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c700e8f91c
open-gpu-kernel-modules/kernel-open/nvidia/nv.c
Andy Ritger c700e8f91c
515.86.01
2022-11-22 10:04:21 -08:00

5637 lines
137 KiB
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/*
* SPDX-FileCopyrightText: Copyright (c) 1999-2022 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "nvmisc.h"
#include "os-interface.h"
#include "nv-linux.h"
#include "nv-p2p.h"
#include "nv-reg.h"
#include "nv-msi.h"
#include "nv-pci-table.h"
#if defined(NV_UVM_ENABLE)
#include "nv_uvm_interface.h"
#endif
#if defined(NV_VGPU_KVM_BUILD)
#include "nv-vgpu-vfio-interface.h"
#endif
#include "nvlink_proto.h"
#include "nvlink_caps.h"
#include "nv-frontend.h"
#include "nv-hypervisor.h"
#include "nv-ibmnpu.h"
#include "nv-rsync.h"
#include "nv-kthread-q.h"
#include "nv-pat.h"
#include "nv-dmabuf.h"
#if !defined(CONFIG_RETPOLINE)
#include "nv-retpoline.h"
#endif
#include <linux/firmware.h>
#include <sound/core.h> /* HDA struct snd_card */
#include <asm/cache.h>
#if defined(NV_SOUND_HDAUDIO_H_PRESENT)
#include "sound/hdaudio.h"
#endif
#if defined(NV_SOUND_HDA_CODEC_H_PRESENT)
#include <sound/core.h>
#include <sound/hda_codec.h>
#include <sound/hda_verbs.h>
#endif
#if defined(NV_SEQ_READ_ITER_PRESENT)
#include <linux/uio.h>
#include <linux/seq_file.h>
#include <linux/kernfs.h>
#endif
#include <linux/dmi.h> /* System DMI info */
#include <linux/ioport.h>
#include "conftest/patches.h"
#define RM_THRESHOLD_TOTAL_IRQ_COUNT 100000
#define RM_THRESHOLD_UNAHNDLED_IRQ_COUNT 99900
#define RM_UNHANDLED_TIMEOUT_US 100000
const NvBool nv_is_rm_firmware_supported_os = NV_TRUE;
// Deprecated, use NV_REG_ENABLE_GPU_FIRMWARE instead
char *rm_firmware_active = NULL;
NV_MODULE_STRING_PARAMETER(rm_firmware_active);
#define NV_FIRMWARE_GSP_FILENAME "nvidia/" NV_VERSION_STRING "/gsp.bin"
#define NV_FIRMWARE_GSP_LOG_FILENAME "nvidia/" NV_VERSION_STRING "/gsp_log.bin"
MODULE_FIRMWARE(NV_FIRMWARE_GSP_FILENAME);
/*
* Global NVIDIA capability state, for GPU driver
*/
nv_cap_t *nvidia_caps_root = NULL;
/*
* our global state; one per device
*/
NvU32 num_nv_devices = 0;
NvU32 num_probed_nv_devices = 0;
nv_linux_state_t *nv_linux_devices;
/*
* And one for the control device
*/
nv_linux_state_t nv_ctl_device = { { 0 } };
extern NvU32 nv_dma_remap_peer_mmio;
nv_kthread_q_t nv_kthread_q;
nv_kthread_q_t nv_deferred_close_kthread_q;
struct rw_semaphore nv_system_pm_lock;
#if defined(CONFIG_PM)
static nv_power_state_t nv_system_power_state;
static nv_pm_action_depth_t nv_system_pm_action_depth;
struct semaphore nv_system_power_state_lock;
#endif
void *nvidia_p2p_page_t_cache;
static void *nvidia_pte_t_cache;
void *nvidia_stack_t_cache;
static nvidia_stack_t *__nv_init_sp;
static int nv_tce_bypass_mode = NV_TCE_BYPASS_MODE_DEFAULT;
struct semaphore nv_linux_devices_lock;
static NvTristate nv_chipset_is_io_coherent = NV_TRISTATE_INDETERMINATE;
// True if all the successfully probed devices support ATS
// Assigned at device probe (module init) time
NvBool nv_ats_supported = NVCPU_IS_PPC64LE
;
// allow an easy way to convert all debug printfs related to events
// back and forth between 'info' and 'errors'
#if defined(NV_DBG_EVENTS)
#define NV_DBG_EVENTINFO NV_DBG_ERRORS
#else
#define NV_DBG_EVENTINFO NV_DBG_INFO
#endif
#if defined(HDA_MAX_CODECS)
#define NV_HDA_MAX_CODECS HDA_MAX_CODECS
#else
#define NV_HDA_MAX_CODECS 8
#endif
/***
*** STATIC functions, only in this file
***/
/* nvos_ functions.. do not take a state device parameter */
static int nvos_count_devices(void);
static nv_alloc_t *nvos_create_alloc(struct device *, int);
static int nvos_free_alloc(nv_alloc_t *);
/***
*** EXPORTS to Linux Kernel
***/
static irqreturn_t nvidia_isr_common_bh (void *);
static void nvidia_isr_bh_unlocked (void *);
static int nvidia_ctl_open (struct inode *, struct file *);
static int nvidia_ctl_close (struct inode *, struct file *);
const char *nv_device_name = MODULE_NAME;
static const char *nvidia_stack_cache_name = MODULE_NAME "_stack_cache";
static const char *nvidia_pte_cache_name = MODULE_NAME "_pte_cache";
static const char *nvidia_p2p_page_cache_name = MODULE_NAME "_p2p_page_cache";
static int nvidia_open (struct inode *, struct file *);
static int nvidia_close (struct inode *, struct file *);
static unsigned int nvidia_poll (struct file *, poll_table *);
static int nvidia_ioctl (struct inode *, struct file *, unsigned int, unsigned long);
/* character device entry points*/
nvidia_module_t nv_fops = {
.owner = THIS_MODULE,
.module_name = MODULE_NAME,
.instance = MODULE_INSTANCE_NUMBER,
.open = nvidia_open,
.close = nvidia_close,
.ioctl = nvidia_ioctl,
.mmap = nvidia_mmap,
.poll = nvidia_poll,
};
#if defined(CONFIG_PM)
static int nv_pmops_suspend (struct device *dev);
static int nv_pmops_resume (struct device *dev);
static int nv_pmops_freeze (struct device *dev);
static int nv_pmops_thaw (struct device *dev);
static int nv_pmops_restore (struct device *dev);
static int nv_pmops_poweroff (struct device *dev);
static int nv_pmops_runtime_suspend (struct device *dev);
static int nv_pmops_runtime_resume (struct device *dev);
struct dev_pm_ops nv_pm_ops = {
.suspend = nv_pmops_suspend,
.resume = nv_pmops_resume,
.freeze = nv_pmops_freeze,
.thaw = nv_pmops_thaw,
.poweroff = nv_pmops_poweroff,
.restore = nv_pmops_restore,
.runtime_suspend = nv_pmops_runtime_suspend,
.runtime_resume = nv_pmops_runtime_resume,
};
#endif
/***
*** see nv.h for functions exported to other parts of resman
***/
/***
*** STATIC functions
***/
#if defined(NVCPU_X86_64)
#define NV_AMD_SEV_BIT BIT(1)
static
NvBool nv_is_sev_supported(
void
)
{
unsigned int eax, ebx, ecx, edx;
/* Check for the SME/SEV support leaf */
eax = 0x80000000;
ecx = 0;
native_cpuid(&eax, &ebx, &ecx, &edx);
if (eax < 0x8000001f)
return NV_FALSE;
eax = 0x8000001f;
ecx = 0;
native_cpuid(&eax, &ebx, &ecx, &edx);
/* Check whether SEV is supported */
if (!(eax & NV_AMD_SEV_BIT))
return NV_FALSE;
return NV_TRUE;
}
#endif
static
void nv_sev_init(
void
)
{
#if defined(MSR_AMD64_SEV) && defined(NVCPU_X86_64)
NvU32 lo_val, hi_val;
if (!nv_is_sev_supported())
return;
rdmsr(MSR_AMD64_SEV, lo_val, hi_val);
os_sev_status = lo_val;
#if defined(MSR_AMD64_SEV_ENABLED)
os_sev_enabled = (os_sev_status & MSR_AMD64_SEV_ENABLED);
#endif
#endif
}
static
nv_alloc_t *nvos_create_alloc(
struct device *dev,
int num_pages
)
{
nv_alloc_t *at;
unsigned int pt_size, i;
NV_KMALLOC(at, sizeof(nv_alloc_t));
if (at == NULL)
{
nv_printf(NV_DBG_ERRORS, "NVRM: failed to allocate alloc info\n");
return NULL;
}
memset(at, 0, sizeof(nv_alloc_t));
at->dev = dev;
pt_size = num_pages * sizeof(nvidia_pte_t *);
if (os_alloc_mem((void **)&at->page_table, pt_size) != NV_OK)
{
nv_printf(NV_DBG_ERRORS, "NVRM: failed to allocate page table\n");
NV_KFREE(at, sizeof(nv_alloc_t));
return NULL;
}
memset(at->page_table, 0, pt_size);
at->num_pages = num_pages;
NV_ATOMIC_SET(at->usage_count, 0);
for (i = 0; i < at->num_pages; i++)
{
at->page_table[i] = NV_KMEM_CACHE_ALLOC(nvidia_pte_t_cache);
if (at->page_table[i] == NULL)
{
nv_printf(NV_DBG_ERRORS,
"NVRM: failed to allocate page table entry\n");
nvos_free_alloc(at);
return NULL;
}
memset(at->page_table[i], 0, sizeof(nvidia_pte_t));
}
at->pid = os_get_current_process();
return at;
}
static
int nvos_free_alloc(
nv_alloc_t *at
)
{
unsigned int i;
if (at == NULL)
return -1;
if (NV_ATOMIC_READ(at->usage_count))
return 1;
for (i = 0; i < at->num_pages; i++)
{
if (at->page_table[i] != NULL)
NV_KMEM_CACHE_FREE(at->page_table[i], nvidia_pte_t_cache);
}
os_free_mem(at->page_table);
NV_KFREE(at, sizeof(nv_alloc_t));
return 0;
}
static void
nv_module_resources_exit(nv_stack_t *sp)
{
nv_kmem_cache_free_stack(sp);
NV_KMEM_CACHE_DESTROY(nvidia_p2p_page_t_cache);
NV_KMEM_CACHE_DESTROY(nvidia_pte_t_cache);
NV_KMEM_CACHE_DESTROY(nvidia_stack_t_cache);
}
static int __init
nv_module_resources_init(nv_stack_t **sp)
{
int rc = -ENOMEM;
nvidia_stack_t_cache = NV_KMEM_CACHE_CREATE(nvidia_stack_cache_name,
nvidia_stack_t);
if (nvidia_stack_t_cache == NULL)
{
nv_printf(NV_DBG_ERRORS,
"NVRM: nvidia_stack_t cache allocation failed.\n");
goto exit;
}
nvidia_pte_t_cache = NV_KMEM_CACHE_CREATE(nvidia_pte_cache_name,
nvidia_pte_t);
if (nvidia_pte_t_cache == NULL)
{
nv_printf(NV_DBG_ERRORS,
"NVRM: nvidia_pte_t cache allocation failed.\n");
goto exit;
}
nvidia_p2p_page_t_cache = NV_KMEM_CACHE_CREATE(nvidia_p2p_page_cache_name,
nvidia_p2p_page_t);
if (nvidia_p2p_page_t_cache == NULL)
{
nv_printf(NV_DBG_ERRORS,
"NVRM: nvidia_p2p_page_t cache allocation failed.\n");
goto exit;
}
rc = nv_kmem_cache_alloc_stack(sp);
if (rc < 0)
{
goto exit;
}
exit:
if (rc < 0)
{
nv_kmem_cache_free_stack(*sp);
NV_KMEM_CACHE_DESTROY(nvidia_p2p_page_t_cache);
NV_KMEM_CACHE_DESTROY(nvidia_pte_t_cache);
NV_KMEM_CACHE_DESTROY(nvidia_stack_t_cache);
}
return rc;
}
static void
nvlink_drivers_exit(void)
{
#if NVCPU_IS_64_BITS
nvswitch_exit();
#endif
#if defined(NVCPU_PPC64LE)
ibmnpu_exit();
#endif
nvlink_core_exit();
}
static int __init
nvlink_drivers_init(void)
{
int rc = 0;
rc = nvlink_core_init();
if (rc < 0)
{
nv_printf(NV_DBG_INFO, "NVRM: NVLink core init failed.\n");
return rc;
}
#if defined(NVCPU_PPC64LE)
rc = ibmnpu_init();
if (rc < 0)
{
nv_printf(NV_DBG_INFO, "NVRM: IBM NPU init failed.\n");
nvlink_core_exit();
return rc;
}
#endif
#if NVCPU_IS_64_BITS
rc = nvswitch_init();
if (rc < 0)
{
nv_printf(NV_DBG_INFO, "NVRM: NVSwitch init failed.\n");
#if defined(NVCPU_PPC64LE)
ibmnpu_exit();
#endif
nvlink_core_exit();
}
#endif
return rc;
}
static void
nv_module_state_exit(nv_stack_t *sp)
{
nv_state_t *nv = NV_STATE_PTR(&nv_ctl_device);
nv_teardown_pat_support();
nv_kthread_q_stop(&nv_deferred_close_kthread_q);
nv_kthread_q_stop(&nv_kthread_q);
nv_lock_destroy_locks(sp, nv);
}
static int
nv_module_state_init(nv_stack_t *sp)
{
int rc;
nv_state_t *nv = NV_STATE_PTR(&nv_ctl_device);
nv->os_state = (void *)&nv_ctl_device;
if (!nv_lock_init_locks(sp, nv))
{
return -ENOMEM;
}
rc = nv_kthread_q_init(&nv_kthread_q, "nv_queue");
if (rc != 0)
{
goto exit;
}
rc = nv_kthread_q_init(&nv_deferred_close_kthread_q, "nv_queue");
if (rc != 0)
{
nv_kthread_q_stop(&nv_kthread_q);
goto exit;
}
rc = nv_init_pat_support(sp);
if (rc < 0)
{
nv_kthread_q_stop(&nv_deferred_close_kthread_q);
nv_kthread_q_stop(&nv_kthread_q);
goto exit;
}
nv_linux_devices = NULL;
NV_INIT_MUTEX(&nv_linux_devices_lock);
init_rwsem(&nv_system_pm_lock);
#if defined(CONFIG_PM)
NV_INIT_MUTEX(&nv_system_power_state_lock);
nv_system_power_state = NV_POWER_STATE_RUNNING;
nv_system_pm_action_depth = NV_PM_ACTION_DEPTH_DEFAULT;
#endif
NV_SPIN_LOCK_INIT(&nv_ctl_device.snapshot_timer_lock);
exit:
if (rc < 0)
{
nv_lock_destroy_locks(sp, nv);
}
return rc;
}
static void __init
nv_registry_keys_init(nv_stack_t *sp)
{
NV_STATUS status;
nv_state_t *nv = NV_STATE_PTR(&nv_ctl_device);
NvU32 data;
/*
* Determine the TCE bypass mode here so it can be used during
* device probe. Also determine whether we should allow
* user-mode NUMA onlining of device memory.
*/
if (NVCPU_IS_PPC64LE)
{
status = rm_read_registry_dword(sp, nv,
NV_REG_TCE_BYPASS_MODE,
&data);
if ((status == NV_OK) && ((int)data != NV_TCE_BYPASS_MODE_DEFAULT))
{
nv_tce_bypass_mode = data;
}
if (NVreg_EnableUserNUMAManagement)
{
/* Force on the core RM registry key to match. */
status = rm_write_registry_dword(sp, nv, "RMNumaOnlining", 1);
WARN_ON(status != NV_OK);
}
}
status = rm_read_registry_dword(sp, nv, NV_DMA_REMAP_PEER_MMIO, &data);
if (status == NV_OK)
{
nv_dma_remap_peer_mmio = data;
}
}
static void __init
nv_report_applied_patches(void)
{
unsigned i;
for (i = 0; __nv_patches[i].short_description; i++)
{
if (i == 0)
{
nv_printf(NV_DBG_ERRORS, "NVRM: Applied patches:\n");
}
nv_printf(NV_DBG_ERRORS,
"NVRM: Patch #%d: %s\n", i + 1, __nv_patches[i].short_description);
}
}
static void
nv_drivers_exit(void)
{
nv_pci_unregister_driver();
nvidia_unregister_module(&nv_fops);
}
static int __init
nv_drivers_init(void)
{
int rc;
rc = nvidia_register_module(&nv_fops);
if (rc < 0)
{
nv_printf(NV_DBG_ERRORS,
"NVRM: failed to register character device.\n");
return rc;
}
rc = nv_pci_register_driver();
if (rc < 0)
{
nv_printf(NV_DBG_ERRORS, "NVRM: No NVIDIA PCI devices found.\n");
rc = -ENODEV;
goto exit;
}
exit:
if (rc < 0)
{
nvidia_unregister_module(&nv_fops);
}
return rc;
}
static void
nv_module_exit(nv_stack_t *sp)
{
nv_module_state_exit(sp);
rm_shutdown_rm(sp);
nv_destroy_rsync_info();
nvlink_drivers_exit();
nv_cap_drv_exit();
nv_module_resources_exit(sp);
}
static int __init
nv_module_init(nv_stack_t **sp)
{
int rc;
rc = nv_module_resources_init(sp);
if (rc < 0)
{
return rc;
}
rc = nv_cap_drv_init();
if (rc < 0)
{
nv_printf(NV_DBG_ERRORS, "NVRM: nv-cap-drv init failed.\n");
goto cap_drv_exit;
}
rc = nvlink_drivers_init();
if (rc < 0)
{
goto cap_drv_exit;
}
nv_init_rsync_info();
nv_sev_init();
if (!rm_init_rm(*sp))
{
nv_printf(NV_DBG_ERRORS, "NVRM: rm_init_rm() failed!\n");
rc = -EIO;
goto nvlink_exit;
}
rc = nv_module_state_init(*sp);
if (rc < 0)
{
goto init_rm_exit;
}
return rc;
init_rm_exit:
rm_shutdown_rm(*sp);
nvlink_exit:
nv_destroy_rsync_info();
nvlink_drivers_exit();
cap_drv_exit:
nv_cap_drv_exit();
nv_module_resources_exit(*sp);
return rc;
}
/*
* In this function we check for the cases where GPU exclusion is not
* honored, and issue a warning.
*
* Only GPUs that support a mechanism to query UUID prior to
* initializing the GPU can be excluded, so that we can detect and
* exclude them during device probe. This function checks that an
* initialized GPU was not specified in the exclusion list, and issues a
* warning if so.
