@@ -1330,11 +1330,11 @@ payload. The representation of this length in can_frame.can_dlc and
canfd_frame.len for userspace applications and inside the Linux network
layer is a plain value from 0 .. 64 instead of the CAN 'data length code'.
The data length code was a 1:1 mapping to the payload length in the legacy
CAN frames anyway. The payload length to the bus-relevant DLC mapping is
only performed inside the CAN drivers, preferably with the helper
-functions can_dlc2len() and can_len2dlc().
+functions can_fd_dlc2len() and can_fd_len2dlc().
The CAN netdevice driver capabilities can be distinguished by the network
devices maximum transfer unit (MTU)::
MTU = 16 (CAN_MTU) => sizeof(struct can_frame) => 'legacy' CAN device
@@ -29,15 +29,15 @@ MODULE_AUTHOR("Wolfgang Grandegger <wg@grandegger.com>");
static const u8 dlc2len[] = {0, 1, 2, 3, 4, 5, 6, 7,
8, 12, 16, 20, 24, 32, 48, 64};
/* get data length from raw data length code (DLC) */
-u8 can_dlc2len(u8 dlc)
+u8 can_fd_dlc2len(u8 dlc)
{
return dlc2len[dlc & 0x0F];
}
-EXPORT_SYMBOL_GPL(can_dlc2len);
+EXPORT_SYMBOL_GPL(can_fd_dlc2len);
static const u8 len2dlc[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, /* 0 - 8 */
9, 9, 9, 9, /* 9 - 12 */
10, 10, 10, 10, /* 13 - 16 */
11, 11, 11, 11, /* 17 - 20 */
@@ -47,18 +47,18 @@ static const u8 len2dlc[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, /* 0 - 8 */
14, 14, 14, 14, 14, 14, 14, 14, /* 41 - 48 */
15, 15, 15, 15, 15, 15, 15, 15, /* 49 - 56 */
15, 15, 15, 15, 15, 15, 15, 15}; /* 57 - 64 */
/* map the sanitized data length to an appropriate data length code */
-u8 can_len2dlc(u8 len)
+u8 can_fd_len2dlc(u8 len)
{
if (unlikely(len > 64))
return 0xF;
return len2dlc[len];
}
-EXPORT_SYMBOL_GPL(can_len2dlc);
+EXPORT_SYMBOL_GPL(can_fd_len2dlc);
#ifdef CONFIG_CAN_CALC_BITTIMING
#define CAN_CALC_MAX_ERROR 50 /* in one-tenth of a percent */
/* Bit-timing calculation derived from:
@@ -742,11 +742,11 @@ static netdev_tx_t flexcan_start_xmit(struct sk_buff *skb, struct net_device *de
{
const struct flexcan_priv *priv = netdev_priv(dev);
struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
u32 can_id;
u32 data;
- u32 ctrl = FLEXCAN_MB_CODE_TX_DATA | ((can_len2dlc(cfd->len)) << 16);
+ u32 ctrl = FLEXCAN_MB_CODE_TX_DATA | ((can_fd_len2dlc(cfd->len)) << 16);
int i;
if (can_dropped_invalid_skb(dev, skb))
return NETDEV_TX_OK;
@@ -996,11 +996,11 @@ static struct sk_buff *flexcan_mailbox_read(struct can_rx_offload *offload,
cfd->can_id = ((reg_id >> 0) & CAN_EFF_MASK) | CAN_EFF_FLAG;
else
cfd->can_id = (reg_id >> 18) & CAN_SFF_MASK;
if (reg_ctrl & FLEXCAN_MB_CNT_EDL) {
- cfd->len = can_dlc2len((reg_ctrl >> 16) & 0xf);
+ cfd->len = can_fd_dlc2len((reg_ctrl >> 16) & 0xf);
