A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-31 04:01:48 -04:00
Code Issues Projects Releases Packages Wiki Activity

libnvdimm for 4.3:

Browse source 
1/ Introduce ZONE_DEVICE and devm_memremap_pages() as a generic
    mechanism for adding device-driver-discovered memory regions to the
    kernel's direct map.  This facility is used by the pmem driver to
    enable pfn_to_page() operations on the page frames returned by DAX
    ('direct_access' in 'struct block_device_operations'). For now, the
    'memmap' allocation for these "device" pages comes from "System
    RAM".  Support for allocating the memmap from device memory will
    arrive in a later kernel.
 
 2/ Introduce memremap() to replace usages of ioremap_cache() and
    ioremap_wt().  memremap() drops the __iomem annotation for these
    mappings to memory that do not have i/o side effects.  The
    replacement of ioremap_cache() with memremap() is limited to the
    pmem driver to ease merging the api change in v4.3.  Completion of
    the conversion is targeted for v4.4.
 
 3/ Similar to the usage of memcpy_to_pmem() + wmb_pmem() in the pmem
    driver, update the VFS DAX implementation and PMEM api to provide
    persistence guarantees for kernel operations on a DAX mapping.
 
 4/ Convert the ACPI NFIT 'BLK' driver to map the block apertures as
    cacheable to improve performance.
 
 5/ Miscellaneous updates and fixes to libnvdimm including support
    for issuing "address range scrub" commands, clarifying the optimal
    'sector size' of pmem devices, a clarification of the usage of the
    ACPI '_STA' (status) property for DIMM devices, and other minor
    fixes.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJV6Nx7AAoJEB7SkWpmfYgCWyYQAI5ju6Gvw27RNFtPovHcZUf5
 JGnxXejI6/AqeTQ+IulgprxtEUCrXOHjCDA5dkjr1qvsoqK1qxug+vJHOZLgeW0R
 OwDtmdW4Qrgeqm+CPoxETkorJ8wDOc8mol81kTiMgeV3UqbYeeHIiTAmwe7VzZ0C
 nNdCRDm5g8dHCjTKcvK3rvozgyoNoWeBiHkPe76EbnxDICxCB5dak7XsVKNMIVFQ
 NuYlnw6IYN7+rMHgpgpRux38NtIW8VlYPWTmHExejc2mlioWMNBG/bmtwLyJ6M3e
 zliz4/cnonTMUaizZaVozyinTa65m7wcnpjK+vlyGV2deDZPJpDRvSOtB0lH30bR
 1gy+qrKzuGKpaN6thOISxFLLjmEeYwzYd7SvC9n118r32qShz+opN9XX0WmWSFlA
 sajE1ehm4M7s5pkMoa/dRnAyR8RUPu4RNINdQ/Z9jFfAOx+Q26rLdQXwf9+uqbEb
 bIeSQwOteK5vYYCstvpAcHSMlJAglzIX5UfZBvtEIJN7rlb0VhmGWfxAnTu+ktG1
 o9cqAt+J4146xHaFwj5duTsyKhWb8BL9+xqbKPNpXEp+PbLsrnE/+WkDLFD67jxz
 dgIoK60mGnVXp+16I2uMqYYDgAyO5zUdmM4OygOMnZNa1mxesjbDJC6Wat1Wsndn
 slsw6DkrWT60CRE42nbK
 =o57/
 -----END PGP SIGNATURE-----

Merge tag 'libnvdimm-for-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm updates from Dan Williams:
 "This update has successfully completed a 0day-kbuild run and has
  appeared in a linux-next release.  The changes outside of the typical
  drivers/nvdimm/ and drivers/acpi/nfit.[ch] paths are related to the
  removal of IORESOURCE_CACHEABLE, the introduction of memremap(), and
  the introduction of ZONE_DEVICE + devm_memremap_pages().

  Summary:

   - Introduce ZONE_DEVICE and devm_memremap_pages() as a generic
     mechanism for adding device-driver-discovered memory regions to the
     kernel's direct map.

     This facility is used by the pmem driver to enable pfn_to_page()
     operations on the page frames returned by DAX ('direct_access' in
     'struct block_device_operations').

