diff options
Diffstat (limited to 'package/bcm43xx-mac80211/src/bcm43xx/bcm43xx_dma.c')
| -rw-r--r-- | package/bcm43xx-mac80211/src/bcm43xx/bcm43xx_dma.c | 1520 |
1 files changed, 0 insertions, 1520 deletions
diff --git a/package/bcm43xx-mac80211/src/bcm43xx/bcm43xx_dma.c b/package/bcm43xx-mac80211/src/bcm43xx/bcm43xx_dma.c deleted file mode 100644 index 814e1ad075..0000000000 --- a/package/bcm43xx-mac80211/src/bcm43xx/bcm43xx_dma.c +++ /dev/null @@ -1,1520 +0,0 @@ -/* - - Broadcom BCM43xx wireless driver - - DMA ringbuffer and descriptor allocation/management - - Copyright (c) 2005, 2006 Michael Buesch <mb@bu3sch.de> - - Some code in this file is derived from the b44.c driver - Copyright (C) 2002 David S. Miller - Copyright (C) Pekka Pietikainen - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; see the file COPYING. If not, write to - the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor, - Boston, MA 02110-1301, USA. - -*/ - -#include "bcm43xx.h" -#include "bcm43xx_dma.h" -#include "bcm43xx_main.h" -#include "bcm43xx_debugfs.h" -#include "bcm43xx_power.h" -#include "bcm43xx_xmit.h" - -#include <linux/dma-mapping.h> -#include <linux/pci.h> -#include <linux/delay.h> -#include <linux/skbuff.h> - - -/* 32bit DMA ops. */ -static -struct bcm43xx_dmadesc_generic * op32_idx2desc(struct bcm43xx_dmaring *ring, - int slot, - struct bcm43xx_dmadesc_meta **meta) -{ - struct bcm43xx_dmadesc32 *desc; - - *meta = &(ring->meta[slot]); - desc = ring->descbase; - desc = &(desc[slot]); - - return (struct bcm43xx_dmadesc_generic *)desc; -} - -static void op32_fill_descriptor(struct bcm43xx_dmaring *ring, - struct bcm43xx_dmadesc_generic *desc, - dma_addr_t dmaaddr, u16 bufsize, - int start, int end, int irq) -{ - struct bcm43xx_dmadesc32 *descbase = ring->descbase; - int slot; - u32 ctl; - u32 addr; - u32 addrext; - - slot = (int)(&(desc->dma32) - descbase); - assert(slot >= 0 && slot < ring->nr_slots); - - addr = (u32)(dmaaddr & ~SSB_DMA_TRANSLATION_MASK); - addrext = (u32)(dmaaddr & SSB_DMA_TRANSLATION_MASK) - >> SSB_DMA_TRANSLATION_SHIFT; - addr |= ssb_dma_translation(ring->dev->dev); - ctl = (bufsize - ring->frameoffset) - & BCM43xx_DMA32_DCTL_BYTECNT; - if (slot == ring->nr_slots - 1) - ctl |= BCM43xx_DMA32_DCTL_DTABLEEND; - if (start) - ctl |= BCM43xx_DMA32_DCTL_FRAMESTART; - if (end) - ctl |= BCM43xx_DMA32_DCTL_FRAMEEND; - if (irq) - ctl |= BCM43xx_DMA32_DCTL_IRQ; - ctl |= (addrext << BCM43xx_DMA32_DCTL_ADDREXT_SHIFT) - & BCM43xx_DMA32_DCTL_ADDREXT_MASK; - - desc->dma32.control = cpu_to_le32(ctl); - desc->dma32.address = cpu_to_le32(addr); -} - -static void op32_poke_tx(struct bcm43xx_dmaring *ring, int slot) -{ - bcm43xx_dma_write(ring, BCM43xx_DMA32_TXINDEX, - (u32)(slot * sizeof(struct bcm43xx_dmadesc32))); -} - -static void op32_tx_suspend(struct bcm43xx_dmaring *ring) -{ - bcm43xx_dma_write(ring, BCM43xx_DMA32_TXCTL, - bcm43xx_dma_read(ring, BCM43xx_DMA32_TXCTL) - | BCM43xx_DMA32_TXSUSPEND); -} - -static void op32_tx_resume(struct bcm43xx_dmaring *ring) -{ - bcm43xx_dma_write(ring, BCM43xx_DMA32_TXCTL, - bcm43xx_dma_read(ring, BCM43xx_DMA32_TXCTL) - & ~BCM43xx_DMA32_TXSUSPEND); -} - -static int op32_get_current_rxslot(struct bcm43xx_dmaring *ring) -{ - u32 val; - - val = bcm43xx_dma_read(ring, BCM43xx_DMA32_RXSTATUS); - val &= BCM43xx_DMA32_RXDPTR; - - return (val / sizeof(struct bcm43xx_dmadesc32)); -} - -static void op32_set_current_rxslot(struct bcm43xx_dmaring *ring, - int slot) -{ - bcm43xx_dma_write(ring, BCM43xx_DMA32_RXINDEX, - (u32)(slot * sizeof(struct bcm43xx_dmadesc32))); -} - -static const struct bcm43xx_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 bcm43xx_dmadesc_generic * op64_idx2desc(struct bcm43xx_dmaring *ring, - int slot, - struct bcm43xx_dmadesc_meta **meta) -{ - struct bcm43xx_dmadesc64 *desc; - - *meta = &(ring->meta[slot]); - desc = ring->descbase; - desc = &(desc[slot]); - - return (struct bcm43xx_dmadesc_generic *)desc; -} - -static void op64_fill_descriptor(struct bcm43xx_dmaring *ring, - struct bcm43xx_dmadesc_generic *desc, - dma_addr_t dmaaddr, u16 bufsize, - int start, int end, int irq) -{ - struct bcm43xx_dmadesc64 *descbase = ring->descbase; - int slot; - u32 ctl0 = 0, ctl1 = 0; - u32 addrlo, addrhi; - u32 addrext; - - slot = (int)(&(desc->dma64) - descbase); - assert(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 |= ssb_dma_translation(ring->dev->dev); - if (slot == ring->nr_slots - 1) - ctl0 |= BCM43xx_DMA64_DCTL0_DTABLEEND; - if (start) - ctl0 |= BCM43xx_DMA64_DCTL0_FRAMESTART; - if (end) - ctl0 |= BCM43xx_DMA64_DCTL0_FRAMEEND; - if (irq) - ctl0 |= BCM43xx_DMA64_DCTL0_IRQ; - ctl1 |= (bufsize - ring->frameoffset) - & BCM43xx_DMA64_DCTL1_BYTECNT; - ctl1 |= (addrext << BCM43xx_DMA64_DCTL1_ADDREXT_SHIFT) - & BCM43xx_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 bcm43xx_dmaring *ring, int slot) -{ - bcm43xx_dma_write(ring, BCM43xx_DMA64_TXINDEX, - (u32)(slot * sizeof(struct bcm43xx_dmadesc64))); -} - -static void op64_tx_suspend(struct bcm43xx_dmaring *ring) -{ - bcm43xx_dma_write(ring, BCM43xx_DMA64_TXCTL, - bcm43xx_dma_read(ring, BCM43xx_DMA64_TXCTL) - | BCM43xx_DMA64_TXSUSPEND); -} - -static void op64_tx_resume(struct bcm43xx_dmaring *ring) -{ - bcm43xx_dma_write(ring, BCM43xx_DMA64_TXCTL, - bcm43xx_dma_read(ring, BCM43xx_DMA64_TXCTL) - & ~BCM43xx_DMA64_TXSUSPEND); -} - -static int op64_get_current_rxslot(struct bcm43xx_dmaring *ring) -{ - u32 val; - - val = bcm43xx_dma_read(ring, BCM43xx_DMA64_RXSTATUS); - val &= BCM43xx_DMA64_RXSTATDPTR; - - return (val / sizeof(struct bcm43xx_dmadesc64)); -} - -static void op64_set_current_rxslot(struct bcm43xx_dmaring *ring, - int slot) -{ - bcm43xx_dma_write(ring, BCM43xx_DMA64_RXINDEX, - (u32)(slot * sizeof(struct bcm43xx_dmadesc64))); -} - -static const struct bcm43xx_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 bcm43xx_dmaring *ring) -{ - return (ring->nr_slots - ring->used_slots); -} - -static inline int next_slot(struct bcm43xx_dmaring *ring, int slot) -{ - assert(slot >= -1 && slot <= ring->nr_slots - 1); - if (slot == ring->nr_slots - 1) - return 0; - return slot + 1; -} - -static inline int prev_slot(struct bcm43xx_dmaring *ring, int slot) -{ - assert(slot >= 0 && slot <= ring->nr_slots - 1); - if (slot == 0) - return ring->nr_slots - 1; - return slot - 1; -} - -#ifdef CONFIG_BCM43XX_MAC80211_DEBUG -static void update_max_used_slots(struct bcm43xx_dmaring *ring, - int current_used_slots) -{ - if (current_used_slots <= ring->max_used_slots) - return; - ring->max_used_slots = current_used_slots; - if (bcm43xx_debug(ring->dev, BCM43xx_DBG_DMAVERBOSE)) { - dprintk(KERN_DEBUG PFX - "max_used_slots increased to %d on %s ring %d\n", - ring->max_used_slots, - ring->tx ? "TX" : "RX", - ring->index); - } -} -#else -static inline -void update_max_used_slots(struct bcm43xx_dmaring *ring, - int current_used_slots) -{ } -#endif /* DEBUG */ - -/* Request a slot for usage. */ -static inline -int request_slot(struct bcm43xx_dmaring *ring) -{ - int slot; - - assert(ring->tx); - assert(!ring->stopped); - assert(free_slots(ring) != 0); - - slot = next_slot(ring, ring->current_slot); - ring->current_slot = slot; - ring->used_slots++; - - update_max_used_slots(ring, ring->used_slots); - - return slot; -} - -/* Mac80211-queue to bcm43xx-ring mapping */ -static struct bcm43xx_dmaring * priority_to_txring(struct bcm43xx_wldev *dev, - int queue_priority) -{ - struct bcm43xx_dmaring *ring; - -/*FIXME: For now we always run on TX-ring-1 */ -return dev->dma.tx_ring1; - - /* 0 = highest priority */ - switch (queue_priority) { - default: - assert(0); - /* fallthrough */ - case 0: - ring = dev->dma.tx_ring3; - break; - case 1: - ring = dev->dma.tx_ring2; - break; - case 2: - ring = dev->dma.tx_ring1; - break; - case 3: - ring = dev->dma.tx_ring0; - break; - case 4: - ring = dev->dma.tx_ring4; - break; - case 5: - ring = dev->dma.tx_ring5; - break; - } - - return ring; -} - -/* Bcm43xx-ring to mac80211-queue mapping */ -static inline int txring_to_priority(struct bcm43xx_dmaring *ring) -{ - static const u8 idx_to_prio[] = - { 3, 2, 1, 0, 4, 5, }; - -/*FIXME: have only one queue, for now */ -return 0; - - return idx_to_prio[ring->index]; -} - - -u16 bcm43xx_dmacontroller_base(int dma64bit, int controller_idx) -{ - static const u16 map64[] = { - BCM43xx_MMIO_DMA64_BASE0, - BCM43xx_MMIO_DMA64_BASE1, - BCM43xx_MMIO_DMA64_BASE2, - BCM43xx_MMIO_DMA64_BASE3, - BCM43xx_MMIO_DMA64_BASE4, - BCM43xx_MMIO_DMA64_BASE5, - }; - static const u16 map32[] = { - BCM43xx_MMIO_DMA32_BASE0, - BCM43xx_MMIO_DMA32_BASE1, - BCM43xx_MMIO_DMA32_BASE2, - BCM43xx_MMIO_DMA32_BASE3, - BCM43xx_MMIO_DMA32_BASE4, - BCM43xx_MMIO_DMA32_BASE5, - }; - - if (dma64bit) { - assert(controller_idx >= 0 && - controller_idx < ARRAY_SIZE(map64)); - return map64[controller_idx]; - } - assert(controller_idx >= 0 && - controller_idx < ARRAY_SIZE(map32)); - return map32[controller_idx]; -} - -static inline -dma_addr_t map_descbuffer(struct bcm43xx_dmaring *ring, - unsigned char *buf, - size_t len, - int tx) -{ - dma_addr_t dmaaddr; - - if (tx) { - dmaaddr = dma_map_single(ring->dev->dev->dev, - buf, len, - DMA_TO_DEVICE); - } else { - dmaaddr = dma_map_single(ring->dev->dev->dev, - buf, len, - DMA_FROM_DEVICE); - } - - return dmaaddr; -} - -static inline -void unmap_descbuffer(struct bcm43xx_dmaring *ring, - dma_addr_t addr, - size_t len, - int tx) -{ - if (tx) { - dma_unmap_single(ring->dev->dev->dev, - addr, len, - DMA_TO_DEVICE); - } else { - dma_unmap_single(ring->dev->dev->dev, - addr, len, - DMA_FROM_DEVICE); - } -} - -static inline -void sync_descbuffer_for_cpu(struct bcm43xx_dmaring *ring, - dma_addr_t addr, - size_t len) -{ - assert(!ring->tx); - - dma_sync_single_for_cpu(ring->dev->dev->dev, - addr, len, DMA_FROM_DEVICE); -} - -static inline -void sync_descbuffer_for_device(struct bcm43xx_dmaring *ring, - dma_addr_t addr, - size_t len) -{ - assert(!ring->tx); - - dma_sync_single_for_device(ring->dev->dev->dev, - addr, len, DMA_FROM_DEVICE); -} - -static inline -void free_descriptor_buffer(struct bcm43xx_dmaring *ring, - struct bcm43xx_dmadesc_meta *meta, - int irq_context) -{ - if (meta->skb) { - if (irq_context) - dev_kfree_skb_irq(meta->skb); - else - dev_kfree_skb(meta->skb); - meta->skb = NULL; - } -} - -static int alloc_ringmemory(struct bcm43xx_dmaring *ring) -{ - struct device *dev = ring->dev->dev->dev; - - ring->descbase = dma_alloc_coherent(dev, BCM43xx_DMA_RINGMEMSIZE, - &(ring->dmabase), GFP_KERNEL); - if (!ring->descbase) { - printk(KERN_ERR PFX "DMA ringmemory allocation failed\n"); - return -ENOMEM; - } - memset(ring->descbase, 0, BCM43xx_DMA_RINGMEMSIZE); - - return 0; -} - -static void free_ringmemory(struct bcm43xx_dmaring *ring) -{ - struct device *dev = ring->dev->dev->dev; - - dma_free_coherent(dev, BCM43xx_DMA_RINGMEMSIZE, - ring->descbase, ring->dmabase); -} - -/* Reset the RX DMA channel */ -int bcm43xx_dmacontroller_rx_reset(struct bcm43xx_wldev *dev, - u16 mmio_base, int dma64) -{ - int i; - u32 value; - u16 offset; - - might_sleep(); - - offset = dma64 ? BCM43xx_DMA64_RXCTL : BCM43xx_DMA32_RXCTL; - bcm43xx_write32(dev, mmio_base + offset, 0); - for (i = 0; i < 10; i++) { - offset = dma64 ? BCM43xx_DMA64_RXSTATUS : BCM43xx_DMA32_RXSTATUS; - value = bcm43xx_read32(dev, mmio_base + offset); - if (dma64) { - value &= BCM43xx_DMA64_RXSTAT; - if (value == BCM43xx_DMA64_RXSTAT_DISABLED) { - i = -1; - break; - } - } else { - value &= BCM43xx_DMA32_RXSTATE; - if (value == BCM43xx_DMA32_RXSTAT_DISABLED) { - i = -1; - break; - } - } - msleep(1); - } - if (i != -1) { - printk(KERN_ERR PFX "ERROR: DMA RX reset timed out\n"); - return -ENODEV; - } - - return 0; -} - -/* Reset the RX DMA channel */ -int bcm43xx_dmacontroller_tx_reset(struct bcm43xx_wldev *dev, - u16 mmio_base, int dma64) -{ - int i; - u32 value; - u16 offset; - - might_sleep(); - - for (i = 0; i < 10; i++) { - offset = dma64 ? BCM43xx_DMA64_TXSTATUS : BCM43xx_DMA32_TXSTATUS; - value = bcm43xx_read32(dev, mmio_base + offset); - if (dma64) { - value &= BCM43xx_DMA64_TXSTAT; - if (value == BCM43xx_DMA64_TXSTAT_DISABLED || - value == BCM43xx_DMA64_TXSTAT_IDLEWAIT || - value == BCM43xx_DMA64_TXSTAT_STOPPED) - break; - } else { - value &= BCM43xx_DMA32_TXSTATE; - if (value == BCM43xx_DMA32_TXSTAT_DISABLED || - value == BCM43xx_DMA32_TXSTAT_IDLEWAIT || - value == BCM43xx_DMA32_TXSTAT_STOPPED) - break; - } - msleep(1); - } - offset = dma64 ? BCM43xx_DMA64_TXCTL : BCM43xx_DMA32_TXCTL; - bcm43xx_write32(dev, mmio_base + offset, 0); - for (i = 0; i < 10; i++) { - offset = dma64 ? BCM43xx_DMA64_TXSTATUS : BCM43xx_DMA32_TXSTATUS; - value = bcm43xx_read32(dev, mmio_base + offset); - if (dma64) { - value &= BCM43xx_DMA64_TXSTAT; - if (value == BCM43xx_DMA64_TXSTAT_DISABLED) { - i = -1; - break; - } - } else { - value &= BCM43xx_DMA32_TXSTATE; - if (value == BCM43xx_DMA32_TXSTAT_DISABLED) { - i = -1; - break; - } - } - msleep(1); - } - if (i != -1) { - printk(KERN_ERR PFX "ERROR: DMA TX reset timed out\n"); - return -ENODEV; - } - /* ensure the reset is completed. */ - msleep(1); - - return 0; -} - -static int setup_rx_descbuffer(struct bcm43xx_dmaring *ring, - struct bcm43xx_dmadesc_generic *desc, - struct bcm43xx_dmadesc_meta *meta, - gfp_t gfp_flags) -{ - struct bcm43xx_rxhdr_fw4 *rxhdr; - struct bcm43xx_hwtxstatus *txstat; - dma_addr_t dmaaddr; - struct sk_buff *skb; - - assert(!ring->tx); - - skb = __dev_alloc_skb(ring->rx_buffersize, gfp_flags); - if (unlikely(!skb)) - return -ENOMEM; - dmaaddr = map_descbuffer(ring, skb->data, - ring->rx_buffersize, 0); - if (dma_mapping_error(dmaaddr)) { - /* ugh. try to realloc in zone_dma */ - gfp_flags |= GFP_DMA; - - dev_kfree_skb_any(skb); - - skb = __dev_alloc_skb(ring->rx_buffersize, gfp_flags); - if (unlikely(!skb)) - return -ENOMEM; - dmaaddr = map_descbuffer(ring, skb->data, - ring->rx_buffersize, 0); - } - - if (dma_mapping_error(dmaaddr)) { - dev_kfree_skb_any(skb); - return -EIO; - } - - meta->skb = skb; - meta->dmaaddr = dmaaddr; - ring->ops->fill_descriptor(ring, desc, dmaaddr, - ring->rx_buffersize, 0, 0, 0); - - rxhdr = (struct bcm43xx_rxhdr_fw4 *)(skb->data); - rxhdr->frame_len = 0; - txstat = (struct bcm43xx_hwtxstatus *)(skb->data); - txstat->cookie = 0; - - return 0; -} - -/* Allocate the initial descbuffers. - * This is used for an RX ring only. - */ -static int alloc_initial_descbuffers(struct bcm43xx_dmaring *ring) -{ - int i, err = -ENOMEM; - struct bcm43xx_dmadesc_generic *desc; - struct bcm43xx_dmadesc_meta *meta; - - for (i = 0; i < ring->nr_slots; i++) { - desc = ring->ops->idx2desc(ring, i, &meta); - - err = setup_rx_descbuffer(ring, desc, meta, GFP_KERNEL); - if (err) { - printk(KERN_ERR PFX "Failed to allocate initial descbuffers\n"); - goto err_unwind; - } - } - mb(); - ring->used_slots = ring->nr_slots; - err = 0; -out: - return err; - -err_unwind: - for (i--; i >= 0; i--) { - desc = ring->ops->idx2desc(ring, i, &meta); - - unmap_descbuffer(ring, meta->dmaaddr, ring->rx_buffersize, 0); - dev_kfree_skb(meta->skb); - } - goto out; -} - -/* Do initial setup of the DMA controller. - * Reset the controller, write the ring busaddress - * and switch the "enable" bit on. - */ -static int dmacontroller_setup(struct bcm43xx_dmaring *ring) -{ - int err = 0; - u32 value; - u32 addrext; - u32 trans = ssb_dma_translation(ring->dev->dev); - - if (ring->tx) { - if (ring->dma64) { - u64 ringbase = (u64)(ring->dmabase); - - addrext = ((ringbase >> 32) & SSB_DMA_TRANSLATION_MASK) - >> SSB_DMA_TRANSLATION_SHIFT; - value = BCM43xx_DMA64_TXENABLE; - value |= (addrext << BCM43xx_DMA64_TXADDREXT_SHIFT) - & BCM43xx_DMA64_TXADDREXT_MASK; - bcm43xx_dma_write(ring, BCM43xx_DMA64_TXCTL, value); - bcm43xx_dma_write(ring, BCM43xx_DMA64_TXRINGLO, - (ringbase & 0xFFFFFFFF)); - bcm43xx_dma_write(ring, BCM43xx_DMA64_TXRINGHI, - ((ringbase >> 32) & ~SSB_DMA_TRANSLATION_MASK) - | trans); - } else { - u32 ringbase = (u32)(ring->dmabase); - - addrext = (ringbase & SSB_DMA_TRANSLATION_MASK) - >> SSB_DMA_TRANSLATION_SHIFT; - value = BCM43xx_DMA32_TXENABLE; - value |= (addrext << BCM43xx_DMA32_TXADDREXT_SHIFT) - & BCM43xx_DMA32_TXADDREXT_MASK; - bcm43xx_dma_write(ring, BCM43xx_DMA32_TXCTL, value); - bcm43xx_dma_write(ring, BCM43xx_DMA32_TXRING, - (ringbase & ~SSB_DMA_TRANSLATION_MASK) - | trans); - } - } else { - err = alloc_initial_descbuffers(ring); - if (err) - goto out; - if (ring->dma64) { - u64 ringbase = (u64)(ring->dmabase); - - addrext = ((ringbase >> 32) & SSB_DMA_TRANSLATION_MASK) - >> SSB_DMA_TRANSLATION_SHIFT; - value = (ring->frameoffset << BCM43xx_DMA64_RXFROFF_SHIFT); - value |= BCM43xx_DMA64_RXENABLE; - value |= (addrext << BCM43xx_DMA64_RXADDREXT_SHIFT) - & BCM43xx_DMA64_RXADDREXT_MASK; - bcm43xx_dma_write(ring, BCM43xx_DMA64_RXCTL, value); - bcm43xx_dma_write(ring, BCM43xx_DMA64_RXRINGLO, - (ringbase & 0xFFFFFFFF)); - bcm43xx_dma_write(ring, BCM43xx_DMA64_RXRINGHI, - ((ringbase >> 32) & ~SSB_DMA_TRANSLATION_MASK) - | trans); - bcm43xx_dma_write(ring, BCM43xx_DMA64_RXINDEX, 200); - } else { - u32 ringbase = (u32)(ring->dmabase); - - addrext = (ringbase & SSB_DMA_TRANSLATION_MASK) - >> SSB_DMA_TRANSLATION_SHIFT; - value = (ring->frameoffset << BCM43xx_DMA32_RXFROFF_SHIFT); - value |= BCM43xx_DMA32_RXENABLE; - value |= (addrext << BCM43xx_DMA32_RXADDREXT_SHIFT) - & BCM43xx_DMA32_RXADDREXT_MASK; - bcm43xx_dma_write(ring, BCM43xx_DMA32_RXCTL, value); - bcm43xx_dma_write(ring, BCM43xx_DMA32_RXRING, - (ringbase & ~SSB_DMA_TRANSLATION_MASK) - | trans); - bcm43xx_dma_write(ring, BCM43xx_DMA32_RXINDEX, 200); - } - } - -out: - return err; -} - -/* Shutdown the DMA controller. */ -static void dmacontroller_cleanup(struct bcm43xx_dmaring *ring) -{ - if (ring->tx) { - bcm43xx_dmacontroller_tx_reset(ring->dev, ring->mmio_base, ring->dma64); - if (ring->dma64) { - bcm43xx_dma_write(ring, BCM43xx_DMA64_TXRINGLO, 0); - bcm43xx_dma_write(ring, BCM43xx_DMA64_TXRINGHI, 0); - } else - bcm43xx_dma_write(ring, BCM43xx_DMA32_TXRING, 0); - } else { - bcm43xx_dmacontroller_rx_reset(ring->dev, ring->mmio_base, ring->dma64); - if (ring->dma64) { - bcm43xx_dma_write(ring, BCM43xx_DMA64_RXRINGLO, 0); - bcm43xx_dma_write(ring, BCM43xx_DMA64_RXRINGHI, 0); - } else - bcm43xx_dma_write(ring, BCM43xx_DMA32_RXRING, 0); - } -} - -static void free_all_descbuffers(struct bcm43xx_dmaring *ring) -{ - struct bcm43xx_dmadesc_generic *desc; - struct bcm43xx_dmadesc_meta *meta; - int i; - - if (!ring->used_slots) - return; - for (i = 0; i < ring->nr_slots; i++) { - desc = ring->ops->idx2desc(ring, i, &meta); - - if (!meta->skb) { - assert(ring->tx); - continue; - } - if (ring->tx) { - unmap_descbuffer(ring, meta->dmaaddr, - meta->skb->len, 1); - } else { - unmap_descbuffer(ring, meta->dmaaddr, - ring->rx_buffersize, 0); - } - free_descriptor_buffer(ring, meta, 