[PATCH v16 0/4] Replace PCI pool by DMA pool API

[PATCH v16 0/4] Replace PCI pool by DMA pool API

[Romain Perier]

The current PCI pool API are simple macro functions direct expanded to
the appropriate dma pool functions. The prototypes are almost the same
and semantically, they are very similar. I propose to use the DMA pool
API directly and get rid of the old API.

This set of patches, replaces the old API by the dma pool API
and remove the defines.

Changes in v16:
- Rebased series onto next-20171215
- I have fixed patch 04/04, so it can be applied
- Added Acked-by for Bjorn Helgaas on patch 04/04

Changes in v15:
- Rebased series onto next-20171120
- Added patch 04/05 for mpt3sas scsi driver

Changes in v14:
- Rebased series onto next-20171018
- Rebased patch 03/05 on latest driver

Changes in v13:
- Rebased series onto next-20170906
- Added a new commit for the hinic ethernet driver
- Remove previously merged patches

Changes in v12:
- Rebased series onto next-20170822

Changes in v11:
- Rebased series onto next-20170809
- Removed patches 08-14, these have been merged.

Changes in v10:
- Rebased series onto next-20170706
- I have fixed and improved patch "scsi: megaraid: Replace PCI pool old API"

Changes in v9:
- Rebased series onto next-20170522
- I have fixed and improved the patch for lpfc driver

Changes in v8:
- Rebased series onto next-20170428

Changes in v7:
- Rebased series onto next-20170416
- Added Acked-by, Tested-by and Reviwed-by tags

Changes in v6:
- Fixed an issue reported by kbuild test robot about changes in DAC960
- Removed patches 15/19,16/19,17/19,18/19. They have been merged by Greg
- Added Acked-by Tags

Changes in v5:
- Re-worded the cover letter (remove sentence about checkpatch.pl)
- Rebased series onto next-20170308
- Fix typos in commit message
- Added Acked-by Tags

Changes in v4:
- Rebased series onto next-20170301
- Removed patch 20/20: checks done by checkpath.pl, no longer required.
  Thanks to Peter and Joe for their feedbacks.
- Added Reviewed-by tags

Changes in v3:
- Rebased series onto next-20170224
- Fix checkpath.pl reports for patch 11/20 and patch 12/20
- Remove prefix RFC
Changes in v2:
- Introduced patch 18/20
- Fixed cosmetic changes: spaces before brace, live over 80 characters
- Removed some of the check for NULL pointers before calling dma_pool_destroy
- Improved the regexp in checkpatch for pci_pool, thanks to Joe Perches
- Added Tested-by and Acked-by tags

Romain Perier (4):
  block: DAC960: Replace PCI pool old API
  net: e100: Replace PCI pool old API
  hinic: Replace PCI pool old API
  PCI: Remove PCI pool macro functions

 drivers/block/DAC960.c                            | 38 +++++++++++------------
 drivers/block/DAC960.h                            |  4 +--
 drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c | 10 +++---
 drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.h |  2 +-
 drivers/net/ethernet/intel/e100.c                 | 12 +++----
 include/linux/pci.h                               |  9 ------
 6 files changed, 32 insertions(+), 43 deletions(-)

-- 
2.14.1

[PATCH v16 1/4] block: DAC960: Replace PCI pool old API

[Romain Perier]

From: Romain Perier <romain.perier@collabora.com>

The PCI pool API is deprecated. This commit replaces the PCI pool old
API by the appropriate function with the DMA pool API.

Signed-off-by: Romain Perier <romain.perier@collabora.com>
Acked-by: Peter Senna Tschudin <peter.senna@collabora.com>
Tested-by: Peter Senna Tschudin <peter.senna@collabora.com>
---
 drivers/block/DAC960.c | 38 ++++++++++++++++++--------------------
 drivers/block/DAC960.h |  4 ++--
 2 files changed, 20 insertions(+), 22 deletions(-)

