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Merge branch 'pci/tegra'
- Add MCFG quirks for Tegra194 ECAM errata (Vidya Sagar) * pci/tegra: PCI: tegra: Add Tegra194 MCFG quirks for ECAM errata
2 parents a147995 + 7f10074 commit 882862a

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4 files changed

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4 files changed

+111
-1
lines changed

drivers/acpi/pci_mcfg.c

Lines changed: 7 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -116,6 +116,13 @@ static struct mcfg_fixup mcfg_quirks[] = {
116116
THUNDER_ECAM_QUIRK(2, 12),
117117
THUNDER_ECAM_QUIRK(2, 13),
118118

119+
{ "NVIDIA", "TEGRA194", 1, 0, MCFG_BUS_ANY, &tegra194_pcie_ops},
120+
{ "NVIDIA", "TEGRA194", 1, 1, MCFG_BUS_ANY, &tegra194_pcie_ops},
121+
{ "NVIDIA", "TEGRA194", 1, 2, MCFG_BUS_ANY, &tegra194_pcie_ops},
122+
{ "NVIDIA", "TEGRA194", 1, 3, MCFG_BUS_ANY, &tegra194_pcie_ops},
123+
{ "NVIDIA", "TEGRA194", 1, 4, MCFG_BUS_ANY, &tegra194_pcie_ops},
124+
{ "NVIDIA", "TEGRA194", 1, 5, MCFG_BUS_ANY, &tegra194_pcie_ops},
125+
119126
#define XGENE_V1_ECAM_MCFG(rev, seg) \
120127
{"APM ", "XGENE ", rev, seg, MCFG_BUS_ANY, \
121128
&xgene_v1_pcie_ecam_ops }

drivers/pci/controller/dwc/Makefile

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -18,7 +18,6 @@ obj-$(CONFIG_PCIE_INTEL_GW) += pcie-intel-gw.o
1818
obj-$(CONFIG_PCIE_KIRIN) += pcie-kirin.o
1919
obj-$(CONFIG_PCIE_HISI_STB) += pcie-histb.o
2020
obj-$(CONFIG_PCI_MESON) += pci-meson.o
21-
obj-$(CONFIG_PCIE_TEGRA194) += pcie-tegra194.o
2221
obj-$(CONFIG_PCIE_UNIPHIER) += pcie-uniphier.o
2322
obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o
2423

@@ -39,5 +38,6 @@ ifdef CONFIG_ACPI
3938
ifdef CONFIG_PCI_QUIRKS
4039
obj-$(CONFIG_ARM64) += pcie-al.o
4140
obj-$(CONFIG_ARM64) += pcie-hisi.o
41+
obj-$(CONFIG_ARM64) += pcie-tegra194.o
4242
endif
4343
endif

drivers/pci/controller/dwc/pcie-tegra194.c

Lines changed: 102 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -22,6 +22,8 @@
2222
#include <linux/of_irq.h>
2323
#include <linux/of_pci.h>
2424
#include <linux/pci.h>
25+
#include <linux/pci-acpi.h>
26+
#include <linux/pci-ecam.h>
2527
#include <linux/phy/phy.h>
2628
#include <linux/pinctrl/consumer.h>
2729
#include <linux/platform_device.h>
@@ -311,6 +313,104 @@ struct tegra_pcie_dw_of_data {
311313
enum dw_pcie_device_mode mode;
312314
};
313315