*/
static void
nv_assert_not_in_gpu_exclusion_list(
nvidia_stack_t *sp,
nv_state_t *nv
)
{
char *uuid = rm_get_gpu_uuid(sp, nv);
if (uuid == NULL)
{
NV_DEV_PRINTF(NV_DBG_INFO, nv, "Unable to read UUID");
return;
}
if (nv_is_uuid_in_gpu_exclusion_list(uuid))
{
NV_DEV_PRINTF(NV_DBG_WARNINGS, nv,
"Could not exclude GPU %s because PBI is not supported\n",
uuid);
WARN_ON(1);
}
os_free_mem(uuid);
return;
}
static int __init nv_caps_root_init(void)
{
nvidia_caps_root = os_nv_cap_init("driver/" MODULE_NAME);
return (nvidia_caps_root == NULL) ? -ENOENT : 0;
}
static void nv_caps_root_exit(void)
{
os_nv_cap_destroy_entry(nvidia_caps_root);
nvidia_caps_root = NULL;
}
int __init nvidia_init_module(void)
{
int rc;
NvU32 count;
nvidia_stack_t *sp = NULL;
const NvBool is_nvswitch_present = os_is_nvswitch_present();
nv_memdbg_init();
rc = nv_procfs_init();
if (rc < 0)
{
nv_printf(NV_DBG_ERRORS, "NVRM: failed to initialize procfs.\n");
return rc;
}
rc = nv_caps_root_init();
if (rc < 0)
{
nv_printf(NV_DBG_ERRORS, "NVRM: failed to initialize capabilities.\n");
goto procfs_exit;
}
rc = nv_module_init(&sp);
if (rc < 0)
{
nv_printf(NV_DBG_ERRORS, "NVRM: failed to initialize module.\n");
goto caps_root_exit;
}
count = nvos_count_devices();
if ((count == 0) && (!is_nvswitch_present))
{
nv_printf(NV_DBG_ERRORS, "NVRM: No NVIDIA GPU found.\n");
rc = -ENODEV;
goto module_exit;
}
rc = nv_drivers_init();
if (rc < 0)
{
goto module_exit;
}
if (num_probed_nv_devices != count)
{
nv_printf(NV_DBG_ERRORS,
"NVRM: The NVIDIA probe routine was not called for %d device(s).\n",
count - num_probed_nv_devices);
nv_printf(NV_DBG_ERRORS,
"NVRM: This can occur when a driver such as: \n"
"NVRM: nouveau, rivafb, nvidiafb or rivatv "
"\nNVRM: was loaded and obtained ownership of the NVIDIA device(s).\n");
nv_printf(NV_DBG_ERRORS,
"NVRM: Try unloading the conflicting kernel module (and/or\n"
"NVRM: reconfigure your kernel without the conflicting\n"
"NVRM: driver(s)), then try loading the NVIDIA kernel module\n"
"NVRM: again.\n");
}
if ((num_probed_nv_devices == 0) && (!is_nvswitch_present))
{
rc = -ENODEV;
nv_printf(NV_DBG_ERRORS, "NVRM: No NVIDIA devices probed.\n");
goto drivers_exit;
}
if (num_probed_nv_devices != num_nv_devices)
{
nv_printf(NV_DBG_ERRORS,
"NVRM: The NVIDIA probe routine failed for %d device(s).\n",
num_probed_nv_devices - num_nv_devices);
}
if ((num_nv_devices == 0) && (!is_nvswitch_present))
{
rc = -ENODEV;
nv_printf(NV_DBG_ERRORS,
"NVRM: None of the NVIDIA devices were initialized.\n");
goto drivers_exit;
}
/*
* Initialize registry keys after PCI driver registration has
* completed successfully to support per-device module
* parameters.
*/
nv_registry_keys_init(sp);
nv_report_applied_patches();
nv_printf(NV_DBG_ERRORS, "NVRM: loading %s\n", pNVRM_ID);
#if defined(NV_UVM_ENABLE)
rc = nv_uvm_init();
if (rc != 0)
{
goto drivers_exit;
}
#endif
__nv_init_sp = sp;
return 0;
drivers_exit:
nv_drivers_exit();
module_exit:
nv_module_exit(sp);
caps_root_exit:
nv_caps_root_exit();
procfs_exit:
nv_procfs_exit();
return rc;
}
void nvidia_exit_module(void)
{
nvidia_stack_t *sp = __nv_init_sp;
#if defined(NV_UVM_ENABLE)
nv_uvm_exit();
#endif
nv_drivers_exit();
nv_module_exit(sp);
nv_caps_root_exit();
nv_procfs_exit();
nv_memdbg_exit();
}
static void *nv_alloc_file_private(void)
{
nv_linux_file_private_t *nvlfp;
unsigned int i;
NV_KMALLOC(nvlfp, sizeof(nv_linux_file_private_t));
if (!nvlfp)
return NULL;
memset(nvlfp, 0, sizeof(nv_linux_file_private_t));
for (i = 0; i < NV_FOPS_STACK_INDEX_COUNT; ++i)
{
NV_INIT_MUTEX(&nvlfp->fops_sp_lock[i]);
}
init_waitqueue_head(&nvlfp->waitqueue);
NV_SPIN_LOCK_INIT(&nvlfp->fp_lock);
return nvlfp;
}
static void nv_free_file_private(nv_linux_file_private_t *nvlfp)
{
nvidia_event_t *nvet;
if (nvlfp == NULL)
return;
for (nvet = nvlfp->event_data_head; nvet != NULL; nvet = nvlfp->event_data_head)
{
nvlfp->event_data_head = nvlfp->event_data_head->next;
NV_KFREE(nvet, sizeof(nvidia_event_t));
}
if (nvlfp->mmap_context.page_array != NULL)
{
os_free_mem(nvlfp->mmap_context.page_array);
}
NV_KFREE(nvlfp, sizeof(nv_linux_file_private_t));
}
static int nv_is_control_device(
struct inode *inode
)
{
return (minor((inode)->i_rdev) == NV_CONTROL_DEVICE_MINOR);
}
/*
* Search the global list of nv devices for the one with the given minor device
* number. If found, nvl is returned with nvl->ldata_lock taken.
*/
static nv_linux_state_t *find_minor(NvU32 minor)
{
nv_linux_state_t *nvl;
LOCK_NV_LINUX_DEVICES();
nvl = nv_linux_devices;
while (nvl != NULL)
{
if (nvl->minor_num == minor)
{
down(&nvl->ldata_lock);
break;
}
nvl = nvl->next;
}
UNLOCK_NV_LINUX_DEVICES();
return nvl;
}
/*
* Search the global list of nv devices for the one with the given gpu_id.
* If found, nvl is returned with nvl->ldata_lock taken.
*/
static nv_linux_state_t *find_gpu_id(NvU32 gpu_id)
{
nv_linux_state_t *nvl;
LOCK_NV_LINUX_DEVICES();
nvl = nv_linux_devices;
while (nvl != NULL)
{
nv_state_t *nv = NV_STATE_PTR(nvl);
if (nv->gpu_id == gpu_id)
{
down(&nvl->ldata_lock);
break;
}
nvl = nvl->next;
}
UNLOCK_NV_LINUX_DEVICES();
return nvl;
}
/*
* Search the global list of nv devices for the one with the given UUID. Devices
* with missing UUID information are ignored. If found, nvl is returned with
* nvl->ldata_lock taken.
*/
nv_linux_state_t *find_uuid(const NvU8 *uuid)
{
nv_linux_state_t *nvl = NULL;
nv_state_t *nv;
const NvU8 *dev_uuid;
LOCK_NV_LINUX_DEVICES();
for (nvl = nv_linux_devices; nvl; nvl = nvl->next)
{
nv = NV_STATE_PTR(nvl);
down(&nvl->ldata_lock);
dev_uuid = nv_get_cached_uuid(nv);
if (dev_uuid && memcmp(dev_uuid, uuid, GPU_UUID_LEN) == 0)
goto out;
up(&nvl->ldata_lock);
}
out:
UNLOCK_NV_LINUX_DEVICES();
return nvl;
}
/*
* Search the global list of nv devices. The search logic is:
*
* 1) If any device has the given UUID, return it
*
* 2) If no device has the given UUID but at least one device is missing
* its UUID (for example because rm_init_adapter has not run on it yet),
* return that device.
*
* 3) If no device has the given UUID and all UUIDs are present, return NULL.
*
* In cases 1 and 2, nvl is returned with nvl->ldata_lock taken.
*
* The reason for this weird logic is because UUIDs aren't always available. See
* bug 1642200.
*/
static nv_linux_state_t *find_uuid_candidate(const NvU8 *uuid)
{
nv_linux_state_t *nvl = NULL;
nv_state_t *nv;
const NvU8 *dev_uuid;
int use_missing;
int has_missing = 0;
LOCK_NV_LINUX_DEVICES();
/*
* Take two passes through the list. The first pass just looks for the UUID.
* The second looks for the target or missing UUIDs. It would be nice if
* this could be done in a single pass by remembering which nvls are missing
* UUIDs, but we have to hold the nvl lock after we check for the UUID.
*/
for (use_missing = 0; use_missing <= 1; use_missing++)
{
for (nvl = nv_linux_devices; nvl; nvl = nvl->next)
{
nv = NV_STATE_PTR(nvl);
down(&nvl->ldata_lock);
dev_uuid = nv_get_cached_uuid(nv);
if (dev_uuid)
{
/* Case 1: If a device has the given UUID, return it */
if (memcmp(dev_uuid, uuid, GPU_UUID_LEN) == 0)
goto out;
}
else
{
/* Case 2: If no device has the given UUID but at least one
* device is missing its UUID, return that device. */
if (use_missing)
goto out;
has_missing = 1;
}
up(&nvl->ldata_lock);
}
/* Case 3: If no device has the given UUID and all UUIDs are present,
* return NULL. */
if (!has_missing)
break;
}
out:
UNLOCK_NV_LINUX_DEVICES();
return nvl;
}
void nv_dev_free_stacks(nv_linux_state_t *nvl)
{
NvU32 i;
for (i = 0; i < NV_DEV_STACK_COUNT; i++)
{
if (nvl->sp[i])
{
nv_kmem_cache_free_stack(nvl->sp[i]);
nvl->sp[i] = NULL;
}
}
}
static int nv_dev_alloc_stacks(nv_linux_state_t *nvl)
{
NvU32 i;
int rc;
for (i = 0; i < NV_DEV_STACK_COUNT; i++)
{
rc = nv_kmem_cache_alloc_stack(&nvl->sp[i]);
if (rc != 0)
{
nv_dev_free_stacks(nvl);
return rc;
}
}
return 0;
}
static int validate_numa_start_state(nv_linux_state_t *nvl)
{
int rc = 0;
int numa_status = nv_get_numa_status(nvl);
if (numa_status != NV_IOCTL_NUMA_STATUS_DISABLED)
{
if (nv_ctl_device.numa_memblock_size == 0)
{
nv_printf(NV_DBG_ERRORS, "NVRM: numa memblock size of zero "
"found during device start");
rc = -EINVAL;
}
else
{
/* Keep the individual devices consistent with the control device */
nvl->numa_memblock_size = nv_ctl_device.numa_memblock_size;
}
}
return rc;
}
NV_STATUS NV_API_CALL nv_get_num_dpaux_instances(nv_state_t *nv, NvU32 *num_instances)
{
*num_instances = nv->num_dpaux_instance;
return NV_OK;
}
void NV_API_CALL
nv_schedule_uvm_isr(nv_state_t *nv)
{
#if defined(NV_UVM_ENABLE)
nv_uvm_event_interrupt(nv_get_cached_uuid(nv));
#endif
}
/*
* Brings up the device on the first file open. Assumes nvl->ldata_lock is held.
*/
static int nv_start_device(nv_state_t *nv, nvidia_stack_t *sp)
{
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
#if defined(NV_LINUX_PCIE_MSI_SUPPORTED)
NvU32 msi_config = 0;
#endif
int rc = 0;
NvBool kthread_init = NV_FALSE;
NvBool power_ref = NV_FALSE;
rc = nv_get_rsync_info();
if (rc != 0)
{
return rc;
}
rc = validate_numa_start_state(nvl);
if (rc != 0)
{
goto failed;
}
if (nv_dev_is_pci(nvl->dev) && (nv->pci_info.device_id == 0))
{
nv_printf(NV_DBG_ERRORS, "NVRM: open of non-existent GPU with minor number %d\n", nvl->minor_num);
rc = -ENXIO;
goto failed;
}
if (!(nv->flags & NV_FLAG_PERSISTENT_SW_STATE))
{
if (rm_ref_dynamic_power(sp, nv, NV_DYNAMIC_PM_COARSE) != NV_OK)
{
rc = -EINVAL;
goto failed;
}
power_ref = NV_TRUE;
}
else
{
if (rm_ref_dynamic_power(sp, nv, NV_DYNAMIC_PM_FINE) != NV_OK)
{
rc = -EINVAL;
goto failed;
}
power_ref = NV_TRUE;
}
rc = nv_init_ibmnpu_devices(nv);
if (rc != 0)
{
nv_printf(NV_DBG_ERRORS,
"NVRM: failed to initialize ibmnpu devices attached to GPU with minor number %d\n",
nvl->minor_num);
goto failed;
}
if (!(nv->flags & NV_FLAG_PERSISTENT_SW_STATE))
{
rc = nv_dev_alloc_stacks(nvl);
if (rc != 0)
goto failed;
}
#if defined(NV_LINUX_PCIE_MSI_SUPPORTED)
if (nv_dev_is_pci(nvl->dev))
{
if (!(nv->flags & NV_FLAG_PERSISTENT_SW_STATE))
{
rm_read_registry_dword(sp, nv, NV_REG_ENABLE_MSI, &msi_config);
if (msi_config == 1)
{
if (pci_find_capability(nvl->pci_dev, PCI_CAP_ID_MSIX))
{
nv_init_msix(nv);
}
if (pci_find_capability(nvl->pci_dev, PCI_CAP_ID_MSI) &&
!(nv->flags & NV_FLAG_USES_MSIX))
{
nv_init_msi(nv);
}
}
}
}
#endif
if (((!(nv->flags & NV_FLAG_USES_MSI)) && (!(nv->flags & NV_FLAG_USES_MSIX)))
&& (nv->interrupt_line == 0) && !(nv->flags & NV_FLAG_SOC_DISPLAY))
{
NV_DEV_PRINTF(NV_DBG_ERRORS, nv,
"No interrupts of any type are available. Cannot use this GPU.\n");
rc = -EIO;
goto failed;
}
rc = 0;
if (!(nv->flags & NV_FLAG_PERSISTENT_SW_STATE))
{
if (nv->flags & NV_FLAG_SOC_DISPLAY)
{
}
else if (!(nv->flags & NV_FLAG_USES_MSIX))
{
rc = request_threaded_irq(nv->interrupt_line, nvidia_isr,
nvidia_isr_kthread_bh, nv_default_irq_flags(nv),
nv_device_name, (void *)nvl);
}
#if defined(NV_LINUX_PCIE_MSI_SUPPORTED)
else
{
rc = nv_request_msix_irq(nvl);
}
#endif
}
if (rc != 0)
{
if ((nv->interrupt_line != 0) && (rc == -EBUSY))
{
NV_DEV_PRINTF(NV_DBG_ERRORS, nv,
"Tried to get IRQ %d, but another driver\n",
(unsigned int) nv->interrupt_line);
nv_printf(NV_DBG_ERRORS, "NVRM: has it and is not sharing it.\n");
nv_printf(NV_DBG_ERRORS, "NVRM: You may want to verify that no audio driver");
nv_printf(NV_DBG_ERRORS, " is using the IRQ.\n");
}
NV_DEV_PRINTF(NV_DBG_ERRORS, nv, "request_irq() failed (%d)\n", rc);
goto failed;
}
if (!(nv->flags & NV_FLAG_PERSISTENT_SW_STATE))
{
rc = os_alloc_mutex(&nvl->isr_bh_unlocked_mutex);
if (rc != 0)
goto failed;
nv_kthread_q_item_init(&nvl->bottom_half_q_item, nvidia_isr_bh_unlocked, (void *)nv);
rc = nv_kthread_q_init(&nvl->bottom_half_q, nv_device_name);
if (rc != 0)
goto failed;
kthread_init = NV_TRUE;
rc = nv_kthread_q_init(&nvl->queue.nvk, "nv_queue");
if (rc)
goto failed;
nv->queue = &nvl->queue;
}
if (!rm_init_adapter(sp, nv))
{
if (!(nv->flags & NV_FLAG_USES_MSIX) &&
!(nv->flags & NV_FLAG_SOC_DISPLAY))
{
free_irq(nv->interrupt_line, (void *) nvl);
}
else if (nv->flags & NV_FLAG_SOC_DISPLAY)
{
}
#if defined(NV_LINUX_PCIE_MSI_SUPPORTED)
else
{
nv_free_msix_irq(nvl);
}
#endif
NV_DEV_PRINTF(NV_DBG_ERRORS, nv,
"rm_init_adapter failed, device minor number %d\n",
nvl->minor_num);
rc = -EIO;
goto failed;
}
{
const NvU8 *uuid = rm_get_gpu_uuid_raw(sp, nv);
if (uuid != NULL)
{
#if defined(NV_UVM_ENABLE)
nv_uvm_notify_start_device(uuid);
#endif
}
}
if (!(nv->flags & NV_FLAG_PERSISTENT_SW_STATE))
{
nv_acpi_register_notifier(nvl);
}
nv->flags |= NV_FLAG_OPEN;
/*
* Now that RM init is done, allow dynamic power to control the GPU in FINE
* mode, if enabled. (If the mode is COARSE, this unref will do nothing
* which will cause the GPU to remain powered up.)
* This is balanced by a FINE ref increment at the beginning of
* nv_stop_device().
*/
rm_unref_dynamic_power(sp, nv, NV_DYNAMIC_PM_FINE);
return 0;
failed:
#if defined(NV_LINUX_PCIE_MSI_SUPPORTED)
if (nv->flags & NV_FLAG_USES_MSI)
{
nv->flags &= ~NV_FLAG_USES_MSI;
NV_PCI_DISABLE_MSI(nvl->pci_dev);
if(nvl->irq_count)
NV_KFREE(nvl->irq_count, nvl->num_intr * sizeof(nv_irq_count_info_t));
}
if (nv->flags & NV_FLAG_USES_MSIX)
{
nv->flags &= ~NV_FLAG_USES_MSIX;
pci_disable_msix(nvl->pci_dev);
NV_KFREE(nvl->irq_count, nvl->num_intr*sizeof(nv_irq_count_info_t));
NV_KFREE(nvl->msix_entries, nvl->num_intr*sizeof(struct msix_entry));
}
if (nvl->msix_bh_mutex)
{
os_free_mutex(nvl->msix_bh_mutex);
nvl->msix_bh_mutex = NULL;
}
#endif
if (nv->queue && !(nv->flags & NV_FLAG_PERSISTENT_SW_STATE))
{
nv->queue = NULL;
nv_kthread_q_stop(&nvl->queue.nvk);
}
if (kthread_init && !(nv->flags & NV_FLAG_PERSISTENT_SW_STATE))
nv_kthread_q_stop(&nvl->bottom_half_q);
if (nvl->isr_bh_unlocked_mutex)
{
os_free_mutex(nvl->isr_bh_unlocked_mutex);
nvl->isr_bh_unlocked_mutex = NULL;
}
nv_dev_free_stacks(nvl);
nv_unregister_ibmnpu_devices(nv);
if (power_ref)
{
rm_unref_dynamic_power(sp, nv, NV_DYNAMIC_PM_COARSE);
}
nv_put_rsync_info();
return rc;
}
/*
* Makes sure the device is ready for operations and increases nvl->usage_count.
