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Fri, 04 Oct 2019 10:52:22 -0700 (PDT) Date: Fri, 4 Oct 2019 19:52:18 +0200 From: Corentin Labbe To: Maxime Ripard Subject: Re: [PATCH v2 02/11] crypto: Add Allwinner sun8i-ce Crypto Engine Message-ID: <20191004175218.GA11208@Red> References: <20191001184141.27956-1-clabbe.montjoie@gmail.com> <20191001184141.27956-3-clabbe.montjoie@gmail.com> <20191002103506.zdoyhhzmroa6smwl@gilmour> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20191002103506.zdoyhhzmroa6smwl@gilmour> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191004_105226_137593_2E0D3384 X-CRM114-Status: GOOD ( 17.16 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, herbert@gondor.apana.org.au, catalin.marinas@arm.com, linux-sunxi@googlegroups.com, linux@armlinux.org.uk, linux-kernel@vger.kernel.org, wens@csie.org, robh+dt@kernel.org, linux-crypto@vger.kernel.org, will@kernel.org, davem@davemloft.net, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Oct 02, 2019 at 12:35:06PM +0200, Maxime Ripard wrote: > Hi, > > On Tue, Oct 01, 2019 at 08:41:32PM +0200, Corentin Labbe wrote: > > + /* CTS and recent CE (H6) need length in bytes, in word otherwise */ > > + if (ce->variant->model == CE_v2) > > + cet->t_dlen = areq->cryptlen; > > It's entirely redundant withe the compatible. > > How about using something like has_t_dlen or whatever name you find > best in the variant structure? > Hello I will fix that, I started with has_t_dlen_in_bytes > > +static int sun8i_ce_probe(struct platform_device *pdev) > > +{ > > + struct resource *res; > > + u32 v; > > + int err, i, ce_method, id, irq; > > + unsigned long cr; > > + struct sun8i_ce_dev *ce; > > + > > + ce = devm_kzalloc(&pdev->dev, sizeof(*ce), GFP_KERNEL); > > + if (!ce) > > + return -ENOMEM; > > + > > + ce->dev = &pdev->dev; > > + platform_set_drvdata(pdev, ce); > > + > > + ce->variant = of_device_get_match_data(&pdev->dev); > > + if (!ce->variant) { > > + dev_err(&pdev->dev, "Missing Crypto Engine variant\n"); > > + return -EINVAL; > > + } > > + > > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > > + ce->base = devm_ioremap_resource(&pdev->dev, res); > > + if (IS_ERR(ce->base)) > > + return PTR_ERR(ce->base); > > + > > + for (i = 0; i < CE_MAX_CLOCKS; i++) { > > + if (!ce->variant->ce_clks[i].name) > > + continue; > > + ce->ceclks[i] = devm_clk_get(&pdev->dev, ce->variant->ce_clks[i].name); > > + if (IS_ERR(ce->ceclks[i])) { > > + err = PTR_ERR(ce->ceclks[i]); > > + dev_err(&pdev->dev, "Cannot get %s CE clock err=%d\n", > > + ce->variant->ce_clks[i].name, err); > > + return err; > > + } > > + cr = clk_get_rate(ce->ceclks[i]); > > + if (!cr) > > + return -EINVAL; > > + if (ce->variant->ce_clks[i].freq > 0 && > > + cr != ce->variant->ce_clks[i].freq) { > > + dev_info(&pdev->dev, "Set %s clock to %lu (%lu Mhz) from %lu (%lu Mhz)\n", > > + ce->variant->ce_clks[i].name, > > + ce->variant->ce_clks[i].freq, > > + ce->variant->ce_clks[i].freq / 1000000, > > + cr, cr / 1000000); > > + err = clk_set_rate(ce->ceclks[i], ce->variant->ce_clks[i].freq); > > + if (err) > > + dev_err(&pdev->dev, "Fail to set %s clk speed to %lu hz\n", > > + ce->variant->ce_clks[i].name, > > + ce->variant->ce_clks[i].freq); > > + } > > + if (ce->variant->ce_clks[i].max_freq > 0 && > > + cr > ce->variant->ce_clks[i].max_freq) > > + dev_warn(&pdev->dev, "Frequency for %s (%lu hz) is higher than datasheet's recommandation (%lu hz)", > > + ce->variant->ce_clks[i].name, cr, > > + ce->variant->ce_clks[i].max_freq); > > + } > > + > > + /* Get Non Secure IRQ */ > > + irq = platform_get_irq(pdev, 0); > > + if (irq < 0) { > > + dev_err(ce->dev, "Cannot get CryptoEngine Non-secure IRQ\n"); > > + return irq; > > + } > > + > > + ce->reset = devm_reset_control_get_optional(&pdev->dev, "bus"); > > + if (IS_ERR(ce->reset)) { > > + if (PTR_ERR(ce->reset) == -EPROBE_DEFER) > > + return PTR_ERR(ce->reset); > > + dev_err(&pdev->dev, "No reset control found\n"); > > + return PTR_ERR(ce->reset); > > + } > > + > > + mutex_init(&ce->mlock); > > + > > + err = allocate_chanlist(ce); > > + if (err) > > + return err; > > + > > + err = sun8i_ce_pm_init(ce); > > + if (err) > > + goto error_pm; > > + > > + err = devm_request_irq(&pdev->dev, irq, ce_irq_handler, 0, > > + "sun8i-ce-ns", ce); > > + if (err) { > > + dev_err(ce->dev, "Cannot request CryptoEngine Non-secure IRQ (err=%d)\n", err); > > + goto error_irq; > > + } > > + > > + for (i = 0; i < ARRAY_SIZE(ce_algs); i++) { > > + ce_algs[i].ce = ce; > > + switch (ce_algs[i].type) { > > + case CRYPTO_ALG_TYPE_SKCIPHER: > > + id = ce_algs[i].ce_algo_id; > > + ce_method = ce->variant->alg_cipher[id]; > > + if (ce_method == CE_ID_NOTSUPP) { > > + dev_info(ce->dev, > > + "DEBUG: Algo of %s not supported\n", > > + ce_algs[i].alg.skcipher.base.cra_name); > > + ce_algs[i].ce = NULL; > > + break; > > + } > > + id = ce_algs[i].ce_blockmode; > > + ce_method = ce->variant->op_mode[id]; > > + if (ce_method == CE_ID_NOTSUPP) { > > + dev_info(ce->dev, "DEBUG: Blockmode of %s not supported\n", > > + ce_algs[i].alg.skcipher.base.cra_name); > > + ce_algs[i].ce = NULL; > > + break; > > + } > > + dev_info(ce->dev, "DEBUG: Register %s\n", > > + ce_algs[i].alg.skcipher.base.cra_name); > > + err = crypto_register_skcipher(&ce_algs[i].alg.skcipher); > > + if (err) { > > + dev_err(ce->dev, "Fail to register %s\n", > > + ce_algs[i].alg.skcipher.base.cra_name); > > + ce_algs[i].ce = NULL; > > + goto error_alg; > > + } > > + break; > > + default: > > + ce_algs[i].ce = NULL; > > + dev_err(ce->dev, "ERROR: tryed to register an unknown algo\n"); > > + } > > + } > > + > > + err = pm_runtime_get_sync(ce->dev); > > + if (err < 0) > > + goto error_alg; > > + > > + v = readl(ce->base + CE_CTR); > > + v >>= CE_DIE_ID_SHIFT; > > + v &= CE_DIE_ID_MASK; > > + dev_info(&pdev->dev, "CryptoEngine Die ID %x\n", v); > > + > > + pm_runtime_put_sync(ce->dev); > > + > > +#ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG > > + /* Ignore error of debugfs */ > > + ce->dbgfs_dir = debugfs_create_dir("sun8i-ce", NULL); > > + ce->dbgfs_stats = debugfs_create_file("stats", 0444, > > + ce->dbgfs_dir, ce, > > + &sun8i_ce_debugfs_fops); > > +#endif > > + return 0; > > +error_alg: > > + unregister_algs(ce); > > + i = MAXFLOW; > > +error_irq: > > + sun8i_ce_pm_exit(ce); > > +error_pm: > > + free_chanlist(ce, i); > > + return err; > > +} > > It's still pretty long. Can you move the clocks, algo initialisation > (and debugfs maybe?) to a function of their own? > It is much cleaner with clock and algo init in functions, thanks! Regards _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel