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ctrl.c
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ctrl.c
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// SPDX-License-Identifier: GPL-2.0+
/* * CAAM control-plane driver backend
* Controller-level driver, kernel property detection, initialization
*
* Copyright 2008-2012 Freescale Semiconductor, Inc.
* Copyright 2018-2019 NXP
*/
#include <linux/device.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/sys_soc.h>
#include <linux/fsl/mc.h>
#include "compat.h"
#include "regs.h"
#include "intern.h"
#include "jr.h"
#include "desc_constr.h"
#include "ctrl.h"
#include "sm.h"
bool caam_dpaa2;
EXPORT_SYMBOL(caam_dpaa2);
#ifdef CONFIG_CAAM_QI
#include "qi.h"
#endif
/*
* Descriptor to instantiate RNG State Handle 0 in normal mode and
* load the JDKEK, TDKEK and TDSK registers
*/
static void build_instantiation_desc(u32 *desc, int handle, int do_sk)
{
u32 *jump_cmd, op_flags;
init_job_desc(desc, 0);
op_flags = OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
(handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INIT |
OP_ALG_PR_ON;
/* INIT RNG in non-test mode */
append_operation(desc, op_flags);
if (!handle && do_sk) {
/*
* For SH0, Secure Keys must be generated as well
*/
/* wait for done */
jump_cmd = append_jump(desc, JUMP_CLASS_CLASS1);
set_jump_tgt_here(desc, jump_cmd);
/*
* load 1 to clear written reg:
* resets the done interrrupt and returns the RNG to idle.
*/
append_load_imm_u32(desc, 1, LDST_SRCDST_WORD_CLRW);
/* Initialize State Handle */
append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
OP_ALG_AAI_RNG4_SK);
}
append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT);
}
/* Descriptor for deinstantiation of State Handle 0 of the RNG block. */
static void build_deinstantiation_desc(u32 *desc, int handle)
{
init_job_desc(desc, 0);
/* Uninstantiate State Handle 0 */
append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
(handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INITFINAL);
append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT);
}
/*
* run_descriptor_deco0 - runs a descriptor on DECO0, under direct control of
* the software (no JR/QI used).
* @ctrldev - pointer to device
* @status - descriptor status, after being run
*
* Return: - 0 if no error occurred
* - -ENODEV if the DECO couldn't be acquired
* - -EAGAIN if an error occurred while executing the descriptor
*/
static inline int run_descriptor_deco0(struct device *ctrldev, u32 *desc,
u32 *status)
{
struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
struct caam_ctrl __iomem *ctrl = ctrlpriv->ctrl;
struct caam_deco __iomem *deco = ctrlpriv->deco;
unsigned int timeout = 100000;
u32 deco_dbg_reg, deco_state, flags;
int i;
if (ctrlpriv->virt_en == 1 ||
/*
* Apparently on i.MX8M{Q,M,N,P} it doesn't matter if virt_en == 1
* and the following steps should be performed regardless
*/
of_machine_is_compatible("fsl,imx8mq") ||
of_machine_is_compatible("fsl,imx8mm") ||
of_machine_is_compatible("fsl,imx8mn") ||
of_machine_is_compatible("fsl,imx8mp")) {
clrsetbits_32(&ctrl->deco_rsr, 0, DECORSR_JR0);
while (!(rd_reg32(&ctrl->deco_rsr) & DECORSR_VALID) &&
--timeout)
cpu_relax();
timeout = 100000;
}
clrsetbits_32(&ctrl->deco_rq, 0, DECORR_RQD0ENABLE);
while (!(rd_reg32(&ctrl->deco_rq) & DECORR_DEN0) &&
--timeout)
cpu_relax();
if (!timeout) {
dev_err(ctrldev, "failed to acquire DECO 0\n");
clrsetbits_32(&ctrl->deco_rq, DECORR_RQD0ENABLE, 0);
return -ENODEV;
}
for (i = 0; i < desc_len(desc); i++)
wr_reg32(&deco->descbuf[i], caam32_to_cpu(*(desc + i)));
flags = DECO_JQCR_WHL;
/*
* If the descriptor length is longer than 4 words, then the
* FOUR bit in JRCTRL register must be set.
