Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 2219 insertions, 0 deletions

diff --git a/drivers/net/skfp/hwmtm.c b/drivers/net/skfp/hwmtm.c
new file mode 100644
index 000000000000..18d429021edb
--- /dev/null
+++ b/drivers/net/skfp/hwmtm.c
@@ -0,0 +1,2219 @@
+/******************************************************************************
+ *
+ *	(C)Copyright 1998,1999 SysKonnect,
+ *	a business unit of Schneider & Koch & Co. Datensysteme GmbH.
+ *
+ *	See the file "skfddi.c" for further information.
+ *
+ *	This program is free software; you can redistribute it and/or modify
+ *	it under the terms of the GNU General Public License as published by
+ *	the Free Software Foundation; either version 2 of the License, or
+ *	(at your option) any later version.
+ *
+ *	The information in this file is provided "AS IS" without warranty.
+ *
+ ******************************************************************************/
+
+#ifndef	lint
+static char const ID_sccs[] = "@(#)hwmtm.c	1.40 99/05/31 (C) SK" ;
+#endif
+
+#define	HWMTM
+
+#ifndef FDDI
+#define	FDDI
+#endif
+
+#include "h/types.h"
+#include "h/fddi.h"
+#include "h/smc.h"
+#include "h/supern_2.h"
+#include "h/skfbiinc.h"
+
+/*
+	-------------------------------------------------------------
+	DOCUMENTATION
+	-------------------------------------------------------------
+	BEGIN_MANUAL_ENTRY(DOCUMENTATION)
+
+			T B D
+
+	END_MANUAL_ENTRY
+*/
+/*
+	-------------------------------------------------------------
+	LOCAL VARIABLES:
+	-------------------------------------------------------------
+*/
+#ifdef COMMON_MB_POOL
+static	SMbuf *mb_start = 0 ;
+static	SMbuf *mb_free = 0 ;
+static	int mb_init = FALSE ;
+static	int call_count = 0 ;
+#endif
+
+/*
+	-------------------------------------------------------------
+	EXTERNE VARIABLES:
+	-------------------------------------------------------------
+*/
+
+#ifdef	DEBUG
+#ifndef	DEBUG_BRD
+extern	struct smt_debug	debug ;
+#endif
+#endif
+
+#ifdef	NDIS_OS2
+extern	u_char	offDepth ;
+extern	u_char	force_irq_pending ;
+#endif
+
+/*
+	-------------------------------------------------------------
+	LOCAL FUNCTIONS:
+	-------------------------------------------------------------
+*/
+
+static void queue_llc_rx(struct s_smc *smc, SMbuf *mb);
+static void smt_to_llc(struct s_smc *smc, SMbuf *mb);
+static void init_txd_ring(struct s_smc *smc);
+static void init_rxd_ring(struct s_smc *smc);
+static void queue_txd_mb(struct s_smc *smc, SMbuf *mb);
+static u_long init_descr_ring(struct s_smc *smc, union s_fp_descr volatile *start,
+			      int count);
+static u_long repair_txd_ring(struct s_smc *smc, struct s_smt_tx_queue *queue);
+static u_long repair_rxd_ring(struct s_smc *smc, struct s_smt_rx_queue *queue);
+static SMbuf* get_llc_rx(struct s_smc *smc);
+static SMbuf* get_txd_mb(struct s_smc *smc);
+
+/*
+	-------------------------------------------------------------
+	EXTERNAL FUNCTIONS:
+	-------------------------------------------------------------
+*/
+/*	The external SMT functions are listed in cmtdef.h */
+
+extern void* mac_drv_get_space(struct s_smc *smc, unsigned int size);
+extern void* mac_drv_get_desc_mem(struct s_smc *smc, unsigned int size);
+extern void init_board(struct s_smc *smc, u_char *mac_addr);
+extern void mac_drv_fill_rxd(struct s_smc *smc);
+extern void plc1_irq(struct s_smc *smc);
+extern void mac_drv_tx_complete(struct s_smc *smc,
+				volatile struct s_smt_fp_txd *txd);
+extern void plc2_irq(struct s_smc *smc);
+extern void mac1_irq(struct s_smc *smc, u_short stu, u_short stl);
+extern void mac2_irq(struct s_smc *smc, u_short code_s2u, u_short code_s2l);
+extern void mac3_irq(struct s_smc *smc, u_short code_s3u, u_short code_s3l);
+extern void timer_irq(struct s_smc *smc);
+extern void mac_drv_rx_complete(struct s_smc *smc,
+				volatile struct s_smt_fp_rxd *rxd,
+				int frag_count, int len);
+extern void mac_drv_requeue_rxd(struct s_smc *smc, 
+				volatile struct s_smt_fp_rxd *rxd,
+				int frag_count);
+extern void init_plc(struct s_smc *smc);
+extern void mac_drv_clear_rxd(struct s_smc *smc,
+			      volatile struct s_smt_fp_rxd *rxd, int frag_count);
+
+#ifdef	USE_OS_CPY
+extern void hwm_cpy_rxd2mb(void);
+extern void hwm_cpy_txd2mb(void);
+#endif
+
+#ifdef	ALL_RX_COMPLETE
+extern void mac_drv_all_receives_complete(void);
+#endif
+
+extern u_long mac_drv_virt2phys(struct s_smc *smc, void *virt);
+extern u_long dma_master(struct s_smc *smc, void *virt, int len, int flag);
+
+#ifdef	NDIS_OS2
+extern void post_proc(void);
+#else
+extern void dma_complete(struct s_smc *smc, volatile union s_fp_descr *descr,
+			 int flag);
+#endif
+
+extern int init_fplus(struct s_smc *smc);
+extern int mac_drv_rx_init(struct s_smc *smc, int len, int fc, char *look_ahead,
