[people/arne_f/kernel.git] / drivers / net / wireless / broadcom / b43 / dma.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef B43_DMA_H_
#define B43_DMA_H_

#include <linux/err.h>

#include "b43.h"


/* DMA-Interrupt reasons. */
#define B43_DMAIRQ_FATALMASK	((1 << 10) | (1 << 11) | (1 << 12) \
					 | (1 << 14) | (1 << 15))
#define B43_DMAIRQ_RDESC_UFLOW		(1 << 13)
#define B43_DMAIRQ_RX_DONE		(1 << 16)

/*** 32-bit DMA Engine. ***/

/* 32-bit DMA controller registers. */
#define B43_DMA32_TXCTL				0x00
#define		B43_DMA32_TXENABLE			0x00000001
#define		B43_DMA32_TXSUSPEND			0x00000002
#define		B43_DMA32_TXLOOPBACK		0x00000004
#define		B43_DMA32_TXFLUSH			0x00000010
#define		B43_DMA32_TXPARITYDISABLE		0x00000800
#define		B43_DMA32_TXADDREXT_MASK		0x00030000
#define		B43_DMA32_TXADDREXT_SHIFT		16
#define B43_DMA32_TXRING				0x04
#define B43_DMA32_TXINDEX				0x08
#define B43_DMA32_TXSTATUS				0x0C
#define		B43_DMA32_TXDPTR			0x00000FFF
#define		B43_DMA32_TXSTATE			0x0000F000
#define			B43_DMA32_TXSTAT_DISABLED	0x00000000
#define			B43_DMA32_TXSTAT_ACTIVE	0x00001000
#define			B43_DMA32_TXSTAT_IDLEWAIT	0x00002000
#define			B43_DMA32_TXSTAT_STOPPED	0x00003000
#define			B43_DMA32_TXSTAT_SUSP	0x00004000
#define		B43_DMA32_TXERROR			0x000F0000
#define			B43_DMA32_TXERR_NOERR	0x00000000
#define			B43_DMA32_TXERR_PROT	0x00010000
#define			B43_DMA32_TXERR_UNDERRUN	0x00020000
#define			B43_DMA32_TXERR_BUFREAD	0x00030000
#define			B43_DMA32_TXERR_DESCREAD	0x00040000
#define		B43_DMA32_TXACTIVE			0xFFF00000
#define B43_DMA32_RXCTL				0x10
#define		B43_DMA32_RXENABLE			0x00000001
#define		B43_DMA32_RXFROFF_MASK		0x000000FE
#define		B43_DMA32_RXFROFF_SHIFT		1
#define		B43_DMA32_RXDIRECTFIFO		0x00000100
#define		B43_DMA32_RXPARITYDISABLE		0x00000800
#define		B43_DMA32_RXADDREXT_MASK		0x00030000
#define		B43_DMA32_RXADDREXT_SHIFT		16
#define B43_DMA32_RXRING				0x14
#define B43_DMA32_RXINDEX				0x18
#define B43_DMA32_RXSTATUS				0x1C
#define		B43_DMA32_RXDPTR			0x00000FFF
#define		B43_DMA32_RXSTATE			0x0000F000
#define			B43_DMA32_RXSTAT_DISABLED	0x00000000
#define			B43_DMA32_RXSTAT_ACTIVE	0x00001000
#define			B43_DMA32_RXSTAT_IDLEWAIT	0x00002000
#define			B43_DMA32_RXSTAT_STOPPED	0x00003000
#define		B43_DMA32_RXERROR			0x000F0000
#define			B43_DMA32_RXERR_NOERR	0x00000000
#define			B43_DMA32_RXERR_PROT	0x00010000
#define			B43_DMA32_RXERR_OVERFLOW	0x00020000
#define			B43_DMA32_RXERR_BUFWRITE	0x00030000
#define			B43_DMA32_RXERR_DESCREAD	0x00040000
#define		B43_DMA32_RXACTIVE			0xFFF00000

