mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-15 15:04:27 +08:00
be839e3917
Add main T4 PCI-E SR-IOV Virtual Function driver for "cxgb4vf". Signed-off-by: Casey Leedom Signed-off-by: David S. Miller <davem@davemloft.net>
541 lines
16 KiB
C
541 lines
16 KiB
C
/*
|
|
* This file is part of the Chelsio T4 PCI-E SR-IOV Virtual Function Ethernet
|
|
* driver for Linux.
|
|
*
|
|
* Copyright (c) 2009-2010 Chelsio Communications, 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.
|
|
*/
|
|
|
|
/*
|
|
* This file should not be included directly. Include t4vf_common.h instead.
|
|
*/
|
|
|
|
#ifndef __CXGB4VF_ADAPTER_H__
|
|
#define __CXGB4VF_ADAPTER_H__
|
|
|
|
#include <linux/pci.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/if_ether.h>
|
|
#include <linux/netdevice.h>
|
|
|
|
#include "../cxgb4/t4_hw.h"
|
|
|
|
/*
|
|
* Constants of the implementation.
|
|
*/
|
|
enum {
|
|
MAX_NPORTS = 1, /* max # of "ports" */
|
|
MAX_PORT_QSETS = 8, /* max # of Queue Sets / "port" */
|
|
MAX_ETH_QSETS = MAX_NPORTS*MAX_PORT_QSETS,
|
|
|
|
/*
|
|
* MSI-X interrupt index usage.
|
|
*/
|
|
MSIX_FW = 0, /* MSI-X index for firmware Q */
|
|
MSIX_NIQFLINT = 1, /* MSI-X index base for Ingress Qs */
|
|
MSIX_EXTRAS = 1,
|
|
MSIX_ENTRIES = MAX_ETH_QSETS + MSIX_EXTRAS,
|
|
|
|
/*
|
|
* The maximum number of Ingress and Egress Queues is determined by
|
|
* the maximum number of "Queue Sets" which we support plus any
|
|
* ancillary queues. Each "Queue Set" requires one Ingress Queue
|
|
* for RX Packet Ingress Event notifications and two Egress Queues for
|
|
* a Free List and an Ethernet TX list.
|
|
*/
|
|
INGQ_EXTRAS = 2, /* firmware event queue and */
|
|
/* forwarded interrupts */
|
|
MAX_INGQ = MAX_ETH_QSETS+INGQ_EXTRAS,
|
|
MAX_EGRQ = MAX_ETH_QSETS*2,
|
|
};
|
|
|
|
/*
|
|
* Forward structure definition references.
|
|
*/
|
|
struct adapter;
|
|
struct sge_eth_rxq;
|
|
struct sge_rspq;
|
|
|
|
/*
|
|
* Per-"port" information. This is really per-Virtual Interface information
|
|
* but the use of the "port" nomanclature makes it easier to go back and forth
|
|
* between the PF and VF drivers ...
|
|
*/
|
|
struct port_info {
|
|
struct adapter *adapter; /* our adapter */
|
|
struct vlan_group *vlan_grp; /* out VLAN group */
|
|
u16 viid; /* virtual interface ID */
|
|
s16 xact_addr_filt; /* index of our MAC address filter */
|
|
u16 rss_size; /* size of VI's RSS table slice */
|
|
u8 pidx; /* index into adapter port[] */
|
|
u8 port_id; /* physical port ID */
|
|
u8 rx_offload; /* CSO, etc. */
|
|
u8 nqsets; /* # of "Queue Sets" */
|
|
u8 first_qset; /* index of first "Queue Set" */
|
|
struct link_config link_cfg; /* physical port configuration */
|
|
};
|
|
|
|
/* port_info.rx_offload flags */
|
|
enum {
|
|
RX_CSO = 1 << 0,
|
|
};
|
|
|
|
/*
|
|
* Scatter Gather Engine resources for the "adapter". Our ingress and egress
|
|
* queues are organized into "Queue Sets" with one ingress and one egress
|
|
* queue per Queue Set. These Queue Sets are aportionable between the "ports"
|
|
* (Virtual Interfaces). One extra ingress queue is used to receive
|
|
* asynchronous messages from the firmware. Note that the "Queue IDs" that we
|
|
* use here are really "Relative Queue IDs" which are returned as part of the
|
|
* firmware command to allocate queues. These queue IDs are relative to the
|
|
* absolute Queue ID base of the section of the Queue ID space allocated to
|
|
* the PF/VF.
