1 // SPDX-License-Identifier: GPL-2.0+
2 /* * CAAM control-plane driver backend
3 * Controller-level driver, kernel property detection, initialization
5 * Copyright 2008-2012 Freescale Semiconductor, Inc.
6 * Copyright 2018-2019 NXP
9 #include <linux/device.h>
10 #include <linux/of_address.h>
11 #include <linux/of_irq.h>
12 #include <linux/sys_soc.h>
13 #include <linux/fsl/mc.h>
20 #include "desc_constr.h"
24 EXPORT_SYMBOL(caam_dpaa2);
31 * Descriptor to instantiate RNG State Handle 0 in normal mode and
32 * load the JDKEK, TDKEK and TDSK registers
34 static void build_instantiation_desc(u32 *desc, int handle, int do_sk)
36 u32 *jump_cmd, op_flags;
38 init_job_desc(desc, 0);
40 op_flags = OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
41 (handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INIT |
44 /* INIT RNG in non-test mode */
45 append_operation(desc, op_flags);
47 if (!handle && do_sk) {
49 * For SH0, Secure Keys must be generated as well
53 jump_cmd = append_jump(desc, JUMP_CLASS_CLASS1);
54 set_jump_tgt_here(desc, jump_cmd);
57 * load 1 to clear written reg:
58 * resets the done interrupt and returns the RNG to idle.
60 append_load_imm_u32(desc, 1, LDST_SRCDST_WORD_CLRW);
62 /* Initialize State Handle */
63 append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
67 append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT);
70 /* Descriptor for deinstantiation of State Handle 0 of the RNG block. */
71 static void build_deinstantiation_desc(u32 *desc, int handle)
73 init_job_desc(desc, 0);
75 /* Uninstantiate State Handle 0 */
76 append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
77 (handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INITFINAL);
79 append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT);
83 * run_descriptor_deco0 - runs a descriptor on DECO0, under direct control of
84 * the software (no JR/QI used).
85 * @ctrldev - pointer to device
86 * @status - descriptor status, after being run
88 * Return: - 0 if no error occurred
89 * - -ENODEV if the DECO couldn't be acquired
90 * - -EAGAIN if an error occurred while executing the descriptor
92 static inline int run_descriptor_deco0(struct device *ctrldev, u32 *desc,
95 struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
96 struct caam_ctrl __iomem *ctrl = ctrlpriv->ctrl;
97 struct caam_deco __iomem *deco = ctrlpriv->deco;
98 unsigned int timeout = 100000;
99 u32 deco_dbg_reg, deco_state, flags;
103 if (ctrlpriv->virt_en == 1 ||
105 * Apparently on i.MX8M{Q,M,N,P} it doesn't matter if virt_en == 1
106 * and the following steps should be performed regardless
108 of_machine_is_compatible("fsl,imx8mq") ||
109 of_machine_is_compatible("fsl,imx8mm") ||
110 of_machine_is_compatible("fsl,imx8mn") ||
111 of_machine_is_compatible("fsl,imx8mp")) {
112 clrsetbits_32(&ctrl->deco_rsr, 0, DECORSR_JR0);
114 while (!(rd_reg32(&ctrl->deco_rsr) & DECORSR_VALID) &&
121 clrsetbits_32(&ctrl->deco_rq, 0, DECORR_RQD0ENABLE);
123 while (!(rd_reg32(&ctrl->deco_rq) & DECORR_DEN0) &&
128 dev_err(ctrldev, "failed to acquire DECO 0\n");
129 clrsetbits_32(&ctrl->deco_rq, DECORR_RQD0ENABLE, 0);
133 for (i = 0; i < desc_len(desc); i++)
134 wr_reg32(&deco->descbuf[i], caam32_to_cpu(*(desc + i)));
136 flags = DECO_JQCR_WHL;
138 * If the descriptor length is longer than 4 words, then the
139 * FOUR bit in JRCTRL register must be set.
