mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 22:15:40 +07:00
c6dc060906
Merge the crypto tree to resolve conflict between caam changes.
854 lines
24 KiB
C
854 lines
24 KiB
C
/* * CAAM control-plane driver backend
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* Controller-level driver, kernel property detection, initialization
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*
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* Copyright 2008-2012 Freescale Semiconductor, Inc.
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*/
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#include <linux/device.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include "compat.h"
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#include "regs.h"
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#include "intern.h"
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#include "jr.h"
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#include "desc_constr.h"
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#include "ctrl.h"
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bool caam_little_end;
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EXPORT_SYMBOL(caam_little_end);
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#ifdef CONFIG_CAAM_QI
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#include "qi.h"
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#endif
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/*
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* i.MX targets tend to have clock control subsystems that can
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* enable/disable clocking to our device.
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*/
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#ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX
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static inline struct clk *caam_drv_identify_clk(struct device *dev,
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char *clk_name)
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{
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return devm_clk_get(dev, clk_name);
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}
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#else
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static inline struct clk *caam_drv_identify_clk(struct device *dev,
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char *clk_name)
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{
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return NULL;
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}
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#endif
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/*
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* Descriptor to instantiate RNG State Handle 0 in normal mode and
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* load the JDKEK, TDKEK and TDSK registers
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*/
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static void build_instantiation_desc(u32 *desc, int handle, int do_sk)
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{
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u32 *jump_cmd, op_flags;
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init_job_desc(desc, 0);
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op_flags = OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
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(handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INIT;
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/* INIT RNG in non-test mode */
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append_operation(desc, op_flags);
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if (!handle && do_sk) {
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/*
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* For SH0, Secure Keys must be generated as well
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*/
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/* wait for done */
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jump_cmd = append_jump(desc, JUMP_CLASS_CLASS1);
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set_jump_tgt_here(desc, jump_cmd);
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/*
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* load 1 to clear written reg:
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* resets the done interrrupt and returns the RNG to idle.
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*/
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append_load_imm_u32(desc, 1, LDST_SRCDST_WORD_CLRW);
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/* Initialize State Handle */
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append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
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OP_ALG_AAI_RNG4_SK);
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}
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append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT);
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}
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/* Descriptor for deinstantiation of State Handle 0 of the RNG block. */
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static void build_deinstantiation_desc(u32 *desc, int handle)
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{
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init_job_desc(desc, 0);
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/* Uninstantiate State Handle 0 */
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append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
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(handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INITFINAL);
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append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT);
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}
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/*
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* run_descriptor_deco0 - runs a descriptor on DECO0, under direct control of
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* the software (no JR/QI used).
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* @ctrldev - pointer to device
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* @status - descriptor status, after being run
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*
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* Return: - 0 if no error occurred
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* - -ENODEV if the DECO couldn't be acquired
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* - -EAGAIN if an error occurred while executing the descriptor
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*/
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static inline int run_descriptor_deco0(struct device *ctrldev, u32 *desc,
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u32 *status)
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{
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struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
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struct caam_ctrl __iomem *ctrl = ctrlpriv->ctrl;
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struct caam_deco __iomem *deco = ctrlpriv->deco;
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unsigned int timeout = 100000;
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u32 deco_dbg_reg, flags;
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int i;
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if (ctrlpriv->virt_en == 1) {
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clrsetbits_32(&ctrl->deco_rsr, 0, DECORSR_JR0);
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while (!(rd_reg32(&ctrl->deco_rsr) & DECORSR_VALID) &&
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--timeout)
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cpu_relax();
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timeout = 100000;
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}
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clrsetbits_32(&ctrl->deco_rq, 0, DECORR_RQD0ENABLE);
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while (!(rd_reg32(&ctrl->deco_rq) & DECORR_DEN0) &&
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--timeout)
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cpu_relax();
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if (!timeout) {
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dev_err(ctrldev, "failed to acquire DECO 0\n");
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clrsetbits_32(&ctrl->deco_rq, DECORR_RQD0ENABLE, 0);
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return -ENODEV;
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}
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for (i = 0; i < desc_len(desc); i++)
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wr_reg32(&deco->descbuf[i], caam32_to_cpu(*(desc + i)));
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flags = DECO_JQCR_WHL;
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/*
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* If the descriptor length is longer than 4 words, then the
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* FOUR bit in JRCTRL register must be set.
