drm/i915: [sparse] __iomem fixes for overlay

With the exception of a forced cast for phys_obj stuff (a problem in
other patches as well) all of these are fairly simple __iomem compliance
fixes.

As with other patches, yank/paste errors may exist.

Signed-off-by: Ben Widawsky <benjamin.widawsky@intel.com>
[danvet: Added comment to explain the __iomem cast.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 75 insertions, 58 deletions

diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c
index 80b331c322fb..0f0fe31fc466 100644
--- a/drivers/gpu/drm/i915/intel_overlay.c
+++ b/drivers/gpu/drm/i915/intel_overlay.c
@@ -187,14 +187,14 @@ struct intel_overlay {
         void (*flip_tail)(struct intel_overlay *);
 };
 
-static struct overlay_registers *
+static struct overlay_registers __iomem *
 intel_overlay_map_regs(struct intel_overlay *overlay)
 {
         drm_i915_private_t *dev_priv = overlay->dev->dev_private;
-        struct overlay_registers *regs;
+        struct overlay_registers __iomem *regs;
 
         if (OVERLAY_NEEDS_PHYSICAL(overlay->dev))
-                regs = overlay->reg_bo->phys_obj->handle->vaddr;
+                regs = (struct overlay_registers __iomem *)overlay->reg_bo->phys_obj->handle->vaddr;
         else
                 regs = io_mapping_map_wc(dev_priv->mm.gtt_mapping,
                                          overlay->reg_bo->gtt_offset);
@@ -203,7 +203,7 @@ intel_overlay_map_regs(struct intel_overlay *overlay)
 }
 
 static void intel_overlay_unmap_regs(struct intel_overlay *overlay,
-                                     struct overlay_registers *regs)
+                                     struct overlay_registers __iomem *regs)
 {
         if (!OVERLAY_NEEDS_PHYSICAL(overlay->dev))
                 io_mapping_unmap(regs);
@@ -619,14 +619,15 @@ static const u16 uv_static_hcoeffs[N_HORIZ_UV_TAPS * N_PHASES] = {
         0x3000, 0x0800, 0x3000
 };
 
-static void update_polyphase_filter(struct overlay_registers *regs)
+static void update_polyphase_filter(struct overlay_registers __iomem *regs)
 {
-        memcpy(regs->Y_HCOEFS, y_static_hcoeffs, sizeof(y_static_hcoeffs));
-        memcpy(regs->UV_HCOEFS, uv_static_hcoeffs, sizeof(uv_static_hcoeffs));
+        memcpy_toio(regs->Y_HCOEFS, y_static_hcoeffs, sizeof(y_static_hcoeffs));
+        memcpy_toio(regs->UV_HCOEFS, uv_static_hcoeffs,
+                    sizeof(uv_static_hcoeffs));
 }
 
 static bool update_scaling_factors(struct intel_overlay *overlay,
-                                   struct overlay_registers *regs,
+                                   struct overlay_registers __iomem *regs,
                                    struct put_image_params *params)
 {
         /* fixed point with a 12 bit shift */
@@ -665,16 +666,19 @@ static bool update_scaling_factors(struct intel_overlay *overlay,
         overlay->old_xscale = xscale;
         overlay->old_yscale = yscale;
 
-        regs->YRGBSCALE = (((yscale & FRACT_MASK) << 20) |
-                           ((xscale >> FP_SHIFT)  << 16) |
-                           ((xscale & FRACT_MASK) << 3));
+        iowrite32(((yscale & FRACT_MASK) << 20) |
+                  ((xscale >> FP_SHIFT)  << 16) |
+                  ((xscale & FRACT_MASK) << 3),
+                 &regs->YRGBSCALE);
 
-        regs->UVSCALE = (((yscale_UV & FRACT_MASK) << 20) |
-                         ((xscale_UV >> FP_SHIFT)  << 16) |
-                         ((xscale_UV & FRACT_MASK) << 3));
+        iowrite32(((yscale_UV & FRACT_MASK) << 20) |
+                  ((xscale_UV >> FP_SHIFT)  << 16) |
+                  ((xscale_UV & FRACT_MASK) << 3),
+                 &regs->UVSCALE);
 
