0881cbe040
The version is obtained via a dedicated MKHI GSC HECI command. The compatibility version is what we want to match against for the GSC, so we need to call the FW version checker after obtaining the version. Since this is the first time we send a GSC HECI command via the GSCCS, this patch also introduces common infrastructure to send such commands to the GSC. Communication with the GSC FW is done via input/output buffers, whose addresses are provided via a GSCCS command. The buffers contain a generic header and a client-specific packet (e.g. PXP, HDCP); the clients don't care about the header format and/or the GSCCS command in the batch, they only care about their client-specific header. This patch therefore introduces helpers that allow the callers to automatically fill in the input header, submit the GSCCS job and decode the output header, to make it so that the caller only needs to worry about their client-specific input and output messages. v3: squash of 2 separate patches ahead of merge, so that the common functions and their first user are added at the same time Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Alan Previn <alan.previn.teres.alexis@intel.com> Cc: Suraj Kandpal <suraj.kandpal@intel.com> Cc: John Harrison <John.C.Harrison@Intel.com> Reviewed-by: John Harrison <John.C.Harrison@Intel.Com> #v1 Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
36 lines
1.2 KiB
C
36 lines
1.2 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2023 Intel Corporation
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*/
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#ifndef _XE_GSC_COMMANDS_H_
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#define _XE_GSC_COMMANDS_H_
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#include "instructions/xe_instr_defs.h"
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/*
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* All GSCCS-specific commands have fixed length, so we can include it in the
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* defines. Note that the generic GSC command header structure includes an
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* optional data field in bits 9-21, but there are no commands that actually use
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* it; some of the commands are instead defined as having an extended length
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* field spanning bits 0-15, even if the extra bits are not required because the
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* longest GSCCS command is only 8 dwords. To handle this, the defines below use
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* a single field for both data and len. If we ever get a commands that does
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* actually have data and this approach doesn't work for it we can re-work it
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* at that point.
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*/
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#define GSC_OPCODE REG_GENMASK(28, 22)
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#define GSC_CMD_DATA_AND_LEN REG_GENMASK(21, 0)
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#define __GSC_INSTR(op, dl) \
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(XE_INSTR_GSC | \
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REG_FIELD_PREP(GSC_OPCODE, op) | \
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REG_FIELD_PREP(GSC_CMD_DATA_AND_LEN, dl))
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#define GSC_HECI_CMD_PKT __GSC_INSTR(0, 6)
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#define GSC_FW_LOAD __GSC_INSTR(1, 2)
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#define GSC_FW_LOAD_LIMIT_VALID REG_BIT(31)
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#endif
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