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*/
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if (desc_len(desc) >= 4)
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flags |= DECO_JQCR_FOUR;
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/* Instruct the DECO to execute it */
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clrsetbits_32(&deco->jr_ctl_hi, 0, flags);
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timeout = 10000000;
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do {
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deco_dbg_reg = rd_reg32(&deco->desc_dbg);
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/*
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* If an error occured in the descriptor, then
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* the DECO status field will be set to 0x0D
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*/
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if ((deco_dbg_reg & DESC_DBG_DECO_STAT_MASK) ==
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DESC_DBG_DECO_STAT_HOST_ERR)
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break;
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cpu_relax();
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} while ((deco_dbg_reg & DESC_DBG_DECO_STAT_VALID) && --timeout);
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*status = rd_reg32(&deco->op_status_hi) &
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DECO_OP_STATUS_HI_ERR_MASK;
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if (ctrlpriv->virt_en == 1)
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clrsetbits_32(&ctrl->deco_rsr, DECORSR_JR0, 0);
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/* Mark the DECO as free */
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clrsetbits_32(&ctrl->deco_rq, DECORR_RQD0ENABLE, 0);
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if (!timeout)
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return -EAGAIN;
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return 0;
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}
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/*
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* instantiate_rng - builds and executes a descriptor on DECO0,
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* which initializes the RNG block.
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* @ctrldev - pointer to device
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* @state_handle_mask - bitmask containing the instantiation status
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* for the RNG4 state handles which exist in
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* the RNG4 block: 1 if it's been instantiated
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* by an external entry, 0 otherwise.
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* @gen_sk - generate data to be loaded into the JDKEK, TDKEK and TDSK;
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* Caution: this can be done only once; if the keys need to be
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* regenerated, a POR is required
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*
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* Return: - 0 if no error occurred
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* - -ENOMEM if there isn't enough memory to allocate the descriptor
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* - -ENODEV if DECO0 couldn't be acquired
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* - -EAGAIN if an error occurred when executing the descriptor
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* f.i. there was a RNG hardware error due to not "good enough"
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* entropy being aquired.
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*/
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static int instantiate_rng(struct device *ctrldev, int state_handle_mask,
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int gen_sk)
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{
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struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
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struct caam_ctrl __iomem *ctrl;
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u32 *desc, status = 0, rdsta_val;
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int ret = 0, sh_idx;
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ctrl = (struct caam_ctrl __iomem *)ctrlpriv->ctrl;
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desc = kmalloc(CAAM_CMD_SZ * 7, GFP_KERNEL);
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if (!desc)
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return -ENOMEM;
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for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) {
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/*
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* If the corresponding bit is set, this state handle
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* was initialized by somebody else, so it's left alone.
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*/
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if ((1 << sh_idx) & state_handle_mask)
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continue;
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/* Create the descriptor for instantiating RNG State Handle */
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build_instantiation_desc(desc, sh_idx, gen_sk);
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/* Try to run it through DECO0 */
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ret = run_descriptor_deco0(ctrldev, desc, &status);
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/*
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* If ret is not 0, or descriptor status is not 0, then
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* something went wrong. No need to try the next state
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* handle (if available), bail out here.
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* Also, if for some reason, the State Handle didn't get
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* instantiated although the descriptor has finished
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* without any error (HW optimizations for later
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* CAAM eras), then try again.
