1// SPDX-License-Identifier: GPL-2.0-only
  2//
  3// Copyright(c) 2021-2022 Intel Corporation
  4//
  5// Authors: Cezary Rojewski <cezary.rojewski@intel.com>
  6//          Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
  7//
  8
  9#include <linux/devcoredump.h>
 10#include <linux/slab.h>
 11#include <sound/hdaudio_ext.h>
 12#include "avs.h"
 13#include "messages.h"
 14#include "path.h"
 15#include "registers.h"
 16#include "topology.h"
 17
 18static irqreturn_t avs_apl_dsp_interrupt(struct avs_dev *adev)
 19{
 20	u32 adspis = snd_hdac_adsp_readl(adev, AVS_ADSP_REG_ADSPIS);
 21	irqreturn_t ret = IRQ_NONE;
 22
 23	if (adspis == UINT_MAX)
 24		return ret;
 25
 26	if (adspis & AVS_ADSP_ADSPIS_IPC) {
 27		avs_skl_ipc_interrupt(adev);
 28		ret = IRQ_HANDLED;
 29	}
 30
 31	return ret;
 32}
 33
 34#ifdef CONFIG_DEBUG_FS
 35int avs_apl_enable_logs(struct avs_dev *adev, enum avs_log_enable enable, u32 aging_period,
 36			u32 fifo_full_period, unsigned long resource_mask, u32 *priorities)
 37{
 38	struct avs_apl_log_state_info *info;
 39	u32 size, num_cores = adev->hw_cfg.dsp_cores;
 40	int ret, i;
 41
 42	if (fls_long(resource_mask) > num_cores)
 43		return -EINVAL;
 44	size = struct_size(info, logs_core, num_cores);
 45	info = kzalloc(size, GFP_KERNEL);
 46	if (!info)
 47		return -ENOMEM;
 48
 49	info->aging_timer_period = aging_period;
 50	info->fifo_full_timer_period = fifo_full_period;
 51	info->core_mask = resource_mask;
 52	if (enable)
 53		for_each_set_bit(i, &resource_mask, num_cores) {
 54			info->logs_core[i].enable = enable;
 55			info->logs_core[i].min_priority = *priorities++;
 56		}
 57	else
 58		for_each_set_bit(i, &resource_mask, num_cores)
 59			info->logs_core[i].enable = enable;
 60
 61	ret = avs_ipc_set_enable_logs(adev, (u8 *)info, size);
 62	kfree(info);
 63	if (ret)
 64		return AVS_IPC_RET(ret);
 65
 66	return 0;
 67}
 68#endif
 69
 70int avs_apl_log_buffer_status(struct avs_dev *adev, union avs_notify_msg *msg)
 71{
 72	struct avs_apl_log_buffer_layout layout;
 73	void __iomem *addr, *buf;
 74
 75	addr = avs_log_buffer_addr(adev, msg->log.core);
 76	if (!addr)
 77		return -ENXIO;
 78
 79	memcpy_fromio(&layout, addr, sizeof(layout));
 80
 81	if (!avs_logging_fw(adev))
 82		/* consume the logs regardless of consumer presence */
 83		goto update_read_ptr;
 84
 85	buf = avs_apl_log_payload_addr(addr);
 86
 87	if (layout.read_ptr > layout.write_ptr) {
 88		avs_dump_fw_log(adev, buf + layout.read_ptr,
 89				avs_apl_log_payload_size(adev) - layout.read_ptr);
 90		layout.read_ptr = 0;
 91	}
 92	avs_dump_fw_log_wakeup(adev, buf + layout.read_ptr, layout.write_ptr - layout.read_ptr);
 93
 94update_read_ptr:
 95	writel(layout.write_ptr, addr);
 96	return 0;
 97}
 98
 99static int avs_apl_wait_log_entry(struct avs_dev *adev, u32 core,
100				  struct avs_apl_log_buffer_layout *layout)
101{
102	unsigned long timeout;
103	void __iomem *addr;
104
105	addr = avs_log_buffer_addr(adev, core);
106	if (!addr)
107		return -ENXIO;
108
109	timeout = jiffies + msecs_to_jiffies(10);
110
111	do {
112		memcpy_fromio(layout, addr, sizeof(*layout));
113		if (layout->read_ptr != layout->write_ptr)
114			return 0;
115		usleep_range(500, 1000);
116	} while (!time_after(jiffies, timeout));
117
118	return -ETIMEDOUT;
119}
120
121/* reads log header and tests its type */
122#define avs_apl_is_entry_stackdump(addr) ((readl(addr) >> 30) & 0x1)
123
124int avs_apl_coredump(struct avs_dev *adev, union avs_notify_msg *msg)
125{
126	struct avs_apl_log_buffer_layout layout;
127	void __iomem *addr, *buf;
128	size_t dump_size;
129	u32 offset = 0;
130	u8 *dump, *pos;
131
132	dump_size = AVS_FW_REGS_SIZE + msg->ext.coredump.stack_dump_size;
133	dump = vzalloc(dump_size);
134	if (!dump)
135		return -ENOMEM;
136
137	memcpy_fromio(dump, avs_sram_addr(adev, AVS_FW_REGS_WINDOW), AVS_FW_REGS_SIZE);
138
139	if (!msg->ext.coredump.stack_dump_size)
