On Sat, 8 Apr 2023 at 23:40, Abel Vesa <abel.vesa@xxxxxxxxxx> wrote: > > Now that there is a new dedicated ICE driver, drop the sdhci-msm ICE > implementation and use the new ICE api provided by the Qualcomm soc > driver ice. The platforms that already have ICE support will use the > API as library since there will not be a devicetree node, but instead > they have reg range. In this case, the of_qcom_ice_get will return an > ICE instance created for the consumer's device. But if there are > platforms that do not have ice reg in the consumer devicetree node > and instead provide a dedicated ICE devicetree node, theof_qcom_ice_get > will look up the device based on qcom,ice property and will get the ICE > instance registered by the probe function of the ice driver. > > The ICE clock is now handle by the new driver. This is done by enabling > it on the creation of the ICE instance and then enabling/disabling it on > SDCC runtime resume/suspend. > > Signed-off-by: Abel Vesa <abel.vesa@xxxxxxxxxx> Acked-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> Bjorn, I think it should be easier if you pick this together with qcom soc driver changes. I don't think there is any conflict with changes in my mmc tree. Otherwise, I will just wait for the next release cycle. Kind regards Uffe > --- > > The v6 is here: > https://lore.kernel.org/all/20230407105029.2274111-6-abel.vesa@xxxxxxxxxx/ > > Changes since v6: > * none > > Changes since v5: > * Reworded the commit message to add information about what happens > with the ICE clock and who handles it. > * Added temp ice variable to avoid setting the host ice to any value > until a valid one is provided. > * Dropped the qcom_scm.h include as it is not used anymore now that we > moved that to the new ICE driver > > Changes since v4: > * none > > Changes since v3: > * added back the checks for and the setting of MMC_CAP2_CRYPTO > * added enable/resume/suspend implementation for !CONFIG_MMC_CRYPTO > * dropped cfg->crypto_cap_idx argument from qcom_ice_program_key > > Changes since v2: > * added the suspend API call for ICE > * kept old wrappers over ICE API in > > Changes since v1: > * Added a check for supported algorithm and key size > and passed the ICE defined values for algorithm and key size > * Added call to evict function > > drivers/mmc/host/Kconfig | 2 +- > drivers/mmc/host/sdhci-msm.c | 223 ++++++++--------------------------- > 2 files changed, 48 insertions(+), 177 deletions(-) > > diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig > index 4745fe217ade..09f837df5435 100644 > --- a/drivers/mmc/host/Kconfig > +++ b/drivers/mmc/host/Kconfig > @@ -549,7 +549,7 @@ config MMC_SDHCI_MSM > depends on MMC_SDHCI_PLTFM > select MMC_SDHCI_IO_ACCESSORS > select MMC_CQHCI > - select QCOM_SCM if MMC_CRYPTO > + select QCOM_INLINE_CRYPTO_ENGINE if MMC_CRYPTO > help > This selects the Secure Digital Host Controller Interface (SDHCI) > support present in Qualcomm SOCs. The controller supports > diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c > index 8ac81d57a3df..98171bf5748c 100644 > --- a/drivers/mmc/host/sdhci-msm.c > +++ b/drivers/mmc/host/sdhci-msm.c > @@ -13,12 +13,13 @@ > #include <linux/pm_opp.h> > #include <linux/slab.h> > #include <linux/iopoll.h> > -#include <linux/firmware/qcom/qcom_scm.h> > #include <linux/regulator/consumer.h> > #include <linux/interconnect.h> > #include <linux/pinctrl/consumer.h> > #include <linux/reset.h> > > +#include <soc/qcom/ice.h> > + > #include "sdhci-cqhci.h" > #include "sdhci-pltfm.h" > #include "cqhci.h" > @@ -258,12 +259,14 @@ struct sdhci_msm_variant_info { > struct sdhci_msm_host { > struct platform_device *pdev; > void __iomem *core_mem; /* MSM SDCC mapped address */ > - void __iomem *ice_mem; /* MSM ICE mapped address (if available) */ > int pwr_irq; /* power irq */ > struct clk *bus_clk; /* SDHC bus voter clock */ > struct clk *xo_clk; /* TCXO clk needed for FLL feature of cm_dll*/ > - /* core, iface, cal, sleep, and ice clocks */ > - struct clk_bulk_data bulk_clks[5]; > + /* core, iface, cal and sleep clocks */ > + struct clk_bulk_data bulk_clks[4]; > +#ifdef CONFIG_MMC_CRYPTO > + struct qcom_ice *ice; > +#endif > unsigned long clk_rate; > struct mmc_host *mmc; > bool use_14lpp_dll_reset; > @@ -1804,164 +1807,51 @@ static void sdhci_msm_set_clock(struct sdhci_host *host, unsigned int clock) > > #ifdef CONFIG_MMC_CRYPTO > > -#define AES_256_XTS_KEY_SIZE 64 > - > -/* QCOM ICE registers */ > - > -#define QCOM_ICE_REG_VERSION 0x0008 > - > -#define QCOM_ICE_REG_FUSE_SETTING 0x0010 > -#define QCOM_ICE_FUSE_SETTING_MASK 0x1 > -#define QCOM_ICE_FORCE_HW_KEY0_SETTING_MASK 0x2 > -#define QCOM_ICE_FORCE_HW_KEY1_SETTING_MASK 0x4 > - > -#define QCOM_ICE_REG_BIST_STATUS 0x0070 > -#define QCOM_ICE_BIST_STATUS_MASK 0xF0000000 > - > -#define QCOM_ICE_REG_ADVANCED_CONTROL 0x1000 > - > -#define sdhci_msm_ice_writel(host, val, reg) \ > - writel((val), (host)->ice_mem + (reg)) > -#define sdhci_msm_ice_readl(host, reg) \ > - readl((host)->ice_mem + (reg)) > - > -static bool sdhci_msm_ice_supported(struct sdhci_msm_host *msm_host) > -{ > - struct device *dev = mmc_dev(msm_host->mmc); > - u32 regval = sdhci_msm_ice_readl(msm_host, QCOM_ICE_REG_VERSION); > - int major = regval >> 24; > - int minor = (regval >> 16) & 0xFF; > - int step = regval & 0xFFFF; > - > - /* For now this driver only supports ICE version 3. */ > - if (major != 3) { > - dev_warn(dev, "Unsupported ICE version: v%d.%d.%d\n", > - major, minor, step); > - return false; > - } > - > - dev_info(dev, "Found QC Inline Crypto Engine (ICE) v%d.%d.%d\n", > - major, minor, step); > - > - /* If fuses are blown, ICE might not work in the standard way. */ > - regval = sdhci_msm_ice_readl(msm_host, QCOM_ICE_REG_FUSE_SETTING); > - if (regval & (QCOM_ICE_FUSE_SETTING_MASK | > - QCOM_ICE_FORCE_HW_KEY0_SETTING_MASK | > - QCOM_ICE_FORCE_HW_KEY1_SETTING_MASK)) { > - dev_warn(dev, "Fuses are blown; ICE is unusable!\n"); > - return false; > - } > - return true; > -} > - > -static inline struct clk *sdhci_msm_ice_get_clk(struct device *dev) > -{ > - return devm_clk_get(dev, "ice"); > -} > - > static int sdhci_msm_ice_init(struct sdhci_msm_host *msm_host, > struct cqhci_host *cq_host) > { > struct mmc_host *mmc = msm_host->mmc; > struct device *dev = mmc_dev(mmc); > - struct resource *res; > + struct qcom_ice *ice; > > if (!