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/***********************license start***********************************
* Copyright (c) 2003-2017 Cavium Inc. (support@cavium.com). All rights
* reserved.
*
*
* 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.
*
* * Neither the name of Cavium Inc. nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
*
* This Software, including technical data, may be subject to U.S. export
* control laws, including the U.S. Export Administration Act and its
* associated regulations, and may be subject to export or import
* regulations in other countries.
*
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR
* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT
* TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY
* REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT
* DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES
* OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR
* PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT,
* QUIET POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK
* ARISING OUT OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
***********************license end**************************************/
#include <bdk.h>
#include <string.h>
#include "libbdk-arch/bdk-csrs-ecam.h"
#include "libbdk-arch/bdk-csrs-pccbr.h"
#include "libbdk-arch/bdk-csrs-pccpf.h"
#include "libbdk-arch/bdk-csrs-rvu.h"
#include "libbdk-hal/device/bdk-device.h"
#include "libbdk-hal/bdk-ecam.h"
/* This code is an optional part of the BDK. It is only linked in
if BDK_REQUIRE() needs it */
BDK_REQUIRE_DEFINE(ECAM);
/**
* Walk an ECAM finding all internal devices. Each internal
* device is then added to the list of device maintained by
* bdk-device.
*
* @param node Node to walk
* @param ecam Ecam to walk
* @param bus Zero on first call. Will be non-zero when sub busses are walked
*/
static void ecam_walk_internal_bus(bdk_node_t node, int ecam, int bus)
{
/* Create a fake bdk-device to pass around until we create the
real device */
bdk_device_t device;
memset(&device, 0, sizeof(device));
device.node = node;
device.ecam = ecam;
device.bus = bus;
/* Scan all possible device IDs on the bus */
for (int dev = 0; dev < 32; dev++)
{
/* Update the current scan location */
device.dev = dev;
device.func = 0;
uint32_t device_id = bdk_ecam_read32(&device, BDK_PCCPF_XXX_ID);
/* Only add devices that exist. Our internal devices can have function
zero missing. The all ones we get back matches the multi-function
check, but not a bridge. This means the later code works fine */
if (device_id != (uint32_t)-1)
bdk_device_add(device.node, device.ecam, device.bus, device.dev, device.func);
/* Check for Multi function and Bridge devices */
BDK_CSR_DEFINE(clsize, BDK_PCCPF_XXX_CLSIZE);
clsize.u = bdk_ecam_read32(&device, BDK_PCCPF_XXX_CLSIZE);
int ismultifunction = (clsize.s.hdrtype & 0x80);
int isbridge = (clsize.s.hdrtype & 0x7f) == 1;
if (ismultifunction)
{
/* Scan for other functions on multifunction devices */
for (int func = 1; func < 8; func++)
{
/* Check if we're past all functions */
device.func = func;
device_id = bdk_ecam_read32(&device, BDK_PCCPF_XXX_ID);
if (device_id != (uint32_t)-1)
bdk_device_add(device.node, device.ecam, device.bus, device.dev, device.func);
}
device.func = 0;
}
if (isbridge)
{
/* Internal bus numbers are hard coded. Read the bus ID */
bdk_pccbr_xxx_bus_t ibus;
ibus.u = bdk_ecam_read32(&device, BDK_PCCBR_XXX_BUS);
/* Asim used to have a bug where bus number were zero, report errors
for those */
if (ibus.s.sbnum == 0)
{
bdk_error("N%d:E%d:%d:%d.%d: Secondary bus number is zero\n",
device.node, device.ecam, device.bus, device.dev, device.func);
}
/* Real PCIe external device use high bus numbers, so skip them */
else if (ibus.s.sbnum < 16)
{
ecam_walk_internal_bus(node, ecam, ibus.s.sbnum);
}
}
}
}
/**
* Return the number of internal ECAMS on a node.
*
* @param node Node to query
*
* @return Number of ECAMs available
*/
int bdk_ecam_get_num(bdk_node_t node)
{
/* CN88XX lacks the ECAM_CONST for finding the number of ECAMs */
if (CAVIUM_IS_MODEL(CAVIUM_CN88XX))
return 4;
else if (CAVIUM_IS_MODEL(CAVIUM_CN93XX))
return 3; /* Map ECAMs to the first 3 domains */
else
{
BDK_CSR_INIT(ecam_const, node, BDK_ECAMX_CONST(0));
if (ecam_const.s.ecams == 0)
{
bdk_error("N%d.ECAM: Number of ecams incorrect in ECAMX_CONST\n", node);
return 1;
}
return ecam_const.s.ecams;
}
}
/**
* Initialize RVU functions for use by the BDK. This doesn't setup the hardware
* behind RVU, juse allows register access to it. The BDK uses a static RVU
* configuration where everything is accessable from RVU PF0.
*
* @param node Node to initialize
*
* @return Zero on success, negative on failure
*/
static int __bdk_ecam_rvu_init(bdk_node_t node)
{
const int rvu_pf = 0;
/* Enable PF access to all blocks */
BDK_CSR_MODIFY(c, node, BDK_RVU_PRIV_PFX_CPTX_CFG(rvu_pf, 0),
c.s.num_lfs = 1); // FIXME: How many LFs?
BDK_CSR_MODIFY(c, node, BDK_RVU_PRIV_PFX_INT_CFG(rvu_pf),
c.s.msix_offset = 0);
BDK_CSR_MODIFY(c, node, BDK_RVU_PRIV_PFX_MSIX_CFG(rvu_pf),
c.s.pf_msixt_offset = 0;
c.s.pf_msixt_sizem1 = 0;
c.s.vf_msixt_offset = 0;
c.s.vf_msixt_sizem1 = 0);
BDK_CSR_MODIFY(c, node, BDK_RVU_PRIV_PFX_NIXX_CFG(rvu_pf, 0),
c.s.has_lf = 1);
BDK_CSR_MODIFY(c, node, BDK_RVU_PRIV_PFX_NPA_CFG(rvu_pf),
c.s.has_lf = 1);
BDK_CSR_MODIFY(c, node, BDK_RVU_PRIV_PFX_SSO_CFG(rvu_pf),
c.s.num_lfs = 1); // FIXME: How many LFs?
BDK_CSR_MODIFY(c, node, BDK_RVU_PRIV_PFX_SSOW_CFG(rvu_pf),
c.s.num_lfs = 1); // FIXME: How many LFs?
BDK_CSR_MODIFY(c, node, BDK_RVU_PRIV_PFX_TIM_CFG(rvu_pf),
c.s.num_lfs = 1); // FIXME: How many LFs?
/* Enable RVU with full access */
BDK_CSR_MODIFY(c, node, BDK_RVU_PRIV_PFX_CFG(rvu_pf),
c.s.me_flr_ena = 1;
c.s.af_ena = 1;
c.s.ena = 1;
c.s.nvf = 0;
c.s.first_hwvf = 0);
return 0;
}
/**
* Scan all ECAMs for devices and add them to bdk-device
*
* @param node Node to scan
*
* @return Zero on success, negative on failure
*/
int bdk_ecam_scan_all(bdk_node_t node)
{
/* RVU must be setup before we scan the bus otherwise it doesn't
show up */
if (CAVIUM_IS_MODEL(CAVIUM_CN9XXX))
__bdk_ecam_rvu_init(node);
int num_ecams = bdk_ecam_get_num(node);
for (int ecam = 0; ecam < num_ecams; ecam++)
ecam_walk_internal_bus(node, ecam, 0);
bdk_device_init();
return 0;
}
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