linux/drivers/net/ibmveth.h
Brian King 76b9cfccb3 ibmveth: Fix rx pool deactivate oops
This fixes the following oops which can occur when trying to deallocate
receive buffer pools using sysfs with the ibmveth driver.

NIP: d00000000024f954 LR: d00000000024fa58 CTR: c0000000000d7478
REGS: c00000000ffef9f0 TRAP: 0300   Not tainted  (2.6.22-ppc64)
MSR: 8000000000009032 <EE,ME,IR,DR>  CR: 24242442  XER: 00000010
DAR: 00000000000007f0, DSISR: 0000000042000000
TASK = c000000002f91360[2967] 'bash' THREAD: c00000001398c000 CPU: 2
GPR00: 0000000000000000 c00000000ffefc70 d000000000262d30 c00000001c4087a0
GPR04: 00000003000000fe 0000000000000000 000000000000000f c000000000579d80
GPR08: 0000000000365688 c00000001c408998 00000000000007f0 0000000000000000
GPR12: d000000000251e88 c000000000579d80 00000000200957ec 0000000000000000
GPR16: 00000000100b8808 00000000100feb30 0000000000000000 0000000010084828
GPR20: 0000000000000000 000000001014d4d0 0000000000000010 c00000000ffefeb0
GPR24: c00000001c408000 0000000000000000 c00000001c408000 00000000ffffb054
GPR28: 00000000000000fe 0000000000000003 d000000000262700 c00000001c4087a0
NIP [d00000000024f954] .ibmveth_remove_buffer_from_pool+0x38/0x108 [ibmveth]
LR [d00000000024fa58] .ibmveth_rxq_harvest_buffer+0x34/0x78 [ibmveth]
Call Trace:
[c00000000ffefc70] [c0000000000280a8] .dma_iommu_unmap_single+0x14/0x28 (unreliable)
[c00000000ffefd00] [d00000000024fa58] .ibmveth_rxq_harvest_buffer+0x34/0x78 [ibmveth]
[c00000000ffefd80] [d000000000250e40] .ibmveth_poll+0xd8/0x434 [ibmveth]
[c00000000ffefe40] [c00000000032da8c] .net_rx_action+0xdc/0x248
[c00000000ffefef0] [c000000000068b4c] .__do_softirq+0xa8/0x164
[c00000000ffeff90] [c00000000002789c] .call_do_softirq+0x14/0x24
[c00000001398f6f0] [c00000000000c04c] .do_softirq+0x68/0xac
[c00000001398f780] [c000000000068ca0] .irq_exit+0x54/0x6c
[c00000001398f800] [c00000000000c8e4] .do_IRQ+0x170/0x1ac
[c00000001398f890] [c000000000004790] hardware_interrupt_entry+0x18/0x1c
   Exception: 501 at .plpar_hcall_norets+0x24/0x94
    LR = .veth_pool_store+0x15c/0x298 [ibmveth]
[c00000001398fb80] [d000000000250b2c] .veth_pool_store+0x5c/0x298 [ibmveth] (unreliable)
[c00000001398fc30] [c000000000145530] .sysfs_write_file+0x140/0x1d8
[c00000001398fcf0] [c0000000000de89c] .vfs_write+0x120/0x208
[c00000001398fd90] [c0000000000df2c8] .sys_write+0x4c/0x8c
[c00000001398fe30] [c0000000000086ac] syscall_exit+0x0/0x40
Instruction dump:
fba1ffe8 fbe1fff8 789d0022 f8010010 f821ff71 789c0020 1d3d00a8 7b8a1f24
38000000 7c7f1b78 7d291a14 e9690128 <7c0a592a> e8030000 e9690120 80a90100