/* 32-bit DMA descriptor. */
struct b43_dmadesc32 {
	__le32 control;
	__le32 address;
} __packed;
#define B43_DMA32_DCTL_BYTECNT		0x00001FFF
#define B43_DMA32_DCTL_ADDREXT_MASK		0x00030000
#define B43_DMA32_DCTL_ADDREXT_SHIFT	16
#define B43_DMA32_DCTL_DTABLEEND		0x10000000
#define B43_DMA32_DCTL_IRQ			0x20000000
#define B43_DMA32_DCTL_FRAMEEND		0x40000000
#define B43_DMA32_DCTL_FRAMESTART		0x80000000

/*** 64-bit DMA Engine. ***/

/* 64-bit DMA controller registers. */
#define B43_DMA64_TXCTL				0x00
#define		B43_DMA64_TXENABLE			0x00000001
#define		B43_DMA64_TXSUSPEND			0x00000002
#define		B43_DMA64_TXLOOPBACK		0x00000004
#define		B43_DMA64_TXFLUSH			0x00000010
#define		B43_DMA64_TXPARITYDISABLE		0x00000800
#define		B43_DMA64_TXADDREXT_MASK		0x00030000
#define		B43_DMA64_TXADDREXT_SHIFT		16
#define B43_DMA64_TXINDEX				0x04
#define B43_DMA64_TXRINGLO				0x08
#define B43_DMA64_TXRINGHI				0x0C
#define B43_DMA64_TXSTATUS				0x10
#define		B43_DMA64_TXSTATDPTR		0x00001FFF
#define		B43_DMA64_TXSTAT			0xF0000000
#define			B43_DMA64_TXSTAT_DISABLED	0x00000000
#define			B43_DMA64_TXSTAT_ACTIVE	0x10000000
#define			B43_DMA64_TXSTAT_IDLEWAIT	0x20000000
#define			B43_DMA64_TXSTAT_STOPPED	0x30000000
#define			B43_DMA64_TXSTAT_SUSP	0x40000000
#define B43_DMA64_TXERROR				0x14
#define		B43_DMA64_TXERRDPTR			0x0001FFFF
#define		B43_DMA64_TXERR			0xF0000000
#define			B43_DMA64_TXERR_NOERR	0x00000000
#define			B43_DMA64_TXERR_PROT	0x10000000
#define			B43_DMA64_TXERR_UNDERRUN	0x20000000
#define			B43_DMA64_TXERR_TRANSFER	0x30000000
#define			B43_DMA64_TXERR_DESCREAD	0x40000000
#define			B43_DMA64_TXERR_CORE	0x50000000
#define B43_DMA64_RXCTL				0x20
#define		B43_DMA64_RXENABLE			0x00000001
#define		B43_DMA64_RXFROFF_MASK		0x000000FE
#define		B43_DMA64_RXFROFF_SHIFT		1
#define		B43_DMA64_RXDIRECTFIFO		0x00000100
#define		B43_DMA64_RXPARITYDISABLE		0x00000800
#define		B43_DMA64_RXADDREXT_MASK		0x00030000
#define		B43_DMA64_RXADDREXT_SHIFT		16
#define B43_DMA64_RXINDEX				0x24
#define B43_DMA64_RXRINGLO				0x28
#define B43_DMA64_RXRINGHI				0x2C
#define B43_DMA64_RXSTATUS				0x30
#define		B43_DMA64_RXSTATDPTR		0x00001FFF
#define		B43_DMA64_RXSTAT			0xF0000000
#define			B43_DMA64_RXSTAT_DISABLED	0x00000000
#define			B43_DMA64_RXSTAT_ACTIVE	0x10000000
#define			B43_DMA64_RXSTAT_IDLEWAIT	0x20000000
#define			B43_DMA64_RXSTAT_STOPPED	0x30000000
#define			B43_DMA64_RXSTAT_SUSP	0x40000000
#define B43_DMA64_RXERROR				0x34
#define		B43_DMA64_RXERRDPTR			0x0001FFFF
#define		B43_DMA64_RXERR			0xF0000000
#define			B43_DMA64_RXERR_NOERR	0x00000000
#define			B43_DMA64_RXERR_PROT	0x10000000
#define			B43_DMA64_RXERR_UNDERRUN	0x20000000
#define			B43_DMA64_RXERR_TRANSFER	0x30000000
#define			B43_DMA64_RXERR_DESCREAD	0x40000000
#define			B43_DMA64_RXERR_CORE	0x50000000

