[PATCH] b43legacy: remove 64-bit DMA support
Larry Finger
Larry.Finger at lwfinger.net
Tue Jul 26 13:47:56 EDT 2011
On 07/25/2011 04:40 PM, Pavel Roskin wrote:
> Devices supported by b43legacy don't support 64-bit DMA.
>
> Signed-off-by: Pavel Roskin<proski at gnu.org>
> ---
> The patch was tested on Broadcom 4306.
>
> drivers/net/wireless/b43legacy/dma.c | 374 ++++++----------------------------
> drivers/net/wireless/b43legacy/dma.h | 107 ----------
> 2 files changed, 71 insertions(+), 410 deletions(-)
Tested on BCM4303.
ACKed-by: Larry Finger <Larry.Finger at lwfinger.net>
See some minor comments below.
Larry
> diff --git a/drivers/net/wireless/b43legacy/dma.c b/drivers/net/wireless/b43legacy/dma.c
> index 704ee62..a23b998 100644
> --- a/drivers/net/wireless/b43legacy/dma.c
> +++ b/drivers/net/wireless/b43legacy/dma.c
> @@ -42,10 +42,9 @@
>
> /* 32bit DMA ops. */
> static
> -struct b43legacy_dmadesc_generic *op32_idx2desc(
> - struct b43legacy_dmaring *ring,
> - int slot,
> - struct b43legacy_dmadesc_meta **meta)
> +struct b43legacy_dmadesc32 *op32_idx2desc(struct b43legacy_dmaring *ring,
> + int slot,
> + struct b43legacy_dmadesc_meta **meta)
> {
> struct b43legacy_dmadesc32 *desc;
>
> @@ -53,11 +52,11 @@ struct b43legacy_dmadesc_generic *op32_idx2desc(
> desc = ring->descbase;
> desc =&(desc[slot]);
>
> - return (struct b43legacy_dmadesc_generic *)desc;
> + return (struct b43legacy_dmadesc32 *)desc;
> }
>
> static void op32_fill_descriptor(struct b43legacy_dmaring *ring,
> - struct b43legacy_dmadesc_generic *desc,
> + struct b43legacy_dmadesc32 *desc,
> dma_addr_t dmaaddr, u16 bufsize,
> int start, int end, int irq)
> {
> @@ -67,7 +66,7 @@ static void op32_fill_descriptor(struct b43legacy_dmaring *ring,
> u32 addr;
> u32 addrext;
>
> - slot = (int)(&(desc->dma32) - descbase);
> + slot = (int)(desc - descbase);
> B43legacy_WARN_ON(!(slot>= 0&& slot< ring->nr_slots));
>
> addr = (u32)(dmaaddr& ~SSB_DMA_TRANSLATION_MASK);
> @@ -87,8 +86,8 @@ static void op32_fill_descriptor(struct b43legacy_dmaring *ring,
> ctl |= (addrext<< B43legacy_DMA32_DCTL_ADDREXT_SHIFT)
> & B43legacy_DMA32_DCTL_ADDREXT_MASK;
>
> - desc->dma32.control = cpu_to_le32(ctl);
> - desc->dma32.address = cpu_to_le32(addr);
> + desc->control = cpu_to_le32(ctl);
> + desc->address = cpu_to_le32(addr);
> }
>
> static void op32_poke_tx(struct b43legacy_dmaring *ring, int slot)
> @@ -128,121 +127,6 @@ static void op32_set_current_rxslot(struct b43legacy_dmaring *ring,
> (u32)(slot * sizeof(struct b43legacy_dmadesc32)));
> }
>
> -static const struct b43legacy_dma_ops dma32_ops = {
> - .idx2desc = op32_idx2desc,
> - .fill_descriptor = op32_fill_descriptor,
> - .poke_tx = op32_poke_tx,
> - .tx_suspend = op32_tx_suspend,
> - .tx_resume = op32_tx_resume,
> - .get_current_rxslot = op32_get_current_rxslot,
> - .set_current_rxslot = op32_set_current_rxslot,
> -};
> -
> -/* 64bit DMA ops. */
> -static
> -struct b43legacy_dmadesc_generic *op64_idx2desc(
> - struct b43legacy_dmaring *ring,
> - int slot,
> - struct b43legacy_dmadesc_meta
> - **meta)
> -{
> - struct b43legacy_dmadesc64 *desc;
> -
> - *meta =&(ring->meta[slot]);
> - desc = ring->descbase;
> - desc =&(desc[slot]);
> -
> - return (struct b43legacy_dmadesc_generic *)desc;
> -}
> -
> -static void op64_fill_descriptor(struct b43legacy_dmaring *ring,
> - struct b43legacy_dmadesc_generic *desc,
> - dma_addr_t dmaaddr, u16 bufsize,
> - int start, int end, int irq)
> -{
> - struct b43legacy_dmadesc64 *descbase = ring->descbase;
> - int slot;
> - u32 ctl0 = 0;
> - u32 ctl1 = 0;
> - u32 addrlo;
> - u32 addrhi;
