Commit b16bdc6d authored by Artur Paszkiewicz's avatar Artur Paszkiewicz Committed by Tomasz Zawadzki
Browse files

FTL: Add L2P API and flat L2P implementation 



Signed-off-by: default avatarKozlowski Mateusz <mateusz.kozlowski@intel.com>
Signed-off-by: default avatarArtur Paszkiewicz <artur.paszkiewicz@intel.com>
Change-Id: Ifadc8c6986164584235ee6a67799025fa7703b5d
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/13315


Tested-by: default avatarSPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Reviewed-by: default avatarJim Harris <james.r.harris@intel.com>
Reviewed-by: default avatarBen Walker <benjamin.walker@intel.com>
parent b6eecb21

lib/ftl/Makefile

+2 −2
Original line number Diff line number Diff line
@@ -21,9 +21,9 @@ CFLAGS += -I. 


FTL_SUBDIRS := mngt utils



C_SRCS = ftl_core.c ftl_init.c ftl_layout.c ftl_debug.c ftl_io.c ftl_sb.c

C_SRCS = ftl_core.c ftl_init.c ftl_layout.c ftl_debug.c ftl_io.c ftl_sb.c ftl_l2p.c ftl_l2p_flat.c

C_SRCS += mngt/ftl_mngt.c mngt/ftl_mngt_bdev.c mngt/ftl_mngt_shutdown.c mngt/ftl_mngt_startup.c

C_SRCS += mngt/ftl_mngt_md.c mngt/ftl_mngt_misc.c mngt/ftl_mngt_ioch.c

C_SRCS += mngt/ftl_mngt_md.c mngt/ftl_mngt_misc.c mngt/ftl_mngt_ioch.c mngt/ftl_mngt_l2p.c

C_SRCS += utils/ftl_conf.c utils/ftl_md.c utils/ftl_mempool.c



SPDK_MAP_FILE = $(abspath $(CURDIR)/spdk_ftl.map)

lib/ftl/ftl_core.c

+17 −3
Original line number Diff line number Diff line
@@ -26,14 +26,27 @@ spdk_ftl_io_size(void) 
	return sizeof(struct ftl_io);

}



static int

static bool

ftl_shutdown_complete(struct spdk_ftl_dev *dev)

{

	if (dev->num_inflight) {

		return 0;

		return false;

	}



	if (!ftl_l2p_is_halted(dev)) {

		ftl_l2p_halt(dev);

		return false;

	}



	return true;

}



	return 1;

void

ftl_invalidate_addr(struct spdk_ftl_dev *dev, ftl_addr addr)

{

	if (ftl_addr_in_nvc(dev, addr)) {

		return;

	}

}



void
@@ -128,6 +141,7 @@ ftl_core_poller(void *ctx) 
	}



	ftl_process_io_queue(dev);

	ftl_l2p_process(dev);



	if (io_activity_total_old != dev->io_activity_total) {

		return SPDK_POLLER_BUSY;

lib/ftl/ftl_core.h

+9 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ 
#include "ftl_io.h"

#include "ftl_layout.h"

#include "ftl_sb.h"

#include "ftl_l2p.h"

#include "utils/ftl_log.h"



/* When using VSS on nvcache, FTL sometimes doesn't require the contents of metadata.
@@ -81,6 +82,12 @@ struct spdk_ftl_dev { 
	/* Number of free bands */

	uint64_t			num_free;



	/* Logical -> physical table */

	void				*l2p;



	/* l2p deferred pins list */

	TAILQ_HEAD(, ftl_l2p_pin_ctx) l2p_deferred_pins;



	/* Size of the l2p table */

	uint64_t			num_lbas;
@@ -117,6 +124,8 @@ struct spdk_ftl_dev { 
	TAILQ_HEAD(, ftl_io)		wr_sq;

};



void ftl_invalidate_addr(struct spdk_ftl_dev *dev, ftl_addr addr);



int ftl_core_poller(void *ctx);



int ftl_io_channel_poll(void *arg);

lib/ftl/ftl_io.c

+35 −0
Original line number Diff line number Diff line
@@ -181,12 +181,47 @@ ftl_io_init(struct spdk_io_channel *_ioch, struct ftl_io *io, uint64_t lba, size 
	return 0;

}



static void

ftl_io_complete_verify(struct ftl_io *io)

{

	struct spdk_ftl_dev *dev = io->dev;

	uint64_t i;

	uint64_t lba = io->lba;



	assert(io->num_blocks <= dev->xfer_size);



	if (FTL_IO_WRITE == io->type) {

		return;

	}



	if (spdk_unlikely(io->status)) {

		return;

	}



	for (i = 0; i < io->num_blocks; i++, lba++) {

		ftl_addr current_addr = ftl_l2p_get(dev, lba);



		/* If user read request gets stuck for whatever reason, then it's possible the LBA

		 * has been relocated by GC or compaction and it may no longer be safe to return data

		 * from that address */

		if (spdk_unlikely(current_addr != io->map[i])) {

			io->status = -EAGAIN;

			break;

		}

	}

}



void

ftl_io_complete(struct ftl_io *io)

{

	io->flags &= ~FTL_IO_INITIALIZED;

	io->done = true;



	if (io->flags & FTL_IO_PINNED) {

		ftl_io_complete_verify(io);

		ftl_l2p_unpin(io->dev, io->lba, io->num_blocks);

	}



	ftl_io_cb(io, io->cb_ctx, io->status);

}

lib/ftl/ftl_io.h

+9 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
#include "spdk/util.h"



#include "ftl_internal.h"

#include "ftl_l2p.h"

#include "utils/ftl_md.h"



struct spdk_ftl_dev;
@@ -24,6 +25,8 @@ typedef void (*ftl_io_fn)(struct ftl_io *, void *, int); 
enum ftl_io_flags {

	/* Indicates whether IO is already initialized */

	FTL_IO_INITIALIZED	= (1 << 0),

	/* Indicated whether the user IO pinned the L2P pages containing LBAs */

	FTL_IO_PINNED		= (1 << 1),

};



enum ftl_io_type {
@@ -111,6 +114,9 @@ struct ftl_io { 
	/* Reference to the chunk within NV cache */

	struct ftl_nv_cache_chunk	*nv_cache_chunk;



	/* For l2p pinning */

	struct ftl_l2p_pin_ctx		l2p_pin_ctx;



	/* Logical to physical mapping for this IO, number of entries equals to

	 * number of transfer blocks */

	ftl_addr			*map;
@@ -141,6 +147,9 @@ struct ftl_rq_entry { 
		void *priv;

	} owner;



	/* For l2p pinning */

	struct ftl_l2p_pin_ctx l2p_pin_ctx;



	struct {

		uint64_t offset_blocks;

		uint64_t num_blocks;