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_objs(*telemetry->regs_hist_buff, 79 tl_data->num_hbuff); 80 if (!telemetry->regs_hist_buff) 81 goto err_free_rp_indexes; 82 83 telemetry->regs_data = dma_alloc_coherent(dev, regs_sz, 84 &telemetry->regs_data_p, 85 GFP_KERNEL); 86 if (!telemetry->regs_data) 87 goto err_free_regs_hist_buff; 88 89 for (i = 0; i < tl_data->num_hbuff; i++) { 90 tl_data_regs = kzalloc_node(regs_sz, GFP_KERNEL, node); 91 if (!tl_data_regs) 92 goto err_free_dma; 93 94 telemetry->regs_hist_buff[i] = tl_data_regs; 95 } 96 97 accel_dev->telemetry = telemetry; 98 99 return 0; 100 101 err_free_dma: 102 dma_free_coherent(dev, regs_sz, telemetry->regs_data, 103 telemetry->regs_data_p); 104 105 while (i--) 106 kfree(telemetry->regs_hist_buff[i]); 107 108 err_free_regs_hist_buff: 109 kfree(telemetry->regs_hist_buff); 110 err_free_rp_indexes: 111 kfree(telemetry->rp_num_indexes); 112 err_free_tl: 113 kfree(telemetry); 114 115 return -ENOMEM; 116 } 117 118 static void adf_tl_free_mem(struct adf_accel_dev *accel_dev) 119 { 120 struct adf_tl_hw_data *tl_data = &GET_TL_DATA(accel_dev); 121 struct adf_telemetry *telemetry = accel_dev->telemetry; 122 struct device *dev = &GET_DEV(accel_dev); 123 size_t regs_sz = tl_data->layout_sz; 124 unsigned int i; 125 126 for (i = 0; i < tl_data->num_hbuff; i++) 127 kfree(telemetry->regs_hist_buff[i]); 128 129 dma_free_coherent(dev, regs_sz, telemetry->regs_data, 130 telemetry->regs_data_p); 131 132 kfree(telemetry->regs_hist_buff); 133 kfree(telemetry->rp_num_indexes); 134 kfree(telemetry); 135 accel_dev->telemetry = NULL; 136 } 137 138 static unsigned long get_next_timeout(void) 139 { 140 return msecs_to_jiffies(ADF_TL_TIMER_INT_MS); 141 } 142 143 static void snapshot_regs(struct adf_telemetry *telemetry, size_t size) 144 { 145 void *dst = telemetry->regs_hist_buff[telemetry->hb_num]; 146 void *src = telemetry->regs_data; 147 148 memcpy(dst, src, size); 149 } 150 151 static void tl_work_handler(struct work_struct *work) 152 { 153 struct delayed_work *delayed_work; 154 struct adf_telemetry *telemetry; 155 struct adf_tl_hw_data *tl_data; 156 u32 msg_cnt, old_msg_cnt; 157 size_t layout_sz; 158 u32 *regs_data; 159 size_t id; 160 161 delayed_work = to_delayed_work(work); 162 telemetry = container_of(delayed_work, struct adf_telemetry, work_ctx); 163 tl_data = &GET_TL_DATA(telemetry->accel_dev); 164 regs_data = telemetry->regs_data; 165 166 id = tl_data->msg_cnt_off / sizeof(*regs_data); 167 layout_sz = tl_data->layout_sz; 168 169 if (!atomic_read(&telemetry->state)) { 170 cancel_delayed_work_sync(&telemetry->work_ctx); 171 return; 172 } 173 174 msg_cnt = regs_data[id]; 175 old_msg_cnt = msg_cnt; 176 if (msg_cnt == telemetry->msg_cnt) 177 goto out; 178 179 mutex_lock(&telemetry->regs_hist_lock); 180 181 snapshot_regs(telemetry, layout_sz); 182 183 /* Check if data changed while updating it */ 184 msg_cnt = regs_data[id]; 185 if (old_msg_cnt != msg_cnt) 186 snapshot_regs(telemetry, layout_sz); 187 188 telemetry->msg_cnt = msg_cnt; 189 telemetry->hb_num++; 190 telemetry->hb_num %= telemetry->hbuffs; 191 192 mutex_unlock(&telemetry->regs_hist_lock); 193 194 out: 195 adf_misc_wq_queue_delayed_work(&telemetry->work_ctx, get_next_timeout()); 196 } 197 198 int adf_tl_halt(struct adf_accel_dev *accel_dev) 199 { 200 struct adf_telemetry *telemetry = accel_dev->telemetry; 201 struct device *dev = &GET_DEV(accel_dev); 202 int ret; 203 204 cancel_delayed_work_sync(&telemetry->work_ctx); 205 