf_len = rx_large_buf ?
+		WIL_MAX_ETH_MTU : TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD;
+}
+
+static int wil_rx_init_edma(struct wil6210_priv *wil, u16 desc_ring_size)
+{
+	u16 status_ring_size;
+	struct wil_ring *ring = &wil->ring_rx;
+	int rc;
+	size_t elem_size = wil->use_compressed_rx_status ?
+		sizeof(struct wil_rx_status_compressed) :
+		sizeof(struct wil_rx_status_extended);
+	int i;
+	u16 max_rx_pl_per_desc;
+
+	if (wil->rx_status_ring_order < WIL_SRING_SIZE_ORDER_MIN ||
+	    wil->rx_status_ring_order > WIL_SRING_SIZE_ORDER_MAX)
+		wil->rx_status_ring_order = WIL_RX_SRING_SIZE_ORDER_DEFAULT;
+
+	status_ring_size = 1 << wil->rx_status_ring_order;
+
+	wil_dbg_misc(wil,
+		     "rx_init, desc_ring_size=%u, status_ring_size=%u, elem_size=%zu\n",
+		     desc_ring_size, status_ring_size, elem_size);
+
+	wil_rx_buf_len_init_edma(wil);
+
+	max_rx_pl_per_desc = wil->rx_buf_len + ETH_HLEN +
+		WIL_EDMA_MAX_DATA_OFFSET;
+
+	/* Use debugfs dbg_num_rx_srings if set, reserve one sring for TX */
+	if (wil->num_rx_status_rings > WIL6210_MAX_STATUS_RINGS - 1)
+		wil->num_rx_status_rings = WIL6210_MAX_STATUS_RINGS - 1;
+
+	wil_dbg_misc(wil, "rx_init: allocate %d status rings\n",
+		     wil->num_rx_status_rings);
+
+	rc = wil_wmi_cfg_def_rx_offload(wil, max_rx_pl_per_desc);
+	if (rc)
+		return rc;
+
+	/* Allocate status ring */
+	for (i = 0; i < wil->num_rx_status_rings; i++) {
+		int sring_id = wil_find_free_sring(wil);
+
+		if (sring_id < 0) {
+			rc = -EFAULT;
+			goto err_free_status;
+		}
+		rc = wil_init_rx_sring(wil, status_ring_size, elem_size,
+				       sring_id);
+		if (rc)
+			goto err_free_status;
+	}
+
+	/* Allocate descriptor ring */
+	rc = wil_init_rx_desc_ring(wil, desc_ring_size,
+				   WIL_DEFAULT_RX_STATUS_RING_ID);
+	if (rc)
+		goto err_free_status;
+
+	if (wil->rx_buff_id_count >= status_ring_size) {
+		wil_info(wil,
+			 "rx_buff_id_count %d exceeds sring_size %d. set it to %d\n",
+			 wil->rx_buff_id_count, status_ring_size,
+			 status_ring_size - 1);
+		wil->rx_buff_id_count = status_ring_size - 1;
+	}
+
+	/* Allocate Rx buffer array */
+	rc = wil_init_rx_buff_arr(wil, wil->rx_buff_id_count);
+	if (rc)
+		goto err_free_desc;
+
+	/* Fill descriptor ring with credits */
+	rc = wil_rx_refill_edma(wil);
+	if (rc)
+		goto err_free_rx_buff_arr;
+
+	return 0;
+err_free_rx_buff_arr:
+	wil_free_rx_buff_arr(wil);
+err_free_desc:
+	wil_ring_free_edma(wil, ring);
+err_free_status:
+	for (i = 0; i < wil->num_rx_status_rings; i++)
+		wil_sring_free(wil, &wil->srings[i]);
+
+	return rc;
+}
+
+static int wil_ring_init_tx_edma(struct wil6210_vif *vif, int ring_id,
+				 int size, int cid, int tid)
+{
+	struct wil6210_priv *wil = vif_to_wil(vif);
+	int rc;
+	struct wil_ring *ring = &wil->ring_tx[ring_id];
+	struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_id];
+
+	lockdep_assert_held(&wil->mutex);
+
+	wil_dbg_misc(wil,
+		     "init TX ring: ring_id=%u, cid=%u, tid=%u, sring_id=%u\n",
+		     ring_id, cid, tid, wil->tx_sring_idx);
+