|
|
*/
|
|
|
|
/*
|
|
* SGE free-list queue state.
|
|
*/
|
|
struct rx_sw_desc;
|
|
struct sge_fl {
|
|
unsigned int avail; /* # of available RX buffers */
|
|
unsigned int pend_cred; /* new buffers since last FL DB ring */
|
|
unsigned int cidx; /* consumer index */
|
|
unsigned int pidx; /* producer index */
|
|
unsigned long alloc_failed; /* # of buffer allocation failures */
|
|
unsigned long large_alloc_failed;
|
|
unsigned long starving; /* # of times FL was found starving */
|
|
|
|
/*
|
|
* Write-once/infrequently fields.
|
|
* -------------------------------
|
|
*/
|
|
|
|
unsigned int cntxt_id; /* SGE relative QID for the free list */
|
|
unsigned int abs_id; /* SGE absolute QID for the free list */
|
|
unsigned int size; /* capacity of free list */
|
|
struct rx_sw_desc *sdesc; /* address of SW RX descriptor ring */
|
|
__be64 *desc; /* address of HW RX descriptor ring */
|
|
dma_addr_t addr; /* PCI bus address of hardware ring */
|
|
};
|
|
|
|
/*
|
|
* An ingress packet gather list.
|
|
*/
|
|
struct pkt_gl {
|
|
skb_frag_t frags[MAX_SKB_FRAGS];
|
|
void *va; /* virtual address of first byte */
|
|
unsigned int nfrags; /* # of fragments */
|
|
unsigned int tot_len; /* total length of fragments */
|
|
};
|
|
|
|
typedef int (*rspq_handler_t)(struct sge_rspq *, const __be64 *,
|
|
const struct pkt_gl *);
|
|
|
|
/*
|
|
* State for an SGE Response Queue.
|
|
*/
|
|
struct sge_rspq {
|
|
struct napi_struct napi; /* NAPI scheduling control */
|
|
const __be64 *cur_desc; /* current descriptor in queue */
|
|
unsigned int cidx; /* consumer index */
|
|
u8 gen; /* current generation bit */
|
|
u8 next_intr_params; /* holdoff params for next interrupt */
|
|
int offset; /* offset into current FL buffer */
|
|
|
|
unsigned int unhandled_irqs; /* bogus interrupts */
|
|
|
|
/*
|
|
* Write-once/infrequently fields.
|
|
* -------------------------------
|
|
*/
|
|
|
|
u8 intr_params; /* interrupt holdoff parameters */
|
|
u8 pktcnt_idx; /* interrupt packet threshold */
|
|
u8 idx; /* queue index within its group */
|
|
u16 cntxt_id; /* SGE rel QID for the response Q */
|
|
u16 abs_id; /* SGE abs QID for the response Q */
|
|
__be64 *desc; /* address of hardware response ring */
|
|
dma_addr_t phys_addr; /* PCI bus address of ring */
|
|
unsigned int iqe_len; /* entry size */
|
|
unsigned int size; /* capcity of response Q */
|
|
struct adapter *adapter; /* our adapter */
|
|
struct net_device *netdev; /* associated net device */
|
|
rspq_handler_t handler; /* the handler for this response Q */
|
|
};
|
|
|
|
/*
|
|
* Ethernet queue statistics
|
|
*/
|
|
struct sge_eth_stats {
|
|
unsigned long pkts; /* # of ethernet packets */
|
|
unsigned long lro_pkts; /* # of LRO super packets */
|
|
unsigned long lro_merged; /* # of wire packets merged by LRO */
|
|
unsigned long rx_cso; /* # of Rx checksum offloads */
|
|
unsigned long vlan_ex; /* # of Rx VLAN extractions */
|
|
unsigned long rx_drops; /* # of packets dropped due to no mem */
|
|
};
|
|
|
|
/*
|
|
* State for an Ethernet Receive Queue.
|
|
*/
|
|
struct sge_eth_rxq {
|
|
struct sge_rspq rspq; /* Response Queue */
|
|
struct sge_fl fl; /* Free List */
|
|
struct sge_eth_stats stats; /* receive statistics */
|
|
};
|
|
|
|
/*
|
|
* SGE Transmit Queue state. This contains all of the resources associated
|
|
* with the hardware status of a TX Queue which is a circular ring of hardware
|
|
* TX Descriptors. For convenience, it also contains a pointer to a parallel
|
|
* "Software Descriptor" array but we don't know anything about it here other
|
|
* than its type name.
