[PATCH net 0/2] pull-request: can 2021-12-09

[PATCH net 0/2] pull-request: can 2021-12-09

[Marc Kleine-Budde]

Hello Jakub, hello David,

this is a pull request of 2 patches for net/master.

Both patches are by Jimmy Assarsson. The first one fixes the
incrementing of the rx/tx error counters in the Kvaser PCIe FD driver.
The second one fixes the Kvaser USB driver by using the CAN clock
frequency provided by the device instead of using a hard coded value.

regards,
Marc

---
The following changes since commit a50e659b2a1be14784e80f8492aab177e67c53a2:

  net: mvpp2: fix XDP rx queues registering (2021-12-08 18:29:37 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can.git tags/linux-can-fixes-for-5.16-20211209

for you to fetch changes up to fb12797ab1fef480ad8a32a30984844444eeb00d:

  can: kvaser_usb: get CAN clock frequency from device (2021-12-09 09:01:43 +0100)

----------------------------------------------------------------
linux-can-fixes-for-5.16-20211209

----------------------------------------------------------------
Jimmy Assarsson (2):
      can: kvaser_pciefd: kvaser_pciefd_rx_error_frame(): increase correct stats->{rx,tx}_errors counter
      can: kvaser_usb: get CAN clock frequency from device

 drivers/net/can/kvaser_pciefd.c                  |   8 +-
 drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c | 101 ++++++++++++++++-------
 2 files changed, 80 insertions(+), 29 deletions(-)

[PATCH net 1/2] can: kvaser_pciefd: kvaser_pciefd_rx_error_frame(): increase correct stats->{rx,tx}_errors counter

[Marc Kleine-Budde]

From: Jimmy Assarsson <extja@kvaser.com>

Check the direction bit in the error frame packet (EPACK) to determine
which net_device_stats {rx,tx}_errors counter to increase.

Fixes: 26ad340e582d ("can: kvaser_pciefd: Add driver for Kvaser PCIEcan devices")
Link: https://lore.kernel.org/all/20211208152122.250852-1-extja@kvaser.com
Cc: stable@vger.kernel.org
Signed-off-by: Jimmy Assarsson <extja@kvaser.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 drivers/net/can/kvaser_pciefd.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/net/can/kvaser_pciefd.c b/drivers/net/can/kvaser_pciefd.c
index 74d9899fc904..eb74cdf26b88 100644
--- a/drivers/net/can/kvaser_pciefd.c
+++ b/drivers/net/can/kvaser_pciefd.c
@@ -248,6 +248,9 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices");
 #define KVASER_PCIEFD_SPACK_EWLR BIT(23)
 #define KVASER_PCIEFD_SPACK_EPLR BIT(24)
 
+/* Kvaser KCAN_EPACK second word */
+#define KVASER_PCIEFD_EPACK_DIR_TX BIT(0)
+
 struct kvaser_pciefd;
 
 struct kvaser_pciefd_can {
@@ -1285,7 +1288,10 @@ static int kvaser_pciefd_rx_error_frame(struct kvaser_pciefd_can *can,
 
 	can->err_rep_cnt++;
 	can->can.can_stats.bus_error++;
-	stats->rx_errors++;
+	if (p->header[1] & KVASER_PCIEFD_EPACK_DIR_TX)
+		stats->tx_errors++;
+	else
+		stats->rx_errors++;
 
 	can->bec.txerr = bec.txerr;
 	can->bec.rxerr = bec.rxerr;

base-commit: a50e659b2a1be14784e80f8492aab177e67c53a2
-- 
2.33.0

[PATCH net 2/2] can: kvaser_usb: get CAN clock frequency from device

[Marc Kleine-Budde]

From: Jimmy Assarsson <extja@kvaser.com>

The CAN clock frequency is used when calculating the CAN bittiming
parameters. When wrong clock frequency is used, the device may end up
with wrong bittiming parameters, depending on user requested bittiming
parameters.

To avoid this, get the CAN clock frequency from the device. Various
existing Kvaser Leaf products use different CAN clocks.

