2006-09-21 02:36:48 +08:00
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/* Copyright (c) 2006 Coraid, Inc. See COPYING for GPL terms. */
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2005-04-17 06:20:36 +08:00
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/*
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* aoecmd.c
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* Filesystem request handling methods
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*/
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#include <linux/hdreg.h>
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#include <linux/blkdev.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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2006-01-20 02:46:19 +08:00
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#include <linux/genhd.h>
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2005-09-30 00:47:40 +08:00
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#include <asm/unaligned.h>
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2005-04-17 06:20:36 +08:00
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#include "aoe.h"
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#define TIMERTICK (HZ / 10)
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#define MINTIMER (2 * TIMERTICK)
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#define MAXTIMER (HZ << 1)
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#define MAXWAIT (60 * 3) /* After MAXWAIT seconds, give up and fail dev */
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2006-09-21 02:36:49 +08:00
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struct sk_buff *
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new_skb(ulong len)
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2005-04-17 06:20:36 +08:00
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{
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struct sk_buff *skb;
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skb = alloc_skb(len, GFP_ATOMIC);
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if (skb) {
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skb->nh.raw = skb->mac.raw = skb->data;
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skb->protocol = __constant_htons(ETH_P_AOE);
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skb->priority = 0;
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skb_put(skb, len);
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2006-01-20 01:37:24 +08:00
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memset(skb->head, 0, len);
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2005-04-17 06:20:36 +08:00
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skb->next = skb->prev = NULL;
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/* tell the network layer not to perform IP checksums
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* or to get the NIC to do it
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*/
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skb->ip_summed = CHECKSUM_NONE;
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}
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return skb;
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}
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static struct frame *
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getframe(struct aoedev *d, int tag)
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{
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struct frame *f, *e;
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f = d->frames;
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e = f + d->nframes;
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for (; f<e; f++)
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if (f->tag == tag)
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return f;
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return NULL;
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}
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/*
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* Leave the top bit clear so we have tagspace for userland.
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* The bottom 16 bits are the xmit tick for rexmit/rttavg processing.
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* This driver reserves tag -1 to mean "unused frame."
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*/
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static int
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newtag(struct aoedev *d)
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{
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register ulong n;
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n = jiffies & 0xffff;
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return n |= (++d->lasttag & 0x7fff) << 16;
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}
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static int
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aoehdr_atainit(struct aoedev *d, struct aoe_hdr *h)
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{
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u32 host_tag = newtag(d);
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memcpy(h->src, d->ifp->dev_addr, sizeof h->src);
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memcpy(h->dst, d->addr, sizeof h->dst);
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2005-04-19 13:00:20 +08:00
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h->type = __constant_cpu_to_be16(ETH_P_AOE);
