[PATCH net v2 0/6] net:ethernet:aquantia: Atlantic driver Update 2017-08-23

[PATCH net v2 0/6] net:ethernet:aquantia: Atlantic driver Update 2017-08-23

[Pavel Belous]

From: Pavel Belous <pavel.belous@aquantia.com>

This series contains updates for aQuantia Atlantic driver.

It has bugfixes and some improvements.

Changes in v2:
 - "MCP state change" fix removed (will be sent as
    a separate fix after further investigation.)

Igor Russkikh (1):
  net:ethernet:aquantia: Fix for multicast filter handling.

Pavel Belous (5):
  net:ethernet:aquantia: Extra spinlocks removed.
  net:ethernet:aquantia: Fix for number of RSS queues.
  net:ethernet:aquantia: Workaround for HW checksum bug.
  net:ethernet:aquantia: Fix for incorrect speed index.
  net:ethernet:aquantia: Show info message if bad firmware version
    detected.

 drivers/net/ethernet/aquantia/atlantic/aq_hw.h     |  3 +-
 drivers/net/ethernet/aquantia/atlantic/aq_nic.c    | 92 +++++++++++-----------
 drivers/net/ethernet/aquantia/atlantic/aq_ring.c   |  1 -
 drivers/net/ethernet/aquantia/atlantic/aq_utils.h  |  1 -
 drivers/net/ethernet/aquantia/atlantic/aq_vec.c    | 11 +--
 .../ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c  |  6 ++
 .../ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c  |  6 ++
 .../aquantia/atlantic/hw_atl/hw_atl_utils.c        | 10 ++-
 .../aquantia/atlantic/hw_atl/hw_atl_utils.h        |  3 +-
 9 files changed, 68 insertions(+), 65 deletions(-)

-- 
2.7.4

[PATCH net v2 1/6] net:ethernet:aquantia: Extra spinlocks removed.

[Pavel Belous]

From: Pavel Belous <pavel.belous@aquantia.com>

This patch removes datapath spinlocks which does not perform any
useful work.

Fixes: 6e70637f9f1e ("net: ethernet: aquantia: Add ring support code")
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
---
 drivers/net/ethernet/aquantia/atlantic/aq_nic.c   | 42 +++++++----------------
 drivers/net/ethernet/aquantia/atlantic/aq_ring.c  |  1 -
 drivers/net/ethernet/aquantia/atlantic/aq_utils.h |  1 -
 drivers/net/ethernet/aquantia/atlantic/aq_vec.c   | 11 ++----
 4 files changed, 14 insertions(+), 41 deletions(-)

diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
index 9ee1c50..08b7275 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
@@ -597,14 +597,11 @@ static unsigned int aq_nic_map_skb(struct aq_nic_s *self,
 }
 
 int aq_nic_xmit(struct aq_nic_s *self, struct sk_buff *skb)
-__releases(&ring->lock)
-__acquires(&ring->lock)
 {
 	struct aq_ring_s *ring = NULL;
 	unsigned int frags = 0U;
 	unsigned int vec = skb->queue_mapping % self->aq_nic_cfg.vecs;
 	unsigned int tc = 0U;
-	unsigned int trys = AQ_CFG_LOCK_TRYS;
 	int err = NETDEV_TX_OK;
 	bool is_nic_in_bad_state;
 
@@ -628,36 +625,21 @@ __acquires(&ring->lock)
 		goto err_exit;
 	}
 
-	do {
-		if (spin_trylock(&ring->header.lock)) {
-			frags = aq_nic_map_skb(self, skb, ring);
-
-			if (likely(frags)) {
-				err = self->aq_hw_ops.hw_ring_tx_xmit(
-								self->aq_hw,
-								ring, frags);
-				if (err >= 0) {
-					if (aq_ring_avail_dx(ring) <
-					    AQ_CFG_SKB_FRAGS_MAX + 1)
-						aq_nic_ndev_queue_stop(
-								self,
-								ring->idx);
-
-					++ring->stats.tx.packets;
-					ring->stats.tx.bytes += skb->len;
-				}
-			} else {
-				err = NETDEV_TX_BUSY;
-			}
+	frags = aq_nic_map_skb(self, skb, ring);
 
