1// SPDX-License-Identifier: ISC
2/* Copyright (C) 2023 MediaTek Inc. */
3
4#include <linux/module.h>
5#include <linux/firmware.h>
6
7#include "mt792x.h"
8#include "dma.h"
9#include "trace.h"
10
11irqreturn_t mt792x_irq_handler(int irq, void *dev_instance)
12{
13 struct mt792x_dev *dev = dev_instance;
14
15 if (test_bit(MT76_REMOVED, &dev->mt76.phy.state))
16 return IRQ_NONE;
17 mt76_wr(dev, dev->irq_map->host_irq_enable, 0);
18
19 if (!test_bit(MT76_STATE_INITIALIZED, &dev->mphy.state))
20 return IRQ_NONE;
21
22 tasklet_schedule(t: &dev->mt76.irq_tasklet);
23
24 return IRQ_HANDLED;
25}
26EXPORT_SYMBOL_GPL(mt792x_irq_handler);
27
28void mt792x_irq_tasklet(unsigned long data)
29{
30 struct mt792x_dev *dev = (struct mt792x_dev *)data;
31 const struct mt792x_irq_map *irq_map = dev->irq_map;
32 u32 intr, mask = 0;
33
34 mt76_wr(dev, irq_map->host_irq_enable, 0);
35
36 intr = mt76_rr(dev, MT_WFDMA0_HOST_INT_STA);
37 intr &= dev->mt76.mmio.irqmask;
38 mt76_wr(dev, MT_WFDMA0_HOST_INT_STA, intr);
39
40 trace_dev_irq(dev: &dev->mt76, val: intr, mask: dev->mt76.mmio.irqmask);
41
42 mask |= intr & (irq_map->rx.data_complete_mask |
43 irq_map->rx.wm_complete_mask |
44 irq_map->rx.wm2_complete_mask);
45 if (intr & dev->irq_map->tx.mcu_complete_mask)
46 mask |= dev->irq_map->tx.mcu_complete_mask;
47
48 if (intr & MT_INT_MCU_CMD) {
49 u32 intr_sw;
50
51 intr_sw = mt76_rr(dev, MT_MCU_CMD);
52 /* ack MCU2HOST_SW_INT_STA */
53 mt76_wr(dev, MT_MCU_CMD, intr_sw);
54 if (intr_sw & MT_MCU_CMD_WAKE_RX_PCIE) {
55 mask |= irq_map->rx.data_complete_mask;
56 intr |= irq_map->rx.data_complete_mask;
57 }
58 }
59
60 mt76_set_irq_mask(dev: &dev->mt76, addr: irq_map->host_irq_enable, clear: mask, set: 0);
61
62 if (intr & dev->irq_map->tx.all_complete_mask)
63 napi_schedule(n: &dev->mt76.tx_napi);
64
65 if (intr & irq_map->rx.wm_complete_mask)
66 napi_schedule(n: &dev->mt76.napi[MT_RXQ_MCU]);
67
68 if (intr & irq_map->rx.wm2_complete_mask)
69 napi_schedule(n: &dev->mt76.napi[MT_RXQ_MCU_WA]);
70
71 if (intr & irq_map->rx.data_complete_mask)
72 napi_schedule(n: &dev->mt76.napi[MT_RXQ_MAIN]);
73}
74EXPORT_SYMBOL_GPL(mt792x_irq_tasklet);
75
76void mt792x_rx_poll_complete(struct mt76_dev *mdev, enum mt76_rxq_id q)
77{
78 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
79 const struct mt792x_irq_map *irq_map = dev->irq_map;
80
81 if (q == MT_RXQ_MAIN)
82 mt76_connac_irq_enable(dev: mdev, mask: irq_map->rx.data_complete_mask);
83 else if (q == MT_RXQ_MCU_WA)
84 mt76_connac_irq_enable(dev: mdev, mask: irq_map->rx.wm2_complete_mask);
85 else
86 mt76_connac_irq_enable(dev: mdev, mask: irq_map->rx.wm_complete_mask);
87}
88EXPORT_SYMBOL_GPL(mt792x_rx_poll_complete);
89
90#define PREFETCH(base, depth) ((base) << 16 | (depth))
91static void mt792x_dma_prefetch(struct mt792x_dev *dev)
92{
93 if (is_mt7925(dev: &dev->mt76)) {
94 /* rx ring */
95 mt76_wr(dev, MT_WFDMA0_RX_RING0_EXT_CTRL, PREFETCH(0x0000, 0x4));