     For now, the 'memmap' allocation for these "device" pages comes
     from "System RAM".  Support for allocating the memmap from device
     memory will arrive in a later kernel.

   - Introduce memremap() to replace usages of ioremap_cache() and
     ioremap_wt().  memremap() drops the __iomem annotation for these
     mappings to memory that do not have i/o side effects.  The
     replacement of ioremap_cache() with memremap() is limited to the
     pmem driver to ease merging the api change in v4.3.

     Completion of the conversion is targeted for v4.4.

   - Similar to the usage of memcpy_to_pmem() + wmb_pmem() in the pmem
     driver, update the VFS DAX implementation and PMEM api to provide
     persistence guarantees for kernel operations on a DAX mapping.

   - Convert the ACPI NFIT 'BLK' driver to map the block apertures as
     cacheable to improve performance.

   - Miscellaneous updates and fixes to libnvdimm including support for
     issuing "address range scrub" commands, clarifying the optimal
     'sector size' of pmem devices, a clarification of the usage of the
     ACPI '_STA' (status) property for DIMM devices, and other minor
     fixes"

* tag 'libnvdimm-for-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (34 commits)
  libnvdimm, pmem: direct map legacy pmem by default
  libnvdimm, pmem: 'struct page' for pmem
  libnvdimm, pfn: 'struct page' provider infrastructure
  x86, pmem: clarify that ARCH_HAS_PMEM_API implies PMEM mapped WB
  add devm_memremap_pages
  mm: ZONE_DEVICE for "device memory"
  mm: move __phys_to_pfn and __pfn_to_phys to asm/generic/memory_model.h
  dax: drop size parameter to ->direct_access()
  nd_blk: change aperture mapping from WC to WB
  nvdimm: change to use generic kvfree()
  pmem, dax: have direct_access use __pmem annotation
  dax: update I/O path to do proper PMEM flushing
  pmem: add copy_from_iter_pmem() and clear_pmem()
  pmem, x86: clean up conditional pmem includes
  pmem: remove layer when calling arch_has_wmb_pmem()
  pmem, x86: move x86 PMEM API to new pmem.h header
  libnvdimm, e820: make CONFIG_X86_PMEM_LEGACY a tristate option
  pmem: switch to devm_ allocations
  devres: add devm_memremap
  libnvdimm, btt: write and validate parent_uuid
  ...
This commit is contained in:
Linus Torvalds 2015-09-08 14:35:59 -07:00
commit 12f03ee606
92 changed files with 2142 additions and 745 deletions
Download patch file Download diff file Expand all files Collapse all files

1
drivers/acpi/Kconfig
View file

@ -417,6 +417,7 @@ config ACPI_NFIT
tristate "ACPI NVDIMM Firmware Interface Table (NFIT)"
depends on PHYS_ADDR_T_64BIT
depends on BLK_DEV
depends on ARCH_HAS_MMIO_FLUSH
select LIBNVDIMM
help
Infrastructure to probe ACPI 6 compliant platforms for

