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Commit 47bd10d1 authored by Guo-Fu Tseng's avatar Guo-Fu Tseng Committed by David S. Miller
Browse files

jme: Change bufinf memory location 



Instead of using a large chunk of memory space preserved for
for modules, using kmalloc to obtain the needed memory.

Signed-off-by: default avatarGuo-Fu Tseng <cooldavid@cooldavid.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 44d8d2e9

drivers/net/jme.c

+62 −24
Original line number Diff line number Diff line
@@ -522,12 +522,8 @@ jme_setup_tx_resources(struct jme_adapter *jme) 
				   &(txring->dmaalloc),

				   GFP_ATOMIC);



	if (!txring->alloc) {

		txring->desc = NULL;

		txring->dmaalloc = 0;

		txring->dma = 0;

		return -ENOMEM;

	}

	if (!txring->alloc)

		goto err_set_null;



	/*

	 * 16 Bytes align
@@ -539,6 +535,11 @@ jme_setup_tx_resources(struct jme_adapter *jme) 
	atomic_set(&txring->next_to_clean, 0);

	atomic_set(&txring->nr_free, jme->tx_ring_size);



	txring->bufinf		= kmalloc(sizeof(struct jme_buffer_info) *

					jme->tx_ring_size, GFP_ATOMIC);

	if (unlikely(!(txring->bufinf)))

		goto err_free_txring;



	/*

	 * Initialize Transmit Descriptors

	 */
@@ -547,6 +548,20 @@ jme_setup_tx_resources(struct jme_adapter *jme) 
		sizeof(struct jme_buffer_info) * jme->tx_ring_size);



	return 0;



err_free_txring:

	dma_free_coherent(&(jme->pdev->dev),

			  TX_RING_ALLOC_SIZE(jme->tx_ring_size),

			  txring->alloc,

			  txring->dmaalloc);



err_set_null:

	txring->desc = NULL;

	txring->dmaalloc = 0;

	txring->dma = 0;

	txring->bufinf = NULL;



	return -ENOMEM;

}



static void
@@ -557,6 +572,7 @@ jme_free_tx_resources(struct jme_adapter *jme) 
	struct jme_buffer_info *txbi;



	if (txring->alloc) {

		if (txring->bufinf) {

			for (i = 0 ; i < jme->tx_ring_size ; ++i) {

				txbi = txring->bufinf + i;

				if (txbi->skb) {
@@ -568,6 +584,8 @@ jme_free_tx_resources(struct jme_adapter *jme) 
				txbi->nr_desc		= 0;

				txbi->start_xmit	= 0;

			}

			kfree(txring->bufinf);

		}



		dma_free_coherent(&(jme->pdev->dev),

				  TX_RING_ALLOC_SIZE(jme->tx_ring_size),
@@ -578,11 +596,11 @@ jme_free_tx_resources(struct jme_adapter *jme) 
		txring->desc		= NULL;

		txring->dmaalloc	= 0;

		txring->dma		= 0;

		txring->bufinf		= NULL;

	}

	txring->next_to_use	= 0;

	atomic_set(&txring->next_to_clean, 0);

	atomic_set(&txring->nr_free, 0);



}



static inline void
@@ -720,8 +738,11 @@ jme_free_rx_resources(struct jme_adapter *jme) 
	struct jme_ring *rxring = &(jme->rxring[0]);



	if (rxring->alloc) {

		if (rxring->bufinf) {

			for (i = 0 ; i < jme->rx_ring_size ; ++i)

				jme_free_rx_buf(jme, i);

			kfree(rxring->bufinf);

		}



		dma_free_coherent(&(jme->pdev->dev),

				  RX_RING_ALLOC_SIZE(jme->rx_ring_size),
@@ -731,6 +752,7 @@ jme_free_rx_resources(struct jme_adapter *jme) 
		rxring->desc     = NULL;

		rxring->dmaalloc = 0;

		rxring->dma      = 0;

		rxring->bufinf   = NULL;

	}

	rxring->next_to_use   = 0;

	atomic_set(&rxring->next_to_clean, 0);
@@ -746,12 +768,8 @@ jme_setup_rx_resources(struct jme_adapter *jme) 
				   RX_RING_ALLOC_SIZE(jme->rx_ring_size),

				   &(rxring->dmaalloc),

				   GFP_ATOMIC);

	if (!rxring->alloc) {

		rxring->desc = NULL;

		rxring->dmaalloc = 0;

		rxring->dma = 0;

		return -ENOMEM;

	}

	if (!rxring->alloc)

		goto err_set_null;



	/*

	 * 16 Bytes align
@@ -762,9 +780,16 @@ jme_setup_rx_resources(struct jme_adapter *jme) 
	rxring->next_to_use	= 0;

	atomic_set(&rxring->next_to_clean, 0);



	rxring->bufinf		= kmalloc(sizeof(struct jme_buffer_info) *

					jme->rx_ring_size, GFP_ATOMIC);

	if (unlikely(!(rxring->bufinf)))

		goto err_free_rxring;



	/*

	 * Initiallize Receive Descriptors

	 */

	memset(rxring->bufinf, 0,

		sizeof(struct jme_buffer_info) * jme->rx_ring_size);

	for (i = 0 ; i < jme->rx_ring_size ; ++i) {

		if (unlikely(jme_make_new_rx_buf(jme, i))) {

			jme_free_rx_resources(jme);
@@ -775,6 +800,19 @@ jme_setup_rx_resources(struct jme_adapter *jme) 
	}



	return 0;



err_free_rxring:

	dma_free_coherent(&(jme->pdev->dev),

			  RX_RING_ALLOC_SIZE(jme->rx_ring_size),

			  rxring->alloc,

			  rxring->dmaalloc);

err_set_null:

	rxring->desc = NULL;

	rxring->dmaalloc = 0;

	rxring->dma = 0;

	rxring->bufinf = NULL;



	return -ENOMEM;

}



static inline void

drivers/net/jme.h

+1 −2
Original line number Diff line number Diff line
@@ -372,7 +372,6 @@ struct jme_buffer_info { 
/*

 * The structure holding buffer information and ring descriptors all together.

 */

#define MAX_RING_DESC_NR	1024

struct jme_ring {

	void *alloc;		/* pointer to allocated memory */

	void *desc;		/* pointer to ring memory  */
@@ -380,7 +379,7 @@ struct jme_ring { 
	dma_addr_t dma;		/* phys address for ring dma */



	/* Buffer information corresponding to each descriptor */

	struct jme_buffer_info bufinf[MAX_RING_DESC_NR];

	struct jme_buffer_info *bufinf;



	int next_to_use;

	atomic_t next_to_clean;