5 files changed, 153 insertions, 37 deletions

diff --git a/drivers/net/e1000e/e1000.h b/drivers/net/e1000e/e1000.h
index 0a1916b0419d..c55de1c027af 100644
--- a/drivers/net/e1000e/e1000.h
+++ b/drivers/net/e1000e/e1000.h
@@ -270,7 +270,6 @@ struct e1000_adapter {
         struct net_device *netdev;
         struct pci_dev *pdev;
         struct net_device_stats net_stats;
-        spinlock_t stats_lock;      /* prevent concurrent stats updates */
 
         /* structs defined in e1000_hw.h */
         struct e1000_hw hw;
@@ -300,6 +299,8 @@ struct e1000_adapter {
         unsigned long led_status;
 
         unsigned int flags;
+        struct work_struct downshift_task;
+        struct work_struct update_phy_task;
 };
 
 struct e1000_info {
@@ -321,6 +322,7 @@ struct e1000_info {
 #define FLAG_HAS_CTRLEXT_ON_LOAD          (1 << 5)
 #define FLAG_HAS_SWSM_ON_LOAD             (1 << 6)
 #define FLAG_HAS_JUMBO_FRAMES             (1 << 7)
+#define FLAG_READ_ONLY_NVM                (1 << 8)
 #define FLAG_IS_ICH                       (1 << 9)
 #define FLAG_HAS_MSIX                     (1 << 10)
 #define FLAG_HAS_SMART_POWER_DOWN         (1 << 11)
@@ -406,6 +408,7 @@ extern bool e1000e_enable_mng_pass_thru(struct e1000_hw *hw);
 extern bool e1000e_get_laa_state_82571(struct e1000_hw *hw);
 extern void e1000e_set_laa_state_82571(struct e1000_hw *hw, bool state);
 
+extern void e1000e_write_protect_nvm_ich8lan(struct e1000_hw *hw);
 extern void e1000e_set_kmrn_lock_loss_workaround_ich8lan(struct e1000_hw *hw,
                                                  bool state);
 extern void e1000e_igp3_phy_powerdown_workaround_ich8lan(struct e1000_hw *hw);
diff --git a/drivers/net/e1000e/ethtool.c b/drivers/net/e1000e/ethtool.c
index 52b762eb1745..70c11c811a08 100644
--- a/drivers/net/e1000e/ethtool.c
+++ b/drivers/net/e1000e/ethtool.c
@@ -432,6 +432,10 @@ static void e1000_get_regs(struct net_device *netdev,
         regs_buff[11] = er32(TIDV);
 
         regs_buff[12] = adapter->hw.phy.type;  /* PHY type (IGP=1, M88=0) */
+
+        /* ethtool doesn't use anything past this point, so all this
+         * code is likely legacy junk for apps that may or may not
+         * exist */
         if (hw->phy.type == e1000_phy_m88) {
                 e1e_rphy(hw, M88E1000_PHY_SPEC_STATUS, &phy_data);
                 regs_buff[13] = (u32)phy_data; /* cable length */
@@ -447,7 +451,7 @@ static void e1000_get_regs(struct net_device *netdev,
                 regs_buff[22] = adapter->phy_stats.receive_errors;
                 regs_buff[23] = regs_buff[13]; /* mdix mode */
         }
-        regs_buff[21] = adapter->phy_stats.idle_errors;  /* phy idle errors */
+        regs_buff[21] = 0; /* was idle_errors */
         e1e_rphy(hw, PHY_1000T_STATUS, &phy_data);
         regs_buff[24] = (u32)phy_data;  /* phy local receiver status */
         regs_buff[25] = regs_buff[24];  /* phy remote receiver status */
@@ -529,6 +533,9 @@ static int e1000_set_eeprom(struct net_device *netdev,
         if (eeprom->magic != (adapter->pdev->vendor | (adapter->pdev->device << 16)))
                 return -EFAULT;
 
