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Diffstat (limited to 'drivers/misc/cxl/context.c')
-rw-r--r--drivers/misc/cxl/context.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/misc/cxl/context.c b/drivers/misc/cxl/context.c
index ac2531e4ad32..4472ce11f98d 100644
--- a/drivers/misc/cxl/context.c
+++ b/drivers/misc/cxl/context.c
@@ -188,13 +188,26 @@ int cxl_context_iomap(struct cxl_context *ctx, struct vm_area_struct *vma)
if (ctx->afu->current_mode == CXL_MODE_DEDICATED) {
if (start + len > ctx->afu->adapter->ps_size)
return -EINVAL;
+
+ if (cxl_is_psl9(ctx->afu)) {
+ /*
+ * Make sure there is a valid problem state
+ * area space for this AFU.
+ */
+ if (ctx->master && !ctx->afu->psa) {
+ pr_devel("AFU doesn't support mmio space\n");
+ return -EINVAL;
+ }
+
+ /* Can't mmap until the AFU is enabled */
+ if (!ctx->afu->enabled)
+ return -EBUSY;
+ }
} else {
if (start + len > ctx->psn_size)
return -EINVAL;
- }
- if (ctx->afu->current_mode != CXL_MODE_DEDICATED) {
- /* make sure there is a valid per process space for this AFU */
+ /* Make sure there is a valid per process space for this AFU */
if ((ctx->master && !ctx->afu->psa) || (!ctx->afu->pp_psa)) {
pr_devel("AFU doesn't support mmio space\n");
return -EINVAL;