Merge tag 'char-misc-5.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
 "Here are some small char and misc driver fixes for 5.3-rc5.

  These are two different subsystems needing some fixes, the habanalabs
  driver which is has some more big endian fixes for problems found. The
  other are some small soundwire fixes, including some Kconfig
  dependencies needed to resolve reported build errors.

  All of these have been in linux-next this week with no reported
  issues"

* tag 'char-misc-5.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  misc: xilinx-sdfec: fix dependency and build error
  habanalabs: fix device IRQ unmasking for BE host
  habanalabs: fix endianness handling for internal QMAN submission
  habanalabs: fix completion queue handling when host is BE
  habanalabs: fix endianness handling for packets from user
  habanalabs: fix DRAM usage accounting on context tear down
  habanalabs: Avoid double free in error flow
  soundwire: fix regmap dependencies and align with other serial links
  soundwire: cadence_master: fix definitions for INTSTAT0/1
  soundwire: cadence_master: fix register definition for SLAVE_STATE

Author: torvalds

drivers/base/regmap/Kconfig

@@ -44,7 +44,7 @@ config REGMAP_IRQ
 
 config REGMAP_SOUNDWIRE
 	tristate
-	depends on SOUNDWIRE_BUS
+	depends on SOUNDWIRE
 
 config REGMAP_SCCB
 	tristate

drivers/misc/Kconfig

@@ -465,6 +465,7 @@ config PCI_ENDPOINT_TEST
 
 config XILINX_SDFEC
 	tristate "Xilinx SDFEC 16"
+	depends on HAS_IOMEM
 	help
 	  This option enables support for the Xilinx SDFEC (Soft Decision
 	  Forward Error Correction) driver. This enables a char driver

drivers/misc/habanalabs/device.c

@@ -970,7 +970,8 @@ int hl_device_init(struct hl_device *hdev, struct class *hclass)
 	rc = hl_ctx_init(hdev, hdev->kernel_ctx, true);
 	if (rc) {
 		dev_err(hdev->dev, "failed to initialize kernel context\n");
-		goto free_ctx;
+		kfree(hdev->kernel_ctx);
+		goto mmu_fini;
 	}
 
 	rc = hl_cb_pool_init(hdev);
@@ -1053,8 +1054,6 @@ int hl_device_init(struct hl_device *hdev, struct class *hclass)
 	if (hl_ctx_put(hdev->kernel_ctx) != 1)
 		dev_err(hdev->dev,
 			"kernel ctx is still alive on initialization failure\n");
-free_ctx:
-	kfree(hdev->kernel_ctx);
 mmu_fini:
 	hl_mmu_fini(hdev);
 eq_fini:

drivers/misc/habanalabs/goya/goya.c

@@ -2729,9 +2729,10 @@ void goya_ring_doorbell(struct hl_device *hdev, u32 hw_queue_id, u32 pi)
 				GOYA_ASYNC_EVENT_ID_PI_UPDATE);
 }
 
-void goya_flush_pq_write(struct hl_device *hdev, u64 *pq, u64 exp_val)
+void goya_pqe_write(struct hl_device *hdev, __le64 *pqe, struct hl_bd *bd)
 {
-	/* Not needed in Goya */
+	/* The QMANs are on the SRAM so need to copy to IO space */
+	memcpy_toio((void __iomem *) pqe, bd, sizeof(struct hl_bd));
 }
 
 static void *goya_dma_alloc_coherent(struct hl_device *hdev, size_t size,
@@ -3313,9 +3314,11 @@ static int goya_validate_dma_pkt_no_mmu(struct hl_device *hdev,
 	int rc;
 
 	dev_dbg(hdev->dev, "DMA packet details:\n");
-	dev_dbg(hdev->dev, "source == 0x%llx\n", user_dma_pkt->src_addr);
-	dev_dbg(hdev->dev, "destination == 0x%llx\n", user_dma_pkt->dst_addr);
-	dev_dbg(hdev->dev, "size == %u\n", user_dma_pkt->tsize);
+	dev_dbg(hdev->dev, "source == 0x%llx\n",
+		le64_to_cpu(user_dma_pkt->src_addr));
+	dev_dbg(hdev->dev, "destination == 0x%llx\n",
+		le64_to_cpu(user_dma_pkt->dst_addr));
+	dev_dbg(hdev->dev, "size == %u\n", le32_to_cpu(user_dma_pkt->tsize));
 
