crypto: octeontx2 - add support to get engine capabilities

Adds support to get engine capabilities and adds a new mailbox
to share capabilities with VF driver.

Signed-off-by: Suheil Chandran <schandran@marvell.com>
Signed-off-by: Srujana Challa <schalla@marvell.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/marvell/octeontx2/otx2_cpt_common.h

@@ -20,6 +20,7 @@
 
 #define OTX2_CPT_INVALID_CRYPTO_ENG_GRP 0xFF
 #define OTX2_CPT_NAME_LENGTH 64
+#define OTX2_CPT_DMA_MINALIGN 128
 
 #define BAD_OTX2_CPT_ENG_TYPE OTX2_CPT_MAX_ENG_TYPES
 
@@ -32,6 +33,7 @@ enum otx2_cpt_eng_type {
 
 /* Take mbox id from end of CPT mbox range in AF (range 0xA00 - 0xBFF) */
 #define MBOX_MSG_GET_ENG_GRP_NUM        0xBFF
+#define MBOX_MSG_GET_CAPS               0xBFD
 
 /*
  * Message request and response to get engine group number
@@ -49,6 +51,40 @@ struct otx2_cpt_egrp_num_rsp {
 	u8 eng_grp_num;
 };
 
+/* CPT HW capabilities */
+union otx2_cpt_eng_caps {
+	u64 u;
+	struct {
+		u64 reserved_0_4:5;
+		u64 mul:1;
+		u64 sha1_sha2:1;
+		u64 chacha20:1;
+		u64 zuc_snow3g:1;
+		u64 sha3:1;
+		u64 aes:1;
+		u64 kasumi:1;
+		u64 des:1;
+		u64 crc:1;
+		u64 reserved_14_63:50;
+	};
+};
+
+/*
+ * Message request and response to get HW capabilities for each
+ * engine type (SE, IE, AE).
+ * This messages are only used between CPT PF <=> CPT VF
+ */
+struct otx2_cpt_caps_msg {
+	struct mbox_msghdr hdr;
+};
+
+struct otx2_cpt_caps_rsp {
+	struct mbox_msghdr hdr;
+	u16 cpt_pf_drv_version;
+	u8 cpt_revision;
+	union otx2_cpt_eng_caps eng_caps[OTX2_CPT_MAX_ENG_TYPES];
+};
+
 static inline void otx2_cpt_write64(void __iomem *reg_base, u64 blk, u64 slot,
 				    u64 offs, u64 val)
 {

drivers/crypto/marvell/octeontx2/otx2_cpt_reqmgr.h

@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: GPL-2.0-only
+ * Copyright (C) 2020 Marvell.
+ */
+
+#ifndef __OTX2_CPT_REQMGR_H
+#define __OTX2_CPT_REQMGR_H
+
+#include "otx2_cpt_common.h"
+
+/* Completion code size and initial value */
+#define OTX2_CPT_COMPLETION_CODE_SIZE 8
+#define OTX2_CPT_COMPLETION_CODE_INIT OTX2_CPT_COMP_E_NOTDONE
+
+union otx2_cpt_opcode {
+	u16 flags;
+	struct {
+		u8 major;
+		u8 minor;
+	} s;
+};
+
+/*
+ * CPT_INST_S software command definitions
+ * Words EI (0-3)
+ */
+union otx2_cpt_iq_cmd_word0 {
+	u64 u;
+	struct {
+		__be16 opcode;
+		__be16 param1;
+		__be16 param2;
+		__be16 dlen;
+	} s;
+};
+
+union otx2_cpt_iq_cmd_word3 {
+	u64 u;
+	struct {
+		u64 cptr:61;
+		u64 grp:3;
+	} s;
+};
+
+struct otx2_cpt_iq_command {
+	union otx2_cpt_iq_cmd_word0 cmd;
+	u64 dptr;
+	u64 rptr;
+	union otx2_cpt_iq_cmd_word3 cptr;
+};
+
+#endif /* __OTX2_CPT_REQMGR_H */

drivers/crypto/marvell/octeontx2/otx2_cptlf.h

@@ -4,9 +4,11 @@
 #ifndef __OTX2_CPTLF_H
 #define __OTX2_CPTLF_H
 
+#include <linux/soc/marvell/octeontx2/asm.h>
 #include <mbox.h>
 #include <rvu.h>
 #include "otx2_cpt_common.h"
+#include "otx2_cpt_reqmgr.h"
 
