/* ibmtr.c: A shared-memory IBM Token Ring 16/4 driver for linux * * Written 1993 by Mark Swanson and Peter De Schrijver. * This software may be used and distributed according to the terms * of the GNU Public License, incorporated herein by reference. * * This device driver should work with Any IBM Token Ring Card that does * not use DMA. * * I used Donald Becker's (becker@cesdis.gsfc.nasa.gov) device driver work * as a base for most of my initial work. * * Changes by Peter De Schrijver (Peter.Deschrijver@linux.cc.kuleuven.ac.be) : * * + changed name to ibmtr.c in anticipation of other tr boards. * + changed reset code and adapter open code. * + added SAP open code. * + a first attempt to write interrupt, transmit and receive routines. * * Changes by David W. Morris (dwm@shell.portal.com) : * 941003 dwm: - Restructure tok_probe for multiple adapters, devices. * + Add comments, misc reorg for clarity. * + Flatten interrupt handler levels. * * Changes by Farzad Farid (farzy@zen.via.ecp.fr) * and Pascal Andre (andre@chimay.via.ecp.fr) (March 9 1995) : * + multi ring support clean up. * + RFC1042 compliance enhanced. * * Changes by Pascal Andre (andre@chimay.via.ecp.fr) (September 7 1995) : * + bug correction in tr_tx * + removed redundant information display * + some code reworking * * Changes by Michel Lespinasse (walken@via.ecp.fr), * Yann Doussot (doussot@via.ecp.fr) and Pascal Andre (andre@via.ecp.fr) * (February 18, 1996) : * + modified shared memory and mmio access port the driver to * alpha platform (structure access -> readb/writeb) * * Changes by Steve Kipisz (bungy@ibm.net or kipisz@vnet.ibm.com) * (January 18 1996): * + swapped WWOR and WWCR in ibmtr.h * + moved some init code from tok_probe into trdev_init. The * PCMCIA code can call trdev_init to complete initializing * the driver. * + added -DPCMCIA to support PCMCIA * + detecting PCMCIA Card Removal in interrupt handler. If * ISRP is FF, then a PCMCIA card has been removed * * Changes by Paul Norton (pnorton@cts.com) : * + restructured the READ.LOG logic to prevent the transmit SRB * from being rudely overwritten before the transmit cycle is * complete. (August 15 1996) * + completed multiple adapter support. (November 20 1996) * + implemented csum_partial_copy in tr_rx and increased receive * buffer size and count. Minor fixes. (March 15, 1997) * * Changes by Christopher Turcksin * + Now compiles ok as a module again. * * Changes by Paul Norton (pnorton@ieee.org) : * + moved the header manipulation code in tr_tx and tr_rx to * net/802/tr.c. (July 12 1997) * + add retry and timeout on open if cable disconnected. (May 5 1998) * + lifted 2000 byte mtu limit. now depends on shared-RAM size. * May 25 1998) * + can't allocate 2k recv buff at 8k shared-RAM. (20 October 1998) * * Changes by Joel Sloan (jjs@c-me.com) : * + disable verbose debug messages by default - to enable verbose * debugging, edit the IBMTR_DEBUG_MESSAGES define below * * Changes by Mike Phillips : * + Added extra #ifdef's to work with new PCMCIA Token Ring Code. * The PCMCIA code now just sets up the card so it can be recognized * by ibmtr_probe. Also checks allocated memory vs. on-board memory * for correct figure to use. * * Changes by Tim Hockin (thockin@isunix.it.ilstu.edu) : * + added spinlocks for SMP sanity (10 March 1999) */ /* change the define of IBMTR_DEBUG_MESSAGES to a nonzero value in the event that chatty debug messages are desired - jjs 12/30/98 */ #define IBMTR_DEBUG_MESSAGES 0 #ifdef PCMCIA #define MODULE #endif #include #ifdef PCMCIA #undef MODULE #endif #define NO_AUTODETECT 1 #undef NO_AUTODETECT #undef ENABLE_PAGING #define FALSE 0 #define TRUE (!FALSE) /* changes the output format of driver initialisation */ #define TR_NEWFORMAT 1 #define TR_VERBOSE 0 /* some 95 OS send many non UI frame; this allow removing the warning */ #define TR_FILTERNONUI 1 /* version and credits */ static char *version = "ibmtr.c: v1.3.57 8/ 7/94 Peter De Schrijver and Mark Swanson\n" " v2.1.125 10/20/98 Paul Norton \n" " v2.2.0 12/30/98 Joel Sloan \n"; static char pcchannelid[] = { 0x05, 0x00, 0x04, 0x09, 0x04, 0x03, 0x04, 0x0f, 0x03, 0x06, 0x03, 0x01, 0x03, 0x01, 0x03, 0x00, 0x03, 0x09, 0x03, 0x09, 0x03, 0x00, 0x02, 0x00 }; static char mcchannelid[] = { 0x04, 0x0d, 0x04, 0x01, 0x05, 0x02, 0x05, 0x03, 0x03, 0x06, 0x03, 0x03, 0x05, 0x08, 0x03, 0x04, 0x03, 0x05, 0x03, 0x01, 0x03, 0x08, 0x02, 0x00 }; #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ibmtr.h" #define DPRINTK(format, args...) printk("%s: " format, dev->name , ## args) #define DPRINTD(format, args...) DummyCall("%s: " format, dev->name , ## args) #define MIN(X, Y) ((X) < (Y) ? (X) : (Y)) #define MAX(X, Y) ((X) > (Y) ? (X) : (Y)) #if TR_NEWFORMAT /* this allows displaying full adapter information */ const char *channel_def[] __initdata = { "ISA", "MCA", "ISA P&P" }; __initfunc(char *adapter_def(char type)) { switch (type) { case 0xF : return "PC Adapter | PC Adapter II | Adapter/A"; case 0xE : return "16/4 Adapter | 16/4 Adapter/A (long)"; case 0xD : return "16/4 Adapter/A (short) | 16/4 ISA-16 Adapter"; case 0xC : return "Auto 16/4 Adapter"; default : return "adapter (unknown type)"; }; }; #endif #if !TR_NEWFORMAT unsigned char ibmtr_debug_trace=1; /* Patch or otherwise alter to control tokenring tracing. */ #else unsigned char ibmtr_debug_trace=0; #endif #define TRC_INIT 0x01 /* Trace initialization & PROBEs */ #define TRC_INITV 0x02 /* verbose init trace points */ int ibmtr_probe(struct device *dev); static int ibmtr_probe1(struct device *dev, int ioaddr); static unsigned char get_sram_size(struct tok_info *adapt_info); #ifdef PCMCIA extern unsigned char pcmcia_reality_check(unsigned char gss); #endif static int tok_init_card(struct device *dev); void tok_interrupt(int irq, void *dev_id, struct pt_regs *regs); static int trdev_init(struct device *dev); static void initial_tok_int(struct device *dev); static void open_sap(unsigned