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2005-04-17 06:20:36 +08:00
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h->verfl = AOE_HVER;
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2005-04-19 13:00:20 +08:00
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h->major = cpu_to_be16(d->aoemajor);
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2005-04-17 06:20:36 +08:00
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h->minor = d->aoeminor;
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h->cmd = AOECMD_ATA;
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2005-04-19 13:00:20 +08:00
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h->tag = cpu_to_be32(host_tag);
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2005-04-17 06:20:36 +08:00
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return host_tag;
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}
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2006-09-21 02:36:49 +08:00
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static inline void
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put_lba(struct aoe_atahdr *ah, sector_t lba)
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{
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ah->lba0 = lba;
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ah->lba1 = lba >>= 8;
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ah->lba2 = lba >>= 8;
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ah->lba3 = lba >>= 8;
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ah->lba4 = lba >>= 8;
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ah->lba5 = lba >>= 8;
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}
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2005-04-17 06:20:36 +08:00
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static void
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aoecmd_ata_rw(struct aoedev *d, struct frame *f)
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{
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struct aoe_hdr *h;
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struct aoe_atahdr *ah;
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struct buf *buf;
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struct sk_buff *skb;
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ulong bcnt;
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register sector_t sector;
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char writebit, extbit;
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writebit = 0x10;
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extbit = 0x4;
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buf = d->inprocess;
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sector = buf->sector;
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bcnt = buf->bv_resid;
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2006-09-21 02:36:49 +08:00
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if (bcnt > d->maxbcnt)
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bcnt = d->maxbcnt;
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2005-04-17 06:20:36 +08:00
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/* initialize the headers & frame */
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2006-09-21 02:36:49 +08:00
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skb = f->skb;
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h = (struct aoe_hdr *) skb->mac.raw;
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2005-04-17 06:20:36 +08:00
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ah = (struct aoe_atahdr *) (h+1);
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2006-09-21 02:36:49 +08:00
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skb->len = sizeof *h + sizeof *ah;
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memset(h, 0, skb->len);
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2005-04-17 06:20:36 +08:00
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f->tag = aoehdr_atainit(d, h);
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f->waited = 0;
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f->buf = buf;
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f->bufaddr = buf->bufaddr;
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2006-09-21 02:36:49 +08:00
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f->bcnt = bcnt;
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f->lba = sector;
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2005-04-17 06:20:36 +08:00
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/* set up ata header */
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ah->scnt = bcnt >> 9;
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2006-09-21 02:36:49 +08:00
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put_lba(ah, sector);
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2005-04-17 06:20:36 +08:00
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if (d->flags & DEVFL_EXT) {
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ah->aflags |= AOEAFL_EXT;
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} else {
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extbit = 0;
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ah->lba3 &= 0x0f;
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ah->lba3 |= 0xe0; /* LBA bit + obsolete 0xa0 */
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}
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if (bio_data_dir(buf->bio) == WRITE) {
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2006-09-21 02:36:49 +08:00