-			spin_unlock(&ring->header.lock);
-			break;
-		}
-	} while (--trys);
+	if (likely(frags)) {
+		err = self->aq_hw_ops.hw_ring_tx_xmit(self->aq_hw,
+						      ring,
+						      frags);
+		if (err >= 0) {
+			if (aq_ring_avail_dx(ring) < AQ_CFG_SKB_FRAGS_MAX + 1)
+				aq_nic_ndev_queue_stop(self, ring->idx);
 
-	if (!trys) {
+			++ring->stats.tx.packets;
+			ring->stats.tx.bytes += skb->len;
+		}
+	} else {
 		err = NETDEV_TX_BUSY;
-		goto err_exit;
 	}
 
 err_exit:
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ring.c b/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
index 9a08179..ec5579f 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
@@ -101,7 +101,6 @@ int aq_ring_init(struct aq_ring_s *self)
 	self->hw_head = 0;
 	self->sw_head = 0;
 	self->sw_tail = 0;
-	spin_lock_init(&self->header.lock);
 	return 0;
 }
 
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_utils.h b/drivers/net/ethernet/aquantia/atlantic/aq_utils.h
index f6012b3..e12bcdf 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_utils.h
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_utils.h
@@ -17,7 +17,6 @@
 #define AQ_DIMOF(_ARY_)  ARRAY_SIZE(_ARY_)
 
 struct aq_obj_s {
-	spinlock_t lock; /* spinlock for nic/rings processing */
 	atomic_t flags;
 };
 
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_vec.c b/drivers/net/ethernet/aquantia/atlantic/aq_vec.c
index ad5b4d4d..fee446a 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_vec.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_vec.c
@@ -34,8 +34,6 @@ struct aq_vec_s {
 #define AQ_VEC_RX_ID 1
 
 static int aq_vec_poll(struct napi_struct *napi, int budget)
-__releases(&self->lock)
-__acquires(&self->lock)
 {
 	struct aq_vec_s *self = container_of(napi, struct aq_vec_s, napi);
 	struct aq_ring_s *ring = NULL;
@@ -47,7 +45,7 @@ __acquires(&self->lock)
 
 	if (!self) {
 		err = -EINVAL;
-	} else if (spin_trylock(&self->header.lock)) {
+	} else {
 		for (i = 0U, ring = self->ring[0];
 			self->tx_rings > i; ++i, ring = self->ring[i]) {
 			if (self->aq_hw_ops->hw_ring_tx_head_update) {
@@ -105,11 +103,8 @@ __acquires(&self->lock)
 			self->aq_hw_ops->hw_irq_enable(self->aq_hw,
 					1U << self->aq_ring_param.vec_idx);
 		}
-
-err_exit:
-		spin_unlock(&self->header.lock);
 	}
-
+err_exit:
 	return work_done;
 }
 
@@ -185,8 +180,6 @@ int aq_vec_init(struct aq_vec_s *self, struct aq_hw_ops *aq_hw_ops,
 	self->aq_hw_ops = aq_hw_ops;
 	self->aq_hw = aq_hw;
 
-	spin_lock_init(&self->header.lock);
-
 	for (i = 0U, ring = self->ring[0];
 		self->tx_rings > i; ++i, ring = self->ring[i]) {
 		err = aq_ring_init(&ring[AQ_VEC_TX_ID]);
-- 
2.7.4

[PATCH net v2 2/6] net:ethernet:aquantia: Fix for number of RSS queues.

[Pavel Belous]

From: Pavel Belous <pavel.belous@aquantia.com>

The number of RSS queues should be not more than numbers of CPU.
Its does not make sense to increase perfomance, and also cause problems on
some motherboards.

