kernel/git/stable/linux.git/drivers/pci/ide.c, branch linux-7.2.y

PCI: Use FIELD_MODIFY() instead of open-coding it

2026-05-05T16:48:13+00:00

Use FIELD_MODIFY() to remove open-coded bit manipulation. No functional change intended. Signed-off-by: Hans Zhang <18255117159@163.com> [bhelgaas: squash together] Signed-off-by: Bjorn Helgaas Reviewed-by: Frank Li # pcie-nxp-s32g.c Link: https://patch.msgid.link/20260430162420.42839-2-18255117159@163.com Link: https://patch.msgid.link/20260430162420.42839-3-18255117159@163.com Link: https://patch.msgid.link/20260430162420.42839-4-18255117159@163.com Link: https://patch.msgid.link/20260430162420.42839-5-18255117159@163.com Link: https://patch.msgid.link/20260430162420.42839-6-18255117159@163.com Link: https://patch.msgid.link/20260430162420.42839-7-18255117159@163.com Link: https://patch.msgid.link/20260430162420.42839-8-18255117159@163.com Link: https://patch.msgid.link/20260430162420.42839-9-18255117159@163.com Link: https://patch.msgid.link/20260430162420.42839-10-18255117159@163.com Link: https://patch.msgid.link/20260430162420.42839-11-18255117159@163.com Link: https://patch.msgid.link/20260430162420.42839-12-18255117159@163.com Link: https://patch.msgid.link/20260430162420.42839-13-18255117159@163.com Link: https://patch.msgid.link/20260430162420.42839-14-18255117159@163.com Link: https://patch.msgid.link/20260430162420.42839-15-18255117159@163.com Link: https://patch.msgid.link/20260430162420.42839-16-18255117159@163.com Link: https://patch.msgid.link/20260430162420.42839-17-18255117159@163.com

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

PCI/IDE: Fix reading a wrong reg for unused sel stream initialization

2026-01-23T01:47:21+00:00

During pci_ide_init(), it will write PCI_ID_RESERVED_STREAM_ID into all unused selective IDE stream blocks. In a selective IDE stream block, IDE stream ID field is in selective IDE stream control register instead of selective IDE stream capability register. Fixes: 079115370d00 ("PCI/IDE: Initialize an ID for all IDE streams") Signed-off-by: Li Ming Acked-by: Bjorn Helgaas Reviewed-by: Xu Yilun Link: https://patch.msgid.link/20260111073823.486665-1-ming.li@zohomail.com Signed-off-by: Dan Williams

PCI/IDE: Fix off by one error calculating VF RID range

2026-01-23T01:47:21+00:00

The VF ID range of an SR-IOV device is [0, num_VFs - 1]. pci_ide_stream_alloc() mistakenly uses num_VFs to represent the last ID. Fix that off by one error to stay in bounds of the range. Fixes: 1e4d2ff3ae45 ("PCI/IDE: Add IDE establishment helpers") Signed-off-by: Li Ming Reviewed-by: Xu Yilun Link: https://patch.msgid.link/20260114111455.550984-1-ming.li@zohomail.com Signed-off-by: Dan Williams

Revert "PCI/TSM: Report active IDE streams"

2026-01-23T01:46:44+00:00

The proposed ABI failed to account for multiple host bridges with the same stream name. The fix needs to namespace streams or otherwise link back to the host bridge, but a change like that is too big for a fix. Given this ABI never saw a released kernel, delete it for now and bring it back later with this issue addressed. Reported-by: Xu Yilun Reported-by: Yi Lai Closes: http://lore.kernel.org/20251223085601.2607455-1-yilun.xu@linux.intel.com Link: http://patch.msgid.link/6972c872acbb9_1d3310035@dwillia2-mobl4.notmuch Signed-off-by: Dan Williams

