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821 lines
20 KiB
821 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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|
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Broadcom B43 wireless driver |
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|
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PIO data transfer |
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|
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Copyright (c) 2005-2008 Michael Buesch <[email protected]> |
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*/ |
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|
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#include "b43.h" |
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#include "pio.h" |
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#include "dma.h" |
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#include "main.h" |
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#include "xmit.h" |
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|
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#include <linux/delay.h> |
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#include <linux/sched.h> |
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#include <linux/slab.h> |
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static u16 generate_cookie(struct b43_pio_txqueue *q, |
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struct b43_pio_txpacket *pack) |
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{ |
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u16 cookie; |
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|
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/* Use the upper 4 bits of the cookie as |
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* PIO controller ID and store the packet index number |
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* in the lower 12 bits. |
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* Note that the cookie must never be 0, as this |
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* is a special value used in RX path. |
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* It can also not be 0xFFFF because that is special |
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* for multicast frames. |
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*/ |
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cookie = (((u16)q->index + 1) << 12); |
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cookie |= pack->index; |
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|
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return cookie; |
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} |
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static |
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struct b43_pio_txqueue *parse_cookie(struct b43_wldev *dev, |
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u16 cookie, |
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struct b43_pio_txpacket **pack) |
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{ |
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struct b43_pio *pio = &dev->pio; |
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struct b43_pio_txqueue *q = NULL; |
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unsigned int pack_index; |
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|
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switch (cookie & 0xF000) { |
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case 0x1000: |
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q = pio->tx_queue_AC_BK; |
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break; |
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case 0x2000: |
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q = pio->tx_queue_AC_BE; |
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break; |
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case 0x3000: |
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q = pio->tx_queue_AC_VI; |
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break; |
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case 0x4000: |
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q = pio->tx_queue_AC_VO; |
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break; |
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case 0x5000: |
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q = pio->tx_queue_mcast; |
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break; |
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} |
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if (B43_WARN_ON(!q)) |
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return NULL; |
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pack_index = (cookie & 0x0FFF); |
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if (B43_WARN_ON(pack_index >= ARRAY_SIZE(q->packets))) |
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return NULL; |
