[PATCH 2/2] acpi: Move MCFG implementation to common lib
Simon Glass
sjg at chromium.org
Mon Feb 7 21:22:32 CET 2022
Hi Moritz,
On Sat, 5 Feb 2022 at 13:17, Moritz Fischer <moritzf at google.com> wrote:
>
> MCFG tables are used on multiple arches. Move to common ACPI lib.
>
> Cc: Simon Glass <sjg at chromium.org>
> Signed-off-by: Moritz Fischer <moritzf at google.com>
> ---
>
> arch/x86/cpu/intel_common/acpi.c | 15 +++++---
> arch/x86/cpu/tangier/acpi.c | 11 ++++--
> arch/x86/include/asm/acpi_table.h | 1 -
> arch/x86/lib/acpi_table.c | 54 --------------------------
> lib/acpi/Makefile | 1 +
> lib/acpi/mcfg.c | 64 +++++++++++++++++++++++++++++++
> 6 files changed, 81 insertions(+), 65 deletions(-)
> create mode 100644 lib/acpi/mcfg.c
>
> diff --git a/arch/x86/cpu/intel_common/acpi.c b/arch/x86/cpu/intel_common/acpi.c
> index 15f19da206..d94ec208f6 100644
> --- a/arch/x86/cpu/intel_common/acpi.c
> +++ b/arch/x86/cpu/intel_common/acpi.c
> @@ -31,14 +31,17 @@
> #include <linux/err.h>
> #include <power/acpi_pmc.h>
>
> -u32 acpi_fill_mcfg(u32 current)
> +int acpi_fill_mcfg(struct acpi_ctx *ctx)
> {
> + size_t size;
> +
> /* PCI Segment Group 0, Start Bus Number 0, End Bus Number is 255 */
> - current += acpi_create_mcfg_mmconfig((void *)current,
> - CONFIG_MMCONF_BASE_ADDRESS, 0, 0,
> - (CONFIG_SA_PCIEX_LENGTH >> 20)
> - - 1);
> - return current;
> + size = acpi_create_mcfg_mmconfig((void *)ctx->current,
> + CONFIG_MMCONF_BASE_ADDRESS, 0, 0,
> + (CONFIG_SA_PCIEX_LENGTH >> 20) - 1);
> + acpi_inc(ctx, size);
> +
> + return 0;
> }
>
> static int acpi_sci_irq(void)
> diff --git a/arch/x86/cpu/tangier/acpi.c b/arch/x86/cpu/tangier/acpi.c
> index 12f9289612..e3a2fcea76 100644
> --- a/arch/x86/cpu/tangier/acpi.c
> +++ b/arch/x86/cpu/tangier/acpi.c
> @@ -68,14 +68,17 @@ u32 acpi_fill_madt(u32 current)
> return current;
> }
>
> -u32 acpi_fill_mcfg(u32 current)
> +int acpi_fill_mcfg(struct acpi_ctx *ctx)
> {
> + size_t size;
> +
> /* TODO: Derive parameters from SFI MCFG table */
> - current += acpi_create_mcfg_mmconfig
> - ((struct acpi_mcfg_mmconfig *)current,
> + size = acpi_create_mcfg_mmconfig
> + ((struct acpi_mcfg_mmconfig *)ctx->current,
> MCFG_BASE_ADDRESS, 0x0, 0x0, 0x0);
> + acpi_inc(ctx, size);
>
> - return current;
> + return 0;
> }
>
> static u32 acpi_fill_csrt_dma(struct acpi_csrt_group *grp)
> diff --git a/arch/x86/include/asm/acpi_table.h b/arch/x86/include/asm/acpi_table.h
> index 0d07f7cad8..39547de0d4 100644
> --- a/arch/x86/include/asm/acpi_table.h
> +++ b/arch/x86/include/asm/acpi_table.h
> @@ -34,7 +34,6 @@ int acpi_create_madt_lapic_nmi(struct acpi_madt_lapic_nmi *lapic_nmi,
> u32 acpi_fill_madt(u32 current);
> int acpi_create_mcfg_mmconfig(struct acpi_mcfg_mmconfig *mmconfig, u32 base,
> u16 seg_nr, u8 start, u8 end);
> -u32 acpi_fill_mcfg(u32 current);
>
> /**
> * acpi_write_hpet() - Write out a HPET table
> diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c
> index 753bf39619..c5b33dc65d 100644
> --- a/arch/x86/lib/acpi_table.c
> +++ b/arch/x86/lib/acpi_table.c
> @@ -161,28 +161,6 @@ int acpi_write_madt(struct acpi_ctx *ctx, const struct acpi_writer *entry)
> }
> ACPI_WRITER(5x86, NULL, acpi_write_madt, 0);
>
> -int acpi_create_mcfg_mmconfig(struct acpi_mcfg_mmconfig *mmconfig, u32 base,
> - u16 seg_nr, u8 start, u8 end)
> -{
> - memset(mmconfig, 0, sizeof(*mmconfig));
> - mmconfig->base_address_l = base;
> - mmconfig->base_address_h = 0;
> - mmconfig->pci_segment_group_number = seg_nr;
> - mmconfig->start_bus_number = start;
> - mmconfig->end_bus_number = end;
> -
> - return sizeof(struct acpi_mcfg_mmconfig);
> -}
> -
> -__weak u32 acpi_fill_mcfg(u32 current)
> -{
