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https://gitee.com/bianbu-linux/linux-6.6
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dc39a78b3c
Add msi-x support to the alx driver. This is in preparation for multi queue support. msi-x interrupts are disabled by default because without multi queue support there is no advantage over msi interrupts. The performance numbers observed with iperf stay the same. Based on information of the downstream driver at github.com/qca/alx Signed-off-by: Tobias Regnery <tobias.regnery@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
/*
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* Copyright (c) 2013 Johannes Berg <johannes@sipsolutions.net>
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*
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* This file is free software: you may copy, redistribute and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 2 of the License, or (at your
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* option) any later version.
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*
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* This file is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* This file incorporates work covered by the following copyright and
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* permission notice:
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*
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* Copyright (c) 2012 Qualcomm Atheros, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef _ALX_H_
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#define _ALX_H_
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#include <linux/types.h>
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#include <linux/etherdevice.h>
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#include <linux/dma-mapping.h>
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#include <linux/spinlock.h>
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#include "hw.h"
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#define ALX_WATCHDOG_TIME (5 * HZ)
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struct alx_buffer {
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struct sk_buff *skb;
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DEFINE_DMA_UNMAP_ADDR(dma);
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DEFINE_DMA_UNMAP_LEN(size);
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};
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struct alx_rx_queue {
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struct alx_rrd *rrd;
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dma_addr_t rrd_dma;
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struct alx_rfd *rfd;
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dma_addr_t rfd_dma;
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struct alx_buffer *bufs;
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u16 write_idx, read_idx;
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u16 rrd_read_idx;
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};
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#define ALX_RX_ALLOC_THRESH 32
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struct alx_tx_queue {
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struct alx_txd *tpd;
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dma_addr_t tpd_dma;
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struct alx_buffer *bufs;
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u16 write_idx, read_idx;
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};
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#define ALX_DEFAULT_TX_WORK 128
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enum alx_device_quirks {
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ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG = BIT(0),
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};
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#define ALX_FLAG_USING_MSIX BIT(0)
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#define ALX_FLAG_USING_MSI BIT(1)
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struct alx_priv {
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struct net_device *dev;
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struct alx_hw hw;
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/* msi-x vectors */
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int num_vec;
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struct msix_entry *msix_entries;
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char irq_lbl[IFNAMSIZ + 8];
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/* all descriptor memory */
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struct {
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dma_addr_t dma;
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void *virt;
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unsigned int size;
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} descmem;
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/* protect int_mask updates */
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spinlock_t irq_lock;
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u32 int_mask;
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unsigned int tx_ringsz;
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unsigned int rx_ringsz;
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unsigned int rxbuf_size;
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struct napi_struct napi;
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struct alx_tx_queue txq;
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struct alx_rx_queue rxq;
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struct work_struct link_check_wk;
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struct work_struct reset_wk;
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u16 msg_enable;
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int flags;
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/* protects hw.stats */
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spinlock_t stats_lock;
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};
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extern const struct ethtool_ops alx_ethtool_ops;
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extern const char alx_drv_name[];
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#endif
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