Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-08 15:04:45 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

ACPI: NFIT: Remove block aperture support

Browse Source 
Delete the code to parse interleave-descriptor-tables and coordinate I/O
through a BLK aperture.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/164688418240.2879318.400185926874596938.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2022-03-09 19:49:42 -08:00
parent 84bd3690bf
commit a4b96046a8
3 changed files with 0 additions and 405 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

376
drivers/acpi/nfit/core.c
View File

@ -999,80 +999,6 @@ static void *add_table(struct acpi_nfit_desc *acpi_desc,
return table + hdr->length; return table + hdr->length;
} }
static void nfit_mem_find_spa_bdw(struct acpi_nfit_desc *acpi_desc,
struct nfit_mem *nfit_mem)
{
u32 device_handle = __to_nfit_memdev(nfit_mem)->device_handle;
u16 dcr = nfit_mem->dcr->region_index;
struct nfit_spa *nfit_spa;
list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
u16 range_index = nfit_spa->spa->range_index;
int type = nfit_spa_type(nfit_spa->spa);
struct nfit_memdev *nfit_memdev;
if (type != NFIT_SPA_BDW)
continue;
list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
if (nfit_memdev->memdev->range_index != range_index)
continue;
if (nfit_memdev->memdev->device_handle != device_handle)
continue;
if (nfit_memdev->memdev->region_index != dcr)
continue;
nfit_mem->spa_bdw = nfit_spa->spa;
return;
}
}
dev_dbg(acpi_desc->dev, "SPA-BDW not found for SPA-DCR %d\n",
nfit_mem->spa_dcr->range_index);
nfit_mem->bdw = NULL;
}
static void nfit_mem_init_bdw(struct acpi_nfit_desc *acpi_desc,
struct nfit_mem *nfit_mem, struct acpi_nfit_system_address *spa)
{
u16 dcr = __to_nfit_memdev(nfit_mem)->region_index;
struct nfit_memdev *nfit_memdev;
struct nfit_bdw *nfit_bdw;
struct nfit_idt *nfit_idt;
u16 idt_idx, range_index;
list_for_each_entry(nfit_bdw, &acpi_desc->bdws, list) {
if (nfit_bdw->bdw->region_index != dcr)
continue;
nfit_mem->bdw = nfit_bdw->bdw;
break;
}
if (!nfit_mem->bdw)
return;
nfit_mem_find_spa_bdw(acpi_desc, nfit_mem);
if (!nfit_mem->spa_bdw)
return;
range_index = nfit_mem->spa_bdw->range_index;
list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
if (nfit_memdev->memdev->range_index != range_index ||
nfit_memdev->memdev->region_index != dcr)
continue;
nfit_mem->memdev_bdw = nfit_memdev->memdev;
idt_idx = nfit_memdev->memdev->interleave_index;
list_for_each_entry(nfit_idt, &acpi_desc->idts, list) {
if (nfit_idt->idt->interleave_index != idt_idx)
continue;
nfit_mem->idt_bdw = nfit_idt->idt;
break;
}
break;
}
}
static int __nfit_mem_init(struct acpi_nfit_desc *acpi_desc, static int __nfit_mem_init(struct acpi_nfit_desc *acpi_desc,
struct acpi_nfit_system_address *spa) struct acpi_nfit_system_address *spa)
{ {
@ -1189,7 +1115,6 @@ static int __nfit_mem_init(struct acpi_nfit_desc *acpi_desc,
nfit_mem->idt_dcr = nfit_idt->idt; nfit_mem->idt_dcr = nfit_idt->idt;
break; break;
} }
nfit_mem_init_bdw(acpi_desc, nfit_mem, spa);
} else if (type == NFIT_SPA_PM) { } else if (type == NFIT_SPA_PM) {
/* /*
* A single dimm may belong to multiple SPA-PM * A single dimm may belong to multiple SPA-PM
