11da177e4SLinus Torvalds /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */ 21da177e4SLinus Torvalds 31da177e4SLinus Torvalds /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ 41da177e4SLinus Torvalds 51da177e4SLinus Torvalds 61da177e4SLinus Torvalds #include <linux/module.h> 71da177e4SLinus Torvalds #include <linux/kernel.h> 81da177e4SLinus Torvalds #include <linux/mm.h> 91da177e4SLinus Torvalds #include <linux/pci.h> 101da177e4SLinus Torvalds #include <linux/errno.h> 111da177e4SLinus Torvalds #include <linux/atm.h> 121da177e4SLinus Torvalds #include <linux/atmdev.h> 131da177e4SLinus Torvalds #include <linux/sonet.h> 141da177e4SLinus Torvalds #include <linux/skbuff.h> 151da177e4SLinus Torvalds #include <linux/time.h> 161da177e4SLinus Torvalds #include <linux/delay.h> 171da177e4SLinus Torvalds #include <linux/uio.h> 181da177e4SLinus Torvalds #include <linux/init.h> 191da177e4SLinus Torvalds #include <linux/atm_eni.h> 201da177e4SLinus Torvalds #include <linux/bitops.h> 211da177e4SLinus Torvalds #include <asm/system.h> 221da177e4SLinus Torvalds #include <asm/io.h> 231da177e4SLinus Torvalds #include <asm/atomic.h> 241da177e4SLinus Torvalds #include <asm/uaccess.h> 251da177e4SLinus Torvalds #include <asm/string.h> 261da177e4SLinus Torvalds #include <asm/byteorder.h> 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds #include "tonga.h" 291da177e4SLinus Torvalds #include "midway.h" 301da177e4SLinus Torvalds #include "suni.h" 311da177e4SLinus Torvalds #include "eni.h" 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds #if !defined(__i386__) && !defined(__x86_64__) 341da177e4SLinus Torvalds #ifndef ioremap_nocache 351da177e4SLinus Torvalds #define ioremap_nocache(X,Y) ioremap(X,Y) 361da177e4SLinus Torvalds #endif 371da177e4SLinus Torvalds #endif 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds /* 401da177e4SLinus Torvalds * TODO: 411da177e4SLinus Torvalds * 421da177e4SLinus Torvalds * Show stoppers 431da177e4SLinus Torvalds * none 441da177e4SLinus Torvalds * 451da177e4SLinus Torvalds * Minor 461da177e4SLinus Torvalds * - OAM support 471da177e4SLinus Torvalds * - fix bugs listed below 481da177e4SLinus Torvalds */ 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds /* 511da177e4SLinus Torvalds * KNOWN BUGS: 521da177e4SLinus Torvalds * 531da177e4SLinus Torvalds * - may run into JK-JK bug and deadlock 541da177e4SLinus Torvalds * - should allocate UBR channel first 551da177e4SLinus Torvalds * - buffer space allocation algorithm is stupid 561da177e4SLinus Torvalds * (RX: should be maxSDU+maxdelay*rate 571da177e4SLinus Torvalds * TX: should be maxSDU+min(maxSDU,maxdelay*rate) ) 581da177e4SLinus Torvalds * - doesn't support OAM cells 591da177e4SLinus Torvalds * - eni_put_free may hang if not putting memory fragments that _complete_ 601da177e4SLinus Torvalds * 2^n block (never happens in real life, though) 611da177e4SLinus Torvalds */ 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds 641da177e4SLinus Torvalds #if 0 651da177e4SLinus Torvalds #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) 661da177e4SLinus Torvalds #else 671da177e4SLinus Torvalds #define DPRINTK(format,args...) 681da177e4SLinus Torvalds #endif 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds #ifndef CONFIG_ATM_ENI_TUNE_BURST 721da177e4SLinus Torvalds #define CONFIG_ATM_ENI_BURST_TX_8W 731da177e4SLinus Torvalds #define CONFIG_ATM_ENI_BURST_RX_4W 741da177e4SLinus Torvalds #endif 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds #ifndef CONFIG_ATM_ENI_DEBUG 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds #define NULLCHECK(x) 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds #define EVENT(s,a,b) 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds static void event_dump(void) 861da177e4SLinus Torvalds { 871da177e4SLinus Torvalds } 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds #else 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds /* 941da177e4SLinus Torvalds * NULL pointer checking 951da177e4SLinus Torvalds */ 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds #define NULLCHECK(x) \ 981da177e4SLinus Torvalds if ((unsigned long) (x) < 0x30) \ 991da177e4SLinus Torvalds printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x)) 1001da177e4SLinus Torvalds 1011da177e4SLinus Torvalds /* 1021da177e4SLinus Torvalds * Very extensive activity logging. Greatly improves bug detection speed but 1031da177e4SLinus Torvalds * costs a few Mbps if enabled. 1041da177e4SLinus Torvalds */ 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds #define EV 64 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds static const char *ev[EV]; 1091da177e4SLinus Torvalds static unsigned long ev_a[EV],ev_b[EV]; 1101da177e4SLinus Torvalds static int ec = 0; 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds 1131da177e4SLinus Torvalds static void EVENT(const char *s,unsigned long a,unsigned long b) 1141da177e4SLinus Torvalds { 1151da177e4SLinus Torvalds ev[ec] = s; 1161da177e4SLinus Torvalds ev_a[ec] = a; 1171da177e4SLinus Torvalds ev_b[ec] = b; 1181da177e4SLinus Torvalds ec = (ec+1) % EV; 1191da177e4SLinus Torvalds } 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds static void event_dump(void) 1231da177e4SLinus Torvalds { 1241da177e4SLinus Torvalds int n,i; 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds for (n = 0; n < EV; n++) { 1271da177e4SLinus Torvalds i = (ec+n) % EV; 1281da177e4SLinus Torvalds printk(KERN_NOTICE); 1291da177e4SLinus Torvalds printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]); 1301da177e4SLinus Torvalds } 1311da177e4SLinus Torvalds } 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds #endif /* CONFIG_ATM_ENI_DEBUG */ 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds /* 1381da177e4SLinus Torvalds * NExx must not be equal at end 1391da177e4SLinus Torvalds * EExx may be equal at end 1401da177e4SLinus Torvalds * xxPJOK verify validity of pointer jumps 1411da177e4SLinus Torvalds * xxPMOK operating on a circular buffer of "c" words 1421da177e4SLinus Torvalds */ 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds #define NEPJOK(a0,a1,b) \ 1451da177e4SLinus Torvalds ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1)) 1461da177e4SLinus Torvalds #define EEPJOK(a0,a1,b) \ 1471da177e4SLinus Torvalds ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1)) 1481da177e4SLinus Torvalds #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b) 1491da177e4SLinus Torvalds #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b) 1501da177e4SLinus Torvalds 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0, 1531da177e4SLinus Torvalds backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0, 1541da177e4SLinus Torvalds putting = 0; 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds static struct atm_dev *eni_boards = NULL; 1571da177e4SLinus Torvalds 1581da177e4SLinus Torvalds static u32 *cpu_zeroes = NULL; /* aligned "magic" zeroes */ 1591da177e4SLinus Torvalds static dma_addr_t zeroes; 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds /* Read/write registers on card */ 1621da177e4SLinus Torvalds #define eni_in(r) readl(eni_dev->reg+(r)*4) 1631da177e4SLinus Torvalds #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4) 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds /*-------------------------------- utilities --------------------------------*/ 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds static void dump_mem(struct eni_dev *eni_dev) 1701da177e4SLinus Torvalds { 1711da177e4SLinus Torvalds int i; 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds for (i = 0; i < eni_dev->free_len; i++) 1741da177e4SLinus Torvalds printk(KERN_DEBUG " %d: %p %d\n",i, 1751da177e4SLinus Torvalds eni_dev->free_list[i].start, 1761da177e4SLinus Torvalds 1 << eni_dev->free_list[i].order); 1771da177e4SLinus Torvalds } 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds static void dump(struct atm_dev *dev) 1811da177e4SLinus Torvalds { 1821da177e4SLinus Torvalds struct eni_dev *eni_dev; 1831da177e4SLinus Torvalds 1841da177e4SLinus Torvalds int i; 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds eni_dev = ENI_DEV(dev); 1871da177e4SLinus Torvalds printk(KERN_NOTICE "Free memory\n"); 1881da177e4SLinus Torvalds dump_mem(eni_dev); 1891da177e4SLinus Torvalds printk(KERN_NOTICE "TX buffers\n"); 1901da177e4SLinus Torvalds for (i = 0; i < NR_CHAN; i++) 1911da177e4SLinus Torvalds if (eni_dev->tx[i].send) 1921da177e4SLinus Torvalds printk(KERN_NOTICE " TX %d @ %p: %ld\n",i, 1931da177e4SLinus Torvalds eni_dev->tx[i].send,eni_dev->tx[i].words*4); 1941da177e4SLinus Torvalds printk(KERN_NOTICE "RX buffers\n"); 1951da177e4SLinus Torvalds for (i = 0; i < 1024; i++) 1961da177e4SLinus Torvalds if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx) 1971da177e4SLinus Torvalds printk(KERN_NOTICE " RX %d @ %p: %ld\n",i, 1981da177e4SLinus Torvalds ENI_VCC(eni_dev->rx_map[i])->recv, 1991da177e4SLinus Torvalds ENI_VCC(eni_dev->rx_map[i])->words*4); 2001da177e4SLinus Torvalds printk(KERN_NOTICE "----\n"); 2011da177e4SLinus Torvalds } 2021da177e4SLinus Torvalds 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start, 2051da177e4SLinus Torvalds unsigned long size) 2061da177e4SLinus Torvalds { 2071da177e4SLinus Torvalds struct eni_free *list; 2081da177e4SLinus Torvalds int len,order; 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size); 2111da177e4SLinus Torvalds start += eni_dev->base_diff; 2121da177e4SLinus Torvalds list = eni_dev->free_list; 2131da177e4SLinus Torvalds len = eni_dev->free_len; 2141da177e4SLinus Torvalds while (size) { 2151da177e4SLinus Torvalds if (len >= eni_dev->free_list_size) { 2161da177e4SLinus Torvalds printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n", 2171da177e4SLinus Torvalds start,size); 2181da177e4SLinus Torvalds break; 2191da177e4SLinus Torvalds } 2201da177e4SLinus Torvalds for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++); 2211da177e4SLinus Torvalds if (MID_MIN_BUF_SIZE > (1 << order)) { 2221da177e4SLinus Torvalds printk(KERN_CRIT "eni_put_free: order %d too small\n", 2231da177e4SLinus Torvalds order); 2241da177e4SLinus Torvalds break; 2251da177e4SLinus Torvalds } 2261da177e4SLinus Torvalds list[len].start = (void __iomem *) start; 2271da177e4SLinus Torvalds list[len].order = order; 2281da177e4SLinus Torvalds len++; 2291da177e4SLinus Torvalds start += 1 << order; 2301da177e4SLinus Torvalds size -= 1 << order; 2311da177e4SLinus Torvalds } 2321da177e4SLinus Torvalds eni_dev->free_len = len; 2331da177e4SLinus Torvalds /*dump_mem(eni_dev);*/ 2341da177e4SLinus Torvalds } 2351da177e4SLinus Torvalds 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size) 2381da177e4SLinus Torvalds { 2391da177e4SLinus Torvalds struct eni_free *list; 2401da177e4SLinus Torvalds void __iomem *start; 2411da177e4SLinus Torvalds int len,i,order,best_order,index; 2421da177e4SLinus Torvalds 2431da177e4SLinus Torvalds list = eni_dev->free_list; 2441da177e4SLinus Torvalds len = eni_dev->free_len; 2451da177e4SLinus Torvalds if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE; 2461da177e4SLinus Torvalds if (*size > MID_MAX_BUF_SIZE) return NULL; 2471da177e4SLinus Torvalds for (order = 0; (1 << order) < *size; order++); 2481da177e4SLinus Torvalds DPRINTK("trying: %ld->%d\n",*size,order); 2491da177e4SLinus Torvalds best_order = 65; /* we don't have more than 2^64 of anything ... */ 2501da177e4SLinus Torvalds index = 0; /* silence GCC */ 2511da177e4SLinus Torvalds for (i = 0; i < len; i++) 2521da177e4SLinus Torvalds if (list[i].order == order) { 2531da177e4SLinus Torvalds best_order = order; 2541da177e4SLinus Torvalds index = i; 2551da177e4SLinus Torvalds break; 2561da177e4SLinus Torvalds } 2571da177e4SLinus Torvalds else if (best_order > list[i].order && list[i].order > order) { 2581da177e4SLinus Torvalds best_order = list[i].order; 2591da177e4SLinus Torvalds index = i; 2601da177e4SLinus Torvalds } 2611da177e4SLinus Torvalds if (best_order == 65) return NULL; 2621da177e4SLinus Torvalds start = list[index].start-eni_dev->base_diff; 2631da177e4SLinus Torvalds list[index] = list[--len]; 2641da177e4SLinus Torvalds eni_dev->free_len = len; 2651da177e4SLinus Torvalds *size = 1 << order; 2661da177e4SLinus Torvalds eni_put_free(eni_dev,start+*size,(1 << best_order)-*size); 2671da177e4SLinus Torvalds DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start); 2681da177e4SLinus Torvalds memset_io(start,0,*size); /* never leak data */ 2691da177e4SLinus Torvalds /*dump_mem(eni_dev);*/ 2701da177e4SLinus Torvalds return start; 2711da177e4SLinus Torvalds } 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds 2741da177e4SLinus Torvalds static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start, 2751da177e4SLinus Torvalds unsigned long size) 2761da177e4SLinus Torvalds { 2771da177e4SLinus Torvalds struct eni_free *list; 2781da177e4SLinus Torvalds int len,i,order; 2791da177e4SLinus Torvalds 2801da177e4SLinus Torvalds start += eni_dev->base_diff; 2811da177e4SLinus Torvalds list = eni_dev->free_list; 2821da177e4SLinus Torvalds len = eni_dev->free_len; 2831da177e4SLinus Torvalds for (order = -1; size; order++) size >>= 1; 2841da177e4SLinus Torvalds DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order); 2851da177e4SLinus Torvalds for (i = 0; i < len; i++) 2861da177e4SLinus Torvalds if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) && 2871da177e4SLinus Torvalds list[i].order == order) { 2881da177e4SLinus Torvalds DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i, 2891da177e4SLinus Torvalds list[i].start,start,1 << order,list[i].order,order); 2901da177e4SLinus Torvalds list[i] = list[--len]; 2911da177e4SLinus Torvalds start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order)); 2921da177e4SLinus Torvalds order++; 2931da177e4SLinus Torvalds i = -1; 2941da177e4SLinus Torvalds continue; 2951da177e4SLinus Torvalds } 2961da177e4SLinus Torvalds if (len >= eni_dev->free_list_size) { 2971da177e4SLinus Torvalds printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start, 2981da177e4SLinus Torvalds order); 2991da177e4SLinus Torvalds return; 3001da177e4SLinus Torvalds } 3011da177e4SLinus Torvalds list[len].start = start; 3021da177e4SLinus Torvalds list[len].order = order; 3031da177e4SLinus Torvalds eni_dev->free_len = len+1; 3041da177e4SLinus Torvalds /*dump_mem(eni_dev);*/ 3051da177e4SLinus Torvalds } 3061da177e4SLinus Torvalds 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvalds /*----------------------------------- RX ------------------------------------*/ 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvalds 3111da177e4SLinus Torvalds #define ENI_VCC_NOS ((struct atm_vcc *) 1) 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds static void rx_ident_err(struct atm_vcc *vcc) 3151da177e4SLinus Torvalds { 3161da177e4SLinus Torvalds struct atm_dev *dev; 3171da177e4SLinus Torvalds struct eni_dev *eni_dev; 3181da177e4SLinus Torvalds struct eni_vcc *eni_vcc; 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds dev = vcc->dev; 3211da177e4SLinus Torvalds eni_dev = ENI_DEV(dev); 3221da177e4SLinus Torvalds /* immediately halt adapter */ 3231da177e4SLinus Torvalds