![Matias Bjørling](/assets/img/avatar_default.png)
When the lightnvm core had the "gennvm" layer between the device and the target, there was a need for the core to be able to figure out which target it should send an end_io callback to. Leading to a "double" end_io, first for the media manager instance, and then for the target instance. Now that core and gennvm is merged, there is no longer a need for this, and a single end_io callback will do. Signed-off-by: Matias Bjørling <matias@cnexlabs.com> Signed-off-by: Jens Axboe <axboe@fb.com>
1015 lines
26 KiB
C
1015 lines
26 KiB
C
/*
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* nvme-lightnvm.c - LightNVM NVMe device
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*
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* Copyright (C) 2014-2015 IT University of Copenhagen
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* Initial release: Matias Bjorling <mb@lightnvm.io>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
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* USA.
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*
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*/
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#include "nvme.h"
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#include <linux/nvme.h>
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#include <linux/bitops.h>
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#include <linux/lightnvm.h>
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#include <linux/vmalloc.h>
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#include <linux/sched/sysctl.h>
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#include <uapi/linux/lightnvm.h>
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enum nvme_nvm_admin_opcode {
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nvme_nvm_admin_identity = 0xe2,
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nvme_nvm_admin_get_l2p_tbl = 0xea,
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nvme_nvm_admin_get_bb_tbl = 0xf2,
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nvme_nvm_admin_set_bb_tbl = 0xf1,
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};
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struct nvme_nvm_hb_rw {
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__u8 opcode;
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__u8 flags;
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__u16 command_id;
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__le32 nsid;
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__u64 rsvd2;
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__le64 metadata;
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__le64 prp1;
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__le64 prp2;
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__le64 spba;
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__le16 length;
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__le16 control;
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__le32 dsmgmt;
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__le64 slba;
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};
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struct nvme_nvm_ph_rw {
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__u8 opcode;
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__u8 flags;
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__u16 command_id;
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__le32 nsid;
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__u64 rsvd2;
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__le64 metadata;
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__le64 prp1;
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__le64 prp2;
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__le64 spba;
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__le16 length;
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__le16 control;
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__le32 dsmgmt;
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__le64 resv;
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};
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struct nvme_nvm_identity {
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__u8 opcode;
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__u8 flags;
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__u16 command_id;
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__le32 nsid;
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__u64 rsvd[2];
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__le64 prp1;
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__le64 prp2;
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__le32 chnl_off;
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__u32 rsvd11[5];
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};
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struct nvme_nvm_l2ptbl {
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__u8 opcode;
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__u8 flags;
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__u16 command_id;
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__le32 nsid;
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__le32 cdw2[4];
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__le64 prp1;
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__le64 prp2;
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__le64 slba;
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__le32 nlb;
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__le16 cdw14[6];
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};
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struct nvme_nvm_getbbtbl {
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__u8 opcode;
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__u8 flags;
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__u16 command_id;
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__le32 nsid;
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__u64 rsvd[2];
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__le64 prp1;
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__le64 prp2;
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__le64 spba;
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__u32 rsvd4[4];
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};
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struct nvme_nvm_setbbtbl {