 /*
  * CPT instruction and pending queues user requested length in CPT_INST_S msgs
@@ -272,6 +274,66 @@ static inline void otx2_cptlf_enable_iqueues(struct otx2_cptlfs_info *lfs)
 	}
 }
 
+static inline void otx2_cpt_fill_inst(union otx2_cpt_inst_s *cptinst,
+				      struct otx2_cpt_iq_command *iq_cmd,
+				      u64 comp_baddr)
+{
+	cptinst->u[0] = 0x0;
+	cptinst->s.doneint = true;
+	cptinst->s.res_addr = comp_baddr;
+	cptinst->u[2] = 0x0;
+	cptinst->u[3] = 0x0;
+	cptinst->s.ei0 = iq_cmd->cmd.u;
+	cptinst->s.ei1 = iq_cmd->dptr;
+	cptinst->s.ei2 = iq_cmd->rptr;
+	cptinst->s.ei3 = iq_cmd->cptr.u;
+}
+
+/*
+ * On OcteonTX2 platform the parameter insts_num is used as a count of
+ * instructions to be enqueued. The valid values for insts_num are:
+ * 1 - 1 CPT instruction will be enqueued during LMTST operation
+ * 2 - 2 CPT instructions will be enqueued during LMTST operation
+ */
+static inline void otx2_cpt_send_cmd(union otx2_cpt_inst_s *cptinst,
+				     u32 insts_num, struct otx2_cptlf_info *lf)
+{
+	void __iomem *lmtline = lf->lmtline;
+	long ret;
+
+	/*
+	 * Make sure memory areas pointed in CPT_INST_S
+	 * are flushed before the instruction is sent to CPT
+	 */
+	dma_wmb();
+
+	do {
+		/* Copy CPT command to LMTLINE */
+		memcpy_toio(lmtline, cptinst, insts_num * OTX2_CPT_INST_SIZE);
+
+		/*
+		 * LDEOR initiates atomic transfer to I/O device
+		 * The following will cause the LMTST to fail (the LDEOR
+		 * returns zero):
+		 * - No stores have been performed to the LMTLINE since it was
+		 * last invalidated.
+		 * - The bytes which have been stored to LMTLINE since it was
+		 * last invalidated form a pattern that is non-contiguous, does
+		 * not start at byte 0, or does not end on a 8-byte boundary.
+		 * (i.e.comprises a formation of other than 1–16 8-byte
+		 * words.)
+		 *
+		 * These rules are designed such that an operating system
+		 * context switch or hypervisor guest switch need have no
+		 * knowledge of the LMTST operations; the switch code does not
+		 * need to store to LMTCANCEL. Also note as LMTLINE data cannot
+		 * be read, there is no information leakage between processes.
+		 */
+		ret = otx2_lmt_flush(lf->ioreg);
+
+	} while (!ret);
+}
+
 int otx2_cptlf_init(struct otx2_cptlfs_info *lfs, u8 eng_grp_msk, int pri,
 		    int lfs_num);
 void otx2_cptlf_shutdown(struct otx2_cptlfs_info *lfs);

drivers/crypto/marvell/octeontx2/otx2_cptpf.h

@@ -31,6 +31,9 @@ struct otx2_cptpf_dev {
 	struct otx2_cptvf_info vf[OTX2_CPT_MAX_VFS_NUM];
 	struct otx2_cpt_eng_grps eng_grps;/* Engine groups information */
 	struct otx2_cptlfs_info lfs;      /* CPT LFs attached to this PF */
+	/* HW capabilities for each engine type */
+	union otx2_cpt_eng_caps eng_caps[OTX2_CPT_MAX_ENG_TYPES];
+	bool is_eng_caps_discovered;
 
