misc: mods: add new ioctls

Add ioctls to read device properties and map proximity id to NUMA node.

Bug 3538850

Change-Id: I65b6decbdfbe12de7d1f1eb3edbb71b9fd56fb8a
Signed-off-by: Chris Dragan <kdragan@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2786128
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>

drivers/misc/mods/mods_acpi.c

@@ -719,3 +719,12 @@ int esc_mods_get_acpi_dev_children(struct mods_client                *client,
 	LOG_EXT();
 	return err;
 }
+
+#ifdef MODS_HAS_PXM_TO_NODE
+int esc_mods_proximity_to_numa_node(struct mods_client                 *client,
+				    struct MODS_PROXIMITY_TO_NUMA_NODE *p)
+{
+	p->numa_node = acpi_map_pxm_to_node(p->proximity);
+	return OK;
+}
+#endif

drivers/misc/mods/mods_config.h

@@ -73,6 +73,10 @@
 #       define MODS_HAS_CONSOLE_BINDING 1
 #endif
 
+#if KERNEL_VERSION(3, 19, 0) <= MODS_KERNEL_VERSION
+#       define MODS_HAS_DEV_PROPS 1
+#endif
+
 #if defined(CONFIG_PPC64) && KERNEL_VERSION(4, 5, 0) <= MODS_KERNEL_VERSION
 #       define MODS_HAS_PNV_PCI_GET_NPU_DEV 1
 #endif
@@ -100,6 +104,10 @@
 #       define MODS_PCIE_FLR_HAS_ERR
 #endif
 
+#if defined(CONFIG_ACPI_NUMA) && KERNEL_VERSION(5, 1, 0) <= MODS_KERNEL_VERSION
+#       define MODS_HAS_PXM_TO_NODE 1
+#endif
+
 #if KERNEL_VERSION(5, 17, 0) <= MODS_KERNEL_VERSION
 #       define MODS_HAS_ACPI_FETCH 1
 #endif

drivers/misc/mods/mods_internal.h

@@ -502,6 +502,10 @@ int esc_mods_acpi_get_ddc_2(struct mods_client         *client,
 			    struct MODS_ACPI_GET_DDC_2 *p);
 int esc_mods_get_acpi_dev_children(struct mods_client    *client,
 				   struct MODS_GET_ACPI_DEV_CHILDREN *p);
+#ifdef MODS_HAS_PXM_TO_NODE
+int esc_mods_proximity_to_numa_node(struct mods_client                 *client,
+				    struct MODS_PROXIMITY_TO_NUMA_NODE *p);
+#endif
 #endif
 /* pci */
 #ifdef CONFIG_PCI
@@ -550,6 +554,10 @@ int esc_mods_pci_set_dma_mask(struct mods_client      *client,
 			     struct MODS_PCI_DMA_MASK *dma_mask);
 int esc_mods_pci_reset_function(struct mods_client    *client,
 				struct mods_pci_dev_2 *pcidev);
+#ifdef MODS_HAS_DEV_PROPS
+int esc_mods_read_dev_property(struct mods_client            *client,
+			       struct MODS_READ_DEV_PROPERTY *p);
+#endif
 #endif
 /* irq */
 #if defined(MODS_HAS_TEGRA) && defined(CONFIG_OF) && defined(CONFIG_OF_IRQ)

drivers/misc/mods/mods_krnl.c

@@ -2029,6 +2029,14 @@ static long mods_krnl_ioctl(struct file  *fp,
 			   esc_mods_pci_reset_function,
 			   mods_pci_dev_2);
 		break;
+
+#ifdef MODS_HAS_DEV_PROPS
+	case MODS_ESC_READ_DEV_PROPERTY:
+		MODS_IOCTL(MODS_ESC_READ_DEV_PROPERTY,
+			   esc_mods_read_dev_property,
+			   MODS_READ_DEV_PROPERTY);
+		break;
+#endif
 #endif
 
 	case MODS_ESC_ALLOC_PAGES:
@@ -2257,8 +2265,17 @@ static long mods_krnl_ioctl(struct file  *fp,
 
 	case MODS_ESC_GET_ACPI_DEV_CHILDREN:
 		MODS_IOCTL(MODS_ESC_GET_ACPI_DEV_CHILDREN,
-			   esc_mods_get_acpi_dev_children, MODS_GET_ACPI_DEV_CHILDREN);
+			   esc_mods_get_acpi_dev_children,
+			   MODS_GET_ACPI_DEV_CHILDREN);
 		break;
+
+#ifdef MODS_HAS_PXM_TO_NODE
+	case MODS_ESC_PROXIMITY_TO_NUMA_NODE:
+		MODS_IOCTL(MODS_ESC_PROXIMITY_TO_NUMA_NODE,
+			   esc_mods_proximity_to_numa_node,
+			   MODS_PROXIMITY_TO_NUMA_NODE);
+		break;
+#endif
 #else
 	case MODS_ESC_EVAL_ACPI_METHOD:
 		/* fallthrough */
@@ -2437,7 +2454,7 @@ static long mods_krnl_ioctl(struct file  *fp,
 			   MODS_DMA_TX_DESC);
 		break;
 	case MODS_ESC_DMA_TX_WAIT:
-		MODS_IOCTL(MODS_ESC_DMA_TX_WAIT,
+		MODS_IOCTL(MODS_MODS_ESC_DMA_TX_WAIT,
 			   esc_mods_dma_wait,
 			   MODS_DMA_WAIT_DESC);
 		break;

drivers/misc/mods/mods_pci.c

@@ -21,11 +21,14 @@
 #include "mods_internal.h"
 
