scsi: ufs-mediatek: Support performance mode for inline encryption engine
Some MediaTek UFS platforms support high-performance mode that inline encryption engine can be boosted while UFS is not clock-gated. The high-performance mode will be enabled if all below conditions are well-declaired in device tree, - Proper platform-specific compatible string which enables the host capability "UFS_MTK_CAP_BOOST_CRYPT_ENGINE". - "dvfsrc-vcore" node is available in this platform. - Required minimum vcore voltage for high-performance mode. - Clock mux and clock parents of inline encryption engine for both "low-power mode" and "high-performance mode". Link: https://lore.kernel.org/r/20200914050052.3974-2-stanley.chu@mediatek.com Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Stanley Chu
Martin K. Petersen
Родитель
3d1a99e2b5
Коммит
590b0d2372
|
|
@ -10,6 +10,7 @@
|
|||
#include <linux/bitfield.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/of_address.h>
|
||||
#include <linux/of_device.h>
|
||||
#include <linux/phy/phy.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/regulator/consumer.h>
|
||||
|
|
@ -44,6 +45,28 @@ static struct ufs_dev_fix ufs_mtk_dev_fixups[] = {
|
|||
END_FIX
|
||||
};
|
||||
|
||||
static const struct ufs_mtk_host_cfg ufs_mtk_mt8192_cfg = {
|
||||
.caps = UFS_MTK_CAP_BOOST_CRYPT_ENGINE,
|
||||
};
|
||||
|
||||
static const struct of_device_id ufs_mtk_of_match[] = {
|
||||
{
|
||||
.compatible = "mediatek,mt8183-ufshci",
|
||||
},
|
||||
{
|
||||
.compatible = "mediatek,mt8192-ufshci",
|
||||
.data = &ufs_mtk_mt8192_cfg
|
||||
},
|
||||
{},
|
||||
};
|
||||
|
||||
static bool ufs_mtk_is_boost_crypt_enabled(struct ufs_hba *hba)
|
||||
{
|
||||
struct ufs_mtk_host *host = ufshcd_get_variant(hba);
|
||||
|
||||
return (host->caps & UFS_MTK_CAP_BOOST_CRYPT_ENGINE);
|
||||
}
|
||||
|
||||
static void ufs_mtk_cfg_unipro_cg(struct ufs_hba *hba, bool enable)
|
||||
{
|
||||
u32 tmp;
|
||||
|
|
@ -294,6 +317,144 @@ static void ufs_mtk_mphy_power_on(struct ufs_hba *hba, bool on)
|
|||
host->mphy_powered_on = on;
|
||||
}
|
||||
|
||||
static int ufs_mtk_get_host_clk(struct device *dev, const char *name,
|
||||
struct clk **clk_out)
|
||||
{
|
||||
struct clk *clk;
|
||||
int err = 0;
|
||||
|
||||
clk = devm_clk_get(dev, name);
|
||||
if (IS_ERR(clk))
|
||||
err = PTR_ERR(clk);
|
||||
else
|
||||
*clk_out = clk;
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static void ufs_mtk_boost_crypt(struct ufs_hba *hba, bool boost)
|
||||
{
|
||||
struct ufs_mtk_host *host = ufshcd_get_variant(hba);
|
||||
struct ufs_mtk_crypt_cfg *cfg;
|
||||
struct regulator *reg;
|
||||
int volt, ret;
|
||||
|
||||
if (!ufs_mtk_is_boost_crypt_enabled(hba))
|
||||
return;
|
||||
|
||||
cfg = host->crypt;
|
||||
volt = cfg->vcore_volt;
|
||||
reg = cfg->reg_vcore;
|
||||
|
||||
