mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b43: finish removal of pio support
As suggested in "b43: Remove PIO support"... Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
John W. Linville
David S. Miller
parent
17f65f814f
commit
3543f8069d
@ -1,652 +0,0 @@
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/*
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Broadcom B43 wireless driver
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PIO Transmission
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Copyright (c) 2005 Michael Buesch <mb@bu3sch.de>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include "b43.h"
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#include "pio.h"
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#include "main.h"
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#include "xmit.h"
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#include <linux/delay.h>
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static void tx_start(struct b43_pioqueue *queue)
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{
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b43_pio_write(queue, B43_PIO_TXCTL, B43_PIO_TXCTL_INIT);
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}
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static void tx_octet(struct b43_pioqueue *queue, u8 octet)
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{
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if (queue->need_workarounds) {
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b43_pio_write(queue, B43_PIO_TXDATA, octet);
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b43_pio_write(queue, B43_PIO_TXCTL, B43_PIO_TXCTL_WRITELO);
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} else {
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b43_pio_write(queue, B43_PIO_TXCTL, B43_PIO_TXCTL_WRITELO);
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b43_pio_write(queue, B43_PIO_TXDATA, octet);
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}
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}
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static u16 tx_get_next_word(const u8 * txhdr,
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const u8 * packet,
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size_t txhdr_size, unsigned int *pos)
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{
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const u8 *source;
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unsigned int i = *pos;
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u16 ret;
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if (i < txhdr_size) {
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source = txhdr;
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} else {
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source = packet;
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i -= txhdr_size;
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}
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ret = le16_to_cpu(*((__le16 *)(source + i)));
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*pos += 2;
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return ret;
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}
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static void tx_data(struct b43_pioqueue *queue,
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u8 * txhdr, const u8 * packet, unsigned int octets)
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{
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u16 data;
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unsigned int i = 0;
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if (queue->need_workarounds) {
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data = tx_get_next_word(txhdr, packet,
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sizeof(struct b43_txhdr_fw4), &i);
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b43_pio_write(queue, B43_PIO_TXDATA, data);
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}
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b43_pio_write(queue, B43_PIO_TXCTL,
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B43_PIO_TXCTL_WRITELO | B43_PIO_TXCTL_WRITEHI);
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while (i < octets - 1) {
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data = tx_get_next_word(txhdr, packet,
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sizeof(struct b43_txhdr_fw4), &i);
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b43_pio_write(queue, B43_PIO_TXDATA, data);
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}
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if (octets % 2)
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tx_octet(queue,
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packet[octets - sizeof(struct b43_txhdr_fw4) - 1]);
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}
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static void tx_complete(struct b43_pioqueue *queue, struct sk_buff *skb)
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{
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if (queue->need_workarounds) {
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b43_pio_write(queue, B43_PIO_TXDATA, skb->data[skb->len - 1]);
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b43_pio_write(queue, B43_PIO_TXCTL,
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B43_PIO_TXCTL_WRITELO | B43_PIO_TXCTL_COMPLETE);
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} else {
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b43_pio_write(queue, B43_PIO_TXCTL, B43_PIO_TXCTL_COMPLETE);
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}
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}
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static u16 generate_cookie(struct b43_pioqueue *queue,
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struct b43_pio_txpacket *packet)
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{
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u16 cookie = 0x0000;
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u16 packetindex;
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/* We use the upper 4 bits for the PIO
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* controller ID and the lower 12 bits
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* for the packet index (in the cache).
