2323 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/* drivers/atm/eni.c - Efficient Networks ENI155P device driver */3 4/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */5 6 7#include <linux/module.h>8#include <linux/kernel.h>9#include <linux/mm.h>10#include <linux/pci.h>11#include <linux/errno.h>12#include <linux/atm.h>13#include <linux/atmdev.h>14#include <linux/sonet.h>15#include <linux/skbuff.h>16#include <linux/time.h>17#include <linux/delay.h>18#include <linux/uio.h>19#include <linux/init.h>20#include <linux/atm_eni.h>21#include <linux/bitops.h>22#include <linux/slab.h>23#include <asm/io.h>24#include <linux/atomic.h>25#include <linux/uaccess.h>26#include <asm/string.h>27#include <asm/byteorder.h>28 29#include "tonga.h"30#include "midway.h"31#include "suni.h"32#include "eni.h"33 34/*35 * TODO:36 *37 * Show stoppers38 * none39 *40 * Minor41 * - OAM support42 * - fix bugs listed below43 */44 45/*46 * KNOWN BUGS:47 *48 * - may run into JK-JK bug and deadlock49 * - should allocate UBR channel first50 * - buffer space allocation algorithm is stupid51 * (RX: should be maxSDU+maxdelay*rate52 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) )53 * - doesn't support OAM cells54 * - eni_put_free may hang if not putting memory fragments that _complete_55 * 2^n block (never happens in real life, though)56 */57 58 59#if 060#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)61#else62#define DPRINTK(format,args...)63#endif64 65 66#ifndef CONFIG_ATM_ENI_TUNE_BURST67#define CONFIG_ATM_ENI_BURST_TX_8W68#define CONFIG_ATM_ENI_BURST_RX_4W69#endif70 71 72#ifndef CONFIG_ATM_ENI_DEBUG73 74 75#define NULLCHECK(x)76 77#define EVENT(s,a,b)78 79 80static void event_dump(void)81{82}83 84 85#else86 87 88/* 89 * NULL pointer checking90 */91 92#define NULLCHECK(x) \93 if ((unsigned long) (x) < 0x30) \94 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))95 96/*97 * Very extensive activity logging. Greatly improves bug detection speed but98 * costs a few Mbps if enabled.99 */100 101#define EV 64102 103static const char *ev[EV];104static unsigned long ev_a[EV],ev_b[EV];105static int ec = 0;106 107 108static void EVENT(const char *s,unsigned long a,unsigned long b)109{110 ev[ec] = s; 111 ev_a[ec] = a;112 ev_b[ec] = b;113 ec = (ec+1) % EV;114}115 116 117static void event_dump(void)118{119 int n,i;120 121 for (n = 0; n < EV; n++) {122 i = (ec+n) % EV;123 printk(KERN_NOTICE);124 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);125 }126}127 128 129#endif /* CONFIG_ATM_ENI_DEBUG */130 131 132/*133 * NExx must not be equal at end134 * EExx may be equal at end135 * xxPJOK verify validity of pointer jumps136 * xxPMOK operating on a circular buffer of "c" words137 */138 139#define NEPJOK(a0,a1,b) \140 ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))141#define EEPJOK(a0,a1,b) \142 ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))143#define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)144#define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)145 146 147static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,148 backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,149 putting = 0;150 151static struct atm_dev *eni_boards = NULL;152 153/* Read/write registers on card */154#define eni_in(r) readl(eni_dev->reg+(r)*4)155#define eni_out(v,r) writel((v),eni_dev->reg+(r)*4)156 157 158/*-------------------------------- utilities --------------------------------*/159 160 161static void dump_mem(struct eni_dev *eni_dev)162{163 int i;164 165 for (i = 0; i < eni_dev->free_len; i++)166 printk(KERN_DEBUG " %d: %p %d\n",i,167 eni_dev->free_list[i].start,168 1 << eni_dev->free_list[i].order);169}170 171 172static void dump(struct atm_dev *dev)173{174 struct eni_dev *eni_dev;175 176 int i;177 178 eni_dev = ENI_DEV(dev);179 printk(KERN_NOTICE "Free memory\n");180 dump_mem(eni_dev);181 printk(KERN_NOTICE "TX buffers\n");182 for (i = 0; i < NR_CHAN; i++)183 if (eni_dev->tx[i].send)184 printk(KERN_NOTICE " TX %d @ %p: %ld\n",i,185 eni_dev->tx[i].send,eni_dev->tx[i].words*4);186 printk(KERN_NOTICE "RX buffers\n");187 for (i = 0; i < 1024; i++)188 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)189 printk(KERN_NOTICE " RX %d @ %p: %ld\n",i,190 ENI_VCC(eni_dev->rx_map[i])->recv,191 ENI_VCC(eni_dev->rx_map[i])->words*4);192 printk(KERN_NOTICE "----\n");193}194 195 196static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,197 unsigned long size)198{199 struct eni_free *list;200 int len,order;201 202 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);203 start += eni_dev->base_diff;204 list = eni_dev->free_list;205 len = eni_dev->free_len;206 while (size) {207 if (len >= eni_dev->free_list_size) {208 printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",209 start,size);210 break;211 }212 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);213 if (MID_MIN_BUF_SIZE > (1 << order)) {214 printk(KERN_CRIT "eni_put_free: order %d too small\n",215 order);216 break;217 }218 list[len].start = (void __iomem *) start;219 list[len].order = order;220 len++;221 start += 1 << order;222 size -= 1 << order;223 }224 eni_dev->free_len = len;225 /*dump_mem(eni_dev);*/226}227 228 229static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)230{231 struct eni_free *list;232 void __iomem *start;233 int len,i,order,best_order,index;234 235 list = eni_dev->free_list;236 len = eni_dev->free_len;237 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;238 if (*size > MID_MAX_BUF_SIZE) return NULL;239 for (order = 0; (1 << order) < *size; order++)240 ;241 DPRINTK("trying: %ld->%d\n",*size,order);242 best_order = 65; /* we don't have more than 2^64 of anything ... */243 index = 0; /* silence GCC */244 for (i = 0; i < len; i++)245 if (list[i].order == order) {246 best_order = order;247 index = i;248 break;249 }250 else if (best_order > list[i].order && list[i].order > order) {251 best_order = list[i].order;252 index = i;253 }254 if (best_order == 65) return NULL;255 start = list[index].start-eni_dev->base_diff;256 list[index] = list[--len];257 eni_dev->free_len = len;258 *size = 1 << order;259 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);260 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);261 memset_io(start,0,*size); /* never leak data */262 /*dump_mem(eni_dev);*/263 return start;264}265 266 267static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,268 unsigned long size)269{270 struct eni_free *list;271 int len,i,order;272 273 start += eni_dev->base_diff;274 list = eni_dev->free_list;275 len = eni_dev->free_len;276 for (order = -1; size; order++) size >>= 1;277 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);278 for (i = 0; i < len; i++)279 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&280 list[i].order == order) {281 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,282 list[i].start,start,1 << order,list[i].order,order);283 list[i] = list[--len];284 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));285 order++;286 i = -1;287 continue;288 }289 if (len >= eni_dev->free_list_size) {290 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,291 order);292 return;293 }294 list[len].start = start;295 list[len].order = order;296 eni_dev->free_len = len+1;297 /*dump_mem(eni_dev);*/298}299 300 301/*----------------------------------- RX ------------------------------------*/302 303 304#define ENI_VCC_NOS ((struct atm_vcc *) 1)305 306 307static void rx_ident_err(struct atm_vcc *vcc)308{309 struct atm_dev *dev;310 struct eni_dev *eni_dev;311 struct eni_vcc *eni_vcc;312 313 dev = vcc->dev;314 eni_dev = ENI_DEV(dev);315 /* immediately halt adapter */316 eni_out(eni_in(MID_MC_S) &317 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);318 /* dump useful information */319 eni_vcc = ENI_VCC(vcc);320 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "321 "mismatch\n",dev->number);322 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci,323 eni_vcc->rxing,eni_vcc->words);324 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value "325 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,326 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));327 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last,328 eni_vcc->servicing);329 EVENT("---dump