+        if (adapter->flags & FLAG_READ_ONLY_NVM)
+                return -EINVAL;
+
         max_len = hw->nvm.word_size * 2;
 
         first_word = eeprom->offset >> 1;
diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c
index 692251b60915..523b9716a543 100644
--- a/drivers/net/e1000e/ich8lan.c
+++ b/drivers/net/e1000e/ich8lan.c
@@ -60,6 +60,7 @@
 #define ICH_FLASH_HSFCTL                0x0006
 #define ICH_FLASH_FADDR                 0x0008
 #define ICH_FLASH_FDATA0                0x0010
+#define ICH_FLASH_PR0                   0x0074
 
 #define ICH_FLASH_READ_COMMAND_TIMEOUT  500
 #define ICH_FLASH_WRITE_COMMAND_TIMEOUT 500
@@ -152,6 +153,19 @@ union ich8_hws_flash_regacc {
         u16 regval;
 };
 
+/* ICH Flash Protected Region */
+union ich8_flash_protected_range {
+        struct ich8_pr {
+                u32 base:13;     /* 0:12 Protected Range Base */
+                u32 reserved1:2; /* 13:14 Reserved */
+                u32 rpe:1;       /* 15 Read Protection Enable */
+                u32 limit:13;    /* 16:28 Protected Range Limit */
+                u32 reserved2:2; /* 29:30 Reserved */
+                u32 wpe:1;       /* 31 Write Protection Enable */
+        } range;
+        u32 regval;
+};
+
 static s32 e1000_setup_link_ich8lan(struct e1000_hw *hw);
 static void e1000_clear_hw_cntrs_ich8lan(struct e1000_hw *hw);
 static void e1000_initialize_hw_bits_ich8lan(struct e1000_hw *hw);
@@ -371,6 +385,9 @@ static s32 e1000_get_variants_ich8lan(struct e1000_adapter *adapter)
         return 0;
 }
 
+static DEFINE_MUTEX(nvm_mutex);
+static pid_t nvm_owner = -1;
+
 /**
  *  e1000_acquire_swflag_ich8lan - Acquire software control flag
  *  @hw: pointer to the HW structure
@@ -384,6 +401,15 @@ static s32 e1000_acquire_swflag_ich8lan(struct e1000_hw *hw)
         u32 extcnf_ctrl;
         u32 timeout = PHY_CFG_TIMEOUT;
 
+        might_sleep();
+
+        if (!mutex_trylock(&nvm_mutex)) {
+                WARN(1, KERN_ERR "e1000e mutex contention. Owned by pid %d\n",
+                     nvm_owner);
+                mutex_lock(&nvm_mutex);
+        }
+        nvm_owner = current->pid;
+
         while (timeout) {
                 extcnf_ctrl = er32(EXTCNF_CTRL);
                 extcnf_ctrl |= E1000_EXTCNF_CTRL_SWFLAG;
@@ -400,6 +426,8 @@ static s32 e1000_acquire_swflag_ich8lan(struct e1000_hw *hw)
                 hw_dbg(hw, "FW or HW has locked the resource for too long.\n");
                 extcnf_ctrl &= ~E1000_EXTCNF_CTRL_SWFLAG;
                 ew32(EXTCNF_CTRL, extcnf_ctrl);
+                nvm_owner = -1;
+                mutex_unlock(&nvm_mutex);
                 return -E1000_ERR_CONFIG;
         }
 
@@ -421,6 +449,9 @@ static void e1000_release_swflag_ich8lan(struct e1000_hw *hw)
         extcnf_ctrl = er32(EXTCNF_CTRL);
         extcnf_ctrl &= ~E1000_EXTCNF_CTRL_SWFLAG;
         ew32(EXTCNF_CTRL, extcnf_ctrl);
+
+        nvm_owner = -1;
+        mutex_unlock(&nvm_mutex);
 }
 
