platform-intel.h

   1 /*
   2  * Intel(R) Matrix Storage Manager hardware and firmware support routines
   3  *
   4  * Copyright (C) 2008 Intel Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19 #include <asm/types.h>
  20 #include <strings.h>
  21
  22 /* The IMSM Capability (IMSM AHCI and ISCU OROM/EFI variable) Version Table definition */
  23 struct imsm_orom {
  24         __u8 signature[4];
  25         #define IMSM_OROM_SIGNATURE "$VER"
  26         #define IMSM_NVME_OROM_COMPAT_SIGNATURE "$NVM"
  27         __u8 table_ver_major; /* Currently 2 (can change with future revs) */
  28         __u8 table_ver_minor; /* Currently 2 (can change with future revs) */
  29         __u16 major_ver; /* Example: 8 as in 8.6.0.1020 */
  30         __u16 minor_ver; /* Example: 6 as in 8.6.0.1020 */
  31         __u16 hotfix_ver; /* Example: 0 as in 8.6.0.1020 */
  32         __u16 build; /* Example: 1020 as in 8.6.0.1020 */
  33         __u8 len; /* number of bytes in this entire table */
  34         __u8 checksum; /* checksum of all the bytes in this table */
  35         __u16 rlc; /* RAID Level Capability */
  36         /* we assume the cpu is x86 as the orom should not be found
  37          * anywhere else
  38          */
  39         #define IMSM_OROM_RLC_RAID0 (1 << 0)
  40         #define IMSM_OROM_RLC_RAID1 (1 << 1)
  41         #define IMSM_OROM_RLC_RAID10 (1 << 2)
  42         #define IMSM_OROM_RLC_RAID1E (1 << 3)
  43         #define IMSM_OROM_RLC_RAID5 (1 << 4)
  44         #define IMSM_OROM_RLC_RAID_CNG (1 << 5)
  45         __u16 sss; /* Strip Size Supported */
  46         #define IMSM_OROM_SSS_2kB (1 << 0)
  47         #define IMSM_OROM_SSS_4kB (1 << 1)
  48         #define IMSM_OROM_SSS_8kB (1 << 2)
  49         #define IMSM_OROM_SSS_16kB (1 << 3)
  50         #define IMSM_OROM_SSS_32kB (1 << 4)
  51         #define IMSM_OROM_SSS_64kB (1 << 5)
  52         #define IMSM_OROM_SSS_128kB (1 << 6)
  53         #define IMSM_OROM_SSS_256kB (1 << 7)
  54         #define IMSM_OROM_SSS_512kB (1 << 8)
  55         #define IMSM_OROM_SSS_1MB (1 << 9)
  56         #define IMSM_OROM_SSS_2MB (1 << 10)
  57         #define IMSM_OROM_SSS_4MB (1 << 11)
  58         #define IMSM_OROM_SSS_8MB (1 << 12)
  59         #define IMSM_OROM_SSS_16MB (1 << 13)
  60         #define IMSM_OROM_SSS_32MB (1 << 14)
  61         #define IMSM_OROM_SSS_64MB (1 << 15)
  62         __u16 dpa; /* Disks Per Array supported */
  63         #define IMSM_OROM_DISKS_PER_ARRAY 6
  64         #define IMSM_OROM_DISKS_PER_ARRAY_NVME 12
  65         __u16 tds; /* Total Disks Supported */
  66         #define IMSM_OROM_TOTAL_DISKS 6
  67         #define IMSM_OROM_TOTAL_DISKS_NVME 12
  68         __u8 vpa; /* # Volumes Per Array supported */
  69         #define IMSM_OROM_VOLUMES_PER_ARRAY 2
  70         __u8 vphba; /* # Volumes Per Host Bus Adapter supported */
  71         #define IMSM_OROM_VOLUMES_PER_HBA 4
  72         #define IMSM_OROM_VOLUMES_PER_HBA_NVME 4
  73         /* Attributes supported. This should map to the
  74          * attributes in the MPB. Also, lower 16 bits
  75          * should match/duplicate RLC bits above.
