habanalabs: move driver to accel subsystem

Now that we have a subsystem for compute accelerators, move the
habanalabs driver to it.

This patch only moves the files and fixes the Makefiles. Future
patches will change the existing code to register to the accel
subsystem and expose the accel device char files instead of the
habanalabs device char files.

Update the MAINTAINERS file to reflect this change.

Signed-off-by: Oded Gabbay <ogabbay@kernel.org>

1 files changed, 600 insertions, 0 deletions

diff --git a/drivers/accel/habanalabs/common/security.c b/drivers/accel/habanalabs/common/security.c
new file mode 100644
index 000000000000..6196c0487c8b
--- /dev/null
+++ b/drivers/accel/habanalabs/common/security.c
@@ -0,0 +1,600 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Copyright 2020 HabanaLabs, Ltd.
+ * All Rights Reserved.
+ */
+
+#include "habanalabs.h"
+
+/**
+ * hl_get_pb_block - return the relevant block within the block array
+ *
+ * @hdev: pointer to hl_device structure
+ * @mm_reg_addr: register address in the desired block
+ * @pb_blocks: blocks array
+ * @array_size: blocks array size
+ *
+ */
+static int hl_get_pb_block(struct hl_device *hdev, u32 mm_reg_addr,
+		const u32 pb_blocks[], int array_size)
+{
+	int i;
+	u32 start_addr, end_addr;
+
+	for (i = 0 ; i < array_size ; i++) {
+		start_addr = pb_blocks[i];
+		end_addr = start_addr + HL_BLOCK_SIZE;
+
+		if ((mm_reg_addr >= start_addr) && (mm_reg_addr < end_addr))
+			return i;
+	}
+
+	dev_err(hdev->dev, "No protection domain was found for 0x%x\n",
+			mm_reg_addr);
+	return -EDOM;
+}
+
+/**
+ * hl_unset_pb_in_block - clear a specific protection bit in a block
+ *
+ * @hdev: pointer to hl_device structure
+ * @reg_offset: register offset will be converted to bit offset in pb block
+ * @sgs_entry: pb array
+ *
+ */
+static int hl_unset_pb_in_block(struct hl_device *hdev, u32 reg_offset,
+				struct hl_block_glbl_sec *sgs_entry)
+{
+	if ((reg_offset >= HL_BLOCK_SIZE) || (reg_offset & 0x3)) {
+		dev_err(hdev->dev,
+			"Register offset(%d) is out of range(%d) or invalid\n",
+			reg_offset, HL_BLOCK_SIZE);
+		return -EINVAL;
+	}
+
+	UNSET_GLBL_SEC_BIT(sgs_entry->sec_array,
+			 (reg_offset & (HL_BLOCK_SIZE - 1)) >> 2);
+
+	return 0;
+}
+
+/**
+ * hl_unsecure_register - locate the relevant block for this register and
+ *                        remove corresponding protection bit
+ *
+ * @hdev: pointer to hl_device structure
+ * @mm_reg_addr: register address to unsecure
+ * @offset: additional offset to the register address
+ * @pb_blocks: blocks array
+ * @sgs_array: pb array
+ * @array_size: blocks array size
+ *
+ */
+int hl_unsecure_register(struct hl_device *hdev, u32 mm_reg_addr, int offset,
+		const u32 pb_blocks[], struct hl_block_glbl_sec sgs_array[],
+		int array_size)
+{
+	u32 reg_offset;
+	int block_num;
+
+	block_num = hl_get_pb_block(hdev, mm_reg_addr + offset, pb_blocks,
+			array_size);
+	if (block_num < 0)
+		return block_num;
+
+	reg_offset = (mm_reg_addr + offset) - pb_blocks[block_num];
+
+	return hl_unset_pb_in_block(hdev, reg_offset, &sgs_array[block_num]);
+}
+
+/**
+ * hl_unsecure_register_range - locate the relevant block for this register
+ *                              range and remove corresponding protection bit
+ *
+ * @hdev: pointer to hl_device structure
+ * @mm_reg_range: register address range to unsecure
+ * @offset: additional offset to the register address
+ * @pb_blocks: blocks array
+ * @sgs_array: pb array
+ * @array_size: blocks array size
+ *
+ */
+static int hl_unsecure_register_range(struct hl_device *hdev,
+		struct range mm_reg_range, int offset, const u32 pb_blocks[],
+		struct hl_block_glbl_sec sgs_array[],
+		int array_size)
+{
+	u32 reg_offset;
+	int i, block_num, rc = 0;
+
