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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/drivers/soc/rockchip/rockchip_decompress.c
..
..
@@ -93,32 +93,67 @@
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93
 
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 static struct rk_decom *g_decom;
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95
 
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-static DECLARE_WAIT_QUEUE_HEAD(initrd_decom_done);
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-static bool initrd_continue;
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+static DECLARE_WAIT_QUEUE_HEAD(g_decom_wait);
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+static bool g_decom_complete;
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+static bool g_decom_noblocking;
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+static u64 g_decom_data_len;
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100
 
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 void __init wait_initrd_hw_decom_done(void)
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 {
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-	wait_event(initrd_decom_done, initrd_continue);
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+	wait_event(g_decom_wait, g_decom_complete);
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 }
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+
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+int rk_decom_wait_done(u32 timeout, u64 *decom_len)
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+{
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+	int ret;
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+
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+	if (!decom_len)
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+		return -EINVAL;
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+
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+	ret = wait_event_timeout(g_decom_wait, g_decom_complete, timeout * HZ);
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+	if (!ret) {
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+		if (g_decom)
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+			clk_bulk_disable_unprepare(g_decom->num_clocks, g_decom->clocks);
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+
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+		return -ETIMEDOUT;
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+	}
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+
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+	*decom_len = g_decom_data_len;
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+
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+	return 0;
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+}
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+EXPORT_SYMBOL(rk_decom_wait_done);
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126
 
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 static DECLARE_WAIT_QUEUE_HEAD(decom_init_done);
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128
 
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 int rk_decom_start(u32 mode, phys_addr_t src, phys_addr_t dst, u32 dst_max_size)
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 {
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+	int ret;
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 	u32 irq_status;
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 	u32 decom_enr;
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-
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-	pr_info("%s: mode %u src %pa dst %pa max_size %u\n",
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-		__func__, mode, &src, &dst, dst_max_size);
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+	u32 decom_mode = rk_get_decom_mode(mode);
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135
 
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 	wait_event_timeout(decom_init_done, g_decom, HZ);
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 	if (!g_decom)
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 		return -EINVAL;
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139
 
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+	if (g_decom->mem_start)
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+		pr_info("%s: mode %u src %pa dst %pa max_size %u\n",
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+			__func__, mode, &src, &dst, dst_max_size);
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+
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+	ret = clk_bulk_prepare_enable(g_decom->num_clocks, g_decom->clocks);
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+	if (ret)
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+		return ret;
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+
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+	g_decom_complete   = false;
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+	g_decom_data_len   = 0;
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+	g_decom_noblocking = rk_get_noblocking_flag(mode);
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+
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 	decom_enr = readl(g_decom->regs + DECOM_ENR);
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 	if (decom_enr & 0x1) {
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 		pr_err("decompress busy\n");
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-		return -EBUSY;
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+		ret = -EBUSY;
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+		goto error;
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157
 	}
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158
 
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159
 	if (g_decom->reset) {
..
..
@@ -132,7 +167,7 @@
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167
 	if (irq_status)
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168
 		writel(irq_status, g_decom->regs + DECOM_ISR);
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169
 
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-	switch (mode) {
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+	switch (decom_mode) {
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 	case LZ4_MOD:
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 		writel(LZ4_CONT_CSUM_CHECK_EN |
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 		       LZ4_HEAD_CSUM_CHECK_EN |
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@@ -148,8 +183,9 @@
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 		       g_decom->regs + DECOM_CTRL);
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184
 		break;
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 	default:
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-		pr_err("undefined mode : %d\n", mode);
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-		return -EINVAL;
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+		pr_err("undefined mode : %d\n", decom_mode);
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+		ret = -EINVAL;
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+		goto error;
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 	}
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190
 
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 	writel(src, g_decom->regs + DECOM_RADDR);
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@@ -161,9 +197,11 @@
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197
 	writel(DECOM_INT_MASK, g_decom->regs + DECOM_IEN);
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198
 	writel(DECOM_ENABLE, g_decom->regs + DECOM_ENR);
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199
 