diff --git a/drivers/block/DAC960.c b/drivers/block/DAC960.c
index 442e777bdfb2..df8e3a8f63ec 100644
--- a/drivers/block/DAC960.c
+++ b/drivers/block/DAC960.c
@@ -268,17 +268,17 @@ static bool DAC960_CreateAuxiliaryStructures(DAC960_Controller_T *Controller)
   void *AllocationPointer = NULL;
   void *ScatterGatherCPU = NULL;
   dma_addr_t ScatterGatherDMA;
-  struct pci_pool *ScatterGatherPool;
+  struct dma_pool *ScatterGatherPool;
   void *RequestSenseCPU = NULL;
   dma_addr_t RequestSenseDMA;
-  struct pci_pool *RequestSensePool = NULL;
+  struct dma_pool *RequestSensePool = NULL;
 
   if (Controller->FirmwareType == DAC960_V1_Controller)
     {
       CommandAllocationLength = offsetof(DAC960_Command_T, V1.EndMarker);
       CommandAllocationGroupSize = DAC960_V1_CommandAllocationGroupSize;
-      ScatterGatherPool = pci_pool_create("DAC960_V1_ScatterGather",
-		Controller->PCIDevice,
+      ScatterGatherPool = dma_pool_create("DAC960_V1_ScatterGather",
+		&Controller->PCIDevice->dev,
 	DAC960_V1_ScatterGatherLimit * sizeof(DAC960_V1_ScatterGatherSegment_T),
 	sizeof(DAC960_V1_ScatterGatherSegment_T), 0);
       if (ScatterGatherPool == NULL)
@@ -290,18 +290,18 @@ static bool DAC960_CreateAuxiliaryStructures(DAC960_Controller_T *Controller)
     {
       CommandAllocationLength = offsetof(DAC960_Command_T, V2.EndMarker);
       CommandAllocationGroupSize = DAC960_V2_CommandAllocationGroupSize;
-      ScatterGatherPool = pci_pool_create("DAC960_V2_ScatterGather",
-		Controller->PCIDevice,
+      ScatterGatherPool = dma_pool_create("DAC960_V2_ScatterGather",
+		&Controller->PCIDevice->dev,
 	DAC960_V2_ScatterGatherLimit * sizeof(DAC960_V2_ScatterGatherSegment_T),
 	sizeof(DAC960_V2_ScatterGatherSegment_T), 0);
       if (ScatterGatherPool == NULL)
 	    return DAC960_Failure(Controller,
 			"AUXILIARY STRUCTURE CREATION (SG)");
-      RequestSensePool = pci_pool_create("DAC960_V2_RequestSense",
-		Controller->PCIDevice, sizeof(DAC960_SCSI_RequestSense_T),
+      RequestSensePool = dma_pool_create("DAC960_V2_RequestSense",
+		&Controller->PCIDevice->dev, sizeof(DAC960_SCSI_RequestSense_T),
 		sizeof(int), 0);
       if (RequestSensePool == NULL) {
-	    pci_pool_destroy(ScatterGatherPool);
+	    dma_pool_destroy(ScatterGatherPool);
 	    return DAC960_Failure(Controller,
 			"AUXILIARY STRUCTURE CREATION (SG)");
       }
@@ -335,16 +335,16 @@ static bool DAC960_CreateAuxiliaryStructures(DAC960_Controller_T *Controller)
       Command->Next = Controller->FreeCommands;
       Controller->FreeCommands = Command;
       Controller->Commands[CommandIdentifier-1] = Command;
-      ScatterGatherCPU = pci_pool_alloc(ScatterGatherPool, GFP_ATOMIC,
+      ScatterGatherCPU = dma_pool_alloc(ScatterGatherPool, GFP_ATOMIC,
 							&ScatterGatherDMA);
       if (ScatterGatherCPU == NULL)
 	  return DAC960_Failure(Controller, "AUXILIARY STRUCTURE CREATION");
 
