diff mbox series

[v11,09/23] cxl: prepare memdev creation for type2

Message ID 20250310210340.3234884-10-alejandro.lucero-palau@amd.com
State New
Headers show
Series add type2 device basic support | expand

Commit Message

Lucero Palau, Alejandro March 10, 2025, 9:03 p.m. UTC 
From: Alejandro Lucero <alucerop@amd.com>

Current cxl core is relying on a CXL_DEVTYPE_CLASSMEM type device when
creating a memdev leading to problems when obtaining cxl_memdev_state
references from a CXL_DEVTYPE_DEVMEM type.

Modify check for obtaining cxl_memdev_state adding CXL_DEVTYPE_DEVMEM
support.

Make devm_cxl_add_memdev accesible from a accel driver.

Signed-off-by: Alejandro Lucero <alucerop@amd.com>
---
 drivers/cxl/core/memdev.c | 15 +++++++++++++--
 drivers/cxl/cxlmem.h      |  2 --
 include/cxl/cxl.h         |  2 ++
 3 files changed, 15 insertions(+), 4 deletions(-)

Comments

Ben Cheatham March 11, 2025, 8:05 p.m. UTC | #1 
On 3/10/25 4:03 PM, alejandro.lucero-palau@amd.com wrote:
> From: Alejandro Lucero <alucerop@amd.com>
> 
> Current cxl core is relying on a CXL_DEVTYPE_CLASSMEM type device when
> creating a memdev leading to problems when obtaining cxl_memdev_state
> references from a CXL_DEVTYPE_DEVMEM type.
> 
> Modify check for obtaining cxl_memdev_state adding CXL_DEVTYPE_DEVMEM
> support.
> 
> Make devm_cxl_add_memdev accesible from a accel driver.
> 
> Signed-off-by: Alejandro Lucero <alucerop@amd.com>
> ---

Reviewed-by: Ben Cheatham <benjamin.cheatham@amd.com>
diff mbox series

Patch

diff --git a/drivers/cxl/core/memdev.c b/drivers/cxl/core/memdev.c
index 6cc732aeb9de..31af5c1ebe11 100644
--- a/drivers/cxl/core/memdev.c
+++ b/drivers/cxl/core/memdev.c
@@ -7,6 +7,7 @@ 
 #include <linux/slab.h>
 #include <linux/idr.h>
 #include <linux/pci.h>
+#include <cxl/cxl.h>
 #include <cxlmem.h>
 #include "trace.h"
 #include "core.h"
@@ -562,9 +563,16 @@  static const struct device_type cxl_memdev_type = {
 	.groups = cxl_memdev_attribute_groups,
 };
 
+static const struct device_type cxl_accel_memdev_type = {
+	.name = "cxl_accel_memdev",
+	.release = cxl_memdev_release,
+	.devnode = cxl_memdev_devnode,
+};
+
 bool is_cxl_memdev(const struct device *dev)
 {
-	return dev->type == &cxl_memdev_type;
+	return (dev->type == &cxl_memdev_type ||
+		dev->type == &cxl_accel_memdev_type);
 }
 EXPORT_SYMBOL_NS_GPL(is_cxl_memdev, "CXL");
 
@@ -689,7 +697,10 @@  static struct cxl_memdev *cxl_memdev_alloc(struct cxl_dev_state *cxlds,
 	dev->parent = cxlds->dev;
 	dev->bus = &cxl_bus_type;
 	dev->devt = MKDEV(cxl_mem_major, cxlmd->id);
-	dev->type = &cxl_memdev_type;
+	if (cxlds->type == CXL_DEVTYPE_DEVMEM)
+		dev->type = &cxl_accel_memdev_type;
+	else
+		dev->type = &cxl_memdev_type;
 	device_set_pm_not_required(dev);
 	INIT_WORK(&cxlmd->detach_work, detach_memdev);
 
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index e47f51025efd..9fdaf5cf1dd9 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -88,8 +88,6 @@  static inline bool is_cxl_endpoint(struct cxl_port *port)
 	return is_cxl_memdev(port->uport_dev);
 }
 
-struct cxl_memdev *devm_cxl_add_memdev(struct device *host,
-				       struct cxl_dev_state *cxlds);
 int devm_cxl_sanitize_setup_notifier(struct device *host,
 				     struct cxl_memdev *cxlmd);
 struct cxl_memdev_state;
diff --git a/include/cxl/cxl.h b/include/cxl/cxl.h
index af7d3c4d8142..340503d7c33c 100644
--- a/include/cxl/cxl.h
+++ b/include/cxl/cxl.h
@@ -242,4 +242,6 @@  int cxl_pci_accel_setup_regs(struct pci_dev *pdev, struct cxl_dev_state *cxlmds,
 void cxl_mem_dpa_init(struct cxl_dpa_info *info, u64 volatile_bytes,
 		      u64 persistent_bytes);
 int cxl_dpa_setup(struct cxl_dev_state *cxlds, const struct cxl_dpa_info *info);
+struct cxl_memdev *devm_cxl_add_memdev(struct device *host,
+				       struct cxl_dev_state *cxlmds);
 #endif