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*/
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rdsta_val = rd_reg32(&ctrl->r4tst[0].rdsta) & RDSTA_IFMASK;
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if ((status && status != JRSTA_SSRC_JUMP_HALT_CC) ||
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!(rdsta_val & (1 << sh_idx)))
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ret = -EAGAIN;
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if (ret)
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break;
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dev_info(ctrldev, "Instantiated RNG4 SH%d\n", sh_idx);
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/* Clear the contents before recreating the descriptor */
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memset(desc, 0x00, CAAM_CMD_SZ * 7);
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}
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kfree(desc);
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return ret;
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}
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/*
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* deinstantiate_rng - builds and executes a descriptor on DECO0,
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* which deinitializes the RNG block.
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* @ctrldev - pointer to device
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* @state_handle_mask - bitmask containing the instantiation status
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* for the RNG4 state handles which exist in
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* the RNG4 block: 1 if it's been instantiated
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*
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* Return: - 0 if no error occurred
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* - -ENOMEM if there isn't enough memory to allocate the descriptor
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* - -ENODEV if DECO0 couldn't be acquired
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* - -EAGAIN if an error occurred when executing the descriptor
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*/
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static int deinstantiate_rng(struct device *ctrldev, int state_handle_mask)
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{
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u32 *desc, status;
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int sh_idx, ret = 0;
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desc = kmalloc(CAAM_CMD_SZ * 3, GFP_KERNEL);
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if (!desc)
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return -ENOMEM;
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for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) {
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/*
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* If the corresponding bit is set, then it means the state
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* handle was initialized by us, and thus it needs to be
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* deinitialized as well
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*/
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if ((1 << sh_idx) & state_handle_mask) {
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/*
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* Create the descriptor for deinstantating this state
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* handle
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*/
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build_deinstantiation_desc(desc, sh_idx);
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/* Try to run it through DECO0 */
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ret = run_descriptor_deco0(ctrldev, desc, &status);
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if (ret ||
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(status && status != JRSTA_SSRC_JUMP_HALT_CC)) {
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dev_err(ctrldev,
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"Failed to deinstantiate RNG4 SH%d\n",
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sh_idx);
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break;
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}
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dev_info(ctrldev, "Deinstantiated RNG4 SH%d\n", sh_idx);
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}
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}
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kfree(desc);
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return ret;
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}
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static int caam_remove(struct platform_device *pdev)
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{
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struct device *ctrldev;
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struct caam_drv_private *ctrlpriv;
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struct caam_ctrl __iomem *ctrl;
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ctrldev = &pdev->dev;
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ctrlpriv = dev_get_drvdata(ctrldev);
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ctrl = (struct caam_ctrl __iomem *)ctrlpriv->ctrl;
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/* Remove platform devices under the crypto node */
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of_platform_depopulate(ctrldev);
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#ifdef CONFIG_CAAM_QI
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if (ctrlpriv->qidev)
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caam_qi_shutdown(ctrlpriv->qidev);
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#endif
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/* De-initialize RNG state handles initialized by this driver. */
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if (ctrlpriv->rng4_sh_init)
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deinstantiate_rng(ctrldev, ctrlpriv->rng4_sh_init);
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/* Shut down debug views */
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#ifdef CONFIG_DEBUG_FS
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debugfs_remove_recursive(ctrlpriv->dfs_root);
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#endif
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/* Unmap controller region */
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iounmap(ctrl);
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/* shut clocks off before finalizing shutdown */
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clk_disable_unprepare(ctrlpriv->caam_ipg);
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clk_disable_unprepare(ctrlpriv->caam_mem);
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clk_disable_unprepare(ctrlpriv->caam_aclk);
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if (ctrlpriv->caam_emi_slow)
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clk_disable_unprepare(ctrlpriv->caam_emi_slow);
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return 0;
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}
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/*
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* kick_trng - sets the various parameters for enabling the initialization
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* of the RNG4 block in CAAM
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* @pdev - pointer to the platform device
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* @ent_delay - Defines the length (in system clocks) of each entropy sample.