+			   int la_len);
+
+/*
+	-------------------------------------------------------------
+	PUBLIC FUNCTIONS:
+	-------------------------------------------------------------
+*/
+void process_receive(struct s_smc *smc);
+void fddi_isr(struct s_smc *smc);
+void mac_drv_clear_txd(struct s_smc *smc);
+void smt_free_mbuf(struct s_smc *smc, SMbuf *mb);
+void init_driver_fplus(struct s_smc *smc);
+void mac_drv_rx_mode(struct s_smc *smc, int mode);
+void init_fddi_driver(struct s_smc *smc, u_char *mac_addr);
+void mac_drv_clear_tx_queue(struct s_smc *smc);
+void mac_drv_clear_rx_queue(struct s_smc *smc);
+void hwm_tx_frag(struct s_smc *smc, char far *virt, u_long phys, int len,
+		 int frame_status);
+void hwm_rx_frag(struct s_smc *smc, char far *virt, u_long phys, int len,
+		 int frame_status);
+
+int mac_drv_rx_frag(struct s_smc *smc, void far *virt, int len);
+int mac_drv_init(struct s_smc *smc);
+int hwm_tx_init(struct s_smc *smc, u_char fc, int frag_count, int frame_len,
+		int frame_status);
+
+u_int mac_drv_check_space(void);
+
+SMbuf* smt_get_mbuf(struct s_smc *smc);
+
+#ifdef DEBUG
+	void mac_drv_debug_lev(void);
+#endif
+
+/*
+	-------------------------------------------------------------
+	MACROS:
+	-------------------------------------------------------------
+*/
+#ifndef	UNUSED
+#ifdef	lint
+#define UNUSED(x)	(x) = (x)
+#else
+#define UNUSED(x)
+#endif
+#endif
+
+#ifdef	USE_CAN_ADDR
+#define MA		smc->hw.fddi_canon_addr.a
+#define	GROUP_ADDR_BIT	0x01
+#else
+#define	MA		smc->hw.fddi_home_addr.a
+#define	GROUP_ADDR_BIT	0x80
+#endif
+
+#define RXD_TXD_COUNT	(HWM_ASYNC_TXD_COUNT+HWM_SYNC_TXD_COUNT+\
+			SMT_R1_RXD_COUNT+SMT_R2_RXD_COUNT)
+
+#ifdef	MB_OUTSIDE_SMC
+#define	EXT_VIRT_MEM	((RXD_TXD_COUNT+1)*sizeof(struct s_smt_fp_txd) +\
+			MAX_MBUF*sizeof(SMbuf))
+#define	EXT_VIRT_MEM_2	((RXD_TXD_COUNT+1)*sizeof(struct s_smt_fp_txd))
+#else
+#define	EXT_VIRT_MEM	((RXD_TXD_COUNT+1)*sizeof(struct s_smt_fp_txd))
+#endif
+
+	/*
+	 * define critical read for 16 Bit drivers
+	 */
+#if	defined(NDIS_OS2) || defined(ODI2)
+#define CR_READ(var)	((var) & 0xffff0000 | ((var) & 0xffff))
+#else
+#define CR_READ(var)	(u_long)(var)
+#endif
+
+#define IMASK_SLOW	(IS_PLINT1 | IS_PLINT2 | IS_TIMINT | IS_TOKEN | \
+			 IS_MINTR1 | IS_MINTR2 | IS_MINTR3 | IS_R1_P | \
+			 IS_R1_C | IS_XA_C | IS_XS_C)
+
+/*
+	-------------------------------------------------------------
+	INIT- AND SMT FUNCTIONS:
+	-------------------------------------------------------------
+*/
+
+
+/*
+ *	BEGIN_MANUAL_ENTRY(mac_drv_check_space)
+ *	u_int mac_drv_check_space()
+ *
+ *	function	DOWNCALL	(drvsr.c)
+ *			This function calculates the needed non virtual
+ *			memory for MBufs, RxD and TxD descriptors etc.
+ *			needed by the driver.
+ *
+ *	return		u_int	memory in bytes
+ *
+ *	END_MANUAL_ENTRY
+ */
+u_int mac_drv_check_space(void)
+{
+#ifdef	MB_OUTSIDE_SMC
+#ifdef	COMMON_MB_POOL
+	call_count++ ;
+	if (call_count == 1) {
+		return(EXT_VIRT_MEM) ;
+	}
+	else {
+		return(EXT_VIRT_MEM_2) ;
+	}
+#else
+	return (EXT_VIRT_MEM) ;
+#endif
+#else
+	return (0) ;
+#endif
+}
+
+/*
+ *	BEGIN_MANUAL_ENTRY(mac_drv_init)
+ *	void mac_drv_init(smc)
+ *
+ *	function	DOWNCALL	(drvsr.c)
+ *			In this function the hardware module allocates it's
+ *			memory.
+ *			The operating system dependent module should call
+ *			mac_drv_init once, after the adatper is detected.
+ *	END_MANUAL_ENTRY
+ */
+int mac_drv_init(struct s_smc *smc)
+{
+	if (sizeof(struct s_smt_fp_rxd) % 16) {
+		SMT_PANIC(smc,HWM_E0001,HWM_E0001_MSG) ;
+	}
+	if (sizeof(struct s_smt_fp_txd) % 16) {
+		SMT_PANIC(smc,HWM_E0002,HWM_E0002_MSG) ;
+	}
+
+	/*
+	 * get the required memory for the RxDs and TxDs
+	 */
+	if (!(smc->os.hwm.descr_p = (union s_fp_descr volatile *)
+		mac_drv_get_desc_mem(smc,(u_int)
+		(RXD_TXD_COUNT+1)*sizeof(struct s_smt_fp_txd)))) {
+		return(1) ;	/* no space the hwm modul can't work */
+	}
+
+	/*
+	 * get the memory for the SMT MBufs
+	 */
+#ifndef	MB_OUTSIDE_SMC
+	smc->os.hwm.mbuf_pool.mb_start=(SMbuf *)(&smc->os.hwm.mbuf_pool.mb[0]) ;
+#else
+#ifndef	COMMON_MB_POOL
+	if (!(smc->os.hwm.mbuf_pool.mb_start = (SMbuf *) mac_drv_get_space(smc,
+		MAX_MBUF*sizeof(SMbuf)))) {
+		return(1) ;	/* no space the hwm modul can't work */
+	}
+#else
+	if (!mb_start) {
+		if (!(mb_start = (SMbuf *) mac_drv_get_space(smc,
+			MAX_MBUF*sizeof(SMbuf)))) {
+			return(1) ;	/* no space the hwm modul can't work */
+		}
+	}
+#endif
+#endif
+	return (0) ;
+}
+
+/*
+ *	BEGIN_MANUAL_ENTRY(init_driver_fplus)
+ *	init_driver_fplus(smc)
+ *
+ * Sets hardware modul specific values for the mode register 2
+ * (e.g. the byte alignment for the received frames, the position of the
+ *	 least significant byte etc.)