ret = clk_prepare_enable(cfg->clk_crypt_mux);
|
||||
if (ret) {
|
||||
dev_info(hba->dev, "clk_prepare_enable(): %d\n",
|
||||
ret);
|
||||
return;
|
||||
}
|
||||
|
||||
if (boost) {
|
||||
ret = regulator_set_voltage(reg, volt, INT_MAX);
|
||||
if (ret) {
|
||||
dev_info(hba->dev,
|
||||
"failed to set vcore to %d\n", volt);
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = clk_set_parent(cfg->clk_crypt_mux,
|
||||
cfg->clk_crypt_perf);
|
||||
if (ret) {
|
||||
dev_info(hba->dev,
|
||||
"failed to set clk_crypt_perf\n");
|
||||
regulator_set_voltage(reg, 0, INT_MAX);
|
||||
goto out;
|
||||
}
|
||||
} else {
|
||||
ret = clk_set_parent(cfg->clk_crypt_mux,
|
||||
cfg->clk_crypt_lp);
|
||||
if (ret) {
|
||||
dev_info(hba->dev,
|
||||
"failed to set clk_crypt_lp\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = regulator_set_voltage(reg, 0, INT_MAX);
|
||||
if (ret) {
|
||||
dev_info(hba->dev,
|
||||
"failed to set vcore to MIN\n");
|
||||
}
|
||||
}
|
||||
out:
|
||||
clk_disable_unprepare(cfg->clk_crypt_mux);
|
||||
}
|
||||
|
||||
static int ufs_mtk_init_host_clk(struct ufs_hba *hba, const char *name,
|
||||
struct clk **clk)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = ufs_mtk_get_host_clk(hba->dev, name, clk);
|
||||
if (ret) {
|
||||
dev_info(hba->dev, "%s: failed to get %s: %d", __func__,
|
||||
name, ret);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void ufs_mtk_init_host_caps(struct ufs_hba *hba)
|
||||
{
|
||||
struct ufs_mtk_host *host = ufshcd_get_variant(hba);
|
||||
struct ufs_mtk_crypt_cfg *cfg;
|
||||
struct device *dev = hba->dev;
|
||||
struct regulator *reg;
|
||||
u32 volt;
|
||||
|
||||
host->caps = host->cfg->caps;
|
||||
|
||||
if (!ufs_mtk_is_boost_crypt_enabled(hba))
|
||||
return;
|
||||
|
||||
host->crypt = devm_kzalloc(dev, sizeof(*(host->crypt)),
|
||||
GFP_KERNEL);
|
||||
if (!host->crypt)
|
||||
goto disable_caps;
|
||||
|
||||
reg = devm_regulator_get_optional(dev, "dvfsrc-vcore");
|
||||
if (IS_ERR(reg)) {
|
||||
dev_info(dev, "failed to get dvfsrc-vcore: %ld",
|
||||
PTR_ERR(reg));
|
||||
goto disable_caps;
|
||||
}
|
||||
|
||||
if (of_property_read_u32(dev->of_node, "boost-crypt-vcore-min",
|
||||
&volt)) {
|
||||
dev_info(dev, "failed to get boost-crypt-vcore-min");
|
||||
goto disable_caps;
|
||||
}
|
||||
|
||||
cfg = host->crypt;
|
||||
if (ufs_mtk_init_host_clk(hba, "crypt_mux",
|
||||
&cfg->clk_crypt_mux))
|
||||
goto disable_caps;
|
||||
|
||||
if (ufs_mtk_init_host_clk(hba, "crypt_lp",
|
||||
&cfg->clk_crypt_lp))
|
||||
goto disable_caps;
|
||||
|
||||
if (ufs_mtk_init_host_clk(hba, "crypt_perf",
|
||||
&cfg->clk_crypt_perf))
|
||||
goto disable_caps;
|
||||
|
||||
cfg->reg_vcore = reg;
|
||||
cfg->vcore_volt = volt;
|
||||
dev_info(dev, "caps: boost-crypt");
|
||||
return;
|
||||
|
||||
disable_caps:
|
||||
