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u-boot/drivers/ddr/marvell/axp/xor.c
Marek Behún e5b3e87dfa ddr: marvell: axp: align signature of mv_xor_mem_init() with a38x 
In arch/arm/mach-mvebu/dram.c we always include axp's xor.h for common
XOR definitions, regardless whether we compile for axp or a38x.

But the declaration of this function has a different signature in axp's
xor.h from the one used in a38x' implementation - one parameter is u64
instead of u32. This can result in wrong argument's being passed to that
function on a38x with no one the wiser.

I discovered this when building U-Boot for Turris Omnia with LTO. The
compiler complains about the different signatures being thrown into the
same linking process:

  axp/xor.h:67:5: warning: type of ‘mv_xor_mem_init’ does not match
                           original declaration [-Wlto-type-mismatch]
   67 | int mv_xor_mem_init(u32 chan, u32 start_ptr, u32 block_size,
      |     ^
  a38x/xor.c:165:5: note: type mismatch in parameter 3
  165 | int mv_xor_mem_init(u32 chan, u32 start_ptr, unsigned long long
      |     ^
  a38x/xor.c:165:5: note: type ‘long long unsigned int’ should match
                          type ‘u32’

Fix this by changing the type of the block_size argument in the axp's
implementation and header file to the one used in a38x (and upstream
mv-ddr-marvell).