 	ctl = le32_to_cpu(user_dma_pkt->ctl);
 	user_dir = (ctl & GOYA_PKT_LIN_DMA_CTL_DMA_DIR_MASK) >>
@@ -3344,9 +3347,11 @@ static int goya_validate_dma_pkt_mmu(struct hl_device *hdev,
 				struct packet_lin_dma *user_dma_pkt)
 {
 	dev_dbg(hdev->dev, "DMA packet details:\n");
-	dev_dbg(hdev->dev, "source == 0x%llx\n", user_dma_pkt->src_addr);
-	dev_dbg(hdev->dev, "destination == 0x%llx\n", user_dma_pkt->dst_addr);
-	dev_dbg(hdev->dev, "size == %u\n", user_dma_pkt->tsize);
+	dev_dbg(hdev->dev, "source == 0x%llx\n",
+		le64_to_cpu(user_dma_pkt->src_addr));
+	dev_dbg(hdev->dev, "destination == 0x%llx\n",
+		le64_to_cpu(user_dma_pkt->dst_addr));
+	dev_dbg(hdev->dev, "size == %u\n", le32_to_cpu(user_dma_pkt->tsize));
 
 	/*
 	 * WA for HW-23.
@@ -3386,7 +3391,8 @@ static int goya_validate_wreg32(struct hl_device *hdev,
 
 	dev_dbg(hdev->dev, "WREG32 packet details:\n");
 	dev_dbg(hdev->dev, "reg_offset == 0x%x\n", reg_offset);
-	dev_dbg(hdev->dev, "value      == 0x%x\n", wreg_pkt->value);
+	dev_dbg(hdev->dev, "value      == 0x%x\n",
+		le32_to_cpu(wreg_pkt->value));
 
 	if (reg_offset != (mmDMA_CH_0_WR_COMP_ADDR_LO & 0x1FFF)) {
 		dev_err(hdev->dev, "WREG32 packet with illegal address 0x%x\n",
@@ -3428,12 +3434,13 @@ static int goya_validate_cb(struct hl_device *hdev,
 	while (cb_parsed_length < parser->user_cb_size) {
 		enum packet_id pkt_id;
 		u16 pkt_size;
-		void *user_pkt;
+		struct goya_packet *user_pkt;
 
-		user_pkt = (void *) (uintptr_t)
+		user_pkt = (struct goya_packet *) (uintptr_t)
 			(parser->user_cb->kernel_address + cb_parsed_length);
 
-		pkt_id = (enum packet_id) (((*(u64 *) user_pkt) &
+		pkt_id = (enum packet_id) (
+				(le64_to_cpu(user_pkt->header) &
 				PACKET_HEADER_PACKET_ID_MASK) >>
 					PACKET_HEADER_PACKET_ID_SHIFT);
 
@@ -3453,7 +3460,8 @@ static int goya_validate_cb(struct hl_device *hdev,
 			 * need to validate here as well because patch_cb() is
 			 * not called in MMU path while this function is called
 			 */
-			rc = goya_validate_wreg32(hdev, parser, user_pkt);
+			rc = goya_validate_wreg32(hdev,
+				parser, (struct packet_wreg32 *) user_pkt);
 			break;
 
 		case PACKET_WREG_BULK:
@@ -3481,10 +3489,10 @@ static int goya_validate_cb(struct hl_device *hdev,
 		case PACKET_LIN_DMA:
 			if (is_mmu)
 				rc = goya_validate_dma_pkt_mmu(hdev, parser,
-						user_pkt);
+					(struct packet_lin_dma *) user_pkt);
 			else
 				rc = goya_validate_dma_pkt_no_mmu(hdev, parser,
-						user_pkt);
+					(struct packet_lin_dma *) user_pkt);
 			break;
 
 		case PACKET_MSG_LONG:
@@ -3657,15 +3665,16 @@ static int goya_patch_cb(struct hl_device *hdev,
 		enum packet_id pkt_id;
 		u16 pkt_size;
 		u32 new_pkt_size = 0;
-		void *user_pkt, *kernel_pkt;
+		struct goya_packet *user_pkt, *kernel_pkt;
 