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*/
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static void kick_trng(struct platform_device *pdev, int ent_delay)
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{
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struct device *ctrldev = &pdev->dev;
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struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
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struct caam_ctrl __iomem *ctrl;
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struct rng4tst __iomem *r4tst;
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u32 val;
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ctrl = (struct caam_ctrl __iomem *)ctrlpriv->ctrl;
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r4tst = &ctrl->r4tst[0];
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/* put RNG4 into program mode */
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clrsetbits_32(&r4tst->rtmctl, 0, RTMCTL_PRGM);
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/*
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* Performance-wise, it does not make sense to
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* set the delay to a value that is lower
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* than the last one that worked (i.e. the state handles
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* were instantiated properly. Thus, instead of wasting
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* time trying to set the values controlling the sample
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* frequency, the function simply returns.
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*/
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val = (rd_reg32(&r4tst->rtsdctl) & RTSDCTL_ENT_DLY_MASK)
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>> RTSDCTL_ENT_DLY_SHIFT;
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if (ent_delay <= val)
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goto start_rng;
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val = rd_reg32(&r4tst->rtsdctl);
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val = (val & ~RTSDCTL_ENT_DLY_MASK) |
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(ent_delay << RTSDCTL_ENT_DLY_SHIFT);
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wr_reg32(&r4tst->rtsdctl, val);
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/* min. freq. count, equal to 1/4 of the entropy sample length */
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wr_reg32(&r4tst->rtfrqmin, ent_delay >> 2);
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/* disable maximum frequency count */
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wr_reg32(&r4tst->rtfrqmax, RTFRQMAX_DISABLE);
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/* read the control register */
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val = rd_reg32(&r4tst->rtmctl);
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start_rng:
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/*
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* select raw sampling in both entropy shifter
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* and statistical checker; ; put RNG4 into run mode
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*/
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clrsetbits_32(&r4tst->rtmctl, RTMCTL_PRGM, RTMCTL_SAMP_MODE_RAW_ES_SC);
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}
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/**
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* caam_get_era() - Return the ERA of the SEC on SoC, based
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* on "sec-era" propery in the DTS. This property is updated by u-boot.
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**/
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int caam_get_era(void)
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{