  76          */
  77         __u32 attr;
  78         #define IMSM_OROM_ATTR_RAID0 IMSM_OROM_RLC_RAID0
  79         #define IMSM_OROM_ATTR_RAID1 IMSM_OROM_RLC_RAID1
  80         #define IMSM_OROM_ATTR_RAID10 IMSM_OROM_RLC_RAID10
  81         #define IMSM_OROM_ATTR_RAID1E IMSM_OROM_RLC_RAID1E
  82         #define IMSM_OROM_ATTR_RAID5 IMSM_OROM_RLC_RAID5
  83         #define IMSM_OROM_ATTR_RAID_CNG IMSM_OROM_RLC_RAID_CNG
  84         #define IMSM_OROM_ATTR_2TB_DISK (1 << 26)
  85         #define IMSM_OROM_ATTR_2TB (1 << 29)
  86         #define IMSM_OROM_ATTR_PM (1 << 30)
  87         #define IMSM_OROM_ATTR_ChecksumVerify (1 << 31)
  88         __u32 capabilities;
  89         #define IMSM_OROM_CAPABILITIES_Ext_SATA (1 << 0)
  90         #define IMSM_OROM_CAPABILITIES_TurboMemory (1 << 1)
  91         #define IMSM_OROM_CAPABILITIES_HddPassword (1 << 2)
  92         #define IMSM_OROM_CAPABILITIES_DiskCoercion (1 << 3)
  93         __u32 driver_features;
  94         #define IMSM_OROM_CAPABILITIES_HDDUnlock (1 << 0)
  95         #define IMSM_OROM_CAPABILITIES_LEDLoc (1 << 1)
  96         #define IMSM_OROM_CAPABILITIES_EnterpriseSystem (1 << 2)
  97         #define IMSM_OROM_CAPABILITIES_Zpodd (1 << 3)
  98         #define IMSM_OROM_CAPABILITIES_LargeDramCache (1 << 4)
  99         #define IMSM_OROM_CAPABILITIES_Rohi (1 << 5)
 100         #define IMSM_OROM_CAPABILITIES_ReadPatrol (1 << 6)
 101         #define IMSM_OROM_CAPABILITIES_XorHw (1 << 7)
 102 } __attribute__((packed));
 103
 104 static inline int imsm_orom_has_raid0(const struct imsm_orom *orom)
 105 {
 106         return !!(orom->rlc & IMSM_OROM_RLC_RAID0);
 107 }
 108 static inline int imsm_orom_has_raid1(const struct imsm_orom *orom)
 109 {
 110         return !!(orom->rlc & IMSM_OROM_RLC_RAID1);
 111 }
 112 static inline int imsm_orom_has_raid1e(const struct imsm_orom *orom)
 113 {
 114         return !!(orom->rlc & IMSM_OROM_RLC_RAID1E);
 115 }
 116 static inline int imsm_orom_has_raid10(const struct imsm_orom *orom)
 117 {
 118         return !!(orom->rlc & IMSM_OROM_RLC_RAID10);
 119 }
 120 static inline int imsm_orom_has_raid5(const struct imsm_orom *orom)
 121 {
 122         return !!(orom->rlc & IMSM_OROM_RLC_RAID5);
 123 }
 124
 125 /**
 126  * imsm_orom_has_chunk - check if the orom supports the given chunk size
 127  * @orom: orom pointer from find_imsm_orom
 128  * @chunk: chunk size in kibibytes
 129  */
 130 static inline int imsm_orom_has_chunk(const struct imsm_orom *orom, int chunk)
 131 {
 132         int fs = ffs(chunk);
 133         if (!fs)
 134                 return 0;
 135         fs--; /* bit num to bit index */
 136         if (chunk & (chunk-1))
 137                 return 0; /* not a power of 2 */
 138         return !!(orom->sss & (1 << (fs - 1)));
 139 }
 140
 141 /**
 142  * fls - find last (most-significant) bit set
 143  * @x: the word to search
 144  * The funciton is borrowed from Linux kernel code
 145  * include/asm-generic/bitops/fls.h
 146  */
 147 static inline int fls(int x)
 148 {
 149         int r = 32;
 150
 151         if (!x)
 152                 return 0;
 153         if (!(x & 0xffff0000u)) {
