Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 1 | /* * CAAM control-plane driver backend |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 2 | * Controller-level driver, kernel property detection, initialization |
| 3 | * |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 4 | * Copyright 2008-2012 Freescale Semiconductor, Inc. |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 5 | */ |
| 6 | |
Himangi Saraogi | 4776d38 | 2014-05-27 23:55:48 +0530 | [diff] [blame] | 7 | #include <linux/device.h> |
Rob Herring | 5af5073 | 2013-09-17 14:28:33 -0500 | [diff] [blame] | 8 | #include <linux/of_address.h> |
| 9 | #include <linux/of_irq.h> |
| 10 | |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 11 | #include "compat.h" |
| 12 | #include "regs.h" |
| 13 | #include "intern.h" |
| 14 | #include "jr.h" |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 15 | #include "desc_constr.h" |
| 16 | #include "error.h" |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 17 | |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 18 | /* |
| 19 | * Descriptor to instantiate RNG State Handle 0 in normal mode and |
| 20 | * load the JDKEK, TDKEK and TDSK registers |
| 21 | */ |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 22 | static void build_instantiation_desc(u32 *desc, int handle, int do_sk) |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 23 | { |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 24 | u32 *jump_cmd, op_flags; |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 25 | |
| 26 | init_job_desc(desc, 0); |
| 27 | |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 28 | op_flags = OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG | |
| 29 | (handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INIT; |
| 30 | |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 31 | /* INIT RNG in non-test mode */ |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 32 | append_operation(desc, op_flags); |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 33 | |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 34 | if (!handle && do_sk) { |
| 35 | /* |
| 36 | * For SH0, Secure Keys must be generated as well |
| 37 | */ |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 38 | |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 39 | /* wait for done */ |
| 40 | jump_cmd = append_jump(desc, JUMP_CLASS_CLASS1); |
| 41 | set_jump_tgt_here(desc, jump_cmd); |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 42 | |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 43 | /* |
| 44 | * load 1 to clear written reg: |
| 45 | * resets the done interrrupt and returns the RNG to idle. |
| 46 | */ |
| 47 | append_load_imm_u32(desc, 1, LDST_SRCDST_WORD_CLRW); |
| 48 | |
| 49 | /* Initialize State Handle */ |
| 50 | append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG | |
| 51 | OP_ALG_AAI_RNG4_SK); |
| 52 | } |
Alex Porosanu | d5e4e99 | 2013-09-09 18:56:28 +0300 | [diff] [blame] | 53 | |
| 54 | append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT); |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 55 | } |
| 56 | |
Alex Porosanu | b1f996e0 | 2013-09-09 18:56:32 +0300 | [diff] [blame] | 57 | /* Descriptor for deinstantiation of State Handle 0 of the RNG block. */ |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 58 | static void build_deinstantiation_desc(u32 *desc, int handle) |
Alex Porosanu | b1f996e0 | 2013-09-09 18:56:32 +0300 | [diff] [blame] | 59 | { |
| 60 | init_job_desc(desc, 0); |
| 61 | |
| 62 | /* Uninstantiate State Handle 0 */ |
| 63 | append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG | |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 64 | (handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INITFINAL); |
Alex Porosanu | b1f996e0 | 2013-09-09 18:56:32 +0300 | [diff] [blame] | 65 | |
| 66 | append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT); |
| 67 | } |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 68 | |
| 69 | /* |
| 70 | * run_descriptor_deco0 - runs a descriptor on DECO0, under direct control of |
| 71 | * the software (no JR/QI used). |
| 72 | * @ctrldev - pointer to device |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 73 | * @status - descriptor status, after being run |
| 74 | * |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 75 | * Return: - 0 if no error occurred |
| 76 | * - -ENODEV if the DECO couldn't be acquired |
| 77 | * - -EAGAIN if an error occurred while executing the descriptor |
| 78 | */ |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 79 | static inline int run_descriptor_deco0(struct device *ctrldev, u32 *desc, |
| 80 | u32 *status) |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 81 | { |
Ruchika Gupta | 997ad29 | 2013-07-04 11:26:03 +0530 | [diff] [blame] | 82 | struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev); |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 83 | struct caam_ctrl __iomem *ctrl = ctrlpriv->ctrl; |
| 84 | struct caam_deco __iomem *deco = ctrlpriv->deco; |
Ruchika Gupta | 997ad29 | 2013-07-04 11:26:03 +0530 | [diff] [blame] | 85 | unsigned int timeout = 100000; |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 86 | u32 deco_dbg_reg, flags; |
Alex Porosanu | b1f996e0 | 2013-09-09 18:56:32 +0300 | [diff] [blame] | 87 | int i; |
Ruchika Gupta | 997ad29 | 2013-07-04 11:26:03 +0530 | [diff] [blame] | 88 | |
