misc: mods: update MODS kernel driver to 4.1

Change-Id: I56377b85ff0909dba419c8e3f6df16c9302d6dc5
Signed-off-by: Chris Dragan <kdragan@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2456573
Reviewed-by: svcguardwords <svcguardwords@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit

drivers/misc/mods/mods_acpi.c

@@ -336,7 +336,7 @@ static int mods_eval_acpi_method(struct mods_client           *client,
 				      &output);
 
 	if (ACPI_FAILURE(status)) {
-		cl_error("ACPI method %s failed\n", p->method_name);
+		cl_info("ACPI method %s failed\n", p->method_name);
 		pci_dev_put(dev);
 		LOG_EXT();
 		return -EINVAL;

drivers/misc/mods/mods_config.h

@@ -79,8 +79,16 @@
 #       define MODS_HAS_SET_MEMORY_HEADER 1
 #endif
 
+#if KERNEL_VERSION(4, 13, 0) <= MODS_KERNEL_VERSION
+#       define MODS_HAS_FLR_SUPPORT
+#if     KERNEL_VERSION(4, 17, 0) <= MODS_KERNEL_VERSION
+#              define MODS_PCIE_FLR_HAS_ERR
+#endif
+#endif
+
 #if KERNEL_VERSION(4, 16, 0) > MODS_KERNEL_VERSION && defined(CONFIG_X86)
 #       define MODS_HAS_MAP_SG_ATTRS
 #endif
 
+
 #endif /* _MODS_CONFIG_H_  */

drivers/misc/mods/mods_irq.c

@@ -127,7 +127,7 @@ void mods_disable_device(struct mods_client *client,
 	WARN_ON(!mutex_is_locked(&mp.mtx));
 
 #ifdef MODS_HAS_SRIOV
-	if (dpriv->num_vfs)
+	if (dpriv && dpriv->num_vfs)
 		pci_disable_sriov(dev);
 #endif
 

drivers/misc/mods/mods_krnl.c

@@ -1310,6 +1310,11 @@ static int esc_mods_get_screen_info(struct mods_client      *client,
 static int esc_mods_get_screen_info_2(struct mods_client        *client,
 				      struct MODS_SCREEN_INFO_2 *p)
 {
+#if defined(CONFIG_FB)
+	unsigned int i;
+	bool         found = false;
+#endif
+
 	mods_get_screen_info(&p->info);
 
 #if defined(VIDEO_CAPABILITY_64BIT_BASE)
@@ -1318,6 +1323,42 @@ static int esc_mods_get_screen_info_2(struct mods_client        *client,
 	p->ext_lfb_base = 0;
 #endif
 
+#if defined(CONFIG_FB)
+	if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
+		return OK;
+
+	/* With pci=realloc on the kernel command line, GPU BAR1 can be
+	 * reassigned after the OS console is allocated.  When this
+	 * occurs the lfb_base variable is *not* updated for an EFI
+	 * console.  The incorrect lfb_base variable will prevent other
+	 * drivers or user space applications from identifying memory
+	 * in use by the console and potentially using it themselves.
+
+	 * For an EFI console, pull the FB base address from the FB
+	 * driver registered_fb data instead of screen_info
+	 */
+	for (i = 0; i < ARRAY_SIZE(registered_fb); i++) {
+		bool skipped = true;
+
+		if (!registered_fb[i])
+			continue;
+
+		if (!strcmp(registered_fb[i]->fix.id, "EFI VGA") && !found) {
+			p->info.lfb_base =
+			 registered_fb[i]->fix.smem_start & 0xFFFFFFFF;
+			p->ext_lfb_base =
+			 registered_fb[i]->fix.smem_start >> 32;
+			found = true;
+			skipped = false;
+		}
+
+		cl_info("%s fb%d '%s' @0x%llx\n",
+			skipped ? "skip" : "found",
+			i, registered_fb[i]->fix.id,
+			(u64)registered_fb[i]->fix.smem_start);
+	}
+#endif
+
 	return OK;
 }
 #endif
@@ -1352,6 +1393,9 @@ static int esc_mods_unlock_console(struct mods_client *client)
 static int esc_mods_suspend_console(struct mods_client *client)
 {
 	int err = -EINVAL;
+#if defined(CONFIG_FB)
+	unsigned int i;
+#endif
 
