mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 12:29:44 +07:00
fdc029b19d
The dev field in struct dev_pagemap is only used to print dev_name in two places, which are at best nice to have. Just remove the field and thus the name in those two messages. Link: https://lore.kernel.org/r/20190818090557.17853-3-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Dan Williams <dan.j.williams@intel.com> Tested-by: Bharata B Rao <bharata@linux.ibm.com> Reviewed-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
432 lines
11 KiB
C
432 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
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*/
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#include <linux/memremap.h>
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#include <linux/rculist.h>
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#include <linux/export.h>
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#include <linux/ioport.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/pfn_t.h>
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#include <linux/acpi.h>
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#include <linux/io.h>
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#include <linux/mm.h>
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#include "nfit_test.h"
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static LIST_HEAD(iomap_head);
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static struct iomap_ops {
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nfit_test_lookup_fn nfit_test_lookup;
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nfit_test_evaluate_dsm_fn evaluate_dsm;
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struct list_head list;
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} iomap_ops = {
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.list = LIST_HEAD_INIT(iomap_ops.list),
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};
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void nfit_test_setup(nfit_test_lookup_fn lookup,
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nfit_test_evaluate_dsm_fn evaluate)
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{
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iomap_ops.nfit_test_lookup = lookup;
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iomap_ops.evaluate_dsm = evaluate;
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list_add_rcu(&iomap_ops.list, &iomap_head);
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}
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EXPORT_SYMBOL(nfit_test_setup);
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void nfit_test_teardown(void)
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{
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list_del_rcu(&iomap_ops.list);
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synchronize_rcu();
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}
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EXPORT_SYMBOL(nfit_test_teardown);
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static struct nfit_test_resource *__get_nfit_res(resource_size_t resource)
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{
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struct iomap_ops *ops;
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ops = list_first_or_null_rcu(&iomap_head, typeof(*ops), list);
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if (ops)
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return ops->nfit_test_lookup(resource);
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return NULL;
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}
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struct nfit_test_resource *get_nfit_res(resource_size_t resource)
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{
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struct nfit_test_resource *res;
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rcu_read_lock();
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res = __get_nfit_res(resource);
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rcu_read_unlock();
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return res;
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}
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EXPORT_SYMBOL(get_nfit_res);
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void __iomem *__nfit_test_ioremap(resource_size_t offset, unsigned long size,
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void __iomem *(*fallback_fn)(resource_size_t, unsigned long))
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{
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struct nfit_test_resource *nfit_res = get_nfit_res(offset);
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if (nfit_res)
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return (void __iomem *) nfit_res->buf + offset
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- nfit_res->res.start;
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return fallback_fn(offset, size);
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}
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void __iomem *__wrap_devm_ioremap_nocache(struct device *dev,
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resource_size_t offset, unsigned long size)
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{
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struct nfit_test_resource *nfit_res = get_nfit_res(offset);
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if (nfit_res)
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return (void __iomem *) nfit_res->buf + offset
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- nfit_res->res.start;
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return devm_ioremap_nocache(dev, offset, size);
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}
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EXPORT_SYMBOL(__wrap_devm_ioremap_nocache);
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void *__wrap_devm_memremap(struct device *dev, resource_size_t offset,
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size_t size, unsigned long flags)
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{
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struct nfit_test_resource *nfit_res = get_nfit_res(offset);
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if (nfit_res)
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return nfit_res->buf + offset - nfit_res->res.start;
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return devm_memremap(dev, offset, size, flags);
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}
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EXPORT_SYMBOL(__wrap_devm_memremap);
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static void nfit_test_kill(void *_pgmap)
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{
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struct dev_pagemap *pgmap = _pgmap;
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WARN_ON(!pgmap || !pgmap->ref);
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if (pgmap->ops && pgmap->ops->kill)
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pgmap->ops->kill(pgmap);
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else
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percpu_ref_kill(pgmap->ref);
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if (pgmap->ops && pgmap->ops->cleanup) {
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pgmap->ops->cleanup(pgmap);
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} else {
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wait_for_completion(&pgmap->done);
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percpu_ref_exit(pgmap->ref);
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}
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}
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static void dev_pagemap_percpu_release(struct percpu_ref *ref)
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{
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struct dev_pagemap *pgmap =
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container_of(ref, struct dev_pagemap, internal_ref);
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complete(&pgmap->done);
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}
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void *__wrap_devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap)
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{
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int error;
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resource_size_t offset = pgmap->res.start;
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struct nfit_test_resource *nfit_res = get_nfit_res(offset);
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if (!nfit_res)
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return devm_memremap_pages(dev, pgmap);
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if (!pgmap->ref) {
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if (pgmap->ops && (pgmap->ops->kill || pgmap->ops->cleanup))
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return ERR_PTR(-EINVAL);
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init_completion(&pgmap->done);
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error = percpu_ref_init(&pgmap->internal_ref,
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dev_pagemap_percpu_release, 0, GFP_KERNEL);
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if (error)
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return ERR_PTR(error);
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pgmap->ref = &pgmap->internal_ref;