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*/
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switch (queue->mmio_base) {
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case B43_MMIO_PIO1_BASE:
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break;
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case B43_MMIO_PIO2_BASE:
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cookie = 0x1000;
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break;
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case B43_MMIO_PIO3_BASE:
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cookie = 0x2000;
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break;
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case B43_MMIO_PIO4_BASE:
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cookie = 0x3000;
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break;
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default:
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B43_WARN_ON(1);
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}
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packetindex = packet->index;
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B43_WARN_ON(packetindex & ~0x0FFF);
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cookie |= (u16) packetindex;
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return cookie;
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}
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static
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struct b43_pioqueue *parse_cookie(struct b43_wldev *dev,
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u16 cookie, struct b43_pio_txpacket **packet)
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{
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struct b43_pio *pio = &dev->pio;
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struct b43_pioqueue *queue = NULL;
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int packetindex;
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switch (cookie & 0xF000) {
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case 0x0000:
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queue = pio->queue0;
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break;
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case 0x1000:
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queue = pio->queue1;
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break;
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case 0x2000:
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queue = pio->queue2;
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break;
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case 0x3000:
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queue = pio->queue3;
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break;
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default:
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B43_WARN_ON(1);
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}
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packetindex = (cookie & 0x0FFF);
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B43_WARN_ON(!(packetindex >= 0 && packetindex < B43_PIO_MAXTXPACKETS));
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*packet = &(queue->tx_packets_cache[packetindex]);
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return queue;
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}
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union txhdr_union {
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struct b43_txhdr_fw4 txhdr_fw4;
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};
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static void pio_tx_write_fragment(struct b43_pioqueue *queue,
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struct sk_buff *skb,
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struct b43_pio_txpacket *packet,
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size_t txhdr_size)
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{
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union txhdr_union txhdr_data;
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u8 *txhdr = NULL;
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unsigned int octets;
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txhdr = (u8 *) (&txhdr_data.txhdr_fw4);
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B43_WARN_ON(skb_shinfo(skb)->nr_frags);
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b43_generate_txhdr(queue->dev,
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txhdr, skb->data, skb->len,
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&packet->txstat.control,
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generate_cookie(queue, packet));
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tx_start(queue);
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octets = skb->len + txhdr_size;
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if (queue->need_workarounds)
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octets--;
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tx_data(queue, txhdr, (u8 *) skb->data, octets);
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tx_complete(queue, skb);
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}
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static void free_txpacket(struct b43_pio_txpacket *packet)
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{
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struct b43_pioqueue *queue = packet->queue;
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if (packet->skb)
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dev_kfree_skb_any(packet->skb);
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list_move(&packet->list, &queue->txfree);
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queue->nr_txfree++;
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}
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static int pio_tx_packet(struct b43_pio_txpacket *packet)
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{
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struct b43_pioqueue *queue = packet->queue;
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struct sk_buff *skb = packet->skb;
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u16 octets;
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octets = (u16) skb->len + sizeof(struct b43_txhdr_fw4);
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if (queue->tx_devq_size < octets) {
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b43warn(queue->dev->wl, "PIO queue too small. "
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"Dropping packet.\n");
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/* Drop it silently (return success) */
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free_txpacket(packet);
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return 0;
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}
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B43_WARN_ON(queue->tx_devq_packets > B43_PIO_MAXTXDEVQPACKETS);
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B43_WARN_ON(queue->tx_devq_used > queue->tx_devq_size);
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/* Check if there is sufficient free space on the device
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* TX queue. If not, return and let the TX tasklet
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* retry later.
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*/
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if (queue->tx_devq_packets == B43_PIO_MAXTXDEVQPACKETS)
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return -EBUSY;
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if (queue->tx_devq_used + octets > queue->tx_devq_size)
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return -EBUSY;
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/* Now poke the device. */
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pio_tx_write_fragment(queue, skb, packet, sizeof(struct b43_txhdr_fw4));
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/* Account for the packet size.
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* (We must not overflow the device TX queue)
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*/
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queue->tx_devq_packets++;
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queue->tx_devq_used += octets;
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/* Transmission started, everything ok, move the
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* packet to the txrunning list.
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*/
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list_move_tail(&packet->list, &queue->txrunning);
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return 0;
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}
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static void tx_tasklet(unsigned long d)
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{
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struct b43_pioqueue *queue = (struct b43_pioqueue *)d;
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struct b43_wldev *dev = queue->dev;
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unsigned long flags;
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struct b43_pio_txpacket *packet, *tmp_packet;
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int err;
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u16 txctl;
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spin_lock_irqsave(&dev->wl->irq_lock, flags);
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if (queue->tx_frozen)
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goto out_unlock;
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txctl = b43_pio_read(queue, B43_PIO_TXCTL);
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if (txctl & B43_PIO_TXCTL_SUSPEND)
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goto out_unlock;
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list_for_each_entry_safe(packet, tmp_packet, &queue->txqueue, list) {
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/* Try to transmit the packet. This can fail, if
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* the device queue is full. In case of failure, the
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* packet is left in the txqueue.
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* If transmission succeed, the packet is moved to txrunning.
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* If it is impossible to transmit the packet, it
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* is dropped.