* Assumes nvl->ldata_lock is held.
*/
static int nv_open_device(nv_state_t *nv, nvidia_stack_t *sp)
{
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
int rc;
NV_STATUS status;
if (os_is_vgx_hyper())
{
/* fail open if GPU is being unbound */
if (nv->flags & NV_FLAG_UNBIND_LOCK)
{
NV_DEV_PRINTF(NV_DBG_ERRORS, nv,
"Open failed as GPU is locked for unbind operation\n");
return -ENODEV;
}
}
NV_DEV_PRINTF(NV_DBG_INFO, nv, "Opening GPU with minor number %d\n",
nvl->minor_num);
status = nv_check_gpu_state(nv);
if (status == NV_ERR_GPU_IS_LOST)
{
NV_DEV_PRINTF(NV_DBG_INFO, nv, "Device in removal process\n");
return -ENODEV;
}
if (unlikely(NV_ATOMIC_READ(nvl->usage_count) >= NV_S32_MAX))
return -EMFILE;
if ( ! (nv->flags & NV_FLAG_OPEN))
{
/* Sanity check: !NV_FLAG_OPEN requires usage_count == 0 */
if (NV_ATOMIC_READ(nvl->usage_count) != 0)
{
NV_DEV_PRINTF(NV_DBG_ERRORS, nv,
"Minor device %u is referenced without being open!\n",
nvl->minor_num);
WARN_ON(1);
return -EBUSY;
}
rc = nv_start_device(nv, sp);
if (rc != 0)
return rc;
}
else if (rm_is_device_sequestered(sp, nv))
{
/* Do not increment the usage count of sequestered devices. */
NV_DEV_PRINTF(NV_DBG_ERRORS, nv, "Device is currently unavailable\n");
return -EBUSY;
}
NV_ATOMIC_INC(nvl->usage_count);
return 0;
}
static void nv_init_mapping_revocation(nv_linux_state_t *nvl,
struct file *file,
nv_linux_file_private_t *nvlfp,
struct inode *inode)
{
down(&nvl->mmap_lock);
/* Set up struct address_space for use with unmap_mapping_range() */
nv_address_space_init_once(&nvlfp->mapping);
nvlfp->mapping.host = inode;
nvlfp->mapping.a_ops = inode->i_mapping->a_ops;
#if defined(NV_ADDRESS_SPACE_HAS_BACKING_DEV_INFO)
nvlfp->mapping.backing_dev_info = inode->i_mapping->backing_dev_info;
#endif
file->f_mapping = &nvlfp->mapping;
/* Add nvlfp to list of open files in nvl for mapping revocation */
list_add(&nvlfp->entry, &nvl->open_files);
up(&nvl->mmap_lock);
}
/*
** nvidia_open
**
** nv driver open entry point. Sessions are created here.
*/
int
nvidia_open(
struct inode *inode,
struct file *file
)
{
nv_state_t *nv = NULL;
nv_linux_state_t *nvl = NULL;
int rc = 0;
nv_linux_file_private_t *nvlfp = NULL;
nvidia_stack_t *sp = NULL;
unsigned int i;
unsigned int k;
nv_printf(NV_DBG_INFO, "NVRM: nvidia_open...\n");
nvlfp = nv_alloc_file_private();
if (nvlfp == NULL)
{
nv_printf(NV_DBG_ERRORS, "NVRM: failed to allocate file private!\n");
return -ENOMEM;
}
rc = nv_kmem_cache_alloc_stack(&sp);
if (rc != 0)
{
nv_free_file_private(nvlfp);
return rc;
}
for (i = 0; i < NV_FOPS_STACK_INDEX_COUNT; ++i)
{
rc = nv_kmem_cache_alloc_stack(&nvlfp->fops_sp[i]);
if (rc != 0)
{
nv_kmem_cache_free_stack(sp);
for (k = 0; k < i; ++k)
{
nv_kmem_cache_free_stack(nvlfp->fops_sp[k]);
}
nv_free_file_private(nvlfp);
return rc;
}
}
NV_SET_FILE_PRIVATE(file, nvlfp);
nvlfp->sp = sp;
/* for control device, just jump to its open routine */
/* after setting up the private data */
if (nv_is_control_device(inode))
{
rc = nvidia_ctl_open(inode, file);
if (rc != 0)
goto failed;
return rc;
}
rc = nv_down_read_interruptible(&nv_system_pm_lock);
if (rc < 0)
goto failed;
/* Takes nvl->ldata_lock */
nvl = find_minor(NV_DEVICE_MINOR_NUMBER(inode));
if (!nvl)
{
rc = -ENODEV;
up_read(&nv_system_pm_lock);
goto failed;
}
nvlfp->nvptr = nvl;
nv = NV_STATE_PTR(nvl);
if ((nv->flags & NV_FLAG_EXCLUDE) != 0)
{
char *uuid = rm_get_gpu_uuid(sp, nv);
NV_DEV_PRINTF(NV_DBG_ERRORS, nv,
"open() not permitted for excluded %s\n",
(uuid != NULL) ? uuid : "GPU");
if (uuid != NULL)
os_free_mem(uuid);
rc = -EPERM;
goto failed1;
}
rc = nv_open_device(nv, sp);
/* Fall-through on error */
nv_assert_not_in_gpu_exclusion_list(sp, nv);
failed1:
up(&nvl->ldata_lock);
up_read(&nv_system_pm_lock);
failed:
if (rc != 0)
{
if (nvlfp != NULL)
{
nv_kmem_cache_free_stack(sp);
for (i = 0; i < NV_FOPS_STACK_INDEX_COUNT; ++i)
{
nv_kmem_cache_free_stack(nvlfp->fops_sp[i]);
}
nv_free_file_private(nvlfp);
NV_SET_FILE_PRIVATE(file, NULL);
}
}
else
{
nv_init_mapping_revocation(nvl, file, nvlfp, inode);
}
return rc;
}
static void validate_numa_shutdown_state(nv_linux_state_t *nvl)
{
int numa_status = nv_get_numa_status(nvl);
WARN_ON((numa_status != NV_IOCTL_NUMA_STATUS_OFFLINE) &&
(numa_status != NV_IOCTL_NUMA_STATUS_DISABLED));
}
void nv_shutdown_adapter(nvidia_stack_t *sp,
nv_state_t *nv,
nv_linux_state_t *nvl)
{
validate_numa_shutdown_state(nvl);
rm_disable_adapter(sp, nv);
// It's safe to call nv_kthread_q_stop even if queue is not initialized
nv_kthread_q_stop(&nvl->bottom_half_q);
if (nv->queue != NULL)
{
nv->queue = NULL;
nv_kthread_q_stop(&nvl->queue.nvk);
}
if (nvl->isr_bh_unlocked_mutex)
{
os_free_mutex(nvl->isr_bh_unlocked_mutex);
nvl->isr_bh_unlocked_mutex = NULL;
}
if (!(nv->flags & NV_FLAG_USES_MSIX) &&
!(nv->flags & NV_FLAG_SOC_DISPLAY))
{
free_irq(nv->interrupt_line, (void *)nvl);
if (nv->flags & NV_FLAG_USES_MSI)
{
NV_PCI_DISABLE_MSI(nvl->pci_dev);
if(nvl->irq_count)
NV_KFREE(nvl->irq_count, nvl->num_intr * sizeof(nv_irq_count_info_t));
}
}
else if (nv->flags & NV_FLAG_SOC_DISPLAY)
{
}
#if defined(NV_LINUX_PCIE_MSI_SUPPORTED)
else
{
nv_free_msix_irq(nvl);
pci_disable_msix(nvl->pci_dev);
nv->flags &= ~NV_FLAG_USES_MSIX;
NV_KFREE(nvl->msix_entries, nvl->num_intr*sizeof(struct msix_entry));
NV_KFREE(nvl->irq_count, nvl->num_intr*sizeof(nv_irq_count_info_t));
}
#endif
if (nvl->msix_bh_mutex)
{
os_free_mutex(nvl->msix_bh_mutex);
nvl->msix_bh_mutex = NULL;
}
rm_shutdown_adapter(sp, nv);
}
/*
* Tears down the device on the last file close. Assumes nvl->ldata_lock is
* held.
*/
static void nv_stop_device(nv_state_t *nv, nvidia_stack_t *sp)
{
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
static int persistence_mode_notice_logged;
/*
* The GPU needs to be powered on to go through the teardown sequence.
* This balances the FINE unref at the end of nv_start_device().
*/
rm_ref_dynamic_power(sp, nv, NV_DYNAMIC_PM_FINE);
#if defined(NV_UVM_ENABLE)
{
const NvU8* uuid;
// Inform UVM before disabling adapter. Use cached copy
uuid = nv_get_cached_uuid(nv);
if (uuid != NULL)
{
// this function cannot fail
nv_uvm_notify_stop_device(uuid);
}
}
#endif
/* Adapter is already shutdown as part of nvidia_pci_remove */
if (!nv->removed)
{
if (nv->flags & NV_FLAG_PERSISTENT_SW_STATE)
{
rm_disable_adapter(sp, nv);
}
else
{
nv_acpi_unregister_notifier(nvl);
nv_shutdown_adapter(sp, nv, nvl);
}
}
if (!(nv->flags & NV_FLAG_PERSISTENT_SW_STATE))
{
nv_dev_free_stacks(nvl);
}
if ((nv->flags & NV_FLAG_PERSISTENT_SW_STATE) &&
(!persistence_mode_notice_logged) && (!os_is_vgx_hyper()))
{
nv_printf(NV_DBG_ERRORS, "NVRM: Persistence mode is deprecated and"
" will be removed in a future release. Please use"
" nvidia-persistenced instead.\n");
persistence_mode_notice_logged = 1;
}
/* leave INIT flag alone so we don't reinit every time */
nv->flags &= ~NV_FLAG_OPEN;
nv_unregister_ibmnpu_devices(nv);
if (!(nv->flags & NV_FLAG_PERSISTENT_SW_STATE))
{
rm_unref_dynamic_power(sp, nv, NV_DYNAMIC_PM_COARSE);
}
else
{
/* If in legacy persistence mode, only unref FINE refcount. */
rm_unref_dynamic_power(sp, nv, NV_DYNAMIC_PM_FINE);
}
nv_put_rsync_info();
}
/*
* Decreases nvl->usage_count, stopping the device when it reaches 0. Assumes
* nvl->ldata_lock is held.
*/
static void nv_close_device(nv_state_t *nv, nvidia_stack_t *sp)
{
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
if (NV_ATOMIC_READ(nvl->usage_count) == 0)
{
nv_printf(NV_DBG_ERRORS,
"NVRM: Attempting to close unopened minor device %u!\n",
nvl->minor_num);
WARN_ON(1);
return;
}
if (NV_ATOMIC_DEC_AND_TEST(nvl->usage_count))
nv_stop_device(nv, sp);
}
/*
** nvidia_close
**
** Primary driver close entry point.
*/
static void
nvidia_close_callback(
nv_linux_file_private_t *nvlfp
)
{
nv_linux_state_t *nvl = nvlfp->nvptr;
nv_state_t *nv = NV_STATE_PTR(nvl);
nvidia_stack_t *sp = nvlfp->sp;
unsigned int i;
NvBool bRemove = NV_FALSE;
rm_cleanup_file_private(sp, nv, &nvlfp->nvfp);
down(&nvl->mmap_lock);
list_del(&nvlfp->entry);
up(&nvl->mmap_lock);
down(&nvl->ldata_lock);
nv_close_device(nv, sp);
bRemove = (!NV_IS_DEVICE_IN_SURPRISE_REMOVAL(nv)) &&
(NV_ATOMIC_READ(nvl->usage_count) == 0) &&
rm_get_device_remove_flag(sp, nv->gpu_id);
for (i = 0; i < NV_FOPS_STACK_INDEX_COUNT; ++i)
{
nv_kmem_cache_free_stack(nvlfp->fops_sp[i]);
}
nv_free_file_private(nvlfp);
/*
* In case of surprise removal of device, we have 2 cases as below:
*
* 1> When nvidia_pci_remove is scheduled prior to nvidia_close.
* nvidia_pci_remove will not destroy linux layer locks & nv linux state
* struct but will set variable nv->removed for nvidia_close.
* Once all the clients are closed, last nvidia_close will clean up linux
* layer locks and nv linux state struct.
*
* 2> When nvidia_close is scheduled prior to nvidia_pci_remove.
* This will be treated as normal working case. nvidia_close will not do
* any cleanup related to linux layer locks and nv linux state struct.
* nvidia_pci_remove when scheduled will do necessary cleanup.
*/
if ((NV_ATOMIC_READ(nvl->usage_count) == 0) && nv->removed)
{
nvidia_frontend_remove_device((void *)&nv_fops, nvl);
nv_lock_destroy_locks(sp, nv);
NV_KFREE(nvl, sizeof(nv_linux_state_t));
}
else
{
up(&nvl->ldata_lock);
#if defined(NV_PCI_STOP_AND_REMOVE_BUS_DEVICE)
if (bRemove)
{
NV_PCI_STOP_AND_REMOVE_BUS_DEVICE(nvl->pci_dev);
}
#endif
}
nv_kmem_cache_free_stack(sp);
}
static void nvidia_close_deferred(void *data)
{
nv_linux_file_private_t *nvlfp = data;
down_read(&nv_system_pm_lock);
nvidia_close_callback(nvlfp);
up_read(&nv_system_pm_lock);
}
int
nvidia_close(
struct inode *inode,
struct file *file
)
{
int rc;
nv_linux_file_private_t *nvlfp = NV_GET_LINUX_FILE_PRIVATE(file);
nv_linux_state_t *nvl = nvlfp->nvptr;
nv_state_t *nv = NV_STATE_PTR(nvl);
NV_DEV_PRINTF(NV_DBG_INFO, nv, "nvidia_close on GPU with minor number %d\n", NV_DEVICE_MINOR_NUMBER(inode));
if (nv_is_control_device(inode))
{
return nvidia_ctl_close(inode, file);
}
NV_SET_FILE_PRIVATE(file, NULL);
rc = nv_down_read_interruptible(&nv_system_pm_lock);
if (rc == 0)
{
nvidia_close_callback(nvlfp);
up_read(&nv_system_pm_lock);
}
else
{
nv_kthread_q_item_init(&nvlfp->deferred_close_q_item,
nvidia_close_deferred,
nvlfp);
rc = nv_kthread_q_schedule_q_item(&nv_deferred_close_kthread_q,
&nvlfp->deferred_close_q_item);
WARN_ON(rc == 0);
}
return 0;
}
unsigned int
nvidia_poll(
struct file *file,
poll_table *wait
)
{
unsigned int mask = 0;
nv_linux_file_private_t *nvlfp = NV_GET_LINUX_FILE_PRIVATE(file);
unsigned long eflags;
nv_linux_state_t *nvl = NV_GET_NVL_FROM_FILEP(file);
nv_state_t *nv = NV_STATE_PTR(nvl);
NV_STATUS status;
status = nv_check_gpu_state(nv);
if (status == NV_ERR_GPU_IS_LOST)
{
NV_DEV_PRINTF(NV_DBG_INFO, nv, "GPU is lost, skipping nvidia_poll\n");
return POLLHUP;
}
if ((file->f_flags & O_NONBLOCK) == 0)
poll_wait(file, &nvlfp->waitqueue, wait);
NV_SPIN_LOCK_IRQSAVE(&nvlfp->fp_lock, eflags);
if ((nvlfp->event_data_head != NULL) || nvlfp->dataless_event_pending)
{
mask = (POLLPRI | POLLIN);
nvlfp->dataless_event_pending = NV_FALSE;
}
NV_SPIN_UNLOCK_IRQRESTORE(&nvlfp->fp_lock, eflags);
return mask;
}
#define NV_CTL_DEVICE_ONLY(nv) \
{ \
if (((nv)->flags & NV_FLAG_CONTROL) == 0) \
{ \
status = -EINVAL; \
goto done; \
} \
}
#define NV_ACTUAL_DEVICE_ONLY(nv) \
{ \
if (((nv)->flags & NV_FLAG_CONTROL) != 0) \
{ \
status = -EINVAL; \
goto done; \
} \
}
/*
* Fills the ci array with the state of num_entries devices. Returns -EINVAL if
* num_entries isn't big enough to hold all available devices.