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__u8 opcode;
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__u8 flags;
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__u16 command_id;
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__le32 nsid;
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__le64 rsvd[2];
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__le64 prp1;
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__le64 prp2;
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__le64 spba;
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__le16 nlb;
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__u8 value;
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__u8 rsvd3;
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__u32 rsvd4[3];
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};
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struct nvme_nvm_erase_blk {
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__u8 opcode;
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__u8 flags;
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__u16 command_id;
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__le32 nsid;
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__u64 rsvd[2];
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__le64 prp1;
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__le64 prp2;
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__le64 spba;
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__le16 length;
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__le16 control;
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__le32 dsmgmt;
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__le64 resv;
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};
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struct nvme_nvm_command {
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union {
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struct nvme_common_command common;
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struct nvme_nvm_identity identity;
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struct nvme_nvm_hb_rw hb_rw;
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struct nvme_nvm_ph_rw ph_rw;
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struct nvme_nvm_l2ptbl l2p;
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struct nvme_nvm_getbbtbl get_bb;
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struct nvme_nvm_setbbtbl set_bb;
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struct nvme_nvm_erase_blk erase;
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};
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};
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#define NVME_NVM_LP_MLC_PAIRS 886
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struct nvme_nvm_lp_mlc {
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__le16 num_pairs;
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__u8 pairs[NVME_NVM_LP_MLC_PAIRS];
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};
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struct nvme_nvm_lp_tbl {
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__u8 id[8];
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struct nvme_nvm_lp_mlc mlc;
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};
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struct nvme_nvm_id_group {
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__u8 mtype;
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__u8 fmtype;
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__le16 res16;
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__u8 num_ch;
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__u8 num_lun;
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__u8 num_pln;
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__u8 rsvd1;
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__le16 num_blk;
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__le16 num_pg;
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__le16 fpg_sz;
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__le16 csecs;
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__le16 sos;
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__le16 rsvd2;
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__le32 trdt;
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__le32 trdm;
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__le32 tprt;
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__le32 tprm;
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__le32 tbet;
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__le32 tbem;
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__le32 mpos;
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__le32 mccap;
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__le16 cpar;
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__u8 reserved[10];
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struct nvme_nvm_lp_tbl lptbl;
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} __packed;
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struct nvme_nvm_addr_format {
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__u8 ch_offset;
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__u8 ch_len;
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__u8 lun_offset;
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__u8 lun_len;
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__u8 pln_offset;
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__u8 pln_len;
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__u8 blk_offset;
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__u8 blk_len;
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__u8 pg_offset;
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__u8 pg_len;
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__u8 sect_offset;
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__u8 sect_len;
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__u8 res[4];
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} __packed;
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struct nvme_nvm_id {
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__u8 ver_id;
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__u8 vmnt;
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__u8 cgrps;
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__u8 res;
