[RFC v4 00/18] ath10k high latency

[RFC v4 00/18] ath10k high latency

[Erik Stromdahl]

This is the fourth version of the high latency patches (stuff common for
usb and sdio).

Most of Kalles comments have been addressed, except the start_once patch
which is identical to the previous version. I need to investigate more
how this feature affects the case where the interface is brought up and
down several times.

The first two patches adds inline wrappers to the newly introduced htt
ops. I think these patches could have been submitted separately (as
PATCH and not RFC) but I decided to include them in this RFC series
instead.
Adding them separately would have reduced the size of the patchset
somewhat, but since the rest of the patches are depending on the first
two, I decided not to submit them separately.

I have tested USB support and the performance is similar to previous
versions.

Below are the results from iperf with a WUSB6100M:

192.168.1.190: WUSB6100M
192.168.1.244: other computer

Uplink test results (WUSB6100M -> other computer):

# iperf-client.sh 192.168.1.244
/usr/bin/iperf
------------------------------------------------------------
Client connecting to 192.168.1.244, TCP port 1234
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[  3] local 192.168.1.190 port 50524 connected with 192.168.1.244 port
1234
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.1 sec  10.8 MBytes  8.95 Mbits/sec

The result is not so good (I expect more from an 11ac device),
but hopefully it is configuration related.

Downlink test results (other computer -> WUSB6100M):

# iperf-server.sh
/usr/bin/iperf
------------------------------------------------------------
Server listening on TCP port 1234
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[  4] local 192.168.1.190 port 1234 connected with 192.168.1.244 port
44824
[  349.641149] usb 1-1: failed to transmit packet, dropping: -12
[  349.643246] usb 1-1: failed to submit frame: -12
[  349.643644] usb 1-1: failed to push frame: -12
[  349.663267] usb 1-1: failed to transmit packet, dropping: -12
[  349.664250] usb 1-1: failed to submit frame: -12
[  349.665405] usb 1-1: failed to push frame: -12
[  349.670244] usb 1-1: failed to transmit packet, dropping: -12
[  349.670907] usb 1-1: failed to submit frame: -12
[  349.671419] usb 1-1: failed to push frame: -12
[  349.671887] usb 1-1: failed to transmit packet, dropping: -12
[  350.703418] random: crng init done
[  354.877329] ath10k_warn: 10661 callbacks suppressed
[  354.877331] usb 1-1: failed to transmit packet, dropping: -12
[  354.879931] usb 1-1: failed to submit frame: -12
[  354.880307] usb 1-1: failed to push frame: -12
[  354.940557] usb 1-1: failed to transmit packet, dropping: -12
[  354.942516] usb 1-1: failed to submit frame: -12
[  354.943062] usb 1-1: failed to push frame: -12
[  355.134808] usb 1-1: failed to transmit packet, dropping: -12
[  355.136463] usb 1-1: failed to submit frame: -12
[  355.137425] usb 1-1: failed to push frame: -12
[  355.159841] usb 1-1: failed to transmit packet, dropping: -12
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.0 sec   225 MBytes   188 Mbits/sec

As you can see, there are a lot of ENOMEM errors in the TX path.
I think they could be related to patch 16 (that removes the pending
TX counter), but since I don't know how to configure the device
to generate HTT_T2H_MSG_TYPE_TX_COMPL_IND's the sw flow control had
to be disabled.

Since I no longer have access to any SDIO hardware I have not been able
to try the SDIO stuff, so it might be broken.

Erik Stromdahl (18):
  ath10k: add inlined wrappers for htt tx ops
  ath10k: add inlined wrappers for htt rx ops
  ath10k: add struct ath10k_bus_params
  ath10k: high_latency detection
  ath10k: add bus type check in ath10k_init_hw_params
  ath10k: per target config of max_num_peers
  ath10k: DMA related fixes for high latency devices
  ath10k: various fixes for high latency devices
  ath10k: add start_once support
  ath10k: add HTT TX HL ops
  ath10k: add HTT RX HL ops
  ath10k: htt: RX ring config HL support
  ath10k: htt: High latency TX support
  ath10k: htt: High latency RX support
  ath10k: wmi: disable softirq's while calling ieee80211_rx
  ath10k: remove htt pending TX count for high latency
  ath10k: add QCA9377 usb hw_param item
  ath10k: add QCA9377 sdio hw_param item

 drivers/net/wireless/ath/ath10k/ahb.c     |   9 +-
 drivers/net/wireless/ath/ath10k/core.c    | 108 ++++++++++++++++---
 drivers/net/wireless/ath/ath10k/core.h    |  19 ++--
 drivers/net/wireless/ath/ath10k/htc.c     |  19 ++--
 drivers/net/wireless/ath/ath10k/htt.c     |   4 +-
 drivers/net/wireless/ath/ath10k/htt.h     | 136 +++++++++++++++++++++++
 drivers/net/wireless/ath/ath10k/htt_rx.c  | 150 +++++++++++++++++++++++---
 drivers/net/wireless/ath/ath10k/htt_tx.c  | 173 ++++++++++++++++++++++++++++--
 drivers/net/wireless/ath/ath10k/hw.h      |  20 ++++
 drivers/net/wireless/ath/ath10k/mac.c     |   2 +-
 drivers/net/wireless/ath/ath10k/pci.c     |  13 +--
 drivers/net/wireless/ath/ath10k/rx_desc.h |  15 +++
 drivers/net/wireless/ath/ath10k/sdio.c    |   8 +-
 drivers/net/wireless/ath/ath10k/txrx.c    |   5 +-
 drivers/net/wireless/ath/ath10k/usb.c     |   7 +-
 drivers/net/wireless/ath/ath10k/wmi-tlv.c |   3 +-
 drivers/net/wireless/ath/ath10k/wmi.c     |   3 +-
 17 files changed, 622 insertions(+), 72 deletions(-)

-- 
2.15.1


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[RFC v4 01/18] ath10k: add inlined wrappers for htt tx ops

[Erik Stromdahl]

These wrappers makes the HTT ops align better with the HIF ops
(where similar wrappers are used).

It also makes it easier for a target to have unsupported ops
(by letting the corresponding function pointer be NULL).

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/htt.c    |  4 +--
 drivers/net/wireless/ath/ath10k/htt.h    | 51 ++++++++++++++++++++++++++++++++
 drivers/net/wireless/ath/ath10k/htt_tx.c | 12 ++++----
 drivers/net/wireless/ath/ath10k/mac.c    |  2 +-
 4 files changed, 60 insertions(+), 9 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/htt.c b/drivers/net/wireless/ath/ath10k/htt.c
index 625198dea18b..21a67f82f037 100644
--- a/drivers/net/wireless/ath/ath10k/htt.c
+++ b/drivers/net/wireless/ath/ath10k/htt.c
@@ -257,11 +257,11 @@ int ath10k_htt_setup(struct ath10k_htt *htt)
 		return status;
 	}
 
-	status = htt->tx_ops->htt_send_frag_desc_bank_cfg(htt);
+	status = ath10k_htt_send_frag_desc_bank_cfg(htt);
 	if (status)
 		return status;
 
-	status = htt->tx_ops->htt_send_rx_ring_cfg(htt);
+	status = ath10k_htt_send_rx_ring_cfg(htt);
 	if (status) {
 		ath10k_warn(ar, "failed to setup rx ring: %d\n",
 			    status);
diff --git a/drivers/net/wireless/ath/ath10k/htt.h b/drivers/net/wireless/ath/ath10k/htt.h
index 360c71b106d7..cdd87ef86c00 100644
--- a/drivers/net/wireless/ath/ath10k/htt.h
+++ b/drivers/net/wireless/ath/ath10k/htt.h
@@ -1848,6 +1848,57 @@ struct ath10k_htt_tx_ops {
 	void (*htt_free_txbuff)(struct ath10k_htt *htt);
 };
 
+static inline int ath10k_htt_send_rx_ring_cfg(struct ath10k_htt *htt)
+{
+	if (!htt->tx_ops->htt_send_rx_ring_cfg)
+		return -EOPNOTSUPP;
+
+	return htt->tx_ops->htt_send_rx_ring_cfg(htt);
+}
+
+static inline int ath10k_htt_send_frag_desc_bank_cfg(struct ath10k_htt *htt)
+{
+	if (!htt->tx_ops->htt_send_frag_desc_bank_cfg)
+		return -EOPNOTSUPP;
+
+	return htt->tx_ops->htt_send_frag_desc_bank_cfg(htt);
+}
+
+static inline int ath10k_htt_alloc_frag_desc(struct ath10k_htt *htt)
+{
+	if (!htt->tx_ops->htt_alloc_frag_desc)
+		return -EOPNOTSUPP;
+
+	return htt->tx_ops->htt_alloc_frag_desc(htt);
+}
+
+static inline void ath10k_htt_free_frag_desc(struct ath10k_htt *htt)
+{
+	if (htt->tx_ops->htt_free_frag_desc)
+		htt->tx_ops->htt_free_frag_desc(htt);
+}
+
+static inline int ath10k_htt_tx(struct ath10k_htt *htt,
+				enum ath10k_hw_txrx_mode txmode,
+				struct sk_buff *msdu)
+{
+	return htt->tx_ops->htt_tx(htt, txmode, msdu);
+}
+
+static inline int ath10k_htt_alloc_txbuff(struct ath10k_htt *htt)
+{
+	if (!htt->tx_ops->htt_alloc_txbuff)
+		return -EOPNOTSUPP;
+
+	return htt->tx_ops->htt_alloc_txbuff(htt);
+}
+
+static inline void ath10k_htt_free_txbuff(struct ath10k_htt *htt)
+{
+	if (htt->tx_ops->htt_free_txbuff)
+		htt->tx_ops->htt_free_txbuff(htt);
+}
+
 struct ath10k_htt_rx_ops {
 	size_t (*htt_get_rx_ring_size)(struct ath10k_htt *htt);
 	void (*htt_config_paddrs_ring)(struct ath10k_htt *htt, void *vaddr);
diff --git a/drivers/net/wireless/ath/ath10k/htt_tx.c b/drivers/net/wireless/ath/ath10k/htt_tx.c
index d334b7be1fea..a086958c39b6 100644
--- a/drivers/net/wireless/ath/ath10k/htt_tx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_tx.c
@@ -443,13 +443,13 @@ static int ath10k_htt_tx_alloc_buf(struct ath10k_htt *htt)
 	struct ath10k *ar = htt->ar;
 	int ret;
 
-	ret = htt->tx_ops->htt_alloc_txbuff(htt);
+	ret = ath10k_htt_alloc_txbuff(htt);
 	if (ret) {
 		ath10k_err(ar, "failed to alloc cont tx buffer: %d\n", ret);
 		return ret;
 	}
 