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*/
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err = pio_tx_packet(packet);
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if (err)
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break;
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}
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out_unlock:
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spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
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}
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static void setup_txqueues(struct b43_pioqueue *queue)
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{
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struct b43_pio_txpacket *packet;
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int i;
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queue->nr_txfree = B43_PIO_MAXTXPACKETS;
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for (i = 0; i < B43_PIO_MAXTXPACKETS; i++) {
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packet = &(queue->tx_packets_cache[i]);
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packet->queue = queue;
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INIT_LIST_HEAD(&packet->list);
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packet->index = i;
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list_add(&packet->list, &queue->txfree);
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}
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}
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static
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struct b43_pioqueue *b43_setup_pioqueue(struct b43_wldev *dev,
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u16 pio_mmio_base)
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{
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struct b43_pioqueue *queue;
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u16 qsize;
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queue = kzalloc(sizeof(*queue), GFP_KERNEL);
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if (!queue)
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goto out;
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queue->dev = dev;
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queue->mmio_base = pio_mmio_base;
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queue->need_workarounds = (dev->dev->id.revision < 3);
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INIT_LIST_HEAD(&queue->txfree);
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INIT_LIST_HEAD(&queue->txqueue);
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INIT_LIST_HEAD(&queue->txrunning);
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tasklet_init(&queue->txtask, tx_tasklet, (unsigned long)queue);
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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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qsize = b43_read16(dev, queue->mmio_base + B43_PIO_TXQBUFSIZE);
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if (qsize == 0) {
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b43err(dev->wl, "This card does not support PIO "
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"operation mode. Please use DMA mode "
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"(module parameter pio=0).\n");
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goto err_freequeue;
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}
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if (qsize <= B43_PIO_TXQADJUST) {
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b43err(dev->wl, "PIO tx device-queue too small (%u)\n", qsize);
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goto err_freequeue;
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}
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qsize -= B43_PIO_TXQADJUST;
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queue->tx_devq_size = qsize;
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setup_txqueues(queue);
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out:
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return queue;
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err_freequeue:
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kfree(queue);
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queue = NULL;
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goto out;
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}
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static void cancel_transfers(struct b43_pioqueue *queue)
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{
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struct b43_pio_txpacket *packet, *tmp_packet;
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tasklet_disable(&queue->txtask);
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list_for_each_entry_safe(packet, tmp_packet, &queue->txrunning, list)
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free_txpacket(packet);
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list_for_each_entry_safe(packet, tmp_packet, &queue->txqueue, list)
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free_txpacket(packet);
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}
