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path: root/drivers/nvdimm/bus.c
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Diffstat (limited to 'drivers/nvdimm/bus.c')
-rw-r--r--drivers/nvdimm/bus.c122
1 files changed, 111 insertions, 11 deletions
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index 351bac8f6503..e9361bffe5ee 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -27,6 +27,7 @@
#include <linux/nd.h>
#include "nd-core.h"
#include "nd.h"
+#include "pfn.h"
int nvdimm_major;
static int nvdimm_bus_major;
@@ -171,6 +172,57 @@ void nvdimm_region_notify(struct nd_region *nd_region, enum nvdimm_event event)
}
EXPORT_SYMBOL_GPL(nvdimm_region_notify);
+struct clear_badblocks_context {
+ resource_size_t phys, cleared;
+};
+
+static int nvdimm_clear_badblocks_region(struct device *dev, void *data)
+{
+ struct clear_badblocks_context *ctx = data;
+ struct nd_region *nd_region;
+ resource_size_t ndr_end;
+ sector_t sector;
+
+ /* make sure device is a region */
+ if (!is_nd_pmem(dev))
+ return 0;
+
+ nd_region = to_nd_region(dev);
+ ndr_end = nd_region->ndr_start + nd_region->ndr_size - 1;
+
+ /* make sure we are in the region */
+ if (ctx->phys < nd_region->ndr_start
+ || (ctx->phys + ctx->cleared) > ndr_end)
+ return 0;
+
+ sector = (ctx->phys - nd_region->ndr_start) / 512;
+ badblocks_clear(&nd_region->bb, sector, ctx->cleared / 512);
+
+ return 0;
+}
+
+static void nvdimm_clear_badblocks_regions(struct nvdimm_bus *nvdimm_bus,
+ phys_addr_t phys, u64 cleared)
+{
+ struct clear_badblocks_context ctx = {
+ .phys = phys,
+ .cleared = cleared,
+ };
+
+ device_for_each_child(&nvdimm_bus->dev, &ctx,
+ nvdimm_clear_badblocks_region);
+}
+
+static void nvdimm_account_cleared_poison(struct nvdimm_bus *nvdimm_bus,
+ phys_addr_t phys, u64 cleared)
+{
+ if (cleared > 0)
+ nvdimm_forget_poison(nvdimm_bus, phys, cleared);
+
+ if (cleared > 0 && cleared / 512)
+ nvdimm_clear_badblocks_regions(nvdimm_bus, phys, cleared);
+}
+
long nvdimm_clear_poison(struct device *dev, phys_addr_t phys,
unsigned int len)
{
@@ -218,7 +270,8 @@ long nvdimm_clear_poison(struct device *dev, phys_addr_t phys,
if (cmd_rc < 0)
return cmd_rc;
- nvdimm_clear_from_poison_list(nvdimm_bus, phys, len);
+ nvdimm_account_cleared_poison(nvdimm_bus, phys, clear_err.cleared);
+
return clear_err.cleared;
}
EXPORT_SYMBOL_GPL(nvdimm_clear_poison);
@@ -286,6 +339,7 @@ struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
init_waitqueue_head(&nvdimm_bus->probe_wait);
nvdimm_bus->id = ida_simple_get(&nd_ida, 0, 0, GFP_KERNEL);
mutex_init(&nvdimm_bus->reconfig_mutex);
+ spin_lock_init(&nvdimm_bus->poison_lock);
if (nvdimm_bus->id < 0) {
kfree(nvdimm_bus);
return NULL;
@@ -354,9 +408,9 @@ static int nd_bus_remove(struct device *dev)
nd_synchronize();
device_for_each_child(&nvdimm_bus->dev, NULL, child_unregister);
- nvdimm_bus_lock(&nvdimm_bus->dev);
+ spin_lock(&nvdimm_bus->poison_lock);
free_poison_list(&nvdimm_bus->poison_list);
- nvdimm_bus_unlock(&nvdimm_bus->dev);
+ spin_unlock(&nvdimm_bus->poison_lock);
