xref: /f-stack/freebsd/mips/nlm/hal/fmn.c (revision 22ce4aff)

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright 2003-2011 Netlogic Microsystems (Netlogic). All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY Netlogic Microsystems ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 *
 * NETLOGIC_BSD */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/systm.h>

#include <machine/cpufunc.h>
#include <mips/nlm/hal/mips-extns.h>
#include <mips/nlm/hal/haldefs.h>
#include <mips/nlm/hal/iomap.h>
#include <mips/nlm/hal/fmn.h>

/* XLP can take upto 16K of FMN messages per hardware queue, as spill.
* But, configuring all 16K causes the total spill memory to required
* to blow upto 192MB for single chip configuration, and 768MB in four
* chip configuration. Hence for now, we will setup the per queue spill
* as 1K FMN messages. With this, the total spill memory needed for 1024
* hardware queues (with 12bytes per single entry FMN message) becomes
* (1*1024)*12*1024queues = 12MB. For the four chip config, the memory
* needed = 12 * 4 = 48MB.
*/
uint64_t nlm_cms_spill_total_messages = 1 * 1024;

/* On a XLP832, we have the following FMN stations:
* CPU    stations: 8
* PCIE0  stations: 1
* PCIE1  stations: 1
* PCIE2  stations: 1
* PCIE3  stations: 1
* GDX    stations: 1
* CRYPTO stations: 1
* RSA    stations: 1
* CMP    stations: 1
* POE    stations: 1
* NAE    stations: 1
* ==================
* Total          : 18 stations per chip
*
* For all 4 nodes, there are 18*4 = 72 FMN stations
*/
uint32_t nlm_cms_total_stations = 18 * 4 /*xlp_num_nodes*/;

/**
 * Takes inputs as node, queue_size and maximum number of queues.
 * Calculates the base, start & end and returns the same for a
 * defined qid.
 *
 * The output queues are maintained in the internal output buffer
 * which is a on-chip SRAM structure. For the actial hardware
 * internal implementation, It is a structure which consists
 * of eight banks of 4096-entry x message-width SRAMs. The SRAM
 * implementation is designed to run at 1GHz with a 1-cycle read/write
 * access. A read/write transaction can be initiated for each bank
 * every cycle for a total of eight accesses per cycle. Successive
 * entries of the same output queue are placed in successive banks.
 * This is done to spread different read & write accesses to same/different
 * output queue over as many different banks as possible so that they
 * can be scheduled concurrently. Spreading the accesses to as many banks
 * as possible to maximize the concurrency internally is important for
 * achieving the desired peak throughput. This is done by h/w implementation
 * itself.
 *
 * Output queues are allocated from this internal output buffer by
 * software. The total capacity of the output buffer is 32K-entry.
 * Each output queue can be sized from 32-entry to 1024-entry in
 * increments of 32-entry. This is done by specifying a Start & a
 * End pointer: pointers to the first & last 32-entry chunks allocated
 * to the output queue.
 *
 * To optimize the storage required for 1024 OQ pointers, the upper 5-bits
 * are shared by the Start & the End pointer. The side-effect of this
 * optimization is that an OQ can't cross a 1024-entry boundary. Also, the
 * lower 5-bits don't need to be specified in the Start & the End pointer
 * as the allocation is in increments of 32-entries.
 *
 * Queue occupancy is tracked by a Head & a Tail pointer. Tail pointer
 * indicates the location to which next entry will be written & Head
 * pointer indicates the location from which next entry will be read. When
 * these pointers reach the top of the allocated space (indicated by the
 * End pointer), they are reset to the bottom of the allocated space
 * (indicated by the Start pointer).
 *
 * Output queue pointer information:
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *   14               10 9              5 4                 0
 *   ------------------
 *   | base ptr       |
 *   ------------------
 *                       ----------------
 *                       | start ptr    |
 *                       ----------------
 *                       ----------------
 *                       | end   ptr    |
 *                       ----------------
 *                       ------------------------------------
 *                       |           head ptr               |
 *                       ------------------------------------
 *                       ------------------------------------
 *                       |           tail ptr               |
 *                       ------------------------------------
 * Note:
 * A total of 1024 segments can sit on one software-visible "bank"
 * of internal SRAM. Each segment contains 32 entries. Also note
 * that sw-visible "banks" are not the same as the actual internal
 * 8-bank implementation of hardware. It is an optimization of
 * internal access.
 *
 */

