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| author | Niklas Cassel <cassel@kernel.org> | 2024-02-16 16:45:14 +0300 |
|---|---|---|
| committer | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2024-02-16 18:00:46 +0300 |
| commit | e01c9797c0ebb307c9bb196c677f6e571335773e (patch) | |
| tree | edfb2244165f0cddeb12665e3c3ebf5db6b9b40f /drivers/pci/endpoint/functions/pci-epf-test.c | |
| parent | c670e29f5bfe6c404a5405a0fa8e235de2f4f0c9 (diff) | |
| download | linux-e01c9797c0ebb307c9bb196c677f6e571335773e.tar.xz | |
PCI: endpoint: Clean up hardware description for BARs
The hardware description for BARs is scattered in many different variables
in pci_epc_features. Some of these things are mutually exclusive, so it
can create confusion over which variable that has precedence over another.
Improve the situation by creating a struct pci_epc_bar_desc, and a new
enum pci_epc_bar_type, and convert the endpoint controller drivers to use
this more well defined format.
Additionally, some endpoint controller drivers mark the BAR succeeding a
"64-bit only BAR" as reserved, while some do not. By definition, a 64-bit
BAR uses the succeeding BAR for the upper 32-bits, so an EPF driver cannot
use a BAR succeeding a 64-bit BAR. Ensure that all endpoint controller
drivers are uniform, and actually describe a reserved BAR as reserved.
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Kishon Vijay Abraham I <kishon@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20240216134524.1142149-2-cassel@kernel.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Diffstat (limited to 'drivers/pci/endpoint/functions/pci-epf-test.c')
| -rw-r--r-- | drivers/pci/endpoint/functions/pci-epf-test.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c index 981894e40681..cd4ffb39dcdc 100644 --- a/drivers/pci/endpoint/functions/pci-epf-test.c +++ b/drivers/pci/endpoint/functions/pci-epf-test.c @@ -729,7 +729,7 @@ static int pci_epf_test_set_bar(struct pci_epf *epf) */ add = (epf_bar->flags & PCI_BASE_ADDRESS_MEM_TYPE_64) ? 2 : 1; - if (!!(epc_features->reserved_bar & (1 << bar))) + if (epc_features->bar[bar].type == BAR_RESERVED) continue; ret = pci_epc_set_bar(epc, epf->func_no, epf->vfunc_no, @@ -856,7 +856,7 @@ static int pci_epf_test_alloc_space(struct pci_epf *epf) if (bar == test_reg_bar) continue; - if (!!(epc_features->reserved_bar & (1 << bar))) + if (epc_features->bar[bar].type == BAR_RESERVED) continue; base = pci_epf_alloc_space(epf, bar_size[bar], bar, @@ -874,13 +874,11 @@ static void pci_epf_configure_bar(struct pci_epf *epf, const struct pci_epc_features *epc_features) { struct pci_epf_bar *epf_bar; - bool bar_fixed_64bit; int i; for (i = 0; i < PCI_STD_NUM_BARS; i++) { epf_bar = &epf->bar[i]; - bar_fixed_64bit = !!(epc_features->bar_fixed_64bit & (1 << i)); - if (bar_fixed_64bit) + if (epc_features->bar[i].only_64bit) epf_bar->flags |= PCI_BASE_ADDRESS_MEM_TYPE_64; } } |