141 if (desc_len(desc) >= 4)
142 flags |= DECO_JQCR_FOUR;
144 /* Instruct the DECO to execute it */
145 clrsetbits_32(&deco->jr_ctl_hi, 0, flags);
149 deco_dbg_reg = rd_reg32(&deco->desc_dbg);
151 if (ctrlpriv->era < 10)
152 deco_state = (deco_dbg_reg & DESC_DBG_DECO_STAT_MASK) >>
153 DESC_DBG_DECO_STAT_SHIFT;
155 deco_state = (rd_reg32(&deco->dbg_exec) &
156 DESC_DER_DECO_STAT_MASK) >>
157 DESC_DER_DECO_STAT_SHIFT;
160 * If an error occurred in the descriptor, then
161 * the DECO status field will be set to 0x0D
163 if (deco_state == DECO_STAT_HOST_ERR)
167 } while ((deco_dbg_reg & DESC_DBG_DECO_STAT_VALID) && --timeout);
169 *status = rd_reg32(&deco->op_status_hi) &
170 DECO_OP_STATUS_HI_ERR_MASK;
172 if (ctrlpriv->virt_en == 1)
173 clrsetbits_32(&ctrl->deco_rsr, DECORSR_JR0, 0);
175 /* Mark the DECO as free */
176 clrsetbits_32(&ctrl->deco_rq, DECORR_RQD0ENABLE, 0);
185 * deinstantiate_rng - builds and executes a descriptor on DECO0,
186 * which deinitializes the RNG block.
187 * @ctrldev - pointer to device
188 * @state_handle_mask - bitmask containing the instantiation status
189 * for the RNG4 state handles which exist in
190 * the RNG4 block: 1 if it's been instantiated
192 * Return: - 0 if no error occurred
193 * - -ENOMEM if there isn't enough memory to allocate the descriptor
194 * - -ENODEV if DECO0 couldn't be acquired
195 * - -EAGAIN if an error occurred when executing the descriptor
197 static int deinstantiate_rng(struct device *ctrldev, int state_handle_mask)
202 desc = kmalloc(CAAM_CMD_SZ * 3, GFP_KERNEL | GFP_DMA);
206 for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) {
208 * If the corresponding bit is set, then it means the state
209 * handle was initialized by us, and thus it needs to be
210 * deinitialized as well
212 if ((1 << sh_idx) & state_handle_mask) {
214 * Create the descriptor for deinstantating this state
217 build_deinstantiation_desc(desc, sh_idx);
219 /* Try to run it through DECO0 */
220 ret = run_descriptor_deco0(ctrldev, desc, &status);
223 (status && status != JRSTA_SSRC_JUMP_HALT_CC)) {
225 "Failed to deinstantiate RNG4 SH%d\n",
229 dev_info(ctrldev, "Deinstantiated RNG4 SH%d\n", sh_idx);
238 static void devm_deinstantiate_rng(void *data)
240 struct device *ctrldev = data;
241 struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
244 * De-initialize RNG state handles initialized by this driver.
245 * In case of SoCs with Management Complex, RNG is managed by MC f/w.
247 if (ctrlpriv->rng4_sh_init)
248 deinstantiate_rng(ctrldev, ctrlpriv->rng4_sh_init);
252 * instantiate_rng - builds and executes a descriptor on DECO0,
253 * which initializes the RNG block.
254 * @ctrldev - pointer to device
255 * @state_handle_mask - bitmask containing the instantiation status
256 * for the RNG4 state handles which exist in
257 * the RNG4 block: 1 if it's been instantiated
258 * by an external entry, 0 otherwise.
259 * @gen_sk - generate data to be loaded into the JDKEK, TDKEK and TDSK;
260 * Caution: this can be done only once; if the keys need to be
261 * regenerated, a POR is required
263 * Return: - 0 if no error occurred
264 * - -ENOMEM if there isn't enough memory to allocate the descriptor
265 * - -ENODEV if DECO0 couldn't be acquired
266 * - -EAGAIN if an error occurred when executing the descriptor
267 * f.i. there was a RNG hardware error due to not "good enough"
268 * entropy being acquired.
270 static int instantiate_rng(struct device *ctrldev, int state_handle_mask,
273 struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
274 struct caam_ctrl __iomem *ctrl;
275 u32 *desc, status = 0, rdsta_val;
278 ctrl = (struct caam_ctrl __iomem *)ctrlpriv->ctrl;
279 desc = kmalloc(CAAM_CMD_SZ * 7, GFP_KERNEL | GFP_DMA);
283 for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) {
284 const u32 rdsta_if = RDSTA_IF0 << sh_idx;
285 const u32 rdsta_pr = RDSTA_PR0 << sh_idx;
286 const u32 rdsta_mask = rdsta_if | rdsta_pr;
288 /* Clear the contents before using the descriptor */
289 memset(desc, 0x00, CAAM_CMD_SZ * 7);
292 * If the corresponding bit is set, this state handle
293 * was initialized by somebody else, so it's left alone.
