mcp251xfd.h (24436be590c6fbb05f6161b0dfba7d9da60214aa) mcp251xfd.h (b8e0ddd36ce9536ad7478dd27df06c9ae92370ba)
1/* SPDX-License-Identifier: GPL-2.0
2 *
3 * mcp251xfd - Microchip MCP251xFD Family CAN controller driver
4 *
5 * Copyright (c) 2019, 2020, 2021, 2023 Pengutronix,
6 * Marc Kleine-Budde <kernel@pengutronix.de>
7 * Copyright (c) 2019 Martin Sperl <kernel@martin.sperl.org>
8 */

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519};
520
521struct mcp251xfd_tef_ring {
522 unsigned int head;
523 unsigned int tail;
524
525 /* u8 obj_num equals tx_ring->obj_num */
526 /* u8 obj_size equals sizeof(struct mcp251xfd_hw_tef_obj) */
1/* SPDX-License-Identifier: GPL-2.0
2 *
3 * mcp251xfd - Microchip MCP251xFD Family CAN controller driver
4 *
5 * Copyright (c) 2019, 2020, 2021, 2023 Pengutronix,
6 * Marc Kleine-Budde <kernel@pengutronix.de>
7 * Copyright (c) 2019 Martin Sperl <kernel@martin.sperl.org>
8 */

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519};
520
521struct mcp251xfd_tef_ring {
522 unsigned int head;
523 unsigned int tail;
524
525 /* u8 obj_num equals tx_ring->obj_num */
526 /* u8 obj_size equals sizeof(struct mcp251xfd_hw_tef_obj) */
527 /* u8 obj_num_shift_to_u8 equals tx_ring->obj_num_shift_to_u8 */
527
528 union mcp251xfd_write_reg_buf irq_enable_buf;
529 struct spi_transfer irq_enable_xfer;
530 struct spi_message irq_enable_msg;
531
532 union mcp251xfd_write_reg_buf uinc_buf;
533 union mcp251xfd_write_reg_buf uinc_irq_disable_buf;
534 struct spi_transfer uinc_xfer[MCP251XFD_TX_OBJ_NUM_MAX];
535};
536
537struct mcp251xfd_tx_ring {
538 unsigned int head;
539 unsigned int tail;
540
541 u16 base;
542 u8 nr;
543 u8 fifo_nr;
544 u8 obj_num;
528
529 union mcp251xfd_write_reg_buf irq_enable_buf;
530 struct spi_transfer irq_enable_xfer;
531 struct spi_message irq_enable_msg;
532
533 union mcp251xfd_write_reg_buf uinc_buf;
534 union mcp251xfd_write_reg_buf uinc_irq_disable_buf;
535 struct spi_transfer uinc_xfer[MCP251XFD_TX_OBJ_NUM_MAX];
536};
537
538struct mcp251xfd_tx_ring {
539 unsigned int head;
540 unsigned int tail;
541
542 u16 base;
543 u8 nr;
544 u8 fifo_nr;
545 u8 obj_num;
546 u8 obj_num_shift_to_u8;
545 u8 obj_size;
546
547 struct mcp251xfd_tx_obj obj[MCP251XFD_TX_OBJ_NUM_MAX];
548 union mcp251xfd_write_reg_buf rts_buf;
549};
550
551struct mcp251xfd_rx_ring {
552 unsigned int head;

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877 return priv->tef->head & (priv->tx->obj_num - 1);
878}
879
880static inline u8 mcp251xfd_get_tef_tail(const struct mcp251xfd_priv *priv)
881{
882 return priv->tef->tail & (priv->tx->obj_num - 1);
883}
884
547 u8 obj_size;
548
549 struct mcp251xfd_tx_obj obj[MCP251XFD_TX_OBJ_NUM_MAX];
550 union mcp251xfd_write_reg_buf rts_buf;
551};
552
553struct mcp251xfd_rx_ring {
554 unsigned int head;

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879 return priv->tef->head & (priv->tx->obj_num - 1);
880}
881
882static inline u8 mcp251xfd_get_tef_tail(const struct mcp251xfd_priv *priv)
883{
884 return priv->tef->tail & (priv->tx->obj_num - 1);
885}
886
885static inline u8 mcp251xfd_get_tef_len(const struct mcp251xfd_priv *priv)
887static inline u8 mcp251xfd_get_tef_linear_len(const struct mcp251xfd_priv *priv, u8 len)
886{
888{
887 return priv->tef->head - priv->tef->tail;
888}
889
890static inline u8 mcp251xfd_get_tef_linear_len(const struct mcp251xfd_priv *priv)
891{
892 u8 len;
893
894 len = mcp251xfd_get_tef_len(priv);
895
896 return min_t(u8, len, priv->tx->obj_num - mcp251xfd_get_tef_tail(priv));
897}
898
899static inline u8 mcp251xfd_get_tx_head(const struct mcp251xfd_tx_ring *ring)
900{
901 return ring->head & (ring->obj_num - 1);
902}
903

--- 79 unchanged lines hidden --- 		889 return min_t(u8, len, priv->tx->obj_num - mcp251xfd_get_tef_tail(priv));
890}
891
892static inline u8 mcp251xfd_get_tx_head(const struct mcp251xfd_tx_ring *ring)
893{
894 return ring->head & (ring->obj_num - 1);
895}
896

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