-        regs->UVSCALEV = ((((yscale    >> FP_SHIFT) << 16) |
-                           ((yscale_UV >> FP_SHIFT) << 0)));
+        iowrite32((((yscale    >> FP_SHIFT) << 16) |
+                   ((yscale_UV >> FP_SHIFT) << 0)),
+                 &regs->UVSCALEV);
 
         if (scale_changed)
                 update_polyphase_filter(regs);
@@ -683,30 +687,32 @@ static bool update_scaling_factors(struct intel_overlay *overlay,
 }
 
 static void update_colorkey(struct intel_overlay *overlay,
-                            struct overlay_registers *regs)
+                            struct overlay_registers __iomem *regs)
 {
         u32 key = overlay->color_key;
 
         switch (overlay->crtc->base.fb->bits_per_pixel) {
         case 8:
-                regs->DCLRKV = 0;
-                regs->DCLRKM = CLK_RGB8I_MASK | DST_KEY_ENABLE;
+                iowrite32(0, &regs->DCLRKV);
+                iowrite32(CLK_RGB8I_MASK | DST_KEY_ENABLE, &regs->DCLRKM);
                 break;
 
         case 16:
                 if (overlay->crtc->base.fb->depth == 15) {
-                        regs->DCLRKV = RGB15_TO_COLORKEY(key);
-                        regs->DCLRKM = CLK_RGB15_MASK | DST_KEY_ENABLE;
+                        iowrite32(RGB15_TO_COLORKEY(key), &regs->DCLRKV);
+                        iowrite32(CLK_RGB15_MASK | DST_KEY_ENABLE,
+                                  &regs->DCLRKM);
                 } else {
-                        regs->DCLRKV = RGB16_TO_COLORKEY(key);
-                        regs->DCLRKM = CLK_RGB16_MASK | DST_KEY_ENABLE;
+                        iowrite32(RGB16_TO_COLORKEY(key), &regs->DCLRKV);
+                        iowrite32(CLK_RGB16_MASK | DST_KEY_ENABLE,
+                                  &regs->DCLRKM);
                 }
                 break;
 
         case 24:
         case 32:
-                regs->DCLRKV = key;
-                regs->DCLRKM = CLK_RGB24_MASK | DST_KEY_ENABLE;
+                iowrite32(key, &regs->DCLRKV);
+                iowrite32(CLK_RGB24_MASK | DST_KEY_ENABLE, &regs->DCLRKM);
                 break;
         }
 }
@@ -761,9 +767,10 @@ static int intel_overlay_do_put_image(struct intel_overlay *overlay,
                                       struct put_image_params *params)
 {
         int ret, tmp_width;
-        struct overlay_registers *regs;
+        struct overlay_registers __iomem *regs;
         bool scale_changed = false;
         struct drm_device *dev = overlay->dev;
+        u32 swidth, swidthsw, sheight, ostride;
 
         BUG_ON(!mutex_is_locked(&dev->struct_mutex));
         BUG_ON(!mutex_is_locked(&dev->mode_config.mutex));
@@ -782,16 +789,18 @@ static int intel_overlay_do_put_image(struct intel_overlay *overlay,
                 goto out_unpin;
 
         if (!overlay->active) {
+                u32 oconfig;
                 regs = intel_overlay_map_regs(overlay);
                 if (!regs) {
                         ret = -ENOMEM;
                         goto out_unpin;
                 }
-                regs->OCONFIG = OCONF_CC_OUT_8BIT;
+                oconfig = OCONF_CC_OUT_8BIT;
                 if (IS_GEN4(overlay->dev))
-                        regs->OCONFIG |= OCONF_CSC_MODE_BT709;
-                regs->OCONFIG |= overlay->crtc->pipe == 0 ?
+                        oconfig |= OCONF_CSC_MODE_BT709;
+                oconfig |= overlay->crtc->pipe == 0 ?
                         OCONF_PIPE_A : OCONF_PIPE_B;
+                iowrite32(oconfig, &regs->OCONFIG);
                 intel_overlay_unmap_regs(overlay, regs);
 
                 ret = intel_overlay_on(overlay);
@@ -805,42 +814,46 @@ static int intel_overlay_do_put_image(struct intel_overlay *overlay,
                 goto out_unpin;
         }
 