0); - } -} - -static u64 supported_dma_mask(struct bcm43xx_wldev *dev) -{ - u32 tmp; - u16 mmio_base; - - tmp = bcm43xx_read32(dev, SSB_TMSHIGH); - if (tmp & SSB_TMSHIGH_DMA64) - return DMA_64BIT_MASK; - mmio_base = bcm43xx_dmacontroller_base(0, 0); - bcm43xx_write32(dev, - mmio_base + BCM43xx_DMA32_TXCTL, - BCM43xx_DMA32_TXADDREXT_MASK); - tmp = bcm43xx_read32(dev, - mmio_base + BCM43xx_DMA32_TXCTL); - if (tmp & BCM43xx_DMA32_TXADDREXT_MASK) - return DMA_32BIT_MASK; - - return DMA_30BIT_MASK; -} - -/* Main initialization function. */ -static -struct bcm43xx_dmaring * bcm43xx_setup_dmaring(struct bcm43xx_wldev *dev, - int controller_index, - int for_tx, - int dma64) -{ - struct bcm43xx_dmaring *ring; - int err; - int nr_slots; - dma_addr_t dma_test; - - ring = kzalloc(sizeof(*ring), GFP_KERNEL); - if (!ring) - goto out; - - nr_slots = BCM43xx_RXRING_SLOTS; - if (for_tx) - nr_slots = BCM43xx_TXRING_SLOTS; - - ring->meta = kcalloc(nr_slots, sizeof(struct bcm43xx_dmadesc_meta), - GFP_KERNEL); - if (!ring->meta) - goto err_kfree_ring; - if (for_tx) { - ring->txhdr_cache = kcalloc(nr_slots, - sizeof(struct bcm43xx_txhdr_fw4), - GFP_KERNEL); - if (!ring->txhdr_cache) - goto err_kfree_meta; - - /* test for ability to dma to txhdr_cache */ - dma_test = dma_map_single(dev->dev->dev, - ring->txhdr_cache, sizeof(struct bcm43xx_txhdr_fw4), - DMA_TO_DEVICE); - - if (dma_mapping_error(dma_test)) { - /* ugh realloc */ - kfree(ring->txhdr_cache); - ring->txhdr_cache = kcalloc(nr_slots, - sizeof(struct bcm43xx_txhdr_fw4), - GFP_KERNEL | GFP_DMA); - if (!ring->txhdr_cache) - goto err_kfree_meta; - - dma_test = dma_map_single(dev->dev->dev, - ring->txhdr_cache, sizeof(struct bcm43xx_txhdr_fw4), - DMA_TO_DEVICE); - - if (dma_mapping_error(dma_test)) - goto err_kfree_txhdr_cache; - } - - dma_unmap_single(dev->dev->dev, - dma_test, sizeof(struct bcm43xx_txhdr_fw4), - DMA_TO_DEVICE); - } - - ring->dev = dev; - ring->nr_slots = nr_slots; - ring->mmio_base = bcm43xx_dmacontroller_base(dma64, controller_index); - ring->index = controller_index; - ring->dma64 = !!dma64; - if (dma64) - ring->ops = &dma64_ops; - else - ring->ops = &dma32_ops; - if (for_tx) { - ring->tx = 1; - ring->current_slot = -1; - } else { - if (ring->index == 0) { - ring->rx_buffersize = BCM43xx_DMA0_RX_BUFFERSIZE; - ring->frameoffset = BCM43xx_DMA0_RX_FRAMEOFFSET; - } else if (ring->index == 3) { - ring->rx_buffersize = BCM43xx_DMA3_RX_BUFFERSIZE; - ring->frameoffset = BCM43xx_DMA3_RX_FRAMEOFFSET; - } else - assert(0); - } - spin_lock_init(&ring->lock); -#ifdef CONFIG_BCM43XX_MAC80211_DEBUG - ring->last_injected_overflow = jiffies; -#endif - - err = alloc_ringmemory(ring); - if (err) - goto err_kfree_txhdr_cache; - err = dmacontroller_setup(ring); - if (err) - goto err_free_ringmemory; - -out: - return ring; - -err_free_ringmemory: - free_ringmemory(ring); -err_kfree_txhdr_cache: - kfree(ring->txhdr_cache); -err_kfree_meta: - kfree(ring->meta); -err_kfree_ring: - kfree(ring); - ring = NULL; - goto out; -} - -/* Main cleanup function. */ -static void bcm43xx_destroy_dmaring(struct bcm43xx_dmaring *ring) -{ - if (!ring) - return; - - dprintk(KERN_INFO PFX "DMA-%s 0x%04X (%s) max used slots: %d/%d\n", - (ring->dma64) ? "64" : "32", - ring->mmio_base, - (ring->tx) ? "TX" : "RX", - ring->max_used_slots, ring->nr_slots); - /* Device IRQs are disabled prior entering this function, - * so no need to take care of concurrency with rx handler stuff. - */ - dmacontroller_cleanup(ring); - free_all_descbuffers(ring); - free_ringmemory(ring); - - kfree(ring->txhdr_cache); - kfree(ring->meta); - kfree(ring); -} - -void bcm43xx_dma_free(struct bcm43xx_wldev *dev) -{ - struct bcm43xx_dma *dma; - - if (bcm43xx_using_pio(dev)) - return; - dma = &dev->dma; - - bcm43xx_destroy_dmaring(dma->rx_ring3); - dma->rx_ring3 = NULL; - bcm43xx_destroy_dmaring(dma->rx_ring0); - dma->rx_ring0 = NULL; - - bcm43xx_destroy_dmaring(dma->tx_ring5); - dma->tx_ring5 = NULL; - bcm43xx_destroy_dmaring(dma->tx_ring4); - dma->tx_ring4 = NULL; - bcm43xx_destroy_dmaring(dma->tx_ring3); - dma->tx_ring3 = NULL; - bcm43xx_destroy_dmaring(dma->tx_ring2); - dma->tx_ring2 = NULL; - bcm43xx_destroy_dmaring(dma->tx_ring1); - dma->tx_ring1 = NULL; - bcm43xx_destroy_dmaring(dma->tx_ring0); - dma->tx_ring0 = NULL; -} - -int bcm43xx_dma_init(struct bcm43xx_wldev *dev) -{ - struct bcm43xx_dma *dma = &dev->dma; - struct bcm43xx_dmaring *ring; - int err; - u64 dmamask; - int dma64 = 0; - - dmamask = supported_dma_mask(dev); - if (dmamask == DMA_64BIT_MASK) - dma64 = 1; - - err = ssb_dma_set_mask(dev->dev, dmamask); - if (err) { -#ifdef BCM43XX_MAC80211_PIO - printk(KERN_WARNING PFX "DMA for this device not supported. " - "Falling