 	/* AF <=> PF mbox */
 	struct otx2_mbox	afpf_mbox;

drivers/crypto/marvell/octeontx2/otx2_cptpf_main.c

@@ -500,6 +500,11 @@ static int cptpf_sriov_enable(struct pci_dev *pdev, int num_vfs)
 	if (ret)
 		goto destroy_flr;
 
+	/* Get CPT HW capabilities using LOAD_FVC operation. */
+	ret = otx2_cpt_discover_eng_capabilities(cptpf);
+	if (ret)
+		goto disable_intr;
+
 	ret = otx2_cpt_create_eng_grps(cptpf->pdev, &cptpf->eng_grps);
 	if (ret)
 		goto disable_intr;

drivers/crypto/marvell/octeontx2/otx2_cptpf_mbox.c

@@ -5,6 +5,12 @@
 #include "otx2_cptpf.h"
 #include "rvu_reg.h"
 
+/*
+ * CPT PF driver version, It will be incremented by 1 for every feature
+ * addition in CPT mailbox messages.
+ */
+#define OTX2_CPT_PF_DRV_VERSION 0x1
+
 static int forward_to_af(struct otx2_cptpf_dev *cptpf,
 			 struct otx2_cptvf_info *vf,
 			 struct mbox_msghdr *req, int size)
@@ -35,6 +41,28 @@ static int forward_to_af(struct otx2_cptpf_dev *cptpf,
 	return 0;
 }
 
+static int handle_msg_get_caps(struct otx2_cptpf_dev *cptpf,
+			       struct otx2_cptvf_info *vf,
+			       struct mbox_msghdr *req)
+{
+	struct otx2_cpt_caps_rsp *rsp;
+
+	rsp = (struct otx2_cpt_caps_rsp *)
+	      otx2_mbox_alloc_msg(&cptpf->vfpf_mbox, vf->vf_id,
+				  sizeof(*rsp));
+	if (!rsp)
+		return -ENOMEM;
+
+	rsp->hdr.id = MBOX_MSG_GET_CAPS;
+	rsp->hdr.sig = OTX2_MBOX_RSP_SIG;
+	rsp->hdr.pcifunc = req->pcifunc;
+	rsp->cpt_pf_drv_version = OTX2_CPT_PF_DRV_VERSION;
+	rsp->cpt_revision = cptpf->pdev->revision;
+	memcpy(&rsp->eng_caps, &cptpf->eng_caps, sizeof(rsp->eng_caps));
+
+	return 0;
+}
+
 static int handle_msg_get_eng_grp_num(struct otx2_cptpf_dev *cptpf,
 				      struct otx2_cptvf_info *vf,
 				      struct mbox_msghdr *req)
@@ -72,6 +100,9 @@ static int cptpf_handle_vf_req(struct otx2_cptpf_dev *cptpf,
 	case MBOX_MSG_GET_ENG_GRP_NUM:
 		err = handle_msg_get_eng_grp_num(cptpf, vf, req);
 		break;
+	case MBOX_MSG_GET_CAPS:
+		err = handle_msg_get_caps(cptpf, vf, req);
+		break;
 	default:
 		err = forward_to_af(cptpf, vf, req, size);
 		break;

drivers/crypto/marvell/octeontx2/otx2_cptpf_ucode.c

@@ -6,6 +6,8 @@
 #include "otx2_cptpf_ucode.h"
 #include "otx2_cpt_common.h"
 #include "otx2_cptpf.h"
+#include "otx2_cptlf.h"
+#include "otx2_cpt_reqmgr.h"
 #include "rvu_reg.h"
 