char type,struct device *dev); void tok_open_adapter(unsigned long dev_addr); static void tr_rx(struct device *dev); static void tr_tx(struct device *dev); static int tok_open(struct device *dev); static int tok_close(struct device *dev); static int tok_send_packet(struct sk_buff *skb, struct device *dev); static struct net_device_stats * tok_get_stats(struct device *dev); void ibmtr_readlog(struct device *dev); void ibmtr_reset_timer(struct timer_list *tmr, struct device *dev); int ibmtr_change_mtu(struct device *dev, int mtu); static unsigned int ibmtr_portlist[] __initdata = { 0xa20, 0xa24, 0 }; static __u32 ibmtr_mem_base = 0xd0000; __initfunc(static void PrtChanID(char *pcid, short stride) ) { short i, j; for (i=0, j=0; i<24; i++, j+=stride) printk("%1x", ((int) pcid[j]) & 0x0f); printk("\n"); } __initfunc(static void HWPrtChanID (__u32 pcid, short stride)) { short i, j; for (i=0, j=0; i<24; i++, j+=stride) printk("%1x", ((int)readb(pcid + j)) & 0x0f); printk("\n"); } /* * ibmtr_probe(): Routine specified in the network device structure * to probe for an IBM Token Ring Adapter. Routine outline: * I. Interrogate hardware to determine if an adapter exists * and what the speeds and feeds are * II. Setup data structures to control execution based upon * adapter characteristics. * III. Initialize adapter operation * * We expect ibmtr_probe to be called once for each device entry * which references it. */ __initfunc(int ibmtr_probe(struct device *dev)) { int i; int base_addr = dev ? dev->base_addr : 0; if (base_addr > 0x1ff) { /* * Check a single specified location. */ if (ibmtr_probe1(dev, base_addr)) { #ifndef MODULE #ifndef PCMCIA tr_freedev(dev); #endif #endif return -ENODEV; } else return 0; } else if (base_addr != 0) /* Don't probe at all. */ return -ENXIO; for (i = 0; ibmtr_portlist[i]; i++) { int ioaddr = ibmtr_portlist[i]; if (check_region(ioaddr, IBMTR_IO_EXTENT)) continue; if (ibmtr_probe1(dev, ioaddr)) { #ifndef MODULE #ifndef PCMCIA tr_freedev(dev); #endif #endif } else return 0; } return -ENODEV; } __initfunc(static int ibmtr_probe1(struct device *dev, int PIOaddr)) { unsigned char segment=0, intr=0, irq=0, i=0, j=0, cardpresent=NOTOK,temp=0; __u32 t_mmio=0; struct tok_info *ti=0; __u32 cd_chanid; unsigned char *tchanid, ctemp; unsigned long timeout; #ifndef MODULE #ifndef PCMCIA dev = init_trdev(dev,0); #endif #endif /* Query the adapter PIO base port which will return * indication of where MMIO was placed. We also have a * coded interrupt number. */ segment = inb(PIOaddr); /* * Out of range values so we'll assume non-existent IO device */ if (segment < 0x40 || segment > 0xe0) return -ENODEV; /* * Compute the linear base address of the MMIO area * as LINUX doesn't care about segments */ t_mmio=(((__u32)(segment & 0xfc) << 11) + 0x80000); intr = segment & 0x03; /* low bits is coded interrupt # */ if (ibmtr_debug_trace & TRC_INIT) DPRINTK("PIOaddr: %4hx seg/intr: %2x mmio base: %08X intr: %d\n", PIOaddr, (int)segment, t_mmio, (int)intr); /* * Now we will compare expected 'channelid' strings with * what we is there to learn of ISA/MCA or not TR card */ cd_chanid = (CHANNEL_ID + t_mmio); /* for efficiency */ tchanid=pcchannelid; cardpresent=TR_ISA; /* try ISA */ /* * Suboptimize knowing first byte different */ ctemp = readb(cd_chanid) & 0x0f; if (ctemp != *tchanid) { /* NOT ISA card, try MCA */ tchanid=mcchannelid; cardpresent=TR_MCA; if (ctemp != *tchanid) /* Neither ISA nor MCA */ cardpresent=NOTOK; } if (cardpresent != NOTOK) { /* * Know presumed type, try rest of ID */ for (i=2,j=1; i<=46; i=i+2,j++) { if ((readb(cd_chanid+i) & 0x0f) != tchanid[j]) { cardpresent=NOTOK; /* match failed, not TR card */ break; } } } /* * If we have an ISA board check for the ISA P&P version, * as it has different IRQ settings */ if (cardpresent == TR_ISA && (readb(AIPFID + t_mmio)==0x0e)) cardpresent=TR_ISAPNP; if (cardpresent == NOTOK) { /* "channel_id" did not match, report */ if (ibmtr_debug_trace & TRC_INIT) { DPRINTK("Channel ID string not found for PIOaddr: %4hx\n", PIOaddr); DPRINTK("Expected for ISA: "); PrtChanID(pcchannelid,1); DPRINTK(" found: "); HWPrtChanID(cd_chanid,2); DPRINTK("Expected for MCA: "); PrtChanID(mcchannelid,1); } return -ENODEV; } /* Now, allocate some of the pl0 buffers for this driver.. */ /* If called from PCMCIA, ti is already set up, so no need to waste the memory, just use the existing structure */ #ifndef PCMCIA ti = (struct tok_info *)kmalloc(sizeof(struct tok_info), GFP_KERNEL); if (ti == NULL) return -ENOMEM; memset(ti, 0, sizeof(struct tok_info)); #else ti = dev->priv ; #endif ti->mmio= t_mmio; ti->readlog_pending = 0; init_waitqueue_head(&ti->wait_for_tok_int); init_waitqueue_head(&ti->wait_for_reset); dev->priv = ti; /* this seems like the logical use of the field ... let's try some empirical tests using the token-info structure -- that should fit with out future hope of multiple adapter support as well /dwm */ /* if PCMCIA, then the card is recognized as TR_ISAPNP * and there is no need to set up the interrupt, it is already done. */ #ifndef PCMCIA switch (cardpresent) { case TR_ISA: if (intr==0) irq=9; /* irq2 really is irq9 */ if (intr==1) irq=3; if (intr==2) irq=6; if (intr==3) irq=7; ti->global_int_enable=GLOBAL_INT_ENABLE+((irq==9) ? 2 : irq); ti->adapter_int_enable=PIOaddr+ADAPTINTREL; ti->sram=0; #if !TR_NEWFORMAT DPRINTK("ti->global_int_enable: %04X\n",ti->global_int_enable); #endif break; case TR_MCA: if (intr==0) irq=9; if (intr==1) irq=3; if (intr==2) irq=10; if (intr==3) irq=11; ti->global_int_enable=0; ti->adapter_int_enable=0; ti->sram=((__u32)(inb(PIOaddr+ADAPTRESETREL) & 0xfe) << 12); break; case TR_ISAPNP: if (intr==0) irq=9; if (intr==1) irq=3; if (intr==2) irq=10; if (intr==3) irq=11; timeout = jiffies + TR_SPIN_INTERVAL; while(!readb(ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN)) if (time_after(jiffies, timeout)) { DPRINTK("Hardware timeout during initialization.