| Message ID | 20201112194011.103774-9-ebiggers@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | eMMC inline encryption support | expand |
On Thu, Nov 12, 2020 at 11:40:11AM -0800, Eric Biggers wrote: > diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig > index 31481c9fcc2ec..2ede2c86f173b 100644 > --- a/drivers/mmc/host/Kconfig > +++ b/drivers/mmc/host/Kconfig > @@ -544,6 +544,7 @@ config MMC_SDHCI_MSM > depends on MMC_SDHCI_PLTFM > select MMC_SDHCI_IO_ACCESSORS > select MMC_CQHCI > + select QCOM_SCM if MMC_CRYPTO > help > This selects the Secure Digital Host Controller Interface (SDHCI) > support present in Qualcomm SOCs. The controller supports The kernel test robot reported linkage errors caused by QCOM_SCM being selected without its dependency (ARM || ARM64). I'll probably fix this by doing: select QCOM_SCM if MMC_CRYPTO && ARCH_QCOM - Eric
On 12/11/20 9:40 pm, Eric Biggers wrote: > From: Eric Biggers <ebiggers@google.com> > > Add support for Qualcomm Inline Crypto Engine (ICE) to sdhci-msm. > > The standard-compliant parts, such as querying the crypto capabilities > and enabling crypto for individual MMC requests, are already handled by > cqhci-crypto.c, which itself is wired into the blk-crypto framework. > However, ICE requires vendor-specific init, enable, and resume logic, > and it requires that keys be programmed and evicted by vendor-specific > SMC calls. Make the sdhci-msm driver handle these details. > > This is heavily inspired by the similar changes made for UFS, since the > UFS and eMMC ICE instances are very similar. See commit df4ec2fa7a4d > ("scsi: ufs-qcom: Add Inline Crypto Engine support"). > > I tested this on a Sony Xperia 10, which uses the Snapdragon 630 SoC, > which has basic upstream support. Mainly, I used android-xfstests > (https://github.com/tytso/xfstests-bld/blob/master/Documentation/android-xfstests.md) > to run the ext4 and f2fs encryption tests in a Debian chroot: > > android-xfstests -c ext4,f2fs -g encrypt -m inlinecrypt > > These tests included tests which verify that the on-disk ciphertext is > identical to that produced by a software implementation. I also > verified that ICE was actually being used. > > Signed-off-by: Eric Biggers <ebiggers@google.com> Just 2 minor comments below > --- > drivers/mmc/host/Kconfig | 1 + > drivers/mmc/host/sdhci-msm.c | 270 ++++++++++++++++++++++++++++++++++- > 2 files changed, 267 insertions(+), 4 deletions(-) > > diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig > index 31481c9fcc2ec..2ede2c86f173b 100644 > --- a/drivers/mmc/host/Kconfig > +++ b/drivers/mmc/host/Kconfig > @@ -544,6 +544,7 @@ config MMC_SDHCI_MSM > depends on MMC_SDHCI_PLTFM > select MMC_SDHCI_IO_ACCESSORS > select MMC_CQHCI > + select QCOM_SCM 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 3451eb3255135..6ce21414d5104 100644 > --- a/drivers/mmc/host/sdhci-msm.c > +++ b/drivers/mmc/host/sdhci-msm.c > @@ -13,6 +13,7 @@ > #include <linux/pm_opp.h> > #include <linux/slab.h> > #include <linux/iopoll.h> > +#include <linux/qcom_scm.h> > #include <linux/regulator/consumer.h> > #include <linux/interconnect.h> > #include <linux/pinctrl/consumer.h> > @@ -256,10 +257,12 @@ 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*/ > - struct clk_bulk_data bulk_clks[4]; /* core, iface, cal, sleep clocks */ > + /* core, iface, cal, sleep, and ice clocks */ > + struct clk_bulk_data bulk_clks[5]; > unsigned long clk_rate; > struct mmc_host *mmc; > struct opp_table *opp_table; > @@ -1785,6 +1788,240 @@ static void sdhci_msm_set_clock(struct sdhci_host *host, unsigned int clock) > __sdhci_msm_set_clock(host, clock); > } > > +/*****************************************************************************\ > + * * > + * Inline Crypto Engine (ICE) support * > + * * > +\*****************************************************************************/ > + > +#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; > + int err; > + > + 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; > + } > + > + msm_host->ice_mem = devm_ioremap_resource(dev, res); > + if (IS_ERR(msm_host->ice_mem)) { > + err = PTR_ERR(msm_host->ice_mem); > + dev_err(dev, "Failed to map ICE registers; err=%d\n", err); > + return err; > + } > + > + if (!sdhci_msm_ice_supported(msm_host)) > + goto disable; > + > + 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) > +{ > + 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); > +} > + > +/* Poll until all BIST (built-in self test) bits are reset */ > +static int sdhci_msm_ice_wait_bist_status(struct sdhci_msm_host *msm_host) > +{ > + int count; > + u32 reg; > + > + for (count = 0; count < 100; count++) { > + reg = sdhci_msm_ice_readl(msm_host, QCOM_ICE_REG_BIST_STATUS); > + if (!