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*pack = &q->packets[pack_index]; |
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|
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return q; |
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} |
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|
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static u16 index_to_pioqueue_base(struct b43_wldev *dev, |
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unsigned int index) |
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{ |
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static const u16 bases[] = { |
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B43_MMIO_PIO_BASE0, |
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B43_MMIO_PIO_BASE1, |
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B43_MMIO_PIO_BASE2, |
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B43_MMIO_PIO_BASE3, |
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B43_MMIO_PIO_BASE4, |
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B43_MMIO_PIO_BASE5, |
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B43_MMIO_PIO_BASE6, |
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B43_MMIO_PIO_BASE7, |
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}; |
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static const u16 bases_rev11[] = { |
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B43_MMIO_PIO11_BASE0, |
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B43_MMIO_PIO11_BASE1, |
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B43_MMIO_PIO11_BASE2, |
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B43_MMIO_PIO11_BASE3, |
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B43_MMIO_PIO11_BASE4, |
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B43_MMIO_PIO11_BASE5, |
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}; |
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|
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if (dev->dev->core_rev >= 11) { |
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B43_WARN_ON(index >= ARRAY_SIZE(bases_rev11)); |
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return bases_rev11[index]; |
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} |
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B43_WARN_ON(index >= ARRAY_SIZE(bases)); |
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return bases[index]; |
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} |
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|
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static u16 pio_txqueue_offset(struct b43_wldev *dev) |
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{ |
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if (dev->dev->core_rev >= 11) |
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return 0x18; |
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return 0; |
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} |
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static u16 pio_rxqueue_offset(struct b43_wldev *dev) |
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{ |
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if (dev->dev->core_rev >= 11) |
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return 0x38; |
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return 8; |
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} |
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|
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static struct b43_pio_txqueue *b43_setup_pioqueue_tx(struct b43_wldev *dev, |
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unsigned int index) |
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{ |
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struct b43_pio_txqueue *q; |
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struct b43_pio_txpacket *p; |
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unsigned int i; |
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|
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q = kzalloc(sizeof(*q), GFP_KERNEL); |
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if (!q) |
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return NULL; |
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q->dev = dev; |
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q->rev = dev->dev->core_rev; |
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q->mmio_base = index_to_pioqueue_base(dev, index) + |
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pio_txqueue_offset(dev); |
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q->index = index; |
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|
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q->free_packet_slots = B43_PIO_MAX_NR_TXPACKETS; |
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if (q->rev >= 8) { |
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q->buffer_size = 1920; //FIXME this constant is wrong. |
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} else { |