if (reg_ctrl & FLEXCAN_MB_CNT_BRS)
cfd->flags |= CANFD_BRS;
} else {
cfd->len = can_cc_dlc2len((reg_ctrl >> 16) & 0xf);
@@ -269,11 +269,11 @@ static void ifi_canfd_read_fifo(struct net_device *ndev)
}
dlc = (rxdlc >> IFI_CANFD_RXFIFO_DLC_DLC_OFFSET) &
IFI_CANFD_RXFIFO_DLC_DLC_MASK;
if (rxdlc & IFI_CANFD_RXFIFO_DLC_EDL)
- cf->len = can_dlc2len(dlc);
+ cf->len = can_fd_dlc2len(dlc);
else
cf->len = can_cc_dlc2len(dlc);
rxid = readl(priv->base + IFI_CANFD_RXFIFO_ID);
id = (rxid >> IFI_CANFD_RXFIFO_ID_ID_OFFSET);
@@ -898,11 +898,11 @@ static netdev_tx_t ifi_canfd_start_xmit(struct sk_buff *skb,
txid |= IFI_CANFD_TXFIFO_ID_IDE;
} else {
txid = cf->can_id & CAN_SFF_MASK;
}
- txdlc = can_len2dlc(cf->len);
+ txdlc = can_fd_len2dlc(cf->len);
if ((priv->can.ctrlmode & CAN_CTRLMODE_FD) && can_is_canfd_skb(skb)) {
txdlc |= IFI_CANFD_TXFIFO_DLC_EDL;
if (cf->flags & CANFD_BRS)
txdlc |= IFI_CANFD_TXFIFO_DLC_BRS;
}
@@ -738,11 +738,11 @@ 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_len2dlc(cf->len) << KVASER_PCIEFD_RPACKET_DLC_SHIFT;
+ p->header[1] |= can_fd_len2dlc(cf->len) << KVASER_PCIEFD_RPACKET_DLC_SHIFT;
p->header[1] |= KVASER_PCIEFD_TPACKET_AREQ;
if (can_is_canfd_skb(skb)) {
p->header[1] |= KVASER_PCIEFD_RPACKET_FDF;
if (cf->flags & CANFD_BRS)
@@ -1172,11 +1172,11 @@ static int kvaser_pciefd_handle_data_packet(struct kvaser_pciefd *pcie,
cf->can_id = p->header[0] & CAN_EFF_MASK;
if (p->header[0] & KVASER_PCIEFD_RPACKET_IDE)
cf->can_id |= CAN_EFF_FLAG;
- cf->len = can_dlc2len(p->header[1] >> KVASER_PCIEFD_RPACKET_DLC_SHIFT);
+ 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);
@@ -1598,11 +1598,11 @@ static int kvaser_pciefd_read_packet(struct kvaser_pciefd *pcie, int *start_pos,
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_dlc2len(p->header[1] >>
+ data_len = can_fd_dlc2len(p->header[1] >>
KVASER_PCIEFD_RPACKET_DLC_SHIFT);
pos += DIV_ROUND_UP(data_len, 4);
}
break;
@@ -455,11 +455,11 @@ static void m_can_read_fifo(struct net_device *dev, u32 rxfs)
stats->rx_dropped++;
return;
}
if (dlc & RX_BUF_FDF)
- cf->len = can_dlc2len((dlc >> 16) & 0x0F);
+ cf->len = can_fd_dlc2len((dlc >> 16) & 0x0F);
else
cf->len = can_cc_dlc2len((dlc >> 16) & 0x0F);
id = m_can_fifo_read(cdev, fgi, M_CAN_FIFO_ID);
if (id & RX_BUF_XTD)
@@ -1482,11 +1482,11 @@ static netdev_tx_t m_can_tx_handler(struct m_can_classdev *cdev)
netif_stop_queue(dev);
/* message ram configuration */
m_can_fifo_write(cdev, 0, M_CAN_FIFO_ID, id);
m_can_fifo_write(cdev, 0, M_CAN_FIFO_DLC,
- can_len2dlc(cf->len) << 16);
+ can_fd_len2dlc(cf->len) << 16);
for (i = 0; i < cf->len; i += 4)
m_can_fifo_write(cdev, 0,
M_CAN_FIFO_DATA(i / 4),
*(u32 *)(cf->data + i));