ends here---\n",0,0);330 printk(KERN_NOTICE "---recent events---\n");331 event_dump();332 ENI_DEV(dev)->fast = NULL; /* really stop it */333 ENI_DEV(dev)->slow = NULL;334 skb_queue_head_init(&ENI_DEV(dev)->rx_queue);335}336 337 338static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,339 unsigned long skip,unsigned long size,unsigned long eff)340{341 struct eni_dev *eni_dev;342 struct eni_vcc *eni_vcc;343 u32 dma_rd,dma_wr;344 u32 dma[RX_DMA_BUF*2];345 dma_addr_t paddr;346 unsigned long here;347 int i,j;348 349 eni_dev = ENI_DEV(vcc->dev);350 eni_vcc = ENI_VCC(vcc);351 paddr = 0; /* GCC, shut up */352 if (skb) {353 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,354 DMA_FROM_DEVICE);355 if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))356 goto dma_map_error;357 ENI_PRV_PADDR(skb) = paddr;358 if (paddr & 3)359 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "360 "mis-aligned RX data (0x%lx)\n",vcc->dev->number,361 vcc->vci,(unsigned long) paddr);362 ENI_PRV_SIZE(skb) = size+skip;363 /* PDU plus descriptor */364 ATM_SKB(skb)->vcc = vcc;365 }366 j = 0;367 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */368 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);369 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci370 << MID_DMA_VCI_SHIFT) | MID_DT_JK;371 dma[j++] = 0;372 }373 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);374 if (!eff) size += skip;375 else {376 unsigned long words;377 378 if (!size) {379 DPRINTK("strange things happen ...\n");380 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",381 size,eff);382 }383 words = eff;384 if (paddr & 15) {385 unsigned long init;386 387 init = 4-((paddr & 15) >> 2);388 if (init > words) init = words;389 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |390 (vcc->vci << MID_DMA_VCI_SHIFT);391 dma[j++] = paddr;392 paddr += init << 2;393 words -= init;394 }395#ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */396 if (words & ~15) {397 dma[j++] = MID_DT_16W | ((words >> 4) <<398 MID_DMA_COUNT_SHIFT) | (vcc->vci <<399 MID_DMA_VCI_SHIFT);400 dma[j++] = paddr;401 paddr += (words & ~15) << 2;402 words &= 15;403 }404#endif405#ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */406 if (words & ~7) {407 dma[j++] = MID_DT_8W | ((words >> 3) <<408 MID_DMA_COUNT_SHIFT) | (vcc->vci <<409 MID_DMA_VCI_SHIFT);410 dma[j++] = paddr;411 paddr += (words & ~7) << 2;412 words &= 7;413 }414#endif415#ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */416 if (words & ~3) {417 dma[j++] = MID_DT_4W | ((words >> 2) <<418 MID_DMA_COUNT_SHIFT) | (vcc->vci <<419 MID_DMA_VCI_SHIFT);420 dma[j++] = paddr;421 paddr += (words & ~3) << 2;422 words &= 3;423 }424#endif425#ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */426 if (words & ~1) {427 dma[j++] = MID_DT_2W | ((words >> 1) <<428 MID_DMA_COUNT_SHIFT) | (vcc->vci <<429 MID_DMA_VCI_SHIFT);430 dma[j++] = paddr;431 paddr += (words & ~1) << 2;432 words &= 1;433 }434#endif435 if (words) {436 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)437 | (vcc->vci << MID_DMA_VCI_SHIFT);438 dma[j++] = paddr;439 }440 }441 if (size != eff) {442 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |443 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;444 dma[j++] = 0;445 }446 if (!j || j > 2*RX_DMA_BUF) {447 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");448 goto trouble;449 }450 dma[j-2] |= MID_DMA_END;451 j = j >> 1;452 dma_wr = eni_in(MID_DMA_WR_RX);453 dma_rd = eni_in(MID_DMA_RD_RX);454 /*455 * Can I move the dma_wr pointer by 2j+1 positions without overwriting456 * data that hasn't been read (position of dma_rd) yet ?457 */458 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */459 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",460 vcc->dev->number);461 goto trouble;462 }463 for (i = 0; i < j; i++) {464 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);465 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);466 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);467 }468 if (skb) {469 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;470 skb_queue_tail(&eni_dev->rx_queue,skb);471 eni_vcc->last = skb;472 rx_enqueued++;473 }474 eni_vcc->descr = here;475 eni_out(dma_wr,MID_DMA_WR_RX);476 return 0;477 478trouble:479 if (paddr)480 dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len,481 DMA_FROM_DEVICE);482dma_map_error:483 if (skb) dev_kfree_skb_irq(skb);484 return -1;485}486 487 488static void discard(struct atm_vcc *vcc,unsigned long size)489{490 struct eni_vcc *eni_vcc;491 492 eni_vcc = ENI_VCC(vcc);493 EVENT("discard (size=%ld)\n",size,0);494 while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);495 /* could do a full fallback, but that might be more expensive */496 if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;497 else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);498}499 500 501/*502 * TODO: should check whether direct copies (without DMA setup, dequeuing on503 * interrupt, etc.) aren't much faster for AAL0504 */505 506static int rx_aal0(struct atm_vcc *vcc)507{508 struct eni_vcc *eni_vcc;509 unsigned long descr;510 unsigned long length;511 struct sk_buff *skb;512 513 DPRINTK(">rx_aal0\n");514 eni_vcc = ENI_VCC(vcc);515 descr = readl(eni_vcc->recv+eni_vcc->descr*4);516 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {517 rx_ident_err(vcc);518 return 1;519 }520 if (descr & MID_RED_T) {521 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",522 vcc->dev->number);523 length = 0;524 atomic_inc(&vcc->stats->rx_err);525 }526 else {527 length = ATM_CELL_SIZE-1; /* no HEC */528 }529 skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;530 if (!skb) {531 discard(vcc,length >> 2);532 return 0;533 }534 skb_put(skb,length);535 skb->tstamp = eni_vcc->timestamp;536 DPRINTK("got len %ld\n",length);537 if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;538 eni_vcc->rxing++;539 return 0;540}541 542 543static int rx_aal5(struct atm_vcc *vcc)544{545 struct eni_vcc *eni_vcc;546 unsigned long descr;547 unsigned long size,eff,length;548 struct sk_buff *skb;549 550 EVENT("rx_aal5\n",0,0);551 DPRINTK(">rx_aal5\n");552 eni_vcc = ENI_VCC(vcc);553 descr = readl(eni_vcc->recv+eni_vcc->descr*4);554 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {555 rx_ident_err(vcc);556 return 1;557 }558 if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {559 if (descr & MID_RED_T) {560 EVENT("empty cell (descr=0x%lx)\n",descr,0);561 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",562 vcc->dev->number);563 size = 0;564 }565 else {566 static unsigned long silence = 0;567 568 if (time_after(jiffies, silence) || silence == 0) {569 printk(KERN_WARNING DEV_LABEL "(itf %d): "570 "discarding PDU(s) with CRC error\n",571 vcc->dev->number);572 silence = (jiffies+2*HZ)|1;573 }574 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);575 EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,576 size);577 }578 eff = length = 0;579 atomic_inc(&vcc->stats->rx_err);580 }581 else {582 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);583 DPRINTK("size=%ld\n",size);584 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &585 (eni_vcc->words-1)))*4) & 0xffff;586 /* -trailer(2)+header(1) */587 if (length && length <= (size << 2)-8 && length <=588 ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;589 else { /* ^ trailer length (8) */590 EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,591 length);592 printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "593 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",594 vcc->dev->number,vcc->vci,length,size << 2,descr);595 length = eff = 0;596 atomic_inc(&vcc->stats->rx_err);597 }598 }599 skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;600 if (!skb) {601 discard(vcc,size);602 return 0;603 }604 skb_put(skb,length);605 DPRINTK("got len %ld\n",length);606 if (do_rx_dma(vcc,skb,1,size,eff)) return 1;607 eni_vcc->rxing++;608 return 0;609}610 611 612static inline int rx_vcc(struct atm_vcc *vcc)613{614 void __iomem *vci_dsc;615 unsigned long tmp;616 struct eni_vcc *eni_vcc;617 618 eni_vcc = ENI_VCC(vcc);619 vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;620 EVENT("rx_vcc(1)\n",0,0);621 while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>622 