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q->buffer_size = b43_piotx_read16(q, B43_PIO_TXQBUFSIZE); |
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q->buffer_size -= 80; |
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} |
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|
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INIT_LIST_HEAD(&q->packets_list); |
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for (i = 0; i < ARRAY_SIZE(q->packets); i++) { |
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p = &(q->packets[i]); |
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INIT_LIST_HEAD(&p->list); |
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p->index = i; |
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p->queue = q; |
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list_add(&p->list, &q->packets_list); |
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} |
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|
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return q; |
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} |
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static struct b43_pio_rxqueue *b43_setup_pioqueue_rx(struct b43_wldev *dev, |
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unsigned int index) |
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{ |
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struct b43_pio_rxqueue *q; |
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|
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q = kzalloc(sizeof(*q), GFP_KERNEL); |
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if (!q) |
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return NULL; |
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q->dev = dev; |
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q->rev = dev->dev->core_rev; |
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q->mmio_base = index_to_pioqueue_base(dev, index) + |
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pio_rxqueue_offset(dev); |
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|
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/* Enable Direct FIFO RX (PIO) on the engine. */ |
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b43_dma_direct_fifo_rx(dev, index, 1); |
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|
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return q; |
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} |
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static void b43_pio_cancel_tx_packets(struct b43_pio_txqueue *q) |
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{ |
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struct b43_pio_txpacket *pack; |
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unsigned int i; |
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|
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for (i = 0; i < ARRAY_SIZE(q->packets); i++) { |
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pack = &(q->packets[i]); |
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if (pack->skb) { |
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ieee80211_free_txskb(q->dev->wl->hw, pack->skb); |
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pack->skb = NULL; |
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} |
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} |
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} |
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static void b43_destroy_pioqueue_tx(struct b43_pio_txqueue *q, |
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const char *name) |
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{ |
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if (!q) |
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return; |
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b43_pio_cancel_tx_packets(q); |
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kfree(q); |
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} |
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static void b43_destroy_pioqueue_rx(struct b43_pio_rxqueue *q, |
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const char *name) |
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{ |
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if (!q) |
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return; |
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kfree(q); |
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} |
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#define destroy_queue_tx(pio, queue) do { \ |
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b43_destroy_pioqueue_tx((pio)->queue, __stringify(queue)); \ |
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(pio)->queue = NULL; \ |
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} while (0) |
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|
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#define destroy_queue_rx(pio, queue) do { \ |