*/
if (desc_len(desc) >= 4)
flags |= DECO_JQCR_FOUR;
/* Instruct the DECO to execute it */
clrsetbits_32(&deco->jr_ctl_hi, 0, flags);
timeout = 10000000;
do {
deco_dbg_reg = rd_reg32(&deco->desc_dbg);
if (ctrlpriv->era < 10)
deco_state = (deco_dbg_reg & DESC_DBG_DECO_STAT_MASK) >>
DESC_DBG_DECO_STAT_SHIFT;
else
deco_state = (rd_reg32(&deco->dbg_exec) &
DESC_DER_DECO_STAT_MASK) >>
DESC_DER_DECO_STAT_SHIFT;
/*
* If an error occured in the descriptor, then
* the DECO status field will be set to 0x0D
*/
if (deco_state == DECO_STAT_HOST_ERR)
break;
cpu_relax();
} while ((deco_dbg_reg & DESC_DBG_DECO_STAT_VALID) && --timeout);
*status = rd_reg32(&deco->op_status_hi) &
DECO_OP_STATUS_HI_ERR_MASK;
if (ctrlpriv->virt_en == 1)
clrsetbits_32(&ctrl->deco_rsr, DECORSR_JR0, 0);
/* Mark the DECO as free */
clrsetbits_32(&ctrl->deco_rq, DECORR_RQD0ENABLE, 0);
if (!timeout)
return -EAGAIN;
return 0;
}
/*
* deinstantiate_rng - builds and executes a descriptor on DECO0,
* which deinitializes the RNG block.
* @ctrldev - pointer to device
* @state_handle_mask - bitmask containing the instantiation status
* for the RNG4 state handles which exist in
* the RNG4 block: 1 if it's been instantiated
*
* Return: - 0 if no error occurred
* - -ENOMEM if there isn't enough memory to allocate the descriptor
* - -ENODEV if DECO0 couldn't be acquired
* - -EAGAIN if an error occurred when executing the descriptor
*/
static int deinstantiate_rng(struct device *ctrldev, int state_handle_mask)
{
u32 *desc, status;
int sh_idx, ret = 0;
desc = kmalloc(CAAM_CMD_SZ * 3, GFP_KERNEL | GFP_DMA);
if (!desc)
return -ENOMEM;
for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) {
/*
* If the corresponding bit is set, then it means the state
* handle was initialized by us, and thus it needs to be
* deinitialized as well
*/
if ((1 << sh_idx) & state_handle_mask) {
/*
* Create the descriptor for deinstantating this state
* handle
*/
build_deinstantiation_desc(desc, sh_idx);
/* Try to run it through DECO0 */
ret = run_descriptor_deco0(ctrldev, desc, &status);
if (ret ||
(status && status != JRSTA_SSRC_JUMP_HALT_CC)) {
dev_err(ctrldev,
"Failed to deinstantiate RNG4 SH%d\n",
sh_idx);
break;
}
dev_info(ctrldev, "Deinstantiated RNG4 SH%d\n", sh_idx);
}
}
kfree(desc);
return ret;
}
static void devm_deinstantiate_rng(void *data)
{
struct device *ctrldev = data;
struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
/*
* De-initialize RNG state handles initialized by this driver.
* In case of SoCs with Management Complex, RNG is managed by MC f/w.
*/
if (ctrlpriv->rng4_sh_init)
deinstantiate_rng(ctrldev, ctrlpriv->rng4_sh_init);
}
/*
* instantiate_rng - builds and executes a descriptor on DECO0,
* which initializes the RNG block.
* @ctrldev - pointer to device
* @state_handle_mask - bitmask containing the instantiation status
* for the RNG4 state handles which exist in
* the RNG4 block: 1 if it's been instantiated
* by an external entry, 0 otherwise.
* @gen_sk - generate data to be loaded into the JDKEK, TDKEK and TDSK;
* Caution: this can be done only once; if the keys need to be
* regenerated, a POR is required
*
* Return: - 0 if no error occurred
* - -ENOMEM if there isn't enough memory to allocate the descriptor
* - -ENODEV if DECO0 couldn't be acquired
* - -EAGAIN if an error occurred when executing the descriptor
* f.i. there was a RNG hardware error due to not "good enough"
* entropy being aquired.