295 if (rdsta_if & state_handle_mask) {
296 if (rdsta_pr & state_handle_mask)
300 "RNG4 SH%d was previously instantiated without prediction resistance. Tearing it down\n",
303 ret = deinstantiate_rng(ctrldev, rdsta_if);
308 /* Create the descriptor for instantiating RNG State Handle */
309 build_instantiation_desc(desc, sh_idx, gen_sk);
311 /* Try to run it through DECO0 */
312 ret = run_descriptor_deco0(ctrldev, desc, &status);
315 * If ret is not 0, or descriptor status is not 0, then
316 * something went wrong. No need to try the next state
317 * handle (if available), bail out here.
318 * Also, if for some reason, the State Handle didn't get
319 * instantiated although the descriptor has finished
320 * without any error (HW optimizations for later
321 * CAAM eras), then try again.
326 rdsta_val = rd_reg32(&ctrl->r4tst[0].rdsta) & RDSTA_MASK;
327 if ((status && status != JRSTA_SSRC_JUMP_HALT_CC) ||
328 (rdsta_val & rdsta_mask) != rdsta_mask) {
333 dev_info(ctrldev, "Instantiated RNG4 SH%d\n", sh_idx);
341 return devm_add_action_or_reset(ctrldev, devm_deinstantiate_rng, ctrldev);
345 * kick_trng - sets the various parameters for enabling the initialization
346 * of the RNG4 block in CAAM
347 * @pdev - pointer to the platform device
348 * @ent_delay - Defines the length (in system clocks) of each entropy sample.
350 static void kick_trng(struct platform_device *pdev, int ent_delay)
352 struct device *ctrldev = &pdev->dev;
353 struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
354 struct caam_ctrl __iomem *ctrl;
355 struct rng4tst __iomem *r4tst;
358 ctrl = (struct caam_ctrl __iomem *)ctrlpriv->ctrl;
359 r4tst = &ctrl->r4tst[0];
362 * Setting both RTMCTL:PRGM and RTMCTL:TRNG_ACC causes TRNG to
363 * properly invalidate the entropy in the entropy register and
364 * force re-generation.
366 clrsetbits_32(&r4tst->rtmctl, 0, RTMCTL_PRGM | RTMCTL_ACC);
369 * Performance-wise, it does not make sense to
370 * set the delay to a value that is lower
371 * than the last one that worked (i.e. the state handles
372 * were instantiated properly. Thus, instead of wasting
373 * time trying to set the values controlling the sample
374 * frequency, the function simply returns.
376 val = (rd_reg32(&r4tst->rtsdctl) & RTSDCTL_ENT_DLY_MASK)
377 >> RTSDCTL_ENT_DLY_SHIFT;
378 if (ent_delay <= val)
381 val = rd_reg32(&r4tst->rtsdctl);
382 val = (val & ~RTSDCTL_ENT_DLY_MASK) |
383 (ent_delay << RTSDCTL_ENT_DLY_SHIFT);
384 wr_reg32(&r4tst->rtsdctl, val);
385 /* min. freq. count, equal to 1/4 of the entropy sample length */
386 wr_reg32(&r4tst->rtfrqmin, ent_delay >> 2);
387 /* disable maximum frequency count */
388 wr_reg32(&r4tst->rtfrqmax, RTFRQMAX_DISABLE);
389 /* read the control register */
390 val = rd_reg32(&r4tst->rtmctl);
393 * select raw sampling in both entropy shifter
394 * and statistical checker; ; put RNG4 into run mode
396 clrsetbits_32(&r4tst->rtmctl, RTMCTL_PRGM | RTMCTL_ACC,
397 RTMCTL_SAMP_MODE_RAW_ES_SC);
400 static int caam_get_era_from_hw(struct caam_ctrl __iomem *ctrl)
402 static const struct {
426 ccbvid = rd_reg32(&ctrl->perfmon.ccb_id);
427 era = (ccbvid & CCBVID_ERA_MASK) >> CCBVID_ERA_SHIFT;
428 if (era) /* This is '0' prior to CAAM ERA-6 */
431 id_ms = rd_reg32(&ctrl->perfmon.caam_id_ms);
432 ip_id = (id_ms & SECVID_MS_IPID_MASK) >> SECVID_MS_IPID_SHIFT;
433 maj_rev = (id_ms & SECVID_MS_MAJ_REV_MASK) >> SECVID_MS_MAJ_REV_SHIFT;
435 for (i = 0; i < ARRAY_SIZE(id); i++)
436 if (id[i].ip_id == ip_id && id[i].maj_rev == maj_rev)
443 * caam_get_era() - Return the ERA of the SEC on SoC, based
444 * on "sec-era" optional property in the DTS. This property is updated
446 * In case this property is not passed an attempt to retrieve the CAAM
447 * era via register reads will be made.
