mirror of https://gitee.com/openkylin/linux.git
203 lines
7.2 KiB
C
203 lines
7.2 KiB
C
/***********************license start************************************
|
|
* Copyright (c) 2003-2017 Cavium, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* License: one of 'Cavium License' or 'GNU General Public License Version 2'
|
|
*
|
|
* This file is provided under the terms of the Cavium License (see below)
|
|
* or under the terms of GNU General Public License, Version 2, as
|
|
* published by the Free Software Foundation. When using or redistributing
|
|
* this file, you may do so under either license.
|
|
*
|
|
* Cavium License: 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 "common.h"
|
|
#include "zip_deflate.h"
|
|
|
|
/**
|
|
* zip_cmd_queue_consumed - Calculates the space consumed in the command queue.
|
|
*
|
|
* @zip_dev: Pointer to zip device structure
|
|
* @queue: Queue number
|
|
*
|
|
* Return: Bytes consumed in the command queue buffer.
|
|
*/
|
|
static inline u32 zip_cmd_queue_consumed(struct zip_device *zip_dev, int queue)
|
|
{
|
|
return ((zip_dev->iq[queue].sw_head - zip_dev->iq[queue].sw_tail) *
|
|
sizeof(u64 *));
|
|
}
|
|
|
|
/**
|
|
* zip_load_instr - Submits the instruction into the ZIP command queue
|
|
* @instr: Pointer to the instruction to be submitted
|
|
* @zip_dev: Pointer to ZIP device structure to which the instruction is to
|
|
* be submitted
|
|
*
|
|
* This function copies the ZIP instruction to the command queue and rings the
|
|
* doorbell to notify the engine of the instruction submission. The command
|
|
* queue is maintained in a circular fashion. When there is space for exactly
|
|
* one instruction in the queue, next chunk pointer of the queue is made to
|
|
* point to the head of the queue, thus maintaining a circular queue.
|
|
*
|
|
* Return: Queue number to which the instruction was submitted
|
|
*/
|
|
u32 zip_load_instr(union zip_inst_s *instr,
|
|
struct zip_device *zip_dev)
|
|
{
|
|
union zip_quex_doorbell dbell;
|
|
u32 queue = 0;
|
|
u32 consumed = 0;
|
|
u64 *ncb_ptr = NULL;
|
|
union zip_nptr_s ncp;
|
|
|
|
/*
|
|
* Distribute the instructions between the enabled queues based on
|
|
* the CPU id.
|
|
*/
|
|
if (raw_smp_processor_id() % 2 == 0)
|
|
queue = 0;
|
|
else
|
|
queue = 1;
|
|
|
|
zip_dbg("CPU Core: %d Queue number:%d", raw_smp_processor_id(), queue);
|
|
|
|
/* Take cmd buffer lock */
|
|
spin_lock(&zip_dev->iq[queue].lock);
|
|
|
|
/*
|
|
* Command Queue implementation
|
|
* 1. If there is place for new instructions, push the cmd at sw_head.
|
|
* 2. If there is place for exactly one instruction, push the new cmd
|
|
* at the sw_head. Make sw_head point to the sw_tail to make it
|
|
* circular. Write sw_head's physical address to the "Next-Chunk
|
|
* Buffer Ptr" to make it cmd_hw_tail.
|
|
* 3. Ring the door bell.
