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Message-ID: <20240516102116.3512377-1-fabio.m.de.francesco@linux.intel.com>
Date: Thu, 16 May 2024 12:19:53 +0200
From: "Fabio M. De Francesco" <fabio.m.de.francesco@...ux.intel.com>
To: Davidlohr Bueso <dave@...olabs.net>,
Jonathan Cameron <jonathan.cameron@...wei.com>,
Dave Jiang <dave.jiang@...el.com>,
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>,
linux-cxl@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: "Fabio M. De Francesco" <fabio.m.de.francesco@...ux.intel.com>
Subject: [PATCH v2] cxl/events: Use a common struct for DRAM and General Media events
cxl_event_common was a poor naming choice and caused confusion with the
existing Common Event Record.
Use cxl_event_media as a common structure to record information about DRAM
and General Media events because it simplifies handling the two events.
Suggested-by: Dan Williams <dan.j.williams@...el.com>
Fixes: 6aec00139d3a ("cxl/core: Add region info to cxl_general_media and cxl_dram events")
Signed-off-by: Fabio M. De Francesco <fabio.m.de.francesco@...ux.intel.com>
---
Changes for v2:
- Extend the commit message (Alison);
- Add a "Fixes" tag (Alison, thanks).
drivers/cxl/core/mbox.c | 6 ++--
drivers/cxl/core/trace.h | 4 +--
include/linux/cxl-event.h | 70 +++++++++++++++---------------------
tools/testing/cxl/test/mem.c | 4 +--
4 files changed, 36 insertions(+), 48 deletions(-)
diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
index 2626f3fff201..ad4d7b0f7f4d 100644
--- a/drivers/cxl/core/mbox.c
+++ b/drivers/cxl/core/mbox.c
@@ -875,16 +875,16 @@ void cxl_event_trace_record(const struct cxl_memdev *cxlmd,
guard(rwsem_read)(&cxl_region_rwsem);
guard(rwsem_read)(&cxl_dpa_rwsem);
- dpa = le64_to_cpu(evt->common.phys_addr) & CXL_DPA_MASK;
+ dpa = le64_to_cpu(evt->media_common.phys_addr) & CXL_DPA_MASK;
cxlr = cxl_dpa_to_region(cxlmd, dpa);
if (cxlr)
hpa = cxl_trace_hpa(cxlr, cxlmd, dpa);
if (event_type == CXL_CPER_EVENT_GEN_MEDIA)
trace_cxl_general_media(cxlmd, type, cxlr, hpa,
- &evt->gen_media);
+ &evt->media_general);
else if (event_type == CXL_CPER_EVENT_DRAM)
- trace_cxl_dram(cxlmd, type, cxlr, hpa, &evt->dram);
+ trace_cxl_dram(cxlmd, type, cxlr, hpa, &evt->media_dram);
}
}
EXPORT_SYMBOL_NS_GPL(cxl_event_trace_record, CXL);
diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h
index 07a0394b1d99..2c7293761bb2 100644
--- a/drivers/cxl/core/trace.h
+++ b/drivers/cxl/core/trace.h
@@ -316,7 +316,7 @@ TRACE_EVENT(cxl_generic_event,
TRACE_EVENT(cxl_general_media,
TP_PROTO(const struct cxl_memdev *cxlmd, enum cxl_event_log_type log,
- struct cxl_region *cxlr, u64 hpa, struct cxl_event_gen_media *rec),
+ struct cxl_region *cxlr, u64 hpa, struct cxl_event_media *rec),
TP_ARGS(cxlmd, log, cxlr, hpa, rec),
@@ -413,7 +413,7 @@ TRACE_EVENT(cxl_general_media,
TRACE_EVENT(cxl_dram,
TP_PROTO(const struct cxl_memdev *cxlmd, enum cxl_event_log_type log,
- struct cxl_region *cxlr, u64 hpa, struct cxl_event_dram *rec),