\n"); kfree_s(ti, sizeof(struct tok_info)); return -ENODEV; } ti->sram=((__u32)readb(ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN)<<12); ti->global_int_enable=PIOaddr+ADAPTINTREL; ti->adapter_int_enable=PIOaddr+ADAPTINTREL; break; } #endif if (ibmtr_debug_trace & TRC_INIT) { /* just report int */ DPRINTK("irq=%d",irq); if (ibmtr_debug_trace & TRC_INITV) { /* full chat in verbose only */ DPRINTK(", ti->mmio=%08X",ti->mmio); printk(", segment=%02X",segment); } printk(".\n"); } /* Get hw address of token ring card */ #if !TR_NEWFORMAT DPRINTK("hw address: "); #endif j=0; for (i=0; i<0x18; i=i+2) { /* technical reference states to do this */ temp = readb(ti->mmio + AIP + i) & 0x0f; #if !TR_NEWFORMAT printk("%1X",ti->hw_address[j]=temp); #else ti->hw_address[j]=temp; #endif if(j&1) dev->dev_addr[(j/2)]=ti->hw_address[j]+(ti->hw_address[j-1]<<4); ++j; } #ifndef TR_NEWFORMAT printk("\n"); #endif /* get Adapter type: 'F' = Adapter/A, 'E' = 16/4 Adapter II,...*/ ti->adapter_type = readb(ti->mmio + AIPADAPTYPE); /* get Data Rate: F=4Mb, E=16Mb, D=4Mb & 16Mb ?? */ ti->data_rate = readb(ti->mmio + AIPDATARATE); /* Get Early Token Release support?: F=no, E=4Mb, D=16Mb, C=4&16Mb */ ti->token_release = readb(ti->mmio + AIPEARLYTOKEN); /* How much shared RAM is on adapter ? */ #ifdef PCMCIA ti->avail_shared_ram = pcmcia_reality_check(get_sram_size(ti)); ibmtr_mem_base = ti->sram_base << 12 ; #else ti->avail_shared_ram = get_sram_size(ti); #endif /* We need to set or do a bunch of work here based on previous results.. */ /* Support paging? What sizes?: F=no, E=16k, D=32k, C=16 & 32k */ ti->shared_ram_paging = readb(ti->mmio + AIPSHRAMPAGE); /* Available DHB 4Mb size: F=2048, E=4096, D=4464 */ switch (readb(ti->mmio + AIP4MBDHB)) { case 0xe : ti->dhb_size4mb = 4096; break; case 0xd : ti->dhb_size4mb = 4464; break; default : ti->dhb_size4mb = 2048; break; } /* Available DHB 16Mb size: F=2048, E=4096, D=8192, C=16384, B=17960 */ switch (readb(ti->mmio + AIP16MBDHB)) { case 0xe : ti->dhb_size16mb = 4096; break; case 0xd : ti->dhb_size16mb = 8192; break; case 0xc : ti->dhb_size16mb = 16384; break; case 0xb : ti->dhb_size16mb = 17960; break; default : ti->dhb_size16mb = 2048; break; } #if !TR_NEWFORMAT DPRINTK("atype=%x, drate=%x, trel=%x, asram=%dK, srp=%x, " "dhb(4mb=%x, 16mb=%x)\n",ti->adapter_type, ti->data_rate, ti->token_release, ti->avail_shared_ram/2, ti->shared_ram_paging, ti->dhb_size4mb, ti->dhb_size16mb); #endif /* We must figure out how much shared memory space this adapter * will occupy so that if there are two adapters we can fit both * in. Given a choice, we will limit this adapter to 32K. The * maximum space will will use for two adapters is 64K so if the * adapter we are working on demands 64K (it also doesn't support * paging), then only one adapter can be supported. */ /* * determine how much of total RAM is mapped into PC space */ ti->mapped_ram_size=1<<((((readb(ti->mmio+ ACA_OFFSET + ACA_RW + RRR_ODD)) >>2) & 0x03) + 4); ti->page_mask=0; if (ti->shared_ram_paging == 0xf) { /* No paging in adapter */ ti->mapped_ram_size = ti->avail_shared_ram; } else { #ifdef ENABLE_PAGING unsigned char pg_size; #endif #if !TR_NEWFORMAT DPRINTK("shared ram page size: %dK\n",ti->mapped_ram_size/2); #endif #ifdef ENABLE_PAGING switch(ti->shared_ram_paging) { case 0xf: break; case 0xe: ti->page_mask=(ti->mapped_ram_size==32) ? 0xc0 : 0; pg_size=32; /* 16KB page size */ break; case 0xd: ti->page_mask=(ti->mapped_ram_size==64) ? 0x80 : 0; pg_size=64; /* 32KB page size */ break; case 0xc: ti->page_mask=(ti->mapped_ram_size==32) ? 0xc0 : 0; ti->page_mask=(ti->mapped_ram_size==64) ? 0x80 : 0; DPRINTK("Dual size shared RAM page (code=0xC), don't support it!\n"); /* nb/dwm: I did this because RRR (3,2) bits are documented as R/O and I can't find how to select which page size Also, the above conditional statement sequence is invalid as page_mask will always be set by the second stmt */ kfree_s(ti, sizeof(struct tok_info)); return -ENODEV; break; default: DPRINTK("Unknown shared ram paging info %01X\n",ti->shared_ram_paging); kfree_s(ti, sizeof(struct tok_info)); return -ENODEV; break; } if (ti->page_mask) { if (pg_size > ti->mapped_ram_size) { DPRINTK("Page size (%d) > mapped ram window (%d), can't page.\n", pg_size, ti->mapped_ram_size); ti->page_mask = 0; /* reset paging */ } else { ti->mapped_ram_size=ti->avail_shared_ram; DPRINTK("Shared RAM paging enabled. Page size : %uK\n", ((ti->page_mask^ 0xff)+1)>>2); } #endif } /* finish figuring the shared RAM address */ if (cardpresent==TR_ISA) { static __u32 ram_bndry_mask[]={0xffffe000, 0xffffc000, 0xffff8000, 0xffff0000}; __u32 new_base, rrr_32, chk_base, rbm; rrr_32 = ((readb(ti->mmio+ ACA_OFFSET + ACA_RW + RRR_ODD))>>2) & 0x00000003; rbm = ram_bndry_mask[rrr_32]; new_base = (ibmtr_mem_base + (~rbm)) & rbm; /* up to boundary */ chk_base = new_base + (ti->mapped_ram_size<<9); if (chk_base > (ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE)) { DPRINTK("Shared RAM for this adapter (%05x) exceeds driver" " limit (%05x), adapter not started.\n", chk_base, ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE); kfree_s(ti, sizeof(struct tok_info)); return -ENODEV; } else { /* seems cool, record what we have figured out */ ti->sram_base = new_base >> 12; ibmtr_mem_base = chk_base; } } #if !TR_NEWFORMAT DPRINTK("Using %dK shared RAM\n",ti->mapped_ram_size/2); #endif /* The PCMCIA has already got the interrupt line and the io port, so no chance of anybody else getting it - MLP */ #ifndef PCMCIA if (request_irq (dev->irq = irq, &tok_interrupt,0,"ibmtr", dev) != 0) { DPRINTK("Could not grab irq %d. Halting Token Ring driver.