diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2023-06-22 20:05:25 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-06-22 20:05:25 -0700 |
| commit | 08eeccb2491a3198f4adcba63adeace6e2499ea3 (patch) | |
| tree | a26d18e93bb4461dd9ccccf5ed03f88d747781fa | |
| parent | 0ec92a8f56ff07237dbe8af7c7a72aba7f957baf (diff) | |
| parent | 790ef3901f18be794f5b246f990f305bbd08ffd7 (diff) | |
Merge tag 'linux-can-next-for-6.5-20230622' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next
Marc Kleine-Budde says:
====================
pull-request: can-next 2023-06-22
The first patch is by Carsten Schmidt, targets the kvaser_usb driver
and adds len8_dlc support.
Marcel Hellwig's patch for the xilinx_can driver adds support for CAN
transceivers via the PHY framework.
Frank Jungclaus contributes 6+2 patches for the esd_usb driver in
preparation for the upcoming CAN-USB/3 support.
The 2 patches by Miquel Raynal for the sja1000 driver work around
overruns stalls on the Renesas SoCs.
The next 3 patches are by me and fix the coding style in the
rx-offload helper and in the m_can and ti_hecc driver.
Vincent Mailhol contributes 3 patches to fix and update the
calculation of the length of CAN frames on the wire.
Oliver Hartkopp's patch moves the CAN_RAW_FILTER_MAX definition into
the correct header.
The remaining 14 patches are by Jimmy Assarsson, target the
kvaser_pciefd driver and bring various updates and improvements.
* tag 'linux-can-next-for-6.5-20230622' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next: (33 commits)
can: kvaser_pciefd: Use TX FIFO size read from CAN controller
can: kvaser_pciefd: Refactor code
can: kvaser_pciefd: Add len8_dlc support
can: kvaser_pciefd: Use FIELD_{GET,PREP} and GENMASK where appropriate
can: kvaser_pciefd: Sort register definitions
can: kvaser_pciefd: Change return type for kvaser_pciefd_{receive,transmit,set_tx}_irq()
can: kvaser_pciefd: Rename device ID defines
can: kvaser_pciefd: Sort includes in alphabetic order
can: kvaser_pciefd: Remove SPI flash parameter read functionality
can: uapi: move CAN_RAW_FILTER_MAX definition to raw.h
can: kvaser_pciefd: Define unsigned constants with type suffix 'U'
can: kvaser_pciefd: Set hardware timestamp on transmitted packets
can: kvaser_pciefd: Add function to set skb hwtstamps
can: kvaser_pciefd: Remove handler for unused KVASER_PCIEFD_PACK_TYPE_EFRAME_ACK
can: kvaser_pciefd: Remove useless write to interrupt register
can: length: refactor frame lengths definition to add size in bits
can: length: fix bitstuffing count
can: length: fix description of the RRS field
can: m_can: fix coding style
can: ti_hecc: fix coding style
...
====================
Link: https://lore.kernel.org/r/20230622082658.571150-1-mkl@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/can/Kconfig | 3 | ||||
| -rw-r--r-- | drivers/net/can/dev/length.c | 15 | ||||
| -rw-r--r-- | drivers/net/can/dev/rx-offload.c | 2 | ||||
| -rw-r--r-- | drivers/net/can/kvaser_pciefd.c | 955 | ||||
| -rw-r--r-- | drivers/net/can/m_can/m_can.c | 4 | ||||
| -rw-r--r-- | drivers/net/can/sja1000/sja1000.c | 40 | ||||
| -rw-r--r-- | drivers/net/can/sja1000/sja1000.h | 1 | ||||
| -rw-r--r-- | drivers/net/can/sja1000/sja1000_platform.c | 5 | ||||
| -rw-r--r-- | drivers/net/can/ti_hecc.c | 2 | ||||
| -rw-r--r-- | drivers/net/can/usb/esd_usb.c | 352 | ||||
| -rw-r--r-- | drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c | 2 | ||||
| -rw-r--r-- | drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c | 13 | ||||
| -rw-r--r-- | drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c | 6 | ||||
| -rw-r--r-- | drivers/net/can/xilinx_can.c | 19 | ||||
| -rw-r--r-- | include/linux/can/length.h | 299 | ||||
| -rw-r--r-- | include/uapi/linux/can.h | 1 | ||||
| -rw-r--r-- | include/uapi/linux/can/raw.h | 2 |
17 files changed, 809 insertions, 912 deletions
diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig index b190007c01be..a5c5036dfb94 100644 --- a/drivers/net/can/Kconfig +++ b/drivers/net/can/Kconfig @@ -153,8 +153,7 @@ config CAN_JANZ_ICAN3 config CAN_KVASER_PCIEFD depends on PCI tristate "Kvaser PCIe FD cards" - select CRC32 - help + help This is a driver for the Kvaser PCI Express CAN FD family. Supported devices: diff --git a/drivers/net/can/dev/length.c b/drivers/net/can/dev/length.c index b48140b1102e..b7f4d76dd444 100644 --- a/drivers/net/can/dev/length.c +++ b/drivers/net/can/dev/length.c @@ -78,18 +78,7 @@ unsigned int can_skb_get_frame_len(const struct sk_buff *skb) else len = cf->len; - if (can_is_canfd_skb(skb)) { - if (cf->can_id & CAN_EFF_FLAG) - len += CANFD_FRAME_OVERHEAD_EFF; - else - len += CANFD_FRAME_OVERHEAD_SFF; - } else { - if (cf->can_id & CAN_EFF_FLAG) - len += CAN_FRAME_OVERHEAD_EFF; - else - len += CAN_FRAME_OVERHEAD_SFF; - } - - return len; + return can_frame_bytes(can_is_canfd_skb(skb), cf->can_id & CAN_EFF_FLAG, + false, len); } EXPORT_SYMBOL_GPL(can_skb_get_frame_len); diff --git a/drivers/net/can/dev/rx-offload.c b/drivers/net/can/dev/rx-offload.c index 81ebf0562c89..161e45a7e8c1 100644 --- a/drivers/net/can/dev/rx-offload.c +++ b/drivers/net/can/dev/rx-offload.c @@ -220,7 +220,7 @@ int can_rx_offload_irq_offload_fifo(struct can_rx_offload *offload) EXPORT_SYMBOL_GPL(can_rx_offload_irq_offload_fifo); int can_rx_offload_queue_timestamp(struct can_rx_offload *offload, - struct sk_buff *skb, u32 timestamp) + struct sk_buff *skb, u32 timestamp) { struct can_rx_offload_cb *cb; diff --git a/drivers/net/can/kvaser_pciefd.c b/drivers/net/can/kvaser_pciefd.c index be189edb256c..db6256f2b1b3 100644 --- a/drivers/net/can/kvaser_pciefd.c +++ b/drivers/net/can/kvaser_pciefd.c @@ -3,19 +3,19 @@ * Parts of this driver are based on the following: * - Kvaser linux pciefd driver (version 5.25) * - PEAK linux canfd driver - * - Altera Avalon EPCS flash controller driver */ -#include <linux/kernel.h> -#include <linux/module.h> +#include <linux/bitfield.h> +#include <linux/can/dev.h> #include <linux/device.h> #include <linux/ethtool.h> +#include <linux/iopoll.h> +#include <linux/kernel.h> +#include <linux/minmax.h> +#include <linux/module.h> +#include <linux/netdevice.h> #include <linux/pci.h> -#include <linux/can/dev.h> #include <linux/timer.h> -#include <linux/netdevice.h> -#include <linux/crc32.h> -#include <linux/iopoll.h> MODULE_LICENSE("Dual BSD/GPL"); MODULE_AUTHOR("Kvaser AB <support@kvaser.com>"); @@ -25,42 +25,25 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices"); #define KVASER_PCIEFD_WAIT_TIMEOUT msecs_to_jiffies(1000) #define KVASER_PCIEFD_BEC_POLL_FREQ (jiffies + msecs_to_jiffies(200)) -#define KVASER_PCIEFD_MAX_ERR_REP 256 -#define KVASER_PCIEFD_CAN_TX_MAX_COUNT 17 -#define KVASER_PCIEFD_MAX_CAN_CHANNELS 4 -#define KVASER_PCIEFD_DMA_COUNT 2 +#define KVASER_PCIEFD_MAX_ERR_REP 256U +#define KVASER_PCIEFD_CAN_TX_MAX_COUNT 17U +#define KVASER_PCIEFD_MAX_CAN_CHANNELS 4UL +#define KVASER_PCIEFD_DMA_COUNT 2U -#define KVASER_PCIEFD_DMA_SIZE (4 * 1024) -#define KVASER_PCIEFD_64BIT_DMA_BIT BIT(0) +#define KVASER_PCIEFD_DMA_SIZE (4U * 1024U) #define KVASER_PCIEFD_VENDOR 0x1a07 -#define KVASER_PCIEFD_4HS_ID 0x0d -#define KVASER_PCIEFD_2HS_ID 0x0e -#define KVASER_PCIEFD_HS_ID 0x0f -#define KVASER_PCIEFD_MINIPCIE_HS_ID 0x10 -#define KVASER_PCIEFD_MINIPCIE_2HS_ID 0x11 +#define KVASER_PCIEFD_4HS_DEVICE_ID 0x000d +#define KVASER_PCIEFD_2HS_V2_DEVICE_ID 0x000e +#define KVASER_PCIEFD_HS_V2_DEVICE_ID 0x000f +#define KVASER_PCIEFD_MINIPCIE_HS_V2_DEVICE_ID 0x0010 +#define KVASER_PCIEFD_MINIPCIE_2HS_V2_DEVICE_ID 0x0011 /* PCIe IRQ registers */ #define KVASER_PCIEFD_IRQ_REG 0x40 #define KVASER_PCIEFD_IEN_REG 0x50 -/* DMA map */ +/* DMA address translation map register base */ #define KVASER_PCIEFD_DMA_MAP_BASE 0x1000 -/* Kvaser KCAN CAN controller registers */ -#define KVASER_PCIEFD_KCAN0_BASE 0x10000 -#define KVASER_PCIEFD_KCAN_BASE_OFFSET 0x1000 -#define KVASER_PCIEFD_KCAN_FIFO_REG 0x100 -#define KVASER_PCIEFD_KCAN_FIFO_LAST_REG 0x180 -#define KVASER_PCIEFD_KCAN_CTRL_REG 0x2c0 -#define KVASER_PCIEFD_KCAN_CMD_REG 0x400 -#define KVASER_PCIEFD_KCAN_IEN_REG 0x408 -#define KVASER_PCIEFD_KCAN_IRQ_REG 0x410 -#define KVASER_PCIEFD_KCAN_TX_NPACKETS_REG 0x414 -#define KVASER_PCIEFD_KCAN_STAT_REG 0x418 -#define KVASER_PCIEFD_KCAN_MODE_REG 0x41c -#define KVASER_PCIEFD_KCAN_BTRN_REG 0x420 -#define KVASER_PCIEFD_KCAN_BUS_LOAD_REG 0x424 -#define KVASER_PCIEFD_KCAN_BTRD_REG 0x428 -#define KVASER_PCIEFD_KCAN_PWM_REG 0x430 /* Loopback control register */ #define KVASER_PCIEFD_LOOP_REG 0x1f000 /* System identification and information registers */ @@ -78,183 +61,196 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices"); #define KVASER_PCIEFD_SRB_STAT_REG (KVASER_PCIEFD_SRB_BASE + 0x210) #define KVASER_PCIEFD_SRB_RX_NR_PACKETS_REG (KVASER_PCIEFD_SRB_BASE + 0x214) #define KVASER_PCIEFD_SRB_CTRL_REG (KVASER_PCIEFD_SRB_BASE + 0x218) -/* EPCS flash controller registers */ -#define KVASER_PCIEFD_SPI_BASE 0x1fc00 -#define KVASER_PCIEFD_SPI_RX_REG KVASER_PCIEFD_SPI_BASE -#define KVASER_PCIEFD_SPI_TX_REG (KVASER_PCIEFD_SPI_BASE + 0x4) -#define KVASER_PCIEFD_SPI_STATUS_REG (KVASER_PCIEFD_SPI_BASE + 0x8) -#define KVASER_PCIEFD_SPI_CTRL_REG (KVASER_PCIEFD_SPI_BASE + 0xc) -#define KVASER_PCIEFD_SPI_SSEL_REG (KVASER_PCIEFD_SPI_BASE + 0x14) - -#define KVASER_PCIEFD_IRQ_ALL_MSK 0x1f +/* Kvaser KCAN CAN controller registers */ +#define KVASER_PCIEFD_KCAN0_BASE 0x10000 +#define KVASER_PCIEFD_KCAN_BASE_OFFSET 0x1000 +#define KVASER_PCIEFD_KCAN_FIFO_REG 0x100 +#define KVASER_PCIEFD_KCAN_FIFO_LAST_REG 0x180 +#define KVASER_PCIEFD_KCAN_CTRL_REG 0x2c0 +#define KVASER_PCIEFD_KCAN_CMD_REG 0x400 +#define KVASER_PCIEFD_KCAN_IEN_REG 0x408 +#define KVASER_PCIEFD_KCAN_IRQ_REG 0x410 +#define KVASER_PCIEFD_KCAN_TX_NR_PACKETS_REG 0x414 +#define KVASER_PCIEFD_KCAN_STAT_REG 0x418 +#define KVASER_PCIEFD_KCAN_MODE_REG 0x41c +#define KVASER_PCIEFD_KCAN_BTRN_REG 0x420 +#define KVASER_PCIEFD_KCAN_BUS_LOAD_REG 0x424 +#define KVASER_PCIEFD_KCAN_BTRD_REG 0x428 +#define KVASER_PCIEFD_KCAN_PWM_REG 0x430 + +/* PCI interrupt fields */ #define KVASER_PCIEFD_IRQ_SRB BIT(4) +#define KVASER_PCIEFD_IRQ_ALL_MASK GENMASK(4, 0) -#define KVASER_PCIEFD_SYSID_NRCHAN_SHIFT 24 -#define KVASER_PCIEFD_SYSID_MAJOR_VER_SHIFT 16 -#define KVASER_PCIEFD_SYSID_BUILD_VER_SHIFT 1 +/* Enable 64-bit DMA address translation */ +#define KVASER_PCIEFD_64BIT_DMA_BIT BIT(0) + +/* System build information fields */ +#define KVASER_PCIEFD_SYSID_VERSION_NR_CHAN_MASK GENMASK(31, 24) +#define KVASER_PCIEFD_SYSID_VERSION_MAJOR_MASK GENMASK(23, 16) +#define KVASER_PCIEFD_SYSID_VERSION_MINOR_MASK GENMASK(7, 0) +#define KVASER_PCIEFD_SYSID_BUILD_SEQ_MASK GENMASK(15, 1) /* Reset DMA buffer 0, 1 and FIFO offset */ -#define KVASER_PCIEFD_SRB_CMD_RDB0 BIT(4) #define KVASER_PCIEFD_SRB_CMD_RDB1 BIT(5) +#define KVASER_PCIEFD_SRB_CMD_RDB0 BIT(4) #define KVASER_PCIEFD_SRB_CMD_FOR BIT(0) -/* DMA packet done, buffer 0 and 1 */ -#define KVASER_PCIEFD_SRB_IRQ_DPD0 BIT(8) -#define KVASER_PCIEFD_SRB_IRQ_DPD1 BIT(9) -/* DMA overflow, buffer 0 and 1 */ -#define KVASER_PCIEFD_SRB_IRQ_DOF0 BIT(10) -#define KVASER_PCIEFD_SRB_IRQ_DOF1 BIT(11) /* DMA underflow, buffer 0 and 1 */ -#define KVASER_PCIEFD_SRB_IRQ_DUF0 BIT(12) #define KVASER_PCIEFD_SRB_IRQ_DUF1 BIT(13) +#define KVASER_PCIEFD_SRB_IRQ_DUF0 BIT(12) +/* DMA overflow, buffer 0 and 1 */ +#define KVASER_PCIEFD_SRB_IRQ_DOF1 BIT(11) +#define KVASER_PCIEFD_SRB_IRQ_DOF0 BIT(10) +/* DMA packet done, buffer 0 and 1 */ +#define KVASER_PCIEFD_SRB_IRQ_DPD1 BIT(9) +#define KVASER_PCIEFD_SRB_IRQ_DPD0 BIT(8) +/* Got DMA support */ +#define KVASER_PCIEFD_SRB_STAT_DMA BIT(24) /* DMA idle */ #define KVASER_PCIEFD_SRB_STAT_DI BIT(15) -/* DMA support */ -#define KVASER_PCIEFD_SRB_STAT_DMA BIT(24) /* SRB current packet level */ -#define KVASER_PCIEFD_SRB_RX_NR_PACKETS_MASK 0xff +#define KVASER_PCIEFD_SRB_RX_NR_PACKETS_MASK GENMASK(7, 0) /* DMA Enable */ #define KVASER_PCIEFD_SRB_CTRL_DMA_ENABLE BIT(0) -/* EPCS flash controller definitions */ -#define KVASER_PCIEFD_CFG_IMG_SZ (64 * 1024) -#define KVASER_PCIEFD_CFG_IMG_OFFSET (31 * 65536L) -#define KVASER_PCIEFD_CFG_MAX_PARAMS 256 -#define KVASER_PCIEFD_CFG_MAGIC 0xcafef00d -#define KVASER_PCIEFD_CFG_PARAM_MAX_SZ 24 -#define KVASER_PCIEFD_CFG_SYS_VER 1 -#define KVASER_PCIEFD_CFG_PARAM_NR_CHAN 130 -#define KVASER_PCIEFD_SPI_TMT BIT(5) -#define KVASER_PCIEFD_SPI_TRDY BIT(6) -#define KVASER_PCIEFD_SPI_RRDY BIT(7) -#define KVASER_PCIEFD_FLASH_ID_EPCS16 0x14 -/* Commands for controlling the onboard flash */ -#define KVASER_PCIEFD_FLASH_RES_CMD 0xab -#define KVASER_PCIEFD_FLASH_READ_CMD 0x3 -#define KVASER_PCIEFD_FLASH_STATUS_CMD 0x5 - -/* Kvaser KCAN definitions */ -#define KVASER_PCIEFD_KCAN_CTRL_EFLUSH (4 << 29) -#define KVASER_PCIEFD_KCAN_CTRL_EFRAME (5 << 29) - -#define KVASER_PCIEFD_KCAN_CMD_SEQ_SHIFT 16 -/* Request status packet */ -#define KVASER_PCIEFD_KCAN_CMD_SRQ BIT(0) +/* KCAN CTRL packet types */ +#define KVASER_PCIEFD_KCAN_CTRL_TYPE_MASK GENMASK(31, 29) +#define KVASER_PCIEFD_KCAN_CTRL_TYPE_EFLUSH 0x4 +#define KVASER_PCIEFD_KCAN_CTRL_TYPE_EFRAME 0x5 + +/* Command sequence number */ +#define KVASER_PCIEFD_KCAN_CMD_SEQ_MASK GENMASK(23, 16) +/* Command bits */ +#define KVASER_PCIEFD_KCAN_CMD_MASK GENMASK(5, 0) /* Abort, flush and reset */ #define KVASER_PCIEFD_KCAN_CMD_AT BIT(1) +/* Request status packet */ +#define KVASER_PCIEFD_KCAN_CMD_SRQ BIT(0) -/* Tx FIFO unaligned read */ -#define KVASER_PCIEFD_KCAN_IRQ_TAR BIT(0) -/* Tx FIFO unaligned end */ -#define KVASER_PCIEFD_KCAN_IRQ_TAE