/* 64-bit DMA descriptor. */
struct b43_dmadesc64 {
	__le32 control0;
	__le32 control1;
	__le32 address_low;
	__le32 address_high;
} __packed;
#define B43_DMA64_DCTL0_DTABLEEND		0x10000000
#define B43_DMA64_DCTL0_IRQ			0x20000000
#define B43_DMA64_DCTL0_FRAMEEND		0x40000000
#define B43_DMA64_DCTL0_FRAMESTART		0x80000000
#define B43_DMA64_DCTL1_BYTECNT		0x00001FFF
#define B43_DMA64_DCTL1_ADDREXT_MASK	0x00030000
#define B43_DMA64_DCTL1_ADDREXT_SHIFT	16

struct b43_dmadesc_generic {
	union {
		struct b43_dmadesc32 dma32;
		struct b43_dmadesc64 dma64;
	} __packed;
} __packed;

/* Misc DMA constants */
#define B43_DMA32_RINGMEMSIZE		4096
#define B43_DMA64_RINGMEMSIZE		8192
/* Offset of frame with actual data */
#define B43_DMA0_RX_FW598_FO		38
#define B43_DMA0_RX_FW351_FO		30

/* DMA engine tuning knobs */
#define B43_TXRING_SLOTS		256
#define B43_RXRING_SLOTS		256
#define B43_DMA0_RX_FW598_BUFSIZE	(B43_DMA0_RX_FW598_FO + IEEE80211_MAX_FRAME_LEN)
#define B43_DMA0_RX_FW351_BUFSIZE	(B43_DMA0_RX_FW351_FO + IEEE80211_MAX_FRAME_LEN)

/* Pointer poison */
#define B43_DMA_PTR_POISON		((void *)ERR_PTR(-ENOMEM))
#define b43_dma_ptr_is_poisoned(ptr)	(unlikely((ptr) == B43_DMA_PTR_POISON))


struct sk_buff;
struct b43_private;
struct b43_txstatus;

struct b43_dmadesc_meta {
	/* The kernel DMA-able buffer. */
	struct sk_buff *skb;
	/* DMA base bus-address of the descriptor buffer. */
	dma_addr_t dmaaddr;
	/* ieee80211 TX status. Only used once per 802.11 frag. */
	bool is_last_fragment;
};

struct b43_dmaring;

/* Lowlevel DMA operations that differ between 32bit and 64bit DMA. */
struct b43_dma_ops {
	struct b43_dmadesc_generic *(*idx2desc) (struct b43_dmaring * ring,
						 int slot,
						 struct b43_dmadesc_meta **
						 meta);
	void (*fill_descriptor) (struct b43_dmaring * ring,
				 struct b43_dmadesc_generic * desc,
				 dma_addr_t dmaaddr, u16 bufsize, int start,
				 int end, int irq);
	void (*poke_tx) (struct b43_dmaring * ring, int slot);
	void (*tx_suspend) (struct b43_dmaring * ring);
	void (*tx_resume) (struct b43_dmaring * ring);
	int (*get_current_rxslot) (struct b43_dmaring * ring);
	void (*set_current_rxslot) (struct b43_dmaring * ring, int slot);
};

enum b43_dmatype {
	B43_DMA_30BIT	= 30,
	B43_DMA_32BIT	= 32,
	B43_DMA_64BIT	= 64,
};

enum b43_addrtype {
	B43_DMA_ADDR_LOW,
	B43_DMA_ADDR_HIGH,
	B43_DMA_ADDR_EXT,
};