Ruchika Gupta | 17157c9 | 2014-06-23 17:42:33 +0530 | [diff] [blame] | 89 | |
Horia Geanta | 8f1da7b | 2014-07-21 16:03:21 +0300 | [diff] [blame] | 90 | if (ctrlpriv->virt_en == 1) { |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 91 | setbits32(&ctrl->deco_rsr, DECORSR_JR0); |
Ruchika Gupta | 17157c9 | 2014-06-23 17:42:33 +0530 | [diff] [blame] | 92 | |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 93 | while (!(rd_reg32(&ctrl->deco_rsr) & DECORSR_VALID) && |
Horia Geanta | 8f1da7b | 2014-07-21 16:03:21 +0300 | [diff] [blame] | 94 | --timeout) |
| 95 | cpu_relax(); |
| 96 | |
| 97 | timeout = 100000; |
| 98 | } |
Ruchika Gupta | 17157c9 | 2014-06-23 17:42:33 +0530 | [diff] [blame] | 99 | |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 100 | setbits32(&ctrl->deco_rq, DECORR_RQD0ENABLE); |
Ruchika Gupta | 997ad29 | 2013-07-04 11:26:03 +0530 | [diff] [blame] | 101 | |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 102 | while (!(rd_reg32(&ctrl->deco_rq) & DECORR_DEN0) && |
Ruchika Gupta | 997ad29 | 2013-07-04 11:26:03 +0530 | [diff] [blame] | 103 | --timeout) |
| 104 | cpu_relax(); |
| 105 | |
| 106 | if (!timeout) { |
| 107 | dev_err(ctrldev, "failed to acquire DECO 0\n"); |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 108 | clrbits32(&ctrl->deco_rq, DECORR_RQD0ENABLE); |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 109 | return -ENODEV; |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 110 | } |
| 111 | |
Ruchika Gupta | 997ad29 | 2013-07-04 11:26:03 +0530 | [diff] [blame] | 112 | for (i = 0; i < desc_len(desc); i++) |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 113 | wr_reg32(&deco->descbuf[i], *(desc + i)); |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 114 | |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 115 | flags = DECO_JQCR_WHL; |
| 116 | /* |
| 117 | * If the descriptor length is longer than 4 words, then the |
| 118 | * FOUR bit in JRCTRL register must be set. |
| 119 | */ |
| 120 | if (desc_len(desc) >= 4) |
| 121 | flags |= DECO_JQCR_FOUR; |
| 122 | |
| 123 | /* Instruct the DECO to execute it */ |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 124 | wr_reg32(&deco->jr_ctl_hi, flags); |
Ruchika Gupta | 997ad29 | 2013-07-04 11:26:03 +0530 | [diff] [blame] | 125 | |
| 126 | timeout = 10000000; |
Alex Porosanu | 84cf482 | 2013-09-09 18:56:30 +0300 | [diff] [blame] | 127 | do { |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 128 | deco_dbg_reg = rd_reg32(&deco->desc_dbg); |
Alex Porosanu | 84cf482 | 2013-09-09 18:56:30 +0300 | [diff] [blame] | 129 | /* |
| 130 | * If an error occured in the descriptor, then |
| 131 | * the DECO status field will be set to 0x0D |
| 132 | */ |
| 133 | if ((deco_dbg_reg & DESC_DBG_DECO_STAT_MASK) == |
| 134 | DESC_DBG_DECO_STAT_HOST_ERR) |
| 135 | break; |
Ruchika Gupta | 997ad29 | 2013-07-04 11:26:03 +0530 | [diff] [blame] | 136 | cpu_relax(); |
Alex Porosanu | 84cf482 | 2013-09-09 18:56:30 +0300 | [diff] [blame] | 137 | } while ((deco_dbg_reg & DESC_DBG_DECO_STAT_VALID) && --timeout); |
Ruchika Gupta | 997ad29 | 2013-07-04 11:26:03 +0530 | [diff] [blame] | 138 | |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 139 | *status = rd_reg32(&deco->op_status_hi) & |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 140 | DECO_OP_STATUS_HI_ERR_MASK; |
| 141 | |
Ruchika Gupta | 17157c9 | 2014-06-23 17:42:33 +0530 | [diff] [blame] | 142 | if (ctrlpriv->virt_en == 1) |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 143 | clrbits32(&ctrl->deco_rsr, DECORSR_JR0); |
Ruchika Gupta | 17157c9 | 2014-06-23 17:42:33 +0530 | [diff] [blame] | 144 | |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 145 | /* Mark the DECO as free */ |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 146 | clrbits32(&ctrl->deco_rq, DECORR_RQD0ENABLE); |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 147 | |
| 148 | if (!timeout) |
| 149 | return -EAGAIN; |
| 150 | |
| 151 | return 0; |
| 152 | } |
| 153 | |
| 154 | /* |
| 155 | * instantiate_rng - builds and executes a descriptor on DECO0, |
| 156 | * which initializes the RNG block. |
| 157 | * @ctrldev - pointer to device |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 158 | * @state_handle_mask - bitmask containing the instantiation status |
| 159 | * for the RNG4 state handles which exist in |
| 160 | * the RNG4 block: 1 if it's been instantiated |
| 161 | * by an external entry, 0 otherwise. |
| 162 | * @gen_sk - generate data to be loaded into the JDKEK, TDKEK and TDSK; |
| 163 | * Caution: this can be done only once; if the keys need to be |
| 164 | * regenerated, a POR is required |
| 165 | * |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 166 | * Return: - 0 if no error occurred |
| 167 | * - -ENOMEM if there isn't enough memory to allocate the descriptor |
| 168 | * - -ENODEV if DECO0 couldn't be acquired |
| 169 | * - -EAGAIN if an error occurred when executing the descriptor |
| 170 | * f.i. there was a RNG hardware error due to not "good enough" |
| 171 | * entropy being aquired. |
| 172 | */ |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 173 | static int instantiate_rng(struct device *ctrldev, int state_handle_mask, |
