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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b4a304489e
Add support for arbitrary bus address offset. Previously we ignored the child (PCI) address in the "ranges" property and assumed it was always zero. That means every host bridge window mapped to PCI bus address zero, e.g., pci_bus 0000:00: root bus resource [mem 0x2000000000000-0x200007fffffff] (bus address [0x00000000-0x7fffffff]) But some systems have host bridge windows with non-zero child addresses, so parse the child address and compute the offset between the parent (CPU) and child (PCI) addresses. This allows windows like these: /pci@305: PCI MEM [mem 0x2000000100000-0x200007effffff] offset 2000000000000 pci_sun4v f02ae7f8: PCI host bridge to bus 0000:00 pci_bus 0000:00: root bus resource [mem 0x2000000100000-0x200007effffff] (bus address [0x00100000-0x7effffff]) [bhelgaas: changelog] Tested-by: Khalid Aziz <khalid.aziz@oracle.com> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: David S. Miller <davem@davemloft.net> Cc: sparclinux@vger.kernel.org
193 lines
5.4 KiB
C
193 lines
5.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* pci_impl.h: Helper definitions for PCI controller support.
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*
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* Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net)
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*/
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#ifndef PCI_IMPL_H
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#define PCI_IMPL_H
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#include <linux/types.h>
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#include <linux/spinlock.h>
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#include <linux/pci.h>
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#include <linux/msi.h>
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#include <linux/of_device.h>
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#include <asm/io.h>
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#include <asm/prom.h>
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#include <asm/iommu.h>
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/* The abstraction used here is that there are PCI controllers,
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* each with one (Sabre) or two (PSYCHO/SCHIZO) PCI bus modules
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* underneath. Each PCI bus module uses an IOMMU (shared by both
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* PBMs of a controller, or per-PBM), and if a streaming buffer
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* is present, each PCI bus module has it's own. (ie. the IOMMU
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* might be shared between PBMs, the STC is never shared)
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* Furthermore, each PCI bus module controls it's own autonomous
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* PCI bus.
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*/
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#define PCI_STC_FLUSHFLAG_INIT(STC) \
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(*((STC)->strbuf_flushflag) = 0UL)
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#define PCI_STC_FLUSHFLAG_SET(STC) \
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(*((STC)->strbuf_flushflag) != 0UL)
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#ifdef CONFIG_PCI_MSI
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struct pci_pbm_info;
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struct sparc64_msiq_ops {
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int (*get_head)(struct pci_pbm_info *pbm, unsigned long msiqid,
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unsigned long *head);
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int (*dequeue_msi)(struct pci_pbm_info *pbm, unsigned long msiqid,
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unsigned long *head, unsigned long *msi);
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int (*set_head)(struct pci_pbm_info *pbm, unsigned long msiqid,
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unsigned long head);
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int (*msi_setup)(struct pci_pbm_info *pbm, unsigned long msiqid,
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unsigned long msi, int is_msi64);
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int (*msi_teardown)(struct pci_pbm_info *pbm, unsigned long msi);
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int (*msiq_alloc)(struct pci_pbm_info *pbm);
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void (*msiq_free)(struct pci_pbm_info *pbm);
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int (*msiq_build_irq)(struct pci_pbm_info *pbm, unsigned long msiqid,
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unsigned long devino);
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};
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void sparc64_pbm_msi_init(struct pci_pbm_info *pbm,
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const struct sparc64_msiq_ops *ops);
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struct sparc64_msiq_cookie {
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struct pci_pbm_info *pbm;
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unsigned long msiqid;
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};
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#endif
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struct pci_pbm_info {
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struct pci_pbm_info *next;
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struct pci_pbm_info *sibling;
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int index;
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/* Physical address base of controller registers. */
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unsigned long controller_regs;
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/* Physical address base of PBM registers. */
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unsigned long pbm_regs;
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/* Physical address of DMA sync register, if any. */
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unsigned long sync_reg;
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/* Opaque 32-bit system bus Port ID. */
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u32 portid;
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/* Opaque 32-bit handle used for hypervisor calls. */
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u32 devhandle;
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/* Chipset version information. */
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int chip_type;
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#define PBM_CHIP_TYPE_SABRE 1
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#define PBM_CHIP_TYPE_PSYCHO 2
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#define PBM_CHIP_TYPE_SCHIZO 3
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#define PBM_CHIP_TYPE_SCHIZO_PLUS 4