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} else {
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if (!pgmap->ops || !pgmap->ops->kill || !pgmap->ops->cleanup) {
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WARN(1, "Missing reference count teardown definition\n");
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return ERR_PTR(-EINVAL);
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}
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}
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error = devm_add_action_or_reset(dev, nfit_test_kill, pgmap);
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if (error)
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return ERR_PTR(error);
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return nfit_res->buf + offset - nfit_res->res.start;
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}
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EXPORT_SYMBOL_GPL(__wrap_devm_memremap_pages);
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pfn_t __wrap_phys_to_pfn_t(phys_addr_t addr, unsigned long flags)
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{
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struct nfit_test_resource *nfit_res = get_nfit_res(addr);
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if (nfit_res)
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flags &= ~PFN_MAP;
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return phys_to_pfn_t(addr, flags);
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}
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EXPORT_SYMBOL(__wrap_phys_to_pfn_t);
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void *__wrap_memremap(resource_size_t offset, size_t size,
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unsigned long flags)
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{
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struct nfit_test_resource *nfit_res = get_nfit_res(offset);
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if (nfit_res)
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return nfit_res->buf + offset - nfit_res->res.start;
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return memremap(offset, size, flags);
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}
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EXPORT_SYMBOL(__wrap_memremap);
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void __wrap_devm_memunmap(struct device *dev, void *addr)
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{
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struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
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if (nfit_res)
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return;
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return devm_memunmap(dev, addr);
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}
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EXPORT_SYMBOL(__wrap_devm_memunmap);
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void __iomem *__wrap_ioremap_nocache(resource_size_t offset, unsigned long size)
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{
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return __nfit_test_ioremap(offset, size, ioremap_nocache);
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}
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EXPORT_SYMBOL(__wrap_ioremap_nocache);
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void __iomem *__wrap_ioremap_wc(resource_size_t offset, unsigned long size)
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{
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return __nfit_test_ioremap(offset, size, ioremap_wc);
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}
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EXPORT_SYMBOL(__wrap_ioremap_wc);
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void __wrap_iounmap(volatile void __iomem *addr)
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{
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struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
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if (nfit_res)
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return;
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return iounmap(addr);
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}
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EXPORT_SYMBOL(__wrap_iounmap);
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void __wrap_memunmap(void *addr)
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{
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struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
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if (nfit_res)
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return;
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return memunmap(addr);
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}
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EXPORT_SYMBOL(__wrap_memunmap);
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static bool nfit_test_release_region(struct device *dev,
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struct resource *parent, resource_size_t start,
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resource_size_t n);
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static void nfit_devres_release(struct device *dev, void *data)
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{
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struct resource *res = *((struct resource **) data);
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WARN_ON(!nfit_test_release_region(NULL, &iomem_resource, res->start,
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resource_size(res)));
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}
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static int match(struct device *dev, void *__res, void *match_data)
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{
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struct resource *res = *((struct resource **) __res);
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resource_size_t start = *((resource_size_t *) match_data);
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return res->start == start;
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}
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static bool nfit_test_release_region(struct device *dev,
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struct resource *parent, resource_size_t start,
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resource_size_t n)
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{
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if (parent == &iomem_resource) {
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struct nfit_test_resource *nfit_res = get_nfit_res(start);
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if (nfit_res) {
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struct nfit_test_request *req;
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struct resource *res = NULL;
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if (dev) {
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devres_release(dev, nfit_devres_release, match,
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&start);
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return true;
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}
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spin_lock(&nfit_res->lock);
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list_for_each_entry(req, &nfit_res->requests, list)
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if (req->res.start == start) {
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res = &req->res;
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list_del(&req->list);
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break;
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}
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spin_unlock(&nfit_res->lock);
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WARN(!res || resource_size(res) != n,
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"%s: start: %llx n: %llx mismatch: %pr\n",
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__func__, start, n, res);
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if (res)
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kfree(req);
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return true;
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}
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}
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return false;
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}
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static struct resource *nfit_test_request_region(struct device *dev,
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struct resource *parent, resource_size_t start,
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resource_size_t n, const char *name, int flags)
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{
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struct nfit_test_resource *nfit_res;
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if (parent == &iomem_resource) {
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nfit_res = get_nfit_res(start);
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if (nfit_res) {
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struct nfit_test_request *req;
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struct resource *res = NULL;
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if (start + n > nfit_res->res.start
