crypto: ccp - move SEV vdata to a dedicated data structure

PSP can support both SEV and TEE interface. Therefore, move
SEV specific registers to a dedicated data structure.
TEE interface specific registers will be added in a later
patch.

Cc: Ard Biesheuvel <[e-mail]>
Cc: Tom Lendacky <[e-mail]>
Cc: Jens Wiklander <[e-mail]>
Co-developed-by: Devaraj Rangasamy <[e-mail]>
Signed-off-by: Devaraj Rangasamy <[e-mail]>
Signed-off-by: Rijo Thomas <[e-mail]>
Acked-by: Gary R Hook <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

drivers/crypto/ccp/sev-dev.c

···
 		return;
 
 	/* Check if it is SEV command completion: */
-	reg = ioread32(sev->io_regs + sev->psp->vdata->cmdresp_reg);
+	reg = ioread32(sev->io_regs + sev->vdata->cmdresp_reg);
 	if (reg & PSP_CMDRESP_RESP) {
 		sev->int_rcvd = 1;
 		wake_up(&sev->int_queue);
···
 	if (!ret)
 		return -ETIMEDOUT;
 
-	*reg = ioread32(sev->io_regs + sev->psp->vdata->cmdresp_reg);
+	*reg = ioread32(sev->io_regs + sev->vdata->cmdresp_reg);
 
 	return 0;
 }
···
 	print_hex_dump_debug("(in):  ", DUMP_PREFIX_OFFSET, 16, 2, data,
 			     sev_cmd_buffer_len(cmd), false);
 
-	iowrite32(phys_lsb, sev->io_regs + psp->vdata->cmdbuff_addr_lo_reg);
-	iowrite32(phys_msb, sev->io_regs + psp->vdata->cmdbuff_addr_hi_reg);
+	iowrite32(phys_lsb, sev->io_regs + sev->vdata->cmdbuff_addr_lo_reg);
+	iowrite32(phys_msb, sev->io_regs + sev->vdata->cmdbuff_addr_hi_reg);
 
 	sev->int_rcvd = 0;
 
 	reg = cmd;
 	reg <<= SEV_CMDRESP_CMD_SHIFT;
 	reg |= SEV_CMDRESP_IOC;
-	iowrite32(reg, sev->io_regs + psp->vdata->cmdresp_reg);
+	iowrite32(reg, sev->io_regs + sev->vdata->cmdresp_reg);
 
 	/* wait for command completion */
 	ret = sev_wait_cmd_ioc(sev, &reg, psp_timeout);
···
 	sev->psp = psp;
 
 	sev->io_regs = psp->io_regs;
+
+	sev->vdata = (struct sev_vdata *)psp->vdata->sev;
+	if (!sev->vdata) {
+		ret = -ENODEV;
+		dev_err(dev, "sev: missing driver data\n");
+		goto e_err;
+	}
 
 	psp_set_sev_irq_handler(psp, sev_irq_handler, sev);
 

drivers/crypto/ccp/sev-dev.h

···
 
 	void __iomem *io_regs;
 
+	struct sev_vdata *vdata;
+
 	int state;
 	unsigned int int_rcvd;
 	wait_queue_head_t int_queue;

drivers/crypto/ccp/sp-dev.h

···
 	const unsigned int rsamax;
 };
 
-struct psp_vdata {
+struct sev_vdata {
 	const unsigned int cmdresp_reg;
 	const unsigned int cmdbuff_addr_lo_reg;
 	const unsigned int cmdbuff_addr_hi_reg;
+};
+
+struct psp_vdata {
+	const struct sev_vdata *sev;
 	const unsigned int feature_reg;
 	const unsigned int inten_reg;
 	const unsigned int intsts_reg;

drivers/crypto/ccp/sp-pci.c

···
 #endif
 
 #ifdef CONFIG_CRYPTO_DEV_SP_PSP
-static const struct psp_vdata pspv1 = {
+static const struct sev_vdata sevv1 = {
 	.cmdresp_reg		= 0x10580,
 	.cmdbuff_addr_lo_reg	= 0x105e0,
 	.cmdbuff_addr_hi_reg	= 0x105e4,
+};
+
+static const struct sev_vdata sevv2 = {
+	.cmdresp_reg		= 0x10980,
+	.cmdbuff_addr_lo_reg	= 0x109e0,
+	.cmdbuff_addr_hi_reg	= 0x109e4,
+};
+
+static const struct psp_vdata pspv1 = {
+	.sev			= &sevv1,
 	.feature_reg		= 0x105fc,
 	.inten_reg		= 0x10610,
 	.intsts_reg		= 0x10614,
 };
 
 static const struct psp_vdata pspv2 = {
-	.cmdresp_reg		= 0x10980,
-	.cmdbuff_addr_lo_reg	= 0x109e0,
-	.cmdbuff_addr_hi_reg	= 0x109e4,
+	.sev			= &sevv2,
 	.feature_reg		= 0x109fc,
 	.inten_reg		= 0x10690,
 	.intsts_reg		= 0x10694,