#include "i915_drv.h"
#include "intel_sideband.h"
-/*
- * IOSF sideband, see VLV2_SidebandMsg_HAS.docx and
- * VLV_VLV2_PUNIT_HAS_0.8.docx
- */
-
-/* Standard MMIO read, non-posted */
-#define SB_MRD_NP 0x00
-/* Standard MMIO write, non-posted */
-#define SB_MWR_NP 0x01
-/* Private register read, double-word addressing, non-posted */
-#define SB_CRRDDA_NP 0x06
-/* Private register write, double-word addressing, non-posted */
-#define SB_CRWRDA_NP 0x07
-
-static void ping(void *info)
-{
-}
-
-static void __vlv_punit_get(struct drm_i915_private *i915)
-{
- iosf_mbi_punit_acquire();
-
- /*
- * Prevent the cpu from sleeping while we use this sideband, otherwise
- * the punit may cause a machine hang. The issue appears to be isolated
- * with changing the power state of the CPU package while changing
- * the power state via the punit, and we have only observed it
- * reliably on 4-core Baytail systems suggesting the issue is in the
- * power delivery mechanism and likely to be be board/function
- * specific. Hence we presume the workaround needs only be applied
- * to the Valleyview P-unit and not all sideband communications.
- */
- if (IS_VALLEYVIEW(i915)) {
- cpu_latency_qos_update_request(&i915->sb_qos, 0);
- on_each_cpu(ping, NULL, 1);
- }
-}
-
-static void __vlv_punit_put(struct drm_i915_private *i915)
-{
- if (IS_VALLEYVIEW(i915))
- cpu_latency_qos_update_request(&i915->sb_qos,
- PM_QOS_DEFAULT_VALUE);
-
- iosf_mbi_punit_release();
-}
-
-void vlv_iosf_sb_get(struct drm_i915_private *i915, unsigned long ports)
-{
- if (ports & BIT(VLV_IOSF_SB_PUNIT))
- __vlv_punit_get(i915);
-
- mutex_lock(&i915->sb_lock);
-}
-
-void vlv_iosf_sb_put(struct drm_i915_private *i915, unsigned long ports)
-{
- mutex_unlock(&i915->sb_lock);
-
- if (ports & BIT(VLV_IOSF_SB_PUNIT))
- __vlv_punit_put(i915);
-}
-
-static int vlv_sideband_rw(struct drm_i915_private *i915,
- u32 devfn, u32 port, u32 opcode,
- u32 addr, u32 *val)
-{
- struct intel_uncore *uncore = &i915->uncore;
- const bool is_read = (opcode == SB_MRD_NP || opcode == SB_CRRDDA_NP);
- int err;
-
- lockdep_assert_held(&i915->sb_lock);
- if (port == IOSF_PORT_PUNIT)
- iosf_mbi_assert_punit_acquired();
-
- /* Flush the previous comms, just in case it failed last time. */
- if (intel_wait_for_register(uncore,
- VLV_IOSF_DOORBELL_REQ, IOSF_SB_BUSY, 0,
- 5)) {
- drm_dbg(&i915->drm, "IOSF sideband idle wait (%s) timed out\n",
- is_read ? "read" : "write");
- return -EAGAIN;
- }
-
- preempt_disable();
-
- intel_uncore_write_fw(uncore, VLV_IOSF_ADDR, addr);
- intel_uncore_write_fw(uncore, VLV_IOSF_DATA, is_read ? 0 : *val);
- intel_uncore_write_fw(uncore, VLV_IOSF_DOORBELL_REQ,
- (devfn << IOSF_DEVFN_SHIFT) |
- (opcode << IOSF_OPCODE_SHIFT) |
- (port << IOSF_PORT_SHIFT) |
- (0xf << IOSF_BYTE_ENABLES_SHIFT) |
- (0 << IOSF_BAR_SHIFT) |
- IOSF_SB_BUSY);
-
- if (__intel_wait_for_register_fw(uncore,
- VLV_IOSF_DOORBELL_REQ, IOSF_SB_BUSY, 0,
- 10000, 0, NULL) == 0) {
- if (is_read)
- *val = intel_uncore_read_fw(uncore, VLV_IOSF_DATA);
- err = 0;
- } else {
- drm_dbg(&i915->drm, "IOSF sideband finish wait (%s) timed out\n",
- is_read ? "read" : "write");
- err = -ETIMEDOUT;
- }
-
- preempt_enable();
-
- return err;
-}
-
-u32 vlv_punit_read(struct drm_i915_private *i915, u32 addr)
-{
- u32 val = 0;
-
- vlv_sideband_rw(i915, PCI_DEVFN(0, 0), IOSF_PORT_PUNIT,
- SB_CRRDDA_NP, addr, &val);
