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/* $OpenBSD: nvmereg.h,v 1.3 2014/04/15 10:28:07 dlg Exp $ */
/*
* Copyright (c) 2014 David Gwynne <dlg@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define NVME_CAP 0x0000 /* Controller Capabilities */
#define NVME_CAP_MPSMAX(_r) (12 + (((_r) >> 52) & 0xf)) /* shift */
#define NVME_CAP_MPSMIN(_r) (12 + (((_r) >> 48) & 0xf)) /* shift */
#define NVME_CAP_CSS(_r) (((_r) >> 37) & 0x7f)
#define NVME_CAP_CSS_NVM (1 << 0)
#define NVME_CAP_NSSRS(_r) ISSET((_r), (1ULL << 36))
#define NVME_CAP_DSTRD(_r) (1 << (2 + (((_r) >> 32) & 0xf))) /* bytes */
#define NVME_CAP_TO(_r) (500 * (((_r) >> 24) & 0xff)) /* ms */
#define NVME_CAP_AMS(_r) (((_r) >> 17) & 0x3)
#define NVME_CAP_AMS_WRR (1 << 0)
#define NVME_CAP_AMS_VENDOR (1 << 1)
#define NVME_CAP_CQR(_r) ISSET((_r), (1 << 16))
#define NVME_CAP_MQES(_r) ((_r) & 0xffff)
#define NVME_CAP_LO 0x0000
#define NVME_CAP_HI 0x0004
#define NVME_VS 0x0008 /* Version */
#define NVME_VS_MJR(_r) (((_r) >> 16) & 0xffff)
#define NVME_VS_MNR(_r) ((_r) & 0xffff)
#define NVME_INTMS 0x000c /* Interrupt Mask Set */
#define NVME_INTMC 0x0010 /* Interrupt Mask Clear */
#define NVME_CC 0x0014 /* Controller Configuration */
#define NVME_CC_IOCQES(_v) (((_v) & 0xf) << 20)
#define NVME_CC_IOCQES_MASK NVME_CC_IOCQES(0xf)
#define NVME_CC_IOCQES_R(_v) (((_v) >> 20) & 0xf)
#define NVME_CC_IOSQES(_v) (((_v) & 0xf) << 16)
#define NVME_CC_IOSQES_MASK NVME_CC_IOSQES(0xf)
#define NVME_CC_IOSQES_R(_v) (((_v) >> 16) & 0xf)
#define NVME_CC_SHN(_v) (((_v) & 0x3) << 14)
#define NVME_CC_SHN_MASK NVME_CC_SHN(0x3)
#define NVME_CC_SHN_R(_v) (((_v) >> 15) & 0x3)
#define NVME_CC_SHN_NONE 0
#define NVME_CC_SHN_NORMAL 1
#define NVME_CC_SHN_ABRUPT 2
#define NVME_CC_AMS(_v) (((_v) & 0x7) << 11)
#define NVME_CC_AMS_MASK NVME_CC_AMS(0x7)
#define NVME_CC_AMS_R(_v) (((_v) >> 11) & 0xf)
#define NVME_CC_AMS_RR 0 /* round-robin */
#define NVME_CC_AMS_WRR_U 1 /* weighted round-robin w/ urgent */
#define NVME_CC_AMS_VENDOR 7 /* vendor */
#define NVME_CC_MPS(_v) ((((_v) - 12) & 0xf) << 7)
#define NVME_CC_MPS_MASK (0xf << 7)
#define NVME_CC_MPS_R(_v) (12 + (((_v) >> 7) & 0xf))
#define NVME_CC_CSS(_v) (((_v) & 0x7) << 4)
#define NVME_CC_CSS_MASK NVME_CC_CSS(0x7)
#define NVME_CC_CSS_R(_v) (((_v) >> 4) & 0x7)
#define NVME_CC_CSS_NVM 0
#define NVME_CC_EN (1 << 0)
#define NVME_CSTS 0x001c /* Controller Status */
#define NVME_CSTS_CFS (1 << 1)
#define NVME_CSTS_RDY (1 << 0)
#define NVME_NSSR 0x0020 /* NVM Subsystem Reset (Optional) */
#define NVME_AQA 0x0024 /* Admin Queue Attributes */
/* Admin Completion Queue Size */
#define NVME_AQA_ACQS(_v) (((_v) - 1) << 16)
/* Admin Submission Queue Size */
#define NVME_AQA_ASQS(_v) (((_v) - 1) << 0)
#define NVME_ASQ 0x0028 /* Admin Submission Queue Base Address */
#define NVME_ACQ 0x0030 /* Admin Completion Queue Base Address */
#define NVME_ADMIN_Q 0
/* Submission Queue Tail Doorbell */
#define NVME_SQTDBL(_q, _s) (0x1000 + (2 * (_q) + 0) * (_s))
/* Completion Queue Head Doorbell */
#define NVME_CQHDBL(_q, _s) (0x1000 + (2 * (_q) + 1) * (_s))
struct nvme_sge {
u_int8_t id;
u_int8_t _reserved[15];
} __packed __aligned(8);
struct nvme_sge_data {
u_int8_t id;
u_int8_t _reserved[3];
u_int32_t length;
u_int64_t address;
} __packed __aligned(8);
struct nvme_sge_bit_bucket {
u_int8_t id;
u_int8_t _reserved[3];
u_int32_t length;
u_int64_t address;
} __packed __aligned(8);
struct nvme_sqe {
u_int8_t opcode;
u_int8_t flags;
u_int16_t cid;
u_int32_t nsid;
u_int8_t _reserved[8];
u_int64_t mptr;
union {
u_int64_t prp[2];
struct nvme_sge sge;
} __packed entry;
u_int32_t cdw10;
u_int32_t cdw11;
u_int32_t cdw12;
u_int32_t cdw13;
