sgi-xp: add usage of GRU driver by xpc_remote_memcpy()

Add UV support to xpc_remote_memcpy(), which involves interfacing to the
GRU driver.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/misc/sgi-xp/xp.h

@@ -207,7 +207,9 @@ enum xp_retval {
 	xpUnsupported,		/* 56: unsupported functionality or resource */
 	xpNeedMoreInfo,		/* 57: more info is needed by SAL */
 
-	xpUnknownReason		/* 58: unknown reason - must be last in enum */
+	xpGruCopyError,		/* 58: gru_copy_gru() returned error */
+
+	xpUnknownReason		/* 59: unknown reason - must be last in enum */
 };
 
 /*
@@ -349,7 +351,9 @@ extern short xp_max_npartitions;
 extern short xp_partition_id;
 extern u8 xp_region_size;
 
-extern enum xp_retval (*xp_remote_memcpy) (void *, const void *, size_t);
+extern unsigned long (*xp_pa) (void *);
+extern enum xp_retval (*xp_remote_memcpy) (unsigned long, const unsigned long,
+		       size_t);
 extern int (*xp_cpu_to_nasid) (int);
 
 extern u64 xp_nofault_PIOR_target;

drivers/misc/sgi-xp/xp_main.c

@@ -41,7 +41,11 @@ EXPORT_SYMBOL_GPL(xp_partition_id);
 u8 xp_region_size;
 EXPORT_SYMBOL_GPL(xp_region_size);
 
-enum xp_retval (*xp_remote_memcpy) (void *dst, const void *src, size_t len);
+unsigned long (*xp_pa) (void *addr);
+EXPORT_SYMBOL_GPL(xp_pa);
+
+enum xp_retval (*xp_remote_memcpy) (unsigned long dst_gpa,
+				    const unsigned long src_gpa, size_t len);
 EXPORT_SYMBOL_GPL(xp_remote_memcpy);
 
 int (*xp_cpu_to_nasid) (int cpuid);

drivers/misc/sgi-xp/xp_sn2.c

@@ -63,7 +63,7 @@ xp_register_nofault_code_sn2(void)
 	return xpSuccess;
 }
 
-void
+static void
 xp_unregister_nofault_code_sn2(void)
 {
 	u64 func_addr = *(u64 *)xp_nofault_PIOR;
@@ -74,45 +74,42 @@ xp_unregister_nofault_code_sn2(void)
 				       err_func_addr, 1, 0);
 }
 
+/*
+ * Convert a virtual memory address to a physical memory address.
+ */
+static unsigned long
+xp_pa_sn2(void *addr)
+{
+	return __pa(addr);
+}
+
 /*
  * Wrapper for bte_copy().
  *
- *	vdst - virtual address of the destination of the transfer.
- *	psrc - physical address of the source of the transfer.
+ *	dst_pa - physical address of the destination of the transfer.
+ *	src_pa - physical address of the source of the transfer.
  *	len - number of bytes to transfer from source to destination.
  *
  * Note: xp_remote_memcpy_sn2() should never be called while holding a spinlock.
  */
 static enum xp_retval
-xp_remote_memcpy_sn2(void *vdst, const void *psrc, size_t len)
+xp_remote_memcpy_sn2(unsigned long dst_pa, const unsigned long src_pa,
+		     size_t len)
 {
 	bte_result_t ret;
-	u64 pdst = ia64_tpa(vdst);
-	/* ??? What are the rules governing the src and dst addresses passed in?
-	 * ??? Currently we're assuming that dst is a virtual address and src
-	 * ??? is a physical address, is this appropriate? Can we allow them to
-	 * ??? be whatever and we make the change here without damaging the
-	 * ??? addresses?
-	 */
 
-	/*
-	 * Ensure that the physically mapped memory is contiguous.
-	 *
-	 * We do this by ensuring that the memory is from region 7 only.
-	 * If the need should arise to use memory from one of the other
-	 * regions, then modify the BUG_ON() statement to ensure that the
-	 * memory from that region is always physically contiguous.
-	 */
-	BUG_ON(REGION_NUMBER(vdst) != RGN_KERNEL);
-
-	ret = bte_copy((u64)psrc, pdst, len, (BTE_NOTIFY | BTE_WACQUIRE), NULL);
+	ret = bte_copy(src_pa, dst_pa, len, (BTE_NOTIFY | BTE_WACQUIRE), NULL);
 	if (ret == BTE_SUCCESS)
 		return xpSuccess;
 
