From: Tom St Denis Date: Mon, 5 Dec 2016 16:39:19 +0000 (-0500) Subject: drm/amd/amdgpu: Add debugfs support for reading GPRs (v2) X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c5a60ce81b4962d35a6bbb328fb234d33254cfb7;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git drm/amd/amdgpu: Add debugfs support for reading GPRs (v2) Implemented for SGPRs for GFX v8 initially. (v2) cleanup minor whitespace and remove sanity check and addressing is in dwords not bytes Signed-off-by: Tom St Denis Acked-by: Edward O'Callaghan Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index f31936b65a58..54ac8a845e9f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -842,6 +842,8 @@ struct amdgpu_gfx_funcs { uint64_t (*get_gpu_clock_counter)(struct amdgpu_device *adev); void (*select_se_sh)(struct amdgpu_device *adev, u32 se_num, u32 sh_num, u32 instance); void (*read_wave_data)(struct amdgpu_device *adev, uint32_t simd, uint32_t wave, uint32_t *dst, int *no_fields); + void (*read_wave_vgprs)(struct amdgpu_device *adev, uint32_t simd, uint32_t wave, uint32_t thread, uint32_t start, uint32_t size, uint32_t *dst); + void (*read_wave_sgprs)(struct amdgpu_device *adev, uint32_t simd, uint32_t wave, uint32_t start, uint32_t size, uint32_t *dst); }; struct amdgpu_gfx { diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index d9074117fb04..53ea782c2c47 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -2985,6 +2985,66 @@ static ssize_t amdgpu_debugfs_wave_read(struct file *f, char __user *buf, return result; } +static ssize_t amdgpu_debugfs_gpr_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_device *adev = f->f_inode->i_private; + int r; + ssize_t result = 0; + uint32_t offset, se, sh, cu, wave, simd, thread, bank, *data; + + if (size & 3 || *pos & 3) + return -EINVAL; + + /* decode offset */ + offset = (*pos & 0xFFF); /* in dwords */ + se = ((*pos >> 12) & 0xFF); + sh = ((*pos >> 20) & 0xFF); + cu = ((*pos >> 28) & 0xFF); + wave = ((*pos >> 36) & 0xFF); + simd = ((*pos >> 44) & 0xFF); + thread = ((*pos >> 52) & 0xFF); + bank = ((*pos >> 60) & 1); + + data = kmalloc_array(1024, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + /* switch to the specific se/sh/cu */ + mutex_lock(&adev->grbm_idx_mutex); + amdgpu_gfx_select_se_sh(adev, se, sh, cu); + + if (bank == 0) { + if (adev->gfx.funcs->read_wave_vgprs) + adev->gfx.funcs->read_wave_vgprs(adev, simd, wave, thread, offset, size>>2, data); + } else { + if (adev->gfx.funcs->read_wave_sgprs) + adev->gfx.funcs->read_wave_sgprs(adev, simd, wave, offset, size>>2, data); + } + + amdgpu_gfx_select_se_sh(adev, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF); + mutex_unlock(&adev->grbm_idx_mutex); + + while (size) { + uint32_t value; + + value = data[offset++]; + r = put_user(value, (uint32_t *)buf); + if (r) { + result = r; + goto err; + } + + result += 4; + buf += 4; + size -= 4; + } + +err: + kfree(data); + return result; +} + static const struct file_operations amdgpu_debugfs_regs_fops = { .owner = THIS_MODULE, .read = amdgpu_debugfs_regs_read, @@ -3027,6 +3087,11 @@ static const struct file_operations amdgpu_debugfs_wave_fops = { .read = amdgpu_debugfs_wave_read, .llseek = default_llseek }; +static const struct file_operations amdgpu_debugfs_gpr_fops = { + .owner = THIS_MODULE, + .read = amdgpu_debugfs_gpr_read, + .llseek = default_llseek +}; static const struct file_operations *debugfs_regs[] = { &amdgpu_debugfs_regs_fops, @@ -3036,6 +3101,7 @@ static const struct file_operations *debugfs_regs[] = { &amdgpu_debugfs_gca_config_fops, &amdgpu_debugfs_sensors_fops, &amdgpu_debugfs_wave_fops, + &amdgpu_debugfs_gpr_fops, }; static const char *debugfs_regs_names[] = { @@ -3046,6 +3112,7 @@ static const char *debugfs_regs_names[] = { "amdgpu_gca_config", "amdgpu_sensors", "amdgpu_wave", + "amdgpu_gpr", }; static int amdgpu_debugfs_regs_init(struct amdgpu_device *adev) diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c index e90e541581e2..6324f67bdb1f 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c @@ -5184,6 +5184,21 @@ static uint32_t wave_read_ind(struct amdgpu_device *adev, uint32_t simd, uint32_ return RREG32(mmSQ_IND_DATA); } +static void wave_read_regs(struct amdgpu_device *adev, uint32_t simd, + uint32_t wave, uint32_t thread, + uint32_t regno, uint32_t num, uint32_t *out) +{ + WREG32(mmSQ_IND_INDEX, + (wave << SQ_IND_INDEX__WAVE_ID__SHIFT) | + (simd << SQ_IND_INDEX__SIMD_ID__SHIFT) | + (regno << SQ_IND_INDEX__INDEX__SHIFT) | + (thread << SQ_IND_INDEX__THREAD_ID__SHIFT) | + (SQ_IND_INDEX__FORCE_READ_MASK) | + (SQ_IND_INDEX__AUTO_INCR_MASK)); + while (num--) + *(out++) = RREG32(mmSQ_IND_DATA); +} + static void gfx_v8_0_read_wave_data(struct amdgpu_device *adev, uint32_t simd, uint32_t wave, uint32_t *dst, int *no_fields) { /* type 0 wave data */ @@ -5208,11 +5223,21 @@ static void gfx_v8_0_read_wave_data(struct amdgpu_device *adev, uint32_t simd, u dst[(*no_fields)++] = wave_read_ind(adev, simd, wave, ixSQ_WAVE_M0); } +static void gfx_v8_0_read_wave_sgprs(struct amdgpu_device *adev, uint32_t simd, + uint32_t wave, uint32_t start, + uint32_t size, uint32_t *dst) +{ + wave_read_regs( + adev, simd, wave, 0, + start + SQIND_WAVE_SGPRS_OFFSET, size, dst); +} + static const struct amdgpu_gfx_funcs gfx_v8_0_gfx_funcs = { .get_gpu_clock_counter = &gfx_v8_0_get_gpu_clock_counter, .select_se_sh = &gfx_v8_0_select_se_sh, .read_wave_data = &gfx_v8_0_read_wave_data, + .read_wave_sgprs = &gfx_v8_0_read_wave_sgprs, }; static int gfx_v8_0_early_init(void *handle)