*/
static int nvidia_read_card_info(nv_ioctl_card_info_t *ci, size_t num_entries)
{
nv_state_t *nv;
nv_linux_state_t *nvl;
size_t i = 0;
int rc = 0;
/* Clear each card's flags field the lazy way */
memset(ci, 0, num_entries * sizeof(ci[0]));
LOCK_NV_LINUX_DEVICES();
if (num_entries < num_nv_devices)
{
rc = -EINVAL;
goto out;
}
for (nvl = nv_linux_devices; nvl && i < num_entries; nvl = nvl->next)
{
nv = NV_STATE_PTR(nvl);
/* We do not include excluded GPUs in the list... */
if ((nv->flags & NV_FLAG_EXCLUDE) != 0)
continue;
ci[i].valid = NV_TRUE;
ci[i].pci_info.domain = nv->pci_info.domain;
ci[i].pci_info.bus = nv->pci_info.bus;
ci[i].pci_info.slot = nv->pci_info.slot;
ci[i].pci_info.vendor_id = nv->pci_info.vendor_id;
ci[i].pci_info.device_id = nv->pci_info.device_id;
ci[i].gpu_id = nv->gpu_id;
ci[i].interrupt_line = nv->interrupt_line;
ci[i].reg_address = nv->regs->cpu_address;
ci[i].reg_size = nv->regs->size;
ci[i].minor_number = nvl->minor_num;
if (nv_dev_is_pci(nvl->dev))
{
ci[i].fb_address = nv->fb->cpu_address;
ci[i].fb_size = nv->fb->size;
}
i++;
}
out:
UNLOCK_NV_LINUX_DEVICES();
return rc;
}
int
nvidia_ioctl(
struct inode *inode,
struct file *file,
unsigned int cmd,
unsigned long i_arg)
{
NV_STATUS rmStatus;
int status = 0;
nv_linux_state_t *nvl = NV_GET_NVL_FROM_FILEP(file);
nv_state_t *nv = NV_STATE_PTR(nvl);
nv_linux_file_private_t *nvlfp = NV_GET_LINUX_FILE_PRIVATE(file);
nvidia_stack_t *sp = NULL;
nv_ioctl_xfer_t ioc_xfer;
void *arg_ptr = (void *) i_arg;
void *arg_copy = NULL;
size_t arg_size = 0;
int arg_cmd;
nv_printf(NV_DBG_INFO, "NVRM: ioctl(0x%x, 0x%x, 0x%x)\n",
_IOC_NR(cmd), (unsigned int) i_arg, _IOC_SIZE(cmd));
status = nv_down_read_interruptible(&nv_system_pm_lock);
if (status < 0)
return status;
down(&nvlfp->fops_sp_lock[NV_FOPS_STACK_INDEX_IOCTL]);
sp = nvlfp->fops_sp[NV_FOPS_STACK_INDEX_IOCTL];
rmStatus = nv_check_gpu_state(nv);
if (rmStatus == NV_ERR_GPU_IS_LOST)
{
nv_printf(NV_DBG_INFO, "NVRM: GPU is lost, skipping nvidia_ioctl\n");
status = -EINVAL;
goto done;
}
arg_size = _IOC_SIZE(cmd);
arg_cmd = _IOC_NR(cmd);
if (arg_cmd == NV_ESC_IOCTL_XFER_CMD)
{
if (arg_size != sizeof(nv_ioctl_xfer_t))
{
nv_printf(NV_DBG_ERRORS,
"NVRM: invalid ioctl XFER structure size!\n");
status = -EINVAL;
goto done;
}
if (NV_COPY_FROM_USER(&ioc_xfer, arg_ptr, sizeof(ioc_xfer)))
{
nv_printf(NV_DBG_ERRORS,
"NVRM: failed to copy in ioctl XFER data!\n");
status = -EFAULT;
goto done;
}
arg_cmd = ioc_xfer.cmd;
arg_size = ioc_xfer.size;
arg_ptr = NvP64_VALUE(ioc_xfer.ptr);
if (arg_size > NV_ABSOLUTE_MAX_IOCTL_SIZE)
{
nv_printf(NV_DBG_ERRORS, "NVRM: invalid ioctl XFER size!\n");
status = -EINVAL;
goto done;
}
}
NV_KMALLOC(arg_copy, arg_size);
if (arg_copy == NULL)
{
nv_printf(NV_DBG_ERRORS, "NVRM: failed to allocate ioctl memory\n");
status = -ENOMEM;
goto done;
}
if (NV_COPY_FROM_USER(arg_copy, arg_ptr, arg_size))
{
nv_printf(NV_DBG_ERRORS, "NVRM: failed to copy in ioctl data!\n");
status = -EFAULT;
goto done;
}
switch (arg_cmd)
{
case NV_ESC_QUERY_DEVICE_INTR:
{
nv_ioctl_query_device_intr *query_intr = arg_copy;
NV_ACTUAL_DEVICE_ONLY(nv);
if ((arg_size < sizeof(*query_intr)) ||
(!nv->regs->map))
{
status = -EINVAL;
goto done;
}
query_intr->intrStatus =
*(nv->regs->map + (NV_RM_DEVICE_INTR_ADDRESS >> 2));
query_intr->status = NV_OK;
break;
}
/* pass out info about the card */
case NV_ESC_CARD_INFO:
{
size_t num_arg_devices = arg_size / sizeof(nv_ioctl_card_info_t);
NV_CTL_DEVICE_ONLY(nv);
status = nvidia_read_card_info(arg_copy, num_arg_devices);
break;
}
case NV_ESC_ATTACH_GPUS_TO_FD:
{
size_t num_arg_gpus = arg_size / sizeof(NvU32);
size_t i;
NV_CTL_DEVICE_ONLY(nv);
if (num_arg_gpus == 0 || nvlfp->num_attached_gpus != 0 ||
arg_size % sizeof(NvU32) != 0)
{
status = -EINVAL;
goto done;
}
NV_KMALLOC(nvlfp->attached_gpus, arg_size);
if (nvlfp->attached_gpus == NULL)
{
status = -ENOMEM;
goto done;
}
memcpy(nvlfp->attached_gpus, arg_copy, arg_size);
nvlfp->num_attached_gpus = num_arg_gpus;
for (i = 0; i < nvlfp->num_attached_gpus; i++)
{
if (nvlfp->attached_gpus[i] == 0)
{
continue;
}
if (nvidia_dev_get(nvlfp->attached_gpus[i], sp))
{
while (i--)
{
if (nvlfp->attached_gpus[i] != 0)
nvidia_dev_put(nvlfp->attached_gpus[i], sp);
}
NV_KFREE(nvlfp->attached_gpus, arg_size);
nvlfp->num_attached_gpus = 0;
status = -EINVAL;
break;
}
}
break;
}
case NV_ESC_CHECK_VERSION_STR:
{
NV_CTL_DEVICE_ONLY(nv);
rmStatus = rm_perform_version_check(sp, arg_copy, arg_size);
status = ((rmStatus == NV_OK) ? 0 : -EINVAL);
break;
}
case NV_ESC_SYS_PARAMS:
{
nv_ioctl_sys_params_t *api = arg_copy;
NV_CTL_DEVICE_ONLY(nv);
if (arg_size != sizeof(nv_ioctl_sys_params_t))
{
status = -EINVAL;
goto done;
}
/* numa_memblock_size should only be set once */
if (nvl->numa_memblock_size == 0)
{
nvl->numa_memblock_size = api->memblock_size;
}
else
{
status = (nvl->numa_memblock_size == api->memblock_size) ?
0 : -EBUSY;
goto done;
}
break;
}
case NV_ESC_NUMA_INFO:
{
nv_ioctl_numa_info_t *api = arg_copy;
rmStatus = NV_OK;
NV_ACTUAL_DEVICE_ONLY(nv);
if (arg_size != sizeof(nv_ioctl_numa_info_t))
{
status = -EINVAL;
goto done;
}
api->offline_addresses.numEntries =
ARRAY_SIZE(api->offline_addresses.addresses),
rmStatus = rm_get_gpu_numa_info(sp, nv,
&(api->nid),
&(api->numa_mem_addr),
&(api->numa_mem_size),
(api->offline_addresses.addresses),
&(api->offline_addresses.numEntries));
if (rmStatus != NV_OK)
{
status = -EBUSY;
goto done;
}
api->status = nv_get_numa_status(nvl);
api->memblock_size = nv_ctl_device.numa_memblock_size;
break;
}
case NV_ESC_SET_NUMA_STATUS:
{
nv_ioctl_set_numa_status_t *api = arg_copy;
rmStatus = NV_OK;
if (!NV_IS_SUSER())
{
status = -EACCES;
goto done;
}
NV_ACTUAL_DEVICE_ONLY(nv);
if (arg_size != sizeof(nv_ioctl_set_numa_status_t))
{
status = -EINVAL;
goto done;
}
/*
* The nv_linux_state_t for the device needs to be locked
* in order to prevent additional open()/close() calls from
* manipulating the usage count for the device while we
* determine if NUMA state can be changed.
*/
down(&nvl->ldata_lock);
if (nv_get_numa_status(nvl) != api->status)
{
if (api->status == NV_IOCTL_NUMA_STATUS_OFFLINE_IN_PROGRESS)
{
/*
* Only the current client should have an open file
* descriptor for the device, to allow safe offlining.
*/
if (NV_ATOMIC_READ(nvl->usage_count) > 1)
{
status = -EBUSY;
goto unlock;
}
else
{
/*
* If this call fails, it indicates that RM
* is not ready to offline memory, and we should keep
* the current NUMA status of ONLINE.
*/
rmStatus = rm_gpu_numa_offline(sp, nv);
if (rmStatus != NV_OK)
{
status = -EBUSY;
goto unlock;
}
}
}
status = nv_set_numa_status(nvl, api->status);
if (status < 0)
{
if (api->status == NV_IOCTL_NUMA_STATUS_OFFLINE_IN_PROGRESS)
(void) rm_gpu_numa_online(sp, nv);
goto unlock;
}
if (api->status == NV_IOCTL_NUMA_STATUS_ONLINE)
{
rmStatus = rm_gpu_numa_online(sp, nv);
if (rmStatus != NV_OK)
{
status = -EBUSY;
goto unlock;
}
}
}
unlock:
up(&nvl->ldata_lock);
break;
}
case NV_ESC_EXPORT_TO_DMABUF_FD:
{
nv_ioctl_export_to_dma_buf_fd_t *params = arg_copy;
if (arg_size != sizeof(nv_ioctl_export_to_dma_buf_fd_t))
{
status = -EINVAL;
goto done;
}
NV_ACTUAL_DEVICE_ONLY(nv);
params->status = nv_dma_buf_export(nv, params);
break;
}
default:
rmStatus = rm_ioctl(sp, nv, &nvlfp->nvfp, arg_cmd, arg_copy, arg_size);
status = ((rmStatus == NV_OK) ? 0 : -EINVAL);
break;
}
done:
up(&nvlfp->fops_sp_lock[NV_FOPS_STACK_INDEX_IOCTL]);
up_read(&nv_system_pm_lock);
if (arg_copy != NULL)
{
if (status != -EFAULT)
{
if (NV_COPY_TO_USER(arg_ptr, arg_copy, arg_size))
{
nv_printf(NV_DBG_ERRORS, "NVRM: failed to copy out ioctl data\n");
status = -EFAULT;
}
}
NV_KFREE(arg_copy, arg_size);
}
return status;
}
irqreturn_t
nvidia_isr_msix(
int irq,
void *arg
)
{
irqreturn_t ret;
nv_linux_state_t *nvl = (void *) arg;
// nvidia_isr_msix() is called for each of the MSI-X vectors and they can
// run in parallel on different CPUs (cores), but this is not currently
// supported by nvidia_isr() and its children. As a big hammer fix just
// spinlock around the nvidia_isr() call to serialize them.
//
// At this point interrupts are disabled on the CPU running our ISR (see
// comments for nv_default_irq_flags()) so a plain spinlock is enough.
NV_SPIN_LOCK(&nvl->msix_isr_lock);
ret = nvidia_isr(irq, arg);
NV_SPIN_UNLOCK(&nvl->msix_isr_lock);
return ret;
}
/*
* driver receives an interrupt
* if someone waiting, then hand it off.
*/
irqreturn_t
nvidia_isr(
int irq,
void *arg
)
{
nv_linux_state_t *nvl = (void *) arg;
nv_state_t *nv = NV_STATE_PTR(nvl);
NvU32 need_to_run_bottom_half_gpu_lock_held = 0;
NvBool rm_handled = NV_FALSE, uvm_handled = NV_FALSE, rm_fault_handling_needed = NV_FALSE;
NvU32 rm_serviceable_fault_cnt = 0;
NvU32 sec, usec;
NvU16 index = 0;
NvU64 currentTime = 0;
NvBool found_irq = NV_FALSE;
rm_gpu_copy_mmu_faults_unlocked(nvl->sp[NV_DEV_STACK_ISR], nv, &rm_serviceable_fault_cnt);
rm_fault_handling_needed = (rm_serviceable_fault_cnt != 0);
#if defined (NV_UVM_ENABLE)
//
// Returns NV_OK if the UVM driver handled the interrupt
//
// Returns NV_ERR_NO_INTR_PENDING if the interrupt is not for
// the UVM driver.
//
// Returns NV_WARN_MORE_PROCESSING_REQUIRED if the UVM top-half ISR was
// unable to get its lock(s), due to other (UVM) threads holding them.
//
// RM can normally treat NV_WARN_MORE_PROCESSING_REQUIRED the same as
// NV_ERR_NO_INTR_PENDING, but in some cases the extra information may
// be helpful.
//
if (nv_uvm_event_interrupt(nv_get_cached_uuid(nv)) == NV_OK)
uvm_handled = NV_TRUE;
#endif
rm_handled = rm_isr(nvl->sp[NV_DEV_STACK_ISR], nv,
&need_to_run_bottom_half_gpu_lock_held);
/* Replicating the logic in linux kernel to track unhandled interrupt crossing a threshold */
if ((nv->flags & NV_FLAG_USES_MSI) || (nv->flags & NV_FLAG_USES_MSIX))
{
if (nvl->irq_count != NULL)
{
for (index = 0; index < nvl->current_num_irq_tracked; index++)
{
if (nvl->irq_count[index].irq == irq)
{
found_irq = NV_TRUE;
break;
}
found_irq = NV_FALSE;
}
if (!found_irq && nvl->current_num_irq_tracked < nvl->num_intr)
{
index = nvl->current_num_irq_tracked;
nvl->irq_count[index].irq = irq;
nvl->current_num_irq_tracked++;
found_irq = NV_TRUE;
}
if (found_irq)
{
nvl->irq_count[index].total++;
if(rm_handled == NV_FALSE)
{
os_get_current_time(&sec, &usec);
currentTime = ((NvU64)sec) * 1000000 + (NvU64)usec;
/* Reset unhandled count if it's been more than 0.1 seconds since the last unhandled IRQ */
if ((currentTime - nvl->irq_count[index].last_unhandled) > RM_UNHANDLED_TIMEOUT_US)
nvl->irq_count[index].unhandled = 1;
else
nvl->irq_count[index].unhandled++;
nvl->irq_count[index].last_unhandled = currentTime;
rm_handled = NV_TRUE;
}
if (nvl->irq_count[index].total >= RM_THRESHOLD_TOTAL_IRQ_COUNT)
{
if (nvl->irq_count[index].unhandled > RM_THRESHOLD_UNAHNDLED_IRQ_COUNT)
nv_printf(NV_DBG_ERRORS,"NVRM: Going over RM unhandled interrupt threshold for irq %d\n", irq);
nvl->irq_count[index].total = 0;
nvl->irq_count[index].unhandled = 0;
nvl->irq_count[index].last_unhandled = 0;
}
}
else
nv_printf(NV_DBG_ERRORS,"NVRM: IRQ number out of valid range\n");
}
}
if (need_to_run_bottom_half_gpu_lock_held)
{
return IRQ_WAKE_THREAD;
}
else
{
//
// If rm_isr does not need to run a bottom half and mmu_faults_copied
// indicates that bottom half is needed, then we enqueue a kthread based
// bottom half, as this specific bottom_half will acquire the GPU lock
//
if (rm_fault_handling_needed)
nv_kthread_q_schedule_q_item(&nvl->bottom_half_q, &nvl->bottom_half_q_item);
}
return IRQ_RETVAL(rm_handled || uvm_handled || rm_fault_handling_needed);
}
irqreturn_t
nvidia_isr_kthread_bh(
int irq,
void *data
)
{
return nvidia_isr_common_bh(data);
}
irqreturn_t
nvidia_isr_msix_kthread_bh(
int irq,
void *data
)
{
NV_STATUS status;
irqreturn_t ret;
nv_state_t *nv = (nv_state_t *) data;
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
//
// Synchronize kthreads servicing bottom halves for different MSI-X vectors
// as they share same pre-allocated alt-stack.
//
status = os_acquire_mutex(nvl->msix_bh_mutex);
// os_acquire_mutex can only fail if we cannot sleep and we can
WARN_ON(status != NV_OK);
ret = nvidia_isr_common_bh(data);
os_release_mutex(nvl->msix_bh_mutex);
return ret;
}
static irqreturn_t
nvidia_isr_common_bh(
void *data
)
{
nv_state_t *nv = (nv_state_t *) data;
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
nvidia_stack_t *sp = nvl->sp[NV_DEV_STACK_ISR_BH];
NV_STATUS status;
status = nv_check_gpu_state(nv);
if (status == NV_ERR_GPU_IS_LOST)
{
nv_printf(NV_DBG_INFO, "NVRM: GPU is lost, skipping ISR bottom half\n");
}
else
{
rm_isr_bh(sp, nv);
}
return IRQ_HANDLED;
}
static void
nvidia_isr_bh_unlocked(
void * args
)
{
nv_state_t *nv = (nv_state_t *) args;
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
nvidia_stack_t *sp;
NV_STATUS status;
//
// Synchronize kthreads servicing unlocked bottom half as they
// share same pre-allocated stack for alt-stack
//
status = os_acquire_mutex(nvl->isr_bh_unlocked_mutex);
if (status != NV_OK)
{
nv_printf(NV_DBG_ERRORS, "NVRM: %s: Unable to take bottom_half mutex!\n",
__FUNCTION__);
WARN_ON(1);
}
sp = nvl->sp[NV_DEV_STACK_ISR_BH_UNLOCKED];
status = nv_check_gpu_state(nv);
if (status == NV_ERR_GPU_IS_LOST)
{
nv_printf(NV_DBG_INFO,
"NVRM: GPU is lost, skipping unlocked ISR bottom half\n");
}
else
{
rm_isr_bh_unlocked(sp, nv);
}
os_release_mutex(nvl->isr_bh_unlocked_mutex);
}
static void
nvidia_rc_timer_callback(
struct nv_timer *nv_timer
)
{
nv_linux_state_t *nvl = container_of(nv_timer, nv_linux_state_t, rc_timer);
nv_state_t *nv = NV_STATE_PTR(nvl);
nvidia_stack_t *sp = nvl->sp[NV_DEV_STACK_TIMER];
NV_STATUS status;
status = nv_check_gpu_state(nv);
if (status == NV_ERR_GPU_IS_LOST)
{
nv_printf(NV_DBG_INFO,
"NVRM: GPU is lost, skipping device timer callbacks\n");
return;
}
if (rm_run_rc_callback(sp, nv) == NV_OK)
{
// set another timeout 1 sec in the future:
mod_timer(&nvl->rc_timer.kernel_timer, jiffies + HZ);
}
}
/*
** nvidia_ctl_open
**
** nv control driver open entry point. Sessions are created here.
*/
static int
nvidia_ctl_open(
struct inode *inode,
struct file *file
)
{
nv_linux_state_t *nvl = &nv_ctl_device;
nv_state_t *nv = NV_STATE_PTR(nvl);
nv_linux_file_private_t *nvlfp = NV_GET_LINUX_FILE_PRIVATE(file);
nv_printf(NV_DBG_INFO, "NVRM: nvidia_ctl_open\n");
down(&nvl->ldata_lock);
/* save the nv away in file->private_data */
nvlfp->nvptr = nvl;
if (NV_ATOMIC_READ(nvl->usage_count) == 0)
{
nv->flags |= (NV_FLAG_OPEN | NV_FLAG_CONTROL);
}
NV_ATOMIC_INC(nvl->usage_count);
up(&nvl->ldata_lock);
return 0;
}
/*
** nvidia_ctl_close
*/
static int
nvidia_ctl_close(
struct inode *inode,
struct file *file
)
{
nv_alloc_t *at, *next;
nv_linux_state_t *nvl = NV_GET_NVL_FROM_FILEP(file);
nv_state_t *nv = NV_STATE_PTR(nvl);
nv_linux_file_private_t *nvlfp = NV_GET_LINUX_FILE_PRIVATE(file);
nvidia_stack_t *sp = nvlfp->sp;
unsigned int i;
nv_printf(NV_DBG_INFO, "NVRM: nvidia_ctl_close\n");
down(&nvl->ldata_lock);
if (NV_ATOMIC_DEC_AND_TEST(nvl->usage_count))
{
nv->flags &= ~NV_FLAG_OPEN;
}
up(&nvl->ldata_lock);
rm_cleanup_file_private(sp, nv, &nvlfp->nvfp);
if (nvlfp->free_list != NULL)
{
at = nvlfp->free_list;
while (at != NULL)
{
next = at->next;
if (at->pid == os_get_current_process())
NV_PRINT_AT(NV_DBG_MEMINFO, at);
nv_free_pages(nv, at->num_pages,
at->flags.contig,
at->cache_type,
(void *)at);
at = next;
}
}
if (nvlfp->num_attached_gpus != 0)
{
size_t i;
for (i = 0; i < nvlfp->num_attached_gpus; i++)
{
if (nvlfp->attached_gpus[i] != 0)
nvidia_dev_put(nvlfp->attached_gpus[i], sp);
}
NV_KFREE(nvlfp->attached_gpus, sizeof(NvU32) * nvlfp->num_attached_gpus);
nvlfp->num_attached_gpus = 0;
}
for (i = 0; i < NV_FOPS_STACK_INDEX_COUNT; ++i)
{
nv_kmem_cache_free_stack(nvlfp->fops_sp[i]);
}
nv_free_file_private(nvlfp);
NV_SET_FILE_PRIVATE(file, NULL);
nv_kmem_cache_free_stack(sp);
return 0;
}
void NV_API_CALL
nv_set_dma_address_size(
nv_state_t *nv,
NvU32 phys_addr_bits
)
{
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
NvU64 start_addr = nv_get_dma_start_address(nv);
NvU64 new_mask = (((NvU64)1) << phys_addr_bits) - 1;
nvl->dma_dev.addressable_range.limit = start_addr + new_mask;
/*
* The only scenario in which we definitely should not update the DMA mask
* is on POWER, when using TCE bypass mode (see nv_get_dma_start_address()
* for details), since the meaning of the DMA mask is overloaded in that
* case.