back to PIO\n"); - dev->__using_pio = 1; - return -EAGAIN; -#else - printk(KERN_ERR PFX "DMA for this device not supported and " - "no PIO support compiled in\n"); - return -EOPNOTSUPP; -#endif - } - - err = -ENOMEM; - /* setup TX DMA channels. */ - ring = bcm43xx_setup_dmaring(dev, 0, 1, dma64); - if (!ring) - goto out; - dma->tx_ring0 = ring; - - ring = bcm43xx_setup_dmaring(dev, 1, 1, dma64); - if (!ring) - goto err_destroy_tx0; - dma->tx_ring1 = ring; - - ring = bcm43xx_setup_dmaring(dev, 2, 1, dma64); - if (!ring) - goto err_destroy_tx1; - dma->tx_ring2 = ring; - - ring = bcm43xx_setup_dmaring(dev, 3, 1, dma64); - if (!ring) - goto err_destroy_tx2; - dma->tx_ring3 = ring; - - ring = bcm43xx_setup_dmaring(dev, 4, 1, dma64); - if (!ring) - goto err_destroy_tx3; - dma->tx_ring4 = ring; - - ring = bcm43xx_setup_dmaring(dev, 5, 1, dma64); - if (!ring) - goto err_destroy_tx4; - dma->tx_ring5 = ring; - - /* setup RX DMA channels. */ - ring = bcm43xx_setup_dmaring(dev, 0, 0, dma64); - if (!ring) - goto err_destroy_tx5; - dma->rx_ring0 = ring; - - if (dev->dev->id.revision < 5) { - ring = bcm43xx_setup_dmaring(dev, 3, 0, dma64); - if (!ring) - goto err_destroy_rx0; - dma->rx_ring3 = ring; - } - - dprintk(KERN_INFO PFX "%d-bit DMA initialized\n", - (dmamask == DMA_64BIT_MASK) ? 64 : - (dmamask == DMA_32BIT_MASK) ? 32 : 30); - err = 0; -out: - return err; - -err_destroy_rx0: - bcm43xx_destroy_dmaring(dma->rx_ring0); - dma->rx_ring0 = NULL; -err_destroy_tx5: - bcm43xx_destroy_dmaring(dma->tx_ring5); - dma->tx_ring5 = NULL; -err_destroy_tx4: - bcm43xx_destroy_dmaring(dma->tx_ring4); - dma->tx_ring4 = NULL; -err_destroy_tx3: - bcm43xx_destroy_dmaring(dma->tx_ring3); - dma->tx_ring3 = NULL; -err_destroy_tx2: - bcm43xx_destroy_dmaring(dma->tx_ring2); - dma->tx_ring2 = NULL; -err_destroy_tx1: - bcm43xx_destroy_dmaring(dma->tx_ring1); - dma->tx_ring1 = NULL; -err_destroy_tx0: - bcm43xx_destroy_dmaring(dma->tx_ring0); - dma->tx_ring0 = NULL; - goto out; -} - -/* Generate a cookie for the TX header. */ -static u16 generate_cookie(struct bcm43xx_dmaring *ring, - int slot) -{ - u16 cookie = 0x1000; - - /* Use the upper 4 bits of the cookie as - * DMA controller ID and store the slot number - * in the lower 12 bits. - * Note that the cookie must never be 0, as this - * is a special value used in RX path. - */ - switch (ring->index) { - case 0: - cookie = 0xA000; - break; - case 1: - cookie = 0xB000; - break; - case 2: - cookie = 0xC000; - break; - case 3: - cookie = 0xD000; - break; - case 4: - cookie = 0xE000; - break; - case 5: - cookie = 0xF000; - break; - } - assert(((u16)slot & 0xF000) == 0x0000); - cookie |= (u16)slot; - - return cookie; -} - -/* Inspect a cookie and find out to which controller/slot it belongs. */ -static -struct bcm43xx_dmaring * parse_cookie(struct bcm43xx_wldev *dev, - u16 cookie, int *slot) -{ - struct bcm43xx_dma *dma = &dev->dma; - struct bcm43xx_dmaring *ring = NULL; - - switch (cookie & 0xF000) { - case 0xA000: - ring = dma->tx_ring0; - break; - case 0xB000: - ring = dma->tx_ring1; - break; - case 0xC000: - ring = dma->tx_ring2; - break; - case 0xD000: - ring = dma->tx_ring3; - break; - case 0xE000: - ring = dma->tx_ring4; - break; - case 0xF000: - ring = dma->tx_ring5; - break; - default: - assert(0); - } - *slot = (cookie & 0x0FFF); - assert(ring && *slot >= 0 && *slot < ring->nr_slots); - - return ring; -} - -static int dma_tx_fragment(struct bcm43xx_dmaring *ring, - struct sk_buff *skb, - struct ieee80211_tx_control *ctl) -{ - const struct bcm43xx_dma_ops *ops = ring->ops; - u8 *header; - int slot; - int err; - struct bcm43xx_dmadesc_generic *desc; - struct bcm43xx_dmadesc_meta *meta; - struct bcm43xx_dmadesc_meta *meta_hdr; - struct sk_buff *bounce_skb; - -#define SLOTS_PER_PACKET 2 - assert(skb_shinfo(skb)->nr_frags == 0); - - /* Get a slot for the header. */ - slot = request_slot(ring); - desc = ops->idx2desc(ring, slot, &meta_hdr); - memset(meta_hdr, 0, sizeof(*meta_hdr)); - - header = &(ring->txhdr_cache[slot * sizeof(struct bcm43xx_txhdr_fw4)]); - bcm43xx_generate_txhdr(ring->dev, header, - skb->data, skb->len, ctl, - generate_cookie(ring, slot)); - - meta_hdr->dmaaddr = map_descbuffer(ring, (unsigned char *)header, - sizeof(struct bcm43xx_txhdr_fw4), 1); - if (dma_mapping_error(meta_hdr->dmaaddr)) - return -EIO; - ops->fill_descriptor(ring, desc, meta_hdr->dmaaddr, - sizeof(struct bcm43xx_txhdr_fw4), 1, 0, 0); - - /* Get a slot for the payload. */ - slot = request_slot(ring); - desc = ops->idx2desc(ring, slot, &meta); - memset(meta, 0, sizeof(*meta)); - - memcpy(&meta->txstat.control, ctl, sizeof(*ctl)); - meta->skb = skb; - meta->is_last_fragment = 1; - - meta->dmaaddr = map_descbuffer(ring, skb->data, skb->len, 1); - /* create a bounce buffer in zone_dma on mapping failure. */ - if (dma_mapping_error(meta->dmaaddr)) { - bounce_skb = __dev_alloc_skb(skb->len, GFP_ATOMIC | GFP_DMA); - if (!bounce_skb) { - err = -ENOMEM; - goto out_unmap_hdr; - } - - memcpy(skb_put(bounce_skb, skb->len), skb->data, skb->len); - dev_kfree_skb_any(skb); - skb = bounce_skb; - meta->skb = skb; - meta->dmaaddr = map_descbuffer(ring, skb->data, skb->len, 1); - if (dma_mapping_error(meta->dmaaddr)) { - err = -EIO; - goto out_free_bounce; - } - } - - ops->fill_descriptor(ring, desc, meta->dmaaddr, - skb->len, 0, 1, 1); - - /* Now transfer the whole frame. */ - wmb(); - ops->poke_tx(ring, next_slot(ring, slot)); - return 0; - -out_free_bounce: - dev_kfree_skb_any(skb); -out_unmap_hdr: - unmap_descbuffer(ring, meta_hdr->dmaaddr, - sizeof(struct bcm43xx_txhdr_fw4), 1); - return err; -} - -static inline -int should_inject_overflow(struct bcm43xx_dmaring *ring) -{ -#ifdef CONFIG_BCM43XX_MAC80211_DEBUG - if (unlikely(bcm43xx_debug(ring->dev, BCM43xx_DBG_DMAOVERFLOW))) { - /* Check if we should inject another ringbuffer overflow - * to test handling of this situation in the stack. */ - unsigned long next_overflow; - - next_overflow = ring->last_injected_overflow + HZ; - if (time_after(jiffies, next_overflow)) { - ring->last_injected_overflow = jiffies; - dprintk(KERN_DEBUG PFX "Injecting TX ring overflow on " - "DMA controller %d\n", ring->index); - return 1; - } - } -#endif /* CONFIG_BCM43XX_MAC80211_DEBUG */ - return 0; -} - -int bcm43xx_dma_tx(struct bcm43xx_wldev *dev, - struct sk_buff *skb, - struct ieee80211_tx_control *ctl) -{ - struct bcm43xx_dmaring *ring; - int err = 0; - unsigned long flags; - - ring = priority_to_txring(dev, ctl->queue); - spin_lock_irqsave(&ring->lock, flags); - assert(ring->tx); - if (unlikely(free_slots(ring) < SLOTS_PER_PACKET)) { - printkl(KERN_ERR PFX "DMA queue overflow\n"); - err = -ENOSPC; - goto out_unlock; - } - /* Check if the queue was stopped in mac80211, - * but we got called nevertheless. - * That would be a mac80211 bug. */ - assert(!ring->stopped); - - err = dma_tx_fragment(ring, skb, ctl); - if (unlikely(err)) { - printkl(KERN_ERR PFX "DMA tx mapping failure\n"); - goto out_unlock; - } - ring->nr_tx_packets++; - if ((free_slots(ring) < SLOTS_PER_PACKET) || - should_inject_overflow(ring)) { - /* This TX ring is full. */ - ieee80211_stop_queue(dev->wl->hw, txring_to_priority(ring)); - ring->stopped = 1; - if (bcm43xx_debug(dev, BCM43xx_DBG_DMAVERBOSE)) { - dprintk(KERN_DEBUG PFX "Stopped TX ring %d\n", - ring->index); - } - } -out_unlock: - spin_unlock_irqrestore(&ring->lock, flags); - - return err; -} - -void bcm43xx_dma_handle_txstatus(struct bcm43xx_wldev *dev, - const struct bcm43xx_txstatus *status) -{ - const struct bcm43xx_dma_ops *ops; - struct bcm43xx_dmaring *ring; - struct bcm43xx_dmadesc_generic *desc; - struct bcm43xx_dmadesc_meta *meta; - int slot; - - ring = parse_cookie(dev, status->cookie, &slot); - if (unlikely(!ring)) - return; - assert(irqs_disabled()); - spin_lock(&ring->lock); - - assert(ring->tx); - ops = ring->ops; - while (1) { - assert(slot >= 0 && slot < ring->nr_slots); - desc = ops->idx2desc(ring, slot, &meta); - - if (meta->skb) - unmap_descbuffer(ring, meta->dmaaddr, meta->skb->len, 1); - else - unmap_descbuffer(ring, meta->dmaaddr, sizeof(struct bcm43xx_txhdr_fw4), 1); - - if (meta->is_last_fragment) { - assert(meta->skb); - /* Call back to inform the ieee80211 subsystem about the - * status of the transmission. - * Some fields of txstat are already filled in dma_tx(). - */ - if (status->acked) - meta->txstat.flags |= IEEE80211_TX_STATUS_ACK; - meta->txstat.retry_count = status->frame_count - 1; - ieee80211_tx_status_irqsafe(dev->wl->hw, meta->skb, &(meta->txstat)); - /* skb is freed by ieee80211_tx_status_irqsafe() */ - meta->skb = NULL; - } else { - /* No need to call free_descriptor_buffer here, as - * this is only the txhdr, which is not allocated. - */ - assert(meta->skb == NULL); - } - - /* Everything unmapped and free'd. So it's not used anymore. */ - ring->used_slots--; - - if (meta->is_last_fragment) - break; - slot = next_slot(ring, slot); - } - dev->stats.last_tx = jiffies; - if (ring->stopped) { - assert(free_slots(ring) >= SLOTS_PER_PACKET); - ieee80211_wake_queue(dev->wl->hw, txring_to_priority(ring)); - ring->stopped = 0; - if (bcm43xx_debug(dev, BCM43xx_DBG_DMAVERBOSE)) { - dprintk(KERN_DEBUG PFX "Woke up TX ring %d\n", - ring->index); - } - } - - spin_unlock(&ring->lock); -} - -void bcm43xx_dma_get_tx_stats(struct bcm43xx_wldev *dev, - struct ieee80211_tx_queue_stats *stats) -{ - const int nr_queues = dev->wl->hw->queues; - struct bcm43xx_dmaring *ring; - struct ieee80211_tx_queue_stats_data *data; - unsigned long flags; - int i; - - for (i = 0; i < nr_queues; i++) { - data = &(stats->data[i]); - ring = priority_to_txring(dev, i); - - spin_lock_irqsave(&ring->lock, flags); - data->len = ring->used_slots / SLOTS_PER_PACKET; - data->limit = ring->nr_slots / SLOTS_PER_PACKET; - data->count = ring->nr_tx_packets; - spin_unlock_irqrestore(&ring->lock, flags); - } -} - -static void dma_rx(struct bcm43xx_dmaring *ring, - int *slot) -{ - const struct bcm43xx_dma_ops *ops = ring->ops; - struct bcm43xx_dmadesc_generic *desc; - struct bcm43xx_dmadesc_meta *meta; - struct bcm43xx_rxhdr_fw4 *rxhdr; - struct sk_buff *skb; - u16 len; - int err; - dma_addr_t dmaaddr; - - desc = ops->idx2desc(ring, *slot, &meta); - - sync_descbuffer_for_cpu(ring, meta->dmaaddr, ring->rx_buffersize); - skb = meta->skb; - - if (ring->index == 3) { - /* We received an xmit status. */ - struct bcm43xx_hwtxstatus *hw = (struct bcm43xx_hwtxstatus *)skb->data; - int i = 0; - - while (hw->cookie == 0) { - if (i > 100) - break; - i++; - udelay(2); - barrier(); - } - bcm43xx_handle_hwtxstatus(ring->dev, hw); - /* recycle the descriptor buffer. */ - sync_descbuffer_for_device(ring, meta->dmaaddr, ring->rx_buffersize); - - return; - } - rxhdr = (struct bcm43xx_rxhdr_fw4 *)skb->data; - len = le16_to_cpu(rxhdr->frame_len); - if (len == 0) { - int i = 0; - - do { - udelay(2); - barrier(); - len = le16_to_cpu(rxhdr->frame_len); - } while (len == 0 && i++ < 5); - if (unlikely(len == 0)) { - /* recycle the descriptor buffer. */ - sync_descbuffer_for_device(ring, meta->dmaaddr, - ring->rx_buffersize); - goto drop; - } - } - if (unlikely(len > ring->rx_buffersize)) { - /* The data did not fit into one descriptor buffer - * and is split over multiple buffers. - * This should never happen, as we try to allocate buffers - * big enough. So simply ignore this packet. - */ - int cnt = 0; - s32 tmp = len; - - while (1) { - desc = ops->idx2desc(ring, *slot, &meta); - /* recycle the descriptor buffer. */ - sync_descbuffer_for_device(ring, meta->dmaaddr, - ring->rx_buffersize); - *slot = next_slot(ring, *slot); - cnt++; - tmp -= ring->rx_buffersize; - if (tmp <= 0) - break; - } - printkl(KERN_ERR PFX "DMA RX buffer too small " - "(len: %u, buffer: %u, nr-dropped: %d)\n", - len, ring->rx_buffersize, cnt); - goto drop; - } - - dmaaddr = meta->dmaaddr; - err = setup_rx_descbuffer(ring, desc, meta, GFP_ATOMIC); - if (unlikely(err)) { - dprintkl(KERN_ERR PFX "DMA RX: setup_rx_descbuffer() failed\n"); - sync_descbuffer_for_device(ring, dmaaddr, - ring->rx_buffersize); - goto drop; - } - - unmap_descbuffer(ring, dmaaddr, ring->rx_buffersize, 0); - skb_put(skb, len + ring->frameoffset); - skb_pull(skb, ring->frameoffset); - - bcm43xx_rx(ring->dev, skb, rxhdr); -drop: - return; -} - -void bcm43xx_dma_rx(struct bcm43xx_dmaring *ring) -{ - const struct bcm43xx_dma_ops *ops = ring->ops; - int slot, current_slot; - int used_slots = 0; - - assert(!ring->tx); - current_slot = ops->get_current_rxslot(ring); - assert(current_slot >= 0 && current_slot < ring->nr_slots); - - slot = ring->current_slot; - for ( ; slot != current_slot; slot = next_slot(ring, slot)) { - dma_rx(ring, &slot); - update_max_used_slots(ring, ++used_slots); - } - ops->set_current_rxslot(ring, slot); - ring->current_slot = slot; -} - -static void bcm43xx_dma_tx_suspend_ring(struct bcm43xx_dmaring *ring) -{ - unsigned long flags; - - spin_lock_irqsave(&ring->lock, flags); - assert(ring->tx); - ring->ops->tx_suspend(ring); - spin_unlock_irqrestore(&ring->lock, flags); -} - -static void bcm43xx_dma_tx_resume_ring(struct bcm43xx_dmaring *ring) -{ - unsigned long flags; - - spin_lock_irqsave(&ring->lock, flags); - assert(ring->tx); - ring->ops->tx_resume(ring); - spin_unlock_irqrestore(&ring->lock, flags); -} - -void bcm43xx_dma_tx_suspend(struct bcm43xx_wldev *dev) -{ - bcm43xx_power_saving_ctl_bits(dev, -1, 1); - bcm43xx_dma_tx_suspend_ring(dev->dma.tx_ring0); - bcm43xx_dma_tx_suspend_ring(dev->dma.tx_ring1); - bcm43xx_dma_tx_suspend_ring(dev->dma.tx_ring2); - bcm43xx_dma_tx_suspend_ring(dev->dma.tx_ring3); - bcm43xx_dma_tx_suspend_ring(dev->dma.tx_ring4); - bcm43xx_dma_tx_suspend_ring(dev->dma.tx_ring5); -} - -void bcm43xx_dma_tx_resume(struct bcm43xx_wldev *dev) -{ - bcm43xx_dma_tx_resume_ring(dev->dma.tx_ring5); - bcm43xx_dma_tx_resume_ring(dev->dma.tx_ring4); - bcm43xx_dma_tx_resume_ring(dev->dma.tx_ring3); - bcm43xx_dma_tx_resume_ring(dev->dma.tx_ring2); - bcm43xx_dma_tx_resume_ring(dev->dma.tx_ring1); - bcm43xx_dma_tx_resume_ring(dev->dma.tx_ring0); - bcm43xx_power_saving_ctl_bits(dev, -1, -1); -} |