Fixes: 94f6c9e4cdf6 ("net: ethernet: aquantia: Support for NIC-specific code")
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
---
 drivers/net/ethernet/aquantia/atlantic/aq_nic.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
index 08b7275..d6d8e70 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
@@ -103,6 +103,8 @@ int aq_nic_cfg_start(struct aq_nic_s *self)
 	else
 		cfg->vecs = 1U;
 
+	cfg->num_rss_queues = min(cfg->vecs, AQ_CFG_NUM_RSS_QUEUES_DEF);
+
 	cfg->irq_type = aq_pci_func_get_irq_type(self->aq_pci_func);
 
 	if ((cfg->irq_type == AQ_HW_IRQ_LEGACY) ||
-- 
2.7.4

[PATCH net v2 3/6] net:ethernet:aquantia: Workaround for HW checksum bug.

[Pavel Belous]

From: Pavel Belous <pavel.belous@aquantia.com>

The hardware has the HW Checksum Offload bug when small
TCP patckets (with length <= 60 bytes) has wrong "checksum valid" bit.

The solution is - ignore checksum valid bit for small packets
(with length <= 60 bytes) and mark this as CHECKSUM_NONE to allow
network stack recalculate checksum itself.

Fixes: ccf9a5ed14be ("net: ethernet: aquantia: Atlantic A0 and B0 specific functions.")
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
---
 drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c | 6 ++++++
 drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
index faeb493..c5a02df 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
@@ -629,6 +629,12 @@ static int hw_atl_a0_hw_ring_rx_receive(struct aq_hw_s *self,
 				buff->is_udp_cso = (is_err & 0x10U) ? 0 : 1;
 			else if (0x0U == (pkt_type & 0x1CU))
 				buff->is_tcp_cso = (is_err & 0x10U) ? 0 : 1;
+
+			/* Checksum offload workaround for small packets */
+			if (rxd_wb->pkt_len <= 60) {
+				buff->is_ip_cso = 0U;
+				buff->is_cso_err = 0U;
+			}
 		}
 
 		is_err &= ~0x18U;
diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
index 1bceb73..21784cc 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
@@ -645,6 +645,12 @@ static int hw_atl_b0_hw_ring_rx_receive(struct aq_hw_s *self,
 				buff->is_udp_cso = buff->is_cso_err ? 0U : 1U;
 			else if (0x0U == (pkt_type & 0x1CU))
 				buff->is_tcp_cso = buff->is_cso_err ? 0U : 1U;
+
+			/* Checksum offload workaround for small packets */
+			if (rxd_wb->pkt_len <= 60) {
+				buff->is_ip_cso = 0U;
+				buff->is_cso_err = 0U;
+			}
 		}
 
 		is_err &= ~0x18U;
-- 
2.7.4

[PATCH net v2 4/6] net:ethernet:aquantia: Fix for incorrect speed index.

[Pavel Belous]

From: Pavel Belous <pavel.belous@aquantia.com>

The driver choose the optimal interrupt throttling settings depends
of current link speed.
Due this bug link_status field from aq_hw is never updated and as result
always used same interrupt throttling values.

Fixes: 3d2ff7eebe26 ("net: ethernet: aquantia: Atlantic hardware abstraction layer")
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
---
 drivers/net/ethernet/aquantia/atlantic/aq_hw.h     |  3 +--
 drivers/net/ethernet/aquantia/atlantic/aq_nic.c    | 31 ++++++++++------------
 .../aquantia/atlantic/hw_atl/hw_atl_utils.c        |  4 +--
 .../aquantia/atlantic/hw_atl/hw_atl_utils.h        |  3 +--
 4 files changed, 18 insertions(+), 23 deletions(-)

diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_hw.h b/drivers/net/ethernet/aquantia/atlantic/aq_hw.h
index fce0fd3..bf9b3f0 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_hw.h
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_hw.h
@@ -105,8 +105,7 @@ struct aq_hw_ops {
 
 	int (*hw_set_mac_address)(struct aq_hw_s *self, u8 *mac_addr);
 