+	block_num = hl_get_pb_block(hdev,
+			mm_reg_range.start + offset, pb_blocks,
+			array_size);
+	if (block_num < 0)
+		return block_num;
+
+	for (i = mm_reg_range.start ; i <= mm_reg_range.end ; i += 4) {
+		reg_offset = (i + offset) - pb_blocks[block_num];
+		rc |= hl_unset_pb_in_block(hdev, reg_offset,
+					&sgs_array[block_num]);
+	}
+
+	return rc;
+}
+
+/**
+ * hl_unsecure_registers - locate the relevant block for all registers and
+ *                        remove corresponding protection bit
+ *
+ * @hdev: pointer to hl_device structure
+ * @mm_reg_array: register address array to unsecure
+ * @mm_array_size: register array size
+ * @offset: additional offset to the register address
+ * @pb_blocks: blocks array
+ * @sgs_array: pb array
+ * @blocks_array_size: blocks array size
+ *
+ */
+int hl_unsecure_registers(struct hl_device *hdev, const u32 mm_reg_array[],
+		int mm_array_size, int offset, const u32 pb_blocks[],
+		struct hl_block_glbl_sec sgs_array[], int blocks_array_size)
+{
+	int i, rc = 0;
+
+	for (i = 0 ; i < mm_array_size ; i++) {
+		rc = hl_unsecure_register(hdev, mm_reg_array[i], offset,
+				pb_blocks, sgs_array, blocks_array_size);
+
+		if (rc)
+			return rc;
+	}
+
+	return rc;
+}
+
+/**
+ * hl_unsecure_registers_range - locate the relevant block for all register
+ *                        ranges and remove corresponding protection bit
+ *
+ * @hdev: pointer to hl_device structure
+ * @mm_reg_range_array: register address range array to unsecure
+ * @mm_array_size: register array size
+ * @offset: additional offset to the register address
+ * @pb_blocks: blocks array
+ * @sgs_array: pb array
+ * @blocks_array_size: blocks array size
+ *
+ */
+static int hl_unsecure_registers_range(struct hl_device *hdev,
+		const struct range mm_reg_range_array[], int mm_array_size,
+		int offset, const u32 pb_blocks[],
+		struct hl_block_glbl_sec sgs_array[], int blocks_array_size)
+{
+	int i, rc = 0;
+
+	for (i = 0 ; i < mm_array_size ; i++) {
+		rc = hl_unsecure_register_range(hdev, mm_reg_range_array[i],
+			offset, pb_blocks, sgs_array, blocks_array_size);
+
+		if (rc)
+			return rc;
+	}
+
+	return rc;
+}
+
+/**
+ * hl_ack_pb_security_violations - Ack security violation
+ *
+ * @hdev: pointer to hl_device structure
+ * @pb_blocks: blocks array
+ * @block_offset: additional offset to the block
+ * @array_size: blocks array size
+ *
+ */
+static void hl_ack_pb_security_violations(struct hl_device *hdev,
+		const u32 pb_blocks[], u32 block_offset, int array_size)
+{
+	int i;
+	u32 cause, addr, block_base;
+
+	for (i = 0 ; i < array_size ; i++) {
+		block_base = pb_blocks[i] + block_offset;
+		cause = RREG32(block_base + HL_BLOCK_GLBL_ERR_CAUSE);
+		if (cause) {
+			addr = RREG32(block_base + HL_BLOCK_GLBL_ERR_ADDR);
+			hdev->asic_funcs->pb_print_security_errors(hdev,
+					block_base, cause, addr);
+			WREG32(block_base + HL_BLOCK_GLBL_ERR_CAUSE, cause);
+		}
+	}
+}
+
+/**
+ * hl_config_glbl_sec - set pb in HW according to given pb array
+ *
+ * @hdev: pointer to hl_device structure
+ * @pb_blocks: blocks array
+ * @sgs_array: pb array
+ * @block_offset: additional offset to the block
+ * @array_size: blocks array size
+ *
+ */
+void hl_config_glbl_sec(struct hl_device *hdev, const u32 pb_blocks[],
+		struct hl_block_glbl_sec sgs_array[], u32 block_offset,
+		int array_size)
+{
+	int i, j;
+	u32 sgs_base;
+
+	if (hdev->pldm)
+		usleep_range(100, 1000);
+
+	for (i = 0 ; i < array_size ; i++) {
+		sgs_base = block_offset + pb_blocks[i] +
+				HL_BLOCK_GLBL_SEC_OFFS;
+
+		for (j = 0 ; j < HL_BLOCK_GLBL_SEC_LEN ; j++)
+			WREG32(sgs_base + j * sizeof(u32),
+				sgs_array[i].sec_array[j]);
+	}
+}
+
+/**
+ * hl_secure_block - locally memsets a block to 0
+ *
+ * @hdev: pointer to hl_device structure
