[v3,08/20] cxl: add function for setting media ready by a driver

Commit Message

Lucero Palau, Alejandro Sept. 7, 2024, 8:18 a.m. UTC

From: Alejandro Lucero <[e-mail]>

A Type-2 driver can require to set the memory availability explicitly.

Add a function to the exported CXL API for accelerator drivers.

Signed-off-by: Alejandro Lucero <[e-mail]>
---
 drivers/cxl/core/memdev.c          | 6 ++++++
 drivers/net/ethernet/sfc/efx_cxl.c | 5 +++++
 include/linux/cxl/cxl.h            | 1 +
 3 files changed, 12 insertions(+)

Patch

diff --git a/drivers/cxl/core/memdev.c b/drivers/cxl/core/memdev.c
index a7d8daf4a59b..836faf09b328 100644
--- a/drivers/cxl/core/memdev.c
+++ b/drivers/cxl/core/memdev.c
@@ -784,6 +784,12 @@  int cxl_release_resource(struct cxl_dev_state *cxlds, enum cxl_resource type)
 }
 EXPORT_SYMBOL_NS_GPL(cxl_release_resource, CXL);
 
+void cxl_set_media_ready(struct cxl_dev_state *cxlds)
+{
+	cxlds->media_ready = true;
+}
+EXPORT_SYMBOL_NS_GPL(cxl_set_media_ready, CXL);
+
 static int cxl_memdev_release_file(struct inode *inode, struct file *file)
 {
 	struct cxl_memdev *cxlmd =
diff --git a/drivers/net/ethernet/sfc/efx_cxl.c b/drivers/net/ethernet/sfc/efx_cxl.c
index 80259c8317fd..14fab41fe10a 100644
--- a/drivers/net/ethernet/sfc/efx_cxl.c
+++ b/drivers/net/ethernet/sfc/efx_cxl.c
@@ -78,6 +78,11 @@  int efx_cxl_init(struct efx_nic *efx)
 		goto err;
 	}
 
+	/* We do not have the register about media status. Hardware design
+	 * implies it is ready.
+	 */
+	cxl_set_media_ready(cxl->cxlds);
+
 	return 0;
 err:
 	kfree(cxl->cxlds);
diff --git a/include/linux/cxl/cxl.h b/include/linux/cxl/cxl.h
index 22912b2d9bb2..08723b2d75bc 100644
--- a/include/linux/cxl/cxl.h
+++ b/include/linux/cxl/cxl.h
@@ -54,4 +54,5 @@  bool cxl_pci_check_caps(struct cxl_dev_state *cxlds, u32 expected_caps,
 int cxl_pci_accel_setup_regs(struct pci_dev *pdev, struct cxl_dev_state *cxlds);
 int cxl_request_resource(struct cxl_dev_state *cxlds, enum cxl_resource type);
 int cxl_release_resource(struct cxl_dev_state *cxlds, enum cxl_resource type);
+void cxl_set_media_ready(struct cxl_dev_state *cxlds);
 #endif