diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 321 |
1 files changed, 240 insertions, 81 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c index ee76b468774a..f5fb93795a69 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c @@ -28,8 +28,13 @@ #include <linux/debugfs.h> #include "amdgpu.h" -/* - * Debugfs +/** + * amdgpu_debugfs_add_files - Add simple debugfs entries + * + * @adev: Device to attach debugfs entries to + * @files: Array of function callbacks that respond to reads + * @nfiles: Number of callbacks to register + * */ int amdgpu_debugfs_add_files(struct amdgpu_device *adev, const struct drm_info_list *files, @@ -64,16 +69,47 @@ int amdgpu_debugfs_add_files(struct amdgpu_device *adev, #if defined(CONFIG_DEBUG_FS) -static ssize_t amdgpu_debugfs_regs_read(struct file *f, char __user *buf, - size_t size, loff_t *pos) +/** + * amdgpu_debugfs_process_reg_op - Handle MMIO register reads/writes + * + * @read: True if reading + * @f: open file handle + * @buf: User buffer to write/read to + * @size: Number of bytes to write/read + * @pos: Offset to seek to + * + * This debugfs entry has special meaning on the offset being sought. + * Various bits have different meanings: + * + * Bit 62: Indicates a GRBM bank switch is needed + * Bit 61: Indicates a SRBM bank switch is needed (implies bit 62 is + * zero) + * Bits 24..33: The SE or ME selector if needed + * Bits 34..43: The SH (or SA) or PIPE selector if needed + * Bits 44..53: The INSTANCE (or CU/WGP) or QUEUE selector if needed + * + * Bit 23: Indicates that the PM power gating lock should be held + * This is necessary to read registers that might be + * unreliable during a power gating transistion. + * + * The lower bits are the BYTE offset of the register to read. This + * allows reading multiple registers in a single call and having + * the returned size reflect that. + */ +static int amdgpu_debugfs_process_reg_op(bool read, struct file *f, + char __user *buf, size_t size, loff_t *pos) { struct amdgpu_device *adev = file_inode(f)->i_private; ssize_t result = 0; int r; - bool pm_pg_lock, use_bank; - unsigned instance_bank, sh_bank, se_bank; + bool pm_pg_lock, use_bank, use_ring; + unsigned instance_bank, sh_bank, se_bank, me, pipe, queue; - if (size & 0x3 || *pos & 0x3) + pm_pg_lock = use_bank = use_ring = false; + instance_bank = sh_bank = se_bank = me = pipe = queue = 0; + + if (size & 0x3 || *pos & 0x3 || + ((*pos & (1ULL << 62)) && (*pos & (1ULL << 61)))) return -EINVAL; /* are we reading registers for which a PG lock is necessary? */ @@ -91,8 +127,15 @@ static ssize_t amdgpu_debugfs_regs_read(struct file *f, char __user *buf, if (instance_bank == 0x3FF) instance_bank = 0xFFFFFFFF; use_bank = 1; + } else if (*pos & (1ULL << 61)) { + + me = (*pos & GENMASK_ULL(33, 24)) >> 24; + pipe = (*pos & GENMASK_ULL(43, 34)) >> 34; + queue = (*pos & GENMASK_ULL(53, 44)) >> 44; + + use_ring = 1; } else { - use_bank = 0; + use_bank = use_ring = 0; } *pos &= (1UL << 22) - 1; @@ -104,6 +147,9 @@ static ssize_t amdgpu_debugfs_regs_read(struct file *f, char __user *buf, mutex_lock(&adev->grbm_idx_mutex); amdgpu_gfx_select_se_sh(adev, se_bank, sh_bank, instance_bank); + } else if (use_ring) { + mutex_lock(&adev->srbm_mutex); + amdgpu_gfx_select_me_pipe_q(adev, me, pipe, queue); } if (pm_pg_lock) @@ -115,8 +161,14 @@ static ssize_t amdgpu_debugfs_regs_read(struct file *f, char __user *buf, if (*pos > adev->rmmio_size) goto end; - value = RREG32(*pos >> 2); - r = put_user(value, (uint32_t *)buf); + if (read) { + value = RREG32(*pos >> 2); + r = put_user(value, (uint32_t *)buf); + } else { + r = get_user(value, (uint32_t *)buf); + if (!r) + WREG32(*pos >> 2, value); + } if (r) { result = r; goto end; @@ -132,6 +184,9 @@ end: if (use_bank) { amdgpu_gfx_select_se_sh(adev, 0xffffffff, 0xffffffff, 0xffffffff); mutex_unlock(&adev->grbm_idx_mutex); + } else if (use_ring) { + amdgpu_gfx_select_me_pipe_q(adev, 0, 0, 0); + mutex_unlock(&adev->srbm_mutex); } if (pm_pg_lock) @@ -140,80 +195,37 @@ end: return result; } +/** + * amdgpu_debugfs_regs_read - Callback for reading MMIO registers + */ +static ssize_t amdgpu_debugfs_regs_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + return amdgpu_debugfs_process_reg_op(true, f, buf, size, pos); +} + +/** + * amdgpu_debugfs_regs_write - Callback for writing MMIO registers + */ static ssize_t amdgpu_debugfs_regs_write(struct file *f, const char __user *buf, size_t size, loff_t *pos) { - struct amdgpu_device *adev = file_inode(f)->i_private; - ssize_t result = 0; - int r; - bool pm_pg_lock, use_bank; - unsigned instance_bank, sh_bank, se_bank; - - if (size & 0x3 || *pos & 0x3) - return -EINVAL; - - /* are we reading registers for which a PG lock is necessary? */ - pm_pg_lock = (*pos >> 23) & 1; - - if (*pos & (1ULL << 62)) { - se_bank = (*pos & GENMASK_ULL(33, 24)) >> 24; - sh_bank = (*pos & GENMASK_ULL(43, 34)) >> 34; - instance_bank = (*pos & GENMASK_ULL(53, 44)) >> 44; - - 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; - } - - *pos &= (1UL << 22) - 1; - - if (use_bank) { - 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, - sh_bank, instance_bank); - } - - if (pm_pg_lock) - mutex_lock(&adev->pm.mutex); - - while (size) { - uint32_t value; - - if (*pos > adev->rmmio_size) - return result; - - r = get_user(value, (uint32_t *)buf); - if (r) - return r; - - WREG32(*pos >> 2, value); - - result += 4; - buf += 4; - *pos += 4; - size -= 4; - } - - if (use_bank) { - amdgpu_gfx_select_se_sh(adev, 0xffffffff, 0xffffffff, 0xffffffff); - mutex_unlock(&adev->grbm_idx_mutex); - } - - if (pm_pg_lock) - mutex_unlock(&adev->pm.mutex); - - return result; + return amdgpu_debugfs_process_reg_op(false, f, (char __user *)buf, size, pos); } + +/** + * amdgpu_debugfs_regs_pcie_read - Read from a PCIE register + * + * @f: open file handle + * @buf: User buffer to store read data in + * @size: Number of bytes to read + * @pos: Offset to seek to + * + * The lower bits are the BYTE offset of the register to read. This + * allows reading multiple registers in a single call and having + * the returned size reflect that. + */ static ssize_t amdgpu_debugfs_regs_pcie_read(struct file *f, char __user *buf, size_t size, loff_t *pos) { @@ -241,6 +253,18 @@ static ssize_t amdgpu_debugfs_regs_pcie_read(struct file *f, char __user *buf, return result; } +/** + * amdgpu_debugfs_regs_pcie_write - Write to a PCIE register + * + * @f: open file handle + * @buf: User buffer to write data from + * @size: Number of bytes to write + * @pos: Offset to seek to + * + * The lower bits are the BYTE offset of the register to write. This + * allows writing multiple registers in a single call and having + * the returned size reflect that. + */ static ssize_t amdgpu_debugfs_regs_pcie_write(struct file *f, const char __user *buf, size_t size, loff_t *pos) { @@ -269,6 +293,18 @@ static ssize_t amdgpu_debugfs_regs_pcie_write(struct file *f, const char __user return