> - u32 addrext;
> -
> - slot = (int)(&(desc->dma64) - descbase);
> - B43legacy_WARN_ON(!(slot>= 0&& slot< ring->nr_slots));
> -
> - addrlo = (u32)(dmaaddr& 0xFFFFFFFF);
> - addrhi = (((u64)dmaaddr>> 32)& ~SSB_DMA_TRANSLATION_MASK);
> - addrext = (((u64)dmaaddr>> 32)& SSB_DMA_TRANSLATION_MASK)
> - >> SSB_DMA_TRANSLATION_SHIFT;
> - addrhi |= ring->dev->dma.translation;
> - if (slot == ring->nr_slots - 1)
> - ctl0 |= B43legacy_DMA64_DCTL0_DTABLEEND;
> - if (start)
> - ctl0 |= B43legacy_DMA64_DCTL0_FRAMESTART;
> - if (end)
> - ctl0 |= B43legacy_DMA64_DCTL0_FRAMEEND;
> - if (irq)
> - ctl0 |= B43legacy_DMA64_DCTL0_IRQ;
> - ctl1 |= (bufsize - ring->frameoffset)
> - & B43legacy_DMA64_DCTL1_BYTECNT;
> - ctl1 |= (addrext<< B43legacy_DMA64_DCTL1_ADDREXT_SHIFT)
> - & B43legacy_DMA64_DCTL1_ADDREXT_MASK;
> -
> - desc->dma64.control0 = cpu_to_le32(ctl0);
> - desc->dma64.control1 = cpu_to_le32(ctl1);
> - desc->dma64.address_low = cpu_to_le32(addrlo);
> - desc->dma64.address_high = cpu_to_le32(addrhi);
> -}
> -
> -static void op64_poke_tx(struct b43legacy_dmaring *ring, int slot)
> -{
> - b43legacy_dma_write(ring, B43legacy_DMA64_TXINDEX,
> - (u32)(slot * sizeof(struct b43legacy_dmadesc64)));
> -}
> -
> -static void op64_tx_suspend(struct b43legacy_dmaring *ring)
> -{
> - b43legacy_dma_write(ring, B43legacy_DMA64_TXCTL,
> - b43legacy_dma_read(ring, B43legacy_DMA64_TXCTL)
> - | B43legacy_DMA64_TXSUSPEND);
> -}
> -
> -static void op64_tx_resume(struct b43legacy_dmaring *ring)
> -{
> - b43legacy_dma_write(ring, B43legacy_DMA64_TXCTL,
> - b43legacy_dma_read(ring, B43legacy_DMA64_TXCTL)
> - & ~B43legacy_DMA64_TXSUSPEND);
> -}
> -
> -static int op64_get_current_rxslot(struct b43legacy_dmaring *ring)
> -{
> - u32 val;
> -
> - val = b43legacy_dma_read(ring, B43legacy_DMA64_RXSTATUS);
> - val&= B43legacy_DMA64_RXSTATDPTR;
> -
> - return (val / sizeof(struct b43legacy_dmadesc64));
> -}
> -
> -static void op64_set_current_rxslot(struct b43legacy_dmaring *ring,
> - int slot)
> -{
> - b43legacy_dma_write(ring, B43legacy_DMA64_RXINDEX,
> - (u32)(slot * sizeof(struct b43legacy_dmadesc64)));
> -}
> -
> -static const struct b43legacy_dma_ops dma64_ops = {
> - .idx2desc = op64_idx2desc,
> - .fill_descriptor = op64_fill_descriptor,
> - .poke_tx = op64_poke_tx,
> - .tx_suspend = op64_tx_suspend,
> - .tx_resume = op64_tx_resume,
> - .get_current_rxslot = op64_get_current_rxslot,
> - .set_current_rxslot = op64_set_current_rxslot,
> -};
> -
> -
> static inline int free_slots(struct b43legacy_dmaring *ring)
> {
> return (ring->nr_slots - ring->used_slots);
> @@ -358,14 +242,6 @@ return 0;
> static u16 b43legacy_dmacontroller_base(enum b43legacy_dmatype type,
> int controller_idx)
> {
> - static const u16 map64[] = {
> - B43legacy_MMIO_DMA64_BASE0,
> - B43legacy_MMIO_DMA64_BASE1,
> - B43legacy_MMIO_DMA64_BASE2,
> - B43legacy_MMIO_DMA64_BASE3,
> - B43legacy_MMIO_DMA64_BASE4,
> - B43legacy_MMIO_DMA64_BASE5,
> - };
> static const u16 map32[] = {
> B43legacy_MMIO_DMA32_BASE0,
> B43legacy_MMIO_DMA32_BASE1,
> @@ -375,11 +251,6 @@ static u16 b43legacy_dmacontroller_base(enum b43legacy_dmatype type,
> B43legacy_MMIO_DMA32_BASE5,
> };
>
> - if (type == B43legacy_DMA_64BIT) {
> - B43legacy_WARN_ON(!(controller_idx>= 0&&
> - controller_idx< ARRAY_SIZE(map64)));
> - return map64[controller_idx];
> - }
> B43legacy_WARN_ON(!(controller_idx>= 0&&
> controller_idx< ARRAY_SIZE(map32)));
> return map32[controller_idx];
> @@ -491,25 +362,15 @@ static int b43legacy_dmacontroller_rx_reset(struct b43legacy_wldev *dev,
>
> might_sleep();
>
> - offset = (type == B43legacy_DMA_64BIT) ?
