Re: [PATCH 8/8] drm/i915: Enum forcewake domains and domain identifiers

Deepak S
2014-12-11T13:24:54Z

On Tuesday 09 December 2014 05:16 PM, Mika Kuoppala wrote:
> Make the domains and domain identifiers enums. To emphasize
> the difference in order to avoid mistakes.
>
> Suggested-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
> ---
> drivers/gpu/drm/i915/i915_drv.h | 41 +++++++++++++++++----------------
> drivers/gpu/drm/i915/intel_uncore.c | 45 +++++++++++++++++++------------------
> 2 files changed, 45 insertions(+), 41 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 0d47397..5c6c372 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -533,11 +533,28 @@ struct drm_i915_display_funcs {
> void (*enable_backlight)(struct intel_connector *connector);
> };
>
> +enum fw_domain_id {
> + FW_DOMAIN_ID_RENDER = 0,
> + FW_DOMAIN_ID_BLITTER,
> + FW_DOMAIN_ID_MEDIA,
> +
> + FW_DOMAIN_ID_COUNT
> +};
> +
> +enum fw_domains {
> + FORCEWAKE_RENDER = (1 << FW_DOMAIN_ID_RENDER),
> + FORCEWAKE_BLITTER = (1 << FW_DOMAIN_ID_BLITTER),
> + FORCEWAKE_MEDIA = (1 << FW_DOMAIN_ID_MEDIA),
> + FORCEWAKE_ALL = (FORCEWAKE_RENDER |
> + FORCEWAKE_BLITTER |
> + FORCEWAKE_MEDIA)
> +};
> +
> struct intel_uncore_funcs {
> void (*force_wake_get)(struct drm_i915_private *dev_priv,
> - int fw_engine);
> + enum fw_domains domains);
> void (*force_wake_put)(struct drm_i915_private *dev_priv,
> - int fw_engine);
> + enum fw_domains domains);
>
> uint8_t (*mmio_readb)(struct drm_i915_private *dev_priv, off_t offset, bool trace);
> uint16_t (*mmio_readw)(struct drm_i915_private *dev_priv, off_t offset, bool trace);
> @@ -554,25 +571,17 @@ struct intel_uncore_funcs {
> uint64_t val, bool trace);
> };
>
> -enum {
> - FW_DOMAIN_ID_RENDER = 0,
> - FW_DOMAIN_ID_BLITTER,
> - FW_DOMAIN_ID_MEDIA,
> -
> - FW_DOMAIN_ID_COUNT
> -};
> -
> struct intel_uncore {
> spinlock_t lock; /** lock is also taken in irq contexts. */
>
> struct intel_uncore_funcs funcs;
>
> unsigned fifo_count;
> - unsigned fw_domains;
> + enum fw_domains fw_domains;
>
> struct intel_uncore_forcewake_domain {
> struct drm_i915_private *i915;
> - int id;
> + enum fw_domain_id id;
> unsigned wake_count;
> struct timer_list timer;
> u32 reg_set;
> @@ -582,12 +591,6 @@ struct intel_uncore {
> u32 reg_post;
> u32 val_reset;
> } fw_domain[FW_DOMAIN_ID_COUNT];
> -#define FORCEWAKE_RENDER (1 << FW_DOMAIN_ID_RENDER)
> -#define FORCEWAKE_BLITTER (1 << FW_DOMAIN_ID_BLITTER)
> -#define FORCEWAKE_MEDIA (1 << FW_DOMAIN_ID_MEDIA)
> -#define FORCEWAKE_ALL (FORCEWAKE_RENDER | \
> - FORCEWAKE_BLITTER | \
> - FORCEWAKE_MEDIA)
> };
>
> /* Iterate over initialised fw domains */
> @@ -2449,7 +2452,7 @@ extern void intel_uncore_init(struct drm_device *dev);
> extern void intel_uncore_check_errors(struct drm_device *dev);
> extern void intel_uncore_fini(struct drm_device *dev);
> extern void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore);
> -const char *intel_uncore_forcewake_domain_to_str(const int domain_id);
> +const char *intel_uncore_forcewake_domain_to_str(const enum fw_domain_id id);
> void intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
> unsigned fw_domains);
> void intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
> diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
> index 509b9c9..e802486 100644
> --- a/drivers/gpu/drm/i915/intel_uncore.c
> +++ b/drivers/gpu/drm/i915/intel_uncore.c
> @@ -49,7 +49,7 @@ static const char * const forcewake_domain_names[] = {
> };
>
> const char *
> -intel_uncore_forcewake_domain_to_str(const int id)
> +intel_uncore_forcewake_domain_to_str(const enum fw_domain_id id)
> {
> BUILD_BUG_ON((sizeof(forcewake_domain_names)/sizeof(const char *)) !=
> FW_DOMAIN_ID_COUNT);
> @@ -122,10 +122,10 @@ fw_domain_posting_read(const struct intel_uncore_forcewake_domain *d)
> }
>
> static void
> -fw_domains_get(struct drm_i915_private *dev_priv, int fw_domains)
> +fw_domains_get(struct drm_i915_private *dev_priv, enum fw_domains fw_domains)
> {
> struct intel_uncore_forcewake_domain *d;
> - int id;
> + enum fw_domain_id id;
>
> for_each_fw_domain_mask(d, fw_domains, dev_priv, id) {
> fw_domain_wait_ack_clear(d);
> @@ -136,10 +136,10 @@ fw_domains_get(struct drm_i915_private *dev_priv, int fw_domains)
> }
>
> static void
> -fw_domains_put(struct drm_i915_private *dev_priv, int fw_domains)
> +fw_domains_put(struct drm_i915_private *dev_priv, enum fw_domains fw_domains)
> {