MID_VCI_DESCR_SHIFT)) {623 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",624 eni_vcc->descr,tmp);625 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,626 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>627 MID_VCI_DESCR_SHIFT));628 if (ENI_VCC(vcc)->rx(vcc)) return 1;629 }630 /* clear IN_SERVICE flag */631 writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);632 /*633 * If new data has arrived between evaluating the while condition and634 * clearing IN_SERVICE, we wouldn't be notified until additional data635 * follows. So we have to loop again to be sure.636 */637 EVENT("rx_vcc(3)\n",0,0);638 while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)639 >> MID_VCI_DESCR_SHIFT)) {640 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",641 eni_vcc->descr,tmp);642 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,643 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>644 MID_VCI_DESCR_SHIFT));645 if (ENI_VCC(vcc)->rx(vcc)) return 1;646 }647 return 0;648}649 650 651static void poll_rx(struct atm_dev *dev)652{653 struct eni_dev *eni_dev;654 struct atm_vcc *curr;655 656 eni_dev = ENI_DEV(dev);657 while ((curr = eni_dev->fast)) {658 EVENT("poll_rx.fast\n",0,0);659 if (rx_vcc(curr)) return;660 eni_dev->fast = ENI_VCC(curr)->next;661 ENI_VCC(curr)->next = ENI_VCC_NOS;662 barrier();663 ENI_VCC(curr)->servicing--;664 }665 while ((curr = eni_dev->slow)) {666 EVENT("poll_rx.slow\n",0,0);667 if (rx_vcc(curr)) return;668 eni_dev->slow = ENI_VCC(curr)->next;669 ENI_VCC(curr)->next = ENI_VCC_NOS;670 barrier();671 ENI_VCC(curr)->servicing--;672 }673}674 675 676static void get_service(struct atm_dev *dev)677{678 struct eni_dev *eni_dev;679 struct atm_vcc *vcc;680 unsigned long vci;681 682 DPRINTK(">get_service\n");683 eni_dev = ENI_DEV(dev);684 while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {685 vci = readl(eni_dev->service+eni_dev->serv_read*4);686 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);687 vcc = eni_dev->rx_map[vci & 1023];688 if (!vcc) {689 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "690 "found\n",dev->number,vci);691 continue; /* nasty but we try to go on anyway */692 /* @@@ nope, doesn't work */693 }694 EVENT("getting from service\n",0,0);695 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {696 EVENT("double service\n",0,0);697 DPRINTK("Grr, servicing VCC %ld twice\n",vci);698 continue;699 }700 ENI_VCC(vcc)->timestamp = ktime_get_real();701 ENI_VCC(vcc)->next = NULL;702 if (vcc->qos.rxtp.traffic_class == ATM_CBR) {703 if (eni_dev->fast)704 ENI_VCC(eni_dev->last_fast)->next = vcc;705 else eni_dev->fast = vcc;706 eni_dev->last_fast = vcc;707 }708 else {709 if (eni_dev->slow)710 ENI_VCC(eni_dev->last_slow)->next = vcc;711 else eni_dev->slow = vcc;712 eni_dev->last_slow = vcc;713 }714 putting++;715 ENI_VCC(vcc)->servicing++;716 }717}718 719 720static void dequeue_rx(struct atm_dev *dev)721{722 struct eni_dev *eni_dev;723 struct eni_vcc *eni_vcc;724 struct atm_vcc *vcc;725 struct sk_buff *skb;726 void __iomem *vci_dsc;727 int first;728 729 eni_dev = ENI_DEV(dev);730 first = 1;731 while (1) {732 skb = skb_dequeue(&eni_dev->rx_queue);733 if (!skb) {734 if (first) {735 DPRINTK(DEV_LABEL "(itf %d): RX but not "736 "rxing\n",dev->number);737 EVENT("nothing to dequeue\n",0,0);738 }739 break;740 }741 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),742 ENI_PRV_POS(skb));743 rx_dequeued++;744 vcc = ATM_SKB(skb)->vcc;745 eni_vcc = ENI_VCC(vcc);746 first = 0;747 vci_dsc = eni_dev->vci+vcc->vci*16;748 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),749 (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,750 eni_vcc->words)) {751 EVENT("requeuing\n",0,0);752 skb_queue_head(&eni_dev->rx_queue,skb);753 break;754 }755 eni_vcc->rxing--;756 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);757 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,758 DMA_TO_DEVICE);759 if (!skb->len) dev_kfree_skb_irq(skb);760 else {761 EVENT("pushing (len=%ld)\n",skb->len,0);762 if (vcc->qos.aal == ATM_AAL0)763 *(unsigned long *) skb->data =764 ntohl(*(unsigned long *) skb->data);765 memset(skb->cb,0,sizeof(struct eni_skb_prv));766 vcc->push(vcc,skb);767 pushed++;768 }769 atomic_inc(&vcc->stats->rx);770 }771 wake_up(&eni_dev->rx_wait);772}773 774 775static int open_rx_first(struct atm_vcc *vcc)776{777 struct eni_dev *eni_dev;778 struct eni_vcc *eni_vcc;779 unsigned long size;780 781 DPRINTK("open_rx_first\n");782 eni_dev = ENI_DEV(vcc->dev);783 eni_vcc = ENI_VCC(vcc);784 eni_vcc->rx = NULL;785 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;786 size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;787 if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=788 MID_MAX_BUF_SIZE)789 size = MID_MAX_BUF_SIZE;790 eni_vcc->recv = eni_alloc_mem(eni_dev,&size);791 DPRINTK("rx at 0x%lx\n",eni_vcc->recv);792 eni_vcc->words = size >> 2;793 if (!eni_vcc->recv) return -ENOBUFS;794 eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;795 eni_vcc->descr = 0;796 eni_vcc->rx_pos = 0;797 eni_vcc->rxing = 0;798 eni_vcc->servicing = 0;799 eni_vcc->next = ENI_VCC_NOS;800 return 0;801}802 803 804static int open_rx_second(struct atm_vcc *vcc)805{806 void __iomem *here;807 struct eni_dev *eni_dev;808 struct eni_vcc *eni_vcc;809 unsigned long size;810 int order;811 812 DPRINTK("open_rx_second\n");813 eni_dev = ENI_DEV(vcc->dev);814 eni_vcc = ENI_VCC(vcc);815 if (!eni_vcc->rx) return 0;816 /* set up VCI descriptor */817 here = eni_dev->vci+vcc->vci*16;818 DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);819 size = eni_vcc->words >> 8;820 for (order = -1; size; order++) size >>= 1;821 writel(0,here+4); /* descr, read = 0 */822 writel(0,here+8); /* write, state, count = 0 */823 if (eni_dev->rx_map[vcc->vci])824 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "825 "in use\n",vcc->dev->number,vcc->vci);826 eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */827 writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<828 MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |829 (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<830 MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);831 return 0;832}833 834 835static void close_rx(struct atm_vcc *vcc)836{837 DECLARE_WAITQUEUE(wait,current);838 void __iomem *here;839 struct eni_dev *eni_dev;840 struct eni_vcc *eni_vcc;841 842 eni_vcc = ENI_VCC(vcc);843 if (!eni_vcc->rx) return;844 eni_dev = ENI_DEV(vcc->dev);845 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {846 here = eni_dev->vci+vcc->vci*16;847 /* block receiver */848 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<849 MID_VCI_MODE_SHIFT),here);850 /* wait for receiver to become idle */851 udelay(27);852 /* discard pending cell */853 writel(readl(here) & ~MID_VCI_IN_SERVICE,here);854 /* don't accept any new ones */855 eni_dev->rx_map[vcc->vci] = NULL;856 /* wait for RX queue to drain */857 DPRINTK("eni_close: waiting for RX ...\n");858 EVENT("RX closing\n",0,0);859 add_wait_queue(&eni_dev->rx_wait,&wait);860 set_current_state(TASK_UNINTERRUPTIBLE);861 barrier();862 for (;;) {863 /* transition service->rx: rxing++, servicing-- */864 if (!eni_vcc->servicing) {865 barrier();866 if (!eni_vcc->rxing) break;867 }868 EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,869 eni_vcc->servicing);870 printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,871 eni_vcc->rxing);872 schedule();873 set_current_state(TASK_UNINTERRUPTIBLE);874 }875 for (;;) {876 int at_end;877 u32 tmp;878 879 tasklet_disable(&eni_dev->task);880 tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;881 at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;882 tasklet_enable(&eni_dev->task);883 if (at_end) break;884 EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",885 eni_vcc->rx_pos,tmp);886 printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",887 eni_vcc->rx_pos,tmp);888 schedule();889 set_current_state(TASK_UNINTERRUPTIBLE);890 }891 set_current_state(TASK_RUNNING);892 remove_wait_queue(&eni_dev->rx_wait,&wait);893 }894 eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);895 eni_vcc->rx = NULL;896}897 898 899static int start_rx(struct atm_dev *dev)900{901 struct eni_dev *eni_dev;902 903 eni_dev = ENI_DEV(dev);904 eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);905 if (!eni_dev->rx_map) {906 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",907 dev->number);908 free_page((unsigned long) eni_dev->free_list);909 return -ENOMEM;910 }911 eni_dev->rx_mult = DEFAULT_RX_MULT;912 eni_dev->fast = eni_dev->last_fast = NULL;913 eni_dev->slow = eni_dev->last_slow = NULL;914 init_waitqueue_head(&eni_dev->rx_wait);915 skb_queue_head_init(&eni_dev->rx_queue);916 eni_dev->serv_read = eni_in(MID_SERV_WRITE);917 eni_out(0,MID_DMA_WR_RX);918 return 0;919}920 921 922/*----------------------------------- TX ------------------------------------*/923 924 925enum enq_res { enq_ok,enq_next,enq_jam };926 927 928static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,929 u32 size)930{931 u32 init,words;932 933 DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);934 EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);935#if 0 /* don't complain anymore */936 if (paddr & 3)937 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);938 if (size & 3)939 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);940#endif941 if (paddr & 3) {942 init = 4-(paddr & 3);943 if (init > size || size < 7) init = size;944 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",945 (unsigned long) paddr,init,size);946 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |947 (chan << MID_DMA_CHAN_SHIFT);948 dma[(*j)++] = paddr;949 paddr += init;950 size -= init;951 }952 words = size >> 2;953 size &= 3;954 if (words && (paddr & 31)) {955 init = 8-((paddr & 31) >> 2);956 if (init > words) init = words;957 DPRINTK("put_dma: %lx DMA: %d/%d words\n",958 (unsigned long) paddr,init,words);959 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |960 (chan << MID_DMA_CHAN_SHIFT);961 dma[(*j)++] = paddr;962 paddr += init << 2;963 words -= init;964 }965#ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */966 if (words & ~15) {967 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",968 (unsigned long) paddr,words >> 4,words);969 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)970 | (chan << MID_DMA_CHAN_SHIFT);971 dma[(*j)++] = paddr;972 paddr += (words & ~15) << 2;973 words &= 15;974 }975#endif976#ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */977 if (words & ~7) {978 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",979 (unsigned long) paddr,words >> 3,words);980 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)981 | (chan << MID_DMA_CHAN_SHIFT);982 dma[(*j)++] = paddr;983 paddr += (words & ~7) << 2;984 words &= 7;985 }986#endif987#ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */988 if (words & ~3) {989 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",990 (unsigned long) paddr,words >> 2,words);991 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)992 | (chan << MID_DMA_CHAN_SHIFT);993 dma[(*j)++] = paddr;994 paddr += (words & ~3) << 2;995 words &= 3;996 }997#endif998#ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */999 if (words & ~1) {1000 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",1001 (unsigned long) paddr,words >> 1,words);1002 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)1003 | (chan << MID_DMA_CHAN_SHIFT);1004 dma[(*j)++] = paddr;1005 paddr += (words & ~1) << 2;1006 words &= 1;1007 }1008#endif1009 if (words) {1010 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,1011 words);1012 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |1013 (chan << MID_DMA_CHAN_SHIFT);1014 dma[(*j)++] = paddr;1015 paddr += words << 2;1016 }1017 if (size) {1018 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,1019 size);1020 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |1021 (chan << MID_DMA_CHAN_SHIFT);1022 dma[(*j)++] = paddr;1023 }1024}1025 1026 1027static enum enq_res do_tx(struct sk_buff *skb)1028{1029 struct atm_vcc *vcc;1030 struct eni_dev *eni_dev;1031 struct eni_vcc *eni_vcc;1032 struct eni_tx *tx;1033 dma_addr_t paddr;1034 u32 dma_rd,dma_wr;1035 u32 size; /* in words */1036 int aal5,dma_size,i,j;1037 unsigned char skb_data3;1038 1039 DPRINTK(">do_tx\n");1040 NULLCHECK(skb);1041 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);1042 vcc = ATM_SKB(skb)->vcc;1043 NULLCHECK(vcc);1044 eni_dev = ENI_DEV(vcc->dev);1045 NULLCHECK(eni_dev);1046 eni_vcc = ENI_VCC(vcc);1047 tx = eni_vcc->tx;1048 NULLCHECK(tx);1049#if 0 /* Enable this for testing with the "align" program */1050 {1051 unsigned int hack = *((char *) skb->data)-'0';1052 1053 if (hack < 8) {1054 skb->data += hack;1055 skb->len -= hack;1056 }1057 }1058#endif1059#if 0 /* should work now */1060 if ((unsigned long) skb->data & 3)1061 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "1062 "TX data\n",vcc->dev->number,vcc->vci);1063#endif1064 /*1065 * Potential future IP speedup: make hard_header big enough to put1066 * segmentation descriptor directly into PDU. Saves: 4 slave writes,1067 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)1068 */1069 1070 aal5 = vcc->qos.aal == ATM_AAL5;1071 /* check space in buffer */1072 if (!aal5)1073 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;1074 /* cell without HEC plus segmentation header (includes1075 four-byte cell header) */1076 else {1077 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;1078 /* add AAL5 trailer */1079 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;1080 /* add segmentation header */1081 }1082 /*1083 * Can I move tx_pos by size bytes without getting closer than TX_GAP1084 * to the read pointer ? TX_GAP means to leave some space for what1085 * the manual calls "too close".1086 */1087 if (!NEPMOK(tx->tx_pos,size+TX_GAP,1088 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {1089 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",1090 vcc->dev->number,size);1091 return enq_next;1092 }1093 /* check DMA */1094 dma_wr = eni_in(MID_DMA_WR_TX);1095 dma_rd = eni_in(MID_DMA_RD_TX);1096 dma_size = 3; /* JK for descriptor and final fill, plus final size1097 mis-alignment fix */1098DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);1099 if (!skb_shinfo(skb)->nr_frags) dma_size += 5;1100 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);1101 if (dma_size > TX_DMA_BUF) {1102 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "1103 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);1104 }1105 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);1106 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <1107 dma_size) {1108 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",1109 vcc->dev->number);1110 return enq_jam;1111 }1112 skb_data3 = skb->data[3];1113 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,1114 DMA_TO_DEVICE);1115 if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))1116 return enq_next;1117 ENI_PRV_PADDR(skb) = paddr;1118 /* prepare DMA queue entries */1119 j = 0;1120 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<1121 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |1122 MID_DT_JK;1123 j++;1124 if (!skb_shinfo(skb)->nr_frags)1125 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);1126 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);1127 else {1128DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */1129 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)1130 if (i == -1)1131 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)1132 skb->data,1133 skb_headlen(skb));1134 else1135 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)1136 skb_frag_page(&skb_shinfo(skb)->frags[i]) +1137 skb_frag_off(&skb_shinfo(skb)->frags[i]),1138 skb_frag_size(&skb_shinfo(skb)->frags[i]));1139 }1140 if (skb->len & 3) {1141 put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma,1142 4 - (skb->len & 3));1143 }1144 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */1145 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<1146 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |1147 MID_DMA_END | MID_DT_JK;1148 j++;1149 DPRINTK("DMA at end: %d\n",j);1150 /* store frame */1151 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |1152 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |1153 (tx->resolution << MID_SEG_RATE_SHIFT) |1154 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);1155/*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/1156 writel((vcc->vci << MID_SEG_VCI_SHIFT) |1157 (aal5 ? 