-	ret = htt->tx_ops->htt_alloc_frag_desc(htt);
+	ret = ath10k_htt_alloc_frag_desc(htt);
 	if (ret) {
 		ath10k_err(ar, "failed to alloc cont frag desc: %d\n", ret);
 		goto free_txbuf;
@@ -473,10 +473,10 @@ static int ath10k_htt_tx_alloc_buf(struct ath10k_htt *htt)
 	ath10k_htt_tx_free_txq(htt);
 
 free_frag_desc:
-	htt->tx_ops->htt_free_frag_desc(htt);
+	ath10k_htt_free_frag_desc(htt);
 
 free_txbuf:
-	htt->tx_ops->htt_free_txbuff(htt);
+	ath10k_htt_free_txbuff(htt);
 
 	return ret;
 }
@@ -530,9 +530,9 @@ void ath10k_htt_tx_destroy(struct ath10k_htt *htt)
 	if (!htt->tx_mem_allocated)
 		return;
 
-	htt->tx_ops->htt_free_txbuff(htt);
+	ath10k_htt_free_txbuff(htt);
 	ath10k_htt_tx_free_txq(htt);
-	htt->tx_ops->htt_free_frag_desc(htt);
+	ath10k_htt_free_frag_desc(htt);
 	ath10k_htt_tx_free_txdone_fifo(htt);
 	htt->tx_mem_allocated = false;
 }
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index ebb3f1b046f3..dcf6574f217c 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -3597,7 +3597,7 @@ static int ath10k_mac_tx_submit(struct ath10k *ar,
 
 	switch (txpath) {
 	case ATH10K_MAC_TX_HTT:
-		ret = htt->tx_ops->htt_tx(htt, txmode, skb);
+		ret = ath10k_htt_tx(htt, txmode, skb);
 		break;
 	case ATH10K_MAC_TX_HTT_MGMT:
 		ret = ath10k_htt_mgmt_tx(htt, skb);
-- 
2.15.1


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[RFC v4 02/18] ath10k: add inlined wrappers for htt rx ops

[Erik Stromdahl]

Added for the same reason as the TX wrappers.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/htt.h    | 38 ++++++++++++++++++++++++++++++++
 drivers/net/wireless/ath/ath10k/htt_rx.c | 14 ++++++------
 2 files changed, 45 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/htt.h b/drivers/net/wireless/ath/ath10k/htt.h
index cdd87ef86c00..3fa1be7749b2 100644
--- a/drivers/net/wireless/ath/ath10k/htt.h
+++ b/drivers/net/wireless/ath/ath10k/htt.h
@@ -1907,6 +1907,44 @@ struct ath10k_htt_rx_ops {
 	void* (*htt_get_vaddr_ring)(struct ath10k_htt *htt);
 	void (*htt_reset_paddrs_ring)(struct ath10k_htt *htt, int idx);
 };
+
+static inline size_t ath10k_htt_get_rx_ring_size(struct ath10k_htt *htt)
+{
+	if (!htt->rx_ops->htt_get_rx_ring_size)
+		return 0;
+
+	return htt->rx_ops->htt_get_rx_ring_size(htt);
+}
+
+static inline void ath10k_htt_config_paddrs_ring(struct ath10k_htt *htt,
+						 void *vaddr)
+{
+	if (htt->rx_ops->htt_config_paddrs_ring)
+		htt->rx_ops->htt_config_paddrs_ring(htt, vaddr);
+}
+
+static inline void ath10k_htt_set_paddrs_ring(struct ath10k_htt *htt,
+					      dma_addr_t paddr,
+					      int idx)
+{
+	if (htt->rx_ops->htt_set_paddrs_ring)
+		htt->rx_ops->htt_set_paddrs_ring(htt, paddr, idx);
+}
+
+static inline void *ath10k_htt_get_vaddr_ring(struct ath10k_htt *htt)
+{
+	if (!htt->rx_ops->htt_get_vaddr_ring)
+		return NULL;
+
+	return htt->rx_ops->htt_get_vaddr_ring(htt);
+}
+
+static inline void ath10k_htt_reset_paddrs_ring(struct ath10k_htt *htt, int idx)
+{
+	if (htt->rx_ops->htt_reset_paddrs_ring)
+		htt->rx_ops->htt_reset_paddrs_ring(htt, idx);
+}
+
 #define RX_HTT_HDR_STATUS_LEN 64
 
 /* This structure layout is programmed via rx ring setup
diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c
index 6d96f9560950..7b3d6bf015c7 100644
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -180,7 +180,7 @@ static int __ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
 		rxcb = ATH10K_SKB_RXCB(skb);
 		rxcb->paddr = paddr;
 		htt->rx_ring.netbufs_ring[idx] = skb;
-		htt->rx_ops->htt_set_paddrs_ring(htt, paddr, idx);
+		ath10k_htt_set_paddrs_ring(htt, paddr, idx);
 		htt->rx_ring.fill_cnt++;
 
 		if (htt->rx_ring.in_ord_rx) {
@@ -285,8 +285,8 @@ void ath10k_htt_rx_free(struct ath10k_htt *htt)
 	ath10k_htt_rx_ring_free(htt);
 
 	dma_free_coherent(htt->ar->dev,
-			  htt->rx_ops->htt_get_rx_ring_size(htt),
-			  htt->rx_ops->htt_get_vaddr_ring(htt),
+			  ath10k_htt_get_rx_ring_size(htt),
+			  ath10k_htt_get_vaddr_ring(htt),
 			  htt->rx_ring.base_paddr);
 
 	dma_free_coherent(htt->ar->dev,
@@ -313,7 +313,7 @@ static inline struct sk_buff *ath10k_htt_rx_netbuf_pop(struct ath10k_htt *htt)
 	idx = htt->rx_ring.sw_rd_idx.msdu_payld;
 	msdu = htt->rx_ring.netbufs_ring[idx];
 	htt->rx_ring.netbufs_ring[idx] = NULL;
-	htt->rx_ops->htt_reset_paddrs_ring(htt, idx);
+	ath10k_htt_reset_paddrs_ring(htt, idx);
 
 	idx++;
 	idx &= htt->rx_ring.size_mask;
@@ -585,13 +585,13 @@ int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
 	if (!htt->rx_ring.netbufs_ring)
 		goto err_netbuf;
 
-	size = htt->rx_ops->htt_get_rx_ring_size(htt);
+	size = ath10k_htt_get_rx_ring_size(htt);
 
 	vaddr_ring = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_KERNEL);
 	if (!vaddr_ring)
 		goto err_dma_ring;
 
-	htt->rx_ops->htt_config_paddrs_ring(htt, vaddr_ring);
+	ath10k_htt_config_paddrs_ring(htt, vaddr_ring);
 	htt->rx_ring.base_paddr = paddr;
 
 	vaddr = dma_alloc_coherent(htt->ar->dev,
@@ -625,7 +625,7 @@ int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
 
 err_dma_idx:
 	dma_free_coherent(htt->ar->dev,
-			  htt->rx_ops->htt_get_rx_ring_size(htt),
+			  ath10k_htt_get_rx_ring_size(htt),
 			  vaddr_ring,
 			  htt->rx_ring.base_paddr);
 err_dma_ring:
-- 
2.15.1


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[RFC v4 03/18] ath10k: add struct ath10k_bus_params

[Erik Stromdahl]

This struct is used as argument to ath10k_core_register in order to
make it easier to add more bus parameters in the future.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/ahb.c  |  8 ++++----
 drivers/net/wireless/ath/ath10k/core.c |  5 +++--
 drivers/net/wireless/ath/ath10k/core.h |  7 ++++++-
 drivers/net/wireless/ath/ath10k/pci.c  | 12 ++++++------
 drivers/net/wireless/ath/ath10k/sdio.c |  7 ++++---
 drivers/net/wireless/ath/ath10k/usb.c  |  6 +++---
 6 files changed, 26 insertions(+), 19 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/ahb.c b/drivers/net/wireless/ath/ath10k/ahb.c
index 35d10490f6c3..6f902f355fca 100644
--- a/drivers/net/wireless/ath/ath10k/ahb.c
+++ b/drivers/net/wireless/ath/ath10k/ahb.c
@@ -758,7 +758,7 @@ static int ath10k_ahb_probe(struct platform_device *pdev)
 	enum ath10k_hw_rev hw_rev;
 	size_t size;
 	int ret;
-	u32 chip_id;
+	struct ath10k_bus_params bus_params;
 
 	of_id = of_match_device(ath10k_ahb_of_match, &pdev->dev);
 	if (!of_id) {
@@ -814,14 +814,14 @@ static int ath10k_ahb_probe(struct platform_device *pdev)
 
 	ath10k_pci_ce_deinit(ar);
 
-	chip_id = ath10k_ahb_soc_read32(ar, SOC_CHIP_ID_ADDRESS);
-	if (chip_id == 0xffffffff) {
+	bus_params.chip_id = ath10k_ahb_soc_read32(ar, SOC_CHIP_ID_ADDRESS);
+	if (bus_params.chip_id == 0xffffffff) {
 		ath10k_err(ar, "failed to get chip id\n");
 		ret = -ENODEV;
 		goto err_halt_device;
 	}
 
-	ret = ath10k_core_register(ar, chip_id);
+	ret = ath10k_core_register(ar, &bus_params);
 	if (ret) {
 		ath10k_err(ar, "failed to register driver core: %d\n", ret);
 		goto err_halt_device;
diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index fe9341c97f31..3440ccc45d60 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -2609,9 +2609,10 @@ static void ath10k_core_register_work(struct work_struct *work)
 	return;
 }
 
-int ath10k_core_register(struct ath10k *ar, u32 chip_id)
+int ath10k_core_register(struct ath10k *ar,
+			 const struct ath10k_bus_params *bus_params)
 {
-	ar->chip_id = chip_id;
+	ar->chip_id = bus_params->chip_id;
 	queue_work(ar->workqueue, &ar->register_work);
 
 	return 0;
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index fe6b30356d3b..f2e851d91170 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -769,6 +769,10 @@ struct ath10k_per_peer_tx_stats {
 	u32	reserved2;
 };
 
+struct ath10k_bus_params {
+	u32 chip_id;
+};
+
 struct ath10k {
 	struct ath_common ath_common;
 	struct ieee80211_hw *hw;
@@ -1049,7 +1053,8 @@ int ath10k_core_start(struct ath10k *ar, enum ath10k_firmware_mode mode,
 		      const struct ath10k_fw_components *fw_components);
 int ath10k_wait_for_suspend(struct ath10k *ar, u32 suspend_opt);
 void ath10k_core_stop(struct ath10k *ar);
-int ath10k_core_register(struct ath10k *ar, u32 chip_id);
+int ath10k_core_register(struct ath10k *ar,
+			 const struct ath10k_bus_params *bus_params);
 void ath10k_core_unregister(struct ath10k *ar);
 
 #endif /* _CORE_H_ */
diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c
index 8abaccc25227..124443d45873 100644
--- a/drivers/net/wireless/ath/ath10k/pci.c
+++ b/drivers/net/wireless/ath/ath10k/pci.c
@@ -3420,7 +3420,7 @@ static int ath10k_pci_probe(struct pci_dev *pdev,
 	struct ath10k *ar;
 	struct ath10k_pci *ar_pci;
 	enum ath10k_hw_rev hw_rev;
-	u32 chip_id;
+	struct ath10k_bus_params bus_params;
 	bool pci_ps;
 	int (*pci_soft_reset)(struct ath10k *ar);
 	int (*pci_hard_reset)(struct ath10k *ar);
@@ -3555,19 +3555,19 @@ static int ath10k_pci_probe(struct pci_dev *pdev,
 		goto err_free_irq;
 	}
 