BIT(1) -/* Bus parameter protection error */ -#define KVASER_PCIEFD_KCAN_IRQ_BPP BIT(2) -/* FDF bit when controller is in classic mode */ -#define KVASER_PCIEFD_KCAN_IRQ_FDIC BIT(3) -/* Rx FIFO overflow */ -#define KVASER_PCIEFD_KCAN_IRQ_ROF BIT(5) -/* Abort done */ -#define KVASER_PCIEFD_KCAN_IRQ_ABD BIT(13) -/* Tx buffer flush done */ -#define KVASER_PCIEFD_KCAN_IRQ_TFD BIT(14) -/* Tx FIFO overflow */ -#define KVASER_PCIEFD_KCAN_IRQ_TOF BIT(15) -/* Tx FIFO empty */ -#define KVASER_PCIEFD_KCAN_IRQ_TE BIT(16) /* Transmitter unaligned */ #define KVASER_PCIEFD_KCAN_IRQ_TAL BIT(17) +/* Tx FIFO empty */ +#define KVASER_PCIEFD_KCAN_IRQ_TE BIT(16) +/* Tx FIFO overflow */ +#define KVASER_PCIEFD_KCAN_IRQ_TOF BIT(15) +/* Tx buffer flush done */ +#define KVASER_PCIEFD_KCAN_IRQ_TFD BIT(14) +/* Abort done */ +#define KVASER_PCIEFD_KCAN_IRQ_ABD BIT(13) +/* Rx FIFO overflow */ +#define KVASER_PCIEFD_KCAN_IRQ_ROF BIT(5) +/* FDF bit when controller is in classic CAN mode */ +#define KVASER_PCIEFD_KCAN_IRQ_FDIC BIT(3) +/* Bus parameter protection error */ +#define KVASER_PCIEFD_KCAN_IRQ_BPP BIT(2) +/* Tx FIFO unaligned end */ +#define KVASER_PCIEFD_KCAN_IRQ_TAE BIT(1) +/* Tx FIFO unaligned read */ +#define KVASER_PCIEFD_KCAN_IRQ_TAR BIT(0) -#define KVASER_PCIEFD_KCAN_TX_NPACKETS_MAX_SHIFT 16 +/* Tx FIFO size */ +#define KVASER_PCIEFD_KCAN_TX_NR_PACKETS_MAX_MASK GENMASK(23, 16) +/* Tx FIFO current packet level */ +#define KVASER_PCIEFD_KCAN_TX_NR_PACKETS_CURRENT_MASK GENMASK(7, 0) -#define KVASER_PCIEFD_KCAN_STAT_SEQNO_SHIFT 24 -/* Abort request */ -#define KVASER_PCIEFD_KCAN_STAT_AR BIT(7) -/* Idle state. Controller in reset mode and no abort or flush pending */ -#define KVASER_PCIEFD_KCAN_STAT_IDLE BIT(10) -/* Bus off */ -#define KVASER_PCIEFD_KCAN_STAT_BOFF BIT(11) -/* Reset mode request */ -#define KVASER_PCIEFD_KCAN_STAT_RMR BIT(14) -/* Controller in reset mode */ -#define KVASER_PCIEFD_KCAN_STAT_IRM BIT(15) -/* Controller got one-shot capability */ -#define KVASER_PCIEFD_KCAN_STAT_CAP BIT(16) +/* Current status packet sequence number */ +#define KVASER_PCIEFD_KCAN_STAT_SEQNO_MASK GENMASK(31, 24) /* Controller got CAN FD capability */ #define KVASER_PCIEFD_KCAN_STAT_FD BIT(19) -#define KVASER_PCIEFD_KCAN_STAT_BUS_OFF_MSK (KVASER_PCIEFD_KCAN_STAT_AR | \ - KVASER_PCIEFD_KCAN_STAT_BOFF | KVASER_PCIEFD_KCAN_STAT_RMR | \ - KVASER_PCIEFD_KCAN_STAT_IRM) +/* Controller got one-shot capability */ +#define KVASER_PCIEFD_KCAN_STAT_CAP BIT(16) +/* Controller in reset mode */ +#define KVASER_PCIEFD_KCAN_STAT_IRM BIT(15) +/* Reset mode request */ +#define KVASER_PCIEFD_KCAN_STAT_RMR BIT(14) +/* Bus off */ +#define KVASER_PCIEFD_KCAN_STAT_BOFF BIT(11) +/* Idle state. Controller in reset mode and no abort or flush pending */ +#define KVASER_PCIEFD_KCAN_STAT_IDLE BIT(10) +/* Abort request */ +#define KVASER_PCIEFD_KCAN_STAT_AR BIT(7) +/* Controller is bus off */ +#define KVASER_PCIEFD_KCAN_STAT_BUS_OFF_MASK \ + (KVASER_PCIEFD_KCAN_STAT_AR | KVASER_PCIEFD_KCAN_STAT_BOFF | \ + KVASER_PCIEFD_KCAN_STAT_RMR | KVASER_PCIEFD_KCAN_STAT_IRM) -/* Reset mode */ -#define KVASER_PCIEFD_KCAN_MODE_RM BIT(8) -/* Listen only mode */ -#define KVASER_PCIEFD_KCAN_MODE_LOM BIT(9) -/* Error packet enable */ -#define KVASER_PCIEFD_KCAN_MODE_EPEN BIT(12) -/* CAN FD non-ISO */ -#define KVASER_PCIEFD_KCAN_MODE_NIFDEN BIT(15) -/* Acknowledgment packet type */ -#define KVASER_PCIEFD_KCAN_MODE_APT BIT(20) -/* Active error flag enable. Clear to force error passive */ -#define KVASER_PCIEFD_KCAN_MODE_EEN BIT(23) /* Classic CAN mode */ #define KVASER_PCIEFD_KCAN_MODE_CCM BIT(31) +/* Active error flag enable. Clear to force error passive */ +#define KVASER_PCIEFD_KCAN_MODE_EEN BIT(23) +/* Acknowledgment packet type */ +#define KVASER_PCIEFD_KCAN_MODE_APT BIT(20) +/* CAN FD non-ISO */ +#define KVASER_PCIEFD_KCAN_MODE_NIFDEN BIT(15) +/* Error packet enable */ +#define KVASER_PCIEFD_KCAN_MODE_EPEN BIT(12) +/* Listen only mode */ +#define KVASER_PCIEFD_KCAN_MODE_LOM BIT(9) +/* Reset mode */ +#define KVASER_PCIEFD_KCAN_MODE_RM BIT(8) -#define KVASER_PCIEFD_KCAN_BTRN_SJW_SHIFT 13 -#define KVASER_PCIEFD_KCAN_BTRN_TSEG1_SHIFT 17 -#define KVASER_PCIEFD_KCAN_BTRN_TSEG2_SHIFT 26 - -#define KVASER_PCIEFD_KCAN_PWM_TOP_SHIFT 16 - -/* Kvaser KCAN packet types */ -#define KVASER_PCIEFD_PACK_TYPE_DATA 0 -#define KVASER_PCIEFD_PACK_TYPE_ACK 1 -#define KVASER_PCIEFD_PACK_TYPE_TXRQ 2 -#define KVASER_PCIEFD_PACK_TYPE_ERROR 3 -#define KVASER_PCIEFD_PACK_TYPE_EFLUSH_ACK 4 -#define KVASER_PCIEFD_PACK_TYPE_EFRAME_ACK 5 -#define KVASER_PCIEFD_PACK_TYPE_ACK_DATA 6 -#define KVASER_PCIEFD_PACK_TYPE_STATUS 8 -#define KVASER_PCIEFD_PACK_TYPE_BUS_LOAD 9 - -/* Kvaser KCAN packet common definitions */ -#define KVASER_PCIEFD_PACKET_SEQ_MSK 0xff -#define KVASER_PCIEFD_PACKET_CHID_SHIFT 25 -#define KVASER_PCIEFD_PACKET_TYPE_SHIFT 28 - -/* Kvaser KCAN TDATA and RDATA first word */ +/* BTRN and BTRD fields */ +#define KVASER_PCIEFD_KCAN_BTRN_TSEG2_MASK GENMASK(30, 26) +#define KVASER_PCIEFD_KCAN_BTRN_TSEG1_MASK GENMASK(25, 17) +#define KVASER_PCIEFD_KCAN_BTRN_SJW_MASK GENMASK(16, 13) +#define KVASER_PCIEFD_KCAN_BTRN_BRP_MASK GENMASK(12, 0) + +/* PWM Control fields */ +#define KVASER_PCIEFD_KCAN_PWM_TOP_MASK GENMASK(23, 16) +#define KVASER_PCIEFD_KCAN_PWM_TRIGGER_MASK GENMASK(7, 0) + +/* KCAN packet type IDs */ +#define KVASER_PCIEFD_PACK_TYPE_DATA 0x0 +#define KVASER_PCIEFD_PACK_TYPE_ACK 0x1 +#define KVASER_PCIEFD_PACK_TYPE_TXRQ 0x2 +#define KVASER_PCIEFD_PACK_TYPE_ERROR 0x3 +#define KVASER_PCIEFD_PACK_TYPE_EFLUSH_ACK 0x4 +#define KVASER_PCIEFD_PACK_TYPE_EFRAME_ACK 0x5 +#define KVASER_PCIEFD_PACK_TYPE_ACK_DATA 0x6 +#define KVASER_PCIEFD_PACK_TYPE_STATUS 0x8 +#define KVASER_PCIEFD_PACK_TYPE_BUS_LOAD 0x9 + +/* Common KCAN packet definitions, second word */ +#define KVASER_PCIEFD_PACKET_TYPE_MASK GENMASK(31, 28) +#define KVASER_PCIEFD_PACKET_CHID_MASK GENMASK(27, 25) +#define KVASER_PCIEFD_PACKET_SEQ_MASK GENMASK(7, 0) + +/* KCAN Transmit/Receive data packet, first word */ #define KVASER_PCIEFD_RPACKET_IDE BIT(30) #define KVASER_PCIEFD_RPACKET_RTR BIT(29) -/* Kvaser KCAN TDATA and RDATA second word */ -#define KVASER_PCIEFD_RPACKET_ESI BIT(13) -#define KVASER_PCIEFD_RPACKET_BRS BIT(14) -#define KVASER_PCIEFD_RPACKET_FDF BIT(15) -#define KVASER_PCIEFD_RPACKET_DLC_SHIFT 8 -/* Kvaser KCAN TDATA second word */ -#define KVASER_PCIEFD_TPACKET_SMS BIT(16) +#define KVASER_PCIEFD_RPACKET_ID_MASK GENMASK(28, 0) +/* KCAN Transmit data packet, second word */ #define KVASER_PCIEFD_TPACKET_AREQ BIT(31) +#define KVASER_PCIEFD_TPACKET_SMS BIT(16) +/* KCAN Transmit/Receive data packet, second word */ +#define KVASER_PCIEFD_RPACKET_FDF BIT(15) +#define KVASER_PCIEFD_RPACKET_BRS BIT(14) +#define KVASER_PCIEFD_RPACKET_ESI BIT(13) +#define KVASER_PCIEFD_RPACKET_DLC_MASK GENMASK(11, 8) -/* Kvaser KCAN APACKET */ -#define KVASER_PCIEFD_APACKET_FLU BIT(8) -#define KVASER_PCIEFD_APACKET_CT BIT(9) -#define KVASER_PCIEFD_APACKET_ABL BIT(10) +/* KCAN Transmit acknowledge packet, first word */ #define KVASER_PCIEFD_APACKET_NACK BIT(11) +#define KVASER_PCIEFD_APACKET_ABL BIT(10) +#define KVASER_PCIEFD_APACKET_CT BIT(9) +#define KVASER_PCIEFD_APACKET_FLU BIT(8) -/* Kvaser KCAN SPACK first word */ -#define KVASER_PCIEFD_SPACK_RXERR_SHIFT 8 -#define KVASER_PCIEFD_SPACK_BOFF BIT(16) -#define KVASER_PCIEFD_SPACK_IDET BIT(20) -#define KVASER_PCIEFD_SPACK_IRM BIT(21) +/* KCAN Status packet, first word */ #define KVASER_PCIEFD_SPACK_RMCD BIT(22) -/* Kvaser KCAN SPACK second word */ -#define KVASER_PCIEFD_SPACK_AUTO BIT(21) -#define KVASER_PCIEFD_SPACK_EWLR BIT(23) +#define KVASER_PCIEFD_SPACK_IRM BIT(21) +#define KVASER_PCIEFD_SPACK_IDET BIT(20) +#define KVASER_PCIEFD_SPACK_BOFF BIT(16) +#define KVASER_PCIEFD_SPACK_RXERR_MASK GENMASK(15, 8) +#define KVASER_PCIEFD_SPACK_TXERR_MASK GENMASK(7, 0) +/* KCAN Status packet, second word */ #define KVASER_PCIEFD_SPACK_EPLR BIT(24) +#define KVASER_PCIEFD_SPACK_EWLR BIT(23) +#define KVASER_PCIEFD_SPACK_AUTO BIT(21) -/* Kvaser KCAN_EPACK second word */ +/* KCAN Error detected packet, second word */ #define KVASER_PCIEFD_EPACK_DIR_TX BIT(0) struct kvaser_pciefd; @@ -306,195 +302,43 @@ static const struct can_bittiming_const kvaser_pciefd_bittiming_const = { .brp_inc = 1, }; -struct kvaser_pciefd_cfg_param { - __le32 magic; - __le32 nr; - __le32 len; - u8 data[KVASER_PCIEFD_CFG_PARAM_MAX_SZ]; -}; - -struct kvaser_pciefd_cfg_img { - __le32 version; - __le32 magic; - __le32 crc; - struct kvaser_pciefd_cfg_param params[KVASER_PCIEFD_CFG_MAX_PARAMS]; -}; - static struct pci_device_id kvaser_pciefd_id_table[] = { - { PCI_DEVICE(KVASER_PCIEFD_VENDOR, KVASER_PCIEFD_4HS_ID), }, - { PCI_DEVICE(KVASER_PCIEFD_VENDOR, KVASER_PCIEFD_2HS_ID), }, - { PCI_DEVICE(KVASER_PCIEFD_VENDOR, KVASER_PCIEFD_HS_ID), }, - { PCI_DEVICE(KVASER_PCIEFD_VENDOR, KVASER_PCIEFD_MINIPCIE_HS_ID), }, - { PCI_DEVICE(KVASER_PCIEFD_VENDOR, KVASER_PCIEFD_MINIPCIE_2HS_ID), }, - { 0,}, + { + PCI_DEVICE(KVASER_PCIEFD_VENDOR, KVASER_PCIEFD_4HS_DEVICE_ID), + }, + { + PCI_DEVICE(KVASER_PCIEFD_VENDOR, KVASER_PCIEFD_2HS_V2_DEVICE_ID), + }, + { + PCI_DEVICE(KVASER_PCIEFD_VENDOR, KVASER_PCIEFD_HS_V2_DEVICE_ID), + }, + { + PCI_DEVICE(KVASER_PCIEFD_VENDOR, KVASER_PCIEFD_MINIPCIE_HS_V2_DEVICE_ID), + }, + { + PCI_DEVICE(KVASER_PCIEFD_VENDOR, KVASER_PCIEFD_MINIPCIE_2HS_V2_DEVICE_ID), + }, + { + 0, + }, }; MODULE_DEVICE_TABLE(pci, kvaser_pciefd_id_table); -/* Onboard flash memory functions */ -static int kvaser_pciefd_spi_wait_loop(struct kvaser_pciefd *pcie, int msk) -{ - u32 res; - - return readl_poll_timeout(pcie->reg_base + KVASER_PCIEFD_SPI_STATUS_REG, - res, res & msk, 0, 10); -} - -static int kvaser_pciefd_spi_cmd(struct kvaser_pciefd *pcie, const u8 *tx, - u32 tx_len, u8 *rx, u32 rx_len) -{ - int c; - - iowrite32(BIT(0), pcie->reg_base + KVASER_PCIEFD_SPI_SSEL_REG); - iowrite32(BIT(10), pcie->reg_base + KVASER_PCIEFD_SPI_CTRL_REG); - ioread32(pcie->reg_base + KVASER_PCIEFD_SPI_RX_REG); - - c = tx_len; - while (c--) { - if (kvaser_pciefd_spi_wait_loop(pcie, KVASER_PCIEFD_SPI_TRDY)) - return -EIO; - - iowrite32(*tx++, pcie->reg_base + KVASER_PCIEFD_SPI_TX_REG); - - if (kvaser_pciefd_spi_wait_loop(pcie, KVASER_PCIEFD_SPI_RRDY)) - return -EIO; - - ioread32(pcie->reg_base + KVASER_PCIEFD_SPI_RX_REG); - } - - c = rx_len; - while (c-- > 0) { - if (kvaser_pciefd_spi_wait_loop(pcie, KVASER_PCIEFD_SPI_TRDY)) - return -EIO; - - iowrite32(0, pcie->reg_base + KVASER_PCIEFD_SPI_TX_REG); - - if (kvaser_pciefd_spi_wait_loop(pcie, KVASER_PCIEFD_SPI_RRDY)) - return -EIO; - - *rx++ = ioread32(pcie->reg_base + KVASER_PCIEFD_SPI_RX_REG); - } - - if (kvaser_pciefd_spi_wait_loop(pcie, KVASER_PCIEFD_SPI_TMT)) - return -EIO; - - iowrite32(0, pcie->reg_base + KVASER_PCIEFD_SPI_CTRL_REG); - - if (c != -1) { - dev_err(&pcie->pci->dev, "Flash SPI transfer failed\n"); - return -EIO; - } - - return 0; -} - -static int kvaser_pciefd_cfg_read_and_verify(struct kvaser_pciefd *pcie, - struct kvaser_pciefd_cfg_img *img) -{ - int offset = KVASER_PCIEFD_CFG_IMG_OFFSET; - int res, crc; - u8 *crc_buff; - - u8 cmd[] = { - KVASER_PCIEFD_FLASH_READ_CMD, - (u8)((offset >> 16) & 0xff), - (u8)((offset >> 8) & 0xff), - (u8)(offset & 0xff) - }; - - res = kvaser_pciefd_spi_cmd(pcie, cmd, ARRAY_SIZE(cmd), (u8 *)img, - KVASER_PCIEFD_CFG_IMG_SZ); - if (res) - return res; - - crc_buff = (u8 *)img->params; - - if (le32_to_cpu(img->version) != KVASER_PCIEFD_CFG_SYS_VER) { - dev_err(&pcie->pci->dev, - "Config flash corrupted, version number is wrong\n"); - return -ENODEV; - } - - if (le32_to_cpu(img->magic) != KVASER_PCIEFD_CFG_MAGIC) { - dev_err(&pcie->pci->dev, - "Config flash corrupted, magic number is wrong\n"); - return -ENODEV; - } - - crc = ~crc32_be(0xffffffff, crc_buff, sizeof(img->params)); - if (le32_to_cpu(img->crc) != crc) { - dev_err(&pcie->pci->dev, - "Stored CRC does not match flash image contents\n"); - return -EIO; - } - - return 0; -} - -static void kvaser_pciefd_cfg_read_params(struct kvaser_pciefd *pcie, - struct kvaser_pciefd_cfg_img *img) +static inline void kvaser_pciefd_send_kcan_cmd(struct kvaser_pciefd_can *can, u32 cmd) { - struct kvaser_pciefd_cfg_param *param; - - param = &img->params[KVASER_PCIEFD_CFG_PARAM_NR_CHAN]; - memcpy(&pcie->nr_channels, param->data, le32_to_cpu(param->len)); + iowrite32(FIELD_PREP(KVASER_PCIEFD_KCAN_CMD_MASK, cmd) | + FIELD_PREP(KVASER_PCIEFD_KCAN_CMD_SEQ_MASK, ++can->cmd_seq), + can->reg_base + KVASER_PCIEFD_KCAN_CMD_REG); } -static int kvaser_pciefd_read_cfg(struct kvaser_pciefd *pcie) +static inline void kvaser_pciefd_request_status(struct kvaser_pciefd_can *can) { - int res; - struct kvaser_pciefd_cfg_img *img; - - /* Read electronic signature */ - u8 cmd[] = {KVASER_PCIEFD_FLASH_RES_CMD, 0, 0, 0}; - - res = kvaser_pciefd_spi_cmd(pcie, cmd, ARRAY_SIZE(cmd), cmd, 1); - if (res) - return -EIO; - - img = kmalloc(KVASER_PCIEFD_CFG_IMG_SZ, GFP_KERNEL); - if (!img) - return -ENOMEM; - - if (cmd[0] != KVASER_PCIEFD_FLASH_ID_EPCS16) { - dev_err(&pcie->pci->dev, - "Flash id is 0x%x instead of expected EPCS16 (0x%x)\n", - cmd[0], KVASER_PCIEFD_FLASH_ID_EPCS16); - - res = -ENODEV; - goto image_free; - } - - cmd[0] = KVASER_PCIEFD_FLASH_STATUS_CMD; - res = kvaser_pciefd_spi_cmd(pcie, cmd, 1, cmd, 1); - if (res) { - goto image_free; - } else if (cmd[0] & 1) { - res = -EIO; - /* No write is ever done, the WIP should never be set */ - dev_err(&pcie->pci->dev, "Unexpected WIP bit set in flash\n"); - goto image_free; - } - - res = kvaser_pciefd_cfg_read_and_verify(pcie, img); - if (res) { - res = -EIO; - goto image_free; - } - - kvaser_pciefd_cfg_read_params(pcie, img); - -image_free: - kfree(img); - return res; + kvaser_pciefd_send_kcan_cmd(can, KVASER_PCIEFD_KCAN_CMD_SRQ); } -static void kvaser_pciefd_request_status(struct kvaser_pciefd_can *can) +static inline void kvaser_pciefd_abort_flush_reset(struct kvaser_pciefd_can *can) { - u32 cmd; - - cmd = KVASER_PCIEFD_KCAN_CMD_SRQ; - cmd |= ++can->cmd_seq << KVASER_PCIEFD_KCAN_CMD_SEQ_SHIFT; - iowrite32(cmd, can->reg_base + KVASER_PCIEFD_KCAN_CMD_REG); + kvaser_pciefd_send_kcan_cmd(can, KVASER_PCIEFD_KCAN_CMD_AT); } static void kvaser_pciefd_enable_err_gen(struct kvaser_pciefd_can *can) @@ -523,7 +367,7 @@ static void kvaser_pciefd_disable_err_gen(struct kvaser_pciefd_can *can) spin_unlock_irqrestore(&can->lock, irq); } -static int kvaser_pciefd_set_tx_irq(struct kvaser_pciefd_can *can) +static void kvaser_pciefd_set_tx_irq(struct kvaser_pciefd_can *can) { u32 msk; @@ -534,8 +378,13 @@ static int kvaser_pciefd_set_tx_irq(struct kvaser_pciefd_can *can) KVASER_PCIEFD_KCAN_IRQ_TAR; iowrite32(msk, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); +} - return 0; +static inline void kvaser_pciefd_set_skb_timestamp(const struct kvaser_pciefd *pcie, + struct sk_buff *skb, u64 timestamp) +{ + skb_hwtstamps(skb)->hwtstamp = + ns_to_ktime(div_u64(timestamp * 1000, pcie->freq_to_ticks_div)); } static void kvaser_pciefd_setup_controller(struct kvaser_pciefd_can *can) @@ -544,7 +393,6 @@ static void kvaser_pciefd_setup_controller(struct kvaser_pciefd_can *can) unsigned long irq; spin_lock_irqsave(&can->lock, irq); - mode = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_MODE_REG); if (can->can.ctrlmode & CAN_CTRLMODE_FD) { mode &= ~KVASER_PCIEFD_KCAN_MODE_CCM; @@ -561,7 +409,6 @@ static void kvaser_pciefd_setup_controller(struct kvaser_pciefd_can *can) mode |= KVASER_PCIEFD_KCAN_MODE_LOM; else mode &= ~KVASER_PCIEFD_KCAN_MODE_LOM; - mode |= KVASER_PCIEFD_KCAN_MODE_EEN; mode |= KVASER_PCIEFD_KCAN_MODE_EPEN; /* Use ACK packet type */ @@ -578,18 +425,13 @@ static void kvaser_pciefd_start_controller_flush(struct kvaser_pciefd_can *can) unsigned long irq; spin_lock_irqsave(&can->lock, irq); - iowrite32(-1, can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); + iowrite32(GENMASK(31, 0), can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); iowrite32(KVASER_PCIEFD_KCAN_IRQ_ABD, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); - status = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_STAT_REG); if (status & KVASER_PCIEFD_KCAN_STAT_IDLE) { - u32 cmd; - /* If controller is already idle, run abort, flush and reset */ - cmd = KVASER_PCIEFD_KCAN_CMD_AT; - cmd |= ++can->cmd_seq << KVASER_PCIEFD_KCAN_CMD_SEQ_SHIFT; - iowrite32(cmd, can->reg_base + KVASER_PCIEFD_KCAN_CMD_REG); + kvaser_pciefd_abort_flush_reset(can); } else if (!(status & KVASER_PCIEFD_KCAN_STAT_RMR)) { u32 mode; @@ -598,7 +440,6 @@ static void kvaser_pciefd_start_controller_flush(struct kvaser_pciefd_can *can) mode |= KVASER_PCIEFD_KCAN_MODE_RM; iowrite32(mode, can->reg_base + KVASER_PCIEFD_KCAN_MODE_REG); } - spin_unlock_irqrestore(&can->lock, irq); } @@ -608,7 +449,6 @@ static int kvaser_pciefd_bus_on(struct kvaser_pciefd_can *can) unsigned long irq; del_timer(&can->bec_poll_timer); - if (!completion_done(&can->flush_comp)) kvaser_pciefd_start_controller_flush(can); @@ -620,11 +460,9 @@ static int kvaser_pciefd_bus_on(struct kvaser_pciefd_can *can) spin_lock_irqsave(&can->lock, irq); iowrite32(0, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); - iowrite32(-1, can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); - + iowrite32(GENMASK(31, 0), can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); iowrite32(KVASER_PCIEFD_KCAN_IRQ_ABD, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); - mode = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_MODE_REG); mode &= ~KVASER_PCIEFD_KCAN_MODE_RM; iowrite32(mode, can->reg_base + KVASER_PCIEFD_KCAN_MODE_REG); @@ -637,11 +475,10 @@ static int kvaser_pciefd_bus_on(struct kvaser_pciefd_can *can) } /* Reset interrupt handling */ iowrite32(0, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); - iowrite32(-1, can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); + iowrite32(GENMASK(31, 0), can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); kvaser_pciefd_set_tx_irq(can); kvaser_pciefd_setup_controller(can); - can->can.state = CAN_STATE_ERROR_ACTIVE; netif_wake_queue(can->can.dev); can->bec.txerr = 0; @@ -659,10 +496,9 @@ static void kvaser_pciefd_pwm_stop(struct kvaser_pciefd_can *can) spin_lock_irqsave(&can->lock, irq); pwm_ctrl = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_PWM_REG); - top = (pwm_ctrl >> KVASER_PCIEFD_KCAN_PWM_TOP_SHIFT) & 0xff; - + top = FIELD_GET(KVASER_PCIEFD_KCAN_PWM_TOP_MASK, pwm_ctrl); /* Set duty cycle to zero */ - pwm_ctrl |= top; + pwm_ctrl |= FIELD_PREP(KVASER_PCIEFD_KCAN_PWM_TRIGGER_MASK, top); iowrite32(pwm_ctrl, can->reg_base + KVASER_PCIEFD_KCAN_PWM_REG); spin_unlock_irqrestore(&can->lock, irq); } @@ -675,18 +511,17 @@ static void kvaser_pciefd_pwm_start(struct kvaser_pciefd_can *can) kvaser_pciefd_pwm_stop(can); spin_lock_irqsave(&can->lock, irq); - - /* Set frequency to 500 KHz*/ + /* Set frequency to 500 KHz */ top = can->kv_pcie->bus_freq / (2 * 500000) - 1; - pwm_ctrl = top & 0xff; - pwm_ctrl |= (top & 0xff) << KVASER_PCIEFD_KCAN_PWM_TOP_SHIFT; + pwm_ctrl = FIELD_PREP(KVASER_PCIEFD_KCAN_PWM_TRIGGER_MASK, top); + pwm_ctrl |= FIELD_PREP(KVASER_PCIEFD_KCAN_PWM_TOP_MASK, top); iowrite32(pwm_ctrl, can->reg_base + KVASER_PCIEFD_KCAN_PWM_REG); /* Set duty cycle to 95 */ trigger = (100 * top - 95 * (top + 1) + 50) / 100; - pwm_ctrl = trigger & 0xff; - pwm_ctrl |= (top & 0xff) << KVASER_PCIEFD_KCAN_PWM_TOP_SHIFT; + pwm_ctrl = FIELD_PREP(KVASER_PCIEFD_KCAN_PWM_TRIGGER_MASK, trigger); + pwm_ctrl |= FIELD_PREP(KVASER_PCIEFD_KCAN_PWM_TOP_MASK, top); iowrite32(pwm_ctrl, can->reg_base + KVASER_PCIEFD_KCAN_PWM_REG); spin_unlock_irqrestore(&can->lock, irq); } @@ -741,7 +576,6 @@ static int kvaser_pciefd_prepare_tx_packet(struct kvaser_pciefd_tx_packet *p, int seq = can->echo_idx; memset(p, 0, sizeof(*p)); - if (can->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT) p->header[1] |= KVASER_PCIEFD_TPACKET_SMS; @@ -751,19 +585,24 @@ static int kvaser_pciefd_prepare_tx_packet(struct kvaser_pciefd_tx_packet *p, if (cf->can_id & CAN_EFF_FLAG) p->header[0] |= KVASER_PCIEFD_RPACKET_IDE; - p->header[0] |= cf->can_id & CAN_EFF_MASK; - p->header[1] |= can_fd_len2dlc(cf->len) << KVASER_PCIEFD_RPACKET_DLC_SHIFT; + p->header[0] |= FIELD_PREP(KVASER_PCIEFD_RPACKET_ID_MASK, cf->can_id); p->header[1] |= KVASER_PCIEFD_TPACKET_AREQ; if (can_is_canfd_skb(skb)) { + p->header[1] |= FIELD_PREP(KVASER_PCIEFD_RPACKET_DLC_MASK, + can_fd_len2dlc(cf->len)); p->header[1] |= KVASER_PCIEFD_RPACKET_FDF; if (cf->flags & CANFD_BRS) p->header[1] |= KVASER_PCIEFD_RPACKET_BRS; if (cf->flags & CANFD_ESI) p->header[1] |= KVASER_PCIEFD_RPACKET_ESI; + } else { + p->header[1] |= + FIELD_PREP(KVASER_PCIEFD_RPACKET_DLC_MASK, + can_get_cc_dlc((struct can_frame *)cf, can->can.ctrlmode)); } - p->header[1] |= seq & KVASER_PCIEFD_PACKET_SEQ_MSK; + p->header[1] |= FIELD_PREP(KVASER_PCIEFD_PACKET_SEQ_MASK, seq); packet_size = cf->len; memcpy(p->data, cf->data, packet_size); @@ -777,16 +616,15 @@ static netdev_tx_t kvaser_pciefd_start_xmit(struct sk_buff *skb, struct kvaser_pciefd_can *can = netdev_priv(netdev); unsigned long irq_flags; struct kvaser_pciefd_tx_packet packet; - int nwords; + int nr_words; u8 count; if (can_dev_dropped_skb(netdev, skb)) return NETDEV_TX_OK; - nwords = kvaser_pciefd_prepare_tx_packet(&packet, can, skb); + nr_words = kvaser_pciefd_prepare_tx_packet(&packet, can, skb); spin_lock_irqsave(&can->echo_lock, irq_flags); - /* Prepare and save echo skb in internal slot */ can_put_echo_skb(skb, netdev, can->echo_idx, 0); @@ -799,13 +637,13 @@ static netdev_tx_t kvaser_pciefd_start_xmit(struct sk_buff *skb, iowrite32(packet.header[1], can->reg_base + KVASER_PCIEFD_KCAN_FIFO_REG); - if (nwords) { - u32 data_last = ((u32 *)packet.data)[nwords - 1]; + if (nr_words) { + u32 data_last = ((u32 *)packet.data)[nr_words - 1]; /* Write data to fifo, except last word */ iowrite32_rep(can->reg_base + KVASER_PCIEFD_KCAN_FIFO_REG, packet.data, - nwords - 1); + nr_words - 1); /* Write last word to end of fifo */ __raw_writel(data_last, can->reg_base + KVASER_PCIEFD_KCAN_FIFO_LAST_REG); @@ -815,14 +653,13 @@ static netdev_tx_t kvaser_pciefd_start_xmit(struct sk_buff *skb, KVASER_PCIEFD_KCAN_FIFO_LAST_REG); } - count = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NPACKETS_REG); + count = FIELD_GET(KVASER_PCIEFD_KCAN_TX_NR_PACKETS_CURRENT_MASK, + ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NR_PACKETS_REG)); /* No room for a new message, stop the queue until at least one * successful transmit */ - if (count >= KVASER_PCIEFD_CAN_TX_MAX_COUNT || - can->can.echo_skb[can->echo_idx]) + if (count >= can->can.echo_skb_max || can->can.echo_skb[can->echo_idx]) netif_stop_queue(netdev); - spin_unlock_irqrestore(&can->echo_lock, irq_flags); return NETDEV_TX_OK; @@ -840,25 +677,20 @@ static int kvaser_pciefd_set_bittiming(struct kvaser_pciefd_can *can, bool data) else bt = &can->can.bittiming; - btrn = ((bt->phase_seg2 - 1) & 0x1f) << - KVASER_PCIEFD_KCAN_BTRN_TSEG2_SHIFT | - (((bt->prop_seg + bt->phase_seg1) - 1) & 0x1ff) << - KVASER_PCIEFD_KCAN_BTRN_TSEG1_SHIFT | - ((bt->sjw - 1) & 0xf) << KVASER_PCIEFD_KCAN_BTRN_SJW_SHIFT | - ((bt->brp - 1) & 0x1fff); + btrn = FIELD_PREP(KVASER_PCIEFD_KCAN_BTRN_TSEG2_MASK, bt->phase_seg2 - 1) | + FIELD_PREP(KVASER_PCIEFD_KCAN_BTRN_TSEG1_MASK, bt->prop_seg + bt->phase_seg1 - 1) | + FIELD_PREP(KVASER_PCIEFD_KCAN_BTRN_SJW_MASK, bt->sjw - 1) | + FIELD_PREP(KVASER_PCIEFD_KCAN_BTRN_BRP_MASK, bt->brp - 1); spin_lock_irqsave(&can->lock, irq_flags); mode = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_MODE_REG); - /* Put the circuit in reset mode */ iowrite32(mode | KVASER_PCIEFD_KCAN_MODE_RM, can->reg_base + KVASER_PCIEFD_KCAN_MODE_REG); /* Can only set bittiming if in reset mode */ ret = readl_poll_timeout(can->reg_base + KVASER_PCIEFD_KCAN_MODE_REG, - test, test & KVASER_PCIEFD_KCAN_MODE_RM, - 0, 10); - + test, test & KVASER_PCIEFD_KCAN_MODE_RM, 0, 10); if (ret) { spin_unlock_irqrestore(&can->lock, irq_flags); return -EBUSY; @@ -868,11 +700,10 @@ static int kvaser_pciefd_set_bittiming(struct kvaser_pciefd_can *can, bool data) iowrite32(btrn, can->reg_base + KVASER_PCIEFD_KCAN_BTRD_REG); else iowrite32(btrn, can->reg_base + KVASER_PCIEFD_KCAN_BTRN_REG); - /* Restore previous reset mode status */ iowrite32(mode, can->reg_base + KVASER_PCIEFD_KCAN_MODE_REG); - spin_unlock_irqrestore(&can->lock, irq_flags); + return 0; } @@ -910,6 +741,7 @@ static int kvaser_pciefd_get_berr_counter(const struct net_device *ndev, bec->rxerr = can->bec.rxerr; bec->txerr = can->bec.txerr; + return 0; } @@ -941,7 +773,7 @@ static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie) for (i = 0; i < pcie->nr_channels; i++) { struct net_device *netdev; struct kvaser_pciefd_can *can; - u32 status, tx_npackets; + u32 status, tx_nr_packets_max; netdev = alloc_candev(sizeof(struct kvaser_pciefd_can), KVASER_PCIEFD_CAN_TX_MAX_COUNT); @@ -953,7 +785,6 @@ static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie) netdev->ethtool_ops = &kvaser_pciefd_ethtool_ops; can->reg_base = pcie->reg_base + KVASER_PCIEFD_KCAN0_BASE + i * KVASER_PCIEFD_KCAN_BASE_OFFSET; - can->kv_pcie = pcie; can->cmd_seq = 0; can->err_rep_cnt = 0; @@ -962,41 +793,31 @@ static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie) init_completion(&can->start_comp); init_completion(&can->flush_comp); - timer_setup(&can->bec_poll_timer, kvaser_pciefd_bec_poll_timer, - 0); + timer_setup(&can->bec_poll_timer, kvaser_pciefd_bec_poll_timer, 0); /* Disable Bus load reporting */ iowrite32(0, can->reg_base + KVASER_PCIEFD_KCAN_BUS_LOAD_REG); - tx_npackets = ioread32(can->reg_base + - KVASER_PCIEFD_KCAN_TX_NPACKETS_REG); - if (((tx_npackets >> KVASER_PCIEFD_KCAN_TX_NPACKETS_MAX_SHIFT) & - 0xff) < KVASER_PCIEFD_CAN_TX_MAX_COUNT) { - dev_err(&pcie->pci->dev, - "Max Tx count is smaller than expected\n"); - - free_candev(netdev); - return -ENODEV; - } + tx_nr_packets_max = + FIELD_GET(KVASER_PCIEFD_KCAN_TX_NR_PACKETS_MAX_MASK, + ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NR_PACKETS_REG)); can->can.clock.freq = pcie->freq; - can->can.echo_skb_max = KVASER_PCIEFD_CAN_TX_MAX_COUNT; + can->can.echo_skb_max = min(KVASER_PCIEFD_CAN_TX_MAX_COUNT, tx_nr_packets_max - 1); can->echo_idx = 0; spin_lock_init(&can->echo_lock); spin_lock_init(&can->lock); + can->can.bittiming_const = &kvaser_pciefd_bittiming_const; can->can.data_bittiming_const = &kvaser_pciefd_bittiming_const; - can->can.do_set_bittiming = kvaser_pciefd_set_nominal_bittiming; - can->can.do_set_data_bittiming = - kvaser_pciefd_set_data_bittiming; - + can->can.do_set_data_bittiming = kvaser_pciefd_set_data_bittiming; can->can.do_set_mode = kvaser_pciefd_set_mode; can->can.do_get_berr_counter = kvaser_pciefd_get_berr_counter; - can->can.ctrlmode_supported = CAN_CTRLMODE_LISTENONLY | CAN_CTRLMODE_FD | - CAN_CTRLMODE_FD_NON_ISO; + CAN_CTRLMODE_FD_NON_ISO | + CAN_CTRLMODE_CC_LEN8_DLC; status = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_STAT_REG); if (!