On Fri, Feb 10, 2017 at 03:30:10PM +0200, Joonas Lahtinen wrote:
> Started adding proper teardown to guc_client_alloc, ended up removing
> quite a few dead ends where errors communicating with the GuC were
> silently ignored. There also seemed to be quite a few erronous
> teardown actions performed in case of an error (ordering wrong).
>
> Signed-off-by: Joonas Lahtinen <[email protected]>
> Cc: Michal Wajdeczko <[email protected]>
> Cc: Arkadiusz Hiler <[email protected]>
> Cc: Oscar Mateo <[email protected]>
> Cc: Tvrtko Ursulin <[email protected]>
> Cc: Chris Wilson <[email protected]>
> ---
> drivers/gpu/drm/i915/i915_debugfs.c | 4 +-
> drivers/gpu/drm/i915/i915_guc_submission.c | 384
> +++++++++++++++++------------
> drivers/gpu/drm/i915/intel_guc_fwif.h | 4 +-
> drivers/gpu/drm/i915/intel_uc.h | 9 +-
> 4 files changed, 230 insertions(+), 171 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
> b/drivers/gpu/drm/i915/i915_debugfs.c
> index 1ccc297..86c6f831 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -2480,7 +2480,7 @@ static void i915_guc_client_info(struct seq_file *m,
>
> seq_printf(m, "\tPriority %d, GuC ctx index: %u, PD offset 0x%x\n",
> client->priority, client->ctx_index, client->proc_desc_offset);
> - seq_printf(m, "\tDoorbell id %d, offset: 0x%x, cookie 0x%x\n",
> + seq_printf(m, "\tDoorbell id %d, offset: 0x%lx, cookie 0x%x\n",
> client->doorbell_id, client->doorbell_offset,
> client->doorbell_cookie);
> seq_printf(m, "\tWQ size %d, offset: 0x%x, tail %d\n",
> client->wq_size, client->wq_offset, client->wq_tail);
> @@ -2515,7 +2515,7 @@ static int i915_guc_info(struct seq_file *m, void *data)
> }
>
> seq_printf(m, "Doorbell map:\n");
> - seq_printf(m, "\t%*pb\n", GUC_MAX_DOORBELLS, guc->doorbell_bitmap);
> + seq_printf(m, "\t%*pb\n", GUC_NUM_DOORBELLS, guc->doorbell_bitmap);
> seq_printf(m, "Doorbell next cacheline: 0x%x\n\n", guc->db_cacheline);
>
> seq_printf(m, "GuC total action count: %llu\n", guc->action_count);
> diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c
> b/drivers/gpu/drm/i915/i915_guc_submission.c
> index 8ced9e2..d0c7004 100644
> --- a/drivers/gpu/drm/i915/i915_guc_submission.c
> +++ b/drivers/gpu/drm/i915/i915_guc_submission.c
> @@ -62,30 +62,79 @@
> *
> */
>
> +static inline bool is_high_priority(struct i915_guc_client* client)
> +{
> + return client->priority <= GUC_CTX_PRIORITY_HIGH;
> +}
> +
> +static bool __test_doorbell(struct i915_guc_client *client)
explicit inline ? or you want to let gcc decide ?
> +{
> + return test_bit(client->doorbell_id, client->guc->doorbell_bitmap);
> +}
> +
> +static void __release_doorbell(struct i915_guc_client *client)
> +{
> + GEM_BUG_ON(client->doorbell_id == GUC_DOORBELL_INVALID);
> +
> + __clear_bit(client->doorbell_id, client->guc->doorbell_bitmap);
> +}
> +
> +static int __reserve_doorbell(struct i915_guc_client *client)
> +{
> + unsigned long offset;
> + unsigned long end;
> + u16 id;
> +
> + GEM_BUG_ON(client->doorbell_id != GUC_DOORBELL_INVALID);
> +
> + /*
> + * The bitmap tracks which doorbell registers are currently in use.
