mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-19 03:08:31 +00:00
ae5cbc43b3
As on some incipient Layerscape platforms (LS1043A series) there isn't
separate PF control register block, these registers reside in the LUT
register block, so when the driver detected there isn't 'ctrl', it will
assign the 'lut' address to the ls_pcie->ctrl.
The current code allocate memory for the struct ls_pcie with random
contents, this can result in skipping to assign the ls_pcie->ctrl with
the 'lut' address, then further crash with the incorrect address.
Fixes: 118e58e26e
("pci: layerscape: Split the EP and RC driver")
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
337 lines
8.9 KiB
C
337 lines
8.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright 2020 NXP
|
|
* Layerscape PCIe EP driver
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/arch/fsl_serdes.h>
|
|
#include <dm.h>
|
|
#include <asm/global_data.h>
|
|
#include <dm/devres.h>
|
|
#include <errno.h>
|
|
#include <pci_ep.h>
|
|
#include <asm/io.h>
|
|
#include <linux/sizes.h>
|
|
#include <linux/log2.h>
|
|
#include "pcie_layerscape.h"
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static void ls_pcie_ep_enable_cfg(struct ls_pcie_ep *pcie_ep)
|
|
{
|
|
struct ls_pcie *pcie = pcie_ep->pcie;
|
|
u32 config;
|
|
|
|
config = ctrl_readl(pcie, PCIE_PF_CONFIG);
|
|
config |= PCIE_CONFIG_READY;
|
|
ctrl_writel(pcie, config, PCIE_PF_CONFIG);
|
|
}
|
|
|
|
static int ls_ep_set_bar(struct udevice *dev, uint fn, struct pci_bar *ep_bar)
|
|
{
|
|
struct ls_pcie_ep *pcie_ep = dev_get_priv(dev);
|
|
struct ls_pcie *pcie = pcie_ep->pcie;
|
|
dma_addr_t bar_phys = ep_bar->phys_addr;
|
|
enum pci_barno bar = ep_bar->barno;
|
|
u32 reg = PCI_BASE_ADDRESS_0 + (4 * bar);
|
|
int flags = ep_bar->flags;
|
|
int type, idx;
|
|
u64 size;
|
|
|
|
idx = bar;
|
|
/* BAR size is 2^(aperture + 11) */
|
|
size = max_t(size_t, ep_bar->size, FSL_PCIE_EP_MIN_APERTURE);
|
|
|
|
if (!(flags & PCI_BASE_ADDRESS_SPACE))
|
|
type = PCIE_ATU_TYPE_MEM;
|
|
else
|
|
type = PCIE_ATU_TYPE_IO;
|
|
|
|
ls_pcie_atu_inbound_set(pcie, fn, 0, type, idx, bar, bar_phys);
|
|
|
|
dbi_writel(pcie, lower_32_bits(size - 1), reg + PCIE_NO_SRIOV_BAR_BASE);
|
|
dbi_writel(pcie, flags, reg);
|
|
|
|
if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) {
|
|
dbi_writel(pcie, upper_32_bits(size - 1),
|
|
reg + 4 + PCIE_NO_SRIOV_BAR_BASE);
|
|
dbi_writel(pcie, 0, reg + 4);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct pci_ep_ops ls_pcie_ep_ops = {
|
|
.set_bar = ls_ep_set_bar,
|
|
};
|
|
|
|
static void ls_pcie_ep_setup_atu(struct ls_pcie_ep *pcie_ep, u32 pf)
|
|
{
|
|