96 mt76_wr(dev, MT_WFDMA0_RX_RING1_EXT_CTRL, PREFETCH(0x0040, 0x4));
97 mt76_wr(dev, MT_WFDMA0_RX_RING2_EXT_CTRL, PREFETCH(0x0080, 0x4));
98 mt76_wr(dev, MT_WFDMA0_RX_RING3_EXT_CTRL, PREFETCH(0x00c0, 0x4));
99 /* tx ring */
100 mt76_wr(dev, MT_WFDMA0_TX_RING0_EXT_CTRL, PREFETCH(0x0100, 0x10));
101 mt76_wr(dev, MT_WFDMA0_TX_RING1_EXT_CTRL, PREFETCH(0x0200, 0x10));
102 mt76_wr(dev, MT_WFDMA0_TX_RING2_EXT_CTRL, PREFETCH(0x0300, 0x10));
103 mt76_wr(dev, MT_WFDMA0_TX_RING3_EXT_CTRL, PREFETCH(0x0400, 0x10));
104 mt76_wr(dev, MT_WFDMA0_TX_RING15_EXT_CTRL, PREFETCH(0x0500, 0x4));
105 mt76_wr(dev, MT_WFDMA0_TX_RING16_EXT_CTRL, PREFETCH(0x0540, 0x4));
106 } else {
107 /* rx ring */
108 mt76_wr(dev, MT_WFDMA0_RX_RING0_EXT_CTRL, PREFETCH(0x0, 0x4));
109 mt76_wr(dev, MT_WFDMA0_RX_RING2_EXT_CTRL, PREFETCH(0x40, 0x4));
110 mt76_wr(dev, MT_WFDMA0_RX_RING3_EXT_CTRL, PREFETCH(0x80, 0x4));
111 mt76_wr(dev, MT_WFDMA0_RX_RING4_EXT_CTRL, PREFETCH(0xc0, 0x4));
112 mt76_wr(dev, MT_WFDMA0_RX_RING5_EXT_CTRL, PREFETCH(0x100, 0x4));
113 /* tx ring */
114 mt76_wr(dev, MT_WFDMA0_TX_RING0_EXT_CTRL, PREFETCH(0x140, 0x4));
115 mt76_wr(dev, MT_WFDMA0_TX_RING1_EXT_CTRL, PREFETCH(0x180, 0x4));
116 mt76_wr(dev, MT_WFDMA0_TX_RING2_EXT_CTRL, PREFETCH(0x1c0, 0x4));
117 mt76_wr(dev, MT_WFDMA0_TX_RING3_EXT_CTRL, PREFETCH(0x200, 0x4));
118 mt76_wr(dev, MT_WFDMA0_TX_RING4_EXT_CTRL, PREFETCH(0x240, 0x4));
119 mt76_wr(dev, MT_WFDMA0_TX_RING5_EXT_CTRL, PREFETCH(0x280, 0x4));
120 mt76_wr(dev, MT_WFDMA0_TX_RING6_EXT_CTRL, PREFETCH(0x2c0, 0x4));
121 mt76_wr(dev, MT_WFDMA0_TX_RING16_EXT_CTRL, PREFETCH(0x340, 0x4));
122 mt76_wr(dev, MT_WFDMA0_TX_RING17_EXT_CTRL, PREFETCH(0x380, 0x4));
123 }
124}
125
126int mt792x_dma_enable(struct mt792x_dev *dev)
127{
128 /* configure perfetch settings */
129 mt792x_dma_prefetch(dev);
130
131 /* reset dma idx */
132 mt76_wr(dev, MT_WFDMA0_RST_DTX_PTR, ~0);
133 if (is_mt7925(dev: &dev->mt76))
134 mt76_wr(dev, MT_WFDMA0_RST_DRX_PTR, ~0);
135
136 /* configure delay interrupt */
137 mt76_wr(dev, MT_WFDMA0_PRI_DLY_INT_CFG0, 0);
138
139 mt76_set(dev, MT_WFDMA0_GLO_CFG,
140 MT_WFDMA0_GLO_CFG_TX_WB_DDONE |
141 MT_WFDMA0_GLO_CFG_FIFO_LITTLE_ENDIAN |
142 MT_WFDMA0_GLO_CFG_CLK_GAT_DIS |
143 MT_WFDMA0_GLO_CFG_OMIT_TX_INFO |
144 FIELD_PREP(MT_WFDMA0_GLO_CFG_DMA_SIZE, 3) |
145 MT_WFDMA0_GLO_CFG_FIFO_DIS_CHECK |
146 MT_WFDMA0_GLO_CFG_RX_WB_DDONE |
147 MT_WFDMA0_GLO_CFG_CSR_DISP_BASE_PTR_CHAIN_EN |
148 MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2);
149
150 mt76_set(dev, MT_WFDMA0_GLO_CFG,
151 MT_WFDMA0_GLO_CFG_TX_DMA_EN | MT_WFDMA0_GLO_CFG_RX_DMA_EN);
152
153 if (is_mt7925(dev: &dev->mt76)) {
154 mt76_rmw(dev, MT_UWFDMA0_GLO_CFG_EXT1, BIT(28), BIT(28));
155 mt76_set(dev, MT_WFDMA0_INT_RX_PRI, 0x0F00);
156 mt76_set(dev, MT_WFDMA0_INT_TX_PRI, 0x7F00);
157 }
158 mt76_set(dev, MT_WFDMA_DUMMY_CR, MT_WFDMA_NEED_REINIT);
159
160 /* enable interrupts for TX/RX rings */
161 mt76_connac_irq_enable(dev: &dev->mt76,