@ -1532,8 +1457,6 @@ static int num_nvdimm_formats(struct nvdimm *nvdimm)
if (nfit_mem->memdev_pmem) if (nfit_mem->memdev_pmem)
formats++; formats++;
if (nfit_mem->memdev_bdw)
formats++;
return formats; return formats;
} }
@ -2079,11 +2002,6 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
continue; continue;
} }
if (nfit_mem->bdw && nfit_mem->memdev_pmem) {
set_bit(NDD_ALIASING, &flags);
set_bit(NDD_LABELING, &flags);
}
/* collate flags across all memdevs for this dimm */ /* collate flags across all memdevs for this dimm */
list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) { list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
struct acpi_nfit_memory_map *dimm_memdev; struct acpi_nfit_memory_map *dimm_memdev;
@ -2429,272 +2347,6 @@ static int acpi_nfit_init_interleave_set(struct acpi_nfit_desc *acpi_desc,
return 0; return 0;
} }
static u64 to_interleave_offset(u64 offset, struct nfit_blk_mmio *mmio)
{
struct acpi_nfit_interleave *idt = mmio->idt;
u32 sub_line_offset, line_index, line_offset;
u64 line_no, table_skip_count, table_offset;
line_no = div_u64_rem(offset, mmio->line_size, &sub_line_offset);
table_skip_count = div_u64_rem(line_no, mmio->num_lines, &line_index);
line_offset = idt->line_offset[line_index]
* mmio->line_size;
table_offset = table_skip_count * mmio->table_size;
return mmio->base_offset + line_offset + table_offset + sub_line_offset;
}
static u32 read_blk_stat(struct nfit_blk *nfit_blk, unsigned int bw)
{
struct nfit_blk_mmio *mmio = &nfit_blk->mmio[DCR];
u64 offset = nfit_blk->stat_offset + mmio->size * bw;
const u32 STATUS_MASK = 0x80000037;
if (mmio->num_lines)
offset = to_interleave_offset(offset, mmio);
return readl(mmio->addr.base + offset) & STATUS_MASK;
}
static void write_blk_ctl(struct nfit_blk *nfit_blk, unsigned int bw,
resource_size_t dpa, unsigned int len, unsigned int write)
{
u64 cmd, offset;
struct nfit_blk_mmio *mmio = &nfit_blk->mmio[DCR];
enum {
BCW_OFFSET_MASK = (1ULL << 48)-1,
BCW_LEN_SHIFT = 48,
BCW_LEN_MASK = (1ULL << 8) - 1,
BCW_CMD_SHIFT = 56,
};
cmd = (dpa >> L1_CACHE_SHIFT) & BCW_OFFSET_MASK;
len = len >> L1_CACHE_SHIFT;
cmd |= ((u64) len & BCW_LEN_MASK) << BCW_LEN_SHIFT;
cmd |= ((u64) write) << BCW_CMD_SHIFT;
offset = nfit_blk->cmd_offset + mmio->size * bw;
if (mmio->num_lines)
offset = to_interleave_offset(offset, mmio);
writeq(cmd, mmio->addr.base + offset);
nvdimm_flush(nfit_blk->nd_region, NULL);
if (nfit_blk->dimm_flags & NFIT_BLK_DCR_LATCH)
readq(mmio->addr.base + offset);
}
static int acpi_nfit_blk_single_io(struct nfit_blk *nfit_blk,
resource_size_t dpa, void *iobuf, size_t len, int rw,
unsigned int lane)
{
struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW];
unsigned int copied = 0;
u64 base_offset;
int rc;
base_offset = nfit_blk->bdw_offset + dpa % L1_CACHE_BYTES
+ lane * mmio->size;
write_blk_ctl(nfit_blk, lane, dpa, len, rw);
while (len) {
unsigned int c;
u64 offset;
if (mmio->num_lines) {
u32 line_offset;
offset = to_interleave_offset(base_offset + copied,
mmio);
div_u64_rem(offset, mmio->line_size, &line_offset);
c = min_t(size_t, len, mmio->line_size - line_offset);
} else {
offset = base_offset + nfit_blk->bdw_offset;
c = len;
}
if (rw)
memcpy_flushcache(mmio->addr.aperture + offset, iobuf + copied, c);
else {