\n",irq); kfree_s(ti, sizeof(struct tok_info)); return -ENODEV; } /*?? Now, allocate some of the PIO PORTs for this driver.. */ request_region(PIOaddr,IBMTR_IO_EXTENT,"ibmtr"); /* record PIOaddr range as busy */ #endif #if !TR_NEWFORMAT DPRINTK("%s",version); /* As we have passed card identification, let the world know we're here! */ #else if (version) { printk("%s",version); version = NULL; } DPRINTK("%s %s found\n", channel_def[cardpresent-1], adapter_def(ti->adapter_type)); DPRINTK("using irq %d, PIOaddr %hx, %dK shared RAM.\n", irq, PIOaddr, ti->mapped_ram_size/2); DPRINTK("Hardware address : %02X:%02X:%02X:%02X:%02X:%02X\n", dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2], dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]); #endif /* Calculate the maximum DHB we can use */ switch (ti->mapped_ram_size) { case 16 : /* 8KB shared RAM */ ti->dhb_size4mb = MIN(ti->dhb_size4mb, 2048); ti->rbuf_len4 = 1032; ti->rbuf_cnt4 = 2; ti->dhb_size16mb = MIN(ti->dhb_size16mb, 2048); ti->rbuf_len16 = 1032; ti->rbuf_cnt16 = 2; break; case 32 : /* 16KB shared RAM */ ti->dhb_size4mb = MIN(ti->dhb_size4mb, 4464); ti->rbuf_len4 = 520; ti->rbuf_cnt4 = 9; ti->dhb_size16mb = MIN(ti->dhb_size16mb, 4096); ti->rbuf_len16 = 1032; /* 1024 usable */ ti->rbuf_cnt16 = 4; break; case 64 : /* 32KB shared RAM */ ti->dhb_size4mb = MIN(ti->dhb_size4mb, 4464); ti->rbuf_len4 = 1032; ti->rbuf_cnt4 = 6; ti->dhb_size16mb = MIN(ti->dhb_size16mb, 10240); ti->rbuf_len16 = 1032; ti->rbuf_cnt16 = 10; break; case 127 : /* 63KB shared RAM */ ti->dhb_size4mb = MIN(ti->dhb_size4mb, 4464); ti->rbuf_len4 = 1032; ti->rbuf_cnt4 = 6; ti->dhb_size16mb = MIN(ti->dhb_size16mb, 16384); ti->rbuf_len16 = 1032; ti->rbuf_cnt16 = 16; break; case 128 : /* 64KB shared RAM */ ti->dhb_size4mb = MIN(ti->dhb_size4mb, 4464); ti->rbuf_len4 = 1032; ti->rbuf_cnt4 = 6; ti->dhb_size16mb = MIN(ti->dhb_size16mb, 17960); ti->rbuf_len16 = 1032; ti->rbuf_cnt16 = 18; break; default : ti->dhb_size4mb = 2048; ti->rbuf_len4 = 1032; ti->rbuf_cnt4 = 2; ti->dhb_size16mb = 2048; ti->rbuf_len16 = 1032; ti->rbuf_cnt16 = 2; break; } ti->maxmtu16 = (ti->rbuf_len16*ti->rbuf_cnt16)-((ti->rbuf_cnt16)<<3)-TR_HLEN; ti->maxmtu4 = (ti->rbuf_len4*ti->rbuf_cnt4)-((ti->rbuf_cnt4)<<3)-TR_HLEN; DPRINTK("Maximum MTU 16Mbps: %d, 4Mbps: %d\n", ti->maxmtu16, ti->maxmtu4); dev->base_addr=PIOaddr; /* set the value for device */ trdev_init(dev); tok_init_card(dev); return 0; /* Return 0 to indicate we have found a Token Ring card. */ } /* query the adapter for the size of shared RAM */ __initfunc(static unsigned char get_sram_size(struct tok_info *adapt_info)) { unsigned char avail_sram_code; static unsigned char size_code[]={ 0,16,32,64,127,128 }; /* Adapter gives 'F' -- use RRR bits 3,2 'E' -- 8kb 'D' -- 16kb 'C' -- 32kb 'A' -- 64KB 'B' - 64KB less 512 bytes at top (WARNING ... must zero top bytes in INIT */ avail_sram_code=0xf-readb(adapt_info->mmio + AIPAVAILSHRAM); if (avail_sram_code) return size_code[avail_sram_code]; else /* for code 'F', must compute size from RRR(3,2) bits */ return 1<<((readb(adapt_info->mmio+ ACA_OFFSET + ACA_RW + RRR_ODD)>>2)+4); } __initfunc(static int trdev_init(struct device *dev)) { struct tok_info *ti=(struct tok_info *)dev->priv; ti->open_status = CLOSED; dev->init = tok_init_card; dev->open = tok_open; dev->stop = tok_close; dev->hard_start_xmit = tok_send_packet; dev->get_stats = tok_get_stats; dev->set_multicast_list = NULL; dev->change_mtu = ibmtr_change_mtu; #ifndef MODULE #ifndef PCMCIA tr_setup(dev); #endif #endif return 0; } static int tok_open(struct device *dev) { struct tok_info *ti=(struct tok_info *)dev->priv; /* init the spinlock */ ti->lock = (spinlock_t) SPIN_LOCK_UNLOCKED; if (ti->open_status==CLOSED) tok_init_card(dev); if (ti->open_status==IN_PROGRESS) sleep_on(&ti->wait_for_reset); if (ti->open_status==SUCCESS) { dev->tbusy=0; dev->interrupt=0; dev->start=1; /* NEED to see smem size *AND* reset high 512 bytes if needed */ MOD_INC_USE_COUNT; return 0; } else return -EAGAIN; } static int tok_close(struct device *dev) { struct tok_info *ti=(struct tok_info *) dev->priv; writeb(DIR_CLOSE_ADAPTER, ti->srb + offsetof(struct srb_close_adapter, command)); writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); ti->open_status=CLOSED; sleep_on(&ti->wait_for_tok_int); if (readb(ti->srb + offsetof(struct srb_close_adapter, ret_code))) DPRINTK("close adapter failed: %02X\n", (int)readb(ti->srb + offsetof(struct srb_close_adapter, ret_code))); dev->start = 0; #ifdef PCMCIA ti->sram = 0 ; #endif DPRINTK("Adapter closed.\n"); MOD_DEC_USE_COUNT; return 0; } void tok_interrupt (int irq, void *dev_id, struct pt_regs *regs) { unsigned char status; struct tok_info *ti; struct device *dev; dev = dev_id; #if TR_VERBOSE DPRINTK("Int from tok_driver, dev : %p\n",dev); #endif ti = (struct tok_info *) dev->priv; spin_lock(&(ti->lock)); /* Disable interrupts till processing is finished */ dev->interrupt=1; writeb((~INT_ENABLE), ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN); /* Reset interrupt for ISA boards */ if (ti->adapter_int_enable) outb(0,ti->adapter_int_enable); else outb(0,ti->global_int_enable); switch (ti->do_tok_int) { case NOT_FIRST: /* Begin the regular interrupt handler HERE inline to avoid the extra levels of logic and call depth for the original solution. */ status=readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_ODD); #ifdef PCMCIA /* Check if the PCMCIA card was pulled. */ if (status == 0xFF) { DPRINTK("PCMCIA card removed.\n"); spin_unlock(&(ti->lock)); dev->interrupt = 0; return; } /* Check ISRP EVEN too. */ if ( readb (ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN) == 0xFF) { DPRINTK("PCMCIA card removed.