drm/amd/amdgpu: Allow broadcast on debugfs read (v2)

Allow any of the se/sh/instance fields to be
specified as a broadcast by submitting 0x3FF.

(v2) Fix broadcast range checking

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>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 188b8e0..822dfc2 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2576,6 +2576,13 @@ static ssize_t amdgpu_debugfs_regs_read(struct file *f, char __user *buf,
                se_bank = (*pos >> 24) & 0x3FF;
                sh_bank = (*pos >> 34) & 0x3FF;
                instance_bank = (*pos >> 44) & 0x3FF;
+
+               if (se_bank == 0x3FF)
+                       se_bank = 0xFFFFFFFF;
+               if (sh_bank == 0x3FF)
+                       sh_bank = 0xFFFFFFFF;
+               if (instance_bank == 0x3FF)
+                       instance_bank = 0xFFFFFFFF;
                use_bank = 1;
        } else {
                use_bank = 0;
@@ -2584,8 +2591,8 @@ static ssize_t amdgpu_debugfs_regs_read(struct file *f, char __user *buf,
        *pos &= 0x3FFFF;
 
        if (use_bank) {
-               if (sh_bank >= adev->gfx.config.max_sh_per_se ||
-                   se_bank >= adev->gfx.config.max_shader_engines)
+               if ((sh_bank != 0xFFFFFFFF && sh_bank >= adev->gfx.config.max_sh_per_se) ||
+                   (se_bank != 0xFFFFFFFF && se_bank >= adev->gfx.config.max_shader_engines))
                        return -EINVAL;
                mutex_lock(&adev->grbm_idx_mutex);
                amdgpu_gfx_select_se_sh(adev, se_bank,