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-rw-r--r--drivers/net/cxgb4vf/adapter.h534
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diff --git a/drivers/net/cxgb4vf/adapter.h b/drivers/net/cxgb4vf/adapter.h
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index 594334d5c71..00000000000
--- a/drivers/net/cxgb4vf/adapter.h
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-/*
- * 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/interrupt.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_IQFLINT = 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 */
- 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 nqsets; /* # of "Queue Sets" */
- u8 first_qset; /* index of first "Queue Set" */
- struct link_config link_cfg; /* physical port configuration */
-};
-
-/*
- * 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__ */