result; } +/** + * amdgpu_debugfs_regs_didt_read - Read from a DIDT register + * + * @f: open file handle + * @buf: User buffer to store read data in + * @size: Number of bytes to read + * @pos: Offset to seek to + * + * The lower bits are the BYTE offset of the register to read. This + * allows reading multiple registers in a single call and having + * the returned size reflect that. + */ static ssize_t amdgpu_debugfs_regs_didt_read(struct file *f, char __user *buf, size_t size, loff_t *pos) { @@ -296,6 +332,18 @@ static ssize_t amdgpu_debugfs_regs_didt_read(struct file *f, char __user *buf, return result; } +/** + * amdgpu_debugfs_regs_didt_write - Write to a DIDT register + * + * @f: open file handle + * @buf: User buffer to write data from + * @size: Number of bytes to write + * @pos: Offset to seek to + * + * The lower bits are the BYTE offset of the register to write. This + * allows writing multiple registers in a single call and having + * the returned size reflect that. + */ static ssize_t amdgpu_debugfs_regs_didt_write(struct file *f, const char __user *buf, size_t size, loff_t *pos) { @@ -324,6 +372,18 @@ static ssize_t amdgpu_debugfs_regs_didt_write(struct file *f, const char __user return result; } +/** + * amdgpu_debugfs_regs_smc_read - Read from a SMC register + * + * @f: open file handle + * @buf: User buffer to store read data in + * @size: Number of bytes to read + * @pos: Offset to seek to + * + * The lower bits are the BYTE offset of the register to read. This + * allows reading multiple registers in a single call and having + * the returned size reflect that. + */ static ssize_t amdgpu_debugfs_regs_smc_read(struct file *f, char __user *buf, size_t size, loff_t *pos) { @@ -351,6 +411,18 @@ static ssize_t amdgpu_debugfs_regs_smc_read(struct file *f, char __user *buf, return result; } +/** + * amdgpu_debugfs_regs_smc_write - Write to a SMC register + * + * @f: open file handle + * @buf: User buffer to write data from + * @size: Number of bytes to write + * @pos: Offset to seek to + * + * The lower bits are the BYTE offset of the register to write. This + * allows writing multiple registers in a single call and having + * the returned size reflect that. + */ static ssize_t amdgpu_debugfs_regs_smc_write(struct file *f, const char __user *buf, size_t size, loff_t *pos) { @@ -379,6 +451,20 @@ static ssize_t amdgpu_debugfs_regs_smc_write(struct file *f, const char __user * return result; } +/** + * amdgpu_debugfs_gca_config_read - Read from gfx config data + * + * @f: open file handle + * @buf: User buffer to store read data in + * @size: Number of bytes to read + * @pos: Offset to seek to + * + * This file is used to access configuration data in a somewhat + * stable fashion. The format is a series of DWORDs with the first + * indicating which revision it is. New content is appended to the + * end so that older software can still read the data. + */ + static ssize_t amdgpu_debugfs_gca_config_read(struct file *f, char __user *buf, size_t size, loff_t *pos) { @@ -455,6 +541,19 @@ static ssize_t amdgpu_debugfs_gca_config_read(struct file *f, char __user *buf, return result; } +/** + * amdgpu_debugfs_sensor_read - Read from the powerplay sensors + * + * @f: open file handle + * @buf: User buffer to store read data in + * @size: Number of bytes to read + * @pos: Offset to seek to + * + * The offset is treated as the BYTE address of one of the sensors + * enumerated in amd/include/kgd_pp_interface.h under the + * 