0 : (skb_data3 & 0xf)) |1158 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),1159 tx->send+((tx->tx_pos+1) & (tx->words-1))*4);1160 DPRINTK("size: %d, len:%d\n",size,skb->len);1161 if (aal5)1162 writel(skb->len,tx->send+1163 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);1164 j = j >> 1;1165 for (i = 0; i < j; i++) {1166 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);1167 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);1168 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);1169 }1170 ENI_PRV_POS(skb) = tx->tx_pos;1171 ENI_PRV_SIZE(skb) = size;1172 ENI_VCC(vcc)->txing += size;1173 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);1174 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);1175 eni_out(dma_wr,MID_DMA_WR_TX);1176 skb_queue_tail(&eni_dev->tx_queue,skb);1177 queued++;1178 return enq_ok;1179}1180 1181 1182static void poll_tx(struct atm_dev *dev)1183{1184 struct eni_tx *tx;1185 struct sk_buff *skb;1186 enum enq_res res;1187 int i;1188 1189 DPRINTK(">poll_tx\n");1190 for (i = NR_CHAN-1; i >= 0; i--) {1191 tx = &ENI_DEV(dev)->tx[i];1192 if (tx->send)1193 while ((skb = skb_dequeue(&tx->backlog))) {1194 res = do_tx(skb);1195 if (res == enq_ok) continue;1196 DPRINTK("re-queuing TX PDU\n");1197 skb_queue_head(&tx->backlog,skb);1198 requeued++;1199 if (res == enq_jam) return;1200 break;1201 }1202 }1203}1204 1205 1206static void dequeue_tx(struct atm_dev *dev)1207{1208 struct eni_dev *eni_dev;1209 struct atm_vcc *vcc;1210 struct sk_buff *skb;1211 struct eni_tx *tx;1212 1213 NULLCHECK(dev);1214 eni_dev = ENI_DEV(dev);1215 NULLCHECK(eni_dev);1216 while ((skb = skb_dequeue(&eni_dev->tx_queue))) {1217 vcc = ATM_SKB(skb)->vcc;1218 NULLCHECK(vcc);1219 tx = ENI_VCC(vcc)->tx;1220 NULLCHECK(ENI_VCC(vcc)->tx);1221 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),1222 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));1223 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==1224 eni_in(MID_TX_DESCRSTART(tx->index))) {1225 skb_queue_head(&eni_dev->tx_queue,skb);1226 break;1227 }1228 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);1229 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,1230 DMA_TO_DEVICE);1231 if (vcc->pop) vcc->pop(vcc,skb);1232 else dev_kfree_skb_irq(skb);1233 atomic_inc(&vcc->stats->tx);1234 wake_up(&eni_dev->tx_wait);1235 dma_complete++;1236 }1237}1238 1239 1240static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)1241{1242 int i;1243 1244 for (i = !ubr; i < NR_CHAN; i++)1245 if (!eni_dev->tx[i].send) return eni_dev->tx+i;1246 return NULL;1247}1248 1249 1250static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,1251 int *res,int unlimited)1252{1253 static const int pre_div[] = { 4,16,128,2048 };1254 /* 2^(((x+2)^2-(x+2))/2+1) */1255 1256 if (unlimited) *pre = *res = 0;1257 else {1258 if (*pcr > 0) {1259 int div;1260 1261 for (*pre = 0; *pre < 3; (*pre)++)1262 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;1263 div = pre_div[*pre]**pcr;1264 DPRINTK("min div %d\n",div);1265 *res = TS_CLOCK/div-1;1266 }1267 else {1268 int div;1269 1270 if (!*pcr) *pcr = eni_dev->tx_bw+reserved;1271 for (*pre = 3; *pre >= 0; (*pre)--)1272 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;1273 if (*pre < 3) (*pre)++; /* else fail later */1274 div = pre_div[*pre]*-*pcr;1275 DPRINTK("max div %d\n",div);1276 *res = DIV_ROUND_UP(TS_CLOCK, div)-1;1277 }1278 if (*res < 0) *res = 0;1279 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;1280 }1281 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);1282 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);1283 return 0;1284}1285 1286 1287static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,1288 int set_rsv,int set_shp)1289{1290 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);1291 struct eni_vcc *eni_vcc = ENI_VCC(vcc);1292 struct eni_tx *tx;1293 unsigned long size;1294 void __iomem *mem;1295 int rate,ubr,unlimited,new_tx;1296 int pre,res,order;1297 int error;1298 1299 rate = atm_pcr_goal(txtp);1300 ubr = txtp->traffic_class == ATM_UBR;1301 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||1302 rate >= ATM_OC3_PCR);1303 if (!unlimited) {1304 size = txtp->max_sdu*eni_dev->tx_mult/100;1305 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=1306 MID_MAX_BUF_SIZE)1307 size = MID_MAX_BUF_SIZE;1308 }1309 else {1310 if (eni_dev->ubr) {1311 eni_vcc->tx = eni_dev->ubr;1312 txtp->pcr = ATM_OC3_PCR;1313 return 0;1314 }1315 size = UBR_BUFFER;1316 }1317 new_tx = !eni_vcc->tx;1318 mem = NULL; /* for gcc */1319 if (!new_tx) tx = eni_vcc->tx;1320 else {1321 mem = eni_alloc_mem(eni_dev,&size);1322 if (!mem) return -ENOBUFS;1323 tx = alloc_tx(eni_dev,unlimited);1324 if (!tx) {1325 eni_free_mem(eni_dev,mem,size);1326 return -EBUSY;1327 }1328 DPRINTK("got chan %d\n",tx->index);1329 tx->reserved = tx->shaping = 0;1330 tx->send = mem;1331 tx->words = size >> 2;1332 skb_queue_head_init(&tx->backlog);1333 for (order = 0; size > (1 << (order+10)); order++);1334 eni_out((order << MID_SIZE_SHIFT) |1335 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),1336 MID_TX_PLACE(tx->index));1337 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &1338 MID_DESCR_START;1339 }1340 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);1341 if (!error && txtp->min_pcr > rate) error = -EINVAL;1342 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&1343 txtp->max_pcr < rate) error = -EINVAL;1344 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)1345 error = -EINVAL;1346 if (!error && set_rsv && !set_shp && rate < tx->shaping)1347 error = -EINVAL;1348 if (!error && !set_rsv && rate > tx->reserved && !ubr)1349 error = -EINVAL;1350 if (error) {1351 if (new_tx) {1352 tx->send = NULL;1353 eni_free_mem(eni_dev,mem,size);1354 }1355 return error;1356 }1357 txtp->pcr = rate;1358 if (set_rsv && !ubr) {1359 eni_dev->tx_bw += tx->reserved;1360 tx->reserved = rate;1361 eni_dev->tx_bw -= rate;1362 }1363 if (set_shp || (unlimited && new_tx)) {1364 if (unlimited && new_tx) eni_dev->ubr = tx;1365 tx->prescaler = pre;1366 tx->resolution = res;1367 tx->shaping = rate;1368 }1369 if (set_shp) eni_vcc->tx = tx;1370 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);1371 return 0;1372}1373 1374 1375static int open_tx_first(struct atm_vcc *vcc)1376{1377 ENI_VCC(vcc)->tx = NULL;1378 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;1379 ENI_VCC(vcc)->txing = 0;1380 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);1381}1382 1383 1384static int open_tx_second(struct atm_vcc *vcc)1385{1386 return 0; /* nothing to do */1387}1388 1389 1390static void close_tx(struct atm_vcc *vcc)1391{1392 DECLARE_WAITQUEUE(wait,current);1393 struct eni_dev *eni_dev;1394 struct eni_vcc *eni_vcc;1395 1396 eni_vcc = ENI_VCC(vcc);1397 if (!eni_vcc->tx) return;1398 eni_dev = ENI_DEV(vcc->dev);1399 /* wait for TX queue to drain */1400 DPRINTK("eni_close: waiting for TX ...\n");1401 add_wait_queue(&eni_dev->tx_wait,&wait);1402 set_current_state(TASK_UNINTERRUPTIBLE);1403 for (;;) {1404 int txing;1405 1406 tasklet_disable(&eni_dev->task);1407 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;1408 tasklet_enable(&eni_dev->task);1409 if (!txing) break;1410 DPRINTK("%d TX left\n",eni_vcc->txing);1411 schedule();1412 set_current_state(TASK_UNINTERRUPTIBLE);1413 }1414 set_current_state(TASK_RUNNING);1415 remove_wait_queue(&eni_dev->tx_wait,&wait);1416 if (eni_vcc->tx != eni_dev->ubr) {1417 /*1418 * Looping a few times in here is probably far cheaper than1419 * keeping track of TX completions all the time, so let's poll1420 * a bit ...1421 */1422 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=1423 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))1424 schedule();1425 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);1426 eni_vcc->tx->send = NULL;1427 eni_dev->tx_bw += eni_vcc->tx->reserved;1428 }1429 eni_vcc->tx = NULL;1430}1431 1432 1433static int start_tx(struct atm_dev *dev)1434{1435 struct eni_dev *eni_dev;1436 int i;1437 1438 eni_dev = ENI_DEV(dev);1439 eni_dev->lost = 0;1440 eni_dev->tx_bw = ATM_OC3_PCR;1441 eni_dev->tx_mult = DEFAULT_TX_MULT;1442 init_waitqueue_head(&eni_dev->tx_wait);1443 eni_dev->ubr = NULL;1444 skb_queue_head_init(&eni_dev->tx_queue);1445 