diff options
Diffstat (limited to 'src/vendorcode/cavium/bdk/libbdk-hal/bdk-ecam.c')
| -rw-r--r-- | src/vendorcode/cavium/bdk/libbdk-hal/bdk-ecam.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/src/vendorcode/cavium/bdk/libbdk-hal/bdk-ecam.c b/src/vendorcode/cavium/bdk/libbdk-hal/bdk-ecam.c new file mode 100644 index 0000000000..f79eb587f4 --- /dev/null +++ b/src/vendorcode/cavium/bdk/libbdk-hal/bdk-ecam.c @@ -0,0 +1,216 @@ +/***********************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; +} + |