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+ resource_size(&nfit_res->res)) {
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pr_debug("%s: start: %llx n: %llx overflow: %pr\n",
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__func__, start, n,
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&nfit_res->res);
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return NULL;
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}
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spin_lock(&nfit_res->lock);
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list_for_each_entry(req, &nfit_res->requests, list)
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if (start == req->res.start) {
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res = &req->res;
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break;
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}
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spin_unlock(&nfit_res->lock);
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if (res) {
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WARN(1, "%pr already busy\n", res);
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return NULL;
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}
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req = kzalloc(sizeof(*req), GFP_KERNEL);
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if (!req)
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return NULL;
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INIT_LIST_HEAD(&req->list);
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res = &req->res;
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res->start = start;
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res->end = start + n - 1;
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res->name = name;
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res->flags = resource_type(parent);
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res->flags |= IORESOURCE_BUSY | flags;
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spin_lock(&nfit_res->lock);
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list_add(&req->list, &nfit_res->requests);
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spin_unlock(&nfit_res->lock);
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if (dev) {
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struct resource **d;
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d = devres_alloc(nfit_devres_release,
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sizeof(struct resource *),
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GFP_KERNEL);
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if (!d)
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return NULL;
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*d = res;
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devres_add(dev, d);
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}
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pr_debug("%s: %pr\n", __func__, res);
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return res;
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}
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}
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if (dev)
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return __devm_request_region(dev, parent, start, n, name);
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return __request_region(parent, start, n, name, flags);
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}
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struct resource *__wrap___request_region(struct resource *parent,
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resource_size_t start, resource_size_t n, const char *name,
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int flags)
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{
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return nfit_test_request_region(NULL, parent, start, n, name, flags);
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}
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EXPORT_SYMBOL(__wrap___request_region);
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int __wrap_insert_resource(struct resource *parent, struct resource *res)
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{
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if (get_nfit_res(res->start))
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return 0;
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return insert_resource(parent, res);
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}
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EXPORT_SYMBOL(__wrap_insert_resource);
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int __wrap_remove_resource(struct resource *res)
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{
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if (get_nfit_res(res->start))
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return 0;
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return remove_resource(res);
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}
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EXPORT_SYMBOL(__wrap_remove_resource);
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struct resource *__wrap___devm_request_region(struct device *dev,
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struct resource *parent, resource_size_t start,
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resource_size_t n, const char *name)
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{
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if (!dev)
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return NULL;
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return nfit_test_request_region(dev, parent, start, n, name, 0);
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}
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EXPORT_SYMBOL(__wrap___devm_request_region);
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void __wrap___release_region(struct resource *parent, resource_size_t start,
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resource_size_t n)
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{
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if (!nfit_test_release_region(NULL, parent, start, n))
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__release_region(parent, start, n);
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}
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EXPORT_SYMBOL(__wrap___release_region);
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void __wrap___devm_release_region(struct device *dev, struct resource *parent,
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resource_size_t start, resource_size_t n)
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{
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if (!nfit_test_release_region(dev, parent, start, n))
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__devm_release_region(dev, parent, start, n);
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}
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EXPORT_SYMBOL(__wrap___devm_release_region);
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acpi_status __wrap_acpi_evaluate_object(acpi_handle handle, acpi_string path,
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struct acpi_object_list *p, struct acpi_buffer *buf)
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{
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struct nfit_test_resource *nfit_res = get_nfit_res((long) handle);
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union acpi_object **obj;
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if (!nfit_res || strcmp(path, "_FIT") || !buf)
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return acpi_evaluate_object(handle, path, p, buf);
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obj = nfit_res->buf;
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buf->length = sizeof(union acpi_object);
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buf->pointer = *obj;
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return AE_OK;
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}
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EXPORT_SYMBOL(__wrap_acpi_evaluate_object);
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union acpi_object * __wrap_acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid,
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u64 rev, u64 func, union acpi_object *argv4)
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{
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union acpi_object *obj = ERR_PTR(-ENXIO);
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struct iomap_ops *ops;
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rcu_read_lock();
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ops = list_first_or_null_rcu(&iomap_head, typeof(*ops), list);
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if (ops)
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obj = ops->evaluate_dsm(handle, guid, rev, func, argv4);
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rcu_read_unlock();
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if (IS_ERR(obj))
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return acpi_evaluate_dsm(handle, guid, rev, func, argv4);
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return obj;
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}
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EXPORT_SYMBOL(__wrap_acpi_evaluate_dsm);
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MODULE_LICENSE("GPL v2");
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