if (nfit_blk->dimm_flags & NFIT_BLK_READ_FLUSH)
arch_invalidate_pmem((void __force *)
mmio->addr.aperture + offset, c);
memcpy(iobuf + copied, mmio->addr.aperture + offset, c);
}
copied += c;
len -= c;
}
if (rw)
nvdimm_flush(nfit_blk->nd_region, NULL);
rc = read_blk_stat(nfit_blk, lane) ? -EIO : 0;
return rc;
}
static int acpi_nfit_blk_region_do_io(struct nd_blk_region *ndbr,
resource_size_t dpa, void *iobuf, u64 len, int rw)
{
struct nfit_blk *nfit_blk = nd_blk_region_provider_data(ndbr);
struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW];
struct nd_region *nd_region = nfit_blk->nd_region;
unsigned int lane, copied = 0;
int rc = 0;
lane = nd_region_acquire_lane(nd_region);
while (len) {
u64 c = min(len, mmio->size);
rc = acpi_nfit_blk_single_io(nfit_blk, dpa + copied,
iobuf + copied, c, rw, lane);
if (rc)
break;
copied += c;
len -= c;
}
nd_region_release_lane(nd_region, lane);
return rc;
}
static int nfit_blk_init_interleave(struct nfit_blk_mmio *mmio,
struct acpi_nfit_interleave *idt, u16 interleave_ways)
{
if (idt) {
mmio->num_lines = idt->line_count;
mmio->line_size = idt->line_size;
if (interleave_ways == 0)
return -ENXIO;
mmio->table_size = mmio->num_lines * interleave_ways
* mmio->line_size;
}
return 0;
}
static int acpi_nfit_blk_get_flags(struct nvdimm_bus_descriptor *nd_desc,
struct nvdimm *nvdimm, struct nfit_blk *nfit_blk)
{
struct nd_cmd_dimm_flags flags;
int rc;
memset(&flags, 0, sizeof(flags));
rc = nd_desc->ndctl(nd_desc, nvdimm, ND_CMD_DIMM_FLAGS, &flags,
sizeof(flags), NULL);
if (rc >= 0 && flags.status == 0)
nfit_blk->dimm_flags = flags.flags;
else if (rc == -ENOTTY) {
/* fall back to a conservative default */
nfit_blk->dimm_flags = NFIT_BLK_DCR_LATCH | NFIT_BLK_READ_FLUSH;
rc = 0;
} else
rc = -ENXIO;
return rc;
}
static int acpi_nfit_blk_region_enable(struct nvdimm_bus *nvdimm_bus,
struct device *dev)
{
struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
struct nd_blk_region *ndbr = to_nd_blk_region(dev);
struct nfit_blk_mmio *mmio;
struct nfit_blk *nfit_blk;
struct nfit_mem *nfit_mem;
struct nvdimm *nvdimm;
int rc;
nvdimm = nd_blk_region_to_dimm(ndbr);
nfit_mem = nvdimm_provider_data(nvdimm);
if (!nfit_mem || !nfit_mem->dcr || !nfit_mem->bdw) {
dev_dbg(dev, "missing%s%s%s\n",
nfit_mem ? "" : " nfit_mem",
(nfit_mem && nfit_mem->dcr) ? "" : " dcr",
(nfit_mem && nfit_mem->bdw) ? "" : " bdw");
return -ENXIO;
}
nfit_blk = devm_kzalloc(dev, sizeof(*nfit_blk), GFP_KERNEL);
if (!nfit_blk)
return -ENOMEM;
nd_blk_region_set_provider_data(ndbr, nfit_blk);
nfit_blk->nd_region = to_nd_region(dev);
/* map block aperture memory */
nfit_blk->bdw_offset = nfit_mem->bdw->offset;
mmio = &nfit_blk->mmio[BDW];
mmio->addr.base = devm_nvdimm_memremap(dev, nfit_mem->spa_bdw->address,
nfit_mem->spa_bdw->length, nd_blk_memremap_flags(ndbr));
if (!mmio->addr.base) {
dev_dbg(dev, "%s failed to map bdw\n",
nvdimm_name(nvdimm));
return -ENOMEM;
}
mmio->size = nfit_mem->bdw->size;
mmio->base_offset = nfit_mem->memdev_bdw->region_offset;
mmio->idt = nfit_mem->idt_bdw;
mmio->spa = nfit_mem->spa_bdw;
rc = nfit_blk_init_interleave(mmio, nfit_mem->idt_bdw,
nfit_mem->memdev_bdw->interleave_ways);
if (rc) {
dev_dbg(dev, "%s failed to init bdw interleave\n",
nvdimm_name(nvdimm));