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__le32 cap;
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__le32 dom;
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struct nvme_nvm_addr_format ppaf;
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__u8 resv[228];
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struct nvme_nvm_id_group groups[4];
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} __packed;
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struct nvme_nvm_bb_tbl {
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__u8 tblid[4];
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__le16 verid;
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__le16 revid;
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__le32 rvsd1;
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__le32 tblks;
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__le32 tfact;
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__le32 tgrown;
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__le32 tdresv;
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__le32 thresv;
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__le32 rsvd2[8];
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__u8 blk[0];
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};
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/*
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* Check we didn't inadvertently grow the command struct
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*/
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static inline void _nvme_nvm_check_size(void)
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{
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BUILD_BUG_ON(sizeof(struct nvme_nvm_identity) != 64);
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BUILD_BUG_ON(sizeof(struct nvme_nvm_hb_rw) != 64);
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BUILD_BUG_ON(sizeof(struct nvme_nvm_ph_rw) != 64);
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BUILD_BUG_ON(sizeof(struct nvme_nvm_getbbtbl) != 64);
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BUILD_BUG_ON(sizeof(struct nvme_nvm_setbbtbl) != 64);
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BUILD_BUG_ON(sizeof(struct nvme_nvm_l2ptbl) != 64);
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BUILD_BUG_ON(sizeof(struct nvme_nvm_erase_blk) != 64);
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BUILD_BUG_ON(sizeof(struct nvme_nvm_id_group) != 960);
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BUILD_BUG_ON(sizeof(struct nvme_nvm_addr_format) != 128);
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BUILD_BUG_ON(sizeof(struct nvme_nvm_id) != 4096);
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BUILD_BUG_ON(sizeof(struct nvme_nvm_bb_tbl) != 512);
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}
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static int init_grps(struct nvm_id *nvm_id, struct nvme_nvm_id *nvme_nvm_id)
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{
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struct nvme_nvm_id_group *src;
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struct nvm_id_group *dst;
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if (nvme_nvm_id->cgrps != 1)
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return -EINVAL;
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src = &nvme_nvm_id->groups[0];
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dst = &nvm_id->grp;
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dst->mtype = src->mtype;
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dst->fmtype = src->fmtype;
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dst->num_ch = src->num_ch;
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dst->num_lun = src->num_lun;
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dst->num_pln = src->num_pln;
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dst->num_pg = le16_to_cpu(src->num_pg);
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dst->num_blk = le16_to_cpu(src->num_blk);
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dst->fpg_sz = le16_to_cpu(src->fpg_sz);
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dst->csecs = le16_to_cpu(src->csecs);
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dst->sos = le16_to_cpu(src->sos);
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dst->trdt = le32_to_cpu(src->trdt);
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dst->trdm = le32_to_cpu(src->trdm);
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dst->tprt = le32_to_cpu(src->tprt);
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dst->tprm = le32_to_cpu(src->tprm);
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dst->tbet = le32_to_cpu(src->tbet);
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dst->tbem = le32_to_cpu(src->tbem);
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dst->mpos = le32_to_cpu(src->mpos);
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dst->mccap = le32_to_cpu(src->mccap);
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dst->cpar = le16_to_cpu(src->cpar);
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if (dst->fmtype == NVM_ID_FMTYPE_MLC) {
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memcpy(dst->lptbl.id, src->lptbl.id, 8);
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dst->lptbl.mlc.num_pairs =
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le16_to_cpu(src->lptbl.mlc.num_pairs);
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if (dst->lptbl.mlc.num_pairs > NVME_NVM_LP_MLC_PAIRS) {
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pr_err("nvm: number of MLC pairs not supported\n");
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return -EINVAL;
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}
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memcpy(dst->lptbl.mlc.pairs, src->lptbl.mlc.pairs,
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dst->lptbl.mlc.num_pairs);
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}
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return 0;
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}
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static int nvme_nvm_identity(struct nvm_dev *nvmdev, struct nvm_id *nvm_id)
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{
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struct nvme_ns *ns = nvmdev->q->queuedata;
