Revision a84a79e4d369a73c0130b5858199e949432da4c6 authored by Linus Torvalds on 17 October 2011, 15:24:24 UTC, committed by Linus Torvalds on 17 October 2011, 15:24:24 UTC
The size is always valid, but variable-length arrays generate worse code for no good reason (unless the function happens to be inlined and the compiler sees the length for the simple constant it is). Also, there seems to be some code generation problem on POWER, where Henrik Bakken reports that register r28 can get corrupted under some subtle circumstances (interrupt happening at the wrong time?). That all indicates some seriously broken compiler issues, but since variable length arrays are bad regardless, there's little point in trying to chase it down. "Just don't do that, then". Reported-by: Henrik Grindal Bakken <henribak@cisco.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 8bc03e8
ps3_gelic_net.h
/*
* PS3 Platfom gelic network driver.
*
* Copyright (C) 2007 Sony Computer Entertainment Inc.
* Copyright 2006, 2007 Sony Corporation.
*
* This file is based on: spider_net.h
*
* (C) Copyright IBM Corp. 2005
*
* Authors : Utz Bacher <utz.bacher@de.ibm.com>
* Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _GELIC_NET_H
#define _GELIC_NET_H
/* descriptors */
#define GELIC_NET_RX_DESCRIPTORS 128 /* num of descriptors */
#define GELIC_NET_TX_DESCRIPTORS 128 /* num of descriptors */
#define GELIC_NET_MAX_MTU VLAN_ETH_FRAME_LEN
#define GELIC_NET_MIN_MTU VLAN_ETH_ZLEN
#define GELIC_NET_RXBUF_ALIGN 128
#define GELIC_CARD_RX_CSUM_DEFAULT 1 /* hw chksum */
#define GELIC_NET_WATCHDOG_TIMEOUT 5*HZ
#define GELIC_NET_NAPI_WEIGHT (GELIC_NET_RX_DESCRIPTORS)
#define GELIC_NET_BROADCAST_ADDR 0xffffffffffffL
#define GELIC_NET_MC_COUNT_MAX 32 /* multicast address list */
/* virtual interrupt status register bits */
/* INT1 */
#define GELIC_CARD_TX_RAM_FULL_ERR 0x0000000000000001L
#define GELIC_CARD_RX_RAM_FULL_ERR 0x0000000000000002L
#define GELIC_CARD_TX_SHORT_FRAME_ERR 0x0000000000000004L
#define GELIC_CARD_TX_INVALID_DESCR_ERR 0x0000000000000008L
#define GELIC_CARD_RX_FIFO_FULL_ERR 0x0000000000002000L
#define GELIC_CARD_RX_DESCR_CHAIN_END 0x0000000000004000L
#define GELIC_CARD_RX_INVALID_DESCR_ERR 0x0000000000008000L
#define GELIC_CARD_TX_RESPONCE_ERR 0x0000000000010000L
#define GELIC_CARD_RX_RESPONCE_ERR 0x0000000000100000L
#define GELIC_CARD_TX_PROTECTION_ERR 0x0000000000400000L
#define GELIC_CARD_RX_PROTECTION_ERR 0x0000000004000000L
#define GELIC_CARD_TX_TCP_UDP_CHECKSUM_ERR 0x0000000008000000L
#define GELIC_CARD_PORT_STATUS_CHANGED 0x0000000020000000L
#define GELIC_CARD_WLAN_EVENT_RECEIVED 0x0000000040000000L
#define GELIC_CARD_WLAN_COMMAND_COMPLETED 0x0000000080000000L
/* INT 0 */
#define GELIC_CARD_TX_FLAGGED_DESCR 0x0004000000000000L
#define GELIC_CARD_RX_FLAGGED_DESCR 0x0040000000000000L
#define GELIC_CARD_TX_TRANSFER_END 0x0080000000000000L
#define GELIC_CARD_TX_DESCR_CHAIN_END 0x0100000000000000L