-	int (*hw_get_link_status)(struct aq_hw_s *self,
-				  struct aq_hw_link_status_s *link_status);
+	int (*hw_get_link_status)(struct aq_hw_s *self);
 
 	int (*hw_set_link_speed)(struct aq_hw_s *self, u32 speed);
 
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
index d6d8e70..dce17a5 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
@@ -125,33 +125,30 @@ static void aq_nic_service_timer_cb(unsigned long param)
 	struct net_device *ndev = aq_nic_get_ndev(self);
 	int err = 0;
 	unsigned int i = 0U;
-	struct aq_hw_link_status_s link_status;
 	struct aq_ring_stats_rx_s stats_rx;
 	struct aq_ring_stats_tx_s stats_tx;
 
 	if (aq_utils_obj_test(&self->header.flags, AQ_NIC_FLAGS_IS_NOT_READY))
 		goto err_exit;
 
-	err = self->aq_hw_ops.hw_get_link_status(self->aq_hw, &link_status);
+	err = self->aq_hw_ops.hw_get_link_status(self->aq_hw);
 	if (err < 0)
 		goto err_exit;
 
-	self->aq_hw_ops.hw_interrupt_moderation_set(self->aq_hw,
-			    self->aq_nic_cfg.is_interrupt_moderation);
-
-	if (memcmp(&link_status, &self->link_status, sizeof(link_status))) {
-		if (link_status.mbps) {
-			aq_utils_obj_set(&self->header.flags,
-					 AQ_NIC_FLAG_STARTED);
-			aq_utils_obj_clear(&self->header.flags,
-					   AQ_NIC_LINK_DOWN);
-			netif_carrier_on(self->ndev);
-		} else {
-			netif_carrier_off(self->ndev);
-			aq_utils_obj_set(&self->header.flags, AQ_NIC_LINK_DOWN);
-		}
+	self->link_status = self->aq_hw->aq_link_status;
 
-		self->link_status = link_status;
+	self->aq_hw_ops.hw_interrupt_moderation_set(self->aq_hw,
+		    self->aq_nic_cfg.is_interrupt_moderation);
+
+	if (self->link_status.mbps) {
+		aq_utils_obj_set(&self->header.flags,
+				 AQ_NIC_FLAG_STARTED);
+		aq_utils_obj_clear(&self->header.flags,
+				   AQ_NIC_LINK_DOWN);
+		netif_carrier_on(self->ndev);
+	} else {
+		netif_carrier_off(self->ndev);
+		aq_utils_obj_set(&self->header.flags, AQ_NIC_LINK_DOWN);
 	}
 
 	memset(&stats_rx, 0U, sizeof(struct aq_ring_stats_rx_s));
diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
index 8d6d8f5..7a1332e 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
@@ -313,11 +313,11 @@ void hw_atl_utils_mpi_set(struct aq_hw_s *self,
 err_exit:;
 }
 
-int hw_atl_utils_mpi_get_link_status(struct aq_hw_s *self,
-				     struct aq_hw_link_status_s *link_status)
+int hw_atl_utils_mpi_get_link_status(struct aq_hw_s *self)
 {
 	u32 cp0x036C = aq_hw_read_reg(self, HW_ATL_MPI_STATE_ADR);
 	u32 link_speed_mask = cp0x036C >> HW_ATL_MPI_SPEED_SHIFT;
+	struct aq_hw_link_status_s *link_status = &self->aq_link_status;
 
 	if (!link_speed_mask) {
 		link_status->mbps = 0U;
diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.h b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.h
index a66aee5..e0360a6 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.h
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.h
@@ -180,8 +180,7 @@ void hw_atl_utils_mpi_set(struct aq_hw_s *self,
 int hw_atl_utils_mpi_set_speed(struct aq_hw_s *self, u32 speed,
 			       enum hal_atl_utils_fw_state_e state);
 
-int hw_atl_utils_mpi_get_link_status(struct aq_hw_s *self,
-				     struct aq_hw_link_status_s *link_status);
+int hw_atl_utils_mpi_get_link_status(struct aq_hw_s *self);
 
 int hw_atl_utils_get_mac_permanent(struct aq_hw_s *self,
 				   struct aq_hw_caps_s *aq_hw_caps,
-- 
2.7.4

[PATCH net v2 5/6] net:ethernet:aquantia: Fix for multicast filter handling.