|
|
*/
|
|
struct tx_desc {
|
|
/*
|
|
* Egress Queues are measured in units of SGE_EQ_IDXSIZE by the
|
|
* hardware: Sizes, Producer and Consumer indices, etc.
|
|
*/
|
|
__be64 flit[SGE_EQ_IDXSIZE/sizeof(__be64)];
|
|
};
|
|
struct tx_sw_desc;
|
|
struct sge_txq {
|
|
unsigned int in_use; /* # of in-use TX descriptors */
|
|
unsigned int size; /* # of descriptors */
|
|
unsigned int cidx; /* SW consumer index */
|
|
unsigned int pidx; /* producer index */
|
|
unsigned long stops; /* # of times queue has been stopped */
|
|
unsigned long restarts; /* # of queue restarts */
|
|
|
|
/*
|
|
* Write-once/infrequently fields.
|
|
* -------------------------------
|
|
*/
|
|
|
|
unsigned int cntxt_id; /* SGE relative QID for the TX Q */
|
|
unsigned int abs_id; /* SGE absolute QID for the TX Q */
|
|
struct tx_desc *desc; /* address of HW TX descriptor ring */
|
|
struct tx_sw_desc *sdesc; /* address of SW TX descriptor ring */
|
|
struct sge_qstat *stat; /* queue status entry */
|
|
dma_addr_t phys_addr; /* PCI bus address of hardware ring */
|
|
};
|
|
|
|
/*
|
|
* State for an Ethernet Transmit Queue.
|
|
*/
|
|
struct sge_eth_txq {
|
|
struct sge_txq q; /* SGE TX Queue */
|
|
struct netdev_queue *txq; /* associated netdev TX queue */
|
|
unsigned long tso; /* # of TSO requests */
|
|
unsigned long tx_cso; /* # of TX checksum offloads */
|
|
unsigned long vlan_ins; /* # of TX VLAN insertions */
|
|
unsigned long mapping_err; /* # of I/O MMU packet mapping errors */
|
|
};
|
|
|
|
/*
|
|
* The complete set of Scatter/Gather Engine resources.
|
|
*/
|
|
struct sge {
|
|
/*
|
|
* Our "Queue Sets" ...
|
|
*/
|
|
struct sge_eth_txq ethtxq[MAX_ETH_QSETS];
|
|
struct sge_eth_rxq ethrxq[MAX_ETH_QSETS];
|
|
|
|
/*
|
|
* Extra ingress queues for asynchronous firmware events and
|
|
* forwarded interrupts (when in MSI mode).
|
|
*/
|
|
struct sge_rspq fw_evtq ____cacheline_aligned_in_smp;
|
|
|
|
struct sge_rspq intrq ____cacheline_aligned_in_smp;
|
|
spinlock_t intrq_lock;
|
|
|
|
/*
|
|
* State for managing "starving Free Lists" -- Free Lists which have
|
|
* fallen below a certain threshold of buffers available to the
|
|
* hardware and attempts to refill them up to that threshold have
|
|
* failed. We have a regular "slow tick" timer process which will
|
|
* make periodic attempts to refill these starving Free Lists ...
|
|
*/
|
|
DECLARE_BITMAP(starving_fl, MAX_EGRQ);
|
|
struct timer_list rx_timer;
|
|
|
|
/*
|
|
* State for cleaning up completed TX descriptors.
|
|
*/
|
|
struct timer_list tx_timer;
|
|
|
|
/*
|
|
* Write-once/infrequently fields.
|
|
* -------------------------------
|
|
*/
|
|
|
|
u16 max_ethqsets; /* # of available Ethernet queue sets */
|
|
u16 ethqsets; /* # of active Ethernet queue sets */
|
|
u16 ethtxq_rover; /* Tx queue to clean up next */
|
|
u16 timer_val[SGE_NTIMERS]; /* interrupt holdoff timer array */
|
|
u8 counter_val[SGE_NCOUNTERS]; /* interrupt RX threshold array */
|
|
|
|
/*
|
|
* Reverse maps from Absolute Queue IDs to associated queue pointers.
|
|
* The absolute Queue IDs are in a compact range which start at a
|
|
* [potentially large] Base Queue ID. We perform the reverse map by
|
|
* first converting the Absolute Queue ID into a Relative Queue ID by
|
|
* subtracting off the Base Queue ID and then use a Relative Queue ID
|
|
* indexed table to get the pointer to the corresponding software
|
|
* queue structure.