struct ls_pcie *pcie = pcie_ep->pcie;
|
|
u32 vf_flag = 0;
|
|
u64 phys = 0;
|
|
|
|
phys = CONFIG_SYS_PCI_EP_MEMORY_BASE + pf * SZ_64M;
|
|
|
|
phys = ALIGN(phys, PCIE_BAR0_SIZE);
|
|
/* ATU 0 : INBOUND : map BAR0 */
|
|
ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
|
|
0 + pf * BAR_NUM, 0, phys);
|
|
/* ATU 1 : INBOUND : map BAR1 */
|
|
phys = ALIGN(phys + PCIE_BAR0_SIZE, PCIE_BAR1_SIZE);
|
|
ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
|
|
1 + pf * BAR_NUM, 1, phys);
|
|
/* ATU 2 : INBOUND : map BAR2 */
|
|
phys = ALIGN(phys + PCIE_BAR1_SIZE, PCIE_BAR2_SIZE);
|
|
ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
|
|
2 + pf * BAR_NUM, 2, phys);
|
|
/* ATU 3 : INBOUND : map BAR2 */
|
|
phys = ALIGN(phys + PCIE_BAR2_SIZE, PCIE_BAR4_SIZE);
|
|
ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
|
|
3 + pf * BAR_NUM, 4, phys);
|
|
|
|
if (pcie_ep->sriov_flag) {
|
|
vf_flag = 1;
|
|
/* ATU 4 : INBOUND : map BAR0 */
|
|
phys = ALIGN(phys + PCIE_BAR4_SIZE, PCIE_BAR0_SIZE);
|
|
ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
|
|
4 + pf * BAR_NUM, 0, phys);
|
|
/* ATU 5 : INBOUND : map BAR1 */
|
|
phys = ALIGN(phys + PCIE_BAR0_SIZE * PCIE_VF_NUM,
|
|
PCIE_BAR1_SIZE);
|
|
ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
|
|
5 + pf * BAR_NUM, 1, phys);
|
|
/* ATU 6 : INBOUND : map BAR2 */
|
|
phys = ALIGN(phys + PCIE_BAR1_SIZE * PCIE_VF_NUM,
|
|
PCIE_BAR2_SIZE);
|
|
ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
|
|
6 + pf * BAR_NUM, 2, phys);
|
|
/* ATU 7 : INBOUND : map BAR4 */
|
|
phys = ALIGN(phys + PCIE_BAR2_SIZE * PCIE_VF_NUM,
|
|
PCIE_BAR4_SIZE);
|
|
ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
|
|
7 + pf * BAR_NUM, 4, phys);
|
|
}
|
|
|
|
/* ATU: OUTBOUND : map MEM */
|
|
ls_pcie_atu_outbound_set(pcie, pf, PCIE_ATU_TYPE_MEM,
|
|
(u64)pcie_ep->addr_res.start +
|
|
pf * CONFIG_SYS_PCI_MEMORY_SIZE,
|
|
0, CONFIG_SYS_PCI_MEMORY_SIZE);
|
|
}
|
|
|
|
/* BAR0 and BAR1 are 32bit BAR2 and BAR4 are 64bit */
|
|
static void ls_pcie_ep_setup_bar(void *bar_base, int bar, u32 size)
|
|
{
|
|
u32 mask;
|
|
|
|
/* The least inbound window is 4KiB */
|
|
if (size < SZ_4K)
|
|
mask = 0;
|
|
else
|
|
mask = size - 1;
|
|
|
|
switch (bar) {
|
|
case 0:
|
|
writel(mask, bar_base + PCI_BASE_ADDRESS_0);
|
|
break;
|
|
case 1:
|
|
writel(mask, bar_base + PCI_BASE_ADDRESS_1);
|
|
break;
|
|
case 2:
|
|
writel(mask, bar_base + PCI_BASE_ADDRESS_2);
|
|
writel(0, bar_base + PCI_BASE_ADDRESS_3);
|
|
break;
|
|
case 4:
|
|
writel(mask, bar_base + PCI_BASE_ADDRESS_4);
|
|
writel(0, bar_base + PCI_BASE_ADDRESS_5);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void ls_pcie_ep_setup_bars(void *bar_base)