(status & KVASER_PCIEFD_KCAN_STAT_FD)) { @@ -1011,10 +832,9 @@ static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie) can->can.ctrlmode_supported |= CAN_CTRLMODE_ONE_SHOT; netdev->flags |= IFF_ECHO; - SET_NETDEV_DEV(netdev, &pcie->pci->dev); - iowrite32(-1, can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); + iowrite32(GENMASK(31, 0), can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); iowrite32(KVASER_PCIEFD_KCAN_IRQ_ABD, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); @@ -1073,18 +893,16 @@ static int kvaser_pciefd_setup_dma(struct kvaser_pciefd *pcie) for (i = 0; i < KVASER_PCIEFD_DMA_COUNT; i++) { unsigned int offset = KVASER_PCIEFD_DMA_MAP_BASE + 8 * i; - pcie->dma_data[i] = - dmam_alloc_coherent(&pcie->pci->dev, - KVASER_PCIEFD_DMA_SIZE, - &dma_addr[i], - GFP_KERNEL); + pcie->dma_data[i] = dmam_alloc_coherent(&pcie->pci->dev, + KVASER_PCIEFD_DMA_SIZE, + &dma_addr[i], + GFP_KERNEL); if (!pcie->dma_data[i] || !dma_addr[i]) { dev_err(&pcie->pci->dev, "Rx dma_alloc(%u) failure\n", KVASER_PCIEFD_DMA_SIZE); return -ENOMEM; } - kvaser_pciefd_write_dma_map(pcie, dma_addr[i], offset); } @@ -1092,10 +910,10 @@ static int kvaser_pciefd_setup_dma(struct kvaser_pciefd *pcie) iowrite32(KVASER_PCIEFD_SRB_CMD_FOR | KVASER_PCIEFD_SRB_CMD_RDB0 | KVASER_PCIEFD_SRB_CMD_RDB1, pcie->reg_base + KVASER_PCIEFD_SRB_CMD_REG); - /* Empty Rx FIFO */ - srb_packet_count = ioread32(pcie->reg_base + KVASER_PCIEFD_SRB_RX_NR_PACKETS_REG) & - KVASER_PCIEFD_SRB_RX_NR_PACKETS_MASK; + srb_packet_count = + FIELD_GET(KVASER_PCIEFD_SRB_RX_NR_PACKETS_MASK, + ioread32(pcie->reg_base + KVASER_PCIEFD_SRB_RX_NR_PACKETS_REG)); while (srb_packet_count) { /* Drop current packet in FIFO */ ioread32(pcie->reg_base + KVASER_PCIEFD_SRB_FIFO_LAST_REG); @@ -1117,37 +935,21 @@ static int kvaser_pciefd_setup_dma(struct kvaser_pciefd *pcie) static int kvaser_pciefd_setup_board(struct kvaser_pciefd *pcie) { - u32 sysid, srb_status, build; - u8 sysid_nr_chan; - int ret; - - ret = kvaser_pciefd_read_cfg(pcie); - if (ret) - return ret; - - sysid = ioread32(pcie->reg_base + KVASER_PCIEFD_SYSID_VERSION_REG); - sysid_nr_chan = (sysid >> KVASER_PCIEFD_SYSID_NRCHAN_SHIFT) & 0xff; - if (pcie->nr_channels != sysid_nr_chan) { - dev_err(&pcie->pci->dev, - "Number of channels does not match: %u vs %u\n", - pcie->nr_channels, - sysid_nr_chan); - return -ENODEV; - } + u32 version, srb_status, build; - if (pcie->nr_channels > KVASER_PCIEFD_MAX_CAN_CHANNELS) - pcie->nr_channels = KVASER_PCIEFD_MAX_CAN_CHANNELS; + version = ioread32(pcie->reg_base + KVASER_PCIEFD_SYSID_VERSION_REG); + pcie->nr_channels = min(KVASER_PCIEFD_MAX_CAN_CHANNELS, + FIELD_GET(KVASER_PCIEFD_SYSID_VERSION_NR_CHAN_MASK, version)); build = ioread32(pcie->reg_base + KVASER_PCIEFD_SYSID_BUILD_REG); - dev_dbg(&pcie->pci->dev, "Version %u.%u.%u\n", - (sysid >> KVASER_PCIEFD_SYSID_MAJOR_VER_SHIFT) & 0xff, - sysid & 0xff, - (build >> KVASER_PCIEFD_SYSID_BUILD_VER_SHIFT) & 0x7fff); + dev_dbg(&pcie->pci->dev, "Version %lu.%lu.%lu\n", + FIELD_GET(KVASER_PCIEFD_SYSID_VERSION_MAJOR_MASK, version), + FIELD_GET(KVASER_PCIEFD_SYSID_VERSION_MINOR_MASK, version), + FIELD_GET(KVASER_PCIEFD_SYSID_BUILD_SEQ_MASK, build)); srb_status = ioread32(pcie->reg_base + KVASER_PCIEFD_SRB_STAT_REG); if (!(srb_status & KVASER_PCIEFD_SRB_STAT_DMA)) { - dev_err(&pcie->pci->dev, - "Hardware without DMA is not supported\n"); + dev_err(&pcie->pci->dev, "Hardware without DMA is not supported\n"); return -ENODEV; } @@ -1157,10 +959,10 @@ static int kvaser_pciefd_setup_board(struct kvaser_pciefd *pcie) pcie->freq_to_ticks_div = pcie->freq / 1000000; if (pcie->freq_to_ticks_div == 0) pcie->freq_to_ticks_div = 1; - /* Turn off all loopback functionality */ iowrite32(0, pcie->reg_base + KVASER_PCIEFD_LOOP_REG); - return ret; + + return 0; } static int kvaser_pciefd_handle_data_packet(struct kvaser_pciefd *pcie, @@ -1170,56 +972,48 @@ static int kvaser_pciefd_handle_data_packet(struct kvaser_pciefd *pcie, struct sk_buff *skb; struct canfd_frame *cf; struct can_priv *priv; - struct net_device_stats *stats; - struct skb_shared_hwtstamps *shhwtstamps; - u8 ch_id = (p->header[1] >> KVASER_PCIEFD_PACKET_CHID_SHIFT) & 0x7; + u8 ch_id = FIELD_GET(KVASER_PCIEFD_PACKET_CHID_MASK, p->header[1]); + u8 dlc; if (ch_id >= pcie->nr_channels) return -EIO; priv = &pcie->can[ch_id]->can; - stats = &priv->dev->stats; + dlc = FIELD_GET(KVASER_PCIEFD_RPACKET_DLC_MASK, p->header[1]); if (p->header[1] & KVASER_PCIEFD_RPACKET_FDF) { skb = alloc_canfd_skb(priv->dev, &cf); if (!skb) { - stats->rx_dropped++; + priv->dev->stats.rx_dropped++; return -ENOMEM; } + cf->len = can_fd_dlc2len(dlc); if (p->header[1] & KVASER_PCIEFD_RPACKET_BRS) cf->flags |= CANFD_BRS; - if (p->header[1] & KVASER_PCIEFD_RPACKET_ESI) cf->flags |= CANFD_ESI; } else { skb = alloc_can_skb(priv->dev, (struct can_frame **)&cf); if (!skb) { - stats->rx_dropped++; + priv->dev->stats.rx_dropped++; return -ENOMEM; } + can_frame_set_cc_len((struct can_frame *)cf, dlc, priv->ctrlmode); } - cf->can_id = p->header[0] & CAN_EFF_MASK; + cf->can_id = FIELD_GET(KVASER_PCIEFD_RPACKET_ID_MASK, p->header[0]); if (p->header[0] & KVASER_PCIEFD_RPACKET_IDE) cf->can_id |= CAN_EFF_FLAG; - cf->len = can_fd_dlc2len(p->header[1] >> KVASER_PCIEFD_RPACKET_DLC_SHIFT); - if (p->header[0] & KVASER_PCIEFD_RPACKET_RTR) { cf->can_id |= CAN_RTR_FLAG; } else { memcpy(cf->data, data, cf->len); - - stats->rx_bytes += cf->len; + priv->dev->stats.rx_bytes += cf->len; } - stats->rx_packets++; - - shhwtstamps = skb_hwtstamps(skb); - - shhwtstamps->hwtstamp = - ns_to_ktime(div_u64(p->timestamp * 1000, - pcie->freq_to_ticks_div)); + priv->dev->stats.rx_packets++; + kvaser_pciefd_set_skb_timestamp(pcie, skb, p->timestamp); return netif_rx(skb); } @@ -1239,7 +1033,6 @@ static void kvaser_pciefd_change_state(struct kvaser_pciefd_can *can, spin_lock_irqsave(&can->lock, irq_flags); netif_stop_queue(can->can.dev); spin_unlock_irqrestore(&can->lock, irq_flags); - /* Prevent CAN controller from auto recover from bus off */ if (!can->can.restart_ms) { kvaser_pciefd_start_controller_flush(can); @@ -1257,7 +1050,7 @@ static void kvaser_pciefd_packet_to_state(struct kvaser_pciefd_rx_packet *p, if (p->header[0] & KVASER_PCIEFD_SPACK_BOFF || p->header[0] & KVASER_PCIEFD_SPACK_IRM) *new_state = CAN_STATE_BUS_OFF; - else if (bec->txerr >= 255 || bec->rxerr >= 255) + else if (bec->txerr >= 255 || bec->rxerr >= 255) *new_state = CAN_STATE_BUS_OFF; else if (p->header[1] & KVASER_PCIEFD_SPACK_EPLR) *new_state = CAN_STATE_ERROR_PASSIVE; @@ -1282,23 +1075,16 @@ static int kvaser_pciefd_rx_error_frame(struct kvaser_pciefd_can *can, struct net_device *ndev = can->can.dev; struct sk_buff *skb; struct can_frame *cf = NULL; - struct skb_shared_hwtstamps *shhwtstamps; - struct net_device_stats *stats = &ndev->stats; old_state = can->can.state; - bec.txerr = p->header[0] & 0xff; - bec.rxerr = (p->header[0] >> KVASER_PCIEFD_SPACK_RXERR_SHIFT) & 0xff; - - kvaser_pciefd_packet_to_state(p, &bec, &new_state, &tx_state, - &rx_state); + bec.txerr = FIELD_GET(KVASER_PCIEFD_SPACK_TXERR_MASK, p->header[0]); + bec.rxerr = FIELD_GET(KVASER_PCIEFD_SPACK_RXERR_MASK, p->header[0]); + kvaser_pciefd_packet_to_state(p, &bec, &new_state, &tx_state, &rx_state); skb = alloc_can_err_skb(ndev, &cf); - if (new_state != old_state) { - kvaser_pciefd_change_state(can, cf, new_state, tx_state, - rx_state); - + kvaser_pciefd_change_state(can, cf, new_state, tx_state, rx_state); if (old_state == CAN_STATE_BUS_OFF && new_state == CAN_STATE_ERROR_ACTIVE && can->can.restart_ms) { @@ -1311,28 +1097,25 @@ static int kvaser_pciefd_rx_error_frame(struct kvaser_pciefd_can *can, can->err_rep_cnt++; can->can.can_stats.bus_error++; if (p->header[1] & KVASER_PCIEFD_EPACK_DIR_TX) - stats->tx_errors++; + ndev->stats.tx_errors++; else - stats->rx_errors++; + ndev->stats.rx_errors++; can->bec.txerr = bec.txerr; can->bec.rxerr = bec.rxerr; if (!skb) { - stats->rx_dropped++; + ndev->stats.rx_dropped++; return -ENOMEM; } - shhwtstamps = skb_hwtstamps(skb); - shhwtstamps->hwtstamp = - ns_to_ktime(div_u64(p->timestamp * 1000, - can->kv_pcie->freq_to_ticks_div)); + kvaser_pciefd_set_skb_timestamp(can->kv_pcie, skb, p->timestamp); cf->can_id |= CAN_ERR_BUSERROR | CAN_ERR_CNT; - cf->data[6] = bec.txerr; cf->data[7] = bec.rxerr; netif_rx(skb); + return 0; } @@ -1340,19 +1123,19 @@ static int kvaser_pciefd_handle_error_packet(struct kvaser_pciefd *pcie, struct kvaser_pciefd_rx_packet *p) { struct kvaser_pciefd_can *can; - u8 ch_id = (p->header[1] >> KVASER_PCIEFD_PACKET_CHID_SHIFT) & 0x7; + u8 ch_id = FIELD_GET(KVASER_PCIEFD_PACKET_CHID_MASK, p->header[1]); if (ch_id >= pcie->nr_channels) return -EIO; can = pcie->can[ch_id]; - kvaser_pciefd_rx_error_frame(can, p); if (can->err_rep_cnt >= KVASER_PCIEFD_MAX_ERR_REP) /* Do not report more errors, until bec_poll_timer expires */ kvaser_pciefd_disable_err_gen(can); /* Start polling the error counters */ mod_timer(&can->bec_poll_timer, KVASER_PCIEFD_BEC_POLL_FREQ); + return 0; } @@ -1364,29 +1147,22 @@ static int kvaser_pciefd_handle_status_resp(struct kvaser_pciefd_can *can, old_state = can->can.state; - bec.txerr = p->header[0] & 0xff; - bec.rxerr = (p->header[0] >> KVASER_PCIEFD_SPACK_RXERR_SHIFT) & 0xff; - - kvaser_pciefd_packet_to_state(p, &bec, &new_state, &tx_state, - &rx_state); + bec.txerr = FIELD_GET(KVASER_PCIEFD_SPACK_TXERR_MASK, p->header[0]); + bec.rxerr = FIELD_GET(KVASER_PCIEFD_SPACK_RXERR_MASK, p->header[0]); + kvaser_pciefd_packet_to_state(p, &bec, &new_state, &tx_state, &rx_state); if (new_state != old_state) { struct net_device *ndev = can->can.dev; struct sk_buff *skb; struct can_frame *cf; - struct skb_shared_hwtstamps *shhwtstamps; skb = alloc_can_err_skb(ndev, &cf); if (!skb) { - struct net_device_stats *stats = &ndev->stats; - - stats->rx_dropped++; + ndev->stats.rx_dropped++; return -ENOMEM; } - kvaser_pciefd_change_state(can, cf, new_state, tx_state, - rx_state); - + kvaser_pciefd_change_state(can, cf, new_state, tx_state, rx_state); if (old_state == CAN_STATE_BUS_OFF && new_state == CAN_STATE_ERROR_ACTIVE && can->can.restart_ms) { @@ -1394,10 +1170,7 @@ static int kvaser_pciefd_handle_status_resp(struct kvaser_pciefd_can *can, cf->can_id |= CAN_ERR_RESTARTED; } - shhwtstamps = skb_hwtstamps(skb); - shhwtstamps->hwtstamp = - ns_to_ktime(div_u64(p->timestamp * 1000, - can->kv_pcie->freq_to_ticks_div)); + kvaser_pciefd_set_skb_timestamp(can->kv_pcie, skb, p->timestamp); cf->data[6] = bec.txerr; cf->data[7] = bec.rxerr; @@ -1419,7 +1192,7 @@ static int kvaser_pciefd_handle_status_packet(struct kvaser_pciefd *pcie, struct kvaser_pciefd_can *can; u8 cmdseq; u32 status; - u8 ch_id = (p->header[1] >> KVASER_PCIEFD_PACKET_CHID_SHIFT) & 0x7; + u8 ch_id = FIELD_GET(KVASER_PCIEFD_PACKET_CHID_MASK, p->header[1]); if (ch_id >= pcie->nr_channels) return -EIO; @@ -1427,43 +1200,40 @@ static int kvaser_pciefd_handle_status_packet(struct kvaser_pciefd *pcie, can = pcie->can[ch_id]; status = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_STAT_REG); - cmdseq = (status >> KVASER_PCIEFD_KCAN_STAT_SEQNO_SHIFT) & 0xff; + cmdseq = FIELD_GET(KVASER_PCIEFD_KCAN_STAT_SEQNO_MASK, status); /* Reset done, start abort and flush */ if (p->header[0] & KVASER_PCIEFD_SPACK_IRM && p->header[0] & KVASER_PCIEFD_SPACK_RMCD && p->header[1] & KVASER_PCIEFD_SPACK_AUTO && - cmdseq == (p->header[1] & KVASER_PCIEFD_PACKET_SEQ_MSK) && + cmdseq == FIELD_GET(KVASER_PCIEFD_PACKET_SEQ_MASK, p->header[1]) && status & KVASER_PCIEFD_KCAN_STAT_IDLE) { - u32 cmd; - iowrite32(KVASER_PCIEFD_KCAN_IRQ_ABD, can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); - cmd = KVASER_PCIEFD_KCAN_CMD_AT; - cmd |= ++can->cmd_seq << KVASER_PCIEFD_KCAN_CMD_SEQ_SHIFT; - iowrite32(cmd, can->reg_base + KVASER_PCIEFD_KCAN_CMD_REG); + kvaser_pciefd_abort_flush_reset(can); } else if (p->header[0] & KVASER_PCIEFD_SPACK_IDET && p->header[0] & KVASER_PCIEFD_SPACK_IRM && - cmdseq == (p->header[1] & KVASER_PCIEFD_PACKET_SEQ_MSK) && + cmdseq == FIELD_GET(KVASER_PCIEFD_PACKET_SEQ_MASK, p->header[1]) && status & KVASER_PCIEFD_KCAN_STAT_IDLE) { /* Reset detected, send end of flush if no packet are in FIFO */ - u8 count = ioread32(can->reg_base + - KVASER_PCIEFD_KCAN_TX_NPACKETS_REG) & 0xff; + u8 count; + count = FIELD_GET(KVASER_PCIEFD_KCAN_TX_NR_PACKETS_CURRENT_MASK, + ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NR_PACKETS_REG)); if (!count) - iowrite32(KVASER_PCIEFD_KCAN_CTRL_EFLUSH, + iowrite32(FIELD_PREP(KVASER_PCIEFD_KCAN_CTRL_TYPE_MASK, + KVASER_PCIEFD_KCAN_CTRL_TYPE_EFLUSH), can->reg_base + KVASER_PCIEFD_KCAN_CTRL_REG); } else if (!(p->header[1] & KVASER_PCIEFD_SPACK_AUTO) && - cmdseq == (p->header[1] & KVASER_PCIEFD_PACKET_SEQ_MSK)) { + cmdseq == FIELD_GET(KVASER_PCIEFD_PACKET_SEQ_MASK, p->header[1])) { /* Response to status request received */ kvaser_pciefd_handle_status_resp(can, p); if (can->can.state != CAN_STATE_BUS_OFF && can->can.state != CAN_STATE_ERROR_ACTIVE) { - mod_timer(&can->bec_poll_timer, - KVASER_PCIEFD_BEC_POLL_FREQ); + mod_timer(&can->bec_poll_timer, KVASER_PCIEFD_BEC_POLL_FREQ); } } else if (p->header[0] & KVASER_PCIEFD_SPACK_RMCD && - !(status & KVASER_PCIEFD_KCAN_STAT_BUS_OFF_MSK)) { + !