bhyve: Create EUI64 for NVMe namespaces
Accept an IEEE Extended Unique Identifier (EUI-64) from the command line for each NVMe namespace. If one isn't provided, it will create one based on the CRC16 of: - the FreeBSD IEEE OUI - PCI bus, device/slot, function values - Namespace ID Reviewed by: imp, araujo, jhb, rgrimes Approved by: imp (mentor), jhb (maintainer) MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D19905
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@ -77,4 +77,9 @@
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*/
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#define OUI_FREEBSD_GENERATED_MASK 0x10ffff
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#define OUI_FREEBSD_GENERATED_LOW OUI_FREEBSD(0x100000)
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#define OUI_FREEBSD_GENERATED_HIGH OUI_FREEBSD(OU_FREEBSD_GENERATED_MASK)
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#define OUI_FREEBSD_GENERATED_HIGH OUI_FREEBSD(OUI_FREEBSD_GENERATED_MASK)
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/* Allocate 16 bits for emulated NVMe devices */
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#define OUI_FREEBSD_NVME_MASK 0x20ffff
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#define OUI_FREEBSD_NVME_LOW OUI_FREEBSD(0x200000)
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#define OUI_FRREBSD_NVME_HIGH OUI_FREEBSD(OUI_FREEBSD_NVME_MASK)
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@ -4,6 +4,9 @@
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* Copyright (c) 2017 Shunsuke Mie
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* Copyright (c) 2018 Leon Dang
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*
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* Function crc16 Copyright (c) 2017, Fedor Uporov
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* Obtained from function ext2_crc16() in sys/fs/ext2fs/ext2_csum.c
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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@ -30,7 +33,7 @@
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* bhyve PCIe-NVMe device emulation.
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*
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* options:
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* -s <n>,nvme,devpath,maxq=#,qsz=#,ioslots=#,sectsz=#,ser=A-Z
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* -s <n>,nvme,devpath,maxq=#,qsz=#,ioslots=#,sectsz=#,ser=A-Z,eui64=#
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*
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* accepted devpath:
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* /dev/blockdev
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@ -42,6 +45,7 @@
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* ioslots = max number of concurrent io requests
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* sectsz = sector size (defaults to blockif sector size)
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* ser = serial number (20-chars max)
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* eui64 = IEEE Extended Unique Identifier (8 byte value)
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*
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*/
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@ -54,6 +58,7 @@
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <net/ieee_oui.h>
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#include <assert.h>
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#include <pthread.h>
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@ -164,6 +169,7 @@ struct pci_nvme_blockstore {
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uint64_t size;
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uint32_t sectsz;
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uint32_t sectsz_bits;
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uint64_t eui64;
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};
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struct pci_nvme_ioreq {
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@ -352,12 +358,61 @@ pci_nvme_init_ctrldata(struct pci_nvme_softc *sc)
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cd->power_state[0].mp = 10;
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}
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static void
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pci_nvme_init_nsdata(struct pci_nvme_softc *sc)
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/*
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* Calculate the CRC-16 of the given buffer
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* See copyright attribution at top of file
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*/
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static uint16_t
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crc16(uint16_t crc, const void *buffer, unsigned int len)
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{
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struct nvme_namespace_data *nd;
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const unsigned char *cp = buffer;
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/* CRC table for the CRC-16. The poly is 0x8005 (x16 + x15 + x2 + 1). */
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static uint16_t const crc16_table[256] = {
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0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
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0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
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0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
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0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
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0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
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0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
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0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
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0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
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0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
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0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
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0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
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0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
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0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
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0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
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0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,
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0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,
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0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,
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0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,
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0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,
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0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,
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0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
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0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,
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0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,
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0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,
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0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,
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0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,
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0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,
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0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
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0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,
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0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
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0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
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0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040
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};
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nd = &sc->nsdata;
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while (len--)
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crc = (((crc >> 8) & 0xffU) ^
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crc16_table[(crc ^ *cp++) & 0xffU]) & 0x0000ffffU;
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return crc;
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}
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static void
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pci_nvme_init_nsdata(struct pci_nvme_softc *sc,
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struct nvme_namespace_data *nd, uint32_t nsid,
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uint64_t eui64)
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{
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nd->nsze = sc->nvstore.size / sc->nvstore.sectsz;
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nd->ncap = nd->nsze;
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@ -365,10 +420,25 @@ pci_nvme_init_nsdata(struct pci_nvme_softc *sc)
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/* Get LBA and backstore information from backing store */
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nd->nlbaf = 0; /* NLBAF is a 0's based value (i.e. 1 LBA Format) */
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nd->flbas = 0;
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/* Create an EUI-64 if user did not provide one */
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if (eui64 == 0) {
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char *data = NULL;
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asprintf(&data, "%s%u%u%u", vmname, sc->nsc_pi->pi_bus,
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sc->nsc_pi->pi_slot, sc->nsc_pi->pi_func);
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if (data != NULL) {
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eui64 = OUI_FREEBSD_NVME_LOW | crc16(0, data, strlen(data));
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free(data);
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}
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eui64 = (eui64 << 16) | (nsid & 0xffff);
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}
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be64enc(nd->eui64, eui64);
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/* LBA data-sz = 2^lbads */
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nd->lbaf[0] = sc->nvstore.sectsz_bits << NVME_NS_DATA_LBAF_LBADS_SHIFT;
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nd->flbas = 0;
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}
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static void
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@ -1817,6 +1887,8 @@ pci_nvme_parse_opts(struct pci_nvme_softc *sc, char *opts)
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free(uopt);
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return (-1);
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}
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} else if (!strcmp("eui64", xopts)) {
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sc->nvstore.eui64 = htobe64(strtoull(config, NULL, 0));
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} else if (optidx == 0) {
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snprintf(bident, sizeof(bident), "%d:%d",
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sc->nsc_pi->pi_slot, sc->nsc_pi->pi_func);
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@ -1937,7 +2009,7 @@ pci_nvme_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts)
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pci_nvme_reset(sc);
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pci_nvme_init_ctrldata(sc);
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pci_nvme_init_nsdata(sc);
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pci_nvme_init_nsdata(sc, &sc->nsdata, 1, sc->nvstore.eui64);
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pci_nvme_init_logpages(sc);
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pci_lintr_request(pi);
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