struct b43_dmaring {
	/* Lowlevel DMA ops. */
	const struct b43_dma_ops *ops;
	/* Kernel virtual base address of the ring memory. */
	void *descbase;
	/* Meta data about all descriptors. */
	struct b43_dmadesc_meta *meta;
	/* Cache of TX headers for each TX frame.
	 * This is to avoid an allocation on each TX.
	 * This is NULL for an RX ring.
	 */
	u8 *txhdr_cache;
	/* (Unadjusted) DMA base bus-address of the ring memory. */
	dma_addr_t dmabase;
	/* Number of descriptor slots in the ring. */
	int nr_slots;
	/* Number of used descriptor slots. */
	int used_slots;
	/* Currently used slot in the ring. */
	int current_slot;
	/* Frameoffset in octets. */
	u32 frameoffset;
	/* Descriptor buffer size. */
	u16 rx_buffersize;
	/* The MMIO base register of the DMA controller. */
	u16 mmio_base;
	/* DMA controller index number (0-5). */
	int index;
	/* Boolean. Is this a TX ring? */
	bool tx;
	/* The type of DMA engine used. */
	enum b43_dmatype type;
	/* Boolean. Is this ring stopped at ieee80211 level? */
	bool stopped;
	/* The QOS priority assigned to this ring. Only used for TX rings.
	 * This is the mac80211 "queue" value. */
	u8 queue_prio;
	struct b43_wldev *dev;
#ifdef CONFIG_B43_DEBUG
	/* Maximum number of used slots. */
	int max_used_slots;
	/* Last time we injected a ring overflow. */
	unsigned long last_injected_overflow;
	/* Statistics: Number of successfully transmitted packets */
	u64 nr_succeed_tx_packets;
	/* Statistics: Number of failed TX packets */
	u64 nr_failed_tx_packets;
	/* Statistics: Total number of TX plus all retries. */
	u64 nr_total_packet_tries;
#endif /* CONFIG_B43_DEBUG */
};

static inline u32 b43_dma_read(struct b43_dmaring *ring, u16 offset)
{
	return b43_read32(ring->dev, ring->mmio_base + offset);
}

static inline void b43_dma_write(struct b43_dmaring *ring, u16 offset, u32 value)
{
	b43_write32(ring->dev, ring->mmio_base + offset, value);
}

int b43_dma_init(struct b43_wldev *dev);
void b43_dma_free(struct b43_wldev *dev);

void b43_dma_tx_suspend(struct b43_wldev *dev);
void b43_dma_tx_resume(struct b43_wldev *dev);

int b43_dma_tx(struct b43_wldev *dev,
	       struct sk_buff *skb);
void b43_dma_handle_txstatus(struct b43_wldev *dev,
			     const struct b43_txstatus *status);

void b43_dma_handle_rx_overflow(struct b43_dmaring *ring);

void b43_dma_rx(struct b43_dmaring *ring);

void b43_dma_direct_fifo_rx(struct b43_wldev *dev,
			    unsigned int engine_index, bool enable);