+ * @sgs_array: pb array to clear
+ * @array_size: blocks array size
+ *
+ */
+void hl_secure_block(struct hl_device *hdev,
+		struct hl_block_glbl_sec sgs_array[], int array_size)
+{
+	int i;
+
+	for (i = 0 ; i < array_size ; i++)
+		memset((char *)(sgs_array[i].sec_array), 0,
+			HL_BLOCK_GLBL_SEC_SIZE);
+}
+
+/**
+ * hl_init_pb_with_mask - set selected pb instances with mask in HW according
+ *                        to given configuration
+ *
+ * @hdev: pointer to hl_device structure
+ * @num_dcores: number of decores to apply configuration to
+ *              set to HL_PB_SHARED if need to apply only once
+ * @dcore_offset: offset between dcores
+ * @num_instances: number of instances to apply configuration to
+ * @instance_offset: offset between instances
+ * @pb_blocks: blocks array
+ * @blocks_array_size: blocks array size
+ * @regs_array: register array
+ * @regs_array_size: register array size
+ * @mask: enabled instances mask: 1- enabled, 0- disabled
+ */
+int hl_init_pb_with_mask(struct hl_device *hdev, u32 num_dcores,
+		u32 dcore_offset, u32 num_instances, u32 instance_offset,
+		const u32 pb_blocks[], u32 blocks_array_size,
+		const u32 *regs_array, u32 regs_array_size, u64 mask)
+{
+	int i, j;
+	struct hl_block_glbl_sec *glbl_sec;
+
+	glbl_sec = kcalloc(blocks_array_size,
+			sizeof(struct hl_block_glbl_sec),
+			GFP_KERNEL);
+	if (!glbl_sec)
+		return -ENOMEM;
+
+	hl_secure_block(hdev, glbl_sec, blocks_array_size);
+	hl_unsecure_registers(hdev, regs_array, regs_array_size, 0, pb_blocks,
+			glbl_sec, blocks_array_size);
+
+	/* Fill all blocks with the same configuration */
+	for (i = 0 ; i < num_dcores ; i++) {
+		for (j = 0 ; j < num_instances ; j++) {
+			int seq = i * num_instances + j;
+
+			if (!(mask & BIT_ULL(seq)))
+				continue;
+
+			hl_config_glbl_sec(hdev, pb_blocks, glbl_sec,
+					i * dcore_offset + j * instance_offset,
+					blocks_array_size);
+		}
+	}
+
+	kfree(glbl_sec);
+
+	return 0;
+}
+
+/**
+ * hl_init_pb - set pb in HW according to given configuration
+ *
+ * @hdev: pointer to hl_device structure
+ * @num_dcores: number of decores to apply configuration to
+ *              set to HL_PB_SHARED if need to apply only once
+ * @dcore_offset: offset between dcores
+ * @num_instances: number of instances to apply configuration to
+ * @instance_offset: offset between instances
+ * @pb_blocks: blocks array
+ * @blocks_array_size: blocks array size
+ * @regs_array: register array
+ * @regs_array_size: register array size
+ *
+ */
+int hl_init_pb(struct hl_device *hdev, u32 num_dcores, u32 dcore_offset,
+		u32 num_instances, u32 instance_offset,
+		const u32 pb_blocks[], u32 blocks_array_size,
+		const u32 *regs_array, u32 regs_array_size)
+{
+	return hl_init_pb_with_mask(hdev, num_dcores, dcore_offset,
+			num_instances, instance_offset, pb_blocks,
+			blocks_array_size, regs_array, regs_array_size,
+			ULLONG_MAX);
+}
+
+/**
+ * hl_init_pb_ranges_with_mask - set pb instances using mask in HW according to
+ *                               given configuration unsecurring registers
+ *                               ranges instead of specific registers
+ *
+ * @hdev: pointer to hl_device structure
+ * @num_dcores: number of decores to apply configuration to
+ *              set to HL_PB_SHARED if need to apply only once
+ * @dcore_offset: offset between dcores
+ * @num_instances: number of instances to apply configuration to
+ * @instance_offset: offset between instances
+ * @pb_blocks: blocks array
+ * @blocks_array_size: blocks array size
+ * @regs_range_array: register range array
+ * @regs_range_array_size: register range array size
+ * @mask: enabled instances mask: 1- enabled, 0- disabled
+ */
+int hl_init_pb_ranges_with_mask(struct hl_device *hdev, u32 num_dcores,