|
|
*/
|
|
unsigned int egr_base;
|
|
unsigned int ingr_base;
|
|
void *egr_map[MAX_EGRQ];
|
|
struct sge_rspq *ingr_map[MAX_INGQ];
|
|
};
|
|
|
|
/*
|
|
* Utility macros to convert Absolute- to Relative-Queue indices and Egress-
|
|
* and Ingress-Queues. The EQ_MAP() and IQ_MAP() macros which provide
|
|
* pointers to Ingress- and Egress-Queues can be used as both L- and R-values
|
|
*/
|
|
#define EQ_IDX(s, abs_id) ((unsigned int)((abs_id) - (s)->egr_base))
|
|
#define IQ_IDX(s, abs_id) ((unsigned int)((abs_id) - (s)->ingr_base))
|
|
|
|
#define EQ_MAP(s, abs_id) ((s)->egr_map[EQ_IDX(s, abs_id)])
|
|
#define IQ_MAP(s, abs_id) ((s)->ingr_map[IQ_IDX(s, abs_id)])
|
|
|
|
/*
|
|
* Macro to iterate across Queue Sets ("rxq" is a historic misnomer).
|
|
*/
|
|
#define for_each_ethrxq(sge, iter) \
|
|
for (iter = 0; iter < (sge)->ethqsets; iter++)
|
|
|
|
/*
|
|
* Per-"adapter" (Virtual Function) information.
|
|
*/
|
|
struct adapter {
|
|
/* PCI resources */
|
|
void __iomem *regs;
|
|
struct pci_dev *pdev;
|
|
struct device *pdev_dev;
|
|
|
|
/* "adapter" resources */
|
|
unsigned long registered_device_map;
|
|
unsigned long open_device_map;
|
|
unsigned long flags;
|
|
struct adapter_params params;
|
|
|
|
/* queue and interrupt resources */
|
|
struct {
|
|
unsigned short vec;
|
|
char desc[22];
|
|
} msix_info[MSIX_ENTRIES];
|
|
struct sge sge;
|
|
|
|
/* Linux network device resources */
|
|
struct net_device *port[MAX_NPORTS];
|
|
const char *name;
|
|
unsigned int msg_enable;
|
|
|
|
/* debugfs resources */
|
|
struct dentry *debugfs_root;
|
|
|
|
/* various locks */
|
|
spinlock_t stats_lock;
|
|
};
|
|
|
|
enum { /* adapter flags */
|
|
FULL_INIT_DONE = (1UL << 0),
|
|
USING_MSI = (1UL << 1),
|
|
USING_MSIX = (1UL << 2),
|
|
QUEUES_BOUND = (1UL << 3),
|
|
};
|
|
|
|
/*
|
|
* The following register read/write routine definitions are required by
|
|
* the common code.
|
|
*/
|
|
|
|
/**
|
|
* t4_read_reg - read a HW register
|
|
* @adapter: the adapter
|
|
* @reg_addr: the register address
|
|
*
|
|
* Returns the 32-bit value of the given HW register.
|
|
*/
|
|
static inline u32 t4_read_reg(struct adapter *adapter, u32 reg_addr)
|
|
{
|
|
return readl(adapter->regs + reg_addr);
|
|
}
|
|
|
|
/**
|
|
* t4_write_reg - write a HW register
|
|
* @adapter: the adapter
|
|
* @reg_addr: the register address
|
|
* @val: the value to write
|
|
*
|
|
* Write a 32-bit value into the given HW register.
|
|
*/
|
|
static inline void t4_write_reg(struct adapter *adapter, u32 reg_addr, u32 val)
|
|
{
|
|
writel(val, adapter->regs + reg_addr);
|
|
}
|
|
|
|
#ifndef readq
|
|
static inline u64 readq(const volatile void __iomem *addr)
|
|
{
|
|
return readl(addr) + ((u64)readl(addr + 4) << 32);
|
|
}
|
|
|
|
static inline void writeq(u64 val, volatile void __iomem *addr)
|
|
{
|
|
writel(val, addr);
|
|
writel(val >> 32, addr + 4);
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* t4_read_reg64 - read a 64-bit HW register
|
|
* @adapter: the adapter
|
|
* @reg_addr: the register address
|
|
*
|
|
* Returns the 64-bit value of the given HW register.