Fixes: 080f40a6fa28 ("can: kvaser_usb: Add support for Kvaser CAN/USB devices")
Link: https://lore.kernel.org/all/20211208152122.250852-2-extja@kvaser.com
Cc: stable@vger.kernel.org
Signed-off-by: Jimmy Assarsson <extja@kvaser.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 .../net/can/usb/kvaser_usb/kvaser_usb_leaf.c  | 101 +++++++++++++-----
 1 file changed, 73 insertions(+), 28 deletions(-)

diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
index 59ba7c7beec0..f7af1bf5ab46 100644
--- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
+++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
@@ -28,10 +28,6 @@
 
 #include "kvaser_usb.h"
 
-/* Forward declaration */
-static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg;
-
-#define CAN_USB_CLOCK			8000000
 #define MAX_USBCAN_NET_DEVICES		2
 
 /* Command header size */
@@ -80,6 +76,12 @@ static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg;
 
 #define CMD_LEAF_LOG_MESSAGE		106
 
+/* Leaf frequency options */
+#define KVASER_USB_LEAF_SWOPTION_FREQ_MASK 0x60
+#define KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK 0
+#define KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK BIT(5)
+#define KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK BIT(6)
+
 /* error factors */
 #define M16C_EF_ACKE			BIT(0)
 #define M16C_EF_CRCE			BIT(1)
@@ -340,6 +342,50 @@ struct kvaser_usb_err_summary {
 	};
 };
 
+static const struct can_bittiming_const kvaser_usb_leaf_bittiming_const = {
+	.name = "kvaser_usb",
+	.tseg1_min = KVASER_USB_TSEG1_MIN,
+	.tseg1_max = KVASER_USB_TSEG1_MAX,
+	.tseg2_min = KVASER_USB_TSEG2_MIN,
+	.tseg2_max = KVASER_USB_TSEG2_MAX,
+	.sjw_max = KVASER_USB_SJW_MAX,
+	.brp_min = KVASER_USB_BRP_MIN,
+	.brp_max = KVASER_USB_BRP_MAX,
+	.brp_inc = KVASER_USB_BRP_INC,
+};
+
+static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg_8mhz = {
+	.clock = {
+		.freq = 8000000,
+	},
+	.timestamp_freq = 1,
+	.bittiming_const = &kvaser_usb_leaf_bittiming_const,
+};
+
+static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg_16mhz = {
+	.clock = {
+		.freq = 16000000,
+	},
+	.timestamp_freq = 1,
+	.bittiming_const = &kvaser_usb_leaf_bittiming_const,
+};
+
+static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg_24mhz = {
+	.clock = {
+		.freq = 24000000,
+	},
+	.timestamp_freq = 1,
+	.bittiming_const = &kvaser_usb_leaf_bittiming_const,
+};
+
+static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg_32mhz = {
+	.clock = {
+		.freq = 32000000,
+	},
+	.timestamp_freq = 1,
+	.bittiming_const = &kvaser_usb_leaf_bittiming_const,
+};
+
 static void *
 kvaser_usb_leaf_frame_to_cmd(const struct kvaser_usb_net_priv *priv,
 			     const struct sk_buff *skb, int *frame_len,
@@ -471,6 +517,27 @@ static int kvaser_usb_leaf_send_simple_cmd(const struct kvaser_usb *dev,
 	return rc;
 }
 
+static void kvaser_usb_leaf_get_software_info_leaf(struct kvaser_usb *dev,
+						   const struct leaf_cmd_softinfo *softinfo)
+{
+	u32 sw_options = le32_to_cpu(softinfo->sw_options);
+
+	dev->fw_version = le32_to_cpu(softinfo->fw_version);
+	dev->max_tx_urbs = le16_to_cpu(softinfo->max_outstanding_tx);
+
+	switch (sw_options & KVASER_USB_LEAF_SWOPTION_FREQ_MASK) {
+	case KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK:
+		dev->cfg = &kvaser_usb_leaf_dev_cfg_16mhz;
+		break;
+	case KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK:
+		dev->cfg = &kvaser_usb_leaf_dev_cfg_24mhz;
+		break;
+	case KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK:
+		dev->cfg = &kvaser_usb_leaf_dev_cfg_32mhz;
+		break;
+	}
+}
+
 static int kvaser_usb_leaf_get_software_info_inner(struct kvaser_usb *dev)
 {
 	struct kvaser_cmd cmd;
@@ -486,14 +553,13 @@ static int kvaser_usb_leaf_get_software_info_inner(struct kvaser_usb *dev)
 