-        regs->DWINPOS = (params->dst_y << 16) | params->dst_x;
-        regs->DWINSZ = (params->dst_h << 16) | params->dst_w;
+        iowrite32((params->dst_y << 16) | params->dst_x, &regs->DWINPOS);
+        iowrite32((params->dst_h << 16) | params->dst_w, &regs->DWINSZ);
 
         if (params->format & I915_OVERLAY_YUV_PACKED)
                 tmp_width = packed_width_bytes(params->format, params->src_w);
         else
                 tmp_width = params->src_w;
 
-        regs->SWIDTH = params->src_w;
-        regs->SWIDTHSW = calc_swidthsw(overlay->dev,
-                                       params->offset_Y, tmp_width);
-        regs->SHEIGHT = params->src_h;
-        regs->OBUF_0Y = new_bo->gtt_offset + params->offset_Y;
-        regs->OSTRIDE = params->stride_Y;
+        swidth = params->src_w;
+        swidthsw = calc_swidthsw(overlay->dev, params->offset_Y, tmp_width);
+        sheight = params->src_h;
+        iowrite32(new_bo->gtt_offset + params->offset_Y, &regs->OBUF_0Y);
+        ostride = params->stride_Y;
 
         if (params->format & I915_OVERLAY_YUV_PLANAR) {
                 int uv_hscale = uv_hsubsampling(params->format);
                 int uv_vscale = uv_vsubsampling(params->format);
                 u32 tmp_U, tmp_V;
-                regs->SWIDTH |= (params->src_w/uv_hscale) << 16;
+                swidth |= (params->src_w/uv_hscale) << 16;
                 tmp_U = calc_swidthsw(overlay->dev, params->offset_U,
                                       params->src_w/uv_hscale);
                 tmp_V = calc_swidthsw(overlay->dev, params->offset_V,
                                       params->src_w/uv_hscale);
-                regs->SWIDTHSW |= max_t(u32, tmp_U, tmp_V) << 16;
-                regs->SHEIGHT |= (params->src_h/uv_vscale) << 16;
-                regs->OBUF_0U = new_bo->gtt_offset + params->offset_U;
-                regs->OBUF_0V = new_bo->gtt_offset + params->offset_V;
-                regs->OSTRIDE |= params->stride_UV << 16;
+                swidthsw |= max_t(u32, tmp_U, tmp_V) << 16;
+                sheight |= (params->src_h/uv_vscale) << 16;
+                iowrite32(new_bo->gtt_offset + params->offset_U, &regs->OBUF_0U);
+                iowrite32(new_bo->gtt_offset + params->offset_V, &regs->OBUF_0V);
+                ostride |= params->stride_UV << 16;
         }
 
+        iowrite32(swidth, &regs->SWIDTH);
+        iowrite32(swidthsw, &regs->SWIDTHSW);
+        iowrite32(sheight, &regs->SHEIGHT);
+        iowrite32(ostride, &regs->OSTRIDE);
+
         scale_changed = update_scaling_factors(overlay, regs, params);
 
         update_colorkey(overlay, regs);
 
-        regs->OCMD = overlay_cmd_reg(params);
+        iowrite32(overlay_cmd_reg(params), &regs->OCMD);
 
         intel_overlay_unmap_regs(overlay, regs);
 
@@ -860,7 +873,7 @@ out_unpin:
 
 int intel_overlay_switch_off(struct intel_overlay *overlay)
 {
-        struct overlay_registers *regs;
+        struct overlay_registers __iomem *regs;
         struct drm_device *dev = overlay->dev;
         int ret;
 