#define GELIC_CARD_NUMBER_OF_RX_FRAME 0x1000000000000000L
#define GELIC_CARD_ONE_TIME_COUNT_TIMER 0x4000000000000000L
#define GELIC_CARD_FREE_RUN_COUNT_TIMER 0x8000000000000000L
/* initial interrupt mask */
#define GELIC_CARD_TXINT GELIC_CARD_TX_DESCR_CHAIN_END
#define GELIC_CARD_RXINT (GELIC_CARD_RX_DESCR_CHAIN_END | \
GELIC_CARD_NUMBER_OF_RX_FRAME)
/* RX descriptor data_status bits */
enum gelic_descr_rx_status {
GELIC_DESCR_RXDMADU = 0x80000000, /* destination MAC addr unknown */
GELIC_DESCR_RXLSTFBF = 0x40000000, /* last frame buffer */
GELIC_DESCR_RXIPCHK = 0x20000000, /* IP checksum performed */
GELIC_DESCR_RXTCPCHK = 0x10000000, /* TCP/UDP checksup performed */
GELIC_DESCR_RXWTPKT = 0x00C00000, /*
* wakeup trigger packet
* 01: Magic Packet (TM)
* 10: ARP packet
* 11: Multicast MAC addr
*/
GELIC_DESCR_RXVLNPKT = 0x00200000, /* VLAN packet */
/* bit 20..16 reserved */
GELIC_DESCR_RXRRECNUM = 0x0000ff00, /* reception receipt number */
/* bit 7..0 reserved */
};
#define GELIC_DESCR_DATA_STATUS_CHK_MASK \
(GELIC_DESCR_RXIPCHK | GELIC_DESCR_RXTCPCHK)
/* TX descriptor data_status bits */
enum gelic_descr_tx_status {
GELIC_DESCR_TX_TAIL = 0x00000001, /* gelic treated this
* descriptor was end of
* a tx frame
*/
};
/* RX descriptor data error bits */
enum gelic_descr_rx_error {
/* bit 31 reserved */
GELIC_DESCR_RXALNERR = 0x40000000, /* alignement error 10/100M */
GELIC_DESCR_RXOVERERR = 0x20000000, /* oversize error */
GELIC_DESCR_RXRNTERR = 0x10000000, /* Runt error */
GELIC_DESCR_RXIPCHKERR = 0x08000000, /* IP checksum error */
GELIC_DESCR_RXTCPCHKERR = 0x04000000, /* TCP/UDP checksum error */
GELIC_DESCR_RXDRPPKT = 0x00100000, /* drop packet */
GELIC_DESCR_RXIPFMTERR = 0x00080000, /* IP packet format error */
/* bit 18 reserved */
GELIC_DESCR_RXDATAERR = 0x00020000, /* IP packet format error */
GELIC_DESCR_RXCALERR = 0x00010000, /* cariier extension length
* error */
GELIC_DESCR_RXCREXERR = 0x00008000, /* carrier extension error */
GELIC_DESCR_RXMLTCST = 0x00004000, /* multicast address frame */
/* bit 13..0 reserved */
};
#define GELIC_DESCR_DATA_ERROR_CHK_MASK \
(GELIC_DESCR_RXIPCHKERR | GELIC_DESCR_RXTCPCHKERR)
/* DMA command and status (RX and TX)*/
enum gelic_descr_dma_status {
GELIC_DESCR_DMA_COMPLETE = 0x00000000, /* used in tx */
GELIC_DESCR_DMA_BUFFER_FULL = 0x00000000, /* used in rx */
GELIC_DESCR_DMA_RESPONSE_ERROR = 0x10000000, /* used in rx, tx */
GELIC_DESCR_DMA_PROTECTION_ERROR = 0x20000000, /* used in rx, tx */
GELIC_DESCR_DMA_FRAME_END = 0x40000000, /* used in rx */
GELIC_DESCR_DMA_FORCE_END = 0x50000000, /* used in rx, tx */
GELIC_DESCR_DMA_CARDOWNED = 0xa0000000, /* used in rx, tx */
GELIC_DESCR_DMA_NOT_IN_USE = 0xb0000000, /* any other value */
};
#define GELIC_DESCR_DMA_STAT_MASK (0xf0000000)
/* tx descriptor command and status */
enum gelic_descr_tx_dma_status {
/* [19] */
GELIC_DESCR_TX_DMA_IKE = 0x00080000, /* IPSEC off */
/* [18] */
GELIC_DESCR_TX_DMA_FRAME_TAIL = 0x00040000, /* last descriptor of