\n"); spin_unlock(&(ti->lock)); dev->interrupt = 0; return; } #endif if (status & ADAP_CHK_INT) { int i; __u32 check_reason; check_reason=ti->mmio + ntohs(readw(ti->sram + ACA_OFFSET + ACA_RW +WWCR_EVEN)); DPRINTK("Adapter check interrupt\n"); DPRINTK("8 reason bytes follow: "); for(i=0; i<8; i++, check_reason++) printk("%02X ", (int)readb(check_reason)); printk("\n"); writeb((~ADAP_CHK_INT), ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD); writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN); dev->interrupt=0; } else if (readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN) & (TCR_INT | ERR_INT | ACCESS_INT)) { DPRINTK("adapter error: ISRP_EVEN : %02x\n", (int)readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN)); writeb(~(TCR_INT | ERR_INT | ACCESS_INT), ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN); writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN); dev->interrupt=0; } else if (status & (SRB_RESP_INT | ASB_FREE_INT | ARB_CMD_INT | SSB_RESP_INT)) { /* SRB, ASB, ARB or SSB response */ if (status & SRB_RESP_INT) { /* SRB response */ switch(readb(ti->srb)) { /* SRB command check */ case XMIT_DIR_FRAME: { unsigned char xmit_ret_code; xmit_ret_code=readb(ti->srb + offsetof(struct srb_xmit, ret_code)); if (xmit_ret_code != 0xff) { DPRINTK("error on xmit_dir_frame request: %02X\n", xmit_ret_code); if (ti->current_skb) { dev_kfree_skb(ti->current_skb); ti->current_skb=NULL; } dev->tbusy=0; if (ti->readlog_pending) ibmtr_readlog(dev); } } break; case XMIT_UI_FRAME: { unsigned char xmit_ret_code; xmit_ret_code=readb(ti->srb + offsetof(struct srb_xmit, ret_code)); if (xmit_ret_code != 0xff) { DPRINTK("error on xmit_ui_frame request: %02X\n", xmit_ret_code); if (ti->current_skb) { dev_kfree_skb(ti->current_skb); ti->current_skb=NULL; } dev->tbusy=0; if (ti->readlog_pending) ibmtr_readlog(dev); } } break; case DIR_OPEN_ADAPTER: { unsigned char open_ret_code; __u16 open_error_code; ti->srb=ti->sram+ntohs(readw(ti->init_srb +offsetof(struct srb_open_response, srb_addr))); ti->ssb=ti->sram+ntohs(readw(ti->init_srb +offsetof(struct srb_open_response, ssb_addr))); ti->arb=ti->sram+ntohs(readw(ti->init_srb +offsetof(struct srb_open_response, arb_addr))); ti->asb=ti->sram+ntohs(readw(ti->init_srb +offsetof(struct srb_open_response, asb_addr))); ti->current_skb=NULL; open_ret_code = readb(ti->init_srb +offsetof(struct srb_open_response, ret_code)); open_error_code = ntohs(readw(ti->init_srb +offsetof(struct srb_open_response, error_code))); if (open_ret_code==7) { if (!ti->auto_ringspeedsave && (open_error_code==0x24)) { DPRINTK("Open failed: Adapter speed must match ring " "speed if Automatic Ring Speed Save is disabled.\n"); ti->open_status=FAILURE; wake_up(&ti->wait_for_reset); } else if (open_error_code==0x24) DPRINTK("Retrying open to adjust to ring speed.\n"); else if ((open_error_code==0x2d) && ti->auto_ringspeedsave) DPRINTK("No signal detected for Auto Speed Detection.\n"); else if (open_error_code==0x11) { if (ti->retry_count--) DPRINTK("Ring broken/disconnected, retrying...\n"); else { DPRINTK("Ring broken/disconnected, open failed.\n"); ti->open_status = FAILURE; } } else DPRINTK("Unrecoverable error: error code = %04x.\n", open_error_code); } else if (!open_ret_code) { #if !TR_NEWFORMAT DPRINTK("board opened...\n"); #else DPRINTK("Adapter initialized and opened.\n"); #endif writeb(~(SRB_RESP_INT), ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD); writeb(~(CMD_IN_SRB), ti->mmio + ACA_OFFSET + ACA_RESET + ISRA_ODD); open_sap(EXTENDED_SAP,dev); /* YdW probably hates me */ goto skip_reset; } else DPRINTK("open failed: ret_code = %02X, retrying\n", open_ret_code); if (ti->open_status != FAILURE) { ibmtr_reset_timer(&(ti->tr_timer), dev); } } break; case DIR_CLOSE_ADAPTER: wake_up(&ti->wait_for_tok_int); break; case DLC_OPEN_SAP: if (readb(ti->srb+offsetof(struct dlc_open_sap, ret_code))) { DPRINTK("open_sap failed: ret_code = %02X,retrying\n", (int)readb(ti->srb+offsetof(struct dlc_open_sap, ret_code))); ibmtr_reset_timer(&(ti->tr_timer), dev); } else { ti->exsap_station_id= readw(ti->srb+offsetof(struct dlc_open_sap, station_id)); ti->open_status=SUCCESS; /* TR adapter is now available */ wake_up(&ti->wait_for_reset); } break; case DIR_INTERRUPT: case DIR_MOD_OPEN_PARAMS: case DIR_SET_GRP_ADDR: case DIR_SET_FUNC_ADDR: case DLC_CLOSE_SAP: if (readb(ti->srb+offsetof(struct srb_interrupt, ret_code))) DPRINTK("error on %02X: %02X\n", (int)readb(ti->srb+offsetof(struct srb_interrupt, command)), (int)readb(ti->srb+offsetof(struct srb_interrupt, ret_code))); break; case DIR_READ_LOG: if (readb(ti->srb+offsetof(struct srb_read_log, ret_code))) DPRINTK("error on dir_read_log: %02X\n", (int)readb(ti->srb+offsetof(struct srb_read_log, ret_code))); else if (IBMTR_DEBUG_MESSAGES) { DPRINTK( "Line errors %02X, Internal errors %02X, Burst errors %02X\n" "A/C errors %02X, Abort delimiters %02X, Lost frames %02X\n" "Receive congestion count %02X, Frame copied errors %02X\n" "Frequency errors %02X, Token errors %02X\n", (int)readb(ti->srb+offsetof(struct srb_read_log, line_errors)), (int)readb(ti->srb+offsetof(struct srb_read_log, internal_errors)), (int)readb(ti->srb+offsetof(struct srb_read_log, burst_errors)), (int)readb(ti->srb+offsetof(struct srb_read_log, A_C_errors)), (int)readb(ti->srb+offsetof(struct srb_read_log, abort_delimiters)), (int)readb(ti->srb+offsetof(struct srb_read_log, lost_frames)), (int)readb(ti->srb+offsetof(struct srb_read_log, recv_congest_count)), (int)readb(ti->srb+offsetof(struct srb_read_log, frame_copied_errors)), (int)readb(ti->srb+offsetof(struct srb_read_log, frequency_errors)), (int)readb(ti->srb+offsetof(struct srb_read_log, token_errors))); } dev->tbusy=0; break; default: DPRINTK("Unknown command %02X encountered\n", (int)readb(ti->srb)); } /* SRB command check */ writeb(~CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_RESET + ISRA_ODD); writeb(~SRB_RESP_INT, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD); skip_reset: } /* SRB response */ if (status & ASB_FREE_INT) { /* ASB response */ switch(readb(ti->asb)) { /* ASB command check */ case REC_DATA: case XMIT_UI_FRAME: case XMIT_DIR_FRAME: break; default: DPRINTK("unknown command in asb %02X\n", (int)readb(ti->asb)); } /* ASB command check */ if (readb(ti->asb+2)!