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Date: Mon, 29 Aug 2022 12:22:48 +0300
From: Oded Gabbay <ogabbay@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Dafna Hirschfeld <dhirschfeld@...ana.ai>
Subject: [PATCH 1/7] habanalabs: set command buffer host VA dynamically
From: Dafna Hirschfeld <dhirschfeld@...ana.ai>
Set the addresses for userspace command buffer dynamically
instead of hard-coded. There is no reason for it to
be hard-coded.
Signed-off-by: Dafna Hirschfeld <dhirschfeld@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
.../misc/habanalabs/common/command_buffer.c | 18 ++++++++++++++----
drivers/misc/habanalabs/common/habanalabs.h | 10 +++-------
drivers/misc/habanalabs/common/memory.c | 2 +-
drivers/misc/habanalabs/gaudi2/gaudi2.c | 3 ---
drivers/misc/habanalabs/gaudi2/gaudi2P.h | 3 ---
5 files changed, 18 insertions(+), 18 deletions(-)
diff --git a/drivers/misc/habanalabs/common/command_buffer.c b/drivers/misc/habanalabs/common/command_buffer.c
index b027f66f8bd4..c3e2568542a1 100644
--- a/drivers/misc/habanalabs/common/command_buffer.c
+++ b/drivers/misc/habanalabs/common/command_buffer.c
@@ -12,6 +12,8 @@
#include <linux/slab.h>
#include <linux/uaccess.h>
+#define CB_VA_POOL_SIZE (4UL * SZ_1G)
+
static int cb_map_mem(struct hl_ctx *ctx, struct hl_cb *cb)
{
struct hl_device *hdev = ctx->hdev;
@@ -25,7 +27,7 @@ static int cb_map_mem(struct hl_ctx *ctx, struct hl_cb *cb)
if (!hdev->supports_cb_mapping) {
dev_err_ratelimited(hdev->dev,
- "Cannot map CB because no VA range is allocated for CB mapping\n");
+ "Mapping a CB to the device's MMU is not supported\n");
return -EINVAL;
}
@@ -566,16 +568,23 @@ int hl_cb_va_pool_init(struct hl_ctx *ctx)
return -ENOMEM;
}
- rc = gen_pool_add(ctx->cb_va_pool, prop->cb_va_start_addr,
- prop->cb_va_end_addr - prop->cb_va_start_addr, -1);
+ ctx->cb_va_pool_base = hl_reserve_va_block(hdev, ctx, HL_VA_RANGE_TYPE_HOST,
+ CB_VA_POOL_SIZE, HL_MMU_VA_ALIGNMENT_NOT_NEEDED);
+ if (!ctx->cb_va_pool_base) {
+ rc = -ENOMEM;
+ goto err_pool_destroy;
+ }
+ rc = gen_pool_add(ctx->cb_va_pool, ctx->cb_va_pool_base, CB_VA_POOL_SIZE, -1);
if (rc) {
dev_err(hdev->dev,
"Failed to add memory to VA gen pool for CB mapping\n");
- goto err_pool_destroy;
+ goto err_unreserve_va_block;
}
return 0;
+err_unreserve_va_block:
+ hl_unreserve_va_block(hdev, ctx, ctx->cb_va_pool_base, CB_VA_POOL_SIZE);
err_pool_destroy:
gen_pool_destroy(ctx->cb_va_pool);
@@ -590,4 +599,5 @@ void hl_cb_va_pool_fini(struct hl_ctx *ctx)
return;
gen_pool_destroy(ctx->cb_va_pool);
+ hl_unreserve_va_block(hdev, ctx, ctx->cb_va_pool_base, CB_VA_POOL_SIZE);
}
diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h
index 43b9427d9c97..d7fd4f57abf3 100644
--- a/drivers/misc/habanalabs/common/habanalabs.h
+++ b/drivers/misc/habanalabs/common/habanalabs.h
@@ -567,10 +567,6 @@ struct hl_hints_range {
* @tpc_binning_mask: which TPCs are binned. 0 means usable and 1 means binned.
* @dram_enabled_mask: which DRAMs are enabled.
* @dram_binning_mask: which DRAMs are binned. 0 means usable, 1 means binned.
- * @cb_va_start_addr: virtual start address of command buffers which are mapped
- * to the device's MMU.
- * @cb_va_end_addr: virtual end address of command buffers which are mapped to
- * the device's MMU.
* @dram_hints_align_mask: dram va hint addresses alignment mask which is used
* for hints validity check.
* @cfg_base_address: config space base address.