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b43_destroy_pioqueue_rx((pio)->queue, __stringify(queue)); \ |
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(pio)->queue = NULL; \ |
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} while (0) |
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void b43_pio_free(struct b43_wldev *dev) |
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{ |
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struct b43_pio *pio; |
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|
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if (!b43_using_pio_transfers(dev)) |
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return; |
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pio = &dev->pio; |
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destroy_queue_rx(pio, rx_queue); |
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destroy_queue_tx(pio, tx_queue_mcast); |
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destroy_queue_tx(pio, tx_queue_AC_VO); |
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destroy_queue_tx(pio, tx_queue_AC_VI); |
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destroy_queue_tx(pio, tx_queue_AC_BE); |
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destroy_queue_tx(pio, tx_queue_AC_BK); |
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} |
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int b43_pio_init(struct b43_wldev *dev) |
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{ |
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struct b43_pio *pio = &dev->pio; |
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int err = -ENOMEM; |
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|
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b43_write32(dev, B43_MMIO_MACCTL, b43_read32(dev, B43_MMIO_MACCTL) |
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& ~B43_MACCTL_BE); |
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b43_shm_write16(dev, B43_SHM_SHARED, B43_SHM_SH_RXPADOFF, 0); |
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pio->tx_queue_AC_BK = b43_setup_pioqueue_tx(dev, 0); |
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if (!pio->tx_queue_AC_BK) |
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goto out; |
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pio->tx_queue_AC_BE = b43_setup_pioqueue_tx(dev, 1); |
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if (!pio->tx_queue_AC_BE) |
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goto err_destroy_bk; |
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pio->tx_queue_AC_VI = b43_setup_pioqueue_tx(dev, 2); |
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if (!pio->tx_queue_AC_VI) |
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goto err_destroy_be; |
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pio->tx_queue_AC_VO = b43_setup_pioqueue_tx(dev, 3); |
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if (!pio->tx_queue_AC_VO) |
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goto err_destroy_vi; |
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pio->tx_queue_mcast = b43_setup_pioqueue_tx(dev, 4); |
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if (!pio->tx_queue_mcast) |
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goto err_destroy_vo; |
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pio->rx_queue = b43_setup_pioqueue_rx(dev, 0); |
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if (!pio->rx_queue) |
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goto err_destroy_mcast; |
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b43dbg(dev->wl, "PIO initialized\n"); |
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err = 0; |
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out: |
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return err; |
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err_destroy_mcast: |
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destroy_queue_tx(pio, tx_queue_mcast); |
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err_destroy_vo: |
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destroy_queue_tx(pio, tx_queue_AC_VO); |
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err_destroy_vi: |
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destroy_queue_tx(pio, tx_queue_AC_VI); |
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err_destroy_be: |
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destroy_queue_tx(pio, tx_queue_AC_BE); |
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err_destroy_bk: |
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destroy_queue_tx(pio, tx_queue_AC_BK); |
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return err; |
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} |
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|
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/* Static mapping of mac80211's queues (priorities) to b43 PIO queues. */ |
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static struct b43_pio_txqueue *select_queue_by_priority(struct b43_wldev *dev, |
