From f295e53b60eb93ee53ed5ac610374ed293caa57b Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Fri, 17 Jun 2016 11:08:06 -0700 Subject: libnvdimm, pmem: allow nfit_test to override pmem_direct_access() Currently phys_to_pfn_t() is an exported symbol to allow nfit_test to override it and indicate that nfit_test-pmem is not device-mapped. Now, we want to enable nfit_test to operate without DMA_CMA and the pmem it provides will no longer be physically contiguous, i.e. won't be capable of supporting direct_access requests larger than a page. Make pmem_direct_access() a weak symbol so that it can be replaced by the tools/testing/nvdimm/ version, and move phys_to_pfn_t() to a static inline now that it no longer needs to be overridden. Acked-by: Johannes Thumshirn Signed-off-by: Dan Williams --- tools/testing/nvdimm/Kbuild | 3 ++- tools/testing/nvdimm/pmem-dax.c | 42 +++++++++++++++++++++++++++++++++++ tools/testing/nvdimm/test/iomap.c | 3 ++- tools/testing/nvdimm/test/nfit_test.h | 2 ++ 4 files changed, 48 insertions(+), 2 deletions(-) create mode 100644 tools/testing/nvdimm/pmem-dax.c (limited to 'tools/testing') diff --git a/tools/testing/nvdimm/Kbuild b/tools/testing/nvdimm/Kbuild index 785985677159..4adfa9cdf26f 100644 --- a/tools/testing/nvdimm/Kbuild +++ b/tools/testing/nvdimm/Kbuild @@ -11,12 +11,12 @@ ldflags-y += --wrap=__devm_release_region ldflags-y += --wrap=__request_region ldflags-y += --wrap=__release_region ldflags-y += --wrap=devm_memremap_pages -ldflags-y += --wrap=phys_to_pfn_t DRIVERS := ../../../drivers NVDIMM_SRC := $(DRIVERS)/nvdimm ACPI_SRC := $(DRIVERS)/acpi DAX_SRC := $(DRIVERS)/dax +ccflags-y := -I$(src)/$(NVDIMM_SRC)/ obj-$(CONFIG_LIBNVDIMM) += libnvdimm.o obj-$(CONFIG_BLK_DEV_PMEM) += nd_pmem.o @@ -31,6 +31,7 @@ nfit-y := $(ACPI_SRC)/nfit.o nfit-y += config_check.o nd_pmem-y := $(NVDIMM_SRC)/pmem.o +nd_pmem-y += pmem-dax.o nd_pmem-y += config_check.o nd_btt-y := $(NVDIMM_SRC)/btt.o diff --git a/tools/testing/nvdimm/pmem-dax.c b/tools/testing/nvdimm/pmem-dax.c new file mode 100644 index 000000000000..fdba77f2bb06 --- /dev/null +++ b/tools/testing/nvdimm/pmem-dax.c @@ -0,0 +1,42 @@ +/* + * Copyright (c) 2014-2016, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ +#include "test/nfit_test.h" +#include +#include +#include + +long pmem_direct_access(struct block_device *bdev, sector_t sector, + void __pmem **kaddr, pfn_t *pfn, long size) +{ + struct pmem_device *pmem = bdev->bd_queue->queuedata; + resource_size_t offset = sector * 512 + pmem->data_offset; + + /* disable DAX for nfit_test pmem devices */ + if (get_nfit_res(pmem->phys_addr + offset)) { + dev_info_once(pmem->bb.dev, "dax is disabled for nfit_test\n"); + return -EIO; + } + + if (unlikely(is_bad_pmem(&pmem->bb, sector, size))) + return -EIO; + *kaddr = pmem->virt_addr + offset; + *pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags); + + /* + * If badblocks are present, limit known good range to the + * requested range. + */ + if (unlikely(pmem->bb.count)) + return size; + return pmem->size - pmem->pfn_pad - offset; +} diff --git a/tools/testing/nvdimm/test/iomap.c b/tools/testing/nvdimm/test/iomap.c index c842095f2801..9966f093b4ff 100644 --- a/tools/testing/nvdimm/test/iomap.c +++ b/tools/testing/nvdimm/test/iomap.c @@ -52,7 +52,7 @@ static struct nfit_test_resource *__get_nfit_res(resource_size_t resource) return NULL; } -static struct nfit_test_resource *get_nfit_res(resource_size_t resource) +struct nfit_test_resource *get_nfit_res(resource_size_t resource) { struct nfit_test_resource *res; @@ -62,6 +62,7 @@ static struct nfit_test_resource *get_nfit_res(resource_size_t resource) return res; } +EXPORT_SYMBOL(get_nfit_res); void __iomem *__nfit_test_ioremap(resource_size_t offset, unsigned long size, void __iomem *(*fallback_fn)(resource_size_t, unsigned long)) diff --git a/tools/testing/nvdimm/test/nfit_test.h b/tools/testing/nvdimm/test/nfit_test.h index 96c5e16d7db9..9f18e2a4a862 100644 --- a/tools/testing/nvdimm/test/nfit_test.h +++ b/tools/testing/nvdimm/test/nfit_test.h @@ -12,6 +12,7 @@ */ #ifndef __NFIT_TEST_H__ #define __NFIT_TEST_H__ +#include struct nfit_test_resource { struct list_head list; @@ -26,4 +27,5 @@ void __iomem *__wrap_ioremap_nocache(resource_size_t offset, void __wrap_iounmap(volatile void __iomem *addr); void nfit_test_setup(nfit_test_lookup_fn lookup); void nfit_test_teardown(void); +struct nfit_test_resource *get_nfit_res(resource_size_t resource); #endif -- cgit v1.2.3-59-g8ed1b