*/
static int instantiate_rng(struct device *ctrldev, int state_handle_mask,
int gen_sk)
{
struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
struct caam_ctrl __iomem *ctrl;
u32 *desc, status = 0, rdsta_val;
int ret = 0, sh_idx;
ctrl = (struct caam_ctrl __iomem *)ctrlpriv->ctrl;
desc = kmalloc(CAAM_CMD_SZ * 7, GFP_KERNEL | GFP_DMA);
if (!desc)
return -ENOMEM;
for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) {
const u32 rdsta_if = RDSTA_IF0 << sh_idx;
const u32 rdsta_pr = RDSTA_PR0 << sh_idx;
const u32 rdsta_mask = rdsta_if | rdsta_pr;
/*
* If the corresponding bit is set, this state handle
* was initialized by somebody else, so it's left alone.
*/
if (rdsta_if & state_handle_mask) {
if (rdsta_pr & state_handle_mask)
continue;
dev_info(ctrldev,
"RNG4 SH%d was previously instantiated without prediction resistance. Tearing it down\n",
sh_idx);
ret = deinstantiate_rng(ctrldev, rdsta_if);
if (ret)
break;
}
/* Create the descriptor for instantiating RNG State Handle */
build_instantiation_desc(desc, sh_idx, gen_sk);
/* Try to run it through DECO0 */
ret = run_descriptor_deco0(ctrldev, desc, &status);
/*
* If ret is not 0, or descriptor status is not 0, then
* something went wrong. No need to try the next state
* handle (if available), bail out here.
* Also, if for some reason, the State Handle didn't get
* instantiated although the descriptor has finished
* without any error (HW optimizations for later
* CAAM eras), then try again.
*/
if (ret)
break;
rdsta_val = rd_reg32(&ctrl->r4tst[0].rdsta) & RDSTA_MASK;
if ((status && status != JRSTA_SSRC_JUMP_HALT_CC) ||
(rdsta_val & rdsta_mask) != rdsta_mask) {
ret = -EAGAIN;
break;
}
dev_info(ctrldev, "Instantiated RNG4 SH%d\n", sh_idx);
/* Clear the contents before recreating the descriptor */
memset(desc, 0x00, CAAM_CMD_SZ * 7);
}
kfree(desc);
if (!ret)
ret = devm_add_action_or_reset(ctrldev, devm_deinstantiate_rng,
ctrldev);
return ret;
}
/*
* kick_trng - sets the various parameters for enabling the initialization
* of the RNG4 block in CAAM
* @dev - pointer to the controller device
* @ent_delay - Defines the length (in system clocks) of each entropy sample.
*/
static void kick_trng(struct device *dev, int ent_delay)
{
struct caam_drv_private *ctrlpriv = dev_get_drvdata(dev);
struct caam_ctrl __iomem *ctrl;
struct rng4tst __iomem *r4tst;
u32 val;
ctrl = (struct caam_ctrl __iomem *)ctrlpriv->ctrl;
r4tst = &ctrl->r4tst[0];
/*
* Setting both RTMCTL:PRGM and RTMCTL:TRNG_ACC causes TRNG to
* properly invalidate the entropy in the entropy register and
* force re-generation.
*/
clrsetbits_32(&r4tst->rtmctl, 0, RTMCTL_PRGM | RTMCTL_ACC);
/*
* Performance-wise, it does not make sense to
* set the delay to a value that is lower
* than the last one that worked (i.e. the state handles
* were instantiated properly. Thus, instead of wasting
* time trying to set the values controlling the sample
* frequency, the function simply returns.