| 174 | int gen_sk) |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 175 | { |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 176 | struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev); |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 177 | struct caam_ctrl __iomem *ctrl; |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 178 | u32 *desc, status, rdsta_val; |
| 179 | int ret = 0, sh_idx; |
| 180 | |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 181 | ctrl = (struct caam_ctrl __iomem *)ctrlpriv->ctrl; |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 182 | desc = kmalloc(CAAM_CMD_SZ * 7, GFP_KERNEL); |
| 183 | if (!desc) |
| 184 | return -ENOMEM; |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 185 | |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 186 | for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) { |
| 187 | /* |
| 188 | * If the corresponding bit is set, this state handle |
| 189 | * was initialized by somebody else, so it's left alone. |
| 190 | */ |
| 191 | if ((1 << sh_idx) & state_handle_mask) |
| 192 | continue; |
| 193 | |
| 194 | /* Create the descriptor for instantiating RNG State Handle */ |
| 195 | build_instantiation_desc(desc, sh_idx, gen_sk); |
| 196 | |
| 197 | /* Try to run it through DECO0 */ |
| 198 | ret = run_descriptor_deco0(ctrldev, desc, &status); |
| 199 | |
| 200 | /* |
| 201 | * If ret is not 0, or descriptor status is not 0, then |
| 202 | * something went wrong. No need to try the next state |
| 203 | * handle (if available), bail out here. |
| 204 | * Also, if for some reason, the State Handle didn't get |
| 205 | * instantiated although the descriptor has finished |
| 206 | * without any error (HW optimizations for later |
| 207 | * CAAM eras), then try again. |
| 208 | */ |
Cristian Stoica | 467707b | 2015-01-21 11:53:31 +0200 | [diff] [blame] | 209 | rdsta_val = rd_reg32(&ctrl->r4tst[0].rdsta) & RDSTA_IFMASK; |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 210 | if (status || !(rdsta_val & (1 << sh_idx))) |
| 211 | ret = -EAGAIN; |
| 212 | if (ret) |
| 213 | break; |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 214 | dev_info(ctrldev, "Instantiated RNG4 SH%d\n", sh_idx); |
| 215 | /* Clear the contents before recreating the descriptor */ |
| 216 | memset(desc, 0x00, CAAM_CMD_SZ * 7); |
Ruchika Gupta | 997ad29 | 2013-07-04 11:26:03 +0530 | [diff] [blame] | 217 | } |
| 218 | |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 219 | kfree(desc); |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 220 | |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 221 | return ret; |
| 222 | } |
| 223 | |
| 224 | /* |
Alex Porosanu | b1f996e0 | 2013-09-09 18:56:32 +0300 | [diff] [blame] | 225 | * deinstantiate_rng - builds and executes a descriptor on DECO0, |
| 226 | * which deinitializes the RNG block. |
| 227 | * @ctrldev - pointer to device |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 228 | * @state_handle_mask - bitmask containing the instantiation status |
| 229 | * for the RNG4 state handles which exist in |
| 230 | * the RNG4 block: 1 if it's been instantiated |
Alex Porosanu | b1f996e0 | 2013-09-09 18:56:32 +0300 | [diff] [blame] | 231 | * |
| 232 | * Return: - 0 if no error occurred |
| 233 | * - -ENOMEM if there isn't enough memory to allocate the descriptor |
| 234 | * - -ENODEV if DECO0 couldn't be acquired |
| 235 | * - -EAGAIN if an error occurred when executing the descriptor |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 236 | */ |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 237 | static int deinstantiate_rng(struct device *ctrldev, int state_handle_mask) |
Alex Porosanu | b1f996e0 | 2013-09-09 18:56:32 +0300 | [diff] [blame] | 238 | { |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 239 | u32 *desc, status; |
| 240 | int sh_idx, ret = 0; |
Alex Porosanu | b1f996e0 | 2013-09-09 18:56:32 +0300 | [diff] [blame] | 241 | |
| 242 | desc = kmalloc(CAAM_CMD_SZ * 3, GFP_KERNEL); |
| 243 | if (!desc) |
| 244 | return -ENOMEM; |
| 245 | |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 246 | for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) { |
| 247 | /* |
| 248 | * If the corresponding bit is set, then it means the state |
| 249 | * handle was initialized by us, and thus it needs to be |
| 250 | * deintialized as well |
| 251 | */ |
| 252 | if ((1 << sh_idx) & state_handle_mask) { |
| 253 | /* |
| 254 | * Create the descriptor for deinstantating this state |
| 255 | * handle |
| 256 | */ |
| 257 | build_deinstantiation_desc(desc, sh_idx); |
Alex Porosanu | b1f996e0 | 2013-09-09 18:56:32 +0300 | [diff] [blame] | 258 | |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 259 | /* Try to run it through DECO0 */ |
| 260 | ret = run_descriptor_deco0(ctrldev, desc, &status); |
Alex Porosanu | b1f996e0 | 2013-09-09 18:56:32 +0300 | [diff] [blame] | 261 | |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 262 | if (ret || status) { |
| 263 | dev_err(ctrldev, |
| 264 | "Failed to deinstantiate RNG4 SH%d\n", |
| 265 | sh_idx); |
| 266 | break; |
| 267 | } |
| 268 | dev_info(ctrldev, "Deinstantiated RNG4 SH%d\n", sh_idx); |
| 269 | } |
| 270 | } |
Alex Porosanu | b1f996e0 | 2013-09-09 18:56:32 +0300 | [diff] [blame] | 271 | |
| 272 | kfree(desc); |
| 273 | |
| 274 | return ret; |
| 275 | } |
| 276 | |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 277 | static int caam_remove(struct platform_device *pdev) |
| 278 | { |
| 279 | struct device *ctrldev; |
