path: root/drivers/net/ethernet/netronome/nfp/nfp_main.c

// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2015-2018 Netronome Systems, Inc. */

/*
 * nfp_main.c
 * Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
 *          Alejandro Lucero <alejandro.lucero@netronome.com>
 *          Jason McMullan <jason.mcmullan@netronome.com>
 *          Rolf Neugebauer <rolf.neugebauer@netronome.com>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/firmware.h>
#include <linux/vmalloc.h>
#include <net/devlink.h>

#include "nfpcore/nfp.h"
#include "nfpcore/nfp_cpp.h"
#include "nfpcore/nfp_dev.h"
#include "nfpcore/nfp_nffw.h"
#include "nfpcore/nfp_nsp.h"

#include "nfpcore/nfp6000_pcie.h"

#include "nfp_abi.h"
#include "nfp_app.h"
#include "nfp_main.h"
#include "nfp_net.h"

static const char nfp_driver_name[] = "nfp";

static const struct pci_device_id nfp_pci_device_ids[] = {
	{ PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NFP3800,
	  PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID,
	  PCI_ANY_ID, 0, NFP_DEV_NFP3800,
	},
	{ PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NFP4000,
	  PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID,
	  PCI_ANY_ID, 0, NFP_DEV_NFP6000,
	},
	{ PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NFP5000,
	  PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID,
	  PCI_ANY_ID, 0, NFP_DEV_NFP6000,
	},
	{ PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NFP6000,
	  PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID,
	  PCI_ANY_ID, 0, NFP_DEV_NFP6000,
	},
	{ PCI_VENDOR_ID_CORIGINE, PCI_DEVICE_ID_NFP3800,
	  PCI_VENDOR_ID_CORIGINE, PCI_ANY_ID,
	  PCI_ANY_ID, 0, NFP_DEV_NFP3800,
	},
	{ PCI_VENDOR_ID_CORIGINE, PCI_DEVICE_ID_NFP4000,
	  PCI_VENDOR_ID_CORIGINE, PCI_ANY_ID,
	  PCI_ANY_ID, 0, NFP_DEV_NFP6000,
	},
	{ PCI_VENDOR_ID_CORIGINE, PCI_DEVICE_ID_NFP5000,
	  PCI_VENDOR_ID_CORIGINE, PCI_ANY_ID,
	  PCI_ANY_ID, 0, NFP_DEV_NFP6000,
	},
	{ PCI_VENDOR_ID_CORIGINE, PCI_DEVICE_ID_NFP6000,
	  PCI_VENDOR_ID_CORIGINE, PCI_ANY_ID,
	  PCI_ANY_ID, 0, NFP_DEV_NFP6000,
	},
	{ 0, } /* Required last entry. */
};
MODULE_DEVICE_TABLE(pci, nfp_pci_device_ids);

int nfp_pf_rtsym_read_optional(struct nfp_pf *pf, const char *format,
			       unsigned int default_val)
{
	char name[256];
	int err = 0;
	u64 val;

	snprintf(name, sizeof(name), format, nfp_cppcore_pcie_unit(pf->cpp));

	val = nfp_rtsym_read_le(pf->rtbl, name, &err);
	if (err) {
		if (err == -ENOENT)
			return default_val;
		nfp_err(pf->cpp, "Unable to read symbol %s\n", name);
		return err;
	}

	return val;
}

u8 __iomem *
nfp_pf_map_rtsym(struct nfp_pf *pf, const char *name, const char *sym_fmt,
		 unsigned int min_size, struct nfp_cpp_area **area)
{
	char pf_symbol[256];

	snprintf(pf_symbol, sizeof(pf_symbol), sym_fmt,
		 nfp_cppcore_pcie_unit(pf->cpp));

	return nfp_rtsym_map(pf->rtbl, pf_symbol, name, min_size, area);
}

/* Callers should hold the devlink instance lock */
int nfp_mbox_cmd(struct nfp_pf *pf, u32 cmd, void *in_data, u64 in_length,
		 void *out_data, u64 out_length)
{
	unsigned long err_at;
	u64 max_data_sz;
	u32 val = 0;
	int n, err;

	if (!pf->mbox)
		return -EOPNOTSUPP;

	max_data_sz = nfp_rtsym_size(pf->mbox) - NFP_MBOX_SYM_MIN_SIZE;

	/* Check if cmd field is clear */
	err = nfp_rtsym_readl(pf->cpp, pf->mbox, NFP_MBOX_CMD, &val);
	if (err || val) {
		nfp_warn(pf->cpp, "failed to issue command (%u): %u, err: %d\n",
			 cmd, val, err);
		return err ?: -EBUSY;
	}

	in_length = min(in_length, max_data_sz);
	n = nfp_rtsym_write(pf->cpp, pf->mbox, NFP_MBOX_DATA, in_data,
			    in_length);
	if (n != in_length)
		return -EIO;
	/* Write data_len and wipe reserved */
	err = nfp_rtsym_writeq(pf->cpp, pf->mbox, NFP_MBOX_DATA_LEN, in_length);
	if (err)
		return err;

	/* Read back for ordering */
	err = nfp_rtsym_readl(pf->cpp, pf->mbox, NFP_MBOX_DATA_LEN, &val);
	if (err)
		return err;

	/* Write cmd and wipe return value */
	err = nfp_rtsym_writeq(pf->cpp, pf->mbox, NFP_MBOX_CMD, cmd);
	if (err)
		return err;

	err_at = jiffies + 5 * HZ;
	while (true) {
		/* Wait for command to go to 0 (NFP_MBOX_NO_CMD) */
		err = nfp_rtsym_readl(pf->cpp, pf->mbox, NFP_MBOX_CMD, &val);
		if (err)
			return err;
		if (!val)
			break;

		if (time_is_before_eq_jiffies(err_at))
			return -ETIMEDOUT;

		msleep(5);
	}

	/* Copy output if any (could be error info, do it before reading ret) */
	err = nfp_rtsym_readl(pf->cpp, pf->mbox, NFP_MBOX_DATA_LEN, &val);
	if (err)
		return err;

	out_length = min_t(u32, val, min(out_length, max_data_sz));
	n = nfp_rtsym_read(pf->cpp, pf->mbox, NFP_MBOX_DATA,
			   out_data, out_length);
	if (n != out_length)
		return -EIO;

	/* Check if there is an error */
	err = nfp_rtsym_readl(pf->cpp, pf->mbox, NFP_MBOX_RET, &val);
	if (err)
		return err;
	if (val)
		return -val;

	return out_length;
}

static