+ struct cxl_region *cxlr, u64 hpa, struct cxl_event_media *rec),
TP_ARGS(cxlmd, log, cxlr, hpa, rec),
diff --git a/include/linux/cxl-event.h b/include/linux/cxl-event.h
index 60b25020281f..e417556cc120 100644
--- a/include/linux/cxl-event.h
+++ b/include/linux/cxl-event.h
@@ -32,41 +32,38 @@ struct cxl_event_generic {
* CXL rev 3.0 Section 8.2.9.2.1.1; Table 8-43
*/
#define CXL_EVENT_GEN_MED_COMP_ID_SIZE 0x10
-struct cxl_event_gen_media {
- struct cxl_event_record_hdr hdr;
- __le64 phys_addr;
- u8 descriptor;
- u8 type;
- u8 transaction_type;
- u8 validity_flags[2];
- u8 channel;
- u8 rank;
- u8 device[3];
- u8 component_id[CXL_EVENT_GEN_MED_COMP_ID_SIZE];
- u8 reserved[46];
-} __packed;
-
/*
* DRAM Event Record - DER
* CXL rev 3.0 section 8.2.9.2.1.2; Table 3-44
*/
#define CXL_EVENT_DER_CORRECTION_MASK_SIZE 0x20
-struct cxl_event_dram {
+struct cxl_event_media {
struct cxl_event_record_hdr hdr;
- __le64 phys_addr;
- u8 descriptor;
- u8 type;
- u8 transaction_type;
- u8 validity_flags[2];
- u8 channel;
- u8 rank;
- u8 nibble_mask[3];
- u8 bank_group;
- u8 bank;
- u8 row[3];
- u8 column[2];
- u8 correction_mask[CXL_EVENT_DER_CORRECTION_MASK_SIZE];
- u8 reserved[0x17];
+ struct_group_tagged(cxl_event_media_hdr, media_hdr,
+ __le64 phys_addr;
+ u8 descriptor;
+ u8 type;
+ u8 transaction_type;
+ u8 validity_flags[2];
+ u8 channel;
+ u8 rank;
+ );
+ union {
+ struct_group(general,
+ u8 device[3];
+ u8 component_id[CXL_EVENT_GEN_MED_COMP_ID_SIZE];
+ u8 gen_reserved[46];
+ );
+ struct_group(dram,
+ u8 nibble_mask[3];
+ u8 bank_group;
+ u8 bank;
+ u8 row[3];
+ u8 column[2];
+ u8 correction_mask[CXL_EVENT_DER_CORRECTION_MASK_SIZE];
+ u8 dram_reserved[0x17];
+ );
+ };
} __packed;
/*
@@ -95,21 +92,12 @@ struct cxl_event_mem_module {
u8 reserved[0x3d];
} __packed;
-/*
- * General Media or DRAM Event Common Fields
- * - provides common access to phys_addr
- */
-struct cxl_event_common {
- struct cxl_event_record_hdr hdr;
- __le64 phys_addr;
-} __packed;
-
union cxl_event {
struct cxl_event_generic generic;
- struct cxl_event_gen_media gen_media;
- struct cxl_event_dram dram;
+ struct cxl_event_media media_general;
+ struct cxl_event_media media_dram;
struct cxl_event_mem_module mem_module;
- struct cxl_event_common common;
+ struct cxl_event_media media_common;
} __packed;
/*
diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c
index 6584443144de..0a8fd145c391 100644
--- a/tools/testing/cxl/test/mem.c
+++ b/tools/testing/cxl/test/mem.c
@@ -378,7 +378,7 @@ struct cxl_event_record_raw hardware_replace = {
struct cxl_test_gen_media {
uuid_t id;
- struct cxl_event_gen_media rec;
+ struct cxl_event_media rec;
} __packed;
struct cxl_test_gen_media gen_media = {
@@ -402,7 +402,7 @@ struct cxl_test_gen_media gen_media = {
struct cxl_test_dram {
uuid_t id;
- struct cxl_event_dram rec;
+ struct cxl_event_media rec;
} __packed;
struct cxl_test_dram dram = {
--
2.45.0
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