Merge ../linux-2.6

18 files changed, 301 insertions, 38 deletions

diff --git a/include/Kbuild b/include/Kbuild
index bdca155028ec..d8c3e3cbf416 100644
--- a/include/Kbuild
+++ b/include/Kbuild
@@ -1,3 +1,6 @@
+# Top-level Makefile calls into asm-$(ARCH)
+# List only non-arch directories below
+
 header-y += asm-generic/
 header-y += linux/
 header-y += sound/
@@ -5,5 +8,3 @@ header-y += mtd/
 header-y += rdma/
 header-y += video/
 header-y += drm/
-
-header-y += asm-$(ARCH)/
diff --git a/include/asm-avr32/arch-at32ap/board.h b/include/asm-avr32/arch-at32ap/board.h
index 893aa6d0cd11..e60e9076544d 100644
--- a/include/asm-avr32/arch-at32ap/board.h
+++ b/include/asm-avr32/arch-at32ap/board.h
@@ -82,7 +82,15 @@ struct mci_platform_data;
 struct platform_device *
 at32_add_device_mci(unsigned int id, struct mci_platform_data *data);
 
-struct platform_device *at32_add_device_ac97c(unsigned int id);
+struct ac97c_platform_data {
+        unsigned short dma_rx_periph_id;
+        unsigned short dma_tx_periph_id;
+        unsigned short dma_controller_id;
+        int reset_pin;
+};
+struct platform_device *
+at32_add_device_ac97c(unsigned int id, struct ac97c_platform_data *data);
+
 struct platform_device *at32_add_device_abdac(unsigned int id);
 struct platform_device *at32_add_device_psif(unsigned int id);
 
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 9cd44b162ba1..6d88a923c945 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -221,6 +221,7 @@
  * during second ld run in second ld pass when generating System.map */
 #define TEXT_TEXT                                                       \
                 ALIGN_FUNCTION();                                       \
+                *(.text.hot)                                            \
                 *(.text)                                                \
                 *(.ref.text)                                            \
                 *(.text.init.refok)                                     \
@@ -230,7 +231,8 @@
         CPU_KEEP(init.text)                                             \
         CPU_KEEP(exit.text)                                             \
         MEM_KEEP(init.text)                                             \
-        MEM_KEEP(exit.text)
+        MEM_KEEP(exit.text)                                             \
+                *(.text.unlikely)
 
 
 /* sched.text is aling to function alignment to secure we have same
diff --git a/include/asm-powerpc/kvm_ppc.h b/include/asm-powerpc/kvm_ppc.h
index 5a21115228af..a8b068792260 100644
--- a/include/asm-powerpc/kvm_ppc.h
+++ b/include/asm-powerpc/kvm_ppc.h
@@ -61,7 +61,8 @@ extern int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu);
 
 extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gfn_t gfn,
                            u64 asid, u32 flags);
-extern void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, u64 eaddr, u64 asid);
+extern void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, gva_t eaddr,
+                                  gva_t eend, u32 asid);
 extern void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode);
 
 extern void kvmppc_check_and_deliver_interrupts(struct kvm_vcpu *vcpu);
diff --git a/include/asm-s390/kvm_host.h b/include/asm-s390/kvm_host.h
index 3234dd5b3511..3c55e4107dcc 100644
--- a/include/asm-s390/kvm_host.h
+++ b/include/asm-s390/kvm_host.h
@@ -111,7 +111,7 @@ struct kvm_vcpu_stat {
         u32 exit_validity;
         u32 exit_instruction;
         u32 instruction_lctl;
-        u32 instruction_lctg;
+        u32 instruction_lctlg;
         u32 exit_program_interruption;
         u32 exit_instr_and_program;
         u32 deliver_emergency_signal;
@@ -231,5 +231,5 @@ struct kvm_arch{
         struct kvm_s390_float_interrupt float_int;
 };
 
-extern int sie64a(struct kvm_s390_sie_block *, __u64 *);
+extern int sie64a(struct kvm_s390_sie_block *, unsigned long *);
 #endif
diff --git a/include/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h
index fdde0bedaa90..bc34dc21f178 100644
--- a/include/asm-x86/kvm_host.h
+++ b/include/asm-x86/kvm_host.h
@@ -556,6 +556,7 @@ int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
 
 void kvm_enable_tdp(void);
+void kvm_disable_tdp(void);
 
