| Message ID | 1539059262-8326-3-git-send-email-jsanka@codeaurora.org (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Delegated to: | Andy Gross |
| Headers | show |
| Series | reserve RM resources in CRTC state | expand |
On Mon, Oct 08, 2018 at 09:27:19PM -0700, Jeykumar Sankaran wrote: > RM was equipped with reservation tracking structure RSVP > to cache HW reservation of displays for certain clients > where atomic_checks (atomic commit with TEST_ONLY) for all > the displays are called before their respective atomic_commits. > Since DPU doesn't support the sequence anymore, clean up > the support from RM. Replace rsvp with the corresponding > encoder id to tag the HW blocks reserved. > Can you put something to the effect of "This is temporary and removed in a future patch" in the commit message? Reviewed-by: Sean Paul <seanpaul@chromium.org> > Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org> > --- > drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c | 284 +++++---------------------------- > drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h | 4 - > 2 files changed, 43 insertions(+), 245 deletions(-) > > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c > index bdb1177..36a929b 100644 > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c > @@ -21,8 +21,8 @@ > #include "dpu_encoder.h" > #include "dpu_trace.h" > > -#define RESERVED_BY_OTHER(h, r) \ > - ((h)->rsvp && ((h)->rsvp->enc_id != (r)->enc_id)) > +#define RESERVED_BY_OTHER(h, r) \ > + ((h)->enc_id && (h)->enc_id != r) > > /** > * struct dpu_rm_requirements - Reservation requirements parameter bundle > @@ -34,85 +34,23 @@ struct dpu_rm_requirements { > struct dpu_encoder_hw_resources hw_res; > }; > > -/** > - * struct dpu_rm_rsvp - Use Case Reservation tagging structure > - * Used to tag HW blocks as reserved by a CRTC->Encoder->Connector chain > - * By using as a tag, rather than lists of pointers to HW blocks used > - * we can avoid some list management since we don't know how many blocks > - * of each type a given use case may require. > - * @list: List head for list of all reservations > - * @seq: Global RSVP sequence number for debugging, especially for > - * differentiating differenct allocations for same encoder. > - * @enc_id: Reservations are tracked by Encoder DRM object ID. > - * CRTCs may be connected to multiple Encoders. > - * An encoder or connector id identifies the display path. > - */ > -struct dpu_rm_rsvp { > - struct list_head list; > - uint32_t seq; > - uint32_t enc_id; > -}; > > /** > * struct dpu_rm_hw_blk - hardware block tracking list member > * @list: List head for list of all hardware blocks tracking items > - * @rsvp: Pointer to use case reservation if reserved by a client > - * @rsvp_nxt: Temporary pointer used during reservation to the incoming > - * request. Will be swapped into rsvp if proposal is accepted > * @type: Type of hardware block this structure tracks > * @id: Hardware ID number, within it's own space, ie. LM_X > - * @catalog: Pointer to the hardware catalog entry for this block > + * @enc_id: Encoder id to which this blk is binded > * @hw: Pointer to the hardware register access object for this block > */ > struct dpu_rm_hw_blk { > struct list_head list; > - struct dpu_rm_rsvp *rsvp; > - struct dpu_rm_rsvp *rsvp_nxt; > enum dpu_hw_blk_type type; > uint32_t id; > + uint32_t enc_id; > struct dpu_hw_blk *hw; > }; > > -/** > - * dpu_rm_dbg_rsvp_stage - enum of steps in making reservation for event logging > - */ > -enum dpu_rm_dbg_rsvp_stage { > - DPU_RM_STAGE_BEGIN, > - DPU_RM_STAGE_AFTER_CLEAR, > - DPU_RM_STAGE_AFTER_RSVPNEXT, > - DPU_RM_STAGE_FINAL > -}; > - > -static void _dpu_rm_print_rsvps( > - struct dpu_rm *rm, > - enum dpu_rm_dbg_rsvp_stage stage) > -{ > - struct dpu_rm_rsvp *rsvp; > - struct dpu_rm_hw_blk *blk; > - enum dpu_hw_blk_type type; > - > - DPU_DEBUG("%d\n", stage); > - > - list_for_each_entry(rsvp, &rm->rsvps, list) { > - DRM_DEBUG_KMS("%d rsvp[s%ue%u]\n", stage, rsvp->seq, > - rsvp->enc_id); > - } > - > - for (type = 0; type < DPU_HW_BLK_MAX; type++) { > - list_for_each_entry(blk, &rm->hw_blks[type], list) { > - if (!blk->rsvp && !blk->rsvp_nxt) > - continue; > - > - DRM_DEBUG_KMS("%d rsvp[s%ue%u->s%ue%u] %d %d\n", stage, > - (blk->rsvp) ? blk->rsvp->seq : 0, > - (blk->rsvp) ? blk->rsvp->enc_id : 0, > - (blk->rsvp_nxt) ? blk->rsvp_nxt->seq : 0, > - (blk->rsvp_nxt) ? blk->rsvp_nxt->enc_id : 0, > - blk->type, blk->id); > - } > - } > -} > - > struct dpu_hw_mdp *dpu_rm_get_mdp(struct dpu_rm *rm) > { > return rm->hw_mdp; > @@ -148,15 +86,13 @@ static bool _dpu_rm_get_hw_locked(struct dpu_rm *rm, struct dpu_rm_hw_iter *i) > i->blk = list_prepare_entry(i->blk, blk_list, list); > > list_for_each_entry_continue(i->blk, blk_list, list) { > - struct dpu_rm_rsvp *rsvp = i->blk->rsvp; > - > if (i->blk->type != i->type) { > DPU_ERROR("found incorrect block type %d on %d list\n", > i->blk->type, i->type); > return false; > } > > - if ((i->enc_id == 0) || (rsvp && rsvp->enc_id == i->enc_id)) { > + if (i->enc_id == i->blk->enc_id) { > i->hw = i->blk->hw; > DPU_DEBUG("found type %d id %d for enc %d\n", > i->type, i->blk->id, i->enc_id); > @@ -208,22 +144,9 @@ static void _dpu_rm_hw_destroy(enum dpu_hw_blk_type type, void *hw) > > int dpu_rm_destroy(struct dpu_rm *rm) > { > - > - struct dpu_rm_rsvp *rsvp_cur, *rsvp_nxt; > struct dpu_rm_hw_blk *hw_cur, *hw_nxt; > enum dpu_hw_blk_type type; > > - if (!rm) { > - DPU_ERROR("invalid rm\n"); > - return -EINVAL; > - } > - > - list_for_each_entry_safe(rsvp_cur, rsvp_nxt, &rm->rsvps, list) { > - list_del(&rsvp_cur->list); > - kfree(rsvp_cur); > - } > - > - > for (type = 0; type < DPU_HW_BLK_MAX; type++) { > list_for_each_entry_safe(hw_cur, hw_nxt, &rm->hw_blks[type], > list) { > @@ -293,6 +216,7 @@ static int _dpu_rm_hw_blk_create( > blk->type = type; > blk->id = id; > blk->hw = hw; > + blk->enc_id = 0; > list_add_tail(&blk->list, &rm->hw_blks[type]); > > return 0; > @@ -316,7 +240,6 @@ int dpu_rm_init(struct dpu_rm *rm, > > mutex_init(&rm->rm_lock); > > - INIT_LIST_HEAD(&rm->rsvps); > for (type = 0; type < DPU_HW_BLK_MAX; type++) > INIT_LIST_HEAD(&rm->hw_blks[type]); > > @@ -410,7 +333,7 @@ static bool _dpu_rm_needs_split_display(const struct msm_display_topology *top) > * proposed use case requirements, incl. hardwired dependent blocks like > * pingpong > * @rm: dpu resource manager handle > - * @rsvp: reservation currently being created > + * @enc_id: encoder id requesting for allocation > * @reqs: proposed use case requirements > * @lm: proposed layer mixer, function checks if lm, and all other hardwired > * blocks connected to the lm (pp) is available and appropriate > @@ -422,7 +345,7 @@ static bool _dpu_rm_needs_split_display(const struct msm_display_topology *top) > */ > static bool _dpu_rm_check_lm_and_get_connected_blks( > struct dpu_rm *rm, > - struct dpu_rm_rsvp *rsvp, > + uint32_t enc_id, > struct dpu_rm_requirements *reqs, > struct dpu_rm_hw_blk *lm, > struct dpu_rm_hw_blk **pp, > @@ -449,7 +372,7 @@ static bool _dpu_rm_check_lm_and_get_connected_blks( > } > > /* Already reserved? */ > - if (RESERVED_BY_OTHER(lm, rsvp)) { > + if (RESERVED_BY_OTHER(lm, enc_id)) { > DPU_DEBUG("lm %d already reserved\n", lm_cfg->id); > return false; > } > @@ -467,7 +390,7 @@ static bool _dpu_rm_check_lm_and_get_connected_blks( > return false; > } > > - if (RESERVED_BY_OTHER(*pp, rsvp)) { > + if (RESERVED_BY_OTHER(*pp, enc_id)) { > DPU_DEBUG("lm %d pp %d already reserved\n", lm->id, > (*pp)->id); > return false; > @@ -476,10 +399,8 @@ static bool _dpu_rm_check_lm_and_get_connected_blks( > return true; > } > > -static int _dpu_rm_reserve_lms( > - struct dpu_rm *rm, > - struct dpu_rm_rsvp *rsvp, > - struct dpu_rm_requirements *reqs) > +static int _dpu_rm_reserve_lms(struct dpu_rm *rm, uint32_t enc_id, > + struct dpu_rm_requirements *reqs) > > { > struct dpu_rm_hw_blk *lm[MAX_BLOCKS]; > @@ -504,7 +425,7 @@ static int _dpu_rm_reserve_lms( > lm[lm_count] = iter_i.blk; > > if (!_dpu_rm_check_lm_and_get_connected_blks( > - rm, rsvp, reqs, lm[lm_count], > + rm, enc_id, reqs, lm[lm_count], > &pp[lm_count], NULL)) > continue; > > @@ -519,7 +440,7 @@ static int _dpu_rm_reserve_lms( > continue; > > if (!