void nlm_cms_setup_credits(uint64_t base, int destid, int srcid, int credit)
{
	uint64_t val;

	val = (((uint64_t)credit << 24) | (destid << 12) | (srcid << 0));
	nlm_write_cms_reg(base, CMS_OUTPUTQ_CREDIT_CFG, val);

}

/*
 * base		- CMS module base address for this node.
 * qid		- is the output queue id otherwise called as vc id
 * spill_base   - is the 40-bit physical address of spill memory. Must be
		  4KB aligned.
 * nsegs	- No of segments where a "1" indicates 4KB. Spill size must be
 *                a multiple of 4KB.
 */
int nlm_cms_alloc_spill_q(uint64_t base, int qid, uint64_t spill_base,
				int nsegs)
{
	uint64_t queue_config;
	uint32_t spill_start;

	if (nsegs > CMS_MAX_SPILL_SEGMENTS_PER_QUEUE) {
		return 1;
	}

	queue_config = nlm_read_cms_reg(base,(CMS_OUTPUTQ_CONFIG(qid)));

	spill_start = ((spill_base >> 12) & 0x3F);
	/* Spill configuration */
	queue_config = (((uint64_t)CMS_SPILL_ENA << 62) |
				(((spill_base >> 18) & 0x3FFFFF) << 27) |
				(spill_start + nsegs - 1) << 21 |
				(spill_start << 15));

	nlm_write_cms_reg(base,(CMS_OUTPUTQ_CONFIG(qid)),queue_config);

	return 0;
}

uint64_t nlm_cms_get_onchip_queue (uint64_t base, int qid)
{
	return nlm_read_cms_reg(base, CMS_OUTPUTQ_CONFIG(qid));
}

void nlm_cms_set_onchip_queue (uint64_t base, int qid, uint64_t val)
{
	uint64_t rdval;

	rdval = nlm_read_cms_reg(base, CMS_OUTPUTQ_CONFIG(qid));
	rdval |= val;
	nlm_write_cms_reg(base, CMS_OUTPUTQ_CONFIG(qid), rdval);
}

void nlm_cms_per_queue_level_intr(uint64_t base, int qid, int sub_type,
					int intr_val)
{
	uint64_t val;

	val = nlm_read_cms_reg(base, CMS_OUTPUTQ_CONFIG(qid));

	val &= ~((0x7ULL << 56) | (0x3ULL << 54));

	val |= (((uint64_t)sub_type<<54) |
		((uint64_t)intr_val<<56));

	nlm_write_cms_reg(base, CMS_OUTPUTQ_CONFIG(qid), val);
}

void nlm_cms_per_queue_timer_intr(uint64_t base, int qid, int sub_type,
					int intr_val)
{
	uint64_t val;

	val = nlm_read_cms_reg(base, CMS_OUTPUTQ_CONFIG(qid));

	val &= ~((0x7ULL << 51) | (0x3ULL << 49));

	val |= (((uint64_t)sub_type<<49) |
		((uint64_t)intr_val<<51));

	nlm_write_cms_reg(base, CMS_OUTPUTQ_CONFIG(qid), val);
}

/* returns 1 if interrupt has been generated for this output queue */
int nlm_cms_outputq_intr_check(uint64_t base, int qid)
{
	uint64_t val;
	val = nlm_read_cms_reg(base, CMS_OUTPUTQ_CONFIG(qid));

	return ((val >> 59) & 0x1);
}

void nlm_cms_outputq_clr_intr(uint64_t base, int qid)
{
	uint64_t val;
	val = nlm_read_cms_reg(base, CMS_OUTPUTQ_CONFIG(qid));
	val |= (1ULL<<59);
	nlm_write_cms_reg(base, CMS_OUTPUTQ_CONFIG(qid), val);
}

