X-Git-Url: http://git.joshuawise.com/netwatch.git/blobdiff_plain/047916ed37a8497d26e5e09345385651feaeebe5..80c7c8bffb0bdf3bc667a00bccae4dfe877906d4:/net/3c90x.c

diff --git a/net/3c90x.c b/net/3c90x.c
index ae8a771..74035e0 100644
--- a/net/3c90x.c
+++ b/net/3c90x.c
@@ -45,13 +45,14 @@
 #include <pci-bother.h>
 #include <minilib.h>
 #include <output.h>
+#include <paging.h>
 
 #define	XCVR_MAGIC	(0x5A00)
 /** any single transmission fails after 16 collisions or other errors
  ** this is the number of times to retry the transmission -- this should
  ** be plenty
  **/
-#define	XMIT_RETRIES	1
+#define	XMIT_RETRIES	5
 
 /*** Register definitions for the 3c905 ***/
 enum Registers
@@ -217,28 +218,24 @@ enum Commands
 #define INT_CMDINPROGRESS	(1<<12)
 #define INT_WINDOWNUMBER	(7<<13)
 
+/* These structures are all 64-bit aligned, as needed for bus-mastering I/O. */
+typedef struct {
+	unsigned int addr;
+	unsigned int len;
+} segment_t __attribute__ ((aligned(8)));
 
-/*** TX descriptor ***/
-typedef struct
-    {
-    unsigned int	DnNextPtr;
-    unsigned int	FrameStartHeader;
-    unsigned int	HdrAddr;
-    unsigned int	HdrLength;
-    unsigned int	DataAddr;
-    unsigned int	DataLength;
-    }
-    TXD __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */
+typedef struct {
+	unsigned int next;
+	unsigned int hdr;
+	segment_t segments[64 /* XXX magic */];
+} txdesc_t __attribute__ ((aligned(8)));
 
 /*** RX descriptor ***/
-typedef struct
-    {
-    unsigned int	UpNextPtr;
-    unsigned int	UpPktStatus;
-    unsigned int	DataAddr;
-    unsigned int	DataLength;
-    }
-    RXD __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */
+typedef struct {
+	unsigned int	next;
+	unsigned int	status;
+	segment_t segments[64];
+} rxdesc_t __attribute__ ((aligned(8)));
 
 /*** Global variables ***/
 static struct
@@ -248,11 +245,14 @@ static struct
     unsigned char	CurrentWindow;
     unsigned int	IOAddr;
     unsigned char	HWAddr[ETH_ALEN];
-    TXD			TransmitDPD;
-    RXD			ReceiveUPD;
     }
     INF_3C90X;
+
 static struct nic nic;
+static txdesc_t txdesc;
+static rxdesc_t rxdesc;
+static struct pbuf *currecv;
+
 
 #define _outl(v,a) outl((a),(v))
 #define _outw(v,a) outw((a),(v))
@@ -406,13 +406,6 @@ a3c90x_internal_WriteEeprom(int ioaddr, int address, unsigned short value)
  ***/
 static void a3c90x_reset(void)
     {
-#ifdef	CFG_3C90X_PRESERVE_XCVR
-    int cfg;
-    /** Read the current InternalConfig value. **/
-    _set_window(INF_3C90X.IOAddr, winTxRxOptions3);
-    cfg = inl(INF_3C90X.IOAddr + regInternalConfig_3_l);
-#endif
-
     /** Send the reset command to the card **/
     outputf("3c90x: issuing RESET");
     _issue_command(INF_3C90X.IOAddr, cmdGlobalReset, 0);
@@ -425,18 +418,6 @@ static void a3c90x_reset(void)
     _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+2);
     _outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+4);
 