+	wil_tx_data_init(txdata);
+	ring->size = size;
+	rc = wil_ring_alloc_desc_ring(wil, ring);
+	if (rc)
+		goto out;
+
+	wil->ring2cid_tid[ring_id][0] = cid;
+	wil->ring2cid_tid[ring_id][1] = tid;
+	if (!vif->privacy)
+		txdata->dot1x_open = true;
+
+	rc = wil_wmi_tx_desc_ring_add(vif, ring_id, cid, tid);
+	if (rc) {
+		wil_err(wil, "WMI_TX_DESC_RING_ADD_CMD failed\n");
+		goto out_free;
+	}
+
+	if (txdata->dot1x_open && agg_wsize >= 0)
+		wil_addba_tx_request(wil, ring_id, agg_wsize);
+
+	return 0;
+ out_free:
+	spin_lock_bh(&txdata->lock);
+	txdata->dot1x_open = false;
+	txdata->enabled = 0;
+	spin_unlock_bh(&txdata->lock);
+	wil_ring_free_edma(wil, ring);
+	wil->ring2cid_tid[ring_id][0] = WIL6210_MAX_CID;
+	wil->ring2cid_tid[ring_id][1] = 0;
+
+ out:
+	return rc;
+}
+
+static int wil_ring_init_bcast_edma(struct wil6210_vif *vif, int ring_id,
+				    int size)
+{
+	struct wil6210_priv *wil = vif_to_wil(vif);
+	struct wil_ring *ring = &wil->ring_tx[ring_id];
+	int rc;
+	struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_id];
+
+	wil_dbg_misc(wil, "init bcast: ring_id=%d, sring_id=%d\n",
+		     ring_id, wil->tx_sring_idx);
+
+	lockdep_assert_held(&wil->mutex);
+
+	wil_tx_data_init(txdata);
+	ring->size = size;
+	ring->is_rx = false;
+	rc = wil_ring_alloc_desc_ring(wil, ring);
+	if (rc)
+		goto out;
+
+	wil->ring2cid_tid[ring_id][0] = WIL6210_MAX_CID; /* CID */
+	wil->ring2cid_tid[ring_id][1] = 0; /* TID */
+	if (!vif->privacy)
+		txdata->dot1x_open = true;
+
+	rc = wil_wmi_bcast_desc_ring_add(vif, ring_id);
+	if (rc)
+		goto out_free;
+
+	return 0;
+
+ out_free:
+	spin_lock_bh(&txdata->lock);
+	txdata->enabled = 0;
+	txdata->dot1x_open = false;
+	spin_unlock_bh(&txdata->lock);
+	wil_ring_free_edma(wil, ring);
+
+out:
+	return rc;
+}
+
+static void wil_tx_fini_edma(struct wil6210_priv *wil)
+{
+	struct wil_status_ring *sring = &wil->srings[wil->tx_sring_idx];
+
+	wil_dbg_misc(wil, "free TX sring\n");
+
+	wil_sring_free(wil, sring);
+}
+
+static void wil_rx_data_free(struct wil_status_ring *sring)
+{
+	if (!sring)
+		return;
+
+	kfree_skb(sring->rx_data.skb);
+	sring->rx_data.skb = NULL;
+}
+
+static void wil_rx_fini_edma(struct wil6210_priv *wil)
+{
+	struct wil_ring *ring = &wil->ring_rx;
+	int i;
+
+	wil_dbg_misc(wil, "rx_fini_edma\n");
+
+	wil_ring_free_edma(wil, ring);
+
+	for (i = 0; i < wil->num_rx_status_rings; i++) {
+		wil_rx_data_free(&wil->srings[i]);
+		wil_sring_free(wil, &wil->srings[i]);
+	}
+
+	wil_free_rx_buff_arr(wil);
+}
+
+void wil_init_txrx_ops_edma(struct wil6210_priv *wil)
+{
+	wil->txrx_ops.configure_interrupt_moderation =
+		wil_configure_interrupt_moderation_edma;
+	/* TX ops */
+	wil->txrx_ops.ring_init_tx = wil_ring_init_tx_edma;
+	wil->txrx_ops.ring_fini_tx = wil_ring_free_edma;
+	wil->txrx_ops.ring_init_bcast = wil_ring_init_bcast_edma;
+	wil->txrx_ops.tx_init = wil_tx_init_edma;
+	wil->txrx_ops.tx_fini = wil_tx_fini_edma;
+	/* RX ops */
+	wil->txrx_ops.rx_init = wil_rx_init_edma;
+	wil->txrx_ops.rx_fini = wil_rx_fini_edma;
+}
+