-	chip_id = ath10k_pci_soc_read32(ar, SOC_CHIP_ID_ADDRESS);
-	if (chip_id == 0xffffffff) {
+	bus_params.chip_id = ath10k_pci_soc_read32(ar, SOC_CHIP_ID_ADDRESS);
+	if (bus_params.chip_id == 0xffffffff) {
 		ath10k_err(ar, "failed to get chip id\n");
 		goto err_free_irq;
 	}
 
-	if (!ath10k_pci_chip_is_supported(pdev->device, chip_id)) {
+	if (!ath10k_pci_chip_is_supported(pdev->device, bus_params.chip_id)) {
 		ath10k_err(ar, "device %04x with chip_id %08x isn't supported\n",
-			   pdev->device, chip_id);
+			   pdev->device, bus_params.chip_id);
 		goto err_free_irq;
 	}
 
-	ret = ath10k_core_register(ar, chip_id);
+	ret = ath10k_core_register(ar, &bus_params);
 	if (ret) {
 		ath10k_err(ar, "failed to register driver core: %d\n", ret);
 		goto err_free_irq;
diff --git a/drivers/net/wireless/ath/ath10k/sdio.c b/drivers/net/wireless/ath/ath10k/sdio.c
index 03a69e5b1116..03dc748317f8 100644
--- a/drivers/net/wireless/ath/ath10k/sdio.c
+++ b/drivers/net/wireless/ath/ath10k/sdio.c
@@ -1931,7 +1931,8 @@ static int ath10k_sdio_probe(struct sdio_func *func,
 	struct ath10k_sdio *ar_sdio;
 	struct ath10k *ar;
 	enum ath10k_hw_rev hw_rev;
-	u32 chip_id, dev_id_base;
+	u32 dev_id_base;
+	struct ath10k_bus_params bus_params;
 	int ret, i;
 
 	/* Assumption: All SDIO based chipsets (so far) are QCA6174 based.
@@ -2026,8 +2027,8 @@ static int ath10k_sdio_probe(struct sdio_func *func,
 	}
 
 	/* TODO: don't know yet how to get chip_id with SDIO */
-	chip_id = 0;
-	ret = ath10k_core_register(ar, chip_id);
+	bus_params.chip_id = 0;
+	ret = ath10k_core_register(ar, &bus_params);
 	if (ret) {
 		ath10k_err(ar, "failed to register driver core: %d\n", ret);
 		goto err_free_wq;
diff --git a/drivers/net/wireless/ath/ath10k/usb.c b/drivers/net/wireless/ath/ath10k/usb.c
index d4803ff5a78a..275e00bafcb1 100644
--- a/drivers/net/wireless/ath/ath10k/usb.c
+++ b/drivers/net/wireless/ath/ath10k/usb.c
@@ -983,7 +983,7 @@ static int ath10k_usb_probe(struct usb_interface *interface,
 	struct usb_device *dev = interface_to_usbdev(interface);
 	int ret, vendor_id, product_id;
 	enum ath10k_hw_rev hw_rev;
-	u32 chip_id;
+	struct ath10k_bus_params bus_params;
 
 	/* Assumption: All USB based chipsets (so far) are QCA9377 based.
 	 * If there will be newer chipsets that does not use the hw reg
@@ -1017,8 +1017,8 @@ static int ath10k_usb_probe(struct usb_interface *interface,
 	ar->id.device = product_id;
 
 	/* TODO: don't know yet how to get chip_id with USB */
-	chip_id = 0;
-	ret = ath10k_core_register(ar, chip_id);
+	bus_params.chip_id = 0;
+	ret = ath10k_core_register(ar, &bus_params);
 	if (ret) {
 		ath10k_warn(ar, "failed to register driver core: %d\n", ret);
 		goto err;
-- 
2.15.1


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http://lists.infradead.org/mailman/listinfo/ath10k

[RFC v4 04/18] ath10k: high_latency detection

[Erik Stromdahl]

Add is_high_latency parameter to struct ath10k_bus_params.

The setup of high latency chips is sometimes different than
for chips using low latency interfaces.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/ahb.c  | 1 +
 drivers/net/wireless/ath/ath10k/core.c | 1 +
 drivers/net/wireless/ath/ath10k/core.h | 2 ++
 drivers/net/wireless/ath/ath10k/pci.c  | 1 +
 drivers/net/wireless/ath/ath10k/sdio.c | 1 +
 drivers/net/wireless/ath/ath10k/usb.c  | 1 +
 6 files changed, 7 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/ahb.c b/drivers/net/wireless/ath/ath10k/ahb.c
index 6f902f355fca..b342f3393e2c 100644
--- a/drivers/net/wireless/ath/ath10k/ahb.c
+++ b/drivers/net/wireless/ath/ath10k/ahb.c
@@ -814,6 +814,7 @@ static int ath10k_ahb_probe(struct platform_device *pdev)
 
 	ath10k_pci_ce_deinit(ar);
 
+	bus_params.is_high_latency = false;
 	bus_params.chip_id = ath10k_ahb_soc_read32(ar, SOC_CHIP_ID_ADDRESS);
 	if (bus_params.chip_id == 0xffffffff) {
 		ath10k_err(ar, "failed to get chip id\n");
diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 3440ccc45d60..09b6ad481414 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -2613,6 +2613,7 @@ int ath10k_core_register(struct ath10k *ar,
 			 const struct ath10k_bus_params *bus_params)
 {
 	ar->chip_id = bus_params->chip_id;
+	ar->is_high_latency = bus_params->is_high_latency;
 	queue_work(ar->workqueue, &ar->register_work);
 
 	return 0;
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index f2e851d91170..17827ce3752d 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -771,6 +771,7 @@ struct ath10k_per_peer_tx_stats {
 
 struct ath10k_bus_params {
 	u32 chip_id;
+	bool is_high_latency;
 };
 
 struct ath10k {
@@ -783,6 +784,7 @@ struct ath10k {
 	enum ath10k_hw_rev hw_rev;
 	u16 dev_id;
 	u32 chip_id;
+	bool is_high_latency;
 	u32 target_version;
 	u8 fw_version_major;
 	u32 fw_version_minor;
diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c
index 124443d45873..9fd8f1576f0c 100644
--- a/drivers/net/wireless/ath/ath10k/pci.c
+++ b/drivers/net/wireless/ath/ath10k/pci.c
@@ -3555,6 +3555,7 @@ static int ath10k_pci_probe(struct pci_dev *pdev,
 		goto err_free_irq;
 	}
 
+	bus_params.is_high_latency = false;
 	bus_params.chip_id = ath10k_pci_soc_read32(ar, SOC_CHIP_ID_ADDRESS);
 	if (bus_params.chip_id == 0xffffffff) {
 		ath10k_err(ar, "failed to get chip id\n");
diff --git a/drivers/net/wireless/ath/ath10k/sdio.c b/drivers/net/wireless/ath/ath10k/sdio.c
index 03dc748317f8..f0f1b2b8c7a7 100644
--- a/drivers/net/wireless/ath/ath10k/sdio.c
+++ b/drivers/net/wireless/ath/ath10k/sdio.c
@@ -2026,6 +2026,7 @@ static int ath10k_sdio_probe(struct sdio_func *func,
 		goto err_free_wq;
 	}
 
+	bus_params.is_high_latency = true;
 	/* TODO: don't know yet how to get chip_id with SDIO */
 	bus_params.chip_id = 0;
 	ret = ath10k_core_register(ar, &bus_params);
diff --git a/drivers/net/wireless/ath/ath10k/usb.c b/drivers/net/wireless/ath/ath10k/usb.c
index 275e00bafcb1..3b330e9607aa 100644
--- a/drivers/net/wireless/ath/ath10k/usb.c
+++ b/drivers/net/wireless/ath/ath10k/usb.c
@@ -1016,6 +1016,7 @@ static int ath10k_usb_probe(struct usb_interface *interface,
 	ar->id.vendor = vendor_id;
 	ar->id.device = product_id;
 
+	bus_params.is_high_latency = true;
 	/* TODO: don't know yet how to get chip_id with USB */
 	bus_params.chip_id = 0;
 	ret = ath10k_core_register(ar, &bus_params);
-- 
2.15.1


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http://lists.infradead.org/mailman/listinfo/ath10k

[RFC v4 05/18] ath10k: add bus type check in ath10k_init_hw_params

[Erik Stromdahl]

The bus type is used together with the other hw parameters
to find a matching entry in ath10k_hw_params_list for the device.