-		user_pkt = (void *) (uintptr_t)
+		user_pkt = (struct goya_packet *) (uintptr_t)
 			(parser->user_cb->kernel_address + cb_parsed_length);
-		kernel_pkt = (void *) (uintptr_t)
+		kernel_pkt = (struct goya_packet *) (uintptr_t)
 			(parser->patched_cb->kernel_address +
 					cb_patched_cur_length);
 
-		pkt_id = (enum packet_id) (((*(u64 *) user_pkt) &
+		pkt_id = (enum packet_id) (
+				(le64_to_cpu(user_pkt->header) &
 				PACKET_HEADER_PACKET_ID_MASK) >>
 					PACKET_HEADER_PACKET_ID_SHIFT);
 
@@ -3680,15 +3689,18 @@ static int goya_patch_cb(struct hl_device *hdev,
 
 		switch (pkt_id) {
 		case PACKET_LIN_DMA:
-			rc = goya_patch_dma_packet(hdev, parser, user_pkt,
-						kernel_pkt, &new_pkt_size);
+			rc = goya_patch_dma_packet(hdev, parser,
+					(struct packet_lin_dma *) user_pkt,
+					(struct packet_lin_dma *) kernel_pkt,
+					&new_pkt_size);
 			cb_patched_cur_length += new_pkt_size;
 			break;
 
 		case PACKET_WREG_32:
 			memcpy(kernel_pkt, user_pkt, pkt_size);
 			cb_patched_cur_length += pkt_size;
-			rc = goya_validate_wreg32(hdev, parser, kernel_pkt);
+			rc = goya_validate_wreg32(hdev, parser,
+					(struct packet_wreg32 *) kernel_pkt);
 			break;
 
 		case PACKET_WREG_BULK:
@@ -4352,6 +4364,8 @@ static int goya_unmask_irq_arr(struct hl_device *hdev, u32 *irq_arr,
 	size_t total_pkt_size;
 	long result;
 	int rc;
+	int irq_num_entries, irq_arr_index;
+	__le32 *goya_irq_arr;
 
 	total_pkt_size = sizeof(struct armcp_unmask_irq_arr_packet) +
 			irq_arr_size;
@@ -4369,8 +4383,16 @@ static int goya_unmask_irq_arr(struct hl_device *hdev, u32 *irq_arr,
 	if (!pkt)
 		return -ENOMEM;
 
-	pkt->length = cpu_to_le32(irq_arr_size / sizeof(irq_arr[0]));
-	memcpy(&pkt->irqs, irq_arr, irq_arr_size);
+	irq_num_entries = irq_arr_size / sizeof(irq_arr[0]);
+	pkt->length = cpu_to_le32(irq_num_entries);
+
+	/* We must perform any necessary endianness conversation on the irq
+	 * array being passed to the goya hardware
+	 */
+	for (irq_arr_index = 0, goya_irq_arr = (__le32 *) &pkt->irqs;
+			irq_arr_index < irq_num_entries ; irq_arr_index++)
+		goya_irq_arr[irq_arr_index] =
+				cpu_to_le32(irq_arr[irq_arr_index]);
 
 	pkt->armcp_pkt.ctl = cpu_to_le32(ARMCP_PACKET_UNMASK_RAZWI_IRQ_ARRAY <<
 						ARMCP_PKT_CTL_OPCODE_SHIFT);
@@ -5042,7 +5064,7 @@ static const struct hl_asic_funcs goya_funcs = {
 	.resume = goya_resume,
 	.cb_mmap = goya_cb_mmap,
 	.ring_doorbell = goya_ring_doorbell,
-	.flush_pq_write = goya_flush_pq_write,
+	.pqe_write = goya_pqe_write,
 	.asic_dma_alloc_coherent = goya_dma_alloc_coherent,
 	.asic_dma_free_coherent = goya_dma_free_coherent,
 	.get_int_queue_base = goya_get_int_queue_base,

drivers/misc/habanalabs/goya/goyaP.h

@@ -177,7 +177,7 @@ int goya_late_init(struct hl_device *hdev);
 void goya_late_fini(struct hl_device *hdev);
 