_dpu_rm_check_lm_and_get_connected_blks( > - rm, rsvp, reqs, iter_j.blk, > + rm, enc_id, reqs, iter_j.blk, > &pp[lm_count], iter_i.blk)) > continue; > > @@ -537,10 +458,10 @@ static int _dpu_rm_reserve_lms( > if (!lm[i]) > break; > > - lm[i]->rsvp_nxt = rsvp; > - pp[i]->rsvp_nxt = rsvp; > + lm[i]->enc_id = enc_id; > + pp[i]->enc_id = enc_id; > > - trace_dpu_rm_reserve_lms(lm[i]->id, lm[i]->type, rsvp->enc_id, > + trace_dpu_rm_reserve_lms(lm[i]->id, lm[i]->type, enc_id, > pp[i]->id); > } > > @@ -549,7 +470,7 @@ static int _dpu_rm_reserve_lms( > > static int _dpu_rm_reserve_ctls( > struct dpu_rm *rm, > - struct dpu_rm_rsvp *rsvp, > + uint32_t enc_id, > const struct msm_display_topology *top) > { > struct dpu_rm_hw_blk *ctls[MAX_BLOCKS]; > @@ -570,7 +491,7 @@ static int _dpu_rm_reserve_ctls( > unsigned long features = ctl->caps->features; > bool has_split_display; > > - if (RESERVED_BY_OTHER(iter.blk, rsvp)) > + if (RESERVED_BY_OTHER(iter.blk, enc_id)) > continue; > > has_split_display = BIT(DPU_CTL_SPLIT_DISPLAY) & features; > @@ -591,9 +512,9 @@ static int _dpu_rm_reserve_ctls( > return -ENAVAIL; > > for (i = 0; i < ARRAY_SIZE(ctls) && i < num_ctls; i++) { > - ctls[i]->rsvp_nxt = rsvp; > + ctls[i]->enc_id = enc_id; > trace_dpu_rm_reserve_ctls(ctls[i]->id, ctls[i]->type, > - rsvp->enc_id); > + enc_id); > } > > return 0; > @@ -601,7 +522,7 @@ static int _dpu_rm_reserve_ctls( > > static int _dpu_rm_reserve_intf( > struct dpu_rm *rm, > - struct dpu_rm_rsvp *rsvp, > + uint32_t enc_id, > uint32_t id, > enum dpu_hw_blk_type type) > { > @@ -614,14 +535,14 @@ static int _dpu_rm_reserve_intf( > if (iter.blk->id != id) > continue; > > - if (RESERVED_BY_OTHER(iter.blk, rsvp)) { > + if (RESERVED_BY_OTHER(iter.blk, enc_id)) { > DPU_ERROR("type %d id %d already reserved\n", type, id); > return -ENAVAIL; > } > > - iter.blk->rsvp_nxt = rsvp; > + iter.blk->enc_id = enc_id; > trace_dpu_rm_reserve_intf(iter.blk->id, iter.blk->type, > - rsvp->enc_id); > + enc_id); > break; > } > > @@ -636,7 +557,7 @@ static int _dpu_rm_reserve_intf( > > static int _dpu_rm_reserve_intf_related_hw( > struct dpu_rm *rm, > - struct dpu_rm_rsvp *rsvp, > + uint32_t enc_id, > struct dpu_encoder_hw_resources *hw_res) > { > int i, ret = 0; > @@ -646,7 +567,7 @@ static int _dpu_rm_reserve_intf_related_hw( > if (hw_res->intfs[i] == INTF_MODE_NONE) > continue; > id = i + INTF_0; > - ret = _dpu_rm_reserve_intf(rm, rsvp, id, > + ret = _dpu_rm_reserve_intf(rm, enc_id, id, > DPU_HW_BLK_INTF); > if (ret) > return ret; > @@ -655,33 +576,27 @@ static int _dpu_rm_reserve_intf_related_hw( > return ret; > } > > -static int _dpu_rm_make_next_rsvp( > +static int _dpu_rm_make_reservation( > struct dpu_rm *rm, > struct drm_encoder *enc, > struct drm_crtc_state *crtc_state, > - struct dpu_rm_rsvp *rsvp, > struct dpu_rm_requirements *reqs) > { > int ret; > > - /* Create reservation info, tag reserved blocks with it as we go */ > - rsvp->seq = ++rm->rsvp_next_seq; > - rsvp->enc_id = enc->base.id; > - list_add_tail(&rsvp->list, &rm->rsvps); > - > - ret = _dpu_rm_reserve_lms(rm, rsvp, reqs); > + ret = _dpu_rm_reserve_lms(rm, enc->base.id, reqs); > if (ret) { > DPU_ERROR("unable to find appropriate mixers\n"); > return ret; > } > > - ret = _dpu_rm_reserve_ctls(rm, rsvp, &reqs->topology); > + ret = _dpu_rm_reserve_ctls(rm, enc->base.id, &reqs->topology); > if (ret) { > DPU_ERROR("unable to find appropriate CTL\n"); > return ret; > } > > - ret = _dpu_rm_reserve_intf_related_hw(rm, rsvp, &reqs->hw_res); > + ret = _dpu_rm_reserve_intf_related_hw(rm, enc->base.id, &reqs->hw_res); > if (ret) > return ret; > > @@ -706,108 +621,31 @@ static int _dpu_rm_populate_requirements( > return 0; > } > > -static struct dpu_rm_rsvp *_dpu_rm_get_rsvp( > - struct dpu_rm *rm, > - struct drm_encoder *enc) > +static void _dpu_rm_release_reservation(struct dpu_rm *rm, uint32_t enc_id) > { > - struct dpu_rm_rsvp *i; > - > - if (!rm || !enc) { > - DPU_ERROR("invalid params\n"); > - return NULL; > - } > - > - if (list_empty(&rm->rsvps)) > - return NULL; > - > - list_for_each_entry(i, &rm->rsvps, list) > - if (i->enc_id == enc->base.id) > - return i; > - > - return NULL; > -} > - > -/** > - * _dpu_rm_release_rsvp - release resources and release a reservation > - * @rm: KMS handle > - * @rsvp: RSVP pointer to release and release resources for > - */ > -static void _dpu_rm_release_rsvp(struct dpu_rm *rm, struct dpu_rm_rsvp *rsvp) > -{ > - struct dpu_rm_rsvp *rsvp_c, *rsvp_n; > struct dpu_rm_hw_blk *blk; > enum dpu_hw_blk_type type; > > - if (!rsvp) > - return; > - > - DPU_DEBUG("rel