164
-	pr_info("%s: started\n", __func__);
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-
166
200
 	return 0;
201
+error:
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+	clk_bulk_disable_unprepare(g_decom->num_clocks, g_decom->clocks);
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+
204
+	return ret;
167
205
 }
168
206
 EXPORT_SYMBOL(rk_decom_start);
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207
 
..
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@@ -179,9 +217,15 @@
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 	if (irq_status & DECOM_STOP) {
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218
 		decom_status = readl(rk_dec->regs + DECOM_STAT);
181
219
 		if (decom_status & DECOM_COMPLETE) {
182
-			initrd_continue = true;
183
-			wake_up(&initrd_decom_done);
184
-			dev_info(rk_dec->dev, "decom completed\n");
220
+			g_decom_complete = true;
221
+			g_decom_data_len = readl(rk_dec->regs + DECOM_TSIZEH);
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+			g_decom_data_len = (g_decom_data_len << 32) |
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+					   readl(rk_dec->regs + DECOM_TSIZEL);
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+			wake_up(&g_decom_wait);
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+			if (rk_dec->mem_start)
226
+				dev_info(rk_dec->dev,
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+					 "decom completed, decom_data_len = %llu\n",
228
+					 g_decom_data_len);
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229
 		} else {
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230
 			dev_info(rk_dec->dev,
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231
 				 "decom failed, irq_status = 0x%x, decom_status = 0x%x, try again !\n",
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..
@@ -190,7 +234,18 @@
190
234
 			print_hex_dump(KERN_WARNING, "", DUMP_PREFIX_OFFSET,
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235
 				       32, 4, rk_dec->regs, 0x128, false);
192
236
 
193
-			writel(DECOM_ENABLE, rk_dec->regs + DECOM_ENR);
237
+			if (g_decom_noblocking) {
238
+				dev_info(rk_dec->dev, "decom failed and exit in noblocking mode.");
239
+				writel(DECOM_DISABLE, rk_dec->regs + DECOM_ENR);
240
+				writel(0, g_decom->regs + DECOM_IEN);
241
+
242
+				g_decom_complete  = true;
243
+				g_decom_data_len = 0;
244
+				g_decom_noblocking = false;
245
+				wake_up(&g_decom_wait);
246
+			} else {
247
+				writel(DECOM_ENABLE, rk_dec->regs + DECOM_ENR);
248
+			}
194
249
 		}
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250
 	}
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251
 
..
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@@ -201,16 +256,20 @@
201
256
 {
202
257
 	struct rk_decom *rk_dec = priv;
203
258
 
204
-	if (initrd_continue) {
259
+	if (g_decom_complete) {
205
260
 		void *start, *end;
206
261
 
207
-		/*
208
-		 * Now it is safe to free reserve memory that
209
-		 * store the origin ramdisk file
210
-		 */
211
-		start = phys_to_virt(rk_dec->mem_start);
212
-		end = start + rk_dec->mem_size;
213
-		free_reserved_area(start, end, -1, "ramdisk gzip archive");
262
+		if (rk_dec->mem_start) {
263
+			/*
264
+			 * Now it is safe to free reserve memory that
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+			 * store the origin ramdisk file
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+			 */
267
+			start = phys_to_virt(rk_dec->mem_start);
268
+			end = start + rk_dec->mem_size;
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+			free_reserved_area(start, end, -1, "ramdisk gzip archive");
270
+			rk_dec->mem_start = 0;
271
+		}
272
+
214
273
 		clk_bulk_disable_unprepare(rk_dec->num_clocks, rk_dec->clocks);
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274
 	}
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275
 
..
..
@@ -259,10 +318,6 @@
259
318
 		dev_err(dev, "failed to get decompress clock\n");
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319
 		return -ENODEV;
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320
 	}
262
-
263
-	ret = clk_bulk_prepare_enable(rk_dec->num_clocks, rk_dec->clocks);
264
-	if (ret)
265
-		return ret;
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321
 
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 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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323
 	rk_dec->regs = devm_ioremap_resource(dev, res);