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static void b43_destroy_pioqueue(struct b43_pioqueue *queue)
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{
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if (!queue)
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return;
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cancel_transfers(queue);
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kfree(queue);
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}
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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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if (!b43_using_pio(dev))
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return;
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pio = &dev->pio;
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b43_destroy_pioqueue(pio->queue3);
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pio->queue3 = NULL;
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b43_destroy_pioqueue(pio->queue2);
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pio->queue2 = NULL;
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b43_destroy_pioqueue(pio->queue1);
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pio->queue1 = NULL;
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b43_destroy_pioqueue(pio->queue0);
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pio->queue0 = NULL;
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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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struct b43_pioqueue *queue;
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int err = -ENOMEM;
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queue = b43_setup_pioqueue(dev, B43_MMIO_PIO1_BASE);
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if (!queue)
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goto out;
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pio->queue0 = queue;
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queue = b43_setup_pioqueue(dev, B43_MMIO_PIO2_BASE);
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if (!queue)
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goto err_destroy0;
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pio->queue1 = queue;
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queue = b43_setup_pioqueue(dev, B43_MMIO_PIO3_BASE);
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if (!queue)
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goto err_destroy1;
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pio->queue2 = queue;
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queue = b43_setup_pioqueue(dev, B43_MMIO_PIO4_BASE);
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if (!queue)
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goto err_destroy2;
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pio->queue3 = queue;
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if (dev->dev->id.revision < 3)
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dev->irq_savedstate |= B43_IRQ_PIO_WORKAROUND;
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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_destroy2:
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b43_destroy_pioqueue(pio->queue2);
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pio->queue2 = NULL;
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err_destroy1:
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b43_destroy_pioqueue(pio->queue1);
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pio->queue1 = NULL;
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err_destroy0:
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b43_destroy_pioqueue(pio->queue0);
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pio->queue0 = NULL;
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goto out;
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}
|
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|
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int b43_pio_tx(struct b43_wldev *dev,
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struct sk_buff *skb, struct ieee80211_tx_control *ctl)
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{
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struct b43_pioqueue *queue = dev->pio.queue1;
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struct b43_pio_txpacket *packet;
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B43_WARN_ON(queue->tx_suspended);
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B43_WARN_ON(list_empty(&queue->txfree));
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packet = list_entry(queue->txfree.next, struct b43_pio_txpacket, list);
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packet->skb = skb;
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memset(&packet->txstat, 0, sizeof(packet->txstat));
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memcpy(&packet->txstat.control, ctl, sizeof(*ctl));
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list_move_tail(&packet->list, &queue->txqueue);
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queue->nr_txfree--;
|
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queue->nr_tx_packets++;