 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 int complete_pio(struct kvm_vcpu *vcpu);
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index ffe479ba0779..35a78415accc 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -748,6 +748,7 @@
 #define PCI_VENDOR_ID_TI                0x104c
 #define PCI_DEVICE_ID_TI_TVP4020        0x3d07
 #define PCI_DEVICE_ID_TI_4450           0x8011
+#define PCI_DEVICE_ID_TI_TSB43AB22      0x8023
 #define PCI_DEVICE_ID_TI_XX21_XX11      0x8031
 #define PCI_DEVICE_ID_TI_XX21_XX11_FM   0x8033
 #define PCI_DEVICE_ID_TI_XX21_XX11_SD   0x8034
diff --git a/include/linux/sched.h b/include/linux/sched.h
index f59318a0099b..034c1ca6b332 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -505,10 +505,7 @@ struct signal_struct {
         unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
         unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
         unsigned long inblock, oublock, cinblock, coublock;
-#ifdef CONFIG_TASK_XACCT
-        u64 rchar, wchar, syscr, syscw;
-#endif
-        struct task_io_accounting ioac;
+        struct proc_io_accounting ioac;
 
         /*
          * Cumulative ns of scheduled CPU time for dead threads in the
@@ -1256,11 +1253,7 @@ struct task_struct {
 
         unsigned long ptrace_message;
         siginfo_t *last_siginfo; /* For ptrace use.  */
-#ifdef CONFIG_TASK_XACCT
-/* i/o counters(bytes read/written, #syscalls */
-        u64 rchar, wchar, syscr, syscw;
-#endif
-        struct task_io_accounting ioac;
+        struct proc_io_accounting ioac;
 #if defined(CONFIG_TASK_XACCT)
         u64 acct_rss_mem1;      /* accumulated rss usage */
         u64 acct_vm_mem1;       /* accumulated virtual memory usage */
@@ -2190,22 +2183,22 @@ extern long sched_group_rt_period(struct task_group *tg);
 #ifdef CONFIG_TASK_XACCT
 static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
 {
-        tsk->rchar += amt;
+        tsk->ioac.chr.rchar += amt;
 }
 
 static inline void add_wchar(struct task_struct *tsk, ssize_t amt)
 {
-        tsk->wchar += amt;
+        tsk->ioac.chr.wchar += amt;
 }
 
 static inline void inc_syscr(struct task_struct *tsk)
 {
-        tsk->syscr++;
+        tsk->ioac.chr.syscr++;
 }
 
 static inline void inc_syscw(struct task_struct *tsk)
 {
-        tsk->syscw++;
+        tsk->ioac.chr.syscw++;
 }
 #else
 static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
diff --git a/include/linux/task_io_accounting.h b/include/linux/task_io_accounting.h
index 44d00e9cceea..165390f8b936 100644
--- a/include/linux/task_io_accounting.h
+++ b/include/linux/task_io_accounting.h
@@ -1,5 +1,5 @@
 /*
- * task_io_accounting: a structure which is used for recording a single task's
+ * proc_io_accounting: a structure which is used for recording a single task's
  * IO statistics.
  *
  * Don't include this header file directly - it is designed to be dragged in via
@@ -8,6 +8,22 @@
  * Blame akpm@osdl.org for all this.
  */
 
+#ifdef CONFIG_TASK_XACCT
+struct task_chr_io_accounting {
+        /* bytes read */
+        u64 rchar;
+        /*  bytes written */
+        u64 wchar;
+        /* # of read syscalls */
+        u64 syscr;
+        /* # of write syscalls */
+        u64 syscw;
+};
+#else /* CONFIG_TASK_XACCT */
+struct task_chr_io_accounting {
+};
+#endif /* CONFIG_TASK_XACCT */
+
 #ifdef CONFIG_TASK_IO_ACCOUNTING
 struct task_io_accounting {
         /*
@@ -31,7 +47,12 @@ struct task_io_accounting {
          */
         u64 cancelled_write_bytes;
 };
-#else
+#else /* CONFIG_TASK_IO_ACCOUNTING */
 struct task_io_accounting {
 };
-#endif
+#endif /* CONFIG_TASK_IO_ACCOUNTING */
+
+struct proc_io_accounting {
+        struct task_chr_io_accounting chr;
+        struct task_io_accounting blk;
+};
diff --git a/include/linux/task_io_accounting_ops.h b/include/linux/task_io_accounting_ops.h
index ff46c6fad79d..e6f958ebe97f 100644
--- a/include/linux/task_io_accounting_ops.h
+++ b/include/linux/task_io_accounting_ops.h
@@ -9,7 +9,7 @@
 #ifdef CONFIG_TASK_IO_ACCOUNTING
 static inline void task_io_account_read(size_t bytes)
 {
-        current->ioac.read_bytes += bytes;
+        current->ioac.blk.read_bytes += bytes;
 }
 