|
|
{
|
|
/* BAR0 - 32bit - MEM */
|
|
ls_pcie_ep_setup_bar(bar_base, 0, PCIE_BAR0_SIZE);
|
|
/* BAR1 - 32bit - MEM*/
|
|
ls_pcie_ep_setup_bar(bar_base, 1, PCIE_BAR1_SIZE);
|
|
/* BAR2 - 64bit - MEM */
|
|
ls_pcie_ep_setup_bar(bar_base, 2, PCIE_BAR2_SIZE);
|
|
/* BAR4 - 64bit - MEM */
|
|
ls_pcie_ep_setup_bar(bar_base, 4, PCIE_BAR4_SIZE);
|
|
}
|
|
|
|
static void ls_pcie_ep_setup_vf_bars(void *bar_base)
|
|
{
|
|
/* VF BAR0 MASK register at offset 0x19c*/
|
|
bar_base += PCIE_SRIOV_VFBAR0 - PCI_BASE_ADDRESS_0;
|
|
|
|
/* VF-BAR0 - 32bit - MEM */
|
|
ls_pcie_ep_setup_bar(bar_base, 0, PCIE_BAR0_SIZE);
|
|
/* VF-BAR1 - 32bit - MEM*/
|
|
ls_pcie_ep_setup_bar(bar_base, 1, PCIE_BAR1_SIZE);
|
|
/* VF-BAR2 - 64bit - MEM */
|
|
ls_pcie_ep_setup_bar(bar_base, 2, PCIE_BAR2_SIZE);
|
|
/* VF-BAR4 - 64bit - MEM */
|
|
ls_pcie_ep_setup_bar(bar_base, 4, PCIE_BAR4_SIZE);
|
|
}
|
|
|
|
static void ls_pcie_setup_ep(struct ls_pcie_ep *pcie_ep)
|
|
{
|
|
u32 sriov;
|
|
u32 pf, vf;
|
|
void *bar_base = NULL;
|
|
struct ls_pcie *pcie = pcie_ep->pcie;
|
|
|
|
sriov = readl(pcie->dbi + PCIE_SRIOV);
|
|
if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV) {
|
|
pcie_ep->sriov_flag = 1;
|
|
for (pf = 0; pf < PCIE_PF_NUM; pf++) {
|
|
/*
|
|
* The VF_BARn_REG register's Prefetchable and Type bit
|
|
* fields are overwritten by a write to VF's BAR Mask
|
|
* register. Before writing to the VF_BARn_MASK_REG
|
|
* register, write 0b to the PCIE_MISC_CONTROL_1_OFF
|
|
* register.
|
|
*/
|
|
writel(0, pcie->dbi + PCIE_MISC_CONTROL_1_OFF);
|
|
|
|
bar_base = pcie->dbi +
|
|
PCIE_MASK_OFFSET(pcie_ep->cfg2_flag, pf,
|
|
pcie_ep->pf1_offset);
|
|
|
|
if (pcie_ep->cfg2_flag) {
|
|
ctrl_writel(pcie,
|
|
PCIE_LCTRL0_VAL(pf, 0),
|
|
PCIE_PF_VF_CTRL);
|
|
ls_pcie_ep_setup_bars(bar_base);
|
|
|
|
for (vf = 1; vf <= PCIE_VF_NUM; vf++) {
|
|
ctrl_writel(pcie,
|
|
PCIE_LCTRL0_VAL(pf, vf),
|
|
PCIE_PF_VF_CTRL);
|
|
ls_pcie_ep_setup_vf_bars(bar_base);
|
|
}
|
|
} else {
|
|
ls_pcie_ep_setup_bars(bar_base);
|
|
ls_pcie_ep_setup_vf_bars(bar_base);
|
|
}
|
|
|
|
ls_pcie_ep_setup_atu(pcie_ep, pf);
|
|
}
|
|
|
|
if (pcie_ep->cfg2_flag) /* Disable CFG2 */
|
|
ctrl_writel(pcie, 0, PCIE_PF_VF_CTRL);
|
|
} else {
|
|
ls_pcie_ep_setup_bars(pcie->dbi + PCIE_NO_SRIOV_BAR_BASE);
|
|
ls_pcie_ep_setup_atu(pcie_ep, 0);
|
|
}
|
|
|
|
ls_pcie_dump_atu(pcie, PCIE_ATU_REGION_NUM_SRIOV,
|
|
PCIE_ATU_REGION_INBOUND);
|
|
|
|
ls_pcie_ep_enable_cfg(pcie_ep);
|
|
}
|
|
|
|
static int ls_pcie_ep_probe(struct udevice *dev)
|
|
{
|
|
struct ls_pcie_ep *pcie_ep = dev_get_priv(dev);
|
|
struct ls_pcie *pcie;
|
|
u16 link_sta;
|
|
int ret;