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struct device_node *caam_node;
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int ret;
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u32 prop;
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caam_node = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0");
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ret = of_property_read_u32(caam_node, "fsl,sec-era", &prop);
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of_node_put(caam_node);
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return ret ? -ENOTSUPP : prop;
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}
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EXPORT_SYMBOL(caam_get_era);
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static const struct of_device_id caam_match[] = {
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{
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.compatible = "fsl,sec-v4.0",
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},
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{
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.compatible = "fsl,sec4.0",
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, caam_match);
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/* Probe routine for CAAM top (controller) level */
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static int caam_probe(struct platform_device *pdev)
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{
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int ret, ring, gen_sk, ent_delay = RTSDCTL_ENT_DLY_MIN;
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u64 caam_id;
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struct device *dev;
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struct device_node *nprop, *np;
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struct caam_ctrl __iomem *ctrl;
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struct caam_drv_private *ctrlpriv;
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struct clk *clk;
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#ifdef CONFIG_DEBUG_FS
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struct caam_perfmon *perfmon;
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#endif
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u32 scfgr, comp_params;
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u32 cha_vid_ls;
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int pg_size;
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int BLOCK_OFFSET = 0;
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ctrlpriv = devm_kzalloc(&pdev->dev, sizeof(*ctrlpriv), GFP_KERNEL);
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if (!ctrlpriv)
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return -ENOMEM;
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dev = &pdev->dev;
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dev_set_drvdata(dev, ctrlpriv);
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ctrlpriv->pdev = pdev;
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nprop = pdev->dev.of_node;
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/* Enable clocking */
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clk = caam_drv_identify_clk(&pdev->dev, "ipg");
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if (IS_ERR(clk)) {
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ret = PTR_ERR(clk);
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dev_err(&pdev->dev,
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"can't identify CAAM ipg clk: %d\n", ret);
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return ret;
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}
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ctrlpriv->caam_ipg = clk;
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clk = caam_drv_identify_clk(&pdev->dev, "mem");
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if (IS_ERR(clk)) {