* the packet
*/
/* [17..16] */
GELIC_DESCR_TX_DMA_TCP_CHKSUM = 0x00020000, /* TCP packet */
GELIC_DESCR_TX_DMA_UDP_CHKSUM = 0x00030000, /* UDP packet */
GELIC_DESCR_TX_DMA_NO_CHKSUM = 0x00000000, /* no checksum */
/* [1] */
GELIC_DESCR_TX_DMA_CHAIN_END = 0x00000002, /* DMA terminated
* due to chain end
*/
};
#define GELIC_DESCR_DMA_CMD_NO_CHKSUM \
(GELIC_DESCR_DMA_CARDOWNED | GELIC_DESCR_TX_DMA_IKE | \
GELIC_DESCR_TX_DMA_NO_CHKSUM)
#define GELIC_DESCR_DMA_CMD_TCP_CHKSUM \
(GELIC_DESCR_DMA_CARDOWNED | GELIC_DESCR_TX_DMA_IKE | \
GELIC_DESCR_TX_DMA_TCP_CHKSUM)
#define GELIC_DESCR_DMA_CMD_UDP_CHKSUM \
(GELIC_DESCR_DMA_CARDOWNED | GELIC_DESCR_TX_DMA_IKE | \
GELIC_DESCR_TX_DMA_UDP_CHKSUM)
enum gelic_descr_rx_dma_status {
/* [ 1 ] */
GELIC_DESCR_RX_DMA_CHAIN_END = 0x00000002, /* DMA terminated
* due to chain end
*/
};
/* for lv1_net_control */
enum gelic_lv1_net_control_code {
GELIC_LV1_GET_MAC_ADDRESS = 1,
GELIC_LV1_GET_ETH_PORT_STATUS = 2,
GELIC_LV1_SET_NEGOTIATION_MODE = 3,
GELIC_LV1_GET_VLAN_ID = 4,
GELIC_LV1_SET_WOL = 5,
GELIC_LV1_GET_CHANNEL = 6,
GELIC_LV1_POST_WLAN_CMD = 9,
GELIC_LV1_GET_WLAN_CMD_RESULT = 10,
GELIC_LV1_GET_WLAN_EVENT = 11,
};
/* for GELIC_LV1_SET_WOL */
enum gelic_lv1_wol_command {
GELIC_LV1_WOL_MAGIC_PACKET = 1,
GELIC_LV1_WOL_ADD_MATCH_ADDR = 6,
GELIC_LV1_WOL_DELETE_MATCH_ADDR = 7,
};
/* for GELIC_LV1_WOL_MAGIC_PACKET */
enum gelic_lv1_wol_mp_arg {
GELIC_LV1_WOL_MP_DISABLE = 0,
GELIC_LV1_WOL_MP_ENABLE = 1,
};
/* for GELIC_LV1_WOL_{ADD,DELETE}_MATCH_ADDR */
enum gelic_lv1_wol_match_arg {
GELIC_LV1_WOL_MATCH_INDIVIDUAL = 0,
GELIC_LV1_WOL_MATCH_ALL = 1,
};
/* status returened from GET_ETH_PORT_STATUS */
enum gelic_lv1_ether_port_status {
GELIC_LV1_ETHER_LINK_UP = 0x0000000000000001L,
GELIC_LV1_ETHER_FULL_DUPLEX = 0x0000000000000002L,
GELIC_LV1_ETHER_AUTO_NEG = 0x0000000000000004L,
GELIC_LV1_ETHER_SPEED_10 = 0x0000000000000010L,
GELIC_LV1_ETHER_SPEED_100 = 0x0000000000000020L,
GELIC_LV1_ETHER_SPEED_1000 = 0x0000000000000040L,
GELIC_LV1_ETHER_SPEED_MASK = 0x0000000000000070L,
};
enum gelic_lv1_vlan_index {
/* for outgoing packets */
GELIC_LV1_VLAN_TX_ETHERNET_0 = 0x0000000000000002L,
GELIC_LV1_VLAN_TX_WIRELESS = 0x0000000000000003L,
/* for incoming packets */
GELIC_LV1_VLAN_RX_ETHERNET_0 = 0x0000000000000012L,
GELIC_LV1_VLAN_RX_WIRELESS = 0x0000000000000013L,
};
enum gelic_lv1_phy {
GELIC_LV1_PHY_ETHERNET_0 = 0x0000000000000002L,
};
/* size of hardware part of gelic descriptor */
#define GELIC_DESCR_SIZE (32)
enum gelic_port_type {
GELIC_PORT_ETHERNET_0 = 0,
GELIC_PORT_WIRELESS = 1,
GELIC_PORT_MAX
};
struct gelic_descr {
/* as defined by the hardware */
__be32 buf_addr;
__be32 buf_size;
__be32 next_descr_addr;
__be32 dmac_cmd_status;
__be32 result_size;
__be32 valid_size; /* all zeroes for tx */
__be32 data_status;
__be32 data_error; /* all zeroes for tx */
/* used in the driver */
struct sk_buff *skb;
dma_addr_t bus_addr;
struct gelic_descr *next;
struct gelic_descr *prev;