|
|
u32 svr;
|
|
|
|
pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
|
|
if (!pcie)
|
|
return -ENOMEM;
|
|
|
|
pcie_ep->pcie = pcie;
|
|
|
|
pcie->dbi = (void __iomem *)devfdt_get_addr_index(dev, 0);
|
|
if (!pcie->dbi)
|
|
return -ENOMEM;
|
|
|
|
pcie->ctrl = (void __iomem *)devfdt_get_addr_index(dev, 1);
|
|
if (!pcie->ctrl)
|
|
return -ENOMEM;
|
|
|
|
ret = fdt_get_named_resource(gd->fdt_blob, dev_of_offset(dev),
|
|
"reg", "reg-names",
|
|
"addr_space", &pcie_ep->addr_res);
|
|
if (ret) {
|
|
printf("%s: resource \"addr_space\" not found\n", dev->name);
|
|
return ret;
|
|
}
|
|
|
|
pcie->idx = ((unsigned long)pcie->dbi - PCIE_SYS_BASE_ADDR) /
|
|
PCIE_CCSR_SIZE;
|
|
|
|
pcie->big_endian = fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
|
|
"big-endian");
|
|
|
|
svr = SVR_SOC_VER(get_svr());
|
|
|
|
if (svr == SVR_LX2160A || svr == SVR_LX2162A ||
|
|
svr == SVR_LX2120A || svr == SVR_LX2080A ||
|
|
svr == SVR_LX2122A || svr == SVR_LX2082A)
|
|
pcie_ep->pf1_offset = LX2160_PCIE_PF1_OFFSET;
|
|
else
|
|
pcie_ep->pf1_offset = LS_PCIE_PF1_OFFSET;
|
|
|
|
if (svr == SVR_LS2080A || svr == SVR_LS2085A)
|
|
pcie_ep->cfg2_flag = 1;
|
|
else
|
|
pcie_ep->cfg2_flag = 0;
|
|
|
|
pcie->mode = readb(pcie->dbi + PCI_HEADER_TYPE) & 0x7f;
|
|
if (pcie->mode != PCI_HEADER_TYPE_NORMAL)
|
|
return 0;
|
|
|
|
pcie_ep->max_functions = fdtdec_get_int(gd->fdt_blob,
|
|
dev_of_offset(dev),
|
|
"max-functions", 1);
|
|
pcie_ep->num_ib_wins = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
|
|
"num-ib-windows", 8);
|
|
pcie_ep->num_ob_wins = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
|
|
"num-ob-windows", 8);
|
|
|
|
printf("PCIe%u: %s %s", PCIE_SRDS_PRTCL(pcie->idx), dev->name,
|
|
"Endpoint");
|
|
ls_pcie_setup_ep(pcie_ep);
|
|
|
|
if (!ls_pcie_link_up(pcie)) {
|
|
/* Let the user know there's no PCIe link */
|
|
printf(": no link\n");
|
|
return 0;
|
|
}
|
|
|
|
/* Print the negotiated PCIe link width */
|
|
link_sta = readw(pcie->dbi + PCIE_LINK_STA);
|
|
printf(": x%d gen%d\n", (link_sta & PCIE_LINK_WIDTH_MASK) >> 4,
|
|
link_sta & PCIE_LINK_SPEED_MASK);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ls_pcie_ep_remove(struct udevice *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
const struct udevice_id ls_pcie_ep_ids[] = {
|
|
{ .compatible = "fsl,ls-pcie-ep" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(pci_layerscape_ep) = {
|
|
.name = "pci_layerscape_ep",
|
|
.id = UCLASS_PCI_EP,
|
|
.of_match = ls_pcie_ep_ids,
|
|
.ops = &ls_pcie_ep_ops,
|
|
.probe = ls_pcie_ep_probe,
|
|
.remove = ls_pcie_ep_remove,
|
|
.priv_auto = sizeof(struct ls_pcie_ep),
|
|
};
|