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SubjectRe: PATCH 2.5.4 i810_audio, bttv, working at all.
Pete Zaitcev wrote:
>>From: Linus Torvalds <torvalds@transmeta.com>
>>Date: 2002-02-13 16:47:33
>>Subject: Re: PATCH 2.5.4 i810_audio, bttv, working at all.
>>
>
>>On Wed, 13 Feb 2002, Jeff Garzik wrote:
>>
>>>These changes are wrong. The addresses desired need to be obtained from
>>>the pci_alloc_consistent return values.
>>>
>>Let's face it, people won't care about the complex PCI interfaces unless
>>they give you something useful.
>>
>
> I cannot believe that I am reading that. The pinhead penguin
> is totally off the thread. The fix for i810 took me less than
> 10 minutes, and it works perfectly! What the hell are you
> talking about here? What complex interfaces?! Is this a list
> for kernel programmers or milksuckers? The interface is
> simple as a pancake!
>
> -- Pete
>
> P.S. Doug, for heaven's sake, push the fix upstrem ASAP, please.
> I cannot stand this stupidity and incompetence anymore.
>
> P.P.S. Posting this FOR THE THIRD TIME in reply for a broken
> patch. Next guy to post a broken "fix" for i810 with
> isa_virt_to_bus or virt_to_phis may suffer very badly.

I agree that the patch is the correct fix. All except for the line changing
the remap_page_range() call it's also totally relevant to the 2.4 kernel driver.


--

Doug Ledford <dledford@redhat.com> http://people.redhat.com/dledford
Please check my web site for aic7xxx updates/answers before
e-mailing me about problems
--- linux-2.5.3/drivers/sound/i810_audio.c Mon Jan 28 14:35:13 2002
+++ linux-2.5.3-p3/drivers/sound/i810_audio.c Fri Feb 8 16:24:05 2002
@@ -335,7 +335,6 @@


struct i810_card {
- struct i810_channel channel[3];
unsigned int magic;

/* We keep i810 cards in a linked list */
@@ -359,6 +358,8 @@
/* structures for abstraction of hardware facilities, codecs, banks and channels*/
struct ac97_codec *ac97_codec[NR_AC97];
struct i810_state *states[NR_HW_CH];
+ struct i810_channel *channel; /* 1:1 to states[] but diff. lifetime */
+ dma_addr_t chandma;

u16 ac97_features;
u16 ac97_status;
@@ -939,7 +940,7 @@

for(i=0;i<dmabuf->numfrag;i++)
{
- sg->busaddr=virt_to_bus(dmabuf->rawbuf+dmabuf->fragsize*i);
+ sg->busaddr=(u32)dmabuf->dma_handle+dmabuf->fragsize*i;
// the card will always be doing 16bit stereo
sg->control=dmabuf->fragsamples;
if(state->card->pci_id == PCI_DEVICE_ID_SI_7012)
@@ -954,7 +955,9 @@
}
spin_lock_irqsave(&state->card->lock, flags);
outb(2, state->card->iobase+c->port+OFF_CR); /* reset DMA machine */
- outl(virt_to_bus(&c->sg[0]), state->card->iobase+c->port+OFF_BDBAR);
+ outl((u32)state->card->chandma +
+ c->num*sizeof(struct i810_channel),
+ state->card->iobase+c->port+OFF_BDBAR);
outb(0, state->card->iobase+c->port+OFF_CIV);
outb(0, state->card->iobase+c->port+OFF_LVI);

@@ -1669,7 +1672,7 @@
if (size > (PAGE_SIZE << dmabuf->buforder))
goto out;
ret = -EAGAIN;
- if (remap_page_range(vma->vm_start, virt_to_phys(dmabuf->rawbuf),
+ if (remap_page_range(vma, vma->vm_start, virt_to_phys(dmabuf->rawbuf),
size, vma->vm_page_prot))
goto out;
dmabuf->mapped = 1;
@@ -1722,7 +1725,9 @@
}
if (c != NULL) {
outb(2, state->card->iobase+c->port+OFF_CR); /* reset DMA machine */
- outl(virt_to_bus(&c->sg[0]), state->card->iobase+c->port+OFF_BDBAR);
+ outl((u32)state->card->chandma +
+ c->num*sizeof(struct i810_channel),
+ state->card->iobase+c->port+OFF_BDBAR);
outb(0, state->card->iobase+c->port+OFF_CIV);
outb(0, state->card->iobase+c->port+OFF_LVI);
}
@@ -2881,15 +2886,26 @@
card->alloc_rec_pcm_channel = i810_alloc_rec_pcm_channel;
card->alloc_rec_mic_channel = i810_alloc_rec_mic_channel;
card->free_pcm_channel = i810_free_pcm_channel;
- card->channel[0].offset = 0;
- card->channel[0].port = 0x00;
- card->channel[0].num=0;
- card->channel[1].offset = 0;
- card->channel[1].port = 0x10;
- card->channel[1].num=1;
- card->channel[2].offset = 0;
- card->channel[2].port = 0x20;
- card->channel[2].num=2;
+
+ if ((card->channel = pci_alloc_consistent(pci_dev,
+ sizeof(struct i810_channel)*NR_HW_CH, &card->chandma)) == NULL) {
+ printk(KERN_ERR "i810: cannot allocate channel DMA memory\n");
+ goto out_mem;
+ }
+
+ { /* We may dispose of this altogether some time soon, so... */
+ struct i810_channel *cp = card->channel;
+
+ cp[0].offset = 0;
+ cp[0].port = 0x00;
+ cp[0].num = 0;
+ cp[1].offset = 0;
+ cp[1].port = 0x10;
+ cp[1].num = 1;
+ cp[2].offset = 0;
+ cp[2].port = 0x20;
+ cp[2].num = 2;
+ }

/* claim our iospace and irq */
request_region(card->iobase, 64, card_names[pci_id->driver_data]);
@@ -2900,8 +2916,7 @@
printk(KERN_ERR "i810_audio: unable to allocate irq %d\n", card->irq);
release_region(card->iobase, 64);
release_region(card->ac97base, 256);
- kfree(card);
- return -ENODEV;
+ goto out_chan;
}

/* initialize AC97 codec and register /dev/mixer */
@@ -2909,8 +2924,7 @@
release_region(card->iobase, 64);
release_region(card->ac97base, 256);
free_irq(card->irq, card);
- kfree(card);
- return -ENODEV;
+ goto out_chan;
}
pci_set_drvdata(pci_dev, card);

@@ -2931,11 +2945,17 @@
unregister_sound_mixer(card->ac97_codec[i]->dev_mixer);
kfree (card->ac97_codec[i]);
}
- kfree(card);
- return -ENODEV;
+ goto out_chan;
}
card->initializing = 0;
return 0;
+
+ out_chan:
+ pci_free_consistent(pci_dev, sizeof(struct i810_channel)*NR_HW_CH,
+ card->channel, card->chandma);
+ out_mem:
+ kfree(card);
+ return -ENODEV;
}

static void __exit i810_remove(struct pci_dev *pci_dev)
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