*/
if (!nvl->tce_bypass_enabled)
{
dma_set_mask(&nvl->pci_dev->dev, new_mask);
/* Certain kernels have a bug which causes pci_set_consistent_dma_mask
* to call GPL sme_active symbol, this bug has already been fixed in a
* minor release update but detect the failure scenario here to prevent
* an installation regression */
#if !NV_IS_EXPORT_SYMBOL_GPL_sme_active
dma_set_coherent_mask(&nvl->pci_dev->dev, new_mask);
#endif
}
}
static NvUPtr
nv_map_guest_pages(nv_alloc_t *at,
NvU64 address,
NvU32 page_count,
NvU32 page_idx)
{
struct page **pages;
NvU32 j;
NvUPtr virt_addr;
NV_KMALLOC(pages, sizeof(struct page *) * page_count);
if (pages == NULL)
{
nv_printf(NV_DBG_ERRORS,
"NVRM: failed to allocate vmap() page descriptor table!\n");
return 0;
}
for (j = 0; j < page_count; j++)
{
pages[j] = NV_GET_PAGE_STRUCT(at->page_table[page_idx+j]->phys_addr);
}
virt_addr = nv_vm_map_pages(pages, page_count,
at->cache_type == NV_MEMORY_CACHED, at->flags.unencrypted);
NV_KFREE(pages, sizeof(struct page *) * page_count);
return virt_addr;
}
NV_STATUS NV_API_CALL
nv_alias_pages(
nv_state_t *nv,
NvU32 page_cnt,
NvU32 contiguous,
NvU32 cache_type,
NvU64 guest_id,
NvU64 *pte_array,
void **priv_data
)
{
nv_alloc_t *at;
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
NvU32 i=0;
nvidia_pte_t *page_ptr = NULL;
at = nvos_create_alloc(nvl->dev, page_cnt);
if (at == NULL)
{
return NV_ERR_NO_MEMORY;
}
at->cache_type = cache_type;
if (contiguous)
at->flags.contig = NV_TRUE;
#if defined(NVCPU_AARCH64)
if (at->cache_type != NV_MEMORY_CACHED)
at->flags.aliased = NV_TRUE;
#endif
at->flags.guest = NV_TRUE;
at->order = get_order(at->num_pages * PAGE_SIZE);
for (i=0; i < at->num_pages; ++i)
{
page_ptr = at->page_table[i];
if (contiguous && i>0)
{
page_ptr->dma_addr = pte_array[0] + (i << PAGE_SHIFT);
}
else
{
page_ptr->dma_addr = pte_array[i];
}
page_ptr->phys_addr = page_ptr->dma_addr;
/* aliased pages will be mapped on demand. */
page_ptr->virt_addr = 0x0;
}
at->guest_id = guest_id;
*priv_data = at;
NV_ATOMIC_INC(at->usage_count);
NV_PRINT_AT(NV_DBG_MEMINFO, at);
return NV_OK;
}
/*
* This creates a dummy nv_alloc_t for peer IO mem, so that it can
* be mapped using NvRmMapMemory.
*/
NV_STATUS NV_API_CALL nv_register_peer_io_mem(
nv_state_t *nv,
NvU64 *phys_addr,
NvU64 page_count,
void **priv_data
)
{
nv_alloc_t *at;
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
NvU64 i;
NvU64 addr;
at = nvos_create_alloc(nvl->dev, page_count);
if (at == NULL)
return NV_ERR_NO_MEMORY;
// IO regions should be uncached and contiguous
at->cache_type = NV_MEMORY_UNCACHED;
at->flags.contig = NV_TRUE;
#if defined(NVCPU_AARCH64)
at->flags.aliased = NV_TRUE;
#endif
at->flags.peer_io = NV_TRUE;
at->order = get_order(at->num_pages * PAGE_SIZE);
addr = phys_addr[0];
for (i = 0; i < page_count; i++)
{
at->page_table[i]->phys_addr = addr;
addr += PAGE_SIZE;
}
// No struct page array exists for this memory.
at->user_pages = NULL;
*priv_data = at;
NV_PRINT_AT(NV_DBG_MEMINFO, at);
return NV_OK;
}
void NV_API_CALL nv_unregister_peer_io_mem(
nv_state_t *nv,
void *priv_data
)
{
nv_alloc_t *at = priv_data;
NV_PRINT_AT(NV_DBG_MEMINFO, at);
nvos_free_alloc(at);
}
/*
* By registering user pages, we create a dummy nv_alloc_t for it, so that the
* rest of the RM can treat it like any other alloc.
*
* This also converts the page array to an array of physical addresses.
*/
NV_STATUS NV_API_CALL nv_register_user_pages(
nv_state_t *nv,
NvU64 page_count,
NvU64 *phys_addr,
void *import_priv,
void **priv_data
)
{
nv_alloc_t *at;
NvU64 i;
struct page **user_pages;
nv_linux_state_t *nvl;
nvidia_pte_t *page_ptr;
nv_printf(NV_DBG_MEMINFO, "NVRM: VM: nv_register_user_pages: 0x%x\n", page_count);
user_pages = *priv_data;
nvl = NV_GET_NVL_FROM_NV_STATE(nv);
at = nvos_create_alloc(nvl->dev, page_count);
if (at == NULL)
{
return NV_ERR_NO_MEMORY;
}
/*
* Anonymous memory currently must be write-back cacheable, and we can't
* enforce contiguity.
*/
at->cache_type = NV_MEMORY_UNCACHED;
#if defined(NVCPU_AARCH64)
at->flags.aliased = NV_TRUE;
#endif
at->flags.user = NV_TRUE;
at->order = get_order(at->num_pages * PAGE_SIZE);
for (i = 0; i < page_count; i++)
{
/*
* We only assign the physical address and not the DMA address, since
* this allocation hasn't been DMA-mapped yet.
*/
page_ptr = at->page_table[i];
page_ptr->phys_addr = page_to_phys(user_pages[i]);
phys_addr[i] = page_ptr->phys_addr;
}
/* Save off the user pages array to be restored later */
at->user_pages = user_pages;
/* Save off the import private data to be returned later */
if (import_priv != NULL)
{
at->import_priv = import_priv;
}
*priv_data = at;
NV_PRINT_AT(NV_DBG_MEMINFO, at);
return NV_OK;
}
void NV_API_CALL nv_unregister_user_pages(
nv_state_t *nv,
NvU64 page_count,
void **import_priv,
void **priv_data
)
{
nv_alloc_t *at = *priv_data;
nv_printf(NV_DBG_MEMINFO, "NVRM: VM: nv_unregister_user_pages: 0x%x\n", page_count);
NV_PRINT_AT(NV_DBG_MEMINFO, at);
WARN_ON(!at->flags.user);
/* Restore the user pages array for the caller to handle */
*priv_data = at->user_pages;
/* Return the import private data for the caller to handle */
if (import_priv != NULL)
{
*import_priv = at->import_priv;
}
nvos_free_alloc(at);
}
/*
* This creates a dummy nv_alloc_t for existing physical allocations, so
* that it can be mapped using NvRmMapMemory and BAR2 code path.
*/
NV_STATUS NV_API_CALL nv_register_phys_pages(
nv_state_t *nv,
NvU64 *phys_addr,
NvU64 page_count,
NvU32 cache_type,
void **priv_data
)
{
nv_alloc_t *at;
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
NvU64 i;
NvU64 addr;
at = nvos_create_alloc(nvl->dev, page_count);
if (at == NULL)
return NV_ERR_NO_MEMORY;
/*
* Setting memory flags to cacheable and discontiguous.
*/
at->cache_type = cache_type;
/*
* Only physical address is available so we don't try to reuse existing
* mappings
*/
at->flags.physical = NV_TRUE;
at->order = get_order(at->num_pages * PAGE_SIZE);
for (i = 0, addr = phys_addr[0]; i < page_count; addr = phys_addr[++i])
{
at->page_table[i]->phys_addr = addr;
}
at->user_pages = NULL;
*priv_data = at;
NV_PRINT_AT(NV_DBG_MEMINFO, at);
return NV_OK;
}
NV_STATUS NV_API_CALL nv_register_sgt(
nv_state_t *nv,
NvU64 *phys_addr,
NvU64 page_count,
NvU32 cache_type,
void **priv_data,
struct sg_table *import_sgt,
void *import_priv
)
{
nv_alloc_t *at;
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
unsigned int i, j = 0;
NvU64 sg_addr, sg_off, sg_len;
struct scatterlist *sg;
at = nvos_create_alloc(nvl->dev, page_count);
if (at == NULL)
return NV_ERR_NO_MEMORY;
/* Populate phys addrs with DMA addrs from SGT */
for_each_sg(import_sgt->sgl, sg, import_sgt->nents, i)
{
/*
* It is possible for dma_map_sg() to merge scatterlist entries, so
* make sure we account for that here.
*/
for (sg_addr = sg_dma_address(sg), sg_len = sg_dma_len(sg), sg_off = 0;
(sg_off < sg_len) && (j < page_count);
sg_off += PAGE_SIZE, j++)
{
phys_addr[j] = sg_addr + sg_off;
}
}
/*
* Setting memory flags to cacheable and discontiguous.
*/
at->cache_type = cache_type;
at->import_sgt = import_sgt;
/* Save off the import private data to be returned later */
if (import_priv != NULL)
{
at->import_priv = import_priv;
}
at->order = get_order(at->num_pages * PAGE_SIZE);
*priv_data = at;
NV_PRINT_AT(NV_DBG_MEMINFO, at);
return NV_OK;
}
void NV_API_CALL nv_unregister_sgt(
nv_state_t *nv,
struct sg_table **import_sgt,
void **import_priv,
void *priv_data
)
{
nv_alloc_t *at = priv_data;
nv_printf(NV_DBG_MEMINFO, "NVRM: VM: nv_unregister_sgt\n");
NV_PRINT_AT(NV_DBG_MEMINFO, at);
/* Restore the imported SGT for the caller to handle */
*import_sgt = at->import_sgt;
/* Return the import private data for the caller to handle */
if (import_priv != NULL)
{
*import_priv = at->import_priv;
}
nvos_free_alloc(at);
}
void NV_API_CALL nv_unregister_phys_pages(
nv_state_t *nv,
void *priv_data
)
{
nv_alloc_t *at = priv_data;
NV_PRINT_AT(NV_DBG_MEMINFO, at);
nvos_free_alloc(at);
}
NV_STATUS NV_API_CALL nv_get_num_phys_pages(
void *pAllocPrivate,
NvU32 *pNumPages
)
{
nv_alloc_t *at = pAllocPrivate;
if (!pNumPages) {
return NV_ERR_INVALID_ARGUMENT;
}
*pNumPages = at->num_pages;
return NV_OK;
}
NV_STATUS NV_API_CALL nv_get_phys_pages(
void *pAllocPrivate,
void *pPages,
NvU32 *pNumPages
)
{
nv_alloc_t *at = pAllocPrivate;
struct page **pages = (struct page **)pPages;
NvU32 page_count;
int i;
if (!pNumPages || !pPages) {
return NV_ERR_INVALID_ARGUMENT;
}
page_count = NV_MIN(*pNumPages, at->num_pages);
for (i = 0; i < page_count; i++) {
pages[i] = NV_GET_PAGE_STRUCT(at->page_table[i]->phys_addr);
}
*pNumPages = page_count;
return NV_OK;
}
void* NV_API_CALL nv_alloc_kernel_mapping(
nv_state_t *nv,
void *pAllocPrivate,
NvU64 pageIndex,
NvU32 pageOffset,
NvU64 size,
void **pPrivate
)
{
nv_alloc_t *at = pAllocPrivate;
NvU32 j, page_count;
NvUPtr virt_addr;
struct page **pages;
NvBool isUserAllocatedMem;
//
// For User allocated memory (like ErrorNotifier's) which is NOT allocated
// nor owned by RM, the RM driver just stores the physical address
// corresponding to that memory and does not map it until required.
// In that case, in page tables the virt_addr == 0, so first we need to map
// those pages to obtain virtual address.
//
isUserAllocatedMem = at->flags.user &&
!at->page_table[pageIndex]->virt_addr &&
at->page_table[pageIndex]->phys_addr;
//
// User memory may NOT have kernel VA. So check this and fallback to else
// case to create one.
//
if (((size + pageOffset) <= PAGE_SIZE) &&
!at->flags.guest && !at->flags.aliased &&
!isUserAllocatedMem && !at->flags.physical)
{
*pPrivate = NULL;
return (void *)(at->page_table[pageIndex]->virt_addr + pageOffset);
}
else
{
size += pageOffset;
page_count = (size >> PAGE_SHIFT) + ((size & ~NV_PAGE_MASK) ? 1 : 0);
if (at->flags.guest)
{
virt_addr = nv_map_guest_pages(at,
nv->bars[NV_GPU_BAR_INDEX_REGS].cpu_address,
page_count, pageIndex);
}
else
{
NV_KMALLOC(pages, sizeof(struct page *) * page_count);
if (pages == NULL)
{
nv_printf(NV_DBG_ERRORS,
"NVRM: failed to allocate vmap() page descriptor table!\n");
return NULL;
}
for (j = 0; j < page_count; j++)
pages[j] = NV_GET_PAGE_STRUCT(at->page_table[pageIndex+j]->phys_addr);
virt_addr = nv_vm_map_pages(pages, page_count,
at->cache_type == NV_MEMORY_CACHED, at->flags.unencrypted);
NV_KFREE(pages, sizeof(struct page *) * page_count);
}
if (virt_addr == 0)
{
nv_printf(NV_DBG_ERRORS, "NVRM: failed to map pages!\n");
return NULL;
}
*pPrivate = (void *)(NvUPtr)page_count;
return (void *)(virt_addr + pageOffset);
}
return NULL;
}
NV_STATUS NV_API_CALL nv_free_kernel_mapping(
nv_state_t *nv,
void *pAllocPrivate,
void *address,
void *pPrivate
)
{
nv_alloc_t *at = pAllocPrivate;
NvUPtr virt_addr;
NvU32 page_count;
virt_addr = ((NvUPtr)address & NV_PAGE_MASK);
page_count = (NvUPtr)pPrivate;
if (at->flags.guest)
{
nv_iounmap((void *)virt_addr, (page_count * PAGE_SIZE));
}
else if (pPrivate != NULL)
{
nv_vm_unmap_pages(virt_addr, page_count);
}
return NV_OK;
}
NV_STATUS NV_API_CALL nv_alloc_pages(
nv_state_t *nv,
NvU32 page_count,
NvBool contiguous,
NvU32 cache_type,
NvBool zeroed,
NvBool unencrypted,
NvU64 *pte_array,
void **priv_data
)
{
nv_alloc_t *at;
NV_STATUS status = NV_ERR_NO_MEMORY;
nv_linux_state_t *nvl = NULL;
NvBool will_remap = NV_FALSE;
NvU32 i;
struct device *dev = NULL;
nv_printf(NV_DBG_MEMINFO, "NVRM: VM: nv_alloc_pages: %d pages\n", page_count);
nv_printf(NV_DBG_MEMINFO, "NVRM: VM: contig %d cache_type %d\n",
contiguous, cache_type);
//
// system memory allocation can be associated with a client instead of a gpu
// handle the case where per device state is NULL
//
if(nv)
{
nvl = NV_GET_NVL_FROM_NV_STATE(nv);
will_remap = nv_requires_dma_remap(nv);
dev = nvl->dev;
}
if (nv_encode_caching(NULL, cache_type, NV_MEMORY_TYPE_SYSTEM))
return NV_ERR_NOT_SUPPORTED;
at = nvos_create_alloc(dev, page_count);
if (at == NULL)
return NV_ERR_NO_MEMORY;
at->cache_type = cache_type;
if (contiguous)
at->flags.contig = NV_TRUE;
if (zeroed)
at->flags.zeroed = NV_TRUE;
#if defined(NVCPU_AARCH64)
if (at->cache_type != NV_MEMORY_CACHED)
at->flags.aliased = NV_TRUE;
#endif
if (unencrypted)
at->flags.unencrypted = NV_TRUE;
#if defined(NVCPU_PPC64LE)
/*
* Starting on Power9 systems, DMA addresses for NVLink are no longer the
* same as used over PCIe. There is an address compression scheme required
* for NVLink ONLY which impacts the upper address bits of the DMA address.
*
* This divergence between PCIe and NVLink DMA mappings breaks assumptions
* in the driver where during initialization we allocate system memory
* for the GPU to access over PCIe before NVLink is trained -- and some of
* these mappings persist on the GPU. If these persistent mappings are not
* equivalent they will cause invalid DMA accesses from the GPU once we
* switch to NVLink.
*
* To work around this we limit all system memory allocations from the driver
* during the period before NVLink is enabled to be from NUMA node 0 (CPU 0)
* which has a CPU real address with the upper address bits (above bit 42)
* set to 0. Effectively making the PCIe and NVLink DMA mappings equivalent
* allowing persistent system memory mappings already programmed on the GPU
* to remain valid after NVLink is enabled.