 /**
@@ -1386,6 +1417,7 @@ static s32 e1000_update_nvm_checksum_ich8lan(struct e1000_hw *hw)
          * programming failed.
          */
         if (ret_val) {
+                /* Possibly read-only, see e1000e_write_protect_nvm_ich8lan() */
                 hw_dbg(hw, "Flash commit failed.\n");
                 e1000_release_swflag_ich8lan(hw);
                 return ret_val;
@@ -1476,6 +1508,49 @@ static s32 e1000_validate_nvm_checksum_ich8lan(struct e1000_hw *hw)
 }
 
 /**
+ *  e1000e_write_protect_nvm_ich8lan - Make the NVM read-only
+ *  @hw: pointer to the HW structure
+ *
+ *  To prevent malicious write/erase of the NVM, set it to be read-only
+ *  so that the hardware ignores all write/erase cycles of the NVM via
+ *  the flash control registers.  The shadow-ram copy of the NVM will
+ *  still be updated, however any updates to this copy will not stick
+ *  across driver reloads.
+ **/
+void e1000e_write_protect_nvm_ich8lan(struct e1000_hw *hw)
+{
+        union ich8_flash_protected_range pr0;
+        union ich8_hws_flash_status hsfsts;
+        u32 gfpreg;
+        s32 ret_val;
+
+        ret_val = e1000_acquire_swflag_ich8lan(hw);
+        if (ret_val)
+                return;
+
+        gfpreg = er32flash(ICH_FLASH_GFPREG);
+
+        /* Write-protect GbE Sector of NVM */
+        pr0.regval = er32flash(ICH_FLASH_PR0);
+        pr0.range.base = gfpreg & FLASH_GFPREG_BASE_MASK;
+        pr0.range.limit = ((gfpreg >> 16) & FLASH_GFPREG_BASE_MASK);
+        pr0.range.wpe = true;
+        ew32flash(ICH_FLASH_PR0, pr0.regval);
+
+        /*
+         * Lock down a subset of GbE Flash Control Registers, e.g.
+         * PR0 to prevent the write-protection from being lifted.
+         * Once FLOCKDN is set, the registers protected by it cannot
+         * be written until FLOCKDN is cleared by a hardware reset.
+         */
+        hsfsts.regval = er16flash(ICH_FLASH_HSFSTS);
+        hsfsts.hsf_status.flockdn = true;
+        ew32flash(ICH_FLASH_HSFSTS, hsfsts.regval);
+
+        e1000_release_swflag_ich8lan(hw);
+}
+
+/**
  *  e1000_write_flash_data_ich8lan - Writes bytes to the NVM
  *  @hw: pointer to the HW structure
  *  @offset: The offset (in bytes) of the byte/word to read.
@@ -1822,6 +1897,9 @@ static s32 e1000_reset_hw_ich8lan(struct e1000_hw *hw)
         ew32(CTRL, (ctrl | E1000_CTRL_RST));
         msleep(20);
 
+        /* release the swflag because it is not reset by hardware reset */
+        e1000_release_swflag_ich8lan(hw);
+
         ret_val = e1000e_get_auto_rd_done(hw);
         if (ret_val) {
                 /*
diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index 24d05cb70055..1b72749979c4 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -47,7 +47,7 @@
 
 #include "e1000.h"
 
-#define DRV_VERSION "0.3.3.3-k2"
+#define DRV_VERSION "0.3.3.3-k6"
 char e1000e_driver_name[] = "e1000e";
 const char e1000e_driver_version[] = DRV_VERSION;
 
@@ -1117,6 +1117,14 @@ static void e1000_clean_rx_ring(struct e1000_adapter *adapter)
         writel(0, adapter->hw.hw_addr + rx_ring->tail);
 }
 