162 mask: dev->irq_map->tx.all_complete_mask |
163 dev->irq_map->rx.data_complete_mask |
164 dev->irq_map->rx.wm2_complete_mask |
165 dev->irq_map->rx.wm_complete_mask |
166 MT_INT_MCU_CMD);
167 mt76_set(dev, MT_MCU2HOST_SW_INT_ENA, MT_MCU_CMD_WAKE_RX_PCIE);
168
169 return 0;
170}
171EXPORT_SYMBOL_GPL(mt792x_dma_enable);
172
173static int
174mt792x_dma_reset(struct mt792x_dev *dev, bool force)
175{
176 int i, err;
177
178 err = mt792x_dma_disable(dev, force);
179 if (err)
180 return err;
181
182 /* reset hw queues */
183 for (i = 0; i < __MT_TXQ_MAX; i++)
184 mt76_queue_reset(dev, dev->mphy.q_tx[i]);
185
186 for (i = 0; i < __MT_MCUQ_MAX; i++)
187 mt76_queue_reset(dev, dev->mt76.q_mcu[i]);
188
189 mt76_for_each_q_rx(&dev->mt76, i)
190 mt76_queue_reset(dev, &dev->mt76.q_rx[i]);
191
192 mt76_tx_status_check(dev: &dev->mt76, flush: true);
193
194 return mt792x_dma_enable(dev);
195}
196
197int mt792x_wpdma_reset(struct mt792x_dev *dev, bool force)
198{
199 int i, err;
200
201 /* clean up hw queues */
202 for (i = 0; i < ARRAY_SIZE(dev->mt76.phy.q_tx); i++)
203 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[i], true);
204
205 for (i = 0; i < ARRAY_SIZE(dev->mt76.q_mcu); i++)
206 mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[i], true);
207
208 mt76_for_each_q_rx(&dev->mt76, i)
209 mt76_queue_rx_cleanup(dev, &dev->mt76.q_rx[i]);
210
211 if (force) {
212 err = mt792x_wfsys_reset(dev);
213 if (err)
214 return err;
215 }
216 err = mt792x_dma_reset(dev, force);
217 if (err)
218 return err;
219
220 mt76_for_each_q_rx(&dev->mt76, i)
221 mt76_queue_rx_reset(dev, i);
222
223 return 0;
224}
225EXPORT_SYMBOL_GPL(mt792x_wpdma_reset);
226
227int mt792x_wpdma_reinit_cond(struct mt792x_dev *dev)
228{
229 struct mt76_connac_pm *pm = &dev->pm;
230 int err;
231
232 /* check if the wpdma must be reinitialized */
233 if (mt792x_dma_need_reinit(dev)) {
234 /* disable interrutpts */
235 mt76_wr(dev, dev->irq_map->host_irq_enable, 0);
236 mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0x0);
237
238 err = mt792x_wpdma_reset(dev, false);
239 if (err) {
240 dev_err(dev->mt76.dev, "wpdma reset failed\n");
241 return err;
242 }
243
244 /* enable interrutpts */
245 mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0xff);
246 pm->stats.lp_wake++;
247 }
248
249 return 0;
250}
251EXPORT_SYMBOL_GPL(mt792x_wpdma_reinit_cond);
252
253int mt792x_dma_disable(struct mt792x_dev *dev, bool force)
254{
255 /* disable WFDMA0 */
256 mt76_clear(dev, MT_WFDMA0_GLO_CFG,
257 MT_WFDMA0_GLO_CFG_TX_DMA_EN | MT_WFDMA0_GLO_CFG_RX_DMA_EN |
258 MT_WFDMA0_GLO_CFG_CSR_DISP_BASE_PTR_CHAIN_EN |
259 MT_WFDMA0_GLO_CFG_OMIT_TX_INFO |
260 MT_WFDMA0_GLO_CFG_OMIT_RX_INFO |
261 MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2);
262
263 if (!mt76_poll_msec_tick(dev, MT_WFDMA0_GLO_CFG,
264 MT_WFDMA0_GLO_CFG_TX_DMA_BUSY |
265 MT_WFDMA0_GLO_CFG_RX_DMA_BUSY, 0, 100, 1))
266 return -ETIMEDOUT;
267
268 /* disable dmashdl */
