Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 126 insertions, 0 deletions

diff --git a/drivers/thunderbolt/nhi_regs.h b/drivers/thunderbolt/nhi_regs.h
new file mode 100644
index 000000000..b3e49d19c
--- /dev/null
+++ b/drivers/thunderbolt/nhi_regs.h
@@ -0,0 +1,126 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Thunderbolt driver - NHI registers
+ *
+ * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
+ */
+
+#ifndef NHI_REGS_H_
+#define NHI_REGS_H_
+
+#include <linux/types.h>
+
+enum ring_flags {
+	RING_FLAG_ISOCH_ENABLE = 1 << 27, /* TX only? */
+	RING_FLAG_E2E_FLOW_CONTROL = 1 << 28,
+	RING_FLAG_PCI_NO_SNOOP = 1 << 29,
+	RING_FLAG_RAW = 1 << 30, /* ignore EOF/SOF mask, include checksum */
+	RING_FLAG_ENABLE = 1 << 31,
+};
+
+/**
+ * struct ring_desc - TX/RX ring entry
+ *
+ * For TX set length/eof/sof.
+ * For RX length/eof/sof are set by the NHI.
+ */
+struct ring_desc {
+	u64 phys;
+	u32 length:12;
+	u32 eof:4;
+	u32 sof:4;
+	enum ring_desc_flags flags:12;
+	u32 time; /* write zero */
+} __packed;
+
+/* NHI registers in bar 0 */
+
+/*
+ * 16 bytes per entry, one entry for every hop (REG_HOP_COUNT)
+ * 00: physical pointer to an array of struct ring_desc
+ * 08: ring tail (set by NHI)
+ * 10: ring head (index of first non posted descriptor)
+ * 12: descriptor count
+ */
+#define REG_TX_RING_BASE	0x00000
+
+/*
+ * 16 bytes per entry, one entry for every hop (REG_HOP_COUNT)
+ * 00: physical pointer to an array of struct ring_desc
+ * 08: ring head (index of first not posted descriptor)
+ * 10: ring tail (set by NHI)
+ * 12: descriptor count
+ * 14: max frame sizes (anything larger than 0x100 has no effect)
+ */
+#define REG_RX_RING_BASE	0x08000
+
+/*
+ * 32 bytes per entry, one entry for every hop (REG_HOP_COUNT)
+ * 00: enum_ring_flags
+ * 04: isoch time stamp ?? (write 0)
+ * ..: unknown
+ */
+#define REG_TX_OPTIONS_BASE	0x19800
+
+/*
+ * 32 bytes per entry, one entry for every hop (REG_HOP_COUNT)
+ * 00: enum ring_flags
+ *     If RING_FLAG_E2E_FLOW_CONTROL is set then bits 13-23 must be set to
+ *     the corresponding TX hop id.
+ * 04: EOF/SOF mask (ignored for RING_FLAG_RAW rings)
+ * ..: unknown
+ */
+#define REG_RX_OPTIONS_BASE	0x29800
+#define REG_RX_OPTIONS_E2E_HOP_MASK	GENMASK(22, 12)
+#define REG_RX_OPTIONS_E2E_HOP_SHIFT	12
+
+/*
+ * three bitfields: tx, rx, rx overflow
+ * Every bitfield contains one bit for every hop (REG_HOP_COUNT). Registers are
+ * cleared on read. New interrupts are fired only after ALL registers have been
+ * read (even those containing only disabled rings).
+ */
+#define REG_RING_NOTIFY_BASE	0x37800
+#define RING_NOTIFY_REG_COUNT(nhi) ((31 + 3 * nhi->hop_count) / 32)
+
+/*
+ * two bitfields: rx, tx
+ * Both bitfields contains one bit for every hop (REG_HOP_COUNT). To
+ * enable/disable interrupts set/clear the corresponding bits.
+ */
+#define REG_RING_INTERRUPT_BASE	0x38200
+#define RING_INTERRUPT_REG_COUNT(nhi) ((31 + 2 * nhi->hop_count) / 32)
+
+#define REG_INT_THROTTLING_RATE	0x38c00
+
+/* Interrupt Vector Allocation */
+#define REG_INT_VEC_ALLOC_BASE	0x38c40
+#define REG_INT_VEC_ALLOC_BITS	4
+#define REG_INT_VEC_ALLOC_MASK	GENMASK(3, 0)
+#define REG_INT_VEC_ALLOC_REGS	(32 / REG_INT_VEC_ALLOC_BITS)
+
+/* The last 11 bits contain the number of hops supported by the NHI port. */
+#define REG_HOP_COUNT		0x39640
+
+#define REG_DMA_MISC			0x39864
+#define REG_DMA_MISC_INT_AUTO_CLEAR     BIT(2)
+
+#define REG_INMAIL_DATA			0x39900
+
+#define REG_INMAIL_CMD			0x39904
+#define REG_INMAIL_CMD_MASK		GENMASK(7, 0)
+#define REG_INMAIL_ERROR		BIT(30)
+#define REG_INMAIL_OP_REQUEST		BIT(31)
+
+#define REG_OUTMAIL_CMD			0x3990c
+#define REG_OUTMAIL_CMD_OPMODE_SHIFT	8
+#define REG_OUTMAIL_CMD_OPMODE_MASK	GENMASK(11, 8)
+
+#define REG_FW_STS			0x39944
+#define REG_FW_STS_NVM_AUTH_DONE	BIT(31)
+#define REG_FW_STS_CIO_RESET_REQ	BIT(30)
+#define REG_FW_STS_ICM_EN_CPU		BIT(2)
+#define REG_FW_STS_ICM_EN_INVERT	BIT(1)
+#define REG_FW_STS_ICM_EN		BIT(0)
+
+#endif