+ *	END_MANUAL_ENTRY
+ */
+void init_driver_fplus(struct s_smc *smc)
+{
+	smc->hw.fp.mdr2init = FM_LSB | FM_BMMODE | FM_ENNPRQ | FM_ENHSRQ | 3 ;
+
+#ifdef	PCI
+	smc->hw.fp.mdr2init |= FM_CHKPAR | FM_PARITY ;
+#endif
+	smc->hw.fp.mdr3init = FM_MENRQAUNLCK | FM_MENRS ;
+
+#ifdef	USE_CAN_ADDR
+	/* enable address bit swapping */
+	smc->hw.fp.frselreg_init = FM_ENXMTADSWAP | FM_ENRCVADSWAP ;
+#endif
+}
+
+static u_long init_descr_ring(struct s_smc *smc,
+			      union s_fp_descr volatile *start,
+			      int count)
+{
+	int i ;
+	union s_fp_descr volatile *d1 ;
+	union s_fp_descr volatile *d2 ;
+	u_long	phys ;
+
+	DB_GEN("descr ring starts at = %x ",(void *)start,0,3) ;
+	for (i=count-1, d1=start; i ; i--) {
+		d2 = d1 ;
+		d1++ ;		/* descr is owned by the host */
+		d2->r.rxd_rbctrl = AIX_REVERSE(BMU_CHECK) ;
+		d2->r.rxd_next = &d1->r ;
+		phys = mac_drv_virt2phys(smc,(void *)d1) ;
+		d2->r.rxd_nrdadr = AIX_REVERSE(phys) ;
+	}
+	DB_GEN("descr ring ends at = %x ",(void *)d1,0,3) ;
+	d1->r.rxd_rbctrl = AIX_REVERSE(BMU_CHECK) ;
+	d1->r.rxd_next = &start->r ;
+	phys = mac_drv_virt2phys(smc,(void *)start) ;
+	d1->r.rxd_nrdadr = AIX_REVERSE(phys) ;
+
+	for (i=count, d1=start; i ; i--) {
+		DRV_BUF_FLUSH(&d1->r,DDI_DMA_SYNC_FORDEV) ;
+		d1++;
+	}
+	return(phys) ;
+}
+
+static void init_txd_ring(struct s_smc *smc)
+{
+	struct s_smt_fp_txd volatile *ds ;
+	struct s_smt_tx_queue *queue ;
+	u_long	phys ;
+
+	/*
+	 * initialize the transmit descriptors
+	 */
+	ds = (struct s_smt_fp_txd volatile *) ((char *)smc->os.hwm.descr_p +
+		SMT_R1_RXD_COUNT*sizeof(struct s_smt_fp_rxd)) ;
+	queue = smc->hw.fp.tx[QUEUE_A0] ;
+	DB_GEN("Init async TxD ring, %d TxDs ",HWM_ASYNC_TXD_COUNT,0,3) ;
+	(void)init_descr_ring(smc,(union s_fp_descr volatile *)ds,
+		HWM_ASYNC_TXD_COUNT) ;
+	phys = AIX_REVERSE(ds->txd_ntdadr) ;
+	ds++ ;
+	queue->tx_curr_put = queue->tx_curr_get = ds ;
+	ds-- ;
+	queue->tx_free = HWM_ASYNC_TXD_COUNT ;
+	queue->tx_used = 0 ;
+	outpd(ADDR(B5_XA_DA),phys) ;
+
+	ds = (struct s_smt_fp_txd volatile *) ((char *)ds +
+		HWM_ASYNC_TXD_COUNT*sizeof(struct s_smt_fp_txd)) ;
+	queue = smc->hw.fp.tx[QUEUE_S] ;
+	DB_GEN("Init sync TxD ring, %d TxDs ",HWM_SYNC_TXD_COUNT,0,3) ;
+	(void)init_descr_ring(smc,(union s_fp_descr volatile *)ds,
+		HWM_SYNC_TXD_COUNT) ;
+	phys = AIX_REVERSE(ds->txd_ntdadr) ;
+	ds++ ;
+	queue->tx_curr_put = queue->tx_curr_get = ds ;
+	queue->tx_free = HWM_SYNC_TXD_COUNT ;
+	queue->tx_used = 0 ;
+	outpd(ADDR(B5_XS_DA),phys) ;
+}
+
+static void init_rxd_ring(struct s_smc *smc)
+{
+	struct s_smt_fp_rxd volatile *ds ;
+	struct s_smt_rx_queue *queue ;
+	u_long	phys ;
+
+	/*
+	 * initialize the receive descriptors
+	 */
+	ds = (struct s_smt_fp_rxd volatile *) smc->os.hwm.descr_p ;
+	queue = smc->hw.fp.rx[QUEUE_R1] ;
+	DB_GEN("Init RxD ring, %d RxDs ",SMT_R1_RXD_COUNT,0,3) ;
+	(void)init_descr_ring(smc,(union s_fp_descr volatile *)ds,
+		SMT_R1_RXD_COUNT) ;
+	phys = AIX_REVERSE(ds->rxd_nrdadr) ;
+	ds++ ;
+	queue->rx_curr_put = queue->rx_curr_get = ds ;
+	queue->rx_free = SMT_R1_RXD_COUNT ;
+	queue->rx_used = 0 ;
+	outpd(ADDR(B4_R1_DA),phys) ;
+}
+
+/*
+ *	BEGIN_MANUAL_ENTRY(init_fddi_driver)
+ *	void init_fddi_driver(smc,mac_addr)
+ *
+ * initializes the driver and it's variables
+ *
+ *	END_MANUAL_ENTRY
+ */
+void init_fddi_driver(struct s_smc *smc, u_char *mac_addr)
+{
+	SMbuf	*mb ;
+	int	i ;
+
+	init_board(smc,mac_addr) ;
+	(void)init_fplus(smc) ;
+
+	/*
+	 * initialize the SMbufs for the SMT
+	 */
+#ifndef	COMMON_MB_POOL
+	mb = smc->os.hwm.mbuf_pool.mb_start ;
+	smc->os.hwm.mbuf_pool.mb_free = (SMbuf *)NULL ;
+	for (i = 0; i < MAX_MBUF; i++) {
+		mb->sm_use_count = 1 ;
+		smt_free_mbuf(smc,mb)	;
+		mb++ ;
+	}
+#else
+	mb = mb_start ;
+	if (!mb_init) {
+		mb_free = 0 ;
+		for (i = 0; i < MAX_MBUF; i++) {
+			mb->sm_use_count = 1 ;
+			smt_free_mbuf(smc,mb)	;
+			mb++ ;
+		}
+		mb_init = TRUE ;
+	}
+#endif
+
+	/*
+	 * initialize the other variables
+	 */
+	smc->os.hwm.llc_rx_pipe = smc->os.hwm.llc_rx_tail = (SMbuf *)NULL ;
+	smc->os.hwm.txd_tx_pipe = smc->os.hwm.txd_tx_tail = NULL ;
+	smc->os.hwm.pass_SMT = smc->os.hwm.pass_NSA = smc->os.hwm.pass_DB = 0 ;
+	smc->os.hwm.pass_llc_promisc = TRUE ;
+	smc->os.hwm.queued_rx_frames = smc->os.hwm.queued_txd_mb = 0 ;
+	smc->os.hwm.detec_count = 0 ;
+	smc->os.hwm.rx_break = 0 ;
+	smc->os.hwm.rx_len_error = 0 ;
+	smc->os.hwm.isr_flag = FALSE ;
+
+	/*
+	 * make sure that the start pointer is 16 byte aligned
+	 */
+	i = 16 - ((long)smc->os.hwm.descr_p & 0xf) ;
+	if (i != 16) {
+		DB_GEN("i = %d",i,0,3) ;
+		smc->os.hwm.descr_p = (union s_fp_descr volatile *)
+			((char *)smc->os.hwm.descr_p+i) ;
+	}
+	DB_GEN("pt to descr area = %x",(void *)smc->os.hwm.descr_p,0,3) ;
+
+	init_txd_ring(smc) ;
+	init_rxd_ring(smc) ;
+	mac_drv_fill_rxd(smc) ;
+
+	init_plc(smc) ;
+}
+
+
+SMbuf *smt_get_mbuf(struct s_smc *smc)
+{
+	register SMbuf	*mb ;
+
+#ifndef	COMMON_MB_POOL
+	mb = smc->os.hwm.mbuf_pool.mb_free ;
+#else
+	mb = mb_free ;
+#endif
+	if (mb) {
+#ifndef	COMMON_MB_POOL
+		smc->os.hwm.mbuf_pool.mb_free = mb->sm_next ;
+#else
+		mb_free = mb->sm_next ;
+#endif
+		mb->sm_off = 8 ;
+		mb->sm_use_count = 1 ;
+	}
+	DB_GEN("get SMbuf: mb = %x",(void *)mb,0,3) ;
+	return (mb) ;	/* May be NULL */
+}
+
+void smt_free_mbuf(struct s_smc *smc, SMbuf *mb)
+{
+
+	if (mb) {
+		mb->sm_use_count-- ;
+		DB_GEN("free_mbuf: sm_use_count = %d",mb->sm_use_count,0,3) ;
+		/*
+		 * If the use_count is != zero the MBuf is queued
+		 * more than once and must not queued into the
+		 * free MBuf queue
+		 */
+		if (!mb->sm_use_count) {
+			DB_GEN("free SMbuf: mb = %x",(void *)mb,0,3) ;
+#ifndef	COMMON_MB_POOL
+			mb->sm_next = smc->os.hwm.mbuf_pool.mb_free ;
+			smc->os.hwm.mbuf_pool.mb_free = mb ;
+#else
+			mb->sm_next = mb_free ;
+			mb_free = mb ;
+#endif
+		}
+	}
+	else
+		SMT_PANIC(smc,HWM_E0003,HWM_E0003_MSG) ;
+}
+
+
+/*
+ *	BEGIN_MANUAL_ENTRY(mac_drv_repair_descr)
+ *	void mac_drv_repair_descr(smc)
+ *
+ * function	called from SMT	(HWM / hwmtm.c)
+ *		The BMU is idle when this function is called.
+ *		Mac_drv_repair_descr sets up the physical address
+ *		for all receive and transmit queues where the BMU
+ *		should continue.
+ *		It may be that the BMU was reseted during a fragmented
+ *		transfer. In this case there are some fragments which will
+ *		never completed by the BMU. The OWN bit of this fragments
+ *		must be switched to be owned by the host.
+ *
+ *		Give a start command to the receive BMU.
+ *		Start the transmit BMUs if transmit frames pending.