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ret = PTR_ERR(clk);
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dev_err(&pdev->dev,
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"can't identify CAAM mem clk: %d\n", ret);
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return ret;
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}
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ctrlpriv->caam_mem = clk;
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clk = caam_drv_identify_clk(&pdev->dev, "aclk");
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if (IS_ERR(clk)) {
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ret = PTR_ERR(clk);
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dev_err(&pdev->dev,
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"can't identify CAAM aclk clk: %d\n", ret);
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return ret;
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}
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ctrlpriv->caam_aclk = clk;
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if (!of_machine_is_compatible("fsl,imx6ul")) {
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clk = caam_drv_identify_clk(&pdev->dev, "emi_slow");
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if (IS_ERR(clk)) {
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ret = PTR_ERR(clk);
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dev_err(&pdev->dev,
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"can't identify CAAM emi_slow clk: %d\n", ret);
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return ret;
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}
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ctrlpriv->caam_emi_slow = clk;
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}
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ret = clk_prepare_enable(ctrlpriv->caam_ipg);
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if (ret < 0) {
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dev_err(&pdev->dev, "can't enable CAAM ipg clock: %d\n", ret);
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|
return ret;
|
|
}
|
|
|
|
ret = clk_prepare_enable(ctrlpriv->caam_mem);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "can't enable CAAM secure mem clock: %d\n",
|
|
ret);
|
|
goto disable_caam_ipg;
|
|
}
|
|
|
|
ret = clk_prepare_enable(ctrlpriv->caam_aclk);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "can't enable CAAM aclk clock: %d\n", ret);
|
|
goto disable_caam_mem;
|
|
}
|
|
|
|
if (ctrlpriv->caam_emi_slow) {
|
|
ret = clk_prepare_enable(ctrlpriv->caam_emi_slow);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "can't enable CAAM emi slow clock: %d\n",
|
|
ret);
|
|
goto disable_caam_aclk;
|
|
}
|
|
}
|
|
|
|
/* Get configuration properties from device tree */
|
|
/* First, get register page */
|
|
ctrl = of_iomap(nprop, 0);
|
|
if (ctrl == NULL) {
|
|
dev_err(dev, "caam: of_iomap() failed\n");
|
|
ret = -ENOMEM;
|
|
goto disable_caam_emi_slow;
|
|
}
|
|
|
|
caam_little_end = !(bool)(rd_reg32(&ctrl->perfmon.status) &
|
|
(CSTA_PLEND | CSTA_ALT_PLEND));
|
|
|
|
/* Finding the page size for using the CTPR_MS register */
|
|
comp_params = rd_reg32(&ctrl->perfmon.comp_parms_ms);
|
|
pg_size = (comp_params & CTPR_MS_PG_SZ_MASK) >> CTPR_MS_PG_SZ_SHIFT;
|
|
|
|
/* Allocating the BLOCK_OFFSET based on the supported page size on
|
|
* the platform
|
|
*/
|
|
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
|
|
);
|
|
|
|
/* Get the IRQ of the controller (for security violations only) */
|
|
ctrlpriv->secvio_irq = irq_of_parse_and_map(nprop, 0);
|
|
|
|
/*
|
|
* Enable DECO watchdogs and, if this is a PHYS_ADDR_T_64BIT kernel,
|
|
* long pointers in master configuration register
|
|
*/
|
|
clrsetbits_32(&ctrl->mcr, MCFGR_AWCACHE_MASK | MCFGR_LONG_PTR,
|
|
MCFGR_AWCACHE_CACH | MCFGR_AWCACHE_BUFF |
|
|
MCFGR_WDENABLE | MCFGR_LARGE_BURST |
|
|
(sizeof(dma_addr_t) == sizeof(u64) ? MCFGR_LONG_PTR : 0));