nvdimm_bus_destroy_ndctl(nvdimm_bus);
@@ -769,16 +823,55 @@ void wait_nvdimm_bus_probe_idle(struct device *dev)
} while (true);
}
-static int pmem_active(struct device *dev, void *data)
+static int nd_pmem_forget_poison_check(struct device *dev, void *data)
{
- if (is_nd_pmem(dev) && dev->driver)
+ struct nd_cmd_clear_error *clear_err =
+ (struct nd_cmd_clear_error *)data;
+ struct nd_btt *nd_btt = is_nd_btt(dev) ? to_nd_btt(dev) : NULL;
+ struct nd_pfn *nd_pfn = is_nd_pfn(dev) ? to_nd_pfn(dev) : NULL;
+ struct nd_dax *nd_dax = is_nd_dax(dev) ? to_nd_dax(dev) : NULL;
+ struct nd_namespace_common *ndns = NULL;
+ struct nd_namespace_io *nsio;
+ resource_size_t offset = 0, end_trunc = 0, start, end, pstart, pend;
+
+ if (nd_dax || !dev->driver)
+ return 0;
+
+ start = clear_err->address;
+ end = clear_err->address + clear_err->cleared - 1;
+
+ if (nd_btt || nd_pfn || nd_dax) {
+ if (nd_btt)
+ ndns = nd_btt->ndns;
+ else if (nd_pfn)
+ ndns = nd_pfn->ndns;
+ else if (nd_dax)
+ ndns = nd_dax->nd_pfn.ndns;
+
+ if (!ndns)
+ return 0;
+ } else
+ ndns = to_ndns(dev);
+
+ nsio = to_nd_namespace_io(&ndns->dev);
+ pstart = nsio->res.start + offset;
+ pend = nsio->res.end - end_trunc;
+
+ if ((pstart >= start) && (pend <= end))
return -EBUSY;
+
return 0;
+
+}
+
+static int nd_ns_forget_poison_check(struct device *dev, void *data)
+{
+ return device_for_each_child(dev, data, nd_pmem_forget_poison_check);
}
/* set_config requires an idle interleave set */
static int nd_cmd_clear_to_send(struct nvdimm_bus *nvdimm_bus,
- struct nvdimm *nvdimm, unsigned int cmd)
+ struct nvdimm *nvdimm, unsigned int cmd, void *data)
{
struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
@@ -792,8 +885,8 @@ static int nd_cmd_clear_to_send(struct nvdimm_bus *nvdimm_bus,
/* require clear error to go through the pmem driver */
if (!nvdimm && cmd == ND_CMD_CLEAR_ERROR)
- return device_for_each_child(&nvdimm_bus->dev, NULL,
- pmem_active);
+ return device_for_each_child(&nvdimm_bus->dev, data,
+ nd_ns_forget_poison_check);
if (!nvdimm || cmd != ND_CMD_SET_CONFIG_DATA)
return 0;
@@ -820,7 +913,7 @@ static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm,
const char *cmd_name, *dimm_name;
unsigned long cmd_mask;
void *buf;
- int rc, i;
+ int rc, i, cmd_rc;
if (nvdimm) {
desc = nd_cmd_dimm_desc(cmd);
@@ -927,13 +1020,20 @@ static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm,
}
nvdimm_bus_lock(&nvdimm_bus->dev);
- rc = nd_cmd_clear_to_send(nvdimm_bus, nvdimm, cmd);
+ rc = nd_cmd_clear_to_send(nvdimm_bus, nvdimm, cmd, buf);
if (rc)
goto out_unlock;
- rc = nd_desc->ndctl(nd_desc, nvdimm, cmd, buf, buf_len, NULL);
+ rc = nd_desc->ndctl(nd_desc, nvdimm, cmd, buf, buf_len, &cmd_rc);
if (rc < 0)
goto out_unlock;
+
+ if (!nvdimm && cmd == ND_CMD_CLEAR_ERROR && cmd_rc >= 0) {
+ struct nd_cmd_clear_error *clear_err = buf;
+
+ nvdimm_account_cleared_poison(nvdimm_bus, clear_err->address,
+ clear_err->cleared);
+ }
nvdimm_bus_unlock(&nvdimm_bus->dev);
if (copy_to_user(p, buf, buf_len))