eni_out(eni_in(MID_MC_S) & 3241da177e4SLinus Torvalds ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S); 3251da177e4SLinus Torvalds /* dump useful information */ 3261da177e4SLinus Torvalds eni_vcc = ENI_VCC(vcc); 3271da177e4SLinus Torvalds printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident " 3281da177e4SLinus Torvalds "mismatch\n",dev->number); 3291da177e4SLinus Torvalds printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci, 3301da177e4SLinus Torvalds eni_vcc->rxing,eni_vcc->words); 3311da177e4SLinus Torvalds printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value " 3321da177e4SLinus Torvalds "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos, 3331da177e4SLinus Torvalds (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4)); 3341da177e4SLinus Torvalds printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last, 3351da177e4SLinus Torvalds eni_vcc->servicing); 3361da177e4SLinus Torvalds EVENT("---dump ends here---\n",0,0); 3371da177e4SLinus Torvalds printk(KERN_NOTICE "---recent events---\n"); 3381da177e4SLinus Torvalds event_dump(); 3391da177e4SLinus Torvalds ENI_DEV(dev)->fast = NULL; /* really stop it */ 3401da177e4SLinus Torvalds ENI_DEV(dev)->slow = NULL; 3411da177e4SLinus Torvalds skb_queue_head_init(&ENI_DEV(dev)->rx_queue); 3421da177e4SLinus Torvalds } 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb, 3461da177e4SLinus Torvalds unsigned long skip,unsigned long size,unsigned long eff) 3471da177e4SLinus Torvalds { 3481da177e4SLinus Torvalds struct eni_dev *eni_dev; 3491da177e4SLinus Torvalds struct eni_vcc *eni_vcc; 3501da177e4SLinus Torvalds u32 dma_rd,dma_wr; 3511da177e4SLinus Torvalds u32 dma[RX_DMA_BUF*2]; 3521da177e4SLinus Torvalds dma_addr_t paddr; 3531da177e4SLinus Torvalds unsigned long here; 3541da177e4SLinus Torvalds int i,j; 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds eni_dev = ENI_DEV(vcc->dev); 3571da177e4SLinus Torvalds eni_vcc = ENI_VCC(vcc); 3581da177e4SLinus Torvalds paddr = 0; /* GCC, shut up */ 3591da177e4SLinus Torvalds if (skb) { 3601da177e4SLinus Torvalds paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len, 3611da177e4SLinus Torvalds PCI_DMA_FROMDEVICE); 3621da177e4SLinus Torvalds ENI_PRV_PADDR(skb) = paddr; 3631da177e4SLinus Torvalds if (paddr & 3) 3641da177e4SLinus Torvalds printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has " 3651da177e4SLinus Torvalds "mis-aligned RX data (0x%lx)\n",vcc->dev->number, 3661da177e4SLinus Torvalds vcc->vci,(unsigned long) paddr); 3671da177e4SLinus Torvalds ENI_PRV_SIZE(skb) = size+skip; 3681da177e4SLinus Torvalds /* PDU plus descriptor */ 3691da177e4SLinus Torvalds ATM_SKB(skb)->vcc = vcc; 3701da177e4SLinus Torvalds } 3711da177e4SLinus Torvalds j = 0; 3721da177e4SLinus Torvalds if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */ 3731da177e4SLinus Torvalds here = (eni_vcc->descr+skip) & (eni_vcc->words-1); 3741da177e4SLinus Torvalds dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci 3751da177e4SLinus Torvalds << MID_DMA_VCI_SHIFT) | MID_DT_JK; 3761da177e4SLinus Torvalds j++; 3771da177e4SLinus Torvalds } 3781da177e4SLinus Torvalds here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1); 3791da177e4SLinus Torvalds if (!eff) size += skip; 3801da177e4SLinus Torvalds else { 3811da177e4SLinus Torvalds unsigned long words; 3821da177e4SLinus Torvalds 3831da177e4SLinus Torvalds if (!size) { 3841da177e4SLinus Torvalds DPRINTK("strange things happen ...\n"); 3851da177e4SLinus Torvalds EVENT("strange things happen ... (skip=%ld,eff=%ld)\n", 3861da177e4SLinus Torvalds size,eff); 3871da177e4SLinus Torvalds } 3881da177e4SLinus Torvalds words = eff; 3891da177e4SLinus Torvalds if (paddr & 15) { 3901da177e4SLinus Torvalds unsigned long init; 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds init = 4-((paddr & 15) >> 2); 3931da177e4SLinus Torvalds if (init > words) init = words; 3941da177e4SLinus Torvalds dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 3951da177e4SLinus Torvalds (vcc->vci << MID_DMA_VCI_SHIFT); 3961da177e4SLinus Torvalds dma[j++] = paddr; 3971da177e4SLinus Torvalds paddr += init << 2; 3981da177e4SLinus Torvalds words -= init; 3991da177e4SLinus Torvalds } 4001da177e4SLinus Torvalds #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */ 4011da177e4SLinus Torvalds if (words & ~15) { 4021da177e4SLinus Torvalds dma[j++] = MID_DT_16W | ((words >> 4) << 4031da177e4SLinus Torvalds MID_DMA_COUNT_SHIFT) | (vcc->vci << 4041da177e4SLinus Torvalds MID_DMA_VCI_SHIFT); 4051da177e4SLinus Torvalds dma[j++] = paddr; 4061da177e4SLinus Torvalds paddr += (words & ~15) << 2; 4071da177e4SLinus Torvalds words &= 15; 4081da177e4SLinus Torvalds } 4091da177e4SLinus Torvalds #endif 4101da177e4SLinus Torvalds #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */ 4111da177e4SLinus Torvalds if (words & ~7) { 4121da177e4SLinus Torvalds dma[j++] = MID_DT_8W | ((words >> 3) << 4131da177e4SLinus Torvalds MID_DMA_COUNT_SHIFT) | (vcc->vci << 4141da177e4SLinus Torvalds MID_DMA_VCI_SHIFT); 4151da177e4SLinus Torvalds dma[j++] = paddr; 4161da177e4SLinus Torvalds paddr += (words & ~7) << 2; 4171da177e4SLinus Torvalds words &= 7; 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds #endif 4201da177e4SLinus Torvalds #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */ 4211da177e4SLinus Torvalds if (words & ~3) { 4221da177e4SLinus Torvalds dma[j++] = MID_DT_4W | ((words >> 2) << 4231da177e4SLinus Torvalds MID_DMA_COUNT_SHIFT) | (vcc->vci << 4241da177e4SLinus Torvalds MID_DMA_VCI_SHIFT); 4251da177e4SLinus Torvalds dma[j++] = paddr; 4261da177e4SLinus Torvalds paddr += (words & ~3) << 2; 4271da177e4SLinus Torvalds words &= 3; 4281da177e4SLinus Torvalds } 4291da177e4SLinus Torvalds #endif 4301da177e4SLinus Torvalds #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */ 4311da177e4SLinus Torvalds if (words & ~1) { 4321da177e4SLinus Torvalds dma[j++] = MID_DT_2W | ((words >> 1) << 4331da177e4SLinus Torvalds MID_DMA_COUNT_SHIFT) | (vcc->vci << 4341da177e4SLinus Torvalds MID_DMA_VCI_SHIFT); 4351da177e4SLinus Torvalds dma[j++] = paddr; 4361da177e4SLinus Torvalds paddr += (words & ~1) << 2; 4371da177e4SLinus Torvalds words &= 1; 4381da177e4SLinus Torvalds } 4391da177e4SLinus Torvalds #endif 4401da177e4SLinus Torvalds if (words) { 4411da177e4SLinus Torvalds dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) 4421da177e4SLinus Torvalds | (vcc->vci << MID_DMA_VCI_SHIFT); 4431da177e4SLinus Torvalds dma[j++] = paddr; 4441da177e4SLinus Torvalds } 4451da177e4SLinus Torvalds } 4461da177e4SLinus Torvalds if (size != eff) { 4471da177e4SLinus Torvalds dma[j++] = (here << MID_DMA_COUNT_SHIFT) | 4481da177e4SLinus Torvalds (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK; 4491da177e4SLinus Torvalds j++; 4501da177e4SLinus Torvalds } 4511da177e4SLinus Torvalds if (!j || j > 2*RX_DMA_BUF) { 4521da177e4SLinus Torvalds printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n"); 4531da177e4SLinus Torvalds goto trouble; 4541da177e4SLinus Torvalds } 4551da177e4SLinus Torvalds dma[j-2] |= MID_DMA_END; 4561da177e4SLinus Torvalds j = j >> 1; 4571da177e4SLinus Torvalds dma_wr = eni_in(MID_DMA_WR_RX); 4581da177e4SLinus Torvalds dma_rd = eni_in(MID_DMA_RD_RX); 4591da177e4SLinus Torvalds /* 4601da177e4SLinus Torvalds * Can I move the dma_wr pointer by 2j+1 positions without overwriting 4611da177e4SLinus Torvalds * data that hasn't been read (position of dma_rd) yet ? 4621da177e4SLinus Torvalds */ 4631da177e4SLinus Torvalds if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */ 4641da177e4SLinus Torvalds printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n", 4651da177e4SLinus Torvalds vcc->dev->number); 4661da177e4SLinus Torvalds goto trouble; 4671da177e4SLinus Torvalds } 4681da177e4SLinus Torvalds for (i = 0; i < j; i++) { 4691da177e4SLinus Torvalds writel(dma[i*2],eni_dev->rx_dma+dma_wr*8); 4701da177e4SLinus Torvalds writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4); 4711da177e4SLinus Torvalds dma_wr = (dma_wr+1) & (NR_DMA_RX-1); 4721da177e4SLinus Torvalds } 4731da177e4SLinus Torvalds if (skb) { 4741da177e4SLinus Torvalds ENI_PRV_POS(skb) = eni_vcc->descr+size+1; 4751da177e4SLinus Torvalds skb_queue_tail(&eni_dev->rx_queue,skb); 4761da177e4SLinus Torvalds eni_vcc->last = skb; 4771da177e4SLinus Torvalds rx_enqueued++; 4781da177e4SLinus Torvalds } 4791da177e4SLinus Torvalds eni_vcc->descr = here; 4801da177e4SLinus Torvalds eni_out(dma_wr,MID_DMA_WR_RX); 4811da177e4SLinus Torvalds return 0; 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds trouble: 4841da177e4SLinus Torvalds if (paddr) 4851da177e4SLinus Torvalds pci_unmap_single(eni_dev->pci_dev,paddr,skb->len, 4861da177e4SLinus Torvalds PCI_DMA_FROMDEVICE); 4871da177e4SLinus Torvalds if (skb) dev_kfree_skb_irq(skb); 4881da177e4SLinus Torvalds return -1; 4891da177e4SLinus Torvalds } 4901da177e4SLinus Torvalds 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds static void discard(struct atm_vcc *vcc,unsigned long size) 4931da177e4SLinus Torvalds { 4941da177e4SLinus Torvalds struct eni_vcc *eni_vcc; 4951da177e4SLinus Torvalds 4961da177e4SLinus Torvalds eni_vcc = ENI_VCC(vcc); 4971da177e4SLinus Torvalds EVENT("discard (size=%ld)\n",size,0); 4981da177e4SLinus Torvalds while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0); 4991da177e4SLinus Torvalds /* could do a full fallback, but that might be more expensive */ 5001da177e4SLinus Torvalds if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1; 5011da177e4SLinus Torvalds else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1); 5021da177e4SLinus Torvalds } 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds /* 5061da177e4SLinus Torvalds * TODO: should check whether direct copies (without DMA setup, dequeuing on 5071da177e4SLinus Torvalds * interrupt, etc.) aren't much faster for AAL0 5081da177e4SLinus Torvalds */ 5091da177e4SLinus Torvalds 5101da177e4SLinus Torvalds static int rx_aal0(struct atm_vcc *vcc) 5111da177e4SLinus Torvalds { 5121da177e4SLinus Torvalds struct eni_vcc *eni_vcc; 5131da177e4SLinus Torvalds unsigned long descr; 5141da177e4SLinus Torvalds unsigned long length; 5151da177e4SLinus Torvalds struct sk_buff *skb; 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds DPRINTK(">rx_aal0\n"); 5181da177e4SLinus Torvalds eni_vcc = ENI_VCC(vcc); 5191da177e4SLinus Torvalds descr = readl(eni_vcc->recv+eni_vcc->descr*4); 5201da177e4SLinus Torvalds if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { 5211da177e4SLinus Torvalds rx_ident_err(vcc); 5221da177e4SLinus Torvalds return 1; 5231da177e4SLinus Torvalds } 5241da177e4SLinus Torvalds if (descr & MID_RED_T) { 5251da177e4SLinus Torvalds DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", 5261da177e4SLinus Torvalds vcc->dev->number); 5271da177e4SLinus Torvalds length = 0; 5281da177e4SLinus Torvalds atomic_inc(&vcc->stats->rx_err); 5291da177e4SLinus Torvalds } 5301da177e4SLinus Torvalds else { 5311da177e4SLinus Torvalds length = ATM_CELL_SIZE-1; /* no HEC */ 5321da177e4SLinus Torvalds } 5331da177e4SLinus Torvalds skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL; 5341da177e4SLinus Torvalds if (!skb) { 5351da177e4SLinus Torvalds discard(vcc,length >> 2); 5361da177e4SLinus Torvalds return 0; 5371da177e4SLinus Torvalds } 5381da177e4SLinus Torvalds skb_put(skb,length); 539a61bbcf2SPatrick McHardy skb_set_timestamp(skb, &eni_vcc->timestamp); 5401da177e4SLinus Torvalds DPRINTK("got len %ld\n",length); 5411da177e4SLinus Torvalds if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1; 5421da177e4SLinus Torvalds eni_vcc->rxing++; 5431da177e4SLinus Torvalds return 0; 5441da177e4SLinus Torvalds } 5451da177e4SLinus Torvalds 5461da177e4SLinus Torvalds 5471da177e4SLinus Torvalds static int rx_aal5(struct atm_vcc *vcc) 5481da177e4SLinus Torvalds { 5491da177e4SLinus Torvalds struct eni_vcc *eni_vcc; 5501da177e4SLinus Torvalds unsigned long descr; 5511da177e4SLinus Torvalds unsigned long size,eff,length; 5521da177e4SLinus Torvalds struct sk_buff *skb; 5531da177e4SLinus Torvalds 5541da177e4SLinus Torvalds EVENT("rx_aal5\n",0,0); 5551da177e4SLinus Torvalds DPRINTK(">rx_aal5\n"); 5561da177e4SLinus Torvalds eni_vcc = ENI_VCC(vcc); 5571da177e4SLinus Torvalds descr = readl(eni_vcc->recv+eni_vcc->descr*4); 5581da177e4SLinus Torvalds if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { 5591da177e4SLinus Torvalds rx_ident_err(vcc); 5601da177e4SLinus Torvalds return 1; 5611da177e4SLinus Torvalds } 5621da177e4SLinus Torvalds if (descr & (MID_RED_T | MID_RED_CRC_ERR)) { 5631da177e4SLinus Torvalds if (descr & MID_RED_T) { 5641da177e4SLinus Torvalds EVENT("empty cell (descr=0x%lx)\n",descr,0); 5651da177e4SLinus Torvalds DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", 5661da177e4SLinus Torvalds vcc->dev->number); 5671da177e4SLinus Torvalds size = 0; 5681da177e4SLinus Torvalds } 5691da177e4SLinus Torvalds else { 5701da177e4SLinus Torvalds static unsigned long silence = 0; 5711da177e4SLinus Torvalds 5721da177e4SLinus Torvalds if (time_after(jiffies, silence) || silence == 0) { 5731da177e4SLinus Torvalds printk(KERN_WARNING DEV_LABEL "(itf %d): " 5741da177e4SLinus Torvalds "discarding PDU(s) with CRC error\n", 5751da177e4SLinus Torvalds vcc->dev->number); 5761da177e4SLinus Torvalds silence = (jiffies+2*HZ)|1; 5771da177e4SLinus Torvalds } 5781da177e4SLinus Torvalds size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); 5791da177e4SLinus Torvalds EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr, 5801da177e4SLinus Torvalds size); 5811da177e4SLinus Torvalds } 5821da177e4SLinus Torvalds eff = length = 0; 5831da177e4SLinus Torvalds atomic_inc(&vcc->stats->rx_err); 5841da177e4SLinus Torvalds } 5851da177e4SLinus Torvalds else { 5861da177e4SLinus Torvalds size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); 5871da177e4SLinus Torvalds DPRINTK("size=%ld\n",size); 5881da177e4SLinus Torvalds length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) & 5891da177e4SLinus Torvalds (eni_vcc->words-1)))*4) & 0xffff; 5901da177e4SLinus Torvalds /* -trailer(2)+header(1) */ 5911da177e4SLinus Torvalds if (length && length <= (size << 2)-8 && length <= 5921da177e4SLinus Torvalds ATM_MAX_AAL5_PDU) eff = (length+3) >> 2; 5931da177e4SLinus Torvalds else { /* ^ trailer length (8) */ 5941da177e4SLinus Torvalds EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr, 5951da177e4SLinus Torvalds length); 5961da177e4SLinus Torvalds printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU " 5971da177e4SLinus Torvalds "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n", 5981da177e4SLinus Torvalds vcc->dev->number,vcc->vci,length,size << 2,descr); 5991da177e4SLinus Torvalds length = eff = 0; 6001da177e4SLinus Torvalds atomic_inc(&vcc->stats->rx_err); 6011da177e4SLinus Torvalds } 6021da177e4SLinus Torvalds } 6031da177e4SLinus Torvalds skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL; 6041da177e4SLinus Torvalds if (!skb) { 6051da177e4SLinus Torvalds discard(vcc,size); 6061da177e4SLinus Torvalds return 0; 6071da177e4SLinus Torvalds } 6081da177e4SLinus Torvalds skb_put(skb,length); 6091da177e4SLinus Torvalds DPRINTK("got len %ld\n",length); 6101da177e4SLinus Torvalds if (do_rx_dma(vcc,skb,1,size,eff)) return 1; 6111da177e4SLinus Torvalds eni_vcc->rxing++; 6121da177e4SLinus Torvalds return 0; 6131da177e4SLinus Torvalds } 6141da177e4SLinus Torvalds 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds static inline int rx_vcc(struct atm_vcc *vcc) 6171da177e4SLinus Torvalds { 6181da177e4SLinus Torvalds void __iomem *vci_dsc; 6191da177e4SLinus Torvalds unsigned long tmp; 6201da177e4SLinus Torvalds struct eni_vcc *eni_vcc; 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds eni_vcc = ENI_VCC(vcc); 6231da177e4SLinus Torvalds vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16; 6241da177e4SLinus Torvalds EVENT("rx_vcc(1)\n",0,0); 6251da177e4SLinus Torvalds while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >> 6261da177e4SLinus Torvalds MID_VCI_DESCR_SHIFT)) { 6271da177e4SLinus Torvalds EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n", 6281da177e4SLinus Torvalds eni_vcc->descr,tmp); 6291da177e4SLinus Torvalds DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, 6301da177e4SLinus Torvalds (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> 6311da177e4SLinus Torvalds MID_VCI_DESCR_SHIFT)); 6321da177e4SLinus Torvalds if (ENI_VCC(vcc)->rx(vcc)) return 1; 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds /* clear IN_SERVICE flag */ 6351da177e4SLinus Torvalds writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc); 6361da177e4SLinus Torvalds /* 6371da177e4SLinus Torvalds * If new data has arrived between evaluating the while condition and 6381da177e4SLinus Torvalds * clearing IN_SERVICE, we wouldn't be notified until additional data 6391da177e4SLinus Torvalds * follows. So we have to loop again to be sure. 6401da177e4SLinus Torvalds */ 6411da177e4SLinus Torvalds EVENT("rx_vcc(3)\n",0,0); 6421da177e4SLinus Torvalds while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) 6431da177e4SLinus Torvalds >> MID_VCI_DESCR_SHIFT)) { 6441da177e4SLinus Torvalds EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n", 6451da177e4SLinus Torvalds eni_vcc->descr,tmp); 6461da177e4SLinus Torvalds DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, 6471da177e4SLinus Torvalds (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> 6481da177e4SLinus Torvalds MID_VCI_DESCR_SHIFT)); 6491da177e4SLinus Torvalds if (ENI_VCC(vcc)->rx(vcc)) return 1; 6501da177e4SLinus Torvalds } 6511da177e4SLinus Torvalds return 0; 6521da177e4SLinus Torvalds } 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds 6551da177e4SLinus Torvalds static void poll_rx(struct atm_dev *dev) 6561da177e4SLinus Torvalds { 6571da177e4SLinus Torvalds struct eni_dev *eni_dev; 6581da177e4SLinus Torvalds struct atm_vcc *curr; 6591da177e4SLinus Torvalds 6601da177e4SLinus Torvalds eni_dev = ENI_DEV(dev); 6611da177e4SLinus Torvalds while ((curr = eni_dev->fast)) { 6621da177e4SLinus Torvalds EVENT("poll_rx.fast\n",0,0); 6631da177e4SLinus Torvalds if (rx_vcc(curr)) return; 6641da177e4SLinus Torvalds eni_dev->fast = ENI_VCC(curr)->next; 6651da177e4SLinus Torvalds ENI_VCC(curr)->next = ENI_VCC_NOS; 6661da177e4SLinus Torvalds barrier(); 6671da177e4SLinus Torvalds ENI_VCC(curr)->servicing--; 6681da177e4SLinus Torvalds } 6691da177e4SLinus Torvalds while ((curr = eni_dev->slow)) { 6701da177e4SLinus Torvalds EVENT("poll_rx.slow\n",0,0); 6711da177e4SLinus Torvalds if (rx_vcc(curr)) return; 6721da177e4SLinus Torvalds eni_dev->slow = ENI_VCC(curr)->next; 6731da177e4SLinus Torvalds ENI_VCC(curr)->next = ENI_VCC_NOS; 6741da177e4SLinus Torvalds barrier(); 6751da177e4SLinus Torvalds ENI_VCC(curr)->servicing--; 6761da177e4SLinus Torvalds } 6771da177e4SLinus Torvalds } 6781da177e4SLinus Torvalds 6791da177e4SLinus Torvalds 6801da177e4SLinus Torvalds static void get_service(struct atm_dev *dev) 6811da177e4SLinus Torvalds { 6821da177e4SLinus Torvalds struct eni_dev *eni_dev; 6831da177e4SLinus Torvalds struct atm_vcc *vcc; 6841da177e4SLinus Torvalds unsigned long vci; 6851da177e4SLinus Torvalds 6861da177e4SLinus Torvalds DPRINTK(">get_service\n"); 6871da177e4SLinus Torvalds eni_dev = ENI_DEV(dev); 6881da177e4SLinus Torvalds while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) { 6891da177e4SLinus Torvalds vci = readl(eni_dev->service+eni_dev->serv_read*4); 6901da177e4SLinus Torvalds eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1); 6911da177e4SLinus Torvalds vcc = eni_dev->rx_map[vci & 1023]; 6921da177e4SLinus Torvalds if (!vcc) { 6931da177e4SLinus Torvalds printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not " 6941da177e4SLinus Torvalds "found\n",dev->number,vci); 6951da177e4SLinus Torvalds continue; /* nasty but we try to go on anyway */ 6961da177e4SLinus Torvalds /* @@@ nope, doesn't work */ 6971da177e4SLinus Torvalds } 6981da177e4SLinus Torvalds EVENT("getting from service\n",0,0); 6991da177e4SLinus Torvalds if (ENI_VCC(vcc)->next != ENI_VCC_NOS) { 7001da177e4SLinus Torvalds EVENT("double service\n",0,0); 7011da177e4SLinus Torvalds DPRINTK("Grr, servicing VCC %ld twice\n",vci); 7021da177e4SLinus Torvalds continue; 7031da177e4SLinus Torvalds } 7041da177e4SLinus Torvalds do_gettimeofday(&ENI_VCC(vcc)->timestamp); 7051da177e4SLinus Torvalds ENI_VCC(vcc)->next = NULL; 7061da177e4SLinus Torvalds if (vcc->qos.rxtp.traffic_class == ATM_CBR) { 7071da177e4SLinus Torvalds if (eni_dev->fast) 7081da177e4SLinus Torvalds ENI_VCC(eni_dev->last_fast)->next = vcc; 7091da177e4SLinus Torvalds else eni_dev->fast = vcc; 7101da177e4SLinus Torvalds eni_dev->last_fast = vcc; 7111da177e4SLinus Torvalds } 7121da177e4SLinus Torvalds else { 7131da177e4SLinus Torvalds if (eni_dev->slow) 7141da177e4SLinus Torvalds ENI_VCC(eni_dev->last_slow)->next = vcc; 7151da177e4SLinus Torvalds else eni_dev->slow = vcc; 7161da177e4SLinus Torvalds eni_dev->last_slow = vcc; 7171da177e4SLinus Torvalds } 7181da177e4SLinus Torvalds putting++; 7191da177e4SLinus Torvalds ENI_VCC(vcc)->servicing++; 7201da177e4SLinus Torvalds } 7211da177e4SLinus Torvalds } 7221da177e4SLinus Torvalds 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds static void dequeue_rx(struct atm_dev *dev) 7251da177e4SLinus Torvalds { 7261da177e4SLinus Torvalds struct eni_dev *eni_dev; 7271da177e4SLinus Torvalds struct eni_vcc *eni_vcc; 7281da177e4SLinus Torvalds struct atm_vcc *vcc; 7291da177e4SLinus Torvalds struct sk_buff *skb; 7301da177e4SLinus Torvalds void __iomem *vci_dsc; 7311da177e4SLinus Torvalds int first; 7321da177e4SLinus Torvalds 7331da177e4SLinus Torvalds eni_dev = ENI_DEV(dev); 7341da177e4SLinus Torvalds first = 1; 7351da177e4SLinus Torvalds while (1) { 7361da177e4SLinus Torvalds skb = skb_dequeue(&eni_dev->rx_queue); 7371da177e4SLinus Torvalds if (!skb) { 7381da177e4SLinus Torvalds if (first) { 7391da177e4SLinus Torvalds DPRINTK(DEV_LABEL "(itf %d): RX but not " 7401da177e4SLinus Torvalds "rxing\n",dev->number); 7411da177e4SLinus Torvalds EVENT("nothing to dequeue\n",0,0); 7421da177e4SLinus Torvalds } 7431da177e4SLinus Torvalds break; 7441da177e4SLinus Torvalds } 7451da177e4SLinus Torvalds EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb), 7461da177e4SLinus Torvalds ENI_PRV_POS(skb)); 7471da177e4SLinus Torvalds rx_dequeued++; 7481da177e4SLinus Torvalds vcc = ATM_SKB(skb)->vcc; 7491da177e4SLinus Torvalds eni_vcc = ENI_VCC(vcc); 7501da177e4SLinus Torvalds first = 0; 7511da177e4SLinus Torvalds vci_dsc = eni_dev->vci+vcc->vci*16; 7521da177e4SLinus Torvalds if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb), 7531da177e4SLinus Torvalds (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT, 7541da177e4SLinus Torvalds eni_vcc->words)) { 7551da177e4SLinus Torvalds EVENT("requeuing\n",0,0); 7561da177e4SLinus Torvalds skb_queue_head(&eni_dev->rx_queue,skb); 7571da177e4SLinus Torvalds break; 7581da177e4SLinus Torvalds } 7591da177e4SLinus Torvalds eni_vcc->rxing--; 7601da177e4SLinus Torvalds eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1); 7611da177e4SLinus Torvalds pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len, 7621da177e4SLinus Torvalds PCI_DMA_TODEVICE); 7631da177e4SLinus Torvalds if (!skb->len) dev_kfree_skb_irq(skb); 7641da177e4SLinus Torvalds else { 7651da177e4SLinus Torvalds EVENT("pushing (len=%ld)\n",skb->len,0); 7661da177e4SLinus Torvalds if (vcc->qos.aal == ATM_AAL0) 7671da177e4SLinus Torvalds *(unsigned long *) skb->data = 7681da177e4SLinus Torvalds ntohl(*(unsigned long *) skb->data); 7691da177e4SLinus Torvalds memset(skb->cb,0,sizeof(struct eni_skb_prv)); 7701da177e4SLinus Torvalds vcc->push(vcc,skb); 7711da177e4SLinus Torvalds pushed++; 7721da177e4SLinus Torvalds } 7731da177e4SLinus Torvalds atomic_inc(&vcc->stats->rx); 7741da177e4SLinus Torvalds } 7751da177e4SLinus Torvalds wake_up(&eni_dev->rx_wait); 7761da177e4SLinus Torvalds } 7771da177e4SLinus Torvalds 7781da177e4SLinus Torvalds 7791da177e4SLinus Torvalds static int open_rx_first(struct atm_vcc *vcc) 7801da177e4SLinus Torvalds { 7811da177e4SLinus Torvalds struct eni_dev *eni_dev; 7821da177e4SLinus Torvalds struct eni_vcc *eni_vcc; 7831da177e4SLinus Torvalds unsigned long size; 7841da177e4SLinus Torvalds 7851da177e4SLinus Torvalds DPRINTK("open_rx_first\n"); 7861da177e4SLinus Torvalds eni_dev = ENI_DEV(vcc->dev); 7871da177e4SLinus Torvalds eni_vcc = ENI_VCC(vcc); 7881da177e4SLinus Torvalds eni_vcc->rx = NULL; 7891da177e4SLinus Torvalds if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0; 7901da177e4SLinus Torvalds size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100; 7911da177e4SLinus Torvalds if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <= 7921da177e4SLinus Torvalds MID_MAX_BUF_SIZE) 7931da177e4SLinus Torvalds size = MID_MAX_BUF_SIZE; 7941da177e4SLinus Torvalds eni_vcc->recv = eni_alloc_mem(eni_dev,&size); 7951da177e4SLinus Torvalds DPRINTK("rx at 0x%lx\n",eni_vcc->recv); 7961da177e4SLinus Torvalds eni_vcc->words = size >> 2; 7971da177e4SLinus Torvalds if (!eni_vcc->recv) return -ENOBUFS; 7981da177e4SLinus Torvalds eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0; 7991da177e4SLinus Torvalds eni_vcc->descr = 0; 8001da177e4SLinus Torvalds eni_vcc->rx_pos = 0; 8011da177e4SLinus Torvalds eni_vcc->rxing = 0; 8021da177e4SLinus Torvalds eni_vcc->servicing = 0; 8031da177e4SLinus Torvalds eni_vcc->next = ENI_VCC_NOS; 8041da177e4SLinus Torvalds return 0; 8051da177e4SLinus Torvalds } 8061da177e4SLinus Torvalds 8071da177e4SLinus Torvalds 8081da177e4SLinus Torvalds static int open_rx_second(struct atm_vcc *vcc) 8091da177e4SLinus Torvalds { 8101da177e4SLinus Torvalds void __iomem *here; 8111da177e4SLinus Torvalds struct eni_dev *eni_dev; 8121da177e4SLinus Torvalds struct eni_vcc *eni_vcc; 8131da177e4SLinus Torvalds unsigned long size; 8141da177e4SLinus Torvalds int order; 8151da177e4SLinus Torvalds 8161da177e4SLinus Torvalds DPRINTK("open_rx_second\n"); 8171da177e4SLinus Torvalds eni_dev = ENI_DEV(vcc->dev); 8181da177e4SLinus Torvalds eni_vcc = ENI_VCC(vcc); 8191da177e4SLinus Torvalds if (!eni_vcc->rx) return 0; 8201da177e4SLinus Torvalds /* set up VCI descriptor */ 8211da177e4SLinus Torvalds here = eni_dev->vci+vcc->vci*16; 8221da177e4SLinus Torvalds DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4); 8231da177e4SLinus Torvalds size = eni_vcc->words >> 8; 8241da177e4SLinus Torvalds for (order = -1; size; order++) size >>= 1; 8251da177e4SLinus Torvalds writel(0,here+4); /* descr, read = 0 */ 8261da177e4SLinus Torvalds writel(0,here+8); /* write, state, count = 0 */ 8271da177e4SLinus Torvalds if (eni_dev->rx_map[vcc->vci]) 8281da177e4SLinus Torvalds printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already " 8291da177e4SLinus Torvalds "in use\n",vcc->dev->number,vcc->vci); 8301da177e4SLinus Torvalds eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */ 8311da177e4SLinus Torvalds writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) << 8321da177e4SLinus Torvalds MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE | 8331da177e4SLinus Torvalds (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) << 8341da177e4SLinus Torvalds MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here); 8351da177e4SLinus Torvalds return 0; 8361da177e4SLinus Torvalds } 8371da177e4SLinus Torvalds 8381da177e4SLinus Torvalds 8391da177e4SLinus Torvalds static void close_rx(struct atm_vcc *vcc) 8401da177e4SLinus Torvalds { 8411da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait,current); 8421da177e4SLinus Torvalds void __iomem *here; 8431da177e4SLinus Torvalds struct eni_dev *eni_dev; 8441da177e4SLinus Torvalds struct eni_vcc *eni_vcc; 8451da177e4SLinus Torvalds 8461da177e4SLinus Torvalds eni_vcc = ENI_VCC(vcc); 8471da177e4SLinus Torvalds if (!eni_vcc->rx) return; 8481da177e4SLinus Torvalds eni_dev = ENI_DEV(vcc->dev); 8491da177e4SLinus Torvalds if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) { 8501da177e4SLinus Torvalds here = eni_dev->vci+vcc->vci*16; 8511da177e4SLinus Torvalds /* block receiver */ 8521da177e4SLinus Torvalds writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH << 8531da177e4SLinus Torvalds MID_VCI_MODE_SHIFT),here); 8541da177e4SLinus Torvalds /* wait for receiver to become idle */ 8551da177e4SLinus Torvalds udelay(27); 8561da177e4SLinus Torvalds /* discard pending cell */ 8571da177e4SLinus Torvalds writel(readl(here) & ~MID_VCI_IN_SERVICE,here); 8581da177e4SLinus Torvalds /* don't accept any new ones */ 8591da177e4SLinus Torvalds eni_dev->rx_map[vcc->vci] = NULL; 8601da177e4SLinus Torvalds /* wait for RX queue to drain */ 8611da177e4SLinus Torvalds DPRINTK("eni_close: waiting for RX ...