/* * Copyright 2008 Advanced Micro Devices, Inc. * Copyright 2008 Red Hat Inc. * Copyright 2009 Jerome Glisse. * * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 <linux/kthread.h>#include <linux/pci.h>#include <linux/uaccess.h>#include <linux/pm_runtime.h>#include <linux/poll.h>#include <drm/drm_debugfs.h> #include "amdgpu.h"#include "amdgpu_pm.h"#include "amdgpu_dm_debugfs.h"#include "amdgpu_ras.h" /** * amdgpu_debugfs_add_files - Add simple debugfs entries * * @adev:  Device to attach debugfs entries to * @files:  Array of function callbacks that respond to reads * @nfiles: Number of callbacks to register * */int amdgpu_debugfs_add_files(struct amdgpu_device *adev,			     const struct drm_info_list *files,			     unsigned nfiles){	unsigned i; 	for (i = 0; i < adev->debugfs_count; i++) {		if (adev->debugfs[i].files == files) {			/* Already registered */			return 0;		}	} 	i = adev->debugfs_count + 1;	if (i > AMDGPU_DEBUGFS_MAX_COMPONENTS) {		DRM_ERROR("Reached maximum number of debugfs components.\n");		DRM_ERROR("Report so we increase "			  "AMDGPU_DEBUGFS_MAX_COMPONENTS.\n");		return -EINVAL;	}	adev->debugfs[adev->debugfs_count].files = files;	adev->debugfs[adev->debugfs_count].num_files = nfiles;	adev->debugfs_count = i;#if defined(CONFIG_DEBUG_FS)	drm_debugfs_create_files(files, nfiles,				 adev->ddev->primary->debugfs_root,				 adev->ddev->primary);#endif	return 0;} int amdgpu_debugfs_wait_dump(struct amdgpu_device *adev){#if defined(CONFIG_DEBUG_FS)	unsigned long timeout = 600 * HZ;	int ret; 	wake_up_interruptible(&adev->autodump.gpu_hang); 	ret = wait_for_completion_interruptible_timeout(&adev->autodump.dumping, timeout);	if (ret == 0) {		pr_err("autodump: timeout, move on to gpu recovery\n");		return -ETIMEDOUT;	}#endif	return 0;} #if defined(CONFIG_DEBUG_FS) static int amdgpu_debugfs_autodump_open(struct inode *inode, struct file *file){	struct amdgpu_device *adev = inode->i_private;	int ret; 	file->private_data = adev; 	mutex_lock(&adev->lock_reset);	if (adev->autodump.dumping.done) {		reinit_completion(&adev->autodump.dumping);		ret = 0;	} else {		ret = -EBUSY;	}	mutex_unlock(&adev->lock_reset); 	return ret;} static int amdgpu_debugfs_autodump_release(struct inode *inode, struct file *file){	struct amdgpu_device *adev = file->private_data; 	complete_all(&adev->autodump.dumping);	return 0;} static unsigned int amdgpu_debugfs_autodump_poll(struct file *file, struct poll_table_struct *poll_table){	struct amdgpu_device *adev = file->private_data; 	poll_wait(file, &adev->autodump.gpu_hang, poll_table); 	if (adev->in_gpu_reset)		return POLLIN | POLLRDNORM | POLLWRNORM; 	return 0;} static const struct file_operations autodump_debug_fops = {	.owner = THIS_MODULE,	.open = amdgpu_debugfs_autodump_open,	.poll = amdgpu_debugfs_autodump_poll,	.release = amdgpu_debugfs_autodump_release,}; static void amdgpu_debugfs_autodump_init(struct amdgpu_device *adev){	init_completion(&adev->autodump.dumping);	complete_all(&adev->autodump.dumping);	init_waitqueue_head(&adev->autodump.gpu_hang); 	debugfs_create_file("amdgpu_autodump", 0600,		adev->ddev->primary->debugfs_root,		adev, &autodump_debug_fops);} /** * amdgpu_debugfs_process_reg_op - Handle MMIO register reads/writes * * @read: True if reading * @f: open file handle * @buf: User buffer to write/read to * @size: Number of bytes to write/read * @pos:  Offset to seek to * * This debugfs entry has special meaning on the offset being sought. * Various bits have different meanings: * * Bit 62:  Indicates a GRBM bank switch is needed * Bit 61:  Indicates a SRBM bank switch is needed (implies bit 62 is * 			zero) * Bits 24..33: The SE or ME selector if needed * Bits 34..43: The SH (or SA) or PIPE selector if needed * Bits 44..53: The INSTANCE (or CU/WGP) or QUEUE selector if needed * * Bit 23:  Indicates that the PM power gating lock should be held * 			This is necessary to read registers that might be * 			unreliable during a power gating transistion. * * The lower bits are the BYTE offset of the register to read.  