*/
val = (rd_reg32(&r4tst->rtsdctl) & RTSDCTL_ENT_DLY_MASK)
>> RTSDCTL_ENT_DLY_SHIFT;
if (ent_delay <= val)
goto start_rng;
val = (ent_delay << RTSDCTL_ENT_DLY_SHIFT) | 512;
wr_reg32(&r4tst->rtsdctl, val);
/* min. freq. count, equal to 1/4 of the entropy sample length */
wr_reg32(&r4tst->rtfrqmin, ent_delay >> 2);
/* max. freq. count, equal to 16 times the entropy sample length */
wr_reg32(&r4tst->rtfrqmax, ent_delay << 4);
wr_reg32(&r4tst->rtscmisc, (2 << 16) | 32);
wr_reg32(&r4tst->rtpkrrng, 570);
wr_reg32(&r4tst->rtpkrmax, 1600);
wr_reg32(&r4tst->rtscml, (122 << 16) | 317);
wr_reg32(&r4tst->rtscrl[0],(80 << 16) | 107);
wr_reg32(&r4tst->rtscrl[1],(57 << 16) | 62);
wr_reg32(&r4tst->rtscrl[2],(39 << 16) | 39);
wr_reg32(&r4tst->rtscrl[3],(27 << 16) | 26);
wr_reg32(&r4tst->rtscrl[4],(19 << 16) | 18);
wr_reg32(&r4tst->rtscrl[5],(18 << 16) | 17);
start_rng:
/*
* select raw sampling in both entropy shifter
* and statistical checker; ; put RNG4 into run mode
*/
clrsetbits_32(&r4tst->rtmctl, RTMCTL_PRGM | RTMCTL_ACC,
RTMCTL_SAMP_MODE_RAW_ES_SC);
}
static int caam_get_era_from_hw(struct caam_perfmon __iomem *perfmon)
{
static const struct {
u16 ip_id;
u8 maj_rev;
u8 era;
} id[] = {
{0x0A10, 1, 1},
{0x0A10, 2, 2},
{0x0A12, 1, 3},
{0x0A14, 1, 3},
{0x0A14, 2, 4},
{0x0A16, 1, 4},
{0x0A10, 3, 4},
{0x0A11, 1, 4},
{0x0A18, 1, 4},
{0x0A11, 2, 5},
{0x0A12, 2, 5},
{0x0A13, 1, 5},
{0x0A1C, 1, 5}
};
u32 ccbvid, id_ms;
u8 maj_rev, era;
u16 ip_id;
int i;
ccbvid = rd_reg32(&perfmon->ccb_id);
era = (ccbvid & CCBVID_ERA_MASK) >> CCBVID_ERA_SHIFT;
if (era) /* This is '0' prior to CAAM ERA-6 */
return era;
id_ms = rd_reg32(&perfmon->caam_id_ms);
ip_id = (id_ms & SECVID_MS_IPID_MASK) >> SECVID_MS_IPID_SHIFT;
maj_rev = (id_ms & SECVID_MS_MAJ_REV_MASK) >> SECVID_MS_MAJ_REV_SHIFT;
for (i = 0; i < ARRAY_SIZE(id); i++)
if (id[i].ip_id == ip_id && id[i].maj_rev == maj_rev)
return id[i].era;
return -ENOTSUPP;
}
/**
* caam_get_era() - Return the ERA of the SEC on SoC, based
* on "sec-era" optional property in the DTS. This property is updated
* by u-boot.
* In case this property is not passed an attempt to retrieve the CAAM
* era via register reads will be made.
**/
static int caam_get_era(struct caam_perfmon __iomem *perfmon)
{
struct device_node *caam_node;
int ret;
u32 prop;
caam_node = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0");
ret = of_property_read_u32(caam_node, "fsl,sec-era", &prop);
of_node_put(caam_node);
if (!ret)
return prop;
else
return caam_get_era_from_hw(perfmon);
}
/*
* ERRATA: imx6 devices (imx6D, imx6Q, imx6DL, imx6S, imx6DP and imx6QP)
* have an issue wherein AXI bus transactions may not occur in the correct
* order. This isn't a problem running single descriptors, but can be if
* running multiple concurrent descriptors. Reworking the driver to throttle
* to single requests is impractical, thus the workaround is to limit the AXI
* pipeline to a depth of 1 (from it's default of 4) to preclude this situation
* from occurring.