 154                 x <<= 16;
 155                 r -= 16;
 156         }
 157         if (!(x & 0xff000000u)) {
 158                 x <<= 8;
 159                 r -= 8;
 160         }
 161         if (!(x & 0xf0000000u)) {
 162                 x <<= 4;
 163                 r -= 4;
 164         }
 165         if (!(x & 0xc0000000u)) {
 166                 x <<= 2;
 167                 r -= 2;
 168         }
 169         if (!(x & 0x80000000u)) {
 170                 x <<= 1;
 171                 r -= 1;
 172         }
 173         return r;
 174 }
 175
 176 static inline int imsm_orom_is_enterprise(const struct imsm_orom *orom)
 177 {
 178         return !!(orom->driver_features & IMSM_OROM_CAPABILITIES_EnterpriseSystem);
 179 }
 180
 181 static inline int imsm_orom_is_nvme(const struct imsm_orom *orom)
 182 {
 183         return memcmp(orom->signature, IMSM_NVME_OROM_COMPAT_SIGNATURE,
 184                         sizeof(orom->signature)) == 0;
 185 }
 186
 187 enum sys_dev_type {
 188         SYS_DEV_UNKNOWN = 0,
 189         SYS_DEV_SAS,
 190         SYS_DEV_SATA,
 191         SYS_DEV_NVME,
 192         SYS_DEV_VMD,
 193         SYS_DEV_MAX
 194 };
 195
 196 struct sys_dev {
 197         enum sys_dev_type type;
 198         char *path;
 199         char *pci_id;
 200         __u16  dev_id;
 201         __u32  class;
 202         struct sys_dev *next;
 203 };
 204
 205 struct efi_guid {
 206         __u8 b[16];
 207 };
 208
 209 struct devid_list {
 210         __u16 devid;
 211         struct devid_list *next;
 212 };
 213
 214 struct orom_entry {
 215         struct imsm_orom orom;
 216         struct devid_list *devid_list;
 217         enum sys_dev_type type;
 218         struct orom_entry *next;
 219 };
 220
 221 extern struct orom_entry *orom_entries;
 222
 223 static inline char *guid_str(char *buf, struct efi_guid guid)
 224 {
 225         sprintf(buf, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
 226                  guid.b[3], guid.b[2], guid.b[1], guid.b[0],
 227                  guid.b[5], guid.b[4], guid.b[7], guid.b[6],
 228                  guid.b[8], guid.b[9], guid.b[10], guid.b[11],
 229                  guid.b[12], guid.b[13], guid.b[14], guid.b[15]);
 230         return buf;
 231 }
 232
 233 char *diskfd_to_devpath(int fd);
 234 __u16 devpath_to_vendor(const char *dev_path);
 235 struct sys_dev *find_driver_devices(const char *bus, const char *driver);
 236 struct sys_dev *find_intel_devices(void);
 237 const struct imsm_orom *find_imsm_capability(struct sys_dev *hba);
 238 const struct imsm_orom *find_imsm_orom(void);
 239 int disk_attached_to_hba(int fd, const char *hba_path);
 240 int devt_attached_to_hba(dev_t dev, const char *hba_path);
 241 char *devt_to_devpath(dev_t dev);
 242 int path_attached_to_hba(const char *disk_path, const char *hba_path);
 243 const char *get_sys_dev_type(enum sys_dev_type);
 244 const struct orom_entry *get_orom_entry_by_device_id(__u16 dev_id);
 245 const struct imsm_orom *get_orom_by_device_id(__u16 device_id);
 246 struct sys_dev *device_by_id(__u16 device_id);
 247 char *vmd_domain_to_controller(struct sys_dev *hba, char *buf);