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HV: add DRHD index to pci_pdev

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We add new member pci_pdev.drhd_idx associating the DRHD
(IOMMU) with this pdev, and a method to convert a pbdf of a device to
this index by searching the pdev list.

Partial patch: drhd_index initialization handled in subsequent patch.

v3->v2
        Renamed drhd_idx to drhd_index in pci_pdev struct
	Introduced a macro INVALID_DRHD_INDEX set to 0xFFFFFFFFU

v2-> v1
	Remove (index == -1U) from loop control expression
	to follow MISRA-C

Tracked-On: #4134
Signed-off-by: Alexander Merritt <alex.merritt@intel.com>
Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
This commit is contained in:
Alexander Merritt 2019-10-31 23:58:27 -07:00 committed by wenlingz
parent b0acad338e
commit ef2d43d544
3 changed files with 38 additions and 0 deletions
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23
hypervisor/hw/pci.c
View File

@ -45,6 +45,29 @@ static struct pci_pdev pci_pdev_array[CONFIG_MAX_PCI_DEV_NUM];
static void init_pdev(uint16_t pbdf);
/* @brief: Find the DRHD index corresponding to a PCI device
* Runs through the pci_pdev_array and returns the value in drhd_idx
* member from pdev strucutre that matches matches B:D.F
*
* @pbdf[in] B:D.F of a PCI device
*
* @return if there is a matching pbdf in pci_pdev_array, pdev->drhd_idx, else INVALID_DRHD_INDEX
*/
uint32_t pci_lookup_drhd_for_pbdf(uint16_t pbdf)
{
uint32_t drhd_index = INVALID_DRHD_INDEX;
uint32_t index;
for (index = 0U; index < num_pci_pdev; index++) {
if (pci_pdev_array[index].bdf.value == pbdf) {
drhd_index = pci_pdev_array[index].drhd_index;
break;
}
}
return drhd_index;
}
static uint32_t pci_pdev_calc_address(union pci_bdf bdf, uint32_t offset)
{

2
hypervisor/include/arch/x86/vtd.h
View File

@ -10,6 +10,8 @@
#include <pci.h>
#include <platform_acpi_info.h>
#define INVALID_DRHD_INDEX 0xFFFFFFFFU
/*
* Intel IOMMU register specification per version 1.0 public spec.
*/

13
hypervisor/include/hw/pci.h
View File

@ -205,6 +205,9 @@ struct pci_msix_cap {
};
struct pci_pdev {
/* IOMMU responsible for DMA and Interrupt Remapping for this device */
uint32_t drhd_index;
/* The bar info of the physical PCI device. */
uint32_t nr_bars; /* 6 for normal device, 2 for bridge, 1 for cardbus */
@ -285,6 +288,16 @@ void enable_disable_pci_intx(union pci_bdf bdf, bool enable);
void init_pci_pdev_list(void);
/* @brief: Find the DRHD index corresponding to a PCI device
* Runs through the pci_pdev_array and returns the value in drhd_idx
* member from pdev strucutre that matches matches B:D.F
*
* @pbdf[in] B:D.F of a PCI device
*
* @return if there is a matching pbdf in pci_pdev_array, pdev->drhd_idx, else -1U
*/
uint32_t pci_lookup_drhd_for_pbdf(uint16_t pbdf);
static inline bool is_pci_vendor_valid(uint32_t vendor_id)
{
return !((vendor_id == 0xFFFFFFFFU) || (vendor_id == 0U) ||