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path: root/drivers/gpu/drm/radeon/kv_smc.c
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Diffstat (limited to 'drivers/gpu/drm/radeon/kv_smc.c')
-rw-r--r--drivers/gpu/drm/radeon/kv_smc.c207
1 files changed, 207 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/kv_smc.c b/drivers/gpu/drm/radeon/kv_smc.c
new file mode 100644
index 000000000000..34a226d7e34a
--- /dev/null
+++ b/drivers/gpu/drm/radeon/kv_smc.c
@@ -0,0 +1,207 @@
+/*
+ * Copyright 2013 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Alex Deucher
+ */
+
+#include "drmP.h"
+#include "radeon.h"
+#include "cikd.h"
+#include "kv_dpm.h"
+
+int kv_notify_message_to_smu(struct radeon_device *rdev, u32 id)
+{
+ u32 i;
+ u32 tmp = 0;
+
+ WREG32(SMC_MESSAGE_0, id & SMC_MSG_MASK);
+
+ for (i = 0; i < rdev->usec_timeout; i++) {
+ if ((RREG32(SMC_RESP_0) & SMC_RESP_MASK) != 0)
+ break;
+ udelay(1);
+ }
+ tmp = RREG32(SMC_RESP_0) & SMC_RESP_MASK;
+
+ if (tmp != 1) {
+ if (tmp == 0xFF)
+ return -EINVAL;
+ else if (tmp == 0xFE)
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int kv_dpm_get_enable_mask(struct radeon_device *rdev, u32 *enable_mask)
+{
+ int ret;
+
+ ret = kv_notify_message_to_smu(rdev, PPSMC_MSG_SCLKDPM_GetEnabledMask);
+
+ if (ret == 0)
+ *enable_mask = RREG32_SMC(SMC_SYSCON_MSG_ARG_0);
+
+ return ret;
+}
+
+int kv_send_msg_to_smc_with_parameter(struct radeon_device *rdev,
+ PPSMC_Msg msg, u32 parameter)
+{
+
+ WREG32(SMC_MSG_ARG_0, parameter);
+
+ return kv_notify_message_to_smu(rdev, msg);
+}
+
+static int kv_set_smc_sram_address(struct radeon_device *rdev,
+ u32 smc_address, u32 limit)
+{
+ if (smc_address & 3)
+ return -EINVAL;
+ if ((smc_address + 3) > limit)
+ return -EINVAL;
+
+ WREG32(SMC_IND_INDEX_0, smc_address);
+ WREG32_P(SMC_IND_ACCESS_CNTL, 0, ~AUTO_INCREMENT_IND_0);
+
+ return 0;
+}
+
+int kv_read_smc_sram_dword(struct radeon_device *rdev, u32 smc_address,
+ u32 *value, u32 limit)
+{
+ int ret;
+
+ ret = kv_set_smc_sram_address(rdev, smc_address, limit);
+ if (ret)
+ return ret;
+
+ *value = RREG32(SMC_IND_DATA_0);
+ return 0;
+}
+
+int kv_smc_dpm_enable(struct radeon_device *rdev, bool enable)
+{
+ if (enable)
+ return kv_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Enable);
+ else
+ return kv_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Disable);
+}
+
+int kv_copy_bytes_to_smc(struct radeon_device *rdev,
+ u32 smc_start_address,
+ const u8 *src, u32 byte_count, u32 limit)
+{
+ int ret;
+ u32 data, original_data, addr, extra_shift, t_byte, count, mask;
+
+ if ((smc_start_address + byte_count) > limit)
+ return -EINVAL;
+
+ addr = smc_start_address;
+ t_byte = addr & 3;
+
+ /* RMW for the initial bytes */
+ if (t_byte != 0) {
+ addr -= t_byte;
+
+ ret = kv_set_smc_sram_address(rdev, addr, limit);
+ if (ret)
+ return ret;
+
+ original_data = RREG32(SMC_IND_DATA_0);
+
+ data = 0;
+ mask = 0;
+ count = 4;
+ while (count > 0) {
+ if (t_byte > 0) {
+ mask = (mask << 8) | 0xff;
+ t_byte--;
+ } else if (byte_count > 0) {
+ data = (data << 8) + *src++;
+ byte_count--;
+ mask <<= 8;
+ } else {
+ data <<= 8;
+ mask = (mask << 8) | 0xff;
+ }
+ count--;
+ }
+
+ data |= original_data & mask;
+
+ ret = kv_set_smc_sram_address(rdev, addr, limit);
+ if (ret)
+ return ret;
+
+ WREG32(SMC_IND_DATA_0, data);
+
+ addr += 4;
+ }
+
+ while (byte_count >= 4) {
+ /* SMC address space is BE */
+ data = (src[0] << 24) + (src[1] << 16) + (src[2] << 8) + src[3];
+
+ ret = kv_set_smc_sram_address(rdev, addr, limit);
+ if (ret)
+ return ret;
+
+ WREG32(SMC_IND_DATA_0, data);
+
+ src += 4;
+ byte_count -= 4;
+ addr += 4;
+ }
+
+ /* RMW for the final bytes */
+ if (byte_count > 0) {
+ data = 0;
+
+ ret = kv_set_smc_sram_address(rdev, addr, limit);
+ if (ret)
+ return ret;
+
+ original_data= RREG32(SMC_IND_DATA_0);
+
+ extra_shift = 8 * (4 - byte_count);
+
+ while (byte_count > 0) {
+ /* SMC address space is BE */
+ data = (data << 8) + *src++;
+ byte_count--;
+ }
+
+ data <<= extra_shift;
+
+ data |= (original_data & ~((~0UL) << extra_shift));
+
+ ret = kv_set_smc_sram_address(rdev, addr, limit);
+ if (ret)
+ return ret;
+
+ WREG32(SMC_IND_DATA_0, data);
+ }
+ return 0;
+}
+