This is necessary since HL devices can have the same dev_id and
target_version as a corresponding LL device (same chipset) and
yet use a totally different configuration.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/core.c | 16 +++++++++++++++-
 drivers/net/wireless/ath/ath10k/core.h |  8 --------
 drivers/net/wireless/ath/ath10k/hw.h   |  9 +++++++++
 3 files changed, 24 insertions(+), 9 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 09b6ad481414..41e6b5a08885 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -64,6 +64,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 	{
 		.id = QCA988X_HW_2_0_VERSION,
 		.dev_id = QCA988X_2_0_DEVICE_ID,
+		.bus = ATH10K_BUS_PCI,
 		.name = "qca988x hw2.0",
 		.patch_load_addr = QCA988X_HW_2_0_PATCH_LOAD_ADDR,
 		.uart_pin = 7,
@@ -93,6 +94,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 	{
 		.id = QCA9887_HW_1_0_VERSION,
 		.dev_id = QCA9887_1_0_DEVICE_ID,
+		.bus = ATH10K_BUS_PCI,
 		.name = "qca9887 hw1.0",
 		.patch_load_addr = QCA9887_HW_1_0_PATCH_LOAD_ADDR,
 		.uart_pin = 7,
@@ -122,6 +124,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 	{
 		.id = QCA6174_HW_2_1_VERSION,
 		.dev_id = QCA6164_2_1_DEVICE_ID,
+		.bus = ATH10K_BUS_PCI,
 		.name = "qca6164 hw2.1",
 		.patch_load_addr = QCA6174_HW_2_1_PATCH_LOAD_ADDR,
 		.uart_pin = 6,
@@ -150,6 +153,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 	{
 		.id = QCA6174_HW_2_1_VERSION,
 		.dev_id = QCA6174_2_1_DEVICE_ID,
+		.bus = ATH10K_BUS_PCI,
 		.name = "qca6174 hw2.1",
 		.patch_load_addr = QCA6174_HW_2_1_PATCH_LOAD_ADDR,
 		.uart_pin = 6,
@@ -178,6 +182,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 	{
 		.id = QCA6174_HW_3_0_VERSION,
 		.dev_id = QCA6174_2_1_DEVICE_ID,
+		.bus = ATH10K_BUS_PCI,
 		.name = "qca6174 hw3.0",
 		.patch_load_addr = QCA6174_HW_3_0_PATCH_LOAD_ADDR,
 		.uart_pin = 6,
@@ -206,6 +211,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 	{
 		.id = QCA6174_HW_3_2_VERSION,
 		.dev_id = QCA6174_2_1_DEVICE_ID,
+		.bus = ATH10K_BUS_PCI,
 		.name = "qca6174 hw3.2",
 		.patch_load_addr = QCA6174_HW_3_0_PATCH_LOAD_ADDR,
 		.uart_pin = 6,
@@ -237,6 +243,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 	{
 		.id = QCA99X0_HW_2_0_DEV_VERSION,
 		.dev_id = QCA99X0_2_0_DEVICE_ID,
+		.bus = ATH10K_BUS_PCI,
 		.name = "qca99x0 hw2.0",
 		.patch_load_addr = QCA99X0_HW_2_0_PATCH_LOAD_ADDR,
 		.uart_pin = 7,
@@ -271,6 +278,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 	{
 		.id = QCA9984_HW_1_0_DEV_VERSION,
 		.dev_id = QCA9984_1_0_DEVICE_ID,
+		.bus = ATH10K_BUS_PCI,
 		.name = "qca9984/qca9994 hw1.0",
 		.patch_load_addr = QCA9984_HW_1_0_PATCH_LOAD_ADDR,
 		.uart_pin = 7,
@@ -310,6 +318,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 	{
 		.id = QCA9888_HW_2_0_DEV_VERSION,
 		.dev_id = QCA9888_2_0_DEVICE_ID,
+		.bus = ATH10K_BUS_PCI,
 		.name = "qca9888 hw2.0",
 		.patch_load_addr = QCA9888_HW_2_0_PATCH_LOAD_ADDR,
 		.uart_pin = 7,
@@ -348,6 +357,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 	{
 		.id = QCA9377_HW_1_0_DEV_VERSION,
 		.dev_id = QCA9377_1_0_DEVICE_ID,
+		.bus = ATH10K_BUS_PCI,
 		.name = "qca9377 hw1.0",
 		.patch_load_addr = QCA9377_HW_1_0_PATCH_LOAD_ADDR,
 		.uart_pin = 6,
@@ -376,6 +386,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 	{
 		.id = QCA9377_HW_1_1_DEV_VERSION,
 		.dev_id = QCA9377_1_0_DEVICE_ID,
+		.bus = ATH10K_BUS_PCI,
 		.name = "qca9377 hw1.1",
 		.patch_load_addr = QCA9377_HW_1_0_PATCH_LOAD_ADDR,
 		.uart_pin = 6,
@@ -406,6 +417,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 	{
 		.id = QCA4019_HW_1_0_DEV_VERSION,
 		.dev_id = 0,
+		.bus = ATH10K_BUS_AHB,
 		.name = "qca4019 hw1.0",
 		.patch_load_addr = QCA4019_HW_1_0_PATCH_LOAD_ADDR,
 		.uart_pin = 7,
@@ -441,6 +453,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 	{
 		.id = WCN3990_HW_1_0_DEV_VERSION,
 		.dev_id = 0,
+		.bus = ATH10K_BUS_PCI,
 		.name = "wcn3990 hw1.0",
 		.continuous_frag_desc = true,
 		.tx_chain_mask = 0x7,
@@ -1790,7 +1803,8 @@ static int ath10k_init_hw_params(struct ath10k *ar)
 	for (i = 0; i < ARRAY_SIZE(ath10k_hw_params_list); i++) {
 		hw_params = &ath10k_hw_params_list[i];
 
-		if (hw_params->id == ar->target_version &&
+		if (hw_params->bus == ar->hif.bus &&
+		    hw_params->id == ar->target_version &&
 		    hw_params->dev_id == ar->dev_id)
 			break;
 	}
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index 17827ce3752d..32cfa14d3053 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -87,14 +87,6 @@
 
 struct ath10k;
 
-enum ath10k_bus {
-	ATH10K_BUS_PCI,
-	ATH10K_BUS_AHB,
-	ATH10K_BUS_SDIO,
-	ATH10K_BUS_USB,
-	ATH10K_BUS_SNOC,
-};
-
 static inline const char *ath10k_bus_str(enum ath10k_bus bus)
 {
 	switch (bus) {
diff --git a/drivers/net/wireless/ath/ath10k/hw.h b/drivers/net/wireless/ath/ath10k/hw.h
index 6203bc65799b..3043fd17942e 100644
--- a/drivers/net/wireless/ath/ath10k/hw.h
+++ b/drivers/net/wireless/ath/ath10k/hw.h
@@ -20,6 +20,14 @@
 
 #include "targaddrs.h"
 
+enum ath10k_bus {
+	ATH10K_BUS_PCI,
+	ATH10K_BUS_AHB,
+	ATH10K_BUS_SDIO,
+	ATH10K_BUS_USB,
+	ATH10K_BUS_SNOC,
+};
+
 #define ATH10K_FW_DIR			"ath10k"
 
 #define QCA988X_2_0_DEVICE_ID   (0x003c)
@@ -491,6 +499,7 @@ struct ath10k_hw_clk_params {
 struct ath10k_hw_params {
 	u32 id;
 	u16 dev_id;
+	enum ath10k_bus bus;
 	const char *name;
 	u32 patch_load_addr;
 	int uart_pin;
-- 
2.15.1


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[RFC v4 06/18] ath10k: per target config of max_num_peers

[Erik Stromdahl]

This patch makes sure the value of max_num_peers matches
num_peers in hw_params (if set to a non zero value).

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/core.c    | 17 ++++++++++++-----
 drivers/net/wireless/ath/ath10k/hw.h      |  3 +++
 drivers/net/wireless/ath/ath10k/wmi-tlv.c |  3 +--
 3 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 41e6b5a08885..4e849ec924c6 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -1905,6 +1905,7 @@ static void ath10k_core_set_coverage_class_work(struct work_struct *work)
 static int ath10k_core_init_firmware_features(struct ath10k *ar)
 {
 	struct ath10k_fw_file *fw_file = &ar->normal_mode_fw.fw_file;
+	int max_num_peers;
 
 	if (test_bit(ATH10K_FW_FEATURE_WMI_10_2, fw_file->fw_features) &&
 	    !test_bit(ATH10K_FW_FEATURE_WMI_10X, fw_file->fw_features)) {
@@ -1984,7 +1985,7 @@ static int ath10k_core_init_firmware_features(struct ath10k *ar)
 
 	switch (fw_file->wmi_op_version) {
 	case ATH10K_FW_WMI_OP_VERSION_MAIN:
-		ar->max_num_peers = TARGET_NUM_PEERS;
+		max_num_peers = TARGET_NUM_PEERS;
 		ar->max_num_stations = TARGET_NUM_STATIONS;
 		ar->max_num_vdevs = TARGET_NUM_VDEVS;
 		ar->htt.max_num_pending_tx = TARGET_NUM_MSDU_DESC;
@@ -1996,10 +1997,10 @@ static int ath10k_core_init_firmware_features(struct ath10k *ar)
 	case ATH10K_FW_WMI_OP_VERSION_10_2:
 	case ATH10K_FW_WMI_OP_VERSION_10_2_4:
 		if (ath10k_peer_stats_enabled(ar)) {
-			ar->max_num_peers = TARGET_10X_TX_STATS_NUM_PEERS;
+			max_num_peers = TARGET_10X_TX_STATS_NUM_PEERS;
 			ar->max_num_stations = TARGET_10X_TX_STATS_NUM_STATIONS;
 		} else {
-			ar->max_num_peers = TARGET_10X_NUM_PEERS;
+			max_num_peers = TARGET_10X_NUM_PEERS;
 			ar->max_num_stations = TARGET_10X_NUM_STATIONS;
 		}
 		ar->max_num_vdevs = TARGET_10X_NUM_VDEVS;
@@ -2008,7 +2009,7 @@ static int ath10k_core_init_firmware_features(struct ath10k *ar)
 		ar->max_spatial_stream = WMI_MAX_SPATIAL_STREAM;
 		break;
 	case ATH10K_FW_WMI_OP_VERSION_TLV:
-		ar->max_num_peers = TARGET_TLV_NUM_PEERS;
+		max_num_peers = TARGET_TLV_NUM_PEERS;
 		ar->max_num_stations = TARGET_TLV_NUM_STATIONS;
 		ar->max_num_vdevs = TARGET_TLV_NUM_VDEVS;
 		ar->max_num_tdls_vdevs = TARGET_TLV_NUM_TDLS_VDEVS;
@@ -2019,7 +2020,7 @@ static int ath10k_core_init_firmware_features(struct ath10k *ar)
 		ar->max_spatial_stream = WMI_MAX_SPATIAL_STREAM;
 		break;
 	case ATH10K_FW_WMI_OP_VERSION_10_4:
-		ar->max_num_peers = TARGET_10_4_NUM_PEERS;
+		max_num_peers = TARGET_10_4_NUM_PEERS;
 		ar->max_num_stations = TARGET_10_4_NUM_STATIONS;
 		ar->num_active_peers = TARGET_10_4_ACTIVE_PEERS;
 		ar->max_num_vdevs = TARGET_10_4_NUM_VDEVS;
@@ -2037,10 +2038,16 @@ static int ath10k_core_init_firmware_features(struct ath10k *ar)
 		break;
 	case ATH10K_FW_WMI_OP_VERSION_UNSET:
 	case ATH10K_FW_WMI_OP_VERSION_MAX:
+	default:
 		WARN_ON(1);
 		return -EINVAL;
 	}
 
+	if (ar->hw_params.num_peers)
+		ar->max_num_peers = ar->hw_params.num_peers;
+	else
+		ar->max_num_peers = max_num_peers;
+
 	/* Backwards compatibility for firmwares without
 	 * ATH10K_FW_IE_HTT_OP_VERSION.
 	 */
diff --git a/drivers/net/wireless/ath/ath10k/hw.h b/drivers/net/wireless/ath/ath10k/hw.h
index 3043fd17942e..53276950c95c 100644
--- a/drivers/net/wireless/ath/ath10k/hw.h
+++ b/drivers/net/wireless/ath/ath10k/hw.h
@@ -692,6 +692,9 @@ ath10k_rx_desc_get_l3_pad_bytes(struct ath10k_hw_params *hw,
 #define TARGET_HL_10_TLV_AST_SKID_LIMIT		6
 #define TARGET_HL_10_TLV_NUM_WDS_ENTRIES	2
 
