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Call cxl_dvsec_rr_decode() in the beginning of cxl_port_probe() and preserve the decoded information in a local 'struct cxl_endpoint_dvsec_info'. This info can be passed to various functions later on in order to support the HDM decoder emulation. The invocation of cxl_dvsec_rr_decode() in cxl_hdm_decode_init() is removed and a pointer to the 'struct cxl_endpoint_dvsec_info' is passed in. Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/167640367377.935665.2848747799651019676.stgit@dwillia2-xfh.jf.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
71 lines
2.4 KiB
C
71 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright(c) 2020 Intel Corporation. All rights reserved. */
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#ifndef __CXL_PCI_H__
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#define __CXL_PCI_H__
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#include <linux/pci.h>
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#include "cxl.h"
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#define CXL_MEMORY_PROGIF 0x10
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/*
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* See section 8.1 Configuration Space Registers in the CXL 2.0
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* Specification. Names are taken straight from the specification with "CXL" and
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* "DVSEC" redundancies removed. When obvious, abbreviations may be used.
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*/
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#define PCI_DVSEC_HEADER1_LENGTH_MASK GENMASK(31, 20)
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#define PCI_DVSEC_VENDOR_ID_CXL 0x1E98
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/* CXL 2.0 8.1.3: PCIe DVSEC for CXL Device */
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#define CXL_DVSEC_PCIE_DEVICE 0
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#define CXL_DVSEC_CAP_OFFSET 0xA
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#define CXL_DVSEC_MEM_CAPABLE BIT(2)
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#define CXL_DVSEC_HDM_COUNT_MASK GENMASK(5, 4)
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#define CXL_DVSEC_CTRL_OFFSET 0xC
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#define CXL_DVSEC_MEM_ENABLE BIT(2)
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#define CXL_DVSEC_RANGE_SIZE_HIGH(i) (0x18 + (i * 0x10))
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#define CXL_DVSEC_RANGE_SIZE_LOW(i) (0x1C + (i * 0x10))
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#define CXL_DVSEC_MEM_INFO_VALID BIT(0)
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#define CXL_DVSEC_MEM_ACTIVE BIT(1)
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#define CXL_DVSEC_MEM_SIZE_LOW_MASK GENMASK(31, 28)
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#define CXL_DVSEC_RANGE_BASE_HIGH(i) (0x20 + (i * 0x10))
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#define CXL_DVSEC_RANGE_BASE_LOW(i) (0x24 + (i * 0x10))
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#define CXL_DVSEC_MEM_BASE_LOW_MASK GENMASK(31, 28)
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/* CXL 2.0 8.1.4: Non-CXL Function Map DVSEC */
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#define CXL_DVSEC_FUNCTION_MAP 2
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/* CXL 2.0 8.1.5: CXL 2.0 Extensions DVSEC for Ports */
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#define CXL_DVSEC_PORT_EXTENSIONS 3
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/* CXL 2.0 8.1.6: GPF DVSEC for CXL Port */
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#define CXL_DVSEC_PORT_GPF 4
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/* CXL 2.0 8.1.7: GPF DVSEC for CXL Device */
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#define CXL_DVSEC_DEVICE_GPF 5
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/* CXL 2.0 8.1.8: PCIe DVSEC for Flex Bus Port */
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#define CXL_DVSEC_PCIE_FLEXBUS_PORT 7
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/* CXL 2.0 8.1.9: Register Locator DVSEC */
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#define CXL_DVSEC_REG_LOCATOR 8
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#define CXL_DVSEC_REG_LOCATOR_BLOCK1_OFFSET 0xC
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#define CXL_DVSEC_REG_LOCATOR_BIR_MASK GENMASK(2, 0)
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#define CXL_DVSEC_REG_LOCATOR_BLOCK_ID_MASK GENMASK(15, 8)
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#define CXL_DVSEC_REG_LOCATOR_BLOCK_OFF_LOW_MASK GENMASK(31, 16)
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/* Register Block Identifier (RBI) */
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enum cxl_regloc_type {
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CXL_REGLOC_RBI_EMPTY = 0,
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CXL_REGLOC_RBI_COMPONENT,
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CXL_REGLOC_RBI_VIRT,
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CXL_REGLOC_RBI_MEMDEV,
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CXL_REGLOC_RBI_TYPES
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};
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int devm_cxl_port_enumerate_dports(struct cxl_port *port);
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struct cxl_dev_state;
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int cxl_hdm_decode_init(struct cxl_dev_state *cxlds, struct cxl_hdm *cxlhdm,
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struct cxl_endpoint_dvsec_info *info);
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void read_cdat_data(struct cxl_port *port);
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#endif /* __CXL_PCI_H__ */
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