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/**********************************************************************
* Author: Cavium, Inc.
*
* Contact: support@cavium.com
* Please include "LiquidIO" in the subject.
*
* Copyright (c) 2003-2016 Cavium, Inc.
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, Version 2, as
* published by the Free Software Foundation.
*
* This file is distributed in the hope that it will be useful, but
* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
* NONINFRINGEMENT. See the GNU General Public License for more details.
***********************************************************************/
/*! \file octeon_main.h
* \brief Host Driver: This file is included by all host driver source files
* to include common definitions.
*/
#ifndef _OCTEON_MAIN_H_
#define _OCTEON_MAIN_H_
#include <linux/sched/signal.h>
#if BITS_PER_LONG == 32
#define CVM_CAST64(v) ((long long)(v))
#elif BITS_PER_LONG == 64
#define CVM_CAST64(v) ((long long)(long)(v))
#else
#error "Unknown system architecture"
#endif
#define DRV_NAME "LiquidIO"
struct octeon_device_priv {
/** Tasklet structures for this device. */
struct tasklet_struct droq_tasklet;
unsigned long napi_mask;
};
/** This structure is used by NIC driver to store information required
* to free the sk_buff when the packet has been fetched by Octeon.
* Bytes offset below assume worst-case of a 64-bit system.
*/
struct octnet_buf_free_info {
/** Bytes 1-8. Pointer to network device private structure. */
struct lio *lio;
/** Bytes 9-16. Pointer to sk_buff. */
struct sk_buff *skb;
/** Bytes 17-24. Pointer to gather list. */
struct octnic_gather *g;
/** Bytes 25-32. Physical address of skb->data or gather list. */
u64 dptr;
/** Bytes 33-47. Piggybacked soft command, if any */
struct octeon_soft_command *sc;
};
/* BQL-related functions */
void octeon_report_sent_bytes_to_bql(void *buf, int reqtype);
void octeon_update_tx_completion_counters(void *buf, int reqtype,
unsigned int *pkts_compl,
unsigned int *bytes_compl);
void octeon_report_tx_completion_to_bql(void *txq, unsigned int pkts_compl,
unsigned int bytes_compl);
void octeon_pf_changed_vf_macaddr(struct octeon_device *oct, u8 *mac);
/** Swap 8B blocks */
static inline void octeon_swap_8B_data(u64 *data, u32 blocks)
{
while (blocks) {
cpu_to_be64s(data);
blocks--;
data++;
}
}
/**
* \brief unmaps a PCI BAR
* @param oct Pointer to Octeon device
* @param baridx bar index
*/
static inline void octeon_unmap_pci_barx(struct octeon_device *oct, int baridx)
{
dev_dbg(&oct->pci_dev->dev, "Freeing PCI mapped regions for Bar%d\n",
baridx);
if (oct->mmio[baridx].done)
iounmap(oct->mmio[baridx].hw_addr);
if (oct->mmio[baridx].start)
pci_release_region(oct->pci_dev, baridx * 2);
}
/**
* \brief maps a PCI BAR
* @param oct Pointer to Octeon device
* @param baridx bar index
* @param max_map_len maximum length of mapped memory
*/
static inline int octeon_map_pci_barx(struct octeon_device *oct,
int baridx, int max_map_len)
{
u32 mapped_len = 0;
if (pci_request_region(oct->pci_dev, baridx * 2, DRV_NAME)) {
dev_err(&oct->pci_dev->dev, "pci_request_region failed for bar %d\n",
baridx);
return 1;
}
oct->mmio[baridx].start = pci_resource_start(oct->pci_dev, baridx * 2);
oct->mmio[baridx].len = pci_resource_len(oct->pci_dev, baridx * 2);
mapped_len = oct->mmio[baridx].len;
if (!mapped_len)
goto err_release_region;
if (max_map_len && (mapped_len > max_map_len))
mapped_len = max_map_len;
oct->mmio[baridx].hw_addr =
ioremap(oct->mmio[baridx].start, mapped_len);
oct->mmio[baridx].mapped_len = mapped_len;
dev_dbg(&oct->pci_dev->dev, "BAR%d start: 0x%llx mapped %u of %u bytes\n",
baridx, oct->mmio[baridx].start, mapped_len,
oct->mmio[baridx].len);
if (!oct->mmio[baridx].hw_addr) {
dev_err(&oct->pci_dev->dev, "error ioremap for bar %d\n",
baridx);
goto err_release_region;
}
oct->mmio[baridx].done = 1;
return 0;
err_release_region:
pci_release_region(oct->pci_dev, baridx * 2);
return 1;
}
static inline int
sleep_cond(wait_queue_head_t *wait_queue, int *condition)
{
int errno = 0;
wait_queue_entry_t we;
init_waitqueue_entry(&we, current);
add_wait_queue(wait_queue, &we);
while (!(READ_ONCE(*condition))) {
set_current_state(TASK_INTERRUPTIBLE);
if (signal_pending(current)) {
errno = -EINTR;
goto out;
}
schedule();
}
out:
set_current_state(TASK_RUNNING);
remove_wait_queue(wait_queue, &we);
return errno;
}
/* Gives up the CPU for a timeout period.
* Check that the condition is not true before we go to sleep for a
* timeout period.
*/
static inline void
sleep_timeout_cond(wait_queue_head_t *wait_queue,
int *condition,
int timeout)
{
wait_queue_entry_t we;
init_waitqueue_entry(&we, current);
add_wait_queue(wait_queue, &we);
set_current_state(TASK_INTERRUPTIBLE);
if (!(*condition))
schedule_timeout(timeout);
set_current_state(TASK_RUNNING);
remove_wait_queue(wait_queue, &we);
}
#ifndef ROUNDUP4
#define ROUNDUP4(val) (((val) + 3) & 0xfffffffc)
#endif
#ifndef ROUNDUP8
#define ROUNDUP8(val) (((val) + 7) & 0xfffffff8)
#endif
#ifndef ROUNDUP16
#define ROUNDUP16(val) (((val) + 15) & 0xfffffff0)
#endif
#ifndef ROUNDUP128
#define ROUNDUP128(val) (((val) + 127) & 0xffffff80)
#endif
#endif /* _OCTEON_MAIN_H_ */
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