-#ifdef	CFG_3C90X_PRESERVE_XCVR
-    /** Re-set the original InternalConfig value from before reset **/
-    _set_window(INF_3C90X.IOAddr, winTxRxOptions3);
-    _outl(cfg, INF_3C90X.IOAddr + regInternalConfig_3_l);
-
-    /** enable DC converter for 10-Base-T **/
-    if ((cfg&0x0300) == 0x0300)
-	{
-	_issue_command(INF_3C90X.IOAddr, cmdEnableDcConverter, 0);
-	}
-#endif
-
     /** Issue transmit reset, wait for command completion **/
     _issue_command(INF_3C90X.IOAddr, cmdTxReset, 0);
     if (! INF_3C90X.isBrev)
@@ -474,172 +455,172 @@ static void a3c90x_reset(void)
  *** pkt - the pointer to the packet data itself.
  ***/
 static void
-a3c90x_transmit(const char *dest_addr, unsigned int proto,
-                unsigned int size, const char *pkt)
+a3c90x_transmit(struct pbuf *p)
 {
-	struct eth_hdr
-	{
-		unsigned char dst_addr[ETH_ALEN];
-		unsigned char src_addr[ETH_ALEN];
-		unsigned short type;
-	} hdr;
-		
 	unsigned char status;
-	unsigned int i, retries;
-
-	for (retries=0; retries < XMIT_RETRIES; retries++)
+	static struct pbuf *oldpbuf = NULL;
+	unsigned int n, len;
+	
+	if (oldpbuf)
 	{
-		if (retries != 0)
-			outputf("3c90x: retrying packet send (%d)", retries);
-		
-		/** Stall the download engine **/
-		outputf("3c90x: stalling transmit engine");
-		_issue_command(INF_3C90X.IOAddr, cmdStallCtl, 2 /* Stall download */);
-
-		hdr.type = htons(proto);
-		memcpy(hdr.dst_addr, dest_addr, ETH_ALEN);
-		memcpy(hdr.src_addr, INF_3C90X.HWAddr, ETH_ALEN);
-
-		/** Setup the DPD (download descriptor) **/
-		INF_3C90X.TransmitDPD.DnNextPtr = 0;
-		/** set notification for transmission completion (bit 15) **/
-		INF_3C90X.TransmitDPD.FrameStartHeader = (size + sizeof(hdr)) /*| 0x8000*/;
-		INF_3C90X.TransmitDPD.HdrAddr = virt_to_bus(&hdr);
-		INF_3C90X.TransmitDPD.HdrLength = sizeof(hdr);
-		INF_3C90X.TransmitDPD.DataAddr = virt_to_bus(pkt);
-		INF_3C90X.TransmitDPD.DataLength = size + (1<<31);
-
-		/** Send the packet **/
-		outputf("3c90x: pointing card at %08x", virt_to_bus(&(INF_3C90X.TransmitDPD)));
-		outl(INF_3C90X.IOAddr + regDnListPtr_l, virt_to_bus(&(INF_3C90X.TransmitDPD)));
-
-		outputf("3c90x: unstalling transmit engine");
-		_issue_command(INF_3C90X.IOAddr, cmdStallCtl, 3 /* Unstall download */);
-		
-		outputf("3c90x: waiting for download pointer");
-		oneshot_start_ms(100);
-		while((inl(INF_3C90X.IOAddr + regDnListPtr_l) != 0) && oneshot_running())
-			;
-		if (!oneshot_running())
-		{
-			outputf("3c90x: Download engine pointer timeout");
-		}
-
-		outputf("3c90x: waiting for TXCOMPLETE");
-		oneshot_start_ms(10);	/* Give it 10 ms */
 		while (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_TXCOMPLETE) && oneshot_running())
 			;
-
 		if (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_TXCOMPLETE))
 		{
 			outputf("3c90x: tx timeout? txstat %02x", inb(INF_3C90X.IOAddr + regTxStatus_b));
 			outputf("3c90x: Gen sts %04x", inw(INF_3C90X.IOAddr + regCommandIntStatus_w));
-			continue;
 		}
 		status = inb(INF_3C90X.IOAddr + regTxStatus_b);
 		outb(INF_3C90X.IOAddr + regTxStatus_b, 0x00);
-		
-		/** successful completion (sans "interrupt Requested" bit) **/
-		if ((status & 0xbf) == 0x80)
-			return;
+		pbuf_free(oldpbuf);
+		oldpbuf = NULL;
+	}
 
