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PCI: endpoint: Add support to handle multiple base for mapping outbound memory

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R-Car PCIe controller has support to map multiple memory regions for
mapping the outbound memory in local system also the controller limits
single allocation for each region (that is, once a chunk is used from the
region it cannot be used to allocate a new one). This features inspires to
add support for handling multiple memory bases in endpoint framework.

With this patch pci_epc_mem_init() initializes address space for endpoint
controller which support single window and pci_epc_multi_mem_init()
initializes multiple windows supported by endpoint controller.

Link: https://lore.kernel.org/r/1588854799-13710-6-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Lad Prabhakar
2020-05-07 13:33:16 +01:00
committed by Lorenzo Pieralisi
parent 975cf23e3a
commit d45e3c1a59
3 changed files with 171 additions and 79 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/pci/controller/dwc/pcie-designware-ep.c
View File

@@ -412,11 +412,11 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
reg = ep->msi_cap + PCI_MSI_DATA_32;
msg_data = dw_pcie_readw_dbi(pci, reg);
}
aligned_offset = msg_addr_lower & (epc->mem->page_size - 1);
aligned_offset = msg_addr_lower & (epc->mem->window.page_size - 1);
msg_addr = ((u64)msg_addr_upper) << 32 |
(msg_addr_lower & ~aligned_offset);
ret = dw_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys, msg_addr,
epc->mem->page_size);
epc->mem->window.page_size);
if (ret)
return ret;
@@ -459,9 +459,9 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
return -EPERM;
}
aligned_offset = msg_addr & (epc->mem->page_size - 1);
aligned_offset = msg_addr & (epc->mem->window.page_size - 1);
ret = dw_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys, msg_addr,
epc->mem->page_size);
epc->mem->window.page_size);
if (ret)
return ret;
@@ -477,7 +477,7 @@ void dw_pcie_ep_exit(struct dw_pcie_ep *ep)
struct pci_epc *epc = ep->epc;
pci_epc_mem_free_addr(epc, ep->msi_mem_phys, ep->msi_mem,
epc->mem->page_size);
epc->mem->window.page_size);
pci_epc_mem_exit(epc);
}
@@ -610,15 +610,15 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
if (ret < 0)
epc->max_functions = 1;
ret = __pci_epc_mem_init(epc, ep->phys_base, ep->addr_size,
ep->page_size);
ret = pci_epc_mem_init(epc, ep->phys_base, ep->addr_size,
ep->page_size);
if (ret < 0) {
dev_err(dev, "Failed to initialize address space\n");
return ret;
}
ep->msi_mem = pci_epc_mem_alloc_addr(epc, &ep->msi_mem_phys,
epc->mem->page_size);
epc->mem->window.page_size);
if (!ep->msi_mem) {
dev_err(dev, "Failed to reserve memory for MSI/MSI-X\n");
return -ENOMEM;