atomic_set(&telemetry->state, 0); 206 207 ret = adf_send_admin_tl_stop(accel_dev); 208 if (ret) 209 dev_err(dev, "failed to stop telemetry\n"); 210 211 return ret; 212 } 213 214 static void adf_set_cmdq_cnt(struct adf_accel_dev *accel_dev, 215 struct adf_tl_hw_data *tl_data) 216 { 217 struct icp_qat_fw_init_admin_slice_cnt *slice_cnt, *cmdq_cnt; 218 219 slice_cnt = &accel_dev->telemetry->slice_cnt; 220 cmdq_cnt = &accel_dev->telemetry->cmdq_cnt; 221 222 cmdq_cnt->cpr_cnt = slice_cnt->cpr_cnt * tl_data->multiplier.cpr_cnt; 223 cmdq_cnt->dcpr_cnt = slice_cnt->dcpr_cnt * tl_data->multiplier.dcpr_cnt; 224 cmdq_cnt->pke_cnt = slice_cnt->pke_cnt * tl_data->multiplier.pke_cnt; 225 cmdq_cnt->wat_cnt = slice_cnt->wat_cnt * tl_data->multiplier.wat_cnt; 226 cmdq_cnt->wcp_cnt = slice_cnt->wcp_cnt * tl_data->multiplier.wcp_cnt; 227 cmdq_cnt->ucs_cnt = slice_cnt->ucs_cnt * tl_data->multiplier.ucs_cnt; 228 cmdq_cnt->ath_cnt = slice_cnt->ath_cnt * tl_data->multiplier.ath_cnt; 229 } 230 231 int adf_tl_run(struct adf_accel_dev *accel_dev, int state) 232 { 233 struct adf_tl_hw_data *tl_data = &GET_TL_DATA(accel_dev); 234 struct adf_telemetry *telemetry = accel_dev->telemetry; 235 struct device *dev = &GET_DEV(accel_dev); 236 size_t layout_sz = tl_data->layout_sz; 237 int ret; 238 239 ret = adf_send_admin_tl_start(accel_dev, telemetry->regs_data_p, 240 layout_sz, telemetry->rp_num_indexes, 241 &telemetry->slice_cnt); 242 if (ret) { 243 dev_err(dev, "failed to start telemetry\n"); 244 return ret; 245 } 246 247 ret = validate_tl_slice_counters(&telemetry->slice_cnt, tl_data->max_sl_cnt); 248 if (ret) { 249 dev_err(dev, "invalid value returned by FW\n"); 250 adf_send_admin_tl_stop(accel_dev); 251 return ret; 252 } 253 254 adf_set_cmdq_cnt(accel_dev, tl_data); 255 256 telemetry->hbuffs = state; 257 atomic_set(&telemetry->state, state); 258 259 adf_misc_wq_queue_delayed_work(&telemetry->work_ctx, get_next_timeout()); 260 261 return 0; 262 } 263 264 int adf_tl_init(struct adf_accel_dev *accel_dev) 265 { 266 struct adf_tl_hw_data *tl_data = &GET_TL_DATA(accel_dev); 267 u8 max_rp = GET_TL_DATA(accel_dev).max_rp; 268 struct device *dev = &GET_DEV(accel_dev); 269 struct adf_telemetry *telemetry; 270 unsigned int i; 271 int ret; 272 273 ret = validate_tl_data(tl_data); 274 if (ret) 275 return ret; 276 277 ret = adf_tl_alloc_mem(accel_dev); 278 if (ret) { 279 dev_err(dev, "failed to initialize: %d\n", ret); 280 return ret; 281 } 282 283 telemetry = accel_dev->telemetry; 284 telemetry->accel_dev = accel_dev; 285 286 mutex_init(&telemetry->wr_lock); 287 mutex_init(&telemetry->regs_hist_lock); 288 INIT_DELAYED_WORK(&telemetry->work_ctx, tl_work_handler); 289 290 for (i = 0; i < max_rp; i++) 291 telemetry->rp_num_indexes[i] = ADF_TL_RP_REGS_DISABLED; 292 293 return 0; 294 } 295 296 int adf_tl_start(struct adf_accel_dev *accel_dev) 297 { 298 struct device *dev = &GET_DEV(accel_dev); 299 300 if (!accel_dev->telemetry) 301 return -EOPNOTSUPP; 302 303 if (!is_tl_supported(accel_dev)) { 304 dev_info(dev, "feature not supported by FW\n"); 305 adf_tl_free_mem(accel_dev); 306 return -EOPNOTSUPP; 307 } 308 309 return 0; 310 } 311 312 void adf_tl_stop(struct adf_accel_dev *accel_dev) 313 { 314 if (!accel_dev->telemetry) 315 return; 316 317 if (atomic_read(&accel_dev->telemetry->state)) 318 adf_tl_halt(accel_dev); 319 } 320 321 void adf_tl_shutdown(struct adf_accel_dev *accel_dev) 322 { 323 if (!accel_dev->telemetry) 324 return; 325 326 adf_tl_free_mem(accel_dev); 327 } 328