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u8 queue_prio) |
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{ |
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struct b43_pio_txqueue *q; |
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|
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if (dev->qos_enabled) { |
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/* 0 = highest priority */ |
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switch (queue_prio) { |
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default: |
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B43_WARN_ON(1); |
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fallthrough; |
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case 0: |
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q = dev->pio.tx_queue_AC_VO; |
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break; |
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case 1: |
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q = dev->pio.tx_queue_AC_VI; |
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break; |
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case 2: |
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q = dev->pio.tx_queue_AC_BE; |
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break; |
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case 3: |
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q = dev->pio.tx_queue_AC_BK; |
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break; |
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} |
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} else |
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q = dev->pio.tx_queue_AC_BE; |
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return q; |
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} |
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static u16 tx_write_2byte_queue(struct b43_pio_txqueue *q, |
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u16 ctl, |
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const void *_data, |
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unsigned int data_len) |
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{ |
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struct b43_wldev *dev = q->dev; |
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struct b43_wl *wl = dev->wl; |
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const u8 *data = _data; |
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ctl |= B43_PIO_TXCTL_WRITELO | B43_PIO_TXCTL_WRITEHI; |
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b43_piotx_write16(q, B43_PIO_TXCTL, ctl); |
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b43_block_write(dev, data, (data_len & ~1), |
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q->mmio_base + B43_PIO_TXDATA, |
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sizeof(u16)); |
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if (data_len & 1) { |
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u8 *tail = wl->pio_tailspace; |
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BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 2); |
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|
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/* Write the last byte. */ |
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ctl &= ~B43_PIO_TXCTL_WRITEHI; |
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b43_piotx_write16(q, B43_PIO_TXCTL, ctl); |
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tail[0] = data[data_len - 1]; |
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tail[1] = 0; |
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b43_block_write(dev, tail, 2, |
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q->mmio_base + B43_PIO_TXDATA, |
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sizeof(u16)); |
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} |
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|
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return ctl; |
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} |
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static void pio_tx_frame_2byte_queue(struct b43_pio_txpacket *pack, |
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const u8 *hdr, unsigned int hdrlen) |
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{ |
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struct b43_pio_txqueue *q = pack->queue; |
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const char *frame = pack->skb->data; |
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unsigned int frame_len = pack->skb->len; |
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u16 ctl; |
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|
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ctl = b43_piotx_read16(q, B43_PIO_TXCTL); |
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ctl |= B43_PIO_TXCTL_FREADY; |