*/
static void handle_imx6_err005766(u32 *mcr)
{
if (of_machine_is_compatible("fsl,imx6q") ||
of_machine_is_compatible("fsl,imx6dl") ||
of_machine_is_compatible("fsl,imx6qp"))
clrsetbits_32(mcr, MCFGR_AXIPIPE_MASK,
1 << MCFGR_AXIPIPE_SHIFT);
}
static const struct of_device_id caam_match[] = {
{
.compatible = "fsl,sec-v4.0",
},
{
.compatible = "fsl,sec4.0",
},
{},
};
MODULE_DEVICE_TABLE(of, caam_match);
struct caam_imx_data {
const struct clk_bulk_data *clks;
int num_clks;
};
static const struct clk_bulk_data caam_imx6_clks[] = {
{ .id = "ipg" },
{ .id = "mem" },
{ .id = "aclk" },
{ .id = "emi_slow" },
};
static const struct caam_imx_data caam_imx6_data = {
.clks = caam_imx6_clks,
.num_clks = ARRAY_SIZE(caam_imx6_clks),
};
static const struct clk_bulk_data caam_imx7_clks[] = {
{ .id = "ipg" },
{ .id = "aclk" },
};
static const struct caam_imx_data caam_imx7_data = {
.clks = caam_imx7_clks,
.num_clks = ARRAY_SIZE(caam_imx7_clks),
};
static const struct clk_bulk_data caam_imx6ul_clks[] = {
{ .id = "ipg" },
{ .id = "mem" },
{ .id = "aclk" },
};
static const struct caam_imx_data caam_imx6ul_data = {
.clks = caam_imx6ul_clks,
.num_clks = ARRAY_SIZE(caam_imx6ul_clks),
};
static const struct soc_device_attribute caam_imx_soc_table[] = {
{ .soc_id = "i.MX6UL", .data = &caam_imx6ul_data },
{ .soc_id = "i.MX6*", .data = &caam_imx6_data },
{ .soc_id = "i.MX7*", .data = &caam_imx7_data },
{ .soc_id = "i.MX8M*", .data = &caam_imx7_data },
{ .family = "Freescale i.MX" },
{ /* sentinel */ }
};
static void disable_clocks(void *data)
{
struct caam_drv_private *ctrlpriv = data;
clk_bulk_disable_unprepare(ctrlpriv->num_clks, ctrlpriv->clks);
}
static int init_clocks(struct device *dev, const struct caam_imx_data *data)
{
struct caam_drv_private *ctrlpriv = dev_get_drvdata(dev);
int ret;
ctrlpriv->num_clks = data->num_clks;
ctrlpriv->clks = devm_kmemdup(dev, data->clks,
data->num_clks * sizeof(data->clks[0]),
GFP_KERNEL);
if (!ctrlpriv->clks)
return -ENOMEM;
ret = devm_clk_bulk_get(dev, ctrlpriv->num_clks, ctrlpriv->clks);
if (ret) {
dev_err(dev,
"Failed to request all necessary clocks\n");
return ret;
}
ret = clk_bulk_prepare_enable(ctrlpriv->num_clks, ctrlpriv->clks);
if (ret) {
dev_err(dev,
"Failed to prepare/enable all necessary clocks\n");
return ret;
}
return devm_add_action_or_reset(dev, disable_clocks, ctrlpriv);
}
#ifdef CONFIG_DEBUG_FS
static void caam_remove_debugfs(void *root)
{
debugfs_remove_recursive(root);
}
#endif
static void caam_dma_dev_unregister(void *data)
{
platform_device_unregister(data);
}
static int caam_ctrl_rng_init(struct device *dev)
{
struct caam_drv_private *ctrlpriv = dev_get_drvdata(dev);
struct caam_ctrl __iomem *ctrl = ctrlpriv->ctrl;
int ret, gen_sk, ent_delay = RTSDCTL_ENT_DLY_MIN;
u8 rng_vid;
if (ctrlpriv->era < 10) {
struct caam_perfmon __iomem *perfmon;
perfmon = ctrlpriv->total_jobrs ?
(struct caam_perfmon *)&ctrlpriv->jr[0]->perfmon :
(struct caam_perfmon *)&ctrl->perfmon;
rng_vid = (rd_reg32(&perfmon->cha_id_ls) &
CHA_ID_LS_RNG_MASK) >> CHA_ID_LS_RNG_SHIFT;
} else {
struct version_regs __iomem *vreg;
vreg = ctrlpriv->total_jobrs ?
(struct version_regs *)&ctrlpriv->jr[0]->vreg :
(struct version_regs *)&ctrl->vreg;
rng_vid = (rd_reg32(&vreg->rng) & CHA_VER_VID_MASK) >>
CHA_VER_VID_SHIFT;
}
/*
* If SEC has RNG version >= 4 and RNG state handle has not been
* already instantiated, do RNG instantiation
* In case of SoCs with Management Complex, RNG is managed by MC f/w.
*/
if (!(ctrlpriv->mc_en && ctrlpriv->pr_support) && rng_vid >= 4) {
ctrlpriv->rng4_sh_init =
rd_reg32(&ctrl->r4tst[0].rdsta);
/*
* If the secure keys (TDKEK, JDKEK, TDSK), were already
* generated, signal this to the function that is instantiating
* the state handles. An error would occur if RNG4 attempts
* to regenerate these keys before the next POR.
