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authorVaibhav Jain <vaibhav@linux.vnet.ibm.com>2016-02-29 08:40:53 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2016-03-09 15:40:03 +0300
commit17eb3eef19f2c0541a7f04ad37c4a7fec89f0822 (patch)
tree46bd579b3d7fd63d3d8b7e19814952b04ae82ac9
parent0d3a13fbf1d1f3323d04499a727c17c80d156168 (diff)
downloadlinux-17eb3eef19f2c0541a7f04ad37c4a7fec89f0822.tar.xz
cxl: Ignore probes for virtual afu pci devices
Add a check at the beginning of cxl_probe function to ignore virtual pci devices created for each afu registered. This fixes the the errors messages logged about missing CXL vsec, when cxl probe is unable to find necessary vsec entries in device pci config space. The error message logged are of the form : cxl-pci 0004:00:00.0: ABORTING: CXL VSEC not found! cxl-pci 0004:00:00.0: cxl_init_adapter failed: -19 Cc: Ian Munsie <imunsie@au1.ibm.com> Cc: Frederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com> Reviewed-by: fbarrat@linux.vnet.ibm.com Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Acked-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
-rw-r--r--drivers/misc/cxl/cxl.h2
-rw-r--r--drivers/misc/cxl/pci.c5
-rw-r--r--drivers/misc/cxl/vphb.c9
3 files changed, 16 insertions, 0 deletions
diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h
index e345860c25eb..38e21cf7806e 100644
--- a/drivers/misc/cxl/cxl.h
+++ b/drivers/misc/cxl/cxl.h
@@ -880,4 +880,6 @@ extern const struct cxl_backend_ops cxl_native_ops;
extern const struct cxl_backend_ops cxl_guest_ops;
extern const struct cxl_backend_ops *cxl_ops;
+/* check if the given pci_dev is on the the cxl vphb bus */
+bool cxl_pci_is_vphb_device(struct pci_dev *dev);
#endif
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index 6cae0445a7c8..6634b7a3c42b 100644
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c
@@ -1243,6 +1243,11 @@ static int cxl_probe(struct pci_dev *dev, const struct pci_device_id *id)
int slice;
int rc;
+ if (cxl_pci_is_vphb_device(dev)) {
+ dev_dbg(&dev->dev, "cxl_init_adapter: Ignoring cxl vphb device\n");
+ return -ENODEV;
+ }
+
if (cxl_verbose)
dump_cxl_config_space(dev);
diff --git a/drivers/misc/cxl/vphb.c b/drivers/misc/cxl/vphb.c
index 490b93486451..cdc7723b845d 100644
--- a/drivers/misc/cxl/vphb.c
+++ b/drivers/misc/cxl/vphb.c
@@ -272,6 +272,15 @@ void cxl_pci_vphb_remove(struct cxl_afu *afu)
pcibios_free_controller(phb);
}
+bool cxl_pci_is_vphb_device(struct pci_dev *dev)
+{
+ struct pci_controller *phb;
+
+ phb = pci_bus_to_host(dev->bus);
+
+ return (phb->ops == &cxl_pcie_pci_ops);
+}
+
struct cxl_afu *cxl_pci_to_afu(struct pci_dev *dev)
{
struct pci_controller *phb;