cxl: Introduce implementation-specific API
The backend API (in cxl.h) lists some low-level functions whose
implementation is different on bare-metal and in a guest. Each
environment implements its own functions, and the common code uses
them through function pointers, defined in cxl_backend_ops
Co-authored-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Reviewed-by: Manoj Kumar <manoj@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/drivers/misc/cxl/file.c b/drivers/misc/cxl/file.c
index 783337d..b8ce29b 100644
--- a/drivers/misc/cxl/file.c
+++ b/drivers/misc/cxl/file.c
@@ -79,7 +79,7 @@
if (!afu->current_mode)
goto err_put_afu;
- if (!cxl_adapter_link_ok(adapter)) {
+ if (!cxl_ops->link_ok(adapter)) {
rc = -EIO;
goto err_put_afu;
}
@@ -210,8 +210,8 @@
trace_cxl_attach(ctx, work.work_element_descriptor, work.num_interrupts, amr);
- if ((rc = cxl_attach_process(ctx, false, work.work_element_descriptor,
- amr))) {
+ if ((rc = cxl_ops->attach_process(ctx, false, work.work_element_descriptor,
+ amr))) {
afu_release_irqs(ctx, ctx);
goto out;
}
@@ -222,6 +222,7 @@
mutex_unlock(&ctx->status_mutex);
return rc;
}
+
static long afu_ioctl_process_element(struct cxl_context *ctx,
int __user *upe)
{
@@ -259,7 +260,7 @@
if (ctx->status == CLOSED)
return -EIO;
- if (!cxl_adapter_link_ok(ctx->afu->adapter))
+ if (!cxl_ops->link_ok(ctx->afu->adapter))
return -EIO;
pr_devel("afu_ioctl\n");
@@ -289,7 +290,7 @@
if (ctx->status != STARTED)
return -EIO;
- if (!cxl_adapter_link_ok(ctx->afu->adapter))
+ if (!cxl_ops->link_ok(ctx->afu->adapter))
return -EIO;
return cxl_context_iomap(ctx, vm);
@@ -336,7 +337,7 @@
int rc;
DEFINE_WAIT(wait);
- if (!cxl_adapter_link_ok(ctx->afu->adapter))
+ if (!cxl_ops->link_ok(ctx->afu->adapter))
return -EIO;
if (count < CXL_READ_MIN_SIZE)
@@ -349,7 +350,7 @@
if (ctx_event_pending(ctx))
break;
- if (!cxl_adapter_link_ok(ctx->afu->adapter)) {
+ if (!cxl_ops->link_ok(ctx->afu->adapter)) {
rc = -EIO;
goto out;
}