237 lines
6.8 KiB
C
237 lines
6.8 KiB
C
/**********************************************************************
|
|
* 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;
|
|
struct octeon_device *dev;
|
|
};
|
|
|
|
/** 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 */
|
|
int 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);
|
|
|
|
void octeon_schedule_rxq_oom_work(struct octeon_device *oct,
|
|
struct octeon_droq *droq);
|
|
|
|
/** 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;
|
|
}
|
|
|
|
/* input parameter:
|
|
* sc: pointer to a soft request
|
|
* timeout: milli sec which an application wants to wait for the
|
|
response of the request.
|
|
* 0: the request will wait until its response gets back
|
|
* from the firmware within LIO_SC_MAX_TMO_MS milli sec.
|
|
* It the response does not return within
|
|
* LIO_SC_MAX_TMO_MS milli sec, lio_process_ordered_list()
|
|
* will move the request to zombie response list.
|
|
*
|
|
* return value:
|
|
* 0: got the response from firmware for the sc request.
|
|
* errno -EINTR: user abort the command.
|
|
* errno -ETIME: user spefified timeout value has been expired.
|
|
* errno -EBUSY: the response of the request does not return in
|
|
* resonable time (LIO_SC_MAX_TMO_MS).
|
|
* the sc wll be move to zombie response list by
|
|
* lio_process_ordered_list()
|
|
*
|
|
* A request with non-zero return value, the sc->caller_is_done
|
|
* will be marked 1.
|
|
* When getting a request with zero return value, the requestor
|
|
* should mark sc->caller_is_done with 1 after examing the
|
|
* response of sc.
|
|
* lio_process_ordered_list() will free the soft command on behalf
|
|
* of the soft command requestor.
|
|
* This is to fix the possible race condition of both timeout process
|
|
* and lio_process_ordered_list()/callback function to free a
|
|
* sc strucutre.
|
|
*/
|
|
static inline int
|
|
wait_for_sc_completion_timeout(struct octeon_device *oct_dev,
|
|
struct octeon_soft_command *sc,
|
|
unsigned long timeout)
|
|
{
|
|
int errno = 0;
|
|
long timeout_jiff;
|
|
|
|
if (timeout)
|
|
timeout_jiff = msecs_to_jiffies(timeout);
|
|
else
|
|
timeout_jiff = MAX_SCHEDULE_TIMEOUT;
|
|
|
|
timeout_jiff =
|
|
wait_for_completion_interruptible_timeout(&sc->complete,
|
|
timeout_jiff);
|
|
if (timeout_jiff == 0) {
|
|
dev_err(&oct_dev->pci_dev->dev, "%s: sc is timeout\n",
|
|
__func__);
|
|
WRITE_ONCE(sc->caller_is_done, true);
|
|
errno = -ETIME;
|
|
} else if (timeout_jiff == -ERESTARTSYS) {
|
|
dev_err(&oct_dev->pci_dev->dev, "%s: sc is interrupted\n",
|
|
__func__);
|
|
WRITE_ONCE(sc->caller_is_done, true);
|
|
errno = -EINTR;
|
|
} else if (sc->sc_status == OCTEON_REQUEST_TIMEOUT) {
|
|
dev_err(&oct_dev->pci_dev->dev, "%s: sc has fatal timeout\n",
|
|
__func__);
|
|
WRITE_ONCE(sc->caller_is_done, true);
|
|
errno = -EBUSY;
|
|
}
|
|
|
|
return errno;
|
|
}
|
|
|
|
#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_ */
|