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557870c05f
- Supporting multiple instances of ivShMem virtual devices.
- Introduces DT based configuration for ivShMem devices.
- Add DTS overlay file to test new multiple ivshmem instance capability.
- Enable BDF unspecified device initialization.
(limited to one instance. An improved version of pcie_bdf_lookup()
will come soon that fixes this limitation)
- Make PCIE DTS file macros available for a proper ivshmem device
properties parsing.
Sample for dts file:
pcie0 {
label = "PCIE_0";
#address-cells = <1>;
#size-cells = <1>;
compatible = "intel,pcie";
ranges;
ivshmem0: ivshmem@800 {
compatible = "qemu,ivshmem";
reg = <PCIE_BDF_NONE PCIE_ID(0x1af4,0x1110)>;
label = "IVSHMEM";
status = "okay";
};
};
Signed-off-by: Michael Schmidt <michael1.schmidt@intel.com>
48 lines
1020 B
C
48 lines
1020 B
C
/*
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* Copyright (c) 2020 Intel Corporation.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_DRIVERS_VIRTUALIZATION_VIRT_IVSHMEM_H_
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#define ZEPHYR_DRIVERS_VIRTUALIZATION_VIRT_IVSHMEM_H_
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#include <drivers/pcie/pcie.h>
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#include <drivers/pcie/msi.h>
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#define IVSHMEM_VENDOR_ID 0x1AF4
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#define IVSHMEM_DEVICE_ID 0x1110
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#define IVSHMEM_PCIE_REG_BAR_IDX 0
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#define IVSHMEM_PCIE_SHMEM_BAR_IDX 2
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struct ivshmem_param {
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const struct device *dev;
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struct k_poll_signal *signal;
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uint8_t vector;
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};
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struct ivshmem {
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DEVICE_MMIO_RAM;
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pcie_bdf_t bdf;
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uint32_t dev_ven_id;
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uintptr_t shmem;
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size_t size;
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#ifdef CONFIG_IVSHMEM_DOORBELL
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msi_vector_t vectors[CONFIG_IVSHMEM_MSI_X_VECTORS];
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struct ivshmem_param params[CONFIG_IVSHMEM_MSI_X_VECTORS];
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uint16_t n_vectors;
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#endif
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};
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struct ivshmem_reg {
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uint32_t int_mask;
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uint32_t int_status;
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uint32_t iv_position;
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uint32_t doorbell;
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};
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#define IVSHMEM_GEN_DOORBELL(i, v) ((i << 16) | (v & 0xFFFF))
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#endif /* ZEPHYR_DRIVERS_VIRTUALIZATION_VIRT_IVSHMEM_H_ */
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