=0xff) /* checks ret_code */ DPRINTK("ASB error %02X in cmd %02X\n", (int)readb(ti->asb+2),(int)readb(ti->asb)); writeb(~ASB_FREE_INT, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD); } /* ASB response */ if (status & ARB_CMD_INT) { /* ARB response */ switch (readb(ti->arb)) { /* ARB command check */ case DLC_STATUS: DPRINTK("DLC_STATUS new status: %02X on station %02X\n", ntohs(readw(ti->arb + offsetof(struct arb_dlc_status, status))), ntohs(readw(ti->arb +offsetof(struct arb_dlc_status, station_id)))); break; case REC_DATA: tr_rx(dev); break; case RING_STAT_CHANGE: { unsigned short ring_status; ring_status=ntohs(readw(ti->arb +offsetof(struct arb_ring_stat_change, ring_status))); if (ring_status & (SIGNAL_LOSS | LOBE_FAULT)) { DPRINTK("Signal loss/Lobe fault\n"); DPRINTK("We try to reopen the adapter.\n"); ibmtr_reset_timer(&(ti->tr_timer), dev); } else if (ring_status & (HARD_ERROR | XMIT_BEACON | AUTO_REMOVAL | REMOVE_RECV | RING_RECOVER)) DPRINTK("New ring status: %02X\n", ring_status); if (ring_status & LOG_OVERFLOW) { if (dev->tbusy) ti->readlog_pending = 1; else ibmtr_readlog(dev); } } break; case XMIT_DATA_REQ: tr_tx(dev); break; default: DPRINTK("Unknown command %02X in arb\n", (int)readb(ti->arb)); break; } /* ARB command check */ writeb(~ARB_CMD_INT, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD); writeb(ARB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); } /* ARB response */ if (status & SSB_RESP_INT) { /* SSB response */ unsigned char retcode; switch (readb(ti->ssb)) { /* SSB command check */ case XMIT_DIR_FRAME: case XMIT_UI_FRAME: retcode = readb(ti->ssb+2); if (retcode && (retcode != 0x22)) /* checks ret_code */ DPRINTK("xmit ret_code: %02X xmit error code: %02X\n", (int)retcode, (int)readb(ti->ssb+6)); else ti->tr_stats.tx_packets++; break; case XMIT_XID_CMD: DPRINTK("xmit xid ret_code: %02X\n", (int)readb(ti->ssb+2)); default: DPRINTK("Unknown command %02X in ssb\n", (int)readb(ti->ssb)); } /* SSB command check */ writeb(~SSB_RESP_INT, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD); writeb(SSB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); } /* SSB response */ } /* SRB, ARB, ASB or SSB response */ dev->interrupt=0; writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN); break; case FIRST_INT: initial_tok_int(dev); break; default: DPRINTK("Unexpected interrupt from tr adapter\n"); } spin_unlock(&(ti->lock)); } static void initial_tok_int(struct device *dev) { __u32 encoded_addr; __u32 hw_encoded_addr; struct tok_info *ti; ti=(struct tok_info *) dev->priv; ti->do_tok_int=NOT_FIRST; #ifndef TR_NEWFORMAT DPRINTK("Initial tok int received\n"); #endif /* we assign the shared-ram address for ISA devices */ if(!ti->sram) { writeb(ti->sram_base, ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN); ti->sram=((__u32)ti->sram_base << 12); } ti->init_srb=ti->sram +ntohs((unsigned short)readw(ti->mmio+ ACA_OFFSET + WRBR_EVEN)); SET_PAGE(ntohs((unsigned short)readw(ti->mmio+ACA_OFFSET + WRBR_EVEN))); dev->mem_start = ti->sram; dev->mem_end = ti->sram + (ti->mapped_ram_size<<9) - 1; #if TR_VERBOSE { int i; DPRINTK("init_srb(%p):", ti->init_srb); for (i=0;i<17;i++) printk("%02X ", (int)readb(ti->init_srb+i)); printk("\n"); } #endif hw_encoded_addr = readw(ti->init_srb + offsetof(struct srb_init_response, encoded_address)); #if !TR_NEWFORMAT DPRINTK("srb_init_response->encoded_address: %04X\n", hw_encoded_addr); DPRINTK("ntohs(srb_init_response->encoded_address): %04X\n", ntohs(hw_encoded_addr)); #endif encoded_addr=(ti->sram + ntohs(hw_encoded_addr)); ti->ring_speed = readb(ti->init_srb+offsetof(struct srb_init_response, init_status)) & 0x01 ? 16 : 4; #if !TR_NEWFORMAT DPRINTK("encoded addr (%04X,%04X,%08X): ", hw_encoded_addr, ntohs(hw_encoded_addr), encoded_addr); #else DPRINTK("Initial interrupt : %d Mbps, shared RAM base %08x.\n", ti->ring_speed, ti->sram); #endif ti->auto_ringspeedsave=readb(ti->init_srb +offsetof(struct srb_init_response, init_status_2)) & 0x4 ? TRUE : FALSE; #if !TR_NEWFORMAT for(i=0;idev_addr[i]=readb(encoded_addr + i); printk("%02X%s", dev->dev_addr[i], (i==TR_ALEN-1) ? "" : ":" ); } printk("\n"); #endif tok_open_adapter((unsigned long)dev); } static int tok_init_card(struct device *dev) { struct tok_info *ti; short PIOaddr; unsigned long i; PIOaddr = dev->base_addr; ti=(struct tok_info *) dev->priv; /* Special processing for first interrupt after reset */ ti->do_tok_int=FIRST_INT; /* Reset adapter */ dev->tbusy=1; /* nothing can be done before reset and open completed */ #ifdef ENABLE_PAGING if(ti->page_mask) writeb(SRPR_ENABLE_PAGING, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN); #endif writeb(~INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN); #if !TR_NEWFORMAT DPRINTK("resetting card\n"); #endif outb(0, PIOaddr+ADAPTRESET); for (i=jiffies+TR_RESET_INTERVAL; time_before_eq(jiffies, i);); /* wait 50ms */ outb(0,PIOaddr+ADAPTRESETREL); #if !TR_NEWFORMAT DPRINTK("card reset\n"); #endif ti->open_status=IN_PROGRESS; writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN); return 0; } static void open_sap(unsigned char type,struct device *dev) { int i; struct tok_info *ti=(struct tok_info *) dev->priv; SET_PAGE(ti->srb); for (i=0; isrb+i); writeb(DLC_OPEN_SAP, ti->srb + offsetof(struct dlc_open_sap, command)); writew(htons(MAX_I_FIELD), ti->srb + offsetof(struct dlc_open_sap, max_i_field)); writeb(SAP_OPEN_IND_SAP | SAP_OPEN_PRIORITY, ti->srb + offsetof(struct dlc_open_sap, sap_options)); writeb(SAP_OPEN_STATION_CNT, ti->srb + offsetof(struct dlc_open_sap, station_count)); writeb(type, ti->srb + offsetof(struct dlc_open_sap, sap_value)); writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); } void tok_open_adapter(unsigned long dev_addr) { struct device *dev=(struct device *)dev_addr; struct tok_info *ti; int i; ti=(struct tok_info *) dev->priv; #if !TR_NEWFORMAT DPRINTK("now opening the board...