140		goto exit;
141
142	/* Dump the registers even if an external error prevents gathering the stack. */
143	addr = avs_log_buffer_addr(adev, msg->ext.coredump.core_id);
144	if (!addr)
145		goto exit;
146
147	buf = avs_apl_log_payload_addr(addr);
148	memcpy_fromio(&layout, addr, sizeof(layout));
149	if (!avs_apl_is_entry_stackdump(buf + layout.read_ptr)) {
150		union avs_notify_msg lbs_msg = AVS_NOTIFICATION(LOG_BUFFER_STATUS);
151
152		/*
153		 * DSP awaits the remaining logs to be
154		 * gathered before dumping stack
155		 */
156		lbs_msg.log.core = msg->ext.coredump.core_id;
157		avs_log_buffer_status_locked(adev, &lbs_msg);
158	}
159
160	pos = dump + AVS_FW_REGS_SIZE;
161	/* gather the stack */
162	do {
163		u32 count;
164
165		if (avs_apl_wait_log_entry(adev, msg->ext.coredump.core_id, &layout))
166			break;
167
168		if (layout.read_ptr > layout.write_ptr) {
169			count = avs_apl_log_payload_size(adev) - layout.read_ptr;
170			memcpy_fromio(pos + offset, buf + layout.read_ptr, count);
171			layout.read_ptr = 0;
172			offset += count;
173		}
174		count = layout.write_ptr - layout.read_ptr;
175		memcpy_fromio(pos + offset, buf + layout.read_ptr, count);
176		offset += count;
177
178		/* update read pointer */
179		writel(layout.write_ptr, addr);
180	} while (offset < msg->ext.coredump.stack_dump_size);
181
182exit:
183	dev_coredumpv(adev->dev, dump, dump_size, GFP_KERNEL);
184
185	return 0;
186}
187
188static bool avs_apl_lp_streaming(struct avs_dev *adev)
189{
190	struct avs_path *path;
191
192	spin_lock(&adev->path_list_lock);
193	/* Any gateway without buffer allocated in LP area disqualifies D0IX. */
194	list_for_each_entry(path, &adev->path_list, node) {
195		struct avs_path_pipeline *ppl;
196
197		list_for_each_entry(ppl, &path->ppl_list, node) {
198			struct avs_path_module *mod;
199
200			list_for_each_entry(mod, &ppl->mod_list, node) {
201				struct avs_tplg_modcfg_ext *cfg;
202
203				cfg = mod->template->cfg_ext;
204
205				/* only copiers have gateway attributes */
206				if (!guid_equal(&cfg->type, &AVS_COPIER_MOD_UUID))
207					continue;
208				/* non-gateway copiers do not prevent PG */
209				if (cfg->copier.dma_type == INVALID_OBJECT_ID)
210					continue;
211
212				if (!mod->gtw_attrs.lp_buffer_alloc) {
213					spin_unlock(&adev->path_list_lock);
214					return false;
215				}
216			}
217		}
218	}
219	spin_unlock(&adev->path_list_lock);
220
221	return true;
222}
223
224bool avs_apl_d0ix_toggle(struct avs_dev *adev, struct avs_ipc_msg *tx, bool wake)
225{
226	/* wake in all cases */
227	if (wake)
228		return true;
229
230	/*
231	 * If no pipelines are running, allow for d0ix schedule.
232	 * If all gateways have lp=1, allow for d0ix schedule.
233	 * If any gateway with lp=0 is allocated, abort scheduling d0ix.
234	 *
235	 * Note: for cAVS 1.5+ and 1.8, D0IX is LP-firmware transition,
236	 * not the power-gating mechanism known from cAVS 2.0.
237	 */
238	return avs_apl_lp_streaming(adev);
239}
240
241int avs_apl_set_d0ix(struct avs_dev *adev, bool enable)
242{
243	bool streaming = false;
244	int ret;
245
246	if (enable)
247		/* Either idle or all gateways with lp=1. */
248		streaming = !list_empty(&adev->path_list);
249
250	ret = avs_ipc_set_d0ix(adev, enable, streaming);
251	return AVS_IPC_RET(ret);
252}
253
254const struct avs_dsp_ops avs_apl_dsp_ops = {
255	.power = avs_dsp_core_power,
256	.reset = avs_dsp_core_reset,
257	.stall = avs_dsp_core_stall,
258	.dsp_interrupt = avs_apl_dsp_interrupt,
259	.int_control = avs_dsp_interrupt_control,
260	.load_basefw = avs_hda_load_basefw,
261	.load_lib = avs_hda_load_library,
262	.transfer_mods = avs_hda_transfer_modules,
263	.log_buffer_offset = avs_skl_log_buffer_offset,
264	.log_buffer_status = avs_apl_log_buffer_status,
265	.coredump = avs_apl_coredump,
266	.d0ix_toggle = avs_apl_d0ix_toggle,
267	.set_d0ix = avs_apl_set_d0ix,
268	AVS_SET_ENABLE_LOGS_OP(apl)
269};