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linux-pinenote/drivers/infiniband/hw/nes/nes.h
Maciej Sosnowski 5f61b2c693 RDMA/nes: Fix SFP+ link down detection issue with switch port disable 
In case of SFP+ PHY, link status check at interrupt processing can
give false results.  For proper link status change detection a delayed
recheck is needed to give nes registers time to settle.  Add a
periodic link status recheck scheduled at interrupt to detect
potential delayed registers state changes.

Addresses: http://bugs.openfabrics.org/bugzilla/show_bug.cgi?id=2117
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2011-01-16 13:23:34 -08:00

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/*
* Copyright (c) 2006 - 2009 Intel Corporation. All rights reserved.
* Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef __NES_H
#define __NES_H
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/spinlock.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/workqueue.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <linux/crc32c.h>
#include <rdma/ib_smi.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_pack.h>
#include <rdma/rdma_cm.h>
#include <rdma/iw_cm.h>
#define NES_SEND_FIRST_WRITE
#define QUEUE_DISCONNECTS
#define DRV_NAME "iw_nes"
#define DRV_VERSION "1.5.0.0"
#define PFX DRV_NAME ": "
/*
* NetEffect PCI vendor id and NE010 PCI device id.
*/
#ifndef PCI_VENDOR_ID_NETEFFECT /* not in pci.ids yet */
#define PCI_VENDOR_ID_NETEFFECT 0x1678
#define PCI_DEVICE_ID_NETEFFECT_NE020 0x0100
#define PCI_DEVICE_ID_NETEFFECT_NE020_KR 0x0110
#endif
#define NE020_REV 4
#define NE020_REV1 5
#define BAR_0 0
#define BAR_1 2
#define RX_BUF_SIZE (1536 + 8)
#define NES_REG0_SIZE (4 * 1024)
#define NES_TX_TIMEOUT (6*HZ)
#define NES_FIRST_QPN 64
#define NES_SW_CONTEXT_ALIGN 1024
#define NES_NIC_MAX_NICS 16
#define NES_MAX_ARP_TABLE_SIZE 4096
#define NES_NIC_CEQ_SIZE 8
/* NICs will be on a separate CQ */
#define NES_CCEQ_SIZE ((nesadapter->max_cq / nesadapter->port_count) - 32)
#define NES_MAX_PORT_COUNT 4
#define MAX_DPC_ITERATIONS 128
#define NES_DRV_OPT_ENABLE_MPA_VER_0 0x00000001
#define NES_DRV_OPT_DISABLE_MPA_CRC 0x00000002
#define NES_DRV_OPT_DISABLE_FIRST_WRITE 0x00000004
#define NES_DRV_OPT_DISABLE_INTF 0x00000008
#define NES_DRV_OPT_ENABLE_MSI 0x00000010
#define NES_DRV_OPT_DUAL_LOGICAL_PORT 0x00000020
#define NES_DRV_OPT_SUPRESS_OPTION_BC 0x00000040
#define NES_DRV_OPT_NO_INLINE_DATA 0x00000080
#define NES_DRV_OPT_DISABLE_INT_MOD 0x00000100
#define NES_DRV_OPT_DISABLE_VIRT_WQ 0x00000200
#define NES_AEQ_EVENT_TIMEOUT 2500
#define NES_DISCONNECT_EVENT_TIMEOUT 2000
/* debug levels */
/* must match userspace */
#define NES_DBG_HW 0x00000001
#define NES_DBG_INIT 0x00000002
#define NES_DBG_ISR 0x00000004
#define NES_DBG_PHY 0x00000008
#define NES_DBG_NETDEV 0x00000010
#define NES_DBG_CM 0x00000020
#define NES_DBG_CM1 0x00000040
#define NES_DBG_NIC_RX 0x00000080
#define NES_DBG_NIC_TX 0x00000100
#define NES_DBG_CQP 0x00000200
#define NES_DBG_MMAP 0x00000400
#define NES_DBG_MR 0x00000800
#define NES_DBG_PD 0x00001000
#define NES_DBG_CQ 0x00002000