*
* See Bug 1920398 for more details.
*/
if (nv && nvl->npu && !nvl->dma_dev.nvlink)
at->flags.node0 = NV_TRUE;
#endif
if (at->flags.contig)
status = nv_alloc_contig_pages(nv, at);
else
status = nv_alloc_system_pages(nv, at);
if (status != NV_OK)
goto failed;
for (i = 0; i < ((contiguous) ? 1 : page_count); i++)
{
/*
* The contents of the pte_array[] depend on whether or not this device
* requires DMA-remapping. If it does, it should be the phys addresses
* used by the DMA-remapping paths, otherwise it should be the actual
* address that the device should use for DMA (which, confusingly, may
* be different than the CPU physical address, due to a static DMA
* offset).
*/
if ((nv == NULL) || will_remap)
{
pte_array[i] = at->page_table[i]->phys_addr;
}
else
{
pte_array[i] = nv_phys_to_dma(dev,
at->page_table[i]->phys_addr);
}
}
*priv_data = at;
NV_ATOMIC_INC(at->usage_count);
NV_PRINT_AT(NV_DBG_MEMINFO, at);
return NV_OK;
failed:
nvos_free_alloc(at);
return status;
}
NV_STATUS NV_API_CALL nv_free_pages(
nv_state_t *nv,
NvU32 page_count,
NvBool contiguous,
NvU32 cache_type,
void *priv_data
)
{
NV_STATUS rmStatus = NV_OK;
nv_alloc_t *at = priv_data;
nv_printf(NV_DBG_MEMINFO, "NVRM: VM: nv_free_pages: 0x%x\n", page_count);
NV_PRINT_AT(NV_DBG_MEMINFO, at);
/*
* If the 'at' usage count doesn't drop to zero here, not all of
* the user mappings have been torn down in time - we can't
* safely free the memory. We report success back to the RM, but
* defer the actual free operation until later.
*
* This is described in greater detail in the comments above the
* nvidia_vma_(open|release)() callbacks in nv-mmap.c.
*/
if (!NV_ATOMIC_DEC_AND_TEST(at->usage_count))
return NV_OK;
if (!at->flags.guest)
{
if (at->flags.contig)
nv_free_contig_pages(at);
else
nv_free_system_pages(at);
}
nvos_free_alloc(at);
return rmStatus;
}
NvBool nv_lock_init_locks
(
nvidia_stack_t *sp,
nv_state_t *nv
)
{
nv_linux_state_t *nvl;
nvl = NV_GET_NVL_FROM_NV_STATE(nv);
NV_INIT_MUTEX(&nvl->ldata_lock);
NV_INIT_MUTEX(&nvl->mmap_lock);
NV_ATOMIC_SET(nvl->usage_count, 0);
if (!rm_init_event_locks(sp, nv))
return NV_FALSE;
return NV_TRUE;
}
void nv_lock_destroy_locks
(
nvidia_stack_t *sp,
nv_state_t *nv
)
{
rm_destroy_event_locks(sp, nv);
}
void NV_API_CALL nv_post_event(
nv_event_t *event,
NvHandle handle,
NvU32 index,
NvU32 info32,
NvU16 info16,
NvBool data_valid
)
{
nv_linux_file_private_t *nvlfp = nv_get_nvlfp_from_nvfp(event->nvfp);
unsigned long eflags;
nvidia_event_t *nvet;
NV_SPIN_LOCK_IRQSAVE(&nvlfp->fp_lock, eflags);
if (data_valid)
{
NV_KMALLOC_ATOMIC(nvet, sizeof(nvidia_event_t));
if (nvet == NULL)
{
NV_SPIN_UNLOCK_IRQRESTORE(&nvlfp->fp_lock, eflags);
return;
}
if (nvlfp->event_data_tail != NULL)
nvlfp->event_data_tail->next = nvet;
if (nvlfp->event_data_head == NULL)
nvlfp->event_data_head = nvet;
nvlfp->event_data_tail = nvet;
nvet->next = NULL;
nvet->event = *event;
nvet->event.hObject = handle;
nvet->event.index = index;
nvet->event.info32 = info32;
nvet->event.info16 = info16;
}
//
// 'event_pending' is interpreted by nvidia_poll() and nv_get_event() to
// mean that an event without data is pending. Therefore, only set it to
// true here if newly posted event is dataless.
//
else
{
nvlfp->dataless_event_pending = NV_TRUE;
}
NV_SPIN_UNLOCK_IRQRESTORE(&nvlfp->fp_lock, eflags);
wake_up_interruptible(&nvlfp->waitqueue);
}
NvBool NV_API_CALL nv_is_rm_firmware_active(
nv_state_t *nv
)
{
if (rm_firmware_active)
{
// "all" here means all GPUs
if (strcmp(rm_firmware_active, "all") == 0)
return NV_TRUE;
}
return NV_FALSE;
}
const char *nv_firmware_path(
nv_firmware_t fw_type
)
{
switch (fw_type)
{
case NV_FIRMWARE_GSP:
return NV_FIRMWARE_GSP_FILENAME;
case NV_FIRMWARE_GSP_LOG:
return NV_FIRMWARE_GSP_LOG_FILENAME;
}
return "";
}
const void* NV_API_CALL nv_get_firmware(
nv_state_t *nv,
nv_firmware_t fw_type,
const void **fw_buf,
NvU32 *fw_size
)
{
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
const struct firmware *fw;
// path is relative to /lib/firmware
// if this fails it will print an error to dmesg
if (request_firmware(&fw, nv_firmware_path(fw_type), nvl->dev) != 0)
return NULL;
*fw_size = fw->size;
*fw_buf = fw->data;
return fw;
}
void NV_API_CALL nv_put_firmware(
const void *fw_handle
)
{
release_firmware(fw_handle);
}
nv_file_private_t* NV_API_CALL nv_get_file_private(
NvS32 fd,
NvBool ctl,
void **os_private
)
{
struct file *filp = NULL;
nv_linux_file_private_t *nvlfp = NULL;
dev_t rdev = 0;
filp = fget(fd);
if (filp == NULL || !NV_FILE_INODE(filp))
{
goto fail;
}
rdev = (NV_FILE_INODE(filp))->i_rdev;
if (MAJOR(rdev) != NV_MAJOR_DEVICE_NUMBER)
{
goto fail;
}
if (ctl)
{
if (MINOR(rdev) != NV_CONTROL_DEVICE_MINOR)
goto fail;
}
else
{
NvBool found = NV_FALSE;
int i;
for (i = 0; i <= NV_FRONTEND_CONTROL_DEVICE_MINOR_MIN; i++)
{
if ((nv_minor_num_table[i] != NULL) && (MINOR(rdev) == i))
{
found = NV_TRUE;
break;
}
}
if (!found)
goto fail;
}
nvlfp = NV_GET_LINUX_FILE_PRIVATE(filp);
*os_private = filp;
return &nvlfp->nvfp;
fail:
if (filp != NULL)
{
fput(filp);
}
return NULL;
}
void NV_API_CALL nv_put_file_private(
void *os_private
)
{
struct file *filp = os_private;
fput(filp);
}
int NV_API_CALL nv_get_event(
nv_file_private_t *nvfp,
nv_event_t *event,
NvU32 *pending
)
{
nv_linux_file_private_t *nvlfp = nv_get_nvlfp_from_nvfp(nvfp);
nvidia_event_t *nvet;
unsigned long eflags;
NV_SPIN_LOCK_IRQSAVE(&nvlfp->fp_lock, eflags);
nvet = nvlfp->event_data_head;
if (nvet == NULL)
{
NV_SPIN_UNLOCK_IRQRESTORE(&nvlfp->fp_lock, eflags);
return NV_ERR_GENERIC;
}
*event = nvet->event;
if (nvlfp->event_data_tail == nvet)
nvlfp->event_data_tail = NULL;
nvlfp->event_data_head = nvet->next;
*pending = (nvlfp->event_data_head != NULL);
NV_SPIN_UNLOCK_IRQRESTORE(&nvlfp->fp_lock, eflags);
NV_KFREE(nvet, sizeof(nvidia_event_t));
return NV_OK;
}
int NV_API_CALL nv_start_rc_timer(
nv_state_t *nv
)
{
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
if (nv->rc_timer_enabled)
return -1;
nv_printf(NV_DBG_INFO, "NVRM: initializing rc timer\n");
nv_timer_setup(&nvl->rc_timer, nvidia_rc_timer_callback);
nv->rc_timer_enabled = 1;
// set the timeout for 1 second in the future:
mod_timer(&nvl->rc_timer.kernel_timer, jiffies + HZ);
nv_printf(NV_DBG_INFO, "NVRM: rc timer initialized\n");
return 0;
}
int NV_API_CALL nv_stop_rc_timer(
nv_state_t *nv
)
{
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
if (!nv->rc_timer_enabled)
return -1;
nv_printf(NV_DBG_INFO, "NVRM: stopping rc timer\n");
nv->rc_timer_enabled = 0;
del_timer_sync(&nvl->rc_timer.kernel_timer);
nv_printf(NV_DBG_INFO, "NVRM: rc timer stopped\n");
return 0;
}
#define SNAPSHOT_TIMER_FREQ (jiffies + HZ / NV_SNAPSHOT_TIMER_HZ)
static void snapshot_timer_callback(struct nv_timer *timer)
{
nv_linux_state_t *nvl = &nv_ctl_device;
nv_state_t *nv = NV_STATE_PTR(nvl);
unsigned long flags;
NV_SPIN_LOCK_IRQSAVE(&nvl->snapshot_timer_lock, flags);
if (nvl->snapshot_callback != NULL)
{
nvl->snapshot_callback(nv->profiler_context);
mod_timer(&timer->kernel_timer, SNAPSHOT_TIMER_FREQ);
}
NV_SPIN_UNLOCK_IRQRESTORE(&nvl->snapshot_timer_lock, flags);
}
void NV_API_CALL nv_start_snapshot_timer(void (*snapshot_callback)(void *context))
{
nv_linux_state_t *nvl = &nv_ctl_device;
nvl->snapshot_callback = snapshot_callback;
nv_timer_setup(&nvl->snapshot_timer, snapshot_timer_callback);
mod_timer(&nvl->snapshot_timer.kernel_timer, SNAPSHOT_TIMER_FREQ);
}
void NV_API_CALL nv_stop_snapshot_timer(void)
{
nv_linux_state_t *nvl = &nv_ctl_device;
NvBool timer_active;
unsigned long flags;
NV_SPIN_LOCK_IRQSAVE(&nvl->snapshot_timer_lock, flags);
timer_active = nvl->snapshot_callback != NULL;
nvl->snapshot_callback = NULL;
NV_SPIN_UNLOCK_IRQRESTORE(&nvl->snapshot_timer_lock, flags);
if (timer_active)
del_timer_sync(&nvl->snapshot_timer.kernel_timer);
}
void NV_API_CALL nv_flush_snapshot_timer(void)
{
nv_linux_state_t *nvl = &nv_ctl_device;
nv_state_t *nv = NV_STATE_PTR(nvl);
unsigned long flags;
NV_SPIN_LOCK_IRQSAVE(&nvl->snapshot_timer_lock, flags);
if (nvl->snapshot_callback != NULL)
nvl->snapshot_callback(nv->profiler_context);
NV_SPIN_UNLOCK_IRQRESTORE(&nvl->snapshot_timer_lock, flags);
}
static int __init
nvos_count_devices(void)
{
int count;
count = nv_pci_count_devices();
return count;
}
NvBool nvos_is_chipset_io_coherent(void)
{
if (nv_chipset_is_io_coherent == NV_TRISTATE_INDETERMINATE)
{
nvidia_stack_t *sp = NULL;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
nv_printf(NV_DBG_ERRORS,
"NVRM: cannot allocate stack for platform coherence check callback \n");
WARN_ON(1);
return NV_FALSE;
}
nv_chipset_is_io_coherent = rm_is_chipset_io_coherent(sp);
nv_kmem_cache_free_stack(sp);
}
return nv_chipset_is_io_coherent;
}
#if defined(CONFIG_PM)
static NV_STATUS
nv_power_management(
nv_state_t *nv,
nv_pm_action_t pm_action
)
{
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
int status = NV_OK;
nvidia_stack_t *sp = NULL;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = nv_check_gpu_state(nv);
if (status == NV_ERR_GPU_IS_LOST)
{
NV_DEV_PRINTF(NV_DBG_INFO, nv, "GPU is lost, skipping PM event\n");
goto failure;
}
switch (pm_action)
{
case NV_PM_ACTION_STANDBY:
/* fall through */
case NV_PM_ACTION_HIBERNATE:
{
status = rm_power_management(sp, nv, pm_action);
nv_kthread_q_stop(&nvl->bottom_half_q);
nv_disable_pat_support();
break;
}
case NV_PM_ACTION_RESUME:
{
nv_enable_pat_support();
nv_kthread_q_item_init(&nvl->bottom_half_q_item,
nvidia_isr_bh_unlocked, (void *)nv);
status = nv_kthread_q_init(&nvl->bottom_half_q, nv_device_name);
if (status != NV_OK)
break;
status = rm_power_management(sp, nv, pm_action);
break;
}
default:
status = NV_ERR_INVALID_ARGUMENT;
break;
}
failure:
nv_kmem_cache_free_stack(sp);
return status;
}
static NV_STATUS
nv_restore_user_channels(
nv_state_t *nv
)
{
NV_STATUS status = NV_OK;
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
nv_stack_t *sp = NULL;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
down(&nvl->ldata_lock);
if ((nv->flags & NV_FLAG_OPEN) == 0)
{
goto done;
}
status = rm_restart_user_channels(sp, nv);
WARN_ON(status != NV_OK);
down(&nvl->mmap_lock);
nv_set_safe_to_mmap_locked(nv, NV_TRUE);
up(&nvl->mmap_lock);
rm_unref_dynamic_power(sp, nv, NV_DYNAMIC_PM_FINE);
done:
up(&nvl->ldata_lock);
nv_kmem_cache_free_stack(sp);
return status;
}
static NV_STATUS
nv_preempt_user_channels(
nv_state_t *nv
)
{
NV_STATUS status = NV_OK;
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
nv_stack_t *sp = NULL;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
down(&nvl->ldata_lock);
if ((nv->flags & NV_FLAG_OPEN) == 0)
{
goto done;
}
status = rm_ref_dynamic_power(sp, nv, NV_DYNAMIC_PM_FINE);
WARN_ON(status != NV_OK);
down(&nvl->mmap_lock);
nv_set_safe_to_mmap_locked(nv, NV_FALSE);
nv_revoke_gpu_mappings_locked(nv);
up(&nvl->mmap_lock);
status = rm_stop_user_channels(sp, nv);
WARN_ON(status != NV_OK);
done:
up(&nvl->ldata_lock);
nv_kmem_cache_free_stack(sp);
return status;
}
static NV_STATUS
nvidia_suspend(
struct device *dev,
nv_pm_action_t pm_action,
NvBool is_procfs_suspend
)
{
NV_STATUS status = NV_OK;
struct pci_dev *pci_dev = NULL;
nv_linux_state_t *nvl;
nv_state_t *nv;
if (nv_dev_is_pci(dev))
{
pci_dev = to_pci_dev(dev);
nvl = pci_get_drvdata(pci_dev);
}
else
{
nvl = dev_get_drvdata(dev);
}
nv = NV_STATE_PTR(nvl);
down(&nvl->ldata_lock);
if (((nv->flags & NV_FLAG_OPEN) == 0) &&
((nv->flags & NV_FLAG_PERSISTENT_SW_STATE) == 0))
{
goto done;
}
if ((nv->flags & NV_FLAG_SUSPENDED) != 0)
{
nvl->suspend_count++;
goto pci_pm;
}
if (nv->preserve_vidmem_allocations && !is_procfs_suspend)
{
NV_DEV_PRINTF(NV_DBG_ERRORS, nv,
"PreserveVideoMemoryAllocations module parameter is set. "
"System Power Management attempted without driver procfs suspend interface. "
"Please refer to the 'Configuring Power Management Support' section in the driver README.\n");
status = NV_ERR_NOT_SUPPORTED;
goto done;
}
nvidia_modeset_suspend(nv->gpu_id);
status = nv_power_management(nv, pm_action);
if (status != NV_OK)
{
nvidia_modeset_resume(nv->gpu_id);
goto done;
}
else
{
nv->flags |= NV_FLAG_SUSPENDED;
}
pci_pm:
/*
* Check if PCI power state should be D0 during system suspend. The PCI PM
* core will change the power state only if the driver has not saved the
* state in it's suspend callback.