 #define CSR_DELAY 30
@@ -1252,3 +1254,162 @@ int otx2_cpt_init_eng_grps(struct pci_dev *pdev,
 	otx2_cpt_cleanup_eng_grps(pdev, eng_grps);
 	return ret;
 }
+
+static int create_eng_caps_discovery_grps(struct pci_dev *pdev,
+					  struct otx2_cpt_eng_grps *eng_grps)
+{
+	struct otx2_cpt_uc_info_t *uc_info[OTX2_CPT_MAX_ETYPES_PER_GRP] = {  };
+	struct otx2_cpt_engines engs[OTX2_CPT_MAX_ETYPES_PER_GRP] = { {0} };
+	struct fw_info_t fw_info;
+	int ret;
+
+	ret = cpt_ucode_load_fw(pdev, &fw_info);
+	if (ret)
+		return ret;
+
+	uc_info[0] = get_ucode(&fw_info, OTX2_CPT_SE_TYPES);
+	if (uc_info[0] == NULL) {
+		dev_err(&pdev->dev, "Unable to find firmware for AE\n");
+		ret = -EINVAL;
+		goto release_fw;
+	}
+	engs[0].type = OTX2_CPT_AE_TYPES;
+	engs[0].count = 2;
+
+	ret = create_engine_group(&pdev->dev, eng_grps, engs, 1,
+				  (void **) uc_info, 0);
+	if (ret)
+		goto release_fw;
+
+	uc_info[0] = get_ucode(&fw_info, OTX2_CPT_SE_TYPES);
+	if (uc_info[0] == NULL) {
+		dev_err(&pdev->dev, "Unable to find firmware for SE\n");
+		ret = -EINVAL;
+		goto delete_eng_grp;
+	}
+	engs[0].type = OTX2_CPT_SE_TYPES;
+	engs[0].count = 2;
+
+	ret = create_engine_group(&pdev->dev, eng_grps, engs, 1,
+				  (void **) uc_info, 0);
+	if (ret)
+		goto delete_eng_grp;
+
+	uc_info[0] = get_ucode(&fw_info, OTX2_CPT_IE_TYPES);
+	if (uc_info[0] == NULL) {
+		dev_err(&pdev->dev, "Unable to find firmware for IE\n");
+		ret = -EINVAL;
+		goto delete_eng_grp;
+	}
+	engs[0].type = OTX2_CPT_IE_TYPES;
+	engs[0].count = 2;
+
+	ret = create_engine_group(&pdev->dev, eng_grps, engs, 1,
+				  (void **) uc_info, 0);
+	if (ret)
+		goto delete_eng_grp;
+
+	cpt_ucode_release_fw(&fw_info);
+	return 0;
+
+delete_eng_grp:
+	delete_engine_grps(pdev, eng_grps);
+release_fw:
+	cpt_ucode_release_fw(&fw_info);
+	return ret;
+}
+
+/*
+ * Get CPT HW capabilities using LOAD_FVC operation.
+ */
+int otx2_cpt_discover_eng_capabilities(struct otx2_cptpf_dev *cptpf)
+{
+	struct otx2_cptlfs_info *lfs = &cptpf->lfs;
+	struct otx2_cpt_iq_command iq_cmd;
+	union otx2_cpt_opcode opcode;
+	union otx2_cpt_res_s *result;
+	union otx2_cpt_inst_s inst;
+	dma_addr_t rptr_baddr;
+	struct pci_dev *pdev;
+	u32 len, compl_rlen;
+	int ret, etype;
+	void *rptr;
+
+	/*
+	 * We don't get capabilities if it was already done
+	 * (when user enabled VFs for the first time)
+	 */
+	if (cptpf->is_eng_caps_discovered)
+		return 0;
+
+	pdev = cptpf->pdev;