[Pavel Belous]

From: Igor Russkikh <Igor.Russkikh@aquantia.com>

Since the HW supports up to 32 multicast filters we should
track count of multicast filters to avoid overflow.
If we attempt to add >32 multicast filter - just set NETIF_ALLMULTI flag
instead.

Fixes: 94f6c9e4cdf6 ("net: ethernet: aquantia: Support for NIC-specific code")
Signed-off-by: Igor Russkikh <Igor.Russkikh@aquantia.com>
---
 drivers/net/ethernet/aquantia/atlantic/aq_nic.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
index dce17a5..6ac9e26 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
@@ -669,11 +669,26 @@ int aq_nic_set_multicast_list(struct aq_nic_s *self, struct net_device *ndev)
 	netdev_for_each_mc_addr(ha, ndev) {
 		ether_addr_copy(self->mc_list.ar[i++], ha->addr);
 		++self->mc_list.count;
+
+		if (i >= AQ_CFG_MULTICAST_ADDRESS_MAX)
+			break;
 	}
 
-	return self->aq_hw_ops.hw_multicast_list_set(self->aq_hw,
+	if (i >= AQ_CFG_MULTICAST_ADDRESS_MAX) {
+		/* Number of filters is too big: atlantic does not support this.
+		 * Force all multi filter to support this.
+		 * With this we disable all UC filters and setup "all pass"
+		 * multicast mask
+		 */
+		self->packet_filter |= IFF_ALLMULTI;
+		self->aq_hw->aq_nic_cfg->mc_list_count = 0;
+		return self->aq_hw_ops.hw_packet_filter_set(self->aq_hw,
+							self->packet_filter);
+	} else {
+		return self->aq_hw_ops.hw_multicast_list_set(self->aq_hw,
 						    self->mc_list.ar,
 						    self->mc_list.count);
+	}
 }
 
 int aq_nic_set_mtu(struct aq_nic_s *self, int new_mtu)
-- 
2.7.4

[PATCH net v2 6/6] net:ethernet:aquantia: Show info message if bad firmware version detected.

[Pavel Belous]

From: Pavel Belous <pavel.belous@aquantia.com>

We should inform user about wrong firmware version
by printing message in dmesg.

Fixes: 3d2ff7eebe26 ("net: ethernet: aquantia: Atlantic hardware abstraction layer")
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
---
 drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
index 7a1332e..4f5ec9a 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
@@ -141,6 +141,12 @@ static int hw_atl_utils_init_ucp(struct aq_hw_s *self,
 
 	err = hw_atl_utils_ver_match(aq_hw_caps->fw_ver_expected,
 				     aq_hw_read_reg(self, 0x18U));
+
+	if (err < 0)
+		pr_err("%s: Bad FW version detected: expected=%x, actual=%x\n",
+		       AQ_CFG_DRV_NAME,
+		       aq_hw_caps->fw_ver_expected,
+		       aq_hw_read_reg(self, 0x18U));
 	return err;
 }
 
-- 
2.7.4

Re: [PATCH net v2 0/6] net:ethernet:aquantia: Atlantic driver Update 2017-08-23

[David Miller]

From: Pavel Belous <Pavel.Belous@aquantia.com>
Date: Mon, 28 Aug 2017 21:52:07 +0300

> From: Pavel Belous <pavel.belous@aquantia.com>
> 
> This series contains updates for aQuantia Atlantic driver.
> 
> It has bugfixes and some improvements.
> 
> Changes in v2:
>  - "MCP state change" fix removed (will be sent as
>     a separate fix after further investigation.)

Series applied, thanks.