79
drivers/acpi/nfit.c
View file

@ -20,6 +20,7 @@
#include <linux/sort.h>
#include <linux/pmem.h>
#include <linux/io.h>
#include <asm/cacheflush.h>
#include "nfit.h"
/*
@ -764,9 +765,7 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
struct acpi_device *adev, *adev_dimm;
struct device *dev = acpi_desc->dev;
const u8 *uuid = to_nfit_uuid(NFIT_DEV_DIMM);
unsigned long long sta;
int i, rc = -ENODEV;
acpi_status status;
int i;
nfit_mem->dsm_mask = acpi_desc->dimm_dsm_force_en;
adev = to_acpi_dev(acpi_desc);
@ -781,25 +780,11 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
return force_enable_dimms ? 0 : -ENODEV;
}
status = acpi_evaluate_integer(adev_dimm->handle, "_STA", NULL, &sta);
if (status == AE_NOT_FOUND) {
dev_dbg(dev, "%s missing _STA, assuming enabled...\n",
dev_name(&adev_dimm->dev));
rc = 0;
} else if (ACPI_FAILURE(status))
dev_err(dev, "%s failed to retrieve_STA, disabling...\n",
dev_name(&adev_dimm->dev));
else if ((sta & ACPI_STA_DEVICE_ENABLED) == 0)
dev_info(dev, "%s disabled by firmware\n",
dev_name(&adev_dimm->dev));
else
rc = 0;
for (i = ND_CMD_SMART; i <= ND_CMD_VENDOR; i++)
if (acpi_check_dsm(adev_dimm->handle, uuid, 1, 1ULL << i))
set_bit(i, &nfit_mem->dsm_mask);
return force_enable_dimms ? 0 : rc;
return 0;
}
static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
@ -868,6 +853,7 @@ static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc)
struct acpi_device *adev;
int i;
nd_desc->dsm_mask = acpi_desc->bus_dsm_force_en;
adev = to_acpi_dev(acpi_desc);
if (!adev)
return;
@ -1032,7 +1018,7 @@ static u32 read_blk_stat(struct nfit_blk *nfit_blk, unsigned int bw)
if (mmio->num_lines)
offset = to_interleave_offset(offset, mmio);
return readl(mmio->base + offset);
return readl(mmio->addr.base + offset);
}
static void write_blk_ctl(struct nfit_blk *nfit_blk, unsigned int bw,
@ -1057,11 +1043,11 @@ static void write_blk_ctl(struct nfit_blk *nfit_blk, unsigned int bw,
if (mmio->num_lines)
offset = to_interleave_offset(offset, mmio);
writeq(cmd, mmio->base + offset);
writeq(cmd, mmio->addr.base + offset);
wmb_blk(nfit_blk);
if (nfit_blk->dimm_flags & ND_BLK_DCR_LATCH)
readq(mmio->base + offset);
readq(mmio->addr.base + offset);
}
static int acpi_nfit_blk_single_io(struct nfit_blk *nfit_blk,
@ -1093,11 +1079,16 @@ static int acpi_nfit_blk_single_io(struct nfit_blk *nfit_blk,
}
if (rw)
memcpy_to_pmem(mmio->aperture + offset,
memcpy_to_pmem(mmio->addr.aperture + offset,
iobuf + copied, c);
else
else {
if (nfit_blk->dimm_flags & ND_BLK_READ_FLUSH)
mmio_flush_range((void __force *)
mmio->addr.aperture + offset, c);
memcpy_from_pmem(iobuf + copied,
mmio->aperture + offset, c);
mmio->addr.aperture + offset, c);
}
copied += c;
len -= c;
@ -1144,7 +1135,10 @@ static void nfit_spa_mapping_release(struct kref *kref)
WARN_ON(!mutex_is_locked(&acpi_desc->spa_map_mutex));
dev_dbg(acpi_desc->dev, "%s: SPA%d\n", __func__, spa->range_index);
iounmap(spa_map->iomem);
if (spa_map->type == SPA_MAP_APERTURE)
memunmap((void __force *)spa_map->addr.aperture);
else
iounmap(spa_map->addr.base);
release_mem_region(spa->address, spa->length);
list_del(&spa_map->list);
kfree(spa_map);
@ -1190,7 +1184,7 @@ static void __iomem *__nfit_spa_map(struct acpi_nfit_desc *acpi_desc,
spa_map = find_spa_mapping(acpi_desc, spa);
if (spa_map) {
kref_get(&spa_map->kref);
return spa_map->iomem;
return spa_map->addr.base;
}
spa_map = kzalloc(sizeof(*spa_map), GFP_KERNEL);
@ -1206,20 +1200,19 @@ static void __iomem *__nfit_spa_map(struct acpi_nfit_desc *acpi_desc,