(cqhci_readl(cq_host, CQHCI_CAP) & CQHCI_CAP_CS)) > return 0; > > - res = platform_get_resource_byname(msm_host->pdev, IORESOURCE_MEM, > - "ice"); > - if (!res) { > - dev_warn(dev, "ICE registers not found\n"); > - goto disable; > - } > - > - if (!qcom_scm_ice_available()) { > - dev_warn(dev, "ICE SCM interface not found\n"); > - goto disable; > + ice = of_qcom_ice_get(dev); > + if (ice == ERR_PTR(-EOPNOTSUPP)) { > + dev_warn(dev, "Disabling inline encryption support\n"); > + ice = NULL; > } > > - msm_host->ice_mem = devm_ioremap_resource(dev, res); > - if (IS_ERR(msm_host->ice_mem)) > - return PTR_ERR(msm_host->ice_mem); > - > - if (!sdhci_msm_ice_supported(msm_host)) > - goto disable; > + if (IS_ERR_OR_NULL(ice)) > + return PTR_ERR_OR_ZERO(ice); > > + msm_host->ice = ice; > mmc->caps2 |= MMC_CAP2_CRYPTO; > - return 0; > > -disable: > - dev_warn(dev, "Disabling inline encryption support\n"); > return 0; > } > > -static void sdhci_msm_ice_low_power_mode_enable(struct sdhci_msm_host *msm_host) > -{ > - u32 regval; > - > - regval = sdhci_msm_ice_readl(msm_host, QCOM_ICE_REG_ADVANCED_CONTROL); > - /* > - * Enable low power mode sequence > - * [0]-0, [1]-0, [2]-0, [3]-E, [4]-0, [5]-0, [6]-0, [7]-0 > - */ > - regval |= 0x7000; > - sdhci_msm_ice_writel(msm_host, regval, QCOM_ICE_REG_ADVANCED_CONTROL); > -} > - > -static void sdhci_msm_ice_optimization_enable(struct sdhci_msm_host *msm_host) > +static void sdhci_msm_ice_enable(struct sdhci_msm_host *msm_host) > { > - u32 regval; > - > - /* ICE Optimizations Enable Sequence */ > - regval = sdhci_msm_ice_readl(msm_host, QCOM_ICE_REG_ADVANCED_CONTROL); > - regval |= 0xD807100; > - /* ICE HPG requires delay before writing */ > - udelay(5); > - sdhci_msm_ice_writel(msm_host, regval, QCOM_ICE_REG_ADVANCED_CONTROL); > - udelay(5); > + if (msm_host->mmc->caps2 & MMC_CAP2_CRYPTO) > + qcom_ice_enable(msm_host->ice); > } > > -/* > - * Wait until the ICE BIST (built-in self-test) has completed. > - * > - * This may be necessary before ICE can be used. > - * > - * Note that we don't really care whether the BIST passed or failed; we really > - * just want to make sure that it isn't still running. This is because (a) the > - * BIST is a FIPS compliance thing that never fails in practice, (b) ICE is > - * documented to reject crypto requests if the BIST fails, so we needn't do it > - * in software too, and (c) properly testing storage encryption requires testing > - * the full storage stack anyway, and not relying on hardware-level self-tests. > - */ > -static int sdhci_msm_ice_wait_bist_status(struct sdhci_msm_host *msm_host) > +static __maybe_unused int sdhci_msm_ice_resume(struct sdhci_msm_host *msm_host) > { > - u32 regval; > - int err; > + if (msm_host->mmc->caps2 & MMC_CAP2_CRYPTO) > + return qcom_ice_resume(msm_host->ice); > > - err = readl_poll_timeout(msm_host->ice_mem + QCOM_ICE_REG_BIST_STATUS, > - regval, !(regval & QCOM_ICE_BIST_STATUS_MASK), > - 50, 5000); > - if (err) > - dev_err(mmc_dev(msm_host->mmc), > - "Timed out waiting for ICE self-test to complete\n"); > - return err; > + return 0; > } > > -static void sdhci_msm_ice_enable(struct sdhci_msm_host *msm_host) > +static __maybe_unused int sdhci_msm_ice_suspend(struct sdhci_msm_host *msm_host) > { > - if (!(msm_host->mmc->caps2 & MMC_CAP2_CRYPTO)) > - return; > - sdhci_msm_ice_low_power_mode_enable(msm_host); > - sdhci_msm_ice_optimization_enable(msm_host); > - sdhci_msm_ice_wait_bist_status(msm_host); > -} > + if (msm_host->mmc->caps2 & MMC_CAP2_CRYPTO) > + return qcom_ice_suspend(msm_host->ice); > > -static int __maybe_unused sdhci_msm_ice_resume(struct sdhci_msm_host *msm_host) > -{ > - if (!