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https://github.com/nxp-imx/linux-imx.git
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MLK-17841: crypto: caam: Correct bugs in Secure Memory
This patch perform following modifications: - Send and receive SM command regrouped in 1 function - Verify that the JR device to use is valid - Modification of the error handling in the probe Signed-off-by: Franck LENORMAND <franck.lenormand@nxp.com> (Vipul: Fixed merge conflicts) Signed-off-by: Vipul Kumar <vipul_kumar@mentor.com>
This commit is contained in:
Franck LENORMAND
Leonard Crestez
parent
02bcf5b98b
commit
345ead4338
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@ -59,50 +59,42 @@ void sm_show_page(struct device *dev, struct sm_page_descriptor *pgdesc)
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#define INITIAL_DESCSZ 16 /* size of tmp buffer for descriptor const. */
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static __always_inline int sm_set_cmd_reg(struct caam_drv_private_sm *smpriv,
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static __always_inline u32 sm_send_cmd(struct caam_drv_private_sm *smpriv,
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struct caam_drv_private_jr *jrpriv,
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u32 val)
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u32 cmd, u32 *status)
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{
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void __iomem *write_address;
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void __iomem *read_address;
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if (smpriv->sm_reg_offset == SM_V1_OFFSET) {
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struct caam_secure_mem_v1 *sm_regs_v1;
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sm_regs_v1 = (struct caam_secure_mem_v1 *)
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((void *)jrpriv->rregs + SM_V1_OFFSET);
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wr_reg32(&sm_regs_v1->sm_cmd, val);
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write_address = &sm_regs_v1->sm_cmd;
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read_address = &sm_regs_v1->sm_status;
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} else if (smpriv->sm_reg_offset == SM_V2_OFFSET) {
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struct caam_secure_mem_v2 *sm_regs_v2;
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sm_regs_v2 = (struct caam_secure_mem_v2 *)
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((void *)jrpriv->rregs + SM_V2_OFFSET);
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wr_reg32(&sm_regs_v2->sm_cmd, val);
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write_address = &sm_regs_v2->sm_cmd;
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read_address = &sm_regs_v2->sm_status;
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} else {
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return -EINVAL;
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}
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return 0;
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}
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wr_reg32(write_address, cmd);
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static __always_inline u32 sm_get_status_reg(struct caam_drv_private_sm *smpriv,
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struct caam_drv_private_jr *jrpriv,
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u32 *val)
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{
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if (smpriv->sm_reg_offset == SM_V1_OFFSET) {
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struct caam_secure_mem_v1 *sm_regs_v1;
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udelay(10);
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sm_regs_v1 = (struct caam_secure_mem_v1 *)
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((void *)jrpriv->rregs + SM_V1_OFFSET);
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*val = rd_reg32(&sm_regs_v1->sm_status);
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} else if (smpriv->sm_reg_offset == SM_V2_OFFSET) {
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struct caam_secure_mem_v2 *sm_regs_v2;
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sm_regs_v2 = (struct caam_secure_mem_v2 *)
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((void *)jrpriv->rregs + SM_V2_OFFSET);
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*val = rd_reg32(&sm_regs_v2->sm_status);
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} else {
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return -EINVAL;
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}
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/* Read until the command has terminated and the status is correct */
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do {
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*status = rd_reg32(read_address);
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} while (((*status & SMCS_CMDERR_MASK) >> SMCS_CMDERR_SHIFT)
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== SMCS_CMDERR_INCOMP);
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return 0;
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}
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@ -997,6 +989,7 @@ int caam_sm_startup(struct platform_device *pdev)
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struct platform_device *sm_pdev;
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struct sm_page_descriptor *lpagedesc;
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u32 page, pgstat, lpagect, detectedpage, smvid, smpart;
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int ret = 0;
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struct device_node *np;
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ctrldev = &pdev->dev;
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@ -1006,8 +999,10 @@ int caam_sm_startup(struct platform_device *pdev)
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* If ctrlpriv is NULL, it's probably because the caam driver wasn't
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* properly initialized (e.g. RNG4 init failed). Thus, bail out here.