eni_out(0,MID_DMA_WR_TX);1446 for (i = 0; i < NR_CHAN; i++) {1447 eni_dev->tx[i].send = NULL;1448 eni_dev->tx[i].index = i;1449 }1450 return 0;1451}1452 1453 1454/*--------------------------------- common ----------------------------------*/1455 1456 1457#if 0 /* may become useful again when tuning things */1458 1459static void foo(void)1460{1461printk(KERN_INFO1462 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"1463 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",1464 tx_complete,dma_complete,queued,requeued,submitted,backlogged,1465 rx_enqueued,rx_dequeued,putting,pushed);1466if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);1467}1468 1469#endif1470 1471 1472static void bug_int(struct atm_dev *dev,unsigned long reason)1473{1474 DPRINTK(">bug_int\n");1475 if (reason & MID_DMA_ERR_ACK)1476 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "1477 "error\n",dev->number);1478 if (reason & MID_TX_IDENT_MISM)1479 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "1480 "mismatch\n",dev->number);1481 if (reason & MID_TX_DMA_OVFL)1482 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "1483 "overflow\n",dev->number);1484 EVENT("---dump ends here---\n",0,0);1485 printk(KERN_NOTICE "---recent events---\n");1486 event_dump();1487}1488 1489 1490static irqreturn_t eni_int(int irq,void *dev_id)1491{1492 struct atm_dev *dev;1493 struct eni_dev *eni_dev;1494 u32 reason;1495 1496 DPRINTK(">eni_int\n");1497 dev = dev_id;1498 eni_dev = ENI_DEV(dev);1499 reason = eni_in(MID_ISA);1500 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);1501 /*1502 * Must handle these two right now, because reading ISA doesn't clear1503 * them, so they re-occur and we never make it to the tasklet. Since1504 * they're rare, we don't mind the occasional invocation of eni_tasklet1505 * with eni_dev->events == 0.1506 */1507 if (reason & MID_STAT_OVFL) {1508 EVENT("stat overflow\n",0,0);1509 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;1510 }1511 if (reason & MID_SUNI_INT) {1512 EVENT("SUNI int\n",0,0);1513 dev->phy->interrupt(dev);1514#if 01515 foo();1516#endif1517 }1518 spin_lock(&eni_dev->lock);1519 eni_dev->events |= reason;1520 spin_unlock(&eni_dev->lock);1521 tasklet_schedule(&eni_dev->task);1522 return IRQ_HANDLED;1523}1524 1525 1526static void eni_tasklet(unsigned long data)1527{1528 struct atm_dev *dev = (struct atm_dev *) data;1529 struct eni_dev *eni_dev = ENI_DEV(dev);1530 unsigned long flags;1531 u32 events;1532 1533 DPRINTK("eni_tasklet (dev %p)\n",dev);1534 spin_lock_irqsave(&eni_dev->lock,flags);1535 events = xchg(&eni_dev->events,0);1536 spin_unlock_irqrestore(&eni_dev->lock,flags);1537 if (events & MID_RX_DMA_COMPLETE) {1538 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);1539 dequeue_rx(dev);1540 EVENT("dequeue_rx done, starting poll_rx\n",0,0);1541 poll_rx(dev);1542 EVENT("poll_rx done\n",0,0);1543 /* poll_tx ? */1544 }1545 if (events & MID_SERVICE) {1546 EVENT("INT: service, starting get_service\n",0,0);1547 get_service(dev);1548 EVENT("get_service done, starting poll_rx\n",0,0);1549 poll_rx(dev);1550 EVENT("poll_rx done\n",0,0);1551 }1552 if (events & MID_TX_DMA_COMPLETE) {1553 EVENT("INT: TX DMA COMPLETE\n",0,0);1554 dequeue_tx(dev);1555 }1556 if (events & MID_TX_COMPLETE) {1557 EVENT("INT: TX COMPLETE\n",0,0);1558 tx_complete++;1559 wake_up(&eni_dev->tx_wait);1560 /* poll_rx ? */1561 }1562 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {1563 EVENT("bug interrupt\n",0,0);1564 bug_int(dev,events);1565 }1566 poll_tx(dev);1567}1568 1569 1570/*--------------------------------- entries ---------------------------------*/1571 1572 1573static char * const media_name[] = {1574 "MMF", "SMF", "MMF", "03?", /* 0- 3 */1575 "UTP", "05?", "06?", "07?", /* 4- 7 */1576 "TAXI","09?", "10?", "11?", /* 8-11 */1577 "12?", "13?", "14?", "15?", /* 12-15 */1578 "MMF", "SMF", "18?", "19?", /* 16-19 */1579 "UTP", "21?", "22?", "23?", /* 20-23 */1580 "24?", "25?", "26?", "27?", /* 24-27 */1581 "28?", "29?", "30?", "31?" /* 28-31 */1582};1583 1584 1585#define SET_SEPROM \1586 ({ if (!error && !pci_error) { \1587 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \1588 udelay(10); /* 10 usecs */ \1589 } })1590#define GET_SEPROM \1591 ({ if (!error && !pci_error) { \1592 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \1593 udelay(10); /* 10 usecs */ \1594 } })1595 1596 1597static int get_esi_asic(struct atm_dev *dev)1598{1599 struct eni_dev *eni_dev;1600 unsigned char tonga;1601 int error,failed,pci_error;1602 int address,i,j;1603 1604 eni_dev = ENI_DEV(dev);1605 error = pci_error = 0;1606 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;1607 SET_SEPROM;1608 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {1609 /* start operation */1610 tonga |= SEPROM_DATA;1611 SET_SEPROM;1612 tonga |= SEPROM_CLK;1613 SET_SEPROM;1614 tonga &= ~SEPROM_DATA;1615 SET_SEPROM;1616 tonga &= ~SEPROM_CLK;1617 SET_SEPROM;1618 /* send address */1619 address = ((i+SEPROM_ESI_BASE) << 1)+1;1620 for (j = 7; j >= 0; j--) {1621 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :1622 tonga & ~SEPROM_DATA;1623 SET_SEPROM;1624 tonga |= SEPROM_CLK;1625 SET_SEPROM;1626 tonga &= ~SEPROM_CLK;1627 SET_SEPROM;1628 }1629 /* get ack */1630 tonga |= SEPROM_DATA;1631 SET_SEPROM;1632 tonga |= SEPROM_CLK;1633 SET_SEPROM;1634 GET_SEPROM;1635 failed = tonga & SEPROM_DATA;1636 tonga &= ~SEPROM_CLK;1637 SET_SEPROM;1638 tonga |= SEPROM_DATA;1639 SET_SEPROM;1640 if (failed) error = -EIO;1641 else {1642 dev->esi[i] = 0;1643 for (j = 7; j >= 0; j--) {1644 dev->esi[i] <<= 1;1645 tonga |= SEPROM_DATA;1646 SET_SEPROM;1647 tonga |= SEPROM_CLK;1648 SET_SEPROM;1649 GET_SEPROM;1650 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;1651 tonga &= ~SEPROM_CLK;1652 SET_SEPROM;1653 tonga |= SEPROM_DATA;1654 SET_SEPROM;1655 }1656 /* get ack */1657 tonga |= SEPROM_DATA;1658 SET_SEPROM;1659 tonga |= SEPROM_CLK;1660 SET_SEPROM;1661 GET_SEPROM;1662 if (!(tonga & SEPROM_DATA)) error = -EIO;1663 tonga &= ~SEPROM_CLK;1664 SET_SEPROM;1665 tonga |= SEPROM_DATA;1666 SET_SEPROM;1667 }1668 /* stop operation */1669 tonga &= ~SEPROM_DATA;1670 SET_SEPROM;1671 tonga |= SEPROM_CLK;1672 SET_SEPROM;1673 tonga |= SEPROM_DATA;1674 SET_SEPROM;1675 }1676 if (pci_error) {1677 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "1678 "(0x%02x)\n",dev->number,pci_error);1679 error = -EIO;1680 }1681 return error;1682}1683 1684 1685#undef SET_SEPROM1686#undef GET_SEPROM1687 1688 1689static int get_esi_fpga(struct atm_dev *dev, void __iomem *base)1690{1691 void __iomem *mac_base;1692 int i;1693 1694 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);1695 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));1696 return 0;1697}1698 1699 1700static int eni_do_init(struct atm_dev *dev)1701{1702 struct midway_eprom __iomem *eprom;1703 struct eni_dev *eni_dev;1704 struct pci_dev *pci_dev;1705 unsigned long real_base;1706 void __iomem *base;1707 int error,i,last;1708 1709 DPRINTK(">eni_init\n");1710 dev->ci_range.vpi_bits = 0;1711 dev->ci_range.vci_bits = NR_VCI_LD;1712 dev->link_rate = ATM_OC3_PCR;1713 eni_dev = ENI_DEV(dev);1714 pci_dev = eni_dev->pci_dev;1715 real_base = pci_resource_start(pci_dev, 0);1716 eni_dev->irq = pci_dev->irq;1717 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,1718 PCI_COMMAND_MEMORY |1719 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {1720 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "1721 "(0x%02x)\n",dev->number,error);1722 return -EIO;1723 }1724 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",1725 dev->number,pci_dev->revision,real_base,eni_dev->irq);1726 if (!