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
2021-03-12 07:44:21 +01:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) Marvell International Ltd. and its affiliates
*/
#include <common.h>
#include <i2c.h>
#include <log.h>
#include <spl.h>
#include <asm/io.h>
#include <asm/arch/cpu.h>
#include <asm/arch/soc.h>
#include "xor.h"
#include "xor_regs.h"
static u32 xor_regs_ctrl_backup;
static u32 xor_regs_base_backup[MAX_CS];
static u32 xor_regs_mask_backup[MAX_CS];
static int mv_xor_cmd_set(u32 chan, int command);
static int mv_xor_ctrl_set(u32 chan, u32 xor_ctrl);
void mv_sys_xor_init(MV_DRAM_INFO *dram_info)
{
u32 reg, ui, base, cs_count;
xor_regs_ctrl_backup = reg_read(XOR_WINDOW_CTRL_REG(0, 0));
for (ui = 0; ui < MAX_CS; ui++)
xor_regs_base_backup[ui] = reg_read(XOR_BASE_ADDR_REG(0, ui));
for (ui = 0; ui < MAX_CS; ui++)
xor_regs_mask_backup[ui] = reg_read(XOR_SIZE_MASK_REG(0, ui));
reg = 0;
for (ui = 0; ui < (dram_info->num_cs + 1); ui++) {
/* Enable Window x for each CS */
reg |= (0x1 << (ui));
/* Enable Window x for each CS */
reg |= (0x3 << ((ui * 2) + 16));
}
reg_write(XOR_WINDOW_CTRL_REG(0, 0), reg);
/* Last window - Base - 0x40000000, Attribute 0x1E - SRAM */
base = (SRAM_BASE & 0xFFFF0000) | 0x1E00;
reg_write(XOR_BASE_ADDR_REG(0, dram_info->num_cs), base);
/* Last window - Size - 64 MB */
reg_write(XOR_SIZE_MASK_REG(0, dram_info->num_cs), 0x03FF0000);
cs_count = 0;
for (ui = 0; ui < MAX_CS; ui++) {
if (dram_info->cs_ena & (1 << ui)) {
/*
* Window x - Base - 0x00000000, Attribute 0x0E - DRAM
*/
base = 0;
switch (ui) {
case 0:
base |= 0xE00;
break;
case 1:
base |= 0xD00;
break;
case 2:
base |= 0xB00;
break;
case 3:
base |= 0x700;
break;
}
reg_write(XOR_BASE_ADDR_REG(0, cs_count), base);
/* Window x - Size - 256 MB */
reg_write(XOR_SIZE_MASK_REG(0, cs_count), 0x0FFF0000);
cs_count++;
}
}
mv_xor_hal_init(1);
return;
}
void mv_sys_xor_finish(void)
{
u32 ui;
reg_write(XOR_WINDOW_CTRL_REG(0, 0), xor_regs_ctrl_backup);
for (ui = 0; ui < MAX_CS; ui++)
reg_write(XOR_BASE_ADDR_REG(0, ui), xor_regs_base_backup[ui]);
for (ui = 0; ui < MAX_CS; ui++)
reg_write(XOR_SIZE_MASK_REG(0, ui), xor_regs_mask_backup[ui]);
reg_write(XOR_ADDR_OVRD_REG(0, 0), 0);
}
/*
* mv_xor_hal_init - Initialize XOR engine
*
* DESCRIPTION:
* This function initialize XOR unit.
* INPUT:
* None.
*
* OUTPUT:
* None.
*
* RETURN:
* MV_BAD_PARAM if parameters to function invalid, MV_OK otherwise.
*/
void mv_xor_hal_init(u32 chan_num)
{
u32 i;
/* Abort any XOR activity & set default configuration */
for (i = 0; i < chan_num; i++) {
mv_xor_cmd_set(i, MV_STOP);
mv_xor_ctrl_set(i, (1 << XEXCR_REG_ACC_PROTECT_OFFS) |
(4 << XEXCR_DST_BURST_LIMIT_OFFS) |
(4 << XEXCR_SRC_BURST_LIMIT_OFFS));
}
}
/*
* mv_xor_ctrl_set - Set XOR channel control registers
*
* DESCRIPTION:
*
* INPUT:
*
* OUTPUT:
* None.
*
* RETURN:
* MV_BAD_PARAM if parameters to function invalid, MV_OK otherwise.
* NOTE:
* This function does not modify the OperationMode field of control register.
*
*/
static int mv_xor_ctrl_set(u32 chan, u32 xor_ctrl)
{
u32 val;
/* Update the XOR Engine [0..1] Configuration Registers (XExCR) */
val = reg_read(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)))
& XEXCR_OPERATION_MODE_MASK;
xor_ctrl &= ~XEXCR_OPERATION_MODE_MASK;
xor_ctrl |= val;
reg_write(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)), xor_ctrl);
return MV_OK;
}
int mv_xor_mem_init(u32 chan, u32 start_ptr, unsigned long long block_size,
u32 init_val_high, u32 init_val_low)
{
u32 tmp;
/* Parameter checking */
if (chan >= MV_XOR_MAX_CHAN)
return MV_BAD_PARAM;
if (MV_ACTIVE == mv_xor_state_get(chan))
return MV_BUSY;
if ((block_size < XEXBSR_BLOCK_SIZE_MIN_VALUE) ||
(block_size > XEXBSR_BLOCK_SIZE_MAX_VALUE))
return MV_BAD_PARAM;
/* Set the operation mode to Memory Init */
tmp = reg_read(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)));
tmp &= ~XEXCR_OPERATION_MODE_MASK;
tmp |= XEXCR_OPERATION_MODE_MEM_INIT;
reg_write(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)), tmp);
/*
* Update the start_ptr field in XOR Engine [0..1] Destination Pointer
* Register (XExDPR0)
*/
reg_write(XOR_DST_PTR_REG(XOR_UNIT(chan), XOR_CHAN(chan)), start_ptr);
/*
* Update the BlockSize field in the XOR Engine[0..1] Block Size
* Registers (XExBSR)
*/
reg_write(XOR_BLOCK_SIZE_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
block_size);
/*
* Update the field InitValL in the XOR Engine Initial Value Register
* Low (XEIVRL)
*/
reg_write(XOR_INIT_VAL_LOW_REG(XOR_UNIT(chan)), init_val_low);
/*
* Update the field InitValH in the XOR Engine Initial Value Register
* High (XEIVRH)
*/
reg_write(XOR_INIT_VAL_HIGH_REG(XOR_UNIT(chan)), init_val_high);
/* Start transfer */
reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
XEXACTR_XESTART_MASK);
return MV_OK;
}
/*
* mv_xor_transfer - Transfer data from source to destination on one of
* three modes (XOR,CRC32,DMA)
*
* DESCRIPTION:
* This function initiates XOR channel, according to function parameters,
* in order to perform XOR or CRC32 or DMA transaction.
* To gain maximum performance the user is asked to keep the following
* restrictions:
* 1) Selected engine is available (not busy).
* 1) This module does not take into consideration CPU MMU issues.
* In order for the XOR engine to access the appropreate source
* and destination, address parameters must be given in system