> + * It is split into two halves; the first half is used for normal
> + * priority contexts, the second half for high-priority ones.
> + * Note that logically higher priorities are numerically less than
> + * normal ones, so the test below means "is it high-priority?"
> + */
> +
> + offset = 0;
> + if (is_high_priority(client))
> + offset = GUC_NUM_DOORBELLS/2;
> +
> + end = GUC_NUM_DOORBELLS - offset;
> +
> + id = find_next_zero_bit(client->guc->doorbell_bitmap, offset, end);
> + if (id == end)
> + return -ENOSPC;
> +
> + __set_bit(id, client->guc->doorbell_bitmap);
> + client->doorbell_id = id;
> + DRM_DEBUG_DRIVER("client %u (high prio=%s) reserved doorbell %d: \n",
> + client->ctx_index, yesno(is_high_priority(client)),
> + id);
> + return 0;
> +}
> +
> /*
> * Tell the GuC to allocate or deallocate a specific doorbell
> */
>
> -static int guc_allocate_doorbell(struct intel_guc *guc,
> - struct i915_guc_client *client)
> +static int __create_doorbell_hw(struct i915_guc_client *client)
I would rather prefer to only change signature of this function into
static int guc_allocate_doorbell(struct intel_guc *guc, u32 index)
as a clean wrap around GUC_ACTION_ALLOCATE_DOORBELL. This way we also preserve
consistency between function name and the guc action name used inside.
Based on the above we can still add
static int __create_doorbell_hw(struct i915_guc_client *client)
{
return guc_allocate_doorbell(client->guc, client->ctx_index);
}
Note that location of the ctx_index member may change in the future, and this
approach will minimize impact of these future changes.
> {
> u32 action[] = {
> INTEL_GUC_ACTION_ALLOCATE_DOORBELL,
> client->ctx_index
> };
>
> - return intel_guc_send(guc, action, ARRAY_SIZE(action));
> + return intel_guc_send(client->guc, action, ARRAY_SIZE(action));
> }
>
> -static int guc_release_doorbell(struct intel_guc *guc,
> - struct i915_guc_client *client)
> +static int __destroy_doorbell_hw(struct i915_guc_client *client)
Same comment here.
> {
> u32 action[] = {
> INTEL_GUC_ACTION_DEALLOCATE_DOORBELL,
> client->ctx_index
> };
>
> - return intel_guc_send(guc, action, ARRAY_SIZE(action));
> + return intel_guc_send(client->guc, action, ARRAY_SIZE(action));
> }
>
> /*
> @@ -95,104 +144,114 @@ static int guc_release_doorbell(struct intel_guc *guc,
> * client object which contains the page being used for the doorbell
> */
>
> -static int guc_update_doorbell_id(struct intel_guc *guc,
> - struct i915_guc_client *client,
> - u16 new_id)
> +static int __update_doorbell(struct i915_guc_client *client, u16 new_id)
> {
> - struct sg_table *sg = guc->ctx_pool_vma->pages;
> - void *doorbell_bitmap = guc->doorbell_bitmap;
> - struct guc_doorbell_info *doorbell;
> + struct sg_table *sg = client->guc->ctx_pool_vma->pages;
> struct guc_context_desc desc;
> size_t len;
>
> - doorbell = client->vaddr + client->doorbell_offset;
> -
> - if (client->doorbell_id != GUC_INVALID_DOORBELL_ID &&
> - test_bit(client->doorbell_id, doorbell_bitmap)) {
> - /* Deactivate the old doorbell */
> - doorbell->db_status = GUC_DOORBELL_DISABLED;
> - (void)guc_release_doorbell(guc, client);
> - __clear_bit(client->doorbell_id, doorbell_bitmap);
> - }
> -
> /* Update the GuC's idea of the doorbell ID */
> len = sg_pcopy_to_buffer(sg->sgl, sg->nents, &desc, sizeof(desc),
> - sizeof(desc) * client->ctx_index);
> + sizeof(desc) * client->ctx_index);
> if (len != sizeof(desc))
> return -EFAULT;
> +
> desc.db_id = new_id;
> len = sg_pcopy_from_buffer(sg->sgl, sg->nents, &desc, sizeof(desc),
> - sizeof(desc) * client->ctx_index);
> + sizeof(desc) * client->ctx_index);
> if (len != sizeof(desc))
> return -EFAULT;
>
> - client->doorbell_id = new_id;
> - if (new_id == GUC_INVALID_DOORBELL_ID)
> - return 0;
> + return 0;
> +}
> +
> +static bool has_doorbell(struct i915_guc_client *client)
> +{
> + if (client->doorbell_id == GUC_DOORBELL_INVALID)
> + return false;
> +
> + return __test_doorbell(client);
> +}
Can we keep related inline helpers together ?
