1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Copyright (c) 2023 Intel Corporation. */ 3 #define dev_fmt(fmt) "Telemetry: " fmt 4 5 #include <asm/errno.h> 6 #include <linux/atomic.h> 7 #include <linux/device.h> 8 #include <linux/dev_printk.h> 9 #include <linux/dma-mapping.h> 10 #include <linux/jiffies.h> 11 #include <linux/kernel.h> 12 #include <linux/mutex.h> 13 #include <linux/slab.h> 14 #include <linux/string.h> 15 #include <linux/workqueue.h> 16 17 #include "adf_admin.h" 18 #include "adf_accel_devices.h" 19 #include "adf_common_drv.h" 20 #include "adf_telemetry.h" 21 22 #define TL_IS_ZERO(input) ((input) == 0) 23 24 static bool is_tl_supported(struct adf_accel_dev *accel_dev) 25 { 26 u16 fw_caps = GET_HW_DATA(accel_dev)->fw_capabilities; 27 28 return fw_caps & TL_CAPABILITY_BIT; 29 } 30 31 static int validate_tl_data(struct adf_tl_hw_data *tl_data) 32 { 33 if (!tl_data->dev_counters || 34 TL_IS_ZERO(tl_data->num_dev_counters) || 35 !tl_data->sl_util_counters || 36 !tl_data->sl_exec_counters || 37 !tl_data->rp_counters || 38 TL_IS_ZERO(tl_data->num_rp_counters)) 39 return -EOPNOTSUPP; 40 41 return 0; 42 } 43 44 static int validate_tl_slice_counters(struct icp_qat_fw_init_admin_slice_cnt *slice_count, 45 u8 max_slices_per_type) 46 { 47 u8 *sl_counter = (u8 *)slice_count; 48 int i; 49 50 for (i = 0; i < ADF_TL_SL_CNT_COUNT; i++) { 51 if (sl_counter[i] > max_slices_per_type) 52 return -EINVAL; 53 } 54 55 return 0; 56 } 57 58 static int adf_tl_alloc_mem(struct adf_accel_dev *accel_dev) 59 { 60 struct adf_tl_hw_data *tl_data = &GET_TL_DATA(accel_dev); 61 struct device *dev = &GET_DEV(accel_dev); 62 size_t regs_sz = tl_data->layout_sz; 63 struct adf_telemetry *telemetry; 64 int node = dev_to_node(dev); 65 void *tl_data_regs; 66 unsigned int i; 67 68 telemetry = kzalloc_node(sizeof(*telemetry), GFP_KERNEL, node); 69 if (!telemetry) 70 return -ENOMEM; 71 72 telemetry->rp_num_indexes = kmalloc_array(tl_data->max_rp, 73 sizeof(*telemetry->rp_num_indexes), 74 GFP_KERNEL); 75 if (!telemetry->rp_num_indexes) 76 goto err_free_tl; 77 78 telemetry->regs_hist_buff = kmalloc_array(tl_data->num_hbuff, 79 sizeof(*telemetry->regs_hist_buff), 80 GFP_KERNEL); 81 if (!telemetry->regs_hist_buff) 82 goto err_free_rp_indexes; 83 84 telemetry->regs_data = dma_alloc_coherent(dev, regs_sz, 85 &telemetry->regs_data_p, 86 GFP_KERNEL); 87 if (!telemetry->regs_data) 88 goto err_free_regs_hist_buff; 89 90 for (i = 0; i < tl_data->num_hbuff; i++) { 91 tl_data_regs = kzalloc_node(regs_sz, GFP_KERNEL, node); 92 if (!tl_data_regs) 93 goto err_free_dma; 94 95 telemetry->regs_hist_buff[i] = tl_data_regs; 96 } 97 98 accel_dev->telemetry = telemetry; 99 100 return 0; 101 102 err_free_dma: 103 dma_free_coherent(dev, regs_sz, telemetry->regs_data, 104 telemetry->regs_data_p); 105 106 while (i--) 107 kfree(telemetry->regs_hist_buff[i]); 108 109 err_free_regs_hist_buff: 110 kfree(telemetry->regs_hist_buff); 111 err_free_rp_indexes: 112 kfree(telemetry->rp_num_indexes); 113 err_free_tl: 114 kfree(telemetry); 115 116 return -ENOMEM; 117 } 118 119 static void adf_tl_free_mem(struct adf_accel_dev *accel_dev) 120 { 121 struct adf_tl_hw_data *tl_data = &GET_TL_DATA(accel_dev); 122 struct adf_telemetry *telemetry = accel_dev->telemetry; 123 struct device *dev = &GET_DEV(accel_dev); 124 size_t regs_sz = tl_data->layout_sz; 125 unsigned int i; 126 127 for (i = 0; i < tl_data->num_hbuff; i++) 128 kfree(telemetry->regs_hist_buff[i]); 129 130 dma_free_coherent(dev, regs_sz, telemetry->regs_data, 131 telemetry->regs_data_p); 132 133 kfree(telemetry->regs_hist_buff); 134 kfree(telemetry->rp_num_indexes); 135 kfree(telemetry); 136 accel_dev->telemetry = NULL; 137 } 138 139 static unsigned long get_next_timeout(void) 140 { 141 return msecs_to_jiffies(ADF_TL_TIMER_INT_MS); 142 } 143 144 static void snapshot_regs(struct adf_telemetry *telemetry, size_t size) 145 { 146 void *dst = telemetry->regs_hist_buff[telemetry->hb_num]; 147 void *src = telemetry->regs_data; 148 149 memcpy(dst, src, size); 150 } 151 152 static void tl_work_handler(struct work_struct *work) 153 { 154 struct