-		outputf("3c90x: Status (%hhX)", status);
-		/** check error codes **/
-		if (status & 0x02)
-		{
-			outputf("3c90x: Tx Reclaim Error (%hhX)", status);
-			a3c90x_reset();
-		} else if (status & 0x04) {
-			outputf("3c90x: Tx Status Overflow (%hhX)", status);
-			for (i=0; i<32; i++)
-				_outb(0x00, INF_3C90X.IOAddr + regTxStatus_b);
-			/** must re-enable after max collisions before re-issuing tx **/
-			_issue_command(INF_3C90X.IOAddr, cmdTxEnable, 0);
-		} else if (status & 0x08) {
-			outputf("3c90x: Tx Max Collisions (%hhX)", status);
-			/** must re-enable after max collisions before re-issuing tx **/
-			_issue_command(INF_3C90X.IOAddr, cmdTxEnable, 0);
-		} else if (status & 0x10) {
-			outputf("3c90x: Tx Underrun (%hhX)", status);
-			a3c90x_reset();
-		} else if (status & 0x20) {
-			outputf("3c90x: Tx Jabber (%hhX)", status);
-			a3c90x_reset();
-		} else if ((status & 0x80) != 0x80) {
-			outputf("3c90x: Internal Error - Incomplete Transmission (%hhX)", status);
-			a3c90x_reset();
-		}
+	_issue_command(INF_3C90X.IOAddr, cmdStallCtl, 2 /* Stall download */);
+
+	/** Setup the DPD (download descriptor) **/
+	txdesc.next = 0;
+	len = 0;
+	n = 0;
+	oldpbuf = p;
+	for (; p; p = p->next)
+	{
+		txdesc.segments[n].addr = v2p(p->payload);
+		txdesc.segments[n].len = p->len | (p->next ? 0 : (1 << 31));
+		len += p->len;
+		pbuf_ref(p);
+		n++;
 	}
+	/** set notification for transmission completion (bit 15) **/
+	txdesc.hdr = (len) | 0x8000;
+	
+	outputf("3c90x: Sending %d byte %d seg packet", len, n);
 
-	/** failed after RETRY attempts **/
-	outputf("3c90x: Failed to send after %d retries", retries);
-	return;
-}
+	/** Send the packet **/
+	outl(INF_3C90X.IOAddr + regDnListPtr_l, v2p(&txdesc));
+	_issue_command(INF_3C90X.IOAddr, cmdStallCtl, 3 /* Unstall download */);
+		
+	oneshot_start_ms(10);
+	while((inl(INF_3C90X.IOAddr + regDnListPtr_l) != 0) && oneshot_running())
+		;
+	if (!oneshot_running())
+	{
+		outputf("3c90x: Download engine pointer timeout");
+		return;
+	}
 
+#if 0		
+	/** successful completion (sans "interrupt Requested" bit) **/
+	if ((status & 0xbf) == 0x80)
+		return;
 
+	outputf("3c90x: Status (%hhX)", status);
+	/** check error codes **/
+	if (status & 0x02)
+	{
+		outputf("3c90x: Tx Reclaim Error (%hhX)", status);
+		a3c90x_reset();
+	} else if (status & 0x04) {
+		outputf("3c90x: Tx Status Overflow (%hhX)", status);
+		for (i=0; i<32; i++)
+			_outb(0x00, INF_3C90X.IOAddr + regTxStatus_b);
+		/** must re-enable after max collisions before re-issuing tx **/
+		_issue_command(INF_3C90X.IOAddr, cmdTxEnable, 0);
+	} else if (status & 0x08) {
+		outputf("3c90x: Tx Max Collisions (%hhX)", status);
+		/** must re-enable after max collisions before re-issuing tx **/
+		_issue_command(INF_3C90X.IOAddr, cmdTxEnable, 0);
+	} else if (status & 0x10) {
+		outputf("3c90x: Tx Underrun (%hhX)", status);
+		a3c90x_reset();
+	} else if (status & 0x20) {
+		outputf("3c90x: Tx Jabber (%hhX)", status);
+		a3c90x_reset();
+	} else if ((status & 0x80) != 0x80) {
+		outputf("3c90x: Internal Error - Incomplete Transmission (%hhX)", status);
+		a3c90x_reset();
+	}
+#endif
+}
+
+/* _setup_recv allocates and sets a pbuf from lwIP as the active receive
+ * packet chain for the 3c90x.  The 3c90x must not be trying to receive
+ * when _setup_recv is being called.
+ */
+static void _setup_recv(struct nic *nic)
+{
+	struct pbuf *p, *q;
+	int i;
+	
+	rxdesc.status = 0;	/* Clear it out in the very beginning. */
+	
+	p = pbuf_alloc(PBUF_RAW, 1536 /* XXX magic Max len */, PBUF_POOL);
+	if (!p)
+	{
+		outputf("3c90x: out of memory for packet?");
+		currecv = p;
+		return;
+	}
+	
+	rxdesc.next = 0;
+	rxdesc.status = 0;
+	for (i = 0, q = p; q; q = q->next, i++)
+	{
+		rxdesc.segments[i].addr = v2p(q->payload);
+		rxdesc.segments[i].len = q->len | (q->next ? 0 : (1 << 31));
+	}
+	
+	outl(INF_3C90X.IOAddr + regUpListPtr_l, v2p(&rxdesc));
+	
+	currecv = p;
+}
 
