From: Tom St Denis tom.stdenis@amd.com
This adds 3 new files that can be read/written to access indirect GPU registers.
Signed-off-by: Tom St Denis tom.stdenis@amd.com Reviewed-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 230 ++++++++++++++++++++++++++++- 2 files changed, 223 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index 6cc174f..1012bd3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -1953,7 +1953,7 @@ struct amdgpu_device { struct amdgpu_debugfs debugfs[AMDGPU_DEBUGFS_MAX_COMPONENTS]; unsigned debugfs_count; #if defined(CONFIG_DEBUG_FS) - struct dentry *debugfs_regs; + struct dentry *debugfs_regs[AMDGPU_DEBUGFS_MAX_COMPONENTS]; #endif struct amdgpu_atif atif; struct amdgpu_atcs atcs; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 14e832f..8f037e5 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -2134,32 +2134,246 @@ static ssize_t amdgpu_debugfs_regs_write(struct file *f, const char __user *buf, return result; }
+static ssize_t amdgpu_debugfs_regs_pcie_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_device *adev = f->f_inode->i_private; + ssize_t result = 0; + int r; + + if (size & 0x3 || *pos & 0x3) + return -EINVAL; + + while (size) { + uint32_t value; + + value = RREG32_PCIE(*pos >> 2); + r = put_user(value, (uint32_t *)buf); + if (r) + return r; + + result += 4; + buf += 4; + *pos += 4; + size -= 4; + } + + return result; +} + +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 = f->f_inode->i_private; + ssize_t result = 0; + int r; + + if (size & 0x3 || *pos & 0x3) + return -EINVAL; + + while (size) { + uint32_t value; + + r = get_user(value, (uint32_t *)buf); + if (r) + return r; + + WREG32_PCIE(*pos >> 2, value); + + result += 4; + buf += 4; + *pos += 4; + size -= 4; + } + + return result; +} + +static ssize_t amdgpu_debugfs_regs_didt_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_device *adev = f->f_inode->i_private; + ssize_t result = 0; + int r; + + if (size & 0x3 || *pos & 0x3) + return -EINVAL; + + while (size) { + uint32_t value; + + value = RREG32_DIDT(*pos >> 2); + r = put_user(value, (uint32_t *)buf); + if (r) + return r; + + result += 4; + buf += 4; + *pos += 4; + size -= 4; + } + + return result; +} + +static ssize_t amdgpu_debugfs_regs_didt_write(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_device *adev = f->f_inode->i_private; + ssize_t result = 0; + int r; + + if (size & 0x3 || *pos & 0x3) + return -EINVAL; + + while (size) { + uint32_t value; + + r = get_user(value, (uint32_t *)buf); + if (r) + return r; + + WREG32_DIDT(*pos >> 2, value); + + result += 4; + buf += 4; + *pos += 4; + size -= 4; + } + + return result; +} + +static ssize_t amdgpu_debugfs_regs_smc_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_device *adev = f->f_inode->i_private; + ssize_t result = 0; + int r; + + if (size & 0x3 || *pos & 0x3) + return -EINVAL; + + while (size) { + uint32_t value; + + value = RREG32_SMC(*pos >> 2); + r = put_user(value, (uint32_t *)buf); + if (r) + return r; + + result += 4; + buf += 4; + *pos += 4; + size -= 4; + } + + return result; +} + +static ssize_t amdgpu_debugfs_regs_smc_write(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_device *adev = f->f_inode->i_private; + ssize_t result = 0; + int r; + + if (size & 0x3 || *pos & 0x3) + return -EINVAL; + + while (size) { + uint32_t value; + + r = get_user(value, (uint32_t *)buf); + if (r) + return r; + + WREG32_SMC(*pos >> 2, value); + + result += 4; + buf += 4; + *pos += 4; + size -= 4; + } + + return result; +} + static const struct file_operations amdgpu_debugfs_regs_fops = { .owner = THIS_MODULE, .read = amdgpu_debugfs_regs_read, .write = amdgpu_debugfs_regs_write, .llseek = default_llseek }; +static const struct file_operations amdgpu_debugfs_regs_didt_fops = { + .owner = THIS_MODULE, + .read = amdgpu_debugfs_regs_didt_read, + .write = amdgpu_debugfs_regs_didt_write, + .llseek = default_llseek +}; +static const struct file_operations amdgpu_debugfs_regs_pcie_fops = { + .owner = THIS_MODULE, + .read = amdgpu_debugfs_regs_pcie_read, + .write = amdgpu_debugfs_regs_pcie_write, + .llseek = default_llseek +}; +static const struct file_operations amdgpu_debugfs_regs_smc_fops = { + .owner = THIS_MODULE, + .read = amdgpu_debugfs_regs_smc_read, + .write = amdgpu_debugfs_regs_smc_write, + .llseek = default_llseek +}; + +static const struct file_operations *debugfs_regs[] = { + &amdgpu_debugfs_regs_fops, + &amdgpu_debugfs_regs_didt_fops, + &amdgpu_debugfs_regs_pcie_fops, + &amdgpu_debugfs_regs_smc_fops, +}; + +static const char *debugfs_regs_names[] = { + "amdgpu_regs", + "amdgpu_regs_didt", + "amdgpu_regs_pcie", + "amdgpu_regs_smc", +};
static int amdgpu_debugfs_regs_init(struct amdgpu_device *adev) { struct drm_minor *minor = adev->ddev->primary; struct dentry *ent, *root = minor->debugfs_root; + unsigned i, j; + + for (i = 0; i < ARRAY_SIZE(debugfs_regs); i++) { + ent = debugfs_create_file(debugfs_regs_names[i], + S_IFREG | S_IRUGO, root, + adev, debugfs_regs[i]); + if (IS_ERR(ent)) { + for (j = 0; j < i; j++) { + debugfs_remove(adev->debugfs_regs[i]); + adev->debugfs_regs[i] = NULL; + } + return PTR_ERR(ent); + }
- ent = debugfs_create_file("amdgpu_regs", S_IFREG | S_IRUGO, root, - adev, &amdgpu_debugfs_regs_fops); - if (IS_ERR(ent)) - return PTR_ERR(ent); - i_size_write(ent->d_inode, adev->rmmio_size); - adev->debugfs_regs = ent; + if (!i) + i_size_write(ent->d_inode, adev->rmmio_size); + adev->debugfs_regs[i] = ent; + }
return 0; }
static void amdgpu_debugfs_regs_cleanup(struct amdgpu_device *adev) { - debugfs_remove(adev->debugfs_regs); - adev->debugfs_regs = NULL; + unsigned i; + + for (i = 0; i < ARRAY_SIZE(debugfs_regs); i++) { + if (adev->debugfs_regs[i]) { + debugfs_remove(adev->debugfs_regs[i]); + adev->debugfs_regs[i] = NULL; + } + } }
int amdgpu_debugfs_init(struct drm_minor *minor)