| 280 | struct caam_drv_private *ctrlpriv; |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 281 | struct caam_ctrl __iomem *ctrl; |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 282 | int ring, ret = 0; |
| 283 | |
| 284 | ctrldev = &pdev->dev; |
| 285 | ctrlpriv = dev_get_drvdata(ctrldev); |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 286 | ctrl = (struct caam_ctrl __iomem *)ctrlpriv->ctrl; |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 287 | |
Ruchika Gupta | 313ea29 | 2013-10-25 12:01:01 +0530 | [diff] [blame] | 288 | /* Remove platform devices for JobRs */ |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 289 | for (ring = 0; ring < ctrlpriv->total_jobrs; ring++) { |
Ruchika Gupta | 313ea29 | 2013-10-25 12:01:01 +0530 | [diff] [blame] | 290 | if (ctrlpriv->jrpdev[ring]) |
| 291 | of_device_unregister(ctrlpriv->jrpdev[ring]); |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 292 | } |
| 293 | |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 294 | /* De-initialize RNG state handles initialized by this driver. */ |
| 295 | if (ctrlpriv->rng4_sh_init) |
| 296 | deinstantiate_rng(ctrldev, ctrlpriv->rng4_sh_init); |
Alex Porosanu | b1f996e0 | 2013-09-09 18:56:32 +0300 | [diff] [blame] | 297 | |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 298 | /* Shut down debug views */ |
| 299 | #ifdef CONFIG_DEBUG_FS |
| 300 | debugfs_remove_recursive(ctrlpriv->dfs_root); |
| 301 | #endif |
| 302 | |
| 303 | /* Unmap controller region */ |
Victoria Milhoan | f4ec6aa | 2015-06-15 16:52:58 -0700 | [diff] [blame] | 304 | iounmap(ctrl); |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 305 | |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 306 | return ret; |
| 307 | } |
| 308 | |
| 309 | /* |
Alex Porosanu | 84cf482 | 2013-09-09 18:56:30 +0300 | [diff] [blame] | 310 | * kick_trng - sets the various parameters for enabling the initialization |
| 311 | * of the RNG4 block in CAAM |
| 312 | * @pdev - pointer to the platform device |
| 313 | * @ent_delay - Defines the length (in system clocks) of each entropy sample. |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 314 | */ |
Alex Porosanu | 84cf482 | 2013-09-09 18:56:30 +0300 | [diff] [blame] | 315 | static void kick_trng(struct platform_device *pdev, int ent_delay) |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 316 | { |
| 317 | struct device *ctrldev = &pdev->dev; |
| 318 | struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev); |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 319 | struct caam_ctrl __iomem *ctrl; |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 320 | struct rng4tst __iomem *r4tst; |
| 321 | u32 val; |
| 322 | |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 323 | ctrl = (struct caam_ctrl __iomem *)ctrlpriv->ctrl; |
| 324 | r4tst = &ctrl->r4tst[0]; |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 325 | |
| 326 | /* put RNG4 into program mode */ |
| 327 | setbits32(&r4tst->rtmctl, RTMCTL_PRGM); |
Alex Porosanu | 84cf482 | 2013-09-09 18:56:30 +0300 | [diff] [blame] | 328 | |
| 329 | /* |
| 330 | * Performance-wise, it does not make sense to |
| 331 | * set the delay to a value that is lower |
| 332 | * than the last one that worked (i.e. the state handles |
| 333 | * were instantiated properly. Thus, instead of wasting |
| 334 | * time trying to set the values controlling the sample |
| 335 | * frequency, the function simply returns. |
| 336 | */ |
| 337 | val = (rd_reg32(&r4tst->rtsdctl) & RTSDCTL_ENT_DLY_MASK) |
| 338 | >> RTSDCTL_ENT_DLY_SHIFT; |
| 339 | if (ent_delay <= val) { |
| 340 | /* put RNG4 into run mode */ |
| 341 | clrbits32(&r4tst->rtmctl, RTMCTL_PRGM); |
| 342 | return; |
| 343 | } |
| 344 | |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 345 | val = rd_reg32(&r4tst->rtsdctl); |
Alex Porosanu | 84cf482 | 2013-09-09 18:56:30 +0300 | [diff] [blame] | 346 | val = (val & ~RTSDCTL_ENT_DLY_MASK) | |
| 347 | (ent_delay << RTSDCTL_ENT_DLY_SHIFT); |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 348 | wr_reg32(&r4tst->rtsdctl, val); |
Alex Porosanu | 84cf482 | 2013-09-09 18:56:30 +0300 | [diff] [blame] | 349 | /* min. freq. count, equal to 1/4 of the entropy sample length */ |
| 350 | wr_reg32(&r4tst->rtfrqmin, ent_delay >> 2); |
Alex Porosanu | b061f3f | 2014-08-11 11:40:15 +0300 | [diff] [blame] | 351 | /* disable maximum frequency count */ |
| 352 | wr_reg32(&r4tst->rtfrqmax, RTFRQMAX_DISABLE); |
Alex Porosanu | e5ffbfc | 2014-08-11 11:40:17 +0300 | [diff] [blame] | 353 | /* read the control register */ |
| 354 | val = rd_reg32(&r4tst->rtmctl); |
| 355 | /* |
| 356 | * select raw sampling in both entropy shifter |
| 357 | * and statistical checker |
| 358 | */ |
| 359 | setbits32(&val, RTMCTL_SAMP_MODE_RAW_ES_SC); |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 360 | /* put RNG4 into run mode */ |
Alex Porosanu | e5ffbfc | 2014-08-11 11:40:17 +0300 | [diff] [blame] | 361 | clrbits32(&val, RTMCTL_PRGM); |
| 362 | /* write back the control register */ |
| 363 | wr_reg32(&r4tst->rtmctl, val); |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 364 | } |
| 365 | |
Alex Porosanu | 82c2f96 | 2012-07-11 11:06:11 +0800 | [diff] [blame] | 366 | /** |
| 367 | * caam_get_era() - Return the ERA of the SEC on SoC, based |
Alex Porosanu | 883619a | 2014-02-06 10:27:19 +0200 | [diff] [blame] | 368 | * on "sec-era" propery in the DTS. This property is updated by u-boot. |