return rc;
}
/* map block control memory */
nfit_blk->cmd_offset = nfit_mem->dcr->command_offset;
nfit_blk->stat_offset = nfit_mem->dcr->status_offset;
mmio = &nfit_blk->mmio[DCR];
mmio->addr.base = devm_nvdimm_ioremap(dev, nfit_mem->spa_dcr->address,
nfit_mem->spa_dcr->length);
if (!mmio->addr.base) {
dev_dbg(dev, "%s failed to map dcr\n",
nvdimm_name(nvdimm));
return -ENOMEM;
}
mmio->size = nfit_mem->dcr->window_size;
mmio->base_offset = nfit_mem->memdev_dcr->region_offset;
mmio->idt = nfit_mem->idt_dcr;
mmio->spa = nfit_mem->spa_dcr;
rc = nfit_blk_init_interleave(mmio, nfit_mem->idt_dcr,
nfit_mem->memdev_dcr->interleave_ways);
if (rc) {
dev_dbg(dev, "%s failed to init dcr interleave\n",
nvdimm_name(nvdimm));
return rc;
}
rc = acpi_nfit_blk_get_flags(nd_desc, nvdimm, nfit_blk);
if (rc < 0) {
dev_dbg(dev, "%s failed get DIMM flags\n",
nvdimm_name(nvdimm));
return rc;
}
if (nvdimm_has_flush(nfit_blk->nd_region) < 0)
dev_warn(dev, "unable to guarantee persistence of writes\n");
if (mmio->line_size == 0)
return 0;
if ((u32) nfit_blk->cmd_offset % mmio->line_size
+ 8 > mmio->line_size) {
dev_dbg(dev, "cmd_offset crosses interleave boundary\n");
return -ENXIO;
} else if ((u32) nfit_blk->stat_offset % mmio->line_size
+ 8 > mmio->line_size) {
dev_dbg(dev, "stat_offset crosses interleave boundary\n");
return -ENXIO;
}
return 0;
}
static int ars_get_cap(struct acpi_nfit_desc *acpi_desc, static int ars_get_cap(struct acpi_nfit_desc *acpi_desc,
struct nd_cmd_ars_cap *cmd, struct nfit_spa *nfit_spa) struct nd_cmd_ars_cap *cmd, struct nfit_spa *nfit_spa)
{ {
@ -2911,9 +2563,6 @@ static int acpi_nfit_init_mapping(struct acpi_nfit_desc *acpi_desc,
struct nvdimm *nvdimm = acpi_nfit_dimm_by_handle(acpi_desc, struct nvdimm *nvdimm = acpi_nfit_dimm_by_handle(acpi_desc,
memdev->device_handle); memdev->device_handle);
struct acpi_nfit_system_address *spa = nfit_spa->spa; struct acpi_nfit_system_address *spa = nfit_spa->spa;
struct nd_blk_region_desc *ndbr_desc;
struct nfit_mem *nfit_mem;
int rc;
if (!nvdimm) { if (!nvdimm) {
dev_err(acpi_desc->dev, "spa%d dimm: %#x not found\n", dev_err(acpi_desc->dev, "spa%d dimm: %#x not found\n",
@ -2928,30 +2577,6 @@ static int acpi_nfit_init_mapping(struct acpi_nfit_desc *acpi_desc,
mapping->start = memdev->address; mapping->start = memdev->address;
mapping->size = memdev->region_size; mapping->size = memdev->region_size;
break; break;
case NFIT_SPA_DCR:
nfit_mem = nvdimm_provider_data(nvdimm);
if (!nfit_mem || !nfit_mem->bdw) {
dev_dbg(acpi_desc->dev, "spa%d %s missing bdw\n",
spa->range_index, nvdimm_name(nvdimm));
break;
}
mapping->size = nfit_mem->bdw->capacity;
mapping->start = nfit_mem->bdw->start_address;
ndr_desc->num_lanes = nfit_mem->bdw->windows;
ndr_desc->mapping = mapping;
ndr_desc->num_mappings = 1;
ndbr_desc = to_blk_region_desc(ndr_desc);
ndbr_desc->enable = acpi_nfit_blk_region_enable;
ndbr_desc->do_io = acpi_desc->blk_do_io;
rc = acpi_nfit_init_interleave_set(acpi_desc, ndr_desc, spa);
if (rc)
return rc;
nfit_spa->nd_region = nvdimm_blk_region_create(acpi_desc->nvdimm_bus,
ndr_desc);
if (!nfit_spa->nd_region)
return -ENOMEM;
break;
} }
return 0; return 0;
@ -3635,7 +3260,6 @@ void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev)