drivers/net/wireless/ath/wil6210/txrx_edma.h

@@ -19,6 +19,25 @@
 
 #include "wil6210.h"
 
+/* limit status ring size in range [ring size..max ring size] */
+#define WIL_SRING_SIZE_ORDER_MIN	(WIL_RING_SIZE_ORDER_MIN)
+#define WIL_SRING_SIZE_ORDER_MAX	(WIL_RING_SIZE_ORDER_MAX)
+/* RX sring order should be bigger than RX ring order */
+#define WIL_RX_SRING_SIZE_ORDER_DEFAULT	(11)
+#define WIL_TX_SRING_SIZE_ORDER_DEFAULT	(12)
+#define WIL_RX_BUFF_ARR_SIZE_DEFAULT (1536)
+
+#define WIL_DEFAULT_RX_STATUS_RING_ID 0
+#define WIL_RX_DESC_RING_ID 0
+#define WIL_RX_STATUS_IRQ_IDX 0
+#define WIL_TX_STATUS_IRQ_IDX 1
+
+#define WIL_EDMA_AGG_WATERMARK (0xffff)
+#define WIL_EDMA_AGG_WATERMARK_POS (16)
+
+#define WIL_EDMA_IDLE_TIME_LIMIT_USEC (50)
+#define WIL_EDMA_TIME_UNIT_CLK_CYCLES (330) /* fits 1 usec */
+
 /* Enhanced Rx descriptor - MAC part
  * [dword 0] : Reserved
  * [dword 1] : Reserved
@@ -216,7 +235,7 @@ struct wil_ring_tx_status {
  *	bit 22..23 : CB mode:2 - The CB Mode: 0-DMG, 1-EDMG, 2-Wide
  *	bit 24..27 : Data Offset:4 - The data offset, a code that describe the
  *		     payload shift from the beginning of the buffer:
- *		     0 - 0 Bytes, 1 - 2 Bytes, 2 - 6 Bytes
+ *		     0 - 0 Bytes, 3 - 2 Bytes
  *	bit     28 : A-MSDU Present:1 - The QoS (b7) A-MSDU present field
  *	bit     29 : A-MSDU Type:1 The QoS (b8) A-MSDU Type field
  *	bit     30 : A-MPDU:1 - Packet is part of aggregated MPDU
@@ -286,5 +305,38 @@ struct wil_rx_status_extended {
 	struct wil_rx_status_extension ext;
 };
 
+static inline u32 wil_ring_next_head(struct wil_ring *ring)
+{
+	return (ring->swhead + 1) % ring->size;
+}
+
+static inline void wil_desc_set_addr_edma(struct wil_ring_dma_addr *addr,
+					  __le16 *addr_high_high,
+					  dma_addr_t pa)
+{
+	addr->addr_low = cpu_to_le32(lower_32_bits(pa));
+	addr->addr_high = cpu_to_le16((u16)upper_32_bits(pa));
+	*addr_high_high = cpu_to_le16((u16)(upper_32_bits(pa) >> 16));
+}
+
+static inline
+dma_addr_t wil_tx_desc_get_addr_edma(struct wil_ring_tx_enhanced_dma *dma)
+{
+	return le32_to_cpu(dma->addr.addr_low) |
+			   ((u64)le16_to_cpu(dma->addr.addr_high) << 32) |
+			   ((u64)le16_to_cpu(dma->addr_high_high) << 48);
+}
+
+static inline
+dma_addr_t wil_rx_desc_get_addr_edma(struct wil_ring_rx_enhanced_dma *dma)
+{
+	return le32_to_cpu(dma->addr.addr_low) |
+			   ((u64)le16_to_cpu(dma->addr.addr_high) << 32) |
+			   ((u64)le16_to_cpu(dma->addr_high_high) << 48);
+}
+
+void wil_configure_interrupt_moderation_edma(struct wil6210_priv *wil);
+void wil_init_txrx_ops_edma(struct wil6210_priv *wil);
+
 #endif /* WIL6210_TXRX_EDMA_H */
 

drivers/net/wireless/ath/wil6210/wil6210.h

@@ -37,6 +37,9 @@ extern bool rx_large_buf;
 extern bool debug_fw;
 extern bool disable_ap_sme;
 