+static void e1000e_downshift_workaround(struct work_struct *work)
+{
+        struct e1000_adapter *adapter = container_of(work,
+                                        struct e1000_adapter, downshift_task);
+
+        e1000e_gig_downshift_workaround_ich8lan(&adapter->hw);
+}
+
 /**
  * e1000_intr_msi - Interrupt Handler
  * @irq: interrupt number
@@ -1141,7 +1149,7 @@ static irqreturn_t e1000_intr_msi(int irq, void *data)
                  */
                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
                     (!(er32(STATUS) & E1000_STATUS_LU)))
-                        e1000e_gig_downshift_workaround_ich8lan(hw);
+                        schedule_work(&adapter->downshift_task);
 
                 /*
                  * 80003ES2LAN workaround-- For packet buffer work-around on
@@ -1207,7 +1215,7 @@ static irqreturn_t e1000_intr(int irq, void *data)
                  */
                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
                     (!(er32(STATUS) & E1000_STATUS_LU)))
-                        e1000e_gig_downshift_workaround_ich8lan(hw);
+                        schedule_work(&adapter->downshift_task);
 
                 /*
                  * 80003ES2LAN workaround--
@@ -2905,8 +2913,6 @@ static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
         /* Explicitly disable IRQ since the NIC can be in any state. */
         e1000_irq_disable(adapter);
 
-        spin_lock_init(&adapter->stats_lock);
-
         set_bit(__E1000_DOWN, &adapter->state);
         return 0;
 }
@@ -3221,6 +3227,21 @@ static int e1000_set_mac(struct net_device *netdev, void *p)
         return 0;
 }
 
+/**
+ * e1000e_update_phy_task - work thread to update phy
+ * @work: pointer to our work struct
+ *
+ * this worker thread exists because we must acquire a
+ * semaphore to read the phy, which we could msleep while
+ * waiting for it, and we can't msleep in a timer.
+ **/
+static void e1000e_update_phy_task(struct work_struct *work)
+{
+        struct e1000_adapter *adapter = container_of(work,
+                                        struct e1000_adapter, update_phy_task);
+        e1000_get_phy_info(&adapter->hw);
+}
+
 /*
  * Need to wait a few seconds after link up to get diagnostic information from
  * the phy
@@ -3228,7 +3249,7 @@ static int e1000_set_mac(struct net_device *netdev, void *p)
 static void e1000_update_phy_info(unsigned long data)
 {
         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
-        e1000_get_phy_info(&adapter->hw);
+        schedule_work(&adapter->update_phy_task);
 }
 
 /**
@@ -3239,10 +3260,6 @@ void e1000e_update_stats(struct e1000_adapter *adapter)
 {
         struct e1000_hw *hw = &adapter->hw;
         struct pci_dev *pdev = adapter->pdev;
-        unsigned long irq_flags;
-        u16 phy_tmp;
-
-#define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
 
         /*
          * Prevent stats update while adapter is being reset, or if the pci
@@ -3253,14 +3270,6 @@ void e1000e_update_stats(struct e1000_adapter *adapter)
         if (pci_channel_offline(pdev))
                 return;
 
-        spin_lock_irqsave(&adapter->stats_lock, irq_flags);
-
-        /*
-         * these counters are modified from e1000_adjust_tbi_stats,
-         * called from the interrupt context, so they must only
-         * be written while holding adapter->stats_lock
-         */
-
         adapter->stats.crcerrs += er32(CRCERRS);
         adapter->stats.gprc += er32(GPRC);
         adapter->stats.gorc += er32(GORCL);
@@ -3332,21 +3341,10 @@ void e1000e_update_stats(struct e1000_adapter *adapter)
 