Alex Porosanu | 82c2f96 | 2012-07-11 11:06:11 +0800 | [diff] [blame] | 369 | **/ |
Alex Porosanu | 883619a | 2014-02-06 10:27:19 +0200 | [diff] [blame] | 370 | int caam_get_era(void) |
Alex Porosanu | 82c2f96 | 2012-07-11 11:06:11 +0800 | [diff] [blame] | 371 | { |
Alex Porosanu | 883619a | 2014-02-06 10:27:19 +0200 | [diff] [blame] | 372 | struct device_node *caam_node; |
| 373 | for_each_compatible_node(caam_node, NULL, "fsl,sec-v4.0") { |
| 374 | const uint32_t *prop = (uint32_t *)of_get_property(caam_node, |
| 375 | "fsl,sec-era", |
| 376 | NULL); |
| 377 | return prop ? *prop : -ENOTSUPP; |
| 378 | } |
Alex Porosanu | 82c2f96 | 2012-07-11 11:06:11 +0800 | [diff] [blame] | 379 | |
| 380 | return -ENOTSUPP; |
| 381 | } |
| 382 | EXPORT_SYMBOL(caam_get_era); |
| 383 | |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 384 | /* Probe routine for CAAM top (controller) level */ |
Kim Phillips | 2930d49 | 2011-05-14 22:07:55 -0500 | [diff] [blame] | 385 | static int caam_probe(struct platform_device *pdev) |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 386 | { |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 387 | int ret, ring, rspec, gen_sk, ent_delay = RTSDCTL_ENT_DLY_MIN; |
Alex Porosanu | 82c2f96 | 2012-07-11 11:06:11 +0800 | [diff] [blame] | 388 | u64 caam_id; |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 389 | struct device *dev; |
| 390 | struct device_node *nprop, *np; |
| 391 | struct caam_ctrl __iomem *ctrl; |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 392 | struct caam_drv_private *ctrlpriv; |
Kim Phillips | 23457bc | 2011-06-05 16:42:54 -0500 | [diff] [blame] | 393 | #ifdef CONFIG_DEBUG_FS |
| 394 | struct caam_perfmon *perfmon; |
| 395 | #endif |
Ruchika Gupta | 17157c9 | 2014-06-23 17:42:33 +0530 | [diff] [blame] | 396 | u32 scfgr, comp_params; |
Ruchika Gupta | eb1139c | 2014-06-23 15:08:28 +0530 | [diff] [blame] | 397 | u32 cha_vid_ls; |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 398 | int pg_size; |
| 399 | int BLOCK_OFFSET = 0; |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 400 | |
Himangi Saraogi | 4776d38 | 2014-05-27 23:55:48 +0530 | [diff] [blame] | 401 | ctrlpriv = devm_kzalloc(&pdev->dev, sizeof(struct caam_drv_private), |
| 402 | GFP_KERNEL); |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 403 | if (!ctrlpriv) |
| 404 | return -ENOMEM; |
| 405 | |
| 406 | dev = &pdev->dev; |
| 407 | dev_set_drvdata(dev, ctrlpriv); |
| 408 | ctrlpriv->pdev = pdev; |
| 409 | nprop = pdev->dev.of_node; |
| 410 | |
| 411 | /* Get configuration properties from device tree */ |
| 412 | /* First, get register page */ |
| 413 | ctrl = of_iomap(nprop, 0); |
| 414 | if (ctrl == NULL) { |
| 415 | dev_err(dev, "caam: of_iomap() failed\n"); |
| 416 | return -ENOMEM; |
| 417 | } |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 418 | /* Finding the page size for using the CTPR_MS register */ |
| 419 | comp_params = rd_reg32(&ctrl->perfmon.comp_parms_ms); |
| 420 | pg_size = (comp_params & CTPR_MS_PG_SZ_MASK) >> CTPR_MS_PG_SZ_SHIFT; |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 421 | |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 422 | /* Allocating the BLOCK_OFFSET based on the supported page size on |
| 423 | * the platform |
| 424 | */ |
| 425 | if (pg_size == 0) |
| 426 | BLOCK_OFFSET = PG_SIZE_4K; |
| 427 | else |
| 428 | BLOCK_OFFSET = PG_SIZE_64K; |
| 429 | |
| 430 | ctrlpriv->ctrl = (struct caam_ctrl __force *)ctrl; |
| 431 | ctrlpriv->assure = (struct caam_assurance __force *) |
| 432 | ((uint8_t *)ctrl + |
| 433 | BLOCK_OFFSET * ASSURE_BLOCK_NUMBER |
| 434 | ); |
| 435 | ctrlpriv->deco = (struct caam_deco __force *) |
| 436 | ((uint8_t *)ctrl + |
| 437 | BLOCK_OFFSET * DECO_BLOCK_NUMBER |
| 438 | ); |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 439 | |
| 440 | /* Get the IRQ of the controller (for security violations only) */ |
Thierry Reding | f757849 | 2013-09-18 15:24:44 +0200 | [diff] [blame] | 441 | ctrlpriv->secvio_irq = irq_of_parse_and_map(nprop, 0); |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 442 | |
| 443 | /* |
| 444 | * Enable DECO watchdogs and, if this is a PHYS_ADDR_T_64BIT kernel, |
Kim Phillips | e13af18 | 2012-06-22 19:48:51 -0500 | [diff] [blame] | 445 | * long pointers in master configuration register |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 446 | */ |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 447 | setbits32(&ctrl->mcr, MCFGR_WDENABLE | |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 448 | (sizeof(dma_addr_t) == sizeof(u64) ? MCFGR_LONG_PTR : 0)); |
| 449 | |
Ruchika Gupta | 17157c9 | 2014-06-23 17:42:33 +0530 | [diff] [blame] | 450 | /* |
| 451 | * Read the Compile Time paramters and SCFGR to determine |
| 452 | * if Virtualization is enabled for this platform |
| 453 | */ |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 454 | scfgr = rd_reg32(&ctrl->scfgr); |
Ruchika Gupta | 17157c9 | 2014-06-23 17:42:33 +0530 | [diff] [blame] | 455 | |
| 456 | ctrlpriv->virt_en = 0; |
| 457 | if (comp_params & CTPR_MS_VIRT_EN_INCL) { |
| 458 | /* VIRT_EN_INCL = 1 & VIRT_EN_POR = 1 or |
| 459 | * VIRT_EN_INCL = 1 & VIRT_EN_POR = 0 & SCFGR_VIRT_EN = 1 |
| 460 | */ |
| 461 | if ((comp_params & CTPR_MS_VIRT_EN_POR) || |
| 462 | (!(comp_params & CTPR_MS_VIRT_EN_POR) && |
| 463 | (scfgr & SCFGR_VIRT_EN))) |
