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soc/amd/picasso/data_fabric: move more helper functions to common code 

The number of data fabric MMIO registers is SoC-specific, so we need to
keep that in the SoC code. This also removes a redundant pair of
brackets and moves a loop counter declaration into the head of the loop.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I8499f1c1f7bf6849b5955a463de2e06962d5de68
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50638
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Felix Held 2021-02-13 21:10:08 +01:00
parent 0a1491366b
commit 602f93ed52
3 changed files with 30 additions and 28 deletions
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24
src/soc/amd/common/block/data_fabric/data_fabric_helper.c
View File

@ -3,6 +3,7 @@
#include <amdblocks/data_fabric.h>
#include <amdblocks/pci_devs.h>
#include <device/pci_ops.h>
#include <soc/data_fabric.h>
#include <soc/pci_devs.h>
#include <types.h>
#include "data_fabric_def.h"
@ -40,3 +41,26 @@ void data_fabric_write32(uint8_t function, uint16_t reg, uint8_t instance_id, ui
data_fabric_set_indirect_address(function, reg, instance_id);
pci_write_config32(SOC_DF_F4_DEV, DF_FICAD_LO, data);
}
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;
}

3
src/soc/amd/common/block/include/amdblocks/data_fabric.h
View File

@ -27,4 +27,7 @@ void data_fabric_broadcast_write32(uint8_t function, uint16_t reg, uint32_t data
pci_write_config32(_SOC_DEV(DF_DEV, function), reg, data);
}
void data_fabric_disable_mmio_reg(unsigned int reg);
int data_fabric_find_unused_mmio_reg(void);
#endif /* AMD_BLOCK_DATA_FABRIC_H */

31
src/soc/amd/picasso/data_fabric.c
View File

@ -11,31 +11,6 @@
#include <soc/iomap.h>
#include <types.h>
static void 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)));
}
static int find_unused_mmio_reg(void)
{
unsigned int i;
for (i = 0; i < NUM_NB_MMIO_REGS; i++) {
if (is_mmio_reg_disabled(i))
return i;
}
return -1;
}
void data_fabric_set_mmio_np(void)
{
/*
@ -77,14 +52,14 @@ void data_fabric_set_mmio_np(void)
continue; /* no overlap at all */
if (base >= np_bot && limit <= np_top) {
disable_mmio_reg(i); /* 100% within, so remove */
data_fabric_disable_mmio_reg(i); /* 100% within, so remove */
continue;
}
if (base < np_bot && limit > np_top) {
/* Split the configured region */
data_fabric_broadcast_write32(0, NB_MMIO_LIMIT(i), np_bot - 1);
reg = find_unused_mmio_reg();
reg = data_fabric_find_unused_mmio_reg();
if (reg < 0) {
/* Although a pair could be freed later, this condition is
* very unusual and deserves analysis. Flag an error and
@ -106,7 +81,7 @@ void data_fabric_set_mmio_np(void)
data_fabric_broadcast_write32(0, NB_MMIO_BASE(i), np_top + 1);
}
reg = find_unused_mmio_reg();
reg = data_fabric_find_unused_mmio_reg();
if (reg < 0) {
printk(BIOS_ERR, "Error: cannot configure region as NP\n");
return;