#endif /* B43_DMA_H_ */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
e4d6b795 MB	2	#ifndef B43_DMA_H_
	3	#define B43_DMA_H_
	4
07681e21	5	#include <linux/err.h>
e4d6b795 MB	6
	7	#include "b43.h"
	8
8eccb53f	9
e4d6b795 MB	10	/* DMA-Interrupt reasons. */
	11	#define B43_DMAIRQ_FATALMASK ((1 << 10) \| (1 << 11) \| (1 << 12) \
	12	\| (1 << 14) \| (1 << 15))
73b82bf0	13	#define B43_DMAIRQ_RDESC_UFLOW (1 << 13)
e4d6b795 MB	14	#define B43_DMAIRQ_RX_DONE (1 << 16)
	15
	16	/* 32-bit DMA Engine. */
	17
	18	/* 32-bit DMA controller registers. */
	19	#define B43_DMA32_TXCTL 0x00
	20	#define B43_DMA32_TXENABLE 0x00000001
	21	#define B43_DMA32_TXSUSPEND 0x00000002
	22	#define B43_DMA32_TXLOOPBACK 0x00000004
	23	#define B43_DMA32_TXFLUSH 0x00000010
78c1ee7e	24	#define B43_DMA32_TXPARITYDISABLE 0x00000800
e4d6b795 MB	25	#define B43_DMA32_TXADDREXT_MASK 0x00030000
	26	#define B43_DMA32_TXADDREXT_SHIFT 16
	27	#define B43_DMA32_TXRING 0x04
	28	#define B43_DMA32_TXINDEX 0x08
	29	#define B43_DMA32_TXSTATUS 0x0C
	30	#define B43_DMA32_TXDPTR 0x00000FFF
	31	#define B43_DMA32_TXSTATE 0x0000F000
	32	#define B43_DMA32_TXSTAT_DISABLED 0x00000000
	33	#define B43_DMA32_TXSTAT_ACTIVE 0x00001000
	34	#define B43_DMA32_TXSTAT_IDLEWAIT 0x00002000
	35	#define B43_DMA32_TXSTAT_STOPPED 0x00003000
	36	#define B43_DMA32_TXSTAT_SUSP 0x00004000
	37	#define B43_DMA32_TXERROR 0x000F0000
	38	#define B43_DMA32_TXERR_NOERR 0x00000000
	39	#define B43_DMA32_TXERR_PROT 0x00010000
	40	#define B43_DMA32_TXERR_UNDERRUN 0x00020000
	41	#define B43_DMA32_TXERR_BUFREAD 0x00030000
	42	#define B43_DMA32_TXERR_DESCREAD 0x00040000
	43	#define B43_DMA32_TXACTIVE 0xFFF00000
	44	#define B43_DMA32_RXCTL 0x10
	45	#define B43_DMA32_RXENABLE 0x00000001
	46	#define B43_DMA32_RXFROFF_MASK 0x000000FE
	47	#define B43_DMA32_RXFROFF_SHIFT 1
	48	#define B43_DMA32_RXDIRECTFIFO 0x00000100
78c1ee7e	49	#define B43_DMA32_RXPARITYDISABLE 0x00000800
e4d6b795 MB	50	#define B43_DMA32_RXADDREXT_MASK 0x00030000
	51	#define B43_DMA32_RXADDREXT_SHIFT 16
	52	#define B43_DMA32_RXRING 0x14
	53	#define B43_DMA32_RXINDEX 0x18
	54	#define B43_DMA32_RXSTATUS 0x1C
	55	#define B43_DMA32_RXDPTR 0x00000FFF
	56	#define B43_DMA32_RXSTATE 0x0000F000
	57	#define B43_DMA32_RXSTAT_DISABLED 0x00000000
	58	#define B43_DMA32_RXSTAT_ACTIVE 0x00001000
	59	#define B43_DMA32_RXSTAT_IDLEWAIT 0x00002000
	60	#define B43_DMA32_RXSTAT_STOPPED 0x00003000
	61	#define B43_DMA32_RXERROR 0x000F0000
	62	#define B43_DMA32_RXERR_NOERR 0x00000000
	63	#define B43_DMA32_RXERR_PROT 0x00010000
	64	#define B43_DMA32_RXERR_OVERFLOW 0x00020000
	65	#define B43_DMA32_RXERR_BUFWRITE 0x00030000
	66	#define B43_DMA32_RXERR_DESCREAD 0x00040000
	67	#define B43_DMA32_RXACTIVE 0xFFF00000
	68
	69	/* 32-bit DMA descriptor. */
	70	struct b43_dmadesc32 {
	71	__le32 control;
	72	__le32 address;
ba2d3587	73	} __packed;
e4d6b795 MB	74	#define B43_DMA32_DCTL_BYTECNT 0x00001FFF
	75	#define B43_DMA32_DCTL_ADDREXT_MASK 0x00030000