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struct nvme_nvm_id *nvme_nvm_id;
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struct nvme_nvm_command c = {};
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int ret;
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c.identity.opcode = nvme_nvm_admin_identity;
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c.identity.nsid = cpu_to_le32(ns->ns_id);
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c.identity.chnl_off = 0;
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nvme_nvm_id = kmalloc(sizeof(struct nvme_nvm_id), GFP_KERNEL);
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if (!nvme_nvm_id)
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return -ENOMEM;
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ret = nvme_submit_sync_cmd(ns->ctrl->admin_q, (struct nvme_command *)&c,
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nvme_nvm_id, sizeof(struct nvme_nvm_id));
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if (ret) {
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ret = -EIO;
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goto out;
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}
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nvm_id->ver_id = nvme_nvm_id->ver_id;
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nvm_id->vmnt = nvme_nvm_id->vmnt;
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nvm_id->cap = le32_to_cpu(nvme_nvm_id->cap);
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nvm_id->dom = le32_to_cpu(nvme_nvm_id->dom);
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memcpy(&nvm_id->ppaf, &nvme_nvm_id->ppaf,
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sizeof(struct nvme_nvm_addr_format));
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ret = init_grps(nvm_id, nvme_nvm_id);
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out:
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kfree(nvme_nvm_id);
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return ret;
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}
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static int nvme_nvm_get_l2p_tbl(struct nvm_dev *nvmdev, u64 slba, u32 nlb,
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nvm_l2p_update_fn *update_l2p, void *priv)
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{
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struct nvme_ns *ns = nvmdev->q->queuedata;
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struct nvme_nvm_command c = {};
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u32 len = queue_max_hw_sectors(ns->ctrl->admin_q) << 9;
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u32 nlb_pr_rq = len / sizeof(u64);
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u64 cmd_slba = slba;
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void *entries;
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int ret = 0;
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c.l2p.opcode = nvme_nvm_admin_get_l2p_tbl;
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c.l2p.nsid = cpu_to_le32(ns->ns_id);
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entries = kmalloc(len, GFP_KERNEL);
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if (!entries)
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return -ENOMEM;
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while (nlb) {
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u32 cmd_nlb = min(nlb_pr_rq, nlb);
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u64 elba = slba + cmd_nlb;
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c.l2p.slba = cpu_to_le64(cmd_slba);
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c.l2p.nlb = cpu_to_le32(cmd_nlb);
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ret = nvme_submit_sync_cmd(ns->ctrl->admin_q,
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(struct nvme_command *)&c, entries, len);
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if (ret) {
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dev_err(ns->ctrl->device,
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"L2P table transfer failed (%d)\n", ret);
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ret = -EIO;
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goto out;
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}
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if (unlikely(elba > nvmdev->total_secs)) {
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pr_err("nvm: L2P data from device is out of bounds!\n");
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return -EINVAL;
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}
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/* Transform physical address to target address space */
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nvm_part_to_tgt(nvmdev, entries, cmd_nlb);
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if (update_l2p(cmd_slba, cmd_nlb, entries, priv)) {
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ret = -EINTR;
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goto out;
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}
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cmd_slba += cmd_nlb;
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nlb -= cmd_nlb;
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}
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out:
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kfree(entries);
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return ret;
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}
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static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
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u8 *blks)
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{
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struct request_queue *q = nvmdev->q;
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struct nvm_geo *geo = &nvmdev->geo;
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struct nvme_ns *ns = q->queuedata;
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struct nvme_ctrl *ctrl = ns->ctrl;
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struct nvme_nvm_command c = {};
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struct nvme_nvm_bb_tbl *bb_tbl;
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int nr_blks = geo->blks_per_lun * geo->plane_mode;
