crypto: ccp - Enable use of the additional CCP

A second CCP is available, identical to the first, with its ownn PCI ID. Make it available for use by the crypto subsystem, as well as for DMA activity and random number generation. This device is not pre-configured at at boot time. The driver must configure it (during the probe) for use. Signed-off-by: Gary R Hook <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
dtwlin · Aug 9, 2016 · e14e7d1 · e14e7d1
1 parent 99d90b2
commit e14e7d1
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Showing 3 changed files with 46 additions and 1 deletion.
diff --git a/drivers/crypto/ccp/ccp-dev-v5.c b/drivers/crypto/ccp/ccp-dev-v5.c
@@ -835,7 +835,7 @@ static int ccp5_init(struct ccp_device *ccp)
 	/* Register the DMA engine support */
 	ret = ccp_dmaengine_register(ccp);
 	if (ret)
-		goto e_hwrng;
+		goto e_kthread;
 
 	return 0;
 
@@ -952,6 +952,33 @@ static void ccp5_config(struct ccp_device *ccp)
 	iowrite32(0x00001249, ccp->io_regs + CMD5_REQID_CONFIG_OFFSET);
 }
 
+static void ccp5other_config(struct ccp_device *ccp)
+{
+	int i;
+	u32 rnd;
+
+	/* We own all of the queues on the NTB CCP */
+
+	iowrite32(0x00012D57, ccp->io_regs + CMD5_TRNG_CTL_OFFSET);
+	iowrite32(0x00000003, ccp->io_regs + CMD5_CONFIG_0_OFFSET);
+	for (i = 0; i < 12; i++) {
+		rnd = ioread32(ccp->io_regs + TRNG_OUT_REG);
+		iowrite32(rnd, ccp->io_regs + CMD5_AES_MASK_OFFSET);
+	}
+
+	iowrite32(0x0000001F, ccp->io_regs + CMD5_QUEUE_MASK_OFFSET);
+	iowrite32(0x00005B6D, ccp->io_regs + CMD5_QUEUE_PRIO_OFFSET);
+	iowrite32(0x00000000, ccp->io_regs + CMD5_CMD_TIMEOUT_OFFSET);
+
+	iowrite32(0x3FFFFFFF, ccp->io_regs + LSB_PRIVATE_MASK_LO_OFFSET);
+	iowrite32(0x000003FF, ccp->io_regs + LSB_PRIVATE_MASK_HI_OFFSET);
+
+	iowrite32(0x00108823, ccp->io_regs + CMD5_CLK_GATE_CTL_OFFSET);
+
+	ccp5_config(ccp);
+}
+
+/* Version 5 adds some function, but is essentially the same as v5 */
 static const struct ccp_actions ccp5_actions = {
 	.aes = ccp5_perform_aes,
 	.xts_aes = ccp5_perform_xts_aes,
@@ -974,3 +1001,11 @@ struct ccp_vdata ccpv5 = {
 	.bar = 2,
 	.offset = 0x0,
 };
+
+struct ccp_vdata ccpv5other = {
+	.version = CCP_VERSION(5, 0),
+	.setup = ccp5other_config,
+	.perform = &ccp5_actions,
+	.bar = 2,
+	.offset = 0x0,
+};
diff --git a/drivers/crypto/ccp/ccp-dev.h b/drivers/crypto/ccp/ccp-dev.h
@@ -63,7 +63,9 @@
 
 /* ------------------------ CCP Version 5 Specifics ------------------------ */
 #define CMD5_QUEUE_MASK_OFFSET		0x00
+#define	CMD5_QUEUE_PRIO_OFFSET		0x04
 #define CMD5_REQID_CONFIG_OFFSET	0x08
+#define	CMD5_CMD_TIMEOUT_OFFSET		0x10
 #define LSB_PUBLIC_MASK_LO_OFFSET	0x18
 #define LSB_PUBLIC_MASK_HI_OFFSET	0x1C
 #define LSB_PRIVATE_MASK_LO_OFFSET	0x20
@@ -83,6 +85,11 @@
 #define CMD5_Q_ABORT_BASE		0x0114
 #define CMD5_Q_AX_CACHE_BASE		0x0118
 
+#define	CMD5_CONFIG_0_OFFSET		0x6000
+#define	CMD5_TRNG_CTL_OFFSET		0x6008
+#define	CMD5_AES_MASK_OFFSET		0x6010
+#define	CMD5_CLK_GATE_CTL_OFFSET	0x603C
+
 /* Address offset between two virtual queue registers */
 #define CMD5_Q_STATUS_INCR		0x1000
 
@@ -634,5 +641,6 @@ struct ccp_vdata {
 
 extern	struct ccp_vdata ccpv3;
 extern	struct ccp_vdata ccpv5;
+extern	struct ccp_vdata ccpv5other;
 
 #endif
diff --git a/drivers/crypto/ccp/ccp-pci.c b/drivers/crypto/ccp/ccp-pci.c
@@ -232,6 +232,7 @@ static int ccp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 
 	if (ccp->vdata->setup)
 		ccp->vdata->setup(ccp);
+
 	ret = ccp->vdata->perform->init(ccp);
 	if (ret)
 		goto e_iomap;
@@ -325,6 +326,7 @@ static int ccp_pci_resume(struct pci_dev *pdev)
 static const struct pci_device_id ccp_pci_table[] = {
 	{ PCI_VDEVICE(AMD, 0x1537), (kernel_ulong_t)&ccpv3 },
 	{ PCI_VDEVICE(AMD, 0x1456), (kernel_ulong_t)&ccpv5 },
+	{ PCI_VDEVICE(AMD, 0x1468), (kernel_ulong_t)&ccpv5other },
 	/* Last entry must be zero */
 	{ 0, }
 };