drm backend: implement DRM lease issuance
This commit is contained in:
Drew DeVault
parent
05ed202183
commit
1b96ba8232
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@ -269,6 +269,7 @@ bool init_drm_resources(struct wlr_drm_backend *drm) {
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struct wlr_drm_crtc *crtc = &drm->crtcs[i];
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crtc->id = res->crtcs[i];
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crtc->legacy_crtc = drmModeGetCrtc(drm->fd, crtc->id);
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crtc->lessee_id = 0;
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get_drm_crtc_props(drm->fd, crtc->id, &crtc->props);
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}
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@ -578,6 +579,8 @@ static void drm_connector_cleanup(struct wlr_drm_connector *conn);
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bool drm_connector_set_mode(struct wlr_output *output,
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struct wlr_output_mode *mode) {
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struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
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assert(conn->state != WLR_DRM_CONN_LEASED
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&& "Use of leased connector is a programming error");
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struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
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if (conn->crtc == NULL) {
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// Maybe we can steal a CRTC from a disabled output
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@ -618,6 +621,8 @@ bool drm_connector_set_mode(struct wlr_output *output,
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bool wlr_drm_connector_add_mode(struct wlr_output *output,
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const drmModeModeInfo *modeinfo) {
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struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
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assert(conn->state != WLR_DRM_CONN_LEASED
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&& "Use of leased connector is a programming error");
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if (modeinfo->type != DRM_MODE_TYPE_USERDEF) {
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return false;
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@ -654,6 +659,8 @@ static bool drm_connector_set_cursor(struct wlr_output *output,
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enum wl_output_transform transform,
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int32_t hotspot_x, int32_t hotspot_y, bool update_texture) {
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struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
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assert((conn->state != WLR_DRM_CONN_LEASED || texture == NULL)
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&& "Use of leased connector is a programming error");
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struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
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struct wlr_drm_crtc *crtc = conn->crtc;
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@ -791,6 +798,8 @@ static bool drm_connector_set_cursor(struct wlr_output *output,
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static bool drm_connector_move_cursor(struct wlr_output *output,
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int x, int y) {
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struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
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assert(conn->state != WLR_DRM_CONN_LEASED
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&& "Use of leased connector is a programming error");
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struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
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if (!conn->crtc) {
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return false;
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@ -827,6 +836,8 @@ static bool drm_connector_move_cursor(struct wlr_output *output,
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static bool drm_connector_schedule_frame(struct wlr_output *output) {
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struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
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assert(conn->state != WLR_DRM_CONN_LEASED
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&& "Use of leased connector is a programming error");
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struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
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if (!drm->session->active) {
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return false;
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@ -878,6 +889,8 @@ static uint32_t strip_alpha_channel(uint32_t format) {
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static bool drm_connector_attach_buffer(struct wlr_output *output,
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struct wlr_buffer *buffer) {
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struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
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assert(conn->state != WLR_DRM_CONN_LEASED
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&& "Use of leased connector is a programming error");
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struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
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if (!drm->session->active) {
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return false;
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@ -919,6 +932,9 @@ static bool drm_connector_attach_buffer(struct wlr_output *output,
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static void drm_connector_destroy(struct wlr_output *output) {
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struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
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if (conn->state == WLR_DRM_CONN_LEASED) {
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return;
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}
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drm_connector_cleanup(conn);
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drmModeFreeCrtc(conn->old_crtc);
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wl_event_source_remove(conn->retry_pageflip);
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@ -996,10 +1012,17 @@ static void realloc_crtcs(struct wlr_drm_backend *drm) {
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uint32_t new_match[drm->num_crtcs];
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for (size_t i = 0; i < drm->num_crtcs; ++i) {
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if (drm->crtcs[i].lessee_id != 0) {
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/* Do not consider leased CRTCs */
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previous_match[i] = SKIP;
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} else {
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previous_match[i] = UNMATCHED;
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}
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}
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wlr_log(WLR_DEBUG, "State before reallocation:");
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wlr_log(WLR_DEBUG, "noutputs: %zd; ncrtc: %zd",
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num_outputs, drm->num_crtcs);
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size_t i = 0;
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struct wlr_drm_connector *conn;
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wl_list_for_each(conn, &drm->outputs, link) {
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@ -1037,7 +1060,7 @@ static void realloc_crtcs(struct wlr_drm_backend *drm) {
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connector_match[i] = -1;
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}
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for (size_t i = 0; i < drm->num_crtcs; ++i) {
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if (new_match[i] != UNMATCHED) {
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if (new_match[i] != UNMATCHED && new_match[i] != SKIP) {
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connector_match[new_match[i]] = i;
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}
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}
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@ -1149,6 +1172,15 @@ static uint32_t get_possible_crtcs(int fd, drmModeRes *res,
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return ret;
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}
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static void drm_conn_init_wlr_output(struct wlr_drm_backend *drm,
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struct wlr_drm_connector *wlr_conn, drmModeConnector *drm_conn) {
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wlr_output_init(&wlr_conn->output,
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&drm->backend, &output_impl, drm->display);
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snprintf(wlr_conn->output.name, sizeof(wlr_conn->output.name),
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"%s-%"PRIu32, conn_get_name(drm_conn->connector_type),
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drm_conn->connector_type_id);
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}
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void scan_drm_connectors(struct wlr_drm_backend *drm) {
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/*
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* This GPU is not really a modesetting device.