delayed_work *delayed_work; 155 struct adf_telemetry *telemetry; 156 struct adf_tl_hw_data *tl_data; 157 u32 msg_cnt, old_msg_cnt; 158 size_t layout_sz; 159 u32 *regs_data; 160 size_t id; 161 162 delayed_work = to_delayed_work(work); 163 telemetry = container_of(delayed_work, struct adf_telemetry, work_ctx); 164 tl_data = &GET_TL_DATA(telemetry->accel_dev); 165 regs_data = telemetry->regs_data; 166 167 id = tl_data->msg_cnt_off / sizeof(*regs_data); 168 layout_sz = tl_data->layout_sz; 169 170 if (!atomic_read(&telemetry->state)) { 171 cancel_delayed_work_sync(&telemetry->work_ctx); 172 return; 173 } 174 175 msg_cnt = regs_data[id]; 176 old_msg_cnt = msg_cnt; 177 if (msg_cnt == telemetry->msg_cnt) 178 goto out; 179 180 mutex_lock(&telemetry->regs_hist_lock); 181 182 snapshot_regs(telemetry, layout_sz); 183 184 /* Check if data changed while updating it */ 185 msg_cnt = regs_data[id]; 186 if (old_msg_cnt != msg_cnt) 187 snapshot_regs(telemetry, layout_sz); 188 189 telemetry->msg_cnt = msg_cnt; 190 telemetry->hb_num++; 191 telemetry->hb_num %= telemetry->hbuffs; 192 193 mutex_unlock(&telemetry->regs_hist_lock); 194 195 out: 196 adf_misc_wq_queue_delayed_work(&telemetry->work_ctx, get_next_timeout()); 197 } 198 199 int adf_tl_halt(struct adf_accel_dev *accel_dev) 200 { 201 struct adf_telemetry *telemetry = accel_dev->telemetry; 202 struct device *dev = &GET_DEV(accel_dev); 203 int ret; 204 205 cancel_delayed_work_sync(&telemetry->work_ctx); 206 atomic_set(&telemetry->state, 0); 207 208 ret = adf_send_admin_tl_stop(accel_dev); 209 if (ret) 210 dev_err(dev, "failed to stop telemetry\n"); 211 212 return ret; 213 } 214 215 int adf_tl_run(struct adf_accel_dev *accel_dev, int state) 216 { 217 struct adf_tl_hw_data *tl_data = &GET_TL_DATA(accel_dev); 218 struct adf_telemetry *telemetry = accel_dev->telemetry; 219 struct device *dev = &GET_DEV(accel_dev); 220 size_t layout_sz = tl_data->layout_sz; 221 int ret; 222 223 ret = adf_send_admin_tl_start(accel_dev, telemetry->regs_data_p, 224 layout_sz, telemetry->rp_num_indexes, 225 &telemetry->slice_cnt); 226 if (ret) { 227 dev_err(dev, "failed to start telemetry\n"); 228 return ret; 229 } 230 231 ret = validate_tl_slice_counters(&telemetry->slice_cnt, tl_data->max_sl_cnt); 232 if (ret) { 233 dev_err(dev, "invalid value returned by FW\n"); 234 adf_send_admin_tl_stop(accel_dev); 235 return ret; 236 } 237 238 telemetry->hbuffs = state; 239 atomic_set(&telemetry->state, state); 240 241 adf_misc_wq_queue_delayed_work(&telemetry->work_ctx, get_next_timeout()); 242 243 return 0; 244 } 245 246 int adf_tl_init(struct adf_accel_dev *accel_dev) 247 { 248 struct adf_tl_hw_data *tl_data = &GET_TL_DATA(accel_dev); 249 u8 max_rp = GET_TL_DATA(accel_dev).max_rp; 250 struct device *dev = &GET_DEV(accel_dev); 251 struct adf_telemetry *telemetry; 252 unsigned int i; 253 int ret; 254 255 ret = validate_tl_data(tl_data); 256 if (ret) 257 return ret; 258 259 ret = adf_tl_alloc_mem(accel_dev); 260 if (ret) { 261 dev_err(dev, "failed to initialize: %d\n", ret); 262 return ret; 263 } 264 265 telemetry = accel_dev->telemetry; 266 telemetry->accel_dev = accel_dev; 267 268 mutex_init(&telemetry->wr_lock); 269 mutex_init(&telemetry->regs_hist_lock); 270 INIT_DELAYED_WORK(&telemetry->work_ctx, tl_work_handler); 271 272 for (i = 0; i < max_rp; i++) 273 telemetry->rp_num_indexes[i] = ADF_TL_RP_REGS_DISABLED; 274 275 return 0; 276 } 277 278 int adf_tl_start(struct adf_accel_dev *accel_dev) 279 { 280 struct device *dev = &GET_DEV(accel_dev); 281 282 if (!accel_dev->telemetry) 283 return -EOPNOTSUPP; 284 285 if (!is_tl_supported(accel_dev)) { 286 dev_info(dev, "feature not supported by FW\n"); 287 adf_tl_free_mem(accel_dev); 288 return -EOPNOTSUPP; 289 } 290 291 return 0; 292 } 293 294 void adf_tl_stop(struct adf_accel_dev *accel_dev) 295 { 296 if (!accel_dev->telemetry) 297 return; 298 299 if (atomic_read(&accel_dev->telemetry->state)) 300 adf_tl_halt(accel_dev); 301 } 302 303 void adf_tl_shutdown(struct adf_accel_dev *accel_dev) 304 { 305 if (!accel_dev->telemetry) 306 return; 307 308 adf_tl_free_mem(accel_dev); 309 } 310