|
|
*/
|
|
static inline u64 t4_read_reg64(struct adapter *adapter, u32 reg_addr)
|
|
{
|
|
return readq(adapter->regs + reg_addr);
|
|
}
|
|
|
|
/**
|
|
* t4_write_reg64 - write a 64-bit HW register
|
|
* @adapter: the adapter
|
|
* @reg_addr: the register address
|
|
* @val: the value to write
|
|
*
|
|
* Write a 64-bit value into the given HW register.
|
|
*/
|
|
static inline void t4_write_reg64(struct adapter *adapter, u32 reg_addr,
|
|
u64 val)
|
|
{
|
|
writeq(val, adapter->regs + reg_addr);
|
|
}
|
|
|
|
/**
|
|
* port_name - return the string name of a port
|
|
* @adapter: the adapter
|
|
* @pidx: the port index
|
|
*
|
|
* Return the string name of the selected port.
|
|
*/
|
|
static inline const char *port_name(struct adapter *adapter, int pidx)
|
|
{
|
|
return adapter->port[pidx]->name;
|
|
}
|
|
|
|
/**
|
|
* t4_os_set_hw_addr - store a port's MAC address in SW
|
|
* @adapter: the adapter
|
|
* @pidx: the port index
|
|
* @hw_addr: the Ethernet address
|
|
*
|
|
* Store the Ethernet address of the given port in SW. Called by the common
|
|
* code when it retrieves a port's Ethernet address from EEPROM.
|
|
*/
|
|
static inline void t4_os_set_hw_addr(struct adapter *adapter, int pidx,
|
|
u8 hw_addr[])
|
|
{
|
|
memcpy(adapter->port[pidx]->dev_addr, hw_addr, ETH_ALEN);
|
|
memcpy(adapter->port[pidx]->perm_addr, hw_addr, ETH_ALEN);
|
|
}
|
|
|
|
/**
|
|
* netdev2pinfo - return the port_info structure associated with a net_device
|
|
* @dev: the netdev
|
|
*
|
|
* Return the struct port_info associated with a net_device
|
|
*/
|
|
static inline struct port_info *netdev2pinfo(const struct net_device *dev)
|
|
{
|
|
return netdev_priv(dev);
|
|
}
|
|
|
|
/**
|
|
* adap2pinfo - return the port_info of a port
|
|
* @adap: the adapter
|
|
* @pidx: the port index
|
|
*
|
|
* Return the port_info structure for the adapter.
|
|
*/
|
|
static inline struct port_info *adap2pinfo(struct adapter *adapter, int pidx)
|
|
{
|
|
return netdev_priv(adapter->port[pidx]);
|
|
}
|
|
|
|
/**
|
|
* netdev2adap - return the adapter structure associated with a net_device
|
|
* @dev: the netdev
|
|
*
|
|
* Return the struct adapter associated with a net_device
|
|
*/
|
|
static inline struct adapter *netdev2adap(const struct net_device *dev)
|
|
{
|
|
return netdev2pinfo(dev)->adapter;
|
|
}
|
|
|
|
/*
|
|
* OS "Callback" function declarations. These are functions that the OS code
|
|
* is "contracted" to provide for the common code.
|
|
*/
|
|
void t4vf_os_link_changed(struct adapter *, int, int);
|
|
|
|
/*
|
|
* SGE function prototype declarations.
|
|
*/
|
|
int t4vf_sge_alloc_rxq(struct adapter *, struct sge_rspq *, bool,
|
|
struct net_device *, int,
|
|
struct sge_fl *, rspq_handler_t);
|
|
int t4vf_sge_alloc_eth_txq(struct adapter *, struct sge_eth_txq *,
|
|
struct net_device *, struct netdev_queue *,
|
|
unsigned int);
|
|
void t4vf_free_sge_resources(struct adapter *);
|
|
|
|
int t4vf_eth_xmit(struct sk_buff *, struct net_device *);
|
|
int t4vf_ethrx_handler(struct sge_rspq *, const __be64 *,
|
|
const struct pkt_gl *);
|
|
|
|
irq_handler_t t4vf_intr_handler(struct adapter *);
|
|
irqreturn_t t4vf_sge_intr_msix(int, void *);
|
|
|
|
int t4vf_sge_init(struct adapter *);
|
|
void t4vf_sge_start(struct adapter *);
|
|
void t4vf_sge_stop(struct adapter *);
|
|
|
|
#endif /* __CXGB4VF_ADAPTER_H__ */
|