> - B43legacy_DMA64_RXCTL : B43legacy_DMA32_RXCTL;
> + offset = B43legacy_DMA32_RXCTL;
> b43legacy_write32(dev, mmio_base + offset, 0);
> for (i = 0; i< 10; i++) {
> - offset = (type == B43legacy_DMA_64BIT) ?
> - B43legacy_DMA64_RXSTATUS : B43legacy_DMA32_RXSTATUS;
> + offset = B43legacy_DMA32_RXSTATUS;
> value = b43legacy_read32(dev, mmio_base + offset);
> - if (type == B43legacy_DMA_64BIT) {
> - value&= B43legacy_DMA64_RXSTAT;
> - if (value == B43legacy_DMA64_RXSTAT_DISABLED) {
> - i = -1;
> - break;
> - }
> - } else {
> - value&= B43legacy_DMA32_RXSTATE;
> - if (value == B43legacy_DMA32_RXSTAT_DISABLED) {
> - i = -1;
> - break;
> - }
> + value&= B43legacy_DMA32_RXSTATE;
I am surprised that checkpatch doesn't see the spacing around the &= as an error.
> + if (value == B43legacy_DMA32_RXSTAT_DISABLED) {
> + i = -1;
> + break;
> }
> msleep(1);
> }
> @@ -533,43 +394,24 @@ static int b43legacy_dmacontroller_tx_reset(struct b43legacy_wldev *dev,
> might_sleep();
>
> for (i = 0; i< 10; i++) {
> - offset = (type == B43legacy_DMA_64BIT) ?
> - B43legacy_DMA64_TXSTATUS : B43legacy_DMA32_TXSTATUS;
> + offset = B43legacy_DMA32_TXSTATUS;
> value = b43legacy_read32(dev, mmio_base + offset);
> - if (type == B43legacy_DMA_64BIT) {
> - value&= B43legacy_DMA64_TXSTAT;
> - if (value == B43legacy_DMA64_TXSTAT_DISABLED ||
> - value == B43legacy_DMA64_TXSTAT_IDLEWAIT ||
> - value == B43legacy_DMA64_TXSTAT_STOPPED)
> - break;
> - } else {
> - value&= B43legacy_DMA32_TXSTATE;
> - if (value == B43legacy_DMA32_TXSTAT_DISABLED ||
> - value == B43legacy_DMA32_TXSTAT_IDLEWAIT ||
> - value == B43legacy_DMA32_TXSTAT_STOPPED)
> - break;
> - }
> + value&= B43legacy_DMA32_TXSTATE;
Ditto.
> + if (value == B43legacy_DMA32_TXSTAT_DISABLED ||
> + value == B43legacy_DMA32_TXSTAT_IDLEWAIT ||
> + value == B43legacy_DMA32_TXSTAT_STOPPED)
> + break;
> msleep(1);
> }
> - offset = (type == B43legacy_DMA_64BIT) ? B43legacy_DMA64_TXCTL :
> - B43legacy_DMA32_TXCTL;
> + offset = B43legacy_DMA32_TXCTL;
> b43legacy_write32(dev, mmio_base + offset, 0);
> for (i = 0; i< 10; i++) {
> - offset = (type == B43legacy_DMA_64BIT) ?
> - B43legacy_DMA64_TXSTATUS : B43legacy_DMA32_TXSTATUS;
> + offset = B43legacy_DMA32_TXSTATUS;
> value = b43legacy_read32(dev, mmio_base + offset);
> - if (type == B43legacy_DMA_64BIT) {
> - value&= B43legacy_DMA64_TXSTAT;
> - if (value == B43legacy_DMA64_TXSTAT_DISABLED) {
> - i = -1;
> - break;
> - }
> - } else {
> - value&= B43legacy_DMA32_TXSTATE;
> - if (value == B43legacy_DMA32_TXSTAT_DISABLED) {
> - i = -1;
> - break;
> - }
> + value&= B43legacy_DMA32_TXSTATE;
Ditto.
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