 /*** a3c90x_poll: exported routine that waits for a certain length of time
  *** for a packet, and if it sees none, returns 0.  This routine should
  *** copy the packet to nic->packet if it gets a packet and set the size
  *** in nic->packetlen.  Return 1 if a packet was found.
  ***/
-static int
-a3c90x_poll(struct nic *nic, int retrieve)
-    {
-    int i, errcode;
-
-    if (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w)&0x0010))
-	{
-	return 0;
-	}
-
-    if ( ! retrieve ) return 1;
-
-    /** we don't need to acknowledge rxComplete -- the upload engine
-     ** does it for us.
-     **/
-
-    /** Build the up-load descriptor **/
-    INF_3C90X.ReceiveUPD.UpNextPtr = 0;
-    INF_3C90X.ReceiveUPD.UpPktStatus = 0;
-    INF_3C90X.ReceiveUPD.DataAddr = virt_to_bus(nic->packet);
-    INF_3C90X.ReceiveUPD.DataLength = 1536 + (1<<31);
-
-    /** Submit the upload descriptor to the NIC **/
-    _outl(virt_to_bus(&(INF_3C90X.ReceiveUPD)),
-         INF_3C90X.IOAddr + regUpListPtr_l);
-
-    /** Wait for upload completion (upComplete(15) or upError (14)) **/
-    for(i=0;i<40000;i++);
-    while((INF_3C90X.ReceiveUPD.UpPktStatus & ((1<<14) | (1<<15))) == 0)
-	for(i=0;i<40000;i++);
-
-    /** Check for Error (else we have good packet) **/
-    if (INF_3C90X.ReceiveUPD.UpPktStatus & (1<<14))
+static struct pbuf * a3c90x_poll(struct nic *nic)
+{
+	int errcode;
+	struct pbuf *p;
+	
+	if (!currecv)
+		_setup_recv(nic);
+	
+	/* Nothing to do? */
+	if ((rxdesc.status & ((1<<14) | (1<<15))) == 0)
+		return NULL;
+	
+	p = currecv;
+	
+	/** Check for Error (else we have good packet) **/
+	if (rxdesc.status & (1<<14))
 	{
-	errcode = INF_3C90X.ReceiveUPD.UpPktStatus;
-	if (errcode & (1<<16))
-	    outputf("3C90X: Rx Overrun (%hX)",errcode>>16);
-	else if (errcode & (1<<17))
-	    outputf("3C90X: Runt Frame (%hX)",errcode>>16);
-	else if (errcode & (1<<18))
-	    outputf("3C90X: Alignment Error (%hX)",errcode>>16);
-	else if (errcode & (1<<19))
-	    outputf("3C90X: CRC Error (%hX)",errcode>>16);
-	else if (errcode & (1<<20))
-	    outputf("3C90X: Oversized Frame (%hX)",errcode>>16);
-	else
-	    outputf("3C90X: Packet error (%hX)",errcode>>16);
-	return 0;
+		errcode = rxdesc.status;
+		if (errcode & (1<<16))
+			outputf("3C90X: Rx Overrun (%hX)",errcode>>16);
+		else if (errcode & (1<<17))
+			outputf("3C90X: Runt Frame (%hX)",errcode>>16);
+		else if (errcode & (1<<18))
+			outputf("3C90X: Alignment Error (%hX)",errcode>>16);
+		else if (errcode & (1<<19))
+			outputf("3C90X: CRC Error (%hX)",errcode>>16);
+		else if (errcode & (1<<20))
+			outputf("3C90X: Oversized Frame (%hX)",errcode>>16);
+		else
+			outputf("3C90X: Packet error (%hX)",errcode>>16);
+		
+		pbuf_free(p);		/* Bounce the old one before setting it up again. */
+		_setup_recv(nic);
+		return NULL;
 	}
 