+/* Target specific defines for QCA9377 high latency firmware */
+#define TARGET_QCA9377_HL_NUM_PEERS		15
+
 /* Diagnostic Window */
 #define CE_DIAG_PIPE	7
 
diff --git a/drivers/net/wireless/ath/ath10k/wmi-tlv.c b/drivers/net/wireless/ath/ath10k/wmi-tlv.c
index ae77a007ae07..6b58bcbb36c1 100644
--- a/drivers/net/wireless/ath/ath10k/wmi-tlv.c
+++ b/drivers/net/wireless/ath/ath10k/wmi-tlv.c
@@ -1439,7 +1439,6 @@ static struct sk_buff *ath10k_wmi_tlv_op_gen_init(struct ath10k *ar)
 	cmd->num_host_mem_chunks = __cpu_to_le32(ar->wmi.num_mem_chunks);
 
 	cfg->num_vdevs = __cpu_to_le32(TARGET_TLV_NUM_VDEVS);
-
 	cfg->num_peers = __cpu_to_le32(ar->hw_params.num_peers);
 	cfg->ast_skid_limit = __cpu_to_le32(ar->hw_params.ast_skid_limit);
 	cfg->num_wds_entries = __cpu_to_le32(ar->hw_params.num_wds_entries);
@@ -1453,7 +1452,7 @@ static struct sk_buff *ath10k_wmi_tlv_op_gen_init(struct ath10k *ar)
 	}
 
 	cfg->num_peer_keys = __cpu_to_le32(2);
-	cfg->num_tids = __cpu_to_le32(TARGET_TLV_NUM_TIDS);
+	cfg->num_tids = __cpu_to_le32(ar->hw_params.num_peers * 2);
 	cfg->tx_chain_mask = __cpu_to_le32(0x7);
 	cfg->rx_chain_mask = __cpu_to_le32(0x7);
 	cfg->rx_timeout_pri[0] = __cpu_to_le32(0x64);
-- 
2.15.1


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[RFC v4 07/18] ath10k: DMA related fixes for high latency devices

[Erik Stromdahl]

Several DMA related functions (such as the dma_map_xxx functions)
are not used with high latency devices and don't need to be invoked
in this case.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/htc.c    | 19 ++++++++++++-------
 drivers/net/wireless/ath/ath10k/htt_tx.c |  3 ++-
 drivers/net/wireless/ath/ath10k/txrx.c   |  3 ++-
 3 files changed, 16 insertions(+), 9 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/htc.c b/drivers/net/wireless/ath/ath10k/htc.c
index 492dc5b4bbf2..dd69345f911e 100644
--- a/drivers/net/wireless/ath/ath10k/htc.c
+++ b/drivers/net/wireless/ath/ath10k/htc.c
@@ -53,7 +53,8 @@ static inline void ath10k_htc_restore_tx_skb(struct ath10k_htc *htc,
 {
 	struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
 
-	dma_unmap_single(htc->ar->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
+	if (!htc->ar->is_high_latency)
+		dma_unmap_single(htc->ar->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
 	skb_pull(skb, sizeof(struct ath10k_htc_hdr));
 }
 
@@ -137,11 +138,14 @@ int ath10k_htc_send(struct ath10k_htc *htc,
 	ath10k_htc_prepare_tx_skb(ep, skb);
 
 	skb_cb->eid = eid;
-	skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE);
-	ret = dma_mapping_error(dev, skb_cb->paddr);
-	if (ret) {
-		ret = -EIO;
-		goto err_credits;
+	if (!ar->is_high_latency) {
+		skb_cb->paddr = dma_map_single(dev, skb->data, skb->len,
+					       DMA_TO_DEVICE);
+		ret = dma_mapping_error(dev, skb_cb->paddr);
+		if (ret) {
+			ret = -EIO;
+			goto err_credits;
+		}
 	}
 
 	sg_item.transfer_id = ep->eid;
@@ -157,7 +161,8 @@ int ath10k_htc_send(struct ath10k_htc *htc,
 	return 0;
 
 err_unmap:
-	dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
+	if (!ar->is_high_latency)
+		dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
 err_credits:
 	if (ep->tx_credit_flow_enabled) {
 		spin_lock_bh(&htc->tx_lock);
diff --git a/drivers/net/wireless/ath/ath10k/htt_tx.c b/drivers/net/wireless/ath/ath10k/htt_tx.c
index a086958c39b6..4d0bfb47d162 100644
--- a/drivers/net/wireless/ath/ath10k/htt_tx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_tx.c
@@ -1125,7 +1125,8 @@ int ath10k_htt_mgmt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
 	return 0;
 
 err_unmap_msdu:
-	dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
+	if (!ar->is_high_latency)
+		dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
 err_free_txdesc:
 	dev_kfree_skb_any(txdesc);
 err_free_msdu_id:
diff --git a/drivers/net/wireless/ath/ath10k/txrx.c b/drivers/net/wireless/ath/ath10k/txrx.c
index 5b3b021526ab..febc3eb93fbd 100644
--- a/drivers/net/wireless/ath/ath10k/txrx.c
+++ b/drivers/net/wireless/ath/ath10k/txrx.c
@@ -94,7 +94,8 @@ int ath10k_txrx_tx_unref(struct ath10k_htt *htt,
 		wake_up(&htt->empty_tx_wq);
 	spin_unlock_bh(&htt->tx_lock);
 
-	dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
+	if (!ar->is_high_latency)
+		dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
 
 	ath10k_report_offchan_tx(htt->ar, msdu);
 
-- 
2.15.1


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http://lists.infradead.org/mailman/listinfo/ath10k

[RFC v4 08/18] ath10k: various fixes for high latency devices

[Erik Stromdahl]

A few execution paths are not applicable for high latency
devices and can be skipped.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/htt_rx.c | 3 ++-
 drivers/net/wireless/ath/ath10k/txrx.c   | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c
index 7b3d6bf015c7..1432d5b3e9d3 100644
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -2686,7 +2686,8 @@ bool ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
 		break;
 	}
 	case HTT_T2H_MSG_TYPE_TX_COMPL_IND:
-		ath10k_htt_rx_tx_compl_ind(htt->ar, skb);
+		if (!ar->is_high_latency)
+			ath10k_htt_rx_tx_compl_ind(htt->ar, skb);
 		break;
 	case HTT_T2H_MSG_TYPE_SEC_IND: {
 		struct ath10k *ar = htt->ar;
diff --git a/drivers/net/wireless/ath/ath10k/txrx.c b/drivers/net/wireless/ath/ath10k/txrx.c
index febc3eb93fbd..a151abe5e97b 100644
--- a/drivers/net/wireless/ath/ath10k/txrx.c
+++ b/drivers/net/wireless/ath/ath10k/txrx.c
@@ -90,7 +90,7 @@ int ath10k_txrx_tx_unref(struct ath10k_htt *htt,
 
 	ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id);
 	ath10k_htt_tx_dec_pending(htt);
-	if (htt->num_pending_tx == 0)
+	if (!ar->is_high_latency && (htt->num_pending_tx == 0))
 		wake_up(&htt->empty_tx_wq);
 	spin_unlock_bh(&htt->tx_lock);
 
-- 
2.15.1


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[RFC v4 09/18] ath10k: add start_once support

[Erik Stromdahl]

Add possibility to configure the driver to only start target once.
This can reduce startup time of SDIO devices significantly since
loading the firmware can take a substantial amount of time.

The patch is also necessary for high latency devices in general
since it does not seem to be possible to rerun the BMI phase
(fw upload) without power-cycling the device.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/core.c | 19 +++++++++++++++----
 drivers/net/wireless/ath/ath10k/core.h |  2 ++
 drivers/net/wireless/ath/ath10k/hw.h   |  6 ++++++
 3 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 4e849ec924c6..d42f6a1e5bfc 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -2130,6 +2130,9 @@ int ath10k_core_start(struct ath10k *ar, enum ath10k_firmware_mode mode,
 	int status;
 	u32 val;
 
+	if (ar->is_started && ar->hw_params.start_once)
+		return 0;
+
 	lockdep_assert_held(&ar->conf_mutex);
 
 	clear_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags);
@@ -2364,6 +2367,7 @@ int ath10k_core_start(struct ath10k *ar, enum ath10k_firmware_mode mode,
 	if (status)
 		goto err_hif_stop;
 
+	ar->is_started = true;
 	return 0;
 
 err_hif_stop:
@@ -2416,6 +2420,7 @@ void ath10k_core_stop(struct ath10k *ar)
 	ath10k_htt_tx_stop(&ar->htt);
 	ath10k_htt_rx_free(&ar->htt);
 	ath10k_wmi_detach(ar);
+	ar->is_started = false;
 }
 EXPORT_SYMBOL(ath10k_core_stop);
 
@@ -2545,12 +2550,18 @@ static int ath10k_core_probe_fw(struct ath10k *ar)
 		goto err_unlock;
 	}
 
-	ath10k_debug_print_boot_info(ar);
-	ath10k_core_stop(ar);
+	/* Leave target running if hw_params.start_once is set */
+	if (ar->hw_params.start_once) {
+		mutex_unlock(&ar->conf_mutex);
+	} else {
+		ath10k_debug_print_boot_info(ar);
+		ath10k_core_stop(ar);
 
-	mutex_unlock(&ar->conf_mutex);
+		mutex_unlock(&ar->conf_mutex);
+
+		ath10k_hif_power_down(ar);
+	}
 
-	ath10k_hif_power_down(ar);
 	return 0;
 
 err_unlock:
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index 32cfa14d3053..ed96f9ef5209 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -798,6 +798,8 @@ struct ath10k {
 
 	bool p2p;
 
+	bool is_started;
+
 	struct {
 		enum ath10k_bus bus;
 		const struct ath10k_hif_ops *ops;
diff --git a/drivers/net/wireless/ath/ath10k/hw.h b/drivers/net/wireless/ath/ath10k/hw.h
index 53276950c95c..98f9f3ccbf96 100644
--- a/drivers/net/wireless/ath/ath10k/hw.h
+++ b/drivers/net/wireless/ath/ath10k/hw.h
@@ -576,6 +576,12 @@ struct ath10k_hw_params {
 
 	/* Target rx ring fill level */
 	u32 rx_ring_fill_level;
+
+	/* Specifies whether or not the device should be started once.
+	 * If set, the device will be started once by the early fw probe
+	 * and it will not be terminated afterwards.
+	 */
+	bool start_once;
 };
 
 struct htt_rx_desc;
-- 
2.15.1


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[RFC v4 10/18] ath10k: add HTT TX HL ops

[Erik Stromdahl]

Initial HTT TX ops for high latency devices.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/htt_tx.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath10k/htt_tx.c b/drivers/net/wireless/ath/ath10k/htt_tx.c
index 4d0bfb47d162..321f131e417d 100644
--- a/drivers/net/wireless/ath/ath10k/htt_tx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_tx.c
@@ -1565,11 +1565,17 @@ static const struct ath10k_htt_tx_ops htt_tx_ops_64 = {
 	.htt_free_txbuff = ath10k_htt_tx_free_cont_txbuf_64,
 };
 
+static const struct ath10k_htt_tx_ops htt_tx_ops_hl = {
+	.htt_send_frag_desc_bank_cfg = ath10k_htt_send_frag_desc_bank_cfg_32,
+};
+
 void ath10k_htt_set_tx_ops(struct ath10k_htt *htt)
 {
 	struct ath10k *ar = htt->ar;
 
-	if (ar->hw_params.target_64bit)
+	if (ar->is_high_latency)
+		htt->tx_ops = &htt_tx_ops_hl;
+	else if (ar->hw_params.target_64bit)
 		htt->tx_ops = &htt_tx_ops_64;
 	else
 		htt->tx_ops = &htt_tx_ops_32;
-- 
2.15.1


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[RFC v4 11/18] ath10k: add HTT RX HL ops

[Erik Stromdahl]

Initial (empty) HTT RX ops for high latency devices.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/htt_rx.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c
index 1432d5b3e9d3..f7d071ca8b76 100644
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -2917,11 +2917,16 @@ static const struct ath10k_htt_rx_ops htt_rx_ops_64 = {
 	.htt_reset_paddrs_ring = ath10k_htt_reset_paddrs_ring_64,
 };
 
+static const struct ath10k_htt_rx_ops htt_rx_ops_hl = {
+};
+
 void ath10k_htt_set_rx_ops(struct ath10k_htt *htt)
 {
 	struct ath10k *ar = htt->ar;
 
-	if (ar->hw_params.target_64bit)
+	if (ar->is_high_latency)
+		htt->rx_ops = &htt_rx_ops_hl;
+	else if (ar->hw_params.target_64bit)
 		htt->rx_ops = &htt_rx_ops_64;
 	else
 		htt->rx_ops = &htt_rx_ops_32;
-- 
2.15.1


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[RFC v4 12/18] ath10k: htt: RX ring config HL support

[Erik Stromdahl]

Special HTT RX ring config message used by high latency
devices.