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skb_fill_page_desc(skb, 0, virt_to_page(f->bufaddr),
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offset_in_page(f->bufaddr), bcnt);
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2005-04-17 06:20:36 +08:00
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ah->aflags |= AOEAFL_WRITE;
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} else {
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2006-09-21 02:36:49 +08:00
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skb_shinfo(skb)->nr_frags = 0;
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skb->len = ETH_ZLEN;
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2005-04-17 06:20:36 +08:00
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writebit = 0;
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}
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ah->cmdstat = WIN_READ | writebit | extbit;
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/* mark all tracking fields and load out */
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buf->nframesout += 1;
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buf->bufaddr += bcnt;
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buf->bv_resid -= bcnt;
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2006-09-21 02:36:49 +08:00
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/* dprintk("bv_resid=%ld\n", buf->bv_resid); */
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2005-04-17 06:20:36 +08:00
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buf->resid -= bcnt;
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buf->sector += bcnt >> 9;
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if (buf->resid == 0) {
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d->inprocess = NULL;
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} else if (buf->bv_resid == 0) {
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buf->bv++;
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buf->bv_resid = buf->bv->bv_len;
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buf->bufaddr = page_address(buf->bv->bv_page) + buf->bv->bv_offset;
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}
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2006-09-21 02:36:49 +08:00
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skb->dev = d->ifp;
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skb_get(skb);
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skb->next = NULL;
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if (d->sendq_hd)
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d->sendq_tl->next = skb;
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else
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d->sendq_hd = skb;
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d->sendq_tl = skb;
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2005-04-17 06:20:36 +08:00
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}
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2006-01-20 02:46:19 +08:00
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/* some callers cannot sleep, and they can call this function,
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* transmitting the packets later, when interrupts are on
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*/
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static struct sk_buff *
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aoecmd_cfg_pkts(ushort aoemajor, unsigned char aoeminor, struct sk_buff **tail)
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{
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struct aoe_hdr *h;
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struct aoe_cfghdr *ch;
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struct sk_buff *skb, *sl, *sl_tail;
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struct net_device *ifp;
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sl = sl_tail = NULL;
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read_lock(&dev_base_lock);
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for (ifp = dev_base; ifp; dev_put(ifp), ifp = ifp->next) {
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dev_hold(ifp);
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if (!is_aoe_netif(ifp))
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continue;
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2006-09-21 02:36:49 +08:00
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skb = new_skb(sizeof *h + sizeof *ch);
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2006-01-20 02:46:19 +08:00
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if (skb == NULL) {
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2006-09-21 02:36:49 +08:00
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iprintk("skb alloc failure\n");
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2006-01-20 02:46:19 +08:00
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continue;
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}
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2006-09-21 02:36:49 +08:00
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skb->dev = ifp;
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2006-01-20 02:46:19 +08:00
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if (sl_tail == NULL)
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sl_tail = skb;
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h = (struct aoe_hdr *) skb->mac.raw;
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memset(h, 0, sizeof *h + sizeof *ch);
