[PATCH 2/3] vme: include address space in error filtering

[Dmitry Kalinkin]

Also changes vme_bus_error_handler to take generic address modifier code
instead of raw contents of a device-specific attribute register.

Signed-off-by: Dmitry Kalinkin <dmitry.kalinkin@xxxxxxxxx>
Cc: Igor Alekseev <igor.alekseev@xxxxxxx>
---
 drivers/vme/bridges/vme_tsi148.c |  4 ++-
 drivers/vme/vme.c                | 61 +++++++++++++++++++++++++++-------------
 drivers/vme/vme_bridge.h         |  4 +--
 3 files changed, 46 insertions(+), 23 deletions(-)

diff --git a/drivers/vme/bridges/vme_tsi148.c b/drivers/vme/bridges/vme_tsi148.c
index c1f9385..76ccfae 100644
--- a/drivers/vme/bridges/vme_tsi148.c
+++ b/drivers/vme/bridges/vme_tsi148.c
@@ -169,6 +169,7 @@ static u32 tsi148_VERR_irqhandler(struct vme_bridge *tsi148_bridge)
 	unsigned int error_addr_high, error_addr_low;
 	unsigned long long error_addr;
 	u32 error_attrib;
+	int error_am;
 	struct tsi148_driver *bridge;
 
 	bridge = tsi148_bridge->driver_priv;
@@ -176,6 +177,7 @@ static u32 tsi148_VERR_irqhandler(struct vme_bridge *tsi148_bridge)
 	error_addr_high = ioread32be(bridge->base + TSI148_LCSR_VEAU);
 	error_addr_low = ioread32be(bridge->base + TSI148_LCSR_VEAL);
 	error_attrib = ioread32be(bridge->base + TSI148_LCSR_VEAT);
+	error_am = (error_attrib & TSI148_LCSR_VEAT_AM_M) >> 8;
 
 	reg_join(error_addr_high, error_addr_low, &error_addr);
 
@@ -186,7 +188,7 @@ static u32 tsi148_VERR_irqhandler(struct vme_bridge *tsi148_bridge)
 	}
 
 	if (err_chk)
-		vme_bus_error_handler(tsi148_bridge, error_addr, error_attrib);
+		vme_bus_error_handler(tsi148_bridge, error_addr, error_am);
 	else
 		dev_err(tsi148_bridge->parent,
 			"VME Bus Error at address: 0x%llx, attributes: %08x\n",
diff --git a/drivers/vme/vme.c b/drivers/vme/vme.c
index 6803744..2b79cd2 100644
--- a/drivers/vme/vme.c
+++ b/drivers/vme/vme.c
@@ -223,6 +223,39 @@ int vme_check_window(u32 aspace, unsigned long long vme_base,
 }
 EXPORT_SYMBOL(vme_check_window);
 
+static u32 vme_get_aspace(int am)
+{
+	switch (am) {
+	case 0x29:
+	case 0x2D:
+		return VME_A16;
+	case 0x38:
+	case 0x39:
+	case 0x3A:
+	case 0x3B:
+	case 0x3C:
+	case 0x3D:
+	case 0x3E:
+	case 0x3F:
+		return VME_A24;
+	case 0x8:
+	case 0x9:
+	case 0xA:
+	case 0xB:
+	case 0xC:
+	case 0xD:
+	case 0xE:
+	case 0xF:
+		return VME_A32;
+	case 0x0:
+	case 0x1:
+	case 0x3:
+		return VME_A64;
+	}
+
+	return 0;
+}
+
 /*
  * Request a slave image with specific attributes, return some unique
  * identifier.
@@ -991,14 +1024,14 @@ int vme_dma_free(struct vme_resource *resource)
 EXPORT_SYMBOL(vme_dma_free);
 
 void vme_bus_error_handler(struct vme_bridge *bridge,
-			   unsigned long long address, u32 attributes)
+			   unsigned long long address, int am)
 {
 	struct vme_bus_error *error;
 
 	error = kmalloc(sizeof(struct vme_bus_error), GFP_ATOMIC);
 	if (error) {
+		error->aspace = vme_get_aspace(am);
 		error->address = address;
-		error->attributes = attributes;
 		list_add_tail(&error->list, &bridge->vme_errors);
 	} else {
 		dev_err(bridge->parent,
@@ -1019,19 +1052,13 @@ struct vme_bus_error *vme_find_error(struct vme_bridge *bridge, u32 aspace,
 
 	bound = address + count;
 
-	/*
-	 * XXX We are currently not looking at the address space when parsing
-	 *     for errors. This is because parsing the Address Modifier Codes
-	 *     is going to be quite resource intensive to do properly. We
-	 *     should be OK just looking at the addresses and this is certainly
-	 *     much better than what we had before.
-	 */
 	err_pos = NULL;
 	/* Iterate through errors */
 	list_for_each(err_pos, &bridge->vme_errors) {
 		vme_err = list_entry(err_pos, struct vme_bus_error, list);
-		if ((vme_err->address >= address) &&
-			(vme_err->address < bound)) {
+		if ((vme_err->aspace == aspace) &&
+		    (vme_err->address >= address) &&
+		    (vme_err->address < bound)) {
 
 			valid = vme_err;
 			break;
@@ -1054,20 +1081,14 @@ void vme_clear_errors(struct vme_bridge *bridge, u32 aspace,
 
 	bound = address + count;
 
-	/*
-	 * XXX We are currently not looking at the address space when parsing
-	 *     for errors. This is because parsing the Address Modifier Codes
-	 *     is going to be quite resource intensive to do properly. We
-	 *     should be OK just looking at the addresses and this is certainly
-	 *     much better than what we had before.
-	 */
 	err_pos = NULL;
 	/* Iterate through errors */
 	list_for_each_safe(err_pos, temp, &bridge->vme_errors) {
 		vme_err = list_entry(err_pos, struct vme_bus_error, list);
 
-		if ((vme_err->address >= address) &&
-			(vme_err->address < bound)) {
+		if ((vme_err->aspace == aspace) &&
+		    (vme_err->address >= address) &&
+		    (vme_err->address < bound)) {
 
 			list_del(err_pos);
 			kfree(vme_err);
diff --git a/drivers/vme/vme_bridge.h b/drivers/vme/vme_bridge.h
index d8d6b14..92fbe18 100644
--- a/drivers/vme/vme_bridge.h
+++ b/drivers/vme/vme_bridge.h
@@ -77,8 +77,8 @@ struct vme_lm_resource {
 
 struct vme_bus_error {
 	struct list_head list;
+	u32 aspace;
 	unsigned long long address;
-	u32 attributes;
 };
 
 struct vme_callback {
@@ -167,7 +167,7 @@ struct vme_bridge {
 };
 
 void vme_bus_error_handler(struct vme_bridge *bridge,
-			   unsigned long long address, u32 attributes);
+			   unsigned long long address, int am);
 struct vme_bus_error *vme_find_error(struct vme_bridge *bridge, u32 aspace,
 				     unsigned long long address, size_t count);
 void vme_clear_errors(struct vme_bridge *bridge, u32 aspace,
-- 
1.8.3.1

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