1 files changed, 108 insertions, 31 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
index 5517ea4c2aa0b..7229991ae70d4 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
@@ -8,6 +8,7 @@
  * Copyright(c) 2007 - 2015 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
+ * Copyright(c) 2018 Intel Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -35,6 +36,7 @@
  * Copyright(c) 2005 - 2015 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
+ * Copyright(c) 2018 Intel Corporation
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -73,6 +75,7 @@
 #include <linux/gfp.h>
 #include <linux/vmalloc.h>
 #include <linux/pm_runtime.h>
+#include <linux/module.h>
 
 #include "iwl-drv.h"
 #include "iwl-trans.h"
@@ -179,7 +182,8 @@ out:
 static void iwl_trans_pcie_sw_reset(struct iwl_trans *trans)
 {
 	/* Reset entire device - do controller reset (results in SHRD_HW_RST) */
-	iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
+	iwl_set_bit(trans, trans->cfg->csr->addr_sw_reset,
+		    BIT(trans->cfg->csr->flag_sw_reset));
 	usleep_range(5000, 6000);
 }
 
@@ -372,7 +376,8 @@ static int iwl_pcie_apm_init(struct iwl_trans *trans)
 	 * Set "initialization complete" bit to move adapter from
 	 * D0U* --> D0A* (powered-up active) state.
 	 */
-	iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
+	iwl_set_bit(trans, CSR_GP_CNTRL,
+		    BIT(trans->cfg->csr->flag_init_done));
 
 	/*
 	 * Wait for clock stabilization; once stabilized, access to
@@ -380,8 +385,9 @@ static int iwl_pcie_apm_init(struct iwl_trans *trans)
 	 * and accesses to uCode SRAM.
 	 */
 	ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
-			   CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
-			   CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
+			   BIT(trans->cfg->csr->flag_mac_clock_ready),
+			   BIT(trans->cfg->csr->flag_mac_clock_ready),
+			   25000);
 	if (ret < 0) {
 		IWL_ERR(trans, "Failed to init the card\n");
 		return ret;
@@ -459,15 +465,16 @@ static void iwl_pcie_apm_lp_xtal_enable(struct iwl_trans *trans)
 	 * Set "initialization complete" bit to move adapter from
 	 * D0U* --> D0A* (powered-up active) state.
 	 */
-	iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
+	iwl_set_bit(trans, CSR_GP_CNTRL,
+		    BIT(trans->cfg->csr->flag_init_done));
 
 	/*
 	 * Wait for clock stabilization; once stabilized, access to
 	 * device-internal resources is possible.
 	 */
 	ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
-			   CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
-			   CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
+			   BIT(trans->cfg->csr->flag_mac_clock_ready),
+			   BIT(trans->cfg->csr->flag_mac_clock_ready),
 			   25000);
 	if (WARN_ON(ret < 0)) {
 		IWL_ERR(trans, "Access time out - failed to enable LP XTAL\n");
@@ -519,7 +526,7 @@ static void iwl_pcie_apm_lp_xtal_enable(struct iwl_trans *trans)
 	 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
 	 */
 	iwl_clear_bit(trans, CSR_GP_CNTRL,
-		      CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
+		      BIT(trans->cfg->csr->flag_init_done));
 
 	/* Activates XTAL resources monitor */
 	__iwl_trans_pcie_set_bit(trans, CSR_MONITOR_CFG_REG,
@@ -541,11 +548,12 @@ void iwl_pcie_apm_stop_master(struct iwl_trans *trans)
 	int ret;
 
 	/* stop device's busmaster DMA activity */
-	iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
+	iwl_set_bit(trans, trans->cfg->csr->addr_sw_reset,
+		    BIT(trans->cfg->csr->flag_stop_master));
 
-	ret = iwl_poll_bit(trans, CSR_RESET,
-			   CSR_RESET_REG_FLAG_MASTER_DISABLED,
-			   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
+	ret = iwl_poll_bit(trans, trans->cfg->csr->addr_sw_reset,
+			   BIT(trans->cfg->csr->flag_master_dis),
+			   BIT(trans->cfg->csr->flag_master_dis), 100);
 	if (ret < 0)
 		IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n");
 
@@ -594,7 +602,7 @@ static void iwl_pcie_apm_stop(struct iwl_trans *trans, bool op_mode_leave)
 	 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
 	 */
 	iwl_clear_bit(trans, CSR_GP_CNTRL,
-		      CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
+		      BIT(trans->cfg->csr->flag_init_done));
 }
 
 static int iwl_pcie_nic_init(struct iwl_trans *trans)
@@ -1267,7 +1275,7 @@ static void _iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool low_power)
 
 	/* Make sure (redundant) we've released our request to stay awake */
 	iwl_clear_bit(trans, CSR_GP_CNTRL,
-		      CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
+		      BIT(trans->cfg->csr->flag_mac_access_req));
 
 	/* Stop the device, and put it in low power state */
 	iwl_pcie_apm_stop(trans, false);
@@ -1497,9 +1505,9 @@ static void iwl_trans_pcie_d3_suspend(struct iwl_trans *trans, bool test,
 	iwl_pcie_synchronize_irqs(trans);
 
 	iwl_clear_bit(trans, CSR_GP_CNTRL,
-		      CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
+		      BIT(trans->cfg->csr->flag_mac_access_req));
 	iwl_clear_bit(trans, CSR_GP_CNTRL,
-		      CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
+		      BIT(trans->cfg->csr->flag_init_done));
 
 	iwl_pcie_enable_rx_wake(trans, false);
 
@@ -1543,15 +1551,17 @@ static int iwl_trans_pcie_d3_resume(struct iwl_trans *trans,
 		iwl_pcie_reset_ict(trans);
 	iwl_enable_interrupts(trans);
 
