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f-stack/freebsd/contrib/octeon-sdk/cvmx-ipd.c

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/***********************license start***************
* Copyright (c) 2003-2010 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**************************************/
/**
* @file
*
* IPD Support.
*
* <hr>$Revision: 58943 $<hr>
*/
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
#include <linux/module.h>
#include <asm/octeon/cvmx.h>
#include <asm/octeon/cvmx-config.h>
#include <asm/octeon/cvmx-bootmem.h>
#include <asm/octeon/cvmx-pip-defs.h>
#include <asm/octeon/cvmx-dbg-defs.h>
#include <asm/octeon/cvmx-sso-defs.h>
#include <asm/octeon/cvmx-fpa.h>
#include <asm/octeon/cvmx-wqe.h>
#include <asm/octeon/cvmx-ipd.h>
#include <asm/octeon/cvmx-clock.h>
#include <asm/octeon/cvmx-helper-errata.h>
#include <asm/octeon/cvmx-helper-cfg.h>
#else
#if !defined(__FreeBSD__) || !defined(_KERNEL)
#include "executive-config.h"
#endif
#include "cvmx.h"
#include "cvmx-sysinfo.h"
#include "cvmx-bootmem.h"
#include "cvmx-version.h"
#include "cvmx-helper-check-defines.h"
#if !defined(__FreeBSD__) || !defined(_KERNEL)
#include "cvmx-error.h"
#include "cvmx-config.h"
#endif
#include "cvmx-fpa.h"
#include "cvmx-wqe.h"
#include "cvmx-ipd.h"
#include "cvmx-helper-errata.h"
#include "cvmx-helper-cfg.h"
#endif
#ifdef CVMX_ENABLE_PKO_FUNCTIONS
static void __cvmx_ipd_free_ptr_v1(void)
{
/* Only CN38XXp{1,2} cannot read pointer out of the IPD */
if (!OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2)) {
int no_wptr = 0;
cvmx_ipd_ptr_count_t ipd_ptr_count;
ipd_ptr_count.u64 = cvmx_read_csr(CVMX_IPD_PTR_COUNT);
/* Handle Work Queue Entry in cn56xx and cn52xx */
if (octeon_has_feature(OCTEON_FEATURE_NO_WPTR)) {
cvmx_ipd_ctl_status_t ipd_ctl_status;
ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
if (ipd_ctl_status.s.no_wptr)
no_wptr = 1;
}
/* Free the prefetched WQE */
if (ipd_ptr_count.s.wqev_cnt) {
cvmx_ipd_wqe_ptr_valid_t ipd_wqe_ptr_valid;
ipd_wqe_ptr_valid.u64 = cvmx_read_csr(CVMX_IPD_WQE_PTR_VALID);
if (no_wptr)
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_wqe_ptr_valid.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
else
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_wqe_ptr_valid.s.ptr<<7), CVMX_FPA_WQE_POOL, 0);
}
/* Free all WQE in the fifo */
if (ipd_ptr_count.s.wqe_pcnt) {
int i;
cvmx_ipd_pwp_ptr_fifo_ctl_t ipd_pwp_ptr_fifo_ctl;
ipd_pwp_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
for (i = 0; i < ipd_ptr_count.s.wqe_pcnt; i++) {
ipd_pwp_ptr_fifo_ctl.s.cena = 0;
ipd_pwp_ptr_fifo_ctl.s.raddr = ipd_pwp_ptr_fifo_ctl.s.max_cnts + (ipd_pwp_ptr_fifo_ctl.s.wraddr+i) % ipd_pwp_ptr_fifo_ctl.s.max_cnts;
cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL, ipd_pwp_ptr_fifo_ctl.u64);
ipd_pwp_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
if (no_wptr)
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_pwp_ptr_fifo_ctl.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
else
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_pwp_ptr_fifo_ctl.s.ptr<<7), CVMX_FPA_WQE_POOL, 0);
}
ipd_pwp_ptr_fifo_ctl.s.cena = 1;
cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL, ipd_pwp_ptr_fifo_ctl.u64);
}
/* Free the prefetched packet */
if (ipd_ptr_count.s.pktv_cnt) {
cvmx_ipd_pkt_ptr_valid_t ipd_pkt_ptr_valid;
ipd_pkt_ptr_valid.u64 = cvmx_read_csr(CVMX_IPD_PKT_PTR_VALID);
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_pkt_ptr_valid.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
}
/* Free the per port prefetched packets */
if (1) {
int i;
cvmx_ipd_prc_port_ptr_fifo_ctl_t ipd_prc_port_ptr_fifo_ctl;
ipd_prc_port_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL);
