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path: root/drivers/misc/cxl/phb.c
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Diffstat (limited to 'drivers/misc/cxl/phb.c')
-rw-r--r--drivers/misc/cxl/phb.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/misc/cxl/phb.c b/drivers/misc/cxl/phb.c
new file mode 100644
index 000000000000..0935d44c1770
--- /dev/null
+++ b/drivers/misc/cxl/phb.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2014-2016 IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/pci.h>
+#include "cxl.h"
+
+bool _cxl_pci_associate_default_context(struct pci_dev *dev, struct cxl_afu *afu)
+{
+ struct cxl_context *ctx;
+
+ /*
+ * Allocate a context to do cxl things to. This is used for interrupts
+ * in the peer model using a real phb, and if we eventually do DMA ops
+ * in the virtual phb, we'll need a default context to attach them to.
+ */
+ ctx = cxl_dev_context_init(dev);
+ if (!ctx)
+ return false;
+ dev->dev.archdata.cxl_ctx = ctx;
+
+ return (cxl_ops->afu_check_and_enable(afu) == 0);
+}
+/* exported via cxl_base */
+
+void _cxl_pci_disable_device(struct pci_dev *dev)
+{
+ struct cxl_context *ctx = cxl_get_context(dev);
+
+ if (ctx) {
+ if (ctx->status == STARTED) {
+ dev_err(&dev->dev, "Default context started\n");
+ return;
+ }
+ dev->dev.archdata.cxl_ctx = NULL;
+ cxl_release_context(ctx);
+ }
+}
+/* exported via cxl_base */