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pci: tegra264-ep: Fix set_bar and map_addr ICD

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- set_bar when called post controller initialization should be rejected.
- map_addr outcome is to be able to access remote memory rather than
  register update.

Update API documentation information accordingly.

JIRA NET-2663

Change-Id: Ie4e1b029200fa8e61685e97ba3a0f029c3e6fe9d
Signed-off-by: Nagarjuna Kristam <nkristam@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3310942
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>
This commit is contained in:
Nagarjuna Kristam
2025-02-27 11:49:06 +05:30
committed by Jon Hunter
parent 524e20def3
commit ce0a05749b
1 changed files with 3 additions and 2 deletions
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5
drivers/pci/controller/private-soc/pcie-tegra264-ep.h
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@@ -236,7 +236,7 @@ static int tegra264_pcie_ep_write_header(struct pci_epc *epc, u8 fn,
* *
* @return * @return
* - 0 on If Bar details are in range.. * - 0 on If Bar details are in range..
* - -EINVAL if Bar configuration is not supported * - -EINVAL if Bar configuration is not supported or called once link is established.
*/ */
static int tegra264_pcie_ep_set_bar(struct pci_epc *epc, u8 fn, static int tegra264_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
#if defined(NV_PCI_EPC_WRITE_HEADER_HAS_VFN_ARG) #if defined(NV_PCI_EPC_WRITE_HEADER_HAS_VFN_ARG)
@@ -324,7 +324,8 @@ static void tegra264_pcie_ep_clear_bar(struct pci_epc *epc, u8 fn,
* if called before controller is initialized. * if called before controller is initialized.
* *
* @outcome * @outcome
* - On success, mapping details in Tegra264 EP controller register is updated. * - On success, outbound address is mapped to controller aperture and caller can access
* remote memory.
*/ */
static int tegra264_pcie_ep_map_addr(struct pci_epc *epc, u8 func_no, static int tegra264_pcie_ep_map_addr(struct pci_epc *epc, u8 func_no,
#if defined(NV_PCI_EPC_WRITE_HEADER_HAS_VFN_ARG) #if defined(NV_PCI_EPC_WRITE_HEADER_HAS_VFN_ARG)