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memset(h->dst, 0xff, sizeof h->dst);
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memcpy(h->src, ifp->dev_addr, sizeof h->src);
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h->type = __constant_cpu_to_be16(ETH_P_AOE);
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h->verfl = AOE_HVER;
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h->major = cpu_to_be16(aoemajor);
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h->minor = aoeminor;
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h->cmd = AOECMD_CFG;
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skb->next = sl;
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sl = skb;
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}
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read_unlock(&dev_base_lock);
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if (tail != NULL)
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*tail = sl_tail;
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return sl;
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}
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2005-04-17 06:20:36 +08:00
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/* enters with d->lock held */
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void
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aoecmd_work(struct aoedev *d)
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{
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struct frame *f;
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struct buf *buf;
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2006-01-20 02:46:19 +08:00
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if (d->flags & DEVFL_PAUSE) {
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if (!aoedev_isbusy(d))
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d->sendq_hd = aoecmd_cfg_pkts(d->aoemajor,
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d->aoeminor, &d->sendq_tl);
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return;
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}
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2005-04-17 06:20:36 +08:00
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loop:
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f = getframe(d, FREETAG);
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if (f == NULL)
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return;
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if (d->inprocess == NULL) {
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if (list_empty(&d->bufq))
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return;
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buf = container_of(d->bufq.next, struct buf, bufs);
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list_del(d->bufq.next);
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2006-09-21 02:36:49 +08:00
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/*dprintk("bi_size=%ld\n", buf->bio->bi_size); */
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2005-04-17 06:20:36 +08:00
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d->inprocess = buf;
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}
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aoecmd_ata_rw(d, f);
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goto loop;
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}
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static void
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rexmit(struct aoedev *d, struct frame *f)
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{
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struct sk_buff *skb;
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struct aoe_hdr *h;
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2006-09-21 02:36:49 +08:00
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struct aoe_atahdr *ah;
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2005-04-17 06:20:36 +08:00
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char buf[128];
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u32 n;
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n = newtag(d);
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snprintf(buf, sizeof buf,
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"%15s e%ld.%ld oldtag=%08x@%08lx newtag=%08x\n",
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"retransmit",
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d->aoemajor, d->aoeminor, f->tag, jiffies, n);
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aoechr_error(buf);
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2006-09-21 02:36:49 +08:00
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skb = f->skb;
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h = (struct aoe_hdr *) skb->mac.raw;
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2006-09-21 02:36:49 +08:00
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ah = (struct aoe_atahdr *) (h+1);
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2005-04-17 06:20:36 +08:00
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f->tag = n;
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2005-04-19 13:00:20 +08:00
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h->tag = cpu_to_be32(n);
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2006-01-20 02:46:25 +08:00
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memcpy(h->dst, d->addr, sizeof h->dst);
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memcpy(h->src, d->ifp->dev_addr, sizeof h->src);