+	/*
+	 * Create engine groups for each type to submit LOAD_FVC op and
+	 * get engine's capabilities.
+	 */
+	ret = create_eng_caps_discovery_grps(pdev, &cptpf->eng_grps);
+	if (ret)
+		goto delete_grps;
+
+	lfs->pdev = pdev;
+	lfs->reg_base = cptpf->reg_base;
+	lfs->mbox = &cptpf->afpf_mbox;
+	ret = otx2_cptlf_init(&cptpf->lfs, OTX2_CPT_ALL_ENG_GRPS_MASK,
+			      OTX2_CPT_QUEUE_HI_PRIO, 1);
+	if (ret)
+		goto delete_grps;
+
+	compl_rlen = ALIGN(sizeof(union otx2_cpt_res_s), OTX2_CPT_DMA_MINALIGN);
+	len = compl_rlen + LOADFVC_RLEN;
+
+	result = kzalloc(len, GFP_KERNEL);
+	if (!result) {
+		ret = -ENOMEM;
+		goto lf_cleanup;
+	}
+	rptr_baddr = dma_map_single(&pdev->dev, (void *)result, len,
+				    DMA_BIDIRECTIONAL);
+	if (dma_mapping_error(&pdev->dev, rptr_baddr)) {
+		dev_err(&pdev->dev, "DMA mapping failed\n");
+		ret = -EFAULT;
+		goto free_result;
+	}
+	rptr = (u8 *)result + compl_rlen;
+
+	/* Fill in the command */
+	opcode.s.major = LOADFVC_MAJOR_OP;
+	opcode.s.minor = LOADFVC_MINOR_OP;
+
+	iq_cmd.cmd.u = 0;
+	iq_cmd.cmd.s.opcode = cpu_to_be16(opcode.flags);
+
+	/* 64-bit swap for microcode data reads, not needed for addresses */
+	cpu_to_be64s(&iq_cmd.cmd.u);
+	iq_cmd.dptr = 0;
+	iq_cmd.rptr = rptr_baddr + compl_rlen;
+	iq_cmd.cptr.u = 0;
+
+	for (etype = 1; etype < OTX2_CPT_MAX_ENG_TYPES; etype++) {
+		result->s.compcode = OTX2_CPT_COMPLETION_CODE_INIT;
+		iq_cmd.cptr.s.grp = otx2_cpt_get_eng_grp(&cptpf->eng_grps,
+							 etype);
+		otx2_cpt_fill_inst(&inst, &iq_cmd, rptr_baddr);
+		otx2_cpt_send_cmd(&inst, 1, &cptpf->lfs.lf[0]);
+
+		while (result->s.compcode == OTX2_CPT_COMPLETION_CODE_INIT)
+			cpu_relax();
+
+		cptpf->eng_caps[etype].u = be64_to_cpup(rptr);
+	}
+	dma_unmap_single(&pdev->dev, rptr_baddr, len, DMA_BIDIRECTIONAL);
+	cptpf->is_eng_caps_discovered = true;
+
+free_result:
+	kfree(result);
+lf_cleanup:
+	otx2_cptlf_shutdown(&cptpf->lfs);
+delete_grps:
+	delete_engine_grps(pdev, &cptpf->eng_grps);
+
+	return ret;
+}

drivers/crypto/marvell/octeontx2/otx2_cptpf_ucode.h

@@ -157,5 +157,6 @@ int otx2_cpt_create_eng_grps(struct pci_dev *pdev,
 			     struct otx2_cpt_eng_grps *eng_grps);
 int otx2_cpt_disable_all_cores(struct otx2_cptpf_dev *cptpf);
 int otx2_cpt_get_eng_grp(struct otx2_cpt_eng_grps *eng_grps, int eng_type);
+int otx2_cpt_discover_eng_capabilities(struct otx2_cptpf_dev *cptpf);
 
 #endif /* __OTX2_CPTPF_UCODE_H */