*/
gen_sk = ctrlpriv->rng4_sh_init & RDSTA_SKVN ? 0 : 1;
ctrlpriv->rng4_sh_init &= RDSTA_MASK;
do {
int inst_handles =
rd_reg32(&ctrl->r4tst[0].rdsta) &
RDSTA_MASK;
/*
* If either SH were instantiated by somebody else
* (e.g. u-boot) then it is assumed that the entropy
* parameters are properly set and thus the function
* setting these (kick_trng(...)) is skipped.
* Also, if a handle was instantiated, do not change
* the TRNG parameters.
*/
if (!(ctrlpriv->rng4_sh_init || inst_handles)) {
dev_info(dev,
"Entropy delay = %u\n",
ent_delay);
kick_trng(dev, ent_delay);
ent_delay += 400;
}
/*
* if instantiate_rng(...) fails, the loop will rerun
* and the kick_trng(...) function will modify the
* upper and lower limits of the entropy sampling
* interval, leading to a sucessful initialization of
* the RNG.
*/
ret = instantiate_rng(dev, inst_handles,
gen_sk);
if (ret == -EAGAIN)
/*
* if here, the loop will rerun,
* so don't hog the CPU
*/
cpu_relax();
} while ((ret == -EAGAIN) && (ent_delay < RTSDCTL_ENT_DLY_MAX));
if (ret) {
dev_err(dev, "failed to instantiate RNG");
return ret;
}
/*
* Set handles init'ed by this module as the complement of the
* already initialized ones
*/
ctrlpriv->rng4_sh_init = ~ctrlpriv->rng4_sh_init & RDSTA_MASK;
/* Enable RDB bit so that RNG works faster */
clrsetbits_32(&ctrl->scfgr, 0, SCFGR_RDBENABLE);
}
return 0;
}
#ifdef CONFIG_PM_SLEEP
/* Indicate if the internal state of the CAAM is lost during PM */
static int caam_off_during_pm(void)
{
bool not_off_during_pm = of_machine_is_compatible("fsl,imx6q") ||
of_machine_is_compatible("fsl,imx6qp") ||
of_machine_is_compatible("fsl,imx6dl");
return not_off_during_pm ? 0 : 1;
}
static void caam_state_save(struct device *dev)
{
struct caam_drv_private *ctrlpriv = dev_get_drvdata(dev);
struct caam_ctl_state *state = &ctrlpriv->state;
struct caam_ctrl __iomem *ctrl = ctrlpriv->ctrl;
u32 deco_inst, jr_inst;
int i;
state->mcr = rd_reg32(&ctrl->mcr);
state->scfgr = rd_reg32(&ctrl->scfgr);
deco_inst = (rd_reg32(&ctrl->perfmon.cha_num_ms) &
CHA_ID_MS_DECO_MASK) >> CHA_ID_MS_DECO_SHIFT;
for (i = 0; i < deco_inst; i++) {
state->deco_mid[i].liodn_ms =
rd_reg32(&ctrl->deco_mid[i].liodn_ms);
state->deco_mid[i].liodn_ls =
rd_reg32(&ctrl->deco_mid[i].liodn_ls);
}
jr_inst = (rd_reg32(&ctrl->perfmon.cha_num_ms) &
CHA_ID_MS_JR_MASK) >> CHA_ID_MS_JR_SHIFT;
for (i = 0; i < jr_inst; i++) {
state->jr_mid[i].liodn_ms =
rd_reg32(&ctrl->jr_mid[i].liodn_ms);
state->jr_mid[i].liodn_ls =
rd_reg32(&ctrl->jr_mid[i].liodn_ls);
}
}
static void caam_state_restore(const struct device *dev)
{
const struct caam_drv_private *ctrlpriv = dev_get_drvdata(dev);
const struct caam_ctl_state *state = &ctrlpriv->state;
struct caam_ctrl __iomem *ctrl = ctrlpriv->ctrl;
u32 deco_inst, jr_inst;
int i;
wr_reg32(&ctrl->mcr, state->mcr);
wr_reg32(&ctrl->scfgr, state->scfgr);
deco_inst = (rd_reg32(&ctrl->perfmon.cha_num_ms) &
CHA_ID_MS_DECO_MASK) >> CHA_ID_MS_DECO_SHIFT;
for (i = 0; i < deco_inst; i++) {
wr_reg32(&ctrl->deco_mid[i].liodn_ms,