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2005-04-17 06:20:36 +08:00
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2006-09-21 02:36:49 +08:00
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n = DEFAULTBCNT / 512;
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if (ah->scnt > n) {
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ah->scnt = n;
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if (ah->aflags & AOEAFL_WRITE)
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skb_fill_page_desc(skb, 0, virt_to_page(f->bufaddr),
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offset_in_page(f->bufaddr), DEFAULTBCNT);
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if (++d->lostjumbo > (d->nframes << 1))
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if (d->maxbcnt != DEFAULTBCNT) {
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2006-09-21 02:36:49 +08:00
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iprintk("too many lost jumbo - using 1KB frames.\n");
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2006-09-21 02:36:49 +08:00
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d->maxbcnt = DEFAULTBCNT;
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d->flags |= DEVFL_MAXBCNT;
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}
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}
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2006-09-21 02:36:49 +08:00
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skb->dev = d->ifp;
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skb_get(skb);
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skb->next = NULL;
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if (d->sendq_hd)
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d->sendq_tl->next = skb;
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else
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d->sendq_hd = skb;
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d->sendq_tl = skb;
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2005-04-17 06:20:36 +08:00
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}
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static int
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tsince(int tag)
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{
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int n;
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n = jiffies & 0xffff;
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n -= tag & 0xffff;
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if (n < 0)
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n += 1<<16;
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return n;
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}
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static void
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rexmit_timer(ulong vp)
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{
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struct aoedev *d;
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struct frame *f, *e;
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struct sk_buff *sl;
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register long timeout;
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ulong flags, n;
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d = (struct aoedev *) vp;
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sl = NULL;
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/* timeout is always ~150% of the moving average */
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timeout = d->rttavg;
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timeout += timeout >> 1;
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spin_lock_irqsave(&d->lock, flags);
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if (d->flags & DEVFL_TKILL) {
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2006-01-26 02:54:44 +08:00
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|
spin_unlock_irqrestore(&d->lock, flags);
|
2005-04-17 06:20:36 +08:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
f = d->frames;
|
|
|
|
e = f + d->nframes;
|
|
|
|
for (; f<e; f++) {
|
|
|
|
if (f->tag != FREETAG && tsince(f->tag) >= timeout) {
|
|
|
|
n = f->waited += timeout;
|
|
|
|
n /= HZ;
|
|
|
|
if (n > MAXWAIT) { /* waited too long. device failure. */
|
|
|
|
aoedev_downdev(d);
|
2006-01-26 02:54:44 +08:00
|
|
|
break;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
rexmit(d, f);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-04-19 13:00:22 +08:00
|
|
|
sl = d->sendq_hd;
|
|
|
|
d->sendq_hd = d->sendq_tl = NULL;
|
2005-04-17 06:20:36 +08:00
|
|
|
if (sl) {
|
|
|
|
n = d->rttavg <<= 1;
|
|
|
|
if (n > MAXTIMER)
|
|
|
|
d->rttavg = MAXTIMER;
|
|
|
|
}
|
|
|
|
|
|
|
|
d->timer.expires = jiffies + TIMERTICK;
|
|
|
|
add_timer(&d->timer);
|
|
|
|
|
|
|
|
spin_unlock_irqrestore(&d->lock, flags);
|
|
|
|
|
|
|
|
aoenet_xmit(sl);
|
|
|
|
}
|
|
|
|
|
2006-01-20 02:46:19 +08:00
|
|
|
/* this function performs work that has been deferred until sleeping is OK
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
aoecmd_sleepwork(void *vp)
|
|
|
|
{
|
|
|
|
struct aoedev *d = (struct aoedev *) vp;
|
|
|
|
|
|
|
|
if (d->flags & DEVFL_GDALLOC)
|
|
|
|
aoeblk_gdalloc(d);
|
|
|
|
|
|
|
|
if (d->flags & DEVFL_NEWSIZE) {
|
|
|
|
struct block_device *bd;
|
|
|
|
unsigned long flags;
|
|
|
|
u64 ssize;
|
|
|
|
|
|
|
|
ssize = d->gd->capacity;
|
|
|
|
bd = bdget_disk(d->gd, 0);
|
|
|
|
|
|
|
|
if (bd) {
|
|
|
|
mutex_lock(&bd->bd_inode->i_mutex);
|
|
|
|
i_size_write(bd->bd_inode, (loff_t)ssize<<9);
|
|
|
|