#define NES_DBG_QP 0x00004000
#define NES_DBG_MOD_QP 0x00008000
#define NES_DBG_AEQ 0x00010000
#define NES_DBG_IW_RX 0x00020000
#define NES_DBG_IW_TX 0x00040000
#define NES_DBG_SHUTDOWN 0x00080000
#define NES_DBG_RSVD1 0x10000000
#define NES_DBG_RSVD2 0x20000000
#define NES_DBG_RSVD3 0x40000000
#define NES_DBG_RSVD4 0x80000000
#define NES_DBG_ALL 0xffffffff
#ifdef CONFIG_INFINIBAND_NES_DEBUG
#define nes_debug(level, fmt, args...) \
do { \
if (level & nes_debug_level) \
printk(KERN_ERR PFX "%s[%u]: " fmt, __func__, __LINE__, ##args); \
} while (0)
#define assert(expr) \
do { \
if (!(expr)) { \
printk(KERN_ERR PFX "Assertion failed! %s, %s, %s, line %d\n", \
#expr, __FILE__, __func__, __LINE__); \
} \
} while (0)
#define NES_EVENT_TIMEOUT 1200000
#else
#define nes_debug(level, fmt, args...)
#define assert(expr) do {} while (0)
#define NES_EVENT_TIMEOUT 100000
#endif
#include "nes_hw.h"
#include "nes_verbs.h"
#include "nes_context.h"
#include "nes_user.h"
#include "nes_cm.h"
extern int max_mtu;
#define max_frame_len (max_mtu+ETH_HLEN)
extern int interrupt_mod_interval;
extern int nes_if_count;
extern int mpa_version;
extern int disable_mpa_crc;
extern unsigned int send_first;
extern unsigned int nes_drv_opt;
extern unsigned int nes_debug_level;
extern unsigned int wqm_quanta;
extern struct list_head nes_adapter_list;
extern atomic_t cm_connects;
extern atomic_t cm_accepts;
extern atomic_t cm_disconnects;
extern atomic_t cm_closes;
extern atomic_t cm_connecteds;
extern atomic_t cm_connect_reqs;
extern atomic_t cm_rejects;
extern atomic_t mod_qp_timouts;
extern atomic_t qps_created;
extern atomic_t qps_destroyed;
extern atomic_t sw_qps_destroyed;
extern u32 mh_detected;
extern u32 mh_pauses_sent;
extern u32 cm_packets_sent;
extern u32 cm_packets_bounced;
extern u32 cm_packets_created;
extern u32 cm_packets_received;
extern u32 cm_packets_dropped;
extern u32 cm_packets_retrans;
extern atomic_t cm_listens_created;
extern atomic_t cm_listens_destroyed;
extern u32 cm_backlog_drops;
extern atomic_t cm_loopbacks;
extern atomic_t cm_nodes_created;
extern atomic_t cm_nodes_destroyed;
extern atomic_t cm_accel_dropped_pkts;
extern atomic_t cm_resets_recvd;
extern u32 int_mod_timer_init;
extern u32 int_mod_cq_depth_256;
extern u32 int_mod_cq_depth_128;
extern u32 int_mod_cq_depth_32;
extern u32 int_mod_cq_depth_24;
extern u32 int_mod_cq_depth_16;
extern u32 int_mod_cq_depth_4;
extern u32 int_mod_cq_depth_1;
struct nes_device {
struct nes_adapter *nesadapter;
void __iomem *regs;
void __iomem *index_reg;
struct pci_dev *pcidev;
struct net_device *netdev[NES_NIC_MAX_NICS];
u64 link_status_interrupts;
struct tasklet_struct dpc_tasklet;
spinlock_t indexed_regs_lock;
unsigned long csr_start;
unsigned long doorbell_region;
unsigned long doorbell_start;
unsigned long mac_tx_errors;
unsigned long mac_pause_frames_sent;
unsigned long mac_pause_frames_received;
unsigned long mac_rx_errors;
unsigned long mac_rx_crc_errors;
unsigned long mac_rx_symbol_err_frames;
unsigned long mac_rx_jabber_frames;
unsigned long mac_rx_oversized_frames;
unsigned long mac_rx_short_frames;