dev_set_drvdata(dev, acpi_desc); dev_set_drvdata(dev, acpi_desc);
acpi_desc->dev = dev; acpi_desc->dev = dev;
acpi_desc->blk_do_io = acpi_nfit_blk_region_do_io;
nd_desc = &acpi_desc->nd_desc; nd_desc = &acpi_desc->nd_desc;
nd_desc->provider_name = "ACPI.NFIT"; nd_desc->provider_name = "ACPI.NFIT";
nd_desc->module = THIS_MODULE; nd_desc->module = THIS_MODULE;

6
drivers/acpi/nfit/nfit.h
View File

@ -208,13 +208,9 @@ struct nfit_mem {
struct nvdimm *nvdimm; struct nvdimm *nvdimm;
struct acpi_nfit_memory_map *memdev_dcr; struct acpi_nfit_memory_map *memdev_dcr;
struct acpi_nfit_memory_map *memdev_pmem; struct acpi_nfit_memory_map *memdev_pmem;
struct acpi_nfit_memory_map *memdev_bdw;
struct acpi_nfit_control_region *dcr; struct acpi_nfit_control_region *dcr;
struct acpi_nfit_data_region *bdw;
struct acpi_nfit_system_address *spa_dcr; struct acpi_nfit_system_address *spa_dcr;
struct acpi_nfit_system_address *spa_bdw;
struct acpi_nfit_interleave *idt_dcr; struct acpi_nfit_interleave *idt_dcr;
struct acpi_nfit_interleave *idt_bdw;
struct kernfs_node *flags_attr; struct kernfs_node *flags_attr;
struct nfit_flush *nfit_flush; struct nfit_flush *nfit_flush;
struct list_head list; struct list_head list;
@ -266,8 +262,6 @@ struct acpi_nfit_desc {
unsigned long family_dsm_mask[NVDIMM_BUS_FAMILY_MAX + 1]; unsigned long family_dsm_mask[NVDIMM_BUS_FAMILY_MAX + 1];
unsigned int platform_cap; unsigned int platform_cap;
unsigned int scrub_tmo; unsigned int scrub_tmo;
int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
void *iobuf, u64 len, int rw);
enum nvdimm_fwa_state fwa_state; enum nvdimm_fwa_state fwa_state;
enum nvdimm_fwa_capability fwa_cap; enum nvdimm_fwa_capability fwa_cap;
int fwa_count; int fwa_count;

23
tools/testing/nvdimm/test/nfit.c
View File

@ -2842,28 +2842,6 @@ static void nfit_test1_setup(struct nfit_test *t)
set_bit(ND_CMD_SET_CONFIG_DATA, &acpi_desc->dimm_cmd_force_en); set_bit(ND_CMD_SET_CONFIG_DATA, &acpi_desc->dimm_cmd_force_en);
} }
static int nfit_test_blk_do_io(struct nd_blk_region *ndbr, resource_size_t dpa,
void *iobuf, u64 len, int rw)
{
struct nfit_blk *nfit_blk = ndbr->blk_provider_data;
struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW];
struct nd_region *nd_region = &ndbr->nd_region;
unsigned int lane;
lane = nd_region_acquire_lane(nd_region);
if (rw)
memcpy(mmio->addr.base + dpa, iobuf, len);
else {
memcpy(iobuf, mmio->addr.base + dpa, len);
/* give us some some coverage of the arch_invalidate_pmem() API */
arch_invalidate_pmem(mmio->addr.base + dpa, len);
}
nd_region_release_lane(nd_region, lane);
return 0;
}
static unsigned long nfit_ctl_handle; static unsigned long nfit_ctl_handle;
union acpi_object *result; union acpi_object *result;
@ -3219,7 +3197,6 @@ static int nfit_test_probe(struct platform_device *pdev)
nfit_test->setup(nfit_test); nfit_test->setup(nfit_test);
acpi_desc = &nfit_test->acpi_desc; acpi_desc = &nfit_test->acpi_desc;
acpi_nfit_desc_init(acpi_desc, &pdev->dev); acpi_nfit_desc_init(acpi_desc, &pdev->dev);
acpi_desc->blk_do_io = nfit_test_blk_do_io;
nd_desc = &acpi_desc->nd_desc; nd_desc = &acpi_desc->nd_desc;
nd_desc->provider_name = NULL; nd_desc->provider_name = NULL;
nd_desc->module = THIS_MODULE; nd_desc->module = THIS_MODULE;