269 mt76_clear(dev, MT_WFDMA0_GLO_CFG_EXT0,
270 MT_WFDMA0_CSR_TX_DMASHDL_ENABLE);
271 mt76_set(dev, MT_DMASHDL_SW_CONTROL, MT_DMASHDL_DMASHDL_BYPASS);
272
273 if (force) {
274 /* reset */
275 mt76_clear(dev, MT_WFDMA0_RST,
276 MT_WFDMA0_RST_DMASHDL_ALL_RST |
277 MT_WFDMA0_RST_LOGIC_RST);
278
279 mt76_set(dev, MT_WFDMA0_RST,
280 MT_WFDMA0_RST_DMASHDL_ALL_RST |
281 MT_WFDMA0_RST_LOGIC_RST);
282 }
283
284 return 0;
285}
286EXPORT_SYMBOL_GPL(mt792x_dma_disable);
287
288void mt792x_dma_cleanup(struct mt792x_dev *dev)
289{
290 /* disable */
291 mt76_clear(dev, MT_WFDMA0_GLO_CFG,
292 MT_WFDMA0_GLO_CFG_TX_DMA_EN |
293 MT_WFDMA0_GLO_CFG_RX_DMA_EN |
294 MT_WFDMA0_GLO_CFG_CSR_DISP_BASE_PTR_CHAIN_EN |
295 MT_WFDMA0_GLO_CFG_OMIT_TX_INFO |
296 MT_WFDMA0_GLO_CFG_OMIT_RX_INFO |
297 MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2);
298
299 mt76_poll_msec_tick(dev, MT_WFDMA0_GLO_CFG,
300 MT_WFDMA0_GLO_CFG_TX_DMA_BUSY |
301 MT_WFDMA0_GLO_CFG_RX_DMA_BUSY, 0, 100, 1);
302
303 /* reset */
304 mt76_clear(dev, MT_WFDMA0_RST,
305 MT_WFDMA0_RST_DMASHDL_ALL_RST |
306 MT_WFDMA0_RST_LOGIC_RST);
307
308 mt76_set(dev, MT_WFDMA0_RST,
309 MT_WFDMA0_RST_DMASHDL_ALL_RST |
310 MT_WFDMA0_RST_LOGIC_RST);
311
312 mt76_dma_cleanup(dev: &dev->mt76);
313}
314EXPORT_SYMBOL_GPL(mt792x_dma_cleanup);
315
316int mt792x_poll_tx(struct napi_struct *napi, int budget)
317{
318 struct mt792x_dev *dev;
319
320 dev = container_of(napi, struct mt792x_dev, mt76.tx_napi);
321
322 if (!mt76_connac_pm_ref(phy: &dev->mphy, pm: &dev->pm)) {
323 napi_complete(n: napi);
324 queue_work(wq: dev->mt76.wq, work: &dev->pm.wake_work);
325 return 0;
326 }
327
328 mt76_connac_tx_cleanup(dev: &dev->mt76);
329 if (napi_complete(n: napi))
330 mt76_connac_irq_enable(dev: &dev->mt76,
331 mask: dev->irq_map->tx.all_complete_mask);
332 mt76_connac_pm_unref(phy: &dev->mphy, pm: &dev->pm);
333
334 return 0;
335}
336EXPORT_SYMBOL_GPL(mt792x_poll_tx);
337
338int mt792x_poll_rx(struct napi_struct *napi, int budget)
339{
340 struct mt792x_dev *dev;
341 int done;
342
343 dev = container_of(napi->dev, struct mt792x_dev, mt76.napi_dev);
344
345 if (!mt76_connac_pm_ref(phy: &dev->mphy, pm: &dev->pm)) {
346 napi_complete(n: napi);
347 queue_work(wq: dev->mt76.wq, work: &dev->pm.wake_work);
348 return 0;
349 }
350 done = mt76_dma_rx_poll(napi, budget);
351 mt76_connac_pm_unref(phy: &dev->mphy, pm: &dev->pm);
352
353 return done;
354}
355EXPORT_SYMBOL_GPL(mt792x_poll_rx);
356
357int mt792x_wfsys_reset(struct mt792x_dev *dev)
358{
359 u32 addr = is_mt7921(dev: &dev->mt76) ? 0x18000140 : 0x7c000140;
360
361 mt76_clear(dev, addr, WFSYS_SW_RST_B);
362 msleep(msecs: 50);
363 mt76_set(dev, addr, WFSYS_SW_RST_B);
364
365 if (!__mt76_poll_msec(&dev->mt76, addr, WFSYS_SW_INIT_DONE,
366 WFSYS_SW_INIT_DONE, 500))
367 return -ETIMEDOUT;
368
369 return 0;
370}
371EXPORT_SYMBOL_GPL(mt792x_wfsys_reset);
372
373

source code of linux/drivers/net/wireless/mediatek/mt76/mt792x_dma.c