> - current += acpi_create_mcfg_mmconfig
> - ((struct acpi_mcfg_mmconfig *)current,
> - CONFIG_PCIE_ECAM_BASE, 0x0, 0x0, 255);
> -
> - return current;
> -}
> -
> /**
> * acpi_create_tcpa() - Create a TCPA table
> *
> @@ -480,38 +458,6 @@ int acpi_write_gnvs(struct acpi_ctx *ctx, const struct acpi_writer *entry)
> }
> ACPI_WRITER(4gnvs, "GNVS", acpi_write_gnvs, 0);
>
> -/* MCFG is defined in the PCI Firmware Specification 3.0 */
> -int acpi_write_mcfg(struct acpi_ctx *ctx, const struct acpi_writer *entry)
> -{
> - struct acpi_table_header *header;
> - struct acpi_mcfg *mcfg;
> - u32 current;
> -
> - mcfg = ctx->current;
> - header = &mcfg->header;
> -
> - current = (u32)mcfg + sizeof(struct acpi_mcfg);
> -
> - memset(mcfg, '\0', sizeof(struct acpi_mcfg));
> -
> - /* Fill out header fields */
> - acpi_fill_header(header, "MCFG");
> - header->length = sizeof(struct acpi_mcfg);
> - header->revision = 1;
> -
> - current = acpi_fill_mcfg(current);
> -
> - /* (Re)calculate length and checksum */
> - header->length = current - (u32)mcfg;
> - header->checksum = table_compute_checksum(mcfg, header->length);
> -
> - acpi_inc(ctx, mcfg->header.length);
> - acpi_add_table(ctx, mcfg);
> -
> - return 0;
> -}
> -ACPI_WRITER(5mcfg, "MCFG", acpi_write_mcfg, 0);
> -
> /**
> * acpi_write_hpet() - Write out a HPET table
> *
> diff --git a/lib/acpi/Makefile b/lib/acpi/Makefile
> index f9b504988f..956b5a0d72 100644
> --- a/lib/acpi/Makefile
> +++ b/lib/acpi/Makefile
> @@ -11,6 +11,7 @@ obj-y += acpi_writer.o
> ifndef CONFIG_QEMU
> obj-y += base.o
> obj-y += csrt.o
> +obj-y += mcfg.o
>
> # Sandbox does not build a .asl file
> ifndef CONFIG_SANDBOX
> diff --git a/lib/acpi/mcfg.c b/lib/acpi/mcfg.c
> new file mode 100644
> index 0000000000..2231e25124
> --- /dev/null
> +++ b/lib/acpi/mcfg.c
> @@ -0,0 +1,64 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Write an ACPI MCFG table
> + *
> + * Copyright 2022 Google LLC
> + */
> +
> +#define LOG_CATEGORY LOGC_ACPI
> +
> +#include <common.h>
> +#include <mapmem.h>
> +#include <tables_csum.h>
> +#include <acpi/acpi_table.h>
> +#include <dm/acpi.h>
> +
> +int acpi_create_mcfg_mmconfig(struct acpi_mcfg_mmconfig *mmconfig, u32 base,
> + u16 seg_nr, u8 start, u8 end)
> +{
> + memset(mmconfig, 0, sizeof(*mmconfig));
> + mmconfig->base_address_l = base;
> + mmconfig->base_address_h = 0;
> + mmconfig->pci_segment_group_number = seg_nr;
> + mmconfig->start_bus_number = start;
> + mmconfig->end_bus_number = end;
> +
> + return sizeof(struct acpi_mcfg_mmconfig);
> +}
> +
> +__weak int acpi_fill_mcfg(struct acpi_ctx *ctx)
> +{
> + return -ENOENT;
> +}
> +
> +/* MCFG is defined in the PCI Firmware Specification 3.0 */
> +int acpi_write_mcfg(struct acpi_ctx *ctx, const struct acpi_writer *entry)
> +{
> + struct acpi_table_header *header;
> + struct acpi_mcfg *mcfg;
> + int ret;
> +
> + mcfg = ctx->current;
> + header = &mcfg->header;
> +
> + memset(mcfg, '\0', sizeof(struct acpi_mcfg));
> +
> + /* Fill out header fields */
> + acpi_fill_header(header, "MCFG");
> + header->length = sizeof(struct acpi_mcfg);
> + header->revision = 1;
> + acpi_inc(ctx, sizeof(*header));
sizeof(*mcfg)
I can fix when applying if you agre?
> +
> + ret = acpi_fill_mcfg(ctx);
> + if (ret)
> + return log_msg_ret("fill", ret);
> +
> + /* (Re)calculate length and checksum */
> + header->length = (ulong)ctx->current - (ulong)mcfg;
> + header->checksum = table_compute_checksum(mcfg, header->length);
> +
> + acpi_add_table(ctx, mcfg);
> +
> + return 0;
> +}
> +ACPI_WRITER(5mcfg, "MCFG", acpi_write_mcfg, 0);
> --
> 2.35.0.263.gb82422642f-goog
>
Regards,
Simon
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