 /*
@@ -18,12 +18,12 @@ static inline void task_io_account_read(size_t bytes)
  */
 static inline unsigned long task_io_get_inblock(const struct task_struct *p)
 {
-        return p->ioac.read_bytes >> 9;
+        return p->ioac.blk.read_bytes >> 9;
 }
 
 static inline void task_io_account_write(size_t bytes)
 {
-        current->ioac.write_bytes += bytes;
+        current->ioac.blk.write_bytes += bytes;
 }
 
 /*
@@ -32,17 +32,25 @@ static inline void task_io_account_write(size_t bytes)
  */
 static inline unsigned long task_io_get_oublock(const struct task_struct *p)
 {
-        return p->ioac.write_bytes >> 9;
+        return p->ioac.blk.write_bytes >> 9;
 }
 
 static inline void task_io_account_cancelled_write(size_t bytes)
 {
-        current->ioac.cancelled_write_bytes += bytes;
+        current->ioac.blk.cancelled_write_bytes += bytes;
 }
 
-static inline void task_io_accounting_init(struct task_struct *tsk)
+static inline void task_io_accounting_init(struct proc_io_accounting *ioac)
 {
-        memset(&tsk->ioac, 0, sizeof(tsk->ioac));
+        memset(ioac, 0, sizeof(*ioac));
+}
+
+static inline void task_blk_io_accounting_add(struct proc_io_accounting *dst,
+                                                struct proc_io_accounting *src)
+{
+        dst->blk.read_bytes += src->blk.read_bytes;
+        dst->blk.write_bytes += src->blk.write_bytes;
+        dst->blk.cancelled_write_bytes += src->blk.cancelled_write_bytes;
 }
 
 #else
@@ -69,9 +77,37 @@ static inline void task_io_account_cancelled_write(size_t bytes)
 {
 }
 
-static inline void task_io_accounting_init(struct task_struct *tsk)
+static inline void task_io_accounting_init(struct proc_io_accounting *ioac)
+{
+}
+
+static inline void task_blk_io_accounting_add(struct proc_io_accounting *dst,
+                                                struct proc_io_accounting *src)
 {
 }
 
-#endif          /* CONFIG_TASK_IO_ACCOUNTING */
-#endif          /* __TASK_IO_ACCOUNTING_OPS_INCLUDED */
+#endif /* CONFIG_TASK_IO_ACCOUNTING */
+
+#ifdef CONFIG_TASK_XACCT
+static inline void task_chr_io_accounting_add(struct proc_io_accounting *dst,
+                                                struct proc_io_accounting *src)
+{
+        dst->chr.rchar += src->chr.rchar;
+        dst->chr.wchar += src->chr.wchar;
+        dst->chr.syscr += src->chr.syscr;
+        dst->chr.syscw += src->chr.syscw;
+}
+#else
+static inline void task_chr_io_accounting_add(struct proc_io_accounting *dst,
+                                                struct proc_io_accounting *src)
+{
+}
+#endif /* CONFIG_TASK_XACCT */
+
+static inline void task_io_accounting_add(struct proc_io_accounting *dst,
+                                                struct proc_io_accounting *src)
+{
+        task_chr_io_accounting_add(dst, src);
+        task_blk_io_accounting_add(dst, src);
+}
+#endif /* __TASK_IO_ACCOUNTING_OPS_INCLUDED */
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 2d5c18514a2d..113028fb8f66 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -608,6 +608,8 @@ extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
 extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
 extern int ipv6_sysctl_register(void);
 extern void ipv6_sysctl_unregister(void);
+extern int ipv6_static_sysctl_register(void);
+extern void ipv6_static_sysctl_unregister(void);
 #endif
 
 #endif /* __KERNEL__ */
diff --git a/include/net/route.h b/include/net/route.h
index 3140cc500854..4f0d8c14736c 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -204,6 +204,4 @@ static inline struct inet_peer *rt_get_peer(struct rtable *rt)
         return rt->peer;
 }
 