unsigned long port_rx_discards;
unsigned long port_tx_discards;
unsigned int mac_index;
unsigned int nes_stack_start;
/* Control Structures */
void *cqp_vbase;
dma_addr_t cqp_pbase;
u32 cqp_mem_size;
u8 ceq_index;
u8 nic_ceq_index;
struct nes_hw_cqp cqp;
struct nes_hw_cq ccq;
struct list_head cqp_avail_reqs;
struct list_head cqp_pending_reqs;
struct nes_cqp_request *nes_cqp_requests;
u32 int_req;
u32 int_stat;
u32 timer_int_req;
u32 timer_only_int_count;
u32 intf_int_req;
u32 last_mac_tx_pauses;
u32 last_used_chunks_tx;
struct list_head list;
u16 base_doorbell_index;
u16 currcq_count;
u16 deepcq_count;
u8 iw_status;
u8 msi_enabled;
u8 netdev_count;
u8 napi_isr_ran;
u8 disable_rx_flow_control;
u8 disable_tx_flow_control;
struct delayed_work work;
u8 link_recheck;
};
static inline __le32 get_crc_value(struct nes_v4_quad *nes_quad)
{
u32 crc_value;
crc_value = crc32c(~0, (void *)nes_quad, sizeof (struct nes_v4_quad));
/*
* With commit ef19454b ("[LIB] crc32c: Keep intermediate crc
* state in cpu order"), behavior of crc32c changes on
* big-endian platforms. Our algorithm expects the previous
* behavior; otherwise we have RDMA connection establishment
* issue on big-endian.
*/
return cpu_to_le32(crc_value);
}
static inline void
set_wqe_64bit_value(__le32 *wqe_words, u32 index, u64 value)
{
wqe_words[index] = cpu_to_le32((u32) value);
wqe_words[index + 1] = cpu_to_le32(upper_32_bits(value));
}
static inline void
set_wqe_32bit_value(__le32 *wqe_words, u32 index, u32 value)
{
wqe_words[index] = cpu_to_le32(value);
}
static inline void
nes_fill_init_cqp_wqe(struct nes_hw_cqp_wqe *cqp_wqe, struct nes_device *nesdev)
{
set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_COMP_CTX_LOW_IDX,
(u64)((unsigned long) &nesdev->cqp));
cqp_wqe->wqe_words[NES_CQP_WQE_COMP_SCRATCH_LOW_IDX] = 0;
cqp_wqe->wqe_words[NES_CQP_WQE_COMP_SCRATCH_HIGH_IDX] = 0;
cqp_wqe->wqe_words[NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX] = 0;
cqp_wqe->wqe_words[NES_CQP_STAG_WQE_PBL_LEN_IDX] = 0;
cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_LOW_IDX] = 0;
cqp_wqe->wqe_words[NES_CQP_STAG_WQE_PA_LOW_IDX] = 0;
cqp_wqe->wqe_words[NES_CQP_STAG_WQE_PA_HIGH_IDX] = 0;
}
static inline void
nes_fill_init_qp_wqe(struct nes_hw_qp_wqe *wqe, struct nes_qp *nesqp, u32 head)
{
u32 value;
value = ((u32)((unsigned long) nesqp)) | head;
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_HIGH_IDX,
(u32)(upper_32_bits((unsigned long)(nesqp))));
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, value);
}
/* Read from memory-mapped device */
static inline u32 nes_read_indexed(struct nes_device *nesdev, u32 reg_index)
{
unsigned long flags;
void __iomem *addr = nesdev->index_reg;
u32 value;
spin_lock_irqsave(&nesdev->indexed_regs_lock, flags);
writel(reg_index, addr);
value = readl((void __iomem *)addr + 4);
spin_unlock_irqrestore(&nesdev->indexed_regs_lock, flags);
return value;
}
static inline u32 nes_read32(const void __iomem *addr)
{
return readl(addr);
}
static inline u16 nes_read16(const void __iomem *addr)
{
return readw(addr);
}
static inline u8 nes_read8(const void __iomem *addr)