@@ -879,7 +892,7 @@ int intel_overlay_switch_off(struct intel_overlay *overlay)
                 return ret;
 
         regs = intel_overlay_map_regs(overlay);
-        regs->OCMD = 0;
+        iowrite32(0, &regs->OCMD);
         intel_overlay_unmap_regs(overlay, regs);
 
         ret = intel_overlay_off(overlay);
@@ -1250,10 +1263,11 @@ out_free:
 }
 
 static void update_reg_attrs(struct intel_overlay *overlay,
-                             struct overlay_registers *regs)
+                             struct overlay_registers __iomem *regs)
 {
-        regs->OCLRC0 = (overlay->contrast << 18) | (overlay->brightness & 0xff);
-        regs->OCLRC1 = overlay->saturation;
+        iowrite32((overlay->contrast << 18) | (overlay->brightness & 0xff),
+                  &regs->OCLRC0);
+        iowrite32(overlay->saturation, &regs->OCLRC1);
 }
 
 static bool check_gamma_bounds(u32 gamma1, u32 gamma2)
@@ -1306,7 +1320,7 @@ int intel_overlay_attrs(struct drm_device *dev, void *data,
         struct drm_intel_overlay_attrs *attrs = data;
         drm_i915_private_t *dev_priv = dev->dev_private;
         struct intel_overlay *overlay;
-        struct overlay_registers *regs;
+        struct overlay_registers __iomem *regs;
         int ret;
 
         if (!dev_priv) {
@@ -1396,7 +1410,7 @@ void intel_setup_overlay(struct drm_device *dev)
         drm_i915_private_t *dev_priv = dev->dev_private;
         struct intel_overlay *overlay;
         struct drm_i915_gem_object *reg_bo;
-        struct overlay_registers *regs;
+        struct overlay_registers __iomem *regs;
         int ret;
 
         if (!HAS_OVERLAY(dev))
@@ -1451,7 +1465,7 @@ void intel_setup_overlay(struct drm_device *dev)
         if (!regs)
                 goto out_unpin_bo;
 
-        memset(regs, 0, sizeof(struct overlay_registers));
+        memset_io(regs, 0, sizeof(struct overlay_registers));
         update_polyphase_filter(regs);
         update_reg_attrs(overlay, regs);
 
@@ -1499,14 +1513,17 @@ struct intel_overlay_error_state {
         u32 isr;
 };
 
-static struct overlay_registers *
+static struct overlay_registers __iomem *
 intel_overlay_map_regs_atomic(struct intel_overlay *overlay)
 {
         drm_i915_private_t *dev_priv = overlay->dev->dev_private;
-        struct overlay_registers *regs;
+        struct overlay_registers __iomem *regs;
 
         if (OVERLAY_NEEDS_PHYSICAL(overlay->dev))
-                regs = overlay->reg_bo->phys_obj->handle->vaddr;
+                /* Cast to make sparse happy, but it's wc memory anyway, so
+                 * equivalent to the wc io mapping on X86. */
+                regs = (struct overlay_registers __iomem *)
+                        overlay->reg_bo->phys_obj->handle->vaddr;
         else
                 regs = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping,
                                                 overlay->reg_bo->gtt_offset);
@@ -1515,7 +1532,7 @@ intel_overlay_map_regs_atomic(struct intel_overlay *overlay)
 }
 
 static void intel_overlay_unmap_regs_atomic(struct intel_overlay *overlay,
-                                            struct overlay_registers *regs)
+                                        struct overlay_registers __iomem *regs)
 {
         if (!OVERLAY_NEEDS_PHYSICAL(overlay->dev))
                 io_mapping_unmap_atomic(regs);
@@ -1540,9 +1557,9 @@ intel_overlay_capture_error_state(struct drm_device *dev)
         error->dovsta = I915_READ(DOVSTA);
         error->isr = I915_READ(ISR);
         if (OVERLAY_NEEDS_PHYSICAL(overlay->dev))
-                error->base = (long) overlay->reg_bo->phys_obj->handle->vaddr;
+                error->base = (__force long)overlay->reg_bo->phys_obj->handle->vaddr;
         else
-                error->base = (long) overlay->reg_bo->gtt_offset;
+                error->base = overlay->reg_bo->gtt_offset;
 
         regs = intel_overlay_map_regs_atomic(overlay);
         if (!regs)