mutex_unlock(&bd->bd_inode->i_mutex);
|
|
|
|
bdput(bd);
|
|
|
|
}
|
|
|
|
spin_lock_irqsave(&d->lock, flags);
|
|
|
|
d->flags |= DEVFL_UP;
|
|
|
|
d->flags &= ~DEVFL_NEWSIZE;
|
|
|
|
spin_unlock_irqrestore(&d->lock, flags);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
static void
|
|
|
|
ataid_complete(struct aoedev *d, unsigned char *id)
|
|
|
|
{
|
|
|
|
u64 ssize;
|
|
|
|
u16 n;
|
|
|
|
|
|
|
|
/* word 83: command set supported */
|
2005-09-30 00:47:40 +08:00
|
|
|
n = le16_to_cpu(get_unaligned((__le16 *) &id[83<<1]));
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* word 86: command set/feature enabled */
|
2005-09-30 00:47:40 +08:00
|
|
|
n |= le16_to_cpu(get_unaligned((__le16 *) &id[86<<1]));
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
if (n & (1<<10)) { /* bit 10: LBA 48 */
|
|
|
|
d->flags |= DEVFL_EXT;
|
|
|
|
|
|
|
|
/* word 100: number lba48 sectors */
|
2005-09-30 00:47:40 +08:00
|
|
|
ssize = le64_to_cpu(get_unaligned((__le64 *) &id[100<<1]));
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* set as in ide-disk.c:init_idedisk_capacity */
|
|
|
|
d->geo.cylinders = ssize;
|
|
|
|
d->geo.cylinders /= (255 * 63);
|
|
|
|
d->geo.heads = 255;
|
|
|
|
d->geo.sectors = 63;
|
|
|
|
} else {
|
|
|
|
d->flags &= ~DEVFL_EXT;
|
|
|
|
|
|
|
|
/* number lba28 sectors */
|
2005-09-30 00:47:40 +08:00
|
|
|
ssize = le32_to_cpu(get_unaligned((__le32 *) &id[60<<1]));
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* NOTE: obsolete in ATA 6 */
|
2005-09-30 00:47:40 +08:00
|
|
|
d->geo.cylinders = le16_to_cpu(get_unaligned((__le16 *) &id[54<<1]));
|
|
|
|
d->geo.heads = le16_to_cpu(get_unaligned((__le16 *) &id[55<<1]));
|
|
|
|
d->geo.sectors = le16_to_cpu(get_unaligned((__le16 *) &id[56<<1]));
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2006-01-20 02:46:19 +08:00
|
|
|
|
|
|
|
if (d->ssize != ssize)
|
2006-09-21 02:36:49 +08:00
|
|
|
iprintk("%012llx e%lu.%lu v%04x has %llu sectors\n",
|
|
|
|
(unsigned long long)mac_addr(d->addr),
|
2006-01-20 02:46:19 +08:00
|
|
|
d->aoemajor, d->aoeminor,
|
|
|
|
d->fw_ver, (long long)ssize);
|
2005-04-17 06:20:36 +08:00
|
|
|
d->ssize = ssize;
|
|
|
|
d->geo.start = 0;
|
|
|
|
if (d->gd != NULL) {
|
|
|
|
d->gd->capacity = ssize;
|
2006-01-20 02:46:19 +08:00
|
|
|
d->flags |= DEVFL_NEWSIZE;
|
|
|
|
} else {
|
|
|
|
if (d->flags & DEVFL_GDALLOC) {
|
2006-09-21 02:36:49 +08:00
|
|
|
eprintk("can't schedule work for e%lu.%lu, %s\n",
|
2006-01-20 02:46:19 +08:00
|
|
|
d->aoemajor, d->aoeminor,
|
2006-09-21 02:36:49 +08:00
|
|
|
"it's already on! This shouldn't happen.\n");
|
2006-01-20 02:46:19 +08:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
d->flags |= DEVFL_GDALLOC;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
schedule_work(&d->work);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
calc_rttavg(struct aoedev *d, int rtt)
|
|
|
|
{
|
|
|
|
register long n;
|
|
|
|
|
|
|
|
n = rtt;
|
|
|
|
if (n < MINTIMER)
|
|
|
|
n = MINTIMER;
|
|
|
|
else if (n > MAXTIMER)
|
|
|
|
n = MAXTIMER;
|
|
|
|
|
|
|
|
/* g == .25; cf. Congestion Avoidance and Control, Jacobson & Karels; 1988 */
|
|
|
|
n -= d->rttavg;
|
|
|
|
d->rttavg += n >> 2;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
aoecmd_ata_rsp(struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct aoedev *d;
|
2006-09-21 02:36:49 +08:00
|
|
|
struct aoe_hdr *hin, *hout;
|
2005-04-17 06:20:36 +08:00
|
|
|
struct aoe_atahdr *ahin, *ahout;
|
|
|
|
struct frame *f;
|
|
|
|
struct buf *buf;
|
|
|
|
struct sk_buff *sl;
|
|
|
|
register long n;
|
|
|
|
ulong flags;
|
|
|
|
char ebuf[128];
|
2005-04-19 13:00:18 +08:00
|
|
|
u16 aoemajor;
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
hin = (struct aoe_hdr *) skb->mac.raw;
|
2005-04-19 13:00:20 +08:00
|
|
|
aoemajor = be16_to_cpu(hin->major);
|
2005-04-19 13:00:18 +08:00
|
|
|
d = aoedev_by_aoeaddr(aoemajor, hin->minor);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (d == NULL) {
|
|
|
|
snprintf(ebuf, sizeof ebuf, "aoecmd_ata_rsp: ata response "
|
|
|
|
"for unknown device %d.%d\n",
|
2005-04-19 13:00:18 +08:00
|
|
|
aoemajor, hin->minor);
|
2005-04-17 06:20:36 +08:00
|
|
|
aoechr_error(ebuf);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_lock_irqsave(&d->lock, flags);
|
|
|
|
|
2005-04-19 13:00:20 +08:00
|
|
|
f = getframe(d, be32_to_cpu(hin->tag));
|
2005-04-17 06:20:36 +08:00
|
|
|
if (f == NULL) {
|
|
|
|
spin_unlock_irqrestore(&d->lock, flags);
|
|
|
|
snprintf(ebuf, sizeof ebuf,
|
|
|
|
"%15s e%d.%d tag=%08x@%08lx\n",
|
|
|
|
"unexpected rsp",
|
2005-04-19 13:00:20 +08:00
|
|
|
be16_to_cpu(hin->major),
|
2005-04-17 06:20:36 +08:00
|
|
|
hin->minor,
|
2005-04-19 13:00:20 +08:00
|
|
|
be32_to_cpu(hin->tag),
|
2005-04-17 06:20:36 +08:00
|
|
|
jiffies);
|
|
|
|
aoechr_error(ebuf);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
calc_rttavg(d, tsince(f->tag));
|
|
|
|
|
|
|
|
ahin = (struct aoe_atahdr *) (hin+1);
|
2006-09-21 02:36:49 +08:00
|
|
|
hout = (struct aoe_hdr *) f->skb->mac.raw;
|
|
|
|
ahout = (struct aoe_atahdr *) (hout+1);
|
2005-04-17 06:20:36 +08:00
|
|
|
buf = f->buf;
|
|
|
|
|
2006-02-08 00:37:24 +08:00
|
|
|
if (ahout->cmdstat == WIN_IDENTIFY)
|
|
|
|
d->flags &= ~DEVFL_PAUSE;
|
2005-04-17 06:20:36 +08:00
|
|
|
if (ahin->cmdstat & 0xa9) { /* these bits cleared on success */
|
2006-09-21 02:36:49 +08:00
|
|
|
eprintk("ata error cmd=%2.2Xh stat=%2.2Xh from e%ld.%ld\n",
|
2005-04-17 06:20:36 +08:00
|
|
|
ahout->cmdstat, ahin->cmdstat,
|
|
|
|
d->aoemajor, d->aoeminor);
|
|
|
|
if (buf)
|
|
|
|
buf->flags |= BUFFL_FAIL;
|
|
|
|
} else {
|
2006-09-21 02:36:49 +08:00
|
|
|
n = ahout->scnt << 9;
|
2005-04-17 06:20:36 +08:00
|
|
|
switch (ahout->cmdstat) {
|
|
|
|
