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authorTzung-Bi Shih <tzungbi@google.com>2021-01-27 16:31:36 +0800
committerBjorn Andersson <bjorn.andersson@linaro.org>2021-02-09 09:08:47 -0600
commitca23ecfdbd44bac02cb6964a3793c565a389af96 (patch)
tree3d4d91a69aa1e950b89943a8b5c6957698d8fa51
parent503c64cc42f15799ba0fdc654b6640911aaf7c34 (diff)
remoteproc/mediatek: support L1TCM
L1TCM is a high performance memory region in MT8192 SCP. Reads L1TCM memory region from DTS to determine if the machine supports. Loads L1TCM memory region to SCP sys if the firmware provides. Starts from MT8192 SCP, the firmware contains physical addresses for each memory region, for instance: Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align LOAD 0xXXXXXX 0xXXXXXXXX 0x10500000 0xXXXXX 0xXXXXX XXX 0xXXXX LOAD 0xXXXXXX 0xXXXXXXXX 0x10700000 0xXXXXX 0xXXXXX XXX 0xXXXX LOAD 0xXXXXXX 0xXXXXXXXX 0x50000000 0xXXXXX 0xXXXXX XXX 0xXXXX Kernel driver can use the "PhysAddr" (i.e. da in the da_to_va callbacks) to know the ELF segment belongs to which region. To backward compatible to MT8183 SCP, separates the da_to_va callbacks for new and legacy version. Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Tzung-Bi Shih <tzungbi@google.com> Link: https://lore.kernel.org/r/20210127083136.3745652-5-tzungbi@google.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
-rw-r--r--drivers/remoteproc/mtk_common.h5
-rw-r--r--drivers/remoteproc/mtk_scp.c56
2 files changed, 59 insertions, 2 deletions
diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
index 204691138677..61901f5efa05 100644
--- a/drivers/remoteproc/mtk_common.h
+++ b/drivers/remoteproc/mtk_common.h
@@ -77,6 +77,7 @@ struct mtk_scp_of_data {
void (*scp_reset_assert)(struct mtk_scp *scp);
void (*scp_reset_deassert)(struct mtk_scp *scp);
void (*scp_stop)(struct mtk_scp *scp);
+ void *(*scp_da_to_va)(struct mtk_scp *scp, u64 da, size_t len);
u32 host_to_scp_reg;
u32 host_to_scp_int_bit;
@@ -91,6 +92,10 @@ struct mtk_scp {
void __iomem *reg_base;
void __iomem *sram_base;
size_t sram_size;
+ phys_addr_t sram_phys;
+ void __iomem *l1tcm_base;
+ size_t l1tcm_size;
+ phys_addr_t l1tcm_phys;
const struct mtk_scp_of_data *data;
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index 05b157689121..ce727598c41c 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -463,9 +463,8 @@ stop:
return ret;
}
-static void *scp_da_to_va(struct rproc *rproc, u64 da, size_t len)
+static void *mt8183_scp_da_to_va(struct mtk_scp *scp, u64 da, size_t len)
{
- struct mtk_scp *scp = (struct mtk_scp *)rproc->priv;
int offset;
if (da < scp->sram_size) {
@@ -481,6 +480,42 @@ static void *scp_da_to_va(struct rproc *rproc, u64 da, size_t len)
return NULL;
}
+static void *mt8192_scp_da_to_va(struct mtk_scp *scp, u64 da, size_t len)
+{
+ int offset;
+
+ if (da >= scp->sram_phys &&
+ (da + len) <= scp->sram_phys + scp->sram_size) {
+ offset = da - scp->sram_phys;
+ return (void __force *)scp->sram_base + offset;
+ }
+
+ /* optional memory region */
+ if (scp->l1tcm_size &&
+ da >= scp->l1tcm_phys &&
+ (da + len) <= scp->l1tcm_phys + scp->l1tcm_size) {
+ offset = da - scp->l1tcm_phys;
+ return (void __force *)scp->l1tcm_base + offset;
+ }
+
+ /* optional memory region */
+ if (scp->dram_size &&
+ da >= scp->dma_addr &&
+ (da + len) <= scp->dma_addr + scp->dram_size) {
+ offset = da - scp->dma_addr;
+ return scp->cpu_addr + offset;
+ }
+
+ return NULL;
+}
+
+static void *scp_da_to_va(struct rproc *rproc, u64 da, size_t len)
+{
+ struct mtk_scp *scp = (struct mtk_scp *)rproc->priv;
+
+ return scp->data->scp_da_to_va(scp, da, len);
+}
+
static void mt8183_scp_stop(struct mtk_scp *scp)
{
/* Disable SCP watchdog */
@@ -719,6 +754,21 @@ static int scp_probe(struct platform_device *pdev)
goto free_rproc;
}
scp->sram_size = resource_size(res);
+ scp->sram_phys = res->start;
+
+ /* l1tcm is an optional memory region */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "l1tcm");
+ scp->l1tcm_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR((__force void *)scp->l1tcm_base)) {
+ ret = PTR_ERR((__force void *)scp->l1tcm_base);
+ if (ret != -EINVAL) {
+ dev_err(dev, "Failed to map l1tcm memory\n");
+ goto free_rproc;
+ }
+ } else {
+ scp->l1tcm_size = resource_size(res);
+ scp->l1tcm_phys = res->start;
+ }
mutex_init(&scp->send_lock);
for (i = 0; i < SCP_IPI_MAX; i++)
@@ -807,6 +857,7 @@ static const struct mtk_scp_of_data mt8183_of_data = {
.scp_reset_assert = mt8183_scp_reset_assert,
.scp_reset_deassert = mt8183_scp_reset_deassert,
.scp_stop = mt8183_scp_stop,
+ .scp_da_to_va = mt8183_scp_da_to_va,
.host_to_scp_reg = MT8183_HOST_TO_SCP,
.host_to_scp_int_bit = MT8183_HOST_IPC_INT_BIT,
.ipi_buf_offset = 0x7bdb0,
@@ -818,6 +869,7 @@ static const struct mtk_scp_of_data mt8192_of_data = {
.scp_reset_assert = mt8192_scp_reset_assert,
.scp_reset_deassert = mt8192_scp_reset_deassert,
.scp_stop = mt8192_scp_stop,
+ .scp_da_to_va = mt8192_scp_da_to_va,
.host_to_scp_reg = MT8192_GIPC_IN_SET,
.host_to_scp_int_bit = MT8192_HOST_IPC_INT_BIT,
};