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-rw-r--r--legacy-driver-guest/bar/gsp_bar.c242
1 files changed, 0 insertions, 242 deletions
diff --git a/legacy-driver-guest/bar/gsp_bar.c b/legacy-driver-guest/bar/gsp_bar.c
deleted file mode 100644
index aa3ed62..0000000
--- a/legacy-driver-guest/bar/gsp_bar.c
+++ /dev/null
@@ -1,242 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * GSP vGPU-IO Driver - BAR Emulation
- */
-
-#include "gsp_core.h"
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-
-/* BAR Emulation Ops */
-static int gsp_bar_trap_handler(struct gsp_vf *vf, struct gsp_bar_trap_payload *trap)
-{
- struct gsp_bar_state *bar = &vf->bar_state;
- struct gsp_bar_trap_response resp = {0};
- size_t resp_size = sizeof(resp);
- int ret;
-
- /* Validate BAR index (we only support BAR1) */
- if (trap->bar_index != 1)
- return -EINVAL;
-
- /* Validate offset */
- if (trap->offset >= bar->aperture_size)
- return -ERANGE;
-
- /* Check ForceBarAccess */
- if (bar->force_access && vf->id != bar->force_vf)
- return -EPERM;
-
- /* In emulation mode, handle locally */
- if (emulation_mode) {
- /* Simulate BAR trap handling */
- if (trap->trap_type == GSP_BAR_WRITE) {
- /* Config write - update aperture */
- bar->aperture_offset = trap->offset;
- bar->aperture_size = trap->value;
- } else if (trap->trap_type == GSP_BAR_ATOMIC) {
- /* Force access control */
- bar->force_access = trap->offset ? true : false;
- bar->force_vf = trap->offset ? vf->id : 0;
- }
- resp.value = 0;
- return 0;
- }
-
- /* Forward to GSP BAR trap handler (0x04CB8188) */
- ret = gsp_rpc_send_sync(vf->gsp->rpc, GSP_RPC_BAR_TRAP,
- trap, sizeof(*trap), &resp, &resp_size);
-
- return ret;
-}
-
-/* Aperture Configuration */
-static int gsp_bar_config_aperture(struct gsp_vf *vf, uint64_t offset, uint64_t size)
-{
- struct gsp_bar_state *bar = &vf->bar_state;
- struct gsp_bar_trap_payload payload = {0};
- struct gsp_bar_trap_response resp = {0};
- size_t resp_size = sizeof(resp);
- int ret;
-
- /* Validate alignment (4KB) */
- if (offset & 0xFFF || size & 0xFFF)
- return -EINVAL;
-
- /* Validate max size (256KB per firmware) */
- if (size > 0x40000)
- return -EINVAL;
-
- /* In emulation mode, handle locally */
- if (emulation_mode) {
- bar->aperture_offset = offset;
- bar->aperture_size = size;
- return 0;
- }
-
- payload.bar_index = 1;
- payload.trap_type = GSP_BAR_WRITE; /* Config write */
- payload.offset = offset;
- payload.value = size;
- payload.size = 8;
- payload.vf_id = vf->id;
-
- ret = gsp_rpc_send_sync(vf->gsp->rpc, GSP_RPC_BAR_TRAP,
- &payload, sizeof(payload), &resp, &resp_size);
- if (!ret) {
- bar->aperture_offset = offset;
- bar->aperture_size = size;
- }
-
- return ret;
-}
-
-/* ForceBarAccess Control */
-int gsp_bar_force_access(struct gsp_vf *vf, bool enable)
-{
- struct gsp_bar_state *bar = &vf->bar_state;
- struct gsp_bar_trap_payload payload = {0};
- struct gsp_bar_trap_response resp = {0};
- size_t resp_size = sizeof(resp);
- int ret;
-
- /* In emulation mode, handle locally */
- if (emulation_mode) {
- bar->force_access = enable;
- bar->force_vf = enable ? vf->id : 0;
- return 0;
- }
-
- payload.bar_index = 1;
- payload.trap_type = GSP_BAR_ATOMIC; /* Force access control */
- payload.offset = enable ? 1 : 0;
- payload.value = enable ? vf->id : 0;
- payload.size = 8;
- payload.vf_id = vf->id;
-
- ret = gsp_rpc_send_sync(vf->gsp->rpc, GSP_RPC_BAR_TRAP,