rsvp %d enc %d\n", rsvp->seq, rsvp->enc_id); > - > - list_for_each_entry_safe(rsvp_c, rsvp_n, &rm->rsvps, list) { > - if (rsvp == rsvp_c) { > - list_del(&rsvp_c->list); > - break; > - } > - } > - > for (type = 0; type < DPU_HW_BLK_MAX; type++) { > list_for_each_entry(blk, &rm->hw_blks[type], list) { > - if (blk->rsvp == rsvp) { > - blk->rsvp = NULL; > - DPU_DEBUG("rel rsvp %d enc %d %d %d\n", > - rsvp->seq, rsvp->enc_id, > - blk->type, blk->id); > - } > - if (blk->rsvp_nxt == rsvp) { > - blk->rsvp_nxt = NULL; > - DPU_DEBUG("rel rsvp_nxt %d enc %d %d %d\n", > - rsvp->seq, rsvp->enc_id, > - blk->type, blk->id); > + if (blk->enc_id == enc_id) { > + blk->enc_id = 0; > + DPU_DEBUG("rel enc %d %d %d\n", enc_id, > + blk->type, blk->id); > } > } > } > - > - kfree(rsvp); > } > > void dpu_rm_release(struct dpu_rm *rm, struct drm_encoder *enc) > { > - struct dpu_rm_rsvp *rsvp; > - > - if (!rm || !enc) { > - DPU_ERROR("invalid params\n"); > - return; > - } > - > mutex_lock(&rm->rm_lock); > > - rsvp = _dpu_rm_get_rsvp(rm, enc); > - if (!rsvp) { > - DPU_ERROR("failed to find rsvp for enc %d\n", enc->base.id); > - goto end; > - } > + _dpu_rm_release_reservation(rm, enc->base.id); > > - _dpu_rm_release_rsvp(rm, rsvp); > -end: > mutex_unlock(&rm->rm_lock); > } > > -static void _dpu_rm_commit_rsvp(struct dpu_rm *rm, struct dpu_rm_rsvp *rsvp) > -{ > - struct dpu_rm_hw_blk *blk; > - enum dpu_hw_blk_type type; > - > - /* Swap next rsvp to be the active */ > - for (type = 0; type < DPU_HW_BLK_MAX; type++) { > - list_for_each_entry(blk, &rm->hw_blks[type], list) { > - if (blk->rsvp_nxt) { > - blk->rsvp = blk->rsvp_nxt; > - blk->rsvp_nxt = NULL; > - } > - } > - } > -} > - > int dpu_rm_reserve( > struct dpu_rm *rm, > struct drm_encoder *enc, > @@ -815,7 +653,6 @@ int dpu_rm_reserve( > struct msm_display_topology topology, > bool test_only) > { > - struct dpu_rm_rsvp *rsvp_cur, *rsvp_nxt; > struct dpu_rm_requirements reqs; > int ret; > > @@ -828,8 +665,6 @@ int dpu_rm_reserve( > > mutex_lock(&rm->rm_lock); > > - _dpu_rm_print_rsvps(rm, DPU_RM_STAGE_BEGIN); > - > ret = _dpu_rm_populate_requirements(rm, enc, crtc_state, &reqs, > topology); > if (ret) { > @@ -837,50 +672,17 @@ int dpu_rm_reserve( > goto end; > } > > - /* > - * We only support one active reservation per-hw-block. But to implement > - * transactional semantics for test-only, and for allowing failure while > - * modifying your existing reservation, over the course of this > - * function we can have two reservations: > - * Current: Existing reservation > - * Next: Proposed reservation. The proposed reservation may fail, or may > - * be discarded if in test-only mode. > - * If reservation is successful, and we're not in test-only, then we > - * replace the current with the next. > - */ > - rsvp_nxt = kzalloc(sizeof(*rsvp_nxt), GFP_KERNEL); > - if (!rsvp_nxt) { > - ret = -ENOMEM; > - goto end; > - } > - > - rsvp_cur = _dpu_rm_get_rsvp(rm, enc); > - > - /* Check the proposed reservation, store it in hw's "next" field */ > - ret = _dpu_rm_make_next_rsvp(rm, enc, crtc_state, rsvp_nxt, &reqs); > - > - _dpu_rm_print_rsvps(rm, DPU_RM_STAGE_AFTER_RSVPNEXT); > - > + ret = _dpu_rm_make_reservation(rm, enc, crtc_state, &reqs); > if (ret) { > DPU_ERROR("failed to reserve hw resources: %d\n", ret); > - _dpu_rm_release_rsvp(rm, rsvp_nxt); > + _dpu_rm_release_reservation(rm, enc->base.id); > } else if (test_only) { > - /* > - * Normally, if test_only, test the reservation and then undo > - * However, if the user requests LOCK, then keep the reservation > - * made during the atomic_check phase. > - */ > - DPU_DEBUG("test_only: discard test rsvp[s%de%d]\n", > - rsvp_nxt->seq, rsvp_nxt->enc_id); > - _dpu_rm_release_rsvp(rm, rsvp_nxt); > - } else { > - _dpu_rm_release_rsvp(rm, rsvp_cur); > - > - _dpu_rm_commit_rsvp(rm, rsvp_nxt); > + /* test_only: test the reservation and then undo */ > + DPU_DEBUG("test_only: discard test [enc: %d]\n", > + enc->base.id); > + _dpu_rm_release_reservation(rm, enc->base.id); > } > > - _dpu_rm_print_rsvps(rm, DPU_RM_STAGE_FINAL); > - > end: > mutex_unlock(&rm->rm_lock); > > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h > index b8273bd..0dd3c21 100644 > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h > @@ -23,21 +23,17 @@ > /** > * struct dpu_rm - DPU dynamic hardware resource manager > * @dev: device handle for event logging purposes > - * @rsvps: list of hardware reservations by each crtc->encoder->connector > * @hw_blks: array of lists of hardware resources present in the system, one > * list per type of hardware block > * @hw_mdp: hardware object for mdp_top > * @lm_max_width: cached layer mixer maximum width > - * @rsvp_next_seq: sequence number for next reservation for debugging purposes > * @rm_lock: resource manager mutex > */ > struct dpu_rm { > struct drm_device *dev; > - struct list_head rsvps; > struct list_head hw_blks[DPU_HW_BLK_MAX]; > struct dpu_hw_mdp *hw_mdp; > uint32_t lm_max_width; > - uint32_t rsvp_next_seq; > struct mutex rm_lock; > }; > > -- > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, > a Linux Foundation Collaborative Project >
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c index bdb1177..36a929b 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c @@ -21,8 +21,8 @@ #include "dpu_encoder.h" #include "dpu_trace.h" -#define RESERVED_BY_OTHER(h, r) \ - ((h)->rsvp && ((h)->rsvp->enc_id != (r)->enc_id)) +#define RESERVED_BY_OTHER(h, r) \ + ((h)->enc_id && (h)->enc_id != r) /** * struct dpu_rm_requirements - Reservation requirements parameter bundle @@ -34,85 +34,23 @@ struct dpu_rm_requirements { struct dpu_encoder_hw_resources hw_res; }; -/** - * struct dpu_rm_rsvp - Use Case Reservation tagging structure - * Used to tag HW blocks as reserved by a CRTC->Encoder->Connector chain - * By using as a tag, rather than lists of pointers to HW blocks used - * we can avoid some list management since we don't know how many blocks - * of each type a given use case may require. - * @list: List head for list of all reservations - * @seq: Global RSVP sequence number for debugging, especially for - * differentiating differenct allocations for same encoder. - * @enc_id: Reservations are tracked by Encoder DRM object ID. - * CRTCs may be connected to multiple Encoders. - * An encoder or connector id identifies the display path. - */ -struct dpu_rm_rsvp { - struct list_head list; - uint32_t seq; - uint32_t enc_id; -}; /** * struct dpu_rm_hw_blk - hardware block tracking list member * @list: List head for list of all hardware blocks tracking items - * @rsvp: Pointer to use case reservation if reserved by a client - * @rsvp_nxt: Temporary pointer used during reservation to the incoming - * request. Will be swapped into rsvp if proposal is accepted * @type: Type of hardware block this structure tracks * @id: Hardware ID number, within it's own space, ie. LM_X - * @catalog: Pointer to the hardware catalog entry for this block + * @enc_id: Encoder id to which this blk is binded * @hw: Pointer to the hardware register access object for this block */ struct dpu_rm_hw_blk { struct list_head list; - struct dpu_rm_rsvp *rsvp; - struct dpu_rm_rsvp *rsvp_nxt; enum dpu_hw_blk_type type; uint32_t id; + uint32_t enc_id; struct dpu_hw_blk *hw; }; -/** - * dpu_rm_dbg_rsvp_stage - enum of steps in making reservation for event logging - */ -enum dpu_rm_dbg_rsvp_stage { - DPU_RM_STAGE_BEGIN, - DPU_RM_STAGE_AFTER_CLEAR, - DPU_RM_STAGE_AFTER_RSVPNEXT, - DPU_RM_STAGE_FINAL -}; - -static void _dpu_rm_print_rsvps( - struct dpu_rm *rm, - enum dpu_rm_dbg_rsvp_stage stage) -{ - struct dpu_rm_rsvp *rsvp; - struct dpu_rm_hw_blk *blk; - enum dpu_hw_blk_type type; - - DPU_DEBUG("%d\n", stage); - - list_for_each_entry(rsvp, &rm->rsvps, list) { - DRM_DEBUG_KMS("%d rsvp[s%ue%u]\n", stage, rsvp->seq, - rsvp->enc_id); - } - - for (type = 0; type < DPU_HW_BLK_MAX; type++) { - list_for_each_entry(blk, &rm->hw_blks[type], list) { - if (!blk->rsvp && !blk->rsvp_nxt) - continue; - - DRM_DEBUG_KMS("%d rsvp[s%ue%u->s%ue%u] %d %d\n", stage, - (blk->rsvp) ? blk->rsvp->seq : 0, - (blk->rsvp) ? blk->rsvp->enc_id : 0, - (blk->rsvp_nxt) ? blk->rsvp_nxt->seq : 0, - (blk->rsvp_nxt) ? blk->rsvp_nxt->enc_id : 0, - blk->type, blk->id); - } - } -} - struct dpu_hw_mdp *dpu_rm_get_mdp(struct dpu_rm *rm) { return rm->hw_mdp; @@ -148,15 +86,13 @@ static bool _dpu_rm_get_hw_locked(struct dpu_rm *rm, struct dpu_rm_hw_iter *i) i->blk = list_prepare_entry(i->blk, blk_list, list); list_for_each_entry_continue(i->blk, blk_list, list) { - struct