-	if (is_shub2())
-		dev_err(xp, "bte_copy() on shub2 failed, error=0x%x\n", ret);
-	else
-		dev_err(xp, "bte_copy() failed, error=%d\n", ret);
+	if (is_shub2()) {
+		dev_err(xp, "bte_copy() on shub2 failed, error=0x%x dst_pa="
+			"0x%016lx src_pa=0x%016lx len=%ld\\n", ret, dst_pa,
+			src_pa, len);
+	} else {
+		dev_err(xp, "bte_copy() failed, error=%d dst_pa=0x%016lx "
+			"src_pa=0x%016lx len=%ld\\n", ret, dst_pa, src_pa, len);
+	}
 
 	return xpBteCopyError;
 }
@@ -132,6 +129,7 @@ xp_init_sn2(void)
 	xp_partition_id = sn_partition_id;
 	xp_region_size = sn_region_size;
 
+	xp_pa = xp_pa_sn2;
 	xp_remote_memcpy = xp_remote_memcpy_sn2;
 	xp_cpu_to_nasid = xp_cpu_to_nasid_sn2;
 

drivers/misc/sgi-xp/xp_uv.c

@@ -13,13 +13,33 @@
  *
  */
 
+#include <linux/device.h>
+#include <asm/uv/uv_hub.h>
+#include "../sgi-gru/grukservices.h"
 #include "xp.h"
 
+/*
+ * Convert a virtual memory address to a physical memory address.
+ */
+static unsigned long
+xp_pa_uv(void *addr)
+{
+	return uv_gpa(addr);
+}
+
 static enum xp_retval
-xp_remote_memcpy_uv(void *vdst, const void *psrc, size_t len)
+xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa,
+		    size_t len)
 {
-	/* !!! this function needs fleshing out */
-	return xpUnsupported;
+	int ret;
+
+	ret = gru_copy_gpa(dst_gpa, src_gpa, len);
+	if (ret == 0)
+		return xpSuccess;
+
+	dev_err(xp, "gru_copy_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx "
+		"len=%ld\n", dst_gpa, src_gpa, len);
+	return xpGruCopyError;
 }
 
 enum xp_retval
@@ -29,6 +49,7 @@ xp_init_uv(void)
 
 	xp_max_npartitions = XP_MAX_NPARTITIONS_UV;
 
+	xp_pa = xp_pa_uv;
 	xp_remote_memcpy = xp_remote_memcpy_uv;
 
 	return xpSuccess;

drivers/misc/sgi-xp/xpc.h

@@ -91,8 +91,8 @@ struct xpc_rsvd_page {
 	u8 version;
 	u8 pad1[3];		/* align to next u64 in 1st 64-byte cacheline */
 	union {
-		u64 vars_pa;	/* physical address of struct xpc_vars */
-		u64 activate_mq_gpa;	/* global phys address of activate_mq */
+		unsigned long vars_pa;	/* phys address of struct xpc_vars */
+		unsigned long activate_mq_gpa; /* gru phy addr of activate_mq */
 	} sn;
 	unsigned long ts_jiffies; /* timestamp when rsvd pg was setup by XPC */
 	u64 pad2[10];		/* align to last u64 in 2nd 64-byte cacheline */
@@ -122,8 +122,8 @@ struct xpc_vars_sn2 {
 	u64 heartbeat_offline;	/* if 0, heartbeat should be changing */
 	int activate_IRQ_nasid;
 	int activate_IRQ_phys_cpuid;
-	u64 vars_part_pa;
-	u64 amos_page_pa;	/* paddr of page of amos from MSPEC driver */
+	unsigned long vars_part_pa;
+	unsigned long amos_page_pa;/* paddr of page of amos from MSPEC driver */
 	struct amo *amos_page;	/* vaddr of page of amos from MSPEC driver */
 };
 
@@ -142,10 +142,10 @@ struct xpc_vars_sn2 {
 struct xpc_vars_part_sn2 {
 	u64 magic;
 
