diff options
| author |   Vivian Wang <wangruikang@iscas.ac.cn> | 2026-01-29 09:56:08 +0800 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@kernel.org> | 2026-01-31 01:11:48 +0100 |
| commit | 617562bbe12df796fc21df5fbf262eadf083a90f (patch) | |
| tree | b6f0c8e386dabe7c1fdbd7f234f7d5dbebeaaab6 /include/linux/bcma/ssh:/git@git.zx2c4.com | |
| parent | PCI/MSI: Check the device specific address mask in msi_verify_entries() (diff) | |
drm/radeon: Make MSI address limit based on the device DMA limit
The radeon driver restricts the MSI message address for devices older than
the BONAIR generation to 32-bit MSI addresses due to the former
restrictions of the PCI/MSI code which only allowed either 32-bit or full
64-bit address range.
This does not work on platforms which have a MSI doorbell address above the
32-bit boundary but do not support the full 64 bit address range.
The PCI/MSI core converted this binary decision to a DMA_BIT_MASK() based
decision, which allows to describe the device limitations precisely.
Convert the driver to provide the exact DMA address limitations to the
PCI/MSI core. That allows devices which do not support the full 64-bit
address space to work on platforms which have a MSI doorbell address above
the 32-bit limit as long as it is within the hardware's addressable range.
[ tglx: Massage changelog ]
Signed-off-by: Vivian Wang <wangruikang@iscas.ac.cn>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patch.msgid.link/20260129-pci-msi-addr-mask-v4-3-70da998f2750@iscas.ac.cn
Diffstat (limited to 'include/linux/bcma/ssh:/git@git.zx2c4.com')
0 files changed, 0 insertions, 0 deletions