dpu_rm_rsvp *rsvp = i->blk->rsvp; - if (i->blk->type != i->type) { DPU_ERROR("found incorrect block type %d on %d list\n", i->blk->type, i->type); return false; } - if ((i->enc_id == 0) || (rsvp && rsvp->enc_id == i->enc_id)) { + if (i->enc_id == i->blk->enc_id) { i->hw = i->blk->hw; DPU_DEBUG("found type %d id %d for enc %d\n", i->type, i->blk->id, i->enc_id); @@ -208,22 +144,9 @@ static void _dpu_rm_hw_destroy(enum dpu_hw_blk_type type, void *hw) int dpu_rm_destroy(struct dpu_rm *rm) { - - struct dpu_rm_rsvp *rsvp_cur, *rsvp_nxt; struct dpu_rm_hw_blk *hw_cur, *hw_nxt; enum dpu_hw_blk_type type; - if (!rm) { - DPU_ERROR("invalid rm\n"); - return -EINVAL; - } - - list_for_each_entry_safe(rsvp_cur, rsvp_nxt, &rm->rsvps, list) { - list_del(&rsvp_cur->list); - kfree(rsvp_cur); - } - - for (type = 0; type < DPU_HW_BLK_MAX; type++) { list_for_each_entry_safe(hw_cur, hw_nxt, &rm->hw_blks[type], list) { @@ -293,6 +216,7 @@ static int _dpu_rm_hw_blk_create( blk->type = type; blk->id = id; blk->hw = hw; + blk->enc_id = 0; list_add_tail(&blk->list, &rm->hw_blks[type]); return 0; @@ -316,7 +240,6 @@ int dpu_rm_init(struct dpu_rm *rm, mutex_init(&rm->rm_lock); - INIT_LIST_HEAD(&rm->rsvps); for (type = 0; type < DPU_HW_BLK_MAX; type++) INIT_LIST_HEAD(&rm->hw_blks[type]); @@ -410,7 +333,7 @@ static bool _dpu_rm_needs_split_display(const struct msm_display_topology *top) * proposed use case requirements, incl. hardwired dependent blocks like * pingpong * @rm: dpu resource manager handle - * @rsvp: reservation currently being created + * @enc_id: encoder id requesting for allocation * @reqs: proposed use case requirements * @lm: proposed layer mixer, function checks if lm, and all other hardwired * blocks connected to the lm (pp) is available and appropriate @@ -422,7 +345,7 @@ static bool _dpu_rm_needs_split_display(const struct msm_display_topology *top) */ static bool _dpu_rm_check_lm_and_get_connected_blks( struct dpu_rm *rm, - struct dpu_rm_rsvp *rsvp, + uint32_t enc_id, struct dpu_rm_requirements *reqs, struct dpu_rm_hw_blk *lm, struct dpu_rm_hw_blk **pp, @@ -449,7 +372,7 @@ static bool _dpu_rm_check_lm_and_get_connected_blks( } /* Already reserved? */ - if (RESERVED_BY_OTHER(lm, rsvp)) { + if (RESERVED_BY_OTHER(lm, enc_id)) { DPU_DEBUG("lm %d already reserved\n", lm_cfg->id); return false; } @@ -467,7 +390,7 @@ static bool _dpu_rm_check_lm_and_get_connected_blks( return false; } - if (RESERVED_BY_OTHER(*pp, rsvp)) { + if (RESERVED_BY_OTHER(*pp, enc_id)) { DPU_DEBUG("lm %d pp %d already reserved\n", lm->id, (*pp)->id); return false; @@ -476,10 +399,8 @@ static bool _dpu_rm_check_lm_and_get_connected_blks( return true; } -static int _dpu_rm_reserve_lms( - struct dpu_rm *rm, - struct dpu_rm_rsvp *rsvp, - struct dpu_rm_requirements *reqs) +static int _dpu_rm_reserve_lms(struct dpu_rm *rm, uint32_t enc_id, + struct dpu_rm_requirements *reqs) { struct dpu_rm_hw_blk *lm[MAX_BLOCKS]; @@ -504,7 +425,7 @@ static int _dpu_rm_reserve_lms( lm[lm_count] = iter_i.blk; if (!_dpu_rm_check_lm_and_get_connected_blks( - rm, rsvp, reqs, lm[lm_count], + rm, enc_id, reqs, lm[lm_count], &pp[lm_count], NULL)) continue; @@ -519,7 +440,7 @@ static int _dpu_rm_reserve_lms( continue; if (!_dpu_rm_check_lm_and_get_connected_blks( - rm, rsvp, reqs, iter_j.blk, + rm, enc_id, reqs, iter_j.blk, &pp[lm_count], iter_i.blk)) continue; @@ -537,10 +458,10 @@ static int _dpu_rm_reserve_lms( if (!lm[i]) break; - lm[i]->rsvp_nxt = rsvp; - pp[i]->rsvp_nxt = rsvp; + lm[i]->enc_id = enc_id; + pp[i]->enc_id = enc_id; - trace_dpu_rm_reserve_lms(lm[i]->id, lm[i]->type, rsvp->enc_id, + trace_dpu_rm_reserve_lms(lm[i]->id, lm[i]->type, enc_id, pp[i]->id); } @@ -549,7 +470,7 @@ static int _dpu_rm_reserve_lms( static int _dpu_rm_reserve_ctls( struct dpu_rm *rm, - struct dpu_rm_rsvp *rsvp, + uint32_t enc_id, const struct msm_display_topology *top) { struct dpu_rm_hw_blk *ctls[MAX_BLOCKS]; @@ -570,7 +491,7 @@ static int _dpu_rm_reserve_ctls( unsigned long features = ctl->caps->features; bool has_split_display; - if (RESERVED_BY_OTHER(iter.blk, rsvp)) + if (RESERVED_BY_OTHER(iter.blk, enc_id)) continue; has_split_display = BIT(DPU_CTL_SPLIT_DISPLAY) & features; @@ -591,9 +512,9 @@ static int _dpu_rm_reserve_ctls( return -ENAVAIL; for (i = 0; i < ARRAY_SIZE(ctls) && i < num_ctls; i++) { - ctls[i]->rsvp_nxt = rsvp; + ctls[i]->enc_id = enc_id; trace_dpu_rm_reserve_ctls(ctls[i]->id, ctls[i]->type, - rsvp->enc_id); + enc_id); } return 0; @@ -601,7 +522,7 @@ static int _dpu_rm_reserve_ctls( static int _dpu_rm_reserve_intf( struct dpu_rm *rm, - struct dpu_rm_rsvp *rsvp, + uint32_t enc_id, uint32_t id, enum dpu_hw_blk_type type) { @@ -614,14 +535,14 @@ static int _dpu_rm_reserve_intf( if (iter.blk->id != id) continue; - if (RESERVED_BY_OTHER(iter.blk, rsvp)) { + if (RESERVED_BY_OTHER(iter.blk, enc_id)) { DPU_ERROR("type %d id %d already reserved\n", type, id); return -ENAVAIL; } - iter.blk->rsvp_nxt = rsvp; + iter.blk->enc_id = enc_id; trace_dpu_rm_reserve_intf(iter.blk->id, iter.blk->type, - rsvp->enc_id); + enc_id); break; } @@ -636,7 +557,7 @@ static int _dpu_rm_reserve_intf( static int _dpu_rm_reserve_intf_related_hw( struct dpu_rm *rm, - struct dpu_rm_rsvp *rsvp, + uint32_t enc_id, struct dpu_encoder_hw_resources *hw_res) { int i, ret = 0; @@ -646,7 +567,7 @@ static int _dpu_rm_reserve_intf_related_hw( if (hw_res->intfs[i] == INTF_MODE_NONE) continue; id = i + INTF_0; - ret = _dpu_rm_reserve_intf(rm, rsvp, id, + ret = _dpu_rm_reserve_intf(rm, enc_id, id, DPU_HW_BLK_INTF); if (ret) return ret; @@ -655,33 +576,27 @@ static int _dpu_rm_reserve_intf_related_hw( return ret; } -static int _dpu_rm_make_next_rsvp( +static int _dpu_rm_make_reservation( struct dpu_rm *rm, struct drm_encoder *enc, struct drm_crtc_state *crtc_state, - struct dpu_rm_rsvp *rsvp, struct dpu_rm_requirements *reqs) { int ret; - /* Create reservation info, tag reserved blocks with it as we go */ - rsvp->seq = ++rm->rsvp_next_seq; - rsvp->enc_id = enc->base.id; - list_add_tail(&rsvp->list, &rm->rsvps); - - ret = _dpu_rm_reserve_lms(rm, rsvp, reqs); + ret = _dpu_rm_reserve_lms(rm, enc->base.id, reqs); if (ret) { DPU_ERROR("unable to find appropriate mixers\n"); return ret; } - ret = _dpu_rm_reserve_ctls(rm, rsvp, &reqs->topology); + ret = _dpu_rm_reserve_ctls(rm, enc->base.id, &reqs->topology); if (ret) { DPU_ERROR("unable to find appropriate CTL\n"); return ret; } - ret = _dpu_rm_reserve_intf_related_hw(rm, rsvp, &reqs->hw_res); + ret = _dpu_rm_reserve_intf_related_hw(rm, enc->base.id, &reqs->hw_res); if (ret) return ret; @@ -706,108 +621,31 @@ static int _dpu_rm_populate_requirements( return 0; } -static struct dpu_rm_rsvp *_dpu_rm_get_rsvp( - struct dpu_rm *rm, - struct drm_encoder *enc) +static void _dpu_rm_release_reservation(struct dpu_rm *rm, uint32_t enc_id) { - struct dpu_rm_rsvp *i; - - if (!rm || !enc) { - DPU_ERROR("invalid params\n"); - return NULL; - } - - if (list_empty(&rm->rsvps)) - return NULL; - - list_for_each_entry(i, &rm->rsvps, list) - if (i->enc_id == enc->base.id) - return i; - - return NULL; -} - -/** - * _dpu_rm_release_rsvp - release resources and release a reservation - * @rm: KMS handle - * @rsvp: RSVP pointer to release and release resources for - */ -static void _dpu_rm_release_rsvp(struct dpu_rm *rm, struct dpu_rm_rsvp *rsvp) -{ - struct dpu_rm_rsvp *rsvp_c, *rsvp_n; struct dpu_rm_hw_blk *blk; enum dpu_hw_blk_type type; - if (!rsvp) - return; - - DPU_DEBUG("rel rsvp %d enc %d\n", rsvp->seq, rsvp->enc_id); - - list_for_each_entry_safe(rsvp_c, rsvp_n, &rm->rsvps, list) { - if (rsvp == rsvp_c) { - list_del(&rsvp_c->list); - break; - } - } - for (type = 0; type < DPU_HW_BLK_MAX; type++) { list_for_each_entry(blk, &rm->hw_blks[type], list) { - if (blk->rsvp == rsvp) { - blk->rsvp = NULL; - DPU_DEBUG("rel rsvp %d enc %d %d %d\n", - rsvp->seq, rsvp->enc_id, - blk->type, blk->id); - } - if (blk->rsvp_nxt == rsvp) { - blk->rsvp_nxt = NULL; - DPU_DEBUG("rel rsvp_nxt %d enc %d %d %d\n", - rsvp->seq, rsvp->enc_id, - blk->type, blk->id); + if (blk->enc_id == enc_id) { + blk->enc_id = 0; + DPU_DEBUG("rel enc %d %d %d\n", enc_id, + blk->type, blk->id); } } } - - kfree(rsvp); } void dpu_rm_release(struct dpu_rm *rm, struct drm_encoder *enc) { - struct dpu_rm_rsvp *rsvp; - - if (!rm || !enc) { - DPU_ERROR("invalid params\n"); - return; - } - mutex_lock(&rm->rm_lock); - rsvp = _dpu_rm_get_rsvp(rm, enc); - if (!rsvp) { - DPU_ERROR("failed to find rsvp for enc %d\n", enc->base.id); - goto