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-rw-r--r--arch/s390/include/asm/cio.h41
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/s390/include/asm/cio.h b/arch/s390/include/asm/cio.h
index 1727180e8ca1..b5bfb3123cb1 100644
--- a/arch/s390/include/asm/cio.h
+++ b/arch/s390/include/asm/cio.h
@@ -7,6 +7,7 @@
#include <linux/spinlock.h>
#include <linux/bitops.h>
+#include <linux/genalloc.h>
#include <asm/types.h>
#define LPM_ANYPATH 0xff
@@ -264,6 +265,36 @@ struct ciw {
#define CIW_TYPE_RNI 0x2 /* read node identifier */
/*
+ * Node Descriptor as defined in SA22-7204, "Common I/O-Device Commands"
+ */
+
+#define ND_VALIDITY_VALID 0
+#define ND_VALIDITY_OUTDATED 1
+#define ND_VALIDITY_INVALID 2
+
+struct node_descriptor {
+ /* Flags. */
+ union {
+ struct {
+ u32 validity:3;
+ u32 reserved:5;
+ } __packed;
+ u8 byte0;
+ } __packed;
+
+ /* Node parameters. */
+ u32 params:24;
+
+ /* Node ID. */
+ char type[6];
+ char model[3];
+ char manufacturer[3];
+ char plant[2];
+ char seq[12];
+ u16 tag;
+} __packed;
+
+/*
* Flags used as input parameters for do_IO()
*/
#define DOIO_ALLOW_SUSPEND 0x0001 /* allow for channel prog. suspend */
@@ -328,6 +359,16 @@ static inline u8 pathmask_to_pos(u8 mask)
void channel_subsystem_reinit(void);
extern void css_schedule_reprobe(void);
+extern void *cio_dma_zalloc(size_t size);
+extern void cio_dma_free(void *cpu_addr, size_t size);
+extern struct device *cio_get_dma_css_dev(void);
+
+void *cio_gp_dma_zalloc(struct gen_pool *gp_dma, struct device *dma_dev,
+ size_t size);
+void cio_gp_dma_free(struct gen_pool *gp_dma, void *cpu_addr, size_t size);
+void cio_gp_dma_destroy(struct gen_pool *gp_dma, struct device *dma_dev);
+struct gen_pool *cio_gp_dma_create(struct device *dma_dev, int nr_pages);
+
/* Function from drivers/s390/cio/chsc.c */
int chsc_sstpc(void *page, unsigned int op, u16 ctrl, u64 *clock_delta);
int chsc_sstpi(void *page, void *result, size_t size);