>
> - /* Activate the new doorbell */
> - __set_bit(new_id, doorbell_bitmap);
> +static struct guc_doorbell_info *__get_doorbell(struct i915_guc_client
> *client)
> +{
> + return client->vaddr + client->doorbell_offset;
> +}
> +
> +static int __create_doorbell(struct i915_guc_client *client)
> +{
> + struct guc_doorbell_info *doorbell;
> + int err;
> +
> + doorbell = __get_doorbell(client);
> doorbell->db_status = GUC_DOORBELL_ENABLED;
> doorbell->cookie = client->doorbell_cookie;
> - return guc_allocate_doorbell(guc, client);
> +
> + err = __create_doorbell_hw(client);
> + if (err) {
> + doorbell->db_status = GUC_DOORBELL_DISABLED;
> + doorbell->cookie = 0;
> + __release_doorbell(client);
> + }
> + return err;
> }
>
> -static void guc_disable_doorbell(struct intel_guc *guc,
> - struct i915_guc_client *client)
> +/*
> +static int create_doorbell(struct i915_guc_client *client)
> {
> - (void)guc_update_doorbell_id(guc, client, GUC_INVALID_DOORBELL_ID);
> + int err;
>
> - /* XXX: wait for any interrupts */
> - /* XXX: wait for workqueue to drain */
> + GEM_BUG_ON(has_doorbell(client));
> +
> + err = __reserve_doorbell(client);
> + if (err)
> + return err;
> +
> + return __create_doorbell(client);
> }
> +*/
Wrong commit ?
>
> -static uint16_t
> -select_doorbell_register(struct intel_guc *guc, uint32_t priority)
> +static int __destroy_doorbell(struct i915_guc_client *client)
> {
> - /*
> - * The bitmap tracks which doorbell registers are currently in use.
> - * It is split into two halves; the first half is used for normal
> - * priority contexts, the second half for high-priority ones.
> - * Note that logically higher priorities are numerically less than
> - * normal ones, so the test below means "is it high-priority?"
> - */
> - const bool hi_pri = (priority <= GUC_CTX_PRIORITY_HIGH);
> - const uint16_t half = GUC_MAX_DOORBELLS / 2;
> - const uint16_t start = hi_pri ? half : 0;
> - const uint16_t end = start + half;
> - uint16_t id;
> -
> - id = find_next_zero_bit(guc->doorbell_bitmap, end, start);
> - if (id == end)
> - id = GUC_INVALID_DOORBELL_ID;
> + struct guc_doorbell_info *doorbell;
>
> - DRM_DEBUG_DRIVER("assigned %s priority doorbell id 0x%x\n",
> - hi_pri ? "high" : "normal", id);
> + doorbell = __get_doorbell(client);
> + doorbell->db_status = GUC_DOORBELL_DISABLED;
> + doorbell->cookie = 0;
>
> - return id;
> + return __destroy_doorbell_hw(client);
> }
>
> -/*
> - * Select, assign and relase doorbell cachelines
> - *
> - * These functions track which doorbell cachelines are in use.