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int tblsz = sizeof(struct nvme_nvm_bb_tbl) + nr_blks;
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int ret = 0;
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c.get_bb.opcode = nvme_nvm_admin_get_bb_tbl;
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c.get_bb.nsid = cpu_to_le32(ns->ns_id);
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c.get_bb.spba = cpu_to_le64(ppa.ppa);
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bb_tbl = kzalloc(tblsz, GFP_KERNEL);
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if (!bb_tbl)
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return -ENOMEM;
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ret = nvme_submit_sync_cmd(ctrl->admin_q, (struct nvme_command *)&c,
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bb_tbl, tblsz);
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if (ret) {
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dev_err(ctrl->device, "get bad block table failed (%d)\n", ret);
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ret = -EIO;
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goto out;
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}
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if (bb_tbl->tblid[0] != 'B' || bb_tbl->tblid[1] != 'B' ||
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bb_tbl->tblid[2] != 'L' || bb_tbl->tblid[3] != 'T') {
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dev_err(ctrl->device, "bbt format mismatch\n");
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ret = -EINVAL;
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goto out;
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}
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if (le16_to_cpu(bb_tbl->verid) != 1) {
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ret = -EINVAL;
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dev_err(ctrl->device, "bbt version not supported\n");
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goto out;
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}
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if (le32_to_cpu(bb_tbl->tblks) != nr_blks) {
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ret = -EINVAL;
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dev_err(ctrl->device,
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"bbt unsuspected blocks returned (%u!=%u)",
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le32_to_cpu(bb_tbl->tblks), nr_blks);
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goto out;
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}
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memcpy(blks, bb_tbl->blk, geo->blks_per_lun * geo->plane_mode);
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out:
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kfree(bb_tbl);
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return ret;
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}
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static int nvme_nvm_set_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr *ppas,
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int nr_ppas, int type)
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{
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struct nvme_ns *ns = nvmdev->q->queuedata;
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struct nvme_nvm_command c = {};
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int ret = 0;
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c.set_bb.opcode = nvme_nvm_admin_set_bb_tbl;
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c.set_bb.nsid = cpu_to_le32(ns->ns_id);
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c.set_bb.spba = cpu_to_le64(ppas->ppa);
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c.set_bb.nlb = cpu_to_le16(nr_ppas - 1);
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c.set_bb.value = type;
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ret = nvme_submit_sync_cmd(ns->ctrl->admin_q, (struct nvme_command *)&c,
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NULL, 0);
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if (ret)
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dev_err(ns->ctrl->device, "set bad block table failed (%d)\n",
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ret);
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return ret;
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}
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static inline void nvme_nvm_rqtocmd(struct request *rq, struct nvm_rq *rqd,
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struct nvme_ns *ns, struct nvme_nvm_command *c)
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{
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c->ph_rw.opcode = rqd->opcode;
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c->ph_rw.nsid = cpu_to_le32(ns->ns_id);
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c->ph_rw.spba = cpu_to_le64(rqd->ppa_addr.ppa);
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c->ph_rw.metadata = cpu_to_le64(rqd->dma_meta_list);
|
|
c->ph_rw.control = cpu_to_le16(rqd->flags);
|
|
c->ph_rw.length = cpu_to_le16(rqd->nr_ppas - 1);
|
|
|
|
if (rqd->opcode == NVM_OP_HBWRITE || rqd->opcode == NVM_OP_HBREAD)
|
|
c->hb_rw.slba = cpu_to_le64(nvme_block_nr(ns,
|
|
rqd->bio->bi_iter.bi_sector));
|
|
}
|
|
|
|
static void nvme_nvm_end_io(struct request *rq, int error)
|
|
{
|
|
struct nvm_rq *rqd = rq->end_io_data;
|
|
|
|
rqd->ppa_status = nvme_req(rq)->result.u64;
|
|
rqd->error = error;
|
|
nvm_end_io(rqd);
|
|
|
|
kfree(nvme_req(rq)->cmd);
|
|
blk_mq_free_request(rq);
|
|
}
|
|
|
|
static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
|
|
{
|
|
struct request_queue *q = dev->q;
|
|
struct nvme_ns *ns = q->queuedata;
|
|
struct request *rq;
|
|
struct bio *bio = rqd->bio;
|
|
struct nvme_nvm_command *cmd;
|
|
|
|
cmd = kzalloc(sizeof(struct nvme_nvm_command), GFP_KERNEL);
|
|
if (!cmd)
|
|
return -ENOMEM;
|
|
|
|
rq = nvme_alloc_request(q, (struct nvme_command *)cmd, 0, NVME_QID_ANY);
|
|
if (IS_ERR(rq)) {
|
|
kfree(cmd);
|
|
return -ENOMEM;
|
|
}
|
|
rq->cmd_flags &= ~REQ_FAILFAST_DRIVER;
|
|
|
|
rq->ioprio = bio_prio(bio);
|
|
if (bio_has_data(bio))
|
|
rq->nr_phys_segments = bio_phys_segments(q, bio);
|
|
|
|
rq->__data_len = bio->bi_iter.bi_size;
|
|
rq->bio = rq->biotail = bio;
|
|
|
|
nvme_nvm_rqtocmd(rq, rqd, ns, cmd);
|
|
|
|
rq->end_io_data = rqd;
|
|
|
|