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ctl &= ~B43_PIO_TXCTL_EOF; |
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|
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/* Transfer the header data. */ |
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ctl = tx_write_2byte_queue(q, ctl, hdr, hdrlen); |
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/* Transfer the frame data. */ |
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ctl = tx_write_2byte_queue(q, ctl, frame, frame_len); |
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|
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ctl |= B43_PIO_TXCTL_EOF; |
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b43_piotx_write16(q, B43_PIO_TXCTL, ctl); |
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} |
|
|
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static u32 tx_write_4byte_queue(struct b43_pio_txqueue *q, |
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u32 ctl, |
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const void *_data, |
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unsigned int data_len) |
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{ |
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struct b43_wldev *dev = q->dev; |
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struct b43_wl *wl = dev->wl; |
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const u8 *data = _data; |
|
|
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ctl |= B43_PIO8_TXCTL_0_7 | B43_PIO8_TXCTL_8_15 | |
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B43_PIO8_TXCTL_16_23 | B43_PIO8_TXCTL_24_31; |
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b43_piotx_write32(q, B43_PIO8_TXCTL, ctl); |
|
|
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b43_block_write(dev, data, (data_len & ~3), |
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q->mmio_base + B43_PIO8_TXDATA, |
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sizeof(u32)); |
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if (data_len & 3) { |
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u8 *tail = wl->pio_tailspace; |
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BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 4); |
|
|
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memset(tail, 0, 4); |
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/* Write the last few bytes. */ |
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ctl &= ~(B43_PIO8_TXCTL_8_15 | B43_PIO8_TXCTL_16_23 | |
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B43_PIO8_TXCTL_24_31); |
|
switch (data_len & 3) { |
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case 3: |
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ctl |= B43_PIO8_TXCTL_16_23 | B43_PIO8_TXCTL_8_15; |
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tail[0] = data[data_len - 3]; |
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tail[1] = data[data_len - 2]; |
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tail[2] = data[data_len - 1]; |
|
break; |
|
case 2: |
|
ctl |= B43_PIO8_TXCTL_8_15; |
|
tail[0] = data[data_len - 2]; |
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tail[1] = data[data_len - 1]; |
|
break; |
|
case 1: |
|
tail[0] = data[data_len - 1]; |
|
break; |
|
} |
|
b43_piotx_write32(q, B43_PIO8_TXCTL, ctl); |
|
b43_block_write(dev, tail, 4, |
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q->mmio_base + B43_PIO8_TXDATA, |
|
sizeof(u32)); |
|
} |
|
|
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return ctl; |
|
} |
|
|
|
static void pio_tx_frame_4byte_queue(struct b43_pio_txpacket *pack, |
|
const u8 *hdr, unsigned int hdrlen) |
|
{ |
|
struct b43_pio_txqueue *q = pack->queue; |
|
const char *frame = pack->skb->data; |
|
unsigned int frame_len = pack->skb->len; |
|
u32 ctl; |
|
|
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ctl = b43_piotx_read32(q, B43_PIO8_TXCTL); |
|
ctl |= B43_PIO8_TXCTL_FREADY; |
|
ctl &= ~B43_PIO8_TXCTL_EOF; |
|
|
|
/* Transfer the header data. */ |
|
ctl = tx_write_4byte_queue(q, ctl, hdr, hdrlen); |
|
/* Transfer the frame data. */ |
|
ctl = tx_write_4byte_queue(q, ctl, frame, frame_len); |
|
|
|
ctl |= B43_PIO8_TXCTL_EOF; |
|
b43_piotx_write32(q, B43_PIO_TXCTL, ctl); |
|
} |
|
|
|
static int pio_tx_frame(struct b43_pio_txqueue *q, |
|
struct sk_buff *skb) |
|
{ |
|
struct b43_wldev *dev = q->dev; |
|
struct b43_wl *wl = dev->wl; |
|
struct b43_pio_txpacket *pack; |
|
u16 cookie; |
|
int err; |
|
unsigned int hdrlen; |
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
|
struct b43_txhdr *txhdr = (struct b43_txhdr *)wl->pio_scratchspace; |
|
|
|
B43_WARN_ON(list_empty(&q->packets_list)); |
|
pack = list_entry(q->packets_list.next, |
|
struct b43_pio_txpacket, list); |
|
|
|
cookie = generate_cookie(q, pack); |
|
hdrlen = b43_txhdr_size(dev); |
|
BUILD_BUG_ON(sizeof(wl->pio_scratchspace) < sizeof(struct b43_txhdr)); |
|
B43_WARN_ON(sizeof(wl->pio_scratchspace) < hdrlen); |
|
err = b43_generate_txhdr(dev, (u8 *)txhdr, skb, |
|
info, cookie); |
|
