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authorDavid S. Miller <davem@sunset.davemloft.net>2007-05-15 17:03:54 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-05-15 20:23:02 -0700
commitc7754d465b1feade85b5f1c4492781a30f6652a2 (patch)
tree9a3b6ccb18983c1ea389377028ca51c8170730ef /include
parent7b104bcb8e460e45a1aebe3da9b86aacdb4cab12 (diff)
[SPARC64]: Add hypervisor API negotiation and fix console bugs.
Hypervisor interfaces need to be negotiated in order to use some API calls reliably. So add a small set of interfaces to request API versions and query current settings. This allows us to fix some bugs in the hypervisor console: 1) If we can negotiate API group CORE of at least major 1 minor 1 we can use con_read and con_write which can improve console performance quite a bit. 2) When we do a console write request, we should hold the spinlock around the whole request, not a byte at a time. What would happen is that it's easy for output from different cpus to get mixed with each other. 3) Use consistent udelay() based polling, udelay(1) each loop with a limit of 1000 polls to handle stuck hypervisor console. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/asm-sparc64/hypervisor.h83
1 files changed, 82 insertions, 1 deletions
diff --git a/include/asm-sparc64/hypervisor.h b/include/asm-sparc64/hypervisor.h
index 612bf319753f..a5558c87556d 100644
--- a/include/asm-sparc64/hypervisor.h
+++ b/include/asm-sparc64/hypervisor.h
@@ -940,6 +940,54 @@ struct hv_fault_status {
*/
#define HV_FAST_CONS_PUTCHAR 0x61
+/* con_read()
+ * TRAP: HV_FAST_TRAP
+ * FUNCTION: HV_FAST_CONS_READ
+ * ARG0: buffer real address
+ * ARG1: buffer size in bytes
+ * RET0: status
+ * RET1: bytes read or BREAK or HUP
+ * ERRORS: EWOULDBLOCK No character available.
+ *
+ * Reads characters into a buffer from the console device. If no
+ * character is available then an EWOULDBLOCK error is returned.
+ * If a character is available, then the returned status is EOK
+ * and the number of bytes read into the given buffer is provided
+ * in RET1.
+ *
+ * A virtual BREAK is represented by the 64-bit RET1 value -1.
+ *
+ * A virtual HUP signal is represented by the 64-bit RET1 value -2.
+ *
+ * If BREAK or HUP are indicated, no bytes were read into buffer.
+ */
+#define HV_FAST_CONS_READ 0x62
+
+/* con_write()
+ * TRAP: HV_FAST_TRAP
+ * FUNCTION: HV_FAST_CONS_WRITE
+ * ARG0: buffer real address
+ * ARG1: buffer size in bytes
+ * RET0: status
+ * RET1: bytes written
+ * ERRORS: EWOULDBLOCK Output buffer currently full, would block
+ *
+ * Send a characters in buffer to the console device. Breaks must be
+ * sent using con_putchar().
+ */
+#define HV_FAST_CONS_WRITE 0x63
+
+#ifndef __ASSEMBLY__
+extern long sun4v_con_getchar(long *status);
+extern long sun4v_con_putchar(long c);
+extern long sun4v_con_read(unsigned long buffer,
+ unsigned long size,
+ unsigned long *bytes_read);
+extern unsigned long sun4v_con_write(unsigned long buffer,
+ unsigned long size,
+ unsigned long *bytes_written);
+#endif
+
/* Trap trace services.
*
* The hypervisor provides a trap tracing capability for privileged
@@ -2121,8 +2169,41 @@ struct hv_mmu_statistics {
#define HV_FAST_MMUSTAT_INFO 0x103
/* Function numbers for HV_CORE_TRAP. */
-#define HV_CORE_VER 0x00
+#define HV_CORE_SET_VER 0x00
#define HV_CORE_PUTCHAR 0x01
#define HV_CORE_EXIT 0x02
+#define HV_CORE_GET_VER 0x03
+
+/* Hypervisor API groups for use with HV_CORE_SET_VER and
+ * HV_CORE_GET_VER.
+ */
+#define HV_GRP_SUN4V 0x0000
+#define HV_GRP_CORE 0x0001
+#define HV_GRP_INTR 0x0002
+#define HV_GRP_SOFT_STATE 0x0003
+#define HV_GRP_PCI 0x0100
+#define HV_GRP_LDOM 0x0101
+#define HV_GRP_SVC_CHAN 0x0102
+#define HV_GRP_NCS 0x0103
+#define HV_GRP_NIAG_PERF 0x0200
+#define HV_GRP_FIRE_PERF 0x0201
+#define HV_GRP_DIAG 0x0300
+
+#ifndef __ASSEMBLY__
+extern unsigned long sun4v_get_version(unsigned long group,
+ unsigned long *major,
+ unsigned long *minor);
+extern unsigned long sun4v_set_version(unsigned long group,
+ unsigned long major,
+ unsigned long minor,
+ unsigned long *actual_minor);
+
+extern int sun4v_hvapi_register(unsigned long group, unsigned long major,
+ unsigned long *minor);
+extern void sun4v_hvapi_unregister(unsigned long group);
+extern int sun4v_hvapi_get(unsigned long group,
+ unsigned long *major,
+ unsigned long *minor);
+#endif
#endif /* !(_SPARC64_HYPERVISOR_H) */