+ *
+ *	END_MANUAL_ENTRY
+ */
+void mac_drv_repair_descr(struct s_smc *smc)
+{
+	u_long	phys ;
+
+	if (smc->hw.hw_state != STOPPED) {
+		SK_BREAK() ;
+		SMT_PANIC(smc,HWM_E0013,HWM_E0013_MSG) ;
+		return ;
+	}
+
+	/*
+	 * repair tx queues: don't start
+	 */
+	phys = repair_txd_ring(smc,smc->hw.fp.tx[QUEUE_A0]) ;
+	outpd(ADDR(B5_XA_DA),phys) ;
+	if (smc->hw.fp.tx_q[QUEUE_A0].tx_used) {
+		outpd(ADDR(B0_XA_CSR),CSR_START) ;
+	}
+	phys = repair_txd_ring(smc,smc->hw.fp.tx[QUEUE_S]) ;
+	outpd(ADDR(B5_XS_DA),phys) ;
+	if (smc->hw.fp.tx_q[QUEUE_S].tx_used) {
+		outpd(ADDR(B0_XS_CSR),CSR_START) ;
+	}
+
+	/*
+	 * repair rx queues
+	 */
+	phys = repair_rxd_ring(smc,smc->hw.fp.rx[QUEUE_R1]) ;
+	outpd(ADDR(B4_R1_DA),phys) ;
+	outpd(ADDR(B0_R1_CSR),CSR_START) ;
+}
+
+static u_long repair_txd_ring(struct s_smc *smc, struct s_smt_tx_queue *queue)
+{
+	int i ;
+	int tx_used ;
+	u_long phys ;
+	u_long tbctrl ;
+	struct s_smt_fp_txd volatile *t ;
+
+	SK_UNUSED(smc) ;
+
+	t = queue->tx_curr_get ;
+	tx_used = queue->tx_used ;
+	for (i = tx_used+queue->tx_free-1 ; i ; i-- ) {
+		t = t->txd_next ;
+	}
+	phys = AIX_REVERSE(t->txd_ntdadr) ;
+
+	t = queue->tx_curr_get ;
+	while (tx_used) {
+		DRV_BUF_FLUSH(t,DDI_DMA_SYNC_FORCPU) ;
+		tbctrl = AIX_REVERSE(t->txd_tbctrl) ;
+
+		if (tbctrl & BMU_OWN) {
+			if (tbctrl & BMU_STF) {
+				break ;		/* exit the loop */
+			}
+			else {
+				/*
+				 * repair the descriptor
+				 */
+				t->txd_tbctrl &= AIX_REVERSE(~BMU_OWN) ;
+			}
+		}
+		phys = AIX_REVERSE(t->txd_ntdadr) ;
+		DRV_BUF_FLUSH(t,DDI_DMA_SYNC_FORDEV) ;
+		t = t->txd_next ;
+		tx_used-- ;
+	}
+	return(phys) ;
+}
+
+/*
+ * Repairs the receive descriptor ring and returns the physical address
+ * where the BMU should continue working.
+ *
+ *	o The physical address where the BMU was stopped has to be
+ *	  determined. This is the next RxD after rx_curr_get with an OWN
+ *	  bit set.
+ *	o The BMU should start working at beginning of the next frame.
+ *	  RxDs with an OWN bit set but with a reset STF bit should be
+ *	  skipped and owned by the driver (OWN = 0). 
+ */
+static u_long repair_rxd_ring(struct s_smc *smc, struct s_smt_rx_queue *queue)
+{
+	int i ;
+	int rx_used ;
+	u_long phys ;
+	u_long rbctrl ;
+	struct s_smt_fp_rxd volatile *r ;
+
+	SK_UNUSED(smc) ;
+
+	r = queue->rx_curr_get ;
+	rx_used = queue->rx_used ;
+	for (i = SMT_R1_RXD_COUNT-1 ; i ; i-- ) {
+		r = r->rxd_next ;
+	}
+	phys = AIX_REVERSE(r->rxd_nrdadr) ;
+
+	r = queue->rx_curr_get ;
+	while (rx_used) {
+		DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORCPU) ;
+		rbctrl = AIX_REVERSE(r->rxd_rbctrl) ;
+
+		if (rbctrl & BMU_OWN) {
+			if (rbctrl & BMU_STF) {
+				break ;		/* exit the loop */
+			}
+			else {
+				/*
+				 * repair the descriptor
+				 */
+				r->rxd_rbctrl &= AIX_REVERSE(~BMU_OWN) ;
+			}
+		}
+		phys = AIX_REVERSE(r->rxd_nrdadr) ;
+		DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORDEV) ;
+		r = r->rxd_next ;
+		rx_used-- ;
+	}
+	return(phys) ;
+}
+
+
+/*
+	-------------------------------------------------------------
+	INTERRUPT SERVICE ROUTINE:
+	-------------------------------------------------------------
+*/
+
+/*
+ *	BEGIN_MANUAL_ENTRY(fddi_isr)
+ *	void fddi_isr(smc)
+ *
+ * function	DOWNCALL	(drvsr.c)
+ *		interrupt service routine, handles the interrupt requests
+ *		generated by the FDDI adapter.
+ *
+ * NOTE:	The operating system dependent module must garantee that the
+ *		interrupts of the adapter are disabled when it calls fddi_isr.
+ *
+ *	About the USE_BREAK_ISR mechanismn:
+ *
+ *	The main requirement of this mechanismn is to force an timer IRQ when
+ *	leaving process_receive() with leave_isr set. process_receive() may
+ *	be called at any time from anywhere!
+ *	To be sure we don't miss such event we set 'force_irq' per default.
+ *	We have to force and Timer IRQ if 'smc->os.hwm.leave_isr' AND
+ *	'force_irq' are set. 'force_irq' may be reset if a receive complete
+ *	IRQ is pending.
