diff options
author | David Daney <ddaney@caviumnetworks.com> | 2009-05-05 17:35:21 -0700 |
---|---|---|
committer | Ralf Baechle <ralf@linux-mips.org> | 2009-06-17 11:06:30 +0100 |
commit | 80ff0fd3ab6451407a20c19b80c1643c4a6d6434 (patch) | |
tree | 2d7021ac34269f0bce3ac18f7347bf6946640f36 /drivers/staging/octeon/cvmx-helper-npi.c | |
parent | 38295fb2a09264671c82d490ce77c17d492378e0 (diff) |
Staging: Add octeon-ethernet driver files.
The octeon-ethernet driver supports the sgmii, rgmii, spi, and xaui
ports present on the Cavium OCTEON family of SOCs. These SOCs are
multi-core mips64 processors with existing support over in arch/mips.
The driver files can be categorized into three basic groups:
1) Register definitions, these are named cvmx-*-defs.h
2) Main driver code, these have names that don't start cvmx-.
3) Interface specific functions and other utility code, names starting
with cvmx-
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'drivers/staging/octeon/cvmx-helper-npi.c')
-rw-r--r-- | drivers/staging/octeon/cvmx-helper-npi.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/drivers/staging/octeon/cvmx-helper-npi.c b/drivers/staging/octeon/cvmx-helper-npi.c new file mode 100644 index 00000000000..7388a1e72b3 --- /dev/null +++ b/drivers/staging/octeon/cvmx-helper-npi.c @@ -0,0 +1,113 @@ +/***********************license start*************** + * Author: Cavium Networks + * + * Contact: support@caviumnetworks.com + * This file is part of the OCTEON SDK + * + * Copyright (c) 2003-2008 Cavium Networks + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this file; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * or visit http://www.gnu.org/licenses/. + * + * This file may also be available under a different license from Cavium. + * Contact Cavium Networks for more information + ***********************license end**************************************/ + +/* + * Functions for NPI initialization, configuration, + * and monitoring. + */ +#include <asm/octeon/octeon.h> + +#include "cvmx-config.h" + +#include "cvmx-helper.h" + +#include "cvmx-pip-defs.h" + +/** + * Probe a NPI interface and determine the number of ports + * connected to it. The NPI interface should still be down + * after this call. + * + * @interface: Interface to probe + * + * Returns Number of ports on the interface. Zero to disable. + */ +int __cvmx_helper_npi_probe(int interface) +{ +#if CVMX_PKO_QUEUES_PER_PORT_PCI > 0 + if (OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX)) + return 4; + else if (OCTEON_IS_MODEL(OCTEON_CN56XX) + && !OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_X)) + /* The packet engines didn't exist before pass 2 */ + return 4; + else if (OCTEON_IS_MODEL(OCTEON_CN52XX) + && !OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X)) + /* The packet engines didn't exist before pass 2 */ + return 4; +#if 0 + /* + * Technically CN30XX, CN31XX, and CN50XX contain packet + * engines, but nobody ever uses them. Since this is the case, + * we disable them here. + */ + else if (OCTEON_IS_MODEL(OCTEON_CN31XX) + || OCTEON_IS_MODEL(OCTEON_CN50XX)) + return 2; + else if (OCTEON_IS_MODEL(OCTEON_CN30XX)) + return 1; +#endif +#endif + return 0; +} + +/** + * Bringup and enable a NPI interface. After this call packet + * I/O should be fully functional. This is called with IPD + * enabled but PKO disabled. + * + * @interface: Interface to bring up + * + * Returns Zero on success, negative on failure + */ +int __cvmx_helper_npi_enable(int interface) +{ + /* + * On CN50XX, CN52XX, and CN56XX we need to disable length + * checking so packet < 64 bytes and jumbo frames don't get + * errors. + */ + if (!OCTEON_IS_MODEL(OCTEON_CN3XXX) && + !OCTEON_IS_MODEL(OCTEON_CN58XX)) { + int num_ports = cvmx_helper_ports_on_interface(interface); + int port; + for (port = 0; port < num_ports; port++) { + union cvmx_pip_prt_cfgx port_cfg; + int ipd_port = + cvmx_helper_get_ipd_port(interface, port); + port_cfg.u64 = + cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port)); + port_cfg.s.maxerr_en = 0; + port_cfg.s.minerr_en = 0; + cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), + port_cfg.u64); + } + } + + /* Enables are controlled by the remote host, so nothing to do here */ + return 0; +} |