-	u64 openclose_args_pa;	/* physical address of open and close args */
-	u64 GPs_pa;		/* physical address of Get/Put values */
+	unsigned long openclose_args_pa; /* phys addr of open and close args */
+	unsigned long GPs_pa;	/* physical address of Get/Put values */
 
-	u64 chctl_amo_pa;	/* physical address of chctl flags' amo */
+	unsigned long chctl_amo_pa; /* physical address of chctl flags' amo */
 
 	int notify_IRQ_nasid;	/* nasid of where to send notify IRQs */
 	int notify_IRQ_phys_cpuid;	/* CPUID of where to send notify IRQs */
@@ -213,7 +213,7 @@ struct xpc_openclose_args {
 	u16 msg_size;		/* sizeof each message entry */
 	u16 remote_nentries;	/* #of message entries in remote msg queue */
 	u16 local_nentries;	/* #of message entries in local msg queue */
-	u64 local_msgqueue_pa;	/* physical address of local message queue */
+	unsigned long local_msgqueue_pa; /* phys addr of local message queue */
 };
 
 #define XPC_OPENCLOSE_ARGS_SIZE \
@@ -366,8 +366,8 @@ struct xpc_channel {
 	void *remote_msgqueue_base;	/* base address of kmalloc'd space */
 	struct xpc_msg *remote_msgqueue; /* cached copy of remote partition's */
 					 /* local message queue */
-	u64 remote_msgqueue_pa;	/* phys addr of remote partition's */
-				/* local message queue */
+	unsigned long remote_msgqueue_pa; /* phys addr of remote partition's */
+					  /* local message queue */
 
 	atomic_t references;	/* #of external references to queues */
 
@@ -491,23 +491,23 @@ xpc_any_msg_chctl_flags_set(union xpc_channel_ctl_flags *chctl)
  */
 
 struct xpc_partition_sn2 {
-	u64 remote_amos_page_pa;	/* phys addr of partition's amos page */
+	unsigned long remote_amos_page_pa; /* paddr of partition's amos page */
 	int activate_IRQ_nasid;	/* active partition's act/deact nasid */
 	int activate_IRQ_phys_cpuid;	/* active part's act/deact phys cpuid */
 
-	u64 remote_vars_pa;	/* phys addr of partition's vars */
-	u64 remote_vars_part_pa;	/* phys addr of partition's vars part */
+	unsigned long remote_vars_pa;	/* phys addr of partition's vars */
+	unsigned long remote_vars_part_pa; /* paddr of partition's vars part */
 	u8 remote_vars_version;	/* version# of partition's vars */
 
 	void *local_GPs_base;	/* base address of kmalloc'd space */
 	struct xpc_gp_sn2 *local_GPs;	/* local Get/Put values */
 	void *remote_GPs_base;	/* base address of kmalloc'd space */
 	struct xpc_gp_sn2 *remote_GPs;	/* copy of remote partition's local */
 					/* Get/Put values */
-	u64 remote_GPs_pa;	/* phys address of remote partition's local */
-				/* Get/Put values */
+	unsigned long remote_GPs_pa; /* phys addr of remote partition's local */
+				     /* Get/Put values */
 
-	u64 remote_openclose_args_pa;	/* phys addr of remote's args */
+	unsigned long remote_openclose_args_pa;	/* phys addr of remote's args */
 
 	int notify_IRQ_nasid;	/* nasid of where to send notify IRQs */
 	int notify_IRQ_phys_cpuid;	/* CPUID of where to send notify IRQs */
@@ -529,7 +529,7 @@ struct xpc_partition {
 
