powerpc/eeh: pseries platform PE state retrieval

On pSeries platform, there're 2 dedicated RTAS calls introduced to
retrieve the corresponding PE's state: ibm,read-slot-reset-state and
ibm,read-slot-reset-state2.

The patch implements the retrieval of PE's state according to the
given PE address. Besides, the implementation has been abstracted by
struct eeh_ops::get_state so that EEH core components could support
multiple platforms in future.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h
index 76f7b3f739c5..1d3c9e5fa089 100644
--- a/arch/powerpc/include/asm/eeh.h
+++ b/arch/powerpc/include/asm/eeh.h
@@ -42,6 +42,14 @@ struct device_node;
 #define EEH_OPT_ENABLE          1       /* EEH enable   */
 #define EEH_OPT_THAW_MMIO       2       /* MMIO enable  */
 #define EEH_OPT_THAW_DMA        3       /* DMA enable   */
+#define EEH_STATE_UNAVAILABLE   (1 << 0)        /* State unavailable    */
+#define EEH_STATE_NOT_SUPPORT   (1 << 1)        /* EEH not supported    */
+#define EEH_STATE_RESET_ACTIVE  (1 << 2)        /* Active reset         */
+#define EEH_STATE_MMIO_ACTIVE   (1 << 3)        /* Active MMIO          */
+#define EEH_STATE_DMA_ACTIVE    (1 << 4)        /* Active DMA           */
+#define EEH_STATE_MMIO_ENABLED  (1 << 5)        /* MMIO enabled         */
+#define EEH_STATE_DMA_ENABLED   (1 << 6)        /* DMA enabled          */
+
 struct eeh_ops {
         char *name;
         int (*init)(void);