* [PATCH V4] b43: Changes to enable BCM4311 rev 02 with wireless core revision 13
@ 2007-11-26 16:00 Larry Finger
2007-11-26 16:18 ` Michael Buesch
0 siblings, 1 reply; 2+ messages in thread
From: Larry Finger @ 2007-11-26 16:00 UTC (permalink / raw)
To: John Linville, Michael Buesch; +Cc: Bcm43xx-dev, linux-wireless
The BCM94311MCG rev 02 chip has an 802.11 core with revision 13 and
has not been supported until now. The changes include the following:
(1) Add the 802.11 rev 13 device to the ssb_device_id table to load b43=
=2E
(2) Add PHY revision 9 to the supported list.
(3) Change the 2-bit routing code for address extensions to 0b10 rather
than the 0b01 used for the 32-bit case.
(4) Remove some magic numbers in the DMA setup.
The DMA implementation for this chip supports full 64-bit addressing wi=
th
one exception. Whenever the Descriptor Ring Buffer is in high memory, a
fatal DMA error occurs. This problem was not present in 2.6.24-rc2 due
to code to "Bias the placement of kernel pages at lower PFNs". When
commit 44048d70 reverted that code, the DMA error appeared. As a "fix",
use the GFP_DMA flag when allocating the buffer for 64-bit DMA. At pres=
ent,
this problem is thought to arise from a hardware error.
This patch has been tested on my system and by C=C3=A9dric Caumont
<icare40@hotmail.com>.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
---
John,
This patch is intended for the everything branch of wireless-2.6.
Larry
---
dma.c | 30 ++++++++++++++++++++++--------
main.c | 3 ++-
wa.c | 1 +
3 files changed, 25 insertions(+), 9 deletions(-)
Index: wireless-2.6/drivers/net/wireless/b43/dma.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- wireless-2.6.orig/drivers/net/wireless/b43/dma.c
+++ wireless-2.6/drivers/net/wireless/b43/dma.c
@@ -165,7 +165,7 @@ static void op64_fill_descriptor(struct=20
addrhi =3D (((u64) dmaaddr >> 32) & ~SSB_DMA_TRANSLATION_MASK);
addrext =3D (((u64) dmaaddr >> 32) & SSB_DMA_TRANSLATION_MASK)
>> SSB_DMA_TRANSLATION_SHIFT;
- addrhi |=3D ssb_dma_translation(ring->dev->dev);
+ addrhi |=3D (ssb_dma_translation(ring->dev->dev) << 1);
if (slot =3D=3D ring->nr_slots - 1)
ctl0 |=3D B43_DMA64_DCTL0_DTABLEEND;
if (start)
@@ -426,9 +426,21 @@ static inline
static int alloc_ringmemory(struct b43_dmaring *ring)
{
struct device *dev =3D ring->dev->dev->dev;
+ gfp_t flags =3D GFP_KERNEL;
=20
+ /* The specs call for 4K buffers for 30- and 32-bit DMA with 4K
+ * alignment and 8K buffers for 64-bit DMA with 8K alignment. Testing
+ * has shown that 4K is sufficient for the latter as long as the buff=
er
+ * does not cross an 8K boundary.
+ *
+ * For unknown reasons - possibly a hardware error - the BCM4311 rev
+ * 02, which uses 64-bit DMA, needs the ring buffer in very low memor=
y,
+ * which accounts for the GFP_DMA flag below.