449 * @ctrl: controller region
451 static int caam_get_era(struct caam_ctrl __iomem *ctrl)
453 struct device_node *caam_node;
457 caam_node = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0");
458 ret = of_property_read_u32(caam_node, "fsl,sec-era", &prop);
459 of_node_put(caam_node);
464 return caam_get_era_from_hw(ctrl);
468 * ERRATA: imx6 devices (imx6D, imx6Q, imx6DL, imx6S, imx6DP and imx6QP)
469 * have an issue wherein AXI bus transactions may not occur in the correct
470 * order. This isn't a problem running single descriptors, but can be if
471 * running multiple concurrent descriptors. Reworking the driver to throttle
472 * to single requests is impractical, thus the workaround is to limit the AXI
473 * pipeline to a depth of 1 (from it's default of 4) to preclude this situation
476 static void handle_imx6_err005766(u32 __iomem *mcr)
478 if (of_machine_is_compatible("fsl,imx6q") ||
479 of_machine_is_compatible("fsl,imx6dl") ||
480 of_machine_is_compatible("fsl,imx6qp"))
481 clrsetbits_32(mcr, MCFGR_AXIPIPE_MASK,
482 1 << MCFGR_AXIPIPE_SHIFT);
485 static const struct of_device_id caam_match[] = {
487 .compatible = "fsl,sec-v4.0",
490 .compatible = "fsl,sec4.0",
494 MODULE_DEVICE_TABLE(of, caam_match);
496 struct caam_imx_data {
497 const struct clk_bulk_data *clks;
501 static const struct clk_bulk_data caam_imx6_clks[] = {
505 { .id = "emi_slow" },
508 static const struct caam_imx_data caam_imx6_data = {
509 .clks = caam_imx6_clks,
510 .num_clks = ARRAY_SIZE(caam_imx6_clks),
513 static const struct clk_bulk_data caam_imx7_clks[] = {
518 static const struct caam_imx_data caam_imx7_data = {
519 .clks = caam_imx7_clks,
520 .num_clks = ARRAY_SIZE(caam_imx7_clks),
523 static const struct clk_bulk_data caam_imx6ul_clks[] = {
529 static const struct caam_imx_data caam_imx6ul_data = {
530 .clks = caam_imx6ul_clks,
531 .num_clks = ARRAY_SIZE(caam_imx6ul_clks),
534 static const struct clk_bulk_data caam_vf610_clks[] = {
538 static const struct caam_imx_data caam_vf610_data = {
539 .clks = caam_vf610_clks,
540 .num_clks = ARRAY_SIZE(caam_vf610_clks),
543 static const struct soc_device_attribute caam_imx_soc_table[] = {
544 { .soc_id = "i.MX6UL", .data = &caam_imx6ul_data },
545 { .soc_id = "i.MX6*", .data = &caam_imx6_data },
546 { .soc_id = "i.MX7*", .data = &caam_imx7_data },
547 { .soc_id = "i.MX8M*", .data = &caam_imx7_data },
548 { .soc_id = "VF*", .data = &caam_vf610_data },
549 { .family = "Freescale i.MX" },
553 static void disable_clocks(void *data)
555 struct caam_drv_private *ctrlpriv = data;
557 clk_bulk_disable_unprepare(ctrlpriv->num_clks, ctrlpriv->clks);
560 static int init_clocks(struct device *dev, const struct caam_imx_data *data)
562 struct caam_drv_private *ctrlpriv = dev_get_drvdata(dev);
565 ctrlpriv->num_clks = data->num_clks;
566 ctrlpriv->clks = devm_kmemdup(dev, data->clks,
567 data->num_clks * sizeof(data->clks[0]),
572 ret = devm_clk_bulk_get(dev, ctrlpriv->num_clks, ctrlpriv->clks);
575 "Failed to request all necessary clocks\n");
579 ret = clk_bulk_prepare_enable(ctrlpriv->num_clks, ctrlpriv->clks);
582 "Failed to prepare/enable all necessary clocks\n");
586 return devm_add_action_or_reset(dev, disable_clocks, ctrlpriv);
589 static void caam_remove_debugfs(void *root)
591 debugfs_remove_recursive(root);
594 #ifdef CONFIG_FSL_MC_BUS