+struct wil6210_priv;
+struct wil6210_vif;
+
 #define WIL_NAME "wil6210"
 
 #define WIL_FW_NAME_DEFAULT "wil6210.fw"
@@ -307,6 +310,18 @@ struct RGF_ICR {
 #define RGF_CAF_PLL_LOCK_STATUS		(0x88afec)
 	#define BIT_CAF_OSC_DIG_XTAL_STABLE	BIT(0)
 
+/* eDMA */
+#define RGF_INT_COUNT_ON_SPECIAL_EVT	(0x8b62d8)
+
+#define RGF_INT_CTRL_INT_GEN_CFG_0	(0x8bc000)
+#define RGF_INT_CTRL_INT_GEN_CFG_1	(0x8bc004)
+#define RGF_INT_GEN_TIME_UNIT_LIMIT	(0x8bc0c8)
+
+#define RGF_INT_GEN_CTRL		(0x8bc0ec)
+	#define BIT_CONTROL_0			BIT(0)
+
+#define RGF_INT_GEN_IDLE_TIME_LIMIT	(0x8bc134)
+
 #define USER_EXT_USER_PMU_3		(0x88d00c)
 	#define BIT_PMU_DEVICE_RDY		BIT(0)
 
@@ -512,6 +527,24 @@ struct wil_status_ring {
 	struct wil_ring_rx_data rx_data;
 };
 
+/**
+ * struct tx_rx_ops - different TX/RX ops for legacy and enhanced
+ * DMA flow
+ */
+struct wil_txrx_ops {
+	void (*configure_interrupt_moderation)(struct wil6210_priv *wil);
+	/* TX ops */
+	int (*ring_init_tx)(struct wil6210_vif *vif, int ring_id,
+			    int size, int cid, int tid);
+	void (*ring_fini_tx)(struct wil6210_priv *wil, struct wil_ring *ring);
+	int (*ring_init_bcast)(struct wil6210_vif *vif, int id, int size);
+	int (*tx_init)(struct wil6210_priv *wil);
+	void (*tx_fini)(struct wil6210_priv *wil);
+	/* RX ops */
+	int (*rx_init)(struct wil6210_priv *wil, u16 ring_size);
+	void (*rx_fini)(struct wil6210_priv *wil);
+};
+
 /**
  * Additional data for Tx ring
  */
@@ -848,12 +881,15 @@ struct wil6210_priv {
 	struct wil_ring ring_tx[WIL6210_MAX_TX_RINGS];
 	struct wil_ring_tx_data ring_tx_data[WIL6210_MAX_TX_RINGS];
 	struct wil_status_ring srings[WIL6210_MAX_STATUS_RINGS];
-	int num_rx_status_rings;
+	u8 num_rx_status_rings;
+	int tx_sring_idx;
 	u8 ring2cid_tid[WIL6210_MAX_TX_RINGS][2]; /* [0] - CID, [1] - TID */
 	struct wil_sta_info sta[WIL6210_MAX_CID];
 	u32 ring_idle_trsh; /* HW fetches up to 16 descriptors at once  */
 	u32 dma_addr_size; /* indicates dma addr size */
 	struct wil_rx_buff_mgmt rx_buff_mgmt;
+	bool use_enhanced_dma_hw;
+	struct wil_txrx_ops txrx_ops;
 
 	struct mutex mutex; /* for wil6210_priv access in wil_{up|down} */
 	/* statistics */
@@ -896,6 +932,12 @@ struct wil6210_priv {
 	u32 rgf_fw_assert_code_addr;
 	u32 rgf_ucode_assert_code_addr;
 	u32 iccm_base;
+
+	/* relevant only for eDMA */
+	bool use_compressed_rx_status;
+	u32 rx_status_ring_order;
+	u32 tx_status_ring_order;
+	u32 rx_buff_id_count;
 };
 
 #define wil_to_wiphy(i) (i->wiphy)
@@ -1168,14 +1210,10 @@ void wil_probe_client_flush(struct wil6210_vif *vif);
 void wil_probe_client_worker(struct work_struct *work);
 void wil_disconnect_worker(struct work_struct *work);
 