blk_execute_rq_nowait(q, NULL, rq, 0, nvme_nvm_end_io);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nvme_nvm_erase_block(struct nvm_dev *dev, struct nvm_rq *rqd)
|
|
{
|
|
struct request_queue *q = dev->q;
|
|
struct nvme_ns *ns = q->queuedata;
|
|
struct nvme_nvm_command c = {};
|
|
|
|
c.erase.opcode = NVM_OP_ERASE;
|
|
c.erase.nsid = cpu_to_le32(ns->ns_id);
|
|
c.erase.spba = cpu_to_le64(rqd->ppa_addr.ppa);
|
|
c.erase.length = cpu_to_le16(rqd->nr_ppas - 1);
|
|
c.erase.control = cpu_to_le16(rqd->flags);
|
|
|
|
return nvme_submit_sync_cmd(q, (struct nvme_command *)&c, NULL, 0);
|
|
}
|
|
|
|
static void *nvme_nvm_create_dma_pool(struct nvm_dev *nvmdev, char *name)
|
|
{
|
|
struct nvme_ns *ns = nvmdev->q->queuedata;
|
|
|
|
return dma_pool_create(name, ns->ctrl->dev, PAGE_SIZE, PAGE_SIZE, 0);
|
|
}
|
|
|
|
static void nvme_nvm_destroy_dma_pool(void *pool)
|
|
{
|
|
struct dma_pool *dma_pool = pool;
|
|
|
|
dma_pool_destroy(dma_pool);
|
|
}
|
|
|
|
static void *nvme_nvm_dev_dma_alloc(struct nvm_dev *dev, void *pool,
|
|
gfp_t mem_flags, dma_addr_t *dma_handler)
|
|
{
|
|
return dma_pool_alloc(pool, mem_flags, dma_handler);
|
|
}
|
|
|
|
static void nvme_nvm_dev_dma_free(void *pool, void *addr,
|
|
dma_addr_t dma_handler)
|
|
{
|
|
dma_pool_free(pool, addr, dma_handler);
|
|
}
|
|
|
|
static struct nvm_dev_ops nvme_nvm_dev_ops = {
|
|
.identity = nvme_nvm_identity,
|
|
|
|
.get_l2p_tbl = nvme_nvm_get_l2p_tbl,
|
|
|
|
.get_bb_tbl = nvme_nvm_get_bb_tbl,
|
|
.set_bb_tbl = nvme_nvm_set_bb_tbl,
|
|
|
|
.submit_io = nvme_nvm_submit_io,
|
|
.erase_block = nvme_nvm_erase_block,
|
|
|
|
.create_dma_pool = nvme_nvm_create_dma_pool,
|
|
.destroy_dma_pool = nvme_nvm_destroy_dma_pool,
|
|
.dev_dma_alloc = nvme_nvm_dev_dma_alloc,
|
|
.dev_dma_free = nvme_nvm_dev_dma_free,
|
|
|
|
.max_phys_sect = 64,
|
|
};
|
|
|
|
static void nvme_nvm_end_user_vio(struct request *rq, int error)
|
|
{
|
|
struct completion *waiting = rq->end_io_data;
|
|
|
|
complete(waiting);
|
|
}
|
|
|
|
static int nvme_nvm_submit_user_cmd(struct request_queue *q,
|
|
struct nvme_ns *ns,
|
|
struct nvme_nvm_command *vcmd,
|
|
void __user *ubuf, unsigned int bufflen,
|
|
void __user *meta_buf, unsigned int meta_len,
|
|
void __user *ppa_buf, unsigned int ppa_len,
|
|
u32 *result, u64 *status, unsigned int timeout)
|
|
{
|
|
bool write = nvme_is_write((struct nvme_command *)vcmd);
|
|
struct nvm_dev *dev = ns->ndev;
|
|
struct gendisk *disk = ns->disk;
|
|
struct request *rq;
|
|
struct bio *bio = NULL;
|
|
__le64 *ppa_list = NULL;
|
|
dma_addr_t ppa_dma;
|
|
__le64 *metadata = NULL;
|
|
dma_addr_t metadata_dma;
|
|
DECLARE_COMPLETION_ONSTACK(wait);
|
|
int ret;
|
|
|
|
rq = nvme_alloc_request(q, (struct nvme_command *)vcmd, 0,
|
|
NVME_QID_ANY);
|
|
if (IS_ERR(rq)) {
|
|
ret = -ENOMEM;
|
|
goto err_cmd;
|
|
}
|
|
|
|
rq->timeout = timeout ? timeout : ADMIN_TIMEOUT;
|
|
|
|
rq->cmd_flags &= ~REQ_FAILFAST_DRIVER;
|
|
rq->end_io_data = &wait;
|
|
|
|
if (ppa_buf && ppa_len) {
|
|
ppa_list = dma_pool_alloc(dev->dma_pool, GFP_KERNEL, &ppa_dma);
|
|
if (!ppa_list) {
|
|
ret = -ENOMEM;
|
|
goto err_rq;
|
|
}
|
|
if (copy_from_user(ppa_list, (void __user *)ppa_buf,
|
|
sizeof(u64) * (ppa_len + 1))) {
|
|
ret = -EFAULT;
|
|
goto err_ppa;
|
|
}
|
|
vcmd->ph_rw.spba = cpu_to_le64(ppa_dma);
|
|
} else {
|
|
vcmd->ph_rw.spba = cpu_to_le64((uintptr_t)ppa_buf);
|
|
}
|
|
|
|
if (ubuf && bufflen) {
|
|
ret = blk_rq_map_user(q, rq, NULL, ubuf, bufflen, GFP_KERNEL);
|
|
if (ret)
|
|
goto err_ppa;
|
|
bio = rq->bio;
|
|
|
|
if (meta_buf && meta_len) {
|
|
metadata = dma_pool_alloc(dev->dma_pool, GFP_KERNEL,
|
|
&metadata_dma);
|
|
if (!metadata) {
|
|
ret = -ENOMEM;
|
|
goto err_map;
|
|
}
|
|
|
|
if (write) {
|
|
if (copy_from_user(metadata,
|
|
(void __user *)meta_buf,
|
|
meta_len)) {
|
|
ret = -EFAULT;
|
|
goto err_meta;
|
|
}
|
|
}
|
|
vcmd->ph_rw.metadata = cpu_to_le64(metadata_dma);
|
|
}
|
|
|
|
if (!disk)
|
|
goto submit;
|
|
|
|
bio->bi_bdev = bdget_disk(disk, 0);
|
|
if (!bio->bi_bdev) {
|
|
ret = -ENODEV;
|
|
goto err_meta;
|
|
}
|
|
}
|
|
|
|
submit:
|
|
blk_execute_rq_nowait(q, NULL, rq, 0, nvme_nvm_end_user_vio);
|
|
|
|
wait_for_completion_io(&wait);
|
|
|
|
ret = nvme_error_status(rq->errors);
|
|
if (result)
|
|
*result = rq->errors & 0x7ff;
|
|
if (status)
|
|
*status = le64_to_cpu(nvme_req(rq)->result.u64);
|
|
|
|
if (metadata && !ret && !write) {
|
|
if (copy_to_user(meta_buf, (void *)metadata, meta_len))
|
|
ret = -EFAULT;
|
|
}
|
|
err_meta:
|
|
if (meta_buf && meta_len)
|
|
dma_pool_free(dev->dma_pool, metadata, metadata_dma);
|
|
err_map:
|
|
if (bio) {
|
|
if (disk && bio->bi_bdev)
|
|
bdput(bio->bi_bdev);
|
|
blk_rq_unmap_user(bio);
|
|
}
|
|
err_ppa:
|
|
if (ppa_buf && ppa_len)
|
|
dma_pool_free(dev->dma_pool, ppa_list, ppa_dma);
|
|
err_rq:
|
|
blk_mq_free_request(rq);
|
|
err_cmd:
|
|
return ret;
|
|
}
|
|
|
|
static int nvme_nvm_submit_vio(struct nvme_ns *ns,
|
|
struct nvm_user_vio __user *uvio)
|
|
{
|
|
struct nvm_user_vio vio;
|
|
struct nvme_nvm_command c;
|
|
unsigned int length;
|
|
int ret;
|
|
|
|
if (copy_from_user(&vio, uvio, sizeof(vio)))
|
|
return -EFAULT;
|
|
if (vio.flags)
|
|
return -EINVAL;
|
|
|
|
memset(&c, 0, sizeof(c));
|
|
c.ph_rw.opcode = vio.opcode;
|
|
c.ph_rw.nsid = cpu_to_le32(ns->ns_id);
|
|
c.ph_rw.control = cpu_to_le16(vio.control);
|
|
c.ph_rw.length = cpu_to_le16(vio.nppas);
|
|
|
|
length = (vio.nppas + 1) << ns->lba_shift;
|
|
|
|
ret = nvme_nvm_submit_user_cmd(ns->queue, ns, &c,
|
|
(void __user *)(uintptr_t)vio.addr, length,
|
|
(void __user *)(uintptr_t)vio.metadata,
|
|
vio.metadata_len,
|
|
(void __user *)(uintptr_t)vio.ppa_list, vio.nppas,
|
|
&vio.result, &vio.status, 0);
|
|
|
|
if (ret && copy_to_user(uvio, &vio, sizeof(vio)))
|
|
return -EFAULT;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int nvme_nvm_user_vcmd(struct nvme_ns *ns, int admin,
|
|
struct nvm_passthru_vio __user *uvcmd)
|
|
{
|
|
struct nvm_passthru_vio vcmd;
|
|
struct nvme_nvm_command c;
|
|
struct request_queue *q;
|
|
unsigned int timeout = 0;
|
|
int ret;
|
|
|
|
if (copy_from_user(&vcmd, uvcmd, sizeof(vcmd)))
|
|
return -EFAULT;
|
|
if ((vcmd.opcode != 0xF2) && (!capable(CAP_SYS_ADMIN)))
|
|
return -EACCES;
|
|
if (vcmd.flags)
|
|
return -EINVAL;
|
|
|
|
memset(&c, 0, sizeof(c));
|
|
c.common.opcode = vcmd.opcode;
|
|
c.common.nsid = cpu_to_le32(ns->ns_id);
|
|
c.common.cdw2[0] = cpu_to_le32(vcmd.cdw2);
|
|
c.common.cdw2[1] = cpu_to_le32(vcmd.cdw3);
|
|
/* cdw11-12 */
|
|
c.ph_rw.length = cpu_to_le16(vcmd.nppas);
|
|
c.ph_rw.control = cpu_to_le32(vcmd.control);