-extern ctl_table ipv4_route_table[];
-
 #endif  /* _ROUTE_H */
diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h
index 00137a7769ee..5c40cc537d4c 100644
--- a/include/scsi/scsi.h
+++ b/include/scsi/scsi.h
@@ -106,6 +106,7 @@
 #define VARIABLE_LENGTH_CMD   0x7f
 #define REPORT_LUNS           0xa0
 #define MAINTENANCE_IN        0xa3
+#define MAINTENANCE_OUT       0xa4
 #define MOVE_MEDIUM           0xa5
 #define EXCHANGE_MEDIUM       0xa6
 #define READ_12               0xa8
@@ -125,6 +126,8 @@
 #define SAI_READ_CAPACITY_16  0x10
 /* values for maintenance in */
 #define MI_REPORT_TARGET_PGS  0x0a
+/* values for maintenance out */
+#define MO_SET_TARGET_PGS     0x0a
 
 /* Values for T10/04-262r7 */
 #define ATA_16                0x85      /* 16-byte pass-thru */
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index 66c944849d6b..f9f6e793575c 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -77,6 +77,9 @@ struct scsi_cmnd {
         int allowed;
         int timeout_per_command;
 
+        unsigned char prot_op;
+        unsigned char prot_type;
+
         unsigned short cmd_len;
         enum dma_data_direction sc_data_direction;
 
@@ -87,6 +90,8 @@ struct scsi_cmnd {
 
         /* These elements define the operation we ultimately want to perform */
         struct scsi_data_buffer sdb;
+        struct scsi_data_buffer *prot_sdb;
+
         unsigned underflow;     /* Return error if less than
                                    this amount is transferred */
 
@@ -208,4 +213,85 @@ static inline int scsi_sg_copy_to_buffer(struct scsi_cmnd *cmd,
                                  buf, buflen);
 }
 
+/*
+ * The operations below are hints that tell the controller driver how
+ * to handle I/Os with DIF or similar types of protection information.
+ */
+enum scsi_prot_operations {
+        /* Normal I/O */
+        SCSI_PROT_NORMAL = 0,
+
+        /* OS-HBA: Protected, HBA-Target: Unprotected */
+        SCSI_PROT_READ_INSERT,
+        SCSI_PROT_WRITE_STRIP,
+
+        /* OS-HBA: Unprotected, HBA-Target: Protected */
+        SCSI_PROT_READ_STRIP,
+        SCSI_PROT_WRITE_INSERT,
+
+        /* OS-HBA: Protected, HBA-Target: Protected */
+        SCSI_PROT_READ_PASS,
+        SCSI_PROT_WRITE_PASS,
+
+        /* OS-HBA: Protected, HBA-Target: Protected, checksum conversion */
+        SCSI_PROT_READ_CONVERT,
+        SCSI_PROT_WRITE_CONVERT,
+};
+
+static inline void scsi_set_prot_op(struct scsi_cmnd *scmd, unsigned char op)
+{
+        scmd->prot_op = op;
+}
+
+static inline unsigned char scsi_get_prot_op(struct scsi_cmnd *scmd)
+{
+        return scmd->prot_op;
+}
+
+/*
+ * The controller usually does not know anything about the target it
+ * is communicating with.  However, when DIX is enabled the controller
+ * must be know target type so it can verify the protection
+ * information passed along with the I/O.
+ */
+enum scsi_prot_target_type {
+        SCSI_PROT_DIF_TYPE0 = 0,
+        SCSI_PROT_DIF_TYPE1,
+        SCSI_PROT_DIF_TYPE2,
+        SCSI_PROT_DIF_TYPE3,
+};
+
+static inline void scsi_set_prot_type(struct scsi_cmnd *scmd, unsigned char type)
+{
+        scmd->prot_type = type;
+}
+
+static inline unsigned char scsi_get_prot_type(struct scsi_cmnd *scmd)
+{
+        return scmd->prot_type;
+}
+
+static inline sector_t scsi_get_lba(struct scsi_cmnd *scmd)
+{
+        return scmd->request->sector;
+}
+
+static inline unsigned scsi_prot_sg_count(struct scsi_cmnd *cmd)
+{
+        return cmd->prot_sdb ? cmd->prot_sdb->table.nents : 0;
+}
+
+static inline struct scatterlist *scsi_prot_sglist(struct scsi_cmnd *cmd)
+{
+        return cmd->prot_sdb ? cmd->prot_sdb->table.sgl : NULL;
+}
+
+static inline struct scsi_data_buffer *scsi_prot(struct scsi_cmnd *cmd)
+{
+        return cmd->prot_sdb;
+}
+
+#define scsi_for_each_prot_sg(cmd, sg, nseg, __i)               \
+        for_each_sg(scsi_prot_sglist(cmd), sg, nseg, __i)
+
 #endif /* _SCSI_SCSI_CMND_H */
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 6467f78b191f..291d56a19167 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -140,7 +140,8 @@ struct scsi_device {
         unsigned fix_capacity:1;        /* READ_CAPACITY is too high by 1 */
         unsigned guess_capacity:1;      /* READ_CAPACITY might be too high by 1 */
         unsigned retry_hwerror:1;       /* Retry HARDWARE_ERROR */
-        unsigned last_sector_bug:1;     /* Always read last sector in a 1 sector read */
+        unsigned last_sector_bug:1;     /* do not use multisector accesses on
+                                           SD_LAST_BUGGY_SECTORS */
 
         DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */
         struct list_head event_list;    /* asserted events */
@@ -167,15 +168,22 @@ struct scsi_device {
         unsigned long           sdev_data[0];
 } __attribute__((aligned(sizeof(unsigned long))));
 
+struct scsi_dh_devlist {
+        char *vendor;
+        char *model;
+};
+
 struct scsi_device_handler {
         /* Used by the infrastructure */
         struct list_head list; /* list of scsi_device_handlers */
-        struct notifier_block nb;
 
         /* Filled by the hardware handler */
         struct module *module;
         const char *name;
+        const struct scsi_dh_devlist *devlist;
         int (*check_sense)(struct scsi_device *, struct scsi_sense_hdr *);
+        int (*attach)(struct scsi_device *);
+        void (*detach)(struct scsi_device *);
         int (*activate)(struct scsi_device *);
         int (*prep_fn)(struct scsi_device *, struct request *);
 };
@@ -416,6 +424,11 @@ static inline int scsi_device_enclosure(struct scsi_device *sdev)
         return sdev->inquiry[6] & (1<<6);
 }
 
+static inline int scsi_device_protection(struct scsi_device *sdev)
+{
+        return sdev->inquiry[5] & (1<<0);
+}
+
 #define MODULE_ALIAS_SCSI_DEVICE(type) \
         MODULE_ALIAS("scsi:t-" __stringify(type) "*")
 #define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x"
diff --git a/include/scsi/scsi_dh.h b/include/scsi/scsi_dh.h
index 3ad2303d1a16..33efce20c26c 100644
--- a/include/scsi/scsi_dh.h
+++ b/include/scsi/scsi_dh.h
@@ -32,6 +32,7 @@ enum {
          */
         SCSI_DH_DEV_FAILED,     /* generic device error */
         SCSI_DH_DEV_TEMP_BUSY,
+        SCSI_DH_DEV_UNSUPP,     /* device handler not supported */
         SCSI_DH_DEVICE_MAX,     /* max device blkerr definition */
 
         /*
@@ -57,6 +58,8 @@ enum {
 #if defined(CONFIG_SCSI_DH) || defined(CONFIG_SCSI_DH_MODULE)
 extern int scsi_dh_activate(struct request_queue *);
 extern int scsi_dh_handler_exist(const char *);
+extern int scsi_dh_attach(struct request_queue *, const char *);
+extern void scsi_dh_detach(struct request_queue *);
 #else
 static inline int scsi_dh_activate(struct request_queue *req)
 {
@@ -66,4 +69,12 @@ static inline int scsi_dh_handler_exist(const char *name)
 {
         return 0;
 }
+static inline int scsi_dh_attach(struct request_queue *req, const char *name)
+{
+        return SCSI_DH_NOSYS;
+}
+static inline void scsi_dh_detach(struct request_queue *q)
+{
+        return;
+}
 #endif
diff --git a/include/scsi/scsi_eh.h b/include/scsi/scsi_eh.h
index 2a9add21267d..06a8790893ef 100644
--- a/include/scsi/scsi_eh.h
+++ b/include/scsi/scsi_eh.h
@@ -74,7 +74,9 @@ struct scsi_eh_save {
         /* saved state */
         int result;
         enum dma_data_direction data_direction;
+        unsigned underflow;
         unsigned char cmd_len;
+        unsigned char prot_op;
         unsigned char *cmnd;
         struct scsi_data_buffer sdb;
         struct request *next_rq;
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index a594bac4a77d..44a55d1bf530 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -547,7 +547,7 @@ struct Scsi_Host {
         unsigned int host_failed;          /* commands that failed. */
         unsigned int host_eh_scheduled;    /* EH scheduled without command */
     