+ *
+ *	END_MANUAL_ENTRY
+ */
+void fddi_isr(struct s_smc *smc)
+{
+	u_long		is ;		/* ISR source */
+	u_short		stu, stl ;
+	SMbuf		*mb ;
+
+#ifdef	USE_BREAK_ISR
+	int	force_irq ;
+#endif
+
+#ifdef	ODI2
+	if (smc->os.hwm.rx_break) {
+		mac_drv_fill_rxd(smc) ;
+		if (smc->hw.fp.rx_q[QUEUE_R1].rx_used > 0) {
+			smc->os.hwm.rx_break = 0 ;
+			process_receive(smc) ;
+		}
+		else {
+			smc->os.hwm.detec_count = 0 ;
+			smt_force_irq(smc) ;
+		}
+	}
+#endif
+	smc->os.hwm.isr_flag = TRUE ;
+
+#ifdef	USE_BREAK_ISR
+	force_irq = TRUE ;
+	if (smc->os.hwm.leave_isr) {
+		smc->os.hwm.leave_isr = FALSE ;
+		process_receive(smc) ;
+	}
+#endif
+
+	while ((is = GET_ISR() & ISR_MASK)) {
+		NDD_TRACE("CH0B",is,0,0) ;
+		DB_GEN("ISA = 0x%x",is,0,7) ;
+
+		if (is & IMASK_SLOW) {
+			NDD_TRACE("CH1b",is,0,0) ;
+			if (is & IS_PLINT1) {	/* PLC1 */
+				plc1_irq(smc) ;
+			}
+			if (is & IS_PLINT2) {	/* PLC2 */
+				plc2_irq(smc) ;
+			}
+			if (is & IS_MINTR1) {	/* FORMAC+ STU1(U/L) */
+				stu = inpw(FM_A(FM_ST1U)) ;
+				stl = inpw(FM_A(FM_ST1L)) ;
+				DB_GEN("Slow transmit complete",0,0,6) ;
+				mac1_irq(smc,stu,stl) ;
+			}
+			if (is & IS_MINTR2) {	/* FORMAC+ STU2(U/L) */
+				stu= inpw(FM_A(FM_ST2U)) ;
+				stl= inpw(FM_A(FM_ST2L)) ;
+				DB_GEN("Slow receive complete",0,0,6) ;
+				DB_GEN("stl = %x : stu = %x",stl,stu,7) ;
+				mac2_irq(smc,stu,stl) ;
+			}
+			if (is & IS_MINTR3) {	/* FORMAC+ STU3(U/L) */
+				stu= inpw(FM_A(FM_ST3U)) ;
+				stl= inpw(FM_A(FM_ST3L)) ;
+				DB_GEN("FORMAC Mode Register 3",0,0,6) ;
+				mac3_irq(smc,stu,stl) ;
+			}
+			if (is & IS_TIMINT) {	/* Timer 82C54-2 */
+				timer_irq(smc) ;
+#ifdef	NDIS_OS2
+				force_irq_pending = 0 ;
+#endif
+				/*
+				 * out of RxD detection
+				 */
+				if (++smc->os.hwm.detec_count > 4) {
+					/*
+					 * check out of RxD condition
+					 */
+					 process_receive(smc) ;
+				}
+			}
+			if (is & IS_TOKEN) {	/* Restricted Token Monitor */
+				rtm_irq(smc) ;
+			}
+			if (is & IS_R1_P) {	/* Parity error rx queue 1 */
+				/* clear IRQ */
+				outpd(ADDR(B4_R1_CSR),CSR_IRQ_CL_P) ;
+				SMT_PANIC(smc,HWM_E0004,HWM_E0004_MSG) ;
+			}
+			if (is & IS_R1_C) {	/* Encoding error rx queue 1 */
+				/* clear IRQ */
+				outpd(ADDR(B4_R1_CSR),CSR_IRQ_CL_C) ;
+				SMT_PANIC(smc,HWM_E0005,HWM_E0005_MSG) ;
+			}
+			if (is & IS_XA_C) {	/* Encoding error async tx q */
+				/* clear IRQ */
+				outpd(ADDR(B5_XA_CSR),CSR_IRQ_CL_C) ;
+				SMT_PANIC(smc,HWM_E0006,HWM_E0006_MSG) ;
+			}
+			if (is & IS_XS_C) {	/* Encoding error sync tx q */
+				/* clear IRQ */
+				outpd(ADDR(B5_XS_CSR),CSR_IRQ_CL_C) ;
+				SMT_PANIC(smc,HWM_E0007,HWM_E0007_MSG) ;
+			}
+		}
+
+		/*
+		 *	Fast Tx complete Async/Sync Queue (BMU service)
+		 */
+		if (is & (IS_XS_F|IS_XA_F)) {
+			DB_GEN("Fast tx complete queue",0,0,6) ;
+			/*
+			 * clear IRQ, Note: no IRQ is lost, because
+			 * 	we always service both queues
+			 */
+			outpd(ADDR(B5_XS_CSR),CSR_IRQ_CL_F) ;
+			outpd(ADDR(B5_XA_CSR),CSR_IRQ_CL_F) ;
+			mac_drv_clear_txd(smc) ;
+			llc_restart_tx(smc) ;
+		}
+
+		/*
+		 *	Fast Rx Complete (BMU service)
+		 */
+		if (is & IS_R1_F) {
+			DB_GEN("Fast receive complete",0,0,6) ;
+			/* clear IRQ */
+#ifndef USE_BREAK_ISR
+			outpd(ADDR(B4_R1_CSR),CSR_IRQ_CL_F) ;
+			process_receive(smc) ;
+#else
+			process_receive(smc) ;
+			if (smc->os.hwm.leave_isr) {
+				force_irq = FALSE ;
+			} else {
+				outpd(ADDR(B4_R1_CSR),CSR_IRQ_CL_F) ;
+				process_receive(smc) ;
+			}
+#endif
+		}
+
+#ifndef	NDIS_OS2
+		while ((mb = get_llc_rx(smc))) {
+			smt_to_llc(smc,mb) ;
+		}
+#else
+		if (offDepth)
+			post_proc() ;
+
+		while (!offDepth && (mb = get_llc_rx(smc))) {
+			smt_to_llc(smc,mb) ;
+		}
+
+		if (!offDepth && smc->os.hwm.rx_break) {
+			process_receive(smc) ;
+		}
+#endif
+		if (smc->q.ev_get != smc->q.ev_put) {
+			NDD_TRACE("CH2a",0,0,0) ;
+			ev_dispatcher(smc) ;
+		}
+#ifdef	NDIS_OS2
+		post_proc() ;
+		if (offDepth) {		/* leave fddi_isr because */
+			break ;		/* indications not allowed */
+		}
+#endif
+#ifdef	USE_BREAK_ISR
+		if (smc->os.hwm.leave_isr) {
+			break ;		/* leave fddi_isr */
+		}
+#endif
+
+		/* NOTE: when the isr is left, no rx is pending */
+	}	/* end of interrupt source polling loop */
+
+#ifdef	USE_BREAK_ISR
+	if (smc->os.hwm.leave_isr && force_irq) {
+		smt_force_irq(smc) ;
+	}
+#endif
+	smc->os.hwm.isr_flag = FALSE ;
+	NDD_TRACE("CH0E",0,0,0) ;
+}
+
+
+/*
+	-------------------------------------------------------------
+	RECEIVE FUNCTIONS:
+	-------------------------------------------------------------
+*/
+
+#ifndef	NDIS_OS2
+/*
+ *	BEGIN_MANUAL_ENTRY(mac_drv_rx_mode)
+ *	void mac_drv_rx_mode(smc,mode)
+ *
+ * function	DOWNCALL	(fplus.c)
+ *		Corresponding to the parameter mode, the operating system
+ *		dependent module can activate several receive modes.