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*/
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if (!ctrlpriv)
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return -ENODEV;
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if (!ctrlpriv) {
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ret = -ENODEV;
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goto exit;
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}
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/*
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* Set up the private block for secure memory
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@ -1016,7 +1011,8 @@ int caam_sm_startup(struct platform_device *pdev)
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smpriv = kzalloc(sizeof(struct caam_drv_private_sm), GFP_KERNEL);
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if (smpriv == NULL) {
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dev_err(ctrldev, "can't alloc private mem for secure memory\n");
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return -ENOMEM;
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ret = -ENOMEM;
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goto exit;
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}
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smpriv->parentdev = ctrldev; /* copy of parent dev is handy */
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spin_lock_init(&smpriv->kslock);
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@ -1028,8 +1024,8 @@ int caam_sm_startup(struct platform_device *pdev)
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sm_pdev = of_platform_device_create(np, "caam_sm", ctrldev);
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if (sm_pdev == NULL) {
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kfree(smpriv);
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return -EINVAL;
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ret = -EINVAL;
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goto free_smpriv;
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}
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/* Save a pointer to the platform device for Secure Memory */
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@ -1090,26 +1086,37 @@ int caam_sm_startup(struct platform_device *pdev)
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* an SM instance to any ring instance).
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*/
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smpriv->smringdev = caam_jr_alloc();
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if (!smpriv->smringdev) {
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dev_err(smdev, "Device for job ring not created\n");
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ret = -ENODEV;
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goto unregister_smpdev;
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}
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jrpriv = dev_get_drvdata(smpriv->smringdev);
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lpagect = 0;
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pgstat = 0;
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lpagedesc = kzalloc(sizeof(struct sm_page_descriptor)
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* smpriv->max_pages, GFP_KERNEL);
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if (lpagedesc == NULL) {
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kfree(smpriv);
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return -ENOMEM;
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ret = -ENOMEM;
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goto free_smringdev;
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}
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for (page = 0; page < smpriv->max_pages; page++) {
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if (sm_set_cmd_reg(smpriv, jrpriv,
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((page << SMC_PAGE_SHIFT) & SMC_PAGE_MASK) |
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(SMC_CMD_PAGE_INQUIRY & SMC_CMD_MASK)))
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return -EINVAL;
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if (sm_get_status_reg(smpriv, jrpriv, &pgstat))
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return -EINVAL;
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u32 page_ownership;
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if (((pgstat & SMCS_PGWON_MASK) >> SMCS_PGOWN_SHIFT)
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== SMCS_PGOWN_OWNED) { /* our page? */
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if (sm_send_cmd(smpriv, jrpriv,
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((page << SMC_PAGE_SHIFT) & SMC_PAGE_MASK) |
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(SMC_CMD_PAGE_INQUIRY & SMC_CMD_MASK),
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&pgstat)) {
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ret = -EINVAL;
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goto free_lpagedesc;
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}
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page_ownership = (pgstat & SMCS_PGWON_MASK) >> SMCS_PGOWN_SHIFT;
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if ((page_ownership == SMCS_PGOWN_OWNED)
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|| (page_ownership == SMCS_PGOWN_NOOWN)) {
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/* page allocated */
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lpagedesc[page].phys_pagenum =
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(pgstat & SMCS_PAGE_MASK) >> SMCS_PAGE_SHIFT;
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lpagedesc[page].own_part =
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@ -1140,9 +1147,8 @@ int caam_sm_startup(struct platform_device *pdev)
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smpriv->pagedesc = kzalloc(sizeof(struct sm_page_descriptor) * lpagect,
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GFP_KERNEL);
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if (smpriv->pagedesc == NULL) {
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kfree(lpagedesc);
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kfree(smpriv);
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return -ENOMEM;
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ret = -ENOMEM;
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goto free_lpagedesc;
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}
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smpriv->localpages = lpagect;
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@ -1163,7 +1169,19 @@ int caam_sm_startup(struct platform_device *pdev)
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sm_init_keystore(smdev);
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return 0;
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goto exit;
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free_lpagedesc:
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kfree(lpagedesc);
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free_smringdev:
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caam_jr_free(smpriv->smringdev);
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unregister_smpdev:
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of_device_unregister(smpriv->sm_pdev);
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free_smpriv:
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kfree(smpriv);
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exit:
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return ret;
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}
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void caam_sm_shutdown(struct platform_device *pdev)
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@ -1182,6 +1200,8 @@ void caam_sm_shutdown(struct platform_device *pdev)
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smpriv = dev_get_drvdata(smdev);
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caam_jr_free(smpriv->smringdev);
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/* Remove Secure Memory Platform Device */
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of_device_unregister(smpriv->sm_pdev);
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