-    /** Ok, got packet.  Set length in nic->packetlen. **/
-    nic->packetlen = (INF_3C90X.ReceiveUPD.UpPktStatus & 0x1FFF);
-
-    return 1;
-    }
-
-
+	pbuf_realloc(p, rxdesc.status & 0x1FFF);	/* Resize the packet to how large it actually is. */
+	_setup_recv(nic);	/* ..and light the NIC up again. */
+	
+	return p;
+}
 
 /*** a3c90x_disable: exported routine to disable the card.  What's this for?
  *** the eepro100.c driver didn't have one, so I just left this one empty too.
@@ -833,45 +814,44 @@ static int a3c90x_probe(struct pci_dev * pci, void * data)
     linktype = 0x0008;
     if (mopt & 0x01)
 	{
-	outputf("%s100Base-T4",(c++)?", ":"");
+	outputf("  100Base-T4");
 	linktype = 0x0006;
 	}
     if (mopt & 0x04)
 	{
-	outputf("%s100Base-FX",(c++)?", ":"");
+	outputf("  100Base-FX");
 	linktype = 0x0005;
 	}
     if (mopt & 0x10)
 	{
-	outputf("%s10Base-2",(c++)?", ":"");
+	outputf("  10Base-2");
 	linktype = 0x0003;
 	}
     if (mopt & 0x20)
 	{
-	outputf("%sAUI",(c++)?", ":"");
+	outputf("  AUI");
 	linktype = 0x0001;
 	}
     if (mopt & 0x40)
 	{
-	outputf("%sMII",(c++)?", ":"");
+	outputf("  MII");
 	linktype = 0x0006;
 	}
     if ((mopt & 0xA) == 0xA)
 	{
-	outputf("%s10Base-T / 100Base-TX",(c++)?", ":"");
+	outputf("  10Base-T / 100Base-TX");
 	linktype = 0x0008;
 	}
     else if ((mopt & 0xA) == 0x2)
 	{
-	outputf("%s100Base-TX",(c++)?", ":"");
+	outputf("  100Base-TX");
 	linktype = 0x0008;
 	}
     else if ((mopt & 0xA) == 0x8)
 	{
-	outputf("%s10Base-T",(c++)?", ":"");
+	outputf("  10Base-T");
 	linktype = 0x0008;
 	}
-    outputf(".");
 
     /** Determine transceiver type to use, depending on value stored in
      ** eeprom 0x16
@@ -933,7 +913,9 @@ static int a3c90x_probe(struct pci_dev * pci, void * data)
     /** Set the RX filter = receive only individual pkts & multicast & bcast. **/
     _issue_command(INF_3C90X.IOAddr, cmdSetRxFilter, 0x01 + 0x02 + 0x04);
     _issue_command(INF_3C90X.IOAddr, cmdRxEnable, 0);
-
+    
+    /* Now stick a packet in the queue. */
+    _setup_recv(&nic);
 
     /**
      ** set Indication and Interrupt flags , acknowledge any IRQ's
@@ -943,8 +925,9 @@ static int a3c90x_probe(struct pci_dev * pci, void * data)
     _issue_command(INF_3C90X.IOAddr, cmdAcknowledgeInterrupt, 0x661);
 
     /* * Set our exported functions **/
-    nic.poll     = a3c90x_poll;
+    nic.recv     = a3c90x_poll;
     nic.transmit = a3c90x_transmit;
+    memcpy(nic.hwaddr, INF_3C90X.HWAddr, 6);
     eth_register(&nic);
 
     return 1;