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@ -1174,6 +1206,14 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
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size_t new_outputs_len = 0;
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struct wlr_drm_connector *new_outputs[res->count_connectors + 1];
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drmModeLesseeListPtr lessees = drmModeListLessees(drm->fd);
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if (lessees->count > 0) {
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wlr_log(WLR_INFO, "With active leases:");
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for (uint32_t i = 0; i < lessees->count; ++i) {
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wlr_log(WLR_INFO, "%d", lessees->lessees[i]);
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}
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}
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for (int i = 0; i < res->count_connectors; ++i) {
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drmModeConnector *drm_conn = drmModeGetConnector(drm->fd,
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res->connectors[i]);
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@ -1202,8 +1242,8 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
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drmModeFreeConnector(drm_conn);
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continue;
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}
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wlr_output_init(&wlr_conn->output, &drm->backend, &output_impl,
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drm->display);
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drm_conn_init_wlr_output(drm, wlr_conn, drm_conn);
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struct wl_event_loop *ev = wl_display_get_event_loop(drm->display);
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wlr_conn->retry_pageflip = wl_event_loop_add_timer(
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@ -1212,16 +1252,13 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
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wlr_conn->state = WLR_DRM_CONN_DISCONNECTED;
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wlr_conn->id = drm_conn->connector_id;
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snprintf(wlr_conn->output.name, sizeof(wlr_conn->output.name),
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"%s-%"PRIu32, conn_get_name(drm_conn->connector_type),
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drm_conn->connector_type_id);
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if (curr_enc) {
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wlr_conn->old_crtc = drmModeGetCrtc(drm->fd, curr_enc->crtc_id);
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}
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wl_list_insert(drm->outputs.prev, &wlr_conn->link);
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wlr_log(WLR_INFO, "Found connector '%s'", wlr_conn->output.name);
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wlr_log(WLR_INFO, "Found connector '%s' (%d)",
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wlr_conn->output.name, drm_conn->connector_id);
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} else {
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seen[index] = true;
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}
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@ -1255,6 +1292,33 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
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}
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}
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if (wlr_conn->state == WLR_DRM_CONN_LEASED) {
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/* Was the lease terminated? */
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bool found = false;
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for (uint32_t n = 0; n < lessees->count; ++n) {
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if (lessees->lessees[n] == wlr_conn->lessee_id) {
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found = true;
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}
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}
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if (!found) {
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/* Yes, it was */
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wlr_log(WLR_DEBUG, "DRM lease %d terminated by kernel",
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wlr_conn->lessee_id);
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wlr_conn->state = WLR_DRM_CONN_DISCONNECTED;
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wlr_conn->lessee_id = 0;
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for (size_t i = 0; i < drm->num_crtcs; ++i) {
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if (drm->crtcs[i].lessee_id == wlr_conn->lessee_id) {
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drm->crtcs[i].lessee_id = 0;
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}
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}
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if (wlr_conn->lease_terminated_cb != NULL) {
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wlr_conn->lease_terminated_cb(
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wlr_conn, wlr_conn->lease_terminated_data);
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}
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drm_conn_init_wlr_output(drm, wlr_conn, drm_conn);
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}
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}
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if (wlr_conn->state == WLR_DRM_CONN_DISCONNECTED &&
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drm_conn->connection == DRM_MODE_CONNECTED) {
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wlr_log(WLR_INFO, "'%s' connected", wlr_conn->output.name);
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@ -1476,7 +1540,7 @@ void restore_drm_outputs(struct wlr_drm_backend *drm) {
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wl_list_for_each(conn, &drm->outputs, link) {
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drmModeCrtc *crtc = conn->old_crtc;
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if (!crtc) {
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if (!crtc || conn->state == WLR_DRM_CONN_LEASED) {
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continue;
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}
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@ -1531,7 +1595,87 @@ static void drm_connector_cleanup(struct wlr_drm_connector *conn) {
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break;
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case WLR_DRM_CONN_DISCONNECTED:
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break;
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case WLR_DRM_CONN_LEASED:
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return; // don't change state
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}
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conn->state = WLR_DRM_CONN_DISCONNECTED;
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}
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int drm_create_lease(struct wlr_drm_backend *backend,
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struct wlr_drm_connector **conns, int nconns, uint32_t *lessee_id,
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void (*lease_terminated_cb)(struct wlr_drm_connector *, void *),
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void *lease_terminated_data) {
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int nobjects = 0;
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for (int i = 0; i < nconns; ++i) {
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struct wlr_drm_connector *conn = conns[i];
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assert(conn->state != WLR_DRM_CONN_LEASED);
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nobjects += 0
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+ 1 /* connector */
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+ 1 /* crtc */
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+ 1 /* primary plane */