\n"); 8621da177e4SLinus Torvalds EVENT("RX closing\n",0,0); 8631da177e4SLinus Torvalds add_wait_queue(&eni_dev->rx_wait,&wait); 8641da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 8651da177e4SLinus Torvalds barrier(); 8661da177e4SLinus Torvalds for (;;) { 8671da177e4SLinus Torvalds /* transition service->rx: rxing++, servicing-- */ 8681da177e4SLinus Torvalds if (!eni_vcc->servicing) { 8691da177e4SLinus Torvalds barrier(); 8701da177e4SLinus Torvalds if (!eni_vcc->rxing) break; 8711da177e4SLinus Torvalds } 8721da177e4SLinus Torvalds EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing, 8731da177e4SLinus Torvalds eni_vcc->servicing); 8741da177e4SLinus Torvalds printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing, 8751da177e4SLinus Torvalds eni_vcc->rxing); 8761da177e4SLinus Torvalds schedule(); 8771da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 8781da177e4SLinus Torvalds } 8791da177e4SLinus Torvalds for (;;) { 8801da177e4SLinus Torvalds int at_end; 8811da177e4SLinus Torvalds u32 tmp; 8821da177e4SLinus Torvalds 8831da177e4SLinus Torvalds tasklet_disable(&eni_dev->task); 8841da177e4SLinus Torvalds tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ; 8851da177e4SLinus Torvalds at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT; 8861da177e4SLinus Torvalds tasklet_enable(&eni_dev->task); 8871da177e4SLinus Torvalds if (at_end) break; 8881da177e4SLinus Torvalds EVENT("drain discard (host 0x%lx, nic 0x%lx)\n", 8891da177e4SLinus Torvalds eni_vcc->rx_pos,tmp); 8901da177e4SLinus Torvalds printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n", 8911da177e4SLinus Torvalds eni_vcc->rx_pos,tmp); 8921da177e4SLinus Torvalds schedule(); 8931da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 8941da177e4SLinus Torvalds } 8951da177e4SLinus Torvalds set_current_state(TASK_RUNNING); 8961da177e4SLinus Torvalds remove_wait_queue(&eni_dev->rx_wait,&wait); 8971da177e4SLinus Torvalds } 8981da177e4SLinus Torvalds eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2); 8991da177e4SLinus Torvalds eni_vcc->rx = NULL; 9001da177e4SLinus Torvalds } 9011da177e4SLinus Torvalds 9021da177e4SLinus Torvalds 9031da177e4SLinus Torvalds static int start_rx(struct atm_dev *dev) 9041da177e4SLinus Torvalds { 9051da177e4SLinus Torvalds struct eni_dev *eni_dev; 9061da177e4SLinus Torvalds 9071da177e4SLinus Torvalds eni_dev = ENI_DEV(dev); 9081da177e4SLinus Torvalds eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL); 9091da177e4SLinus Torvalds if (!eni_dev->rx_map) { 9101da177e4SLinus Torvalds printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 9111da177e4SLinus Torvalds dev->number); 9121da177e4SLinus Torvalds free_page((unsigned long) eni_dev->free_list); 9131da177e4SLinus Torvalds return -ENOMEM; 9141da177e4SLinus Torvalds } 9151da177e4SLinus Torvalds memset(eni_dev->rx_map,0,PAGE_SIZE); 9161da177e4SLinus Torvalds eni_dev->rx_mult = DEFAULT_RX_MULT; 9171da177e4SLinus Torvalds eni_dev->fast = eni_dev->last_fast = NULL; 9181da177e4SLinus Torvalds eni_dev->slow = eni_dev->last_slow = NULL; 9191da177e4SLinus Torvalds init_waitqueue_head(&eni_dev->rx_wait); 9201da177e4SLinus Torvalds skb_queue_head_init(&eni_dev->rx_queue); 9211da177e4SLinus Torvalds eni_dev->serv_read = eni_in(MID_SERV_WRITE); 9221da177e4SLinus Torvalds eni_out(0,MID_DMA_WR_RX); 9231da177e4SLinus Torvalds return 0; 9241da177e4SLinus Torvalds } 9251da177e4SLinus Torvalds 9261da177e4SLinus Torvalds 9271da177e4SLinus Torvalds /*----------------------------------- TX ------------------------------------*/ 9281da177e4SLinus Torvalds 9291da177e4SLinus Torvalds 9301da177e4SLinus Torvalds enum enq_res { enq_ok,enq_next,enq_jam }; 9311da177e4SLinus Torvalds 9321da177e4SLinus Torvalds 9331da177e4SLinus Torvalds static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr, 9341da177e4SLinus Torvalds u32 size) 9351da177e4SLinus Torvalds { 9361da177e4SLinus Torvalds u32 init,words; 9371da177e4SLinus Torvalds 9381da177e4SLinus Torvalds DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size); 9391da177e4SLinus Torvalds EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size); 9401da177e4SLinus Torvalds #if 0 /* don't complain anymore */ 9411da177e4SLinus Torvalds if (paddr & 3) 9421da177e4SLinus Torvalds printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr); 9431da177e4SLinus Torvalds if (size & 3) 9441da177e4SLinus Torvalds printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size); 9451da177e4SLinus Torvalds #endif 9461da177e4SLinus Torvalds if (paddr & 3) { 9471da177e4SLinus Torvalds init = 4-(paddr & 3); 9481da177e4SLinus Torvalds if (init > size || size < 7) init = size; 9491da177e4SLinus Torvalds DPRINTK("put_dma: %lx DMA: %d/%d bytes\n", 9501da177e4SLinus Torvalds (unsigned long) paddr,init,size); 9511da177e4SLinus Torvalds dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) | 9521da177e4SLinus Torvalds (chan << MID_DMA_CHAN_SHIFT); 9531da177e4SLinus Torvalds dma[(*j)++] = paddr; 9541da177e4SLinus Torvalds paddr += init; 9551da177e4SLinus Torvalds size -= init; 9561da177e4SLinus Torvalds } 9571da177e4SLinus Torvalds words = size >> 2; 9581da177e4SLinus Torvalds size &= 3; 9591da177e4SLinus Torvalds if (words && (paddr & 31)) { 9601da177e4SLinus Torvalds init = 8-((paddr & 31) >> 2); 9611da177e4SLinus Torvalds if (init > words) init = words; 9621da177e4SLinus Torvalds DPRINTK("put_dma: %lx DMA: %d/%d words\n", 9631da177e4SLinus Torvalds (unsigned long) paddr,init,words); 9641da177e4SLinus Torvalds dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 9651da177e4SLinus Torvalds (chan << MID_DMA_CHAN_SHIFT); 9661da177e4SLinus Torvalds dma[(*j)++] = paddr; 9671da177e4SLinus Torvalds paddr += init << 2; 9681da177e4SLinus Torvalds words -= init; 9691da177e4SLinus Torvalds } 9701da177e4SLinus Torvalds #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */ 9711da177e4SLinus Torvalds if (words & ~15) { 9721da177e4SLinus Torvalds DPRINTK("put_dma: %lx DMA: %d*16/%d words\n", 9731da177e4SLinus Torvalds (unsigned long) paddr,words >> 4,words); 9741da177e4SLinus Torvalds dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT) 9751da177e4SLinus Torvalds | (chan << MID_DMA_CHAN_SHIFT); 9761da177e4SLinus Torvalds dma[(*j)++] = paddr; 9771da177e4SLinus Torvalds paddr += (words & ~15) << 2; 9781da177e4SLinus Torvalds words &= 15; 9791da177e4SLinus Torvalds } 9801da177e4SLinus Torvalds #endif 9811da177e4SLinus Torvalds #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */ 9821da177e4SLinus Torvalds if (words & ~7) { 9831da177e4SLinus Torvalds DPRINTK("put_dma: %lx DMA: %d*8/%d words\n", 9841da177e4SLinus Torvalds (unsigned long) paddr,words >> 3,words); 9851da177e4SLinus Torvalds dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT) 9861da177e4SLinus Torvalds | (chan << MID_DMA_CHAN_SHIFT); 9871da177e4SLinus Torvalds dma[(*j)++] = paddr; 9881da177e4SLinus Torvalds paddr += (words & ~7) << 2; 9891da177e4SLinus Torvalds words &= 7; 9901da177e4SLinus Torvalds } 9911da177e4SLinus Torvalds #endif 9921da177e4SLinus Torvalds #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */ 9931da177e4SLinus Torvalds if (words & ~3) { 9941da177e4SLinus Torvalds DPRINTK("put_dma: %lx DMA: %d*4/%d words\n", 9951da177e4SLinus Torvalds (unsigned long) paddr,words >> 2,words); 9961da177e4SLinus Torvalds dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT) 9971da177e4SLinus Torvalds | (chan << MID_DMA_CHAN_SHIFT); 9981da177e4SLinus Torvalds dma[(*j)++] = paddr; 9991da177e4SLinus Torvalds paddr += (words & ~3) << 2; 10001da177e4SLinus Torvalds words &= 3; 10011da177e4SLinus Torvalds } 10021da177e4SLinus Torvalds #endif 10031da177e4SLinus Torvalds #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */ 10041da177e4SLinus Torvalds if (words & ~1) { 10051da177e4SLinus Torvalds DPRINTK("put_dma: %lx DMA: %d*2/%d words\n", 10061da177e4SLinus Torvalds (unsigned long) paddr,words >> 1,words); 10071da177e4SLinus Torvalds dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT) 10081da177e4SLinus Torvalds | (chan << MID_DMA_CHAN_SHIFT); 10091da177e4SLinus Torvalds dma[(*j)++] = paddr; 10101da177e4SLinus Torvalds paddr += (words & ~1) << 2; 10111da177e4SLinus Torvalds words &= 1; 10121da177e4SLinus Torvalds } 10131da177e4SLinus Torvalds #endif 10141da177e4SLinus Torvalds if (words) { 10151da177e4SLinus Torvalds DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr, 10161da177e4SLinus Torvalds words); 10171da177e4SLinus Torvalds dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) | 10181da177e4SLinus Torvalds (chan << MID_DMA_CHAN_SHIFT); 10191da177e4SLinus Torvalds dma[(*j)++] = paddr; 10201da177e4SLinus Torvalds paddr += words << 2; 10211da177e4SLinus Torvalds } 10221da177e4SLinus Torvalds if (size) { 10231da177e4SLinus Torvalds DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr, 10241da177e4SLinus Torvalds size); 10251da177e4SLinus Torvalds dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) | 10261da177e4SLinus Torvalds (chan << MID_DMA_CHAN_SHIFT); 10271da177e4SLinus Torvalds dma[(*j)++] = paddr; 10281da177e4SLinus Torvalds } 10291da177e4SLinus Torvalds } 10301da177e4SLinus Torvalds 10311da177e4SLinus Torvalds 10321da177e4SLinus Torvalds static enum enq_res do_tx(struct sk_buff *skb) 10331da177e4SLinus Torvalds { 10341da177e4SLinus Torvalds struct atm_vcc *vcc; 10351da177e4SLinus Torvalds struct eni_dev *eni_dev; 10361da177e4SLinus Torvalds struct eni_vcc *eni_vcc; 10371da177e4SLinus Torvalds struct eni_tx *tx; 10381da177e4SLinus Torvalds dma_addr_t paddr; 10391da177e4SLinus Torvalds u32 dma_rd,dma_wr; 10401da177e4SLinus Torvalds u32 size; /* in words */ 10411da177e4SLinus Torvalds int aal5,dma_size,i,j; 10421da177e4SLinus Torvalds 10431da177e4SLinus Torvalds DPRINTK(">do_tx\n"); 10441da177e4SLinus Torvalds NULLCHECK(skb); 10451da177e4SLinus Torvalds EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len); 10461da177e4SLinus Torvalds vcc = ATM_SKB(skb)->vcc; 10471da177e4SLinus Torvalds NULLCHECK(vcc); 10481da177e4SLinus Torvalds eni_dev = ENI_DEV(vcc->dev); 10491da177e4SLinus Torvalds NULLCHECK(eni_dev); 10501da177e4SLinus Torvalds eni_vcc = ENI_VCC(vcc); 10511da177e4SLinus Torvalds tx = eni_vcc->tx; 10521da177e4SLinus Torvalds NULLCHECK(tx); 10531da177e4SLinus Torvalds #if 0 /* Enable this for testing with the "align" program */ 10541da177e4SLinus Torvalds { 10551da177e4SLinus Torvalds unsigned int hack = *((char *) skb->data)-'0'; 10561da177e4SLinus Torvalds 10571da177e4SLinus Torvalds if (hack < 8) { 10581da177e4SLinus Torvalds skb->data += hack; 10591da177e4SLinus Torvalds skb->len -= hack; 10601da177e4SLinus Torvalds } 10611da177e4SLinus Torvalds } 10621da177e4SLinus Torvalds #endif 10631da177e4SLinus Torvalds #if 0 /* should work now */ 10641da177e4SLinus Torvalds if ((unsigned long) skb->data & 3) 10651da177e4SLinus Torvalds printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned " 10661da177e4SLinus Torvalds "TX data\n",vcc->dev->number,vcc->vci); 10671da177e4SLinus Torvalds #endif 10681da177e4SLinus Torvalds /* 10691da177e4SLinus Torvalds * Potential future IP speedup: make hard_header big enough to put 10701da177e4SLinus Torvalds * segmentation descriptor directly into PDU. Saves: 4 slave writes, 10711da177e4SLinus Torvalds * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-) 10721da177e4SLinus Torvalds */ 10731da177e4SLinus Torvalds 10741da177e4SLinus Torvalds aal5 = vcc->qos.aal == ATM_AAL5; 10751da177e4SLinus Torvalds /* check space in buffer */ 10761da177e4SLinus Torvalds if (!aal5) 10771da177e4SLinus Torvalds size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE; 10781da177e4SLinus Torvalds /* cell without HEC plus segmentation header (includes 10791da177e4SLinus Torvalds four-byte cell header) */ 10801da177e4SLinus Torvalds else { 10811da177e4SLinus Torvalds size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1; 10821da177e4SLinus Torvalds /* add AAL5 trailer */ 10831da177e4SLinus Torvalds size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE; 10841da177e4SLinus Torvalds /* add segmentation header */ 10851da177e4SLinus Torvalds } 10861da177e4SLinus Torvalds /* 10871da177e4SLinus Torvalds * Can I move tx_pos by size bytes without getting closer than TX_GAP 10881da177e4SLinus Torvalds * to the read pointer ? TX_GAP means to leave some space for what 10891da177e4SLinus Torvalds * the manual calls "too close". 10901da177e4SLinus Torvalds */ 10911da177e4SLinus Torvalds if (!NEPMOK(tx->tx_pos,size+TX_GAP, 10921da177e4SLinus Torvalds eni_in(MID_TX_RDPTR(tx->index)),tx->words)) { 10931da177e4SLinus Torvalds DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n", 10941da177e4SLinus Torvalds vcc->dev->number,size); 10951da177e4SLinus Torvalds return enq_next; 10961da177e4SLinus Torvalds } 10971da177e4SLinus Torvalds /* check DMA */ 10981da177e4SLinus Torvalds dma_wr = eni_in(MID_DMA_WR_TX); 10991da177e4SLinus Torvalds dma_rd = eni_in(MID_DMA_RD_TX); 11001da177e4SLinus Torvalds dma_size = 3; /* JK for descriptor and final fill, plus final size 11011da177e4SLinus Torvalds mis-alignment fix */ 11021da177e4SLinus Torvalds DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags); 11031da177e4SLinus Torvalds if (!skb_shinfo(skb)->nr_frags) dma_size += 5; 11041da177e4SLinus Torvalds else dma_size += 5*(skb_shinfo(skb)->nr_frags+1); 11051da177e4SLinus Torvalds if (dma_size > TX_DMA_BUF) { 11061da177e4SLinus Torvalds printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries " 11071da177e4SLinus Torvalds "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF); 11081da177e4SLinus Torvalds } 11091da177e4SLinus Torvalds DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos); 11101da177e4SLinus Torvalds if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) < 11111da177e4SLinus Torvalds dma_size) { 11121da177e4SLinus Torvalds printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n", 11131da177e4SLinus Torvalds vcc->dev->number); 11141da177e4SLinus Torvalds return enq_jam; 11151da177e4SLinus Torvalds } 11161da177e4SLinus Torvalds paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len, 11171da177e4SLinus Torvalds PCI_DMA_TODEVICE); 11181da177e4SLinus Torvalds ENI_PRV_PADDR(skb) = paddr; 11191da177e4SLinus Torvalds /* prepare DMA queue entries */ 11201da177e4SLinus Torvalds j = 0; 11211da177e4SLinus Torvalds eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) << 11221da177e4SLinus Torvalds MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 11231da177e4SLinus Torvalds MID_DT_JK; 11241da177e4SLinus Torvalds j++; 11251da177e4SLinus Torvalds if (!skb_shinfo(skb)->nr_frags) 11261da177e4SLinus Torvalds if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len); 11271da177e4SLinus Torvalds else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4); 11281da177e4SLinus Torvalds else { 11291da177e4SLinus Torvalds DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */ 11301da177e4SLinus Torvalds for (i = -1; i < skb_shinfo(skb)->nr_frags; i++) 11311da177e4SLinus Torvalds if (i == -1) 11321da177e4SLinus Torvalds put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 11331da177e4SLinus Torvalds skb->data, 11341da177e4SLinus Torvalds skb->len - skb->data_len); 11351da177e4SLinus Torvalds else 11361da177e4SLinus Torvalds put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 11371da177e4SLinus Torvalds skb_shinfo(skb)->frags[i].page + skb_shinfo(skb)->frags[i].page_offset, 11381da177e4SLinus Torvalds skb_shinfo(skb)->frags[i].size); 11391da177e4SLinus Torvalds } 11401da177e4SLinus Torvalds if (skb->len & 3) 11411da177e4SLinus Torvalds put_dma(tx->index,eni_dev->dma,&j,zeroes,4-(skb->len & 3)); 11421da177e4SLinus Torvalds /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */ 11431da177e4SLinus Torvalds eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) << 11441da177e4SLinus Torvalds MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 11451da177e4SLinus Torvalds MID_DMA_END | MID_DT_JK; 11461da177e4SLinus Torvalds j++; 11471da177e4SLinus Torvalds DPRINTK("DMA at end: %d\n",j); 11481da177e4SLinus Torvalds /* store frame */ 11491da177e4SLinus Torvalds writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) | 11501da177e4SLinus Torvalds (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) | 11511da177e4SLinus Torvalds (tx->resolution << MID_SEG_RATE_SHIFT) | 11521da177e4SLinus Torvalds (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4); 11531da177e4SLinus Torvalds /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/ 11541da177e4SLinus Torvalds writel((vcc->vci << MID_SEG_VCI_SHIFT) | 11551da177e4SLinus Torvalds (aal5 ? 