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B43_WARN_ON(queue->nr_txfree >= B43_PIO_MAXTXPACKETS);
|
||||
|
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tasklet_schedule(&queue->txtask);
|
||||
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return 0;
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}
|
||||
|
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void b43_pio_handle_txstatus(struct b43_wldev *dev,
|
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const struct b43_txstatus *status)
|
||||
{
|
||||
struct b43_pioqueue *queue;
|
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struct b43_pio_txpacket *packet;
|
||||
|
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queue = parse_cookie(dev, status->cookie, &packet);
|
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if (B43_WARN_ON(!queue))
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return;
|
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|
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queue->tx_devq_packets--;
|
||||
queue->tx_devq_used -=
|
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(packet->skb->len + sizeof(struct b43_txhdr_fw4));
|
||||
|
||||
if (status->acked) {
|
||||
packet->txstat.flags |= IEEE80211_TX_STATUS_ACK;
|
||||
} else {
|
||||
if (!(packet->txstat.control.flags & IEEE80211_TXCTL_NO_ACK))
|
||||
packet->txstat.excessive_retries = 1;
|
||||
}
|
||||
if (status->frame_count == 0) {
|
||||
/* The frame was not transmitted at all. */
|
||||
packet->txstat.retry_count = 0;
|
||||
} else
|
||||
packet->txstat.retry_count = status->frame_count - 1;
|
||||
ieee80211_tx_status_irqsafe(dev->wl->hw, packet->skb,
|
||||
&(packet->txstat));
|
||||
packet->skb = NULL;
|
||||
|
||||
free_txpacket(packet);
|
||||
/* If there are packets on the txqueue, poke the tasklet
|
||||
* to transmit them.
|
||||
*/
|
||||
if (!list_empty(&queue->txqueue))
|
||||
tasklet_schedule(&queue->txtask);
|
||||
}
|
||||
|
||||
void b43_pio_get_tx_stats(struct b43_wldev *dev,
|
||||
struct ieee80211_tx_queue_stats *stats)
|
||||
{
|
||||
struct b43_pio *pio = &dev->pio;
|
||||
struct b43_pioqueue *queue;
|
||||
struct ieee80211_tx_queue_stats_data *data;
|
||||
|
||||
queue = pio->queue1;
|
||||
data = &(stats->data[0]);
|
||||
data->len = B43_PIO_MAXTXPACKETS - queue->nr_txfree;
|
||||
data->limit = B43_PIO_MAXTXPACKETS;
|
||||
data->count = queue->nr_tx_packets;
|
||||
}
|
||||
|
||||
static void pio_rx_error(struct b43_pioqueue *queue,
|
||||
int clear_buffers, const char *error)
|
||||
{
|
||||
int i;
|
||||
|
||||
b43err(queue->dev->wl, "PIO RX error: %s\n", error);
|
||||
b43_pio_write(queue, B43_PIO_RXCTL, B43_PIO_RXCTL_READY);
|
||||
if (clear_buffers) {
|
||||
B43_WARN_ON(queue->mmio_base != B43_MMIO_PIO1_BASE);
|
||||
for (i = 0; i < 15; i++) {
|
||||
/* Dummy read. */
|
||||
b43_pio_read(queue, B43_PIO_RXDATA);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void b43_pio_rx(struct b43_pioqueue *queue)
|
||||
{
|
||||
__le16 preamble[21] = { 0 };
|
||||
struct b43_rxhdr_fw4 *rxhdr;
|
||||
u16 tmp, len;
|
||||
u32 macstat;
|
||||
int i, preamble_readwords;
|
||||
struct sk_buff *skb;
|
||||
|
||||
tmp = b43_pio_read(queue, B43_PIO_RXCTL);
|
||||
if (!(tmp & B43_PIO_RXCTL_DATAAVAILABLE))
|
||||
return;
|
||||
b43_pio_write(queue, B43_PIO_RXCTL, B43_PIO_RXCTL_DATAAVAILABLE);
|
||||
|
||||
for (i = 0; i < 10; i++) {
|
||||
tmp = b43_pio_read(queue, B43_PIO_RXCTL);
|
||||
if (tmp & B43_PIO_RXCTL_READY)
|
||||
goto data_ready;
|
||||
udelay(10);
|
||||
}
|
||||
b43dbg(queue->dev->wl, "PIO RX timed out\n");
|
||||
return;
|
||||
data_ready:
|
||||
|
||||
len = b43_pio_read(queue, B43_PIO_RXDATA);
|
||||
if (unlikely(len > 0x700)) {
|
||||
pio_rx_error(queue, 0, "len > 0x700");
|
||||
return;
|
||||
}
|
||||
if (unlikely(len == 0 && queue->mmio_base != B43_MMIO_PIO4_BASE)) {
|
||||
pio_rx_error(queue, 0, "len == 0");
|
||||
return;
|
||||
}
|
||||
preamble[0] = cpu_to_le16(len);
|
||||
if (queue->mmio_base == B43_MMIO_PIO4_BASE)
|
||||
preamble_readwords = 14 / sizeof(u16);
|
||||
else
|
||||
preamble_readwords = 18 / sizeof(u16);
|
||||
for (i = 0; i < preamble_readwords; i++) {
|
||||
tmp = b43_pio_read(queue, B43_PIO_RXDATA);
|
||||
preamble[i + 1] = cpu_to_le16(tmp);
|
||||
}
|
||||
rxhdr = (struct b43_rxhdr_fw4 *)preamble;
|
||||
macstat = le32_to_cpu(rxhdr->mac_status);
|
||||
if (macstat & B43_RX_MAC_FCSERR) {
|
||||
pio_rx_error(queue,
|
||||
(queue->mmio_base == B43_MMIO_PIO1_BASE),
|
||||
"Frame FCS error");
|
||||
return;
|
||||
}
|
||||
if (queue->mmio_base == B43_MMIO_PIO4_BASE) {
|
||||
/* We received an xmit status. */
|
||||
struct b43_hwtxstatus *hw;
|
||||
|
||||
hw = (struct b43_hwtxstatus *)(preamble + 1);
|
||||
b43_handle_hwtxstatus(queue->dev, hw);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
skb = dev_alloc_skb(len);
|
||||
if (unlikely(!skb)) {
|
||||
pio_rx_error(queue, 1, "OOM");
|
||||
return;
|
||||
}
|
||||
skb_put(skb, len);
|
||||
for (i = 0; i < len - 1; i += 2) {
|
||||
tmp = b43_pio_read(queue, B43_PIO_RXDATA);
|
||||
*((__le16 *)(skb->data + i)) = cpu_to_le16(tmp);
|
||||
}
|
||||
if (len % 2) {
|
||||
tmp = b43_pio_read(queue, B43_PIO_RXDATA);
|
||||
skb->data[len - 1] = (tmp & 0x00FF);
|
||||
/* The specs say the following is required, but
|
||||
* it is wrong and corrupts the PLCP. If we don't do
|
||||
* this, the PLCP seems to be correct. So ifdef it out for now.