@@ -1550,11 +1550,11 @@ static netdev_tx_t m_can_tx_handler(struct m_can_classdev *cdev)
* sending the correct echo frame
*/
m_can_fifo_write(cdev, putidx, M_CAN_FIFO_DLC,
((putidx << TX_BUF_MM_SHIFT) &
TX_BUF_MM_MASK) |
- (can_len2dlc(cf->len) << 16) |
+ (can_fd_len2dlc(cf->len) << 16) |
fdflags | TX_BUF_EFC);
for (i = 0; i < cf->len; i += 4)
m_can_fifo_write(cdev, putidx, M_CAN_FIFO_DATA(i / 4),
*(u32 *)(cf->data + i));
@@ -255,11 +255,11 @@ static int pucan_handle_can_rx(struct peak_canfd_priv *priv,
struct sk_buff *skb;
const u16 rx_msg_flags = le16_to_cpu(msg->flags);
u8 cf_len;
if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN)
- cf_len = can_dlc2len(pucan_msg_get_dlc(msg));
+ cf_len = can_fd_dlc2len(pucan_msg_get_dlc(msg));
else
cf_len = can_cc_dlc2len(pucan_msg_get_dlc(msg));
/* if this frame is an echo, */
if (rx_msg_flags & PUCAN_MSG_LOOPED_BACK) {
@@ -680,11 +680,11 @@ static netdev_tx_t peak_canfd_start_xmit(struct sk_buff *skb,
msg->can_id = cpu_to_le32(cf->can_id & CAN_SFF_MASK);
}
if (can_is_canfd_skb(skb)) {
/* CAN FD frame format */
- len = can_len2dlc(cf->len);
+ len = can_fd_len2dlc(cf->len);
msg_flags |= PUCAN_MSG_EXT_DATA_LEN;
if (cf->flags & CANFD_BRS)
msg_flags |= PUCAN_MSG_BITRATE_SWITCH;
@@ -1355,11 +1355,11 @@ static netdev_tx_t rcar_canfd_start_xmit(struct sk_buff *skb,
}
if (cf->can_id & CAN_RTR_FLAG)
id |= RCANFD_CFID_CFRTR;
- dlc = RCANFD_CFPTR_CFDLC(can_len2dlc(cf->len));
+ dlc = RCANFD_CFPTR_CFDLC(can_fd_len2dlc(cf->len));
if (priv->can.ctrlmode & CAN_CTRLMODE_FD) {
rcar_canfd_write(priv->base,
RCANFD_F_CFID(ch, RCANFD_CFFIFO_IDX), id);
rcar_canfd_write(priv->base,
@@ -1444,11 +1444,11 @@ static void rcar_canfd_rx_pkt(struct rcar_canfd_channel *priv)
else
cf->can_id = id & CAN_SFF_MASK;
if (priv->can.ctrlmode & CAN_CTRLMODE_FD) {
if (sts & RCANFD_RFFDSTS_RFFDF)
- cf->len = can_dlc2len(RCANFD_RFPTR_RFDLC(dlc));
+ cf->len = can_fd_dlc2len(RCANFD_RFPTR_RFDLC(dlc));
else
cf->len = can_cc_dlc2len(RCANFD_RFPTR_RFDLC(dlc));
if (sts & RCANFD_RFFDSTS_RFESI) {
cf->flags |= CANFD_ESI;
@@ -1403,11 +1403,11 @@ mcp251xfd_hw_rx_obj_to_skb(const struct mcp251xfd_priv *priv,
if (hw_rx_obj->flags & MCP251XFD_OBJ_FLAGS_BRS)
cfd->flags |= CANFD_BRS;
dlc = FIELD_GET(MCP251XFD_OBJ_FLAGS_DLC, hw_rx_obj->flags);
- cfd->len = can_dlc2len(dlc);
+ cfd->len = can_fd_dlc2len(dlc);
} else {
if (hw_rx_obj->flags & MCP251XFD_OBJ_FLAGS_RTR)
cfd->can_id |= CAN_RTR_FLAG;
cfd->len = can_cc_dlc2len(FIELD_GET(MCP251XFD_OBJ_FLAGS_DLC,
@@ -2242,11 +2242,11 @@ mcp251xfd_tx_obj_from_skb(const struct mcp251xfd_priv *priv,
/* Use the MCP2518FD mask even on the MCP2517FD. It doesn't
* harm, only the lower 7 bits will be transferred into the
* TEF object.