595 static bool check_version(struct fsl_mc_version *mc_version, u32 major,
596 u32 minor, u32 revision)
598 if (mc_version->major > major)
601 if (mc_version->major == major) {
602 if (mc_version->minor > minor)
605 if (mc_version->minor == minor &&
606 mc_version->revision > revision)
614 static bool needs_entropy_delay_adjustment(void)
616 if (of_machine_is_compatible("fsl,imx6sx"))
621 /* Probe routine for CAAM top (controller) level */
622 static int caam_probe(struct platform_device *pdev)
624 int ret, ring, gen_sk, ent_delay = RTSDCTL_ENT_DLY_MIN;
626 const struct soc_device_attribute *imx_soc_match;
628 struct device_node *nprop, *np;
629 struct caam_ctrl __iomem *ctrl;
630 struct caam_drv_private *ctrlpriv;
631 struct dentry *dfs_root;
632 u32 scfgr, comp_params;
635 int BLOCK_OFFSET = 0;
636 bool pr_support = false;
638 ctrlpriv = devm_kzalloc(&pdev->dev, sizeof(*ctrlpriv), GFP_KERNEL);
643 dev_set_drvdata(dev, ctrlpriv);
644 nprop = pdev->dev.of_node;
646 imx_soc_match = soc_device_match(caam_imx_soc_table);
647 caam_imx = (bool)imx_soc_match;
650 if (!imx_soc_match->data) {
651 dev_err(dev, "No clock data provided for i.MX SoC");
655 ret = init_clocks(dev, imx_soc_match->data);
661 /* Get configuration properties from device tree */
662 /* First, get register page */
663 ctrl = devm_of_iomap(dev, nprop, 0, NULL);
664 ret = PTR_ERR_OR_ZERO(ctrl);
666 dev_err(dev, "caam: of_iomap() failed\n");
670 caam_little_end = !(bool)(rd_reg32(&ctrl->perfmon.status) &
671 (CSTA_PLEND | CSTA_ALT_PLEND));
672 comp_params = rd_reg32(&ctrl->perfmon.comp_parms_ms);
673 if (comp_params & CTPR_MS_PS && rd_reg32(&ctrl->mcr) & MCFGR_LONG_PTR)
674 caam_ptr_sz = sizeof(u64);
676 caam_ptr_sz = sizeof(u32);
677 caam_dpaa2 = !!(comp_params & CTPR_MS_DPAA2);
678 ctrlpriv->qi_present = !!(comp_params & CTPR_MS_QI_MASK);
680 #ifdef CONFIG_CAAM_QI
681 /* If (DPAA 1.x) QI present, check whether dependencies are available */
682 if (ctrlpriv->qi_present && !caam_dpaa2) {
683 ret = qman_is_probed();
685 return -EPROBE_DEFER;
686 } else if (ret < 0) {
687 dev_err(dev, "failing probe due to qman probe error\n");
691 ret = qman_portals_probed();
693 return -EPROBE_DEFER;
694 } else if (ret < 0) {
695 dev_err(dev, "failing probe due to qman portals probe error\n");
701 /* Allocating the BLOCK_OFFSET based on the supported page size on
704 pg_size = (comp_params & CTPR_MS_PG_SZ_MASK) >> CTPR_MS_PG_SZ_SHIFT;
706 BLOCK_OFFSET = PG_SIZE_4K;
708 BLOCK_OFFSET = PG_SIZE_64K;
710 ctrlpriv->ctrl = (struct caam_ctrl __iomem __force *)ctrl;
711 ctrlpriv->assure = (struct caam_assurance __iomem __force *)
712 ((__force uint8_t *)ctrl +
713 BLOCK_OFFSET * ASSURE_BLOCK_NUMBER
715 ctrlpriv->deco = (struct caam_deco __iomem __force *)
716 ((__force uint8_t *)ctrl +
717 BLOCK_OFFSET * DECO_BLOCK_NUMBER
720 /* Get the IRQ of the controller (for security violations only) */
721 ctrlpriv->secvio_irq = irq_of_parse_and_map(nprop, 0);
722 np = of_find_compatible_node(NULL, NULL, "fsl,qoriq-mc");
723 ctrlpriv->mc_en = !!np;
726 #ifdef CONFIG_FSL_MC_BUS
727 if (ctrlpriv->mc_en) {
728 struct fsl_mc_version *mc_version;
730 mc_version = fsl_mc_get_version();
732 pr_support = check_version(mc_version, 10, 20, 0);
734 return -EPROBE_DEFER;
739 * Enable DECO watchdogs and, if this is a PHYS_ADDR_T_64BIT kernel,
740 * long pointers in master configuration register.