state->deco_mid[i].liodn_ms);
wr_reg32(&ctrl->deco_mid[i].liodn_ls,
state->deco_mid[i].liodn_ls);
}
jr_inst = (rd_reg32(&ctrl->perfmon.cha_num_ms) &
CHA_ID_MS_JR_MASK) >> CHA_ID_MS_JR_SHIFT;
for (i = 0; i < ctrlpriv->total_jobrs; i++) {
wr_reg32(&ctrl->jr_mid[i].liodn_ms,
state->jr_mid[i].liodn_ms);
wr_reg32(&ctrl->jr_mid[i].liodn_ls,
state->jr_mid[i].liodn_ls);
}
if (ctrlpriv->virt_en == 1)
clrsetbits_32(&ctrl->jrstart, 0, JRSTART_JR0_START |
JRSTART_JR1_START | JRSTART_JR2_START |
JRSTART_JR3_START);
}
static int caam_ctrl_suspend(struct device *dev)
{
const struct caam_drv_private *ctrlpriv = dev_get_drvdata(dev);
if (ctrlpriv->caam_off_during_pm && !ctrlpriv->scu_en &&
!ctrlpriv->optee_en)
caam_state_save(dev);
return 0;
}
static int caam_ctrl_resume(struct device *dev)
{
struct caam_drv_private *ctrlpriv = dev_get_drvdata(dev);
int ret = 0;
if (ctrlpriv->caam_off_during_pm && !ctrlpriv->scu_en &&
!ctrlpriv->optee_en) {
caam_state_restore(dev);
/* HW and rng will be reset so deinstantiation can be removed */
devm_remove_action(dev, devm_deinstantiate_rng, dev);
ret = caam_ctrl_rng_init(dev);
}
return ret;
}
SIMPLE_DEV_PM_OPS(caam_ctrl_pm_ops, caam_ctrl_suspend, caam_ctrl_resume);
#endif /* CONFIG_PM_SLEEP */
#ifdef CONFIG_FSL_MC_BUS
static bool check_version(struct fsl_mc_version *mc_version, u32 major,
u32 minor, u32 revision)
{
if (mc_version->major > major)
return true;
if (mc_version->major == major) {
if (mc_version->minor > minor)
return true;
if (mc_version->minor == minor &&
mc_version->revision > revision)
return true;
}
return false;
}
#endif
/* Probe routine for CAAM top (controller) level */
static int caam_probe(struct platform_device *pdev)
{
int ret, ring;
u64 caam_id;
const struct soc_device_attribute *imx_soc_match;
static struct platform_device_info caam_dma_pdev_info = {
.name = "caam-dma",
.id = PLATFORM_DEVID_NONE
};
static struct platform_device *caam_dma_dev;
struct device *dev;
struct device_node *nprop, *np;
struct resource res_regs;
struct caam_ctrl __iomem *ctrl;
struct caam_drv_private *ctrlpriv;
struct caam_perfmon __iomem *perfmon;
#ifdef CONFIG_DEBUG_FS
struct dentry *dfs_root;
#endif
u32 scfgr, comp_params;
int pg_size;
int BLOCK_OFFSET = 0;
bool reg_access = true;
ctrlpriv = devm_kzalloc(&pdev->dev, sizeof(*ctrlpriv), GFP_KERNEL);
if (!ctrlpriv)
return -ENOMEM;
dev = &pdev->dev;
dev_set_drvdata(dev, ctrlpriv);
nprop = pdev->dev.of_node;
imx_soc_match = soc_device_match(caam_imx_soc_table);
caam_imx = (bool)imx_soc_match;
#ifdef CONFIG_PM_SLEEP
ctrlpriv->caam_off_during_pm = caam_imx && caam_off_during_pm();
#endif
if (imx_soc_match) {
np = of_find_compatible_node(NULL, NULL, "fsl,imx-scu");
ctrlpriv->scu_en = !!np;
of_node_put(np);
reg_access = !ctrlpriv->scu_en;
/*
* CAAM clocks cannot be controlled from kernel.
* They are automatically turned on by SCU f/w.
*/
if (ctrlpriv->scu_en)
goto iomap_ctrl;
/*
* Until Layerscape and i.MX OP-TEE get in sync,
* only i.MX OP-TEE use cases disallow access to
* caam page 0 (controller) registers.