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#define PBM_CHIP_TYPE_TOMATILLO 5
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int chip_version;
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int chip_revision;
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/* Name used for top-level resources. */
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const char *name;
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/* OBP specific information. */
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struct platform_device *op;
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u64 ino_bitmap;
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/* PBM I/O and Memory space resources. */
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struct resource io_space;
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struct resource mem_space;
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struct resource mem64_space;
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struct resource busn;
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/* offset */
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resource_size_t io_offset;
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resource_size_t mem_offset;
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resource_size_t mem64_offset;
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/* Base of PCI Config space, can be per-PBM or shared. */
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unsigned long config_space;
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/* This will be 12 on PCI-E controllers, 8 elsewhere. */
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unsigned long config_space_reg_bits;
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unsigned long pci_afsr;
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unsigned long pci_afar;
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unsigned long pci_csr;
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/* State of 66MHz capabilities on this PBM. */
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int is_66mhz_capable;
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int all_devs_66mhz;
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#ifdef CONFIG_PCI_MSI
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/* MSI info. */
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u32 msiq_num;
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u32 msiq_ent_count;
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u32 msiq_first;
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u32 msiq_first_devino;
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u32 msiq_rotor;
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struct sparc64_msiq_cookie *msiq_irq_cookies;
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u32 msi_num;
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u32 msi_first;
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u32 msi_data_mask;
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u32 msix_data_width;
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u64 msi32_start;
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u64 msi64_start;
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u32 msi32_len;
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u32 msi64_len;
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void *msi_queues;
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unsigned long *msi_bitmap;
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unsigned int *msi_irq_table;
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int (*setup_msi_irq)(unsigned int *irq_p, struct pci_dev *pdev,
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struct msi_desc *entry);
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void (*teardown_msi_irq)(unsigned int irq, struct pci_dev *pdev);
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const struct sparc64_msiq_ops *msi_ops;
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#endif /* !(CONFIG_PCI_MSI) */
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/* This PBM's streaming buffer. */
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struct strbuf stc;
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/* IOMMU state, potentially shared by both PBM segments. */
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struct iommu *iommu;
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/* Now things for the actual PCI bus probes. */
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unsigned int pci_first_busno;
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unsigned int pci_last_busno;
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struct pci_bus *pci_bus;
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struct pci_ops *pci_ops;
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int numa_node;
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};
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extern struct pci_pbm_info *pci_pbm_root;
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extern int pci_num_pbms;
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/* PCI bus scanning and fixup support. */
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void pci_get_pbm_props(struct pci_pbm_info *pbm);
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struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
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struct device *parent);
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void pci_determine_mem_io_space(struct pci_pbm_info *pbm);
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/* Error reporting support. */
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void pci_scan_for_target_abort(struct pci_pbm_info *, struct pci_bus *);
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void pci_scan_for_master_abort(struct pci_pbm_info *, struct pci_bus *);
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void pci_scan_for_parity_error(struct pci_pbm_info *, struct pci_bus *);
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/* Configuration space access. */
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void pci_config_read8(u8 *addr, u8 *ret);
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void pci_config_read16(u16 *addr, u16 *ret);
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void pci_config_read32(u32 *addr, u32 *ret);
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void pci_config_write8(u8 *addr, u8 val);
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void pci_config_write16(u16 *addr, u16 val);
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void pci_config_write32(u32 *addr, u32 val);
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extern struct pci_ops sun4u_pci_ops;
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extern struct pci_ops sun4v_pci_ops;
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extern volatile int pci_poke_in_progress;
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extern volatile int pci_poke_cpu;
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extern volatile int pci_poke_faulted;
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#endif /* !(PCI_IMPL_H) */
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