741 * In case of SoCs with Management Complex, MC f/w performs
744 if (!ctrlpriv->mc_en)
745 clrsetbits_32(&ctrl->mcr, MCFGR_AWCACHE_MASK,
746 MCFGR_AWCACHE_CACH | MCFGR_AWCACHE_BUFF |
747 MCFGR_WDENABLE | MCFGR_LARGE_BURST);
749 handle_imx6_err005766(&ctrl->mcr);
752 * Read the Compile Time parameters and SCFGR to determine
753 * if virtualization is enabled for this platform
755 scfgr = rd_reg32(&ctrl->scfgr);
757 ctrlpriv->virt_en = 0;
758 if (comp_params & CTPR_MS_VIRT_EN_INCL) {
759 /* VIRT_EN_INCL = 1 & VIRT_EN_POR = 1 or
760 * VIRT_EN_INCL = 1 & VIRT_EN_POR = 0 & SCFGR_VIRT_EN = 1
762 if ((comp_params & CTPR_MS_VIRT_EN_POR) ||
763 (!(comp_params & CTPR_MS_VIRT_EN_POR) &&
764 (scfgr & SCFGR_VIRT_EN)))
765 ctrlpriv->virt_en = 1;
767 /* VIRT_EN_INCL = 0 && VIRT_EN_POR_VALUE = 1 */
768 if (comp_params & CTPR_MS_VIRT_EN_POR)
769 ctrlpriv->virt_en = 1;
772 if (ctrlpriv->virt_en == 1)
773 clrsetbits_32(&ctrl->jrstart, 0, JRSTART_JR0_START |
774 JRSTART_JR1_START | JRSTART_JR2_START |
777 ret = dma_set_mask_and_coherent(dev, caam_get_dma_mask(dev));
779 dev_err(dev, "dma_set_mask_and_coherent failed (%d)\n", ret);
783 ctrlpriv->era = caam_get_era(ctrl);
784 ctrlpriv->domain = iommu_get_domain_for_dev(dev);
786 dfs_root = debugfs_create_dir(dev_name(dev), NULL);
787 if (IS_ENABLED(CONFIG_DEBUG_FS)) {
788 ret = devm_add_action_or_reset(dev, caam_remove_debugfs,
794 caam_debugfs_init(ctrlpriv, dfs_root);
796 /* Check to see if (DPAA 1.x) QI present. If so, enable */
797 if (ctrlpriv->qi_present && !caam_dpaa2) {
798 ctrlpriv->qi = (struct caam_queue_if __iomem __force *)
799 ((__force uint8_t *)ctrl +
800 BLOCK_OFFSET * QI_BLOCK_NUMBER
802 /* This is all that's required to physically enable QI */
803 wr_reg32(&ctrlpriv->qi->qi_control_lo, QICTL_DQEN);
805 /* If QMAN driver is present, init CAAM-QI backend */
806 #ifdef CONFIG_CAAM_QI
807 ret = caam_qi_init(pdev);
809 dev_err(dev, "caam qi i/f init failed: %d\n", ret);
814 for_each_available_child_of_node(nprop, np)
815 if (of_device_is_compatible(np, "fsl,sec-v4.0-job-ring") ||
816 of_device_is_compatible(np, "fsl,sec4.0-job-ring")) {
817 ctrlpriv->jr[ring] = (struct caam_job_ring __iomem __force *)
818 ((__force uint8_t *)ctrl +
819 (ring + JR_BLOCK_NUMBER) *
822 ctrlpriv->total_jobrs++;
826 /* If no QI and no rings specified, quit and go home */
827 if ((!ctrlpriv->qi_present) && (!ctrlpriv->total_jobrs)) {
828 dev_err(dev, "no queues configured, terminating\n");
832 if (ctrlpriv->era < 10)
833 rng_vid = (rd_reg32(&ctrl->perfmon.cha_id_ls) &
834 CHA_ID_LS_RNG_MASK) >> CHA_ID_LS_RNG_SHIFT;
836 rng_vid = (rd_reg32(&ctrl->vreg.rng) & CHA_VER_VID_MASK) >>
840 * If SEC has RNG version >= 4 and RNG state handle has not been
841 * already instantiated, do RNG instantiation
842 * In case of SoCs with Management Complex, RNG is managed by MC f/w.