| 464 | ctrlpriv->virt_en = 1; |
| 465 | } else { |
| 466 | /* VIRT_EN_INCL = 0 && VIRT_EN_POR_VALUE = 1 */ |
| 467 | if (comp_params & CTPR_MS_VIRT_EN_POR) |
| 468 | ctrlpriv->virt_en = 1; |
| 469 | } |
| 470 | |
| 471 | if (ctrlpriv->virt_en == 1) |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 472 | setbits32(&ctrl->jrstart, JRSTART_JR0_START | |
Ruchika Gupta | 17157c9 | 2014-06-23 17:42:33 +0530 | [diff] [blame] | 473 | JRSTART_JR1_START | JRSTART_JR2_START | |
| 474 | JRSTART_JR3_START); |
| 475 | |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 476 | if (sizeof(dma_addr_t) == sizeof(u64)) |
Kim Phillips | e13af18 | 2012-06-22 19:48:51 -0500 | [diff] [blame] | 477 | if (of_device_is_compatible(nprop, "fsl,sec-v5.0")) |
Horia Geanta | a2ac287 | 2014-07-11 15:34:47 +0300 | [diff] [blame] | 478 | dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40)); |
Kim Phillips | e13af18 | 2012-06-22 19:48:51 -0500 | [diff] [blame] | 479 | else |
Horia Geanta | a2ac287 | 2014-07-11 15:34:47 +0300 | [diff] [blame] | 480 | dma_set_mask_and_coherent(dev, DMA_BIT_MASK(36)); |
Kim Phillips | e13af18 | 2012-06-22 19:48:51 -0500 | [diff] [blame] | 481 | else |
Horia Geanta | a2ac287 | 2014-07-11 15:34:47 +0300 | [diff] [blame] | 482 | dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 483 | |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 484 | /* |
| 485 | * Detect and enable JobRs |
| 486 | * First, find out how many ring spec'ed, allocate references |
| 487 | * for all, then go probe each one. |
| 488 | */ |
| 489 | rspec = 0; |
Nitesh Lal | 0a63b09 | 2014-02-09 09:59:13 +0800 | [diff] [blame] | 490 | for_each_available_child_of_node(nprop, np) |
| 491 | if (of_device_is_compatible(np, "fsl,sec-v4.0-job-ring") || |
| 492 | of_device_is_compatible(np, "fsl,sec4.0-job-ring")) |
Shengzhou Liu | a0ea0f6 | 2012-03-21 14:09:10 +0800 | [diff] [blame] | 493 | rspec++; |
Shengzhou Liu | a0ea0f6 | 2012-03-21 14:09:10 +0800 | [diff] [blame] | 494 | |
Himangi Saraogi | 4776d38 | 2014-05-27 23:55:48 +0530 | [diff] [blame] | 495 | ctrlpriv->jrpdev = devm_kzalloc(&pdev->dev, |
| 496 | sizeof(struct platform_device *) * rspec, |
| 497 | GFP_KERNEL); |
Ruchika Gupta | 313ea29 | 2013-10-25 12:01:01 +0530 | [diff] [blame] | 498 | if (ctrlpriv->jrpdev == NULL) { |
Victoria Milhoan | f4ec6aa | 2015-06-15 16:52:58 -0700 | [diff] [blame] | 499 | iounmap(ctrl); |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 500 | return -ENOMEM; |
| 501 | } |
| 502 | |
| 503 | ring = 0; |
| 504 | ctrlpriv->total_jobrs = 0; |
Nitesh Lal | 0a63b09 | 2014-02-09 09:59:13 +0800 | [diff] [blame] | 505 | for_each_available_child_of_node(nprop, np) |
| 506 | if (of_device_is_compatible(np, "fsl,sec-v4.0-job-ring") || |
| 507 | of_device_is_compatible(np, "fsl,sec4.0-job-ring")) { |
Ruchika Gupta | 313ea29 | 2013-10-25 12:01:01 +0530 | [diff] [blame] | 508 | ctrlpriv->jrpdev[ring] = |
| 509 | of_platform_device_create(np, NULL, dev); |
| 510 | if (!ctrlpriv->jrpdev[ring]) { |
| 511 | pr_warn("JR%d Platform device creation error\n", |
| 512 | ring); |
| 513 | continue; |
| 514 | } |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 515 | ctrlpriv->jr[ring] = (struct caam_job_ring __force *) |
| 516 | ((uint8_t *)ctrl + |
| 517 | (ring + JR_BLOCK_NUMBER) * |
| 518 | BLOCK_OFFSET |
| 519 | ); |
Shengzhou Liu | a0ea0f6 | 2012-03-21 14:09:10 +0800 | [diff] [blame] | 520 | ctrlpriv->total_jobrs++; |
| 521 | ring++; |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 522 | } |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 523 | |
| 524 | /* Check to see if QI present. If so, enable */ |
Ruchika Gupta | eb1139c | 2014-06-23 15:08:28 +0530 | [diff] [blame] | 525 | ctrlpriv->qi_present = |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 526 | !!(rd_reg32(&ctrl->perfmon.comp_parms_ms) & |
Ruchika Gupta | eb1139c | 2014-06-23 15:08:28 +0530 | [diff] [blame] | 527 | CTPR_MS_QI_MASK); |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 528 | if (ctrlpriv->qi_present) { |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 529 | ctrlpriv->qi = (struct caam_queue_if __force *) |
| 530 | ((uint8_t *)ctrl + |
| 531 | BLOCK_OFFSET * QI_BLOCK_NUMBER |
| 532 | ); |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 533 | /* This is all that's required to physically enable QI */ |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 534 | wr_reg32(&ctrlpriv->qi->qi_control_lo, QICTL_DQEN); |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 535 | } |
| 536 | |
| 537 | /* If no QI and no rings specified, quit and go home */ |
| 538 | if ((!ctrlpriv->qi_present) && (!ctrlpriv->total_jobrs)) { |
| 539 | dev_err(dev, "no queues configured, terminating\n"); |
| 540 | caam_remove(pdev); |
| 541 | return -ENOMEM; |
| 542 | } |
| 543 | |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 544 | cha_vid_ls = rd_reg32(&ctrl->perfmon.cha_id_ls); |
Ruchika Gupta | 986dfbc | 2013-04-26 15:44:54 +0530 | [diff] [blame] | 545 | |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 546 | /* |
Ruchika Gupta | 986dfbc | 2013-04-26 15:44:54 +0530 | [diff] [blame] | 547 | * If SEC has RNG version >= 4 and RNG state handle has not been |
Alex Porosanu | 84cf482 | 2013-09-09 18:56:30 +0300 | [diff] [blame] | 548 | * already instantiated, do RNG instantiation |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 549 | */ |