} __attribute__((aligned(32)));
struct gelic_descr_chain {
/* we walk from tail to head */
struct gelic_descr *head;
struct gelic_descr *tail;
};
struct gelic_vlan_id {
u16 tx;
u16 rx;
};
struct gelic_card {
struct napi_struct napi;
struct net_device *netdev[GELIC_PORT_MAX];
/*
* hypervisor requires irq_status should be
* 8 bytes aligned, but u64 member is
* always disposed in that manner
*/
u64 irq_status;
u64 irq_mask;
struct ps3_system_bus_device *dev;
struct gelic_vlan_id vlan[GELIC_PORT_MAX];
int vlan_required;
struct gelic_descr_chain tx_chain;
struct gelic_descr_chain rx_chain;
/*
* tx_lock guards tx descriptor list and
* tx_dma_progress.
*/
spinlock_t tx_lock;
int tx_dma_progress;
struct work_struct tx_timeout_task;
atomic_t tx_timeout_task_counter;
wait_queue_head_t waitq;
/* only first user should up the card */
struct mutex updown_lock;
atomic_t users;
u64 ether_port_status;
int link_mode;
/* original address returned by kzalloc */
void *unalign;
/*
* each netdevice has copy of irq
*/
unsigned int irq;
struct gelic_descr *tx_top, *rx_top;
struct gelic_descr descr[0]; /* must be the last */
};
struct gelic_port {
struct gelic_card *card;
struct net_device *netdev;
enum gelic_port_type type;
long priv[0]; /* long for alignment */
};
static inline struct gelic_card *port_to_card(struct gelic_port *p)
{
return p->card;
}
static inline struct net_device *port_to_netdev(struct gelic_port *p)
{
return p->netdev;
}
static inline struct gelic_card *netdev_card(struct net_device *d)
{
return ((struct gelic_port *)netdev_priv(d))->card;
}
static inline struct gelic_port *netdev_port(struct net_device *d)
{
return (struct gelic_port *)netdev_priv(d);
}
static inline struct device *ctodev(struct gelic_card *card)
{
return &card->dev->core;
}
static inline u64 bus_id(struct gelic_card *card)
{
return card->dev->bus_id;
}
static inline u64 dev_id(struct gelic_card *card)
{
return card->dev->dev_id;
}
static inline void *port_priv(struct gelic_port *port)
{
return port->priv;
}
extern int gelic_card_set_irq_mask(struct gelic_card *card, u64 mask);
/* shared netdev ops */
extern void gelic_card_up(struct gelic_card *card);
extern void gelic_card_down(struct gelic_card *card);
extern int gelic_net_open(struct net_device *netdev);
extern int gelic_net_stop(struct net_device *netdev);
extern int gelic_net_xmit(struct sk_buff *skb, struct net_device *netdev);
extern void gelic_net_set_multi(struct net_device *netdev);
extern void gelic_net_tx_timeout(struct net_device *netdev);
extern int gelic_net_change_mtu(struct net_device *netdev, int new_mtu);
extern int gelic_net_setup_netdev(struct net_device *netdev,
struct gelic_card *card);
/* shared ethtool ops */
extern void gelic_net_get_drvinfo(struct net_device *netdev,
struct ethtool_drvinfo *info);
extern void gelic_net_poll_controller(struct net_device *netdev);
#endif /* _GELIC_NET_H */
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