*/
if ((nv->d0_state_in_suspend) && (pci_dev != NULL) &&
!is_procfs_suspend && (pm_action == NV_PM_ACTION_STANDBY))
{
pci_save_state(pci_dev);
}
done:
up(&nvl->ldata_lock);
return status;
}
static NV_STATUS
nvidia_resume(
struct device *dev,
nv_pm_action_t pm_action
)
{
NV_STATUS status = NV_OK;
struct pci_dev *pci_dev;
nv_linux_state_t *nvl;
nv_state_t *nv;
if (nv_dev_is_pci(dev))
{
pci_dev = to_pci_dev(dev);
nvl = pci_get_drvdata(pci_dev);
}
else
{
nvl = dev_get_drvdata(dev);
}
nv = NV_STATE_PTR(nvl);
down(&nvl->ldata_lock);
if ((nv->flags & NV_FLAG_SUSPENDED) == 0)
{
goto done;
}
if (nvl->suspend_count != 0)
{
nvl->suspend_count--;
}
else
{
status = nv_power_management(nv, pm_action);
if (status == NV_OK)
{
nvidia_modeset_resume(nv->gpu_id);
nv->flags &= ~NV_FLAG_SUSPENDED;
}
}
done:
up(&nvl->ldata_lock);
return status;
}
static NV_STATUS
nv_resume_devices(
nv_pm_action_t pm_action,
nv_pm_action_depth_t pm_action_depth
)
{
nv_linux_state_t *nvl;
NvBool resume_devices = NV_TRUE;
NV_STATUS status;
if (pm_action_depth == NV_PM_ACTION_DEPTH_MODESET)
{
goto resume_modeset;
}
if (pm_action_depth == NV_PM_ACTION_DEPTH_UVM)
{
resume_devices = NV_FALSE;
}
LOCK_NV_LINUX_DEVICES();
for (nvl = nv_linux_devices; nvl != NULL; nvl = nvl->next)
{
if (resume_devices)
{
status = nvidia_resume(nvl->dev, pm_action);
WARN_ON(status != NV_OK);
}
}
UNLOCK_NV_LINUX_DEVICES();
status = nv_uvm_resume();
WARN_ON(status != NV_OK);
LOCK_NV_LINUX_DEVICES();
for (nvl = nv_linux_devices; nvl != NULL; nvl = nvl->next)
{
status = nv_restore_user_channels(NV_STATE_PTR(nvl));
WARN_ON(status != NV_OK);
}
UNLOCK_NV_LINUX_DEVICES();
resume_modeset:
nvidia_modeset_resume(0);
return NV_OK;
}
static NV_STATUS
nv_suspend_devices(
nv_pm_action_t pm_action,
nv_pm_action_depth_t pm_action_depth
)
{
nv_linux_state_t *nvl;
NvBool resume_devices = NV_FALSE;
NV_STATUS status = NV_OK;
nvidia_modeset_suspend(0);
if (pm_action_depth == NV_PM_ACTION_DEPTH_MODESET)
{
return NV_OK;
}
LOCK_NV_LINUX_DEVICES();
for (nvl = nv_linux_devices; nvl != NULL && status == NV_OK; nvl = nvl->next)
{
status = nv_preempt_user_channels(NV_STATE_PTR(nvl));
WARN_ON(status != NV_OK);
}
UNLOCK_NV_LINUX_DEVICES();
if (status == NV_OK)
{
status = nv_uvm_suspend();
WARN_ON(status != NV_OK);
}
if (status != NV_OK)
{
goto done;
}
if (pm_action_depth == NV_PM_ACTION_DEPTH_UVM)
{
return NV_OK;
}
LOCK_NV_LINUX_DEVICES();
for (nvl = nv_linux_devices; nvl != NULL && status == NV_OK; nvl = nvl->next)
{
status = nvidia_suspend(nvl->dev, pm_action, NV_TRUE);
WARN_ON(status != NV_OK);
}
if (status != NV_OK)
{
resume_devices = NV_TRUE;
}
UNLOCK_NV_LINUX_DEVICES();
done:
if (status != NV_OK)
{
LOCK_NV_LINUX_DEVICES();
for (nvl = nv_linux_devices; nvl != NULL; nvl = nvl->next)
{
if (resume_devices)
{
nvidia_resume(nvl->dev, pm_action);
}
nv_restore_user_channels(NV_STATE_PTR(nvl));
}
UNLOCK_NV_LINUX_DEVICES();
}
return status;
}
NV_STATUS
nv_set_system_power_state(
nv_power_state_t power_state,
nv_pm_action_depth_t pm_action_depth
)
{
NV_STATUS status;
nv_pm_action_t pm_action;
switch (power_state)
{
case NV_POWER_STATE_IN_HIBERNATE:
pm_action = NV_PM_ACTION_HIBERNATE;
break;
case NV_POWER_STATE_IN_STANDBY:
pm_action = NV_PM_ACTION_STANDBY;
break;
case NV_POWER_STATE_RUNNING:
pm_action = NV_PM_ACTION_RESUME;
break;
default:
return NV_ERR_INVALID_ARGUMENT;
}
down(&nv_system_power_state_lock);
if (nv_system_power_state == power_state)
{
status = NV_OK;
goto done;
}
if (power_state == NV_POWER_STATE_RUNNING)
{
status = nv_resume_devices(pm_action, nv_system_pm_action_depth);
up_write(&nv_system_pm_lock);
}
else
{
if (nv_system_power_state != NV_POWER_STATE_RUNNING)
{
status = NV_ERR_INVALID_ARGUMENT;
goto done;
}
nv_system_pm_action_depth = pm_action_depth;
down_write(&nv_system_pm_lock);
status = nv_suspend_devices(pm_action, nv_system_pm_action_depth);
if (status != NV_OK)
{
up_write(&nv_system_pm_lock);
goto done;
}
}
nv_system_power_state = power_state;
done:
up(&nv_system_power_state_lock);
return status;
}
int nv_pmops_suspend(
struct device *dev
)
{
NV_STATUS status;
status = nvidia_suspend(dev, NV_PM_ACTION_STANDBY, NV_FALSE);
return (status == NV_OK) ? 0 : -EIO;
}
int nv_pmops_resume(
struct device *dev
)
{
NV_STATUS status;
status = nvidia_resume(dev, NV_PM_ACTION_RESUME);
return (status == NV_OK) ? 0 : -EIO;
}
int nv_pmops_freeze(
struct device *dev
)
{
NV_STATUS status;
status = nvidia_suspend(dev, NV_PM_ACTION_HIBERNATE, NV_FALSE);
return (status == NV_OK) ? 0 : -EIO;
}
int nv_pmops_thaw(
struct device *dev
)
{
return 0;
}
int nv_pmops_restore(
struct device *dev
)
{
NV_STATUS status;
status = nvidia_resume(dev, NV_PM_ACTION_RESUME);
return (status == NV_OK) ? 0 : -EIO;
}
int nv_pmops_poweroff(
struct device *dev
)
{
return 0;
}
static int
nvidia_transition_dynamic_power(
struct device *dev,
NvBool enter
)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
nv_linux_state_t *nvl = pci_get_drvdata(pci_dev);
nv_state_t *nv = NV_STATE_PTR(nvl);
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if ((nv->flags & (NV_FLAG_OPEN | NV_FLAG_PERSISTENT_SW_STATE)) == 0)
{
return 0;
}
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return -ENOMEM;
}
status = rm_transition_dynamic_power(sp, nv, enter);
nv_kmem_cache_free_stack(sp);
return (status == NV_OK) ? 0 : -EIO;
}
int nv_pmops_runtime_suspend(
struct device *dev
)
{
return nvidia_transition_dynamic_power(dev, NV_TRUE);
}
int nv_pmops_runtime_resume(
struct device *dev
)
{
return nvidia_transition_dynamic_power(dev, NV_FALSE);
}
#endif /* defined(CONFIG_PM) */
nv_state_t* NV_API_CALL nv_get_adapter_state(
NvU32 domain,
NvU8 bus,
NvU8 slot
)
{
nv_linux_state_t *nvl;
LOCK_NV_LINUX_DEVICES();
for (nvl = nv_linux_devices; nvl != NULL; nvl = nvl->next)
{
nv_state_t *nv = NV_STATE_PTR(nvl);
if (nv->pci_info.domain == domain && nv->pci_info.bus == bus
&& nv->pci_info.slot == slot)
{
UNLOCK_NV_LINUX_DEVICES();
return nv;
}
}
UNLOCK_NV_LINUX_DEVICES();
return NULL;
}
nv_state_t* NV_API_CALL nv_get_ctl_state(void)
{
return NV_STATE_PTR(&nv_ctl_device);
}
NV_STATUS NV_API_CALL nv_log_error(
nv_state_t *nv,
NvU32 error_number,
const char *format,
va_list ap
)
{
NV_STATUS status = NV_OK;
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
nv_report_error(nvl->pci_dev, error_number, format, ap);
#if defined(CONFIG_CRAY_XT)
status = nvos_forward_error_to_cray(nvl->pci_dev, error_number,
format, ap);
#endif
return status;
}
NvU64 NV_API_CALL nv_get_dma_start_address(
nv_state_t *nv
)
{
#if defined(NVCPU_PPC64LE)
struct pci_dev *pci_dev;
dma_addr_t dma_addr;
NvU64 saved_dma_mask;
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
/*
* If TCE bypass is disabled via a module parameter, then just return
* the default (which is 0).
*
* Otherwise, the DMA start address only needs to be set once, and it
* won't change afterward. Just return the cached value if asked again,
* to avoid the kernel printing redundant messages to the kernel
* log when we call pci_set_dma_mask().
*/
if ((nv_tce_bypass_mode == NV_TCE_BYPASS_MODE_DISABLE) ||
(nvl->tce_bypass_enabled))
{
return nvl->dma_dev.addressable_range.start;
}
pci_dev = nvl->pci_dev;
/*
* Linux on IBM POWER8 offers 2 different DMA set-ups, sometimes
* referred to as "windows".
*
* The "default window" provides a 2GB region of PCI address space
* located below the 32-bit line. The IOMMU is used to provide a
* "rich" mapping--any page in system memory can be mapped at an
* arbitrary address within this window. The mappings are dynamic
* and pass in and out of being as pci_map*()/pci_unmap*() calls
* are made.
*
* Dynamic DMA Windows (sometimes "Huge DDW") provides a linear
* mapping of the system's entire physical address space at some
* fixed offset above the 59-bit line. IOMMU is still used, and
* pci_map*()/pci_unmap*() are still required, but mappings are
* static. They're effectively set up in advance, and any given
* system page will always map to the same PCI bus address. I.e.
* physical 0x00000000xxxxxxxx => PCI 0x08000000xxxxxxxx
*
* This driver does not support the 2G default window because
* of its limited size, and for reasons having to do with UVM.
*
* Linux on POWER8 will only provide the DDW-style full linear
* mapping when the driver claims support for 64-bit DMA addressing
* (a pre-requisite because the PCI addresses used in this case will
* be near the top of the 64-bit range). The linear mapping
* is not available in all system configurations.
*
* Detect whether the linear mapping is present by claiming
* 64-bit support and then mapping physical page 0. For historical
* reasons, Linux on POWER8 will never map a page to PCI address 0x0.
* In the "default window" case page 0 will be mapped to some
* non-zero address below the 32-bit line. In the
* DDW/linear-mapping case, it will be mapped to address 0 plus
* some high-order offset.
*
* If the linear mapping is present and sane then return the offset
* as the starting address for all DMA mappings.
*/
saved_dma_mask = pci_dev->dma_mask;
if (pci_set_dma_mask(pci_dev, DMA_BIT_MASK(64)) != 0)
{
goto done;
}
dma_addr = pci_map_single(pci_dev, NULL, 1, DMA_BIDIRECTIONAL);
if (pci_dma_mapping_error(pci_dev, dma_addr))
{
pci_set_dma_mask(pci_dev, saved_dma_mask);
goto done;
}
pci_unmap_single(pci_dev, dma_addr, 1, DMA_BIDIRECTIONAL);
/*
* From IBM: "For IODA2, native DMA bypass or KVM TCE-based implementation
* of full 64-bit DMA support will establish a window in address-space
* with the high 14 bits being constant and the bottom up-to-50 bits
* varying with the mapping."
*
* Unfortunately, we don't have any good interfaces or definitions from
* the kernel to get information about the DMA offset assigned by OS.
* However, we have been told that the offset will be defined by the top
* 14 bits of the address, and bits 40-49 will not vary for any DMA
* mappings until 1TB of system memory is surpassed; this limitation is
* essential for us to function properly since our current GPUs only
* support 40 physical address bits. We are in a fragile place where we
* need to tell the OS that we're capable of 64-bit addressing, while
* relying on the assumption that the top 24 bits will not vary in this
* case.
*
* The way we try to compute the window, then, is mask the trial mapping
* against the DMA capabilities of the device. That way, devices with
* greater addressing capabilities will only take the bits it needs to
* define the window.
*/
if ((dma_addr & DMA_BIT_MASK(32)) != 0)
{
/*
* Huge DDW not available - page 0 mapped to non-zero address below
* the 32-bit line.
*/
nv_printf(NV_DBG_WARNINGS,
"NVRM: DMA window limited by platform\n");
pci_set_dma_mask(pci_dev, saved_dma_mask);
goto done;
}
else if ((dma_addr & saved_dma_mask) != 0)
{
NvU64 memory_size = os_get_num_phys_pages() * PAGE_SIZE;
if ((dma_addr & ~saved_dma_mask) !=
((dma_addr + memory_size) & ~saved_dma_mask))
{
/*
* The physical window straddles our addressing limit boundary,
* e.g., for an adapter that can address up to 1TB, the window
* crosses the 40-bit limit so that the lower end of the range
* has different bits 63:40 than the higher end of the range.
* We can only handle a single, static value for bits 63:40, so
* we must fall back here.
*/
nv_printf(NV_DBG_WARNINGS,
"NVRM: DMA window limited by memory size\n");
pci_set_dma_mask(pci_dev, saved_dma_mask);
goto done;
}
}
nvl->tce_bypass_enabled = NV_TRUE;
nvl->dma_dev.addressable_range.start = dma_addr & ~(saved_dma_mask);
/* Update the coherent mask to match */
dma_set_coherent_mask(&pci_dev->dev, pci_dev->dma_mask);
done:
return nvl->dma_dev.addressable_range.start;
#else
return 0;
#endif
}
NV_STATUS NV_API_CALL nv_set_primary_vga_status(
nv_state_t *nv
)
{
/* IORESOURCE_ROM_SHADOW wasn't added until 2.6.10 */
#if defined(IORESOURCE_ROM_SHADOW)
nv_linux_state_t *nvl;
struct pci_dev *pci_dev;
nvl = NV_GET_NVL_FROM_NV_STATE(nv);
pci_dev = nvl->pci_dev;
nv->primary_vga = ((NV_PCI_RESOURCE_FLAGS(pci_dev, PCI_ROM_RESOURCE) &
IORESOURCE_ROM_SHADOW) == IORESOURCE_ROM_SHADOW);
return NV_OK;
#else
return NV_ERR_NOT_SUPPORTED;
#endif
}
NV_STATUS NV_API_CALL nv_pci_trigger_recovery(
nv_state_t *nv
)
{
NV_STATUS status = NV_ERR_NOT_SUPPORTED;
#if defined(NV_PCI_ERROR_RECOVERY)
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
/*
* Calling readl() on PPC64LE will allow the kernel to check its state for
* the device and update it accordingly. This needs to be done before
* checking if the PCI channel is offline, so that we don't check stale
* state.
*
* This will also kick off the recovery process for the device.
*/
if (NV_PCI_ERROR_RECOVERY_ENABLED())
{
if (readl(nv->regs->map) == 0xFFFFFFFF)
{
if (pci_channel_offline(nvl->pci_dev))
{
NV_DEV_PRINTF(NV_DBG_ERRORS, nv,
"PCI channel for the device is offline\n");
status = NV_OK;
}
}
}
#endif
return status;
}
NvBool NV_API_CALL nv_requires_dma_remap(
nv_state_t *nv
)
{
NvBool dma_remap = NV_FALSE;
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
dma_remap = !nv_dma_maps_swiotlb(nvl->dev);
return dma_remap;
}
/*
* Intended for use by external kernel modules to list nvidia gpu ids.
*/
NvBool nvidia_get_gpuid_list(NvU32 *gpu_ids, NvU32 *gpu_count)
{
nv_linux_state_t *nvl;
unsigned int count;
NvBool ret = NV_TRUE;
LOCK_NV_LINUX_DEVICES();
count = 0;
for (nvl = nv_linux_devices; nvl != NULL; nvl = nvl->next)
count++;
if (*gpu_count == 0)
{
goto done;
}
else if ((*gpu_count) < count)
{
ret = NV_FALSE;
goto done;
}
count = 0;
for (nvl = nv_linux_devices; nvl != NULL; nvl = nvl->next)
{
nv_state_t *nv = NV_STATE_PTR(nvl);
gpu_ids[count++] = nv->gpu_id;
}
done:
*gpu_count = count;
UNLOCK_NV_LINUX_DEVICES();
return ret;
}
/*
* Kernel-level analog to nvidia_open, intended for use by external
* kernel modules. This increments the ref count of the device with
* the given gpu_id and makes sure the device has been initialized.
*
* Clients of this interface are counted by the RM reset path, to ensure a
* GPU is not reset while the GPU is active.
*
* Returns -ENODEV if the given gpu_id does not exist.
*/
int nvidia_dev_get(NvU32 gpu_id, nvidia_stack_t *sp)
{
nv_linux_state_t *nvl;
int rc;
/* Takes nvl->ldata_lock */
nvl = find_gpu_id(gpu_id);
if (!nvl)
return -ENODEV;
rc = nv_open_device(NV_STATE_PTR(nvl), sp);
if (rc == 0)
WARN_ON(rm_set_external_kernel_client_count(sp, NV_STATE_PTR(nvl), NV_TRUE) != NV_OK);
up(&nvl->ldata_lock);
return rc;
}
/*
* Kernel-level analog to nvidia_close, intended for use by external
* kernel modules. This decrements the ref count of the device with
* the given gpu_id, potentially tearing it down.
*/
void nvidia_dev_put(NvU32 gpu_id, nvidia_stack_t *sp)
{
nv_linux_state_t *nvl;
/* Takes nvl->ldata_lock */
nvl = find_gpu_id(gpu_id);
if (!nvl)
return;
nv_close_device(NV_STATE_PTR(nvl), sp);
WARN_ON(rm_set_external_kernel_client_count(sp, NV_STATE_PTR(nvl), NV_FALSE) != NV_OK);
up(&nvl->ldata_lock);
}
/*
* Like nvidia_dev_get but uses UUID instead of gpu_id. Note that this may
* trigger initialization and teardown of unrelated devices to look up their
* UUIDs.
*
* Clients of this interface are counted by the RM reset path, to ensure a
* GPU is not reset while the GPU is active.
*/
int nvidia_dev_get_uuid(const NvU8 *uuid, nvidia_stack_t *sp)
{
nv_state_t *nv = NULL;
nv_linux_state_t *nvl = NULL;
const NvU8 *dev_uuid;
int rc = 0;
/* Takes nvl->ldata_lock */
nvl = find_uuid_candidate(uuid);
while (nvl)
{
nv = NV_STATE_PTR(nvl);
/*
* If the device is missing its UUID, this call exists solely so
* rm_get_gpu_uuid_raw will be called and we can inspect the UUID.
*/
rc = nv_open_device(nv, sp);
if (rc != 0)
goto out;
/* The UUID should always be present following nv_open_device */
dev_uuid = nv_get_cached_uuid(nv);
WARN_ON(!dev_uuid);
if (dev_uuid && memcmp(dev_uuid, uuid, GPU_UUID_LEN) == 0)
break;
/* No match, try again. */
nv_close_device(nv, sp);
up(&nvl->ldata_lock);
nvl = find_uuid_candidate(uuid);
}
if (nvl)
{
rc = 0;
WARN_ON(rm_set_external_kernel_client_count(sp, NV_STATE_PTR(nvl), NV_TRUE) != NV_OK);
}
else
rc = -ENODEV;
out:
if (nvl)
up(&nvl->ldata_lock);
return rc;
}
/*
* Like nvidia_dev_put but uses UUID instead of gpu_id.