 #include <linux/device.h>
+#if defined(MODS_HAS_DMA_OPS)
+#include <linux/dma-mapping.h>
+#endif
 #include <linux/io.h>
 #include <linux/fs.h>
 #include <linux/pci.h>
-#if defined(MODS_HAS_DMA_OPS)
+#if KERNEL_VERSION(3, 19, 0) <= MODS_KERNEL_VERSION
-#include <linux/dma-mapping.h>
+#include <linux/property.h>
 #endif
 
 int mods_is_pci_dev(struct pci_dev        *dev,
@@ -1006,3 +1009,57 @@ error:
 	return -EINVAL;
 #endif
 }
+
+#ifdef MODS_HAS_DEV_PROPS
+int esc_mods_read_dev_property(struct mods_client            *client,
+			       struct MODS_READ_DEV_PROPERTY *p)
+{
+	struct pci_dev *dev = NULL;
+	int             err = -EINVAL;
+
+	LOG_ENT();
+
+	if (unlikely(p->type != MODS_PROP_TYPE_U64)) {
+		cl_error("invalid property type %u\n", p->type);
+		goto error;
+	}
+
+	if (unlikely(sizeof(64) * p->array_size > sizeof(p->output))) {
+		cl_error("requested size %zu exceeds output array size %zu\n",
+			 sizeof(u64) * p->array_size,
+			 sizeof(p->output));
+		goto error;
+	}
+
+	if (unlikely(p->array_size == 0)) {
+		cl_error("invalid output array size 0\n");
+		goto error;
+	}
+
+	if (!memchr(p->prop_name, 0, sizeof(p->prop_name))) {
+		cl_error("invalid property name, misses terminating NUL\n");
+		goto error;
+	}
+
+	err = mods_find_pci_dev(client, &p->pci_device, &dev);
+	if (unlikely(err)) {
+		if (err == -ENODEV)
+			cl_error("dev %04x:%02x:%02x.%x not found\n",
+				 p->pci_device.domain,
+				 p->pci_device.bus,
+				 p->pci_device.device,
+				 p->pci_device.function);
+		goto error;
+	}
+
+	err = device_property_read_u64_array(&dev->dev, p->prop_name,
+					     (u64 *)p->output, p->array_size);
+	if (unlikely(err))
+		cl_error("failed to read property %s\n", p->prop_name);
+
+error:
+	pci_dev_put(dev);
+	LOG_EXT();
+	return err;
+}
+#endif

include/uapi/misc/mods.h

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 /*
- * mods.h - This file is part of NVIDIA MODS kernel driver.
+ * This file is part of NVIDIA MODS kernel driver.
  *
  * Copyright (c) 2008-2022, NVIDIA CORPORATION.  All rights reserved.
  *
@@ -1639,7 +1639,6 @@ struct MODS_DMA_HANDLE_2 {
 	char ctrl_dir[MODS_DMA_HANDLE_CTRL_DIR_LEN];
 };
 
-
 enum MODS_DMA_TRANSFER_DIRECTION {
 	MODS_DMA_MEM_TO_MEM,
 	MODS_DMA_MEM_TO_DEV,
@@ -1861,6 +1860,39 @@ struct MODS_TEGRA_OIST_STATUS {
 
 #define MODS_IOMMU_MAP_CONTIGUOUS 1
 
+#define MODS_MAX_PROP_NAME_LEN 64
+#define MODS_MAX_PROP_SIZE     8192
+
+#define MODS_PROP_TYPE_U64 8
+
+/* Used by MODS_ESC_READ_DEV_PROPERTY
+ *
+ * Reads a device property from firmware.
+ */
+struct MODS_READ_DEV_PROPERTY {
+	/* IN */
+	struct mods_pci_dev_2 pci_device;
+	char                  prop_name[MODS_MAX_PROP_NAME_LEN];
+	__u32                 array_size;
+	__u8                  type;
+	__u8                  dummy_align[3];
+
+	/* OUT */
+	__u8                  output[MODS_MAX_PROP_SIZE];
+};
+
+/* Used by MODS_ESC_PROXIMITY_TO_NUMA_NODE
+ *
+ * Converts proximity id to NUMA node id.
+ */
+struct MODS_PROXIMITY_TO_NUMA_NODE {
+	/* IN */
+	__s32 proximity;
+
+	/* OUT */
+	__s32 numa_node;
+};
+
 #pragma pack(pop)
 
 #define MODS_IOC_MAGIC 'x'
@@ -2063,5 +2095,7 @@ struct MODS_TEGRA_OIST_STATUS {
 #define MODS_ESC_SEND_TZ_MSG MODSIO(WR, 139, MODS_TZ_PARAMS)
 #define MODS_ESC_OIST_STATUS MODSIO(WR, 140, MODS_TEGRA_OIST_STATUS)
 #define MODS_ESC_INVOKE_OPTEE_TA MODSIO(WR, 141, MODS_OPTEE_PARAMS)
+#define MODS_ESC_READ_DEV_PROPERTY MODSIO(WR, 142, MODS_READ_DEV_PROPERTY)
+#define MODS_ESC_PROXIMITY_TO_NUMA_NODE MODSIO(WR, 143, MODS_PROXIMITY_TO_NUMA_NODE)
 
 #endif /* _UAPI_MODS_H_  */