|
||||
*/
|
||||
#if 0
|
||||
if (rxflags2 & B43_RXHDR_FLAGS2_TYPE2FRAME)
|
||||
skb->data[2] = (tmp & 0xFF00) >> 8;
|
||||
else
|
||||
skb->data[0] = (tmp & 0xFF00) >> 8;
|
||||
#endif
|
||||
}
|
||||
b43_rx(queue->dev, skb, rxhdr);
|
||||
}
|
||||
|
||||
void b43_pio_tx_suspend(struct b43_pioqueue *queue)
|
||||
{
|
||||
b43_power_saving_ctl_bits(queue->dev, B43_PS_AWAKE);
|
||||
b43_pio_write(queue, B43_PIO_TXCTL, b43_pio_read(queue, B43_PIO_TXCTL)
|
||||
| B43_PIO_TXCTL_SUSPEND);
|
||||
}
|
||||
|
||||
void b43_pio_tx_resume(struct b43_pioqueue *queue)
|
||||
{
|
||||
b43_pio_write(queue, B43_PIO_TXCTL, b43_pio_read(queue, B43_PIO_TXCTL)
|
||||
& ~B43_PIO_TXCTL_SUSPEND);
|
||||
b43_power_saving_ctl_bits(queue->dev, 0);
|
||||
tasklet_schedule(&queue->txtask);
|
||||
}
|
||||
|
||||
void b43_pio_freeze_txqueues(struct b43_wldev *dev)
|
||||
{
|
||||
struct b43_pio *pio;
|
||||
|
||||
B43_WARN_ON(!b43_using_pio(dev));
|
||||
pio = &dev->pio;
|
||||
pio->queue0->tx_frozen = 1;
|
||||
pio->queue1->tx_frozen = 1;
|
||||
pio->queue2->tx_frozen = 1;
|
||||
pio->queue3->tx_frozen = 1;
|
||||
}
|
||||
|
||||
void b43_pio_thaw_txqueues(struct b43_wldev *dev)
|
||||
{
|
||||
struct b43_pio *pio;
|
||||
|
||||
B43_WARN_ON(!b43_using_pio(dev));
|
||||
pio = &dev->pio;
|
||||
pio->queue0->tx_frozen = 0;
|
||||
pio->queue1->tx_frozen = 0;
|
||||
pio->queue2->tx_frozen = 0;
|
||||
pio->queue3->tx_frozen = 0;
|
||||
if (!list_empty(&pio->queue0->txqueue))
|
||||
tasklet_schedule(&pio->queue0->txtask);
|
||||
if (!list_empty(&pio->queue1->txqueue))
|
||||
tasklet_schedule(&pio->queue1->txtask);
|
||||
if (!list_empty(&pio->queue2->txqueue))
|
||||
tasklet_schedule(&pio->queue2->txtask);
|
||||
if (!list_empty(&pio->queue3->txqueue))
|
||||
tasklet_schedule(&pio->queue3->txtask);
|
||||
}
|
||||
@ -1,153 +0,0 @@
|
||||
#ifndef B43_PIO_H_
|
||||
#define B43_PIO_H_
|
||||
|
||||
#include "b43.h"
|
||||
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/skbuff.h>
|
||||
|
||||
#define B43_PIO_TXCTL 0x00
|
||||
#define B43_PIO_TXDATA 0x02
|
||||
#define B43_PIO_TXQBUFSIZE 0x04
|
||||
#define B43_PIO_RXCTL 0x08
|
||||
#define B43_PIO_RXDATA 0x0A
|
||||
|
||||
#define B43_PIO_TXCTL_WRITELO (1 << 0)
|
||||
#define B43_PIO_TXCTL_WRITEHI (1 << 1)
|
||||
#define B43_PIO_TXCTL_COMPLETE (1 << 2)
|
||||
#define B43_PIO_TXCTL_INIT (1 << 3)
|
||||
#define B43_PIO_TXCTL_SUSPEND (1 << 7)
|
||||
|
||||
#define B43_PIO_RXCTL_DATAAVAILABLE (1 << 0)
|
||||
#define B43_PIO_RXCTL_READY (1 << 1)
|
||||
|
||||
/* PIO constants */
|
||||
#define B43_PIO_MAXTXDEVQPACKETS 31
|
||||
#define B43_PIO_TXQADJUST 80
|
||||
|
||||
/* PIO tuning knobs */
|
||||
#define B43_PIO_MAXTXPACKETS 256
|
||||
|
||||
#ifdef CONFIG_B43_PIO
|
||||
|
||||
struct b43_pioqueue;
|
||||
struct b43_xmitstatus;
|
||||
|
||||
struct b43_pio_txpacket {
|
||||
struct b43_pioqueue *queue;
|
||||
struct sk_buff *skb;
|
||||
struct ieee80211_tx_status txstat;
|
||||
struct list_head list;
|
||||
u16 index; /* Index in the tx_packets_cache */
|
||||
};
|
||||
|
||||
struct b43_pioqueue {
|
||||
struct b43_wldev *dev;
|
||||
u16 mmio_base;
|
||||
|
||||
bool tx_suspended;
|
||||
bool tx_frozen;
|
||||
bool need_workarounds; /* Workarounds needed for core.rev < 3 */
|
||||
|
||||
/* Adjusted size of the device internal TX buffer. */
|
||||
u16 tx_devq_size;
|
||||
/* Used octets of the device internal TX buffer. */
|
||||
u16 tx_devq_used;
|
||||
/* Used packet slots in the device internal TX buffer. */
|
||||
u8 tx_devq_packets;
|
||||
/* Packets from the txfree list can
|
||||
* be taken on incoming TX requests.