The main difference between HL and LL is that HL devices
do not use shared memory between device and host and thus,
no host paddr's are added to the RX config message.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/htt_tx.c | 52 ++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/htt_tx.c b/drivers/net/wireless/ath/ath10k/htt_tx.c
index 321f131e417d..1f6470de7b8d 100644
--- a/drivers/net/wireless/ath/ath10k/htt_tx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_tx.c
@@ -934,6 +934,57 @@ static int ath10k_htt_send_rx_ring_cfg_64(struct ath10k_htt *htt)
 	return 0;
 }
 
+static int ath10k_htt_send_rx_ring_cfg_hl(struct ath10k_htt *htt)
+{
+	struct ath10k *ar = htt->ar;
+	struct sk_buff *skb;
+	struct htt_cmd *cmd;
+	struct htt_rx_ring_setup_ring32 *ring;
+	const int num_rx_ring = 1;
+	u16 flags;
+	int len;
+	int ret;
+
+	/*
+	 * the HW expects the buffer to be an integral number of 4-byte
+	 * "words"
+	 */
+	BUILD_BUG_ON(!IS_ALIGNED(HTT_RX_BUF_SIZE, 4));
+	BUILD_BUG_ON((HTT_RX_BUF_SIZE & HTT_MAX_CACHE_LINE_SIZE_MASK) != 0);
+
+	len = sizeof(cmd->hdr) + sizeof(cmd->rx_setup_32.hdr)
+	    + (sizeof(*ring) * num_rx_ring);
+	skb = ath10k_htc_alloc_skb(ar, len);
+	if (!skb)
+		return -ENOMEM;
+
+	skb_put(skb, len);
+
+	cmd = (struct htt_cmd *)skb->data;
+	ring = &cmd->rx_setup_32.rings[0];
+
+	cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_RX_RING_CFG;
+	cmd->rx_setup_32.hdr.num_rings = 1;
+
+	flags = 0;
+	flags |= HTT_RX_RING_FLAGS_MSDU_PAYLOAD;
+	flags |= HTT_RX_RING_FLAGS_UNICAST_RX;
+	flags |= HTT_RX_RING_FLAGS_MULTICAST_RX;
+
+	memset(ring, 0, sizeof(*ring));
+	ring->rx_ring_len = __cpu_to_le16(HTT_RX_RING_SIZE_MIN);
+	ring->rx_ring_bufsize = __cpu_to_le16(HTT_RX_BUF_SIZE);
+	ring->flags = __cpu_to_le16(flags);
+
+	ret = ath10k_htc_send(&htt->ar->htc, htt->eid, skb);
+	if (ret) {
+		dev_kfree_skb_any(skb);
+		return ret;
+	}
+
+	return 0;
+}
+
 int ath10k_htt_h2t_aggr_cfg_msg(struct ath10k_htt *htt,
 				u8 max_subfrms_ampdu,
 				u8 max_subfrms_amsdu)
@@ -1566,6 +1617,7 @@ static const struct ath10k_htt_tx_ops htt_tx_ops_64 = {
 };
 
 static const struct ath10k_htt_tx_ops htt_tx_ops_hl = {
+	.htt_send_rx_ring_cfg = ath10k_htt_send_rx_ring_cfg_hl,
 	.htt_send_frag_desc_bank_cfg = ath10k_htt_send_frag_desc_bank_cfg_32,
 };
 
-- 
2.15.1


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[RFC v4 13/18] ath10k: htt: High latency TX support

[Erik Stromdahl]

Add HTT TX function for HL interfaces.
Intended for SDIO and USB.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/htt_tx.c | 92 ++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/htt_tx.c b/drivers/net/wireless/ath/ath10k/htt_tx.c
index 1f6470de7b8d..7ea27454ef3f 100644
--- a/drivers/net/wireless/ath/ath10k/htt_tx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_tx.c
@@ -495,6 +495,9 @@ int ath10k_htt_tx_start(struct ath10k_htt *htt)
 	if (htt->tx_mem_allocated)
 		return 0;
 
+	if (ar->is_high_latency)
+		return 0;
+
 	ret = ath10k_htt_tx_alloc_buf(htt);
 	if (ret)
 		goto free_idr_pending_tx;
@@ -1188,6 +1191,94 @@ int ath10k_htt_mgmt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
 	return res;
 }
 
+#define HTT_TX_HL_NEEDED_HEADROOM \
+	(unsigned int)(sizeof(struct htt_cmd_hdr) + \
+	sizeof(struct htt_data_tx_desc) + \
+	sizeof(struct ath10k_htc_hdr))
+
+static int ath10k_htt_tx_hl(struct ath10k_htt *htt, enum ath10k_hw_txrx_mode txmode,
+			    struct sk_buff *msdu)
+{
+	struct ath10k *ar = htt->ar;
+	int res, data_len;
+	struct htt_cmd_hdr *cmd_hdr;
+	struct htt_data_tx_desc *tx_desc;
+	struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(msdu);
+	struct sk_buff *tmp_skb;
+	bool is_eth = (txmode == ATH10K_HW_TXRX_ETHERNET);
+	u8 vdev_id = ath10k_htt_tx_get_vdev_id(ar, msdu);
+	u8 tid = ath10k_htt_tx_get_tid(msdu, is_eth);
+	u8 flags0 = 0;
+	u16 flags1 = 0;
+
+	data_len = msdu->len;
+
+	switch (txmode) {
+	case ATH10K_HW_TXRX_RAW:
+	case ATH10K_HW_TXRX_NATIVE_WIFI:
+		flags0 |= HTT_DATA_TX_DESC_FLAGS0_MAC_HDR_PRESENT;
+		/* fall through */
+	case ATH10K_HW_TXRX_ETHERNET:
+		flags0 |= SM(txmode, HTT_DATA_TX_DESC_FLAGS0_PKT_TYPE);
+		break;
+	case ATH10K_HW_TXRX_MGMT:
+		flags0 |= SM(ATH10K_HW_TXRX_MGMT,
+			     HTT_DATA_TX_DESC_FLAGS0_PKT_TYPE);
+		flags0 |= HTT_DATA_TX_DESC_FLAGS0_MAC_HDR_PRESENT;
+		break;
+	}
+
+	if (skb_cb->flags & ATH10K_SKB_F_NO_HWCRYPT)
+		flags0 |= HTT_DATA_TX_DESC_FLAGS0_NO_ENCRYPT;
+
+	flags1 |= SM((u16)vdev_id, HTT_DATA_TX_DESC_FLAGS1_VDEV_ID);
+	flags1 |= SM((u16)tid, HTT_DATA_TX_DESC_FLAGS1_EXT_TID);
+	if (msdu->ip_summed == CHECKSUM_PARTIAL &&
+	    !test_bit(ATH10K_FLAG_RAW_MODE, &ar->dev_flags)) {
+		flags1 |= HTT_DATA_TX_DESC_FLAGS1_CKSUM_L3_OFFLOAD;
+		flags1 |= HTT_DATA_TX_DESC_FLAGS1_CKSUM_L4_OFFLOAD;
+	}
+
+	/* Prepend the HTT header and TX desc struct to the data message
+	 * and realloc the skb if it does not have enough headroom.
+	 */
+	if (skb_headroom(msdu) < HTT_TX_HL_NEEDED_HEADROOM) {
+		tmp_skb = msdu;
+
+		ath10k_dbg(htt->ar, ATH10K_DBG_HTT,
+			   "Not enough headroom in skb. Current headroom: %u, needed: %u. Reallocating...\n",
+			   skb_headroom(msdu), HTT_TX_HL_NEEDED_HEADROOM);
+		msdu = skb_realloc_headroom(msdu, HTT_TX_HL_NEEDED_HEADROOM);
+		kfree_skb(tmp_skb);
+		if (!msdu) {
+			ath10k_warn(htt->ar, "htt hl tx: Unable to realloc skb!\n");
+			res = -ENOMEM;
+			goto out;
+		}
+	}
+
+	skb_push(msdu, sizeof(*cmd_hdr));
+	skb_push(msdu, sizeof(*tx_desc));
+	cmd_hdr = (struct htt_cmd_hdr *)msdu->data;
+	tx_desc = (struct htt_data_tx_desc *)(msdu->data + sizeof(*cmd_hdr));
+
+	cmd_hdr->msg_type = HTT_H2T_MSG_TYPE_TX_FRM;
+	tx_desc->flags0 = flags0;
+	tx_desc->flags1 = __cpu_to_le16(flags1);
+	tx_desc->len = __cpu_to_le16(data_len);
+	tx_desc->id = 0;
+	tx_desc->frags_paddr = 0; /* always zero */
+	/* Initialize peer_id to INVALID_PEER because this is NOT
+	 * Reinjection path
+	 */
+	tx_desc->peerid = __cpu_to_le32(HTT_INVALID_PEERID);
+
+	res = ath10k_htc_send(&htt->ar->htc, htt->eid, msdu);
+
+out:
+	return res;
+}
+
 static int ath10k_htt_tx_32(struct ath10k_htt *htt,
 			    enum ath10k_hw_txrx_mode txmode,
 			    struct sk_buff *msdu)
@@ -1619,6 +1710,7 @@ static const struct ath10k_htt_tx_ops htt_tx_ops_64 = {
 static const struct ath10k_htt_tx_ops htt_tx_ops_hl = {
 	.htt_send_rx_ring_cfg = ath10k_htt_send_rx_ring_cfg_hl,
 	.htt_send_frag_desc_bank_cfg = ath10k_htt_send_frag_desc_bank_cfg_32,
+	.htt_tx = ath10k_htt_tx_hl,
 };
 
 void ath10k_htt_set_tx_ops(struct ath10k_htt *htt)
-- 
2.15.1


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[RFC v4 14/18] ath10k: htt: High latency RX support

[Erik Stromdahl]

Special HTT RX handling for high latency interfaces.