host->caps &= ~UFS_MTK_CAP_BOOST_CRYPT_ENGINE;
|
||||
}
|
||||
|
||||
/**
|
||||
* ufs_mtk_setup_clocks - enables/disable clocks
|
||||
* @hba: host controller instance
|
||||
|
|
@ -336,12 +497,14 @@ static int ufs_mtk_setup_clocks(struct ufs_hba *hba, bool on,
|
|||
}
|
||||
|
||||
if (clk_pwr_off) {
|
||||
ufs_mtk_boost_crypt(hba, on);
|
||||
ufs_mtk_setup_ref_clk(hba, on);
|
||||
ufs_mtk_mphy_power_on(hba, on);
|
||||
}
|
||||
} else if (on && status == POST_CHANGE) {
|
||||
ufs_mtk_mphy_power_on(hba, on);
|
||||
ufs_mtk_setup_ref_clk(hba, on);
|
||||
ufs_mtk_boost_crypt(hba, on);
|
||||
}
|
||||
|
||||
return ret;
|
||||
|
|
@ -359,8 +522,9 @@ static int ufs_mtk_setup_clocks(struct ufs_hba *hba, bool on,
|
|||
*/
|
||||
static int ufs_mtk_init(struct ufs_hba *hba)
|
||||
{
|
||||
struct ufs_mtk_host *host;
|
||||
const struct of_device_id *id;
|
||||
struct device *dev = hba->dev;
|
||||
struct ufs_mtk_host *host;
|
||||
int err = 0;
|
||||
|
||||
host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
|
||||
|
|
@ -373,6 +537,18 @@ static int ufs_mtk_init(struct ufs_hba *hba)
|
|||
host->hba = hba;
|
||||
ufshcd_set_variant(hba, host);
|
||||
|
||||
/* Get host capability and platform data */
|
||||
id = of_match_device(ufs_mtk_of_match, dev);
|
||||
if (!id) {
|
||||
err = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (id->data) {
|
||||
host->cfg = (struct ufs_mtk_host_cfg *)id->data;
|
||||
ufs_mtk_init_host_caps(hba);
|
||||
}
|
||||
|
||||
err = ufs_mtk_bind_mphy(hba);
|
||||
if (err)
|
||||
goto out_variant_clear;
|
||||
|
|
@ -782,11 +958,6 @@ static int ufs_mtk_remove(struct platform_device *pdev)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id ufs_mtk_of_match[] = {
|
||||
{ .compatible = "mediatek,mt8183-ufshci"},
|
||||
{},
|
||||
};
|
||||
|
||||
static const struct dev_pm_ops ufs_mtk_pm_ops = {
|
||||
.suspend = ufshcd_pltfrm_suspend,
|
||||
.resume = ufshcd_pltfrm_resume,
|
||||
|
|
|
|||
|
|
@ -89,9 +89,31 @@ enum {
|
|||
TX_CLK_GATE_EN = 3,
|
||||
};
|
||||
|
||||
/*
|
||||
* Host capability
|
||||
*/
|
||||
enum ufs_mtk_host_caps {
|
||||
UFS_MTK_CAP_BOOST_CRYPT_ENGINE = 1 << 0,
|
||||
};
|
||||
|
||||
struct ufs_mtk_crypt_cfg {
|
||||
struct regulator *reg_vcore;
|
||||
struct clk *clk_crypt_perf;
|
||||
struct clk *clk_crypt_mux;
|
||||
struct clk *clk_crypt_lp;
|
||||
int vcore_volt;
|
||||
};
|
||||
|
||||
struct ufs_mtk_host_cfg {
|
||||
enum ufs_mtk_host_caps caps;
|
||||
};
|
||||
|
||||
struct ufs_mtk_host {
|
||||
struct ufs_hba *hba;
|
||||
struct phy *mphy;
|
||||
struct ufs_mtk_host_cfg *cfg;
|
||||
struct ufs_mtk_crypt_cfg *crypt;
|
||||
enum ufs_mtk_host_caps caps;
|
||||
struct reset_control *hci_reset;
|
||||
struct reset_control *unipro_reset;
|
||||
struct reset_control *crypto_reset;
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче