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/* SPDX-License-Identifier: GPL-2.0-only */
#include <amdblocks/data_fabric.h>
#include <amdblocks/pci_devs.h>
#include <console/console.h>
#include <device/pci_ops.h>
#include <soc/data_fabric.h>
#include <soc/pci_devs.h>
#include <types.h>
#include "data_fabric_def.h"
static void data_fabric_set_indirect_address(uint8_t func, uint16_t reg, uint8_t instance_id)
{
uint32_t fabric_indirect_access_reg = DF_IND_CFG_INST_ACC_EN;
/* Register offset field [10:2] in this register corresponds to [10:2] of the
requested offset. */
fabric_indirect_access_reg |= reg & DF_IND_CFG_ACC_REG_MASK;
fabric_indirect_access_reg |=
(func << DF_IND_CFG_ACC_FUN_SHIFT) & DF_IND_CFG_ACC_FUN_MASK;
fabric_indirect_access_reg |= instance_id << DF_IND_CFG_INST_ID_SHIFT;
pci_write_config32(SOC_DF_F4_DEV, DF_FICAA_BIOS, fabric_indirect_access_reg);
}
uint32_t data_fabric_read32(uint8_t function, uint16_t reg, uint8_t instance_id)
{
if (instance_id == BROADCAST_FABRIC_ID)
return data_fabric_broadcast_read32(function, reg);
/* non-broadcast data fabric accesses need to be done via indirect access */
data_fabric_set_indirect_address(function, reg, instance_id);
return pci_read_config32(SOC_DF_F4_DEV, DF_FICAD_LO);
}
void data_fabric_write32(uint8_t function, uint16_t reg, uint8_t instance_id, uint32_t data)
{
if (instance_id == BROADCAST_FABRIC_ID) {
data_fabric_broadcast_write32(function, reg, data);
return;
}
/* non-broadcast data fabric accesses need to be done via indirect access */
data_fabric_set_indirect_address(function, reg, instance_id);
pci_write_config32(SOC_DF_F4_DEV, DF_FICAD_LO, data);
}
void data_fabric_print_mmio_conf(void)
{
printk(BIOS_SPEW,
"=== Data Fabric MMIO configuration registers ===\n"
"Addresses are shifted to the right by 16 bits.\n"
"idx control base limit\n");
for (unsigned int i = 0; i < NUM_NB_MMIO_REGS; i++) {
printk(BIOS_SPEW, " %2u %8x %8x %8x\n",
i,
data_fabric_broadcast_read32(0, NB_MMIO_CONTROL(i)),
data_fabric_broadcast_read32(0, NB_MMIO_BASE(i)),
data_fabric_broadcast_read32(0, NB_MMIO_LIMIT(i)));
}
}
void data_fabric_disable_mmio_reg(unsigned int reg)
{
data_fabric_broadcast_write32(0, NB_MMIO_CONTROL(reg),
IOMS0_FABRIC_ID << MMIO_DST_FABRIC_ID_SHIFT);
data_fabric_broadcast_write32(0, NB_MMIO_BASE(reg), 0);
data_fabric_broadcast_write32(0, NB_MMIO_LIMIT(reg), 0);
}
static bool is_mmio_reg_disabled(unsigned int reg)
{
uint32_t val = data_fabric_broadcast_read32(0, NB_MMIO_CONTROL(reg));
return !(val & (MMIO_WE | MMIO_RE));
}
int data_fabric_find_unused_mmio_reg(void)
{
for (unsigned int i = 0; i < NUM_NB_MMIO_REGS; i++) {
if (is_mmio_reg_disabled(i))
return i;
}
return -1;
}
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