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Message-ID: <f448a1fe-2f4b-4054-888a-8d19f85c012d@intel.com>
Date: Fri, 10 Jan 2025 09:19:09 -0700
From: Dave Jiang <dave.jiang@...el.com>
To: Smita Koralahalli <Smita.KoralahalliChannabasappa@....com>,
linux-efi@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-cxl@...r.kernel.org
Cc: Ard Biesheuvel <ardb@...nel.org>,
Alison Schofield <alison.schofield@...el.com>,
Vishal Verma <vishal.l.verma@...el.com>, Ira Weiny <ira.weiny@...el.com>,
Dan Williams <dan.j.williams@...el.com>,
Jonathan Cameron <Jonathan.Cameron@...wei.com>,
Yazen Ghannam <yazen.ghannam@....com>, Terry Bowman <terry.bowman@....com>
Subject: Re: [PATCH v4 2/5] efi/cper, cxl: Make definitions and structures
global
On 12/16/24 7:20 PM, Smita Koralahalli wrote:
> In preparation to add tracepoint support, move protocol error UUID
> definition to a common location, Also, make struct CXL RAS capability,
> cxl_cper_sec_prot_err and CPER validation flags global for use across
> different modules.
>
> Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@....com>
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
> Reviewed-by: Ira Weiny <ira.weiny@...el.com>
Reviewed-by: Dave Jiang <dave.jiang@...el.com>
> ---
> drivers/firmware/efi/cper.c | 1 +
> drivers/firmware/efi/cper_cxl.c | 35 +--------------
> drivers/firmware/efi/cper_cxl.h | 51 ---------------------
> include/cxl/event.h | 80 +++++++++++++++++++++++++++++++++
> include/linux/cper.h | 4 ++
> 5 files changed, 86 insertions(+), 85 deletions(-)
>
> diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
> index 8e5762f7ef2e..ae1953e2b214 100644
> --- a/drivers/firmware/efi/cper.c
> +++ b/drivers/firmware/efi/cper.c
> @@ -24,6 +24,7 @@
> #include <linux/bcd.h>
> #include <acpi/ghes.h>
> #include <ras/ras_event.h>
> +#include <cxl/event.h>
> #include "cper_cxl.h"
>
> /*
> diff --git a/drivers/firmware/efi/cper_cxl.c b/drivers/firmware/efi/cper_cxl.c
> index cbaabcb7382d..64c0dd27be6e 100644
> --- a/drivers/firmware/efi/cper_cxl.c
> +++ b/drivers/firmware/efi/cper_cxl.c
> @@ -8,27 +8,9 @@
> */
>
> #include <linux/cper.h>
> +#include <cxl/event.h>
> #include "cper_cxl.h"
>
> -#define PROT_ERR_VALID_AGENT_TYPE BIT_ULL(0)
> -#define PROT_ERR_VALID_AGENT_ADDRESS BIT_ULL(1)
> -#define PROT_ERR_VALID_DEVICE_ID BIT_ULL(2)
> -#define PROT_ERR_VALID_SERIAL_NUMBER BIT_ULL(3)
> -#define PROT_ERR_VALID_CAPABILITY BIT_ULL(4)
> -#define PROT_ERR_VALID_DVSEC BIT_ULL(5)
> -#define PROT_ERR_VALID_ERROR_LOG BIT_ULL(6)
> -
> -/* CXL RAS Capability Structure, CXL v3.0 sec 8.2.4.16 */
> -struct cxl_ras_capability_regs {
> - u32 uncor_status;
> - u32 uncor_mask;
> - u32 uncor_severity;
> - u32 cor_status;
> - u32 cor_mask;
> - u32 cap_control;
> - u32 header_log[16];
> -};
> -
> static const char * const prot_err_agent_type_strs[] = {
> "Restricted CXL Device",
> "Restricted CXL Host Downstream Port",
> @@ -40,21 +22,6 @@ static const char * const prot_err_agent_type_strs[] = {
> "CXL Upstream Switch Port",
> };
>
> -/*
> - * The layout of the enumeration and the values matches CXL Agent Type
> - * field in the UEFI 2.10 Section N.2.13,
> - */
> -enum {
> - RCD, /* Restricted CXL Device */
> - RCH_DP, /* Restricted CXL Host Downstream Port */
> - DEVICE, /* CXL Device */
> - LD, /* CXL Logical Device */
> - FMLD, /* CXL Fabric Manager managed Logical Device */
> - RP, /* CXL Root Port */
> - DSP, /* CXL Downstream Switch Port */
> - USP, /* CXL Upstream Switch Port */
> -};
> -
> void cxl_cper_print_prot_err(const char *pfx,
> const struct cxl_cper_sec_prot_err *prot_err)
> {
> diff --git a/drivers/firmware/efi/cper_cxl.h b/drivers/firmware/efi/cper_cxl.h
> index 0e3ab0ba17c3..5ce1401ee17a 100644
> --- a/drivers/firmware/efi/cper_cxl.h
> +++ b/drivers/firmware/efi/cper_cxl.h
> @@ -10,57 +10,6 @@
> #ifndef LINUX_CPER_CXL_H
> #define LINUX_CPER_CXL_H
>
> -/* CXL Protocol Error Section */
> -#define CPER_SEC_CXL_PROT_ERR \
> - GUID_INIT(0x80B9EFB4, 0x52B5, 0x4DE3, 0xA7, 0x77, 0x68, 0x78, \
> - 0x4B, 0x77, 0x10, 0x48)
> -
> -#pragma pack(1)
> -
> -/* Compute Express Link Protocol Error Section, UEFI v2.10 sec N.2.13 */
> -struct cxl_cper_sec_prot_err {
> - u64 valid_bits;
> - u8 agent_type;
> - u8 reserved[7];
> -
> - /*
> - * Except for RCH Downstream Port, all the remaining CXL Agent
> - * types are uniquely identified by the PCIe compatible SBDF number.