This * allows reading multiple registers in a single call and having * the returned size reflect that. */static int  amdgpu_debugfs_process_reg_op(bool read, struct file *f,		char __user *buf, size_t size, loff_t *pos){	struct amdgpu_device *adev = file_inode(f)->i_private;	ssize_t result = 0;	int r;	bool pm_pg_lock, use_bank, use_ring;	unsigned instance_bank, sh_bank, se_bank, me, pipe, queue, vmid; 	pm_pg_lock = use_bank = use_ring = false;	instance_bank = sh_bank = se_bank = me = pipe = queue = vmid = 0; 	if (size & 0x3 || *pos & 0x3 ||			((*pos & (1ULL << 62)) && (*pos & (1ULL << 61))))		return -EINVAL; 	/* are we reading registers for which a PG lock is necessary? */	pm_pg_lock = (*pos >> 23) & 1; 	if (*pos & (1ULL << 62)) {		se_bank = (*pos & GENMASK_ULL(33, 24)) >> 24;		sh_bank = (*pos & GENMASK_ULL(43, 34)) >> 34;		instance_bank = (*pos & GENMASK_ULL(53, 44)) >> 44; 		if (se_bank == 0x3FF)			se_bank = 0xFFFFFFFF;		if (sh_bank == 0x3FF)			sh_bank = 0xFFFFFFFF;		if (instance_bank == 0x3FF)			instance_bank = 0xFFFFFFFF;		use_bank = true;	} else if (*pos & (1ULL << 61)) { 		me = (*pos & GENMASK_ULL(33, 24)) >> 24;		pipe = (*pos & GENMASK_ULL(43, 34)) >> 34;		queue = (*pos & GENMASK_ULL(53, 44)) >> 44;		vmid = (*pos & GENMASK_ULL(58, 54)) >> 54; 		use_ring = true;	} else {		use_bank = use_ring = false;	} 	*pos &= (1UL << 22) - 1; 	r = pm_runtime_get_sync(adev->ddev->dev);	if (r < 0) {		pm_runtime_put_autosuspend(adev->ddev->dev);		return r;	} 	r = amdgpu_virt_enable_access_debugfs(adev);	if (r < 0) {		pm_runtime_put_autosuspend(adev->ddev->dev);		return r;	} 	if (use_bank) {		if ((sh_bank != 0xFFFFFFFF && sh_bank >= adev->gfx.config.max_sh_per_se) ||		    (se_bank != 0xFFFFFFFF && se_bank >= adev->gfx.config.max_shader_engines)) {			pm_runtime_mark_last_busy(adev->ddev->dev);			pm_runtime_put_autosuspend(adev->ddev->dev);			amdgpu_virt_disable_access_debugfs(adev);			return -EINVAL;		}		mutex_lock(&adev->grbm_idx_mutex);		amdgpu_gfx_select_se_sh(adev, se_bank,					sh_bank, instance_bank);	} else if (use_ring) {		mutex_lock(&adev->srbm_mutex);		amdgpu_gfx_select_me_pipe_q(adev, me, pipe, queue, vmid);	} 	if (pm_pg_lock)		mutex_lock(&adev->pm.mutex); 	while (size) {		uint32_t value; 		if (read) {			value = RREG32(*pos >> 2);			r = put_user(value, (uint32_t *)buf);		} else {			r = get_user(value, (uint32_t *)buf);			if (!r)				amdgpu_mm_wreg_mmio_rlc(adev, *pos >> 2, value, 0);		}		if (r) {			result = r;			goto end;		} 		result += 4;		buf += 4;		*pos += 4;		size -= 4;	} end:	if (use_bank) {		amdgpu_gfx_select_se_sh(adev, 0xffffffff, 0xffffffff, 0xffffffff);		mutex_unlock(&adev->grbm_idx_mutex);	} else if (use_ring) {		amdgpu_gfx_select_me_pipe_q(adev, 0, 0, 0, 0);		mutex_unlock(&adev->srbm_mutex);	} 	if (pm_pg_lock)		mutex_unlock(&adev->pm.mutex); 	pm_runtime_mark_last_busy(adev->ddev->dev);	pm_runtime_put_autosuspend(adev->ddev->dev); 	amdgpu_virt_disable_access_debugfs(adev);	return result;} /** * amdgpu_debugfs_regs_read - Callback for reading MMIO registers */static ssize_t amdgpu_debugfs_regs_read(struct file *f, char __user *buf,					size_t size, loff_t *pos){	return amdgpu_debugfs_process_reg_op(true, f, buf, size, pos);} /** * amdgpu_debugfs_regs_write - Callback for writing MMIO registers */static ssize_t amdgpu_debugfs_regs_write(struct file *f, const char __user *buf,					 size_t size, loff_t *pos){	return amdgpu_debugfs_process_reg_op(false, f, (char __user *)buf, size, pos);}  /** * amdgpu_debugfs_regs_pcie_read - Read from a PCIE register * * @f: open file handle * @buf: User buffer to store read data in * @size: Number of bytes to read * @pos:  Offset to seek to * * The lower bits are the BYTE offset of the register to read.  