       if (RequestSensePool != NULL) {
-  	  RequestSenseCPU = pci_pool_alloc(RequestSensePool, GFP_ATOMIC,
+  	  RequestSenseCPU = dma_pool_alloc(RequestSensePool, GFP_ATOMIC,
 						&RequestSenseDMA);
   	  if (RequestSenseCPU == NULL) {
-                pci_pool_free(ScatterGatherPool, ScatterGatherCPU,
+                dma_pool_free(ScatterGatherPool, ScatterGatherCPU,
                                 ScatterGatherDMA);
     		return DAC960_Failure(Controller,
 					"AUXILIARY STRUCTURE CREATION");
@@ -379,8 +379,8 @@ static bool DAC960_CreateAuxiliaryStructures(DAC960_Controller_T *Controller)
 static void DAC960_DestroyAuxiliaryStructures(DAC960_Controller_T *Controller)
 {
   int i;
-  struct pci_pool *ScatterGatherPool = Controller->ScatterGatherPool;
-  struct pci_pool *RequestSensePool = NULL;
+  struct dma_pool *ScatterGatherPool = Controller->ScatterGatherPool;
+  struct dma_pool *RequestSensePool = NULL;
   void *ScatterGatherCPU;
   dma_addr_t ScatterGatherDMA;
   void *RequestSenseCPU;
@@ -411,9 +411,9 @@ static void DAC960_DestroyAuxiliaryStructures(DAC960_Controller_T *Controller)
 	  RequestSenseDMA = Command->V2.RequestSenseDMA;
       }
       if (ScatterGatherCPU != NULL)
-          pci_pool_free(ScatterGatherPool, ScatterGatherCPU, ScatterGatherDMA);
+          dma_pool_free(ScatterGatherPool, ScatterGatherCPU, ScatterGatherDMA);
       if (RequestSenseCPU != NULL)
-          pci_pool_free(RequestSensePool, RequestSenseCPU, RequestSenseDMA);
+          dma_pool_free(RequestSensePool, RequestSenseCPU, RequestSenseDMA);
 
       if ((Command->CommandIdentifier
 	   % Controller->CommandAllocationGroupSize) == 1) {
@@ -437,13 +437,11 @@ static void DAC960_DestroyAuxiliaryStructures(DAC960_Controller_T *Controller)
       Controller->CurrentStatusBuffer = NULL;
     }
 
-  if (ScatterGatherPool != NULL)
-  	pci_pool_destroy(ScatterGatherPool);
+  dma_pool_destroy(ScatterGatherPool);
   if (Controller->FirmwareType == DAC960_V1_Controller)
   	return;
 
-  if (RequestSensePool != NULL)
-	pci_pool_destroy(RequestSensePool);
+  dma_pool_destroy(RequestSensePool);
 
   for (i = 0; i < DAC960_MaxLogicalDrives; i++) {
 	kfree(Controller->V2.LogicalDeviceInformation[i]);
diff --git a/drivers/block/DAC960.h b/drivers/block/DAC960.h
index 6a6226a2b932..21aff470d268 100644
--- a/drivers/block/DAC960.h
+++ b/drivers/block/DAC960.h
@@ -2316,7 +2316,7 @@ typedef struct DAC960_Controller
   bool SuppressEnclosureMessages;
   struct timer_list MonitoringTimer;
   struct gendisk *disks[DAC960_MaxLogicalDrives];
-  struct pci_pool *ScatterGatherPool;
+  struct dma_pool *ScatterGatherPool;
   DAC960_Command_T *FreeCommands;
   unsigned char *CombinedStatusBuffer;
   unsigned char *CurrentStatusBuffer;
@@ -2429,7 +2429,7 @@ typedef struct DAC960_Controller
       bool NeedDeviceSerialNumberInformation;
       bool StartLogicalDeviceInformationScan;
       bool StartPhysicalDeviceInformationScan;
-      struct pci_pool *RequestSensePool;
+      struct dma_pool *RequestSensePool;
 
       dma_addr_t	FirstCommandMailboxDMA;
       DAC960_V2_CommandMailbox_T *FirstCommandMailbox;
-- 
2.14.1

[PATCH v16 2/4] net: e100: Replace PCI pool old API

[Romain Perier]

From: Romain Perier <romain.perier@collabora.com>

The PCI pool API is deprecated. This commit replaces the PCI pool old
API by the appropriate function with the DMA pool API.