|
|
*/
|
|
zip_dbg("sw_head : %lx", zip_dev->iq[queue].sw_head);
|
|
zip_dbg("sw_tail : %lx", zip_dev->iq[queue].sw_tail);
|
|
|
|
consumed = zip_cmd_queue_consumed(zip_dev, queue);
|
|
/* Check if there is space to push just one cmd */
|
|
if ((consumed + 128) == (ZIP_CMD_QBUF_SIZE - 8)) {
|
|
zip_dbg("Cmd queue space available for single command");
|
|
/* Space for one cmd, pust it and make it circular queue */
|
|
memcpy((u8 *)zip_dev->iq[queue].sw_head, (u8 *)instr,
|
|
sizeof(union zip_inst_s));
|
|
zip_dev->iq[queue].sw_head += 16; /* 16 64_bit words = 128B */
|
|
|
|
/* Now, point the "Next-Chunk Buffer Ptr" to sw_head */
|
|
ncb_ptr = zip_dev->iq[queue].sw_head;
|
|
|
|
zip_dbg("ncb addr :0x%lx sw_head addr :0x%lx",
|
|
ncb_ptr, zip_dev->iq[queue].sw_head - 16);
|
|
|
|
/* Using Circular command queue */
|
|
zip_dev->iq[queue].sw_head = zip_dev->iq[queue].sw_tail;
|
|
/* Mark this buffer for free */
|
|
zip_dev->iq[queue].free_flag = 1;
|
|
|
|
/* Write new chunk buffer address at "Next-Chunk Buffer Ptr" */
|
|
ncp.u_reg64 = 0ull;
|
|
ncp.s.addr = __pa(zip_dev->iq[queue].sw_head);
|
|
*ncb_ptr = ncp.u_reg64;
|
|
zip_dbg("*ncb_ptr :0x%lx sw_head[phys] :0x%lx",
|
|
*ncb_ptr, __pa(zip_dev->iq[queue].sw_head));
|
|
|
|
zip_dev->iq[queue].pend_cnt++;
|
|
|
|
} else {
|
|
zip_dbg("Enough space is available for commands");
|
|
/* Push this cmd to cmd queue buffer */
|
|
memcpy((u8 *)zip_dev->iq[queue].sw_head, (u8 *)instr,
|
|
sizeof(union zip_inst_s));
|
|
zip_dev->iq[queue].sw_head += 16; /* 16 64_bit words = 128B */
|
|
|
|
zip_dev->iq[queue].pend_cnt++;
|
|
}
|
|
zip_dbg("sw_head :0x%lx sw_tail :0x%lx hw_tail :0x%lx",
|
|
zip_dev->iq[queue].sw_head, zip_dev->iq[queue].sw_tail,
|
|
zip_dev->iq[queue].hw_tail);
|
|
|
|
zip_dbg(" Pushed the new cmd : pend_cnt : %d",
|
|
zip_dev->iq[queue].pend_cnt);
|
|
|
|
/* Ring the doorbell */
|
|
dbell.u_reg64 = 0ull;
|
|
dbell.s.dbell_cnt = 1;
|
|
zip_reg_write(dbell.u_reg64,
|
|
(zip_dev->reg_base + ZIP_QUEX_DOORBELL(queue)));
|
|
|
|
/* Unlock cmd buffer lock */
|
|
spin_unlock(&zip_dev->iq[queue].lock);
|
|
|
|
return queue;
|
|
}
|
|
|
|
/**
|
|
* zip_update_cmd_bufs - Updates the queue statistics after posting the
|
|
* instruction
|
|
* @zip_dev: Pointer to zip device structure
|
|
* @queue: Queue number
|
|
*/
|
|
void zip_update_cmd_bufs(struct zip_device *zip_dev, u32 queue)
|
|
{
|
|
/* Take cmd buffer lock */
|
|
spin_lock(&zip_dev->iq[queue].lock);
|
|
|
|
/* Check if the previous buffer can be freed */
|
|
if (zip_dev->iq[queue].free_flag == 1) {
|
|
zip_dbg("Free flag. Free cmd buffer, adjust sw head and tail");
|
|
/* Reset the free flag */
|
|
zip_dev->iq[queue].free_flag = 0;
|
|
|
|
/* Point the hw_tail to start of the new chunk buffer */
|
|
zip_dev->iq[queue].hw_tail = zip_dev->iq[queue].sw_head;
|
|
} else {
|
|
zip_dbg("Free flag not set. increment hw tail");
|
|
zip_dev->iq[queue].hw_tail += 16; /* 16 64_bit words = 128B */
|
|
}
|
|
|
|
zip_dev->iq[queue].done_cnt++;
|
|
zip_dev->iq[queue].pend_cnt--;
|
|
|
|
zip_dbg("sw_head :0x%lx sw_tail :0x%lx hw_tail :0x%lx",
|
|
zip_dev->iq[queue].sw_head, zip_dev->iq[queue].sw_tail,
|
|
zip_dev->iq[queue].hw_tail);
|
|
zip_dbg(" Got CC : pend_cnt : %d\n", zip_dev->iq[queue].pend_cnt);
|
|
|
|
spin_unlock(&zip_dev->iq[queue].lock);
|
|
}
|