 void goya_ring_doorbell(struct hl_device *hdev, u32 hw_queue_id, u32 pi);
-void goya_flush_pq_write(struct hl_device *hdev, u64 *pq, u64 exp_val);
+void goya_pqe_write(struct hl_device *hdev, __le64 *pqe, struct hl_bd *bd);
 void goya_update_eq_ci(struct hl_device *hdev, u32 val);
 void goya_restore_phase_topology(struct hl_device *hdev);
 int goya_context_switch(struct hl_device *hdev, u32 asid);

drivers/misc/habanalabs/habanalabs.h

@@ -441,7 +441,11 @@ enum hl_pll_frequency {
  * @resume: handles IP specific H/W or SW changes for resume.
  * @cb_mmap: maps a CB.
  * @ring_doorbell: increment PI on a given QMAN.
- * @flush_pq_write: flush PQ entry write if necessary, WARN if flushing failed.
+ * @pqe_write: Write the PQ entry to the PQ. This is ASIC-specific
+ *             function because the PQs are located in different memory areas
+ *             per ASIC (SRAM, DRAM, Host memory) and therefore, the method of
+ *             writing the PQE must match the destination memory area
+ *             properties.
  * @asic_dma_alloc_coherent: Allocate coherent DMA memory by calling
  *                           dma_alloc_coherent(). This is ASIC function because
  *                           its implementation is not trivial when the driver
@@ -510,7 +514,8 @@ struct hl_asic_funcs {
 	int (*cb_mmap)(struct hl_device *hdev, struct vm_area_struct *vma,
 			u64 kaddress, phys_addr_t paddress, u32 size);
 	void (*ring_doorbell)(struct hl_device *hdev, u32 hw_queue_id, u32 pi);
-	void (*flush_pq_write)(struct hl_device *hdev, u64 *pq, u64 exp_val);
+	void (*pqe_write)(struct hl_device *hdev, __le64 *pqe,
+			struct hl_bd *bd);
 	void* (*asic_dma_alloc_coherent)(struct hl_device *hdev, size_t size,
 					dma_addr_t *dma_handle, gfp_t flag);
 	void (*asic_dma_free_coherent)(struct hl_device *hdev, size_t size,

drivers/misc/habanalabs/hw_queue.c

@@ -290,23 +290,19 @@ static void int_hw_queue_schedule_job(struct hl_cs_job *job)
 	struct hl_device *hdev = job->cs->ctx->hdev;
 	struct hl_hw_queue *q = &hdev->kernel_queues[job->hw_queue_id];
 	struct hl_bd bd;
-	u64 *pi, *pbd = (u64 *) &bd;
+	__le64 *pi;
 
 	bd.ctl = 0;
-	bd.len = __cpu_to_le32(job->job_cb_size);
-	bd.ptr = __cpu_to_le64((u64) (uintptr_t) job->user_cb);
+	bd.len = cpu_to_le32(job->job_cb_size);
+	bd.ptr = cpu_to_le64((u64) (uintptr_t) job->user_cb);
 
-	pi = (u64 *) (uintptr_t) (q->kernel_address +
+	pi = (__le64 *) (uintptr_t) (q->kernel_address +
 		((q->pi & (q->int_queue_len - 1)) * sizeof(bd)));
 
-	pi[0] = pbd[0];
-	pi[1] = pbd[1];
-
 	q->pi++;
 	q->pi &= ((q->int_queue_len << 1) - 1);
 
-	/* Flush PQ entry write. Relevant only for specific ASICs */
-	hdev->asic_funcs->flush_pq_write(hdev, pi, pbd[0]);
+	hdev->asic_funcs->pqe_write(hdev, pi, &bd);
 
 	hdev->asic_funcs->ring_doorbell(hdev, q->hw_queue_id, q->pi);
 }

drivers/misc/habanalabs/include/goya/goya_packets.h

@@ -52,6 +52,19 @@ enum goya_dma_direction {
 #define GOYA_PKT_CTL_MB_SHIFT		31
 #define GOYA_PKT_CTL_MB_MASK		0x80000000
 