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-08-07 17:34:13 -04:00

164 lines
5.5 KiB
C

/**************************************************************************/
/* */
/* IBM eServer i/[Series Virtual Ethernet Device Driver */
/* Copyright (C) 2003 IBM Corp. */
/* Dave Larson (larson1@us.ibm.com) */
/* Santiago Leon (santil@us.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 of the License, or */
/* (at your option) any later version. */
/* */
/* This program is distributed in the hope that it will be useful, */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
/* GNU General Public License for more details. */
/* */
/* You should have received a copy of the GNU General Public License */
/* along with this program; if not, write to the Free Software */
/* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 */
/* USA */
/* */
/**************************************************************************/
#ifndef _IBMVETH_H
#define _IBMVETH_H
#define IbmVethMaxSendFrags 6
/* constants for H_MULTICAST_CTRL */
#define IbmVethMcastReceptionModifyBit 0x80000UL
#define IbmVethMcastReceptionEnableBit 0x20000UL
#define IbmVethMcastFilterModifyBit 0x40000UL
#define IbmVethMcastFilterEnableBit 0x10000UL
#define IbmVethMcastEnableRecv (IbmVethMcastReceptionModifyBit | IbmVethMcastReceptionEnableBit)
#define IbmVethMcastDisableRecv (IbmVethMcastReceptionModifyBit)
#define IbmVethMcastEnableFiltering (IbmVethMcastFilterModifyBit | IbmVethMcastFilterEnableBit)
#define IbmVethMcastDisableFiltering (IbmVethMcastFilterModifyBit)
#define IbmVethMcastAddFilter 0x1UL
#define IbmVethMcastRemoveFilter 0x2UL
#define IbmVethMcastClearFilterTable 0x3UL
/* hcall macros */
#define h_register_logical_lan(ua, buflst, rxq, fltlst, mac) \
plpar_hcall_norets(H_REGISTER_LOGICAL_LAN, ua, buflst, rxq, fltlst, mac)
#define h_free_logical_lan(ua) \
plpar_hcall_norets(H_FREE_LOGICAL_LAN, ua)
#define h_add_logical_lan_buffer(ua, buf) \
plpar_hcall_norets(H_ADD_LOGICAL_LAN_BUFFER, ua, buf)
static inline long h_send_logical_lan(unsigned long unit_address,
unsigned long desc1, unsigned long desc2, unsigned long desc3,
unsigned long desc4, unsigned long desc5, unsigned long desc6,
unsigned long corellator_in, unsigned long *corellator_out)
{
long rc;
unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
rc = plpar_hcall9(H_SEND_LOGICAL_LAN, retbuf, unit_address, desc1,
desc2, desc3, desc4, desc5, desc6, corellator_in);
*corellator_out = retbuf[0];
return rc;
}
#define h_multicast_ctrl(ua, cmd, mac) \
plpar_hcall_norets(H_MULTICAST_CTRL, ua, cmd, mac)
#define h_change_logical_lan_mac(ua, mac) \
plpar_hcall_norets(H_CHANGE_LOGICAL_LAN_MAC, ua, mac)
#define IbmVethNumBufferPools 5
#define IBMVETH_BUFF_OH 22 /* Overhead: 14 ethernet header + 8 opaque handle */
#define IBMVETH_MAX_MTU 68
#define IBMVETH_MAX_POOL_COUNT 4096
#define IBMVETH_MAX_BUF_SIZE (1024 * 128)
static int pool_size[] = { 512, 1024 * 2, 1024 * 16, 1024 * 32, 1024 * 64 };
static int pool_count[] = { 256, 768, 256, 256, 256 };
static int pool_active[] = { 1, 1, 0, 0, 0};
#define IBM_VETH_INVALID_MAP ((u16)0xffff)
struct ibmveth_buff_pool {
u32 size;
u32 index;
u32 buff_size;
u32 threshold;
atomic_t available;
u32 consumer_index;
u32 producer_index;
u16 *free_map;
dma_addr_t *dma_addr;
struct sk_buff **skbuff;
int active;
struct kobject kobj;
};
struct ibmveth_rx_q {
u64 index;
u64 num_slots;
u64 toggle;
dma_addr_t queue_dma;
u32 queue_len;
struct ibmveth_rx_q_entry *queue_addr;
};
struct ibmveth_adapter {
struct vio_dev *vdev;
struct net_device *netdev;
struct net_device_stats stats;
unsigned int mcastFilterSize;
unsigned long mac_addr;
void * buffer_list_addr;
void * filter_list_addr;
dma_addr_t buffer_list_dma;
dma_addr_t filter_list_dma;
struct ibmveth_buff_pool rx_buff_pool[IbmVethNumBufferPools];
struct ibmveth_rx_q rx_queue;
int pool_config;
/* adapter specific stats */
u64 replenish_task_cycles;
u64 replenish_no_mem;
u64 replenish_add_buff_failure;
u64 replenish_add_buff_success;
u64 rx_invalid_buffer;
u64 rx_no_buffer;
u64 tx_multidesc_send;
u64 tx_linearized;
u64 tx_linearize_failed;
u64 tx_map_failed;
u64 tx_send_failed;
spinlock_t stats_lock;
};
struct ibmveth_buf_desc_fields {
u32 valid : 1;
u32 toggle : 1;
u32 reserved : 6;
u32 length : 24;
u32 address;
};
union ibmveth_buf_desc {
u64 desc;
struct ibmveth_buf_desc_fields fields;
};
struct ibmveth_rx_q_entry {
u16 toggle : 1;
u16 valid : 1;
u16 reserved : 14;
u16 offset;
u32 length;
u64 correlator;
};
#endif /* _IBMVETH_H */