(msm_host->mmc->caps2 & MMC_CAP2_CRYPTO)) > - return 0; > - return sdhci_msm_ice_wait_bist_status(msm_host); > + return 0; > } > > /* > @@ -1972,48 +1862,28 @@ static int sdhci_msm_program_key(struct cqhci_host *cq_host, > const union cqhci_crypto_cfg_entry *cfg, > int slot) > { > - struct device *dev = mmc_dev(cq_host->mmc); > + struct sdhci_host *host = mmc_priv(cq_host->mmc); > + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); > + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); > union cqhci_crypto_cap_entry cap; > - union { > - u8 bytes[AES_256_XTS_KEY_SIZE]; > - u32 words[AES_256_XTS_KEY_SIZE / sizeof(u32)]; > - } key; > - int i; > - int err; > - > - if (!(cfg->config_enable & CQHCI_CRYPTO_CONFIGURATION_ENABLE)) > - return qcom_scm_ice_invalidate_key(slot); > > /* Only AES-256-XTS has been tested so far. */ > cap = cq_host->crypto_cap_array[cfg->crypto_cap_idx]; > if (cap.algorithm_id != CQHCI_CRYPTO_ALG_AES_XTS || > - cap.key_size != CQHCI_CRYPTO_KEY_SIZE_256) { > - dev_err_ratelimited(dev, > - "Unhandled crypto capability; algorithm_id=%d, key_size=%d\n", > - cap.algorithm_id, cap.key_size); > + cap.key_size != CQHCI_CRYPTO_KEY_SIZE_256) > return -EINVAL; > - } > > - memcpy(key.bytes, cfg->crypto_key, AES_256_XTS_KEY_SIZE); > - > - /* > - * The SCM call byte-swaps the 32-bit words of the key. So we have to > - * do the same, in order for the final key be correct. > - */ > - for (i = 0; i < ARRAY_SIZE(key.words); i++) > - __cpu_to_be32s(&key.words[i]); > - > - err = qcom_scm_ice_set_key(slot, key.bytes, AES_256_XTS_KEY_SIZE, > - QCOM_SCM_ICE_CIPHER_AES_256_XTS, > - cfg->data_unit_size); > - memzero_explicit(&key, sizeof(key)); > - return err; > + if (cfg->config_enable & CQHCI_CRYPTO_CONFIGURATION_ENABLE) > + return qcom_ice_program_key(msm_host->ice, > + QCOM_ICE_CRYPTO_ALG_AES_XTS, > + QCOM_ICE_CRYPTO_KEY_SIZE_256, > + cfg->crypto_key, > + cfg->data_unit_size, slot); > + else > + return qcom_ice_evict_key(msm_host->ice, slot); > } > + > #else /* CONFIG_MMC_CRYPTO */ > -static inline struct clk *sdhci_msm_ice_get_clk(struct device *dev) > -{ > - return NULL; > -} > > static inline int sdhci_msm_ice_init(struct sdhci_msm_host *msm_host, > struct cqhci_host *cq_host) > @@ -2025,11 +1895,17 @@ static inline void sdhci_msm_ice_enable(struct sdhci_msm_host *msm_host) > { > } > > -static inline int __maybe_unused > +static inline __maybe_unused int > sdhci_msm_ice_resume(struct sdhci_msm_host *msm_host) > { > return 0; > } > + > +static inline __maybe_unused int > +sdhci_msm_ice_suspend(struct sdhci_msm_host *msm_host) > +{ > + return 0; > +} > #endif /* !CONFIG_MMC_CRYPTO */ > > /*****************************************************************************\ > @@ -2630,11 +2506,6 @@ static int sdhci_msm_probe(struct platform_device *pdev) > clk = NULL; > msm_host->bulk_clks[3].clk = clk; > > - clk = sdhci_msm_ice_get_clk(&pdev->dev); > - if (IS_ERR(clk)) > - clk = NULL; > - msm_host->bulk_clks[4].clk = clk; > - > ret = clk_bulk_prepare_enable(ARRAY_SIZE(msm_host->bulk_clks), > msm_host->bulk_clks); > if (ret) > @@ -2827,7 +2698,7 @@ static __maybe_unused int sdhci_msm_runtime_suspend(struct device *dev) > clk_bulk_disable_unprepare(ARRAY_SIZE(msm_host->bulk_clks), > msm_host->bulk_clks); > > - return 0; > + return sdhci_msm_ice_suspend(msm_host); > } > > static __maybe_unused int sdhci_msm_runtime_resume(struct device *dev) > -- > 2.34.1 >