void nlm_cms_illegal_dst_error_intr(uint64_t base, int en)
{
	uint64_t val;

	val = nlm_read_cms_reg(base, CMS_MSG_CONFIG);
	val |= (en<<8);
	nlm_write_cms_reg(base, CMS_MSG_CONFIG, val);
}

void nlm_cms_timeout_error_intr(uint64_t base, int en)
{
	uint64_t val;

	val = nlm_read_cms_reg(base, CMS_MSG_CONFIG);
	val |= (en<<7);
	nlm_write_cms_reg(base, CMS_MSG_CONFIG, val);
}

void nlm_cms_biu_error_resp_intr(uint64_t base, int en)
{
	uint64_t val;

	val = nlm_read_cms_reg(base, CMS_MSG_CONFIG);
	val |= (en<<6);
	nlm_write_cms_reg(base, CMS_MSG_CONFIG, val);
}

void nlm_cms_spill_uncorrectable_ecc_error_intr(uint64_t base, int en)
{
	uint64_t val;

	val = nlm_read_cms_reg(base, CMS_MSG_CONFIG);
	val |= (en<<5) | (en<<3);
	nlm_write_cms_reg(base, CMS_MSG_CONFIG, val);
}

void nlm_cms_spill_correctable_ecc_error_intr(uint64_t base, int en)
{
	uint64_t val;

	val = nlm_read_cms_reg(base, CMS_MSG_CONFIG);
	val |= (en<<4) | (en<<2);
	nlm_write_cms_reg(base, CMS_MSG_CONFIG, val);
}

void nlm_cms_outputq_uncorrectable_ecc_error_intr(uint64_t base, int en)
{
	uint64_t val;

	val = nlm_read_cms_reg(base, CMS_MSG_CONFIG);
	val |= (en<<1);
	nlm_write_cms_reg(base, CMS_MSG_CONFIG, val);
}

void nlm_cms_outputq_correctable_ecc_error_intr(uint64_t base, int en)
{
	uint64_t val;

	val = nlm_read_cms_reg(base, CMS_MSG_CONFIG);
	val |= (en<<0);
	nlm_write_cms_reg(base, CMS_MSG_CONFIG, val);
}

uint64_t nlm_cms_network_error_status(uint64_t base)
{
	return nlm_read_cms_reg(base, CMS_MSG_ERR);
}

int nlm_cms_get_net_error_code(uint64_t err)
{
	return ((err >> 12) & 0xf);
}

int nlm_cms_get_net_error_syndrome(uint64_t err)
{
	return ((err >> 32) & 0x1ff);
}

int nlm_cms_get_net_error_ramindex(uint64_t err)
{
	return ((err >> 44) & 0x7fff);
}

int nlm_cms_get_net_error_outputq(uint64_t err)
{
	return ((err >> 16) & 0xfff);
}

/*========================= FMN Tracing related APIs ================*/

void nlm_cms_trace_setup(uint64_t base, int en, uint64_t trace_base,
				uint64_t trace_limit, int match_dstid_en,
				int dst_id, int match_srcid_en, int src_id,
				int wrap)
{
	uint64_t val;

	nlm_write_cms_reg(base, CMS_TRACE_BASE_ADDR, trace_base);
	nlm_write_cms_reg(base, CMS_TRACE_LIMIT_ADDR, trace_limit);

	val = nlm_read_cms_reg(base, CMS_TRACE_CONFIG);
	val |= (((uint64_t)match_dstid_en << 39) |
		((dst_id & 0xfff) << 24) |
		(match_srcid_en << 23) |
		((src_id & 0xfff) << 8) |
		(wrap << 1) |
		(en << 0));
	nlm_write_cms_reg(base, CMS_MSG_CONFIG, val);
}

void nlm_cms_endian_byte_swap (uint64_t base, int en)
{
	nlm_write_cms_reg(base, CMS_MSG_ENDIAN_SWAP, en);
}