From: Rakesh Babu Saladi <Saladi.Rakeshbabu@xxxxxxxxxxxxx>
[ Upstream commit a3282f84b2151d254dc4abf24d1255c6382be774 ]
Add Microchip parts to the Device ID table so the driver supports PCI100x
devices.
Add a new macro to quirk the Microchip Switchtec PCI100x parts to allow DMA
access via NTB to work when the IOMMU is turned on.
PCI100x family has 6 variants; each variant is designed for different
application usages, different port counts and lane counts:
PCI1001 has 1 x4 upstream port and 3 x4 downstream ports
PCI1002 has 1 x4 upstream port and 4 x2 downstream ports
PCI1003 has 2 x4 upstream ports, 2 x2 upstream ports, and 2 x2
downstream ports
PCI1004 has 4 x4 upstream ports
PCI1005 has 1 x4 upstream port and 6 x2 downstream ports
PCI1006 has 6 x2 upstream ports and 2 x2 downstream ports
[Historical note: these parts use PCI_VENDOR_ID_EFAR (0x1055), from EFAR
Microsystems, which was acquired in 1996 by Standard Microsystems Corp,
which was acquired by Microchip Technology in 2012. The PCI-SIG confirms
that Vendor ID 0x1055 is assigned to Microchip even though it's not
visible via https://pcisig.com/membership/member-companies]
Link: https://lore.kernel.org/r/20250120095524.243103-1-Saladi.Rakeshbabu@xxxxxxxxxxxxx
Signed-off-by: Rakesh Babu Saladi <Saladi.Rakeshbabu@xxxxxxxxxxxxx>
[bhelgaas: Vendor ID history]
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Acked-By: Logan Gunthorpe <logang@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/pci/quirks.c | 11 +++++++++++
drivers/pci/switch/switchtec.c | 26 ++++++++++++++++++++++++++
2 files changed, 37 insertions(+)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 11fe6869ec3ab..af6cfd88f4b64 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -5985,6 +5985,17 @@ SWITCHTEC_QUIRK(0x5552); /* PAXA 52XG5 */
SWITCHTEC_QUIRK(0x5536); /* PAXA 36XG5 */
SWITCHTEC_QUIRK(0x5528); /* PAXA 28XG5 */
+#define SWITCHTEC_PCI100X_QUIRK(vid) \
+ DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_EFAR, vid, \
+ PCI_CLASS_BRIDGE_OTHER, 8, quirk_switchtec_ntb_dma_alias)
+SWITCHTEC_PCI100X_QUIRK(0x1001); /* PCI1001XG4 */
+SWITCHTEC_PCI100X_QUIRK(0x1002); /* PCI1002XG4 */
+SWITCHTEC_PCI100X_QUIRK(0x1003); /* PCI1003XG4 */
+SWITCHTEC_PCI100X_QUIRK(0x1004); /* PCI1004XG4 */
+SWITCHTEC_PCI100X_QUIRK(0x1005); /* PCI1005XG4 */
+SWITCHTEC_PCI100X_QUIRK(0x1006); /* PCI1006XG4 */
+
+
/*
* The PLX NTB uses devfn proxy IDs to move TLPs between NT endpoints.
* These IDs are used to forward responses to the originator on the other
diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c
index c7e1089ffdafc..b14dfab04d846 100644
--- a/drivers/pci/switch/switchtec.c
+++ b/drivers/pci/switch/switchtec.c
@@ -1739,6 +1739,26 @@ static void switchtec_pci_remove(struct pci_dev *pdev)
.driver_data = gen, \
}
+#define SWITCHTEC_PCI100X_DEVICE(device_id, gen) \
+ { \
+ .vendor = PCI_VENDOR_ID_EFAR, \
+ .device = device_id, \
+ .subvendor = PCI_ANY_ID, \
+ .subdevice = PCI_ANY_ID, \
+ .class = (PCI_CLASS_MEMORY_OTHER << 8), \
+ .class_mask = 0xFFFFFFFF, \
+ .driver_data = gen, \
+ }, \
+ { \
+ .vendor = PCI_VENDOR_ID_EFAR, \
+ .device = device_id, \
+ .subvendor = PCI_ANY_ID, \
+ .subdevice = PCI_ANY_ID, \
+ .class = (PCI_CLASS_BRIDGE_OTHER << 8), \
+ .class_mask = 0xFFFFFFFF, \
+ .driver_data = gen, \
+ }
+
static const struct pci_device_id switchtec_pci_tbl[] = {
SWITCHTEC_PCI_DEVICE(0x8531, SWITCHTEC_GEN3), /* PFX 24xG3 */
SWITCHTEC_PCI_DEVICE(0x8532, SWITCHTEC_GEN3), /* PFX 32xG3 */
@@ -1833,6 +1853,12 @@ static const struct pci_device_id switchtec_pci_tbl[] = {
SWITCHTEC_PCI_DEVICE(0x5552, SWITCHTEC_GEN5), /* PAXA 52XG5 */
SWITCHTEC_PCI_DEVICE(0x5536, SWITCHTEC_GEN5), /* PAXA 36XG5 */
SWITCHTEC_PCI_DEVICE(0x5528, SWITCHTEC_GEN5), /* PAXA 28XG5 */
+ SWITCHTEC_PCI100X_DEVICE(0x1001, SWITCHTEC_GEN4), /* PCI1001 16XG4 */
+ SWITCHTEC_PCI100X_DEVICE(0x1002, SWITCHTEC_GEN4), /* PCI1002 12XG4 */
+ SWITCHTEC_PCI100X_DEVICE(0x1003, SWITCHTEC_GEN4), /* PCI1003 16XG4 */
+ SWITCHTEC_PCI100X_DEVICE(0x1004, SWITCHTEC_GEN4), /* PCI1004 16XG4 */
+ SWITCHTEC_PCI100X_DEVICE(0x1005, SWITCHTEC_GEN4), /* PCI1005 16XG4 */
+ SWITCHTEC_PCI100X_DEVICE(0x1006, SWITCHTEC_GEN4), /* PCI1006 16XG4 */
{0}
};
MODULE_DEVICE_TABLE(pci, switchtec_pci_tbl);
--
2.39.5
