Re: [PATCH 14/14] cxl: Add cxl_check_and_switch_mode() API to switch bi-modal cards
From: Andrew Donnellan <hidden>
Date: 2016-07-06 03:55:48
On 04/07/16 23:22, Ian Munsie wrote:
+static int setup_cxl_protocol_area(struct pci_dev *dev)
+{
+ u8 val;
+ int rc;
+ int vsec = find_cxl_vsec(dev);
+
+ if (!vsec) {
+ dev_info(&dev->dev, "CXL VSEC not found\n");
+ return -ENODEV;
+ }
+
+ rc = CXL_READ_VSEC_MODE_CONTROL(dev, vsec, &val);
+ if (rc) {
+ dev_err(&dev->dev, "Failed to read current mode control: %i\n", rc);
+ return rc;
+ }
+
+ if (!(val & CXL_VSEC_PROTOCOL_ENABLE)) {
+ dev_err(&dev->dev, "Card not in CAPI mode!\n");
+ return -EIO;
+ }
+
+ /* Still configure the protocol area for single mode cards */This comment is extraneous and will be dropped in V2. -- Andrew Donnellan OzLabs, ADL Canberra andrew.donnellan@au1.ibm.com IBM Australia Limited