> - * The data they manipulate is protected by the intel_guc_send lock.
> - */
> +static int destroy_doorbell(struct i915_guc_client *client)
> +{
> + int err;
> +
> + GEM_BUG_ON(!has_doorbell(client));
>
> -static uint32_t select_doorbell_cacheline(struct intel_guc *guc)
> + /* XXX: wait for any interrupts */
> + /* XXX: wait for workqueue to drain */
> +
> + err = __destroy_doorbell(client);
> + if (err)
> + return err;
> +
> + __release_doorbell(client);
> +
> + return 0;
> +}
> +
> +static unsigned long __reserve_cacheline(struct intel_guc* guc)
> {
> - const uint32_t cacheline_size = cache_line_size();
> - uint32_t offset;
> + unsigned long offset;
>
> /* Doorbell uses a single cache line within a page */
> offset = offset_in_page(guc->db_cacheline);
>
> /* Moving to next cache line to reduce contention */
> - guc->db_cacheline += cacheline_size;
> -
> - DRM_DEBUG_DRIVER("selected doorbell cacheline 0x%x, next 0x%x, linesize
> %u\n",
> - offset, guc->db_cacheline, cacheline_size);
> + guc->db_cacheline += cache_line_size();
>
> + DRM_DEBUG_DRIVER("reserved cacheline 0x%lx, next 0x%x, linesize %u\n",
> + offset, guc->db_cacheline, cache_line_size());
> return offset;
> }
>
> @@ -584,93 +643,81 @@ struct i915_vma *intel_guc_allocate_vma(struct
> intel_guc *guc, u32 size)
> return vma;
> }
>
> -static void
> -guc_client_free(struct drm_i915_private *dev_priv,
> - struct i915_guc_client *client)
> +static void guc_client_free(struct i915_guc_client *client)
> {
> - struct intel_guc *guc = &dev_priv->guc;
We use guc few times, so maybe we can leave it as
guc = client->guc;
> -
> - if (!client)
> - return;
> -
> /*
> * XXX: wait for any outstanding submissions before freeing memory.
> * Be sure to drop any locks
> */
> -
> - if (client->vaddr) {
> - /*
> - * If we got as far as setting up a doorbell, make sure we
> - * shut it down before unmapping & deallocating the memory.
> - */
> - guc_disable_doorbell(guc, client);
> -
> - i915_gem_object_unpin_map(client->vma->obj);
> - }
> -
> + WARN_ON(destroy_doorbell(client));
> + guc_ctx_desc_fini(client->guc, client);
> + i915_gem_object_unpin_map(client->vma->obj);
> i915_vma_unpin_and_release(&client->vma);
> -
> - if (client->ctx_index != GUC_INVALID_CTX_ID) {
> - guc_ctx_desc_fini(guc, client);
> - ida_simple_remove(&guc->ctx_ids, client->ctx_index);
> - }
> -
> + ida_simple_remove(&client->guc->ctx_ids, client->ctx_index);
What about adding small helper function and use it here instead of
directly touching guc internal member:
guc_release_client_index(guc, client->ctx_index);
> kfree(client);
> }
>
> /* Check that a doorbell register is in the expected state */
> -static bool guc_doorbell_check(struct intel_guc *guc, uint16_t db_id)
> +static bool doorbell_ok(struct intel_guc *guc, u8 db_id)
> {
> struct drm_i915_private *dev_priv = guc_to_i915(guc);
> - i915_reg_t drbreg = GEN8_DRBREGL(db_id);
> - uint32_t value = I915_READ(drbreg);
> - bool enabled = (value & GUC_DOORBELL_ENABLED) != 0;
> - bool expected = test_bit(db_id, guc->doorbell_bitmap);
>
> - if (enabled == expected)
> + u32 drbregl = I915_READ(GEN8_DRBREGL(db_id));
> +
> + bool valid = drbregl & GEN8_DRB_VALID;
> +
> + if (test_bit(db_id, guc->doorbell_bitmap) == valid)
> return true;
>
> - DRM_DEBUG_DRIVER("Doorbell %d (reg 0x%x) 0x%x, should be %s\n",
> - db_id, drbreg.reg, value,
> - expected ? "active" : "inactive");
> + DRM_DEBUG_DRIVER("Doorbell %d has unexpected state (0x%x): valid=%s\n",
> + db_id, drbregl, yesno(valid));
>
> return false;
> }
>
> +static int __reset_doorbell(struct i915_guc_client* client, u16 db_id)
Hmm, in previous function db_id was declared as u8.