 	LOG_ENT();
 
@@ -1362,19 +1406,25 @@ static int esc_mods_suspend_console(struct mods_client *client)
 	}
 
 #if defined(CONFIG_FB)
-	if (num_registered_fb) {
 	/* tell the os to block fb accesses */
-		int i = 0;
+	for (i = 0; i < ARRAY_SIZE(registered_fb); i++) {
+		bool suspended = false;
+
+		if (!registered_fb[i])
+			continue;
 
-		for (i = 0; i < num_registered_fb; i++) {
 		console_lock();
 		if (registered_fb[i]->state != FBINFO_STATE_SUSPENDED) {
 			fb_set_suspend(registered_fb[i], 1);
 			client->mods_fb_suspended[i] = 1;
+			suspended = true;
 		}
 		console_unlock();
-		}
 		err = OK;
+
+		if (suspended)
+			cl_info("suspended fb%u '%s'\n", i,
+				registered_fb[i]->fix.id);
 	}
 #endif
 
@@ -1387,9 +1437,14 @@ static int esc_mods_suspend_console(struct mods_client *client)
 		do_take_over_console(&dummy_con, 0, 0, 0);
 		console_unlock();
 		err = OK;
+
+		cl_info("switched console to dummy\n");
 	}
 #endif
 
+	if (err)
+		cl_warn("no methods to suspend console available\n");
+
 	atomic_set(&console_is_locked, 0);
 
 	LOG_EXT();
@@ -1405,6 +1460,9 @@ static int esc_mods_resume_console(struct mods_client *client)
 static int mods_resume_console(struct mods_client *client)
 {
 	int err = -EINVAL;
+#if defined(CONFIG_FB)
+	unsigned int i;
+#endif
 
 	LOG_ENT();
 
@@ -1418,18 +1476,23 @@ static int mods_resume_console(struct mods_client *client)
 	}
 
 #if defined(CONFIG_FB)
-	if (num_registered_fb) {
-		int i = 0;
+	for (i = 0; i < ARRAY_SIZE(registered_fb); i++) {
+		bool resumed = false;
+
+		if (!registered_fb[i])
+			continue;
 
-		for (i = 0; i < num_registered_fb; i++) {
 		console_lock();
 		if (client->mods_fb_suspended[i]) {
 			fb_set_suspend(registered_fb[i], 0);
 			client->mods_fb_suspended[i] = 0;
+			resumed = true;
 		}
 		console_unlock();
-		}
 		err = OK;
+
+		if (resumed)
+			cl_info("resumed fb%u\n", i);
 	}
 #endif
 
@@ -1442,6 +1505,8 @@ static int mods_resume_console(struct mods_client *client)
 		do_unbind_con_driver(vc_cons[fg_console].d->vc_sw, 0, 0, 0);
 		console_unlock();
 		err = OK;
+
+		cl_info("restored vga console\n");
 	}
 #endif
 	atomic_set(&console_is_locked, 0);

drivers/misc/mods/mods_pci.c

@@ -20,8 +20,10 @@
 
 #include "mods_internal.h"
 
+#include <linux/device.h>
 #include <linux/io.h>
 #include <linux/fs.h>
+#include <linux/pci.h>
 #if defined(MODS_HAS_DMA_OPS)
 #include <linux/dma-mapping.h>
 #endif
@@ -921,8 +923,11 @@ int esc_mods_pci_set_dma_mask(struct mods_client       *client,
 int esc_mods_pci_reset_function(struct mods_client    *client,
 				struct mods_pci_dev_2 *pcidev)
 {
+#if defined(MODS_HAS_FLR_SUPPORT)
 	int             err;
 	struct pci_dev *dev;
+	u32             cap;
+	const struct pci_error_handlers *err_handler;
 
 	LOG_ENT();
 
@@ -938,14 +943,62 @@ int esc_mods_pci_reset_function(struct mods_client    *client,
 		return err;
 	}
 