for (i = 0; i < ipd_prc_port_ptr_fifo_ctl.s.max_pkt; i++) {
ipd_prc_port_ptr_fifo_ctl.s.cena = 0;
ipd_prc_port_ptr_fifo_ctl.s.raddr = i % ipd_prc_port_ptr_fifo_ctl.s.max_pkt;
cvmx_write_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL, ipd_prc_port_ptr_fifo_ctl.u64);
ipd_prc_port_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL);
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_prc_port_ptr_fifo_ctl.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
}
ipd_prc_port_ptr_fifo_ctl.s.cena = 1;
cvmx_write_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL, ipd_prc_port_ptr_fifo_ctl.u64);
}
/* Free all packets in the holding fifo */
if (ipd_ptr_count.s.pfif_cnt) {
int i;
cvmx_ipd_prc_hold_ptr_fifo_ctl_t ipd_prc_hold_ptr_fifo_ctl;
ipd_prc_hold_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL);
for (i = 0; i < ipd_ptr_count.s.pfif_cnt; i++) {
ipd_prc_hold_ptr_fifo_ctl.s.cena = 0;
ipd_prc_hold_ptr_fifo_ctl.s.raddr = (ipd_prc_hold_ptr_fifo_ctl.s.praddr + i) % ipd_prc_hold_ptr_fifo_ctl.s.max_pkt;
cvmx_write_csr(CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL, ipd_prc_hold_ptr_fifo_ctl.u64);
ipd_prc_hold_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL);
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_prc_hold_ptr_fifo_ctl.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
}
ipd_prc_hold_ptr_fifo_ctl.s.cena = 1;
cvmx_write_csr(CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL, ipd_prc_hold_ptr_fifo_ctl.u64);
}
/* Free all packets in the fifo */
if (ipd_ptr_count.s.pkt_pcnt) {
int i;
cvmx_ipd_pwp_ptr_fifo_ctl_t ipd_pwp_ptr_fifo_ctl;
ipd_pwp_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
for (i = 0; i < ipd_ptr_count.s.pkt_pcnt; i++) {
ipd_pwp_ptr_fifo_ctl.s.cena = 0;
ipd_pwp_ptr_fifo_ctl.s.raddr = (ipd_pwp_ptr_fifo_ctl.s.praddr+i) % ipd_pwp_ptr_fifo_ctl.s.max_cnts;
cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL, ipd_pwp_ptr_fifo_ctl.u64);
ipd_pwp_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_pwp_ptr_fifo_ctl.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
}
ipd_pwp_ptr_fifo_ctl.s.cena = 1;
cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL, ipd_pwp_ptr_fifo_ctl.u64);
}
}
}
static void __cvmx_ipd_free_ptr_v2(void)
{
int no_wptr = 0;
int i;
cvmx_ipd_port_ptr_fifo_ctl_t ipd_port_ptr_fifo_ctl;
cvmx_ipd_ptr_count_t ipd_ptr_count;
ipd_ptr_count.u64 = cvmx_read_csr(CVMX_IPD_PTR_COUNT);
/* Handle Work Queue Entry in cn68xx */
if (octeon_has_feature(OCTEON_FEATURE_NO_WPTR)) {
cvmx_ipd_ctl_status_t ipd_ctl_status;
ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
if (ipd_ctl_status.s.no_wptr)
no_wptr = 1;
}
/* Free the prefetched WQE */
if (ipd_ptr_count.s.wqev_cnt) {
cvmx_ipd_next_wqe_ptr_t ipd_next_wqe_ptr;
ipd_next_wqe_ptr.u64 = cvmx_read_csr(CVMX_IPD_NEXT_WQE_PTR);
if (no_wptr)
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_next_wqe_ptr.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
else
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_next_wqe_ptr.s.ptr<<7), CVMX_FPA_WQE_POOL, 0);
}
/* Free all WQE in the fifo */
if (ipd_ptr_count.s.wqe_pcnt) {
cvmx_ipd_free_ptr_fifo_ctl_t ipd_free_ptr_fifo_ctl;
cvmx_ipd_free_ptr_value_t ipd_free_ptr_value;
ipd_free_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_FREE_PTR_FIFO_CTL);
for (i = 0; i < ipd_ptr_count.s.wqe_pcnt; i++) {
ipd_free_ptr_fifo_ctl.s.cena = 0;
ipd_free_ptr_fifo_ctl.s.raddr = ipd_free_ptr_fifo_ctl.s.max_cnts + (ipd_free_ptr_fifo_ctl.s.wraddr+i) % ipd_free_ptr_fifo_ctl.s.max_cnts;
cvmx_write_csr(CVMX_IPD_FREE_PTR_FIFO_CTL, ipd_free_ptr_fifo_ctl.u64);
ipd_free_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_FREE_PTR_FIFO_CTL);
