diff options
Diffstat (limited to 'drivers/gpu/drm/imagination/pvr_cccb.h')
-rw-r--r-- | drivers/gpu/drm/imagination/pvr_cccb.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imagination/pvr_cccb.h b/drivers/gpu/drm/imagination/pvr_cccb.h new file mode 100644 index 0000000000..943fe8f2c9 --- /dev/null +++ b/drivers/gpu/drm/imagination/pvr_cccb.h @@ -0,0 +1,110 @@ +/* SPDX-License-Identifier: GPL-2.0-only OR MIT */ +/* Copyright (c) 2023 Imagination Technologies Ltd. */ + +#ifndef PVR_CCCB_H +#define PVR_CCCB_H + +#include "pvr_rogue_fwif.h" +#include "pvr_rogue_fwif_shared.h" + +#include <linux/mutex.h> +#include <linux/types.h> + +#define PADDING_COMMAND_SIZE sizeof(struct rogue_fwif_ccb_cmd_header) + +/* Forward declaration from pvr_device.h. */ +struct pvr_device; + +/* Forward declaration from pvr_gem.h. */ +struct pvr_fw_object; + +/* Forward declaration from pvr_hwrt.h. */ +struct pvr_hwrt_data; + +struct pvr_cccb { + /** @ctrl_obj: FW object representing CCCB control structure. */ + struct pvr_fw_object *ctrl_obj; + + /** @ccb_obj: FW object representing CCCB. */ + struct pvr_fw_object *cccb_obj; + + /** + * @ctrl: Kernel mapping of CCCB control structure. @lock must be held + * when accessing. + */ + struct rogue_fwif_cccb_ctl *ctrl; + + /** @cccb: Kernel mapping of CCCB. @lock must be held when accessing.*/ + u8 *cccb; + + /** @ctrl_fw_addr: FW virtual address of CCCB control structure. */ + u32 ctrl_fw_addr; + /** @ccb_fw_addr: FW virtual address of CCCB. */ + u32 cccb_fw_addr; + + /** @size: Size of CCCB in bytes. */ + size_t size; + + /** @write_offset: CCCB write offset. */ + u32 write_offset; + + /** @wrap_mask: CCCB wrap mask. */ + u32 wrap_mask; +}; + +int pvr_cccb_init(struct pvr_device *pvr_dev, struct pvr_cccb *cccb, + u32 size_log2, const char *name); +void pvr_cccb_fini(struct pvr_cccb *cccb); + +void pvr_cccb_write_command_with_header(struct pvr_cccb *pvr_cccb, + u32 cmd_type, u32 cmd_size, void *cmd_data, + u32 ext_job_ref, u32 int_job_ref); +void pvr_cccb_send_kccb_kick(struct pvr_device *pvr_dev, + struct pvr_cccb *pvr_cccb, u32 cctx_fw_addr, + struct pvr_hwrt_data *hwrt); +void pvr_cccb_send_kccb_combined_kick(struct pvr_device *pvr_dev, + struct pvr_cccb *geom_cccb, + struct pvr_cccb *frag_cccb, + u32 geom_ctx_fw_addr, + u32 frag_ctx_fw_addr, + struct pvr_hwrt_data *hwrt, + bool frag_is_pr); +bool pvr_cccb_cmdseq_fits(struct pvr_cccb *pvr_cccb, size_t size); + +/** + * pvr_cccb_get_size_of_cmd_with_hdr() - Get the size of a command and its header. + * @cmd_size: Command size. + * + * Returns the size of the command and its header. + */ +static __always_inline u32 +pvr_cccb_get_size_of_cmd_with_hdr(u32 cmd_size) +{ + WARN_ON(!IS_ALIGNED(cmd_size, 8)); + return sizeof(struct rogue_fwif_ccb_cmd_header) + ALIGN(cmd_size, 8); +} + +/** + * pvr_cccb_cmdseq_can_fit() - Check if a command sequence can fit in the CCCB. + * @pvr_cccb: Target Client CCB. + * @size: Command sequence size. + * + * Returns: + * * true it the CCCB is big enough to contain a command sequence, or + * * false otherwise. + */ +static __always_inline bool +pvr_cccb_cmdseq_can_fit(struct pvr_cccb *pvr_cccb, size_t size) +{ + /* We divide the capacity by two to simplify our CCCB fencing logic: + * we want to be sure that, no matter what we had queued before, we + * are able to either queue our command sequence at the end or add a + * padding command and queue the command sequence at the beginning + * of the CCCB. If the command sequence size is bigger than half the + * CCCB capacity, we'd have to queue the padding command and make sure + * the FW is done processing it before queueing our command sequence. + */ + return size + PADDING_COMMAND_SIZE <= pvr_cccb->size / 2; +} + +#endif /* PVR_CCCB_H */ |