	76	#define B43_DMA32_DCTL_ADDREXT_SHIFT 16
	77	#define B43_DMA32_DCTL_DTABLEEND 0x10000000
	78	#define B43_DMA32_DCTL_IRQ 0x20000000
	79	#define B43_DMA32_DCTL_FRAMEEND 0x40000000
	80	#define B43_DMA32_DCTL_FRAMESTART 0x80000000
	81
	82	/* 64-bit DMA Engine. */
	83
	84	/* 64-bit DMA controller registers. */
	85	#define B43_DMA64_TXCTL 0x00
	86	#define B43_DMA64_TXENABLE 0x00000001
	87	#define B43_DMA64_TXSUSPEND 0x00000002
	88	#define B43_DMA64_TXLOOPBACK 0x00000004
	89	#define B43_DMA64_TXFLUSH 0x00000010
78c1ee7e	90	#define B43_DMA64_TXPARITYDISABLE 0x00000800
e4d6b795 MB	91	#define B43_DMA64_TXADDREXT_MASK 0x00030000
	92	#define B43_DMA64_TXADDREXT_SHIFT 16
	93	#define B43_DMA64_TXINDEX 0x04
	94	#define B43_DMA64_TXRINGLO 0x08
	95	#define B43_DMA64_TXRINGHI 0x0C
	96	#define B43_DMA64_TXSTATUS 0x10
	97	#define B43_DMA64_TXSTATDPTR 0x00001FFF
	98	#define B43_DMA64_TXSTAT 0xF0000000
	99	#define B43_DMA64_TXSTAT_DISABLED 0x00000000
	100	#define B43_DMA64_TXSTAT_ACTIVE 0x10000000
	101	#define B43_DMA64_TXSTAT_IDLEWAIT 0x20000000
	102	#define B43_DMA64_TXSTAT_STOPPED 0x30000000
	103	#define B43_DMA64_TXSTAT_SUSP 0x40000000
	104	#define B43_DMA64_TXERROR 0x14
	105	#define B43_DMA64_TXERRDPTR 0x0001FFFF
	106	#define B43_DMA64_TXERR 0xF0000000
	107	#define B43_DMA64_TXERR_NOERR 0x00000000
	108	#define B43_DMA64_TXERR_PROT 0x10000000
	109	#define B43_DMA64_TXERR_UNDERRUN 0x20000000
	110	#define B43_DMA64_TXERR_TRANSFER 0x30000000
	111	#define B43_DMA64_TXERR_DESCREAD 0x40000000
	112	#define B43_DMA64_TXERR_CORE 0x50000000
	113	#define B43_DMA64_RXCTL 0x20
	114	#define B43_DMA64_RXENABLE 0x00000001
	115	#define B43_DMA64_RXFROFF_MASK 0x000000FE
	116	#define B43_DMA64_RXFROFF_SHIFT 1
	117	#define B43_DMA64_RXDIRECTFIFO 0x00000100
78c1ee7e	118	#define B43_DMA64_RXPARITYDISABLE 0x00000800
e4d6b795 MB	119	#define B43_DMA64_RXADDREXT_MASK 0x00030000
	120	#define B43_DMA64_RXADDREXT_SHIFT 16
	121	#define B43_DMA64_RXINDEX 0x24
	122	#define B43_DMA64_RXRINGLO 0x28
	123	#define B43_DMA64_RXRINGHI 0x2C
	124	#define B43_DMA64_RXSTATUS 0x30
	125	#define B43_DMA64_RXSTATDPTR 0x00001FFF
	126	#define B43_DMA64_RXSTAT 0xF0000000
	127	#define B43_DMA64_RXSTAT_DISABLED 0x00000000
	128	#define B43_DMA64_RXSTAT_ACTIVE 0x10000000
	129	#define B43_DMA64_RXSTAT_IDLEWAIT 0x20000000
	130	#define B43_DMA64_RXSTAT_STOPPED 0x30000000
	131	#define B43_DMA64_RXSTAT_SUSP 0x40000000
	132	#define B43_DMA64_RXERROR 0x34
	133	#define B43_DMA64_RXERRDPTR 0x0001FFFF
	134	#define B43_DMA64_RXERR 0xF0000000
	135	#define B43_DMA64_RXERR_NOERR 0x00000000
	136	#define B43_DMA64_RXERR_PROT 0x10000000
	137	#define B43_DMA64_RXERR_UNDERRUN 0x20000000
	138	#define B43_DMA64_RXERR_TRANSFER 0x30000000
	139	#define B43_DMA64_RXERR_DESCREAD 0x40000000
	140	#define B43_DMA64_RXERR_CORE 0x50000000
	141
	142	/* 64-bit DMA descriptor. */
	143	struct b43_dmadesc64 {
	144	__le32 control0;
	145	__le32 control1;