PCI/IDE: Initialize an ID for all IDE streams

2025-11-14T23:06:57+00:00

The PCIe spec defines two types of streams - selective and link. Each stream has an ID from the same bucket so a stream ID does not tell the type. The spec defines an "enable" bit for every stream and required stream IDs to be unique among all enabled stream but there is no such requirement for disabled streams. However, when IDE_KM is programming keys, an IDE-capable device needs to know the type of stream being programmed to write it directly to the hardware as keys are relatively large, possibly many of them and devices often struggle with keeping around rather big data not being used. Walk through all streams on a device and initialise the IDs to some unique number, both link and selective. The weakest part of this proposal is the host bridge ide_stream_ids_ida. Technically, a Stream ID only needs to be unique within a given partner pair. However, with "anonymous" / unassigned streams there is no convenient place to track the available ids. Proceed with an ida in the host bridge for now, but consider moving this tracking to be an ide_stream_ids_ida per device. Co-developed-by: Alexey Kardashevskiy Signed-off-by: Alexey Kardashevskiy Reviewed-by: Jonathan Cameron Link: https://patch.msgid.link/20251113021446.436830-6-dan.j.williams@intel.com Signed-off-by: Dan Williams

PCI/IDE: Add Address Association Register setup for downstream MMIO

2025-11-14T23:06:57+00:00

The address ranges for downstream Address Association Registers need to cover memory addresses for all functions (PFs/VFs/downstream devices) managed by a Device Security Manager (DSM). The proposed solution is get the memory (32-bit only) range and prefetchable-memory (64-bit capable) range from the immediate ancestor downstream port (either the direct-attach RP or deepest switch port when switch attached). Similar to RID association, address associations will be set by default if hardware sets 'Number of Address Association Register Blocks' in the 'Selective IDE Stream Capability Register' to a non-zero value. TSM drivers can opt-out of the settings by zero'ing out unwanted / unsupported address ranges. E.g. TDX Connect only supports prefetachable (64-bit capable) memory ranges for the Address Association setting. If the immediate downstream port provides both a memory range and prefetchable-memory range, but the IDE partner port only provides 1 Address Association Register block then the TSM driver can pick which range to associate, or let the PCI core prioritize memory. Note, the Address Association Register setup for upstream requests is still uncertain so is not included. Co-developed-by: Aneesh Kumar K.V Signed-off-by: Aneesh Kumar K.V Co-developed-by: Arto Merilainen Signed-off-by: Arto Merilainen Signed-off-by: Xu Yilun Co-developed-by: Dan Williams Reviewed-by: Jonathan Cameron Link: https://patch.msgid.link/20251114010227.567693-1-dan.j.williams@intel.com Signed-off-by: Dan Williams

PCI/TSM: Report active IDE streams

2025-11-04T03:27:41+00:00

Given that the platform TSM owns IDE Stream ID allocation, report the active streams via the TSM class device. Establish a symlink from the class device to the PCI endpoint device consuming the stream, named by the Stream ID. Acked-by: Bjorn Helgaas Reviewed-by: Jonathan Cameron Reviewed-by: Alexey Kardashevskiy Link: https://patch.msgid.link/20251031212902.2256310-10-dan.j.williams@intel.com Signed-off-by: Dan Williams

PCI/IDE: Report available IDE streams

2025-11-04T03:27:41+00:00

The limited number of link-encryption (IDE) streams that a given set of host bridges supports is a platform specific detail. Provide pci_ide_init_nr_streams() as a generic facility for either platform TSM drivers, or PCI core native IDE, to report the number available streams. After invoking pci_ide_init_nr_streams() an "available_secure_streams" attribute appears in PCI host bridge sysfs to convey that count. Introduce a device-type, @pci_host_bridge_type, now that both a release method and sysfs attribute groups are being specified for all 'struct pci_host_bridge' instances. Cc: Bjorn Helgaas Cc: Lukas Wunner Cc: Samuel Ortiz Cc: Alexey Kardashevskiy Cc: Xu Yilun Acked-by: Bjorn Helgaas Reviewed-by: Jonathan Cameron Link: https://patch.msgid.link/20251031212902.2256310-9-dan.j.williams@intel.com Signed-off-by: Dan Williams