*/
- dlc = can_len2dlc(cfd->len);
+ dlc = can_fd_len2dlc(cfd->len);
flags |= FIELD_PREP(MCP251XFD_OBJ_FLAGS_SEQ_MCP2518FD_MASK, seq) |
FIELD_PREP(MCP251XFD_OBJ_FLAGS_DLC, dlc);
if (cfd->can_id & CAN_RTR_FLAG)
flags |= MCP251XFD_OBJ_FLAGS_RTR;
@@ -2271,19 +2271,19 @@ mcp251xfd_tx_obj_from_skb(const struct mcp251xfd_priv *priv,
put_unaligned_le32(id, &hw_tx_obj->id);
put_unaligned_le32(flags, &hw_tx_obj->flags);
/* Clear data at end of CAN frame */
offset = round_down(cfd->len, sizeof(u32));
- len = round_up(can_dlc2len(dlc), sizeof(u32)) - offset;
+ len = round_up(can_fd_dlc2len(dlc), sizeof(u32)) - offset;
if (MCP251XFD_SANITIZE_CAN && len)
memset(hw_tx_obj->data + offset, 0x0, len);
memcpy(hw_tx_obj->data, cfd->data, cfd->len);
/* Number of bytes to be written into the RAM of the controller */
len = sizeof(hw_tx_obj->id) + sizeof(hw_tx_obj->flags);
if (MCP251XFD_SANITIZE_CAN)
- len += round_up(can_dlc2len(dlc), sizeof(u32));
+ len += round_up(can_fd_dlc2len(dlc), sizeof(u32));
else
len += round_up(cfd->len, sizeof(u32));
if (priv->devtype_data.quirks & MCP251XFD_QUIRK_CRC_TX) {
u16 crc;
@@ -1118,11 +1118,11 @@ static void kvaser_usb_hydra_tx_acknowledge(const struct kvaser_usb *dev,
context = &priv->tx_contexts[transid % dev->max_tx_urbs];
if (!one_shot_fail) {
struct net_device_stats *stats = &priv->netdev->stats;
stats->tx_packets++;
- stats->tx_bytes += can_dlc2len(context->dlc);
+ stats->tx_bytes += can_fd_dlc2len(context->dlc);
}
spin_lock_irqsave(&priv->tx_contexts_lock, irq_flags);
can_get_echo_skb(priv->netdev, context->echo_index);
@@ -1249,11 +1249,11 @@ static void kvaser_usb_hydra_rx_msg_ext(const struct kvaser_usb *dev,
if (flags & KVASER_USB_HYDRA_CF_FLAG_OVERRUN)
kvaser_usb_can_rx_over_error(priv->netdev);
if (flags & KVASER_USB_HYDRA_CF_FLAG_FDF) {
- cf->len = can_dlc2len(dlc);
+ cf->len = can_fd_dlc2len(dlc);
if (flags & KVASER_USB_HYDRA_CF_FLAG_BRS)
cf->flags |= CANFD_BRS;
if (flags & KVASER_USB_HYDRA_CF_FLAG_ESI)
cf->flags |= CANFD_ESI;
} else {
@@ -1349,11 +1349,11 @@ kvaser_usb_hydra_frame_to_cmd_ext(const struct kvaser_usb_net_priv *priv,
int *cmd_len, u16 transid)
{
struct kvaser_usb *dev = priv->dev;
struct kvaser_cmd_ext *cmd;
struct canfd_frame *cf = (struct canfd_frame *)skb->data;
- u8 dlc = can_len2dlc(cf->len);
+ u8 dlc = can_fd_len2dlc(cf->len);
u8 nbr_of_bytes = cf->len;
u32 flags;
u32 id;
u32 kcan_id;
u32 kcan_header;
@@ -490,11 +490,11 @@ static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if,
cfd->flags |= CANFD_BRS;
if (rx_msg_flags & PUCAN_MSG_ERROR_STATE_IND)
cfd->flags |= CANFD_ESI;
- cfd->len = can_dlc2len(pucan_msg_get_dlc(rm));
+ cfd->len = can_fd_dlc2len(pucan_msg_get_dlc(rm));
} else {
/* CAN 2.0 frame case */
skb = alloc_can_skb(netdev, (struct can_frame **)&cfd);
if (!skb)
return -ENOMEM;
@@ -754,11 +754,11 @@ static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev,
