Internal logic for both core and media managers, does not have a
backing bio for issuing I/Os. Introduce nvm_submit_ppa to allow raw
I/Os to be submitted to the underlying device driver.
The function request the device, ppa, data buffer and its length and
will submit the I/O synchronously to the device. The return value may
therefore be used to detect any errors regarding the issued I/O.
Signed-off-by: Matias Bjørling <m@xxxxxxxxxxx>
---
drivers/lightnvm/core.c | 31 +++++++++++++++++++++++++++++++
include/linux/lightnvm.h | 1 +
2 files changed, 32 insertions(+)
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 081b0f5..77a9907 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -288,6 +288,37 @@ int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr ppa)
}
EXPORT_SYMBOL(nvm_erase_ppa);
+int nvm_submit_ppa(struct nvm_dev *dev, struct ppa_addr ppa, int opcode,
+ void *buf, int len)
+{
+ struct nvm_rq rqd;
+ struct bio *bio;
+ int ret;
+
+ bio = bio_map_kern(dev->q, buf, len, GFP_KERNEL);
+ if (IS_ERR_OR_NULL(bio))
+ return -ENOMEM;
+
+ memset(&rqd, 0, sizeof(struct nvm_rq));
+ ret = nvm_set_rqd_ppalist(dev, &rqd, &ppa, 1);
+ if (ret) {
+ bio_put(bio);
+ return ret;
+ }
+
+ rqd.opcode = opcode;
+ rqd.flags = NVM_IO_F_SYNC;
+ rqd.bio = bio;
+ nvm_generic_to_addr_mode(dev, &rqd);
+
+ ret = dev->ops->submit_io(dev, &rqd);
+
+ nvm_free_rqd_ppalist(dev, &rqd);
+
+ return ret;
+}
+EXPORT_SYMBOL(nvm_submit_ppa);
+
static int nvm_core_init(struct nvm_dev *dev)
{
struct nvm_id *id = &dev->identity;
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 770278a..0017d55 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -437,6 +437,7 @@ extern int nvm_set_rqd_ppalist(struct nvm_dev *, struct nvm_rq *,
extern void nvm_free_rqd_ppalist(struct nvm_dev *, struct nvm_rq *);
extern int nvm_erase_ppa(struct nvm_dev *, struct ppa_addr);
extern int nvm_erase_blk(struct nvm_dev *, struct nvm_block *);
+extern int nvm_submit_ppa(struct nvm_dev *, struct ppa_addr, int, void *, int);
#else /* CONFIG_NVM */
struct nvm_dev_ops;
--
2.1.4
--
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