crypto: cavium/nitrox - Enabled Mailbox support

Enabled the PF->VF Mailbox support. Mailbox message are interpreted as {type, opcode, data}. Supported message types are REQ, ACK and NACK. Signed-off-by: Srikanth Jampala <Jampala.Srikanth@cavium.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
mariux64 · Dec 13, 2018 · cf718ea · cf718ea
1 parent 19c11c9
commit cf718ea
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Showing 11 changed files with 441 additions and 54 deletions.
diff --git a/drivers/crypto/cavium/nitrox/Makefile b/drivers/crypto/cavium/nitrox/Makefile
@@ -6,7 +6,8 @@ n5pf-objs := nitrox_main.o \
 	nitrox_lib.o \
 	nitrox_hal.o \
 	nitrox_reqmgr.o \
-	nitrox_algs.o
+	nitrox_algs.o	\
+	nitrox_mbx.o
 
 n5pf-$(CONFIG_PCI_IOV) += nitrox_sriov.o
 n5pf-$(CONFIG_DEBUG_FS) += nitrox_debugfs.o
diff --git a/drivers/crypto/cavium/nitrox/nitrox_csr.h b/drivers/crypto/cavium/nitrox/nitrox_csr.h
@@ -54,7 +54,13 @@
 #define NPS_STATS_PKT_DMA_WR_CNT	0x1000190
 
 /* NPS packet registers */
-#define NPS_PKT_INT				0x1040018
+#define NPS_PKT_INT			0x1040018
+#define NPS_PKT_MBOX_INT_LO		0x1040020
+#define NPS_PKT_MBOX_INT_LO_ENA_W1C	0x1040030
+#define NPS_PKT_MBOX_INT_LO_ENA_W1S	0x1040038
+#define NPS_PKT_MBOX_INT_HI		0x1040040
+#define NPS_PKT_MBOX_INT_HI_ENA_W1C	0x1040050
+#define NPS_PKT_MBOX_INT_HI_ENA_W1S	0x1040058
 #define NPS_PKT_IN_RERR_HI		0x1040108
 #define NPS_PKT_IN_RERR_HI_ENA_W1S	0x1040120
 #define NPS_PKT_IN_RERR_LO		0x1040128
@@ -74,6 +80,10 @@
 #define NPS_PKT_SLC_RERR_LO_ENA_W1S	0x1040240
 #define NPS_PKT_SLC_ERR_TYPE		0x1040248
 #define NPS_PKT_SLC_ERR_TYPE_ENA_W1S	0x1040260
+/* Mailbox PF->VF PF Accessible Data registers */
+#define NPS_PKT_MBOX_PF_VF_PFDATAX(_i)	(0x1040800 + ((_i) * 0x8))
+#define NPS_PKT_MBOX_VF_PF_PFDATAX(_i)	(0x1040C00 + ((_i) * 0x8))
+
 #define NPS_PKT_SLC_CTLX(_i)		(0x10000 + ((_i) * 0x40000))
 #define NPS_PKT_SLC_CNTSX(_i)		(0x10008 + ((_i) * 0x40000))
 #define NPS_PKT_SLC_INT_LEVELSX(_i)	(0x10010 + ((_i) * 0x40000))

diff --git a/drivers/crypto/cavium/nitrox/nitrox_debugfs.h b/drivers/crypto/cavium/nitrox/nitrox_debugfs.h
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0
+#ifndef __NITROX_DEBUGFS_H
+#define __NITROX_DEBUGFS_H
+
+#include "nitrox_dev.h"
+
+#ifdef CONFIG_DEBUG_FS
+int nitrox_debugfs_init(struct nitrox_device *ndev);
+void nitrox_debugfs_exit(struct nitrox_device *ndev);
+#else
+static inline int nitrox_debugfs_init(struct nitrox_device *ndev)
+{
+	return 0;
+}
+
+static inline int nitrox_sriov_debugfs_init(struct nitrox_device *ndev)
+{
+	return 0;
+}
+#endif /* !CONFIG_DEBUG_FS */
+
+#endif /* __NITROX_DEBUGFS_H */
diff --git a/drivers/crypto/cavium/nitrox/nitrox_dev.h b/drivers/crypto/cavium/nitrox/nitrox_dev.h
@@ -8,6 +8,8 @@
 #include <linux/if.h>
 
 #define VERSION_LEN 32
+/* Maximum queues in PF mode */
+#define MAX_PF_QUEUES	64
 
 /**
  * struct nitrox_cmdq - NITROX command queue
@@ -103,13 +105,58 @@ struct nitrox_q_vector {
 	};
 };
 
+/**
+ * mbox_msg - Mailbox message data
+ * @type: message type
+ * @opcode: message opcode
+ * @data: message data
+ */
+union mbox_msg {
+	u64 value;
+	struct {
+		u64 type: 2;
+		u64 opcode: 6;
+		u64 data: 58;
+	};
+	struct {
+		u64 type: 2;
+		u64 opcode: 6;
+		u64 chipid: 8;
+		u64 vfid: 8;
+	} id;
+};
+
+/**
+ * nitrox_vfdev - NITROX VF device instance in PF
+ * @state: VF device state
+ * @vfno: VF number
+ * @nr_queues: number of queues enabled in VF
+ * @ring: ring to communicate with VF
+ * @msg: Mailbox message data from VF
+ * @mbx_resp: Mailbox counters
+ */
+struct nitrox_vfdev {
+	atomic_t state;
+	int vfno;
+	int nr_queues;
+	int ring;
+	union mbox_msg msg;
+	atomic64_t mbx_resp;
+};
+
 /**
  * struct nitrox_iov - SR-IOV information
  * @num_vfs: number of VF(s) enabled
- * @msix: MSI-X for PF in SR-IOV case
+ * @max_vf_queues: Maximum number of queues allowed for VF
+ * @vfdev: VF(s) devices
+ * @pf2vf_wq: workqueue for PF2VF communication
+ * @msix: MSI-X entry for PF in SR-IOV case
  */
 struct nitrox_iov {
 	int num_vfs;
+	int max_vf_queues;
+	struct nitrox_vfdev *vfdev;
+	struct workqueue_struct *pf2vf_wq;
 	struct msix_entry msix;
 };
 
@@ -226,17 +273,9 @@ static inline bool nitrox_ready(struct nitrox_device *ndev)
 	return atomic_read(&ndev->state) == __NDEV_READY;
 }
 
-#ifdef CONFIG_DEBUG_FS
-int nitrox_debugfs_init(struct nitrox_device *ndev);
-void nitrox_debugfs_exit(struct nitrox_device *ndev);
-#else
-static inline int nitrox_debugfs_init(struct nitrox_device *ndev)
+static inline bool nitrox_vfdev_ready(struct nitrox_vfdev *vfdev)
 {
-	return 0;
+	return atomic_read(&vfdev->state) == __NDEV_READY;
 }
 
-static inline void nitrox_debugfs_exit(struct nitrox_device *ndev)
-{ }
-#endif
-
 #endif /* __NITROX_DEV_H */