\n"); #endif writeb(~SRB_RESP_INT, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD); writeb(~CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_RESET + ISRA_ODD); for (i=0; iinit_srb+i); writeb(DIR_OPEN_ADAPTER, ti->init_srb + offsetof(struct dir_open_adapter, command)); writew(htons(OPEN_PASS_BCON_MAC), ti->init_srb + offsetof(struct dir_open_adapter, open_options)); if (ti->ring_speed == 16) { writew(htons(ti->dhb_size16mb), ti->init_srb + offsetof(struct dir_open_adapter, dhb_length)); writew(htons(ti->rbuf_cnt16), ti->init_srb + offsetof(struct dir_open_adapter, num_rcv_buf)); writew(htons(ti->rbuf_len16), ti->init_srb + offsetof(struct dir_open_adapter, rcv_buf_len)); } else { writew(htons(ti->dhb_size4mb), ti->init_srb + offsetof(struct dir_open_adapter, dhb_length)); writew(htons(ti->rbuf_cnt4), ti->init_srb + offsetof(struct dir_open_adapter, num_rcv_buf)); writew(htons(ti->rbuf_len4), ti->init_srb + offsetof(struct dir_open_adapter, rcv_buf_len)); } writeb(NUM_DHB, /* always 2 */ ti->init_srb + offsetof(struct dir_open_adapter, num_dhb)); writeb(DLC_MAX_SAP, ti->init_srb + offsetof(struct dir_open_adapter, dlc_max_sap)); writeb(DLC_MAX_STA, ti->init_srb + offsetof(struct dir_open_adapter, dlc_max_sta)); ti->srb=ti->init_srb; /* We use this one in the interrupt handler */ writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN); writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); } static void tr_tx(struct device *dev) { struct tok_info *ti=(struct tok_info *) dev->priv; struct trh_hdr *trhdr=(struct trh_hdr *)ti->current_skb->data; unsigned int hdr_len; __u32 dhb; unsigned char xmit_command; int i; struct trllc *llc; if (readb(ti->asb + offsetof(struct asb_xmit_resp, ret_code))!=0xFF) DPRINTK("ASB not free !!!\n"); /* in providing the transmit interrupts, is telling us it is ready for data and providing a shared memory address for us to stuff with data. Here we compute the effective address where we will place data.*/ dhb=ti->sram +ntohs(readw(ti->arb + offsetof(struct arb_xmit_req, dhb_address))); /* Figure out the size of the 802.5 header */ if (!(trhdr->saddr[0] & 0x80)) /* RIF present? */ hdr_len=sizeof(struct trh_hdr)-TR_MAXRIFLEN; else hdr_len=((ntohs(trhdr->rcf) & TR_RCF_LEN_MASK)>>8) +sizeof(struct trh_hdr)-TR_MAXRIFLEN; llc = (struct trllc *)(ti->current_skb->data + hdr_len); xmit_command = readb(ti->srb + offsetof(struct srb_xmit, command)); writeb(xmit_command, ti->asb + offsetof(struct asb_xmit_resp, command)); writew(readb(ti->srb + offsetof(struct srb_xmit, station_id)), ti->asb + offsetof(struct asb_xmit_resp, station_id)); writeb(llc->ssap, ti->asb + offsetof(struct asb_xmit_resp, rsap_value)); writeb(readb(ti->srb + offsetof(struct srb_xmit, cmd_corr)), ti->asb + offsetof(struct asb_xmit_resp, cmd_corr)); writeb(0, ti->asb + offsetof(struct asb_xmit_resp, ret_code)); if ((xmit_command==XMIT_XID_CMD) || (xmit_command==XMIT_TEST_CMD)) { writew(htons(0x11), ti->asb + offsetof(struct asb_xmit_resp, frame_length)); writeb(0x0e, ti->asb + offsetof(struct asb_xmit_resp, hdr_length)); writeb(AC, dhb); writeb(LLC_FRAME, dhb+1); for (i=0; immio + ACA_OFFSET + ACA_SET + ISRA_ODD); return; } /* * the token ring packet is copied from sk_buff to the adapter * buffer identified in the command data received with the interrupt. */ writeb(hdr_len, ti->asb + offsetof(struct asb_xmit_resp, hdr_length)); writew(htons(ti->current_skb->len), ti->asb + offsetof(struct asb_xmit_resp, frame_length)); memcpy_toio(dhb, ti->current_skb->data, ti->current_skb->len); writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); ti->tr_stats.tx_bytes+=ti->current_skb->len; dev->tbusy=0; dev_kfree_skb(ti->current_skb); ti->current_skb=NULL; mark_bh(NET_BH); if (ti->readlog_pending) ibmtr_readlog(dev); } static void tr_rx(struct device *dev) { struct tok_info *ti=(struct tok_info *) dev->priv; __u32 rbuffer, rbufdata; __u32 llc; unsigned char *data; unsigned int rbuffer_len, lan_hdr_len, hdr_len, ip_len, length; struct sk_buff *skb; unsigned int skb_size = 0; int IPv4_p = 0; unsigned int chksum = 0; struct iphdr *iph; rbuffer=(ti->sram +ntohs(readw(ti->arb + offsetof(struct arb_rec_req, rec_buf_addr))))+2; if(readb(ti->asb + offsetof(struct asb_rec, ret_code))!=0xFF) DPRINTK("ASB not free !!!\n"); writeb(REC_DATA, ti->asb + offsetof(struct asb_rec, command)); writew(readw(ti->arb + offsetof(struct arb_rec_req, station_id)), ti->asb + offsetof(struct asb_rec, station_id)); writew(readw(ti->arb + offsetof(struct arb_rec_req, rec_buf_addr)), ti->asb + offsetof(struct asb_rec, rec_buf_addr)); lan_hdr_len=readb(ti->arb + offsetof(struct arb_rec_req, lan_hdr_len)); hdr_len = lan_hdr_len + sizeof(struct trllc) + sizeof(struct iphdr); llc=(rbuffer + offsetof(struct rec_buf, data) + lan_hdr_len); #if TR_VERBOSE DPRINTK("offsetof data: %02X lan_hdr_len: %02X\n", (unsigned int)offsetof(struct rec_buf,data), (unsigned int)lan_hdr_len); DPRINTK("llc: %08X rec_buf_addr: %04X ti->sram: %p\n", llc, ntohs(readw(ti->arb + offsetof(struct arb_rec_req, rec_buf_addr))), ti->sram); DPRINTK("dsap: %02X, ssap: %02X, llc: %02X, protid: %02X%02X%02X, " "ethertype: %04X\n", (int)readb(llc + offsetof(struct trllc, dsap)), (int)readb(llc + offsetof(struct trllc, ssap)), (int)readb(llc + offsetof(struct trllc, llc)), (int)readb(llc + offsetof(struct trllc, protid)), (int)readb(llc + offsetof(struct trllc, protid)+1), (int)readb(llc + offsetof(struct trllc, protid)+2), (int)readw(llc + offsetof(struct trllc, ethertype))); #endif if (readb(llc + offsetof(struct trllc, llc))!=UI_CMD) { writeb(DATA_LOST, ti->asb + offsetof(struct asb_rec, ret_code)); ti->tr_stats.rx_dropped++; writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); return; } length = ntohs(readw(ti->arb+offsetof(struct arb_rec_req, frame_len))); if ((readb(llc + offsetof(struct trllc, dsap))==EXTENDED_SAP) && (readb(llc + offsetof(struct trllc, ssap))==EXTENDED_SAP) && (length>=hdr_len)) { IPv4_p = 1; } #if TR_VERBOSE if (!IPv4_p){ __u32 trhhdr; trhhdr=(rbuffer+offsetof(struct rec_buf,data)); DPRINTK("Probably non-IP frame received.