> +{
> + int err;
> +
> + err = __update_doorbell(client, db_id);
> + if (!err)
> + err = __create_doorbell(client);
> + if (!err)
> + err = __destroy_doorbell(client);
> +
> + return err;
> +}
> +
> /*
> * Borrow the first client to set up & tear down each unused doorbell
> * in turn, to ensure that all doorbell h/w is (re)initialised.
> */
> -static void guc_init_doorbell_hw(struct intel_guc *guc)
> +static int guc_init_doorbell_hw(struct intel_guc *guc)
> {
> struct i915_guc_client *client = guc->execbuf_client;
> - uint16_t db_id;
> - int i, err;
> + int err;
> + int i;
>
> - guc_disable_doorbell(guc, client);
> + if (has_doorbell(client))
> + destroy_doorbell(client);
>
> - for (i = 0; i < GUC_MAX_DOORBELLS; ++i) {
> - /* Skip if doorbell is OK */
> - if (guc_doorbell_check(guc, i))
> + for (i = 0; i < GUC_NUM_DOORBELLS; ++i) {
> + if (doorbell_ok(guc, i))
> continue;
>
> - err = guc_update_doorbell_id(guc, client, i);
> - if (err)
> - DRM_DEBUG_DRIVER("Doorbell %d update failed, err %d\n",
> - i, err);
> + err = __reset_doorbell(client, i);
> + WARN(err, "Doorbell %d reset failed, err %d\n", i, err);
> }
>
> - db_id = select_doorbell_register(guc, client->priority);
> - WARN_ON(db_id == GUC_INVALID_DOORBELL_ID);
> -
> - err = guc_update_doorbell_id(guc, client, db_id);
> + err = __reserve_doorbell(client);
> if (err)
> - DRM_WARN("Failed to restore doorbell to %d, err %d\n",
> - db_id, err);
> + return err;
>
> /* Read back & verify all doorbell registers */
> - for (i = 0; i < GUC_MAX_DOORBELLS; ++i)
> - (void)guc_doorbell_check(guc, i);
> + for (i = 0; i < GUC_NUM_DOORBELLS; ++i)
> + WARN_ON(!doorbell_ok(guc, i));
> +
> + return 0;
> }
>
> /**
> @@ -696,49 +743,52 @@ guc_client_alloc(struct drm_i915_private *dev_priv,
> struct intel_guc *guc = &dev_priv->guc;
> struct i915_vma *vma;
> void *vaddr;
> - uint16_t db_id;
> + int ret;
>
> client = kzalloc(sizeof(*client), GFP_KERNEL);
> if (!client)
> - return NULL;
> + return ERR_PTR(-ENOMEM);
>
> - client->owner = ctx;
> client->guc = guc;
> + client->owner = ctx;
> client->engines = engines;
> client->priority = priority;
> - client->doorbell_id = GUC_INVALID_DOORBELL_ID;
> + client->doorbell_id = GUC_DOORBELL_INVALID;
> + client->wq_offset = GUC_DB_SIZE;
> + client->wq_size = GUC_WQ_SIZE;
> + spin_lock_init(&client->wq_lock);
>
> - client->ctx_index = (uint32_t)ida_simple_get(&guc->ctx_ids, 0,
> - GUC_MAX_GPU_CONTEXTS, GFP_KERNEL);
> - if (client->ctx_index >= GUC_MAX_GPU_CONTEXTS) {
> - client->ctx_index = GUC_INVALID_CTX_ID;
> - goto err;
> - }
> + ret = ida_simple_get(&guc->ctx_ids, 0, GUC_MAX_GPU_CONTEXTS,
> + GFP_KERNEL);
> + if (ret < 0)
> + goto err_client;