-int wil_rx_init(struct wil6210_priv *wil, u16 size);
-void wil_rx_fini(struct wil6210_priv *wil);
+void wil_init_txrx_ops(struct wil6210_priv *wil);
 
 /* TX API */
-int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size,
-		      int cid, int tid);
-void wil_ring_fini_tx(struct wil6210_priv *wil, int id);
-int wil_tx_init(struct wil6210_vif *vif, int cid);
+int wil_ring_init_tx(struct wil6210_vif *vif, int cid);
 int wil_vring_init_bcast(struct wil6210_vif *vif, int id, int size);
 int wil_bcast_init(struct wil6210_vif *vif);
 void wil_bcast_fini(struct wil6210_vif *vif);
@@ -1227,4 +1265,14 @@ int wmi_start_sched_scan(struct wil6210_priv *wil,
 int wmi_stop_sched_scan(struct wil6210_priv *wil);
 int wmi_mgmt_tx(struct wil6210_vif *vif, const u8 *buf, size_t len);
 
+/* WMI for enhanced DMA */
+int wil_wmi_tx_sring_cfg(struct wil6210_priv *wil, int ring_id);
+int wil_wmi_cfg_def_rx_offload(struct wil6210_priv *wil,
+			       u16 max_rx_pl_per_desc);
+int wil_wmi_rx_sring_add(struct wil6210_priv *wil, u16 ring_id);
+int wil_wmi_rx_desc_ring_add(struct wil6210_priv *wil, int status_ring_id);
+int wil_wmi_tx_desc_ring_add(struct wil6210_vif *vif, int ring_id, int cid,
+			     int tid);
+int wil_wmi_bcast_desc_ring_add(struct wil6210_vif *vif, int ring_id);
+
 #endif /* __WIL6210_H__ */

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;
+}

drivers/net/wireless/ath/wil6210/wmi.h

@@ -148,8 +148,8 @@ enum wmi_command_id {
 	WMI_CFG_RX_CHAIN_CMDID				= 0x820,
 	WMI_VRING_CFG_CMDID				= 0x821,
 	WMI_BCAST_VRING_CFG_CMDID			= 0x822,
-	WMI_VRING_BA_EN_CMDID				= 0x823,
-	WMI_VRING_BA_DIS_CMDID				= 0x824,
+	WMI_RING_BA_EN_CMDID				= 0x823,
+	WMI_RING_BA_DIS_CMDID				= 0x824,
 	WMI_RCP_ADDBA_RESP_CMDID			= 0x825,
 	WMI_RCP_DELBA_CMDID				= 0x826,
 	WMI_SET_SSID_CMDID				= 0x827,
@@ -163,6 +163,7 @@ enum wmi_command_id {
 	WMI_BF_SM_MGMT_CMDID				= 0x838,
 	WMI_BF_RXSS_MGMT_CMDID				= 0x839,
 	WMI_BF_TRIG_CMDID				= 0x83A,
+	WMI_RCP_ADDBA_RESP_EDMA_CMDID			= 0x83B,
 	WMI_LINK_MAINTAIN_CFG_WRITE_CMDID		= 0x842,
 	WMI_LINK_MAINTAIN_CFG_READ_CMDID		= 0x843,
 	WMI_SET_SECTORS_CMDID				= 0x849,
@@ -235,6 +236,12 @@ enum wmi_command_id {
 	WMI_PRIO_TX_SECTORS_NUMBER_CMDID		= 0x9A6,
 	WMI_PRIO_TX_SECTORS_SET_DEFAULT_CFG_CMDID	= 0x9A7,
 	WMI_BF_CONTROL_CMDID				= 0x9AA,
+	WMI_TX_STATUS_RING_ADD_CMDID			= 0x9C0,
+	WMI_RX_STATUS_RING_ADD_CMDID			= 0x9C1,
+	WMI_TX_DESC_RING_ADD_CMDID			= 0x9C2,
+	WMI_RX_DESC_RING_ADD_CMDID			= 0x9C3,
+	WMI_BCAST_DESC_RING_ADD_CMDID			= 0x9C4,
+	WMI_CFG_DEF_RX_OFFLOAD_CMDID			= 0x9C5,
 	WMI_SCHEDULING_SCHEME_CMDID			= 0xA01,
 	WMI_FIXED_SCHEDULING_CONFIG_CMDID		= 0xA02,
 	WMI_ENABLE_FIXED_SCHEDULING_CMDID		= 0xA03,
@@ -781,18 +788,90 @@ struct wmi_lo_power_calib_from_otp_event {
 	u8 reserved[3];
 } __packed;
 
