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Commit 56628159 authored by Tom St Denis's avatar Tom St Denis Committed by Alex Deucher
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drm/amd/amdgpu: Add bank selection for MMIO debugfs (v3) 



(v2) Added INSTANCE selector
(v3) Changed order of bank selectors

Signed-off-by: default avatarTom St Denis <tom.stdenis@amd.com>
Reviewed-by: default avatarNicolai Hähnle <nicolai.haehnle@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 1e051413

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

+32 −3
Original line number Diff line number Diff line
@@ -2181,20 +2181,43 @@ static ssize_t amdgpu_debugfs_regs_read(struct file *f, char __user *buf, 
	struct amdgpu_device *adev = f->f_inode->i_private;

	ssize_t result = 0;

	int r;

	bool use_bank;

	unsigned instance_bank, sh_bank, se_bank;



	if (size & 0x3 || *pos & 0x3)

		return -EINVAL;



	if (*pos & (1ULL << 62)) {

		se_bank = (*pos >> 24) & 0x3FF;

		sh_bank = (*pos >> 34) & 0x3FF;

		instance_bank = (*pos >> 44) & 0x3FF;

		use_bank = 1;

		*pos &= 0xFFFFFF;

	} else {

		use_bank = 0;

	}



	if (use_bank) {

		if (sh_bank >= adev->gfx.config.max_sh_per_se ||

		    se_bank >= adev->gfx.config.max_shader_engines)

			return -EINVAL;

		mutex_lock(&adev->grbm_idx_mutex);

		amdgpu_gfx_select_se_sh(adev, se_bank,

					sh_bank, instance_bank);

	}



	while (size) {

		uint32_t value;



		if (*pos > adev->rmmio_size)

			return result;

			goto end;



		value = RREG32(*pos >> 2);

		r = put_user(value, (uint32_t *)buf);

		if (r)

			return r;

		if (r) {

			result = r;

			goto end;

		}



		result += 4;

		buf += 4;
@@ -2202,6 +2225,12 @@ static ssize_t amdgpu_debugfs_regs_read(struct file *f, char __user *buf, 
		size -= 4;

	}



end:

	if (use_bank) {

		amdgpu_gfx_select_se_sh(adev, 0xffffffff, 0xffffffff, 0xffffffff);

		mutex_unlock(&adev->grbm_idx_mutex);

	}



	return result;

}