Signed-off-by: Romain Perier <romain.perier@collabora.com>
Acked-by: Peter Senna Tschudin <peter.senna@collabora.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Peter Senna Tschudin <peter.senna@collabora.com>
---
 drivers/net/ethernet/intel/e100.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/intel/e100.c b/drivers/net/ethernet/intel/e100.c
index 44b3937f7e81..29486478836e 100644
--- a/drivers/net/ethernet/intel/e100.c
+++ b/drivers/net/ethernet/intel/e100.c
@@ -607,7 +607,7 @@ struct nic {
 	struct mem *mem;
 	dma_addr_t dma_addr;
 
-	struct pci_pool *cbs_pool;
+	struct dma_pool *cbs_pool;
 	dma_addr_t cbs_dma_addr;
 	u8 adaptive_ifs;
 	u8 tx_threshold;
@@ -1892,7 +1892,7 @@ static void e100_clean_cbs(struct nic *nic)
 			nic->cb_to_clean = nic->cb_to_clean->next;
 			nic->cbs_avail++;
 		}
-		pci_pool_free(nic->cbs_pool, nic->cbs, nic->cbs_dma_addr);
+		dma_pool_free(nic->cbs_pool, nic->cbs, nic->cbs_dma_addr);
 		nic->cbs = NULL;
 		nic->cbs_avail = 0;
 	}
@@ -1910,7 +1910,7 @@ static int e100_alloc_cbs(struct nic *nic)
 	nic->cb_to_use = nic->cb_to_send = nic->cb_to_clean = NULL;
 	nic->cbs_avail = 0;
 
-	nic->cbs = pci_pool_zalloc(nic->cbs_pool, GFP_KERNEL,
+	nic->cbs = dma_pool_zalloc(nic->cbs_pool, GFP_KERNEL,
 				   &nic->cbs_dma_addr);
 	if (!nic->cbs)
 		return -ENOMEM;
@@ -2960,8 +2960,8 @@ static int e100_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		netif_err(nic, probe, nic->netdev, "Cannot register net device, aborting\n");
 		goto err_out_free;
 	}
-	nic->cbs_pool = pci_pool_create(netdev->name,
-			   nic->pdev,
+	nic->cbs_pool = dma_pool_create(netdev->name,
+			   &nic->pdev->dev,
 			   nic->params.cbs.max * sizeof(struct cb),
 			   sizeof(u32),
 			   0);
@@ -3001,7 +3001,7 @@ static void e100_remove(struct pci_dev *pdev)
 		unregister_netdev(netdev);
 		e100_free(nic);
 		pci_iounmap(pdev, nic->csr);
-		pci_pool_destroy(nic->cbs_pool);
+		dma_pool_destroy(nic->cbs_pool);
 		free_netdev(netdev);
 		pci_release_regions(pdev);
 		pci_disable_device(pdev);
-- 
2.14.1

[PATCH v16 3/4] hinic: Replace PCI pool old API

[Romain Perier]

From: Romain Perier <romain.perier@collabora.com>

The PCI pool API is deprecated. This commit replaces the PCI pool old
API by the appropriate function with the DMA pool API.

Signed-off-by: Romain Perier <romain.perier@collabora.com>
---
 drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c | 10 +++++-----
 drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.h |  2 +-
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c b/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c
index 7d95f0866fb0..28a81ac97af5 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c
@@ -143,7 +143,7 @@ int hinic_alloc_cmdq_buf(struct hinic_cmdqs *cmdqs,
 	struct hinic_hwif *hwif = cmdqs->hwif;
 	struct pci_dev *pdev = hwif->pdev;
 
-	cmdq_buf->buf = pci_pool_alloc(cmdqs->cmdq_buf_pool, GFP_KERNEL,
+	cmdq_buf->buf = dma_pool_alloc(cmdqs->cmdq_buf_pool, GFP_KERNEL,
 				       &cmdq_buf->dma_addr);
 	if (!cmdq_buf->buf) {
 		dev_err(&pdev->dev, "Failed to allocate cmd from the pool\n");
@@ -161,7 +161,7 @@ int hinic_alloc_cmdq_buf(struct hinic_cmdqs *cmdqs,
 void hinic_free_cmdq_buf(struct hinic_cmdqs *cmdqs,
 			 struct hinic_cmdq_buf *cmdq_buf)
 {
-	pci_pool_free(cmdqs->cmdq_buf_pool, cmdq_buf->buf, cmdq_buf->dma_addr);
+	dma_pool_free(cmdqs->cmdq_buf_pool, cmdq_buf->buf, cmdq_buf->dma_addr);
 }
 
 static unsigned int cmdq_wqe_size_from_bdlen(enum bufdesc_len len)
@@ -875,7 +875,7 @@ int hinic_init_cmdqs(struct hinic_cmdqs *cmdqs, struct hinic_hwif *hwif,
 	int err;
 