case WIN_READ:
|
|
|
|
case WIN_READ_EXT:
|
|
|
|
if (skb->len - sizeof *hin - sizeof *ahin < n) {
|
2006-09-21 02:36:49 +08:00
|
|
|
eprintk("runt data size in read. skb->len=%d\n",
|
2005-04-17 06:20:36 +08:00
|
|
|
skb->len);
|
|
|
|
/* fail frame f? just returning will rexmit. */
|
|
|
|
spin_unlock_irqrestore(&d->lock, flags);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
memcpy(f->bufaddr, ahin+1, n);
|
|
|
|
case WIN_WRITE:
|
|
|
|
case WIN_WRITE_EXT:
|
2006-09-21 02:36:49 +08:00
|
|
|
if (f->bcnt -= n) {
|
|
|
|
f->bufaddr += n;
|
|
|
|
put_lba(ahout, f->lba += ahout->scnt);
|
2006-09-21 02:36:49 +08:00
|
|
|
n = f->bcnt;
|
|
|
|
if (n > DEFAULTBCNT)
|
|
|
|
n = DEFAULTBCNT;
|
2006-09-21 02:36:49 +08:00
|
|
|
ahout->scnt = n >> 9;
|
|
|
|
if (ahout->aflags & AOEAFL_WRITE)
|
2006-09-21 02:36:49 +08:00
|
|
|
skb_fill_page_desc(f->skb, 0,
|
|
|
|
virt_to_page(f->bufaddr),
|
2006-09-21 02:36:49 +08:00
|
|
|
offset_in_page(f->bufaddr), n);
|
2006-09-21 02:36:49 +08:00
|
|
|
f->tag = newtag(d);
|
|
|
|
hout->tag = cpu_to_be32(f->tag);
|
|
|
|
skb->dev = d->ifp;
|
2006-09-21 02:36:49 +08:00
|
|
|
skb_get(f->skb);
|
|
|
|
f->skb->next = NULL;
|
|
|
|
spin_unlock_irqrestore(&d->lock, flags);
|
|
|
|
aoenet_xmit(f->skb);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (n > DEFAULTBCNT)
|
|
|
|
d->lostjumbo = 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
|
|
|
case WIN_IDENTIFY:
|
|
|
|
if (skb->len - sizeof *hin - sizeof *ahin < 512) {
|
2006-09-21 02:36:49 +08:00
|
|
|
iprintk("runt data size in ataid. skb->len=%d\n",
|
|
|
|
skb->len);
|
2005-04-17 06:20:36 +08:00
|
|
|
spin_unlock_irqrestore(&d->lock, flags);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
ataid_complete(d, (char *) (ahin+1));
|
|
|
|
break;
|
|
|
|
default:
|
2006-09-21 02:36:49 +08:00
|
|
|
iprintk("unrecognized ata command %2.2Xh for %d.%d\n",
|
|
|
|
ahout->cmdstat,
|
|
|
|
be16_to_cpu(hin->major),
|
|
|
|
hin->minor);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (buf) {
|
|
|
|
buf->nframesout -= 1;
|
|
|
|
if (buf->nframesout == 0 && buf->resid == 0) {
|
2005-04-19 13:00:22 +08:00
|
|
|
unsigned long duration = jiffies - buf->start_time;
|
|
|
|
unsigned long n_sect = buf->bio->bi_size >> 9;
|
|
|
|
struct gendisk *disk = d->gd;
|
2005-11-01 16:54:23 +08:00
|
|
|
const int rw = bio_data_dir(buf->bio);
|
2005-04-19 13:00:22 +08:00
|
|
|
|
2005-11-01 16:54:23 +08:00
|
|
|
disk_stat_inc(disk, ios[rw]);
|
|
|
|
disk_stat_add(disk, ticks[rw], duration);
|
|
|
|
disk_stat_add(disk, sectors[rw], n_sect);
|
2005-04-19 13:00:22 +08:00
|
|
|
disk_stat_add(disk, io_ticks, duration);
|
2005-04-17 06:20:36 +08:00
|
|
|
n = (buf->flags & BUFFL_FAIL) ? -EIO : 0;
|
|
|
|
bio_endio(buf->bio, buf->bio->bi_size, n);
|
|
|
|
mempool_free(buf, d->bufpool);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
f->buf = NULL;
|
|
|
|
f->tag = FREETAG;
|
|
|
|
|
|
|
|
aoecmd_work(d);
|
2005-04-19 13:00:22 +08:00
|
|
|
sl = d->sendq_hd;
|
|
|
|
d->sendq_hd = d->sendq_tl = NULL;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
spin_unlock_irqrestore(&d->lock, flags);
|
|
|
|
aoenet_xmit(sl);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
aoecmd_cfg(ushort aoemajor, unsigned char aoeminor)
|
|
|
|
{
|
2006-01-20 02:46:19 +08:00
|
|
|
struct sk_buff *sl;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-01-20 02:46:19 +08:00
|
|
|
sl = aoecmd_cfg_pkts(aoemajor, aoeminor, NULL);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
aoenet_xmit(sl);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Since we only call this in one place (and it only prepares one frame)
|
2005-04-19 13:00:22 +08:00
|
|
|
* we just return the skb. Usually we'd chain it up to the aoedev sendq.
|
2005-04-17 06:20:36 +08:00
|
|
|
*/
|
|
|
|
static struct sk_buff *
|
|
|
|
aoecmd_ata_id(struct aoedev *d)
|
|
|
|
{
|
|
|
|
struct aoe_hdr *h;
|
|
|
|
struct aoe_atahdr *ah;
|
|
|
|
struct frame *f;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
|
|
|
|
f = getframe(d, FREETAG);
|
|
|
|
if (f == NULL) {
|
2006-09-21 02:36:49 +08:00
|
|
|
eprintk("can't get a frame. This shouldn't happen.\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* initialize the headers & frame */
|
2006-09-21 02:36:49 +08:00
|
|
|
skb = f->skb;
|
|
|
|
h = (struct aoe_hdr *) skb->mac.raw;
|
2005-04-17 06:20:36 +08:00
|
|
|
ah = (struct aoe_atahdr *) (h+1);
|
2006-09-21 02:36:49 +08:00
|
|
|
skb->len = sizeof *h + sizeof *ah;
|
|
|
|
memset(h, 0, skb->len);
|
2005-04-17 06:20:36 +08:00
|
|
|
f->tag = aoehdr_atainit(d, h);
|
|
|
|
f->waited = 0;
|
|
|
|
|
|
|
|
/* set up ata header */
|
|
|
|
ah->scnt = 1;
|
|
|
|
ah->cmdstat = WIN_IDENTIFY;
|
|
|
|
ah->lba3 = 0xa0;
|
|
|
|
|
2006-09-21 02:36:49 +08:00
|
|
|
skb->dev = d->ifp;
|
|
|
|
skb_get(skb);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-01-20 02:46:19 +08:00
|
|
|
d->rttavg = MAXTIMER;
|
2005-04-17 06:20:36 +08:00
|
|
|
d->timer.function = rexmit_timer;
|
|
|
|
|
|
|
|
return skb;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
aoecmd_cfg_rsp(struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct aoedev *d;
|
|
|
|
struct aoe_hdr *h;
|
|
|
|
struct aoe_cfghdr *ch;
|
2005-04-19 13:00:20 +08:00
|
|
|
ulong flags, sysminor, aoemajor;
|
2005-04-17 06:20:36 +08:00
|
|
|
struct sk_buff *sl;
|
2006-01-20 02:46:20 +08:00
|
|
|
enum { MAXFRAMES = 16 };
|
2006-09-21 02:36:49 +08:00
|
|
|
u16 n;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
h = (struct aoe_hdr *) skb->mac.raw;
|
|
|
|
ch = (struct aoe_cfghdr *) (h+1);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Enough people have their dip switches set backwards to
|
|
|
|
* warrant a loud message for this special case.