if (err) |
|
return err; |
|
|
|
if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { |
|
/* Tell the firmware about the cookie of the last |
|
* mcast frame, so it can clear the more-data bit in it. */ |
|
b43_shm_write16(dev, B43_SHM_SHARED, |
|
B43_SHM_SH_MCASTCOOKIE, cookie); |
|
} |
|
|
|
pack->skb = skb; |
|
if (q->rev >= 8) |
|
pio_tx_frame_4byte_queue(pack, (const u8 *)txhdr, hdrlen); |
|
else |
|
pio_tx_frame_2byte_queue(pack, (const u8 *)txhdr, hdrlen); |
|
|
|
/* Remove it from the list of available packet slots. |
|
* It will be put back when we receive the status report. */ |
|
list_del(&pack->list); |
|
|
|
/* Update the queue statistics. */ |
|
q->buffer_used += roundup(skb->len + hdrlen, 4); |
|
q->free_packet_slots -= 1; |
|
|
|
return 0; |
|
} |
|
|
|
int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb) |
|
{ |
|
struct b43_pio_txqueue *q; |
|
struct ieee80211_hdr *hdr; |
|
unsigned int hdrlen, total_len; |
|
int err = 0; |
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
|
|
|
hdr = (struct ieee80211_hdr *)skb->data; |
|
|
|
if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { |
|
/* The multicast queue will be sent after the DTIM. */ |
|
q = dev->pio.tx_queue_mcast; |
|
/* Set the frame More-Data bit. Ucode will clear it |
|
* for us on the last frame. */ |
|
hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); |
|
} else { |
|
/* Decide by priority where to put this frame. */ |
|
q = select_queue_by_priority(dev, skb_get_queue_mapping(skb)); |
|
} |
|
|
|
hdrlen = b43_txhdr_size(dev); |
|
total_len = roundup(skb->len + hdrlen, 4); |
|
|
|
if (unlikely(total_len > q->buffer_size)) { |
|
err = -ENOBUFS; |
|
b43dbg(dev->wl, "PIO: TX packet longer than queue.\n"); |
|
goto out; |
|
} |
|
if (unlikely(q->free_packet_slots == 0)) { |
|
err = -ENOBUFS; |
|
b43warn(dev->wl, "PIO: TX packet overflow.\n"); |
|
goto out; |
|
} |
|
B43_WARN_ON(q->buffer_used > q->buffer_size); |
|
|
|
if (total_len > (q->buffer_size - q->buffer_used)) { |
|
/* Not enough memory on the queue. */ |
|
err = -EBUSY; |
|
ieee80211_stop_queue(dev->wl->hw, skb_get_queue_mapping(skb)); |
|
q->stopped = true; |
|
goto out; |
|
} |
|
|
|
/* Assign the queue number to the ring (if not already done before) |
|
* so TX status handling can use it. The mac80211-queue to b43-queue |
|
* mapping is static, so we don't need to store it per frame. */ |
|
q->queue_prio = skb_get_queue_mapping(skb); |
|
|
|
err = pio_tx_frame(q, skb); |
|
if (unlikely(err == -ENOKEY)) { |
|
/* Drop this packet, as we don't have the encryption key |
|
* anymore and must not transmit it unencrypted. */ |
|
ieee80211_free_txskb(dev->wl->hw, skb); |
|
err = 0; |
|
goto out; |
|
} |
|
if (unlikely(err)) { |
|
b43err(dev->wl, "PIO transmission failure\n"); |
|
goto out; |
|
} |
|
|
|
B43_WARN_ON(q->buffer_used > q->buffer_size); |
|
if (((q->buffer_size - q->buffer_used) < roundup(2 + 2 + 6, 4)) || |
|
(q->free_packet_slots == 0)) { |
|
/* The queue is full. */ |
|
ieee80211_stop_queue(dev->wl->hw, skb_get_queue_mapping(skb)); |
|
q->stopped = true; |
|
} |
|
|
|
out: |
|
return err; |
|
} |
|
|
|
void b43_pio_handle_txstatus(struct b43_wldev *dev, |
|
const struct b43_txstatus *status) |
|
{ |
|
struct b43_pio_txqueue *q; |
|
struct b43_pio_txpacket *pack = NULL; |
|
unsigned int total_len; |
|
struct ieee80211_tx_info *info; |
|
|
|
q = parse_cookie(dev, status->cookie, &pack); |
|
if (unlikely(!q)) |
|
return; |
|
B43_WARN_ON(!pack); |
|
|
|
info = IEEE80211_SKB_CB(pack->skb); |
|
|
|
b43_fill_txstatus_report(dev, info, status); |
|
|
|
total_len = pack->skb->len + b43_txhdr_size(dev); |
|
total_len = roundup(total_len, 4); |
|
q->buffer_used -= total_len; |
|
q->free_packet_slots += 1; |
|
|
|
ieee80211_tx_status(dev->wl->hw, pack->skb); |
|
pack->skb = NULL; |
|
list_add(&pack->list, &q->packets_list); |
|
|
|
if (q->stopped) { |
|
ieee80211_wake_queue(dev->wl->hw, q->queue_prio); |
|
q->stopped = false; |
|
} |
|
} |
|
|
|
/* Returns whether we should fetch another frame. */ |
|
static bool pio_rx_frame(struct b43_pio_rxqueue *q) |
|
{ |
|
struct b43_wldev *dev = q->dev; |
|
struct b43_wl *wl = dev->wl; |
|
u16 len; |
|
u32 macstat = 0; |
|
unsigned int i, padding; |
|
struct sk_buff *skb; |
|
const char *err_msg = NULL; |
|
struct b43_rxhdr_fw4 *rxhdr = |
|
(struct b43_rxhdr_fw4 *)wl->pio_scratchspace; |
|
size_t rxhdr_size = sizeof(*rxhdr); |
|
|
|
BUILD_BUG_ON(sizeof(wl->pio_scratchspace) < sizeof(*rxhdr)); |
|
switch (dev->fw.hdr_format) { |
|
case B43_FW_HDR_410: |
|
case B43_FW_HDR_351: |
|
rxhdr_size -= sizeof(rxhdr->format_598) - |
|
sizeof(rxhdr->format_351); |
|
break; |
|
case B43_FW_HDR_598: |
|
break; |
|
} |
|
memset(rxhdr, 0, rxhdr_size); |
|
|
|
/* Check if we have data and wait for it to get ready. */ |
|
if (q->rev >= 8) { |
|
u32 ctl; |
|
|
|
ctl = b43_piorx_read32(q, B43_PIO8_RXCTL); |
|
if (!(ctl & B43_PIO8_RXCTL_FRAMERDY)) |
|
return false; |
|
b43_piorx_write32(q, B43_PIO8_RXCTL, |
|
B43_PIO8_RXCTL_FRAMERDY); |
|
for (i = 0; i < 10; i++) { |
|
ctl = b43_piorx_read32(q, B43_PIO8_RXCTL); |
|
if (ctl & B43_PIO8_RXCTL_DATARDY) |