-	err = pci_reset_function(dev);
-	if (unlikely(err))
-		cl_error("pci_reset_function failed on dev %04x:%02x:%02x.%x\n",
+	pcie_capability_read_dword(dev, PCI_EXP_DEVCAP, &cap);
+	if ((dev->dev_flags & PCI_DEV_FLAGS_NO_FLR_RESET) ||
+	    !(cap & PCI_EXP_DEVCAP_FLR)) {
+		cl_error(
+			 "function level reset not supported on dev %04x:%02x:%02x.%x\n",
 			 pcidev->domain,
 			 pcidev->bus,
 			 pcidev->device,
 			 pcidev->function);
+		err = -ENOTTY;
+		goto error;
+	}
+
+	pci_cfg_access_lock(dev);
+	device_lock(&dev->dev);
+
+	err_handler = dev->driver ? dev->driver->err_handler : NULL;
+	if (err_handler && err_handler->reset_prepare)
+		err_handler->reset_prepare(dev);
+
+	pci_set_power_state(dev, PCI_D0);
+	pci_save_state(dev);
+	pci_write_config_word(dev, PCI_COMMAND, PCI_COMMAND_INTX_DISABLE);
+
+#if defined(MODS_PCIE_FLR_HAS_ERR)
+	err = pcie_flr(dev);
+
+	if (unlikely(err))
+		cl_error("pcie_flr failed on dev %04x:%02x:%02x.%x\n",
+			 pcidev->domain,
+			 pcidev->bus,
+			 pcidev->device,
+			 pcidev->function);
+#else
+	pcie_flr(dev);
+#endif
+
+	if (!err)
+		cl_info("pcie_flr succeeded on dev %04x:%02x:%02x.%x\n",
+			pcidev->domain,
+			pcidev->bus,
+			pcidev->device,
+			pcidev->function);
+
+	pci_restore_state(dev);
+
+	if (err_handler && err_handler->reset_done)
+		err_handler->reset_done(dev);
+
+	device_unlock(&dev->dev);
+	pci_cfg_access_unlock(dev);
+error:
 	pci_dev_put(dev);
 	LOG_EXT();
 	return err;
+#else
+	return -EINVAL;
+#endif
 }

include/uapi/misc/mods.h

@@ -24,8 +24,8 @@
 #include <linux/types.h>
 
 /* Driver version */
-#define MODS_DRIVER_VERSION_MAJOR 3
-#define MODS_DRIVER_VERSION_MINOR 99
+#define MODS_DRIVER_VERSION_MAJOR 4
+#define MODS_DRIVER_VERSION_MINOR 1
 #define MODS_DRIVER_VERSION ((MODS_DRIVER_VERSION_MAJOR << 8) | \
 			     ((MODS_DRIVER_VERSION_MINOR / 10) << 4) | \
 			     (MODS_DRIVER_VERSION_MINOR % 10))
@@ -830,7 +830,7 @@ struct MODS_REGISTER_IRQ_3 {
 /* Used by ioctls:
  * - MODS_ESC_UNREGISTER_IRQ_2
  * - MODS_ESC_REGISTER_IRQ_2 (deprectated)
- * - MODS_ESC_IRQ_HANDLED_2 (deprectated)
+ * - MODS_ESC_IRQ_HANDLED_2 (only Tegra)
  *
  * MODS_ESC_UNREGISTER_IRQ_2 is used to unhook interrupt for the given device.
  */
@@ -1848,7 +1848,6 @@ struct MODS_IOMMU_DMA_MAP_MEMORY {
 /* Deprecated */
 #define MODS_ESC_REGISTER_IRQ_2 MODSIO(W, 64, MODS_REGISTER_IRQ_2)
 #define MODS_ESC_UNREGISTER_IRQ_2 MODSIO(W, 65, MODS_REGISTER_IRQ_2)
-/* Deprecated */
 #define MODS_ESC_IRQ_HANDLED_2 MODSIO(W, 66, MODS_REGISTER_IRQ_2)
 /* Deprecated */
 #define MODS_ESC_QUERY_IRQ_2 MODSIO(R, 67, MODS_QUERY_IRQ_2)