-/* WMI_VRING_BA_EN_CMDID */
-struct wmi_vring_ba_en_cmd {
-	u8 ringid;
+struct wmi_edma_ring_cfg {
+	__le64 ring_mem_base;
+	/* size in number of items */
+	__le16 ring_size;
+	u8 ring_id;
+	u8 reserved;
+} __packed;
+
+enum wmi_rx_msg_type {
+	WMI_RX_MSG_TYPE_COMPRESSED	= 0x00,
+	WMI_RX_MSG_TYPE_EXTENDED	= 0x01,
+};
+
+struct wmi_tx_status_ring_add_cmd {
+	struct wmi_edma_ring_cfg ring_cfg;
+	u8 irq_index;
+	u8 reserved[3];
+} __packed;
+
+struct wmi_rx_status_ring_add_cmd {
+	struct wmi_edma_ring_cfg ring_cfg;
+	u8 irq_index;
+	/* wmi_rx_msg_type */
+	u8 rx_msg_type;
+	u8 reserved[2];
+} __packed;
+
+struct wmi_cfg_def_rx_offload_cmd {
+	__le16 max_msdu_size;
+	__le16 max_rx_pl_per_desc;
+	u8 decap_trans_type;
+	u8 l2_802_3_offload_ctrl;
+	u8 l2_nwifi_offload_ctrl;
+	u8 vlan_id;
+	u8 nwifi_ds_trans_type;
+	u8 l3_l4_ctrl;
+	u8 reserved[6];
+} __packed;
+
+struct wmi_tx_desc_ring_add_cmd {
+	struct wmi_edma_ring_cfg ring_cfg;
+	__le16 max_msdu_size;
+	/* Correlated status ring (0-63) */
+	u8 status_ring_id;
+	u8 cid;
+	u8 tid;
+	u8 encap_trans_type;
+	u8 mac_ctrl;
+	u8 to_resolution;
+	u8 agg_max_wsize;
+	u8 reserved[3];
+	struct wmi_vring_cfg_schd schd_params;
+} __packed;
+
+struct wmi_rx_desc_ring_add_cmd {
+	struct wmi_edma_ring_cfg ring_cfg;
+	u8 irq_index;
+	/* 0-63 status rings */
+	u8 status_ring_id;
+	u8 reserved[2];
+	__le64 sw_tail_host_addr;
+} __packed;
+
+struct wmi_bcast_desc_ring_add_cmd {
+	struct wmi_edma_ring_cfg ring_cfg;
+	__le16 max_msdu_size;
+	/* Correlated status ring (0-63) */
+	u8 status_ring_id;
+	u8 encap_trans_type;
+	u8 reserved[4];
+} __packed;
+
+/* WMI_RING_BA_EN_CMDID */
+struct wmi_ring_ba_en_cmd {
+	u8 ring_id;
 	u8 agg_max_wsize;
 	__le16 ba_timeout;
 	u8 amsdu;
 	u8 reserved[3];
 } __packed;
 
-/* WMI_VRING_BA_DIS_CMDID */
-struct wmi_vring_ba_dis_cmd {
-	u8 ringid;
+/* WMI_RING_BA_DIS_CMDID */
+struct wmi_ring_ba_dis_cmd {
+	u8 ring_id;
 	u8 reserved;
 	__le16 reason;
 } __packed;
@@ -950,6 +1029,21 @@ struct wmi_rcp_addba_resp_cmd {
 	u8 reserved[2];
 } __packed;
 