end; - } + _dpu_rm_release_reservation(rm, enc->base.id); - _dpu_rm_release_rsvp(rm, rsvp); -end: mutex_unlock(&rm->rm_lock); } -static void _dpu_rm_commit_rsvp(struct dpu_rm *rm, struct dpu_rm_rsvp *rsvp) -{ - struct dpu_rm_hw_blk *blk; - enum dpu_hw_blk_type type; - - /* Swap next rsvp to be the active */ - for (type = 0; type < DPU_HW_BLK_MAX; type++) { - list_for_each_entry(blk, &rm->hw_blks[type], list) { - if (blk->rsvp_nxt) { - blk->rsvp = blk->rsvp_nxt; - blk->rsvp_nxt = NULL; - } - } - } -} - int dpu_rm_reserve( struct dpu_rm *rm, struct drm_encoder *enc, @@ -815,7 +653,6 @@ int dpu_rm_reserve( struct msm_display_topology topology, bool test_only) { - struct dpu_rm_rsvp *rsvp_cur, *rsvp_nxt; struct dpu_rm_requirements reqs; int ret; @@ -828,8 +665,6 @@ int dpu_rm_reserve( mutex_lock(&rm->rm_lock); - _dpu_rm_print_rsvps(rm, DPU_RM_STAGE_BEGIN); - ret = _dpu_rm_populate_requirements(rm, enc, crtc_state, &reqs, topology); if (ret) { @@ -837,50 +672,17 @@ int dpu_rm_reserve( goto end; } - /* - * We only support one active reservation per-hw-block. But to implement - * transactional semantics for test-only, and for allowing failure while - * modifying your existing reservation, over the course of this - * function we can have two reservations: - * Current: Existing reservation - * Next: Proposed reservation. The proposed reservation may fail, or may - * be discarded if in test-only mode. - * If reservation is successful, and we're not in test-only, then we - * replace the current with the next. - */ - rsvp_nxt = kzalloc(sizeof(*rsvp_nxt), GFP_KERNEL); - if (!rsvp_nxt) { - ret = -ENOMEM; - goto end; - } - - rsvp_cur = _dpu_rm_get_rsvp(rm, enc); - - /* Check the proposed reservation, store it in hw's "next" field */ - ret = _dpu_rm_make_next_rsvp(rm, enc, crtc_state, rsvp_nxt, &reqs); - - _dpu_rm_print_rsvps(rm, DPU_RM_STAGE_AFTER_RSVPNEXT); - + ret = _dpu_rm_make_reservation(rm, enc, crtc_state, &reqs); if (ret) { DPU_ERROR("failed to reserve hw resources: %d\n", ret); - _dpu_rm_release_rsvp(rm, rsvp_nxt); + _dpu_rm_release_reservation(rm, enc->base.id); } else if (test_only) { - /* - * Normally, if test_only, test the reservation and then undo - * However, if the user requests LOCK, then keep the reservation - * made during the atomic_check phase. - */ - DPU_DEBUG("test_only: discard test rsvp[s%de%d]\n", - rsvp_nxt->seq, rsvp_nxt->enc_id); - _dpu_rm_release_rsvp(rm, rsvp_nxt); - } else { - _dpu_rm_release_rsvp(rm, rsvp_cur); - - _dpu_rm_commit_rsvp(rm, rsvp_nxt); + /* test_only: test the reservation and then undo */ + DPU_DEBUG("test_only: discard test [enc: %d]\n", + enc->base.id); + _dpu_rm_release_reservation(rm, enc->base.id); } - _dpu_rm_print_rsvps(rm, DPU_RM_STAGE_FINAL); - end: mutex_unlock(&rm->rm_lock); diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h index b8273bd..0dd3c21 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h @@ -23,21 +23,17 @@ /** * struct dpu_rm - DPU dynamic hardware resource manager * @dev: device handle for event logging purposes - * @rsvps: list of hardware reservations by each crtc->encoder->connector * @hw_blks: array of lists of hardware resources present in the system, one * list per type of hardware block * @hw_mdp: hardware object for mdp_top * @lm_max_width: cached layer mixer maximum width - * @rsvp_next_seq: sequence number for next reservation for debugging purposes * @rm_lock: resource manager mutex */ struct dpu_rm { struct drm_device *dev; - struct list_head rsvps; struct list_head hw_blks[DPU_HW_BLK_MAX]; struct dpu_hw_mdp *hw_mdp; uint32_t lm_max_width; - uint32_t rsvp_next_seq; struct mutex rm_lock; };
RM was equipped with reservation tracking structure RSVP to cache HW reservation of displays for certain clients where atomic_checks (atomic commit with TEST_ONLY) for all the displays are called before their respective atomic_commits. Since DPU doesn't support the sequence anymore, clean up the support from RM. Replace rsvp with the corresponding encoder id to tag the HW blocks reserved. Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org> --- drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c | 284 +++++---------------------------- drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h | 4 - 2 files changed, 43 insertions(+), 245 deletions(-)