Ruchika Gupta | eb1139c | 2014-06-23 15:08:28 +0530 | [diff] [blame] | 550 | if ((cha_vid_ls & CHA_ID_LS_RNG_MASK) >> CHA_ID_LS_RNG_SHIFT >= 4) { |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 551 | ctrlpriv->rng4_sh_init = |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 552 | rd_reg32(&ctrl->r4tst[0].rdsta); |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 553 | /* |
| 554 | * If the secure keys (TDKEK, JDKEK, TDSK), were already |
| 555 | * generated, signal this to the function that is instantiating |
| 556 | * the state handles. An error would occur if RNG4 attempts |
| 557 | * to regenerate these keys before the next POR. |
| 558 | */ |
| 559 | gen_sk = ctrlpriv->rng4_sh_init & RDSTA_SKVN ? 0 : 1; |
| 560 | ctrlpriv->rng4_sh_init &= RDSTA_IFMASK; |
Alex Porosanu | 84cf482 | 2013-09-09 18:56:30 +0300 | [diff] [blame] | 561 | do { |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 562 | int inst_handles = |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 563 | rd_reg32(&ctrl->r4tst[0].rdsta) & |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 564 | RDSTA_IFMASK; |
| 565 | /* |
| 566 | * If either SH were instantiated by somebody else |
| 567 | * (e.g. u-boot) then it is assumed that the entropy |
| 568 | * parameters are properly set and thus the function |
| 569 | * setting these (kick_trng(...)) is skipped. |
| 570 | * Also, if a handle was instantiated, do not change |
| 571 | * the TRNG parameters. |
| 572 | */ |
| 573 | if (!(ctrlpriv->rng4_sh_init || inst_handles)) { |
Alex Porosanu | eeaa172 | 2014-08-11 11:40:16 +0300 | [diff] [blame] | 574 | dev_info(dev, |
| 575 | "Entropy delay = %u\n", |
| 576 | ent_delay); |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 577 | kick_trng(pdev, ent_delay); |
| 578 | ent_delay += 400; |
| 579 | } |
| 580 | /* |
| 581 | * if instantiate_rng(...) fails, the loop will rerun |
| 582 | * and the kick_trng(...) function will modfiy the |
| 583 | * upper and lower limits of the entropy sampling |
| 584 | * interval, leading to a sucessful initialization of |
| 585 | * the RNG. |
| 586 | */ |
| 587 | ret = instantiate_rng(dev, inst_handles, |
| 588 | gen_sk); |
Alex Porosanu | eeaa172 | 2014-08-11 11:40:16 +0300 | [diff] [blame] | 589 | if (ret == -EAGAIN) |
| 590 | /* |
| 591 | * if here, the loop will rerun, |
| 592 | * so don't hog the CPU |
| 593 | */ |
| 594 | cpu_relax(); |
Alex Porosanu | 04cddbf | 2013-09-09 18:56:31 +0300 | [diff] [blame] | 595 | } while ((ret == -EAGAIN) && (ent_delay < RTSDCTL_ENT_DLY_MAX)); |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 596 | if (ret) { |
Alex Porosanu | 84cf482 | 2013-09-09 18:56:30 +0300 | [diff] [blame] | 597 | dev_err(dev, "failed to instantiate RNG"); |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 598 | caam_remove(pdev); |
| 599 | return ret; |
| 600 | } |
Alex Porosanu | 1005bcc | 2013-09-09 18:56:34 +0300 | [diff] [blame] | 601 | /* |
| 602 | * Set handles init'ed by this module as the complement of the |
| 603 | * already initialized ones |
| 604 | */ |
| 605 | ctrlpriv->rng4_sh_init = ~ctrlpriv->rng4_sh_init & RDSTA_IFMASK; |
Vakul Garg | 575c1bd | 2013-03-12 13:55:21 +0530 | [diff] [blame] | 606 | |
| 607 | /* Enable RDB bit so that RNG works faster */ |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 608 | setbits32(&ctrl->scfgr, SCFGR_RDBENABLE); |
Kim Phillips | 281922a | 2012-06-22 19:48:52 -0500 | [diff] [blame] | 609 | } |
| 610 | |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 611 | /* NOTE: RTIC detection ought to go here, around Si time */ |
| 612 | |
Nitesh Narayan Lal | fb4562b | 2014-09-01 15:00:44 +0530 | [diff] [blame] | 613 | caam_id = (u64)rd_reg32(&ctrl->perfmon.caam_id_ms) << 32 | |
| 614 | (u64)rd_reg32(&ctrl->perfmon.caam_id_ls); |
Alex Porosanu | 82c2f96 | 2012-07-11 11:06:11 +0800 | [diff] [blame] | 615 | |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 616 | /* Report "alive" for developer to see */ |
Alex Porosanu | 82c2f96 | 2012-07-11 11:06:11 +0800 | [diff] [blame] | 617 | dev_info(dev, "device ID = 0x%016llx (Era %d)\n", caam_id, |
Alex Porosanu | 883619a | 2014-02-06 10:27:19 +0200 | [diff] [blame] | 618 | caam_get_era()); |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 619 | dev_info(dev, "job rings = %d, qi = %d\n", |
| 620 | ctrlpriv->total_jobrs, ctrlpriv->qi_present); |
| 621 | |
| 622 | #ifdef CONFIG_DEBUG_FS |
| 623 | /* |
| 624 | * FIXME: needs better naming distinction, as some amalgamation of |
| 625 | * "caam" and nprop->full_name. The OF name isn't distinctive, |
| 626 | * but does separate instances |
| 627 | */ |
| 628 | perfmon = (struct caam_perfmon __force *)&ctrl->perfmon; |
| 629 | |
Nitesh Narayan Lal | 178f827 | 2014-07-01 19:54:54 +0530 | [diff] [blame] | 630 | ctrlpriv->dfs_root = debugfs_create_dir(dev_name(dev), NULL); |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 631 | ctrlpriv->ctl = debugfs_create_dir("ctl", ctrlpriv->dfs_root); |
| 632 | |
| 633 | /* Controller-level - performance monitor counters */ |
| 634 | ctrlpriv->ctl_rq_dequeued = |
| 635 | debugfs_create_u64("rq_dequeued", |
Al Viro | eda65cc | 2011-07-24 04:32:53 -0400 | [diff] [blame] | 636 | S_IRUSR | S_IRGRP | S_IROTH, |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 637 | ctrlpriv->ctl, &perfmon->req_dequeued); |
| 638 | ctrlpriv->ctl_ob_enc_req = |
| 639 | debugfs_create_u64("ob_rq_encrypted", |