@@ -713,8 +709,6 @@ struct asic_fixed_properties {
u64 tpc_binning_mask;
u64 dram_enabled_mask;
u64 dram_binning_mask;
- u64 cb_va_start_addr;
- u64 cb_va_end_addr;
u64 dram_hints_align_mask;
u64 cfg_base_address;
u64 mmu_cache_mng_addr;
@@ -1803,6 +1797,7 @@ struct hl_cs_outcome_store {
* @cb_va_pool: device VA pool for command buffers which are mapped to the
* device's MMU.
* @sig_mgr: encaps signals handle manager.
+ * @cb_va_pool_base: the base address for the device VA pool
* @cs_sequence: sequence number for CS. Value is assigned to a CS and passed
* to user so user could inquire about CS. It is used as
* index to cs_pending array.
@@ -1838,6 +1833,7 @@ struct hl_ctx {
struct hl_cs_counters_atomic cs_counters;
struct gen_pool *cb_va_pool;
struct hl_encaps_signals_mgr sig_mgr;
+ u64 cb_va_pool_base;
u64 cs_sequence;
u64 *dram_default_hops;
spinlock_t cs_lock;
@@ -3600,7 +3596,7 @@ void hl_hw_block_mem_init(struct hl_ctx *ctx);
void hl_hw_block_mem_fini(struct hl_ctx *ctx);
u64 hl_reserve_va_block(struct hl_device *hdev, struct hl_ctx *ctx,
- enum hl_va_range_type type, u32 size, u32 alignment);
+ enum hl_va_range_type type, u64 size, u32 alignment);
int hl_unreserve_va_block(struct hl_device *hdev, struct hl_ctx *ctx,
u64 start_addr, u64 size);
int hl_pin_host_memory(struct hl_device *hdev, u64 addr, u64 size,
diff --git a/drivers/misc/habanalabs/common/memory.c b/drivers/misc/habanalabs/common/memory.c
index e3b40dbf154c..0a653fff08d4 100644
--- a/drivers/misc/habanalabs/common/memory.c
+++ b/drivers/misc/habanalabs/common/memory.c
@@ -755,7 +755,7 @@ static u64 get_va_block(struct hl_device *hdev,
* - Return the start address of the virtual block.
*/
u64 hl_reserve_va_block(struct hl_device *hdev, struct hl_ctx *ctx,
- enum hl_va_range_type type, u32 size, u32 alignment)
+ enum hl_va_range_type type, u64 size, u32 alignment)
{
return get_va_block(hdev, ctx->va_range[type], size, 0,
max(alignment, ctx->va_range[type]->page_size),
diff --git a/drivers/misc/habanalabs/gaudi2/gaudi2.c b/drivers/misc/habanalabs/gaudi2/gaudi2.c
index c907e0fbf182..ff0f9e9db1b5 100644
--- a/drivers/misc/habanalabs/gaudi2/gaudi2.c
+++ b/drivers/misc/habanalabs/gaudi2/gaudi2.c
@@ -2022,9 +2022,6 @@ static int gaudi2_set_fixed_properties(struct hl_device *hdev)
prop->server_type = HL_SERVER_TYPE_UNKNOWN;
- prop->cb_va_start_addr = VA_HOST_SPACE_USER_MAPPED_CB_START;
- prop->cb_va_end_addr = VA_HOST_SPACE_USER_MAPPED_CB_END;
-
prop->max_dec = NUMBER_OF_DEC;
prop->clk_pll_index = HL_GAUDI2_MME_PLL;
diff --git a/drivers/misc/habanalabs/gaudi2/gaudi2P.h b/drivers/misc/habanalabs/gaudi2/gaudi2P.h
index 347ea1dd78e2..9094a702678d 100644
--- a/drivers/misc/habanalabs/gaudi2/gaudi2P.h
+++ b/drivers/misc/habanalabs/gaudi2/gaudi2P.h
@@ -139,9 +139,6 @@
#define VA_HOST_SPACE_HPAGE_START 0xFFF0800000000000ull
#define VA_HOST_SPACE_HPAGE_END 0xFFF1000000000000ull /* 140TB */
-#define VA_HOST_SPACE_USER_MAPPED_CB_START 0xFFF1000000000000ull
-#define VA_HOST_SPACE_USER_MAPPED_CB_END 0xFFF1000100000000ull /* 4GB */
-
/* 140TB */
#define VA_HOST_SPACE_PAGE_SIZE (VA_HOST_SPACE_PAGE_END - VA_HOST_SPACE_PAGE_START)
--
2.25.1
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