'amd_pp_sensors' enumeration. For instance to read the UVD VCLK + * you would use the offset 3 * 4 = 12. + */ static ssize_t amdgpu_debugfs_sensor_read(struct file *f, char __user *buf, size_t size, loff_t *pos) { @@ -465,7 +564,7 @@ static ssize_t amdgpu_debugfs_sensor_read(struct file *f, char __user *buf, if (size & 3 || *pos & 0x3) return -EINVAL; - if (amdgpu_dpm == 0) + if (!adev->pm.dpm_enabled) return -EINVAL; /* convert offset to sensor number */ @@ -494,6 +593,27 @@ static ssize_t amdgpu_debugfs_sensor_read(struct file *f, char __user *buf, return !r ? outsize : r; } +/** amdgpu_debugfs_wave_read - Read WAVE STATUS data + * + * @f: open file handle + * @buf: User buffer to store read data in + * @size: Number of bytes to read + * @pos: Offset to seek to + * + * The offset being sought changes which wave that the status data + * will be returned for. The bits are used as follows: + * + * Bits 0..6: Byte offset into data + * Bits 7..14: SE selector + * Bits 15..22: SH/SA selector + * Bits 23..30: CU/{WGP+SIMD} selector + * Bits 31..36: WAVE ID selector + * Bits 37..44: SIMD ID selector + * + * The returned data begins with one DWORD of version information + * Followed by WAVE STATUS registers relevant to the GFX IP version + * being used. See gfx_v8_0_read_wave_data() for an example output. + */ static ssize_t amdgpu_debugfs_wave_read(struct file *f, char __user *buf, size_t size, loff_t *pos) { @@ -544,6 +664,28 @@ static ssize_t amdgpu_debugfs_wave_read(struct file *f, char __user *buf, return result; } +/** amdgpu_debugfs_gpr_read - Read wave gprs + * + * @f: open file handle + * @buf: User buffer to store read data in + * @size: Number of bytes to read + * @pos: Offset to seek to + * + * The offset being sought changes which wave that the status data + * will be returned for. The bits are used as follows: + * + * Bits 0..11: Byte offset into data + * Bits 12..19: SE selector + * Bits 20..27: SH/SA selector + * Bits 28..35: CU/{WGP+SIMD} selector + * Bits 36..43: WAVE ID selector + * Bits 37..44: SIMD ID selector + * Bits 52..59: Thread selector + * Bits 60..61: Bank selector (VGPR=0,SGPR=1) + * + * The return data comes from the SGPR or VGPR register bank for + * the selected operational unit. + */ static ssize_t amdgpu_debugfs_gpr_read(struct file *f, char __user *buf, size_t size, loff_t *pos) { @@ -674,6 +816,12 @@ static const char *debugfs_regs_names[] = { "amdgpu_gpr", }; +/** + * amdgpu_debugfs_regs_init - Initialize debugfs entries that provide + * register access. + * + * @adev: The device to attach the debugfs entries to + */ int amdgpu_debugfs_regs_init(struct amdgpu_device *adev) { struct drm_minor *minor = adev->ddev->primary; @@ -767,10 +915,21 @@ static int amdgpu_debugfs_evict_vram(struct seq_file *m, void *data) return 0; } +static int amdgpu_debugfs_evict_gtt(struct seq_file *m, void *data) +{ + struct drm_info_node *node = (struct drm_info_node *)m->private; + struct drm_device *dev = node->minor->dev; + struct amdgpu_device *adev = dev->dev_private; + + seq_printf(m, "(%d)\n", ttm_bo_evict_mm(&adev->mman.bdev, TTM_PL_TT)); + return 0; +} + static const struct drm_info_list amdgpu_debugfs_list[] = { {"amdgpu_vbios", amdgpu_debugfs_get_vbios_dump}, {"amdgpu_test_ib", &amdgpu_debugfs_test_ib}, - {"amdgpu_evict_vram", &amdgpu_debugfs_evict_vram} + {"amdgpu_evict_vram", &amdgpu_debugfs_evict_vram}, + {"amdgpu_evict_gtt", &amdgpu_debugfs_evict_gtt}, }; int amdgpu_debugfs_init(struct amdgpu_device *adev) |