*/
void nvidia_dev_put_uuid(const NvU8 *uuid, nvidia_stack_t *sp)
{
nv_linux_state_t *nvl;
/* Callers must already have called nvidia_dev_get_uuid() */
/* Takes nvl->ldata_lock */
nvl = find_uuid(uuid);
if (!nvl)
return;
nv_close_device(NV_STATE_PTR(nvl), sp);
WARN_ON(rm_set_external_kernel_client_count(sp, NV_STATE_PTR(nvl), NV_FALSE) != NV_OK);
up(&nvl->ldata_lock);
}
int nvidia_dev_block_gc6(const NvU8 *uuid, nvidia_stack_t *sp)
{
nv_linux_state_t *nvl;
/* Callers must already have called nvidia_dev_get_uuid() */
/* Takes nvl->ldata_lock */
nvl = find_uuid(uuid);
if (!nvl)
return -ENODEV;
if (rm_ref_dynamic_power(sp, NV_STATE_PTR(nvl), NV_DYNAMIC_PM_FINE) != NV_OK)
{
up(&nvl->ldata_lock);
return -EINVAL;
}
up(&nvl->ldata_lock);
return 0;
}
int nvidia_dev_unblock_gc6(const NvU8 *uuid, nvidia_stack_t *sp)
{
nv_linux_state_t *nvl;
/* Callers must already have called nvidia_dev_get_uuid() */
/* Takes nvl->ldata_lock */
nvl = find_uuid(uuid);
if (!nvl)
return -ENODEV;
rm_unref_dynamic_power(sp, NV_STATE_PTR(nvl), NV_DYNAMIC_PM_FINE);
up(&nvl->ldata_lock);
return 0;
}
NV_STATUS NV_API_CALL nv_get_device_memory_config(
nv_state_t *nv,
NvU64 *compr_addr_sys_phys,
NvU64 *addr_guest_phys,
NvU32 *addr_width,
NvU32 *granularity,
NvS32 *node_id
)
{
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
NV_STATUS status = NV_ERR_NOT_SUPPORTED;
if (!nv_platform_supports_numa(nvl))
{
return NV_ERR_NOT_SUPPORTED;
}
#if defined(NVCPU_PPC64LE)
nv_npu_numa_info_t *numa_info;
numa_info = &nvl->npu->numa_info;
if (node_id != NULL)
{
*node_id = nvl->numa_info.node_id;
}
if (compr_addr_sys_phys != NULL)
{
*compr_addr_sys_phys =
numa_info->compr_sys_phys_addr;
}
if (addr_guest_phys != NULL)
{
*addr_guest_phys =
numa_info->guest_phys_addr;
}
if (addr_width != NULL)
{
*addr_width = nv_volta_dma_addr_size - nv_volta_addr_space_width;
}
if (granularity != NULL)
{
*granularity = nv_volta_addr_space_width;
}
status = NV_OK;
#endif
return status;
}
#if defined(NVCPU_PPC64LE)
NV_STATUS NV_API_CALL nv_get_nvlink_line_rate(
nv_state_t *nvState,
NvU32 *linerate
)
{
#if defined(NV_PNV_PCI_GET_NPU_DEV_PRESENT) && defined(NV_OF_GET_PROPERTY_PRESENT)
nv_linux_state_t *nvl;
struct pci_dev *npuDev;
NvU32 *pSpeedPtr = NULL;
NvU32 speed;
int len;
if (nvState != NULL)
nvl = NV_GET_NVL_FROM_NV_STATE(nvState);
else
return NV_ERR_INVALID_ARGUMENT;
if (!nvl->npu)
{
return NV_ERR_NOT_SUPPORTED;
}
npuDev = nvl->npu->devs[0];
if (!npuDev->dev.of_node)
{
nv_printf(NV_DBG_ERRORS, "NVRM: %s: OF Node not found in IBM-NPU device node\n",
__FUNCTION__);
return NV_ERR_NOT_SUPPORTED;
}
pSpeedPtr = (NvU32 *) of_get_property(npuDev->dev.of_node, "ibm,nvlink-speed", &len);
if (pSpeedPtr)
{
speed = (NvU32) be32_to_cpup(pSpeedPtr);
}
else
{
return NV_ERR_NOT_SUPPORTED;
}
if (!speed)
{
return NV_ERR_NOT_SUPPORTED;
}
else
{
*linerate = speed;
}
return NV_OK;
#endif
return NV_ERR_NOT_SUPPORTED;
}
#endif
NV_STATUS NV_API_CALL nv_indicate_idle(
nv_state_t *nv
)
{
#if defined(NV_PM_RUNTIME_AVAILABLE)
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
struct device *dev = nvl->dev;
struct file *file = nvl->sysfs_config_file;
loff_t f_pos = 0;
char buf;
pm_runtime_put_noidle(dev);
#if defined(NV_SEQ_READ_ITER_PRESENT)
{
struct kernfs_open_file *of = ((struct seq_file *)file->private_data)->private;
struct kernfs_node *kn;
mutex_lock(&of->mutex);
kn = of->kn;
if (kn != NULL && atomic_inc_unless_negative(&kn->active))
{
if ((kn->attr.ops != NULL) && (kn->attr.ops->read != NULL))
{
kn->attr.ops->read(of, &buf, 1, f_pos);
}
atomic_dec(&kn->active);
}
mutex_unlock(&of->mutex);
}
#else
#if defined(NV_KERNEL_READ_HAS_POINTER_POS_ARG)
kernel_read(file, &buf, 1, &f_pos);
#else
kernel_read(file, f_pos, &buf, 1);
#endif
#endif
return NV_OK;
#else
return NV_ERR_NOT_SUPPORTED;
#endif
}
NV_STATUS NV_API_CALL nv_indicate_not_idle(
nv_state_t *nv
)
{
#if defined(NV_PM_RUNTIME_AVAILABLE)
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
struct device *dev = nvl->dev;
pm_runtime_get_noresume(dev);
nvl->is_forced_shutdown = NV_TRUE;
pci_bus_type.shutdown(dev);
return NV_OK;
#else
return NV_ERR_NOT_SUPPORTED;
#endif
}
void NV_API_CALL nv_idle_holdoff(
nv_state_t *nv
)
{
#if defined(NV_PM_RUNTIME_AVAILABLE)
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
struct device *dev = nvl->dev;
pm_runtime_get_noresume(dev);
#endif
}
NvBool NV_API_CALL nv_dynamic_power_available(
nv_state_t *nv
)
{
#if defined(NV_PM_RUNTIME_AVAILABLE)
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
return nvl->sysfs_config_file != NULL;
#else
return NV_FALSE;
#endif
}
/* caller should hold nv_linux_devices_lock using LOCK_NV_LINUX_DEVICES */
void nv_linux_add_device_locked(nv_linux_state_t *nvl)
{
if (nv_linux_devices == NULL) {
nv_linux_devices = nvl;
}
else
{
nv_linux_state_t *tnvl;
for (tnvl = nv_linux_devices; tnvl->next != NULL; tnvl = tnvl->next);
tnvl->next = nvl;
}
}
/* caller should hold nv_linux_devices_lock using LOCK_NV_LINUX_DEVICES */
void nv_linux_remove_device_locked(nv_linux_state_t *nvl)
{
if (nvl == nv_linux_devices) {
nv_linux_devices = nvl->next;
}
else
{
nv_linux_state_t *tnvl;
for (tnvl = nv_linux_devices; tnvl->next != nvl; tnvl = tnvl->next);
tnvl->next = nvl->next;
}
}
void NV_API_CALL nv_control_soc_irqs(nv_state_t *nv, NvBool bEnable)
{
int count;
if (bEnable)
{
for (count = 0; count < nv->num_soc_irqs; count++)
{
nv->soc_irq_info[count].bh_pending = NV_FALSE;
nv->current_soc_irq = -1;
enable_irq(nv->soc_irq_info[count].irq_num);
}
}
else
{
for (count = 0; count < nv->num_soc_irqs; count++)
{
disable_irq_nosync(nv->soc_irq_info[count].irq_num);
}
}
}
NvU32 NV_API_CALL nv_get_dev_minor(nv_state_t *nv)
{
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
return nvl->minor_num;
}
NV_STATUS NV_API_CALL nv_acquire_fabric_mgmt_cap(int fd, int *duped_fd)
{
*duped_fd = nvlink_cap_acquire(fd, NVLINK_CAP_FABRIC_MANAGEMENT);
if (*duped_fd < 0)
{
return NV_ERR_INSUFFICIENT_PERMISSIONS;
}
return NV_OK;
}
/*
* Wakes up the NVIDIA GPU HDA codec and contoller by reading
* codec proc file.
*/
void NV_API_CALL nv_audio_dynamic_power(
nv_state_t *nv
)
{
/*
* The runtime power management for nvidia HDA controller can be possible
* after commit 07f4f97d7b4b ("vga_switcheroo: Use device link for HDA
* controller"). This commit has also moved 'PCI_CLASS_MULTIMEDIA_HD_AUDIO'
* macro from <sound/hdaudio.h> to <linux/pci_ids.h>.
* If 'NV_PCI_CLASS_MULTIMEDIA_HD_AUDIO_PRESENT' is not defined, then
* this function will be stub function.
*
* Also, check if runtime PM is enabled in the kernel (with
* 'NV_PM_RUNTIME_AVAILABLE') and stub this function if it is disabled. This
* function uses kernel fields only present when the kconfig has runtime PM
* enabled.
*/
#if defined(NV_PCI_CLASS_MULTIMEDIA_HD_AUDIO_PRESENT) && defined(NV_PM_RUNTIME_AVAILABLE)
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
struct device *dev = nvl->dev;
struct pci_dev *audio_pci_dev, *pci_dev;
struct snd_card *card;
if (!nv_dev_is_pci(dev))
return;
pci_dev = to_pci_dev(dev);
audio_pci_dev = os_pci_init_handle(NV_PCI_DOMAIN_NUMBER(pci_dev),
NV_PCI_BUS_NUMBER(pci_dev),
NV_PCI_SLOT_NUMBER(pci_dev),
1, NULL, NULL);
if (audio_pci_dev == NULL)
return;
/*
* Check if HDA controller is in pm suspended state. The HDA contoller
* can not be runtime resumed if this API is called during system
* suspend/resume time and HDA controller is in pm suspended state.
*/
if (audio_pci_dev->dev.power.is_suspended)
return;
card = pci_get_drvdata(audio_pci_dev);
if (card == NULL)
return;
/*
* Commit be57bfffb7b5 ("ALSA: hda: move hda_codec.h to include/sound")
* in v4.20-rc1 moved "hda_codec.h" header file from the private sound
* folder to include/sound.
*/
#if defined(NV_SOUND_HDA_CODEC_H_PRESENT)
{
struct list_head *p;
struct hda_codec *codec = NULL;
unsigned int cmd, res;
/*
* Traverse the list of devices which the sound card maintains and
* search for HDA codec controller.
*/
list_for_each_prev(p, &card->devices)
{
struct snd_device *pdev = list_entry(p, struct snd_device, list);
if (pdev->type == SNDRV_DEV_CODEC)
{
codec = pdev->device_data;
/*
* NVIDIA HDA codec controller uses linux kernel HDA codec
* driver. Commit 05852448690d ("ALSA: hda - Support indirect
* execution of verbs") added support for overriding exec_verb.
* This codec->core.exec_verb will be codec_exec_verb() for
* NVIDIA HDA codec driver.
*/
if (codec->core.exec_verb == NULL)
{
return;
}
break;
}
}
if (codec == NULL)
{
return;
}
/* If HDA codec controller is already runtime active, then return */
if (snd_hdac_is_power_on(&codec->core))
{
return;
}
/*
* Encode codec verb for getting vendor ID from root node.
* Refer Intel High Definition Audio Specification for more details.
*/
cmd = (codec->addr << 28) | (AC_NODE_ROOT << 20) |
(AC_VERB_PARAMETERS << 8) | AC_PAR_VENDOR_ID;
/*
* It will internally increment the runtime PM refcount,
* wake-up the audio codec controller and send the HW
* command for getting vendor ID. Once the vendor ID will be
* returned back, then it will decrement the runtime PM refcount
* and runtime suspend audio codec controller again (If refcount is
* zero) once auto suspend counter expires.
*/
codec->core.exec_verb(&codec->core, cmd, 0, &res);
}
#else
{
int codec_addr;
/*
* The filp_open() call below depends on the current task's fs_struct
* (current->fs), which may already be NULL if this is called during
* process teardown.
*/
if (current->fs == NULL)
return;
/* If device is runtime active, then return */
if (audio_pci_dev->dev.power.runtime_status == RPM_ACTIVE)
return;
for (codec_addr = 0; codec_addr < NV_HDA_MAX_CODECS; codec_addr++)
{
char filename[48];
NvU8 buf;
int ret;
ret = snprintf(filename, sizeof(filename),
"/proc/asound/card%d/codec#%d",
card->number, codec_addr);
if (ret > 0 && ret < sizeof(filename) &&
(os_open_and_read_file(filename, &buf, 1) == NV_OK))
{
break;
}
}
}
#endif
#endif
}
static int nv_match_dev_state(const void *data, struct file *filp, unsigned fd)
{
nv_linux_state_t *nvl = NULL;
dev_t rdev = 0;
if (filp == NULL ||
filp->private_data == NULL ||
NV_FILE_INODE(filp) == NULL)
return 0;
rdev = (NV_FILE_INODE(filp))->i_rdev;
if (MAJOR(rdev) != NV_MAJOR_DEVICE_NUMBER)
return 0;
nvl = NV_GET_NVL_FROM_FILEP(filp);
if (nvl == NULL)
return 0;
return (data == nvl);
}
NvBool NV_API_CALL nv_is_gpu_accessible(nv_state_t *nv)
{
struct files_struct *files = current->files;
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
#ifdef NV_ITERATE_FD_PRESENT
return !!iterate_fd(files, 0, nv_match_dev_state, nvl);
#else
struct fdtable *fdtable;
int ret_val = 0;
int fd = 0;
if (files == NULL)
return 0;
spin_lock(&files->file_lock);
for (fdtable = files_fdtable(files); fd < fdtable->max_fds; fd++)
{
struct file *filp;
#ifdef READ_ONCE
filp = READ_ONCE(fdtable->fd[fd]);
#else
filp = ACCESS_ONCE(fdtable->fd[fd]);
smp_read_barrier_depends();
#endif
if (filp == NULL)
continue;
ret_val = nv_match_dev_state(nvl, filp, fd);
if (ret_val)
break;
}
spin_unlock(&files->file_lock);
return !!ret_val;
#endif
}
NvBool NV_API_CALL nv_platform_supports_s0ix(void)
{
#if defined(CONFIG_ACPI)
return (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) != 0;
#else
return NV_FALSE;
#endif
}
NvBool NV_API_CALL nv_s2idle_pm_configured(void)
{
NvU8 buf[8];
#if defined(NV_SEQ_READ_ITER_PRESENT)
struct file *file;
ssize_t num_read;
struct kiocb kiocb;
struct iov_iter iter;
struct kvec iov = {
.iov_base = &buf,
.iov_len = sizeof(buf),
};
if (os_open_readonly_file("/sys/power/mem_sleep", (void **)&file) != NV_OK)
{
return NV_FALSE;
}
/*
* init_sync_kiocb() internally uses GPL licensed __get_task_ioprio() from
* v5.20-rc1.
*/
#if defined(NV_GET_TASK_IOPRIO_PRESENT)
memset(&kiocb, 0, sizeof(kiocb));
kiocb.ki_filp = file;
kiocb.ki_flags = iocb_flags(file);
kiocb.ki_ioprio = IOPRIO_DEFAULT;
#else
init_sync_kiocb(&kiocb, file);
#endif
kiocb.ki_pos = 0;
iov_iter_kvec(&iter, READ, &iov, 1, sizeof(buf));
num_read = seq_read_iter(&kiocb, &iter);
os_close_file((void *)file);
if (num_read != sizeof(buf))
{
return NV_FALSE;
}
#else
if (os_open_and_read_file("/sys/power/mem_sleep", buf,
sizeof(buf)) != NV_OK)
{
return NV_FALSE;
}
#endif
return (memcmp(buf, "[s2idle]", 8) == 0);
}
/*
* Function query system chassis info, to figure out if the platform is
* Laptop or Notebook.
* This function should be used when querying GPU form factor information is
* not possible via core RM or if querying both system and GPU form factor
* information is necessary.
*/
NvBool NV_API_CALL nv_is_chassis_notebook(void)
{
const char *chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);
//
// Return true only for Laptop & Notebook
// As per SMBIOS spec Laptop = 9 and Notebook = 10
//
return (chassis_type && (!strcmp(chassis_type, "9") || !strcmp(chassis_type, "10")));
}
void NV_API_CALL nv_allow_runtime_suspend
(
nv_state_t *nv
)
{
#if defined(NV_PM_RUNTIME_AVAILABLE)
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
struct device *dev = nvl->dev;
spin_lock_irq(&dev->power.lock);
if (dev->power.runtime_auto == false)
{
dev->power.runtime_auto = true;
atomic_add_unless(&dev->power.usage_count, -1, 0);
}
spin_unlock_irq(&dev->power.lock);
#endif
}
void NV_API_CALL nv_disallow_runtime_suspend
(
nv_state_t *nv
)
{
#if defined(NV_PM_RUNTIME_AVAILABLE)
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
struct device *dev = nvl->dev;
spin_lock_irq(&dev->power.lock);
if (dev->power.runtime_auto == true)
{
dev->power.runtime_auto = false;
atomic_inc(&dev->power.usage_count);
}
spin_unlock_irq(&dev->power.lock);
#endif
}
NvU32 NV_API_CALL nv_get_os_type(void)
{
return OS_TYPE_LINUX;
}
void NV_API_CALL nv_flush_coherent_cpu_cache_range(nv_state_t *nv, NvU64 cpu_virtual, NvU64 size)
{
#if NVCPU_IS_PPC64LE
return nv_ibmnpu_cache_flush_range(nv, cpu_virtual, size);
#elif NVCPU_IS_AARCH64
NvU64 va, cbsize;
NvU64 end_cpu_virtual = cpu_virtual + size;
nv_printf(NV_DBG_INFO,
"Flushing CPU virtual range [0x%llx, 0x%llx)\n",
cpu_virtual, end_cpu_virtual);
cbsize = cache_line_size();
// Align address to line size
cpu_virtual = NV_ALIGN_UP(cpu_virtual, cbsize);
// Force eviction of any cache lines from the NUMA-onlined region.
for (va = cpu_virtual; va < end_cpu_virtual; va += cbsize)
{
asm volatile("dc civac, %0" : : "r" (va): "memory");
// Reschedule if necessary to avoid lockup warnings
cond_resched();
}
asm volatile("dsb sy" : : : "memory");
#endif
}
static struct resource *nv_next_resource(struct resource *p)
{
if (p->child != NULL)
return p->child;
while ((p->sibling == NULL) && (p->parent != NULL))
p = p->parent;
return p->sibling;
}
/*
* Function to get the correct PCI Bus memory window which can be mapped
* in the real mode emulator (emu).
* The function gets called during the initialization of the emu before
* remapping it to OS.
*/
void NV_API_CALL nv_get_updated_emu_seg(
NvU32 *start,
NvU32 *end
)
{
struct resource *p;
if (*start >= *end)
return;
for (p = iomem_resource.child; (p != NULL); p = nv_next_resource(p))
{
/* If we passed the resource we are looking for, stop */
if (p->start > *end)
{
p = NULL;
break;
}
/* Skip until we find a range that matches what we look for */
if (p->end < *start)
continue;
if ((p->end > *end) && (p->child))
continue;
if ((p->flags & IORESOURCE_MEM) != IORESOURCE_MEM)
continue;
/* Found a match, break */
break;
}
if (p != NULL)
{
*start = max((resource_size_t)*start, p->start);
*end = min((resource_size_t)*end, p->end);
}
}
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