kernel/include/linux/mailbox/mtk-cmdq-mailbox.h, branch linux-6.17.y

mailbox: mtk-cmdq: Refine DMA address handling for the command buffer

2025-12-06T21:27:33Z

[ Upstream commit a195c7ccfb7a21b8118139835e25936ec8722596 ] GCE can only fetch the command buffer address from a 32-bit register. Some SoCs support a 35-bit command buffer address for GCE, which requires a right shift of 3 bits before setting the address into the 32-bit register. A comment has been added to the header of cmdq_get_shift_pa() to explain this requirement. To prevent the GCE command buffer address from being DMA mapped beyond its supported bit range, the DMA bit mask for the device is set during initialization. Additionally, to ensure the correct shift is applied when setting or reading the register that stores the GCE command buffer address, new APIs, cmdq_convert_gce_addr() and cmdq_revert_gce_addr(), have been introduced for consistent operations on this register. The variable type for the command buffer address has been standardized to dma_addr_t to prevent handling issues caused by type mismatches. Fixes: 0858fde496f8 ("mailbox: cmdq: variablize address shift in platform") Signed-off-by: Jason-JH Lin Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Jassi Brar Signed-off-by: Sasha Levin

mailbox: mtk-cmdq: remove cl in struct cmdq_pkt

2025-03-27T01:58:24Z

Every client driver has the struct cmdq_client information, so it's not necessary to store it in struct cmdq_pkt. cl is used to store struct cmdq_client information and now no client driver use it, so remove it. Signed-off-by: Chun-Kuang Hu Signed-off-by: Jassi Brar

mailbox: mtk-cmdq: Remove proprietary cmdq_task_cb

2022-08-02T20:06:57Z

rx_callback is a standard mailbox callback mechanism and could cover the function of proprietary cmdq_task_cb, so use the standard one instead of the proprietary one. Client driver has changed to use standard rx_callback, so remove proprietary cmdq_task_cb. Signed-off-by: Chun-Kuang Hu Reviewed-by: Matthias Brugger Signed-off-by: Jassi Brar

mailbox: mtk-cmdq: Add struct cmdq_pkt in struct cmdq_cb_data

2021-06-26T16:40:20Z

Current client use 'struct cmdq_pkt' as callback data, so change 'void *data' to 'struct cmdq_pkt *pkt'. Keep data until client use pkt instead of data. Signed-off-by: Chun-Kuang Hu Reviewed-by: Yongqiang Niu Signed-off-by: Jassi Brar

mailbox: mtk-cmdq: Remove cmdq_cb_status

2021-06-26T16:39:54Z

cmdq_cb_status is an error status. Use the standard error number instead of cmdq_cb_status to prevent status duplication. Signed-off-by: Chun-Kuang Hu Reviewed-by: Yongqiang Niu Signed-off-by: Jassi Brar

soc: mediatek: cmdq: add clear option in cmdq_pkt_wfe api

2020-09-25T15:27:39Z

Add clear parameter to let client decide if event should be clear to 0 after GCE receive it. Signed-off-by: Dennis YC Hsieh Acked-by: Chun-Kuang Hu Link: https://lore.kernel.org/r/1594136714-11650-9-git-send-email-dennis-yc.hsieh@mediatek.com [mb: fix commit message] Signed-off-by: Matthias Brugger

soc: mediatek: cmdq: add read_s function

2020-09-25T15:27:34Z

Add read_s function in cmdq helper functions which support read value from register or dma physical address into gce internal register. Signed-off-by: Dennis YC Hsieh Link: https://lore.kernel.org/r/1594136714-11650-5-git-send-email-dennis-yc.hsieh@mediatek.com Signed-off-by: Matthias Brugger

soc: mediatek: cmdq: add write_s_mask function

2020-09-25T15:27:32Z

add write_s_mask function in cmdq helper functions which writes value contains in internal register to address with mask and large dma access support. Signed-off-by: Dennis YC Hsieh Link: https://lore.kernel.org/r/1594136714-11650-4-git-send-email-dennis-yc.hsieh@mediatek.com Signed-off-by: Matthias Brugger

soc: mediatek: cmdq: add write_s function

2020-09-25T15:27:31Z

add write_s function in cmdq helper functions which writes value contains in internal register to address with large dma access support. Signed-off-by: Dennis YC Hsieh Link: https://lore.kernel.org/r/1594136714-11650-3-git-send-email-dennis-yc.hsieh@mediatek.com Signed-off-by: Matthias Brugger

Merge tag 'mailbox-v5.9' of git://git.linaro.org/landing-teams/working/fujitsu/integration

2020-08-07T19:58:11Z

Pull mailbox updates from Jassi Brar: "mediatek: - add support for mt6779 gce - shutdown cleanup and address shift support qcom: - add msm8994 apcs and sdm660 hmss compatibility imx: - mark PM funcs __maybe pcc: - put acpi table before bailout misc: - replace http with https links" * tag 'mailbox-v5.9' of git://git.linaro.org/landing-teams/working/fujitsu/integration: mailbox: mediatek: cmdq: clear task in channel before shutdown mailbox: cmdq: support mt6779 gce platform definition mailbox: cmdq: variablize address shift in platform dt-binding: gce: add gce header file for mt6779 mailbox: qcom: Add msm8994 apcs compatible mailbox: qcom: Add sdm660 hmss compatible mailbox: imx: Mark PM functions as __maybe_unused mailbox: pcc: Put the PCCT table for error path mailbox: Replace HTTP links with HTTPS ones