> +
> + client->ctx_index = ret;
>
> /* The first page is doorbell/proc_desc. Two followed pages are wq. */
> vma = intel_guc_allocate_vma(guc, GUC_DB_SIZE + GUC_WQ_SIZE);
> - if (IS_ERR(vma))
> - goto err;
> + if (IS_ERR(vma)) {
> + ret = PTR_ERR(vma);
> + goto err_id;
> + }
>
> /* We'll keep just the first (doorbell/proc) page permanently kmap'd. */
> client->vma = vma;
>
> vaddr = i915_gem_object_pin_map(vma->obj, I915_MAP_WB);
> - if (IS_ERR(vaddr))
> - goto err;
> + if (IS_ERR(vaddr)) {
> + ret = PTR_ERR(vaddr);
> + goto err_vma;
> + }
>
> client->vaddr = vaddr;
>
> - spin_lock_init(&client->wq_lock);
> - client->wq_offset = GUC_DB_SIZE;
> - client->wq_size = GUC_WQ_SIZE;
> -
> - db_id = select_doorbell_register(guc, client->priority);
> - if (db_id == GUC_INVALID_DOORBELL_ID)
> + ret = __reserve_doorbell(client);
> + if (ret)
> /* XXX: evict a doorbell instead? */
> - goto err;
> + goto err_vaddr;
>
> - client->doorbell_offset = select_doorbell_cacheline(guc);
> + client->doorbell_offset = __reserve_cacheline(guc);
>
> /*
> * Since the doorbell only requires a single cacheline, we can save
> @@ -753,26 +803,31 @@ guc_client_alloc(struct drm_i915_private *dev_priv,
> guc_proc_desc_init(guc, client);
> guc_ctx_desc_init(guc, client);
>
> - /* For runtime client allocation we need to enable the doorbell. Not
> - * required yet for the static execbuf_client as this special kernel
> - * client is enabled from i915_guc_submission_enable().
> - *
> - * guc_update_doorbell_id(guc, client, db_id);
> - */
> + /* For runtime client allocation we need to enable the doorbell. */
> + ret = __create_doorbell(client);
> + if (ret)
> + goto err_db;
>
> DRM_DEBUG_DRIVER("new priority %u client %p for engine(s) 0x%x:
> ctx_index %u\n",
> - priority, client, client->engines, client->ctx_index);
> - DRM_DEBUG_DRIVER("doorbell id %u, cacheline offset 0x%x\n",
> - client->doorbell_id, client->doorbell_offset);
> + priority, client, client->engines, client->ctx_index);
> + DRM_DEBUG_DRIVER("doorbell id %u, cacheline offset 0x%lx\n",
> + client->doorbell_id, client->doorbell_offset);
>
> return client;
>
> -err:
> - guc_client_free(dev_priv, client);
> - return NULL;
> -}
> -
> +err_db:
> + __release_doorbell(client);
> +err_vaddr:
> + i915_gem_object_unpin_map(client->vma->obj);
> +err_vma:
> + i915_vma_unpin_and_release(&client->vma);
> +err_id:
> + ida_simple_remove(&guc->ctx_ids, client->ctx_index);
> +err_client:
> + kfree(client);
>
> + return ERR_PTR(ret);
> +}
>
> static void guc_policies_init(struct guc_policies *policies)
> {
> @@ -881,7 +936,7 @@ int i915_guc_submission_init(struct drm_i915_private
> *dev_priv)