(reg & QCOM_ICE_BIST_STATUS_MASK)) > + break; > + udelay(50); usleep_range ? Also could use read_poll_timeout() here > + } > + if (reg) { > + dev_err(mmc_dev(msm_host->mmc), > + "Timed out waiting for ICE self-test to complete\n"); > + return -ETIMEDOUT; > + } > + return 0; > +} > + > +static void sdhci_msm_ice_enable(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); > +} > + > +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); > +} > + > +/* > + * Program a key into a QC ICE keyslot, or evict a keyslot. QC ICE requires > + * vendor-specific SCM calls for this; it doesn't support the standard way. > + */ > +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); > + 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); > + 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; > +} > +#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) > +{ > + return 0; > +} > + > +static inline void sdhci_msm_ice_enable(struct sdhci_msm_host *msm_host) > +{ > +} > + > +static inline int __maybe_unused > +sdhci_msm_ice_resume(struct sdhci_msm_host *msm_host) > +{ > + return 0; > +} > +#endif /* !CONFIG_MMC_CRYPTO */ > + > /*****************************************************************************\ > * * > * MSM Command Queue Engine (CQE) * > @@ -1803,6 +2040,16 @@ static u32 sdhci_msm_cqe_irq(struct sdhci_host *host, u32 intmask) > return 0; > } > > +static void sdhci_msm_cqe_enable(struct mmc_host *mmc) > +{ > + struct sdhci_host *host = mmc_priv(mmc); > + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); > + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); > + > + sdhci_cqe_enable(mmc); > + sdhci_msm_ice_enable(msm_host); > +} > + > static void sdhci_msm_cqe_disable(struct mmc_host *mmc, bool recovery) > { > struct sdhci_host *host = mmc_priv(mmc); > @@ -1835,8 +2082,11 @@ static void sdhci_msm_cqe_disable(struct mmc_host *mmc, bool recovery) > } > > static const struct cqhci_host_ops sdhci_msm_cqhci_ops = { > - .enable = sdhci_cqe_enable, > + .enable = sdhci_msm_cqe_enable, > .disable = sdhci_msm_cqe_disable, > +#ifdef CONFIG_MMC_CRYPTO > + .program_key = sdhci_msm_program_key, > +#endif > }; > > static int sdhci_msm_cqe_add_host(struct sdhci_host *host, > @@ -1872,6 +2122,10 @@ static int sdhci_msm_cqe_add_host(struct sdhci_host *host, > > dma64 = host->flags & SDHCI_USE_64_BIT_DMA; > > + ret = sdhci_msm_ice_init(msm_host, cq_host); > + if (ret) > + goto cleanup; > + > ret = cqhci_init(cq_host, host->mmc, dma64); > if (ret) { > dev_err(&pdev->dev, "%s: CQE init: failed (%d)\n", > @@ -2321,6 +2575,11 @@ 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) > @@ -2531,12 +2790,15 @@ static __maybe_unused int sdhci_msm_runtime_resume(struct device *dev) > * Whenever core-clock is gated dynamically, it's needed to > * restore the SDR DLL settings when the clock is ungated. > */ > - if (msm_host->restore_dll_config && msm_host->clk_rate) > + if (msm_host->restore_dll_config && msm_host->clk_rate) { > ret = sdhci_msm_restore_sdr_dll_config(host); > + if (ret) > + return ret; > + } > > dev_pm_opp_set_rate(dev, msm_host->clk_rate); > > - return ret; > + return sdhci_msm_ice_resume(msm_host); > } > > static const struct dev_pm_ops sdhci_msm_pm_ops = { >
On Wed, Dec 02, 2020 at 03:56:21PM +0200, Adrian Hunter wrote: > > +/* Poll until all BIST (built-in self test) bits are reset */ > > +static int sdhci_msm_ice_wait_bist_status(struct sdhci_msm_host *msm_host) > > +{ > > + int count; > > + u32 reg; > > + > > + for (count = 0; count < 100; count++) { > > + reg = sdhci_msm_ice_readl(msm_host, QCOM_ICE_REG_BIST_STATUS); > > + if (!(reg & QCOM_ICE_BIST_STATUS_MASK)) > > + break; > > + udelay(50); > > usleep_range ? > > Also could use read_poll_timeout() here > I'll change it to use readl_poll_timeout(). - Eric