*/
np = of_find_compatible_node(NULL, NULL, "linaro,optee-tz");
ctrlpriv->optee_en = !!np;
of_node_put(np);
reg_access = reg_access && !ctrlpriv->optee_en;
if (!imx_soc_match->data) {
dev_err(dev, "No clock data provided for i.MX SoC");
return -EINVAL;
}
ret = init_clocks(dev, imx_soc_match->data);
if (ret)
return ret;
}
iomap_ctrl:
/* Get configuration properties from device tree */
/* First, get register page */
ctrl = devm_of_iomap(dev, nprop, 0, NULL);
ret = PTR_ERR_OR_ZERO(ctrl);
if (ret) {
dev_err(dev, "caam: of_iomap() failed\n");
return ret;
}
ring = 0;
for_each_available_child_of_node(nprop, np)
if (of_device_is_compatible(np, "fsl,sec-v4.0-job-ring") ||
of_device_is_compatible(np, "fsl,sec4.0-job-ring")) {
u32 reg;
if (of_property_read_u32_index(np, "reg", 0, ®)) {
dev_err(dev, "%s read reg property error\n",
np->full_name);
continue;
}
ctrlpriv->jr[ring] = (struct caam_job_ring __iomem __force *)
((__force uint8_t *)ctrl + reg);
ctrlpriv->total_jobrs++;
ring++;
}
/*
* Wherever possible, instead of accessing registers from the global page,
* use the alias registers in the first (cf. DT nodes order)
* job ring's page.
*/
perfmon = ring ? (struct caam_perfmon *)&ctrlpriv->jr[0]->perfmon :
(struct caam_perfmon *)&ctrl->perfmon;
caam_little_end = !(bool)(rd_reg32(&perfmon->status) &
(CSTA_PLEND | CSTA_ALT_PLEND));
comp_params = rd_reg32(&perfmon->comp_parms_ms);
if (reg_access && comp_params & CTPR_MS_PS &&
rd_reg32(&ctrl->mcr) & MCFGR_LONG_PTR)
caam_ptr_sz = sizeof(u64);
else
caam_ptr_sz = sizeof(u32);
caam_dpaa2 = !!(comp_params & CTPR_MS_DPAA2);
ctrlpriv->qi_present = !!(comp_params & CTPR_MS_QI_MASK);
#ifdef CONFIG_CAAM_QI
/* If (DPAA 1.x) QI present, check whether dependencies are available */
if (ctrlpriv->qi_present && !caam_dpaa2) {
ret = qman_is_probed();
if (!ret) {
return -EPROBE_DEFER;
} else if (ret < 0) {
dev_err(dev, "failing probe due to qman probe error\n");
return -ENODEV;
}
ret = qman_portals_probed();
if (!ret) {
return -EPROBE_DEFER;
} else if (ret < 0) {
dev_err(dev, "failing probe due to qman portals probe error\n");
return -ENODEV;
}
}
#endif
/* Allocating the BLOCK_OFFSET based on the supported page size on
* the platform
*/
pg_size = (comp_params & CTPR_MS_PG_SZ_MASK) >> CTPR_MS_PG_SZ_SHIFT;
if (pg_size == 0)
BLOCK_OFFSET = PG_SIZE_4K;
else
BLOCK_OFFSET = PG_SIZE_64K;
ctrlpriv->ctrl = (struct caam_ctrl __iomem __force *)ctrl;
ctrlpriv->assure = (struct caam_assurance __iomem __force *)
((__force uint8_t *)ctrl +
BLOCK_OFFSET * ASSURE_BLOCK_NUMBER
);
ctrlpriv->deco = (struct caam_deco __iomem __force *)
((__force uint8_t *)ctrl +
BLOCK_OFFSET * DECO_BLOCK_NUMBER
);
np = of_find_compatible_node(NULL, NULL, "fsl,qoriq-mc");
ctrlpriv->mc_en = !!np;
of_node_put(np);
#ifdef CONFIG_FSL_MC_BUS
if (ctrlpriv->mc_en) {
struct fsl_mc_version *mc_version;
mc_version = fsl_mc_get_version();
if (mc_version)
ctrlpriv->pr_support = check_version(mc_version, 10, 20,
0);
else
return -EPROBE_DEFER;
}
#endif
/* Only i.MX SoCs have sm */
if (!imx_soc_match)