{
return readb(addr);
}
/* Write to memory-mapped device */
static inline void nes_write_indexed(struct nes_device *nesdev, u32 reg_index, u32 val)
{
unsigned long flags;
void __iomem *addr = nesdev->index_reg;
spin_lock_irqsave(&nesdev->indexed_regs_lock, flags);
writel(reg_index, addr);
writel(val, (void __iomem *)addr + 4);
spin_unlock_irqrestore(&nesdev->indexed_regs_lock, flags);
}
static inline void nes_write32(void __iomem *addr, u32 val)
{
writel(val, addr);
}
static inline void nes_write16(void __iomem *addr, u16 val)
{
writew(val, addr);
}
static inline void nes_write8(void __iomem *addr, u8 val)
{
writeb(val, addr);
}
static inline int nes_alloc_resource(struct nes_adapter *nesadapter,
unsigned long *resource_array, u32 max_resources,
u32 *req_resource_num, u32 *next)
{
unsigned long flags;
u32 resource_num;
spin_lock_irqsave(&nesadapter->resource_lock, flags);
resource_num = find_next_zero_bit(resource_array, max_resources, *next);
if (resource_num >= max_resources) {
resource_num = find_first_zero_bit(resource_array, max_resources);
if (resource_num >= max_resources) {
printk(KERN_ERR PFX "%s: No available resourcess.\n", __func__);
spin_unlock_irqrestore(&nesadapter->resource_lock, flags);
return -EMFILE;
}
}
set_bit(resource_num, resource_array);
*next = resource_num+1;
if (*next == max_resources) {
*next = 0;
}
spin_unlock_irqrestore(&nesadapter->resource_lock, flags);
*req_resource_num = resource_num;
return 0;
}
static inline int nes_is_resource_allocated(struct nes_adapter *nesadapter,
unsigned long *resource_array, u32 resource_num)
{
unsigned long flags;
int bit_is_set;
spin_lock_irqsave(&nesadapter->resource_lock, flags);
bit_is_set = test_bit(resource_num, resource_array);
nes_debug(NES_DBG_HW, "resource_num %u is%s allocated.\n",
resource_num, (bit_is_set ? "": " not"));
spin_unlock_irqrestore(&nesadapter->resource_lock, flags);
return bit_is_set;
}
static inline void nes_free_resource(struct nes_adapter *nesadapter,
unsigned long *resource_array, u32 resource_num)
{
unsigned long flags;
spin_lock_irqsave(&nesadapter->resource_lock, flags);
clear_bit(resource_num, resource_array);
spin_unlock_irqrestore(&nesadapter->resource_lock, flags);
}
static inline struct nes_vnic *to_nesvnic(struct ib_device *ibdev)
{
return container_of(ibdev, struct nes_ib_device, ibdev)->nesvnic;
}
static inline struct nes_pd *to_nespd(struct ib_pd *ibpd)
{
return container_of(ibpd, struct nes_pd, ibpd);
}
static inline struct nes_ucontext *to_nesucontext(struct ib_ucontext *ibucontext)
{
return container_of(ibucontext, struct nes_ucontext, ibucontext);
}
static inline struct nes_mr *to_nesmr(struct ib_mr *ibmr)
{
return container_of(ibmr, struct nes_mr, ibmr);
}
static inline struct nes_mr *to_nesmr_from_ibfmr(struct ib_fmr *ibfmr)
{
return container_of(ibfmr, struct nes_mr, ibfmr);
}
static inline struct nes_mr *to_nesmw(struct ib_mw *ibmw)
{
return container_of(ibmw, struct nes_mr, ibmw);
}
static inline struct nes_fmr *to_nesfmr(struct nes_mr *nesmr)
{
return container_of(nesmr, struct nes_fmr, nesmr);
}