844 if (!(ctrlpriv->mc_en && pr_support) && rng_vid >= 4) {
845 ctrlpriv->rng4_sh_init =
846 rd_reg32(&ctrl->r4tst[0].rdsta);
848 * If the secure keys (TDKEK, JDKEK, TDSK), were already
849 * generated, signal this to the function that is instantiating
850 * the state handles. An error would occur if RNG4 attempts
851 * to regenerate these keys before the next POR.
853 gen_sk = ctrlpriv->rng4_sh_init & RDSTA_SKVN ? 0 : 1;
854 ctrlpriv->rng4_sh_init &= RDSTA_MASK;
857 rd_reg32(&ctrl->r4tst[0].rdsta) &
860 * If either SH were instantiated by somebody else
861 * (e.g. u-boot) then it is assumed that the entropy
862 * parameters are properly set and thus the function
863 * setting these (kick_trng(...)) is skipped.
864 * Also, if a handle was instantiated, do not change
865 * the TRNG parameters.
867 if (needs_entropy_delay_adjustment())
869 if (!(ctrlpriv->rng4_sh_init || inst_handles)) {
871 "Entropy delay = %u\n",
873 kick_trng(pdev, ent_delay);
877 * if instantiate_rng(...) fails, the loop will rerun
878 * and the kick_trng(...) function will modify the
879 * upper and lower limits of the entropy sampling
880 * interval, leading to a successful initialization of
883 ret = instantiate_rng(dev, inst_handles,
886 * Entropy delay is determined via TRNG characterization.
887 * TRNG characterization is run across different voltages
889 * If worst case value for ent_dly is identified,
890 * the loop can be skipped for that platform.
892 if (needs_entropy_delay_adjustment())
896 * if here, the loop will rerun,
897 * so don't hog the CPU
900 } while ((ret == -EAGAIN) && (ent_delay < RTSDCTL_ENT_DLY_MAX));
902 dev_err(dev, "failed to instantiate RNG");
906 * Set handles initialized by this module as the complement of
907 * the already initialized ones
909 ctrlpriv->rng4_sh_init = ~ctrlpriv->rng4_sh_init & RDSTA_MASK;
911 /* Enable RDB bit so that RNG works faster */
912 clrsetbits_32(&ctrl->scfgr, 0, SCFGR_RDBENABLE);
915 /* NOTE: RTIC detection ought to go here, around Si time */
917 caam_id = (u64)rd_reg32(&ctrl->perfmon.caam_id_ms) << 32 |
918 (u64)rd_reg32(&ctrl->perfmon.caam_id_ls);
920 /* Report "alive" for developer to see */
921 dev_info(dev, "device ID = 0x%016llx (Era %d)\n", caam_id,
923 dev_info(dev, "job rings = %d, qi = %d\n",
924 ctrlpriv->total_jobrs, ctrlpriv->qi_present);
926 ret = devm_of_platform_populate(dev);
928 dev_err(dev, "JR platform devices creation error\n");
933 static struct platform_driver caam_driver = {
936 .of_match_table = caam_match,
941 module_platform_driver(caam_driver);
943 MODULE_LICENSE("GPL");
944 MODULE_DESCRIPTION("FSL CAAM request backend");
945 MODULE_AUTHOR("Freescale Semiconductor - NMG/STC");