|
|
|
|
*/
|
2005-04-19 13:00:20 +08:00
|
|
|
aoemajor = be16_to_cpu(h->major);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (aoemajor == 0xfff) {
|
2006-09-21 02:36:49 +08:00
|
|
|
eprintk("Warning: shelf address is all ones. "
|
|
|
|
"Check shelf dip switches.\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
sysminor = SYSMINOR(aoemajor, h->minor);
|
2005-04-19 13:00:17 +08:00
|
|
|
if (sysminor * AOE_PARTITIONS + AOE_PARTITIONS > MINORMASK) {
|
2006-09-21 02:36:49 +08:00
|
|
|
iprintk("e%ld.%d: minor number too large\n",
|
2005-04-19 13:00:17 +08:00
|
|
|
aoemajor, (int) h->minor);
|
2005-04-17 06:20:36 +08:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2006-09-21 02:36:49 +08:00
|
|
|
n = be16_to_cpu(ch->bufcnt);
|
|
|
|
if (n > MAXFRAMES) /* keep it reasonable */
|
|
|
|
n = MAXFRAMES;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-09-21 02:36:49 +08:00
|
|
|
d = aoedev_by_sysminor_m(sysminor, n);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (d == NULL) {
|
2006-09-21 02:36:49 +08:00
|
|
|
iprintk("device sysminor_m failure\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_lock_irqsave(&d->lock, flags);
|
|
|
|
|
2006-01-20 02:46:19 +08:00
|
|
|
/* permit device to migrate mac and network interface */
|
|
|
|
d->ifp = skb->dev;
|
|
|
|
memcpy(d->addr, h->src, sizeof d->addr);
|
2006-09-21 02:36:49 +08:00
|
|
|
if (!(d->flags & DEVFL_MAXBCNT)) {
|
|
|
|
n = d->ifp->mtu;
|
|
|
|
n -= sizeof (struct aoe_hdr) + sizeof (struct aoe_atahdr);
|
|
|
|
n /= 512;
|
|
|
|
if (n > ch->scnt)
|
|
|
|
n = ch->scnt;
|
|
|
|
d->maxbcnt = n ? n * 512 : DEFAULTBCNT;
|
|
|
|
}
|
2006-01-20 02:46:19 +08:00
|
|
|
|
|
|
|
/* don't change users' perspective */
|
|
|
|
if (d->nopen && !(d->flags & DEVFL_PAUSE)) {
|
2005-04-17 06:20:36 +08:00
|
|
|
spin_unlock_irqrestore(&d->lock, flags);
|
|
|
|
return;
|
|
|
|
}
|
2006-01-20 02:46:19 +08:00
|
|
|
d->flags |= DEVFL_PAUSE; /* force pause */
|
2005-04-19 13:00:20 +08:00
|
|
|
d->fw_ver = be16_to_cpu(ch->fwver);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-01-20 02:46:19 +08:00
|
|
|
/* check for already outstanding ataid */
|
|
|
|
sl = aoedev_isbusy(d) == 0 ? aoecmd_ata_id(d) : NULL;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
spin_unlock_irqrestore(&d->lock, flags);
|
|
|
|
|
|
|
|
aoenet_xmit(sl);
|
|
|
|
}
|
|
|
|
|