NetBSD/sys/dev/pci/if_bgevar.h

/*	$NetBSD: if_bgevar.h,v 1.9 2012/02/02 19:43:05 tls Exp $	*/
/*
 * Copyright (c) 2001 Wind River Systems
 * Copyright (c) 1997, 1998, 1999, 2001
 *	Bill Paul <wpaul@windriver.com>.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by Bill Paul.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $FreeBSD: if_bgereg.h,v 1.1.2.7 2002/11/02 18:17:55 mp Exp $
 */

/*
 * BCM570x memory map. The internal memory layout varies somewhat
 * depending on whether or not we have external SSRAM attached.
 * The BCM5700 can have up to 16MB of external memory. The BCM5701
 * is apparently not designed to use external SSRAM. The mappings
 * up to the first 4 send rings are the same for both internal and
 * external memory configurations. Note that mini RX ring space is
 * only available with external SSRAM configurations, which means
 * the mini RX ring is not supported on the BCM5701.
 *
 * The NIC's memory can be accessed by the host in one of 3 ways:
 *
 * 1) Indirect register access. The MEMWIN_BASEADDR and MEMWIN_DATA
 *    registers in PCI config space can be used to read any 32-bit
 *    address within the NIC's memory.
 *
 * 2) Memory window access. The MEMWIN_BASEADDR register in PCI config
 *    space can be used in conjunction with the memory window in the
 *    device register space at offset 0x8000 to read any 32K chunk
 *    of NIC memory.
 *
 * 3) Flat mode. If the 'flat mode' bit in the PCI state register is
 *    set, the device I/O mapping consumes 32MB of host address space,
 *    allowing all of the registers and internal NIC memory to be
 *    accessed directly. NIC memory addresses are offset by 0x01000000.
 *    Flat mode consumes so much host address space that it is not
 *    recommended.
 */

#ifndef _DEV_PCI_IF_BGEVAR_H_
#define _DEV_PCI_IF_BGEVAR_H_

#include <sys/bus.h>
#include <net/if_ether.h>
#include <dev/pci/pcivar.h>

#define BGE_HOSTADDR(x, y)						\
	do {								\
		(x).bge_addr_lo = ((uint64_t) (y) & 0xffffffff);	\
		if (sizeof (bus_addr_t) == 8)				\
			(x).bge_addr_hi = ((uint64_t) (y) >> 32);	\
		else							\
			(x).bge_addr_hi = 0;				\
	} while(0)

#define RCB_WRITE_4(sc, rcb, offset, val) \
	bus_space_write_4(sc->bge_btag, sc->bge_bhandle, \
			  rcb + offsetof(struct bge_rcb, offset), val)

/*
 * Other utility macros.
 */
#define BGE_INC(x, y)	(x) = (x + 1) % y

/*
 * Register access macros. The Tigon always uses memory mapped register
 * accesses and all registers must be accessed with 32 bit operations.
 */

#define CSR_WRITE_4(sc, reg, val)	\
	bus_space_write_4(sc->bge_btag, sc->bge_bhandle, reg, val)

#define CSR_READ_4(sc, reg)		\
	bus_space_read_4(sc->bge_btag, sc->bge_bhandle, reg)

#define BGE_SETBIT(sc, reg, x)	\
	CSR_WRITE_4(sc, reg, (CSR_READ_4(sc, reg) | x))
#define BGE_CLRBIT(sc, reg, x)	\
	CSR_WRITE_4(sc, reg, (CSR_READ_4(sc, reg) & ~x))

#define PCI_SETBIT(pc, tag, reg, x)	\
	pci_conf_write(pc, tag, reg, (pci_conf_read(pc, tag, reg) | x))
#define PCI_CLRBIT(pc, tag, reg, x)	\
	pci_conf_write(pc, tag, reg, (pci_conf_read(pc, tag, reg) & ~x))

/*
 * Memory management stuff. Note: the SSLOTS, MSLOTS and JSLOTS
 * values are tuneable. They control the actual amount of buffers
 * allocated for the standard, mini and jumbo receive rings.
 */

#define BGE_SSLOTS	256
#define BGE_MSLOTS	256
#define BGE_JSLOTS	384
#define BGE_RSLOTS	256

