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 <clabbe@baylibre.com>
7  * Core file which registers crypto algorithms supported by the hardware.
10 #include <linux/crypto.h>
18 #include <crypto/internal/skcipher.h>
19 #include <linux/dma-mapping.h>
21 #include "amlogic-gxl.h"
30 		if (mc->irqs[flow] == irq) {  in meson_irq_handler()
31 			p = readl(mc->base + ((0x04 + flow) << 2));  in meson_irq_handler()
33 				writel_relaxed(0xF, mc->base + ((0x4 + flow) << 2));  in meson_irq_handler()
34 				mc->chanlist[flow].status = 1;  in meson_irq_handler()
35 				complete(&mc->chanlist[flow].complete);  in meson_irq_handler()
38 			dev_err(mc->dev, "%s %d Got irq for flow %d but ctrl is empty\n", __func__, irq, flow);  in meson_irq_handler()
42 	dev_err(mc->dev, "%s %d from unknown irq\n", __func__, irq);  in meson_irq_handler()
53 			.cra_driver_name = "cbc-aes-gxl",
79 			.cra_driver_name = "ecb-aes-gxl",
103 	struct meson_dev *mc = seq->private;  in meson_debugfs_show()
107 		seq_printf(seq, "Channel %d: nreq %lu\n", i, mc->chanlist[i].stat_req);  in meson_debugfs_show()
127 		crypto_engine_exit(mc->chanlist[i].engine);  in meson_free_chanlist()
128 		if (mc->chanlist[i].tl)  in meson_free_chanlist()
129 			dma_free_coherent(mc->dev, sizeof(struct meson_desc) * MAXDESC,  in meson_free_chanlist()
130 					  mc->chanlist[i].tl,  in meson_free_chanlist()
131 					  mc->chanlist[i].t_phy);  in meson_free_chanlist()
132 		i--;  in meson_free_chanlist()
143 	mc->chanlist = devm_kcalloc(mc->dev, MAXFLOW,  in meson_allocate_chanlist()
145 	if (!mc->chanlist)  in meson_allocate_chanlist()
146 		return -ENOMEM;  in meson_allocate_chanlist()
149 		init_completion(&mc->chanlist[i].complete);  in meson_allocate_chanlist()
151 		mc->chanlist[i].engine = crypto_engine_alloc_init(mc->dev, true);  in meson_allocate_chanlist()
152 		if (!mc->chanlist[i].engine) {  in meson_allocate_chanlist()
153 			dev_err(mc->dev, "Cannot allocate engine\n");  in meson_allocate_chanlist()
154 			i--;  in meson_allocate_chanlist()
155 			err = -ENOMEM;  in meson_allocate_chanlist()
158 		err = crypto_engine_start(mc->chanlist[i].engine);  in meson_allocate_chanlist()
160 			dev_err(mc->dev, "Cannot start engine\n");  in meson_allocate_chanlist()
163 		mc->chanlist[i].tl = dma_alloc_coherent(mc->dev,  in meson_allocate_chanlist()
165 							&mc->chanlist[i].t_phy,  in meson_allocate_chanlist()
167 		if (!mc->chanlist[i].tl) {  in meson_allocate_chanlist()
168 			err = -ENOMEM;  in meson_allocate_chanlist()
188 				dev_err(mc->dev, "Fail to register %s\n",  in meson_register_algs()
220 	mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL);  in meson_crypto_probe()
222 		return -ENOMEM;  in meson_crypto_probe()
224 	mc->dev = &pdev->dev;  in meson_crypto_probe()
227 	mc->base = devm_platform_ioremap_resource(pdev, 0);  in meson_crypto_probe()
228 	if (IS_ERR(mc->base)) {  in meson_crypto_probe()
229 		err = PTR_ERR(mc->base);  in meson_crypto_probe()
230 		dev_err(&pdev->dev, "Cannot request MMIO err=%d\n", err);  in meson_crypto_probe()
233 	mc->busclk = devm_clk_get(&pdev->dev, "blkmv");  in meson_crypto_probe()
234 	if (IS_ERR(mc->busclk)) {  in meson_crypto_probe()
235 		err = PTR_ERR(mc->busclk);  in meson_crypto_probe()
236 		dev_err(&pdev->dev, "Cannot get core clock err=%d\n", err);  in meson_crypto_probe()
240 	mc->irqs = devm_kcalloc(mc->dev, MAXFLOW, sizeof(int), GFP_KERNEL);  in meson_crypto_probe()
242 		mc->irqs[i] = platform_get_irq(pdev, i);  in meson_crypto_probe()
243 		if (mc->irqs[i] < 0)  in meson_crypto_probe()
244 			return mc->irqs[i];  in meson_crypto_probe()
246 		err = devm_request_irq(&pdev->dev, mc->irqs[i], meson_irq_handler, 0,  in meson_crypto_probe()
247 				       "gxl-crypto", mc);  in meson_crypto_probe()
249 			dev_err(mc->dev, "Cannot request IRQ for flow %d\n", i);  in meson_crypto_probe()
254 	err = clk_prepare_enable(mc->busclk);  in meson_crypto_probe()
256 		dev_err(&pdev->dev, "Cannot prepare_enable busclk\n");  in meson_crypto_probe()
269 	mc->dbgfs_dir = debugfs_create_dir("gxl-crypto", NULL);  in meson_crypto_probe()
270 	debugfs_create_file("stats", 0444, mc->dbgfs_dir, mc, &meson_debugfs_fops);  in meson_crypto_probe()
277 	meson_free_chanlist(mc, MAXFLOW - 1);  in meson_crypto_probe()
278 	clk_disable_unprepare(mc->busclk);  in meson_crypto_probe()
287 	debugfs_remove_recursive(mc->dbgfs_dir);  in meson_crypto_remove()
292 	meson_free_chanlist(mc, MAXFLOW - 1);  in meson_crypto_remove()
294 	clk_disable_unprepare(mc->busclk);  in meson_crypto_remove()
299 	{ .compatible = "amlogic,gxl-crypto", },
308 		.name		   = "gxl-crypto",
315 MODULE_DESCRIPTION("Amlogic GXL cryptographic offloader");