|
goto data_ready; |
|
udelay(10); |
|
} |
|
} else { |
|
u16 ctl; |
|
|
|
ctl = b43_piorx_read16(q, B43_PIO_RXCTL); |
|
if (!(ctl & B43_PIO_RXCTL_FRAMERDY)) |
|
return false; |
|
b43_piorx_write16(q, B43_PIO_RXCTL, |
|
B43_PIO_RXCTL_FRAMERDY); |
|
for (i = 0; i < 10; i++) { |
|
ctl = b43_piorx_read16(q, B43_PIO_RXCTL); |
|
if (ctl & B43_PIO_RXCTL_DATARDY) |
|
goto data_ready; |
|
udelay(10); |
|
} |
|
} |
|
b43dbg(q->dev->wl, "PIO RX timed out\n"); |
|
return true; |
|
data_ready: |
|
|
|
/* Get the preamble (RX header) */ |
|
if (q->rev >= 8) { |
|
b43_block_read(dev, rxhdr, rxhdr_size, |
|
q->mmio_base + B43_PIO8_RXDATA, |
|
sizeof(u32)); |
|
} else { |
|
b43_block_read(dev, rxhdr, rxhdr_size, |
|
q->mmio_base + B43_PIO_RXDATA, |
|
sizeof(u16)); |
|
} |
|
/* Sanity checks. */ |
|
len = le16_to_cpu(rxhdr->frame_len); |
|
if (unlikely(len > 0x700)) { |
|
err_msg = "len > 0x700"; |
|
goto rx_error; |
|
} |
|
if (unlikely(len == 0)) { |
|
err_msg = "len == 0"; |
|
goto rx_error; |
|
} |
|
|
|
switch (dev->fw.hdr_format) { |
|
case B43_FW_HDR_598: |
|
macstat = le32_to_cpu(rxhdr->format_598.mac_status); |
|
break; |
|
case B43_FW_HDR_410: |
|
case B43_FW_HDR_351: |
|
macstat = le32_to_cpu(rxhdr->format_351.mac_status); |
|
break; |
|
} |
|
if (macstat & B43_RX_MAC_FCSERR) { |
|
if (!(q->dev->wl->filter_flags & FIF_FCSFAIL)) { |
|
/* Drop frames with failed FCS. */ |
|
err_msg = "Frame FCS error"; |
|
goto rx_error; |
|
} |
|
} |
|
|
|
/* We always pad 2 bytes, as that's what upstream code expects |
|
* due to the RX-header being 30 bytes. In case the frame is |
|
* unaligned, we pad another 2 bytes. */ |
|
padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0; |
|
skb = dev_alloc_skb(len + padding + 2); |
|
if (unlikely(!skb)) { |
|
err_msg = "Out of memory"; |
|
goto rx_error; |
|
} |
|
skb_reserve(skb, 2); |
|
skb_put(skb, len + padding); |
|
if (q->rev >= 8) { |
|
b43_block_read(dev, skb->data + padding, (len & ~3), |
|
q->mmio_base + B43_PIO8_RXDATA, |
|
sizeof(u32)); |
|
if (len & 3) { |
|
u8 *tail = wl->pio_tailspace; |
|
BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 4); |
|
|
|
/* Read the last few bytes. */ |
|
b43_block_read(dev, tail, 4, |
|
q->mmio_base + B43_PIO8_RXDATA, |
|
sizeof(u32)); |
|
switch (len & 3) { |
|
case 3: |
|
skb->data[len + padding - 3] = tail[0]; |
|
skb->data[len + padding - 2] = tail[1]; |
|
skb->data[len + padding - 1] = tail[2]; |
|
break; |
|
case 2: |
|
skb->data[len + padding - 2] = tail[0]; |
|
skb->data[len + padding - 1] = tail[1]; |
|
break; |
|
case 1: |
|
skb->data[len + padding - 1] = tail[0]; |
|
break; |
|
} |
|
} |
|
} else { |
|
b43_block_read(dev, skb->data + padding, (len & ~1), |
|
q->mmio_base + B43_PIO_RXDATA, |
|
sizeof(u16)); |
|
if (len & 1) { |
|
u8 *tail = wl->pio_tailspace; |
|
BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 2); |
|
|
|
/* Read the last byte. */ |
|
b43_block_read(dev, tail, 2, |
|
q->mmio_base + B43_PIO_RXDATA, |
|
sizeof(u16)); |
|
skb->data[len + padding - 1] = tail[0]; |
|
} |
|
} |
|
|
|
b43_rx(q->dev, skb, rxhdr); |
|
|
|
return true; |
|
|
|
rx_error: |
|
if (err_msg) |
|
b43dbg(q->dev->wl, "PIO RX error: %s\n", err_msg); |
|
if (q->rev >= 8) |
|
b43_piorx_write32(q, B43_PIO8_RXCTL, B43_PIO8_RXCTL_DATARDY); |
|
else |
|
b43_piorx_write16(q, B43_PIO_RXCTL, B43_PIO_RXCTL_DATARDY); |
|
|
|
return true; |
|
} |
|
|
|
void b43_pio_rx(struct b43_pio_rxqueue *q) |
|
{ |
|
unsigned int count = 0; |
|
bool stop; |
|
|
|
while (1) { |
|
stop = !pio_rx_frame(q); |
|
if (stop) |
|
break; |
|
cond_resched(); |
|
if (WARN_ON_ONCE(++count > 10000)) |
|
break; |
|
} |
|
} |
|
|
|
static void b43_pio_tx_suspend_queue(struct b43_pio_txqueue *q) |
|
{ |
|
if (q->rev >= 8) { |
|
b43_piotx_write32(q, B43_PIO8_TXCTL, |
|
b43_piotx_read32(q, B43_PIO8_TXCTL) |
|
| B43_PIO8_TXCTL_SUSPREQ); |
|
} else { |
|
b43_piotx_write16(q, B43_PIO_TXCTL, |
|
b43_piotx_read16(q, B43_PIO_TXCTL) |
|
| B43_PIO_TXCTL_SUSPREQ); |
|
} |
|
} |
|
|
|
static void b43_pio_tx_resume_queue(struct b43_pio_txqueue *q) |
|
{ |
|
if (q->rev >= 8) { |
|
b43_piotx_write32(q, B43_PIO8_TXCTL, |
|
b43_piotx_read32(q, B43_PIO8_TXCTL) |
|
& ~B43_PIO8_TXCTL_SUSPREQ); |
|
} else { |
|
b43_piotx_write16(q, B43_PIO_TXCTL, |
|
b43_piotx_read16(q, B43_PIO_TXCTL) |
|
& ~B43_PIO_TXCTL_SUSPREQ); |
|
} |
|
} |
|
|
|
void b43_pio_tx_suspend(struct b43_wldev *dev) |
|
{ |
|
b43_power_saving_ctl_bits(dev, B43_PS_AWAKE); |
|
b43_pio_tx_suspend_queue(dev->pio.tx_queue_AC_BK); |
|
b43_pio_tx_suspend_queue(dev->pio.tx_queue_AC_BE); |
|
b43_pio_tx_suspend_queue(dev->pio.tx_queue_AC_VI); |
|
b43_pio_tx_suspend_queue(dev->pio.tx_queue_AC_VO); |
|
b43_pio_tx_suspend_queue(dev->pio.tx_queue_mcast); |
|
} |
|
|
|
void b43_pio_tx_resume(struct b43_wldev *dev) |
|
{ |
|
b43_pio_tx_resume_queue(dev->pio.tx_queue_mcast); |
|
b43_pio_tx_resume_queue(dev->pio.tx_queue_AC_VO); |
|
b43_pio_tx_resume_queue(dev->pio.tx_queue_AC_VI); |
|
b43_pio_tx_resume_queue(dev->pio.tx_queue_AC_BE); |
|
b43_pio_tx_resume_queue(dev->pio.tx_queue_AC_BK); |
|
b43_power_saving_ctl_bits(dev, 0); |
|
}
|
|
|