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 31481c9fcc2ec..2ede2c86f173b 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -544,6 +544,7 @@ config MMC_SDHCI_MSM depends on MMC_SDHCI_PLTFM select MMC_SDHCI_IO_ACCESSORS select MMC_CQHCI + select QCOM_SCM 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 3451eb3255135..6ce21414d5104 100644 --- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -13,6 +13,7 @@ #include <linux/pm_opp.h> #include <linux/slab.h> #include <linux/iopoll.h> +#include <linux/qcom_scm.h> #include <linux/regulator/consumer.h> #include <linux/interconnect.h> #include <linux/pinctrl/consumer.h> @@ -256,10 +257,12 @@ 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*/ - struct clk_bulk_data bulk_clks[4]; /* core, iface, cal, sleep clocks */ + /* core, iface, cal, sleep, and ice clocks */ + struct clk_bulk_data bulk_clks[5]; unsigned long clk_rate; struct mmc_host *mmc; struct opp_table *opp_table; @@ -1785,6 +1788,240 @@ static void sdhci_msm_set_clock(struct sdhci_host *host, unsigned int clock) __sdhci_msm_set_clock(host, clock); } +/*****************************************************************************\ + * * + * Inline Crypto Engine (ICE) support * + * * +\*****************************************************************************/ + +#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; + int err; + + 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; + } + + msm_host->ice_mem = devm_ioremap_resource(dev, res); + if (IS_ERR(msm_host->ice_mem)) { + err = PTR_ERR(msm_host->ice_mem); + dev_err(dev, "Failed to map ICE registers; err=%d\n", err); + return err; + } + + if (!sdhci_msm_ice_supported(msm_host)) + goto disable; + + 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) +{ + 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); +} + +/* Poll until all BIST (built-in self test) bits are reset */ +static int sdhci_msm_ice_wait_bist_status(struct sdhci_msm_host *msm_host) +{ + int count; + u32 reg; + + for (count = 0; count < 100; count++) { + reg = sdhci_msm_ice_readl(msm_host, QCOM_ICE_REG_BIST_STATUS); + if (!(reg & QCOM_ICE_BIST_STATUS_MASK)) + break; + udelay(50); + } + if (reg) { + dev_err(mmc_dev(msm_host->mmc), + "Timed out waiting for ICE self-test to complete\n"); + return -ETIMEDOUT; + } + return 0; +} + +static void sdhci_msm_ice_enable(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); +} + +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); +} + +/* + * Program a key into a QC ICE keyslot, or evict a keyslot. QC ICE requires + * vendor-specific SCM calls for this; it doesn't support the standard way. + */ +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); + 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); + 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; +} +#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) +{ + return 0; +} + +static inline void sdhci_msm_ice_enable(struct sdhci_msm_host *msm_host) +{ +} + +static inline int __maybe_unused +sdhci_msm_ice_resume(struct sdhci_msm_host *msm_host) +{ + return 0; +} +#endif /* !CONFIG_MMC_CRYPTO */ + /*****************************************************************************\ * * * MSM Command Queue Engine (CQE) * @@ -1803,6 +2040,16 @@ static u32 sdhci_msm_cqe_irq(struct sdhci_host *host, u32 intmask) return 0; } +static void sdhci_msm_cqe_enable(struct mmc_host *mmc) +{ + struct sdhci_host *host = mmc_priv(mmc); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + + sdhci_cqe_enable(mmc); + sdhci_msm_ice_enable(msm_host); +} + static void sdhci_msm_cqe_disable(struct mmc_host *mmc, bool recovery) { struct sdhci_host *host = mmc_priv(mmc); @@ -1835,8 +2082,11 @@ static void sdhci_msm_cqe_disable(struct mmc_host *mmc, bool recovery) } static const struct cqhci_host_ops sdhci_msm_cqhci_ops = { - .enable = sdhci_cqe_enable, + .enable = sdhci_msm_cqe_enable, .disable = sdhci_msm_cqe_disable, +#ifdef CONFIG_MMC_CRYPTO + .program_key = sdhci_msm_program_key, +#endif }; static int sdhci_msm_cqe_add_host(struct sdhci_host *host, @@ -1872,6 +2122,10 @@ static int sdhci_msm_cqe_add_host(struct sdhci_host *host, dma64 = host->flags & SDHCI_USE_64_BIT_DMA; + ret = sdhci_msm_ice_init(msm_host, cq_host); + if (ret) + goto cleanup; + ret = cqhci_init(cq_host, host->mmc, dma64); if (ret) { dev_err(&pdev->dev, "%s: CQE init: failed (%d)\n", @@ -2321,6 +2575,11 @@ 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) @@ -2531,12 +2790,15 @@ static __maybe_unused int sdhci_msm_runtime_resume(struct device *dev) * Whenever core-clock is gated dynamically, it's needed to * restore the SDR DLL settings when the clock is ungated. */ - if (msm_host->restore_dll_config && msm_host->clk_rate) + if (msm_host->restore_dll_config && msm_host->clk_rate) { ret = sdhci_msm_restore_sdr_dll_config(host); + if (ret) + return ret; + } dev_pm_opp_set_rate(dev, msm_host->clk_rate); - return ret; + return sdhci_msm_ice_resume(msm_host); } static const struct dev_pm_ops sdhci_msm_pm_ops = {