cxgb4_main.c

/*
 * This file is part of the Chelsio T4 Ethernet driver for Linux.
 *
 * Copyright (c) 2003-2010 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.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/bitmap.h>
#include <linux/crc32.h>
#include <linux/ctype.h>
#include <linux/debugfs.h>
#include <linux/err.h>
#include <linux/etherdevice.h>
#include <linux/firmware.h>
#include <linux/if_vlan.h>
#include <linux/init.h>
#include <linux/log2.h>
#include <linux/mdio.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/mutex.h>
#include <linux/netdevice.h>
#include <linux/pci.h>
#include <linux/aer.h>
#include <linux/rtnetlink.h>
#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/sockios.h>
#include <linux/vmalloc.h>
#include <linux/workqueue.h>
#include <net/neighbour.h>
#include <net/netevent.h>
#include <asm/uaccess.h>

#include "cxgb4.h"
#include "t4_regs.h"
#include "t4_msg.h"
#include "t4fw_api.h"
#include "l2t.h"

#define DRV_VERSION "1.0.0-ko"
#define DRV_DESC "Chelsio T4 Network Driver"

/*
 * Max interrupt hold-off timer value in us.  Queues fall back to this value
 * under extreme memory pressure so it's largish to give the system time to
 * recover.
 */
#define MAX_SGE_TIMERVAL 200U

#ifdef CONFIG_PCI_IOV
/*
 * Virtual Function provisioning constants.  We need two extra Ingress Queues
 * with Interrupt capability to serve as the VF's Firmware Event Queue and
 * Forwarded Interrupt Queue (when using MSI mode) -- neither will have Free
 * Lists associated with them).  For each Ethernet/Control Egress Queue and
 * for each Free List, we need an Egress Context.
 */
enum {
	VFRES_NPORTS = 1,		/* # of "ports" per VF */
	VFRES_NQSETS = 2,		/* # of "Queue Sets" per VF */

	VFRES_NVI = VFRES_NPORTS,	/* # of Virtual Interfaces */
	VFRES_NETHCTRL = VFRES_NQSETS,	/* # of EQs used for ETH or CTRL Qs */
	VFRES_NIQFLINT = VFRES_NQSETS+2,/* # of ingress Qs/w Free List(s)/intr */
	VFRES_NIQ = 0,			/* # of non-fl/int ingress queues */
	VFRES_NEQ = VFRES_NQSETS*2,	/* # of egress queues */
	VFRES_TC = 0,			/* PCI-E traffic class */
	VFRES_NEXACTF = 16,		/* # of exact MPS filters */

	VFRES_R_CAPS = FW_CMD_CAP_DMAQ|FW_CMD_CAP_VF|FW_CMD_CAP_PORT,
	VFRES_WX_CAPS = FW_CMD_CAP_DMAQ|FW_CMD_CAP_VF,
};

/*
 * Provide a Port Access Rights Mask for the specified PF/VF.  This is very
 * static and likely not to be useful in the long run.  We really need to
 * implement some form of persistent configuration which the firmware
 * controls.
 */
static unsigned int pfvfres_pmask(struct adapter *adapter,
				  unsigned int pf, unsigned int vf)
{
	unsigned int portn, portvec;

	/*
	 * Give PF's access to all of the ports.
	 */
	if (vf == 0)
		return FW_PFVF_CMD_PMASK_MASK;

	/*
	 * For VFs, we'll assign them access to the ports based purely on the
	 * PF.  We assign active ports in order, wrapping around if there are
	 * fewer active ports than PFs: e.g. active port[pf % nports].
	 * Unfortunately the adapter's port_info structs haven't been
	 * initialized yet so we have to compute this.
	 */
	if (adapter->params.nports == 0)
		return 0;

	portn = pf % adapter->params.nports;
	portvec = adapter->params.portvec;
	for (;;) {
		/*
		 * Isolate the lowest set bit in the port vector.  If we're at
		 * the port number that we want, return that as the pmask.
		 * otherwise mask that bit out of the port vector and
		 * decrement our port number ...
		 */
		unsigned int pmask = portvec ^ (portvec & (portvec-1));
		if (portn == 0)
			return pmask;
		portn--;
		portvec &= ~pmask;
	}
	/*NOTREACHED*/
}
#endif

enum {
	MEMWIN0_APERTURE = 65536,
	MEMWIN0_BASE     = 0x30000,
	MEMWIN1_APERTURE = 32768,
	MEMWIN1_BASE     = 0x28000,
	MEMWIN2_APERTURE = 2048,
	MEMWIN2_BASE     = 0x1b800,
};

enum {
	MAX_TXQ_ENTRIES      = 16384,
	MAX_CTRL_TXQ_ENTRIES = 1024,
	MAX_RSPQ_ENTRIES     = 16384,
	MAX_RX_BUFFERS       = 16384,
	MIN_TXQ_ENTRIES      = 32,
	MIN_CTRL_TXQ_ENTRIES = 32,
	MIN_RSPQ_ENTRIES     = 128,
	MIN_FL_ENTRIES       = 16
};

#define DFLT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK | \
			 NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP |\
			 NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR)

#define CH_DEVICE(devid) { PCI_VDEVICE(CHELSIO, devid), 0 }

static DEFINE_PCI_DEVICE_TABLE(cxgb4_pci_tbl) = {
	CH_DEVICE(0xa000),  /* PE10K */
	{ 0, }
};

#define FW_FNAME "cxgb4/t4fw.bin"

MODULE_DESCRIPTION(DRV_DESC);
MODULE_AUTHOR("Chelsio Communications");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(DRV_VERSION);
MODULE_DEVICE_TABLE(pci, cxgb4_pci_tbl);
MODULE_FIRMWARE(FW_FNAME);

static int dflt_msg_enable = DFLT_MSG_ENABLE;

module_param(dflt_msg_enable, int, 0644);
MODULE_PARM_DESC(dflt_msg_enable, "Chelsio T4 default message enable bitmap");

/*
 * The driver uses the best interrupt scheme available on a platform in the
 * order MSI-X, MSI, legacy INTx interrupts.  This parameter determines which
 * of these schemes the driver may consider as follows:
 *
 * msi = 2: choose from among all three options