tx_msg->can_id = cpu_to_le32(cfd->can_id & CAN_SFF_MASK);
}
if (can_is_canfd_skb(skb)) {
/* considering a CANFD frame */
- len = can_len2dlc(cfd->len);
+ len = can_fd_len2dlc(cfd->len);
tx_msg_flags |= PUCAN_MSG_EXT_DATA_LEN;
if (cfd->flags & CANFD_BRS)
tx_msg_flags |= PUCAN_MSG_BITRATE_SWITCH;
@@ -581,11 +581,11 @@ static void xcan_write_frame(struct net_device *ndev, struct sk_buff *skb,
if (cf->can_id & CAN_RTR_FLAG)
/* Standard frames remote TX request */
id |= XCAN_IDR_SRR_MASK;
}
- dlc = can_len2dlc(cf->len) << XCAN_DLCR_DLC_SHIFT;
+ dlc = can_fd_len2dlc(cf->len) << XCAN_DLCR_DLC_SHIFT;
if (can_is_canfd_skb(skb)) {
if (cf->flags & CANFD_BRS)
dlc |= XCAN_DLCR_BRS_MASK;
dlc |= XCAN_DLCR_EDL_MASK;
}
@@ -830,11 +830,11 @@ static int xcanfd_rx(struct net_device *ndev, int frame_base)
/* Change Xilinx CANFD data length format to socketCAN data
* format
*/
if (dlc & XCAN_DLCR_EDL_MASK)
- cf->len = can_dlc2len((dlc & XCAN_DLCR_DLC_MASK) >>
+ cf->len = can_fd_dlc2len((dlc & XCAN_DLCR_DLC_MASK) >>
XCAN_DLCR_DLC_SHIFT);
else
cf->len = can_cc_dlc2len((dlc & XCAN_DLCR_DLC_MASK) >>
XCAN_DLCR_DLC_SHIFT);
@@ -184,14 +184,14 @@ static inline void can_set_static_ctrlmode(struct net_device *dev,
if (static_mode & CAN_CTRLMODE_FD)
dev->mtu = CANFD_MTU;
}
/* get data length from raw data length code (DLC) */
-u8 can_dlc2len(u8 dlc);
+u8 can_fd_dlc2len(u8 dlc);
/* map the sanitized data length to an appropriate data length code */
-u8 can_len2dlc(u8 len);
+u8 can_fd_len2dlc(u8 len);
struct net_device *alloc_candev_mqs(int sizeof_priv, unsigned int echo_skb_max,
unsigned int txqs, unsigned int rxqs);
#define alloc_candev(sizeof_priv, echo_skb_max) \
alloc_candev_mqs(sizeof_priv, echo_skb_max, 1, 1)
The helper functions can_len2dlc and can_dlc2len are only relevant for CAN FD data length code (DLC) conversion. To fit the introduced can_cc_dlc2len for Classical CAN we rename: can_dlc2len -> can_fd_dlc2len to get the payload length from the DLC can_len2dlc -> can_fd_len2dlc to get the DLC from the payload length Suggested-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr> Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> --- Documentation/networking/can.rst | 2 +- drivers/net/can/dev.c | 8 ++++---- drivers/net/can/flexcan.c | 4 ++-- drivers/net/can/ifi_canfd/ifi_canfd.c | 4 ++-- drivers/net/can/kvaser_pciefd.c | 6 +++--- drivers/net/can/m_can/m_can.c | 6 +++--- drivers/net/can/peak_canfd/peak_canfd.c | 4 ++-- drivers/net/can/rcar/rcar_canfd.c | 4 ++-- drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c | 8 ++++---- drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c | 6 +++--- drivers/net/can/usb/peak_usb/pcan_usb_fd.c | 4 ++-- drivers/net/can/xilinx_can.c | 4 ++-- include/linux/can/dev.h | 4 ++-- 13 files changed, 32 insertions(+), 32 deletions(-)