Merge bk://linux.bkbits.net/linux-2.5

into plexity.net:/home/dsaxena/src/linux-2.5-bk

arch/x86_64/kernel/mpparse.c

@@ -44,7 +44,7 @@ int acpi_found_madt;
 int apic_version [MAX_APICS];
 unsigned char mp_bus_id_to_type [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
 int mp_bus_id_to_pci_bus [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
-cpumask_t mp_bus_to_cpumask [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = CPU_MASK_ALL };
+cpumask_t pci_bus_to_cpumask [256] = { [0 ... 255] = CPU_MASK_ALL };
 
 int mp_current_pci_id = 0;
 /* I/O APIC entries */

arch/x86_64/kernel/pci-gart.c

@@ -70,6 +70,8 @@ int iommu_fullflush = 1;
 static spinlock_t iommu_bitmap_lock = SPIN_LOCK_UNLOCKED;
 static unsigned long *iommu_gart_bitmap; /* guarded by iommu_bitmap_lock */
 
+static u32 gart_unmapped_entry; 
+
 #define GPTE_VALID    1
 #define GPTE_COHERENT 2
 #define GPTE_ENCODE(x) \
@@ -147,8 +149,6 @@ static void free_iommu(unsigned long offset, int size)
 static void flush_gart(struct pci_dev *dev)
 { 
 	unsigned long flags;
-	int bus = dev ? dev->bus->number : -1;
-	cpumask_t bus_cpumask = pcibus_to_cpumask(bus);
 	int flushed = 0;
 	int i;
 
@@ -158,8 +158,6 @@ static void flush_gart(struct pci_dev *dev)
 			u32 w;
 			if (!northbridges[i]) 
 				continue;
-			if (bus >= 0 && !(cpu_isset(i, bus_cpumask)))
-				continue;
 			pci_write_config_dword(northbridges[i], 0x9c, 
 					       northbridge_flush_word[i] | 1); 
 			/* Make sure the hardware actually executed the flush. */
@@ -169,7 +167,7 @@ static void flush_gart(struct pci_dev *dev)
 			flushed++;
 		} 
 		if (!flushed) 
-			printk("nothing to flush? %d\n", bus);
+			printk("nothing to flush?\n");
 		need_flush = 0;
 	} 
 	spin_unlock_irqrestore(&iommu_bitmap_lock, flags);
@@ -479,6 +477,11 @@ int pci_map_sg(struct pci_dev *dev, struct scatterlist *sg, int nents, int dir)
 	unsigned long pages = 0;
 	int need = 0, nextneed;
 
+#ifdef CONFIG_SWIOTLB
+	if (swiotlb)
+		return swiotlb_map_sg(&dev->dev,sg,nents,dir);
+#endif
+
 	BUG_ON(dir == PCI_DMA_NONE);
 	if (nents == 0) 
 		return 0;
@@ -562,7 +565,7 @@ void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr,
 	iommu_page = (dma_addr - iommu_bus_base)>>PAGE_SHIFT;	
 	npages = to_pages(dma_addr, size);
 	for (i = 0; i < npages; i++) { 
-		iommu_gatt_base[iommu_page + i] = 0; 
+		iommu_gatt_base[iommu_page + i] = gart_unmapped_entry; 
 		CLEAR_LEAK(iommu_page + i);
 	}
 	free_iommu(iommu_page, npages);
@@ -729,7 +732,8 @@ static int __init pci_iommu_init(void)
 	unsigned long aper_size;
 	unsigned long iommu_start;
 	struct pci_dev *dev;
-		
+	unsigned long scratch;
+	long i;
 
 #ifndef CONFIG_AGP_AMD64
 	no_agp = 1; 
@@ -766,7 +770,7 @@ static int __init pci_iommu_init(void)
 			return -1;
 		}
 	} 
-	
+
 	aper_size = info.aper_size * 1024 * 1024;	
 	iommu_size = check_iommu_size(info.aper_base, aper_size); 
 	iommu_pages = iommu_size >> PAGE_SHIFT; 
@@ -815,6 +819,19 @@ static int __init pci_iommu_init(void)
 	 */
 	clear_kernel_mapping((unsigned long)__va(iommu_bus_base), iommu_size);
 
+	/* 
+	 * Try to workaround a bug (thanks to BenH) 
+	 * Set unmapped entries to a scratch page instead of 0. 
+	 * Any prefetches that hit unmapped entries won't get an bus abort
+	 * then.
+	 */
+	scratch = get_zeroed_page(GFP_KERNEL); 
+	if (!scratch) 
+		panic("Cannot allocate iommu scratch page");
+	gart_unmapped_entry = GPTE_ENCODE(__pa(scratch));
+	for (i = EMERGENCY_PAGES; i < iommu_pages; i++) 
+		iommu_gatt_base[i] = gart_unmapped_entry;
+
 	for_all_nb(dev) {
 		u32 flag; 
 		int cpu = PCI_SLOT(dev->devfn) - 24;

drivers/net/wireless/prism54/isl_ioctl.c

@@ -1942,7 +1942,7 @@ prism54_debug_get_oid(struct net_device *ndev, struct iw_request_info *info,
 {
 	islpci_private *priv = netdev_priv(ndev);
 	struct islpci_mgmtframe *response = NULL;
-	int ret = -EIO, response_op = PIMFOR_OP_ERROR;
+	int ret = -EIO;
 