316+
#if defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS)
317+
struct tegra194_pcie_ecam {
318+
void __iomem *config_base;
319+
void __iomem *iatu_base;
320+
void __iomem *dbi_base;
321+
};
322+
323+
static int tegra194_acpi_init(struct pci_config_window *cfg)
324+
{
325+
struct device *dev = cfg->parent;
326+
struct tegra194_pcie_ecam *pcie_ecam;
327+
328+
pcie_ecam = devm_kzalloc(dev, sizeof(*pcie_ecam), GFP_KERNEL);
329+
if (!pcie_ecam)
330+
return -ENOMEM;
331+
332+
pcie_ecam->config_base = cfg->win;
333+
pcie_ecam->iatu_base = cfg->win + SZ_256K;
334+
pcie_ecam->dbi_base = cfg->win + SZ_512K;
335+
cfg->priv = pcie_ecam;
336+
337+
return 0;
338+
}
339+
340+
static void atu_reg_write(struct tegra194_pcie_ecam *pcie_ecam, int index,
341+
u32 val, u32 reg)
342+
{
343+
u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index);
344+
345+
writel(val, pcie_ecam->iatu_base + offset + reg);
346+
}
347+
348+
static void program_outbound_atu(struct tegra194_pcie_ecam *pcie_ecam,
349+
int index, int type, u64 cpu_addr,
350+
u64 pci_addr, u64 size)
351+
{
352+
atu_reg_write(pcie_ecam, index, lower_32_bits(cpu_addr),
353+
PCIE_ATU_LOWER_BASE);
354+
atu_reg_write(pcie_ecam, index, upper_32_bits(cpu_addr),
355+
PCIE_ATU_UPPER_BASE);
356+
atu_reg_write(pcie_ecam, index, lower_32_bits(pci_addr),
357+
PCIE_ATU_LOWER_TARGET);
358+
atu_reg_write(pcie_ecam, index, lower_32_bits(cpu_addr + size - 1),
359+
PCIE_ATU_LIMIT);
360+
atu_reg_write(pcie_ecam, index, upper_32_bits(pci_addr),
361+
PCIE_ATU_UPPER_TARGET);
362+
atu_reg_write(pcie_ecam, index, type, PCIE_ATU_CR1);
363+
atu_reg_write(pcie_ecam, index, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
364+
}
365+
366+
static void __iomem *tegra194_map_bus(struct pci_bus *bus,
367+
unsigned int devfn, int where)
368+
{
369+
struct pci_config_window *cfg = bus->sysdata;
370+
struct tegra194_pcie_ecam *pcie_ecam = cfg->priv;
371+
u32 busdev;
372+
int type;
373+
374+
if (bus->number < cfg->busr.start || bus->number > cfg->busr.end)
375+
return NULL;
376+
377+
if (bus->number == cfg->busr.start) {
378+
if (PCI_SLOT(devfn) == 0)
379+
return pcie_ecam->dbi_base + where;
380+
else
381+
return NULL;
382+
}
383+
384+
busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
385+
PCIE_ATU_FUNC(PCI_FUNC(devfn));
386+
387+
if (bus->parent->number == cfg->busr.start) {
388+
if (PCI_SLOT(devfn) == 0)
389+
type = PCIE_ATU_TYPE_CFG0;
390+
else
391+
return NULL;
392+
} else {
393+
type = PCIE_ATU_TYPE_CFG1;
394+
}
395+
396+
program_outbound_atu(pcie_ecam, 0, type, cfg->res.start, busdev,
397+
SZ_256K);
398+
399+
return pcie_ecam->config_base + where;
400+
}
401+
402+
const struct pci_ecam_ops tegra194_pcie_ops = {
403+
.init = tegra194_acpi_init,
404+
.pci_ops = {
405+
.map_bus = tegra194_map_bus,
406+
.read = pci_generic_config_read,
407+
.write = pci_generic_config_write,
408+
}
409+
};
410+
#endif /* defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS) */
411+
412+
#ifdef CONFIG_PCIE_TEGRA194
413+
314414
static inline struct tegra_pcie_dw *to_tegra_pcie(struct dw_pcie *pci)
315415
{
316416
return container_of(pci, struct tegra_pcie_dw, pci);
@@ -2311,3 +2411,5 @@ MODULE_DEVICE_TABLE(of, tegra_pcie_dw_of_match);
23112411
MODULE_AUTHOR("Vidya Sagar <[email protected]>");
23122412
MODULE_DESCRIPTION("NVIDIA PCIe host controller driver");
23132413
MODULE_LICENSE("GPL v2");
2414+
2415+
#endif /* CONFIG_PCIE_TEGRA194 */

include/linux/pci-ecam.h

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -85,6 +85,7 @@ extern const struct pci_ecam_ops pci_thunder_ecam_ops; /* Cavium ThunderX 1.x */
8585
extern const struct pci_ecam_ops xgene_v1_pcie_ecam_ops; /* APM X-Gene PCIe v1 */
8686
extern const struct pci_ecam_ops xgene_v2_pcie_ecam_ops; /* APM X-Gene PCIe v2.x */
8787
extern const struct pci_ecam_ops al_pcie_ops; /* Amazon Annapurna Labs PCIe */
88+
extern const struct pci_ecam_ops tegra194_pcie_ops; /* Tegra194 PCIe */
8889
#endif
8990

9091
#if IS_ENABLED(CONFIG_PCI_HOST_COMMON)

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