> struct intel_uncore_forcewake_domain *d;
> - int id;
> + enum fw_domain_id id;
>
> for_each_fw_domain_mask(d, fw_domains, dev_priv, id)
> fw_domain_put(d);
> @@ -149,7 +149,7 @@ static void
> fw_domains_posting_read(struct drm_i915_private *dev_priv)
> {
> struct intel_uncore_forcewake_domain *d;
> - int id;
> + enum fw_domain_id id;
>
> /* No need to do for all, just do for first found */
> for_each_fw_domain(d, dev_priv, id) {
> @@ -159,10 +159,10 @@ fw_domains_posting_read(struct drm_i915_private *dev_priv)
> }
>
> static void
> -fw_domains_reset(struct drm_i915_private *dev_priv, const unsigned fw_domains)
> +fw_domains_reset(struct drm_i915_private *dev_priv, enum fw_domains fw_domains)
> {
> struct intel_uncore_forcewake_domain *d;
> - int id;
> + enum fw_domain_id id;
>
> for_each_fw_domain_mask(d, fw_domains, dev_priv, id)
> fw_domain_reset(d);
> @@ -181,7 +181,7 @@ static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private *dev_priv)
> }
>
> static void fw_domains_get_with_thread_status(struct drm_i915_private *dev_priv,
> - int fw_domains)
> + enum fw_domains fw_domains)
> {
> fw_domains_get(dev_priv, fw_domains);
>
> @@ -199,7 +199,7 @@ static void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv)
> }
>
> static void fw_domains_put_with_fifo(struct drm_i915_private *dev_priv,
> - int fw_domains)
> + enum fw_domains fw_domains)
> {
> fw_domains_put(dev_priv, fw_domains);
> gen6_gt_check_fifodbg(dev_priv);
> @@ -251,9 +251,10 @@ static void intel_uncore_fw_release_timer(unsigned long arg)
> void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore)
> {
> struct drm_i915_private *dev_priv = dev->dev_private;
> - unsigned long irqflags, fw = 0;
> + unsigned long irqflags;
> struct intel_uncore_forcewake_domain *domain;
> - int id;
> + enum fw_domain_id id;
> + enum fw_domains fw = 0;
>
> /* Hold uncore.lock across reset to prevent any register access
> * with forcewake not set correctly
> @@ -329,11 +330,11 @@ void intel_uncore_sanitize(struct drm_device *dev)
> * intel_uncore_forcewake_put() at the end of the sequence.
> */
> void intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
> - unsigned fw_domains)
> + enum fw_domains fw_domains)
> {
> unsigned long irqflags;
> struct intel_uncore_forcewake_domain *domain;
> - int id;
> + enum fw_domain_id id;
>
> if (!dev_priv->uncore.funcs.force_wake_get)
> return;
> @@ -358,11 +359,11 @@ void intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
> * see intel_uncore_forcewake_get()
> */
> void intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
> - unsigned fw_domains)
> + enum fw_domains fw_domains)
> {
> unsigned long irqflags;
> struct intel_uncore_forcewake_domain *domain;
> - int id;
> + enum fw_domain_id id;
>
> if (!dev_priv->uncore.funcs.force_wake_put)
> return;
> @@ -386,7 +387,7 @@ void intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
> void assert_forcewakes_inactive(struct drm_i915_private *dev_priv)
> {
> struct intel_uncore_forcewake_domain *domain;
> - int id;
> + enum fw_domain_id id;
>
> if (!dev_priv->uncore.funcs.force_wake_get)
> return;
> @@ -559,10 +560,10 @@ __gen2_read(64)
> return val
>
> static inline void __force_wake_get(struct drm_i915_private *dev_priv,
> - unsigned fw_domains)
> + enum fw_domains fw_domains)
> {
> struct intel_uncore_forcewake_domain *domain;
> - int id;
> + enum fw_domain_id id;
>
> if (WARN_ON(!fw_domains))
> return;
> @@ -626,7 +627,7 @@ chv_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
> #define __gen9_read(x) \
> static u##x \
> gen9_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
> - unsigned fw_engine; \
> + enum fw_domains fw_engine; \
> GEN6_READ_HEADER(x); \
> if (!SKL_NEEDS_FORCE_WAKE((dev_priv), (reg))) \
> fw_engine = 0; \
> @@ -826,7 +827,7 @@ static bool is_gen9_shadowed(struct drm_i915_private *dev_priv, u32 reg)
> static void \
> gen9_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, \
> bool trace) { \
> - unsigned fw_engine; \
> + enum fw_domains fw_engine; \
> GEN6_WRITE_HEADER; \
> if (!SKL_NEEDS_FORCE_WAKE((dev_priv), (reg)) || \
> is_gen9_shadowed(dev_priv, reg)) \
> @@ -892,7 +893,7 @@ do { \
>
>
> static void fw_domain_init(struct drm_i915_private *dev_priv,
> - u32 domain_id, u32 reg_set, u32 reg_ack)
> + enum fw_domain_id domain_id, u32 reg_set, u32 reg_ack)
> {
> struct intel_uncore_forcewake_domain *d;
>

Looks fine
Reviewed-by: Deepak S<deepak.s@linux.intel.com>