#define BGE_JRAWLEN (BGE_JUMBO_FRAMELEN + ETHER_ALIGN)
#define BGE_JLEN (BGE_JRAWLEN + (sizeof(uint64_t) - \
	(BGE_JRAWLEN % sizeof(uint64_t))))
#define BGE_JPAGESZ PAGE_SIZE
#define BGE_RESID (BGE_JPAGESZ - (BGE_JLEN * BGE_JSLOTS) % BGE_JPAGESZ)
#define BGE_JMEM ((BGE_JLEN * BGE_JSLOTS) + BGE_RESID)

/*
 * Ring structures. Most of these reside in host memory and we tell
 * the NIC where they are via the ring control blocks. The exceptions
 * are the tx and command rings, which live in NIC memory and which
 * we access via the shared memory window.
 */
struct bge_ring_data {
	struct bge_rx_bd	bge_rx_std_ring[BGE_STD_RX_RING_CNT];
	struct bge_rx_bd	bge_rx_jumbo_ring[BGE_JUMBO_RX_RING_CNT];
	struct bge_rx_bd	bge_rx_return_ring[BGE_RETURN_RING_CNT];
	struct bge_tx_bd	bge_tx_ring[BGE_TX_RING_CNT];
	struct bge_status_block	bge_status_block;
	struct bge_tx_desc	*bge_tx_ring_nic;/* pointer to shared mem */
	struct bge_cmd_desc	*bge_cmd_ring;	/* pointer to shared mem */
	struct bge_gib		bge_info;
};

#define BGE_RING_DMA_ADDR(sc, offset) \
	((sc)->bge_ring_map->dm_segs[0].ds_addr + \
	offsetof(struct bge_ring_data, offset))

/*
 * Number of DMA segments in a TxCB. Note that this is carefully
 * chosen to make the total struct size an even power of two. It's
 * critical that no TxCB be split across a page boundary since
 * no attempt is made to allocate physically contiguous memory.
 *
 */
#if 0	/* pre-TSO values */
#define BGE_TXDMA_MAX	ETHER_MAX_LEN_JUMBO
#ifdef _LP64
#define BGE_NTXSEG	30
#else
#define BGE_NTXSEG	31
#endif
#else	/* TSO values */
#define BGE_TXDMA_MAX	(round_page(IP_MAXPACKET))	/* for TSO */
#ifdef _LP64
#define BGE_NTXSEG	120	/* XXX just a guess */
#else
#define BGE_NTXSEG	124	/* XXX just a guess */
#endif
#endif	/* TSO values */


/*
 * Mbuf pointers. We need these to keep track of the virtual addresses
 * of our mbuf chains since we can only convert from physical to virtual,
 * not the other way around.
 */
struct bge_chain_data {
	struct mbuf		*bge_tx_chain[BGE_TX_RING_CNT];
	struct mbuf		*bge_rx_std_chain[BGE_STD_RX_RING_CNT];
	struct mbuf		*bge_rx_jumbo_chain[BGE_JUMBO_RX_RING_CNT];
	struct mbuf		*bge_rx_mini_chain[BGE_MINI_RX_RING_CNT];
	bus_dmamap_t		bge_rx_std_map[BGE_STD_RX_RING_CNT];
	bus_dmamap_t		bge_rx_jumbo_map;
	/* Stick the jumbo mem management stuff here too. */
	void *			bge_jslots[BGE_JSLOTS];
	void *			bge_jumbo_buf;
};

#define BGE_JUMBO_DMA_ADDR(sc, m) \
	((sc)->bge_cdata.bge_rx_jumbo_map->dm_segs[0].ds_addr + \
	 (mtod((m), char *) - (char *)(sc)->bge_cdata.bge_jumbo_buf))

struct bge_type {
	uint16_t		bge_vid;
	uint16_t		bge_did;
	char			*bge_name;
};

