cxl/region: Add dev_dbg() detail on failure to allocate HPA space
When the region driver fails while allocating HPA space for a new region it can be because the parent resource, the CXL Window, has no more available space. In that case, the debug user sees this message: cxl_core:alloc_hpa:555: cxl region2: failed to allocate HPA: -34 Expand the message like this: cxl_core:alloc_hpa:555: cxl region8: HPA allocation error (-34) for size:0x20000000 in CXL Window 0 [mem 0xf010000000-0xf04fffffff flags 0x200] Now the debug user can examine /proc/iomem and consider actions like removing other allocations in that space or reducing the size of their region request. Suggested-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Vishal Verma <vishal.l.verma@intel.com> Reviewed-by: Fan Ni <fan.ni@samsung.com> Link: https://lore.kernel.org/r/20231223004740.1401858-1-alison.schofield@intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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@ -552,8 +552,9 @@ static int alloc_hpa(struct cxl_region *cxlr, resource_size_t size)
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res = alloc_free_mem_region(cxlrd->res, size, SZ_256M,
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dev_name(&cxlr->dev));
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if (IS_ERR(res)) {
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dev_dbg(&cxlr->dev, "failed to allocate HPA: %ld\n",
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PTR_ERR(res));
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dev_dbg(&cxlr->dev,
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"HPA allocation error (%ld) for size:%#llx in %s %pr\n",
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PTR_ERR(res), size, cxlrd->res->name, cxlrd->res);
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return PTR_ERR(res);
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}
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