* physical mode.
* 2) This API does not take care of cache coherency issues. The source,
* destination and in case of chain the descriptor list are assumed
* to be cache coherent.
* 4) Parameters validity. For example, does size parameter exceeds
* maximum byte count of descriptor mode (16M or 64K).
*
* INPUT:
* chan - XOR channel number. See MV_XOR_CHANNEL enumerator.
* xor_type - One of three: XOR, CRC32 and DMA operations.
* xor_chain_ptr - address of chain pointer
*
* OUTPUT:
* None.
*
* RETURS:
* MV_BAD_PARAM if parameters to function invalid, MV_OK otherwise.
*
*/
int mv_xor_transfer(u32 chan, int xor_type, u32 xor_chain_ptr)
{
u32 tmp;
/* Parameter checking */
if (chan >= MV_XOR_MAX_CHAN) {
debug("%s: ERR. Invalid chan num %d\n", __func__, chan);
return MV_BAD_PARAM;
}
if (MV_ACTIVE == mv_xor_state_get(chan)) {
debug("%s: ERR. Channel is already active\n", __func__);
return MV_BUSY;
}
if (0x0 == xor_chain_ptr) {
debug("%s: ERR. xor_chain_ptr is NULL pointer\n", __func__);
return MV_BAD_PARAM;
}
/* Read configuration register and mask the operation mode field */
tmp = reg_read(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)));
tmp &= ~XEXCR_OPERATION_MODE_MASK;
switch (xor_type) {
case MV_XOR:
if (0 != (xor_chain_ptr & XEXDPR_DST_PTR_XOR_MASK)) {
debug("%s: ERR. Invalid chain pointer (bits [5:0] must be cleared)\n",
__func__);
return MV_BAD_PARAM;
}
/* Set the operation mode to XOR */
tmp |= XEXCR_OPERATION_MODE_XOR;
break;
case MV_DMA:
if (0 != (xor_chain_ptr & XEXDPR_DST_PTR_DMA_MASK)) {
debug("%s: ERR. Invalid chain pointer (bits [4:0] must be cleared)\n",
__func__);
return MV_BAD_PARAM;
}
/* Set the operation mode to DMA */
tmp |= XEXCR_OPERATION_MODE_DMA;
break;
case MV_CRC32:
if (0 != (xor_chain_ptr & XEXDPR_DST_PTR_CRC_MASK)) {
debug("%s: ERR. Invalid chain pointer (bits [4:0] must be cleared)\n",
__func__);
return MV_BAD_PARAM;
}
/* Set the operation mode to CRC32 */
tmp |= XEXCR_OPERATION_MODE_CRC;
break;
default:
return MV_BAD_PARAM;
}
/* Write the operation mode to the register */
reg_write(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)), tmp);
/*
* Update the NextDescPtr field in the XOR Engine [0..1] Next Descriptor
* Pointer Register (XExNDPR)
*/
reg_write(XOR_NEXT_DESC_PTR_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
xor_chain_ptr);
/* Start transfer */
reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
XEXACTR_XESTART_MASK);
return MV_OK;
}
/*
* mv_xor_state_get - Get XOR channel state.
*
* DESCRIPTION:
* XOR channel activity state can be active, idle, paused.
* This function retrunes the channel activity state.
*
* INPUT:
* chan - the channel number
*
* OUTPUT:
* None.
*
* RETURN:
* XOR_CHANNEL_IDLE - If the engine is idle.
* XOR_CHANNEL_ACTIVE - If the engine is busy.
* XOR_CHANNEL_PAUSED - If the engine is paused.
* MV_UNDEFINED_STATE - If the engine state is undefind or there is no
* such engine
*
*/
int mv_xor_state_get(u32 chan)
{
u32 state;
/* Parameter checking */
if (chan >= MV_XOR_MAX_CHAN) {
debug("%s: ERR. Invalid chan num %d\n", __func__, chan);
return MV_UNDEFINED_STATE;
}
/* Read the current state */
state = reg_read(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)));
state &= XEXACTR_XESTATUS_MASK;
/* Return the state */
switch (state) {
case XEXACTR_XESTATUS_IDLE:
return MV_IDLE;
case XEXACTR_XESTATUS_ACTIVE:
return MV_ACTIVE;
case XEXACTR_XESTATUS_PAUSED:
return MV_PAUSED;
}
return MV_UNDEFINED_STATE;
}
/*
* mv_xor_cmd_set - Set command of XOR channel
*
* DESCRIPTION:
* XOR channel can be started, idle, paused and restarted.
* Paused can be set only if channel is active.
* Start can be set only if channel is idle or paused.
* Restart can be set only if channel is paused.
* Stop can be set only if channel is active.
*
* INPUT:
* chan - The channel number
* command - The command type (start, stop, restart, pause)
*
* OUTPUT:
* None.
*
* RETURN:
* MV_OK on success , MV_BAD_PARAM on erroneous parameter, MV_ERROR on
* undefind XOR engine mode
*
*/
static int mv_xor_cmd_set(u32 chan, int command)
{
int state;
/* Parameter checking */
if (chan >= MV_XOR_MAX_CHAN) {
debug("%s: ERR. Invalid chan num %d\n", __func__, chan);
return MV_BAD_PARAM;
}
/* Get the current state */
state = mv_xor_state_get(chan);
/* Command is start and current state is idle */
if ((command == MV_START) && (state == MV_IDLE)) {
reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
XEXACTR_XESTART_MASK);
return MV_OK;
}
/* Command is stop and current state is active */
else if ((command == MV_STOP) && (state == MV_ACTIVE)) {
reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
XEXACTR_XESTOP_MASK);
return MV_OK;
}
/* Command is paused and current state is active */
else if ((command == MV_PAUSED) && (state == MV_ACTIVE)) {
reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
XEXACTR_XEPAUSE_MASK);
return MV_OK;
}
/* Command is restart and current state is paused */
else if ((command == MV_RESTART) && (state == MV_PAUSED)) {
reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
XEXACTR_XERESTART_MASK);
return MV_OK;
}
/* Command is stop and current state is active */
else if ((command == MV_STOP) && (state == MV_IDLE))
return MV_OK;
/* Illegal command */
debug("%s: ERR. Illegal command\n", __func__);
return MV_BAD_PARAM;
}
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