(status & KVASER_PCIEFD_KCAN_STAT_BUS_OFF_MASK)) { /* Reset to bus on detected */ if (!completion_done(&can->start_comp)) complete(&can->start_comp); @@ -1472,50 +1242,14 @@ static int kvaser_pciefd_handle_status_packet(struct kvaser_pciefd *pcie, return 0; } -static int kvaser_pciefd_handle_eack_packet(struct kvaser_pciefd *pcie, - struct kvaser_pciefd_rx_packet *p) -{ - struct kvaser_pciefd_can *can; - u8 ch_id = (p->header[1] >> KVASER_PCIEFD_PACKET_CHID_SHIFT) & 0x7; - - if (ch_id >= pcie->nr_channels) - return -EIO; - - can = pcie->can[ch_id]; - - /* If this is the last flushed packet, send end of flush */ - if (p->header[0] & KVASER_PCIEFD_APACKET_FLU) { - u8 count = ioread32(can->reg_base + - KVASER_PCIEFD_KCAN_TX_NPACKETS_REG) & 0xff; - - if (count == 0) - iowrite32(KVASER_PCIEFD_KCAN_CTRL_EFLUSH, - can->reg_base + KVASER_PCIEFD_KCAN_CTRL_REG); - } else { - int echo_idx = p->header[0] & KVASER_PCIEFD_PACKET_SEQ_MSK; - int dlc = can_get_echo_skb(can->can.dev, echo_idx, NULL); - struct net_device_stats *stats = &can->can.dev->stats; - - stats->tx_bytes += dlc; - stats->tx_packets++; - - if (netif_queue_stopped(can->can.dev)) - netif_wake_queue(can->can.dev); - } - - return 0; -} - static void kvaser_pciefd_handle_nack_packet(struct kvaser_pciefd_can *can, struct kvaser_pciefd_rx_packet *p) { struct sk_buff *skb; - struct net_device_stats *stats = &can->can.dev->stats; struct can_frame *cf; skb = alloc_can_err_skb(can->can.dev, &cf); - - stats->tx_errors++; + can->can.dev->stats.tx_errors++; if (p->header[0] & KVASER_PCIEFD_APACKET_ABL) { if (skb) cf->can_id |= CAN_ERR_LOSTARB; @@ -1526,9 +1260,10 @@ static void kvaser_pciefd_handle_nack_packet(struct kvaser_pciefd_can *can, if (skb) { cf->can_id |= CAN_ERR_BUSERROR; + kvaser_pciefd_set_skb_timestamp(can->kv_pcie, skb, p->timestamp); netif_rx(skb); } else { - stats->rx_dropped++; + can->can.dev->stats.rx_dropped++; netdev_warn(can->can.dev, "No memory left for err_skb\n"); } } @@ -1538,7 +1273,7 @@ static int kvaser_pciefd_handle_ack_packet(struct kvaser_pciefd *pcie, { struct kvaser_pciefd_can *can; bool one_shot_fail = false; - u8 ch_id = (p->header[1] >> KVASER_PCIEFD_PACKET_CHID_SHIFT) & 0x7; + u8 ch_id = FIELD_GET(KVASER_PCIEFD_PACKET_CHID_MASK, p->header[1]); if (ch_id >= pcie->nr_channels) return -EIO; @@ -1556,20 +1291,24 @@ static int kvaser_pciefd_handle_ack_packet(struct kvaser_pciefd *pcie, if (p->header[0] & KVASER_PCIEFD_APACKET_FLU) { netdev_dbg(can->can.dev, "Packet was flushed\n"); } else { - int echo_idx = p->header[0] & KVASER_PCIEFD_PACKET_SEQ_MSK; - int dlc = can_get_echo_skb(can->can.dev, echo_idx, NULL); - u8 count = ioread32(can->reg_base + - KVASER_PCIEFD_KCAN_TX_NPACKETS_REG) & 0xff; + int echo_idx = FIELD_GET(KVASER_PCIEFD_PACKET_SEQ_MASK, p->header[0]); + int len; + u8 count; + struct sk_buff *skb; - if (count < KVASER_PCIEFD_CAN_TX_MAX_COUNT && - netif_queue_stopped(can->can.dev)) + skb = can->can.echo_skb[echo_idx]; + if (skb) + kvaser_pciefd_set_skb_timestamp(pcie, skb, p->timestamp); + len = can_get_echo_skb(can->can.dev, echo_idx, NULL); + count = FIELD_GET(KVASER_PCIEFD_KCAN_TX_NR_PACKETS_CURRENT_MASK, + ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NR_PACKETS_REG)); + + if (count < can->can.echo_skb_max && netif_queue_stopped(can->can.dev)) netif_wake_queue(can->can.dev); if (!one_shot_fail) { - struct net_device_stats *stats = &can->can.dev->stats; - - stats->tx_bytes += dlc; - stats->tx_packets++; + can->can.dev->stats.tx_bytes += len; + can->can.dev->stats.tx_packets++; } } @@ -1580,7 +1319,7 @@ static int kvaser_pciefd_handle_eflush_packet(struct kvaser_pciefd *pcie, struct kvaser_pciefd_rx_packet *p) { struct kvaser_pciefd_can *can; - u8 ch_id = (p->header[1] >> KVASER_PCIEFD_PACKET_CHID_SHIFT) & 0x7; + u8 ch_id = FIELD_GET(KVASER_PCIEFD_PACKET_CHID_MASK, p->header[1]); if (ch_id >= pcie->nr_channels) return -EIO; @@ -1619,15 +1358,15 @@ static int kvaser_pciefd_read_packet(struct kvaser_pciefd *pcie, int *start_pos, pos += 2; p->timestamp = le64_to_cpu(timestamp); - type = (p->header[1] >> KVASER_PCIEFD_PACKET_TYPE_SHIFT) & 0xf; + type = FIELD_GET(KVASER_PCIEFD_PACKET_TYPE_MASK, p->header[1]); switch (type) { case KVASER_PCIEFD_PACK_TYPE_DATA: ret = kvaser_pciefd_handle_data_packet(pcie, p, &buffer[pos]); if (!(p->header[0] & KVASER_PCIEFD_RPACKET_RTR)) { u8 data_len; - data_len = can_fd_dlc2len(p->header[1] >> - KVASER_PCIEFD_RPACKET_DLC_SHIFT); + data_len = can_fd_dlc2len(FIELD_GET(KVASER_PCIEFD_RPACKET_DLC_MASK, + p->header[1])); pos += DIV_ROUND_UP(data_len, 4); } break; @@ -1644,16 +1383,13 @@ static int kvaser_pciefd_read_packet(struct kvaser_pciefd *pcie, int *start_pos, ret = kvaser_pciefd_handle_error_packet(pcie, p); break; - case KVASER_PCIEFD_PACK_TYPE_EFRAME_ACK: - ret = kvaser_pciefd_handle_eack_packet(pcie, p); - break; - case KVASER_PCIEFD_PACK_TYPE_EFLUSH_ACK: ret = kvaser_pciefd_handle_eflush_packet(pcie, p); break; case KVASER_PCIEFD_PACK_TYPE_ACK_DATA: case KVASER_PCIEFD_PACK_TYPE_BUS_LOAD: + case KVASER_PCIEFD_PACK_TYPE_EFRAME_ACK: case KVASER_PCIEFD_PACK_TYPE_TXRQ: dev_info(&pcie->pci->dev, "Received unexpected packet type 0x%08X\n", type); @@ -1692,7 +1428,7 @@ static int kvaser_pciefd_read_buffer(struct kvaser_pciefd *pcie, int dma_buf) return res; } -static int kvaser_pciefd_receive_irq(struct kvaser_pciefd *pcie) +static void kvaser_pciefd_receive_irq(struct kvaser_pciefd *pcie) { u32 irq; @@ -1718,10 +1454,9 @@ static int kvaser_pciefd_receive_irq(struct kvaser_pciefd *pcie) dev_err(&pcie->pci->dev, "DMA IRQ error 0x%08X\n", irq); iowrite32(irq, pcie->reg_base + KVASER_PCIEFD_SRB_IRQ_REG); - return 0; } -static int kvaser_pciefd_transmit_irq(struct kvaser_pciefd_can *can) +static void kvaser_pciefd_transmit_irq(struct kvaser_pciefd_can *can) { u32 irq = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); @@ -1739,7 +1474,6 @@ static int kvaser_pciefd_transmit_irq(struct kvaser_pciefd_can *can) netdev_err(can->can.dev, "Rx FIFO overflow\n"); iowrite32(irq, can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); - return 0; } static irqreturn_t kvaser_pciefd_irq_handler(int irq, void *dev) @@ -1750,7 +1484,7 @@ static irqreturn_t kvaser_pciefd_irq_handler(int irq, void *dev) board_irq = ioread32(pcie->reg_base + KVASER_PCIEFD_IRQ_REG); - if (!(board_irq & KVASER_PCIEFD_IRQ_ALL_MSK)) + if (!(board_irq & KVASER_PCIEFD_IRQ_ALL_MASK)) return IRQ_NONE; if (board_irq & KVASER_PCIEFD_IRQ_SRB) @@ -1768,20 +1502,18 @@ static irqreturn_t kvaser_pciefd_irq_handler(int irq, void *dev) kvaser_pciefd_transmit_irq(pcie->can[i]); } - iowrite32(board_irq, pcie->reg_base + KVASER_PCIEFD_IRQ_REG); return IRQ_HANDLED; } static void kvaser_pciefd_teardown_can_ctrls(struct kvaser_pciefd *pcie) { int i; - struct kvaser_pciefd_can *can; for (i = 0; i < pcie->nr_channels; i++) { - can = pcie->can[i]; + struct kvaser_pciefd_can *can = pcie->can[i]; + if (can) { - iowrite32(0, - can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); + iowrite32(0, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); kvaser_pciefd_pwm_stop(can); free_candev(can->can.dev); } @@ -1842,10 +1574,8 @@ static int kvaser_pciefd_probe(struct pci_dev *pdev, KVASER_PCIEFD_SRB_IRQ_DUF0 | KVASER_PCIEFD_SRB_IRQ_DUF1, pcie->reg_base + KVASER_PCIEFD_SRB_IEN_REG); - /* Reset IRQ handling, expected to be off before */ - iowrite32(KVASER_PCIEFD_IRQ_ALL_MSK, - pcie->reg_base + KVASER_PCIEFD_IRQ_REG); - iowrite32(KVASER_PCIEFD_IRQ_ALL_MSK, + /* Enable PCI interrupts */ + iowrite32(KVASER_PCIEFD_IRQ_ALL_MASK, pcie->reg_base + KVASER_PCIEFD_IEN_REG); /* Ready the DMA buffers */ @@ -1884,14 +1614,13 @@ err_disable_pci: static void kvaser_pciefd_remove_all_ctrls(struct kvaser_pciefd *pcie) { - struct kvaser_pciefd_can *can; int i; for (i = 0; i < pcie->nr_channels; i++) { - can = pcie->can[i]; + struct kvaser_pciefd_can *can = pcie->can[i]; + if (can) { - iowrite32(0, - can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); + iowrite32(0, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); unregister_candev(can->can.dev); del_timer(&can->bec_poll_timer); kvaser_pciefd_pwm_stop(can); @@ -1906,10 +1635,8 @@ static void kvaser_pciefd_remove(struct pci_dev *pdev) kvaser_pciefd_remove_all_ctrls(pcie); - /* Turn off IRQ generation */ + /* Disable interrupts */ iowrite32(0, pcie->reg_base + KVASER_PCIEFD_SRB_CTRL_REG); - iowrite32(KVASER_PCIEFD_IRQ_ALL_MSK, - pcie->reg_base + KVASER_PCIEFD_IRQ_REG); iowrite32(0, pcie->reg_base + KVASER_PCIEFD_IEN_REG); free_irq(pcie->pci->irq, pcie); diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index a5003435802b..c5af92bcc9c9 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -469,7 +469,7 @@ static void m_can_receive_skb(struct m_can_classdev *cdev, int err; err = can_rx_offload_queue_timestamp(&cdev->offload, skb, - timestamp); + timestamp); if (err) stats->rx_fifo_errors++; } else { @@ -895,7 +895,7 @@ static int m_can_handle_bus_errors(struct net_device *dev, u32 irqstatus, netdev_dbg(dev, "Arbitration phase error detected\n"); work_done += m_can_handle_lec_err(dev, lec); } - + if (is_lec_err(dlec)) { netdev_dbg(dev, "Data phase error detected\n"); work_done += m_can_handle_lec_err(dev, dlec); diff --git a/drivers/net/can/sja1000/sja1000.c b/drivers/net/can/sja1000/sja1000.c index aac5956e4a53..0ada0e160e93 100644 --- a/drivers/net/can/sja1000/sja1000.c +++ b/drivers/net/can/sja1000/sja1000.c @@ -387,6 +387,16 @@ static void sja1000_rx(struct net_device *dev) netif_rx(skb); } +static irqreturn_t sja1000_reset_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = (struct net_device *)dev_id; + + netdev_dbg(dev, "performing a soft reset upon overrun\n"); + sja1000_start(dev); + + return IRQ_HANDLED; +} + static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status) { struct sja1000_priv *priv = netdev_priv(dev); @@ -397,6 +407,7 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status) enum can_state rx_state, tx_state; unsigned int rxerr, txerr; uint8_t ecc, alc; + int ret = 0; skb = alloc_can_err_skb(dev, &cf); if (skb == NULL) @@ -413,6 +424,15 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status) stats->rx_over_errors++; stats->rx_errors++; sja1000_write_cmdreg(priv, CMD_CDO); /* clear bit */ + + /* Some controllers needs additional handling upon overrun + * condition: the controller may sometimes be totally confused + * and refuse any new frame while its buffer is empty. The only + * way to re-sync the read vs. write buffer offsets is to + * stop any current handling and perform a reset. + */ + if (priv->flags & SJA1000_QUIRK_RESET_ON_OVERRUN) + ret = IRQ_WAKE_THREAD; } if (isrc & IRQ_EI) { @@ -492,7 +512,7 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status) netif_rx(skb); - return 0; + return ret; } irqreturn_t sja1000_interrupt(int irq, void *dev_id) @@ -501,7 +521,8 @@ irqreturn_t sja1000_interrupt(int irq, void *dev_id) struct sja1000_priv *priv = netdev_priv(dev); struct net_device_stats *stats = &dev->stats; uint8_t isrc, status; - int n = 0; + irqreturn_t ret = 0; + int n = 0, err; if (priv->pre_irq) priv->pre_irq(priv); @@ -546,19 +567,25 @@ irqreturn_t sja1000_interrupt(int irq, void *dev_id) } if (isrc & (IRQ_DOI | IRQ_EI | IRQ_BEI | IRQ_EPI | IRQ_ALI)) { /* error interrupt */ - if (sja1000_err(dev, isrc, status)) + err = sja1000_err(dev, isrc, status); + if (err == IRQ_WAKE_THREAD) + ret = err; + if (err) break; } n++; } out: + if (!ret) + ret = (n) ? IRQ_HANDLED : IRQ_NONE; + if (priv->post_irq) priv->post_irq(priv); if (n >= SJA1000_MAX_IRQ) netdev_dbg(dev, "%d messages handled in ISR", n); - return (n) ? IRQ_HANDLED : IRQ_NONE; + return ret; } EXPORT_SYMBOL_GPL(sja1000_interrupt); @@ -577,8 +604,9 @@ static int sja1000_open(struct net_device *dev) /* register interrupt handler, if not done by the device driver */ if (!(priv->flags & SJA1000_CUSTOM_IRQ_HANDLER)) { - err = request_irq(dev->irq, sja1000_interrupt, priv->irq_flags, - dev->name, (void *)dev); + err = request_threaded_irq(dev->irq, sja1000_interrupt, + sja1000_reset_interrupt, + priv->irq_flags, dev->name, (void *)dev); if (err) { close_candev(dev); return -EAGAIN; diff --git a/drivers/net/can/sja1000/sja1000.h b/drivers/net/can/sja1000/sja1000.h index 7f736f1df547..f015e39e2224 100644 --- a/drivers/net/can/sja1000/sja1000.h +++ b/drivers/net/can/sja1000/sja1000.h @@ -147,6 +147,7 @@ */ #define SJA1000_CUSTOM_IRQ_HANDLER BIT(0) #define SJA1000_QUIRK_NO_CDR_REG BIT(1) +#define SJA1000_QUIRK_RESET_ON_OVERRUN BIT(2) /* * SJA1000 private data structure diff --git a/drivers/net/can/sja1000/sja1000_platform.c b/drivers/net/can/sja1000/sja1000_platform.c index b4889b5746e5..4e59952c66d4 100644 --- a/drivers/net/can/sja1000/sja1000_platform.c +++ b/drivers/net/can/sja1000/sja1000_platform.c @@ -106,7 +106,7 @@ static void sp_technologic_init(struct sja1000_priv *priv, struct device_node *o static void sp_rzn1_init(struct sja1000_priv *priv, struct device_node *of) { - priv->flags = SJA1000_QUIRK_NO_CDR_REG; + priv->flags = SJA1000_QUIRK_NO_CDR_REG | SJA1000_QUIRK_RESET_ON_OVERRUN; } static void sp_populate(struct sja1000_priv *priv, @@ -277,6 +277,9 @@ static int sp_probe(struct platform_device *pdev) priv->irq_flags = IRQF_SHARED; } + if (priv->flags & SJA1000_QUIRK_RESET_ON_OVERRUN) + priv->irq_flags |= IRQF_ONESHOT; + dev->irq = irq; priv->reg_base = addr; diff --git a/drivers/net/can/ti_hecc.c b/drivers/net/can/ti_hecc.c index 9bab0b4cc449..54284661992e 100644 --- a/drivers/net/can/ti_hecc.c +++ b/drivers/net/can/ti_hecc.c @@ -625,7 +625,7 @@ static int ti_hecc_error(struct net_device *ndev, int int_status, timestamp = hecc_read(priv, HECC_CANLNT); err = can_rx_offload_queue_timestamp(&priv->offload, skb, - timestamp); + timestamp); if (err) ndev->stats.rx_fifo_errors++; } diff --git a/drivers/net/can/usb/esd_usb.c b/drivers/net/can/usb/esd_usb.c index d33bac3a6c10..6201637ac0ff 100644 --- a/drivers/net/can/usb/esd_usb.c +++ b/drivers/net/can/usb/esd_usb.c @@ -3,18 +3,19 @@ * CAN driver for esd electronics gmbh CAN-USB/2 and CAN-USB/Micro * * Copyright (C) 2010-2012 esd electronic system design gmbh, Matthias Fuchs <socketcan@esd.eu> - * Copyright (C) 2022 esd electronics gmbh, Frank Jungclaus <frank.jungclaus@esd.eu> + * Copyright (C) 2022-2023 esd electronics gmbh, Frank Jungclaus <frank.jungclaus@esd.eu> */ -#include <linux/ethtool.h> -#include <linux/signal.h> -#include <linux/slab.h> -#include <linux/module.h> -#include <linux/netdevice.h> -#include <linux/usb.h> #include <linux/can.h> #include <linux/can/dev.h> #include <linux/can/error.h> +#include <linux/ethtool.