u_int32_t cdw14;
u_int32_t cdw15;
} __packed __aligned(8);
struct nvme_cqe {
u_int32_t cdw0;
u_int32_t _reserved;
u_int16_t sqhd; /* SQ Head Pointer */
u_int16_t sqid; /* SQ Identifier */
u_int16_t cid; /* Command Identifier */
u_int16_t flags;
#define NVME_CQE_DNR (1 << 15)
#define NVME_CQE_M (1 << 14)
#define NVME_CQE_SQT(_f) (((_f) >> 8) & 0x7)
#define NVME_CQE_SC(_f) (((_f) >> 1) & 0x7f)
#define NVME_CQE_PHASE (1 << 0)
} __packed __aligned(8);
#define NVM_ADMIN_DEL_IOSQ 0x00 /* Delete I/O Submission Queue */
#define NVM_ADMIN_ADD_IOSQ 0x01 /* Create I/O Submission Queue */
#define NVM_ADMIN_GET_LOG_PG 0x02 /* Get Log Page */
#define NVM_ADMIN_DEL_IOCQ 0x04 /* Delete I/O Completion Queue */
#define NVM_ADMIN_ADD_IOCQ 0x05 /* Create I/O Completion Queue */
#define NVM_ADMIN_IDENTIFY 0x06 /* Identify */
#define NVM_ADMIN_ABORT 0x08 /* Abort */
#define NVM_ADMIN_SET_FEATURES 0x09 /* Set Features */
#define NVM_ADMIN_GET_FEATURES 0x0a /* Get Features */
#define NVM_ADMIN_ASYNC_EV_REQ 0x0c /* Asynchronous Event Request */
#define NVM_ADMIN_FW_ACTIVATE 0x10 /* Firmware Activate */
#define NVM_ADMIN_FW_DOWNLOAD 0x11 /* Firmware Image Download */
/* Power State Descriptor Data */
struct nvm_identify_psd {
u_int16_t mp; /* Max Power */
u_int16_t flags;
u_int32_t enlat; /* Entry Latency */
u_int32_t exlat; /* Exit Latency */
u_int8_t rrt; /* Relative Read Throughput */
u_int8_t rrl; /* Relative Read Latency */
u_int8_t rwt; /* Relative Write Throughput */
u_int8_t rwl; /* Relative Write Latency */
u_int8_t _reserved[16];
} __packed __aligned(8);
struct nvm_identify_controller {
/* Controller Capabilities and Features */
u_int16_t vid; /* PCI Vendor ID */
u_int16_t ssvid; /* PCI Subsystem Vendor ID */
u_int8_t sn[20]; /* Serial Number */
u_int8_t mn[40]; /* Model Number */
u_int8_t fr[40]; /* Firmware Revision */
u_int8_t rab; /* Recommended Arbitration Burst */
u_int8_t ieee[3]; /* IEEE OUI Identifier */
u_int8_t cmic; /* Controller Multi-Path I/O and
Namespace Sharing Capabilities */
u_int8_t mdts; /* Maximum Data Transfer Size */
u_int16_t cntlid; /* Controller ID */
u_int8_t _reserved1[176];
/* Admin Command Set Attributes & Optional Controller Capabilities */
u_int16_t oacs; /* Optional Admin Command Support */
u_int8_t acl; /* Abort Command Limit */
u_int8_t aerl; /* Asynchronous Event Request Limit */
u_int8_t frmw; /* Firmware Updates */
u_int8_t lpa; /* Log Page Attributes */
u_int8_t elpe; /* Error Log Page Entries */
u_int8_t npss; /* Number of Power States Support */
u_int8_t avscc; /* Admin Vendor Specific Command
Configuration */
u_int8_t apsta; /* Autonomous Power State Transition
Attributes */
u_int8_t _reserved2[246];
/* NVM Command Set Attributes */
u_int8_t sqes; /* Submission Queue Entry Size */
u_int8_t cqes; /* Completion Queue Entry Size */
u_int8_t _reserved3[2];
u_int32_t nn; /* Number of Namespaces */
u_int16_t oncs; /* Optional NVM Command Support */
u_int16_t fuses; /* Fused Operation Support */
u_int8_t fna; /* Format NVM Attributes */
u_int8_t vwc; /* Volatile Write Cache */
u_int16_t awun; /* Atomic Write Unit Normal */
u_int16_t awupf; /* Atomic Write Unit Power Fail */
u_int8_t nvscc; /* NVM Vendor Specific Command */
u_int8_t _reserved4[1];
u_int16_t acwu; /* Atomic Compare & Write Unit */
u_int8_t _reserved5[2];
u_int32_t sgls; /* SGL Support */
u_int8_t _reserved6[164];
/* I/O Command Set Attributes */
u_int8_t _reserved7[1344];
/* Power State Descriptors */
struct nvm_identify_psd psd[32]; /* Power State Descriptors */
/* Vendor Specific */
u_int8_t _reserved8[1024];
} __packed __aligned(8);
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