 	cmdqs->hwif = hwif;
-	cmdqs->cmdq_buf_pool = pci_pool_create("hinic_cmdq", pdev,
+	cmdqs->cmdq_buf_pool = dma_pool_create("hinic_cmdq", &pdev->dev,
 					       HINIC_CMDQ_BUF_SIZE,
 					       HINIC_CMDQ_BUF_SIZE, 0);
 	if (!cmdqs->cmdq_buf_pool)
@@ -916,7 +916,7 @@ int hinic_init_cmdqs(struct hinic_cmdqs *cmdqs, struct hinic_hwif *hwif,
 	devm_kfree(&pdev->dev, cmdqs->saved_wqs);
 
 err_saved_wqs:
-	pci_pool_destroy(cmdqs->cmdq_buf_pool);
+	dma_pool_destroy(cmdqs->cmdq_buf_pool);
 	return err;
 }
 
@@ -942,5 +942,5 @@ void hinic_free_cmdqs(struct hinic_cmdqs *cmdqs)
 
 	devm_kfree(&pdev->dev, cmdqs->saved_wqs);
 
-	pci_pool_destroy(cmdqs->cmdq_buf_pool);
+	dma_pool_destroy(cmdqs->cmdq_buf_pool);
 }
diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.h b/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.h
index b35583400cb6..23f8d39eab68 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.h
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.h
@@ -157,7 +157,7 @@ struct hinic_cmdq {
 struct hinic_cmdqs {
 	struct hinic_hwif       *hwif;
 
-	struct pci_pool         *cmdq_buf_pool;
+	struct dma_pool         *cmdq_buf_pool;
 
 	struct hinic_wq         *saved_wqs;
 
-- 
2.14.1

[PATCH v16 4/4] PCI: Remove PCI pool macro functions

[Romain Perier]

From: Romain Perier <romain.perier@collabora.com>

Now that all the drivers use dma pool API, we can remove the macro
functions for PCI pool.

Signed-off-by: Romain Perier <romain.perier@collabora.com>
Reviewed-by: Peter Senna Tschudin <peter.senna@collabora.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 include/linux/pci.h | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/include/linux/pci.h b/include/linux/pci.h
index 66cca1c6f742..c5dd05021b14 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1314,15 +1314,6 @@ int pci_set_vga_state(struct pci_dev *pdev, bool decode,
 #include <linux/pci-dma.h>
 #include <linux/dmapool.h>
 
-#define	pci_pool dma_pool
-#define pci_pool_create(name, pdev, size, align, allocation) \
-		dma_pool_create(name, &pdev->dev, size, align, allocation)
-#define	pci_pool_destroy(pool) dma_pool_destroy(pool)
-#define	pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
-#define	pci_pool_zalloc(pool, flags, handle) \
-		dma_pool_zalloc(pool, flags, handle)
-#define	pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
-
 struct msix_entry {
 	u32	vector;	/* Kernel uses to write allocated vector */
 	u16	entry;	/* Driver uses to specify entry, OS writes */
-- 
2.14.1

Re: [PATCH v16 2/4] net: e100: Replace PCI pool old API

[David Miller]

From: Romain Perier <romain.perier@gmail.com>
Date: Fri, 15 Dec 2017 20:31:21 +0100

> From: Romain Perier <romain.perier@collabora.com>
> 
> The PCI pool API is deprecated. This commit replaces the PCI pool old
> API by the appropriate function with the DMA pool API.
> 
> Signed-off-by: Romain Perier <romain.perier@collabora.com>
> Acked-by: Peter Senna Tschudin <peter.senna@collabora.com>
> Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
> Tested-by: Peter Senna Tschudin <peter.senna@collabora.com>

Acked-by: David S. Miller <davem@davemloft.net>

Re: [PATCH v16 3/4] hinic: Replace PCI pool old API

[David Miller]

From: Romain Perier <romain.perier@gmail.com>
Date: Fri, 15 Dec 2017 20:31:22 +0100

> From: Romain Perier <romain.perier@collabora.com>
> 
> The PCI pool API is deprecated. This commit replaces the PCI pool old
> API by the appropriate function with the DMA pool API.
> 
> Signed-off-by: Romain Perier <romain.perier@collabora.com>

Acked-by: David S. Miller <davem@davemloft.net>