if (!res)
goto err_mem;
if (type == SPA_MAP_APERTURE) {
/*
* TODO: memremap_pmem() support, but that requires cache
* flushing when the aperture is moved.
*/
spa_map->iomem = ioremap_wc(start, n);
} else
spa_map->iomem = ioremap_nocache(start, n);
spa_map->type = type;
if (type == SPA_MAP_APERTURE)
spa_map->addr.aperture = (void __pmem *)memremap(start, n,
ARCH_MEMREMAP_PMEM);
else
spa_map->addr.base = ioremap_nocache(start, n);
if (!spa_map->iomem)
if (!spa_map->addr.base)
goto err_map;
list_add_tail(&spa_map->list, &acpi_desc->spa_maps);
return spa_map->iomem;
return spa_map->addr.base;
err_map:
release_mem_region(start, n);
@ -1282,7 +1275,7 @@ static int acpi_nfit_blk_get_flags(struct nvdimm_bus_descriptor *nd_desc,
nfit_blk->dimm_flags = flags.flags;
else if (rc == -ENOTTY) {
/* fall back to a conservative default */
nfit_blk->dimm_flags = ND_BLK_DCR_LATCH;
nfit_blk->dimm_flags = ND_BLK_DCR_LATCH | ND_BLK_READ_FLUSH;
rc = 0;
} else
rc = -ENXIO;
@ -1322,9 +1315,9 @@ static int acpi_nfit_blk_region_enable(struct nvdimm_bus *nvdimm_bus,
/* map block aperture memory */
nfit_blk->bdw_offset = nfit_mem->bdw->offset;
mmio = &nfit_blk->mmio[BDW];
mmio->base = nfit_spa_map(acpi_desc, nfit_mem->spa_bdw,
mmio->addr.base = nfit_spa_map(acpi_desc, nfit_mem->spa_bdw,
SPA_MAP_APERTURE);
if (!mmio->base) {
if (!mmio->addr.base) {
dev_dbg(dev, "%s: %s failed to map bdw\n", __func__,
nvdimm_name(nvdimm));
return -ENOMEM;
@ -1345,9 +1338,9 @@ static int acpi_nfit_blk_region_enable(struct nvdimm_bus *nvdimm_bus,
nfit_blk->cmd_offset = nfit_mem->dcr->command_offset;
nfit_blk->stat_offset = nfit_mem->dcr->status_offset;
mmio = &nfit_blk->mmio[DCR];
mmio->base = nfit_spa_map(acpi_desc, nfit_mem->spa_dcr,
mmio->addr.base = nfit_spa_map(acpi_desc, nfit_mem->spa_dcr,
SPA_MAP_CONTROL);
if (!mmio->base) {
if (!mmio->addr.base) {
dev_dbg(dev, "%s: %s failed to map dcr\n", __func__,
nvdimm_name(nvdimm));
return -ENOMEM;
@ -1379,7 +1372,7 @@ static int acpi_nfit_blk_region_enable(struct nvdimm_bus *nvdimm_bus,
return -ENOMEM;
}
if (!arch_has_pmem_api() && !nfit_blk->nvdimm_flush)
if (!arch_has_wmb_pmem() && !nfit_blk->nvdimm_flush)
dev_warn(dev, "unable to guarantee persistence of writes\n");
if (mmio->line_size == 0)
@ -1414,7 +1407,7 @@ static void acpi_nfit_blk_region_disable(struct nvdimm_bus *nvdimm_bus,
for (i = 0; i < 2; i++) {
struct nfit_blk_mmio *mmio = &nfit_blk->mmio[i];
if (mmio->base)
if (mmio->addr.base)
nfit_spa_unmap(acpi_desc, mmio->spa);
}
nd_blk_region_set_provider_data(ndbr, NULL);

17
drivers/acpi/nfit.h
View file

@ -41,6 +41,7 @@ enum nfit_uuids {
};
enum {
ND_BLK_READ_FLUSH = 1,
ND_BLK_DCR_LATCH = 2,
};
@ -107,6 +108,7 @@ struct acpi_nfit_desc {
struct nvdimm_bus *nvdimm_bus;
struct device *dev;
unsigned long dimm_dsm_force_en;
unsigned long bus_dsm_force_en;
int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
void *iobuf, u64 len, int rw);
};
@ -116,12 +118,16 @@ enum nd_blk_mmio_selector {
DCR,
};
struct nd_blk_addr {
union {
void __iomem *base;
void __pmem *aperture;
};
};
struct nfit_blk {
struct nfit_blk_mmio {
union {
void __iomem *base;
void __pmem *aperture;
};
struct nd_blk_addr addr;
u64 size;
u64 base_offset;
u32 line_size;
@ -148,7 +154,8 @@ struct nfit_spa_mapping {
struct acpi_nfit_system_address *spa;
struct list_head list;
struct kref kref;
void __iomem *iomem;
enum spa_map_type type;
struct nd_blk_addr addr;
};
static inline struct nfit_spa_mapping *to_spa_map(struct kref *kref)