RDMA/nes: Limit critical error interrupts

Mask off a critical error after 100 critical error interrupts to
keep the system "sane".

Signed-off-by: Sweta Bhatt <sweta.bhatt@einfochips.com>
Signed-off-by: Chien Tung <ctung@neteffect.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/hw/nes/nes_hw.c b/drivers/infiniband/hw/nes/nes_hw.c
index 515c071..fc45e9c 100644 (file)
--- a/drivers/infiniband/hw/nes/nes_hw.c
+++ b/drivers/infiniband/hw/nes/nes_hw.c
@@ -55,7 +55,7 @@ u32 int_mod_cq_depth_24;
 u32 int_mod_cq_depth_16;
 u32 int_mod_cq_depth_4;
 u32 int_mod_cq_depth_1;
-
+static const u8 nes_max_critical_error_count = 100;
 #include "nes_cm.h"
 
 static void nes_cqp_ce_handler(struct nes_device *nesdev, struct nes_hw_cq *cq);
@@ -67,6 +67,7 @@ static void nes_process_aeq(struct nes_device *nesdev, struct nes_hw_aeq *aeq);
 static void nes_process_ceq(struct nes_device *nesdev, struct nes_hw_ceq *ceq);
 static void nes_process_iwarp_aeqe(struct nes_device *nesdev,
                                   struct nes_hw_aeqe *aeqe);
+static void process_critical_error(struct nes_device *nesdev);
 static void nes_process_mac_intr(struct nes_device *nesdev, u32 mac_number);
 static unsigned int nes_reset_adapter_ne020(struct nes_device *nesdev, u8 *OneG_Mode);
 
@@ -1352,7 +1353,7 @@ int nes_init_phy(struct nes_device *nesdev)
                                nes_write_10G_phy_reg(nesdev, nesadapter->phy_index[mac_index], 0x1, 0xc319, 0x0008);
                                nes_write_10G_phy_reg(nesdev, nesadapter->phy_index[mac_index], 0x1, 0xc31a, 0x0098);
                                nes_write_10G_phy_reg(nesdev, nesadapter->phy_index[mac_index], 0x3, 0x0026, 0x0E00);
-                               nes_write_10G_phy_reg(nesdev, nesadapter->phy_index[mac_index], 0x3, 0x0027, 0x0000);
+                               nes_write_10G_phy_reg(nesdev, nesadapter->phy_index[mac_index], 0x3, 0x0027, 0x0001);
                                nes_write_10G_phy_reg(nesdev, nesadapter->phy_index[mac_index], 0x3, 0x0028, 0xA528);
 
                                /*
@@ -1991,7 +1992,30 @@ int nes_napi_isr(struct nes_device *nesdev)
        }
 }
 
-
+static void process_critical_error(struct nes_device *nesdev)
+{
+       u32 debug_error;
+       u32 nes_idx_debug_error_masks0 = 0;
+       u16 error_module = 0;
+
+       debug_error = nes_read_indexed(nesdev, NES_IDX_DEBUG_ERROR_CONTROL_STATUS);
+       printk(KERN_ERR PFX "Critical Error reported by device!!! 0x%02X\n",
+                       (u16)debug_error);
+       nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_CONTROL_STATUS,
+                       0x01010000 | (debug_error & 0x0000ffff));
+       if (crit_err_count++ > 10)
+               nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS1, 1 << 0x17);
+       error_module = (u16) (debug_error & 0x0F00) >> 8;
+       if (++nesdev->nesadapter->crit_error_count[error_module-1] >=
+                       nes_max_critical_error_count) {
+               printk(KERN_ERR PFX "Masking off critical error for module "
+                       "0x%02X\n", (u16)error_module);
+               nes_idx_debug_error_masks0 = nes_read_indexed(nesdev,
+                       NES_IDX_DEBUG_ERROR_MASKS0);
+               nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS0,
+                       nes_idx_debug_error_masks0 | (1 << error_module));
+       }
+}
 /**
  * nes_dpc
  */
@@ -2006,7 +2030,6 @@ void nes_dpc(unsigned long param)
        u32 timer_stat;
        u32 temp_int_stat;
        u32 intf_int_stat;
-       u32 debug_error;
        u32 processed_intf_int = 0;
        u16 processed_timer_int = 0;
        u16 completion_ints = 0;
@@ -2084,14 +2107,7 @@ void nes_dpc(unsigned long param)
                                intf_int_stat = nes_read32(nesdev->regs+NES_INTF_INT_STAT);
                                intf_int_stat &= nesdev->intf_int_req;
                                if (NES_INTF_INT_CRITERR & intf_int_stat) {
-                                       debug_error = nes_read_indexed(nesdev, NES_IDX_DEBUG_ERROR_CONTROL_STATUS);
-                                       printk(KERN_ERR PFX "Critical Error reported by device!!! 0x%02X\n",
-                                                       (u16)debug_error);
-                                       nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_CONTROL_STATUS,
-                                                       0x01010000 | (debug_error & 0x0000ffff));
-                                       /* BUG(); */
-                                       if (crit_err_count++ > 10)
-                                               nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS1, 1 << 0x17);
+                                       process_critical_error(nesdev);
                                }
                                if (NES_INTF_INT_PCIERR & intf_int_stat) {
                                        printk(KERN_ERR PFX "PCI Error reported by device!!!\n");

diff --git a/drivers/infiniband/hw/nes/nes_hw.h b/drivers/infiniband/hw/nes/nes_hw.h
index 82d0676..1b93c57 100644 (file)
--- a/drivers/infiniband/hw/nes/nes_hw.h
+++ b/drivers/infiniband/hw/nes/nes_hw.h
@@ -1096,6 +1096,7 @@ struct nes_adapter {
        u16 pd_config_base[4];
 
        u16 link_interrupt_count[4];
+       u8 crit_error_count[32];
 
        /* the phy index for each port */
        u8  phy_index[4];