static inline struct nes_cq *to_nescq(struct ib_cq *ibcq)
{
return container_of(ibcq, struct nes_cq, ibcq);
}
static inline struct nes_qp *to_nesqp(struct ib_qp *ibqp)
{
return container_of(ibqp, struct nes_qp, ibqp);
}
/* nes.c */
void nes_add_ref(struct ib_qp *);
void nes_rem_ref(struct ib_qp *);
struct ib_qp *nes_get_qp(struct ib_device *, int);
/* nes_hw.c */
struct nes_adapter *nes_init_adapter(struct nes_device *, u8);
void nes_nic_init_timer_defaults(struct nes_device *, u8);
void nes_destroy_adapter(struct nes_adapter *);
int nes_init_cqp(struct nes_device *);
int nes_init_phy(struct nes_device *);
int nes_init_nic_qp(struct nes_device *, struct net_device *);
void nes_destroy_nic_qp(struct nes_vnic *);
int nes_napi_isr(struct nes_device *);
void nes_dpc(unsigned long);
void nes_nic_ce_handler(struct nes_device *, struct nes_hw_nic_cq *);
void nes_iwarp_ce_handler(struct nes_device *, struct nes_hw_cq *);
int nes_destroy_cqp(struct nes_device *);
int nes_nic_cm_xmit(struct sk_buff *, struct net_device *);
void nes_recheck_link_status(struct work_struct *work);
/* nes_nic.c */
struct net_device *nes_netdev_init(struct nes_device *, void __iomem *);
void nes_netdev_destroy(struct net_device *);
int nes_nic_cm_xmit(struct sk_buff *, struct net_device *);
/* nes_cm.c */
void *nes_cm_create(struct net_device *);
int nes_cm_recv(struct sk_buff *, struct net_device *);
void nes_update_arp(unsigned char *, u32, u32, u16, u16);
void nes_manage_arp_cache(struct net_device *, unsigned char *, u32, u32);
void nes_sock_release(struct nes_qp *, unsigned long *);
void flush_wqes(struct nes_device *nesdev, struct nes_qp *, u32, u32);
int nes_manage_apbvt(struct nes_vnic *, u32, u32, u32);
int nes_cm_disconn(struct nes_qp *);
void nes_cm_disconn_worker(void *);
/* nes_verbs.c */
int nes_hw_modify_qp(struct nes_device *, struct nes_qp *, u32, u32, u32);
int nes_modify_qp(struct ib_qp *, struct ib_qp_attr *, int, struct ib_udata *);
struct nes_ib_device *nes_init_ofa_device(struct net_device *);
void nes_port_ibevent(struct nes_vnic *nesvnic);
void nes_destroy_ofa_device(struct nes_ib_device *);
int nes_register_ofa_device(struct nes_ib_device *);
/* nes_util.c */
int nes_read_eeprom_values(struct nes_device *, struct nes_adapter *);
void nes_write_1G_phy_reg(struct nes_device *, u8, u8, u16);
void nes_read_1G_phy_reg(struct nes_device *, u8, u8, u16 *);
void nes_write_10G_phy_reg(struct nes_device *, u16, u8, u16, u16);
void nes_read_10G_phy_reg(struct nes_device *, u8, u8, u16);
struct nes_cqp_request *nes_get_cqp_request(struct nes_device *);
void nes_free_cqp_request(struct nes_device *nesdev,
struct nes_cqp_request *cqp_request);
void nes_put_cqp_request(struct nes_device *nesdev,
struct nes_cqp_request *cqp_request);
void nes_post_cqp_request(struct nes_device *, struct nes_cqp_request *);
int nes_arp_table(struct nes_device *, u32, u8 *, u32);
void nes_mh_fix(unsigned long);
void nes_clc(unsigned long);
void nes_dump_mem(unsigned int, void *, int);
u32 nes_crc32(u32, u32, u32, u32, u8 *, u32, u32, u32);
#endif /* __NES_H */
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