+ *
+ * para	mode	= 1:	RX_ENABLE_ALLMULTI	enable all multicasts
+ *		= 2:	RX_DISABLE_ALLMULTI	disable "enable all multicasts"
+ *		= 3:	RX_ENABLE_PROMISC	enable promiscuous
+ *		= 4:	RX_DISABLE_PROMISC	disable promiscuous
+ *		= 5:	RX_ENABLE_NSA		enable rec. of all NSA frames
+ *			(disabled after 'driver reset' & 'set station address')
+ *		= 6:	RX_DISABLE_NSA		disable rec. of all NSA frames
+ *
+ *		= 21:	RX_ENABLE_PASS_SMT	( see description )
+ *		= 22:	RX_DISABLE_PASS_SMT	(  "	   "	  )
+ *		= 23:	RX_ENABLE_PASS_NSA	(  "	   "	  )
+ *		= 24:	RX_DISABLE_PASS_NSA	(  "	   "	  )
+ *		= 25:	RX_ENABLE_PASS_DB	(  "	   "	  )
+ *		= 26:	RX_DISABLE_PASS_DB	(  "	   "	  )
+ *		= 27:	RX_DISABLE_PASS_ALL	(  "	   "	  )
+ *		= 28:	RX_DISABLE_LLC_PROMISC	(  "	   "	  )
+ *		= 29:	RX_ENABLE_LLC_PROMISC	(  "	   "	  )
+ *
+ *
+ *		RX_ENABLE_PASS_SMT / RX_DISABLE_PASS_SMT
+ *
+ *		If the operating system dependent module activates the
+ *		mode RX_ENABLE_PASS_SMT, the hardware module
+ *		duplicates all SMT frames with the frame control
+ *		FC_SMT_INFO and passes them to the LLC receive channel
+ *		by calling mac_drv_rx_init.
+ *		The SMT Frames which are sent by the local SMT and the NSA
+ *		frames whose A- and C-Indicator is not set are also duplicated
+ *		and passed.
+ *		The receive mode RX_DISABLE_PASS_SMT disables the passing
+ *		of SMT frames.
+ *
+ *		RX_ENABLE_PASS_NSA / RX_DISABLE_PASS_NSA
+ *
+ *		If the operating system dependent module activates the
+ *		mode RX_ENABLE_PASS_NSA, the hardware module
+ *		duplicates all NSA frames with frame control FC_SMT_NSA
+ *		and a set A-Indicator and passed them to the LLC
+ *		receive channel by calling mac_drv_rx_init.
+ *		All NSA Frames which are sent by the local SMT
+ *		are also duplicated and passed.
+ *		The receive mode RX_DISABLE_PASS_NSA disables the passing
+ *		of NSA frames with the A- or C-Indicator set.
+ *
+ * NOTE:	For fear that the hardware module receives NSA frames with
+ *		a reset A-Indicator, the operating system dependent module
+ *		has to call mac_drv_rx_mode with the mode RX_ENABLE_NSA
+ *		before activate the RX_ENABLE_PASS_NSA mode and after every
+ *		'driver reset' and 'set station address'.
+ *
+ *		RX_ENABLE_PASS_DB / RX_DISABLE_PASS_DB
+ *
+ *		If the operating system dependent module activates the
+ *		mode RX_ENABLE_PASS_DB, direct BEACON frames
+ *		(FC_BEACON frame control) are passed to the LLC receive
+ *		channel by mac_drv_rx_init.
+ *		The receive mode RX_DISABLE_PASS_DB disables the passing
+ *		of direct BEACON frames.
+ *
+ *		RX_DISABLE_PASS_ALL
+ *
+ *		Disables all special receives modes. It is equal to
+ *		call mac_drv_set_rx_mode successively with the
+ *		parameters RX_DISABLE_NSA, RX_DISABLE_PASS_SMT,
+ *		RX_DISABLE_PASS_NSA and RX_DISABLE_PASS_DB.
+ *
+ *		RX_ENABLE_LLC_PROMISC
+ *
+ *		(default) all received LLC frames and all SMT/NSA/DBEACON
+ *		frames depending on the attitude of the flags
+ *		PASS_SMT/PASS_NSA/PASS_DBEACON will be delivered to the
+ *		LLC layer
+ *
+ *		RX_DISABLE_LLC_PROMISC
+ *
+ *		all received SMT/NSA/DBEACON frames depending on the
+ *		attitude of the flags PASS_SMT/PASS_NSA/PASS_DBEACON
+ *		will be delivered to the LLC layer.
+ *		all received LLC frames with a directed address, Multicast
+ *		or Broadcast address will be delivered to the LLC
+ *		layer too.