Al Viro | eda65cc | 2011-07-24 04:32:53 -0400 | [diff] [blame] | 640 | S_IRUSR | S_IRGRP | S_IROTH, |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 641 | ctrlpriv->ctl, &perfmon->ob_enc_req); |
| 642 | ctrlpriv->ctl_ib_dec_req = |
| 643 | debugfs_create_u64("ib_rq_decrypted", |
Al Viro | eda65cc | 2011-07-24 04:32:53 -0400 | [diff] [blame] | 644 | S_IRUSR | S_IRGRP | S_IROTH, |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 645 | ctrlpriv->ctl, &perfmon->ib_dec_req); |
| 646 | ctrlpriv->ctl_ob_enc_bytes = |
| 647 | debugfs_create_u64("ob_bytes_encrypted", |
Al Viro | eda65cc | 2011-07-24 04:32:53 -0400 | [diff] [blame] | 648 | S_IRUSR | S_IRGRP | S_IROTH, |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 649 | ctrlpriv->ctl, &perfmon->ob_enc_bytes); |
| 650 | ctrlpriv->ctl_ob_prot_bytes = |
| 651 | debugfs_create_u64("ob_bytes_protected", |
Al Viro | eda65cc | 2011-07-24 04:32:53 -0400 | [diff] [blame] | 652 | S_IRUSR | S_IRGRP | S_IROTH, |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 653 | ctrlpriv->ctl, &perfmon->ob_prot_bytes); |
| 654 | ctrlpriv->ctl_ib_dec_bytes = |
| 655 | debugfs_create_u64("ib_bytes_decrypted", |
Al Viro | eda65cc | 2011-07-24 04:32:53 -0400 | [diff] [blame] | 656 | S_IRUSR | S_IRGRP | S_IROTH, |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 657 | ctrlpriv->ctl, &perfmon->ib_dec_bytes); |
| 658 | ctrlpriv->ctl_ib_valid_bytes = |
| 659 | debugfs_create_u64("ib_bytes_validated", |
Al Viro | eda65cc | 2011-07-24 04:32:53 -0400 | [diff] [blame] | 660 | S_IRUSR | S_IRGRP | S_IROTH, |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 661 | ctrlpriv->ctl, &perfmon->ib_valid_bytes); |
| 662 | |
| 663 | /* Controller level - global status values */ |
| 664 | ctrlpriv->ctl_faultaddr = |
| 665 | debugfs_create_u64("fault_addr", |
Al Viro | eda65cc | 2011-07-24 04:32:53 -0400 | [diff] [blame] | 666 | S_IRUSR | S_IRGRP | S_IROTH, |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 667 | ctrlpriv->ctl, &perfmon->faultaddr); |
| 668 | ctrlpriv->ctl_faultdetail = |
| 669 | debugfs_create_u32("fault_detail", |
Al Viro | eda65cc | 2011-07-24 04:32:53 -0400 | [diff] [blame] | 670 | S_IRUSR | S_IRGRP | S_IROTH, |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 671 | ctrlpriv->ctl, &perfmon->faultdetail); |
| 672 | ctrlpriv->ctl_faultstatus = |
| 673 | debugfs_create_u32("fault_status", |
Al Viro | eda65cc | 2011-07-24 04:32:53 -0400 | [diff] [blame] | 674 | S_IRUSR | S_IRGRP | S_IROTH, |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 675 | ctrlpriv->ctl, &perfmon->status); |
| 676 | |
| 677 | /* Internal covering keys (useful in non-secure mode only) */ |
| 678 | ctrlpriv->ctl_kek_wrap.data = &ctrlpriv->ctrl->kek[0]; |
| 679 | ctrlpriv->ctl_kek_wrap.size = KEK_KEY_SIZE * sizeof(u32); |
| 680 | ctrlpriv->ctl_kek = debugfs_create_blob("kek", |
Al Viro | eda65cc | 2011-07-24 04:32:53 -0400 | [diff] [blame] | 681 | S_IRUSR | |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 682 | S_IRGRP | S_IROTH, |
| 683 | ctrlpriv->ctl, |
| 684 | &ctrlpriv->ctl_kek_wrap); |
| 685 | |
| 686 | ctrlpriv->ctl_tkek_wrap.data = &ctrlpriv->ctrl->tkek[0]; |
| 687 | ctrlpriv->ctl_tkek_wrap.size = KEK_KEY_SIZE * sizeof(u32); |
| 688 | ctrlpriv->ctl_tkek = debugfs_create_blob("tkek", |
Al Viro | eda65cc | 2011-07-24 04:32:53 -0400 | [diff] [blame] | 689 | S_IRUSR | |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 690 | S_IRGRP | S_IROTH, |
| 691 | ctrlpriv->ctl, |
| 692 | &ctrlpriv->ctl_tkek_wrap); |
| 693 | |
| 694 | ctrlpriv->ctl_tdsk_wrap.data = &ctrlpriv->ctrl->tdsk[0]; |
| 695 | ctrlpriv->ctl_tdsk_wrap.size = KEK_KEY_SIZE * sizeof(u32); |
| 696 | ctrlpriv->ctl_tdsk = debugfs_create_blob("tdsk", |
Al Viro | eda65cc | 2011-07-24 04:32:53 -0400 | [diff] [blame] | 697 | S_IRUSR | |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 698 | S_IRGRP | S_IROTH, |
| 699 | ctrlpriv->ctl, |
| 700 | &ctrlpriv->ctl_tdsk_wrap); |
| 701 | #endif |
| 702 | return 0; |
| 703 | } |
| 704 | |
| 705 | static struct of_device_id caam_match[] = { |
| 706 | { |
Kim Phillips | 54e198d | 2011-03-23 21:15:44 +0800 | [diff] [blame] | 707 | .compatible = "fsl,sec-v4.0", |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 708 | }, |
Shengzhou Liu | a0ea0f6 | 2012-03-21 14:09:10 +0800 | [diff] [blame] | 709 | { |
| 710 | .compatible = "fsl,sec4.0", |
| 711 | }, |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 712 | {}, |
| 713 | }; |
| 714 | MODULE_DEVICE_TABLE(of, caam_match); |
| 715 | |
Kim Phillips | 2930d49 | 2011-05-14 22:07:55 -0500 | [diff] [blame] | 716 | static struct platform_driver caam_driver = { |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 717 | .driver = { |
| 718 | .name = "caam", |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 719 | .of_match_table = caam_match, |
| 720 | }, |
| 721 | .probe = caam_probe, |
Greg Kroah-Hartman | 49cfe4d | 2012-12-21 13:14:09 -0800 | [diff] [blame] | 722 | .remove = caam_remove, |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 723 | }; |
| 724 | |
Axel Lin | 741e8c2 | 2011-11-26 21:26:19 +0800 | [diff] [blame] | 725 | module_platform_driver(caam_driver); |
Kim Phillips | 8e8ec59 | 2011-03-13 16:54:26 +0800 | [diff] [blame] | 726 | |
| 727 | MODULE_LICENSE("GPL"); |
| 728 | MODULE_DESCRIPTION("FSL CAAM request backend"); |
| 729 | MODULE_AUTHOR("Freescale Semiconductor - NMG/STC"); |