drm/amd/amdgpu: Add gca config debug entry (v4)

A binary entry that lists GCA configuration data (and can be
read by umr).

(v2) Use kmalloc instead of vmalloc
(v3) Minor indentation correction
(v4) agd: Squash in kmalloc fix

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@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 660d04a9a9acee4c3c02f8cebe5f042ec99b4525..ce9a1dc7fc06279905a12fa81bdf7bede2db1517 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2401,6 +2401,68 @@ static ssize_t amdgpu_debugfs_regs_smc_write(struct file *f, const char __user *
        return result;
 }
 
+static ssize_t amdgpu_debugfs_gca_config_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;
+       uint32_t *config, no_regs = 0;
+
+       if (size & 0x3 || *pos & 0x3)
+               return -EINVAL;
+
+       config = kmalloc(256 * sizeof(*config), GFP_KERNEL);
+       if (!config)
+               return -ENOMEM;
+
+       /* version, increment each time something is added */
+       config[no_regs++] = 0;
+       config[no_regs++] = adev->gfx.config.max_shader_engines;
+       config[no_regs++] = adev->gfx.config.max_tile_pipes;
+       config[no_regs++] = adev->gfx.config.max_cu_per_sh;
+       config[no_regs++] = adev->gfx.config.max_sh_per_se;
+       config[no_regs++] = adev->gfx.config.max_backends_per_se;
+       config[no_regs++] = adev->gfx.config.max_texture_channel_caches;
+       config[no_regs++] = adev->gfx.config.max_gprs;
+       config[no_regs++] = adev->gfx.config.max_gs_threads;
+       config[no_regs++] = adev->gfx.config.max_hw_contexts;
+       config[no_regs++] = adev->gfx.config.sc_prim_fifo_size_frontend;
+       config[no_regs++] = adev->gfx.config.sc_prim_fifo_size_backend;
+       config[no_regs++] = adev->gfx.config.sc_hiz_tile_fifo_size;
+       config[no_regs++] = adev->gfx.config.sc_earlyz_tile_fifo_size;
+       config[no_regs++] = adev->gfx.config.num_tile_pipes;
+       config[no_regs++] = adev->gfx.config.backend_enable_mask;
+       config[no_regs++] = adev->gfx.config.mem_max_burst_length_bytes;
+       config[no_regs++] = adev->gfx.config.mem_row_size_in_kb;
+       config[no_regs++] = adev->gfx.config.shader_engine_tile_size;
+       config[no_regs++] = adev->gfx.config.num_gpus;
+       config[no_regs++] = adev->gfx.config.multi_gpu_tile_size;
+       config[no_regs++] = adev->gfx.config.mc_arb_ramcfg;
+       config[no_regs++] = adev->gfx.config.gb_addr_config;
+       config[no_regs++] = adev->gfx.config.num_rbs;
+
+       while (size && (*pos < no_regs * 4)) {
+               uint32_t value;
+
+               value = config[*pos >> 2];
+               r = put_user(value, (uint32_t *)buf);
+               if (r) {
+                       kfree(config);
+                       return r;
+               }
+
+               result += 4;
+               buf += 4;
+               *pos += 4;
+               size -= 4;
+       }
+
+       kfree(config);
+       return result;
+}
+
+
 static const struct file_operations amdgpu_debugfs_regs_fops = {
        .owner = THIS_MODULE,
        .read = amdgpu_debugfs_regs_read,
@@ -2426,11 +2488,18 @@ static const struct file_operations amdgpu_debugfs_regs_smc_fops = {
        .llseek = default_llseek
 };
 
+static const struct file_operations amdgpu_debugfs_gca_config_fops = {
+       .owner = THIS_MODULE,
+       .read = amdgpu_debugfs_gca_config_read,
+       .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,
+       &amdgpu_debugfs_gca_config_fops,
 };
 
 static const char *debugfs_regs_names[] = {
@@ -2438,6 +2507,7 @@ static const char *debugfs_regs_names[] = {
        "amdgpu_regs_didt",
        "amdgpu_regs_pcie",
        "amdgpu_regs_smc",
+       "amdgpu_gca_config",
 };
 
 static int amdgpu_debugfs_regs_init(struct amdgpu_device *adev)