This * allows reading multiple registers in a single call and having * the returned size reflect that. */static ssize_t amdgpu_debugfs_regs_pcie_read(struct file *f, char __user *buf,					size_t size, loff_t *pos){	struct amdgpu_device *adev = file_inode(f)->i_private;	ssize_t result = 0;	int r; 	if (size & 0x3 || *pos & 0x3)		return -EINVAL; 	r = pm_runtime_get_sync(adev->ddev->dev);	if (r < 0) {		pm_runtime_put_autosuspend(adev->ddev->dev);		return r;	} 	r = amdgpu_virt_enable_access_debugfs(adev);	if (r < 0) {		pm_runtime_put_autosuspend(adev->ddev->dev);		return r;	} 	while (size) {		uint32_t value; 		value = RREG32_PCIE(*pos >> 2);		r = put_user(value, (uint32_t *)buf);		if (r) {			pm_runtime_mark_last_busy(adev->ddev->dev);			pm_runtime_put_autosuspend(adev->ddev->dev);			amdgpu_virt_disable_access_debugfs(adev);			return r;		} 		result += 4;		buf += 4;		*pos += 4;		size -= 4;	} 	pm_runtime_mark_last_busy(adev->ddev->dev);	pm_runtime_put_autosuspend(adev->ddev->dev); 	amdgpu_virt_disable_access_debugfs(adev);	return result;} /** * amdgpu_debugfs_regs_pcie_write - Write to a PCIE register * * @f: open file handle * @buf: User buffer to write data from * @size: Number of bytes to write * @pos:  Offset to seek to * * The lower bits are the BYTE offset of the register to write.  This * allows writing multiple registers in a single call and having * the returned size reflect that. */static ssize_t amdgpu_debugfs_regs_pcie_write(struct file *f, const char __user *buf,					 size_t size, loff_t *pos){	struct amdgpu_device *adev = file_inode(f)->i_private;	ssize_t result = 0;	int r; 	if (size & 0x3 || *pos & 0x3)		return -EINVAL; 	r = pm_runtime_get_sync(adev->ddev->dev);	if (r < 0) {		pm_runtime_put_autosuspend(adev->ddev->dev);		return r;	} 	r = amdgpu_virt_enable_access_debugfs(adev);	if (r < 0) {		pm_runtime_put_autosuspend(adev->ddev->dev);		return r;	} 	while (size) {		uint32_t value; 		r = get_user(value, (uint32_t *)buf);		if (r) {			pm_runtime_mark_last_busy(adev->ddev->dev);			pm_runtime_put_autosuspend(adev->ddev->dev);			amdgpu_virt_disable_access_debugfs(adev);			return r;		} 		WREG32_PCIE(*pos >> 2, value); 		result += 4;		buf += 4;		*pos += 4;		size -= 4;	} 	pm_runtime_mark_last_busy(adev->ddev->dev);	pm_runtime_put_autosuspend(adev->ddev->dev); 	amdgpu_virt_disable_access_debugfs(adev);	return result;} /** * amdgpu_debugfs_regs_didt_read - Read from a DIDT register * * @f: open file handle * @buf: User buffer to store read data in * @size: Number of bytes to read * @pos:  Offset to seek to * * The lower bits are the BYTE offset of the register to read.  This * allows reading multiple registers in a single call and having * the returned size reflect that. */static ssize_t amdgpu_debugfs_regs_didt_read(struct file *f, char __user *buf,					size_t size, loff_t *pos){	struct amdgpu_device *adev = file_inode(f)->i_private;	ssize_t result = 0;	int r; 	if (size & 0x3 || *pos & 0x3)		return -EINVAL; 	r = pm_runtime_get_sync(adev->ddev->dev);	if (r < 0) {		pm_runtime_put_autosuspend(adev->ddev->dev);		return r;	} 	r = amdgpu_virt_enable_access_debugfs(adev);	if (r < 0) {		pm_runtime_put_autosuspend(adev->ddev->dev);		return r;	} 	while (size) {		uint32_t value; 		value = RREG32_DIDT(*pos >> 2);		r = put_user(value, (uint32_t *)buf);		if (r) {			pm_runtime_mark_last_busy(adev->ddev->dev);			pm_runtime_put_autosuspend(adev->ddev->dev);			amdgpu_virt_disable_access_debugfs(adev);			return r;		} 		result += 4;		buf += 4;		*pos += 4;		size -= 4;	} 	pm_runtime_mark_last_busy(adev->ddev->dev);	pm_runtime_put_autosuspend(adev->ddev->dev); 	amdgpu_virt_disable_access_debugfs(adev);	return result;} /** * amdgpu_debugfs_regs_didt_write - Write to a DIDT register * * @f: open file handle * @buf: User buffer to write data from * @size: Number of bytes to write * @pos:  Offset to seek to

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