-	iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
-	iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
+	iwl_set_bit(trans, CSR_GP_CNTRL,
+		    BIT(trans->cfg->csr->flag_mac_access_req));
+	iwl_set_bit(trans, CSR_GP_CNTRL,
+		    BIT(trans->cfg->csr->flag_init_done));
 
 	if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_8000)
 		udelay(2);
 
 	ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
-			   CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
-			   CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
+			   BIT(trans->cfg->csr->flag_mac_clock_ready),
+			   BIT(trans->cfg->csr->flag_mac_clock_ready),
 			   25000);
 	if (ret < 0) {
 		IWL_ERR(trans, "Failed to resume the device (mac ready)\n");
@@ -1562,7 +1572,7 @@ static int iwl_trans_pcie_d3_resume(struct iwl_trans *trans,
 
 	if (!reset) {
 		iwl_clear_bit(trans, CSR_GP_CNTRL,
-			      CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
+			      BIT(trans->cfg->csr->flag_mac_access_req));
 	} else {
 		iwl_trans_pcie_tx_reset(trans);
 
@@ -1926,6 +1936,29 @@ static void iwl_trans_pcie_set_pmi(struct iwl_trans *trans, bool state)
 		clear_bit(STATUS_TPOWER_PMI, &trans->status);
 }
 
+struct iwl_trans_pcie_removal {
+	struct pci_dev *pdev;
+	struct work_struct work;
+};
+
+static void iwl_trans_pcie_removal_wk(struct work_struct *wk)
+{
+	struct iwl_trans_pcie_removal *removal =
+		container_of(wk, struct iwl_trans_pcie_removal, work);
+	struct pci_dev *pdev = removal->pdev;
+	char *prop[] = {"EVENT=INACCESSIBLE", NULL};
+
+	dev_err(&pdev->dev, "Device gone - attempting removal\n");
+	kobject_uevent_env(&pdev->dev.kobj, KOBJ_CHANGE, prop);
+	pci_lock_rescan_remove();
+	pci_dev_put(pdev);
+	pci_stop_and_remove_bus_device(pdev);
+	pci_unlock_rescan_remove();
+
+	kfree(removal);
+	module_put(THIS_MODULE);
+}
+
 static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans,
 					   unsigned long *flags)
 {
@@ -1939,7 +1972,7 @@ static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans,
 
 	/* this bit wakes up the NIC */
 	__iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL,
-				 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
+				 BIT(trans->cfg->csr->flag_mac_access_req));
 	if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_8000)
 		udelay(2);
 
@@ -1964,15 +1997,59 @@ static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans,
 	 * and do not save/restore SRAM when power cycling.
 	 */
 	ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
-			   CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
-			   (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
+			   BIT(trans->cfg->csr->flag_val_mac_access_en),
+			   (BIT(trans->cfg->csr->flag_mac_clock_ready) |
 			    CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
 	if (unlikely(ret < 0)) {
-		iwl_trans_pcie_dump_regs(trans);
-		iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
+		u32 cntrl = iwl_read32(trans, CSR_GP_CNTRL);
+
 		WARN_ONCE(1,
 			  "Timeout waiting for hardware access (CSR_GP_CNTRL 0x%08x)\n",
-			  iwl_read32(trans, CSR_GP_CNTRL));
+			  cntrl);
+
+		iwl_trans_pcie_dump_regs(trans);
+
+		if (iwlwifi_mod_params.remove_when_gone && cntrl == ~0U) {
+			struct iwl_trans_pcie_removal *removal;
+
+			if (trans_pcie->scheduled_for_removal)
+				goto err;
+
+			IWL_ERR(trans, "Device gone - scheduling removal!\n");
+
+			/*
+			 * get a module reference to avoid doing this
+			 * while unloading anyway and to avoid
+			 * scheduling a work with code that's being
+			 * removed.
+			 */
+			if (!try_module_get(THIS_MODULE)) {
+				IWL_ERR(trans,
+					"Module is being unloaded - abort\n");
+				goto err;
+			}
+
+			removal = kzalloc(sizeof(*removal), GFP_ATOMIC);
+			if (!removal) {
+				module_put(THIS_MODULE);
+				goto err;
+			}
+			/*
+			 * we don't need to clear this flag, because
+			 * the trans will be freed and reallocated.
+			*/
+			trans_pcie->scheduled_for_removal = true;
+
+			removal->pdev = to_pci_dev(trans->dev);
+			INIT_WORK(&removal->work, iwl_trans_pcie_removal_wk);
+			pci_dev_get(removal->pdev);
+			schedule_work(&removal->work);
+		} else {
+			iwl_write32(trans, CSR_RESET,
+				    CSR_RESET_REG_FLAG_FORCE_NMI);
+		}
+
+err:
 		spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags);
 		return false;
 	}
@@ -2003,7 +2080,7 @@ static void iwl_trans_pcie_release_nic_access(struct iwl_trans *trans,
 		goto out;
 
 	__iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
-				   CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
+				   BIT(trans->cfg->csr->flag_mac_access_req));
 	/*
 	 * Above we read the CSR_GP_CNTRL register, which will flush
 	 * any previous writes, but we need the write that clears the
@@ -3232,12 +3309,12 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
 		 * id located at the AUX bus MISC address space.
 		 */
 		iwl_set_bit(trans, CSR_GP_CNTRL,
-			    CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
+			    BIT(trans->cfg->csr->flag_init_done));
 		udelay(2);
 
 		ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
-				   CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
-				   CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
+				   BIT(trans->cfg->csr->flag_mac_clock_ready),
+				   BIT(trans->cfg->csr->flag_mac_clock_ready),
 				   25000);
 		if (ret < 0) {
 			IWL_DEBUG_INFO(trans, "Failed to wake up the nic\n");