1 // SPDX-License-Identifier: GPL-2.0
3  * amlgoic-core.c - hardware cryptographic offloader for Amlogic GXL SoC
5  * Copyright (C) 2018-2019 Corentin Labbe <[email protected]>
7  * Core file which registers crypto algorithms supported by the hardware.
10 #include <crypto/engine.h>
11 #include <crypto/internal/skcipher.h>
13 #include <linux/dma-mapping.h>
23 #include "amlogic-gxl.h"
32 		if (mc->irqs[flow] == irq) {  in meson_irq_handler()
33 			p = readl(mc->base + ((0x04 + flow) << 2));  in meson_irq_handler()
35 				writel_relaxed(0xF, mc->base + ((0x4 + flow) << 2));  in meson_irq_handler()
36 				mc->chanlist[flow].status = 1;  in meson_irq_handler()
37 				complete(&mc->chanlist[flow].complete);  in meson_irq_handler()
40 			dev_err(mc->dev, "%s %d Got irq for flow %d but ctrl is empty\n", __func__, irq, flow);  in meson_irq_handler()
44 	dev_err(mc->dev, "%s %d from unknown irq\n", __func__, irq);  in meson_irq_handler()
55 			.cra_driver_name = "cbc-aes-gxl",
84 			.cra_driver_name = "ecb-aes-gxl",
110 	struct meson_dev *mc __maybe_unused = seq->private;  in meson_debugfs_show()
116 			   mc->chanlist[i].stat_req);  in meson_debugfs_show()
142 		crypto_engine_exit(mc->chanlist[i].engine);  in meson_free_chanlist()
143 		if (mc->chanlist[i].tl)  in meson_free_chanlist()
144 			dma_free_coherent(mc->dev, sizeof(struct meson_desc) * MAXDESC,  in meson_free_chanlist()
145 					  mc->chanlist[i].tl,  in meson_free_chanlist()
146 					  mc->chanlist[i].t_phy);  in meson_free_chanlist()
147 		i--;  in meson_free_chanlist()
158 	mc->chanlist = devm_kcalloc(mc->dev, MAXFLOW,  in meson_allocate_chanlist()
160 	if (!mc->chanlist)  in meson_allocate_chanlist()
161 		return -ENOMEM;  in meson_allocate_chanlist()
164 		init_completion(&mc->chanlist[i].complete);  in meson_allocate_chanlist()
166 		mc->chanlist[i].engine = crypto_engine_alloc_init(mc->dev, true);  in meson_allocate_chanlist()
167 		if (!mc->chanlist[i].engine) {  in meson_allocate_chanlist()
168 			dev_err(mc->dev, "Cannot allocate engine\n");  in meson_allocate_chanlist()
169 			i--;  in meson_allocate_chanlist()
170 			err = -ENOMEM;  in meson_allocate_chanlist()
173 		err = crypto_engine_start(mc->chanlist[i].engine);  in meson_allocate_chanlist()
175 			dev_err(mc->dev, "Cannot start engine\n");  in meson_allocate_chanlist()
178 		mc->chanlist[i].tl = dma_alloc_coherent(mc->dev,  in meson_allocate_chanlist()
180 							&mc->chanlist[i].t_phy,  in meson_allocate_chanlist()
182 		if (!mc->chanlist[i].tl) {  in meson_allocate_chanlist()
183 			err = -ENOMEM;  in meson_allocate_chanlist()
203 				dev_err(mc->dev, "Fail to register %s\n",  in meson_register_algs()
235 	mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL);  in meson_crypto_probe()
237 		return -ENOMEM;  in meson_crypto_probe()
239 	mc->dev = &pdev->dev;  in meson_crypto_probe()
242 	mc->base = devm_platform_ioremap_resource(pdev, 0);  in meson_crypto_probe()
243 	if (IS_ERR(mc->base))  in meson_crypto_probe()
244 		return PTR_ERR(mc->base);  in meson_crypto_probe()
246 	mc->busclk = devm_clk_get(&pdev->dev, "blkmv");  in meson_crypto_probe()
247 	if (IS_ERR(mc->busclk)) {  in meson_crypto_probe()
248 		err = PTR_ERR(mc->busclk);  in meson_crypto_probe()
249 		dev_err(&pdev->dev, "Cannot get core clock err=%d\n", err);  in meson_crypto_probe()
254 		mc->irqs[i] = platform_get_irq(pdev, i);  in meson_crypto_probe()
255 		if (mc->irqs[i] < 0)  in meson_crypto_probe()
256 			return mc->irqs[i];  in meson_crypto_probe()
258 		err = devm_request_irq(&pdev->dev, mc->irqs[i], meson_irq_handler, 0,  in meson_crypto_probe()
259 				       "gxl-crypto", mc);  in meson_crypto_probe()
261 			dev_err(mc->dev, "Cannot request IRQ for flow %d\n", i);  in meson_crypto_probe()
266 	err = clk_prepare_enable(mc->busclk);  in meson_crypto_probe()
268 		dev_err(&pdev->dev, "Cannot prepare_enable busclk\n");  in meson_crypto_probe()
283 		dbgfs_dir = debugfs_create_dir("gxl-crypto", NULL);  in meson_crypto_probe()
287 		mc->dbgfs_dir = dbgfs_dir;  in meson_crypto_probe()
295 	meson_free_chanlist(mc, MAXFLOW - 1);  in meson_crypto_probe()
296 	clk_disable_unprepare(mc->busclk);  in meson_crypto_probe()
305 	debugfs_remove_recursive(mc->dbgfs_dir);  in meson_crypto_remove()
310 	meson_free_chanlist(mc, MAXFLOW - 1);  in meson_crypto_remove()
312 	clk_disable_unprepare(mc->busclk);  in meson_crypto_remove()
316 	{ .compatible = "amlogic,gxl-crypto", },
325 		.name		   = "gxl-crypto",