         /* Tx Dropped needs to be maintained elsewhere */
 
-        /* Phy Stats */
-        if (hw->phy.media_type == e1000_media_type_copper) {
-                if ((adapter->link_speed == SPEED_1000) &&
-                   (!e1e_rphy(hw, PHY_1000T_STATUS, &phy_tmp))) {
-                        phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
-                        adapter->phy_stats.idle_errors += phy_tmp;
-                }
-        }
-
         /* Management Stats */
         adapter->stats.mgptc += er32(MGTPTC);
         adapter->stats.mgprc += er32(MGTPRC);
         adapter->stats.mgpdc += er32(MGTPDC);
-
-        spin_unlock_irqrestore(&adapter->stats_lock, irq_flags);
 }
 
 /**
@@ -3358,10 +3356,6 @@ static void e1000_phy_read_status(struct e1000_adapter *adapter)
         struct e1000_hw *hw = &adapter->hw;
         struct e1000_phy_regs *phy = &adapter->phy_regs;
         int ret_val;
-        unsigned long irq_flags;
-
-
-        spin_lock_irqsave(&adapter->stats_lock, irq_flags);
 
         if ((er32(STATUS) & E1000_STATUS_LU) &&
             (adapter->hw.phy.media_type == e1000_media_type_copper)) {
@@ -3392,8 +3386,6 @@ static void e1000_phy_read_status(struct e1000_adapter *adapter)
                 phy->stat1000 = 0;
                 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF);
         }
-
-        spin_unlock_irqrestore(&adapter->stats_lock, irq_flags);
 }
 
 static void e1000_print_link_info(struct e1000_adapter *adapter)
@@ -4822,6 +4814,10 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
         if (err)
                 goto err_hw_init;
 
+        if ((adapter->flags & FLAG_IS_ICH) &&
+            (adapter->flags & FLAG_READ_ONLY_NVM))
+                e1000e_write_protect_nvm_ich8lan(&adapter->hw);
+
         hw->mac.ops.get_bus_info(&adapter->hw);
 
         adapter->hw.phy.autoneg_wait_to_complete = 0;
@@ -4912,6 +4908,8 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
 
         INIT_WORK(&adapter->reset_task, e1000_reset_task);
         INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
+        INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround);
+        INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task);
 
         /* Initialize link parameters. User can change them with ethtool */
         adapter->hw.mac.autoneg = 1;
diff --git a/drivers/net/e1000e/param.c b/drivers/net/e1000e/param.c
index f46db6cda487..77a3d7207a5f 100644
--- a/drivers/net/e1000e/param.c
+++ b/drivers/net/e1000e/param.c
@@ -142,6 +142,15 @@ E1000_PARAM(SmartPowerDownEnable, "Enable PHY smart power down");
  */
 E1000_PARAM(KumeranLockLoss, "Enable Kumeran lock loss workaround");
 
+/*
+ * Write Protect NVM
+ *
+ * Valid Range: 0, 1
+ *
+ * Default Value: 1 (enabled)
+ */
+E1000_PARAM(WriteProtectNVM, "Write-protect NVM [WARNING: disabling this can lead to corrupted NVM]");
+
 struct e1000_option {
         enum { enable_option, range_option, list_option } type;
         const char *name;
@@ -415,4 +424,25 @@ void __devinit e1000e_check_options(struct e1000_adapter *adapter)
                                                                        opt.def);
                 }
         }
+        { /* Write-protect NVM */
+                const struct e1000_option opt = {
+                        .type = enable_option,
+                        .name = "Write-protect NVM",
+                        .err  = "defaulting to Enabled",
+                        .def  = OPTION_ENABLED
+                };
+
+                if (adapter->flags & FLAG_IS_ICH) {
+                        if (num_WriteProtectNVM > bd) {
+                                unsigned int write_protect_nvm = WriteProtectNVM[bd];
+                                e1000_validate_option(&write_protect_nvm, &opt,
+                                                      adapter);
+                                if (write_protect_nvm)
+                                        adapter->flags |= FLAG_READ_ONLY_NVM;
+                        } else {
+                                if (opt.def)
+                                        adapter->flags |= FLAG_READ_ONLY_NVM;
+                        }
+                }
+        }
 }