|
|
c.common.cdw10[3] = cpu_to_le32(vcmd.cdw13);
|
|
c.common.cdw10[4] = cpu_to_le32(vcmd.cdw14);
|
|
c.common.cdw10[5] = cpu_to_le32(vcmd.cdw15);
|
|
|
|
if (vcmd.timeout_ms)
|
|
timeout = msecs_to_jiffies(vcmd.timeout_ms);
|
|
|
|
q = admin ? ns->ctrl->admin_q : ns->queue;
|
|
|
|
ret = nvme_nvm_submit_user_cmd(q, ns,
|
|
(struct nvme_nvm_command *)&c,
|
|
(void __user *)(uintptr_t)vcmd.addr, vcmd.data_len,
|
|
(void __user *)(uintptr_t)vcmd.metadata,
|
|
vcmd.metadata_len,
|
|
(void __user *)(uintptr_t)vcmd.ppa_list, vcmd.nppas,
|
|
&vcmd.result, &vcmd.status, timeout);
|
|
|
|
if (ret && copy_to_user(uvcmd, &vcmd, sizeof(vcmd)))
|
|
return -EFAULT;
|
|
|
|
return ret;
|
|
}
|
|
|
|
int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg)
|
|
{
|
|
switch (cmd) {
|
|
case NVME_NVM_IOCTL_ADMIN_VIO:
|
|
return nvme_nvm_user_vcmd(ns, 1, (void __user *)arg);
|
|
case NVME_NVM_IOCTL_IO_VIO:
|
|
return nvme_nvm_user_vcmd(ns, 0, (void __user *)arg);
|
|
case NVME_NVM_IOCTL_SUBMIT_VIO:
|
|
return nvme_nvm_submit_vio(ns, (void __user *)arg);
|
|
default:
|
|
return -ENOTTY;
|
|
}
|
|
}
|
|
|
|
int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node)
|
|
{
|
|
struct request_queue *q = ns->queue;
|
|
struct nvm_dev *dev;
|
|
|
|
dev = nvm_alloc_dev(node);
|
|
if (!dev)
|
|
return -ENOMEM;
|
|
|
|
dev->q = q;
|
|
memcpy(dev->name, disk_name, DISK_NAME_LEN);
|
|
dev->ops = &nvme_nvm_dev_ops;
|
|
dev->private_data = ns;
|
|
ns->ndev = dev;
|
|
|
|
return nvm_register(dev);
|
|
}
|
|
|
|
void nvme_nvm_unregister(struct nvme_ns *ns)
|
|
{
|
|
nvm_unregister(ns->ndev);
|
|
}
|
|
|
|
static ssize_t nvm_dev_attr_show(struct device *dev,
|
|
struct device_attribute *dattr, char *page)
|
|
{
|
|
struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
|
|
struct nvm_dev *ndev = ns->ndev;
|
|
struct nvm_id *id;
|
|
struct nvm_id_group *grp;
|
|
struct attribute *attr;
|
|
|
|
if (!ndev)
|
|
return 0;
|
|
|
|
id = &ndev->identity;
|
|
grp = &id->grp;
|
|
attr = &dattr->attr;
|
|
|
|
if (strcmp(attr->name, "version") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", id->ver_id);
|
|
} else if (strcmp(attr->name, "vendor_opcode") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", id->vmnt);
|
|
} else if (strcmp(attr->name, "capabilities") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", id->cap);
|
|
} else if (strcmp(attr->name, "device_mode") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", id->dom);
|
|
/* kept for compatibility */
|
|
} else if (strcmp(attr->name, "media_manager") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%s\n", "gennvm");
|
|
} else if (strcmp(attr->name, "ppa_format") == 0) {
|
|
return scnprintf(page, PAGE_SIZE,
|
|
"0x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
|
|
id->ppaf.ch_offset, id->ppaf.ch_len,
|
|
id->ppaf.lun_offset, id->ppaf.lun_len,
|
|
id->ppaf.pln_offset, id->ppaf.pln_len,
|
|
id->ppaf.blk_offset, id->ppaf.blk_len,
|
|
id->ppaf.pg_offset, id->ppaf.pg_len,
|
|
id->ppaf.sect_offset, id->ppaf.sect_len);
|
|
} else if (strcmp(attr->name, "media_type") == 0) { /* u8 */
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", grp->mtype);
|
|
} else if (strcmp(attr->name, "flash_media_type") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", grp->fmtype);
|
|
} else if (strcmp(attr->name, "num_channels") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", grp->num_ch);
|
|
} else if (strcmp(attr->name, "num_luns") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", grp->num_lun);
|
|
} else if (strcmp(attr->name, "num_planes") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", grp->num_pln);
|
|
} else if (strcmp(attr->name, "num_blocks") == 0) { /* u16 */
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", grp->num_blk);
|
|
} else if (strcmp(attr->name, "num_pages") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", grp->num_pg);
|
|
} else if (strcmp(attr->name, "page_size") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", grp->fpg_sz);
|
|
} else if (strcmp(attr->name, "hw_sector_size") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", grp->csecs);
|
|
} else if (strcmp(attr->name, "oob_sector_size") == 0) {/* u32 */
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", grp->sos);
|
|
} else if (strcmp(attr->name, "read_typ") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", grp->trdt);
|
|
} else if (strcmp(attr->name, "read_max") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", grp->trdm);
|
|
} else if (strcmp(attr->name, "prog_typ") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", grp->tprt);
|
|
} else if (strcmp(attr->name, "prog_max") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", grp->tprm);
|
|
} else if (strcmp(attr->name, "erase_typ") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", grp->tbet);
|
|
} else if (strcmp(attr->name, "erase_max") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n", grp->tbem);
|
|
} else if (strcmp(attr->name, "multiplane_modes") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "0x%08x\n", grp->mpos);
|
|
} else if (strcmp(attr->name, "media_capabilities") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "0x%08x\n", grp->mccap);
|
|
} else if (strcmp(attr->name, "max_phys_secs") == 0) {
|
|
return scnprintf(page, PAGE_SIZE, "%u\n",
|
|
ndev->ops->max_phys_sect);
|
|
} else {
|
|
return scnprintf(page,
|
|
PAGE_SIZE,
|
|
"Unhandled attr(%s) in `nvm_dev_attr_show`\n",
|
|
attr->name);
|
|
}
|
|
}
|
|
|
|
#define NVM_DEV_ATTR_RO(_name) \
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DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show, NULL)
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static NVM_DEV_ATTR_RO(version);
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static NVM_DEV_ATTR_RO(vendor_opcode);
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static NVM_DEV_ATTR_RO(capabilities);
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static NVM_DEV_ATTR_RO(device_mode);
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static NVM_DEV_ATTR_RO(ppa_format);
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static NVM_DEV_ATTR_RO(media_manager);
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static NVM_DEV_ATTR_RO(media_type);
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static NVM_DEV_ATTR_RO(flash_media_type);
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static NVM_DEV_ATTR_RO(num_channels);
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static NVM_DEV_ATTR_RO(num_luns);