0 : (skb->data[3] & 0xf)) | 11561da177e4SLinus Torvalds (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0), 11571da177e4SLinus Torvalds tx->send+((tx->tx_pos+1) & (tx->words-1))*4); 11581da177e4SLinus Torvalds DPRINTK("size: %d, len:%d\n",size,skb->len); 11591da177e4SLinus Torvalds if (aal5) 11601da177e4SLinus Torvalds writel(skb->len,tx->send+ 11611da177e4SLinus Torvalds ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4); 11621da177e4SLinus Torvalds j = j >> 1; 11631da177e4SLinus Torvalds for (i = 0; i < j; i++) { 11641da177e4SLinus Torvalds writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8); 11651da177e4SLinus Torvalds writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4); 11661da177e4SLinus Torvalds dma_wr = (dma_wr+1) & (NR_DMA_TX-1); 11671da177e4SLinus Torvalds } 11681da177e4SLinus Torvalds ENI_PRV_POS(skb) = tx->tx_pos; 11691da177e4SLinus Torvalds ENI_PRV_SIZE(skb) = size; 11701da177e4SLinus Torvalds ENI_VCC(vcc)->txing += size; 11711da177e4SLinus Torvalds tx->tx_pos = (tx->tx_pos+size) & (tx->words-1); 11721da177e4SLinus Torvalds DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos); 11731da177e4SLinus Torvalds eni_out(dma_wr,MID_DMA_WR_TX); 11741da177e4SLinus Torvalds skb_queue_tail(&eni_dev->tx_queue,skb); 11751da177e4SLinus Torvalds queued++; 11761da177e4SLinus Torvalds return enq_ok; 11771da177e4SLinus Torvalds } 11781da177e4SLinus Torvalds 11791da177e4SLinus Torvalds 11801da177e4SLinus Torvalds static void poll_tx(struct atm_dev *dev) 11811da177e4SLinus Torvalds { 11821da177e4SLinus Torvalds struct eni_tx *tx; 11831da177e4SLinus Torvalds struct sk_buff *skb; 11841da177e4SLinus Torvalds enum enq_res res; 11851da177e4SLinus Torvalds int i; 11861da177e4SLinus Torvalds 11871da177e4SLinus Torvalds DPRINTK(">poll_tx\n"); 11881da177e4SLinus Torvalds for (i = NR_CHAN-1; i >= 0; i--) { 11891da177e4SLinus Torvalds tx = &ENI_DEV(dev)->tx[i]; 11901da177e4SLinus Torvalds if (tx->send) 11911da177e4SLinus Torvalds while ((skb = skb_dequeue(&tx->backlog))) { 11921da177e4SLinus Torvalds res = do_tx(skb); 11931da177e4SLinus Torvalds if (res == enq_ok) continue; 11941da177e4SLinus Torvalds DPRINTK("re-queuing TX PDU\n"); 11951da177e4SLinus Torvalds skb_queue_head(&tx->backlog,skb); 11961da177e4SLinus Torvalds requeued++; 11971da177e4SLinus Torvalds if (res == enq_jam) return; 11981da177e4SLinus Torvalds break; 11991da177e4SLinus Torvalds } 12001da177e4SLinus Torvalds } 12011da177e4SLinus Torvalds } 12021da177e4SLinus Torvalds 12031da177e4SLinus Torvalds 12041da177e4SLinus Torvalds static void dequeue_tx(struct atm_dev *dev) 12051da177e4SLinus Torvalds { 12061da177e4SLinus Torvalds struct eni_dev *eni_dev; 12071da177e4SLinus Torvalds struct atm_vcc *vcc; 12081da177e4SLinus Torvalds struct sk_buff *skb; 12091da177e4SLinus Torvalds struct eni_tx *tx; 12101da177e4SLinus Torvalds 12111da177e4SLinus Torvalds NULLCHECK(dev); 12121da177e4SLinus Torvalds eni_dev = ENI_DEV(dev); 12131da177e4SLinus Torvalds NULLCHECK(eni_dev); 12141da177e4SLinus Torvalds while ((skb = skb_dequeue(&eni_dev->tx_queue))) { 12151da177e4SLinus Torvalds vcc = ATM_SKB(skb)->vcc; 12161da177e4SLinus Torvalds NULLCHECK(vcc); 12171da177e4SLinus Torvalds tx = ENI_VCC(vcc)->tx; 12181da177e4SLinus Torvalds NULLCHECK(ENI_VCC(vcc)->tx); 12191da177e4SLinus Torvalds DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb), 12201da177e4SLinus Torvalds (unsigned) eni_in(MID_TX_DESCRSTART(tx->index))); 12211da177e4SLinus Torvalds if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) == 12221da177e4SLinus Torvalds eni_in(MID_TX_DESCRSTART(tx->index))) { 12231da177e4SLinus Torvalds skb_queue_head(&eni_dev->tx_queue,skb); 12241da177e4SLinus Torvalds break; 12251da177e4SLinus Torvalds } 12261da177e4SLinus Torvalds ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb); 12271da177e4SLinus Torvalds pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len, 12281da177e4SLinus Torvalds PCI_DMA_TODEVICE); 12291da177e4SLinus Torvalds if (vcc->pop) vcc->pop(vcc,skb); 12301da177e4SLinus Torvalds else dev_kfree_skb_irq(skb); 12311da177e4SLinus Torvalds atomic_inc(&vcc->stats->tx); 12321da177e4SLinus Torvalds wake_up(&eni_dev->tx_wait); 12331da177e4SLinus Torvalds dma_complete++; 12341da177e4SLinus Torvalds } 12351da177e4SLinus Torvalds } 12361da177e4SLinus Torvalds 12371da177e4SLinus Torvalds 12381da177e4SLinus Torvalds static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr) 12391da177e4SLinus Torvalds { 12401da177e4SLinus Torvalds int i; 12411da177e4SLinus Torvalds 12421da177e4SLinus Torvalds for (i = !ubr; i < NR_CHAN; i++) 12431da177e4SLinus Torvalds if (!eni_dev->tx[i].send) return eni_dev->tx+i; 12441da177e4SLinus Torvalds return NULL; 12451da177e4SLinus Torvalds } 12461da177e4SLinus Torvalds 12471da177e4SLinus Torvalds 12481da177e4SLinus Torvalds static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre, 12491da177e4SLinus Torvalds int *res,int unlimited) 12501da177e4SLinus Torvalds { 12511da177e4SLinus Torvalds static const int pre_div[] = { 4,16,128,2048 }; 12521da177e4SLinus Torvalds /* 2^(((x+2)^2-(x+2))/2+1) */ 12531da177e4SLinus Torvalds 12541da177e4SLinus Torvalds if (unlimited) *pre = *res = 0; 12551da177e4SLinus Torvalds else { 12561da177e4SLinus Torvalds if (*pcr > 0) { 12571da177e4SLinus Torvalds int div; 12581da177e4SLinus Torvalds 12591da177e4SLinus Torvalds for (*pre = 0; *pre < 3; (*pre)++) 12601da177e4SLinus Torvalds if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break; 12611da177e4SLinus Torvalds div = pre_div[*pre]**pcr; 12621da177e4SLinus Torvalds DPRINTK("min div %d\n",div); 12631da177e4SLinus Torvalds *res = TS_CLOCK/div-1; 12641da177e4SLinus Torvalds } 12651da177e4SLinus Torvalds else { 12661da177e4SLinus Torvalds int div; 12671da177e4SLinus Torvalds 12681da177e4SLinus Torvalds if (!*pcr) *pcr = eni_dev->tx_bw+reserved; 12691da177e4SLinus Torvalds for (*pre = 3; *pre >= 0; (*pre)--) 12701da177e4SLinus Torvalds if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break; 12711da177e4SLinus Torvalds if (*pre < 3) (*pre)++; /* else fail later */ 12721da177e4SLinus Torvalds div = pre_div[*pre]*-*pcr; 12731da177e4SLinus Torvalds DPRINTK("max div %d\n",div); 12741da177e4SLinus Torvalds *res = (TS_CLOCK+div-1)/div-1; 12751da177e4SLinus Torvalds } 12761da177e4SLinus Torvalds if (*res < 0) *res = 0; 12771da177e4SLinus Torvalds if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE; 12781da177e4SLinus Torvalds } 12791da177e4SLinus Torvalds *pcr = TS_CLOCK/pre_div[*pre]/(*res+1); 12801da177e4SLinus Torvalds DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res); 12811da177e4SLinus Torvalds return 0; 12821da177e4SLinus Torvalds } 12831da177e4SLinus Torvalds 12841da177e4SLinus Torvalds 12851da177e4SLinus Torvalds static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp, 12861da177e4SLinus Torvalds int set_rsv,int set_shp) 12871da177e4SLinus Torvalds { 12881da177e4SLinus Torvalds struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 12891da177e4SLinus Torvalds struct eni_vcc *eni_vcc = ENI_VCC(vcc); 12901da177e4SLinus Torvalds struct eni_tx *tx; 12911da177e4SLinus Torvalds unsigned long size; 12921da177e4SLinus Torvalds void __iomem *mem; 12931da177e4SLinus Torvalds int rate,ubr,unlimited,new_tx; 12941da177e4SLinus Torvalds int pre,res,order; 12951da177e4SLinus Torvalds int error; 12961da177e4SLinus Torvalds 12971da177e4SLinus Torvalds rate = atm_pcr_goal(txtp); 12981da177e4SLinus Torvalds ubr = txtp->traffic_class == ATM_UBR; 12991da177e4SLinus Torvalds unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR || 13001da177e4SLinus Torvalds rate >= ATM_OC3_PCR); 13011da177e4SLinus Torvalds if (!unlimited) { 13021da177e4SLinus Torvalds size = txtp->max_sdu*eni_dev->tx_mult/100; 13031da177e4SLinus Torvalds if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <= 13041da177e4SLinus Torvalds MID_MAX_BUF_SIZE) 13051da177e4SLinus Torvalds size = MID_MAX_BUF_SIZE; 13061da177e4SLinus Torvalds } 13071da177e4SLinus Torvalds else { 13081da177e4SLinus Torvalds if (eni_dev->ubr) { 13091da177e4SLinus Torvalds eni_vcc->tx = eni_dev->ubr; 13101da177e4SLinus Torvalds txtp->pcr = ATM_OC3_PCR; 13111da177e4SLinus Torvalds return 0; 13121da177e4SLinus Torvalds } 13131da177e4SLinus Torvalds size = UBR_BUFFER; 13141da177e4SLinus Torvalds } 13151da177e4SLinus Torvalds new_tx = !eni_vcc->tx; 13161da177e4SLinus Torvalds mem = NULL; /* for gcc */ 13171da177e4SLinus Torvalds if (!new_tx) tx = eni_vcc->tx; 13181da177e4SLinus Torvalds else { 13191da177e4SLinus Torvalds mem = eni_alloc_mem(eni_dev,&size); 13201da177e4SLinus Torvalds if (!mem) return -ENOBUFS; 13211da177e4SLinus Torvalds tx = alloc_tx(eni_dev,unlimited); 13221da177e4SLinus Torvalds if (!tx) { 13231da177e4SLinus Torvalds eni_free_mem(eni_dev,mem,size); 13241da177e4SLinus Torvalds return -EBUSY; 13251da177e4SLinus Torvalds } 13261da177e4SLinus Torvalds DPRINTK("got chan %d\n",tx->index); 13271da177e4SLinus Torvalds tx->reserved = tx->shaping = 0; 13281da177e4SLinus Torvalds tx->send = mem; 13291da177e4SLinus Torvalds tx->words = size >> 2; 13301da177e4SLinus Torvalds skb_queue_head_init(&tx->backlog); 13311da177e4SLinus Torvalds for (order = 0; size > (1 << (order+10)); order++); 13321da177e4SLinus Torvalds eni_out((order << MID_SIZE_SHIFT) | 13331da177e4SLinus Torvalds ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)), 13341da177e4SLinus Torvalds MID_TX_PLACE(tx->index)); 13351da177e4SLinus Torvalds tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) & 13361da177e4SLinus Torvalds MID_DESCR_START; 13371da177e4SLinus Torvalds } 13381da177e4SLinus Torvalds error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited); 13391da177e4SLinus Torvalds if (!error && txtp->min_pcr > rate) error = -EINVAL; 13401da177e4SLinus Torvalds if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR && 13411da177e4SLinus Torvalds txtp->max_pcr < rate) error = -EINVAL; 13421da177e4SLinus Torvalds if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved) 13431da177e4SLinus Torvalds error = -EINVAL; 13441da177e4SLinus Torvalds if (!error && set_rsv && !set_shp && rate < tx->shaping) 13451da177e4SLinus Torvalds error = -EINVAL; 13461da177e4SLinus Torvalds if (!error && !set_rsv && rate > tx->reserved && !ubr) 13471da177e4SLinus Torvalds error = -EINVAL; 13481da177e4SLinus Torvalds if (error) { 13491da177e4SLinus Torvalds if (new_tx) { 13501da177e4SLinus Torvalds tx->send = NULL; 13511da177e4SLinus Torvalds eni_free_mem(eni_dev,mem,size); 13521da177e4SLinus Torvalds } 13531da177e4SLinus Torvalds return error; 13541da177e4SLinus Torvalds } 13551da177e4SLinus Torvalds txtp->pcr = rate; 13561da177e4SLinus Torvalds if (set_rsv && !ubr) { 13571da177e4SLinus Torvalds eni_dev->tx_bw += tx->reserved; 13581da177e4SLinus Torvalds tx->reserved = rate; 13591da177e4SLinus Torvalds eni_dev->tx_bw -= rate; 13601da177e4SLinus Torvalds } 13611da177e4SLinus Torvalds if (set_shp || (unlimited && new_tx)) { 13621da177e4SLinus Torvalds if (unlimited && new_tx) eni_dev->ubr = tx; 13631da177e4SLinus Torvalds tx->prescaler = pre; 13641da177e4SLinus Torvalds tx->resolution = res; 13651da177e4SLinus Torvalds tx->shaping = rate; 13661da177e4SLinus Torvalds } 13671da177e4SLinus Torvalds if (set_shp) eni_vcc->tx = tx; 13681da177e4SLinus Torvalds DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping); 13691da177e4SLinus Torvalds return 0; 13701da177e4SLinus Torvalds } 13711da177e4SLinus Torvalds 13721da177e4SLinus Torvalds 13731da177e4SLinus Torvalds static int open_tx_first(struct atm_vcc *vcc) 13741da177e4SLinus Torvalds { 13751da177e4SLinus Torvalds ENI_VCC(vcc)->tx = NULL; 13761da177e4SLinus Torvalds if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0; 13771da177e4SLinus Torvalds ENI_VCC(vcc)->txing = 0; 13781da177e4SLinus Torvalds return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1); 13791da177e4SLinus Torvalds } 13801da177e4SLinus Torvalds 13811da177e4SLinus Torvalds 13821da177e4SLinus Torvalds static int open_tx_second(struct atm_vcc *vcc) 13831da177e4SLinus Torvalds { 13841da177e4SLinus Torvalds return 0; /* nothing to do */ 13851da177e4SLinus Torvalds } 13861da177e4SLinus Torvalds 13871da177e4SLinus Torvalds 13881da177e4SLinus Torvalds static void close_tx(struct atm_vcc *vcc) 13891da177e4SLinus Torvalds { 13901da177e4SLinus Torvalds DECLARE_WAITQUEUE(wait,current); 13911da177e4SLinus Torvalds struct eni_dev *eni_dev; 13921da177e4SLinus Torvalds struct eni_vcc *eni_vcc; 13931da177e4SLinus Torvalds 13941da177e4SLinus Torvalds eni_vcc = ENI_VCC(vcc); 13951da177e4SLinus Torvalds if (!eni_vcc->tx) return; 13961da177e4SLinus Torvalds eni_dev = ENI_DEV(vcc->dev); 13971da177e4SLinus Torvalds /* wait for TX queue to drain */ 13981da177e4SLinus Torvalds DPRINTK("eni_close: waiting for TX ...\n"); 13991da177e4SLinus Torvalds add_wait_queue(&eni_dev->tx_wait,&wait); 14001da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 14011da177e4SLinus Torvalds for (;;) { 14021da177e4SLinus Torvalds int txing; 14031da177e4SLinus Torvalds 14041da177e4SLinus Torvalds tasklet_disable(&eni_dev->task); 14051da177e4SLinus Torvalds txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing; 14061da177e4SLinus Torvalds tasklet_enable(&eni_dev->task); 14071da177e4SLinus Torvalds if (!txing) break; 14081da177e4SLinus Torvalds DPRINTK("%d TX left\n",eni_vcc->txing); 14091da177e4SLinus Torvalds schedule(); 14101da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 14111da177e4SLinus Torvalds } 14121da177e4SLinus Torvalds set_current_state(TASK_RUNNING); 14131da177e4SLinus Torvalds remove_wait_queue(&eni_dev->tx_wait,&wait); 14141da177e4SLinus Torvalds if (eni_vcc->tx != eni_dev->ubr) { 14151da177e4SLinus Torvalds /* 14161da177e4SLinus Torvalds * Looping a few times in here is probably far cheaper than 14171da177e4SLinus Torvalds * keeping track of TX completions all the time, so let's poll 14181da177e4SLinus Torvalds * a bit ... 