x86_64: add chip_ops and a quirk function for CalIOC2

[akpm@linux-foundation.org>: make calioc2_chip_ops static]
Signed-off-by: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 33 insertions, 4 deletions

diff --git a/arch/x86_64/kernel/pci-calgary.c b/arch/x86_64/kernel/pci-calgary.c
index 558e68aa6b05..68634f192de8 100644
--- a/arch/x86_64/kernel/pci-calgary.c
+++ b/arch/x86_64/kernel/pci-calgary.c
@@ -79,6 +79,9 @@ int use_calgary __read_mostly = 0;
 #define PHB_MEM_2_SIZE_LOW      0x02E0
 #define PHB_DOSHOLE_OFFSET      0x08E0
 
+/* CalIOC2 specific */
+#define PHB_SAVIOR_L2           0x0DB0
+
 /* PHB_CONFIG_RW */
 #define PHB_TCE_ENABLE          0x20000000
 #define PHB_SLOT_DISABLE        0x1C000000
@@ -156,12 +159,18 @@ struct calgary_bus_info {
 
 static void calgary_handle_quirks(struct iommu_table *tbl, struct pci_dev *dev);
 static void calgary_tce_cache_blast(struct iommu_table *tbl);
+static void calioc2_handle_quirks(struct iommu_table *tbl, struct pci_dev *dev);
 
 static struct cal_chipset_ops calgary_chip_ops = {
         .handle_quirks = calgary_handle_quirks,
         .tce_cache_blast = calgary_tce_cache_blast
 };
 
+static struct cal_chipset_ops calioc2_chip_ops = {
+        .handle_quirks = calioc2_handle_quirks,
+        .tce_cache_blast = NULL
+};
+
 static struct calgary_bus_info bus_info[MAX_PHB_BUS_NUM] = { { NULL, 0, 0 }, };
 
 /* enable this to stress test the chip's TCE cache */
@@ -743,7 +752,12 @@ static int __init calgary_setup_tar(struct pci_dev *dev, void __iomem *bbar)
         tbl->it_base = (unsigned long)bus_info[dev->bus->number].tce_space;
         tce_free(tbl, 0, tbl->it_size);
 
-        tbl->chip_ops = &calgary_chip_ops;
+        if (is_calgary(dev->device))
+                tbl->chip_ops = &calgary_chip_ops;
+        else if (is_calioc2(dev->device))
+                tbl->chip_ops = &calioc2_chip_ops;
+        else
+                BUG();
 
         calgary_reserve_regions(dev);
 
@@ -894,8 +908,23 @@ static void __init calgary_set_split_completion_timeout(void __iomem *bbar,
         readq(target); /* flush */
 }
 
-static void __init calgary_handle_quirks(struct iommu_table *tbl,
-        struct pci_dev *dev)
+static void calioc2_handle_quirks(struct iommu_table *tbl, struct pci_dev *dev)
+{
+        unsigned char busnum = dev->bus->number;
+        void __iomem *bbar = tbl->bbar;
+        void __iomem *target;
+        u32 val;
+
+        /*
+         * CalIOC2 designers recommend setting bit 8 in 0xnDB0 to 1
+         */
+        target = calgary_reg(bbar, phb_offset(busnum) | PHB_SAVIOR_L2);
+        val = cpu_to_be32(readl(target));
+        val |= 0x00800000;
+        writel(cpu_to_be32(val), target);
+}
+
+static void calgary_handle_quirks(struct iommu_table *tbl, struct pci_dev *dev)
 {
         unsigned char busnum = dev->bus->number;
 
@@ -903,7 +932,7 @@ static void __init calgary_handle_quirks(struct iommu_table *tbl,
          * Give split completion a longer timeout on bus 1 for aic94xx
          * http://bugzilla.kernel.org/show_bug.cgi?id=7180
          */
-        if (busnum == 1)
+        if (is_calgary(dev->device) && (busnum == 1))
                 calgary_set_split_completion_timeout(tbl->bbar, busnum,
                                                      CCR_2SEC_TIMEOUT);
 }