	146	__le32 address_low;
	147	__le32 address_high;
ba2d3587	148	} __packed;
e4d6b795 MB	149	#define B43_DMA64_DCTL0_DTABLEEND 0x10000000
	150	#define B43_DMA64_DCTL0_IRQ 0x20000000
	151	#define B43_DMA64_DCTL0_FRAMEEND 0x40000000
	152	#define B43_DMA64_DCTL0_FRAMESTART 0x80000000
	153	#define B43_DMA64_DCTL1_BYTECNT 0x00001FFF
	154	#define B43_DMA64_DCTL1_ADDREXT_MASK 0x00030000
	155	#define B43_DMA64_DCTL1_ADDREXT_SHIFT 16
	156
	157	struct b43_dmadesc_generic {
	158	union {
	159	struct b43_dmadesc32 dma32;
	160	struct b43_dmadesc64 dma64;
ba2d3587 ED	161	} __packed;
ba2d3587 ED	162	} __packed;
e4d6b795 MB	163
e4d6b795 MB	164	/* Misc DMA constants */
14a8083e RM	165	#define B43_DMA32_RINGMEMSIZE 4096
14a8083e RM	166	#define B43_DMA64_RINGMEMSIZE 8192
17030f48 RM	167	/* Offset of frame with actual data */
	168	#define B43_DMA0_RX_FW598_FO 38
	169	#define B43_DMA0_RX_FW351_FO 30
e4d6b795 MB	170
e4d6b795 MB	171	/* DMA engine tuning knobs */
bdceeb2d	172	#define B43_TXRING_SLOTS 256
ccae0e50	173	#define B43_RXRING_SLOTS 256
17030f48 RM	174	#define B43_DMA0_RX_FW598_BUFSIZE (B43_DMA0_RX_FW598_FO + IEEE80211_MAX_FRAME_LEN)
17030f48 RM	175	#define B43_DMA0_RX_FW351_BUFSIZE (B43_DMA0_RX_FW351_FO + IEEE80211_MAX_FRAME_LEN)
8eccb53f	176
07681e21 MB	177	/* Pointer poison */
	178	#define B43_DMA_PTR_POISON ((void *)ERR_PTR(-ENOMEM))
	179	#define b43_dma_ptr_is_poisoned(ptr) (unlikely((ptr) == B43_DMA_PTR_POISON))
	180
e4d6b795	181
e4d6b795 MB	182	struct sk_buff;
	183	struct b43_private;
	184	struct b43_txstatus;
	185
	186	struct b43_dmadesc_meta {
	187	/* The kernel DMA-able buffer. */
	188	struct sk_buff *skb;
	189	/* DMA base bus-address of the descriptor buffer. */
	190	dma_addr_t dmaaddr;
	191	/* ieee80211 TX status. Only used once per 802.11 frag. */
	192	bool is_last_fragment;
e4d6b795 MB	193	};
	194
	195	struct b43_dmaring;
	196
	197	/* Lowlevel DMA operations that differ between 32bit and 64bit DMA. */
	198	struct b43_dma_ops {
	199	struct b43_dmadesc_generic (idx2desc) (struct b43_dmaring * ring,
	200	int slot,
	201	struct b43_dmadesc_meta **
	202	meta);
	203	void (fill_descriptor) (struct b43_dmaring ring,
	204	struct b43_dmadesc_generic * desc,
	205	dma_addr_t dmaaddr, u16 bufsize, int start,
	206	int end, int irq);
	207	void (poke_tx) (struct b43_dmaring ring, int slot);
	208	void (tx_suspend) (struct b43_dmaring ring);
	209	void (tx_resume) (struct b43_dmaring ring);
	210	int (get_current_rxslot) (struct b43_dmaring ring);
	211	void (set_current_rxslot) (struct b43_dmaring ring, int slot);
	212	};
	213
b79caa68 MB	214	enum b43_dmatype {
	215	B43_DMA_30BIT = 30,
	216	B43_DMA_32BIT = 32,
	217	B43_DMA_64BIT = 64,
	218	};
	219
0cc9772a RM	220	enum b43_addrtype {
	221	B43_DMA_ADDR_LOW,
	222	B43_DMA_ADDR_HIGH,
	223	B43_DMA_ADDR_EXT,
	224	};
	225
e4d6b795 MB	226	struct b43_dmaring {
	227	/* Lowlevel DMA ops. */
	228	const struct b43_dma_ops *ops;