|
|
|
|
/*
|
|
* Read the Compile Time paramters and SCFGR to determine
|
|
* if Virtualization is enabled for this platform
|
|
*/
|
|
scfgr = rd_reg32(&ctrl->scfgr);
|
|
|
|
ctrlpriv->virt_en = 0;
|
|
if (comp_params & CTPR_MS_VIRT_EN_INCL) {
|
|
/* VIRT_EN_INCL = 1 & VIRT_EN_POR = 1 or
|
|
* VIRT_EN_INCL = 1 & VIRT_EN_POR = 0 & SCFGR_VIRT_EN = 1
|
|
*/
|
|
if ((comp_params & CTPR_MS_VIRT_EN_POR) ||
|
|
(!(comp_params & CTPR_MS_VIRT_EN_POR) &&
|
|
(scfgr & SCFGR_VIRT_EN)))
|
|
ctrlpriv->virt_en = 1;
|
|
} else {
|
|
/* VIRT_EN_INCL = 0 && VIRT_EN_POR_VALUE = 1 */
|
|
if (comp_params & CTPR_MS_VIRT_EN_POR)
|
|
ctrlpriv->virt_en = 1;
|
|
}
|
|
|
|
if (ctrlpriv->virt_en == 1)
|
|
clrsetbits_32(&ctrl->jrstart, 0, JRSTART_JR0_START |
|
|
JRSTART_JR1_START | JRSTART_JR2_START |
|
|
JRSTART_JR3_START);
|
|
|
|
if (sizeof(dma_addr_t) == sizeof(u64)) {
|
|
if (of_device_is_compatible(nprop, "fsl,sec-v5.0"))
|
|
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40));
|
|
else
|
|
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(36));
|
|
} else {
|
|
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
|
|
}
|
|
if (ret) {
|
|
dev_err(dev, "dma_set_mask_and_coherent failed (%d)\n", ret);
|
|
goto iounmap_ctrl;
|
|
}
|
|
|
|
ret = of_platform_populate(nprop, caam_match, NULL, dev);
|
|
if (ret) {
|
|
dev_err(dev, "JR platform devices creation error\n");
|
|
goto iounmap_ctrl;
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
/*
|
|
* FIXME: needs better naming distinction, as some amalgamation of
|
|
* "caam" and nprop->full_name. The OF name isn't distinctive,
|
|
* but does separate instances
|
|
*/
|
|
perfmon = (struct caam_perfmon __force *)&ctrl->perfmon;
|
|
|
|
ctrlpriv->dfs_root = debugfs_create_dir(dev_name(dev), NULL);
|
|
ctrlpriv->ctl = debugfs_create_dir("ctl", ctrlpriv->dfs_root);
|
|
#endif
|
|
|
|
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")) {
|
|
ctrlpriv->jr[ring] = (struct caam_job_ring __iomem __force *)
|
|
((__force uint8_t *)ctrl +
|
|
(ring + JR_BLOCK_NUMBER) *
|
|
BLOCK_OFFSET
|
|
);
|
|
ctrlpriv->total_jobrs++;
|
|
ring++;
|
|
}
|
|
|
|
/* Check to see if QI present. If so, enable */
|
|
ctrlpriv->qi_present =
|
|
!!(rd_reg32(&ctrl->perfmon.comp_parms_ms) &
|
|
CTPR_MS_QI_MASK);
|
|
if (ctrlpriv->qi_present) {
|
|
ctrlpriv->qi = (struct caam_queue_if __iomem __force *)
|
|
((__force uint8_t *)ctrl +
|
|
BLOCK_OFFSET * QI_BLOCK_NUMBER
|
|
);
|
|
/* This is all that's required to physically enable QI */
|
|
wr_reg32(&ctrlpriv->qi->qi_control_lo, QICTL_DQEN);
|
|
|
|
/* If QMAN driver is present, init CAAM-QI backend */
|
|
#ifdef CONFIG_CAAM_QI
|
|
ret = caam_qi_init(pdev);
|
|
if (ret)
|
|
dev_err(dev, "caam qi i/f init failed: %d\n", ret);
|
|
#endif
|
|
}
|
|
|
|
/* If no QI and no rings specified, quit and go home */
|
|
if ((!ctrlpriv->qi_present) && (!ctrlpriv->total_jobrs)) {
|
|
dev_err(dev, "no queues configured, terminating\n");
|
|
ret = -ENOMEM;
|
|
goto caam_remove;
|
|
}
|
|
|
|
cha_vid_ls = rd_reg32(&ctrl->perfmon.cha_id_ls);
|
|
|
|
/*
|
|
* If SEC has RNG version >= 4 and RNG state handle has not been
|
|
* already instantiated, do RNG instantiation
|
|
*/
|
|
if ((cha_vid_ls & CHA_ID_LS_RNG_MASK) >> CHA_ID_LS_RNG_SHIFT >= 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_IFMASK;
|
|
do {
|
|
int inst_handles =
|
|
rd_reg32(&ctrl->r4tst[0].rdsta) &
|
|
RDSTA_IFMASK;
|
|
/*
|
|
* 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(pdev, ent_delay);
|
|
ent_delay += 400;
|
|
}
|
|
/*
|
|
* if instantiate_rng(...) fails, the loop will rerun
|
|
* and the kick_trng(...) function will modfiy 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");
|
|
goto caam_remove;
|
|
}
|
|
/*
|
|
* Set handles init'ed by this module as the complement of the
|
|
* already initialized ones
|
|
*/
|
|
ctrlpriv->rng4_sh_init = ~ctrlpriv->rng4_sh_init & RDSTA_IFMASK;
|
|
|
|
/* Enable RDB bit so that RNG works faster */
|
|
clrsetbits_32(&ctrl->scfgr, 0, SCFGR_RDBENABLE);
|
|
}
|
|
|
|
/* NOTE: RTIC detection ought to go here, around Si time */
