d5f394859d
Had to rearrange the proble logic somewhat, but now the bus manager will assign consequtive bus numbers as it finds bridges and recursively drills down to discover the entire bus structure. Does not assign resources yet, but need to do this in the first pass to find all of the devices before can figure out how much space they occupy.
83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
/*
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* Copyright (c) 2021 Travis Geiseblrecht
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*
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* Use of this source code is governed by a MIT-style
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* license that can be found in the LICENSE file or at
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* https://opensource.org/licenses/MIT
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*/
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#pragma once
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#include <sys/types.h>
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#include <dev/bus/pci.h>
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#include <lk/cpp.h>
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namespace pci {
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class bus;
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struct capability;
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// generic pci device
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class device {
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public:
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device(pci_location_t loc, bus *bus);
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virtual ~device();
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DISALLOW_COPY_ASSIGN_AND_MOVE(device);
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static status_t probe(pci_location_t loc, bus *bus, device **out_device);
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status_t probe_capabilities();
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status_t init_msi_capability(capability *cap);
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status_t init_msix_capability(capability *cap);
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status_t allocate_irq(uint *irq);
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status_t allocate_msi(size_t num_requested, uint *msi_base);
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status_t load_config();
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status_t load_bars();
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pci_location_t loc() const { return loc_; }
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const bus *get_bus() const { return bus_; }
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uint16_t device_id() const { return config_.device_id; }
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uint16_t vendor_id() const { return config_.vendor_id; }
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uint8_t base_class() const { return config_.base_class; }
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uint8_t sub_class() const { return config_.sub_class; }
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uint8_t interface() const { return config_.program_interface; }
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uint8_t header_type() const { return config_.header_type & PCI_HEADER_TYPE_MASK; }
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status_t read_bars(pci_bar_t bar[6]);
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bool has_msi() const { return msi_cap_; }
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bool has_msix() const { return msix_cap_; }
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virtual void dump(size_t indent = 0);
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protected:
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// let the bus device directly manipulate our list node
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friend class bus;
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list_node node = LIST_INITIAL_CLEARED_VALUE;
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pci_location_t loc_ = {};
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bus *bus_ = nullptr;
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pci_config_t config_ = {};
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pci_bar_t bars_[6] = {};
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// capability list
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list_node capability_list_ = LIST_INITIAL_VALUE(capability_list_);
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capability *msi_cap_ = nullptr;
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capability *msix_cap_ = nullptr;
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};
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struct capability {
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list_node node = LIST_INITIAL_CLEARED_VALUE;
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uint16_t config_offset = 0;
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uint16_t id = 0;
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// simple accessors
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bool is_msi() const { return id == 0x5; }
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bool is_msix() const { return id == 0x11; }
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};
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} // pci
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