14191da177e4SLinus Torvalds */ 14201da177e4SLinus Torvalds while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) != 14211da177e4SLinus Torvalds eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index))) 14221da177e4SLinus Torvalds schedule(); 14231da177e4SLinus Torvalds eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2); 14241da177e4SLinus Torvalds eni_vcc->tx->send = NULL; 14251da177e4SLinus Torvalds eni_dev->tx_bw += eni_vcc->tx->reserved; 14261da177e4SLinus Torvalds } 14271da177e4SLinus Torvalds eni_vcc->tx = NULL; 14281da177e4SLinus Torvalds } 14291da177e4SLinus Torvalds 14301da177e4SLinus Torvalds 14311da177e4SLinus Torvalds static int start_tx(struct atm_dev *dev) 14321da177e4SLinus Torvalds { 14331da177e4SLinus Torvalds struct eni_dev *eni_dev; 14341da177e4SLinus Torvalds int i; 14351da177e4SLinus Torvalds 14361da177e4SLinus Torvalds eni_dev = ENI_DEV(dev); 14371da177e4SLinus Torvalds eni_dev->lost = 0; 14381da177e4SLinus Torvalds eni_dev->tx_bw = ATM_OC3_PCR; 14391da177e4SLinus Torvalds eni_dev->tx_mult = DEFAULT_TX_MULT; 14401da177e4SLinus Torvalds init_waitqueue_head(&eni_dev->tx_wait); 14411da177e4SLinus Torvalds eni_dev->ubr = NULL; 14421da177e4SLinus Torvalds skb_queue_head_init(&eni_dev->tx_queue); 14431da177e4SLinus Torvalds eni_out(0,MID_DMA_WR_TX); 14441da177e4SLinus Torvalds for (i = 0; i < NR_CHAN; i++) { 14451da177e4SLinus Torvalds eni_dev->tx[i].send = NULL; 14461da177e4SLinus Torvalds eni_dev->tx[i].index = i; 14471da177e4SLinus Torvalds } 14481da177e4SLinus Torvalds return 0; 14491da177e4SLinus Torvalds } 14501da177e4SLinus Torvalds 14511da177e4SLinus Torvalds 14521da177e4SLinus Torvalds /*--------------------------------- common ----------------------------------*/ 14531da177e4SLinus Torvalds 14541da177e4SLinus Torvalds 14551da177e4SLinus Torvalds #if 0 /* may become useful again when tuning things */ 14561da177e4SLinus Torvalds 14571da177e4SLinus Torvalds static void foo(void) 14581da177e4SLinus Torvalds { 14591da177e4SLinus Torvalds printk(KERN_INFO 14601da177e4SLinus Torvalds "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n" 14611da177e4SLinus Torvalds "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n", 14621da177e4SLinus Torvalds tx_complete,dma_complete,queued,requeued,submitted,backlogged, 14631da177e4SLinus Torvalds rx_enqueued,rx_dequeued,putting,pushed); 14641da177e4SLinus Torvalds if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost); 14651da177e4SLinus Torvalds } 14661da177e4SLinus Torvalds 14671da177e4SLinus Torvalds #endif 14681da177e4SLinus Torvalds 14691da177e4SLinus Torvalds 14701da177e4SLinus Torvalds static void bug_int(struct atm_dev *dev,unsigned long reason) 14711da177e4SLinus Torvalds { 14721da177e4SLinus Torvalds struct eni_dev *eni_dev; 14731da177e4SLinus Torvalds 14741da177e4SLinus Torvalds DPRINTK(">bug_int\n"); 14751da177e4SLinus Torvalds eni_dev = ENI_DEV(dev); 14761da177e4SLinus Torvalds if (reason & MID_DMA_ERR_ACK) 14771da177e4SLinus Torvalds printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 14781da177e4SLinus Torvalds "error\n",dev->number); 14791da177e4SLinus Torvalds if (reason & MID_TX_IDENT_MISM) 14801da177e4SLinus Torvalds printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident " 14811da177e4SLinus Torvalds "mismatch\n",dev->number); 14821da177e4SLinus Torvalds if (reason & MID_TX_DMA_OVFL) 14831da177e4SLinus Torvalds printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 14841da177e4SLinus Torvalds "overflow\n",dev->number); 14851da177e4SLinus Torvalds EVENT("---dump ends here---\n",0,0); 14861da177e4SLinus Torvalds printk(KERN_NOTICE "---recent events---\n"); 14871da177e4SLinus Torvalds event_dump(); 14881da177e4SLinus Torvalds } 14891da177e4SLinus Torvalds 14901da177e4SLinus Torvalds 14917d12e780SDavid Howells static irqreturn_t eni_int(int irq,void *dev_id) 14921da177e4SLinus Torvalds { 14931da177e4SLinus Torvalds struct atm_dev *dev; 14941da177e4SLinus Torvalds struct eni_dev *eni_dev; 14951da177e4SLinus Torvalds u32 reason; 14961da177e4SLinus Torvalds 14971da177e4SLinus Torvalds DPRINTK(">eni_int\n"); 14981da177e4SLinus Torvalds dev = dev_id; 14991da177e4SLinus Torvalds eni_dev = ENI_DEV(dev); 15001da177e4SLinus Torvalds reason = eni_in(MID_ISA); 15011da177e4SLinus Torvalds DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason); 15021da177e4SLinus Torvalds /* 15031da177e4SLinus Torvalds * Must handle these two right now, because reading ISA doesn't clear 15041da177e4SLinus Torvalds * them, so they re-occur and we never make it to the tasklet. Since 15051da177e4SLinus Torvalds * they're rare, we don't mind the occasional invocation of eni_tasklet 15061da177e4SLinus Torvalds * with eni_dev->events == 0. 15071da177e4SLinus Torvalds */ 15081da177e4SLinus Torvalds if (reason & MID_STAT_OVFL) { 15091da177e4SLinus Torvalds EVENT("stat overflow\n",0,0); 15101da177e4SLinus Torvalds eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH; 15111da177e4SLinus Torvalds } 15121da177e4SLinus Torvalds if (reason & MID_SUNI_INT) { 15131da177e4SLinus Torvalds EVENT("SUNI int\n",0,0); 15141da177e4SLinus Torvalds dev->phy->interrupt(dev); 15151da177e4SLinus Torvalds #if 0 15161da177e4SLinus Torvalds foo(); 15171da177e4SLinus Torvalds #endif 15181da177e4SLinus Torvalds } 15191da177e4SLinus Torvalds spin_lock(&eni_dev->lock); 15201da177e4SLinus Torvalds eni_dev->events |= reason; 15211da177e4SLinus Torvalds spin_unlock(&eni_dev->lock); 15221da177e4SLinus Torvalds tasklet_schedule(&eni_dev->task); 15231da177e4SLinus Torvalds return IRQ_HANDLED; 15241da177e4SLinus Torvalds } 15251da177e4SLinus Torvalds 15261da177e4SLinus Torvalds 15271da177e4SLinus Torvalds static void eni_tasklet(unsigned long data) 15281da177e4SLinus Torvalds { 15291da177e4SLinus Torvalds struct atm_dev *dev = (struct atm_dev *) data; 15301da177e4SLinus Torvalds struct eni_dev *eni_dev = ENI_DEV(dev); 15311da177e4SLinus Torvalds unsigned long flags; 15321da177e4SLinus Torvalds u32 events; 15331da177e4SLinus Torvalds 15341da177e4SLinus Torvalds DPRINTK("eni_tasklet (dev %p)\n",dev); 15351da177e4SLinus Torvalds spin_lock_irqsave(&eni_dev->lock,flags); 15361da177e4SLinus Torvalds events = xchg(&eni_dev->events,0); 15371da177e4SLinus Torvalds spin_unlock_irqrestore(&eni_dev->lock,flags); 15381da177e4SLinus Torvalds if (events & MID_RX_DMA_COMPLETE) { 15391da177e4SLinus Torvalds EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0); 15401da177e4SLinus Torvalds dequeue_rx(dev); 15411da177e4SLinus Torvalds EVENT("dequeue_rx done, starting poll_rx\n",0,0); 15421da177e4SLinus Torvalds poll_rx(dev); 15431da177e4SLinus Torvalds EVENT("poll_rx done\n",0,0); 15441da177e4SLinus Torvalds /* poll_tx ? */ 15451da177e4SLinus Torvalds } 15461da177e4SLinus Torvalds if (events & MID_SERVICE) { 15471da177e4SLinus Torvalds EVENT("INT: service, starting get_service\n",0,0); 15481da177e4SLinus Torvalds get_service(dev); 15491da177e4SLinus Torvalds EVENT("get_service done, starting poll_rx\n",0,0); 15501da177e4SLinus Torvalds poll_rx(dev); 15511da177e4SLinus Torvalds EVENT("poll_rx done\n",0,0); 15521da177e4SLinus Torvalds } 15531da177e4SLinus Torvalds if (events & MID_TX_DMA_COMPLETE) { 15541da177e4SLinus Torvalds EVENT("INT: TX DMA COMPLETE\n",0,0); 15551da177e4SLinus Torvalds dequeue_tx(dev); 15561da177e4SLinus Torvalds } 15571da177e4SLinus Torvalds if (events & MID_TX_COMPLETE) { 15581da177e4SLinus Torvalds EVENT("INT: TX COMPLETE\n",0,0); 15591da177e4SLinus Torvalds tx_complete++; 15601da177e4SLinus Torvalds wake_up(&eni_dev->tx_wait); 15611da177e4SLinus Torvalds /* poll_rx ? */ 15621da177e4SLinus Torvalds } 15631da177e4SLinus Torvalds if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) { 15641da177e4SLinus Torvalds EVENT("bug interrupt\n",0,0); 15651da177e4SLinus Torvalds bug_int(dev,events); 15661da177e4SLinus Torvalds } 15671da177e4SLinus Torvalds poll_tx(dev); 15681da177e4SLinus Torvalds } 15691da177e4SLinus Torvalds 15701da177e4SLinus Torvalds 15711da177e4SLinus Torvalds /*--------------------------------- entries ---------------------------------*/ 15721da177e4SLinus Torvalds 15731da177e4SLinus Torvalds 15741da177e4SLinus Torvalds static const char *media_name[] __devinitdata = { 15751da177e4SLinus Torvalds "MMF", "SMF", "MMF", "03?", /* 0- 3 */ 15761da177e4SLinus Torvalds "UTP", "05?", "06?", "07?", /* 4- 7 */ 15771da177e4SLinus Torvalds "TAXI","09?", "10?", "11?", /* 8-11 */ 15781da177e4SLinus Torvalds "12?", "13?", "14?", "15?", /* 12-15 */ 15791da177e4SLinus Torvalds "MMF", "SMF", "18?", "19?", /* 16-19 */ 15801da177e4SLinus Torvalds "UTP", "21?", "22?", "23?", /* 20-23 */ 15811da177e4SLinus Torvalds "24?", "25?", "26?", "27?", /* 24-27 */ 15821da177e4SLinus Torvalds "28?", "29?", "30?", "31?" /* 28-31 */ 15831da177e4SLinus Torvalds }; 15841da177e4SLinus Torvalds 15851da177e4SLinus Torvalds 15861da177e4SLinus Torvalds #define SET_SEPROM \ 15871da177e4SLinus Torvalds ({ if (!error && !pci_error) { \ 15881da177e4SLinus Torvalds pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \ 15891da177e4SLinus Torvalds udelay(10); /* 10 usecs */ \ 15901da177e4SLinus Torvalds } }) 15911da177e4SLinus Torvalds #define GET_SEPROM \ 15921da177e4SLinus Torvalds ({ if (!error && !pci_error) { \ 15931da177e4SLinus Torvalds pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \ 15941da177e4SLinus Torvalds udelay(10); /* 10 usecs */ \ 15951da177e4SLinus Torvalds } }) 15961da177e4SLinus Torvalds 15971da177e4SLinus Torvalds 15981da177e4SLinus Torvalds static int __devinit get_esi_asic(struct atm_dev *dev) 15991da177e4SLinus Torvalds { 16001da177e4SLinus Torvalds struct eni_dev *eni_dev; 16011da177e4SLinus Torvalds unsigned char tonga; 16021da177e4SLinus Torvalds int error,failed,pci_error; 16031da177e4SLinus Torvalds int address,i,j; 16041da177e4SLinus Torvalds 16051da177e4SLinus Torvalds eni_dev = ENI_DEV(dev); 16061da177e4SLinus Torvalds error = pci_error = 0; 16071da177e4SLinus Torvalds tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK; 16081da177e4SLinus Torvalds SET_SEPROM; 16091da177e4SLinus Torvalds for (i = 0; i < ESI_LEN && !error && !pci_error; i++) { 16101da177e4SLinus Torvalds /* start operation */ 16111da177e4SLinus Torvalds tonga |= SEPROM_DATA; 16121da177e4SLinus Torvalds SET_SEPROM; 16131da177e4SLinus Torvalds tonga |= SEPROM_CLK; 16141da177e4SLinus Torvalds SET_SEPROM; 16151da177e4SLinus Torvalds tonga &= ~SEPROM_DATA; 16161da177e4SLinus Torvalds SET_SEPROM; 16171da177e4SLinus Torvalds tonga &= ~SEPROM_CLK; 16181da177e4SLinus Torvalds SET_SEPROM; 16191da177e4SLinus Torvalds /* send address */ 16201da177e4SLinus Torvalds address = ((i+SEPROM_ESI_BASE) << 1)+1; 16211da177e4SLinus Torvalds for (j = 7; j >= 0; j--) { 16221da177e4SLinus Torvalds tonga = (address >> j) & 1 ? tonga | SEPROM_DATA : 16231da177e4SLinus Torvalds tonga & ~SEPROM_DATA; 16241da177e4SLinus Torvalds SET_SEPROM; 16251da177e4SLinus Torvalds tonga |= SEPROM_CLK; 16261da177e4SLinus Torvalds SET_SEPROM; 16271da177e4SLinus Torvalds tonga &= ~SEPROM_CLK; 16281da177e4SLinus Torvalds SET_SEPROM; 16291da177e4SLinus Torvalds } 16301da177e4SLinus Torvalds /* get ack */ 16311da177e4SLinus Torvalds tonga |= SEPROM_DATA; 16321da177e4SLinus Torvalds SET_SEPROM; 16331da177e4SLinus Torvalds tonga |= SEPROM_CLK; 16341da177e4SLinus Torvalds SET_SEPROM; 16351da177e4SLinus Torvalds GET_SEPROM; 16361da177e4SLinus Torvalds failed = tonga & SEPROM_DATA; 16371da177e4SLinus Torvalds tonga &= ~SEPROM_CLK; 16381da177e4SLinus Torvalds SET_SEPROM; 16391da177e4SLinus Torvalds tonga |= SEPROM_DATA; 16401da177e4SLinus Torvalds SET_SEPROM; 16411da177e4SLinus Torvalds if (failed) error = -EIO; 16421da177e4SLinus Torvalds else { 16431da177e4SLinus Torvalds dev->esi[i] = 0; 16441da177e4SLinus Torvalds for (j = 7; j >= 0; j--) { 16451da177e4SLinus Torvalds dev->esi[i] <<= 1; 16461da177e4SLinus Torvalds tonga |= SEPROM_DATA; 16471da177e4SLinus Torvalds SET_SEPROM; 16481da177e4SLinus Torvalds tonga |= SEPROM_CLK; 16491da177e4SLinus Torvalds SET_SEPROM; 16501da177e4SLinus Torvalds GET_SEPROM; 16511da177e4SLinus Torvalds if (tonga & SEPROM_DATA) dev->esi[i] |= 1; 16521da177e4SLinus Torvalds tonga &= ~SEPROM_CLK; 16531da177e4SLinus Torvalds SET_SEPROM; 16541da177e4SLinus Torvalds tonga |= SEPROM_DATA; 16551da177e4SLinus Torvalds SET_SEPROM; 16561da177e4SLinus Torvalds } 16571da177e4SLinus Torvalds /* get ack */ 16581da177e4SLinus Torvalds tonga |= SEPROM_DATA; 16591da177e4SLinus Torvalds SET_SEPROM; 16601da177e4SLinus Torvalds tonga |= SEPROM_CLK; 16611da177e4SLinus Torvalds SET_SEPROM; 16621da177e4SLinus Torvalds GET_SEPROM; 16631da177e4SLinus Torvalds if (!(tonga & SEPROM_DATA)) error = -EIO; 16641da177e4SLinus Torvalds tonga &= ~SEPROM_CLK; 16651da177e4SLinus Torvalds SET_SEPROM; 16661da177e4SLinus Torvalds tonga |= SEPROM_DATA; 16671da177e4SLinus Torvalds SET_SEPROM; 16681da177e4SLinus Torvalds } 16691da177e4SLinus Torvalds /* stop operation */ 16701da177e4SLinus Torvalds tonga &= ~SEPROM_DATA; 16711da177e4SLinus Torvalds SET_SEPROM; 16721da177e4SLinus Torvalds tonga |= SEPROM_CLK; 16731da177e4SLinus Torvalds SET_SEPROM; 16741da177e4SLinus Torvalds tonga |= SEPROM_DATA; 16751da177e4SLinus Torvalds SET_SEPROM; 16761da177e4SLinus Torvalds } 16771da177e4SLinus Torvalds if (pci_error) { 16781da177e4SLinus Torvalds printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI " 16791da177e4SLinus Torvalds "(0x%02x)\n",dev->number,pci_error); 16801da177e4SLinus Torvalds error = -EIO; 16811da177e4SLinus Torvalds } 16821da177e4SLinus Torvalds return error; 16831da177e4SLinus Torvalds } 16841da177e4SLinus Torvalds 16851da177e4SLinus Torvalds 16861da177e4SLinus Torvalds #undef SET_SEPROM 16871da177e4SLinus Torvalds #undef GET_SEPROM 16881da177e4SLinus Torvalds 16891da177e4SLinus Torvalds 16901da177e4SLinus Torvalds static int __devinit get_esi_fpga(struct atm_dev *dev, void __iomem *base) 16911da177e4SLinus Torvalds { 16921da177e4SLinus Torvalds void __iomem *mac_base; 16931da177e4SLinus Torvalds int i; 16941da177e4SLinus Torvalds 16951da177e4SLinus Torvalds mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom); 16961da177e4SLinus Torvalds for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3)); 16971da177e4SLinus Torvalds return 0; 16981da177e4SLinus Torvalds } 16991da177e4SLinus Torvalds 17001da177e4SLinus Torvalds 17011da177e4SLinus Torvalds static int __devinit eni_do_init(struct atm_dev *dev) 17021da177e4SLinus Torvalds { 17031da177e4SLinus Torvalds struct midway_eprom __iomem *eprom; 17041da177e4SLinus Torvalds struct eni_dev *eni_dev; 17051da177e4SLinus Torvalds struct pci_dev *pci_dev; 17061da177e4SLinus Torvalds unsigned long real_base; 17071da177e4SLinus Torvalds void __iomem *base; 17081da177e4SLinus Torvalds unsigned char revision; 17091da177e4SLinus Torvalds int error,i,last; 17101da177e4SLinus Torvalds 17111da177e4SLinus Torvalds DPRINTK(">eni_init\n"); 17121da177e4SLinus Torvalds dev->ci_range.vpi_bits = 0; 17131da177e4SLinus Torvalds dev->ci_range.vci_bits = NR_VCI_LD; 17141da177e4SLinus Torvalds dev->link_rate = ATM_OC3_PCR; 17151da177e4SLinus Torvalds eni_dev = ENI_DEV(dev); 17161da177e4SLinus Torvalds pci_dev = eni_dev->pci_dev; 17171da177e4SLinus Torvalds real_base = pci_resource_start(pci_dev, 0); 17181da177e4SLinus Torvalds eni_dev->irq = pci_dev->irq; 17191da177e4SLinus Torvalds error = pci_read_config_byte(pci_dev,PCI_REVISION_ID,&revision); 17201da177e4SLinus Torvalds if (error) { 17211da177e4SLinus Torvalds printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n", 17221da177e4SLinus Torvalds dev->number,error); 17231da177e4SLinus Torvalds return -EINVAL; 17241da177e4SLinus Torvalds } 17251da177e4SLinus Torvalds if ((error = pci_write_config_word(pci_dev,PCI_COMMAND, 17261da177e4SLinus Torvalds PCI_COMMAND_MEMORY | 17271da177e4SLinus Torvalds (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 17281da177e4SLinus Torvalds printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory " 17291da177e4SLinus Torvalds "(0x%02x)\n",dev->number,error); 17301da177e4SLinus Torvalds return -EIO; 17311da177e4SLinus Torvalds } 17321da177e4SLinus Torvalds printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,", 17331da177e4SLinus Torvalds dev->number,revision,real_base,eni_dev->irq); 17341da177e4SLinus Torvalds if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) { 17351da177e4SLinus Torvalds printk("\n"); 17361da177e4SLinus Torvalds printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page " 17371da177e4SLinus Torvalds "mapping\n",dev->number); 17381da177e4SLinus Torvalds return error; 17391da177e4SLinus Torvalds } 17401da177e4SLinus Torvalds eni_dev->base_diff = real_base - (unsigned long) base; 17411da177e4SLinus Torvalds /* id may not be present in ASIC Tonga boards - check this @@@ */ 17421da177e4SLinus Torvalds if (!eni_dev->asic) { 17431da177e4SLinus Torvalds eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom)); 17441da177e4SLinus Torvalds if (readl(&eprom->magic) != ENI155_MAGIC) { 17451da177e4SLinus Torvalds printk("\n"); 17461da177e4SLinus Torvalds printk(KERN_ERR KERN_ERR DEV_LABEL "(itf %d): bad " 17471da177e4SLinus Torvalds "magic - expected 0x%x, got 0x%x\n",dev->number, 17481da177e4SLinus Torvalds ENI155_MAGIC,(unsigned) readl(&eprom->magic)); 17491da177e4SLinus Torvalds return -EINVAL; 17501da177e4SLinus Torvalds } 17511da177e4SLinus Torvalds } 17521da177e4SLinus Torvalds eni_dev->phy = base+PHY_BASE; 17531da177e4SLinus Torvalds eni_dev->reg = base+REG_BASE; 17541da177e4SLinus Torvalds eni_dev->ram = base+RAM_BASE; 17551da177e4SLinus Torvalds last = MAP_MAX_SIZE-RAM_BASE; 17561da177e4SLinus Torvalds for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) { 17571da177e4SLinus Torvalds writel(0x55555555,eni_dev->ram+i); 17581da177e4SLinus Torvalds if (readl(eni_dev->ram+i) != 0x55555555) last = i; 17591da177e4SLinus Torvalds else { 17601da177e4SLinus Torvalds writel(0xAAAAAAAA,eni_dev->ram+i); 17611da177e4SLinus Torvalds if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i; 17621da177e4SLinus Torvalds else writel(i,eni_dev->ram+i); 17631da177e4SLinus Torvalds } 17641da177e4SLinus Torvalds } 17651da177e4SLinus Torvalds for (i = 0; i < last; i += RAM_INCREMENT) 17661da177e4SLinus Torvalds if (readl(eni_dev->ram+i) != i) break; 17671da177e4SLinus Torvalds eni_dev->mem = i; 17681da177e4SLinus Torvalds memset_io(eni_dev->ram,0,eni_dev->mem); 17691da177e4SLinus Torvalds /* TODO: should shrink allocation now */ 17701da177e4SLinus Torvalds printk("mem=%dkB (",eni_dev->mem >> 10); 17711da177e4SLinus Torvalds /* TODO: check for non-SUNI, check for TAXI ? */ 17721da177e4SLinus Torvalds if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) { 17731da177e4SLinus Torvalds printk(")\n"); 17741da177e4SLinus Torvalds printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n", 17751da177e4SLinus Torvalds dev->number,(unsigned) eni_in(MID_RES_ID_MCON)); 17761da177e4SLinus Torvalds return -EINVAL; 17771da177e4SLinus Torvalds } 17781da177e4SLinus Torvalds error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base); 17791da177e4SLinus Torvalds if (error) return error; 17801da177e4SLinus Torvalds for (i = 0; i < ESI_LEN; i++) 17811da177e4SLinus Torvalds printk("%s%02X",i ? "-" : "",dev->esi[i]); 17821da177e4SLinus Torvalds printk(")\n"); 17831da177e4SLinus Torvalds printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number, 17841da177e4SLinus Torvalds eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA", 17851da177e4SLinus Torvalds media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]); 17861da177e4SLinus Torvalds return suni_init(dev); 17871da177e4SLinus Torvalds } 17881da177e4SLinus Torvalds 17891da177e4SLinus Torvalds 17901da177e4SLinus Torvalds static int __devinit eni_start(struct atm_dev *dev) 17911da177e4SLinus Torvalds { 17921da177e4SLinus Torvalds struct eni_dev *eni_dev; 17931da177e4SLinus Torvalds 17941da177e4SLinus Torvalds void __iomem *buf; 17951da177e4SLinus Torvalds unsigned long buffer_mem; 17961da177e4SLinus Torvalds int error; 17971da177e4SLinus Torvalds 17981da177e4SLinus Torvalds DPRINTK(">eni_start\n"); 17991da177e4SLinus Torvalds eni_dev = ENI_DEV(dev); 1800dace1453SThomas Gleixner if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) { 18011da177e4SLinus Torvalds printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n", 18021da177e4SLinus Torvalds dev->number,eni_dev->irq); 1803758d11bfSAndrew Morton error = -EAGAIN; 1804758d11bfSAndrew Morton goto out; 18051da177e4SLinus Torvalds } 18061da177e4SLinus Torvalds pci_set_master(eni_dev->pci_dev); 18071da177e4SLinus Torvalds if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND, 18081da177e4SLinus Torvalds PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 18091da177e4SLinus Torvalds (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 18101da177e4SLinus Torvalds printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+" 18111da177e4SLinus Torvalds "master (0x%02x)\n",dev->number,error); 1812758d11bfSAndrew Morton goto free_irq; 18131da177e4SLinus Torvalds } 18141da177e4SLinus Torvalds if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL, 18151da177e4SLinus Torvalds END_SWAP_DMA))) { 18161da177e4SLinus Torvalds printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap " 18171da177e4SLinus Torvalds "(0x%02x)\n",dev->number,error); 1818758d11bfSAndrew Morton goto free_irq; 18191da177e4SLinus Torvalds } 18201da177e4SLinus Torvalds /* determine addresses of internal tables */ 18211da177e4SLinus Torvalds eni_dev->vci = eni_dev->ram; 18221da177e4SLinus Torvalds eni_dev->rx_dma = eni_dev->ram+NR_VCI*16; 18231da177e4SLinus Torvalds eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8; 18241da177e4SLinus Torvalds eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8; 18251da177e4SLinus Torvalds buf = eni_dev->service+NR_SERVICE*4; 18261da177e4SLinus Torvalds DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n", 18271da177e4SLinus Torvalds eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma, 18281da177e4SLinus Torvalds eni_dev->service,buf); 18291da177e4SLinus Torvalds spin_lock_init(&eni_dev->lock); 18301da177e4SLinus Torvalds tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev); 18311da177e4SLinus Torvalds eni_dev->events = 0; 18321da177e4SLinus Torvalds /* initialize memory management */ 18331da177e4SLinus Torvalds buffer_mem = eni_dev->mem - (buf - eni_dev->ram); 18341da177e4SLinus Torvalds eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2; 18351da177e4SLinus Torvalds eni_dev->free_list = (struct eni_free *) kmalloc( 18361da177e4SLinus Torvalds sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL); 18371da177e4SLinus Torvalds if (!eni_dev->free_list) { 18381da177e4SLinus Torvalds printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 18391da177e4SLinus Torvalds dev->number); 1840758d11bfSAndrew Morton error = -ENOMEM; 1841758d11bfSAndrew Morton goto free_irq; 18421da177e4SLinus Torvalds } 18431da177e4SLinus Torvalds eni_dev->free_len = 0; 18441da177e4SLinus Torvalds eni_put_free(eni_dev,buf,buffer_mem); 18451da177e4SLinus Torvalds memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */ 18461da177e4SLinus Torvalds /* 18471da177e4SLinus Torvalds * byte_addr free (k) 18481da177e4SLinus Torvalds * 0x00000000 512 VCI table 18491da177e4SLinus Torvalds * 0x00004000 496 RX DMA 18501da177e4SLinus Torvalds * 0x00005000 492 TX DMA 18511da177e4SLinus Torvalds * 0x00006000 488 service list 18521da177e4SLinus Torvalds * 0x00007000 484 buffers 18531da177e4SLinus Torvalds * 0x00080000 0 end (512kB) 18541da177e4SLinus Torvalds */ 18551da177e4SLinus Torvalds eni_out(0xffffffff,MID_IE); 18561da177e4SLinus Torvalds error = start_tx(dev); 1857758d11bfSAndrew Morton if (error) goto free_list; 18581da177e4SLinus Torvalds error = start_rx(dev); 1859758d11bfSAndrew Morton if (error) goto free_list; 18601da177e4SLinus Torvalds error = dev->phy->start(dev); 1861758d11bfSAndrew Morton if (error) goto free_list; 18621da177e4SLinus Torvalds eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) | 18631da177e4SLinus Torvalds MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE, 18641da177e4SLinus Torvalds MID_MC_S); 18651da177e4SLinus Torvalds /* Tonga uses SBus INTReq1 */ 18661da177e4SLinus Torvalds (void) eni_in(MID_ISA); /* clear Midway interrupts */ 18671da177e4SLinus Torvalds return 0; 1868758d11bfSAndrew Morton 1869758d11bfSAndrew Morton free_list: 1870758d11bfSAndrew Morton kfree(eni_dev->free_list); 1871758d11bfSAndrew Morton 1872758d11bfSAndrew Morton free_irq: 1873758d11bfSAndrew Morton free_irq(eni_dev->irq, eni_dev); 1874758d11bfSAndrew Morton 1875758d11bfSAndrew Morton out: 1876758d11bfSAndrew Morton return error; 18771da177e4SLinus Torvalds } 18781da177e4SLinus Torvalds 18791da177e4SLinus Torvalds 18801da177e4SLinus Torvalds static void eni_close(struct atm_vcc *vcc) 18811da177e4SLinus Torvalds { 18821da177e4SLinus Torvalds DPRINTK(">eni_close\n"); 18831da177e4SLinus Torvalds if (!ENI_VCC(vcc)) return; 18841da177e4SLinus Torvalds clear_bit(ATM_VF_READY,&vcc->flags); 18851da177e4SLinus Torvalds close_rx(vcc); 18861da177e4SLinus Torvalds close_tx(vcc); 18871da177e4SLinus Torvalds DPRINTK("eni_close: done waiting\n"); 18881da177e4SLinus Torvalds /* deallocate memory */ 18891da177e4SLinus Torvalds kfree(ENI_VCC(vcc)); 18901da177e4SLinus Torvalds vcc->dev_data = NULL; 18911da177e4SLinus Torvalds clear_bit(ATM_VF_ADDR,&vcc->flags); 18921da177e4SLinus Torvalds /*foo();*/ 18931da177e4SLinus Torvalds } 18941da177e4SLinus Torvalds 18951da177e4SLinus Torvalds 18961da177e4SLinus Torvalds static int eni_open(struct atm_vcc *vcc) 18971da177e4SLinus Torvalds { 18981da177e4SLinus Torvalds struct eni_dev *eni_dev; 18991da177e4SLinus Torvalds struct eni_vcc *eni_vcc; 19001da177e4SLinus Torvalds int error; 19011da177e4SLinus Torvalds short vpi = vcc->vpi; 19021da177e4SLinus Torvalds int vci = vcc->vci; 19031da177e4SLinus Torvalds 19041da177e4SLinus Torvalds DPRINTK(">eni_open\n"); 19051da177e4SLinus Torvalds EVENT("eni_open\n",0,0); 19061da177e4SLinus Torvalds if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) 19071da177e4SLinus Torvalds vcc->dev_data = NULL; 19081da177e4SLinus Torvalds eni_dev = ENI_DEV(vcc->dev); 19091da177e4SLinus Torvalds if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC) 19101da177e4SLinus Torvalds set_bit(ATM_VF_ADDR,&vcc->flags); 19111da177e4SLinus Torvalds if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5) 19121da177e4SLinus Torvalds return -EINVAL; 19131da177e4SLinus Torvalds DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi, 19141da177e4SLinus Torvalds vcc->vci); 19151da177e4SLinus Torvalds if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) { 19161da177e4SLinus Torvalds eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL); 19171da177e4SLinus Torvalds if (!eni_vcc) return -ENOMEM; 19181da177e4SLinus Torvalds vcc->dev_data = eni_vcc; 19191da177e4SLinus Torvalds eni_vcc->tx = NULL; /* for eni_close after open_rx */ 19201da177e4SLinus Torvalds if ((error = open_rx_first(vcc))) { 19211da177e4SLinus Torvalds eni_close(vcc); 19221da177e4SLinus Torvalds return error; 19231da177e4SLinus Torvalds } 19241da177e4SLinus Torvalds if ((error = open_tx_first(vcc))) { 19251da177e4SLinus Torvalds eni_close(vcc); 19261da177e4SLinus Torvalds return error; 19271da177e4SLinus Torvalds } 19281da177e4SLinus Torvalds } 19291da177e4SLinus Torvalds if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0; 19301da177e4SLinus Torvalds if ((error = open_rx_second(vcc))) { 19311da177e4SLinus Torvalds eni_close(vcc); 19321da177e4SLinus Torvalds return error; 19331da177e4SLinus Torvalds } 19341da177e4SLinus Torvalds if ((error = open_tx_second(vcc))) { 19351da177e4SLinus Torvalds eni_close(vcc); 19361da177e4SLinus Torvalds return error; 19371da177e4SLinus Torvalds } 19381da177e4SLinus Torvalds set_bit(ATM_VF_READY,&vcc->flags); 19391da177e4SLinus Torvalds /* should power down SUNI while !ref_count @@@ */ 19401da177e4SLinus Torvalds return 0; 19411da177e4SLinus Torvalds } 19421da177e4SLinus Torvalds 19431da177e4SLinus Torvalds 19441da177e4SLinus Torvalds static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs) 19451da177e4SLinus Torvalds { 19461da177e4SLinus Torvalds struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 19471da177e4SLinus Torvalds struct eni_tx *tx = ENI_VCC(vcc)->tx; 19481da177e4SLinus Torvalds struct sk_buff *skb; 19491da177e4SLinus Torvalds int error,rate,rsv,shp; 19501da177e4SLinus Torvalds 19511da177e4SLinus Torvalds if (qos->txtp.traffic_class == ATM_NONE) return 0; 19521da177e4SLinus Torvalds if (tx == eni_dev->ubr) return -EBADFD; 19531da177e4SLinus Torvalds rate = atm_pcr_goal(&qos->txtp); 19541da177e4SLinus Torvalds if (rate < 0) rate = -rate; 19551da177e4SLinus Torvalds rsv = shp = 0; 19561da177e4SLinus Torvalds if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1; 19571da177e4SLinus Torvalds if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1; 19581da177e4SLinus Torvalds if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1; 19591da177e4SLinus Torvalds if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1; 19601da177e4SLinus Torvalds if (!rsv && !shp) return 0; 19611da177e4SLinus Torvalds error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp); 19621da177e4SLinus Torvalds if (error) return error; 19631da177e4SLinus Torvalds if (shp && !(flgs & ATM_MF_IMMED)) return 0; 19641da177e4SLinus Torvalds /* 19651da177e4SLinus Torvalds * Walk through the send buffer and patch the rate information in all 19661da177e4SLinus Torvalds * segmentation buffer descriptors of this VCC. 19671da177e4SLinus Torvalds */ 19681da177e4SLinus Torvalds tasklet_disable(&eni_dev->task); 19691da177e4SLinus Torvalds skb_queue_walk(&eni_dev->tx_queue, skb) { 19701da177e4SLinus Torvalds void __iomem *dsc; 19711da177e4SLinus Torvalds 19721da177e4SLinus Torvalds if (ATM_SKB(skb)->vcc != vcc) continue; 19731da177e4SLinus Torvalds dsc = tx->send+ENI_PRV_POS(skb)*4; 19741da177e4SLinus Torvalds writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) | 19751da177e4SLinus Torvalds (tx->prescaler << MID_SEG_PR_SHIFT) | 19761da177e4SLinus Torvalds (tx->resolution << MID_SEG_RATE_SHIFT), dsc); 19771da177e4SLinus Torvalds } 19781da177e4SLinus Torvalds tasklet_enable(&eni_dev->task); 19791da177e4SLinus Torvalds return 0; 19801da177e4SLinus Torvalds } 19811da177e4SLinus Torvalds 19821da177e4SLinus Torvalds 19831da177e4SLinus Torvalds static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg) 19841da177e4SLinus Torvalds { 19851da177e4SLinus Torvalds struct eni_dev *eni_dev = ENI_DEV(dev); 19861da177e4SLinus Torvalds 19871da177e4SLinus Torvalds if (cmd == ENI_MEMDUMP) { 19881da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) return -EPERM; 19891da177e4SLinus Torvalds printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d " 19901da177e4SLinus Torvalds "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number); 19911da177e4SLinus Torvalds dump(dev); 19921da177e4SLinus Torvalds return 0; 19931da177e4SLinus Torvalds } 19941da177e4SLinus Torvalds if (cmd == ENI_SETMULT) { 19951da177e4SLinus Torvalds struct eni_multipliers mult; 19961da177e4SLinus Torvalds 19971da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) return -EPERM; 19981da177e4SLinus Torvalds if (copy_from_user(&mult, arg, 19991da177e4SLinus Torvalds sizeof(struct eni_multipliers))) 20001da177e4SLinus Torvalds return -EFAULT; 20011da177e4SLinus Torvalds if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) || 20021da177e4SLinus Torvalds mult.tx > 65536 || mult.rx > 65536) 20031da177e4SLinus Torvalds return -EINVAL; 20041da177e4SLinus Torvalds if (mult.tx) eni_dev->tx_mult = mult.tx; 20051da177e4SLinus Torvalds if (mult.rx) eni_dev->rx_mult = mult.rx; 20061da177e4SLinus Torvalds return 0; 20071da177e4SLinus Torvalds } 20081da177e4SLinus Torvalds if (cmd == ATM_SETCIRANGE) { 20091da177e4SLinus Torvalds struct atm_cirange ci; 20101da177e4SLinus Torvalds 20111da177e4SLinus Torvalds if (copy_from_user(&ci, arg,sizeof(struct atm_cirange))) 20121da177e4SLinus Torvalds return -EFAULT; 20131da177e4SLinus Torvalds if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) && 20141da177e4SLinus Torvalds (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX)) 20151da177e4SLinus Torvalds return 0; 20161da177e4SLinus Torvalds return -EINVAL; 20171da177e4SLinus Torvalds } 20181da177e4SLinus Torvalds if (!dev->phy->ioctl) return -ENOIOCTLCMD; 20191da177e4SLinus Torvalds return dev->phy->ioctl(dev,cmd,arg); 20201da177e4SLinus Torvalds } 20211da177e4SLinus Torvalds 20221da177e4SLinus Torvalds 20231da177e4SLinus Torvalds static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname, 20241da177e4SLinus Torvalds void __user *optval,int optlen) 20251da177e4SLinus Torvalds { 20261da177e4SLinus Torvalds return -EINVAL; 20271da177e4SLinus Torvalds } 20281da177e4SLinus Torvalds 20291da177e4SLinus Torvalds 20301da177e4SLinus Torvalds static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname, 20311da177e4SLinus Torvalds void __user *optval,int optlen) 20321da177e4SLinus Torvalds { 20331da177e4SLinus Torvalds return -EINVAL; 20341da177e4SLinus Torvalds } 20351da177e4SLinus Torvalds 20361da177e4SLinus Torvalds 20371da177e4SLinus Torvalds static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb) 20381da177e4SLinus Torvalds { 20391da177e4SLinus Torvalds enum enq_res res; 20401da177e4SLinus Torvalds 20411da177e4SLinus Torvalds DPRINTK(">eni_send\n"); 20421da177e4SLinus Torvalds if (!ENI_VCC(vcc)->tx) { 20431da177e4SLinus Torvalds if (vcc->pop) vcc->pop(vcc,skb); 20441da177e4SLinus Torvalds else dev_kfree_skb(skb); 20451da177e4SLinus Torvalds return -EINVAL; 20461da177e4SLinus Torvalds } 20471da177e4SLinus Torvalds if (!skb) { 20481da177e4SLinus Torvalds printk(KERN_CRIT "!skb in eni_send ?