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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-10-27 GuEe-GUI first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#define DBG_TAG "rtdm.ivshmem"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#include <cpuport.h>
#include "ivshmem.h"
static void ivshmem_isr(int irqno, void *param)
{
rt_uint32_t status;
struct ivshmem_device *ivdev = param;
status = HWREG32(ivdev->reg + IVSHMEM_INTR_STATUS);
if ((status && status != 0xffffffff) || ivdev->nvectors)
{
if (ivdev->handle_irq)
{
ivdev->handle_irq(ivdev, ivdev->nvectors ? irqno : status);
}
else
{
LOG_E("IVSHMEM<%p> have a irq = %d, by no have irq handers", ivdev, irqno);
}
}
}
rt_err_t ivshmem_install_msix_vectors(struct ivshmem_device *ivdev, int nvectors, const char *name)
{
rt_err_t err = RT_EOK;
char irq_name[RT_NAME_MAX];
if (!ivdev || !name)
{
return -RT_EINVAL;
}
if (ivdev->nvectors != 0)
{
LOG_E("IVSHMEM<%p> '%s' have already install msix", ivdev, name);
return -RT_ERROR;
}
if (!ivdev->handle_irq)
{
LOG_E("IVSHMEM<%p> '%s' no have irq handers", ivdev, name);
return -RT_EINVAL;
}
ivdev->msix_entries = rt_malloc(nvectors * sizeof(*ivdev->msix_entries));
if (!ivdev->msix_entries)
{
return -RT_ENOMEM;
}
ivdev->nvectors = nvectors;
rt_pci_msix_entry_index_linear(ivdev->msix_entries, nvectors);
if ((err = rt_pci_msix_enable(ivdev->pdev, ivdev->msix_entries, ivdev->nvectors)))
{
rt_free(ivdev->msix_entries);
ivdev->msix_entries = RT_NULL;
ivdev->nvectors = 0;
return err;
}
for (int i = 0; i < nvectors; i++)
{
int irq = ivdev->msix_entries[i].irq;
rt_snprintf(irq_name, RT_NAME_MAX, "%s%d", name, irq);
rt_hw_interrupt_install(irq, ivshmem_isr, ivdev, irq_name);
rt_hw_interrupt_umask(irq);
}
return err;
}
rt_err_t ivshmem_install_intx_vector(struct ivshmem_device *ivdev, const char *name)
{
rt_err_t err = RT_EOK;
if (!ivdev || !name)
{
return -RT_EINVAL;
}
if (ivdev->nvectors != 0)
{
LOG_E("IVSHMEM<%p> '%s' have already install msix", ivdev, name);
return -RT_ERROR;
}
if (!ivdev->handle_irq)
{
LOG_E("IVSHMEM<%p> '%s' no have irq handers", ivdev, name);
return -RT_EINVAL;
}
ivdev->nvectors = 0;
ivdev->msix_entries = RT_NULL;
rt_hw_interrupt_install(ivdev->irq, ivshmem_isr, ivdev, name);
rt_pci_irq_unmask(ivdev->pdev);
return err;
}
static void ivshmem_free_resource(struct ivshmem_device *ivdev)
{
if (ivdev->pdev)
{
ivdev->pdev->sysdata = RT_NULL;
}
if (ivdev->reg)
{
rt_iounmap(ivdev->reg);
}
if (ivdev->shmem)
{
rt_iounmap(ivdev->shmem);
}
}
rt_err_t ivshmem_pci_probe(struct rt_pci_device *pdev, struct ivshmem_device *ivdev)
{
rt_err_t err = RT_EOK;
if (!ivdev || !pdev || pdev->irq < 0)
{
return -RT_EINVAL;
}
rt_memset(ivdev, 0, sizeof(*ivdev));
ivdev->pdev = pdev;
ivdev->irq = pdev->irq;
pdev->sysdata = ivdev;
ivdev->reg = rt_pci_iomap(pdev, IVSHMEM_REG_BAR);
if (!ivdev->reg)
{
err = -RT_EIO;
goto _fail;
}
/* Set all masks to on */
HWREG32(ivdev->reg + IVSHMEM_INTR_MASK) = 0xffffffff;
ivdev->shmem_size = pdev->resource[IVSHMEM_SHARE_MEM_BAR].size;
ivdev->shmem = (void *)pdev->resource[IVSHMEM_SHARE_MEM_BAR].base;
if (!ivdev->shmem_size)
{
rt_pci_read_config_u32(pdev, PCI_CFG_SHARE_MEM_ADDR_LO, (rt_uint32_t *)&ivdev->shmem);
rt_pci_read_config_u32(pdev, PCI_CFG_SHARE_MEM_ADDR_HI, (rt_uint32_t *)&ivdev->shmem + 1);
rt_pci_read_config_u32(pdev, PCI_CFG_SHARE_MEM_SIZE_LO, (rt_uint32_t *)&ivdev->shmem_size);
rt_pci_read_config_u32(pdev, PCI_CFG_SHARE_MEM_SIZE_HI, (rt_uint32_t *)&ivdev->shmem_size + 1);
}
ivdev->shmem = rt_ioremap(ivdev->shmem, ivdev->shmem_size);
if (!ivdev->shmem)
{
err = -RT_ERROR;
goto _fail;
}
return RT_EOK;
_fail:
ivshmem_free_resource(ivdev);
return err;
}
struct ivshmem_device *ivshmem_pci_remove(struct rt_pci_device *pdev)
{
struct ivshmem_device *ivdev = RT_NULL;
if (!pdev || !pdev->sysdata)
{
return ivdev;
}
ivdev = pdev->sysdata;
if (ivdev->msix_entries)
{
for (int i = 0; i < ivdev->nvectors; ++i)
{
int irq = ivdev->msix_entries[i].irq;
rt_hw_interrupt_umask(irq);
rt_pic_detach_irq(irq, ivdev);
}
}
rt_hw_interrupt_umask(ivdev->irq);
rt_pic_detach_irq(ivdev->irq, ivdev);
if (ivdev->nvectors)
{
rt_pci_msix_disable(ivdev->pdev);
rt_free(ivdev->msix_entries);
}
else
{
rt_pci_irq_unmask(ivdev->pdev);
}
ivshmem_free_resource(ivdev);
return ivdev;
}
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