\n"); DPRINTK("ssap: %02X dsap: %02X saddr: %02X:%02X:%02X:%02X:%02X:%02X " "daddr: %02X:%02X:%02X:%02X:%02X:%02X\n", (int)readb(llc + offsetof(struct trllc, ssap)), (int)readb(llc + offsetof(struct trllc, dsap)), (int)readb(trhhdr + offsetof(struct trh_hdr, saddr)), (int)readb(trhhdr + offsetof(struct trh_hdr, saddr)+1), (int)readb(trhhdr + offsetof(struct trh_hdr, saddr)+2), (int)readb(trhhdr + offsetof(struct trh_hdr, saddr)+3), (int)readb(trhhdr + offsetof(struct trh_hdr, saddr)+4), (int)readb(trhhdr + offsetof(struct trh_hdr, saddr)+5), (int)readb(trhhdr + offsetof(struct trh_hdr, daddr)), (int)readb(trhhdr + offsetof(struct trh_hdr, daddr)+1), (int)readb(trhhdr + offsetof(struct trh_hdr, daddr)+2), (int)readb(trhhdr + offsetof(struct trh_hdr, daddr)+3), (int)readb(trhhdr + offsetof(struct trh_hdr, daddr)+4), (int)readb(trhhdr + offsetof(struct trh_hdr, daddr)+5)); } #endif skb_size = length-lan_hdr_len+sizeof(struct trh_hdr)+sizeof(struct trllc); if (!(skb=dev_alloc_skb(skb_size))) { DPRINTK("out of memory. frame dropped.\n"); ti->tr_stats.rx_dropped++; writeb(DATA_LOST, ti->asb + offsetof(struct asb_rec, ret_code)); writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); return; } skb_put(skb, length); skb_reserve(skb, sizeof(struct trh_hdr)-lan_hdr_len+sizeof(struct trllc)); skb->dev=dev; data=skb->data; rbuffer_len=ntohs(readw(rbuffer + offsetof(struct rec_buf, buf_len))); rbufdata = rbuffer + offsetof(struct rec_buf,data); if (IPv4_p) { /* Copy the headers without checksumming */ memcpy_fromio(data, rbufdata, hdr_len); /* Watch for padded packets and bogons */ iph=(struct iphdr*)(data + lan_hdr_len + sizeof(struct trllc)); ip_len = ntohs(iph->tot_len) - sizeof(struct iphdr); length -= hdr_len; if ((ip_len <= length) && (ip_len > 7)) length = ip_len; data += hdr_len; rbuffer_len -= hdr_len; rbufdata += hdr_len; } /* Copy the payload... */ for (;;) { if (IPv4_p) chksum = csum_partial_copy(bus_to_virt(rbufdata), data, length < rbuffer_len ? length : rbuffer_len, chksum); else memcpy_fromio(data, rbufdata, rbuffer_len); rbuffer = ntohs(readw(rbuffer)); if (!rbuffer) break; length -= rbuffer_len; data += rbuffer_len; rbuffer += ti->sram; rbuffer_len = ntohs(readw(rbuffer + offsetof(struct rec_buf, buf_len))); rbufdata = rbuffer + offsetof(struct rec_buf, data); } writeb(0, ti->asb + offsetof(struct asb_rec, ret_code)); writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); ti->tr_stats.rx_bytes += skb->len; ti->tr_stats.rx_packets++; skb->protocol = tr_type_trans(skb,dev); if (IPv4_p){ skb->csum = chksum; skb->ip_summed = 1; } netif_rx(skb); } static int tok_send_packet(struct sk_buff *skb, struct device *dev) { struct tok_info *ti; ti=(struct tok_info *) dev->priv; if (dev->tbusy) { int ticks_waited; ticks_waited=jiffies - dev->trans_start; if (ticks_waitedtrans_start+=5; /* we fake the transmission start time... */ return 1; } if (test_and_set_bit(0,(void *)&dev->tbusy)!=0) DPRINTK("Transmitter access conflict\n"); else { int flags; /* lock against other CPUs */ spin_lock_irqsave(&(ti->lock), flags); /* Save skb; we'll need it when the adapter asks for the data */ ti->current_skb=skb; writeb(XMIT_UI_FRAME, ti->srb + offsetof(struct srb_xmit, command)); writew(ti->exsap_station_id, ti->srb +offsetof(struct srb_xmit, station_id)); writeb(CMD_IN_SRB, (ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD)); spin_unlock_irqrestore(&(ti->lock), flags); dev->trans_start=jiffies; } return 0; } void ibmtr_reset_timer(struct timer_list *tmr, struct device *dev) { tmr->expires = jiffies + TR_RETRY_INTERVAL; tmr->data = (unsigned long) dev; tmr->function = tok_open_adapter; init_timer(tmr); add_timer(tmr); } void ibmtr_readlog(struct device *dev) { struct tok_info *ti; ti=(struct tok_info *) dev->priv; ti->readlog_pending = 0; writeb(DIR_READ_LOG, ti->srb); writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN); writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); dev->tbusy=1; /* really srb busy... */ } /* tok_get_stats(): Basically a scaffold routine which will return the address of the tr_statistics structure associated with this device -- the tr.... structure is an ethnet look-alike so at least for this iteration may suffice. */ static struct net_device_stats * tok_get_stats(struct device *dev) { struct tok_info *toki; toki=(struct tok_info *) dev->priv; return (struct net_device_stats *) &toki->tr_stats; } int ibmtr_change_mtu(struct device *dev, int mtu) { struct tok_info *ti = (struct tok_info *) dev->priv; if (ti->ring_speed == 16 && mtu > ti->maxmtu16) return -EINVAL; if (ti->ring_speed == 4 && mtu > ti->maxmtu4) return -EINVAL; dev->mtu = mtu; return 0; } #ifdef MODULE /* 3COM 3C619C supports 8 interrupts, 32 I/O ports */ static struct device* dev_ibmtr[IBMTR_MAX_ADAPTERS]; static int io[IBMTR_MAX_ADAPTERS] = {0xa20,0xa24}; static int irq[IBMTR_MAX_ADAPTERS] = {0,0}; static int mem[IBMTR_MAX_ADAPTERS] = {0,0}; MODULE_PARM(io, "1-" __MODULE_STRING(IBMTR_MAX_ADAPTERS) "i"); MODULE_PARM(irq, "1-" __MODULE_STRING(IBMTR_MAX_ADAPTERS) "i"); MODULE_PARM(mem, "1-" __MODULE_STRING(IBMTR_MAX_ADAPTERS) "i"); int init_module(void) { int i; for (i = 0; io[i] && (ibase_addr = io[i]; dev_ibmtr[i]->irq = irq[i]; dev_ibmtr[i]->mem_start = mem[i]; dev_ibmtr[i]->init = &ibmtr_probe; if (register_trdev(dev_ibmtr[i]) != 0) { kfree_s(dev_ibmtr[i], sizeof(struct device)); dev_ibmtr[i] = NULL; if (i == 0) { printk("ibmtr: register_trdev() returned non-zero.\n"); return -EIO; } else { return 0; } } } return 0; } void cleanup_module(void) { int i; for (i = 0; i < IBMTR_MAX_ADAPTERS; i++) if (dev_ibmtr[i]) { unregister_trdev(dev_ibmtr[i]); free_irq(dev_ibmtr[i]->irq, dev_ibmtr[i]); release_region(dev_ibmtr[i]->base_addr, IBMTR_IO_EXTENT); kfree_s(dev_ibmtr[i]->priv, sizeof(struct tok_info)); kfree_s(dev_ibmtr[i], sizeof(struct device)); dev_ibmtr[i] = NULL; } } #endif /* MODULE */