\n"); 20491da177e4SLinus Torvalds if (vcc->pop) vcc->pop(vcc,skb); 20501da177e4SLinus Torvalds return -EINVAL; 20511da177e4SLinus Torvalds } 20521da177e4SLinus Torvalds if (vcc->qos.aal == ATM_AAL0) { 20531da177e4SLinus Torvalds if (skb->len != ATM_CELL_SIZE-1) { 20541da177e4SLinus Torvalds if (vcc->pop) vcc->pop(vcc,skb); 20551da177e4SLinus Torvalds else dev_kfree_skb(skb); 20561da177e4SLinus Torvalds return -EINVAL; 20571da177e4SLinus Torvalds } 20581da177e4SLinus Torvalds *(u32 *) skb->data = htonl(*(u32 *) skb->data); 20591da177e4SLinus Torvalds } 20601da177e4SLinus Torvalds submitted++; 20611da177e4SLinus Torvalds ATM_SKB(skb)->vcc = vcc; 20621da177e4SLinus Torvalds tasklet_disable(&ENI_DEV(vcc->dev)->task); 20631da177e4SLinus Torvalds res = do_tx(skb); 20641da177e4SLinus Torvalds tasklet_enable(&ENI_DEV(vcc->dev)->task); 20651da177e4SLinus Torvalds if (res == enq_ok) return 0; 20661da177e4SLinus Torvalds skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb); 20671da177e4SLinus Torvalds backlogged++; 20681da177e4SLinus Torvalds tasklet_schedule(&ENI_DEV(vcc->dev)->task); 20691da177e4SLinus Torvalds return 0; 20701da177e4SLinus Torvalds } 20711da177e4SLinus Torvalds 20721da177e4SLinus Torvalds static void eni_phy_put(struct atm_dev *dev,unsigned char value, 20731da177e4SLinus Torvalds unsigned long addr) 20741da177e4SLinus Torvalds { 20751da177e4SLinus Torvalds writel(value,ENI_DEV(dev)->phy+addr*4); 20761da177e4SLinus Torvalds } 20771da177e4SLinus Torvalds 20781da177e4SLinus Torvalds 20791da177e4SLinus Torvalds 20801da177e4SLinus Torvalds static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr) 20811da177e4SLinus Torvalds { 20821da177e4SLinus Torvalds return readl(ENI_DEV(dev)->phy+addr*4); 20831da177e4SLinus Torvalds } 20841da177e4SLinus Torvalds 20851da177e4SLinus Torvalds 20861da177e4SLinus Torvalds static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page) 20871da177e4SLinus Torvalds { 20881da177e4SLinus Torvalds struct hlist_node *node; 20891da177e4SLinus Torvalds struct sock *s; 20901da177e4SLinus Torvalds static const char *signal[] = { "LOST","unknown","okay" }; 20911da177e4SLinus Torvalds struct eni_dev *eni_dev = ENI_DEV(dev); 20921da177e4SLinus Torvalds struct atm_vcc *vcc; 20931da177e4SLinus Torvalds int left,i; 20941da177e4SLinus Torvalds 20951da177e4SLinus Torvalds left = *pos; 20961da177e4SLinus Torvalds if (!left) 20971da177e4SLinus Torvalds return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, " 20981da177e4SLinus Torvalds "%d cps remaining\n",dev->number,signal[(int) dev->signal], 20991da177e4SLinus Torvalds eni_dev->mem >> 10,eni_dev->tx_bw); 21001da177e4SLinus Torvalds if (!--left) 21011da177e4SLinus Torvalds return sprintf(page,"%4sBursts: TX" 21021da177e4SLinus Torvalds #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \ 21031da177e4SLinus Torvalds !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \ 21041da177e4SLinus Torvalds !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \ 21051da177e4SLinus Torvalds !defined(CONFIG_ATM_ENI_BURST_TX_2W) 21061da177e4SLinus Torvalds " none" 21071da177e4SLinus Torvalds #endif 21081da177e4SLinus Torvalds #ifdef CONFIG_ATM_ENI_BURST_TX_16W 21091da177e4SLinus Torvalds " 16W" 21101da177e4SLinus Torvalds #endif 21111da177e4SLinus Torvalds #ifdef CONFIG_ATM_ENI_BURST_TX_8W 21121da177e4SLinus Torvalds " 8W" 21131da177e4SLinus Torvalds #endif 21141da177e4SLinus Torvalds #ifdef CONFIG_ATM_ENI_BURST_TX_4W 21151da177e4SLinus Torvalds " 4W" 21161da177e4SLinus Torvalds #endif 21171da177e4SLinus Torvalds #ifdef CONFIG_ATM_ENI_BURST_TX_2W 21181da177e4SLinus Torvalds " 2W" 21191da177e4SLinus Torvalds #endif 21201da177e4SLinus Torvalds ", RX" 21211da177e4SLinus Torvalds #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \ 21221da177e4SLinus Torvalds !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \ 21231da177e4SLinus Torvalds !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \ 21241da177e4SLinus Torvalds !defined(CONFIG_ATM_ENI_BURST_RX_2W) 21251da177e4SLinus Torvalds " none" 21261da177e4SLinus Torvalds #endif 21271da177e4SLinus Torvalds #ifdef CONFIG_ATM_ENI_BURST_RX_16W 21281da177e4SLinus Torvalds " 16W" 21291da177e4SLinus Torvalds #endif 21301da177e4SLinus Torvalds #ifdef CONFIG_ATM_ENI_BURST_RX_8W 21311da177e4SLinus Torvalds " 8W" 21321da177e4SLinus Torvalds #endif 21331da177e4SLinus Torvalds #ifdef CONFIG_ATM_ENI_BURST_RX_4W 21341da177e4SLinus Torvalds " 4W" 21351da177e4SLinus Torvalds #endif 21361da177e4SLinus Torvalds #ifdef CONFIG_ATM_ENI_BURST_RX_2W 21371da177e4SLinus Torvalds " 2W" 21381da177e4SLinus Torvalds #endif 21391da177e4SLinus Torvalds #ifndef CONFIG_ATM_ENI_TUNE_BURST 21401da177e4SLinus Torvalds " (default)" 21411da177e4SLinus Torvalds #endif 21421da177e4SLinus Torvalds "\n",""); 21431da177e4SLinus Torvalds if (!--left) 21441da177e4SLinus Torvalds return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n", 21451da177e4SLinus Torvalds "",eni_dev->tx_mult,eni_dev->rx_mult); 21461da177e4SLinus Torvalds for (i = 0; i < NR_CHAN; i++) { 21471da177e4SLinus Torvalds struct eni_tx *tx = eni_dev->tx+i; 21481da177e4SLinus Torvalds 21491da177e4SLinus Torvalds if (!tx->send) continue; 21501da177e4SLinus Torvalds if (!--left) { 21511da177e4SLinus Torvalds return sprintf(page,"tx[%d]: 0x%ld-0x%ld " 21521da177e4SLinus Torvalds "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i, 21531da177e4SLinus Torvalds (unsigned long) (tx->send - eni_dev->ram), 21541da177e4SLinus Torvalds tx->send-eni_dev->ram+tx->words*4-1,tx->words*4, 21551da177e4SLinus Torvalds tx->reserved,tx->shaping, 21561da177e4SLinus Torvalds tx == eni_dev->ubr ? " (UBR)" : ""); 21571da177e4SLinus Torvalds } 21581da177e4SLinus Torvalds if (--left) continue; 21591da177e4SLinus Torvalds return sprintf(page,"%10sbacklog %u packets\n","", 21601da177e4SLinus Torvalds skb_queue_len(&tx->backlog)); 21611da177e4SLinus Torvalds } 21621da177e4SLinus Torvalds read_lock(&vcc_sklist_lock); 21631da177e4SLinus Torvalds for(i = 0; i < VCC_HTABLE_SIZE; ++i) { 21641da177e4SLinus Torvalds struct hlist_head *head = &vcc_hash[i]; 21651da177e4SLinus Torvalds 21661da177e4SLinus Torvalds sk_for_each(s, node, head) { 21671da177e4SLinus Torvalds struct eni_vcc *eni_vcc; 21681da177e4SLinus Torvalds int length; 21691da177e4SLinus Torvalds 21701da177e4SLinus Torvalds vcc = atm_sk(s); 21711da177e4SLinus Torvalds if (vcc->dev != dev) 21721da177e4SLinus Torvalds continue; 21731da177e4SLinus Torvalds eni_vcc = ENI_VCC(vcc); 21741da177e4SLinus Torvalds if (--left) continue; 21751da177e4SLinus Torvalds length = sprintf(page,"vcc %4d: ",vcc->vci); 21761da177e4SLinus Torvalds if (eni_vcc->rx) { 21771da177e4SLinus Torvalds length += sprintf(page+length,"0x%ld-0x%ld " 21781da177e4SLinus Torvalds "(%6ld bytes)", 21791da177e4SLinus Torvalds (unsigned long) (eni_vcc->recv - eni_dev->ram), 21801da177e4SLinus Torvalds eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1, 21811da177e4SLinus Torvalds eni_vcc->words*4); 21821da177e4SLinus Torvalds if (eni_vcc->tx) length += sprintf(page+length,", "); 21831da177e4SLinus Torvalds } 21841da177e4SLinus Torvalds if (eni_vcc->tx) 21851da177e4SLinus Torvalds length += sprintf(page+length,"tx[%d], txing %d bytes", 21861da177e4SLinus Torvalds eni_vcc->tx->index,eni_vcc->txing); 21871da177e4SLinus Torvalds page[length] = '\n'; 21881da177e4SLinus Torvalds read_unlock(&vcc_sklist_lock); 21891da177e4SLinus Torvalds return length+1; 21901da177e4SLinus Torvalds } 21911da177e4SLinus Torvalds } 21921da177e4SLinus Torvalds read_unlock(&vcc_sklist_lock); 21931da177e4SLinus Torvalds for (i = 0; i < eni_dev->free_len; i++) { 21941da177e4SLinus Torvalds struct eni_free *fe = eni_dev->free_list+i; 21951da177e4SLinus Torvalds unsigned long offset; 21961da177e4SLinus Torvalds 21971da177e4SLinus Torvalds if (--left) continue; 21981da177e4SLinus Torvalds offset = (unsigned long) eni_dev->ram+eni_dev->base_diff; 21991da177e4SLinus Torvalds return sprintf(page,"free %p-%p (%6d bytes)\n", 22001da177e4SLinus Torvalds fe->start-offset,fe->start-offset+(1 << fe->order)-1, 22011da177e4SLinus Torvalds 1 << fe->order); 22021da177e4SLinus Torvalds } 22031da177e4SLinus Torvalds return 0; 22041da177e4SLinus Torvalds } 22051da177e4SLinus Torvalds 22061da177e4SLinus Torvalds 22071da177e4SLinus Torvalds static const struct atmdev_ops ops = { 22081da177e4SLinus Torvalds .open = eni_open, 22091da177e4SLinus Torvalds .close = eni_close, 22101da177e4SLinus Torvalds .ioctl = eni_ioctl, 22111da177e4SLinus Torvalds .getsockopt = eni_getsockopt, 22121da177e4SLinus Torvalds .setsockopt = eni_setsockopt, 22131da177e4SLinus Torvalds .send = eni_send, 22141da177e4SLinus Torvalds .phy_put = eni_phy_put, 22151da177e4SLinus Torvalds .phy_get = eni_phy_get, 22161da177e4SLinus Torvalds .change_qos = eni_change_qos, 22171da177e4SLinus Torvalds .proc_read = eni_proc_read 22181da177e4SLinus Torvalds }; 22191da177e4SLinus Torvalds 22201da177e4SLinus Torvalds 22211da177e4SLinus Torvalds static int __devinit eni_init_one(struct pci_dev *pci_dev, 22221da177e4SLinus Torvalds const struct pci_device_id *ent) 22231da177e4SLinus Torvalds { 22241da177e4SLinus Torvalds struct atm_dev *dev; 22251da177e4SLinus Torvalds struct eni_dev *eni_dev; 22261da177e4SLinus Torvalds int error = -ENOMEM; 22271da177e4SLinus Torvalds 22281da177e4SLinus Torvalds DPRINTK("eni_init_one\n"); 22291da177e4SLinus Torvalds 22301da177e4SLinus Torvalds if (pci_enable_device(pci_dev)) { 22311da177e4SLinus Torvalds error = -EIO; 22321da177e4SLinus Torvalds goto out0; 22331da177e4SLinus Torvalds } 22341da177e4SLinus Torvalds 22351da177e4SLinus Torvalds eni_dev = (struct eni_dev *) kmalloc(sizeof(struct eni_dev),GFP_KERNEL); 22361da177e4SLinus Torvalds if (!eni_dev) goto out0; 22371da177e4SLinus Torvalds if (!cpu_zeroes) { 22381da177e4SLinus Torvalds cpu_zeroes = pci_alloc_consistent(pci_dev,ENI_ZEROES_SIZE, 22391da177e4SLinus Torvalds &zeroes); 22401da177e4SLinus Torvalds if (!cpu_zeroes) goto out1; 22411da177e4SLinus Torvalds } 22421da177e4SLinus Torvalds dev = atm_dev_register(DEV_LABEL,&ops,-1,NULL); 22431da177e4SLinus Torvalds if (!dev) goto out2; 22441da177e4SLinus Torvalds pci_set_drvdata(pci_dev, dev); 22451da177e4SLinus Torvalds eni_dev->pci_dev = pci_dev; 22461da177e4SLinus Torvalds dev->dev_data = eni_dev; 22471da177e4SLinus Torvalds eni_dev->asic = ent->driver_data; 22481da177e4SLinus Torvalds error = eni_do_init(dev); 22491da177e4SLinus Torvalds if (error) goto out3; 22501da177e4SLinus Torvalds error = eni_start(dev); 22511da177e4SLinus Torvalds if (error) goto out3; 22521da177e4SLinus Torvalds eni_dev->more = eni_boards; 22531da177e4SLinus Torvalds eni_boards = dev; 22541da177e4SLinus Torvalds return 0; 22551da177e4SLinus Torvalds out3: 22561da177e4SLinus Torvalds atm_dev_deregister(dev); 22571da177e4SLinus Torvalds out2: 22581da177e4SLinus Torvalds pci_free_consistent(eni_dev->pci_dev,ENI_ZEROES_SIZE,cpu_zeroes,zeroes); 22591da177e4SLinus Torvalds cpu_zeroes = NULL; 22601da177e4SLinus Torvalds out1: 22611da177e4SLinus Torvalds kfree(eni_dev); 22621da177e4SLinus Torvalds out0: 22631da177e4SLinus Torvalds return error; 22641da177e4SLinus Torvalds } 22651da177e4SLinus Torvalds 22661da177e4SLinus Torvalds 22671da177e4SLinus Torvalds static struct pci_device_id eni_pci_tbl[] = { 22681da177e4SLinus Torvalds { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_FPGA, PCI_ANY_ID, PCI_ANY_ID, 22691da177e4SLinus Torvalds 0, 0, 0 /* FPGA */ }, 22701da177e4SLinus Torvalds { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_ASIC, PCI_ANY_ID, PCI_ANY_ID, 22711da177e4SLinus Torvalds 0, 0, 1 /* ASIC */ }, 22721da177e4SLinus Torvalds { 0, } 22731da177e4SLinus Torvalds }; 22741da177e4SLinus Torvalds MODULE_DEVICE_TABLE(pci,eni_pci_tbl); 22751da177e4SLinus Torvalds 22761da177e4SLinus Torvalds 22771da177e4SLinus Torvalds static void __devexit eni_remove_one(struct pci_dev *pci_dev) 22781da177e4SLinus Torvalds { 22791da177e4SLinus Torvalds /* grrr */ 22801da177e4SLinus Torvalds } 22811da177e4SLinus Torvalds 22821da177e4SLinus Torvalds 22831da177e4SLinus Torvalds static struct pci_driver eni_driver = { 22841da177e4SLinus Torvalds .name = DEV_LABEL, 22851da177e4SLinus Torvalds .id_table = eni_pci_tbl, 22861da177e4SLinus Torvalds .probe = eni_init_one, 22871da177e4SLinus Torvalds .remove = __devexit_p(eni_remove_one), 22881da177e4SLinus Torvalds }; 22891da177e4SLinus Torvalds 22901da177e4SLinus Torvalds 22911da177e4SLinus Torvalds static int __init eni_init(void) 22921da177e4SLinus Torvalds { 22931da177e4SLinus Torvalds struct sk_buff *skb; /* dummy for sizeof */ 22941da177e4SLinus Torvalds 22951da177e4SLinus Torvalds if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) { 22961da177e4SLinus Torvalds printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n", 22971da177e4SLinus Torvalds sizeof(skb->cb),sizeof(struct eni_skb_prv)); 22981da177e4SLinus Torvalds return -EIO; 22991da177e4SLinus Torvalds } 23001da177e4SLinus Torvalds return pci_register_driver(&eni_driver); 23011da177e4SLinus Torvalds } 23021da177e4SLinus Torvalds 23031da177e4SLinus Torvalds 23041da177e4SLinus Torvalds module_init(eni_init); 23051da177e4SLinus Torvalds /* @@@ since exit routine not defined, this module can not be unloaded */ 23061da177e4SLinus Torvalds 23071da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 2308