disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/s390/cio/io_sch.h
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@@ -9,15 +9,20 @@
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 #include "css.h"
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 #include "orb.h"
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+struct io_subchannel_dma_area {
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+	struct ccw1 sense_ccw;	/* static ccw for sense command */
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+};
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+
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 struct io_subchannel_private {
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 	union orb orb;		/* operation request block */
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-	struct ccw1 sense_ccw;	/* static ccw for sense command */
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 	struct ccw_device *cdev;/* pointer to the child ccw device */
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 	struct {
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 		unsigned int suspend:1;	/* allow suspend */
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 		unsigned int prefetch:1;/* deny prefetch */
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 		unsigned int inter:1;	/* suppress intermediate interrupts */
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 	} __packed options;
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+	struct io_subchannel_dma_area *dma_area;
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+	dma_addr_t dma_area_dma;
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 } __aligned(8);
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 #define to_io_private(n) ((struct io_subchannel_private *) \
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@@ -115,6 +120,13 @@
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 #define FAKE_CMD_IRB	1
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 #define FAKE_TM_IRB	2
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+struct ccw_device_dma_area {
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+	struct senseid senseid;	/* SenseID info */
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+	struct ccw1 iccws[2];	/* ccws for SNID/SID/SPGID commands */
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+	struct irb irb;		/* device status */
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+	struct pgid pgid[8];	/* path group IDs per chpid*/
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+};
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+
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 struct ccw_device_private {
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 	struct ccw_device *cdev;
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 	struct subchannel *sch;
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@@ -156,11 +168,7 @@
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 	} __attribute__((packed)) flags;
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 	unsigned long intparm;	/* user interruption parameter */
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 	struct qdio_irq *qdio_data;
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-	struct irb irb;		/* device status */
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 	int async_kill_io_rc;
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-	struct senseid senseid;	/* SenseID info */
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-	struct pgid pgid[8];	/* path group IDs per chpid*/
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-	struct ccw1 iccws[2];	/* ccws for SNID/SID/SPGID commands */
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 	struct work_struct todo_work;
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 	enum cdev_todo todo;
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 	wait_queue_head_t wait_q;
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@@ -169,6 +177,8 @@
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 	struct list_head cmb_list;	/* list of measured devices */
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 	u64 cmb_start_time;		/* clock value of cmb reset */
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 	void *cmb_wait;			/* deferred cmb enable/disable */
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+	struct gen_pool *dma_pool;
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+	struct ccw_device_dma_area *dma_area;
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 	enum interruption_class int_class;
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 };
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