+		u32 dcore_offset, u32 num_instances, u32 instance_offset,
+		const u32 pb_blocks[], u32 blocks_array_size,
+		const struct range *regs_range_array, u32 regs_range_array_size,
+		u64 mask)
+{
+	int i, j, rc = 0;
+	struct hl_block_glbl_sec *glbl_sec;
+
+	glbl_sec = kcalloc(blocks_array_size,
+			sizeof(struct hl_block_glbl_sec),
+			GFP_KERNEL);
+	if (!glbl_sec)
+		return -ENOMEM;
+
+	hl_secure_block(hdev, glbl_sec, blocks_array_size);
+	rc = hl_unsecure_registers_range(hdev, regs_range_array,
+			regs_range_array_size, 0, pb_blocks, glbl_sec,
+			blocks_array_size);
+	if (rc)
+		goto free_glbl_sec;
+
+	/* Fill all blocks with the same configuration */
+	for (i = 0 ; i < num_dcores ; i++) {
+		for (j = 0 ; j < num_instances ; j++) {
+			int seq = i * num_instances + j;
+
+			if (!(mask & BIT_ULL(seq)))
+				continue;
+
+			hl_config_glbl_sec(hdev, pb_blocks, glbl_sec,
+					i * dcore_offset + j * instance_offset,
+					blocks_array_size);
+		}
+	}
+
+free_glbl_sec:
+	kfree(glbl_sec);
+
+	return rc;
+}
+
+/**
+ * hl_init_pb_ranges - set pb in HW according to given configuration unsecurring
+ *                     registers ranges instead of specific registers
+ *
+ * @hdev: pointer to hl_device structure
+ * @num_dcores: number of decores to apply configuration to
+ *              set to HL_PB_SHARED if need to apply only once
+ * @dcore_offset: offset between dcores
+ * @num_instances: number of instances to apply configuration to
+ * @instance_offset: offset between instances
+ * @pb_blocks: blocks array
+ * @blocks_array_size: blocks array size
+ * @regs_range_array: register range array
+ * @regs_range_array_size: register range array size
+ *
+ */
+int hl_init_pb_ranges(struct hl_device *hdev, u32 num_dcores,
+		u32 dcore_offset, u32 num_instances, u32 instance_offset,
+		const u32 pb_blocks[], u32 blocks_array_size,
+		const struct range *regs_range_array, u32 regs_range_array_size)
+{
+	return hl_init_pb_ranges_with_mask(hdev, num_dcores, dcore_offset,
+			num_instances, instance_offset, pb_blocks,
+			blocks_array_size, regs_range_array,
+			regs_range_array_size, ULLONG_MAX);
+}
+
+/**
+ * hl_init_pb_single_dcore - set pb for a single docre in HW
+ * according to given configuration
+ *
+ * @hdev: pointer to hl_device structure
+ * @dcore_offset: offset from the dcore0
+ * @num_instances: number of instances to apply configuration to
+ * @instance_offset: offset between instances
+ * @pb_blocks: blocks array
+ * @blocks_array_size: blocks array size
+ * @regs_array: register array
+ * @regs_array_size: register array size
+ *
+ */
+int hl_init_pb_single_dcore(struct hl_device *hdev, u32 dcore_offset,
+		u32 num_instances, u32 instance_offset,
+		const u32 pb_blocks[], u32 blocks_array_size,
+		const u32 *regs_array, u32 regs_array_size)
+{
+	int i, rc = 0;
+	struct hl_block_glbl_sec *glbl_sec;
+
+	glbl_sec = kcalloc(blocks_array_size,
+			sizeof(struct hl_block_glbl_sec),
+			GFP_KERNEL);
+	if (!glbl_sec)
+		return -ENOMEM;
+
+	hl_secure_block(hdev, glbl_sec, blocks_array_size);
+	rc = hl_unsecure_registers(hdev, regs_array, regs_array_size, 0,
+			pb_blocks, glbl_sec, blocks_array_size);
+	if (rc)
+		goto free_glbl_sec;
+
+	/* Fill all blocks with the same configuration */
+	for (i = 0 ; i < num_instances ; i++)
+		hl_config_glbl_sec(hdev, pb_blocks, glbl_sec,
+				dcore_offset + i * instance_offset,
+				blocks_array_size);
+
+free_glbl_sec:
+	kfree(glbl_sec);
+
+	return rc;
+}
+
+/**
+ * hl_init_pb_ranges_single_dcore - set pb for a single docre in HW according
+ *                                  to given configuration unsecurring
+ *                                  registers ranges instead of specific
+ *                                  registers
+ *
+ * @hdev: pointer to hl_device structure