> return 0;
>
> /* Wipe bitmap & delete client in case of reinitialisation */
> - bitmap_clear(guc->doorbell_bitmap, 0, GUC_MAX_DOORBELLS);
> + bitmap_clear(guc->doorbell_bitmap, 0, GUC_NUM_DOORBELLS);
> i915_guc_submission_disable(dev_priv);
>
> if (!i915.enable_guc_submission)
> @@ -932,14 +987,19 @@ int i915_guc_submission_enable(struct drm_i915_private
> *dev_priv)
> struct i915_guc_client *client = guc->execbuf_client;
> struct intel_engine_cs *engine;
> enum intel_engine_id id;
> + int err;
>
> if (!client)
> return -ENODEV;
>
> - intel_guc_sample_forcewake(guc);
> + err = intel_guc_sample_forcewake(guc);
> + if (err)
> + return err;
>
> guc_reset_wq(client);
> - guc_init_doorbell_hw(guc);
> + err = guc_init_doorbell_hw(guc);
> + if (err)
> + return err;
>
> /* Take over from manual control of ELSP (execlists) */
> for_each_engine(engine, dev_priv, id) {
> @@ -978,7 +1038,7 @@ void i915_guc_submission_fini(struct drm_i915_private
> *dev_priv)
> if (!client)
> return;
Shouldn't we fix it now in this patch as well?
>
> - guc_client_free(dev_priv, client);
> + guc_client_free(client);
>
> i915_vma_unpin_and_release(&guc->ads_vma);
> i915_vma_unpin_and_release(&guc->log.vma);
> diff --git a/drivers/gpu/drm/i915/intel_guc_fwif.h
> b/drivers/gpu/drm/i915/intel_guc_fwif.h
> index 25691f0..3ae8cef 100644
> --- a/drivers/gpu/drm/i915/intel_guc_fwif.h
> +++ b/drivers/gpu/drm/i915/intel_guc_fwif.h
> @@ -241,8 +241,8 @@ union guc_doorbell_qw {
> u64 value_qw;
> } __packed;
>
> -#define GUC_MAX_DOORBELLS 256
> -#define GUC_INVALID_DOORBELL_ID (GUC_MAX_DOORBELLS)
> +#define GUC_NUM_DOORBELLS 256
> +#define GUC_DOORBELL_INVALID (GUC_NUM_DOORBELLS)
>
> #define GUC_DB_SIZE (PAGE_SIZE)
> #define GUC_WQ_SIZE (PAGE_SIZE * 2)
> diff --git a/drivers/gpu/drm/i915/intel_uc.h b/drivers/gpu/drm/i915/intel_uc.h
> index d74f4d3..3cbf853 100644
> --- a/drivers/gpu/drm/i915/intel_uc.h
> +++ b/drivers/gpu/drm/i915/intel_uc.h
> @@ -75,10 +75,9 @@ struct i915_guc_client {
> uint32_t ctx_index;
> uint32_t proc_desc_offset;
>
> - uint32_t doorbell_offset;
> - uint32_t doorbell_cookie;
> - uint16_t doorbell_id;
> - uint16_t padding[3]; /* Maintain alignment */
> + u16 doorbell_id;
> + unsigned long doorbell_offset;
> + u32 doorbell_cookie;
>
> spinlock_t wq_lock;
> uint32_t wq_offset;
> @@ -159,7 +158,7 @@ struct intel_guc {
>
> struct i915_guc_client *execbuf_client;
>
> - DECLARE_BITMAP(doorbell_bitmap, GUC_MAX_DOORBELLS);
> + DECLARE_BITMAP(doorbell_bitmap, GUC_NUM_DOORBELLS);
> uint32_t db_cacheline; /* Cyclic counter mod pagesize */
>
> /* Action status & statistics */
> --
> 2.7.4
>
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