1 // SPDX-License-Identifier: MIT
3 * Copyright © 2023 Intel Corporation
6 #include "xe_gsc_submit.h"
8 #include "abi/gsc_command_header_abi.h"
10 #include "xe_exec_queue.h"
11 #include "xe_gt_printk.h"
12 #include "xe_gt_types.h"
14 #include "xe_sched_job.h"
15 #include "instructions/xe_gsc_commands.h"
16 #include "regs/xe_gsc_regs.h"
18 #define GSC_HDR_SIZE (sizeof(struct intel_gsc_mtl_header)) /* shorthand define */
20 #define mtl_gsc_header_wr(xe_, map_, offset_, field_, val_) \
21 xe_map_wr_field(xe_, map_, offset_, struct intel_gsc_mtl_header, field_, val_)
23 #define mtl_gsc_header_rd(xe_, map_, offset_, field_) \
24 xe_map_rd_field(xe_, map_, offset_, struct intel_gsc_mtl_header, field_)
27 * GSC FW allows us to define the host_session_handle as we see fit, as long
28 * as we use unique identifier for each user, with handle 0 being reserved for
30 * To be able to differentiate which client subsystem owns the given session, we
31 * include the client id in the top 8 bits of the handle.
33 #define HOST_SESSION_CLIENT_MASK GENMASK_ULL(63, 56)
36 gsc_to_gt(struct xe_gsc *gsc)
38 return container_of(gsc, struct xe_gt, uc.gsc);
42 * xe_gsc_emit_header - write the MTL GSC header in memory
44 * @map: the iosys map to write to
45 * @offset: offset from the start of the map at which to write the header
46 * @heci_client_id: client id identifying the type of command (see abi for values)
47 * @host_session_id: host session ID of the caller
48 * @payload_size: size of the payload that follows the header
50 * Returns: offset memory location following the header
52 u32 xe_gsc_emit_header(struct xe_device *xe, struct iosys_map *map, u32 offset,
53 u8 heci_client_id, u64 host_session_id, u32 payload_size)
55 xe_assert(xe, !(host_session_id & HOST_SESSION_CLIENT_MASK));
58 host_session_id |= FIELD_PREP(HOST_SESSION_CLIENT_MASK, heci_client_id);
60 xe_map_memset(xe, map, offset, 0, GSC_HDR_SIZE);
62 mtl_gsc_header_wr(xe, map, offset, validity_marker, GSC_HECI_VALIDITY_MARKER);
63 mtl_gsc_header_wr(xe, map, offset, heci_client_id, heci_client_id);
64 mtl_gsc_header_wr(xe, map, offset, host_session_handle, host_session_id);
65 mtl_gsc_header_wr(xe, map, offset, header_version, MTL_GSC_HEADER_VERSION);
66 mtl_gsc_header_wr(xe, map, offset, message_size, payload_size + GSC_HDR_SIZE);
68 return offset + GSC_HDR_SIZE;
72 * xe_gsc_check_and_update_pending - check the pending bit and update the input
73 * header with the retry handle from the output header
75 * @in: the iosys map containing the input buffer
76 * @offset_in: offset within the iosys at which the input buffer is located
77 * @out: the iosys map containing the output buffer
78 * @offset_out: offset within the iosys at which the output buffer is located
80 * Returns: true if the pending bit was set, false otherwise
82 bool xe_gsc_check_and_update_pending(struct xe_device *xe,
83 struct iosys_map *in, u32 offset_in,
84 struct iosys_map *out, u32 offset_out)
86 if (mtl_gsc_header_rd(xe, out, offset_out, flags) & GSC_OUTFLAG_MSG_PENDING) {
87 u64 handle = mtl_gsc_header_rd(xe, out, offset_out, gsc_message_handle);
89 mtl_gsc_header_wr(xe, in, offset_in, gsc_message_handle, handle);
98 * xe_gsc_read_out_header - reads and validates the output header and returns
99 * the offset of the reply following the header
101 * @map: the iosys map containing the output buffer
102 * @offset: offset within the iosys at which the output buffer is located
103 * @min_payload_size: minimum size of the message excluding the gsc header
104 * @payload_offset: optional pointer to be set to the payload offset
106 * Returns: -errno value on failure, 0 otherwise
108 int xe_gsc_read_out_header(struct xe_device *xe,
109 struct iosys_map *map, u32 offset,
110 u32 min_payload_size,
113 u32 marker = mtl_gsc_header_rd(xe, map, offset, validity_marker);
114 u32 size = mtl_gsc_header_rd(xe, map, offset, message_size);
115 u32 payload_size = size - GSC_HDR_SIZE;
117 if (marker != GSC_HECI_VALIDITY_MARKER)
120 if (size < GSC_HDR_SIZE || payload_size < min_payload_size)
124 *payload_offset = offset + GSC_HDR_SIZE;
130 * xe_gsc_pkt_submit_kernel - submit a kernel heci pkt to the GSC
132 * @addr_in: GGTT address of the message to send to the GSC
133 * @size_in: size of the message to send to the GSC
134 * @addr_out: GGTT address for the GSC to write the reply to
135 * @size_out: size of the memory reserved for the reply
137 int xe_gsc_pkt_submit_kernel(struct xe_gsc *gsc, u64 addr_in, u32 size_in,
138 u64 addr_out, u32 size_out)
140 struct xe_gt *gt = gsc_to_gt(gsc);
142 struct xe_sched_job *job;
143 struct dma_fence *fence;
146 if (size_in < GSC_HDR_SIZE)
149 if (size_out < GSC_HDR_SIZE)
152 bb = xe_bb_new(gt, 8, false);
156 bb->cs[bb->len++] = GSC_HECI_CMD_PKT;
157 bb->cs[bb->len++] = lower_32_bits(addr_in);
158 bb->cs[bb->len++] = upper_32_bits(addr_in);
159 bb->cs[bb->len++] = size_in;
160 bb->cs[bb->len++] = lower_32_bits(addr_out);
161 bb->cs[bb->len++] = upper_32_bits(addr_out);
162 bb->cs[bb->len++] = size_out;
163 bb->cs[bb->len++] = 0;
165 job = xe_bb_create_job(gsc->q, bb);
167 xe_bb_free(bb, NULL);
171 xe_sched_job_arm(job);
172 fence = dma_fence_get(&job->drm.s_fence->finished);
173 xe_sched_job_push(job);
175 timeout = dma_fence_wait_timeout(fence, false, HZ);
176 dma_fence_put(fence);
177 xe_bb_free(bb, NULL);