|
|
|
|
caam_id = (u64)rd_reg32(&ctrl->perfmon.caam_id_ms) << 32 |
|
|
(u64)rd_reg32(&ctrl->perfmon.caam_id_ls);
|
|
|
|
/* Report "alive" for developer to see */
|
|
dev_info(dev, "device ID = 0x%016llx (Era %d)\n", caam_id,
|
|
caam_get_era());
|
|
dev_info(dev, "job rings = %d, qi = %d\n",
|
|
ctrlpriv->total_jobrs, ctrlpriv->qi_present);
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
ctrlpriv->ctl_rq_dequeued =
|
|
debugfs_create_file("rq_dequeued",
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->req_dequeued,
|
|
&caam_fops_u64_ro);
|
|
ctrlpriv->ctl_ob_enc_req =
|
|
debugfs_create_file("ob_rq_encrypted",
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->ob_enc_req,
|
|
&caam_fops_u64_ro);
|
|
ctrlpriv->ctl_ib_dec_req =
|
|
debugfs_create_file("ib_rq_decrypted",
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->ib_dec_req,
|
|
&caam_fops_u64_ro);
|
|
ctrlpriv->ctl_ob_enc_bytes =
|
|
debugfs_create_file("ob_bytes_encrypted",
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->ob_enc_bytes,
|
|
&caam_fops_u64_ro);
|
|
ctrlpriv->ctl_ob_prot_bytes =
|
|
debugfs_create_file("ob_bytes_protected",
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->ob_prot_bytes,
|
|
&caam_fops_u64_ro);
|
|
ctrlpriv->ctl_ib_dec_bytes =
|
|
debugfs_create_file("ib_bytes_decrypted",
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->ib_dec_bytes,
|
|
&caam_fops_u64_ro);
|
|
ctrlpriv->ctl_ib_valid_bytes =
|
|
debugfs_create_file("ib_bytes_validated",
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->ib_valid_bytes,
|
|
&caam_fops_u64_ro);
|
|
|
|
/* Controller level - global status values */
|
|
ctrlpriv->ctl_faultaddr =
|
|
debugfs_create_file("fault_addr",
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->faultaddr,
|
|
&caam_fops_u32_ro);
|
|
ctrlpriv->ctl_faultdetail =
|
|
debugfs_create_file("fault_detail",
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->faultdetail,
|
|
&caam_fops_u32_ro);
|
|
ctrlpriv->ctl_faultstatus =
|
|
debugfs_create_file("fault_status",
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->status,
|
|
&caam_fops_u32_ro);
|
|
|
|
/* Internal covering keys (useful in non-secure mode only) */
|
|
ctrlpriv->ctl_kek_wrap.data = (__force void *)&ctrlpriv->ctrl->kek[0];
|
|
ctrlpriv->ctl_kek_wrap.size = KEK_KEY_SIZE * sizeof(u32);
|
|
ctrlpriv->ctl_kek = debugfs_create_blob("kek",
|
|
S_IRUSR |
|
|
S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl,
|
|
&ctrlpriv->ctl_kek_wrap);
|
|
|
|
ctrlpriv->ctl_tkek_wrap.data = (__force void *)&ctrlpriv->ctrl->tkek[0];
|
|
ctrlpriv->ctl_tkek_wrap.size = KEK_KEY_SIZE * sizeof(u32);
|
|
ctrlpriv->ctl_tkek = debugfs_create_blob("tkek",
|
|
S_IRUSR |
|
|
S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl,
|
|
&ctrlpriv->ctl_tkek_wrap);
|
|
|
|
ctrlpriv->ctl_tdsk_wrap.data = (__force void *)&ctrlpriv->ctrl->tdsk[0];
|
|
ctrlpriv->ctl_tdsk_wrap.size = KEK_KEY_SIZE * sizeof(u32);
|
|
ctrlpriv->ctl_tdsk = debugfs_create_blob("tdsk",
|
|
S_IRUSR |
|
|
S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl,
|
|
&ctrlpriv->ctl_tdsk_wrap);
|
|
#endif
|
|
return 0;
|
|
|
|
caam_remove:
|
|
#ifdef CONFIG_DEBUG_FS
|
|
debugfs_remove_recursive(ctrlpriv->dfs_root);
|
|
#endif
|
|
caam_remove(pdev);
|
|
return ret;
|
|
|
|
iounmap_ctrl:
|
|
iounmap(ctrl);
|
|
disable_caam_emi_slow:
|
|
if (ctrlpriv->caam_emi_slow)
|
|
clk_disable_unprepare(ctrlpriv->caam_emi_slow);
|
|
disable_caam_aclk:
|
|
clk_disable_unprepare(ctrlpriv->caam_aclk);
|
|
disable_caam_mem:
|
|
clk_disable_unprepare(ctrlpriv->caam_mem);
|
|
disable_caam_ipg:
|
|
clk_disable_unprepare(ctrlpriv->caam_ipg);
|
|
return ret;
|
|
}
|
|
|
|
static struct platform_driver caam_driver = {
|
|
.driver = {
|
|
.name = "caam",
|
|
.of_match_table = caam_match,
|
|
},
|
|
.probe = caam_probe,
|
|
.remove = caam_remove,
|
|
};
|
|
|
|
module_platform_driver(caam_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("FSL CAAM request backend");
|
|
MODULE_AUTHOR("Freescale Semiconductor - NMG/STC");
|