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static NVM_DEV_ATTR_RO(num_planes);
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static NVM_DEV_ATTR_RO(num_blocks);
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static NVM_DEV_ATTR_RO(num_pages);
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static NVM_DEV_ATTR_RO(page_size);
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static NVM_DEV_ATTR_RO(hw_sector_size);
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static NVM_DEV_ATTR_RO(oob_sector_size);
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static NVM_DEV_ATTR_RO(read_typ);
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static NVM_DEV_ATTR_RO(read_max);
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static NVM_DEV_ATTR_RO(prog_typ);
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static NVM_DEV_ATTR_RO(prog_max);
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static NVM_DEV_ATTR_RO(erase_typ);
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static NVM_DEV_ATTR_RO(erase_max);
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static NVM_DEV_ATTR_RO(multiplane_modes);
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static NVM_DEV_ATTR_RO(media_capabilities);
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static NVM_DEV_ATTR_RO(max_phys_secs);
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static struct attribute *nvm_dev_attrs[] = {
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&dev_attr_version.attr,
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&dev_attr_vendor_opcode.attr,
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&dev_attr_capabilities.attr,
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&dev_attr_device_mode.attr,
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&dev_attr_media_manager.attr,
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&dev_attr_ppa_format.attr,
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&dev_attr_media_type.attr,
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&dev_attr_flash_media_type.attr,
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&dev_attr_num_channels.attr,
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&dev_attr_num_luns.attr,
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&dev_attr_num_planes.attr,
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&dev_attr_num_blocks.attr,
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&dev_attr_num_pages.attr,
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&dev_attr_page_size.attr,
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&dev_attr_hw_sector_size.attr,
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&dev_attr_oob_sector_size.attr,
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&dev_attr_read_typ.attr,
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&dev_attr_read_max.attr,
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&dev_attr_prog_typ.attr,
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&dev_attr_prog_max.attr,
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&dev_attr_erase_typ.attr,
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&dev_attr_erase_max.attr,
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&dev_attr_multiplane_modes.attr,
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&dev_attr_media_capabilities.attr,
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&dev_attr_max_phys_secs.attr,
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NULL,
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};
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static const struct attribute_group nvm_dev_attr_group = {
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.name = "lightnvm",
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.attrs = nvm_dev_attrs,
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};
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int nvme_nvm_register_sysfs(struct nvme_ns *ns)
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{
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return sysfs_create_group(&disk_to_dev(ns->disk)->kobj,
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&nvm_dev_attr_group);
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}
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void nvme_nvm_unregister_sysfs(struct nvme_ns *ns)
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{
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sysfs_remove_group(&disk_to_dev(ns->disk)->kobj,
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&nvm_dev_attr_group);
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}
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/* move to shared place when used in multiple places. */
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#define PCI_VENDOR_ID_CNEX 0x1d1d
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#define PCI_DEVICE_ID_CNEX_WL 0x2807
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#define PCI_DEVICE_ID_CNEX_QEMU 0x1f1f
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int nvme_nvm_ns_supported(struct nvme_ns *ns, struct nvme_id_ns *id)
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{
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struct nvme_ctrl *ctrl = ns->ctrl;
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/* XXX: this is poking into PCI structures from generic code! */
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struct pci_dev *pdev = to_pci_dev(ctrl->dev);
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/* QEMU NVMe simulator - PCI ID + Vendor specific bit */
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if (pdev->vendor == PCI_VENDOR_ID_CNEX &&
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pdev->device == PCI_DEVICE_ID_CNEX_QEMU &&
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id->vs[0] == 0x1)
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return 1;
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/* CNEX Labs - PCI ID + Vendor specific bit */
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if (pdev->vendor == PCI_VENDOR_ID_CNEX &&
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pdev->device == PCI_DEVICE_ID_CNEX_WL &&
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id->vs[0] == 0x1)
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return 1;
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return 0;
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}
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