-
- return val;
-}
-
-int vlv_punit_write(struct drm_i915_private *i915, u32 addr, u32 val)
-{
- return vlv_sideband_rw(i915, PCI_DEVFN(0, 0), IOSF_PORT_PUNIT,
- SB_CRWRDA_NP, addr, &val);
-}
-
-u32 vlv_bunit_read(struct drm_i915_private *i915, u32 reg)
-{
- u32 val = 0;
-
- vlv_sideband_rw(i915, PCI_DEVFN(0, 0), IOSF_PORT_BUNIT,
- SB_CRRDDA_NP, reg, &val);
-
- return val;
-}
-
-void vlv_bunit_write(struct drm_i915_private *i915, u32 reg, u32 val)
-{
- vlv_sideband_rw(i915, PCI_DEVFN(0, 0), IOSF_PORT_BUNIT,
- SB_CRWRDA_NP, reg, &val);
-}
-
-u32 vlv_nc_read(struct drm_i915_private *i915, u8 addr)
-{
- u32 val = 0;
-
- vlv_sideband_rw(i915, PCI_DEVFN(0, 0), IOSF_PORT_NC,
- SB_CRRDDA_NP, addr, &val);
-
- return val;
-}
-
-u32 vlv_iosf_sb_read(struct drm_i915_private *i915, u8 port, u32 reg)
-{
- u32 val = 0;
-
- vlv_sideband_rw(i915, PCI_DEVFN(0, 0), port,
- SB_CRRDDA_NP, reg, &val);
-
- return val;
-}
-
-void vlv_iosf_sb_write(struct drm_i915_private *i915,
- u8 port, u32 reg, u32 val)
-{
- vlv_sideband_rw(i915, PCI_DEVFN(0, 0), port,
- SB_CRWRDA_NP, reg, &val);
-}
-
-u32 vlv_cck_read(struct drm_i915_private *i915, u32 reg)
-{
- u32 val = 0;
-
- vlv_sideband_rw(i915, PCI_DEVFN(0, 0), IOSF_PORT_CCK,
- SB_CRRDDA_NP, reg, &val);
-
- return val;
-}
-
-void vlv_cck_write(struct drm_i915_private *i915, u32 reg, u32 val)
-{
- vlv_sideband_rw(i915, PCI_DEVFN(0, 0), IOSF_PORT_CCK,
- SB_CRWRDA_NP, reg, &val);
-}
-
-u32 vlv_ccu_read(struct drm_i915_private *i915, u32 reg)
-{
- u32 val = 0;
-
- vlv_sideband_rw(i915, PCI_DEVFN(0, 0), IOSF_PORT_CCU,
- SB_CRRDDA_NP, reg, &val);
-
- return val;
-}
-
-void vlv_ccu_write(struct drm_i915_private *i915, u32 reg, u32 val)
-{
- vlv_sideband_rw(i915, PCI_DEVFN(0, 0), IOSF_PORT_CCU,
- SB_CRWRDA_NP, reg, &val);
-}
-
-static u32 vlv_dpio_phy_iosf_port(struct drm_i915_private *i915, enum dpio_phy phy)
-{
- /*
- * IOSF_PORT_DPIO: VLV x2 PHY (DP/HDMI B and C), CHV x1 PHY (DP/HDMI D)
- * IOSF_PORT_DPIO_2: CHV x2 PHY (DP/HDMI B and C)
- */
- if (IS_CHERRYVIEW(i915))
- return phy == DPIO_PHY0 ? IOSF_PORT_DPIO_2 : IOSF_PORT_DPIO;
- else
- return IOSF_PORT_DPIO;
-}
-
-u32 vlv_dpio_read(struct drm_i915_private *i915, enum pipe pipe, int reg)
-{
- u32 port = vlv_dpio_phy_iosf_port(i915, DPIO_PHY(pipe));
- u32 val = 0;
-
- vlv_sideband_rw(i915, DPIO_DEVFN, port, SB_MRD_NP, reg, &val);
-
- /*
- * FIXME: There might be some registers where all 1's is a valid value,
- * so ideally we should check the register offset instead...
- */
- drm_WARN(&i915->drm, val == 0xffffffff,
- "DPIO read pipe %c reg 0x%x == 0x%x\n",
- pipe_name(pipe), reg, val);
-
- return val;
-}
-
-void vlv_dpio_write(struct drm_i915_private *i915,
- enum pipe pipe, int reg, u32 val)
-{
- u32 port = vlv_dpio_phy_iosf_port(i915, DPIO_PHY(pipe));
-
- vlv_sideband_rw(i915, DPIO_DEVFN, port, SB_MWR_NP, reg, &val);
-}
-
-u32 vlv_flisdsi_read(struct drm_i915_private *i915, u32 reg)
-{
- u32 val = 0;
-
- vlv_sideband_rw(i915, DPIO_DEVFN, IOSF_PORT_FLISDSI, SB_CRRDDA_NP,
- reg, &val);
- return val;
-}
-
-void vlv_flisdsi_write(struct drm_i915_private *i915, u32 reg, u32 val)
-{
- vlv_sideband_rw(i915, DPIO_DEVFN, IOSF_PORT_FLISDSI, SB_CRWRDA_NP,
- reg, &val);
-}
-
/* SBI access */
static int intel_sbi_rw(struct drm_i915_private *i915, u16 reg,
enum intel_sbi_destination destination,
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