+ * @dcore_offset: offset from the dcore0
+ * @num_instances: number of instances to apply configuration to
+ * @instance_offset: offset between instances
+ * @pb_blocks: blocks array
+ * @blocks_array_size: blocks array size
+ * @regs_range_array: register range array
+ * @regs_range_array_size: register range array size
+ *
+ */
+int hl_init_pb_ranges_single_dcore(struct hl_device *hdev, u32 dcore_offset,
+		u32 num_instances, u32 instance_offset,
+		const u32 pb_blocks[], u32 blocks_array_size,
+		const struct range *regs_range_array, u32 regs_range_array_size)
+{
+	int i;
+	struct hl_block_glbl_sec *glbl_sec;
+
+	glbl_sec = kcalloc(blocks_array_size,
+			sizeof(struct hl_block_glbl_sec),
+			GFP_KERNEL);
+	if (!glbl_sec)
+		return -ENOMEM;
+
+	hl_secure_block(hdev, glbl_sec, blocks_array_size);
+	hl_unsecure_registers_range(hdev, regs_range_array,
+			regs_range_array_size, 0, pb_blocks, glbl_sec,
+			blocks_array_size);
+
+	/* Fill all blocks with the same configuration */
+	for (i = 0 ; i < num_instances ; i++)
+		hl_config_glbl_sec(hdev, pb_blocks, glbl_sec,
+				dcore_offset + i * instance_offset,
+				blocks_array_size);
+
+	kfree(glbl_sec);
+
+	return 0;
+}
+
+/**
+ * hl_ack_pb_with_mask - ack pb with mask in HW according to given configuration
+ *
+ * @hdev: pointer to hl_device structure
+ * @num_dcores: number of decores to apply configuration to
+ *              set to HL_PB_SHARED if need to apply only once
+ * @dcore_offset: offset between dcores
+ * @num_instances: number of instances to apply configuration to
+ * @instance_offset: offset between instances
+ * @pb_blocks: blocks array
+ * @blocks_array_size: blocks array size
+ * @mask: enabled instances mask: 1- enabled, 0- disabled
+ *
+ */
+void hl_ack_pb_with_mask(struct hl_device *hdev, u32 num_dcores,
+		u32 dcore_offset, u32 num_instances, u32 instance_offset,
+		const u32 pb_blocks[], u32 blocks_array_size, u64 mask)
+{
+	int i, j;
+
+	/* ack all blocks */
+	for (i = 0 ; i < num_dcores ; i++) {
+		for (j = 0 ; j < num_instances ; j++) {
+			int seq = i * num_instances + j;
+
+			if (!(mask & BIT_ULL(seq)))
+				continue;
+
+			hl_ack_pb_security_violations(hdev, pb_blocks,
+					i * dcore_offset + j * instance_offset,
+					blocks_array_size);
+		}
+	}
+}
+
+/**
+ * hl_ack_pb - ack pb in HW according to given configuration
+ *
+ * @hdev: pointer to hl_device structure
+ * @num_dcores: number of decores to apply configuration to
+ *              set to HL_PB_SHARED if need to apply only once
+ * @dcore_offset: offset between dcores
+ * @num_instances: number of instances to apply configuration to
+ * @instance_offset: offset between instances
+ * @pb_blocks: blocks array
+ * @blocks_array_size: blocks array size
+ *
+ */
+void hl_ack_pb(struct hl_device *hdev, u32 num_dcores, u32 dcore_offset,
+		u32 num_instances, u32 instance_offset,
+		const u32 pb_blocks[], u32 blocks_array_size)
+{
+	hl_ack_pb_with_mask(hdev, num_dcores, dcore_offset, num_instances,
+			instance_offset, pb_blocks, blocks_array_size,
+			ULLONG_MAX);
+}
+
+/**
+ * hl_ack_pb_single_dcore - ack pb for single docre in HW
+ * according to given configuration
+ *
+ * @hdev: pointer to hl_device structure
+ * @dcore_offset: offset from dcore0
+ * @num_instances: number of instances to apply configuration to
+ * @instance_offset: offset between instances
+ * @pb_blocks: blocks array
+ * @blocks_array_size: blocks array size
+ *
+ */
+void hl_ack_pb_single_dcore(struct hl_device *hdev, u32 dcore_offset,
+		u32 num_instances, u32 instance_offset,
+		const u32 pb_blocks[], u32 blocks_array_size)
+{
+	int i;
+
+	/* ack all blocks */
+	for (i = 0 ; i < num_instances ; i++)
+		hl_ack_pb_security_violations(hdev, pb_blocks,
+				dcore_offset + i * instance_offset,
+				blocks_array_size);
+
+}