Since no DMA physical addresses are used in the RX ring
config message (this is not supported by the high latency
devices), no RX ring is allocated.
All RX skb's are allocated by the driver and passed directly
to mac80211 in the HTT RX indication handler.

A nice side effect of this is that no huge buffer will be
allocated with dma_alloc_coherent. On embedded systems with
limited memory resources, the allocation of the RX ring is
prone to fail.

Some tweaks made to "make it work":

Removal of protected bit in 802.11 header frame control field.
The chipset seems to do hw decryption but the frame_control
protected bit is still set.

This is necessary for mac80211 not to drop the frame.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/htt.h     |  47 +++++++++++
 drivers/net/wireless/ath/ath10k/htt_rx.c  | 126 +++++++++++++++++++++++++++++-
 drivers/net/wireless/ath/ath10k/rx_desc.h |  15 ++++
 3 files changed, 185 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/htt.h b/drivers/net/wireless/ath/ath10k/htt.h
index 3fa1be7749b2..e5fb8e0155b6 100644
--- a/drivers/net/wireless/ath/ath10k/htt.h
+++ b/drivers/net/wireless/ath/ath10k/htt.h
@@ -699,6 +699,15 @@ struct htt_rx_indication {
 	struct htt_rx_indication_mpdu_range mpdu_ranges[0];
 } __packed;
 
+/* High latency version of the RX indication */
+struct htt_rx_indication_hl {
+	struct htt_rx_indication_hdr hdr;
+	struct htt_rx_indication_ppdu ppdu;
+	struct htt_rx_indication_prefix prefix;
+	struct fw_rx_desc_hl fw_desc;
+	struct htt_rx_indication_mpdu_range mpdu_ranges[0];
+} __packed;
+
 static inline struct htt_rx_indication_mpdu_range *
 		htt_rx_ind_get_mpdu_ranges(struct htt_rx_indication *rx_ind)
 {
@@ -711,6 +720,18 @@ static inline struct htt_rx_indication_mpdu_range *
 	return ptr;
 }
 
+static inline struct htt_rx_indication_mpdu_range *
+	htt_rx_ind_get_mpdu_ranges_hl(struct htt_rx_indication_hl *rx_ind)
+{
+	void *ptr = rx_ind;
+
+	ptr += sizeof(rx_ind->hdr)
+	     + sizeof(rx_ind->ppdu)
+	     + sizeof(rx_ind->prefix)
+	     + sizeof(rx_ind->fw_desc);
+	return ptr;
+}
+
 enum htt_rx_flush_mpdu_status {
 	HTT_RX_FLUSH_MPDU_DISCARD = 0,
 	HTT_RX_FLUSH_MPDU_REORDER = 1,
@@ -1621,6 +1642,7 @@ struct htt_resp {
 		struct htt_mgmt_tx_completion mgmt_tx_completion;
 		struct htt_data_tx_completion data_tx_completion;
 		struct htt_rx_indication rx_ind;
+		struct htt_rx_indication_hl rx_ind_hl;
 		struct htt_rx_fragment_indication rx_frag_ind;
 		struct htt_rx_peer_map peer_map;
 		struct htt_rx_peer_unmap peer_unmap;
@@ -1973,6 +1995,31 @@ struct htt_rx_desc {
 	u8 msdu_payload[0];
 };
 
+#define HTT_RX_DESC_HL_INFO_SEQ_NUM_MASK           0x00000fff
+#define HTT_RX_DESC_HL_INFO_SEQ_NUM_LSB            0
+#define HTT_RX_DESC_HL_INFO_ENCRYPTED_MASK         0x00001000
+#define HTT_RX_DESC_HL_INFO_ENCRYPTED_LSB          12
+#define HTT_RX_DESC_HL_INFO_CHAN_INFO_PRESENT_MASK 0x00002000
+#define HTT_RX_DESC_HL_INFO_CHAN_INFO_PRESENT_LSB  13
+#define HTT_RX_DESC_HL_INFO_MCAST_BCAST_MASK       0x00008000
+#define HTT_RX_DESC_HL_INFO_MCAST_BCAST_LSB        15
+#define HTT_RX_DESC_HL_INFO_FRAGMENT_MASK          0x00010000
+#define HTT_RX_DESC_HL_INFO_FRAGMENT_LSB           16
+#define HTT_RX_DESC_HL_INFO_KEY_ID_OCT_MASK        0x01fe0000
+#define HTT_RX_DESC_HL_INFO_KEY_ID_OCT_LSB         17
+
+struct htt_rx_desc_base_hl {
+	__le32 info; /* HTT_RX_DESC_HL_INFO_ */
+};
+
+struct htt_rx_chan_info {
+	__le16 primary_chan_center_freq_mhz;
+	__le16 contig_chan1_center_freq_mhz;
+	__le16 contig_chan2_center_freq_mhz;
+	u8 phy_mode;
+	u8 reserved;
+} __packed;
+
 #define HTT_RX_DESC_ALIGN 8
 
 #define HTT_MAC_ADDR_LEN 6
diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c
index f7d071ca8b76..3e0273ea9ad0 100644
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -263,6 +263,9 @@ int ath10k_htt_rx_ring_refill(struct ath10k *ar)
 	struct ath10k_htt *htt = &ar->htt;
 	int ret;
 
+	if (ar->is_high_latency)
+		return 0;
+
 	spin_lock_bh(&htt->rx_ring.lock);
 	ret = ath10k_htt_rx_ring_fill_n(htt, (htt->rx_ring.fill_level -
 					      htt->rx_ring.fill_cnt));
@@ -276,6 +279,9 @@ int ath10k_htt_rx_ring_refill(struct ath10k *ar)
 
 void ath10k_htt_rx_free(struct ath10k_htt *htt)
 {
+	if (htt->ar->is_high_latency)
+		return;
+
 	del_timer_sync(&htt->rx_ring.refill_retry_timer);
 
 	skb_queue_purge(&htt->rx_msdus_q);
@@ -565,6 +571,9 @@ int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
 	size_t size;
 	struct timer_list *timer = &htt->rx_ring.refill_retry_timer;
 
+	if (ar->is_high_latency)
+		return 0;
+
 	htt->rx_confused = false;
 
 	/* XXX: The fill level could be changed during runtime in response to
@@ -1794,8 +1803,114 @@ static int ath10k_htt_rx_handle_amsdu(struct ath10k_htt *htt)
 	return 0;
 }
 
-static void ath10k_htt_rx_proc_rx_ind(struct ath10k_htt *htt,
-				      struct htt_rx_indication *rx)
+static bool ath10k_htt_rx_proc_rx_ind_hl(struct ath10k_htt *htt,
+					 struct htt_rx_indication_hl *rx,
+					 struct sk_buff *skb)
+{
+	struct ath10k *ar = htt->ar;
+	struct ath10k_peer *peer;
+	struct htt_rx_indication_mpdu_range *mpdu_ranges;
+	struct fw_rx_desc_hl *fw_desc;
+	struct ieee80211_hdr *hdr;
+	struct ieee80211_rx_status *rx_status;
+	u16 peer_id;
+	u8 rx_desc_len;
+	int num_mpdu_ranges;
+	size_t tot_hdr_len;
+	struct ieee80211_channel *ch;
+
+	peer_id = __le16_to_cpu(rx->hdr.peer_id);
+
+	peer = ath10k_peer_find_by_id(ar, peer_id);
+	if (!peer)
+		ath10k_warn(ar, "Got RX ind from invalid peer: %u\n", peer_id);
+
+	num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
+			     HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
+	mpdu_ranges = htt_rx_ind_get_mpdu_ranges_hl(rx);
+	fw_desc = &rx->fw_desc;
+	rx_desc_len = fw_desc->len;
+
+	/* I have not yet seen any case where num_mpdu_ranges > 1.
+	 * qcacld does not seem handle that case either, so we introduce the
+	 * same limitiation here as well.
+	 */
+	if (num_mpdu_ranges > 1)
+		ath10k_warn(ar,
+			    "Unsupported number of MPDU ranges: %d, ignoring all but the first\n",
+			    num_mpdu_ranges);
+
+	if (mpdu_ranges->mpdu_range_status !=
+	    HTT_RX_IND_MPDU_STATUS_OK) {
+		ath10k_warn(ar, "MPDU range status: %d\n",
+			    mpdu_ranges->mpdu_range_status);
+		goto err;
+	}
+
+	/* Strip off all headers before the MAC header before delivery to
+	 * mac80211
+	 */
+	tot_hdr_len = sizeof(struct htt_resp_hdr) + sizeof(rx->hdr) +
+		      sizeof(rx->ppdu) + sizeof(rx->prefix) +
+		      sizeof(rx->fw_desc) +
+		      sizeof(*mpdu_ranges) * num_mpdu_ranges + rx_desc_len;
+	skb_pull(skb, tot_hdr_len);
+
+	hdr = (struct ieee80211_hdr *)skb->data;
+	rx_status = IEEE80211_SKB_RXCB(skb);
+	rx_status->chains |= BIT(0);
+	rx_status->signal = ATH10K_DEFAULT_NOISE_FLOOR +
+			    rx->ppdu.combined_rssi;
+	rx_status->flag &= ~RX_FLAG_NO_SIGNAL_VAL;
+
+	spin_lock_bh(&ar->data_lock);
+	ch = ar->scan_channel;
+	if (!ch)
+		ch = ar->rx_channel;
+	if (!ch)
+		ch = ath10k_htt_rx_h_any_channel(ar);
+	if (!ch)
+		ch = ar->tgt_oper_chan;
+	spin_unlock_bh(&ar->data_lock);
+
+	if (ch) {
+		rx_status->band = ch->band;
+		rx_status->freq = ch->center_freq;
+	}
+	if (rx->fw_desc.flags & FW_RX_DESC_FLAGS_LAST_MSDU)
+		rx_status->flag &= ~RX_FLAG_AMSDU_MORE;
+	else
+		rx_status->flag |= RX_FLAG_AMSDU_MORE;
+
+	/* Not entirely sure about this, but all frames from the chipset has
+	 * the protected flag set even though they have already been decrypted.
+	 * Unmasking this flag is necessary in order for mac80211 not to drop
+	 * the frame.
+	 * TODO: Verify this is always the case or find out a way to check
+	 * if there has been hw decryption.
+	 */
+	if (ieee80211_has_protected(hdr->frame_control)) {
+		hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
+		rx_status->flag |= RX_FLAG_DECRYPTED |
+				   RX_FLAG_IV_STRIPPED |
+				   RX_FLAG_MMIC_STRIPPED;
+	}
+
+	ieee80211_rx_ni(ar->hw, skb);
+
+	/* We have delivered the skb to the upper layers (mac80211) so we
+	 * must not free it.
+	 */
+	return false;
+err:
+	/* Tell the caller that it must free the skb since we have not
+	 * consumed it
+	 */
+	return true;
+}
+
+static void ath10k_htt_rx_proc_rx_ind_ll(struct ath10k_htt *htt,
+					 struct htt_rx_indication *rx)
 {
 	struct ath10k *ar = htt->ar;
 	struct htt_rx_indication_mpdu_range *mpdu_ranges;
@@ -2641,7 +2756,12 @@ bool ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
 		break;
 	}
 	case HTT_T2H_MSG_TYPE_RX_IND:
-		ath10k_htt_rx_proc_rx_ind(htt, &resp->rx_ind);
+		if (ar->is_high_latency)
+			return ath10k_htt_rx_proc_rx_ind_hl(htt,
+							    &resp->rx_ind_hl,
+							    skb);
+		else
+			ath10k_htt_rx_proc_rx_ind_ll(htt, &resp->rx_ind);
 		break;
 	case HTT_T2H_MSG_TYPE_PEER_MAP: {
 		struct htt_peer_map_event ev = {
diff --git a/drivers/net/wireless/ath/ath10k/rx_desc.h b/drivers/net/wireless/ath/ath10k/rx_desc.h
index 545deb6d7af1..72cdf8c7245c 100644
--- a/drivers/net/wireless/ath/ath10k/rx_desc.h
+++ b/drivers/net/wireless/ath/ath10k/rx_desc.h
@@ -1275,4 +1275,19 @@ struct fw_rx_desc_base {
 	u8 info0;
 } __packed;
 