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/signal.h> +#include <linux/slab.h> +#include <linux/units.h> +#include <linux/usb.h> MODULE_AUTHOR("Matthias Fuchs <socketcan@esd.eu>"); MODULE_AUTHOR("Frank Jungclaus <frank.jungclaus@esd.eu>"); @@ -22,95 +23,87 @@ MODULE_DESCRIPTION("CAN driver for esd electronics gmbh CAN-USB/2 and CAN-USB/Mi MODULE_LICENSE("GPL v2"); /* USB vendor and product ID */ -#define USB_ESDGMBH_VENDOR_ID 0x0ab4 -#define USB_CANUSB2_PRODUCT_ID 0x0010 -#define USB_CANUSBM_PRODUCT_ID 0x0011 +#define ESD_USB_ESDGMBH_VENDOR_ID 0x0ab4 +#define ESD_USB_CANUSB2_PRODUCT_ID 0x0010 +#define ESD_USB_CANUSBM_PRODUCT_ID 0x0011 /* CAN controller clock frequencies */ -#define ESD_USB2_CAN_CLOCK 60000000 -#define ESD_USBM_CAN_CLOCK 36000000 +#define ESD_USB_2_CAN_CLOCK (60 * MEGA) /* Hz */ +#define ESD_USB_M_CAN_CLOCK (36 * MEGA) /* Hz */ /* Maximum number of CAN nets */ #define ESD_USB_MAX_NETS 2 /* USB commands */ -#define CMD_VERSION 1 /* also used for VERSION_REPLY */ -#define CMD_CAN_RX 2 /* device to host only */ -#define CMD_CAN_TX 3 /* also used for TX_DONE */ -#define CMD_SETBAUD 4 /* also used for SETBAUD_REPLY */ -#define CMD_TS 5 /* also used for TS_REPLY */ -#define CMD_IDADD 6 /* also used for IDADD_REPLY */ +#define ESD_USB_CMD_VERSION 1 /* also used for VERSION_REPLY */ +#define ESD_USB_CMD_CAN_RX 2 /* device to host only */ +#define ESD_USB_CMD_CAN_TX 3 /* also used for TX_DONE */ +#define ESD_USB_CMD_SETBAUD 4 /* also used for SETBAUD_REPLY */ +#define ESD_USB_CMD_TS 5 /* also used for TS_REPLY */ +#define ESD_USB_CMD_IDADD 6 /* also used for IDADD_REPLY */ /* esd CAN message flags - dlc field */ -#define ESD_RTR 0x10 +#define ESD_USB_RTR BIT(4) /* esd CAN message flags - id field */ -#define ESD_EXTID 0x20000000 -#define ESD_EVENT 0x40000000 -#define ESD_IDMASK 0x1fffffff +#define ESD_USB_EXTID BIT(29) +#define ESD_USB_EVENT BIT(30) +#define ESD_USB_IDMASK GENMASK(28, 0) /* esd CAN event ids */ -#define ESD_EV_CAN_ERROR_EXT 2 /* CAN controller specific diagnostic data */ +#define ESD_USB_EV_CAN_ERROR_EXT 2 /* CAN controller specific diagnostic data */ /* baudrate message flags */ -#define ESD_USB_UBR 0x80000000 -#define ESD_USB_LOM 0x40000000 -#define ESD_USB_NO_BAUDRATE 0x7fffffff - -/* bit timing CAN-USB/2 */ -#define ESD_USB2_TSEG1_MIN 1 -#define ESD_USB2_TSEG1_MAX 16 -#define ESD_USB2_TSEG1_SHIFT 16 -#define ESD_USB2_TSEG2_MIN 1 -#define ESD_USB2_TSEG2_MAX 8 -#define ESD_USB2_TSEG2_SHIFT 20 -#define ESD_USB2_SJW_MAX 4 -#define ESD_USB2_SJW_SHIFT 14 -#define ESD_USBM_SJW_SHIFT 24 -#define ESD_USB2_BRP_MIN 1 -#define ESD_USB2_BRP_MAX 1024 -#define ESD_USB2_BRP_INC 1 -#define ESD_USB2_3_SAMPLES 0x00800000 +#define ESD_USB_LOM BIT(30) /* Listen Only Mode */ +#define ESD_USB_UBR BIT(31) /* User Bit Rate (controller BTR) in bits 0..27 */ +#define ESD_USB_NO_BAUDRATE GENMASK(30, 0) /* bit rate unconfigured */ + +/* bit timing esd CAN-USB */ +#define ESD_USB_2_TSEG1_SHIFT 16 +#define ESD_USB_2_TSEG2_SHIFT 20 +#define ESD_USB_2_SJW_SHIFT 14 +#define ESD_USB_M_SJW_SHIFT 24 +#define ESD_USB_TRIPLE_SAMPLES BIT(23) /* esd IDADD message */ -#define ESD_ID_ENABLE 0x80 -#define ESD_MAX_ID_SEGMENT 64 +#define ESD_USB_ID_ENABLE BIT(7) +#define ESD_USB_MAX_ID_SEGMENT 64 /* SJA1000 ECC register (emulated by usb firmware) */ -#define SJA1000_ECC_SEG 0x1F -#define SJA1000_ECC_DIR 0x20 -#define SJA1000_ECC_ERR 0x06 -#define SJA1000_ECC_BIT 0x00 -#define SJA1000_ECC_FORM 0x40 -#define SJA1000_ECC_STUFF 0x80 -#define SJA1000_ECC_MASK 0xc0 +#define ESD_USB_SJA1000_ECC_SEG GENMASK(4, 0) +#define ESD_USB_SJA1000_ECC_DIR BIT(5) +#define ESD_USB_SJA1000_ECC_ERR BIT(2, 1) +#define ESD_USB_SJA1000_ECC_BIT 0x00 +#define ESD_USB_SJA1000_ECC_FORM BIT(6) +#define ESD_USB_SJA1000_ECC_STUFF BIT(7) +#define ESD_USB_SJA1000_ECC_MASK GENMASK(7, 6) /* esd bus state event codes */ -#define ESD_BUSSTATE_MASK 0xc0 -#define ESD_BUSSTATE_WARN 0x40 -#define ESD_BUSSTATE_ERRPASSIVE 0x80 -#define ESD_BUSSTATE_BUSOFF 0xc0 +#define ESD_USB_BUSSTATE_MASK GENMASK(7, 6) +#define ESD_USB_BUSSTATE_WARN BIT(6) +#define ESD_USB_BUSSTATE_ERRPASSIVE BIT(7) +#define ESD_USB_BUSSTATE_BUSOFF GENMASK(7, 6) -#define RX_BUFFER_SIZE 1024 -#define MAX_RX_URBS 4 -#define MAX_TX_URBS 16 /* must be power of 2 */ +#define ESD_USB_RX_BUFFER_SIZE 1024 +#define ESD_USB_MAX_RX_URBS 4 +#define ESD_USB_MAX_TX_URBS 16 /* must be power of 2 */ -struct header_msg { - u8 len; /* len is always the total message length in 32bit words */ +struct esd_usb_header_msg { + u8 len; /* total message length in 32bit words */ u8 cmd; u8 rsvd[2]; }; -struct version_msg { - u8 len; +struct esd_usb_version_msg { + u8 len; /* total message length in 32bit words */ u8 cmd; u8 rsvd; u8 flags; __le32 drv_version; }; -struct version_reply_msg { - u8 len; +struct esd_usb_version_reply_msg { + u8 len; /* total message length in 32bit words */ u8 cmd; u8 nets; u8 features; @@ -120,15 +113,15 @@ struct version_reply_msg { __le32 ts; }; -struct rx_msg { - u8 len; +struct esd_usb_rx_msg { + u8 len; /* total message length in 32bit words */ u8 cmd; u8 net; u8 dlc; __le32 ts; __le32 id; /* upper 3 bits contain flags */ union { - u8 data[8]; + u8 data[CAN_MAX_DLEN]; struct { u8 status; /* CAN Controller Status */ u8 ecc; /* Error Capture Register */ @@ -138,18 +131,18 @@ struct rx_msg { }; }; -struct tx_msg { - u8 len; +struct esd_usb_tx_msg { + u8 len; /* total message length in 32bit words */ u8 cmd; u8 net; u8 dlc; u32 hnd; /* opaque handle, not used by device */ __le32 id; /* upper 3 bits contain flags */ - u8 data[8]; + u8 data[CAN_MAX_DLEN]; }; -struct tx_done_msg { - u8 len; +struct esd_usb_tx_done_msg { + u8 len; /* total message length in 32bit words */ u8 cmd; u8 net; u8 status; @@ -157,16 +150,16 @@ struct tx_done_msg { __le32 ts; }; -struct id_filter_msg { - u8 len; +struct esd_usb_id_filter_msg { + u8 len; /* total message length in 32bit words */ u8 cmd; u8 net; u8 option; - __le32 mask[ESD_MAX_ID_SEGMENT + 1]; + __le32 mask[ESD_USB_MAX_ID_SEGMENT + 1]; /* +1 for 29bit extended IDs */ }; -struct set_baudrate_msg { - u8 len; +struct esd_usb_set_baudrate_msg { + u8 len; /* total message length in 32bit words */ u8 cmd; u8 net; u8 rsvd; @@ -175,19 +168,19 @@ struct set_baudrate_msg { /* Main message type used between library and application */ union __packed esd_usb_msg { - struct header_msg hdr; - struct version_msg version; - struct version_reply_msg version_reply; - struct rx_msg rx; - struct tx_msg tx; - struct tx_done_msg txdone; - struct set_baudrate_msg setbaud; - struct id_filter_msg filter; + struct esd_usb_header_msg hdr; + struct esd_usb_version_msg version; + struct esd_usb_version_reply_msg version_reply; + struct esd_usb_rx_msg rx; + struct esd_usb_tx_msg tx; + struct esd_usb_tx_done_msg txdone; + struct esd_usb_set_baudrate_msg setbaud; + struct esd_usb_id_filter_msg filter; }; static struct usb_device_id esd_usb_table[] = { - {USB_DEVICE(USB_ESDGMBH_VENDOR_ID, USB_CANUSB2_PRODUCT_ID)}, - {USB_DEVICE(USB_ESDGMBH_VENDOR_ID, USB_CANUSBM_PRODUCT_ID)}, + {USB_DEVICE(ESD_USB_ESDGMBH_VENDOR_ID, ESD_USB_CANUSB2_PRODUCT_ID)}, + {USB_DEVICE(ESD_USB_ESDGMBH_VENDOR_ID, ESD_USB_CANUSBM_PRODUCT_ID)}, {} }; MODULE_DEVICE_TABLE(usb, esd_usb_table); @@ -208,8 +201,8 @@ struct esd_usb { int net_count; u32 version; int rxinitdone; - void *rxbuf[MAX_RX_URBS]; - dma_addr_t rxbuf_dma[MAX_RX_URBS]; + void *rxbuf[ESD_USB_MAX_RX_URBS]; + dma_addr_t rxbuf_dma[ESD_USB_MAX_RX_URBS]; }; struct esd_usb_net_priv { @@ -217,7 +210,7 @@ struct esd_usb_net_priv { atomic_t active_tx_jobs; struct usb_anchor tx_submitted; - struct esd_tx_urb_context tx_contexts[MAX_TX_URBS]; + struct esd_tx_urb_context tx_contexts[ESD_USB_MAX_TX_URBS]; struct esd_usb *usb; struct net_device *netdev; @@ -232,9 +225,9 @@ static void esd_usb_rx_event(struct esd_usb_net_priv *priv, struct net_device_stats *stats = &priv->netdev->stats; struct can_frame *cf; struct sk_buff *skb; - u32 id = le32_to_cpu(msg->rx.id) & ESD_IDMASK; + u32 id = le32_to_cpu(msg->rx.id) & ESD_USB_IDMASK; - if (id == ESD_EV_CAN_ERROR_EXT) { + if (id == ESD_USB_EV_CAN_ERROR_EXT) { u8 state = msg->rx.ev_can_err_ext.status; u8 ecc = msg->rx.ev_can_err_ext.ecc; @@ -261,15 +254,15 @@ static void esd_usb_rx_event(struct esd_usb_net_priv *priv, priv->old_state = state; - switch (state & ESD_BUSSTATE_MASK) { - case ESD_BUSSTATE_BUSOFF: + switch (state & ESD_USB_BUSSTATE_MASK) { + case ESD_USB_BUSSTATE_BUSOFF: new_state = CAN_STATE_BUS_OFF; can_bus_off(priv->netdev); break; - case ESD_BUSSTATE_WARN: + case ESD_USB_BUSSTATE_WARN: new_state = CAN_STATE_ERROR_WARNING; break; - case ESD_BUSSTATE_ERRPASSIVE: + case ESD_USB_BUSSTATE_ERRPASSIVE: new_state = CAN_STATE_ERROR_PASSIVE; break; default: @@ -291,14 +284,14 @@ static void esd_usb_rx_event(struct esd_usb_net_priv *priv, cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR; - switch (ecc & SJA1000_ECC_MASK) { - case SJA1000_ECC_BIT: + switch (ecc & ESD_USB_SJA1000_ECC_MASK) { + case ESD_USB_SJA1000_ECC_BIT: cf->data[2] |= CAN_ERR_PROT_BIT; break; - case SJA1000_ECC_FORM: + case ESD_USB_SJA1000_ECC_FORM: cf->data[2] |= CAN_ERR_PROT_FORM; break; - case SJA1000_ECC_STUFF: + case ESD_USB_SJA1000_ECC_STUFF: cf->data[2] |= CAN_ERR_PROT_STUFF; break; default: @@ -306,11 +299,11 @@ static void esd_usb_rx_event(struct esd_usb_net_priv *priv, } /* Error occurred during transmission? */ - if (!(ecc & SJA1000_ECC_DIR)) + if (!(ecc & ESD_USB_SJA1000_ECC_DIR)) cf->data[2] |= CAN_ERR_PROT_TX; /* Bit stream position in CAN frame as the error was detected */ - cf->data[3] = ecc & SJA1000_ECC_SEG; + cf->data[3] = ecc & ESD_USB_SJA1000_ECC_SEG; } if (skb) { @@ -337,7 +330,7 @@ static void esd_usb_rx_can_msg(struct esd_usb_net_priv *priv, id = le32_to_cpu(msg->rx.id); - if (id & ESD_EVENT) { + if (id & ESD_USB_EVENT) { esd_usb_rx_event(priv, msg); } else { skb = alloc_can_skb(priv->netdev, &cf); @@ -346,14 +339,14 @@ static void esd_usb_rx_can_msg(struct esd_usb_net_priv *priv, return; } - cf->can_id = id & ESD_IDMASK; - can_frame_set_cc_len(cf, msg->rx.dlc & ~ESD_RTR, + cf->can_id = id & ESD_USB_IDMASK; + can_frame_set_cc_len(cf, msg->rx.dlc & ~ESD_USB_RTR, priv->can.ctrlmode); - if (id & ESD_EXTID) + if (id & ESD_USB_EXTID) cf->can_id |= CAN_EFF_FLAG; - if (msg->rx.dlc & ESD_RTR) { + if (msg->rx.dlc & ESD_USB_RTR) { cf->can_id |= CAN_RTR_FLAG; } else { for (i = 0; i < cf->len; i++) @@ -377,7 +370,7 @@ static void esd_usb_tx_done_msg(struct esd_usb_net_priv *priv, if (!netif_device_present(netdev)) return; - context = &priv->tx_contexts[msg->txdone.hnd & (MAX_TX_URBS - 1)]; + context = &priv->tx_contexts[msg->txdone.hnd & (ESD_USB_MAX_TX_URBS - 1)]; if (!msg->txdone.status) { stats->tx_packets++; @@ -389,7 +382,7 @@ static void esd_usb_tx_done_msg(struct esd_usb_net_priv *priv, } /* Release context */ - context->echo_index = MAX_TX_URBS; + context->echo_index = ESD_USB_MAX_TX_URBS; atomic_dec(&priv->active_tx_jobs); netif_wake_queue(netdev); @@ -424,7 +417,7 @@ static void esd_usb_read_bulk_callback(struct urb *urb) msg = (union esd_usb_msg *)(urb->transfer_buffer + pos); switch (msg->hdr.cmd) { - case CMD_CAN_RX: + case ESD_USB_CMD_CAN_RX: if (msg->rx.net >= dev->net_count) { dev_err(dev->udev->dev.parent, "format error\n"); break; @@ -433,7 +426,7 @@ static void esd_usb_read_bulk_callback(struct urb *urb) esd_usb_rx_can_msg(dev->nets[msg->rx.net], msg); break; - case CMD_CAN_TX: + case ESD_USB_CMD_CAN_TX: if (msg->txdone.net >= dev->net_count) { dev_err(dev->udev->dev.parent, "format error\n"); break; @@ -444,7 +437,7 @@ static void esd_usb_read_bulk_callback(struct urb *urb) break; } - pos += msg->hdr.len << 2; + pos += msg->hdr.len * sizeof(u32); /* convert to # of bytes */ if (pos > urb->actual_length) { dev_err(dev->udev->dev.parent, "format error\n"); @@ -454,7 +447,7 @@ static void esd_usb_read_bulk_callback(struct urb *urb) resubmit_urb: usb_fill_bulk_urb(urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1), - urb->transfer_buffer, RX_BUFFER_SIZE, + urb->transfer_buffer, ESD_USB_RX_BUFFER_SIZE, esd_usb_read_bulk_callback, dev); retval = usb_submit_urb(urb, GFP_ATOMIC); @@ -538,7 +531,7 @@ static int esd_usb_send_msg(struct esd_usb *dev, union esd_usb_msg *msg) return usb_bulk_msg(dev->udev, usb_sndbulkpipe(dev->udev, 2), msg, - msg->hdr.len << 2, + msg->hdr.len * sizeof(u32), /* convert to # of bytes */ &actual_length, 1000); } @@ -563,7 +556,7 @@ static int esd_usb_setup_rx_urbs(struct esd_usb *dev) if (dev->rxinitdone) return 0; - for (i = 0; i < MAX_RX_URBS; i++) { + for (i = 0; i < ESD_USB_MAX_RX_URBS; i++) { struct urb *urb = NULL; u8 *buf = NULL; dma_addr_t buf_dma; @@ -575,7 +568,7 @@ static int esd_usb_setup_rx_urbs(struct esd_usb *dev) break; } - buf = usb_alloc_coherent(dev->udev, RX_BUFFER_SIZE, GFP_KERNEL, + buf = usb_alloc_coherent(dev->udev, ESD_USB_RX_BUFFER_SIZE, GFP_KERNEL, &buf_dma); if (!buf) { dev_warn(dev->udev->dev.parent, @@ -588,7 +581,7 @@ static int esd_usb_setup_rx_urbs(struct esd_usb *dev) usb_fill_bulk_urb(urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1), - buf, RX_BUFFER_SIZE, + buf, ESD_USB_RX_BUFFER_SIZE, esd_usb_read_bulk_callback, dev); urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; usb_anchor_urb(urb, &dev->rx_submitted); @@ -596,7 +589,7 @@ static int esd_usb_setup_rx_urbs(struct esd_usb *dev) err = usb_submit_urb(urb, GFP_KERNEL); if (err) { usb_unanchor_urb(urb); - usb_free_coherent(dev->udev, RX_BUFFER_SIZE, buf, + usb_free_coherent(dev->udev, ESD_USB_RX_BUFFER_SIZE, buf, urb->transfer_dma); goto freeurb; } @@ -618,7 +611,7 @@ freeurb: } /* Warn if we've couldn't transmit all the URBs */ - if (i < MAX_RX_URBS) { + if (i < ESD_USB_MAX_RX_URBS) { dev_warn(dev->udev->dev.parent, "rx performance may be slow\n"); } @@ -653,14 +646,14 @@ static int esd_usb_start(struct esd_usb_net_priv *priv) * the number of the starting bitmask (0..64) to the filter.option * field followed by only some bitmasks. */ - msg->hdr.cmd = CMD_IDADD; - msg->hdr.len = 2 + ESD_MAX_ID_SEGMENT; + msg->hdr.cmd = ESD_USB_CMD_IDADD; + msg->hdr.len = sizeof(struct esd_usb_id_filter_msg) / sizeof(u32); /* # of 32bit words */ msg->filter.net = priv->index; - msg->filter.option = ESD_ID_ENABLE; /* start with segment 0 */ - for (i = 0; i < ESD_MAX_ID_SEGMENT; i++) - msg->filter.mask[i] = cpu_to_le32(0xffffffff); + msg->filter.option = ESD_USB_ID_ENABLE; /* start with segment 0 */ + for (i = 0; i < ESD_USB_MAX_ID_SEGMENT; i++) + msg->filter.mask[i] = cpu_to_le32(GENMASK(31, 0)); /* enable 29bit extended IDs */ - msg->filter.mask[ESD_MAX_ID_SEGMENT] = cpu_to_le32(0x00000001); + msg->filter.mask[ESD_USB_MAX_ID_SEGMENT] = cpu_to_le32(BIT(0)); err = esd_usb_send_msg(dev, msg); if (err) @@ -689,8 +682,8 @@ static void unlink_all_urbs(struct esd_usb *dev) usb_kill_anchored_urbs(&dev->rx_submitted); - for (i = 0; i < MAX_RX_URBS; ++i) - usb_free_coherent(dev->udev, RX_BUFFER_SIZE, + for (i = 0; i < ESD_USB_MAX_RX_URBS; ++i) + usb_free_coherent(dev->udev, ESD_USB_RX_BUFFER_SIZE, dev->rxbuf[i], dev->rxbuf_dma[i]); for (i = 0; i < dev->net_count; i++) { @@ -699,8 +692,8 @@ static void unlink_all_urbs(struct esd_usb *dev) usb_kill_anchored_urbs(&priv->tx_submitted); atomic_set(&priv->active_tx_jobs, 0); - for (j = 0; j < MAX_TX_URBS; j++) - priv->tx_contexts[j].echo_index = MAX_TX_URBS; + for (j = 0; j < ESD_USB_MAX_TX_URBS; j++) + priv->tx_contexts[j].echo_index = ESD_USB_MAX_TX_URBS; } } } @@ -765,25 +758,27 @@ static netdev_tx_t esd_usb_start_xmit(struct sk_buff *skb, msg = (union esd_usb_msg *)buf; - msg->hdr.len = 3; /* minimal length */ - msg->hdr.cmd = CMD_CAN_TX; + /* minimal length as # of 32bit words */ + msg->hdr.len = offsetof(struct esd_usb_tx_msg, data) / sizeof(u32); + msg->hdr.cmd = ESD_USB_CMD_CAN_TX; msg->tx.net = priv->index; msg->tx.dlc = can_get_cc_dlc(cf, priv->can.ctrlmode); msg->tx.id = cpu_to_le32(cf->can_id & CAN_ERR_MASK); if (cf->can_id & CAN_RTR_FLAG) - msg->tx.dlc |= ESD_RTR; + msg->tx.dlc |= ESD_USB_RTR; if (cf->can_id & CAN_EFF_FLAG) - msg->tx.id |= cpu_to_le32(ESD_EXTID); + msg->tx.id |= cpu_to_le32(ESD_USB_EXTID); for (i = 0; i < cf->len; i++) msg->tx.data[i] = cf->data[i]; - msg->hdr.len += (cf->len + 3) >> 2; + /* round up, then divide by 4 to add the payload length as # of 32bit words */ + msg->hdr.len += DIV_ROUND_UP(cf->len, sizeof(u32)); - for (i = 0; i < MAX_TX_URBS; i++) { - if (priv->tx_contexts[i].echo_index == MAX_TX_URBS) { + for (i = 0; i < ESD_USB_MAX_TX_URBS; i++) { + if (priv->tx_contexts[i].echo_index == ESD_USB_MAX_TX_URBS) { context = &priv->tx_contexts[i]; break; } @@ -800,10 +795,10 @@ static netdev_tx_t esd_usb_start_xmit(struct sk_buff *skb, context->echo_index = i; /* hnd must not be 0 - MSB is stripped in txdone handling */ - msg->tx.hnd = 0x80000000 | i; /* returned in TX done message */ + msg->tx.hnd = BIT(31) | i; /* returned in TX done message */ usb_fill_bulk_urb(urb, dev->udev, usb_sndbulkpipe(dev->udev, 2), buf, - msg->hdr.len << 2, + msg->hdr.len * sizeof(u32), /* convert to # of bytes */ esd_usb_write_bulk_callback, context); urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; @@ -815,7 +810,7 @@ static netdev_tx_t esd_usb_start_xmit(struct sk_buff *skb, atomic_inc(&priv->active_tx_jobs); /* Slow down tx path */ - if (atomic_read(&priv->active_tx_jobs) >= MAX_TX_URBS) + if (atomic_read(&priv->active_tx_jobs) >= ESD_USB_MAX_TX_URBS) netif_stop_queue(netdev); err = usb_submit_urb(urb, GFP_ATOMIC); @@ -865,18 +860,18 @@ static int esd_usb_close(struct net_device *netdev) return -ENOMEM; /* Disable all IDs (see esd_usb_start()) */ - msg->hdr.cmd = CMD_IDADD; - msg->hdr.len = 2 + ESD_MAX_ID_SEGMENT; + msg->hdr.cmd = ESD_USB_CMD_IDADD; + msg->hdr.len = sizeof(struct esd_usb_id_filter_msg) / sizeof(u32);/* # of 32bit words */ msg->filter.net = priv->index; - msg->filter.option = ESD_ID_ENABLE; /* start with segment 0 */ - for (i = 0; i <= ESD_MAX_ID_SEGMENT; i++) + msg->filter.option = ESD_USB_ID_ENABLE; /* start with segment 0 */ + for (i = 0; i <= ESD_USB_MAX_ID_SEGMENT; i++) msg->filter.mask[i] = 0; if (esd_usb_send_msg(priv->usb, msg) < 0) netdev_err(netdev, "sending idadd message failed\n"); /* set CAN controller to reset mode */ - msg->hdr.len = 2; - msg->hdr.cmd = CMD_SETBAUD; + msg->hdr.len = sizeof(struct esd_usb_set_baudrate_msg) / sizeof(u32); /* # of 32bit words */ + msg->hdr.cmd = ESD_USB_CMD_SETBAUD; msg->setbaud.net = priv->index; msg->setbaud.rsvd = 0; msg->setbaud.baud = cpu_to_le32(ESD_USB_NO_BAUDRATE); @@ -905,20 +900,21 @@ static const struct ethtool_ops esd_usb_ethtool_ops = { .get_ts_info = ethtool_op_get_ts_info, }; -static const struct can_bittiming_const esd_usb2_bittiming_const = { - .name = "esd_usb2", - .tseg1_min = ESD_USB2_TSEG1_MIN, - .tseg1_max = ESD_USB2_TSEG1_MAX, - .tseg2_min = ESD_USB2_TSEG2_MIN, - .tseg2_max = ESD_USB2_TSEG2_MAX, - .sjw_max = ESD_USB2_SJW_MAX, - .brp_min = ESD_USB2_BRP_MIN, - .brp_max = ESD_USB2_BRP_MAX, - .brp_inc = ESD_USB2_BRP_INC, +static const struct can_bittiming_const esd_usb_2_bittiming_const = { + .name = "esd_usb_2", + .tseg1_min = 1, + .tseg1_max = 16, + .tseg2_min = 1, + .tseg2_max = 8, + .sjw_max = 4, + .brp_min = 1, + .brp_max = 1024, + .brp_inc = 1, }; -static int esd_usb2_set_bittiming(struct net_device *netdev) +static int esd_usb_2_set_bittiming(struct net_device *netdev) { + const struct can_bittiming_const *btc = &esd_usb_2_bittiming_const; struct esd_usb_net_priv *priv = netdev_priv(netdev); struct can_bittiming *bt = &priv->can.bittiming; union esd_usb_msg *msg; @@ -930,35 +926,35 @@ static int esd_usb2_set_bittiming(struct net_device *netdev) if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) canbtr |= ESD_USB_LOM; - canbtr |= (bt->brp - 1) & (ESD_USB2_BRP_MAX - 1); + canbtr |= (bt->brp - 1) & (btc->brp_max - 1); if (le16_to_cpu(priv->usb->udev->descriptor.idProduct) == - USB_CANUSBM_PRODUCT_ID) - sjw_shift = ESD_USBM_SJW_SHIFT; + ESD_USB_CANUSBM_PRODUCT_ID) + sjw_shift = ESD_USB_M_SJW_SHIFT; else - sjw_shift = ESD_USB2_SJW_SHIFT; + sjw_shift = ESD_USB_2_SJW_SHIFT; - canbtr |= ((bt->sjw - 1) & (ESD_USB2_SJW_MAX - 1)) + canbtr |= ((bt->sjw - 1) & (btc->sjw_max - 1)) << sjw_shift; canbtr |= ((bt->prop_seg + bt->phase_seg1 - 1) - & (ESD_USB2_TSEG1_MAX - 1)) - << ESD_USB2_TSEG1_SHIFT; - canbtr |= ((bt->phase_seg2 - 1) & (ESD_USB2_TSEG2_MAX - 1)) - << ESD_USB2_TSEG2_SHIFT; + & (btc->tseg1_max - 1)) + << ESD_USB_2_TSEG1_SHIFT; + canbtr |= ((bt->phase_seg2 - 1) & (btc->tseg2_max - 1)) + << ESD_USB_2_TSEG2_SHIFT; if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) - canbtr |= ESD_USB2_3_SAMPLES; + canbtr |= ESD_USB_TRIPLE_SAMPLES; msg = kmalloc(sizeof(*msg), GFP_KERNEL); if (!msg) return -ENOMEM; - msg->hdr.len = 2; - msg->hdr.cmd = CMD_SETBAUD; + msg->hdr.len = sizeof(struct esd_usb_set_baudrate_msg) / sizeof(u32); /* # of 32bit words */ + msg->hdr.cmd = ESD_USB_CMD_SETBAUD; msg->setbaud.net = priv->index; msg->setbaud.rsvd = 0; msg->setbaud.baud = cpu_to_le32(canbtr); - netdev_info(netdev, "setting BTR=%#x\n", canbtr); + netdev_dbg(netdev, "setting BTR=%#x\n", canbtr); err = esd_usb_send_msg(priv->usb, msg); @@ -999,7 +995,7 @@ static int esd_usb_probe_one_net(struct usb_interface *intf, int index) int err = 0; int i; - netdev = alloc_candev(sizeof(*priv), MAX_TX_URBS); + netdev = alloc_candev(sizeof(*priv), ESD_USB_MAX_TX_URBS); if (!netdev) { dev_err(&intf->dev, "couldn't alloc candev\n"); err = -ENOMEM; @@ -1011,8 +1007,8 @@ static int esd_usb_probe_one_net(struct usb_interface *intf, int index) init_usb_anchor(&priv->tx_submitted); atomic_set(&priv->active_tx_jobs, 0); - for (i = 0; i < MAX_TX_URBS; i++) - priv->tx_contexts[i].echo_index = MAX_TX_URBS; + for (i = 0; i < ESD_USB_MAX_TX_URBS; i++) + priv->tx_contexts[i].echo_index = ESD_USB_MAX_TX_URBS; priv->usb = dev; priv->netdev = netdev; @@ -1024,15 +1020,15 @@ static int esd_usb_probe_one_net(struct usb_interface *intf, int index) CAN_CTRLMODE_BERR_REPORTING; if (le16_to_cpu(dev->udev->descriptor.idProduct) == - USB_CANUSBM_PRODUCT_ID) - priv->can.clock.freq = ESD_USBM_CAN_CLOCK; + ESD_USB_CANUSBM_PRODUCT_ID) + priv->can.clock.freq = ESD_USB_M_CAN_CLOCK; else { - priv->can.clock.freq = ESD_USB2_CAN_CLOCK; + priv->can.clock.freq = ESD_USB_2_CAN_CLOCK; priv->can.ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES; } - priv->can.bittiming_const = &esd_usb2_bittiming_const; - priv->can.do_set_bittiming = esd_usb2_set_bittiming; + priv->can.bittiming_const = &esd_usb_2_bittiming_const; + priv->can.do_set_bittiming = esd_usb_2_set_bittiming; priv->can.do_set_mode = esd_usb_set_mode; priv->can.do_get_berr_counter = esd_usb_get_berr_counter; @@ -1090,8 +1086,8 @@ static int esd_usb_probe(struct usb_interface *intf, } /* query number of CAN interfaces (nets) */ - msg->hdr.cmd = CMD_VERSION; - msg->hdr.len = 2; + msg->hdr.cmd = ESD_USB_CMD_VERSION; + msg->hdr.len = sizeof(struct esd_usb_version_msg) / sizeof(u32); /* # of 32bit words */ msg->version.rsvd = 0; msg->version.flags = 0; msg->version.drv_version = 0; diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c index 7135ec851341..71ef4db5c09f 100644 --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c @@ -816,7 +816,7 @@ static int kvaser_usb_init_one(struct kvaser_usb *dev, int channel) init_completion(&priv->stop_comp); init_completion(&priv->flush_comp); init_completion(&priv->get_busparams_comp); - priv->can.ctrlmode_supported = 0; + priv->can.ctrlmode_supported = CAN_CTRLMODE_CC_LEN8_DLC; priv->dev = dev; priv->netdev = netdev; diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c index ef341c4254fc..c7ba768dfe17 100644 --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c @@ -1263,7 +1263,7 @@ static void kvaser_usb_hydra_rx_msg_std(const struct kvaser_usb *dev, if (flags & KVASER_USB_HYDRA_CF_FLAG_OVERRUN) kvaser_usb_can_rx_over_error(priv->netdev); - cf->len = can_cc_dlc2len(cmd->rx_can.dlc); + can_frame_set_cc_len((struct can_frame *)cf, cmd->rx_can.dlc, priv->can.ctrlmode); if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME) { cf->can_id |= CAN_RTR_FLAG; @@ -1342,7 +1342,7 @@ static void kvaser_usb_hydra_rx_msg_ext(const struct kvaser_usb *dev, if (flags & KVASER_USB_HYDRA_CF_FLAG_ESI) cf->flags |= CANFD_ESI; } else { - cf->len = can_cc_dlc2len(dlc); + can_frame_set_cc_len((struct can_frame *)cf, dlc, priv->can.ctrlmode); } if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME) { @@ -1442,7 +1442,7 @@ kvaser_usb_hydra_frame_to_cmd_ext(const struct kvaser_usb_net_priv *priv, struct kvaser_usb *dev = priv->dev; struct kvaser_cmd_ext *cmd; struct canfd_frame *cf = (struct canfd_frame *)skb->data; - u8 dlc = can_fd_len2dlc(cf->len); + u8 dlc; u8 nbr_of_bytes = cf->len; u32 flags; u32 id; @@ -1467,6 +1467,11 @@ kvaser_usb_hydra_frame_to_cmd_ext(const struct kvaser_usb_net_priv *priv, cmd->len = cpu_to_le16(*cmd_len); + if (can_is_canfd_skb(skb)) + dlc = can_fd_len2dlc(cf->len); + else + dlc = can_get_cc_dlc((struct can_frame *)cf, priv->can.ctrlmode); + cmd->tx_can.databytes = nbr_of_bytes; cmd->tx_can.dlc = dlc; @@ -1542,7 +1547,7 @@ kvaser_usb_hydra_frame_to_cmd_std(const struct kvaser_usb_net_priv *priv, id = cf->can_id & CAN_SFF_MASK; } - cmd->tx_can.dlc = cf->len; + cmd->tx_can.dlc = can_get_cc_dlc(cf, priv->can.ctrlmode); flags = (cf->can_id & CAN_EFF_FLAG ? KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID : 0); 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 1c2f99ce4c6c..23bd7574b1c7 100644 --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c @@ -573,7 +573,7 @@ kvaser_usb_leaf_frame_to_cmd(const struct kvaser_usb_net_priv *priv, cmd->u.tx_can.data[1] = cf->can_id & 0x3f; } - cmd->u.tx_can.data[5] = cf->len; + cmd->u.tx_can.data[5] = can_get_cc_dlc(cf, priv->can.ctrlmode); memcpy(&cmd->u.tx_can.data[6], cf->data, cf->len); if (cf->can_id & CAN_RTR_FLAG) @@ -1349,7 +1349,7 @@ static void kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb *dev, else cf->can_id &= CAN_SFF_MASK; - cf->len = can_cc_dlc2len(cmd->u.leaf.log_message.dlc); + can_frame_set_cc_len(cf, cmd->u.leaf.log_message.dlc & 0xF, priv->can.ctrlmode); if (cmd->u.leaf.log_message.flags & MSG_FLAG_REMOTE_FRAME) cf->can_id |= CAN_RTR_FLAG; @@ -1367,7 +1367,7 @@ static void kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb *dev, cf->can_id |= CAN_EFF_FLAG; } - cf->len = can_cc_dlc2len(rx_data[5]); + can_frame_set_cc_len(cf, rx_data[5] & 0xF, priv->can.ctrlmode); if (cmd->u.rx_can_header.flag & MSG_FLAG_REMOTE_FRAME) cf->can_id |= CAN_RTR_FLAG; diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c index 797c69a0314d..4d3283db3a13 100644 --- a/drivers/net/can/xilinx_can.c +++ b/drivers/net/can/xilinx_can.c @@ -28,6 +28,7 @@ #include <linux/types.h> #include <linux/can/dev.h> #include <linux/can/error.h> +#include <linux/phy/phy.h> #include <linux/pm_runtime.h> #define DRIVER_NAME "xilinx_can" @@ -198,6 +199,7 @@ struct xcan_devtype_data { * @bus_clk: Pointer to struct clk * @can_clk: Pointer to struct clk * @devtype: Device type specific constants + * @transceiver: Optional pointer to associated CAN transceiver */ struct xcan_priv { struct can_priv can; @@ -215,6 +217,7 @@ struct xcan_priv { struct clk *bus_clk; struct clk *can_clk; struct xcan_devtype_data devtype; + struct phy *transceiver; }; /* CAN Bittiming constants as per Xilinx CAN specs */ @@ -1419,6 +1422,10 @@ static int xcan_open(struct net_device *ndev) struct xcan_priv *priv = netdev_priv(ndev); int ret; + ret = phy_power_on(priv->transceiver); + if (ret) + return ret; + ret = pm_runtime_get_sync(priv->dev); if (ret < 0) { netdev_err(ndev, "%s: pm_runtime_get failed(%d)\n", @@ -1462,6 +1469,7 @@ err_irq: free_irq(ndev->irq, ndev); err: pm_runtime_put(priv->dev); + phy_power_off(priv->transceiver); return ret; } @@ -1483,6 +1491,7 @@ static int xcan_close(struct net_device *ndev) close_candev(ndev); pm_runtime_put(priv->dev); + phy_power_off(priv->transceiver); return 0; } @@ -1713,6 +1722,7 @@ static int xcan_probe(struct platform_device *pdev) { struct net_device *ndev; struct xcan_priv *priv; + struct phy *transceiver; const struct of_device_id *of_id; const struct xcan_devtype_data *devtype = &xcan_axi_data; void __iomem *addr; @@ -1843,6 +1853,14 @@ static int xcan_probe(struct platform_device *pdev) goto err_free; } + transceiver = devm_phy_optional_get(&pdev->dev, NULL); + if (IS_ERR(transceiver)) { + ret = PTR_ERR(transceiver); + dev_err_probe(&pdev->dev, ret, "failed to get phy\n"); + goto err_free; + } + priv->transceiver = transceiver; + priv->write_reg = xcan_write_reg_le; priv->read_reg = xcan_read_reg_le; @@ -1869,6 +1887,7 @@ static int xcan_probe(struct platform_device *pdev) goto err_disableclks; } + of_can_transceiver(ndev); pm_runtime_put(&pdev->dev); if (priv->devtype.flags & XCAN_FLAG_CANFD_2) { diff --git a/include/linux/can/length.h b/include/linux/can/length.h index 69336549d24f..abc978b38f79 100644 --- a/include/linux/can/length.h +++ b/include/linux/can/length.h @@ -1,129 +1,258 @@ /* SPDX-License-Identifier: GPL-2.0 */ /* Copyright (C) 2020 Oliver Hartkopp <socketcan@hartkopp.net> * Copyright (C) 2020 Marc Kleine-Budde <kernel@pengutronix.de> + * Copyright (C) 2020, 2023 Vincent Mailhol <mailhol.vincent@wanadoo.fr> */ #ifndef _CAN_LENGTH_H #define _CAN_LENGTH_H +#include <linux/bits.h> #include <linux/can.h> #include <linux/can/netlink.h> +#include <linux/math.h> /* - * Size of a Classical CAN Standard Frame + * Size of a Classical CAN Standard Frame header in bits * - * Name of Field Bits + * Name of Field Bits * --------------------------------------------------------- - * Start-of-frame 1 - * Identifier 11 - * Remote transmission request (RTR) 1 - * Identifier extension bit (IDE) 1 - * Reserved bit (r0) 1 - * Data length code (DLC) 4 - * Data field 0...64 - * CRC 15 - * CRC delimiter 1 - * ACK slot 1 - * ACK delimiter 1 - * End-of-frame (EOF) 7 - * Inter frame spacing 3 + * Start Of Frame (SOF) 1 + * Arbitration field: + * base ID 11 + * Remote Transmission Request (RTR) 1 + * Control field: + * IDentifier Extension bit (IDE) 1 + * FD Format indicator (FDF) 1 + * Data Length Code (DLC) 4 + * + * including all fields preceding the data field, ignoring bitstuffing + */ +#define CAN_FRAME_HEADER_SFF_BITS 19 + +/* + * Size of a Classical CAN Extended Frame header in bits * - * rounded up and ignoring bitstuffing + * Name of Field Bits + * --------------------------------------------------------- + * Start Of Frame (SOF) 1 + * Arbitration field: + * base ID 11 + * Substitute Remote Request (SRR) 1 + * IDentifier Extension bit (IDE) 1 + * ID extension 18 + * Remote Transmission Request (RTR) 1 + * Control field: + * FD Format indicator (FDF) 1 + * Reserved bit (r0) 1 + * Data length code (DLC) 4 + * + * including all fields preceding the data field, ignoring bitstuffing */ -#define CAN_FRAME_OVERHEAD_SFF DIV_ROUND_UP(47, 8) +#define CAN_FRAME_HEADER_EFF_BITS 39 /* - * Size of a Classical CAN Extended Frame + * Size of a CAN-FD Standard Frame in bits + * + * Name of Field Bits + * --------------------------------------------------------- + * Start Of Frame (SOF) 1 + * Arbitration field: + * base ID 11 + * Remote Request Substitution (RRS) 1 + * Control field: + * IDentifier Extension bit (IDE) 1 + * FD Format indicator (FDF) 1 + * Reserved bit (res) 1 + * Bit Rate Switch (BRS) 1 + * Error Status Indicator (ESI) 1 + * Data length code (DLC) 4 + * + * including all fields preceding the data field, ignoring bitstuffing + */ +#define CANFD_FRAME_HEADER_SFF_BITS 22 + +/* + * Size of a CAN-FD Extended Frame in bits + * + * Name of Field Bits + * --------------------------------------------------------- + * Start Of Frame (SOF) 1 + * Arbitration field: + * base ID 11 + * Substitute Remote Request (SRR) 1 + * IDentifier Extension bit (IDE) 1 + * ID extension 18 + * Remote Request Substitution (RRS) 1 + * Control field: + * FD Format indicator (FDF) 1 + * Reserved bit (res) 1 + * Bit Rate Switch (BRS) 1 + * Error Status Indicator (ESI) 1 + * Data length code (DLC) 4 + * + * including all fields preceding the data field, ignoring bitstuffing + */ +#define CANFD_FRAME_HEADER_EFF_BITS 41 + +/* + * Size of a CAN CRC Field in bits * * Name of Field Bits * --------------------------------------------------------- - * Start-of-frame 1 - * Identifier A 11 - * Substitute remote request (SRR) 1 - * Identifier extension bit (IDE) 1 - * Identifier B 18 - * Remote transmission request (RTR) 1 - * Reserved bits (r1, r0) 2 - * Data length code (DLC) 4 - * Data field 0...64 - * CRC 15 - * CRC delimiter 1 - * ACK slot 1 - * ACK delimiter 1 - * End-of-frame (EOF) 7 - * Inter frame spacing 3 + * CRC sequence (CRC15) 15 + * CRC Delimiter 1 + * + * ignoring bitstuffing + */ +#define CAN_FRAME_CRC_FIELD_BITS 16 + +/* + * Size of a CAN-FD CRC17 Field in bits (length: 0..16) * - * rounded up and ignoring bitstuffing + * Name of Field Bits + * --------------------------------------------------------- + * Stuff Count 4 + * CRC Sequence (CRC17) 17 + * CRC Delimiter 1 + * Fixed stuff bits 6 */ -#define CAN_FRAME_OVERHEAD_EFF DIV_ROUND_UP(67, 8) +#define CANFD_FRAME_CRC17_FIELD_BITS 28 /* - * Size of a CAN-FD Standard Frame + * Size of a CAN-FD CRC21 Field in bits (length: 20..64) * * Name of Field Bits * --------------------------------------------------------- - * Start-of-frame 1 - * Identifier 11 - * Reserved bit (r1) 1 - * Identifier extension bit (IDE) 1 - * Flexible data rate format (FDF) 1 - * Reserved bit (r0) 1 - * Bit Rate Switch (BRS) 1 - * Error Status Indicator (ESI) 1 - * Data length code (DLC) 4 - * Data field 0...512 - * Stuff Bit Count (SBC) 0...16: 4 20...64:5 - * CRC 0...16: 17 20...64:21 - * CRC delimiter (CD) 1 - * ACK slot (AS) 1 - * ACK delimiter (AD) 1 - * End-of-frame (EOF) 7 - * Inter frame spacing 3 - * - * assuming CRC21, rounded up and ignoring bitstuffing - */ -#define CANFD_FRAME_OVERHEAD_SFF DIV_ROUND_UP(61, 8) + * Stuff Count 4 + * CRC sequence (CRC21) 21 + * CRC Delimiter 1 + * Fixed stuff bits 7 + */ +#define CANFD_FRAME_CRC21_FIELD_BITS 33 /* - * Size of a CAN-FD Extended Frame + * Size of a CAN(-FD) Frame footer in bits * * Name of Field Bits * --------------------------------------------------------- - * Start-of-frame 1 - * Identifier A 11 - * Substitute remote request (SRR) 1 - * Identifier extension bit (IDE) 1 - * Identifier B 18 - * Reserved bit (r1) 1 - * Flexible data rate format (FDF) 1 - * Reserved bit (r0) 1 - * Bit Rate Switch (BRS) 1 - * Error Status Indicator (ESI) 1 - * Data length code (DLC) 4 - * Data field 0...512 - * Stuff Bit Count (SBC) 0...16: 4 20...64:5 - * CRC 0...16: 17 20...64:21 - * CRC delimiter (CD) 1 - * ACK slot (AS) 1 - * ACK delimiter (AD) 1 - * End-of-frame (EOF) 7 - * Inter frame spacing 3 - * - * assuming CRC21, rounded up and ignoring bitstuffing - */ -#define CANFD_FRAME_OVERHEAD_EFF DIV_ROUND_UP(80, 8) + * ACK slot 1 + * ACK delimiter 1 + * End Of Frame (EOF) 7 + * + * including all fields following the CRC field + */ +#define CAN_FRAME_FOOTER_BITS 9 + +/* + * First part of the Inter Frame Space + * (a.k.a. IMF - intermission field) + */ +#define CAN_INTERMISSION_BITS 3 + +/** + * can_bitstuffing_len() - Calculate the maximum length with bitstuffing + * @destuffed_len: length of a destuffed bit stream + * + * The worst bit stuffing case is a sequence in which dominant and + * recessive bits alternate every four bits: + * + * Destuffed: 1 1111 0000 1111 0000 1111 + * Stuffed: 1 1111o 0000i 1111o 0000i 1111o + * + * Nomenclature + * + * - "0": dominant bit + * - "o": dominant stuff bit + * - "1": recessive bit + * - "i": recessive stuff bit + * + * Aside from the first bit, one stuff bit is added every four bits. + * + * Return: length of the stuffed bit stream in the worst case scenario. + */ +#define can_bitstuffing_len(destuffed_len) \ + (destuffed_len + (destuffed_len - 1) / 4) + +#define __can_bitstuffing_len(bitstuffing, destuffed_len) \ + (bitstuffing ? can_bitstuffing_len(destuffed_len) : \ + destuffed_len) + +#define __can_cc_frame_bits(is_eff, bitstuffing, \ + intermission, data_len) \ +( \ + __can_bitstuffing_len(bitstuffing, \ + (is_eff ? CAN_FRAME_HEADER_EFF_BITS : \ + CAN_FRAME_HEADER_SFF_BITS) + \ + (data_len) * BITS_PER_BYTE + \ + CAN_FRAME_CRC_FIELD_BITS) + \ + CAN_FRAME_FOOTER_BITS + \ + (intermission ? CAN_INTERMISSION_BITS : 0) \ +) + +#define __can_fd_frame_bits(is_eff, bitstuffing, \ + intermission, data_len) \ +( \ + __can_bitstuffing_len(bitstuffing, \ + (is_eff ? CANFD_FRAME_HEADER_EFF_BITS : \ + CANFD_FRAME_HEADER_SFF_BITS) + \ + (data_len) * BITS_PER_BYTE) + \ + ((data_len) <= 16 ? \ + CANFD_FRAME_CRC17_FIELD_BITS : \ + CANFD_FRAME_CRC21_FIELD_BITS) + \ + CAN_FRAME_FOOTER_BITS + \ + (intermission ? CAN_INTERMISSION_BITS : 0) \ +) + +/** + * can_frame_bits() - Calculate the number of bits on the wire in a + * CAN frame + * @is_fd: true: CAN-FD frame; false: Classical CAN frame. + * @is_eff: true: Extended frame; false: Standard frame. + * @bitstuffing: true: calculate the bitstuffing worst case; false: + * calculate the bitstuffing best case (no dynamic + * bitstuffing). CAN-FD's fixed stuff bits are always included. + * @intermission: if and only if true, include the inter frame space + * assuming no bus idle (i.e. only the intermission). Strictly + * speaking, the inter frame space is not part of the + * frame. However, it is needed when calculating the delay + * between the Start Of Frame of two consecutive frames. + * @data_len: length of the data field in bytes. Correspond to + * can(fd)_frame->len. Should be zero for remote frames. No + * sanitization is done on @data_len and it shall have no side + * effects. + * + * Return: the numbers of bits on the wire of a CAN frame. + */ +#define can_frame_bits(is_fd, is_eff, bitstuffing, \ + intermission, data_len) \ +( \ + is_fd ? __can_fd_frame_bits(is_eff, bitstuffing, \ + intermission, data_len) : \ + __can_cc_frame_bits(is_eff, bitstuffing, \ + intermission, data_len) \ +) + +/* + * Number of bytes in a CAN frame + * (rounded up, including intermission) + */ +#define can_frame_bytes(is_fd, is_eff, bitstuffing, data_len) \ + DIV_ROUND_UP(can_frame_bits(is_fd, is_eff, bitstuffing, \ + true, data_len), \ + BITS_PER_BYTE) /* * Maximum size of a Classical CAN frame - * (rounded up and ignoring bitstuffing) + * (rounded up, ignoring bitstuffing but including intermission) */ -#define CAN_FRAME_LEN_MAX (CAN_FRAME_OVERHEAD_EFF + CAN_MAX_DLEN) +#define CAN_FRAME_LEN_MAX can_frame_bytes(false, true, false, CAN_MAX_DLEN) /* * Maximum size of a CAN-FD frame - * (rounded up and ignoring bitstuffing) + * (rounded up, ignoring dynamic bitstuffing but including intermission) */ -#define CANFD_FRAME_LEN_MAX (CANFD_FRAME_OVERHEAD_EFF + CANFD_MAX_DLEN) +#define CANFD_FRAME_LEN_MAX can_frame_bytes(true, true, false, CANFD_MAX_DLEN) /* * can_cc_dlc2len(value) - convert a given data length code (dlc) of a diff --git a/include/uapi/linux/can.h b/include/uapi/linux/can.h index dd645ea72306..939db2388208 100644 --- a/include/uapi/linux/can.h +++ b/include/uapi/linux/can.h @@ -285,6 +285,5 @@ struct can_filter { }; #define CAN_INV_FILTER 0x20000000U /* to be set in can_filter.can_id */ -#define CAN_RAW_FILTER_MAX 512 /* maximum number of can_filter set via setsockopt() */ #endif /* !_UAPI_CAN_H */ diff --git a/include/uapi/linux/can/raw.h b/include/uapi/linux/can/raw.h index ff12f525c37c..31622c9b7988 100644 --- a/include/uapi/linux/can/raw.h +++ b/include/uapi/linux/can/raw.h @@ -49,6 +49,8 @@ #include <linux/can.h> #define SOL_CAN_RAW (SOL_CAN_BASE + CAN_RAW) +#define CAN_RAW_FILTER_MAX 512 /* maximum number of can_filter set via setsockopt() */ + enum { SCM_CAN_RAW_ERRQUEUE = 1, }; |