-        unsigned short host_no;  /* Used for IOCTL_GET_IDLUN, /proc/scsi et al. */
+        unsigned int host_no;  /* Used for IOCTL_GET_IDLUN, /proc/scsi et al. */
         int resetting; /* if set, it means that last_reset is a valid value */
         unsigned long last_reset;
 
@@ -636,6 +636,10 @@ struct Scsi_Host {
          */
         unsigned int max_host_blocked;
 
+        /* Protection Information */
+        unsigned int prot_capabilities;
+        unsigned char prot_guard_type;
+
         /*
          * q used for scsi_tgt msgs, async events or any other requests that
          * need to be processed in userspace
@@ -756,6 +760,86 @@ extern struct request_queue *__scsi_alloc_queue(struct Scsi_Host *shost,
 extern void scsi_free_host_dev(struct scsi_device *);
 extern struct scsi_device *scsi_get_host_dev(struct Scsi_Host *);
 
+/*
+ * DIF defines the exchange of protection information between
+ * initiator and SBC block device.
+ *
+ * DIX defines the exchange of protection information between OS and
+ * initiator.
+ */
+enum scsi_host_prot_capabilities {
+        SHOST_DIF_TYPE1_PROTECTION = 1 << 0, /* T10 DIF Type 1 */
+        SHOST_DIF_TYPE2_PROTECTION = 1 << 1, /* T10 DIF Type 2 */
+        SHOST_DIF_TYPE3_PROTECTION = 1 << 2, /* T10 DIF Type 3 */
+
+        SHOST_DIX_TYPE0_PROTECTION = 1 << 3, /* DIX between OS and HBA only */
+        SHOST_DIX_TYPE1_PROTECTION = 1 << 4, /* DIX with DIF Type 1 */
+        SHOST_DIX_TYPE2_PROTECTION = 1 << 5, /* DIX with DIF Type 2 */
+        SHOST_DIX_TYPE3_PROTECTION = 1 << 6, /* DIX with DIF Type 3 */
+};
+
+/*
+ * SCSI hosts which support the Data Integrity Extensions must
+ * indicate their capabilities by setting the prot_capabilities using
+ * this call.
+ */
+static inline void scsi_host_set_prot(struct Scsi_Host *shost, unsigned int mask)
+{
+        shost->prot_capabilities = mask;
+}
+
+static inline unsigned int scsi_host_get_prot(struct Scsi_Host *shost)
+{
+        return shost->prot_capabilities;
+}
+
+static inline unsigned int scsi_host_dif_capable(struct Scsi_Host *shost, unsigned int target_type)
+{
+        switch (target_type) {
+        case 1: return shost->prot_capabilities & SHOST_DIF_TYPE1_PROTECTION;
+        case 2: return shost->prot_capabilities & SHOST_DIF_TYPE2_PROTECTION;
+        case 3: return shost->prot_capabilities & SHOST_DIF_TYPE3_PROTECTION;
+        }
+
+        return 0;
+}
+
+static inline unsigned int scsi_host_dix_capable(struct Scsi_Host *shost, unsigned int target_type)
+{
+        switch (target_type) {
+        case 0: return shost->prot_capabilities & SHOST_DIX_TYPE0_PROTECTION;
+        case 1: return shost->prot_capabilities & SHOST_DIX_TYPE1_PROTECTION;
+        case 2: return shost->prot_capabilities & SHOST_DIX_TYPE2_PROTECTION;
+        case 3: return shost->prot_capabilities & SHOST_DIX_TYPE3_PROTECTION;
+        }
+
+        return 0;
+}
+
+/*
+ * All DIX-capable initiators must support the T10-mandated CRC
+ * checksum.  Controllers can optionally implement the IP checksum
+ * scheme which has much lower impact on system performance.  Note
+ * that the main rationale for the checksum is to match integrity
+ * metadata with data.  Detecting bit errors are a job for ECC memory
+ * and buses.
+ */
+
+enum scsi_host_guard_type {
+        SHOST_DIX_GUARD_CRC = 1 << 0,
+        SHOST_DIX_GUARD_IP  = 1 << 1,
+};
+
+static inline void scsi_host_set_guard(struct Scsi_Host *shost, unsigned char type)
+{
+        shost->prot_guard_type = type;
+}
+
+static inline unsigned char scsi_host_get_guard(struct Scsi_Host *shost)
+{
+        return shost->prot_guard_type;
+}
+
 /* legacy interfaces */
 extern struct Scsi_Host *scsi_register(struct scsi_host_template *, int);
 extern void scsi_unregister(struct Scsi_Host *);