 	u8 remote_rp_version;	/* version# of partition's rsvd pg */
 	unsigned long remote_rp_ts_jiffies; /* timestamp when rsvd pg setup */
-	u64 remote_rp_pa;	/* phys addr of partition's rsvd pg */
+	unsigned long remote_rp_pa;	/* phys addr of partition's rsvd pg */
 	u64 last_heartbeat;	/* HB at last read */
 	u32 activate_IRQ_rcvd;	/* IRQs since activation */
 	spinlock_t act_lock;	/* protect updating of act_state */
@@ -623,7 +623,8 @@ extern void xpc_activate_partition(struct xpc_partition *);
 extern void xpc_activate_kthreads(struct xpc_channel *, int);
 extern void xpc_create_kthreads(struct xpc_channel *, int, int);
 extern void xpc_disconnect_wait(int);
-extern enum xp_retval (*xpc_get_partition_rsvd_page_pa) (u64, u64 *, u64 *,
+extern enum xp_retval (*xpc_get_partition_rsvd_page_pa) (void *, u64 *,
+							 unsigned long *,
 							 size_t *);
 extern enum xp_retval (*xpc_rsvd_page_init) (struct xpc_rsvd_page *);
 extern void (*xpc_heartbeat_init) (void);
@@ -640,8 +641,8 @@ extern void (*xpc_notify_senders_of_disconnect) (struct xpc_channel *);
 extern void (*xpc_process_msg_chctl_flags) (struct xpc_partition *, int);
 extern int (*xpc_n_of_deliverable_msgs) (struct xpc_channel *);
 extern struct xpc_msg *(*xpc_get_deliverable_msg) (struct xpc_channel *);
-extern void (*xpc_request_partition_activation) (struct xpc_rsvd_page *, u64,
-						 int);
+extern void (*xpc_request_partition_activation) (struct xpc_rsvd_page *,
+						 unsigned long, int);
 extern void (*xpc_request_partition_reactivation) (struct xpc_partition *);
 extern void (*xpc_request_partition_deactivation) (struct xpc_partition *);
 extern void (*xpc_cancel_partition_deactivation_request) (
@@ -690,7 +691,8 @@ extern enum xp_retval xpc_mark_partition_active(struct xpc_partition *);
 extern void xpc_mark_partition_inactive(struct xpc_partition *);
 extern void xpc_discovery(void);
 extern enum xp_retval xpc_get_remote_rp(int, unsigned long *,
-					struct xpc_rsvd_page *, u64 *);
+					struct xpc_rsvd_page *,
+					unsigned long *);
 extern void xpc_deactivate_partition(const int, struct xpc_partition *,
 				     enum xp_retval);
 extern enum xp_retval xpc_initiate_partid_to_nasids(short, void *);

drivers/misc/sgi-xp/xpc_channel.c

@@ -366,9 +366,8 @@ xpc_process_openclose_chctl_flags(struct xpc_partition *part, int ch_number,
 		dev_dbg(xpc_chan, "XPC_CHCTL_OPENREPLY (local_msgqueue_pa="
 			"0x%lx, local_nentries=%d, remote_nentries=%d) "
 			"received from partid=%d, channel=%d\n",
-			(unsigned long)args->local_msgqueue_pa,
-			args->local_nentries, args->remote_nentries,
-			ch->partid, ch->number);
+			args->local_msgqueue_pa, args->local_nentries,
+			args->remote_nentries, ch->partid, ch->number);
 
 		if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED)) {
 			spin_unlock_irqrestore(&ch->lock, irq_flags);

drivers/misc/sgi-xp/xpc_main.c

@@ -169,8 +169,9 @@ static struct notifier_block xpc_die_notifier = {
 	.notifier_call = xpc_system_die,
 };
 
-enum xp_retval (*xpc_get_partition_rsvd_page_pa) (u64 buf, u64 *cookie,
-						  u64 *paddr, size_t *len);
+enum xp_retval (*xpc_get_partition_rsvd_page_pa) (void *buf, u64 *cookie,
+						  unsigned long *rp_pa,
+						  size_t *len);
 enum xp_retval (*xpc_rsvd_page_init) (struct xpc_rsvd_page *rp);
 void (*xpc_heartbeat_init) (void);
 void (*xpc_heartbeat_exit) (void);
@@ -189,7 +190,8 @@ int (*xpc_n_of_deliverable_msgs) (struct xpc_channel *ch);
 struct xpc_msg *(*xpc_get_deliverable_msg) (struct xpc_channel *ch);
 
 void (*xpc_request_partition_activation) (struct xpc_rsvd_page *remote_rp,
-					  u64 remote_rp_pa, int nasid);
+					  unsigned long remote_rp_pa,
+					  int nasid);
 void (*xpc_request_partition_reactivation) (struct xpc_partition *part);
 void (*xpc_request_partition_deactivation) (struct xpc_partition *part);
 void (*xpc_cancel_partition_deactivation_request) (struct xpc_partition *part);