(base = ioremap(real_base,MAP_MAX_SIZE))) {1727 printk("\n");1728 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "1729 "mapping\n",dev->number);1730 return -ENOMEM;1731 }1732 eni_dev->ioaddr = base;1733 eni_dev->base_diff = real_base - (unsigned long) base;1734 /* id may not be present in ASIC Tonga boards - check this @@@ */1735 if (!eni_dev->asic) {1736 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));1737 if (readl(&eprom->magic) != ENI155_MAGIC) {1738 printk("\n");1739 printk(KERN_ERR DEV_LABEL1740 "(itf %d): bad magic - expected 0x%x, got 0x%x\n",1741 dev->number, ENI155_MAGIC,1742 (unsigned)readl(&eprom->magic));1743 error = -EINVAL;1744 goto unmap;1745 }1746 }1747 eni_dev->phy = base+PHY_BASE;1748 eni_dev->reg = base+REG_BASE;1749 eni_dev->ram = base+RAM_BASE;1750 last = MAP_MAX_SIZE-RAM_BASE;1751 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {1752 writel(0x55555555,eni_dev->ram+i);1753 if (readl(eni_dev->ram+i) != 0x55555555) last = i;1754 else {1755 writel(0xAAAAAAAA,eni_dev->ram+i);1756 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;1757 else writel(i,eni_dev->ram+i);1758 }1759 }1760 for (i = 0; i < last; i += RAM_INCREMENT)1761 if (readl(eni_dev->ram+i) != i) break;1762 eni_dev->mem = i;1763 memset_io(eni_dev->ram,0,eni_dev->mem);1764 /* TODO: should shrink allocation now */1765 printk("mem=%dkB (",eni_dev->mem >> 10);1766 /* TODO: check for non-SUNI, check for TAXI ? */1767 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {1768 printk(")\n");1769 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",1770 dev->number,(unsigned) eni_in(MID_RES_ID_MCON));1771 error = -EINVAL;1772 goto unmap;1773 }1774 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);1775 if (error)1776 goto unmap;1777 for (i = 0; i < ESI_LEN; i++)1778 printk("%s%02X",i ? "-" : "",dev->esi[i]);1779 printk(")\n");1780 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,1781 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",1782 media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]);1783 1784 error = suni_init(dev);1785 if (error)1786 goto unmap;1787out:1788 return error;1789unmap:1790 iounmap(base);1791 goto out;1792}1793 1794static void eni_do_release(struct atm_dev *dev)1795{1796 struct eni_dev *ed = ENI_DEV(dev);1797 1798 dev->phy->stop(dev);1799 dev->phy = NULL;1800 iounmap(ed->ioaddr);1801}1802 1803static int eni_start(struct atm_dev *dev)1804{1805 struct eni_dev *eni_dev;1806 1807 void __iomem *buf;1808 unsigned long buffer_mem;1809 int error;1810 1811 DPRINTK(">eni_start\n");1812 eni_dev = ENI_DEV(dev);1813 if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {1814 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",1815 dev->number,eni_dev->irq);1816 error = -EAGAIN;1817 goto out;1818 }1819 pci_set_master(eni_dev->pci_dev);1820 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,1821 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |1822 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {1823 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"1824 "master (0x%02x)\n",dev->number,error);1825 goto free_irq;1826 }1827 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,1828 END_SWAP_DMA))) {1829 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "1830 "(0x%02x)\n",dev->number,error);1831 goto free_irq;1832 }1833 /* determine addresses of internal tables */1834 eni_dev->vci = eni_dev->ram;1835 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;1836 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;1837 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;1838 buf = eni_dev->service+NR_SERVICE*4;1839 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",1840 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,1841 eni_dev->service,buf);1842 spin_lock_init(&eni_dev->lock);1843 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);1844 eni_dev->events = 0;1845 /* initialize memory management */1846 buffer_mem = eni_dev->mem - (buf - eni_dev->ram);1847 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;1848 eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1,1849 sizeof(*eni_dev->free_list),1850 GFP_KERNEL);1851 if (!eni_dev->free_list) {1852 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",1853 dev->number);1854 error = -ENOMEM;1855 goto free_irq;1856 }1857 eni_dev->free_len = 0;1858 eni_put_free(eni_dev,buf,buffer_mem);1859 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */1860 /*1861 * byte_addr free (k)1862 * 0x00000000 512 VCI table1863 * 0x00004000 496 RX DMA1864 * 0x00005000 492 TX DMA1865 * 0x00006000 488 service list1866 * 0x00007000 484 buffers1867 * 0x00080000 0 end (512kB)1868 */1869 eni_out(0xffffffff,MID_IE);1870 error = start_tx(dev);1871 if (error) goto free_list;1872 error = start_rx(dev);1873 if (error) goto free_list;1874 error = dev->phy->start(dev);1875 if (error) goto free_list;1876 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |1877 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,1878 MID_MC_S);1879 /* Tonga uses SBus INTReq1 */1880 (void) eni_in(MID_ISA); /* clear Midway interrupts */1881 return 0;1882 1883free_list:1884 kfree(eni_dev->free_list);1885 1886free_irq:1887 free_irq(eni_dev->irq, dev);1888 1889out:1890 return error;1891}1892 1893 1894static void eni_close(struct atm_vcc *vcc)1895{1896 DPRINTK(">eni_close\n");1897 if (!ENI_VCC(vcc)) return;1898 clear_bit(ATM_VF_READY,&vcc->flags);1899 close_rx(vcc);1900 close_tx(vcc);1901 DPRINTK("eni_close: done waiting\n");1902 /* deallocate memory */1903 kfree(ENI_VCC(vcc));1904 vcc->dev_data = NULL;1905 clear_bit(ATM_VF_ADDR,&vcc->flags);1906 /*foo();*/1907}1908 1909 1910static int eni_open(struct atm_vcc *vcc)1911{1912 struct eni_vcc *eni_vcc;1913 int error;1914 short vpi = vcc->vpi;1915 int vci = vcc->vci;1916 1917 DPRINTK(">eni_open\n");1918 EVENT("eni_open\n",0,0);1919 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))1920 vcc->dev_data = NULL;1921 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)1922 set_bit(ATM_VF_ADDR,&vcc->flags);1923 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)1924 return -EINVAL;1925 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,1926 vcc->vci);1927 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {1928 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);1929 if (!eni_vcc) return -ENOMEM;1930 vcc->dev_data = eni_vcc;1931 eni_vcc->tx = NULL; /* for eni_close after open_rx */1932 if ((error = open_rx_first(vcc))) {1933 eni_close(vcc);1934 return error;1935 }1936 if ((error = open_tx_first(vcc))) {1937 eni_close(vcc);1938 return error;1939 }1940 }1941 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;1942 if ((error = open_rx_second(vcc))) {1943 eni_close(vcc);1944 return error;1945 }1946 if ((error = open_tx_second(vcc))) {1947 eni_close(vcc);1948 return error;1949 }1950 set_bit(ATM_VF_READY,&vcc->flags);1951 /* should power down SUNI while !ref_count @@@ */1952 return 0;1953}1954 1955 1956static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)1957{1958 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);1959 struct eni_tx *tx = ENI_VCC(vcc)->tx;1960 struct sk_buff *skb;1961 int error,rate,rsv,shp;1962 1963 if (qos->txtp.traffic_class == ATM_NONE) return 0;1964 if (tx == eni_dev->ubr) return -EBADFD;1965 rate = atm_pcr_goal(&qos->txtp);1966 if (rate < 0) rate = -rate;1967 rsv = shp = 0;1968 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;1969 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;1970 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;1971 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;1972 if (!rsv && !shp) return 0;1973 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);1974 if (error) return error;1975 if (shp && !(flgs & ATM_MF_IMMED)) return 0;1976 /*1977 * Walk through the send buffer and patch the rate information in all1978 * segmentation buffer descriptors of this VCC.1979 */1980 tasklet_disable(&eni_dev->task);1981 skb_queue_walk(&eni_dev->tx_queue, skb) {1982 void __iomem *dsc;1983 1984 if (ATM_SKB(skb)->vcc != vcc) continue;1985 dsc = tx->send+ENI_PRV_POS(skb)*4;1986 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |1987 (tx->prescaler << MID_SEG_PR_SHIFT) |1988 (tx->resolution << MID_SEG_RATE_SHIFT), dsc);1989 }1990 tasklet_enable(&eni_dev->task);1991 return 0;1992}1993 1994 1995static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)1996{1997 struct eni_dev *eni_dev = ENI_DEV(dev);1998 1999 if (cmd == ENI_MEMDUMP) {2000 if (!capable(CAP_NET_ADMIN)) return -EPERM;2001 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "2002 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);2003 dump(dev);2004 return 0;2005 }2006 if (cmd == ENI_SETMULT) {2007 struct eni_multipliers mult;2008 2009 if (!capable(CAP_NET_ADMIN)) return -EPERM;2010 if (copy_from_user(&mult, arg,2011 sizeof(struct eni_multipliers)))2012 return -EFAULT;2013 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||2014 mult.tx > 65536 || mult.rx > 65536)2015 return -EINVAL;2016 if (mult.tx) eni_dev->tx_mult = mult.tx;2017 if (mult.rx) eni_dev->rx_mult = mult.rx;2018 return 0;2019 }2020 if (cmd == ATM_SETCIRANGE) {2021 struct atm_cirange ci;2022 2023 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))2024 return -EFAULT;2025 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&2026 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))2027 return 0;2028 return -EINVAL;2029 }2030 if (!dev->phy->ioctl) return -ENOIOCTLCMD;2031 return dev->phy->ioctl(dev,cmd,arg);2032}2033 2034static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)2035{2036 enum enq_res res;2037 2038 DPRINTK(">eni_send\n");2039 if (!ENI_VCC(vcc)->tx) {2040 if (vcc->pop) vcc->pop(vcc,skb);2041 else dev_kfree_skb(skb);2042 return -EINVAL;2043 }2044 if (!skb) {2045 printk(KERN_CRIT "!skb in eni_send ?