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IB/hfi1: Move saving PCI values to a separate function 

During PCIe initialization some registers' values from
PCI config space are saved in order to restore them later
(i.e. after reset). Restoring those value is done by a
function called restore_pci_variables, while saving them
is put directly into function hfi1_pcie_ddinit.
Move saving values to a separate function in the image
of restoring functionality.

Reviewed-by: Jakub Byczkowski <jakub.byczkowski@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Bartlomiej Dudek <bartlomiej.dudek@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Bartlomiej Dudek 2017-07-24 07:46:30 -07:00 committed by Doug Ledford
parent a156abb3cf
commit a618b7e40a
3 changed files with 64 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/infiniband/hw/hfi1/chip.c
View File

@ -14866,6 +14866,11 @@ struct hfi1_devdata *hfi1_init_dd(struct pci_dev *pdev,
if (ret < 0)
goto bail_free;
/* Save PCI space registers to rewrite after device reset */
ret = save_pci_variables(dd);
if (ret < 0)
goto bail_cleanup;
/* verify that reads actually work, save revision for reset check */
dd->revision = read_csr(dd, CCE_REVISION);
if (dd->revision == ~(u64)0) {

1
drivers/infiniband/hw/hfi1/hfi.h
View File

@ -1835,6 +1835,7 @@ void hfi1_pcie_ddcleanup(struct hfi1_devdata *);
int pcie_speeds(struct hfi1_devdata *dd);
int request_msix(struct hfi1_devdata *dd, u32 msireq);
int restore_pci_variables(struct hfi1_devdata *dd);
int save_pci_variables(struct hfi1_devdata *dd);
int do_pcie_gen3_transition(struct hfi1_devdata *dd);
int parse_platform_config(struct hfi1_devdata *dd);
int get_platform_config_field(struct hfi1_devdata *dd,

110
drivers/infiniband/hw/hfi1/pcie.c
View File

@ -221,63 +221,11 @@ int hfi1_pcie_ddinit(struct hfi1_devdata *dd, struct pci_dev *pdev)
}
dd_dev_info(dd, "WC RcvArray: %p for %x\n",
dd->rcvarray_wc, dd->chip_rcv_array_count * 8);
/*
* Save BARs and command to rewrite after device reset.
*/
ret = pci_read_config_dword(dd->pcidev, PCI_BASE_ADDRESS_0, &dd->pcibar0);
if (ret)
goto read_error;
ret = pci_read_config_dword(dd->pcidev, PCI_BASE_ADDRESS_1, &dd->pcibar1);
if (ret)
goto read_error;
ret = pci_read_config_dword(dd->pcidev, PCI_ROM_ADDRESS, &dd->pci_rom);
if (ret)
goto read_error;
ret = pci_read_config_word(dd->pcidev, PCI_COMMAND, &dd->pci_command);
if (ret)
goto read_error;
ret = pcie_capability_read_word(dd->pcidev, PCI_EXP_DEVCTL,
&dd->pcie_devctl);
if (ret)
goto read_error;
ret = pcie_capability_read_word(dd->pcidev, PCI_EXP_LNKCTL,
&dd->pcie_lnkctl);
if (ret)
goto read_error;
ret = pcie_capability_read_word(dd->pcidev, PCI_EXP_DEVCTL2,
&dd->pcie_devctl2);
if (ret)
goto read_error;
ret = pci_read_config_dword(dd->pcidev, PCI_CFG_MSIX0, &dd->pci_msix0);
if (ret)
goto read_error;
ret = pci_read_config_dword(dd->pcidev, PCIE_CFG_SPCIE1,
&dd->pci_lnkctl3);
if (ret)
goto read_error;
ret = pci_read_config_dword(dd->pcidev, PCIE_CFG_TPH2, &dd->pci_tph2);
if (ret)
goto read_error;
dd->flags |= HFI1_PRESENT; /* chip.c CSR routines now work */
return 0;
read_error:
dd_dev_err(dd, "Unable to read from PCI config\n");
goto bail_error;
nomem:
ret = -ENOMEM;
bail_error:
hfi1_pcie_ddcleanup(dd);
return ret;
}
@ -484,6 +432,64 @@ int restore_pci_variables(struct hfi1_devdata *dd)
return ret;
}
/* Save BARs and command to rewrite after device reset */
int save_pci_variables(struct hfi1_devdata *dd)
{
int ret = 0;
ret = pci_read_config_dword(dd->pcidev, PCI_BASE_ADDRESS_0,
&dd->pcibar0);
if (ret)
goto error;
ret = pci_read_config_dword(dd->pcidev, PCI_BASE_ADDRESS_1,
&dd->pcibar1);
if (ret)
goto error;
ret = pci_read_config_dword(dd->pcidev, PCI_ROM_ADDRESS, &dd->pci_rom);
if (ret)
goto error;
ret = pci_read_config_word(dd->pcidev, PCI_COMMAND, &dd->pci_command);
if (ret)
goto error;
ret = pcie_capability_read_word(dd->pcidev, PCI_EXP_DEVCTL,
&dd->pcie_devctl);
if (ret)
goto error;
ret = pcie_capability_read_word(dd->pcidev, PCI_EXP_LNKCTL,
&dd->pcie_lnkctl);
if (ret)
goto error;
ret = pcie_capability_read_word(dd->pcidev, PCI_EXP_DEVCTL2,
&dd->pcie_devctl2);
if (ret)
goto error;
ret = pci_read_config_dword(dd->pcidev, PCI_CFG_MSIX0, &dd->pci_msix0);
if (ret)
goto error;
ret = pci_read_config_dword(dd->pcidev, PCIE_CFG_SPCIE1,
&dd->pci_lnkctl3);
if (ret)
goto error;
ret = pci_read_config_dword(dd->pcidev, PCIE_CFG_TPH2, &dd->pci_tph2);
if (ret)
goto error;
return 0;
error:
dd_dev_err(dd, "Unable to read from PCI config\n");
return ret;
}
/*
* BIOS may not set PCIe bus-utilization parameters for best performance.
* Check and optionally adjust them to maximize our throughput.