ipd_free_ptr_value.u64 = cvmx_read_csr(CVMX_IPD_FREE_PTR_VALUE);
if (no_wptr)
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_free_ptr_value.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
else
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_free_ptr_value.s.ptr<<7), CVMX_FPA_WQE_POOL, 0);
}
ipd_free_ptr_fifo_ctl.s.cena = 1;
cvmx_write_csr(CVMX_IPD_FREE_PTR_FIFO_CTL, ipd_free_ptr_fifo_ctl.u64);
}
/* Free the prefetched packet */
if (ipd_ptr_count.s.pktv_cnt) {
cvmx_ipd_next_pkt_ptr_t ipd_next_pkt_ptr;
ipd_next_pkt_ptr.u64 = cvmx_read_csr(CVMX_IPD_NEXT_PKT_PTR);
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_next_pkt_ptr.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
}
/* Free the per port prefetched packets */
ipd_port_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PORT_PTR_FIFO_CTL);
for (i = 0; i < ipd_port_ptr_fifo_ctl.s.max_pkt; i++) {
ipd_port_ptr_fifo_ctl.s.cena = 0;
ipd_port_ptr_fifo_ctl.s.raddr = i % ipd_port_ptr_fifo_ctl.s.max_pkt;
cvmx_write_csr(CVMX_IPD_PORT_PTR_FIFO_CTL, ipd_port_ptr_fifo_ctl.u64);
ipd_port_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PORT_PTR_FIFO_CTL);
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_port_ptr_fifo_ctl.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
}
ipd_port_ptr_fifo_ctl.s.cena = 1;
cvmx_write_csr(CVMX_IPD_PORT_PTR_FIFO_CTL, ipd_port_ptr_fifo_ctl.u64);
/* Free all packets in the holding fifo */
if (ipd_ptr_count.s.pfif_cnt) {
cvmx_ipd_hold_ptr_fifo_ctl_t ipd_hold_ptr_fifo_ctl;
ipd_hold_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_HOLD_PTR_FIFO_CTL);
for (i = 0; i < ipd_ptr_count.s.pfif_cnt; i++) {
ipd_hold_ptr_fifo_ctl.s.cena = 0;
ipd_hold_ptr_fifo_ctl.s.raddr = (ipd_hold_ptr_fifo_ctl.s.praddr + i) % ipd_hold_ptr_fifo_ctl.s.max_pkt;
cvmx_write_csr(CVMX_IPD_HOLD_PTR_FIFO_CTL, ipd_hold_ptr_fifo_ctl.u64);
ipd_hold_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_HOLD_PTR_FIFO_CTL);
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_hold_ptr_fifo_ctl.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
}
ipd_hold_ptr_fifo_ctl.s.cena = 1;
cvmx_write_csr(CVMX_IPD_HOLD_PTR_FIFO_CTL, ipd_hold_ptr_fifo_ctl.u64);
}
/* Free all packets in the fifo */
if (ipd_ptr_count.s.pkt_pcnt) {
cvmx_ipd_free_ptr_fifo_ctl_t ipd_free_ptr_fifo_ctl;
cvmx_ipd_free_ptr_value_t ipd_free_ptr_value;
ipd_free_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_FREE_PTR_FIFO_CTL);
for (i = 0; i < ipd_ptr_count.s.pkt_pcnt; i++) {
ipd_free_ptr_fifo_ctl.s.cena = 0;
ipd_free_ptr_fifo_ctl.s.raddr = (ipd_free_ptr_fifo_ctl.s.praddr+i) % ipd_free_ptr_fifo_ctl.s.max_cnts;
cvmx_write_csr(CVMX_IPD_FREE_PTR_FIFO_CTL, ipd_free_ptr_fifo_ctl.u64);
ipd_free_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_FREE_PTR_FIFO_CTL);
ipd_free_ptr_value.u64 = cvmx_read_csr(CVMX_IPD_FREE_PTR_VALUE);
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_free_ptr_value.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
}
ipd_free_ptr_fifo_ctl.s.cena = 1;
cvmx_write_csr(CVMX_IPD_FREE_PTR_FIFO_CTL, ipd_free_ptr_fifo_ctl.u64);
}
}
/**
* @INTERNAL
* This function is called by cvmx_helper_shutdown() to extract
* all FPA buffers out of the IPD and PIP. After this function
* completes, all FPA buffers that were prefetched by IPD and PIP
* wil be in the apropriate FPA pool. This functions does not reset
* PIP or IPD as FPA pool zero must be empty before the reset can
* be performed. WARNING: It is very important that IPD and PIP be
* reset soon after a call to this function.
*/
void __cvmx_ipd_free_ptr(void)
{
if (octeon_has_feature(OCTEON_FEATURE_PKND))
__cvmx_ipd_free_ptr_v2();
else
__cvmx_ipd_free_ptr_v1();
}
#endif
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