	229	/* Kernel virtual base address of the ring memory. */
	230	void *descbase;
	231	/* Meta data about all descriptors. */
	232	struct b43_dmadesc_meta *meta;
bdceeb2d	233	/* Cache of TX headers for each TX frame.
e4d6b795 MB	234	* This is to avoid an allocation on each TX.
	235	* This is NULL for an RX ring.
	236	*/
	237	u8 *txhdr_cache;
	238	/* (Unadjusted) DMA base bus-address of the ring memory. */
	239	dma_addr_t dmabase;
	240	/* Number of descriptor slots in the ring. */
	241	int nr_slots;
	242	/* Number of used descriptor slots. */
	243	int used_slots;
	244	/* Currently used slot in the ring. */
	245	int current_slot;
e4d6b795 MB	246	/* Frameoffset in octets. */
	247	u32 frameoffset;
	248	/* Descriptor buffer size. */
	249	u16 rx_buffersize;
	250	/* The MMIO base register of the DMA controller. */
	251	u16 mmio_base;
	252	/* DMA controller index number (0-5). */
	253	int index;
	254	/* Boolean. Is this a TX ring? */
	255	bool tx;
b79caa68 MB	256	/* The type of DMA engine used. */
b79caa68 MB	257	enum b43_dmatype type;
e4d6b795 MB	258	/* Boolean. Is this ring stopped at ieee80211 level? */
e4d6b795 MB	259	bool stopped;
e6f5b934 MB	260	/* The QOS priority assigned to this ring. Only used for TX rings.
	261	* This is the mac80211 "queue" value. */
	262	u8 queue_prio;
e4d6b795 MB	263	struct b43_wldev *dev;
	264	#ifdef CONFIG_B43_DEBUG
	265	/* Maximum number of used slots. */
	266	int max_used_slots;
	267	/* Last time we injected a ring overflow. */
	268	unsigned long last_injected_overflow;
57df40d2 MB	269	/* Statistics: Number of successfully transmitted packets */
	270	u64 nr_succeed_tx_packets;
	271	/* Statistics: Number of failed TX packets */
	272	u64 nr_failed_tx_packets;
	273	/* Statistics: Total number of TX plus all retries. */
	274	u64 nr_total_packet_tries;
	275	#endif /* CONFIG_B43_DEBUG */
e4d6b795 MB	276	};
	277
	278	static inline u32 b43_dma_read(struct b43_dmaring *ring, u16 offset)
	279	{
	280	return b43_read32(ring->dev, ring->mmio_base + offset);
	281	}
	282
b79caa68	283	static inline void b43_dma_write(struct b43_dmaring *ring, u16 offset, u32 value)
e4d6b795 MB	284	{
	285	b43_write32(ring->dev, ring->mmio_base + offset, value);
	286	}
	287
	288	int b43_dma_init(struct b43_wldev *dev);
	289	void b43_dma_free(struct b43_wldev *dev);
	290
e4d6b795 MB	291	void b43_dma_tx_suspend(struct b43_wldev *dev);
	292	void b43_dma_tx_resume(struct b43_wldev *dev);
	293
e4d6b795	294	int b43_dma_tx(struct b43_wldev *dev,
e039fa4a	295	struct sk_buff *skb);
e4d6b795 MB	296	void b43_dma_handle_txstatus(struct b43_wldev *dev,
	297	const struct b43_txstatus *status);
	298
73b82bf0 TJ	299	void b43_dma_handle_rx_overflow(struct b43_dmaring *ring);
73b82bf0 TJ	300
e4d6b795 MB	301	void b43_dma_rx(struct b43_dmaring *ring);
e4d6b795 MB	302
5100d5ac MB	303	void b43_dma_direct_fifo_rx(struct b43_wldev *dev,
	304	unsigned int engine_index, bool enable);
	305
e4d6b795	306	#endif /* B43_DMA_H_ */