- &payload, sizeof(payload), &resp, &resp_size);
- if (!ret) {
- bar->force_access = enable;
- bar->force_vf = enable ? vf->id : 0;
- }
-
- return ret;
-}
-
-/* State Save for Migration */
-static int gsp_bar_save_state(struct gsp_vf *vf, void *buf, size_t *size)
-{
- struct gsp_bar_state *bar = &vf->bar_state;
- size_t needed = sizeof(*bar) + bar->backing_size;
-
- if (!buf || *size < needed)
- return -ENOSPC;
-
- memcpy(buf, bar, sizeof(*bar));
- if (bar->backing_store && bar->backing_size > 0)
- memcpy(buf + sizeof(*bar), bar->backing_store, bar->backing_size);
-
- *size = needed;
- return 0;
-}
-
-/* State Restore for Migration */
-static int gsp_bar_restore_state(struct gsp_vf *vf, void *buf, size_t size)
-{
- struct gsp_bar_state *bar = &vf->bar_state;
- size_t min_size = sizeof(*bar);
-
- if (!buf || size < min_size)
- return -EINVAL;
-
- memcpy(bar, buf, sizeof(*bar));
-
- if (size > min_size && bar->backing_size > 0) {
- if (!bar->backing_store) {
- bar->backing_store = vzalloc(bar->backing_size);
- if (!bar->backing_store)
- return -ENOMEM;
- }
- memcpy(bar->backing_store, buf + min_size,
- min(size - min_size, bar->backing_size));
- }
-
- /* Reconfigure BAR in GSP */
- return gsp_bar_config_aperture(vf, bar->aperture_offset, bar->aperture_size);
-}
-
-/* VF BAR Initialization */
-int gsp_vf_bar_init(struct gsp_vf *vf)
-{
- struct gsp_bar_state *bar = &vf->bar_state;
- int ret;
-
- /* Initialize with config values */
- bar->aperture_offset = vf->bar1_offset;
- bar->aperture_size = vf->bar1_size;
- bar->force_access = false;
- bar->force_vf = 0;
- bar->backing_store = NULL;
- bar->backing_size = 0;
-
- /* Allocate backing store (max 256KB) */
- if (bar->aperture_size > 0) {
- bar->backing_size = min(bar->aperture_size, (uint64_t)0x40000);
- bar->backing_store = vzalloc(bar->backing_size);
- if (!bar->backing_store)
- return -ENOMEM;
- }
-
- /* Configure aperture in GSP (skip in emulation mode) */
- if (!emulation_mode) {
- ret = gsp_bar_config_aperture(vf, bar->aperture_offset, bar->aperture_size);
- if (ret) {
- dev_err(vf->gsp->dev, "VF %u: BAR aperture config failed: %d\n", vf->id, ret);
- goto err_backing;
- }
- } else {
- dev_info(vf->gsp->dev, "VF %u: BAR1 initialized in emulation mode [0x%llx, 0x%llx)\n",
- vf->id, bar->aperture_offset, bar->aperture_offset + bar->aperture_size);
- }
-
- dev_info(vf->gsp->dev, "VF %u: BAR1 initialized [0x%llx, 0x%llx)\n",
- vf->id, bar->aperture_offset, bar->aperture_offset + bar->aperture_size);
-
- return 0;
-
-err_backing:
- vfree(bar->backing_store);
- bar->backing_store = NULL;
- bar->backing_size = 0;
- return ret;
-}
-
-/* VF BAR Cleanup */
-void gsp_vf_bar_fini(struct gsp_vf *vf)
-{
- struct gsp_bar_state *bar = &vf->bar_state;
-
- vfree(bar->backing_store);
- bar->backing_store = NULL;
- bar->backing_size = 0;
-
- dev_info(vf->gsp->dev, "VF %u: BAR1 cleaned up\n", vf->id);
-}
-
-/* BAR Trap Entry Point (called from ISR/notification) */
-int gsp_vf_bar_trap(struct gsp_vf *vf, struct gsp_bar_trap_payload *trap)
-{
- return gsp_bar_trap_handler(vf, trap);
-}
-
-/* Migration Interface */
-int gsp_migration_bar_save(struct gsp_vf *vf, void *buf, size_t *size)
-{
- return gsp_bar_save_state(vf, buf, size);
-}
-
-int gsp_migration_bar_restore(struct gsp_vf *vf, void *buf, size_t size)
-{
- return gsp_bar_restore_state(vf, buf, size);
-} \ No newline at end of file
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