|
||||
*/
|
||||
struct list_head txfree;
|
||||
unsigned int nr_txfree;
|
||||
/* Packets on the txqueue are queued,
|
||||
* but not completely written to the chip, yet.
|
||||
*/
|
||||
struct list_head txqueue;
|
||||
/* Packets on the txrunning queue are completely
|
||||
* posted to the device. We are waiting for the txstatus.
|
||||
*/
|
||||
struct list_head txrunning;
|
||||
/* Total number or packets sent.
|
||||
* (This counter can obviously wrap).
|
||||
*/
|
||||
unsigned int nr_tx_packets;
|
||||
struct tasklet_struct txtask;
|
||||
struct b43_pio_txpacket tx_packets_cache[B43_PIO_MAXTXPACKETS];
|
||||
};
|
||||
|
||||
static inline u16 b43_pio_read(struct b43_pioqueue *queue, u16 offset)
|
||||
{
|
||||
return b43_read16(queue->dev, queue->mmio_base + offset);
|
||||
}
|
||||
|
||||
static inline
|
||||
void b43_pio_write(struct b43_pioqueue *queue, u16 offset, u16 value)
|
||||
{
|
||||
b43_write16(queue->dev, queue->mmio_base + offset, value);
|
||||
mmiowb();
|
||||
}
|
||||
|
||||
int b43_pio_init(struct b43_wldev *dev);
|
||||
void b43_pio_free(struct b43_wldev *dev);
|
||||
|
||||
int b43_pio_tx(struct b43_wldev *dev,
|
||||
struct sk_buff *skb, struct ieee80211_tx_control *ctl);
|
||||
void b43_pio_handle_txstatus(struct b43_wldev *dev,
|
||||
const struct b43_txstatus *status);
|
||||
void b43_pio_get_tx_stats(struct b43_wldev *dev,
|
||||
struct ieee80211_tx_queue_stats *stats);
|
||||
void b43_pio_rx(struct b43_pioqueue *queue);
|
||||
|
||||
/* Suspend TX queue in hardware. */
|
||||
void b43_pio_tx_suspend(struct b43_pioqueue *queue);
|
||||
void b43_pio_tx_resume(struct b43_pioqueue *queue);
|
||||
/* Suspend (freeze) the TX tasklet (software level). */
|
||||
void b43_pio_freeze_txqueues(struct b43_wldev *dev);
|
||||
void b43_pio_thaw_txqueues(struct b43_wldev *dev);
|
||||
|
||||
#else /* CONFIG_B43_PIO */
|
||||
|
||||
static inline int b43_pio_init(struct b43_wldev *dev)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
static inline void b43_pio_free(struct b43_wldev *dev)
|
||||
{
|
||||
}
|
||||
static inline
|
||||
int b43_pio_tx(struct b43_wldev *dev,
|
||||
struct sk_buff *skb, struct ieee80211_tx_control *ctl)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
static inline
|
||||
void b43_pio_handle_txstatus(struct b43_wldev *dev,
|
||||
const struct b43_txstatus *status)
|
||||
{
|
||||
}
|
||||
static inline
|
||||
void b43_pio_get_tx_stats(struct b43_wldev *dev,
|
||||
struct ieee80211_tx_queue_stats *stats)
|
||||
{
|
||||
}
|
||||
static inline void b43_pio_rx(struct b43_pioqueue *queue)
|
||||
{
|
||||
}
|
||||
static inline void b43_pio_tx_suspend(struct b43_pioqueue *queue)
|
||||
{
|
||||
}
|
||||
static inline void b43_pio_tx_resume(struct b43_pioqueue *queue)
|
||||
{
|
||||
}
|
||||
static inline void b43_pio_freeze_txqueues(struct b43_wldev *dev)
|
||||
{
|
||||
}
|
||||
static inline void b43_pio_thaw_txqueues(struct b43_wldev *dev)
|
||||
{
|
||||
}
|
||||
|
||||
#endif /* CONFIG_B43_PIO */
|
||||
#endif /* B43_PIO_H_ */
|
||||
Loading…
Reference in New Issue
Block a user