\n");2046 if (vcc->pop) vcc->pop(vcc,skb);2047 return -EINVAL;2048 }2049 if (vcc->qos.aal == ATM_AAL0) {2050 if (skb->len != ATM_CELL_SIZE-1) {2051 if (vcc->pop) vcc->pop(vcc,skb);2052 else dev_kfree_skb(skb);2053 return -EINVAL;2054 }2055 *(u32 *) skb->data = htonl(*(u32 *) skb->data);2056 }2057 submitted++;2058 ATM_SKB(skb)->vcc = vcc;2059 tasklet_disable_in_atomic(&ENI_DEV(vcc->dev)->task);2060 res = do_tx(skb);2061 tasklet_enable(&ENI_DEV(vcc->dev)->task);2062 if (res == enq_ok) return 0;2063 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);2064 backlogged++;2065 tasklet_schedule(&ENI_DEV(vcc->dev)->task);2066 return 0;2067}2068 2069static void eni_phy_put(struct atm_dev *dev,unsigned char value,2070 unsigned long addr)2071{2072 writel(value,ENI_DEV(dev)->phy+addr*4);2073}2074 2075 2076 2077static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)2078{2079 return readl(ENI_DEV(dev)->phy+addr*4);2080}2081 2082 2083static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)2084{2085 struct sock *s;2086 static const char *signal[] = { "LOST","unknown","okay" };2087 struct eni_dev *eni_dev = ENI_DEV(dev);2088 struct atm_vcc *vcc;2089 int left,i;2090 2091 left = *pos;2092 if (!left)2093 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "2094 "%d cps remaining\n",dev->number,signal[(int) dev->signal],2095 eni_dev->mem >> 10,eni_dev->tx_bw);2096 if (!--left)2097 return sprintf(page,"%4sBursts: TX"2098#if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \2099 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \2100 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \2101 !defined(CONFIG_ATM_ENI_BURST_TX_2W)2102 " none"2103#endif2104#ifdef CONFIG_ATM_ENI_BURST_TX_16W2105 " 16W"2106#endif2107#ifdef CONFIG_ATM_ENI_BURST_TX_8W2108 " 8W"2109#endif2110#ifdef CONFIG_ATM_ENI_BURST_TX_4W2111 " 4W"2112#endif2113#ifdef CONFIG_ATM_ENI_BURST_TX_2W2114 " 2W"2115#endif2116 ", RX"2117#if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \2118 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \2119 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \2120 !defined(CONFIG_ATM_ENI_BURST_RX_2W)2121 " none"2122#endif2123#ifdef CONFIG_ATM_ENI_BURST_RX_16W2124 " 16W"2125#endif2126#ifdef CONFIG_ATM_ENI_BURST_RX_8W2127 " 8W"2128#endif2129#ifdef CONFIG_ATM_ENI_BURST_RX_4W2130 " 4W"2131#endif2132#ifdef CONFIG_ATM_ENI_BURST_RX_2W2133 " 2W"2134#endif2135#ifndef CONFIG_ATM_ENI_TUNE_BURST2136 " (default)"2137#endif2138 "\n","");2139 if (!--left) 2140 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",2141 "",eni_dev->tx_mult,eni_dev->rx_mult);2142 for (i = 0; i < NR_CHAN; i++) {2143 struct eni_tx *tx = eni_dev->tx+i;2144 2145 if (!tx->send) continue;2146 if (!--left) {2147 return sprintf(page, "tx[%d]: 0x%lx-0x%lx "2148 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,2149 (unsigned long) (tx->send - eni_dev->ram),2150 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,2151 tx->reserved,tx->shaping,2152 tx == eni_dev->ubr ? " (UBR)" : "");2153 }2154 if (--left) continue;2155 return sprintf(page,"%10sbacklog %u packets\n","",2156 skb_queue_len(&tx->backlog));2157 }2158 read_lock(&vcc_sklist_lock);2159 for(i = 0; i < VCC_HTABLE_SIZE; ++i) {2160 struct hlist_head *head = &vcc_hash[i];2161 2162 sk_for_each(s, head) {2163 struct eni_vcc *eni_vcc;2164 int length;2165 2166 vcc = atm_sk(s);2167 if (vcc->dev != dev)2168 continue;2169 eni_vcc = ENI_VCC(vcc);2170 if (--left) continue;2171 length = sprintf(page,"vcc %4d: ",vcc->vci);2172 if (eni_vcc->rx) {2173 length += sprintf(page+length, "0x%lx-0x%lx "2174 "(%6ld bytes)",2175 (unsigned long) (eni_vcc->recv - eni_dev->ram),2176 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,2177 eni_vcc->words*4);2178 if (eni_vcc->tx) length += sprintf(page+length,", ");2179 }2180 if (eni_vcc->tx)2181 length += sprintf(page+length,"tx[%d], txing %d bytes",2182 eni_vcc->tx->index,eni_vcc->txing);2183 page[length] = '\n';2184 read_unlock(&vcc_sklist_lock);2185 return length+1;2186 }2187 }2188 read_unlock(&vcc_sklist_lock);2189 for (i = 0; i < eni_dev->free_len; i++) {2190 struct eni_free *fe = eni_dev->free_list+i;2191 unsigned long offset;2192 2193 if (--left) continue;2194 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;2195 return sprintf(page,"free %p-%p (%6d bytes)\n",2196 fe->start-offset,fe->start-offset+(1 << fe->order)-1,2197 1 << fe->order);2198 }2199 return 0;2200}2201 2202 2203static const struct atmdev_ops ops = {2204 .open = eni_open,2205 .close = eni_close,2206 .ioctl = eni_ioctl,2207 .send = eni_send,2208 .phy_put = eni_phy_put,2209 .phy_get = eni_phy_get,2210 .change_qos = eni_change_qos,2211 .proc_read = eni_proc_read2212};2213 2214 2215static int eni_init_one(struct pci_dev *pci_dev,2216 const struct pci_device_id *ent)2217{2218 struct atm_dev *dev;2219 struct eni_dev *eni_dev;2220 struct eni_zero *zero;2221 int rc;2222 2223 rc = pci_enable_device(pci_dev);2224 if (rc < 0)2225 goto out;2226 2227 rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32));2228 if (rc < 0)2229 goto err_disable;2230 2231 rc = -ENOMEM;2232 eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);2233 if (!eni_dev)2234 goto err_disable;2235 2236 zero = &eni_dev->zero;2237 zero->addr = dma_alloc_coherent(&pci_dev->dev,2238 ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL);2239 if (!zero->addr)2240 goto err_kfree;2241 2242 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);2243 if (!dev)2244 goto err_free_consistent;2245 2246 dev->dev_data = eni_dev;2247 pci_set_drvdata(pci_dev, dev);2248 eni_dev->pci_dev = pci_dev;2249 eni_dev->asic = ent->driver_data;2250 2251 rc = eni_do_init(dev);2252 if (rc < 0)2253 goto err_unregister;2254 2255 rc = eni_start(dev);2256 if (rc < 0)2257 goto err_eni_release;2258 2259 eni_dev->more = eni_boards;2260 eni_boards = dev;2261out:2262 return rc;2263 2264err_eni_release:2265 dev->phy = NULL;2266 iounmap(ENI_DEV(dev)->ioaddr);2267err_unregister:2268 atm_dev_deregister(dev);2269err_free_consistent:2270 dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);2271err_kfree:2272 kfree(eni_dev);2273err_disable:2274 pci_disable_device(pci_dev);2275 goto out;2276}2277 2278 2279static const struct pci_device_id eni_pci_tbl[] = {2280 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },2281 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },2282 { 0, }2283};2284MODULE_DEVICE_TABLE(pci,eni_pci_tbl);2285 2286 2287static void eni_remove_one(struct pci_dev *pdev)2288{2289 struct atm_dev *dev = pci_get_drvdata(pdev);2290 struct eni_dev *ed = ENI_DEV(dev);2291 struct eni_zero *zero = &ed->zero;2292 2293 eni_do_release(dev);2294 atm_dev_deregister(dev);2295 dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);2296 kfree(ed);2297 pci_disable_device(pdev);2298}2299 2300 2301static struct pci_driver eni_driver = {2302 .name = DEV_LABEL,2303 .id_table = eni_pci_tbl,2304 .probe = eni_init_one,2305 .remove = eni_remove_one,2306};2307 2308 2309static int __init eni_init(void)2310{2311 struct sk_buff *skb; /* dummy for sizeof */2312 2313 BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv));2314 return pci_register_driver(&eni_driver);2315}2316 2317 2318module_init(eni_init);2319/* @@@ since exit routine not defined, this module can not be unloaded */2320 2321MODULE_DESCRIPTION("Efficient Networks ENI155P ATM NIC driver");2322MODULE_LICENSE("GPL");2323