+ *
+ *	END_MANUAL_ENTRY
+ */
+void mac_drv_rx_mode(struct s_smc *smc, int mode)
+{
+	switch(mode) {
+	case RX_ENABLE_PASS_SMT:
+		smc->os.hwm.pass_SMT = TRUE ;
+		break ;
+	case RX_DISABLE_PASS_SMT:
+		smc->os.hwm.pass_SMT = FALSE ;
+		break ;
+	case RX_ENABLE_PASS_NSA:
+		smc->os.hwm.pass_NSA = TRUE ;
+		break ;
+	case RX_DISABLE_PASS_NSA:
+		smc->os.hwm.pass_NSA = FALSE ;
+		break ;
+	case RX_ENABLE_PASS_DB:
+		smc->os.hwm.pass_DB = TRUE ;
+		break ;
+	case RX_DISABLE_PASS_DB:
+		smc->os.hwm.pass_DB = FALSE ;
+		break ;
+	case RX_DISABLE_PASS_ALL:
+		smc->os.hwm.pass_SMT = smc->os.hwm.pass_NSA = FALSE ;
+		smc->os.hwm.pass_DB = FALSE ;
+		smc->os.hwm.pass_llc_promisc = TRUE ;
+		mac_set_rx_mode(smc,RX_DISABLE_NSA) ;
+		break ;
+	case RX_DISABLE_LLC_PROMISC:
+		smc->os.hwm.pass_llc_promisc = FALSE ;
+		break ;
+	case RX_ENABLE_LLC_PROMISC:
+		smc->os.hwm.pass_llc_promisc = TRUE ;
+		break ;
+	case RX_ENABLE_ALLMULTI:
+	case RX_DISABLE_ALLMULTI:
+	case RX_ENABLE_PROMISC:
+	case RX_DISABLE_PROMISC:
+	case RX_ENABLE_NSA:
+	case RX_DISABLE_NSA:
+	default:
+		mac_set_rx_mode(smc,mode) ;
+		break ;
+	}
+}
+#endif	/* ifndef NDIS_OS2 */
+
+/*
+ * process receive queue
+ */
+void process_receive(struct s_smc *smc)
+{
+	int i ;
+	int n ;
+	int frag_count ;		/* number of RxDs of the curr rx buf */
+	int used_frags ;		/* number of RxDs of the curr frame */
+	struct s_smt_rx_queue *queue ;	/* points to the queue ctl struct */
+	struct s_smt_fp_rxd volatile *r ;	/* rxd pointer */
+	struct s_smt_fp_rxd volatile *rxd ;	/* first rxd of rx frame */
+	u_long rbctrl ;			/* receive buffer control word */
+	u_long rfsw ;			/* receive frame status word */
+	u_short rx_used ;
+	u_char far *virt ;
+	char far *data ;
+	SMbuf *mb ;
+	u_char fc ;			/* Frame control */
+	int len ;			/* Frame length */
+
+	smc->os.hwm.detec_count = 0 ;
+	queue = smc->hw.fp.rx[QUEUE_R1] ;
+	NDD_TRACE("RHxB",0,0,0) ;
+	for ( ; ; ) {
+		r = queue->rx_curr_get ;
+		rx_used = queue->rx_used ;
+		frag_count = 0 ;
+
+#ifdef	USE_BREAK_ISR
+		if (smc->os.hwm.leave_isr) {
+			goto rx_end ;
+		}
+#endif
+#ifdef	NDIS_OS2
+		if (offDepth) {
+			smc->os.hwm.rx_break = 1 ;
+			goto rx_end ;
+		}
+		smc->os.hwm.rx_break = 0 ;
+#endif
+#ifdef	ODI2
+		if (smc->os.hwm.rx_break) {
+			goto rx_end ;
+		}
+#endif
+		n = 0 ;
+		do {
+			DB_RX("Check RxD %x for OWN and EOF",(void *)r,0,5) ;
+			DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORCPU) ;
+			rbctrl = CR_READ(r->rxd_rbctrl) ;
+			rbctrl = AIX_REVERSE(rbctrl) ;
+
+			if (rbctrl & BMU_OWN) {
+				NDD_TRACE("RHxE",r,rfsw,rbctrl) ;
+				DB_RX("End of RxDs",0,0,4) ;
+				goto rx_end ;
+			}
+			/*
+			 * out of RxD detection
+			 */
+			if (!rx_used) {
+				SK_BREAK() ;
+				SMT_PANIC(smc,HWM_E0009,HWM_E0009_MSG) ;
+				/* Either we don't have an RxD or all
+				 * RxDs are filled. Therefore it's allowed
+				 * for to set the STOPPED flag */
+				smc->hw.hw_state = STOPPED ;
+				mac_drv_clear_rx_queue(smc) ;
+				smc->hw.hw_state = STARTED ;
+				mac_drv_fill_rxd(smc) ;
+				smc->os.hwm.detec_count = 0 ;
+				goto rx_end ;
+			}
+			rfsw = AIX_REVERSE(r->rxd_rfsw) ;
+			if ((rbctrl & BMU_STF) != ((rbctrl & BMU_ST_BUF) <<5)) {
+				/*
+				 * The BMU_STF bit is deleted, 1 frame is
+				 * placed into more than 1 rx buffer
+				 *
+				 * skip frame by setting the rx len to 0
+				 *
+				 * if fragment count == 0
+				 *	The missing STF bit belongs to the
+				 *	current frame, search for the
+				 *	EOF bit to complete the frame
+				 * else
+				 *	the fragment belongs to the next frame,
+				 *	exit the loop and process the frame
+				 */
+				SK_BREAK() ;
+				rfsw = 0 ;
+				if (frag_count) {
+					break ;
+				}
+			}
+			n += rbctrl & 0xffff ;
+			r = r->rxd_next ;
+			frag_count++ ;
+			rx_used-- ;
+		} while (!(rbctrl & BMU_EOF)) ;
+		used_frags = frag_count ;
+		DB_RX("EOF set in RxD, used_frags = %d ",used_frags,0,5) ;
+
+		/* may be next 2 DRV_BUF_FLUSH() can be skipped, because */
+		/* BMU_ST_BUF will not be changed by the ASIC */
+		DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORCPU) ;
+		while (rx_used && !(r->rxd_rbctrl & AIX_REVERSE(BMU_ST_BUF))) {
+			DB_RX("Check STF bit in %x",(void *)r,0,5) ;
+			r = r->rxd_next ;
+			DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORCPU) ;
+			frag_count++ ;
+			rx_used-- ;
+		}
+		DB_RX("STF bit found",0,0,5) ;
+
+		/*
+		 * The received frame is finished for the process receive
+		 */
+		rxd = queue->rx_curr_get ;
+		queue->rx_curr_get = r ;
+		queue->rx_free += frag_co