[v2,11/14] cxl/pci: Rename RAS handler interfaces to also indicate CXL PCIe port support

Commit Message

Bowman, Terry Oct. 25, 2024, 9:03 p.m. UTC

CXL PCIe port protocol error handling support will be added to the
CXL drivers in the future. In preparation, rename the existing
interfaces to support handling all CXL PCIe port protocol errors.

The driver's RAS support functions currently rely on a 'struct
cxl_dev_state' type parameter, which is not available for CXL port
devices. However, since the same CXL RAS capability structure is
needed across most CXL components and devices, a common handling
approach should be adopted.

To accommodate this, update the __cxl_handle_cor_ras() and
__cxl_handle_ras() functions to use a `struct device` instead of
`struct cxl_dev_state`.

No functional changes are introduced.

[1] CXL 3.1 Spec, 8.2.4 CXL.cache and CXL.mem Registers

Signed-off-by: Terry Bowman <[e-mail]>
---
 drivers/cxl/core/pci.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

Comments

Jonathan Cameron Oct. 30, 2024, 3:59 p.m. UTC | #1

On Fri, 25 Oct 2024 16:03:02 -0500
Terry Bowman <[e-mail]> wrote:

Patch title looks unconnected to the patch. Cut and paste issue?


> CXL PCIe port protocol error handling support will be added to the
> CXL drivers in the future. In preparation, rename the existing
> interfaces to support handling all CXL PCIe port protocol errors.
> 
> The driver's RAS support functions currently rely on a 'struct
> cxl_dev_state' type parameter, which is not available for CXL port
> devices. However, since the same CXL RAS capability structure is
> needed across most CXL components and devices, a common handling
> approach should be adopted.
> 
> To accommodate this, update the __cxl_handle_cor_ras() and
> __cxl_handle_ras() functions to use a `struct device` instead of
> `struct cxl_dev_state`.
> 
> No functional changes are introduced.
> 
> [1] CXL 3.1 Spec, 8.2.4 CXL.cache and CXL.mem Registers
> 
> Signed-off-by: Terry Bowman <[e-mail]>
Otherwise looks fine

Patch

diff --git a/drivers/cxl/core/pci.c b/drivers/cxl/core/pci.c
index 53ca773557f3..bb2fd7d04c4f 100644
--- a/drivers/cxl/core/pci.c
+++ b/drivers/cxl/core/pci.c
@@ -650,7 +650,7 @@  void read_cdat_data(struct cxl_port *port)
 }
 EXPORT_SYMBOL_NS_GPL(read_cdat_data, CXL);
 
-static void __cxl_handle_cor_ras(struct cxl_dev_state *cxlds,
+static void __cxl_handle_cor_ras(struct device *dev,
 				 void __iomem *ras_base)
 {
 	void __iomem *addr;
@@ -663,13 +663,13 @@  static void __cxl_handle_cor_ras(struct cxl_dev_state *cxlds,
 	status = readl(addr);
 	if (status & CXL_RAS_CORRECTABLE_STATUS_MASK) {
 		writel(status & CXL_RAS_CORRECTABLE_STATUS_MASK, addr);
-		trace_cxl_aer_correctable_error(cxlds->cxlmd, status);
+		trace_cxl_aer_correctable_error(to_cxl_memdev(dev), status);
 	}
 }
 
 static void cxl_handle_endpoint_cor_ras(struct cxl_dev_state *cxlds)
 {
-	return __cxl_handle_cor_ras(cxlds, cxlds->regs.ras);
+	return __cxl_handle_cor_ras(&cxlds->cxlmd->dev, cxlds->regs.ras);
 }
 
 /* CXL spec rev3.0 8.2.4.16.1 */
@@ -693,8 +693,7 @@  static void header_log_copy(void __iomem *ras_base, u32 *log)
  * Log the state of the RAS status registers and prepare them to log the
  * next error status. Return 1 if reset needed.
  */
-static bool __cxl_handle_ras(struct cxl_dev_state *cxlds,
-				  void __iomem *ras_base)
+static bool __cxl_handle_ras(struct device *dev, void __iomem *ras_base)
 {
 	u32 hl[CXL_HEADERLOG_SIZE_U32];
 	void __iomem *addr;
@@ -721,7 +720,7 @@  static bool __cxl_handle_ras(struct cxl_dev_state *cxlds,
 	}
 
 	header_log_copy(ras_base, hl);
-	trace_cxl_aer_uncorrectable_error(cxlds->cxlmd, status, fe, hl);
+	trace_cxl_aer_uncorrectable_error(to_cxl_memdev(dev), status, fe, hl);
 	writel(status & CXL_RAS_UNCORRECTABLE_STATUS_MASK, addr);
 
 	return true;
@@ -729,7 +728,7 @@  static bool __cxl_handle_ras(struct cxl_dev_state *cxlds,
 
 static bool cxl_handle_endpoint_ras(struct cxl_dev_state *cxlds)
 {
-	return __cxl_handle_ras(cxlds, cxlds->regs.ras);
+	return __cxl_handle_ras(&cxlds->cxlmd->dev, cxlds->regs.ras);
 }
 
 #ifdef CONFIG_PCIEAER_CXL
@@ -823,13 +822,13 @@  EXPORT_SYMBOL_NS_GPL(cxl_dport_init_ras_reporting, CXL);
 static void cxl_handle_rdport_cor_ras(struct cxl_dev_state *cxlds,
 					  struct cxl_dport *dport)
 {
-	return __cxl_handle_cor_ras(cxlds, dport->regs.ras);
+	return __cxl_handle_cor_ras(&cxlds->cxlmd->dev, dport->regs.ras);
 }
 
 static bool cxl_handle_rdport_ras(struct cxl_dev_state *cxlds,
 				       struct cxl_dport *dport)
 {
-	return __cxl_handle_ras(cxlds, dport->regs.ras);
+	return __cxl_handle_ras(&cxlds->cxlmd->dev, dport->regs.ras);
 }
 
 /*