+/* WMI_RCP_ADDBA_RESP_EDMA_CMDID */
+struct wmi_rcp_addba_resp_edma_cmd {
+	u8 cid;
+	u8 tid;
+	u8 dialog_token;
+	u8 reserved;
+	__le16 status_code;
+	/* ieee80211_ba_parameterset field to send */
+	__le16 ba_param_set;
+	__le16 ba_timeout;
+	u8 status_ring_id;
+	/* wmi_cfg_rx_chain_cmd_reorder_type */
+	u8 reorder_type;
+} __packed;
+
 /* WMI_RCP_DELBA_CMDID */
 struct wmi_rcp_delba_cmd {
 	/* Used for cid less than 8. For higher cid set
@@ -1535,7 +1629,7 @@ enum wmi_event_id {
 	WMI_BF_CTRL_DONE_EVENTID			= 0x1862,
 	WMI_NOTIFY_REQ_DONE_EVENTID			= 0x1863,
 	WMI_GET_STATUS_DONE_EVENTID			= 0x1864,
-	WMI_VRING_EN_EVENTID				= 0x1865,
+	WMI_RING_EN_EVENTID				= 0x1865,
 	WMI_GET_RF_STATUS_EVENTID			= 0x1866,
 	WMI_GET_BASEBAND_TYPE_EVENTID			= 0x1867,
 	WMI_VRING_SWITCH_TIMING_CONFIG_EVENTID		= 0x1868,
@@ -1587,6 +1681,11 @@ enum wmi_event_id {
 	WMI_PRIO_TX_SECTORS_NUMBER_EVENTID		= 0x19A6,
 	WMI_PRIO_TX_SECTORS_SET_DEFAULT_CFG_EVENTID	= 0x19A7,
 	WMI_BF_CONTROL_EVENTID				= 0x19AA,
+	WMI_TX_STATUS_RING_CFG_DONE_EVENTID		= 0x19C0,
+	WMI_RX_STATUS_RING_CFG_DONE_EVENTID		= 0x19C1,
+	WMI_TX_DESC_RING_CFG_DONE_EVENTID		= 0x19C2,
+	WMI_RX_DESC_RING_CFG_DONE_EVENTID		= 0x19C3,
+	WMI_CFG_DEF_RX_OFFLOAD_DONE_EVENTID		= 0x19C5,
 	WMI_SCHEDULING_SCHEME_EVENTID			= 0x1A01,
 	WMI_FIXED_SCHEDULING_CONFIG_COMPLETE_EVENTID	= 0x1A02,
 	WMI_ENABLE_FIXED_SCHEDULING_COMPLETE_EVENTID	= 0x1A03,
@@ -1997,6 +2096,49 @@ struct wmi_rcp_addba_resp_sent_event {
 	u8 reserved2[2];
 } __packed;
 
+/* WMI_TX_STATUS_RING_CFG_DONE_EVENTID */
+struct wmi_tx_status_ring_cfg_done_event {
+	u8 ring_id;
+	/* wmi_fw_status */
+	u8 status;
+	u8 reserved[2];
+	__le32 ring_tail_ptr;
+} __packed;
+
+/* WMI_RX_STATUS_RING_CFG_DONE_EVENTID */
+struct wmi_rx_status_ring_cfg_done_event {
+	u8 ring_id;
+	/* wmi_fw_status */
+	u8 status;
+	u8 reserved[2];
+	__le32 ring_tail_ptr;
+} __packed;
+
+/* WMI_CFG_DEF_RX_OFFLOAD_DONE_EVENTID */
+struct wmi_cfg_def_rx_offload_done_event {
+	/* wmi_fw_status */
+	u8 status;
+	u8 reserved[3];
+} __packed;
+
+/* WMI_TX_DESC_RING_CFG_DONE_EVENTID */
+struct wmi_tx_desc_ring_cfg_done_event {
+	u8 ring_id;
+	/* wmi_fw_status */
+	u8 status;
+	u8 reserved[2];
+	__le32 ring_tail_ptr;
+} __packed;
+
+/* WMI_RX_DESC_RING_CFG_DONE_EVENTID */
+struct wmi_rx_desc_ring_cfg_done_event {
+	u8 ring_id;
+	/* wmi_fw_status */
+	u8 status;
+	u8 reserved[2];
+	__le32 ring_tail_ptr;
+} __packed;
+
 /* WMI_RCP_ADDBA_REQ_EVENTID */
 struct wmi_rcp_addba_req_event {
 	/* Used for cid less than 8. For higher cid set
@@ -2047,9 +2189,9 @@ struct wmi_data_port_open_event {
 	u8 reserved[3];
 } __packed;
 
-/* WMI_VRING_EN_EVENTID */
-struct wmi_vring_en_event {
-	u8 vring_index;
+/* WMI_RING_EN_EVENTID */
+struct wmi_ring_en_event {
+	u8 ring_index;
 	u8 reserved[3];
 } __packed;