+#define FW_RX_DESC_FLAGS_FIRST_MSDU (1 << 0)
+#define FW_RX_DESC_FLAGS_LAST_MSDU  (1 << 1)
+#define FW_RX_DESC_C3_FAILED        (1 << 2)
+#define FW_RX_DESC_C4_FAILED        (1 << 3)
+#define FW_RX_DESC_IPV6             (1 << 4)
+#define FW_RX_DESC_TCP              (1 << 5)
+#define FW_RX_DESC_UDP              (1 << 6)
+
+struct fw_rx_desc_hl {
+	u8 info0;
+	u8 version;
+	u8 len;
+	u8 flags;
+} __packed;
+
 #endif /* _RX_DESC_H_ */
-- 
2.15.1


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[RFC v4 15/18] ath10k: wmi: disable softirq's while calling ieee80211_rx

[Erik Stromdahl]

This is done in order not to trig the below warning in
ieee80211_rx_napi:

WARN_ON_ONCE(softirq_count() == 0);

ieee80211_rx_napi requires that softirq's are disabled during
execution.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/wmi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c
index 58dc2189ba49..3a81d106789d 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -2409,7 +2409,8 @@ int ath10k_wmi_event_mgmt_rx(struct ath10k *ar, struct sk_buff *skb)
 		   status->freq, status->band, status->signal,
 		   status->rate_idx);
 
-	ieee80211_rx(ar->hw, skb);
+	ieee80211_rx_ni(ar->hw, skb);
+
 	return 0;
 }
 
-- 
2.15.1


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[RFC v4 16/18] ath10k: remove htt pending TX count for high latency

[Erik Stromdahl]

High latency chipsets does not seem to send any
HTT_T2H_MSG_TYPE_TX_COMPL_IND for outgoing frames.

This means that htt->num_pending_tx will never be
decremented and we will eventually hit the maximum
limit. All outgoing packets will then be discarded.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/htt_tx.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/htt_tx.c b/drivers/net/wireless/ath/ath10k/htt_tx.c
index 7ea27454ef3f..0c14fb3b7181 100644
--- a/drivers/net/wireless/ath/ath10k/htt_tx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_tx.c
@@ -153,6 +153,9 @@ void ath10k_htt_tx_txq_update(struct ieee80211_hw *hw,
 
 void ath10k_htt_tx_dec_pending(struct ath10k_htt *htt)
 {
+	if (htt->ar->is_high_latency)
+		return;
+
 	lockdep_assert_held(&htt->tx_lock);
 
 	htt->num_pending_tx--;
@@ -162,6 +165,9 @@ void ath10k_htt_tx_dec_pending(struct ath10k_htt *htt)
 
 int ath10k_htt_tx_inc_pending(struct ath10k_htt *htt)
 {
+	if (htt->ar->is_high_latency)
+		return 0;
+
 	lockdep_assert_held(&htt->tx_lock);
 
 	if (htt->num_pending_tx >= htt->max_num_pending_tx)
-- 
2.15.1


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[RFC v4 17/18] ath10k: add QCA9377 usb hw_param item

[Erik Stromdahl]

Hardware parameters for QCA9377 usb devices.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/core.c | 24 ++++++++++++++++++++++++
 drivers/net/wireless/ath/ath10k/hw.h   |  1 +
 2 files changed, 25 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index d42f6a1e5bfc..bc22d8c46252 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -414,6 +414,30 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 		.target_64bit = false,
 		.rx_ring_fill_level = HTT_RX_RING_FILL_LEVEL,
 	},
+	{
+		.id = QCA9377_HW_1_1_DEV_VERSION,
+		.dev_id = QCA9377_1_0_DEVICE_ID,
+		.bus = ATH10K_BUS_USB,
+		.name = "qca9377 hw1.1 usb",
+		.patch_load_addr = QCA9377_HW_1_0_PATCH_LOAD_ADDR,
+		.uart_pin = 6,
+		.otp_exe_param = 0,
+		.channel_counters_freq_hz = 88000,
+		.max_probe_resp_desc_thres = 0,
+		.cal_data_len = 8124,
+		.fw = {
+			.dir = QCA9377_HW_1_0_FW_DIR,
+			.board = QCA9377_HW_1_0_BOARD_DATA_FILE_USB,
+			.board_size = QCA9377_BOARD_DATA_SZ,
+			.board_ext_size = QCA9377_BOARD_EXT_DATA_SZ,
+		},
+		.hw_ops = &qca988x_ops,
+		.decap_align_bytes = 4,
+		.start_once = true,
+		.num_peers = TARGET_QCA9377_HL_NUM_PEERS,
+		.ast_skid_limit = 0x10,
+		.num_wds_entries = 0x20,
+	},
 	{
 		.id = QCA4019_HW_1_0_DEV_VERSION,
 		.dev_id = 0,
diff --git a/drivers/net/wireless/ath/ath10k/hw.h b/drivers/net/wireless/ath/ath10k/hw.h
index 98f9f3ccbf96..38cecbe4ddd9 100644
--- a/drivers/net/wireless/ath/ath10k/hw.h
+++ b/drivers/net/wireless/ath/ath10k/hw.h
@@ -128,6 +128,7 @@ enum qca9377_chip_id_rev {
 /* QCA9377 1.0 definitions */
 #define QCA9377_HW_1_0_FW_DIR          ATH10K_FW_DIR "/QCA9377/hw1.0"
 #define QCA9377_HW_1_0_BOARD_DATA_FILE "board.bin"
+#define QCA9377_HW_1_0_BOARD_DATA_FILE_USB "board-usb.bin"
 #define QCA9377_HW_1_0_PATCH_LOAD_ADDR	0x1234
 
 /* QCA4019 1.0 definitions */
-- 
2.15.1


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[RFC v4 18/18] ath10k: add QCA9377 sdio hw_param item

[Erik Stromdahl]

Hardware parameters for QCA9377 sdio devices.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
---
 drivers/net/wireless/ath/ath10k/core.c | 26 ++++++++++++++++++++++++++
 drivers/net/wireless/ath/ath10k/hw.h   |  1 +
 2 files changed, 27 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index bc22d8c46252..038f58152a83 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -438,6 +438,32 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 		.ast_skid_limit = 0x10,
 		.num_wds_entries = 0x20,
 	},
+	{
+		.id = QCA9377_HW_1_1_DEV_VERSION,
+		.dev_id = QCA9377_1_0_DEVICE_ID,
+		.bus = ATH10K_BUS_SDIO,
+		.name = "qca9377 hw1.1 sdio",
+		.patch_load_addr = QCA9377_HW_1_0_PATCH_LOAD_ADDR,
+		.uart_pin = 19,
+		.otp_exe_param = 0,
+		.channel_counters_freq_hz = 88000,
+		.max_probe_resp_desc_thres = 0,
+		.cal_data_len = 8124,
+		.fw = {
+			.dir = QCA9377_HW_1_0_FW_DIR,
+			.board = QCA9377_HW_1_0_BOARD_DATA_FILE_SDIO,
+			.board_size = QCA9377_BOARD_DATA_SZ,
+			.board_ext_size = QCA9377_BOARD_EXT_DATA_SZ,
+		},
+		.hw_ops = &qca6174_ops,
+		.hw_clk = qca6174_clk,
+		.target_cpu_freq = 176000000,
+		.decap_align_bytes = 4,
+		.start_once = true,
+		.num_peers = TARGET_QCA9377_HL_NUM_PEERS,
+		.ast_skid_limit = 0x10,
+		.num_wds_entries = 0x20,
+	},
 	{
 		.id = QCA4019_HW_1_0_DEV_VERSION,
 		.dev_id = 0,
diff --git a/drivers/net/wireless/ath/ath10k/hw.h b/drivers/net/wireless/ath/ath10k/hw.h
index 38cecbe4ddd9..d610b9cff812 100644
--- a/drivers/net/wireless/ath/ath10k/hw.h
+++ b/drivers/net/wireless/ath/ath10k/hw.h
@@ -129,6 +129,7 @@ enum qca9377_chip_id_rev {
 #define QCA9377_HW_1_0_FW_DIR          ATH10K_FW_DIR "/QCA9377/hw1.0"
 #define QCA9377_HW_1_0_BOARD_DATA_FILE "board.bin"
 #define QCA9377_HW_1_0_BOARD_DATA_FILE_USB "board-usb.bin"
+#define QCA9377_HW_1_0_BOARD_DATA_FILE_SDIO "board-sdio.bin"
 #define QCA9377_HW_1_0_PATCH_LOAD_ADDR	0x1234
 
 /* QCA4019 1.0 definitions */
-- 
2.15.1


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Re: [RFC v4 00/18] ath10k high latency

[Steve deRosier]

Hi Erik,

On Sun, Dec 31, 2017 at 9:29 AM, Erik Stromdahl
<erik.stromdahl@gmail.com> wrote:
> Uplink test results (WUSB6100M -> other computer):
>
> # iperf-client.sh 192.168.1.244
> /usr/bin/iperf
> ------------------------------------------------------------
> Client connecting to 192.168.1.244, TCP port 1234
> TCP window size: 85.0 KByte (default)
> ------------------------------------------------------------
> [  3] local 192.168.1.190 port 50524 connected with 192.168.1.244 port
> 1234
> [ ID] Interval       Transfer     Bandwidth
> [  3]  0.0-10.1 sec  10.8 MBytes  8.95 Mbits/sec
>
> The result is not so good (I expect more from an 11ac device),
> but hopefully it is configuration related.
>

Indeed. As a point of reference, an AR6004 device I have on my desk
(which is a/b/g/n, no ac), built into a custom SBC, I can normally get
iperf runs of >35 Mbits/sec.  So, in short, that run is showing
there's an issue. I don't have your device so I can't really help out
much more than that, but in the next week or so I'll try to look at
the patches and see if something pops to my eye.

- Steve

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