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+ (conn->crtc->cursor != NULL ? 1 : 0) /* cursor plane */
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+ conn->crtc->num_overlays; /* overlay planes */
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}
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if (nobjects <= 0) {
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wlr_log(WLR_ERROR, "Attempted DRM lease with <= 0 objects");
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return -1;
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}
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wlr_log(WLR_DEBUG, "Issuing DRM lease with the %d objects:", nobjects);
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uint32_t objects[nobjects + 1];
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for (int i = 0, j = 0; i < nconns; ++i) {
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struct wlr_drm_connector *conn = conns[i];
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objects[j++] = conn->id;
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objects[j++] = conn->crtc->id;
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objects[j++] = conn->crtc->primary->id;
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wlr_log(WLR_DEBUG, "connector: %d crtc: %d primary plane: %d",
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conn->id, conn->crtc->id, conn->crtc->primary->id);
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if (conn->crtc->cursor) {
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wlr_log(WLR_DEBUG, "cursor plane: %d", conn->crtc->cursor->id);
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objects[j++] = conn->crtc->cursor->id;
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}
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if (conn->crtc->num_overlays > 0) {
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wlr_log(WLR_DEBUG, "+%zd overlay planes:", conn->crtc->num_overlays);
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}
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for (size_t k = 0; k < conn->crtc->num_overlays; ++k) {
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objects[j++] = conn->crtc->overlays[k];
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wlr_log(WLR_DEBUG, "\toverlay plane: %d", conn->crtc->overlays[k]);
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}
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}
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int lease_fd = drmModeCreateLease(backend->fd,
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objects, nobjects, 0, lessee_id);
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if (lease_fd < 0) {
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return lease_fd;
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}
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wlr_log(WLR_DEBUG, "Issued DRM lease %d", *lessee_id);
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for (int i = 0; i < nconns; ++i) {
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struct wlr_drm_connector *conn = conns[i];
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conn->lessee_id = *lessee_id;
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conn->crtc->lessee_id = *lessee_id;
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conn->state = WLR_DRM_CONN_LEASED;
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conn->lease_terminated_cb = lease_terminated_cb;
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conn->lease_terminated_data = lease_terminated_data;
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wlr_output_destroy(&conn->output);
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}
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return lease_fd;
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}
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int drm_terminate_lease(struct wlr_drm_backend *backend, uint32_t lessee_id) {
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wlr_log(WLR_DEBUG, "Terminating DRM lease %d", lessee_id);
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int r = drmModeRevokeLease(backend->fd, lessee_id);
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struct wlr_drm_connector *conn;
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wl_list_for_each(conn, &backend->outputs, link) {
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if (conn->state == WLR_DRM_CONN_LEASED
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&& conn->lessee_id == lessee_id) {
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conn->state = WLR_DRM_CONN_DISCONNECTED;
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conn->lessee_id = 0;
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}
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}
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for (size_t i = 0; i < backend->num_crtcs; ++i) {
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if (backend->crtcs[i].lessee_id == lessee_id) {
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backend->crtcs[i].lessee_id = 0;
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}
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}
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scan_drm_connectors(backend);
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return r;
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}
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@ -47,6 +47,8 @@ struct wlr_drm_crtc {
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// Legacy only
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drmModeCrtc *legacy_crtc;
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uint32_t lessee_id;
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struct wlr_drm_plane *primary;
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struct wlr_drm_plane *cursor;
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@ -98,6 +100,8 @@ enum wlr_drm_connector_state {
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WLR_DRM_CONN_NEEDS_MODESET,
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WLR_DRM_CONN_CLEANUP,
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WLR_DRM_CONN_CONNECTED,
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// Connector has been leased to another DRM master
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WLR_DRM_CONN_LEASED,
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};
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struct wlr_drm_mode {
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@ -112,6 +116,9 @@ struct wlr_drm_connector {
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struct wlr_output_mode *desired_mode;
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bool desired_enabled;
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uint32_t id;
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uint32_t lessee_id;
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void (*lease_terminated_cb)(struct wlr_drm_connector *, void *);
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void *lease_terminated_data;
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struct wlr_drm_crtc *crtc;
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uint32_t possible_crtc;
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@ -149,4 +156,11 @@ bool set_drm_connector_gamma(struct wlr_output *output, size_t size,
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bool drm_connector_set_mode(struct wlr_output *output,
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struct wlr_output_mode *mode);
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/** Returns the leased file descriptor */
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int drm_create_lease(struct wlr_drm_backend *backend,
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struct wlr_drm_connector **conns, int nconns, uint32_t *lessee_id,
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void (*lease_terminated_cb)(struct wlr_drm_connector *, void *),
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void *lease_terminated_data);
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int drm_terminate_lease(struct wlr_drm_backend *backend, uint32_t lessee_id);
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#endif
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