 	switch (dev->card_data.leaf.family) {
 	case KVASER_LEAF:
-		dev->fw_version = le32_to_cpu(cmd.u.leaf.softinfo.fw_version);
-		dev->max_tx_urbs =
-			le16_to_cpu(cmd.u.leaf.softinfo.max_outstanding_tx);
+		kvaser_usb_leaf_get_software_info_leaf(dev, &cmd.u.leaf.softinfo);
 		break;
 	case KVASER_USBCAN:
 		dev->fw_version = le32_to_cpu(cmd.u.usbcan.softinfo.fw_version);
 		dev->max_tx_urbs =
 			le16_to_cpu(cmd.u.usbcan.softinfo.max_outstanding_tx);
+		dev->cfg = &kvaser_usb_leaf_dev_cfg_8mhz;
 		break;
 	}
 
@@ -1225,24 +1291,11 @@ static int kvaser_usb_leaf_init_card(struct kvaser_usb *dev)
 {
 	struct kvaser_usb_dev_card_data *card_data = &dev->card_data;
 
-	dev->cfg = &kvaser_usb_leaf_dev_cfg;
 	card_data->ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES;
 
 	return 0;
 }
 
-static const struct can_bittiming_const kvaser_usb_leaf_bittiming_const = {
-	.name = "kvaser_usb",
-	.tseg1_min = KVASER_USB_TSEG1_MIN,
-	.tseg1_max = KVASER_USB_TSEG1_MAX,
-	.tseg2_min = KVASER_USB_TSEG2_MIN,
-	.tseg2_max = KVASER_USB_TSEG2_MAX,
-	.sjw_max = KVASER_USB_SJW_MAX,
-	.brp_min = KVASER_USB_BRP_MIN,
-	.brp_max = KVASER_USB_BRP_MAX,
-	.brp_inc = KVASER_USB_BRP_INC,
-};
-
 static int kvaser_usb_leaf_set_bittiming(struct net_device *netdev)
 {
 	struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
@@ -1348,11 +1401,3 @@ const struct kvaser_usb_dev_ops kvaser_usb_leaf_dev_ops = {
 	.dev_read_bulk_callback = kvaser_usb_leaf_read_bulk_callback,
 	.dev_frame_to_cmd = kvaser_usb_leaf_frame_to_cmd,
 };
-
-static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg = {
-	.clock = {
-		.freq = CAN_USB_CLOCK,
-	},
-	.timestamp_freq = 1,
-	.bittiming_const = &kvaser_usb_leaf_bittiming_const,
-};
-- 
2.33.0

Re: [PATCH net 1/2] can: kvaser_pciefd: kvaser_pciefd_rx_error_frame(): increase correct stats->{rx,tx}_errors counter

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net.git (master)
by Marc Kleine-Budde <mkl@pengutronix.de>:

On Thu,  9 Dec 2021 09:13:11 +0100 you wrote:
> From: Jimmy Assarsson <extja@kvaser.com>
> 
> Check the direction bit in the error frame packet (EPACK) to determine
> which net_device_stats {rx,tx}_errors counter to increase.
> 
> Fixes: 26ad340e582d ("can: kvaser_pciefd: Add driver for Kvaser PCIEcan devices")
> Link: https://lore.kernel.org/all/20211208152122.250852-1-extja@kvaser.com
> Cc: stable@vger.kernel.org
> Signed-off-by: Jimmy Assarsson <extja@kvaser.com>
> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
> 
> [...]

Here is the summary with links:
  - [net,1/2] can: kvaser_pciefd: kvaser_pciefd_rx_error_frame(): increase correct stats->{rx,tx}_errors counter
    https://git.kernel.org/netdev/net/c/36aea60fc892
  - [net,2/2] can: kvaser_usb: get CAN clock frequency from device
    https://git.kernel.org/netdev/net/c/fb12797ab1fe

You are awesome, thank you!
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