diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_umsch_mm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_umsch_mm.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_umsch_mm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_umsch_mm.c index e01c1c8e64c4..fbc2852278e1 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_umsch_mm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_umsch_mm.c @@ -23,7 +23,10 @@ */ #include <linux/firmware.h> +#include <linux/module.h> +#include <linux/debugfs.h> #include <drm/drm_exec.h> +#include <drm/drm_drv.h> #include "amdgpu.h" #include "amdgpu_umsch_mm.h" @@ -743,6 +746,17 @@ static int umsch_mm_init(struct amdgpu_device *adev) return r; } + r = amdgpu_bo_create_kernel(adev, AMDGPU_UMSCHFW_LOG_SIZE, PAGE_SIZE, + AMDGPU_GEM_DOMAIN_VRAM | + AMDGPU_GEM_DOMAIN_GTT, + &adev->umsch_mm.dbglog_bo, + &adev->umsch_mm.log_gpu_addr, + &adev->umsch_mm.log_cpu_addr); + if (r) { + dev_err(adev->dev, "(%d) failed to allocate umsch debug bo\n", r); + return r; + } + mutex_init(&adev->umsch_mm.mutex_hidden); umsch_mm_agdb_index_init(adev); @@ -789,6 +803,7 @@ static int umsch_mm_sw_init(void *handle) if (r) return r; + amdgpu_umsch_fwlog_init(&adev->umsch_mm); r = umsch_mm_ring_init(&adev->umsch_mm); if (r) return r; @@ -815,6 +830,10 @@ static int umsch_mm_sw_fini(void *handle) &adev->umsch_mm.cmd_buf_gpu_addr, (void **)&adev->umsch_mm.cmd_buf_ptr); + amdgpu_bo_free_kernel(&adev->umsch_mm.dbglog_bo, + &adev->umsch_mm.log_gpu_addr, + (void **)&adev->umsch_mm.log_cpu_addr); + amdgpu_device_wb_free(adev, adev->umsch_mm.wb_index); return 0; @@ -868,6 +887,106 @@ static int umsch_mm_resume(void *handle) return umsch_mm_hw_init(adev); } +void amdgpu_umsch_fwlog_init(struct amdgpu_umsch_mm *umsch_mm) +{ +#if defined(CONFIG_DEBUG_FS) + void *fw_log_cpu_addr = umsch_mm->log_cpu_addr; + volatile struct amdgpu_umsch_fwlog *log_buf = fw_log_cpu_addr; + + log_buf->header_size = sizeof(struct amdgpu_umsch_fwlog); + log_buf->buffer_size = AMDGPU_UMSCHFW_LOG_SIZE; + log_buf->rptr = log_buf->header_size; + log_buf->wptr = log_buf->header_size; + log_buf->wrapped = 0; +#endif +} + +/* + * debugfs for mapping umsch firmware log buffer. + */ +#if defined(CONFIG_DEBUG_FS) +static ssize_t amdgpu_debugfs_umsch_fwlog_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_umsch_mm *umsch_mm; + void *log_buf; + volatile struct amdgpu_umsch_fwlog *plog; + unsigned int read_pos, write_pos, available, i, read_bytes = 0; + unsigned int read_num[2] = {0}; + + umsch_mm = file_inode(f)->i_private; + if (!umsch_mm) + return -ENODEV; + + if (!umsch_mm->log_cpu_addr) + return -EFAULT; + + log_buf = umsch_mm->log_cpu_addr; + + plog = (volatile struct amdgpu_umsch_fwlog *)log_buf; + read_pos = plog->rptr; + write_pos = plog->wptr; + + if (read_pos > AMDGPU_UMSCHFW_LOG_SIZE || write_pos > AMDGPU_UMSCHFW_LOG_SIZE) + return -EFAULT; + + if (!size || (read_pos == write_pos)) + return 0; + + if (write_pos > read_pos) { + available = write_pos - read_pos; + read_num[0] = min_t(size_t, size, available); + } else { + read_num[0] = AMDGPU_UMSCHFW_LOG_SIZE - read_pos; + available = read_num[0] + write_pos - plog->header_size; + if (size > available) + read_num[1] = write_pos - plog->header_size; + else if (size > read_num[0]) + read_num[1] = size - read_num[0]; + else + read_num[0] = size; + } + + for (i = 0; i < 2; i++) { + if (read_num[i]) { + if (read_pos == AMDGPU_UMSCHFW_LOG_SIZE) + read_pos = plog->header_size; + if (read_num[i] == copy_to_user((buf + read_bytes), + (log_buf + read_pos), read_num[i])) + return -EFAULT; + + read_bytes += read_num[i]; + read_pos += read_num[i]; + } + } + + plog->rptr = read_pos; + *pos += read_bytes; + return read_bytes; +} + +static const struct file_operations amdgpu_debugfs_umschfwlog_fops = { + .owner = THIS_MODULE, + .read = amdgpu_debugfs_umsch_fwlog_read, + .llseek = default_llseek +}; +#endif + +void amdgpu_debugfs_umsch_fwlog_init(struct amdgpu_device *adev, + struct amdgpu_umsch_mm *umsch_mm) +{ +#if defined(CONFIG_DEBUG_FS) + struct drm_minor *minor = adev_to_drm(adev)->primary; + struct dentry *root = minor->debugfs_root; + char name[32]; + + sprintf(name, "amdgpu_umsch_fwlog"); + debugfs_create_file_size(name, S_IFREG | 0444, root, umsch_mm, + &amdgpu_debugfs_umschfwlog_fops, + AMDGPU_UMSCHFW_LOG_SIZE); +#endif +} + static const struct amd_ip_funcs umsch_mm_v4_0_ip_funcs = { .name = "umsch_mm_v4_0", .early_init = umsch_mm_early_init, |