+ */
+ if (ring->dma64)
+ flags =3D GFP_DMA;
ring->descbase =3D dma_alloc_coherent(dev, B43_DMA_RINGMEMSIZE,
- &(ring->dmabase), GFP_KERNEL);
+ &(ring->dmabase), flags);
if (!ring->descbase) {
b43err(ring->dev->wl, "DMA ringmemory allocation failed\n");
return -ENOMEM;
@@ -483,7 +495,7 @@ int b43_dmacontroller_rx_reset(struct b4
return 0;
}
=20
-/* Reset the RX DMA channel */
+/* Reset the TX DMA channel */
int b43_dmacontroller_tx_reset(struct b43_wldev *dev, u16 mmio_base, i=
nt dma64)
{
int i;
@@ -647,7 +659,7 @@ static int dmacontroller_setup(struct b4
b43_dma_write(ring, B43_DMA64_TXRINGHI,
((ringbase >> 32) &
~SSB_DMA_TRANSLATION_MASK)
- | trans);
+ | (trans << 1));
} else {
u32 ringbase =3D (u32) (ring->dmabase);
=20
@@ -680,8 +692,9 @@ static int dmacontroller_setup(struct b4
b43_dma_write(ring, B43_DMA64_RXRINGHI,
((ringbase >> 32) &
~SSB_DMA_TRANSLATION_MASK)
- | trans);
- b43_dma_write(ring, B43_DMA64_RXINDEX, 200);
+ | (trans << 1));
+ b43_dma_write(ring, B43_DMA64_RXINDEX, ring->nr_slots *
+ sizeof(struct b43_dmadesc64));
} else {
u32 ringbase =3D (u32) (ring->dmabase);
=20
@@ -695,11 +708,12 @@ static int dmacontroller_setup(struct b4
b43_dma_write(ring, B43_DMA32_RXRING,
(ringbase & ~SSB_DMA_TRANSLATION_MASK)
| trans);
- b43_dma_write(ring, B43_DMA32_RXINDEX, 200);
+ b43_dma_write(ring, B43_DMA32_RXINDEX, ring->nr_slots *
+ sizeof(struct b43_dmadesc32));
}
}
=20
- out:
+out:
return err;
}
=20
Index: wireless-2.6/drivers/net/wireless/b43/main.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- wireless-2.6.orig/drivers/net/wireless/b43/main.c
+++ wireless-2.6/drivers/net/wireless/b43/main.c
@@ -93,6 +93,7 @@ static const struct ssb_device_id b43_ss
SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 7),
SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 9),
SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 10),
+ SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 13),
SSB_DEVTABLE_END
};
=20
@@ -3064,7 +3065,7 @@ static int b43_phy_versioning(struct b43
unsupported =3D 1;
break;
case B43_PHYTYPE_G:
- if (phy_rev > 8)
+ if (phy_rev > 9)
unsupported =3D 1;
break;
default:
Index: wireless-2.6/drivers/net/wireless/b43/wa.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- wireless-2.6.orig/drivers/net/wireless/b43/wa.c
+++ wireless-2.6/drivers/net/wireless/b43/wa.c
@@ -642,6 +642,7 @@ void b43_wa_all(struct b43_wldev *dev)
case 6:
case 7:
case 8:
+ case 9:
b43_wa_tr_ltov(dev);
b43_wa_crs_ed(dev);
b43_wa_rssi_lt(dev);
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH V4] b43: Changes to enable BCM4311 rev 02 with wireless core revision 13
2007-11-26 16:00 [PATCH V4] b43: Changes to enable BCM4311 rev 02 with wireless core revision 13 Larry Finger
@ 2007-11-26 16:18 ` Michael Buesch
0 siblings, 0 replies; 2+ messages in thread
From: Michael Buesch @ 2007-11-26 16:18 UTC (permalink / raw)
To: Larry Finger; +Cc: John Linville, Bcm43xx-dev, linux-wireless
On Monday 26 November 2007 17:00:06 Larry Finger wrote:
> static int alloc_ringmemory(struct b43_dmaring *ring)
> {
> struct device *dev = ring->dev->dev->dev;
> + gfp_t flags = GFP_KERNEL;
>
> + /* The specs call for 4K buffers for 30- and 32-bit DMA with 4K
> + * alignment and 8K buffers for 64-bit DMA with 8K alignment. Testing
> + * has shown that 4K is sufficient for the latter as long as the buffer
> + * does not cross an 8K boundary.
> + *
> + * For unknown reasons - possibly a hardware error - the BCM4311 rev
> + * 02, which uses 64-bit DMA, needs the ring buffer in very low memory,
> + * which accounts for the GFP_DMA flag below.
> + */
> + if (ring->dma64)
> + flags = GFP_DMA;
???
--
Greetings Michael.
^ permalink raw reply [flat|nested] 2+ messages in thread
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