> - */
> - union {
> - u64 rcrb_base_addr;
> - struct {
> - u8 function;
> - u8 device;
> - u8 bus;
> - u16 segment;
> - u8 reserved_1[3];
> - };
> - } agent_addr;
> -
> - struct {
> - u16 vendor_id;
> - u16 device_id;
> - u16 subsystem_vendor_id;
> - u16 subsystem_id;
> - u8 class_code[2];
> - u16 slot;
> - u8 reserved_1[4];
> - } device_id;
> -
> - struct {
> - u32 lower_dw;
> - u32 upper_dw;
> - } dev_serial_num;
> -
> - u8 capability[60];
> - u16 dvsec_len;
> - u16 err_len;
> - u8 reserved_2[4];
> -};
> -
> -#pragma pack()
> -
> void cxl_cper_print_prot_err(const char *pfx,
> const struct cxl_cper_sec_prot_err *prot_err);
>
> diff --git a/include/cxl/event.h b/include/cxl/event.h
> index 0bea1afbd747..66d85fc87701 100644
> --- a/include/cxl/event.h
> +++ b/include/cxl/event.h
> @@ -152,6 +152,86 @@ struct cxl_cper_work_data {
> struct cxl_cper_event_rec rec;
> };
>
> +#define PROT_ERR_VALID_AGENT_TYPE BIT_ULL(0)
> +#define PROT_ERR_VALID_AGENT_ADDRESS BIT_ULL(1)
> +#define PROT_ERR_VALID_DEVICE_ID BIT_ULL(2)
> +#define PROT_ERR_VALID_SERIAL_NUMBER BIT_ULL(3)
> +#define PROT_ERR_VALID_CAPABILITY BIT_ULL(4)
> +#define PROT_ERR_VALID_DVSEC BIT_ULL(5)
> +#define PROT_ERR_VALID_ERROR_LOG BIT_ULL(6)
> +
> +/*
> + * The layout of the enumeration and the values matches CXL Agent Type
> + * field in the UEFI 2.10 Section N.2.13,
> + */
> +enum {
> + RCD, /* Restricted CXL Device */
> + RCH_DP, /* Restricted CXL Host Downstream Port */
> + DEVICE, /* CXL Device */
> + LD, /* CXL Logical Device */
> + FMLD, /* CXL Fabric Manager managed Logical Device */
> + RP, /* CXL Root Port */
> + DSP, /* CXL Downstream Switch Port */
> + USP, /* CXL Upstream Switch Port */
> +};
> +
> +#pragma pack(1)
> +
> +/* Compute Express Link Protocol Error Section, UEFI v2.10 sec N.2.13 */
> +struct cxl_cper_sec_prot_err {
> + u64 valid_bits;
> + u8 agent_type;
> + u8 reserved[7];
> +
> + /*
> + * Except for RCH Downstream Port, all the remaining CXL Agent
> + * types are uniquely identified by the PCIe compatible SBDF number.
> + */
> + union {
> + u64 rcrb_base_addr;
> + struct {
> + u8 function;
> + u8 device;
> + u8 bus;
> + u16 segment;
> + u8 reserved_1[3];
> + };
> + } agent_addr;
> +
> + struct {
> + u16 vendor_id;
> + u16 device_id;
> + u16 subsystem_vendor_id;
> + u16 subsystem_id;
> + u8 class_code[2];
> + u16 slot;
> + u8 reserved_1[4];
> + } device_id;
> +
> + struct {
> + u32 lower_dw;
> + u32 upper_dw;
> + } dev_serial_num;
> +
> + u8 capability[60];
> + u16 dvsec_len;
> + u16 err_len;
> + u8 reserved_2[4];
> +};
> +
> +#pragma pack()
> +
> +/* CXL RAS Capability Structure, CXL v3.0 sec 8.2.4.16 */
> +struct cxl_ras_capability_regs {
> + u32 uncor_status;
> + u32 uncor_mask;
> + u32 uncor_severity;
> + u32 cor_status;
> + u32 cor_mask;
> + u32 cap_control;
> + u32 header_log[16];
> +};
> +
> #ifdef CONFIG_ACPI_APEI_GHES
> int cxl_cper_register_work(struct work_struct *work);
> int cxl_cper_unregister_work(struct work_struct *work);
> diff --git a/include/linux/cper.h b/include/linux/cper.h
> index 265b0f8fc0b3..5c6d4d5b9975 100644
> --- a/include/linux/cper.h
> +++ b/include/linux/cper.h
> @@ -89,6 +89,10 @@ enum {
> #define CPER_NOTIFY_DMAR \
> GUID_INIT(0x667DD791, 0xC6B3, 0x4c27, 0x8A, 0x6B, 0x0F, 0x8E, \
> 0x72, 0x2D, 0xEB, 0x41)
> +/* CXL Protocol Error Section */
> +#define CPER_SEC_CXL_PROT_ERR \
> + GUID_INIT(0x80B9EFB4, 0x52B5, 0x4DE3, 0xA7, 0x77, 0x68, 0x78, \
> + 0x4B, 0x77, 0x10, 0x48)
>
> /* CXL Event record UUIDs are formatted as GUIDs and reported in section type */
> /*
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