 	printk("%s: get_oid 0x%08X\n", ndev->name, priv->priv_oid);
 	data->length = 0;
@@ -1952,9 +1952,7 @@ prism54_debug_get_oid(struct net_device *ndev, struct iw_request_info *info,
 		    islpci_mgt_transaction(priv->ndev, PIMFOR_OP_GET,
 					   priv->priv_oid, extra, 256,
 					   &response);
-		response_op = response->header->operation;
 		printk("%s: ret: %i\n", ndev->name, ret);
-		printk("%s: response_op: %i\n", ndev->name, response_op);
 		if (ret || !response
 		    || response->header->operation == PIMFOR_OP_ERROR) {
 			if (response) {
@@ -1991,16 +1989,20 @@ prism54_debug_set_oid(struct net_device *ndev, struct iw_request_info *info,
 					   priv->priv_oid, extra, data->length,
 					   &response);
 		printk("%s: ret: %i\n", ndev->name, ret);
+		if (ret || !response
+		    || response->header->operation == PIMFOR_OP_ERROR) {
+			if (response) {
+				islpci_mgt_release(response);
+			}
+			printk("%s: EIO\n", ndev->name);
+			ret = -EIO;
+		}
 		if (!ret) {
 			response_op = response->header->operation;
 			printk("%s: response_op: %i\n", ndev->name,
 			       response_op);
 			islpci_mgt_release(response);
 		}
-		if (ret || response_op == PIMFOR_OP_ERROR) {
-			printk("%s: EIO\n", ndev->name);
-			ret = -EIO;
-		}
 	}
 
 	return (ret ? ret : -EINPROGRESS);

drivers/net/wireless/prism54/islpci_hotplug.c

@@ -36,6 +36,9 @@ MODULE_AUTHOR("[Intersil] R.Bastings and W.Termorshuizen, The prism54.org Develo
 MODULE_DESCRIPTION("The Prism54 802.11 Wireless LAN adapter");
 MODULE_LICENSE("GPL");
 
+static int	init_pcitm = 0;
+module_param(init_pcitm, int, 0);
+
 /* In this order: vendor, device, subvendor, subdevice, class, class_mask,
  * driver_data 
  * If you have an update for this please contact prism54-devel@prism54.org 
@@ -292,14 +295,14 @@ prism54_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	 *
 	 * 	Writing zero to both these two registers will disable both timeouts and
 	 * 	*can* solve problems caused by devices that are slow to respond.
+	 *	Make this configurable - MSW
 	 */
-	/*	I am taking these out, we should not be poking around in the
-	 *	programmable timers - MSW
-	*/
-/*	Do not zero the programmable timers
-	pci_write_config_byte(pdev, 0x40, 0);
-	pci_write_config_byte(pdev, 0x41, 0);
-*/
+	if ( init_pcitm >= 0 ) {
+		pci_write_config_byte(pdev, 0x40, (u8)init_pcitm);
+		pci_write_config_byte(pdev, 0x41, (u8)init_pcitm);
+	} else {
+		printk(KERN_INFO "PCI TRDY/RETRY unchanged\n");
+	}
 
 	/* request the pci device I/O regions */
 	rvalue = pci_request_regions(pdev, DRV_NAME);

drivers/net/wireless/prism54/islpci_mgt.c

@@ -458,6 +458,8 @@ islpci_mgt_transaction(struct net_device *ndev,
 	int err;
 	DEFINE_WAIT(wait);
 
+	*recvframe = NULL;
+
 	if (down_interruptible(&priv->mgmt_sem))
 		return -ERESTARTSYS;
 

drivers/net/wireless/prism54/oid_mgt.c

@@ -408,7 +408,7 @@ int
 mgt_set_request(islpci_private *priv, enum oid_num_t n, int extra, void *data)
 {
 	int ret = 0;
-	struct islpci_mgmtframe *response;
+	struct islpci_mgmtframe *response = NULL;
 	int response_op = PIMFOR_OP_ERROR;
 	int dlen;
 	void *cache, *_data = data;
@@ -613,14 +613,16 @@ static enum oid_num_t commit_part2[] = {
 	DOT11_OID_DEFKEYID,
 	DOT11_OID_DOT1XENABLE,
 	OID_INL_DOT11D_CONFORMANCE,
+	/* Do not initialize this - fw < 1.0.4.3 rejects it
 	OID_INL_OUTPUTPOWER,
+	*/
 };
 
 /* update the MAC addr. */
 static int
 mgt_update_addr(islpci_private *priv)
 {
-	struct islpci_mgmtframe *res;
+	struct islpci_mgmtframe *res = NULL;
 	int ret;
 
 	ret = islpci_mgt_transaction(priv->ndev, PIMFOR_OP_GET,

include/asm-x86_64/mpspec.h

@@ -166,7 +166,7 @@ enum mp_bustype {
 };
 extern unsigned char mp_bus_id_to_type [MAX_MP_BUSSES];
 extern int mp_bus_id_to_pci_bus [MAX_MP_BUSSES];
-extern cpumask_t mp_bus_to_cpumask [MAX_MP_BUSSES];
+extern cpumask_t pci_bus_to_cpumask [256];
 
 extern unsigned int boot_cpu_physical_apicid;
 extern int smp_found_config;

include/asm-x86_64/topology.h

@@ -22,9 +22,9 @@ extern cpumask_t     node_to_cpumask[];
 
 static inline cpumask_t pcibus_to_cpumask(int bus)
 {
-	cpumask_t tmp;
-	cpus_and(tmp, mp_bus_to_cpumask[bus], cpu_online_map);
-	return tmp;
+	cpumask_t res;
+	cpus_and(res,  pci_bus_to_cpumask[bus], cpu_online_map);
+	return res;
 }
 
 #define NODE_BALANCE_RATE 30	/* CHECKME */