+/* All packets have, at least, an 8-byte header, which contains
+ * the packet type. The kernel driver uses the packet header for packet
+ * validation and to perform any necessary required preparation before
+ * sending them off to the hardware.
+ */
+struct goya_packet {
+	__le64 header;
+	/* The rest of the packet data follows. Use the corresponding
+	 * packet_XXX struct to deference the data, based on packet type
+	 */
+	u8 contents[0];
+};
+
 struct packet_nop {
 	__le32 reserved;
 	__le32 ctl;

drivers/misc/habanalabs/irq.c

@@ -80,8 +80,7 @@ irqreturn_t hl_irq_handler_cq(int irq, void *arg)
 	struct hl_cs_job *job;
 	bool shadow_index_valid;
 	u16 shadow_index;
-	u32 *cq_entry;
-	u32 *cq_base;
+	struct hl_cq_entry *cq_entry, *cq_base;
 
 	if (hdev->disabled) {
 		dev_dbg(hdev->dev,
@@ -90,29 +89,29 @@ irqreturn_t hl_irq_handler_cq(int irq, void *arg)
 		return IRQ_HANDLED;
 	}
 
-	cq_base = (u32 *) (uintptr_t) cq->kernel_address;
+	cq_base = (struct hl_cq_entry *) (uintptr_t) cq->kernel_address;
 
 	while (1) {
-		bool entry_ready = ((cq_base[cq->ci] & CQ_ENTRY_READY_MASK)
+		bool entry_ready = ((le32_to_cpu(cq_base[cq->ci].data) &
+					CQ_ENTRY_READY_MASK)
 						>> CQ_ENTRY_READY_SHIFT);
 
 		if (!entry_ready)
 			break;
 
-		cq_entry = (u32 *) &cq_base[cq->ci];
+		cq_entry = (struct hl_cq_entry *) &cq_base[cq->ci];
 
-		/*
-		 * Make sure we read CQ entry contents after we've
+		/* Make sure we read CQ entry contents after we've
 		 * checked the ownership bit.
 		 */
 		dma_rmb();
 
-		shadow_index_valid =
-			((*cq_entry & CQ_ENTRY_SHADOW_INDEX_VALID_MASK)
+		shadow_index_valid = ((le32_to_cpu(cq_entry->data) &
+					CQ_ENTRY_SHADOW_INDEX_VALID_MASK)
 					>> CQ_ENTRY_SHADOW_INDEX_VALID_SHIFT);
 
-		shadow_index = (u16)
-			((*cq_entry & CQ_ENTRY_SHADOW_INDEX_MASK)
+		shadow_index = (u16) ((le32_to_cpu(cq_entry->data) &
+					CQ_ENTRY_SHADOW_INDEX_MASK)
 					>> CQ_ENTRY_SHADOW_INDEX_SHIFT);
 
 		queue = &hdev->kernel_queues[cq->hw_queue_id];
@@ -122,16 +121,16 @@ irqreturn_t hl_irq_handler_cq(int irq, void *arg)
 			queue_work(hdev->cq_wq, &job->finish_work);
 		}
 
-		/*
-		 * Update ci of the context's queue. There is no
+		/* Update ci of the context's queue. There is no
 		 * need to protect it with spinlock because this update is
 		 * done only inside IRQ and there is a different IRQ per
 		 * queue
 		 */
 		queue->ci = hl_queue_inc_ptr(queue->ci);
 
 		/* Clear CQ entry ready bit */
-		cq_base[cq->ci] &= ~CQ_ENTRY_READY_MASK;
+		cq_entry->data = cpu_to_le32(le32_to_cpu(cq_entry->data) &
+						~CQ_ENTRY_READY_MASK);
 
 		cq->ci = hl_cq_inc_ptr(cq->ci);
 

drivers/misc/habanalabs/memory.c

@@ -1629,6 +1629,8 @@ void hl_vm_ctx_fini(struct hl_ctx *ctx)
 			dev_dbg(hdev->dev,
 				"page list 0x%p of asid %d is still alive\n",
 				phys_pg_list, ctx->asid);
+			atomic64_sub(phys_pg_list->total_size,
+					&hdev->dram_used_mem);
 			free_phys_pg_pack(hdev, phys_pg_list);
 			idr_remove(&vm->phys_pg_pack_handles, i);
 		}