#define BGE_TIMEOUT		100000
#define BGE_TXCONS_UNSET		0xFFFF	/* impossible value */

struct bge_jpool_entry {
	int				slot;
	SLIST_ENTRY(bge_jpool_entry)	jpool_entries;
};

struct bge_bcom_hack {
	int			reg;
	int			val;
};

struct txdmamap_pool_entry {
	bus_dmamap_t dmamap;
	SLIST_ENTRY(txdmamap_pool_entry) link;
};

#define	ASF_ENABLE		1
#define	ASF_NEW_HANDSHAKE	2
#define	ASF_STACKUP		4

struct bge_softc {
	device_t		bge_dev;
	struct ethercom		ethercom;	/* interface info */
	bus_space_handle_t	bge_bhandle;
	bus_space_tag_t		bge_btag;
	void			*bge_intrhand;
	pci_chipset_tag_t	sc_pc;
	pcitag_t		sc_pcitag;

	struct mii_data		bge_mii;
	struct ifmedia		bge_ifmedia;	/* media info */
	uint32_t		bge_return_ring_cnt;
	uint32_t		bge_tx_prodidx;
	bus_dma_tag_t		bge_dmatag;
	uint32_t		bge_pcixcap;
	uint32_t		bge_pciecap;
	uint32_t		bge_chipid;
	uint32_t		bge_local_ctrl_reg;
	uint8_t			bge_asf_mode;
	uint8_t			bge_asf_count;
	struct bge_ring_data	*bge_rdata;	/* rings */
	struct bge_chain_data	bge_cdata;	/* mbufs */
	bus_dmamap_t		bge_ring_map;
	uint16_t		bge_tx_saved_considx;
	uint16_t		bge_rx_saved_considx;
	uint16_t		bge_ev_saved_considx;
	uint16_t		bge_std;	/* current std ring head */
	uint16_t		bge_jumbo;	/* current jumo ring head */
	SLIST_HEAD(__bge_jfreehead, bge_jpool_entry)	bge_jfree_listhead;
	SLIST_HEAD(__bge_jinusehead, bge_jpool_entry)	bge_jinuse_listhead;
	uint32_t		bge_stat_ticks;
	uint32_t		bge_rx_coal_ticks;
	uint32_t		bge_tx_coal_ticks;
	uint32_t		bge_rx_max_coal_bds;
	uint32_t		bge_tx_max_coal_bds;
	uint32_t		bge_tx_buf_ratio;
	uint32_t		bge_sts;
#define BGE_STS_LINK		0x00000001	/* MAC link status */
#define BGE_STS_LINK_EVT	0x00000002	/* pending link event */
#define BGE_STS_AUTOPOLL	0x00000004	/* PHY auto-polling  */
#define BGE_STS_BIT(sc, x)	((sc)->bge_sts & (x))
#define BGE_STS_SETBIT(sc, x)	((sc)->bge_sts |= (x))
#define BGE_STS_CLRBIT(sc, x)	((sc)->bge_sts &= ~(x))
	int			bge_if_flags;
	uint32_t		bge_flags;
	int			bge_flowflags;
#ifdef BGE_EVENT_COUNTERS
	/*
	 * Event counters.
	 */
	struct evcnt bge_ev_intr;	/* interrupts */
	struct evcnt bge_ev_tx_xoff;	/* send PAUSE(len>0) packets */
	struct evcnt bge_ev_tx_xon;	/* send PAUSE(len=0) packets */
	struct evcnt bge_ev_rx_xoff;	/* receive PAUSE(len>0) packets */
	struct evcnt bge_ev_rx_xon;	/* receive PAUSE(len=0) packets */
	struct evcnt bge_ev_rx_macctl;	/* receive MAC control packets */
	struct evcnt bge_ev_xoffentered;/* XOFF state entered */
#endif /* BGE_EVENT_COUNTERS */
	int			bge_txcnt;
	struct callout		bge_timeout;
	char			*bge_vpd_prodname;
	char			*bge_vpd_readonly;
	int			bge_pending_rxintr_change;
	SLIST_HEAD(, txdmamap_pool_entry) txdma_list;
	struct txdmamap_pool_entry *txdma[BGE_TX_RING_CNT];

	struct sysctllog	*bge_log;

	krndsource_t	rnd_source;	/* random source */
};

#endif /* _DEV_PCI_IF_BGEVAR_H_ */